+++ /dev/null
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2011, 2012, Whamcloud, Inc.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lustre/obdfilter/filter.c
- *
- * Author: Peter Braam <braam@clusterfs.com>
- * Author: Andreas Dilger <adilger@clusterfs.com>
- */
-
-/*
- * Invariant: Get O/R i_mutex for lookup, if needed, before any journal ops
- * (which need to get journal_lock, may block if journal full).
- *
- * Invariant: Call filter_start_transno() before any journal ops to avoid the
- * same deadlock problem. We can (and want) to get rid of the
- * transno sem in favour of the dir/inode i_mutex to avoid single
- * threaded operation on the OST.
- */
-
-#define DEBUG_SUBSYSTEM S_FILTER
-
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/dcache.h>
-#include <linux/init.h>
-#include <linux/version.h>
-#include <linux/sched.h>
-#include <linux/mount.h>
-#include <linux/buffer_head.h>
-
-#include <obd_cksum.h>
-#include <obd_class.h>
-#include <obd_lov.h>
-#include <lustre_dlm.h>
-#include <lustre_fsfilt.h>
-#include <lprocfs_status.h>
-#include <lustre_log.h>
-#include <libcfs/list.h>
-#include <lustre_disk.h>
-#include <linux/slab.h>
-#include <lustre_param.h>
-#include <lustre/ll_fiemap.h>
-
-#include "filter_internal.h"
-
-static struct lvfs_callback_ops filter_lvfs_ops;
-cfs_mem_cache_t *ll_fmd_cachep;
-
-static void filter_commit_cb(struct obd_device *obd, __u64 transno,
- void *cb_data, int error)
-{
- struct obd_export *exp = cb_data;
- LASSERT(exp->exp_obd == obd);
- obd_transno_commit_cb(obd, transno, exp, error);
- class_export_cb_put(exp);
-}
-
-int filter_version_get_check(struct obd_export *exp,
- struct obd_trans_info *oti, struct inode *inode)
-{
- __u64 curr_version;
-
- if (inode == NULL || oti == NULL)
- RETURN(0);
-
- curr_version = fsfilt_get_version(exp->exp_obd, inode);
- if ((__s64)curr_version == -EOPNOTSUPP)
- RETURN(0);
- /* VBR: version is checked always because costs nothing */
- if (oti->oti_pre_version != 0 &&
- oti->oti_pre_version != curr_version) {
- CDEBUG(D_INODE, "Version mismatch "LPX64" != "LPX64"\n",
- oti->oti_pre_version, curr_version);
- cfs_spin_lock(&exp->exp_lock);
- exp->exp_vbr_failed = 1;
- cfs_spin_unlock(&exp->exp_lock);
- RETURN (-EOVERFLOW);
- }
- oti->oti_pre_version = curr_version;
- RETURN(0);
-}
-
-/* Assumes caller has already pushed us into the kernel context. */
-int filter_finish_transno(struct obd_export *exp, struct inode *inode,
- struct obd_trans_info *oti, int rc, int force_sync)
-{
- struct obd_device_target *obt = &exp->exp_obd->u.obt;
- struct tg_export_data *ted = &exp->exp_target_data;
- struct lr_server_data *lsd = class_server_data(exp->exp_obd);
- struct lsd_client_data *lcd;
- __u64 last_rcvd;
- loff_t off;
- int err, log_pri = D_RPCTRACE;
-
- /* Propagate error code. */
- if (rc)
- RETURN(rc);
-
- if (!exp->exp_obd->obd_replayable || oti == NULL)
- RETURN(rc);
-
- cfs_mutex_lock(&ted->ted_lcd_lock);
- lcd = ted->ted_lcd;
- /* if the export has already been disconnected, we have no last_rcvd slot,
- * update server data with latest transno then */
- if (lcd == NULL) {
- cfs_mutex_unlock(&ted->ted_lcd_lock);
- CWARN("commit transaction for disconnected client %s: rc %d\n",
- exp->exp_client_uuid.uuid, rc);
- err = filter_update_server_data(exp->exp_obd);
- RETURN(err);
- }
-
- /* we don't allocate new transnos for replayed requests */
- cfs_spin_lock(&obt->obt_lut->lut_translock);
- if (oti->oti_transno == 0) {
- last_rcvd = le64_to_cpu(lsd->lsd_last_transno) + 1;
- lsd->lsd_last_transno = cpu_to_le64(last_rcvd);
- LASSERT(last_rcvd >= le64_to_cpu(lcd->lcd_last_transno));
- } else {
- last_rcvd = oti->oti_transno;
- if (last_rcvd > le64_to_cpu(lsd->lsd_last_transno))
- lsd->lsd_last_transno = cpu_to_le64(last_rcvd);
- if (unlikely(last_rcvd < le64_to_cpu(lcd->lcd_last_transno))) {
- CERROR("Trying to overwrite bigger transno, on-disk: "
- LPU64", new: "LPU64"\n",
- le64_to_cpu(lcd->lcd_last_transno), last_rcvd);
- cfs_spin_lock(&exp->exp_lock);
- exp->exp_vbr_failed = 1;
- cfs_spin_unlock(&exp->exp_lock);
- cfs_spin_unlock(&obt->obt_lut->lut_translock);
- cfs_mutex_unlock(&ted->ted_lcd_lock);
- RETURN(-EOVERFLOW);
- }
- }
- oti->oti_transno = last_rcvd;
-
- lcd->lcd_last_transno = cpu_to_le64(last_rcvd);
- lcd->lcd_pre_versions[0] = cpu_to_le64(oti->oti_pre_version);
- lcd->lcd_last_xid = cpu_to_le64(oti->oti_xid);
- cfs_spin_unlock(&obt->obt_lut->lut_translock);
-
- if (inode)
- fsfilt_set_version(exp->exp_obd, inode, last_rcvd);
-
- off = ted->ted_lr_off;
- if (off <= 0) {
- CERROR("%s: client idx %d is %lld\n", exp->exp_obd->obd_name,
- ted->ted_lr_idx, ted->ted_lr_off);
- err = -EINVAL;
- } else {
- class_export_cb_get(exp); /* released when the cb is called */
- if (!force_sync)
- force_sync = fsfilt_add_journal_cb(exp->exp_obd,
- last_rcvd,
- oti->oti_handle,
- filter_commit_cb,
- exp);
-
- err = fsfilt_write_record(exp->exp_obd, obt->obt_rcvd_filp,
- lcd, sizeof(*lcd), &off,
- force_sync | exp->exp_need_sync);
- if (force_sync)
- filter_commit_cb(exp->exp_obd, last_rcvd, exp, err);
- }
- if (err) {
- log_pri = D_ERROR;
- if (rc == 0)
- rc = err;
- }
-
- CDEBUG(log_pri, "wrote trans "LPU64" for client %s at #%d: err = %d\n",
- last_rcvd, lcd->lcd_uuid, ted->ted_lr_idx, err);
- cfs_mutex_unlock(&ted->ted_lcd_lock);
- RETURN(rc);
-}
-
-void f_dput(struct dentry *dentry)
-{
- /* Can't go inside filter_ddelete because it can block */
- CDEBUG(D_INODE, "putting %s: %p, count = %d\n",
- dentry->d_name.name, dentry, atomic_read(&dentry->d_count) - 1);
- LASSERT(atomic_read(&dentry->d_count) > 0);
-
- dput(dentry);
-}
-
-static void init_brw_stats(struct brw_stats *brw_stats)
-{
- int i;
- for (i = 0; i < BRW_LAST; i++)
- cfs_spin_lock_init(&brw_stats->hist[i].oh_lock);
-}
-
-static int lprocfs_init_rw_stats(struct obd_device *obd,
- struct lprocfs_stats **stats)
-{
- int num_stats;
-
- num_stats = (sizeof(*obd->obd_type->typ_dt_ops) / sizeof(void *)) +
- LPROC_FILTER_LAST - 1;
- *stats = lprocfs_alloc_stats(num_stats, LPROCFS_STATS_FLAG_NOPERCPU);
- if (*stats == NULL)
- return -ENOMEM;
-
- lprocfs_init_ops_stats(LPROC_FILTER_LAST, *stats);
- lprocfs_counter_init(*stats, LPROC_FILTER_READ_BYTES,
- LPROCFS_CNTR_AVGMINMAX, "read_bytes", "bytes");
- lprocfs_counter_init(*stats, LPROC_FILTER_WRITE_BYTES,
- LPROCFS_CNTR_AVGMINMAX, "write_bytes", "bytes");
-
- return(0);
-}
-
-/* brw_stats are 2128, ops are 3916, ldlm are 204, so 6248 bytes per client,
- plus the procfs overhead :( */
-static int filter_export_stats_init(struct obd_device *obd,
- struct obd_export *exp,
- void *client_nid)
-{
- int rc, newnid = 0;
- ENTRY;
-
- if (obd_uuid_equals(&exp->exp_client_uuid, &obd->obd_uuid))
- /* Self-export gets no proc entry */
- RETURN(0);
-
- rc = lprocfs_exp_setup(exp, client_nid, &newnid);
- if (rc) {
- /* Mask error for already created
- * /proc entries */
- if (rc == -EALREADY)
- rc = 0;
- RETURN(rc);
- }
-
- if (newnid) {
- struct nid_stat *tmp = exp->exp_nid_stats;
- LASSERT(tmp != NULL);
-
- OBD_ALLOC(tmp->nid_brw_stats, sizeof(struct brw_stats));
- if (tmp->nid_brw_stats == NULL)
- GOTO(clean, rc = -ENOMEM);
-
- init_brw_stats(tmp->nid_brw_stats);
- rc = lprocfs_seq_create(exp->exp_nid_stats->nid_proc, "brw_stats",
- 0644, &filter_per_nid_stats_fops,
- exp->exp_nid_stats);
- if (rc)
- CWARN("Error adding the brw_stats file\n");
-
- rc = lprocfs_init_rw_stats(obd, &exp->exp_nid_stats->nid_stats);
- if (rc)
- GOTO(clean, rc);
-
- rc = lprocfs_register_stats(tmp->nid_proc, "stats",
- tmp->nid_stats);
- if (rc)
- GOTO(clean, rc);
- rc = lprocfs_nid_ldlm_stats_init(tmp);
- if (rc)
- GOTO(clean, rc);
- }
-
- RETURN(0);
- clean:
- return rc;
-}
-
-/* Add client data to the FILTER. We use a bitmap to locate a free space
- * in the last_rcvd file if cl_idx is -1 (i.e. a new client).
- * Otherwise, we have just read the data from the last_rcvd file and
- * we know its offset. */
-static int filter_client_add(struct obd_device *obd, struct obd_export *exp,
- int cl_idx)
-{
- struct obd_device_target *obt = &obd->u.obt;
- struct tg_export_data *ted = &exp->exp_target_data;
- struct lr_server_data *lsd = class_server_data(obd);
- unsigned long *bitmap = obt->obt_lut->lut_client_bitmap;
- int new_client = (cl_idx == -1);
-
- ENTRY;
-
- LASSERT(bitmap != NULL);
- LASSERTF(cl_idx > -2, "%d\n", cl_idx);
-
- /* Self-export */
- if (strcmp(ted->ted_lcd->lcd_uuid, obd->obd_uuid.uuid) == 0)
- RETURN(0);
-
- /* the bitmap operations can handle cl_idx > sizeof(long) * 8, so
- * there's no need for extra complication here
- */
- if (new_client) {
- cl_idx = cfs_find_first_zero_bit(bitmap, LR_MAX_CLIENTS);
- repeat:
- if (cl_idx >= LR_MAX_CLIENTS) {
- CERROR("no room for %u client - fix LR_MAX_CLIENTS\n",
- cl_idx);
- RETURN(-EOVERFLOW);
- }
- if (cfs_test_and_set_bit(cl_idx, bitmap)) {
- cl_idx = cfs_find_next_zero_bit(bitmap, LR_MAX_CLIENTS,
- cl_idx);
- goto repeat;
- }
- } else {
- if (cfs_test_and_set_bit(cl_idx, bitmap)) {
- CERROR("FILTER client %d: bit already set in bitmap!\n",
- cl_idx);
- LBUG();
- }
- }
-
- ted->ted_lr_idx = cl_idx;
- ted->ted_lr_off = le32_to_cpu(lsd->lsd_client_start) +
- cl_idx * le16_to_cpu(lsd->lsd_client_size);
- cfs_mutex_init(&ted->ted_lcd_lock);
- LASSERTF(ted->ted_lr_off > 0, "ted_lr_off = %llu\n", ted->ted_lr_off);
-
- CDEBUG(D_INFO, "client at index %d (%llu) with UUID '%s' added\n",
- ted->ted_lr_idx, ted->ted_lr_off, ted->ted_lcd->lcd_uuid);
-
- if (new_client) {
- struct lvfs_run_ctxt saved;
- loff_t off = ted->ted_lr_off;
- int rc;
- void *handle;
-
- CDEBUG(D_INFO, "writing client lcd at idx %u (%llu) (len %u)\n",
- ted->ted_lr_idx,off,(unsigned int)sizeof(*ted->ted_lcd));
-
- if (OBD_FAIL_CHECK(OBD_FAIL_TGT_CLIENT_ADD))
- RETURN(-ENOSPC);
-
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- /* Transaction needed to fix bug 1403 */
- handle = fsfilt_start(obd,
- obt->obt_rcvd_filp->f_dentry->d_inode,
- FSFILT_OP_SETATTR, NULL);
- if (IS_ERR(handle)) {
- rc = PTR_ERR(handle);
- CERROR("unable to start transaction: rc %d\n", rc);
- } else {
- ted->ted_lcd->lcd_last_epoch = lsd->lsd_start_epoch;
- exp->exp_last_request_time = cfs_time_current_sec();
- rc = fsfilt_add_journal_cb(obd, 0, handle,
- target_client_add_cb,
- class_export_cb_get(exp));
- if (rc == 0) {
- cfs_spin_lock(&exp->exp_lock);
- exp->exp_need_sync = 1;
- cfs_spin_unlock(&exp->exp_lock);
- }
- rc = fsfilt_write_record(obd, obt->obt_rcvd_filp,
- ted->ted_lcd,
- sizeof(*ted->ted_lcd),
- &off, rc /* sync if no cb */);
- fsfilt_commit(obd,
- obt->obt_rcvd_filp->f_dentry->d_inode,
- handle, 0);
- }
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
-
- if (rc) {
- CERROR("error writing %s client idx %u: rc %d\n",
- LAST_RCVD, ted->ted_lr_idx, rc);
- RETURN(rc);
- }
- }
- RETURN(0);
-}
-
-static int filter_client_del(struct obd_export *exp)
-{
- struct tg_export_data *ted = &exp->exp_target_data;
- struct obd_device_target *obt = &exp->exp_obd->u.obt;
- struct lvfs_run_ctxt saved;
- int rc;
- loff_t off;
- ENTRY;
-
- if (ted->ted_lcd == NULL)
- RETURN(0);
-
- /* XXX if lcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
- if (strcmp(ted->ted_lcd->lcd_uuid, exp->exp_obd->obd_uuid.uuid ) == 0)
- GOTO(free, 0);
-
- LASSERT(obt->obt_lut->lut_client_bitmap != NULL);
-
- off = ted->ted_lr_off;
-
- CDEBUG(D_INFO, "freeing client at idx %u, offset %lld with UUID '%s'\n",
- ted->ted_lr_idx, ted->ted_lr_off, ted->ted_lcd->lcd_uuid);
-
- /* Don't clear ted_lr_idx here as it is likely also unset. At worst
- * we leak a client slot that will be cleaned on the next recovery. */
- if (off <= 0) {
- CERROR("%s: client idx %d has med_off %lld\n",
- exp->exp_obd->obd_name, ted->ted_lr_idx, off);
- GOTO(free, rc = -EINVAL);
- }
-
- /* Clear the bit _after_ zeroing out the client so we don't
- race with filter_client_add and zero out new clients.*/
- if (!cfs_test_bit(ted->ted_lr_idx, obt->obt_lut->lut_client_bitmap)) {
- CERROR("FILTER client %u: bit already clear in bitmap!!\n",
- ted->ted_lr_idx);
- LBUG();
- }
-
- push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
- /* Make sure the server's last_transno is up to date.
- * This should be done before zeroing client slot so last_transno will
- * be in server data or in client data in case of failure */
- filter_update_server_data(exp->exp_obd);
-
- cfs_mutex_lock(&ted->ted_lcd_lock);
- memset(ted->ted_lcd->lcd_uuid, 0, sizeof ted->ted_lcd->lcd_uuid);
- rc = fsfilt_write_record(exp->exp_obd, obt->obt_rcvd_filp,
- ted->ted_lcd,
- sizeof(*ted->ted_lcd), &off, 0);
- cfs_mutex_unlock(&ted->ted_lcd_lock);
- pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
-
- CDEBUG(rc == 0 ? D_INFO : D_ERROR,
- "zero out client %s at idx %u/%llu in %s, rc %d\n",
- ted->ted_lcd->lcd_uuid, ted->ted_lr_idx, ted->ted_lr_off,
- LAST_RCVD, rc);
- EXIT;
-free:
- return 0;
-}
-
-/* drop fmd reference, free it if last ref. must be called with fed_lock held.*/
-static inline void filter_fmd_put_nolock(struct filter_export_data *fed,
- struct filter_mod_data *fmd)
-{
- LASSERT_SPIN_LOCKED(&fed->fed_lock);
- if (--fmd->fmd_refcount == 0) {
- /* XXX when we have persistent reservations and the handle
- * is stored herein we need to drop it here. */
- fed->fed_mod_count--;
- cfs_list_del(&fmd->fmd_list);
- OBD_SLAB_FREE(fmd, ll_fmd_cachep, sizeof(*fmd));
- }
-}
-
-/* drop fmd reference, free it if last ref */
-void filter_fmd_put(struct obd_export *exp, struct filter_mod_data *fmd)
-{
- struct filter_export_data *fed;
-
- if (fmd == NULL)
- return;
-
- fed = &exp->exp_filter_data;
- cfs_spin_lock(&fed->fed_lock);
- filter_fmd_put_nolock(fed, fmd); /* caller reference */
- cfs_spin_unlock(&fed->fed_lock);
-}
-
-/* expire entries from the end of the list if there are too many
- * or they are too old */
-static void filter_fmd_expire_nolock(struct filter_obd *filter,
- struct filter_export_data *fed,
- struct filter_mod_data *keep)
-{
- struct filter_mod_data *fmd, *tmp;
-
- cfs_list_for_each_entry_safe(fmd, tmp, &fed->fed_mod_list, fmd_list) {
- if (fmd == keep)
- break;
-
- if (cfs_time_before(jiffies, fmd->fmd_expire) &&
- fed->fed_mod_count < filter->fo_fmd_max_num)
- break;
-
- cfs_list_del_init(&fmd->fmd_list);
- filter_fmd_put_nolock(fed, fmd); /* list reference */
- }
-}
-
-void filter_fmd_expire(struct obd_export *exp)
-{
- cfs_spin_lock(&exp->exp_filter_data.fed_lock);
- filter_fmd_expire_nolock(&exp->exp_obd->u.filter,
- &exp->exp_filter_data, NULL);
- cfs_spin_unlock(&exp->exp_filter_data.fed_lock);
-}
-
-/* find specified objid, group in export fmd list.
- * caller must hold fed_lock and take fmd reference itself */
-static struct filter_mod_data *filter_fmd_find_nolock(struct filter_obd *filter,
- struct filter_export_data *fed,
- obd_id objid, obd_seq group)
-{
- struct filter_mod_data *found = NULL, *fmd;
-
- LASSERT_SPIN_LOCKED(&fed->fed_lock);
-
- cfs_list_for_each_entry_reverse(fmd, &fed->fed_mod_list, fmd_list) {
- if (fmd->fmd_id == objid && fmd->fmd_gr == group) {
- found = fmd;
- cfs_list_del(&fmd->fmd_list);
- cfs_list_add_tail(&fmd->fmd_list, &fed->fed_mod_list);
- fmd->fmd_expire = jiffies + filter->fo_fmd_max_age;
- break;
- }
- }
-
- filter_fmd_expire_nolock(filter, fed, found);
-
- return found;
-}
-
-/* Find fmd based on objid and group, or return NULL if not found. */
-struct filter_mod_data *filter_fmd_find(struct obd_export *exp,
- obd_id objid, obd_seq group)
-{
- struct filter_mod_data *fmd;
-
- cfs_spin_lock(&exp->exp_filter_data.fed_lock);
- fmd = filter_fmd_find_nolock(&exp->exp_obd->u.filter,
- &exp->exp_filter_data, objid, group);
- if (fmd)
- fmd->fmd_refcount++; /* caller reference */
- cfs_spin_unlock(&exp->exp_filter_data.fed_lock);
-
- return fmd;
-}
-
-/* Find fmd based on objid and group, or create a new one if none is found.
- * It is possible for this function to return NULL under memory pressure,
- * or if objid = 0 is passed (which will only cause old entries to expire).
- * Currently this is not fatal because any fmd state is transient and
- * may also be freed when it gets sufficiently old. */
-struct filter_mod_data *filter_fmd_get(struct obd_export *exp,
- obd_id objid, obd_seq group)
-{
- struct filter_export_data *fed = &exp->exp_filter_data;
- struct filter_mod_data *found = NULL, *fmd_new = NULL;
-
- OBD_SLAB_ALLOC_PTR_GFP(fmd_new, ll_fmd_cachep, CFS_ALLOC_IO);
-
- cfs_spin_lock(&fed->fed_lock);
- found = filter_fmd_find_nolock(&exp->exp_obd->u.filter,fed,objid,group);
- if (fmd_new) {
- if (found == NULL) {
- cfs_list_add_tail(&fmd_new->fmd_list,
- &fed->fed_mod_list);
- fmd_new->fmd_id = objid;
- fmd_new->fmd_gr = group;
- fmd_new->fmd_refcount++; /* list reference */
- found = fmd_new;
- fed->fed_mod_count++;
- } else {
- OBD_SLAB_FREE(fmd_new, ll_fmd_cachep, sizeof(*fmd_new));
- }
- }
- if (found) {
- found->fmd_refcount++; /* caller reference */
- found->fmd_expire = jiffies +
- exp->exp_obd->u.filter.fo_fmd_max_age;
- }
-
- cfs_spin_unlock(&fed->fed_lock);
-
- return found;
-}
-
-#ifdef DO_FMD_DROP
-/* drop fmd list reference so it will disappear when last reference is put.
- * This isn't so critical because it would in fact only affect the one client
- * that is doing the unlink and at worst we have an stale entry referencing
- * an object that should never be used again. */
-static void filter_fmd_drop(struct obd_export *exp, obd_id objid, obd_seq group)
-{
- struct filter_mod_data *found = NULL;
-
- cfs_spin_lock(&exp->exp_filter_data.fed_lock);
- found = filter_fmd_find_nolock(&exp->exp_filter_data, objid, group);
- if (found) {
- cfs_list_del_init(&found->fmd_list);
- filter_fmd_put_nolock(&exp->exp_filter_data, found);
- }
- cfs_spin_unlock(&exp->exp_filter_data.fed_lock);
-}
-#else
-#define filter_fmd_drop(exp, objid, group)
-#endif
-
-/* remove all entries from fmd list */
-static void filter_fmd_cleanup(struct obd_export *exp)
-{
- struct filter_export_data *fed = &exp->exp_filter_data;
- struct filter_mod_data *fmd = NULL, *tmp;
-
- cfs_spin_lock(&fed->fed_lock);
- cfs_list_for_each_entry_safe(fmd, tmp, &fed->fed_mod_list, fmd_list) {
- cfs_list_del_init(&fmd->fmd_list);
- filter_fmd_put_nolock(fed, fmd);
- }
- cfs_spin_unlock(&fed->fed_lock);
-}
-
-static int filter_init_export(struct obd_export *exp)
-{
- int rc;
- ENTRY;
-
- cfs_spin_lock_init(&exp->exp_filter_data.fed_lock);
- CFS_INIT_LIST_HEAD(&exp->exp_filter_data.fed_mod_list);
-
- cfs_spin_lock(&exp->exp_lock);
- exp->exp_connecting = 1;
- cfs_spin_unlock(&exp->exp_lock);
-
- /* self-export doesn't need client data and ldlm initialization */
- if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
- &exp->exp_client_uuid)))
- RETURN(0);
-
- rc = lut_client_alloc(exp);
- if (rc == 0)
- rc = ldlm_init_export(exp);
- if (rc)
- CERROR("%s: Can't initialize export: rc %d\n",
- exp->exp_obd->obd_name, rc);
-
- RETURN(rc);
-}
-
-static int filter_free_server_data(struct obd_device_target *obt)
-{
- lut_fini(NULL, obt->obt_lut);
- OBD_FREE_PTR(obt->obt_lut);
- return 0;
-}
-
-/* assumes caller is already in kernel ctxt */
-int filter_update_server_data(struct obd_device *obd)
-{
- struct file *filp = obd->u.obt.obt_rcvd_filp;
- struct lr_server_data *lsd = class_server_data(obd);
- loff_t off = 0;
- int rc;
- ENTRY;
-
- CDEBUG(D_INODE, "server uuid : %s\n", lsd->lsd_uuid);
- CDEBUG(D_INODE, "server last_rcvd : "LPU64"\n",
- le64_to_cpu(lsd->lsd_last_transno));
- CDEBUG(D_INODE, "server last_mount: "LPU64"\n",
- le64_to_cpu(lsd->lsd_mount_count));
-
- rc = fsfilt_write_record(obd, filp, lsd, sizeof(*lsd), &off, 0);
- if (rc)
- CERROR("error writing lr_server_data: rc = %d\n", rc);
-
- RETURN(rc);
-}
-
-int filter_update_last_objid(struct obd_device *obd, obd_seq group,
- int force_sync)
-{
- struct filter_obd *filter = &obd->u.filter;
- __u64 tmp;
- loff_t off = 0;
- int rc;
- ENTRY;
-
- if (filter->fo_last_objid_files[group] == NULL) {
- CERROR("Object seq "LPU64" not fully setup; not updating "
- "last_objid\n", group);
- RETURN(-EINVAL);
- }
-
- CDEBUG(D_INODE, "%s: server last_objid for "POSTID"\n",
- obd->obd_name, filter->fo_last_objids[group], group);
-
- tmp = cpu_to_le64(filter->fo_last_objids[group]);
- rc = fsfilt_write_record(obd, filter->fo_last_objid_files[group],
- &tmp, sizeof(tmp), &off, force_sync);
- if (rc)
- CERROR("error writing seq "LPU64" last objid: rc = %d\n",
- group, rc);
- RETURN(rc);
-}
-extern int ost_handle(struct ptlrpc_request *req);
-/* assumes caller has already in kernel ctxt */
-static int filter_init_server_data(struct obd_device *obd, struct file * filp)
-{
- struct filter_obd *filter = &obd->u.filter;
- struct lr_server_data *lsd;
- struct lsd_client_data *lcd = NULL;
- struct inode *inode = filp->f_dentry->d_inode;
- unsigned long last_rcvd_size = i_size_read(inode);
- struct lu_target *lut;
- __u64 mount_count;
- __u32 start_epoch;
- int cl_idx;
- loff_t off = 0;
- int rc;
-
- /* ensure padding in the struct is the correct size */
- CLASSERT (offsetof(struct lr_server_data, lsd_padding) +
- sizeof(lsd->lsd_padding) == LR_SERVER_SIZE);
- CLASSERT (offsetof(struct lsd_client_data, lcd_padding) +
- sizeof(lcd->lcd_padding) == LR_CLIENT_SIZE);
-
- /* allocate and initialize lu_target */
- OBD_ALLOC_PTR(lut);
- if (lut == NULL)
- RETURN(-ENOMEM);
- rc = lut_init(NULL, lut, obd, NULL);
- if (rc)
- GOTO(err_lut, rc);
- lsd = class_server_data(obd);
- if (last_rcvd_size == 0) {
- LCONSOLE_WARN("%s: new disk, initializing\n", obd->obd_name);
-
- memcpy(lsd->lsd_uuid, obd->obd_uuid.uuid,sizeof(lsd->lsd_uuid));
- lsd->lsd_last_transno = 0;
- mount_count = lsd->lsd_mount_count = 0;
- lsd->lsd_server_size = cpu_to_le32(LR_SERVER_SIZE);
- lsd->lsd_client_start = cpu_to_le32(LR_CLIENT_START);
- lsd->lsd_client_size = cpu_to_le16(LR_CLIENT_SIZE);
- lsd->lsd_subdir_count = cpu_to_le16(FILTER_SUBDIR_COUNT);
- filter->fo_subdir_count = FILTER_SUBDIR_COUNT;
- /* OBD_COMPAT_OST is set in filter_connect_internal when the
- * MDS first connects and assigns the OST index number. */
- lsd->lsd_feature_incompat = cpu_to_le32(OBD_INCOMPAT_COMMON_LR|
- OBD_INCOMPAT_OST);
- } else {
- rc = fsfilt_read_record(obd, filp, lsd, sizeof(*lsd), &off);
- if (rc) {
- CDEBUG(D_INODE,"OBD filter: error reading %s: rc %d\n",
- LAST_RCVD, rc);
- GOTO(err_lut, rc);
- }
- if (strcmp(lsd->lsd_uuid, obd->obd_uuid.uuid) != 0) {
- LCONSOLE_ERROR_MSG(0x134, "Trying to start OBD %s "
- "using the wrong disk %s. Were the "
- "/dev/ assignments rearranged?\n",
- obd->obd_uuid.uuid, lsd->lsd_uuid);
- GOTO(err_lut, rc = -EINVAL);
- }
- mount_count = le64_to_cpu(lsd->lsd_mount_count);
- filter->fo_subdir_count = le16_to_cpu(lsd->lsd_subdir_count);
- /* COMPAT_146 */
- /* Assume old last_rcvd format unless I_C_LR is set */
- if (!(lsd->lsd_feature_incompat &
- cpu_to_le32(OBD_INCOMPAT_COMMON_LR)))
- lsd->lsd_last_transno = lsd->lsd_compat14;
- /* end COMPAT_146 */
- /* OBD_COMPAT_OST is set in filter_connect_internal when the
- * MDS first connects and assigns the OST index number. */
- lsd->lsd_feature_incompat |= cpu_to_le32(OBD_INCOMPAT_COMMON_LR|
- OBD_INCOMPAT_OST);
- }
-
- if (lsd->lsd_feature_incompat & ~cpu_to_le32(FILTER_INCOMPAT_SUPP)) {
- CERROR("%s: unsupported incompat filesystem feature(s) %x\n",
- obd->obd_name, le32_to_cpu(lsd->lsd_feature_incompat) &
- ~FILTER_INCOMPAT_SUPP);
- GOTO(err_lut, rc = -EINVAL);
- }
- if (lsd->lsd_feature_rocompat & ~cpu_to_le32(FILTER_ROCOMPAT_SUPP)) {
- CERROR("%s: unsupported read-only filesystem feature(s) %x\n",
- obd->obd_name, le32_to_cpu(lsd->lsd_feature_rocompat) &
- ~FILTER_ROCOMPAT_SUPP);
- /* Do something like remount filesystem read-only */
- GOTO(err_lut, rc = -EINVAL);
- }
-
- start_epoch = le32_to_cpu(lsd->lsd_start_epoch);
-
- CDEBUG(D_INODE, "%s: server start_epoch : %#x\n",
- obd->obd_name, start_epoch);
- CDEBUG(D_INODE, "%s: server last_transno : "LPX64"\n",
- obd->obd_name, le64_to_cpu(lsd->lsd_last_transno));
- CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n",
- obd->obd_name, mount_count + 1);
- CDEBUG(D_INODE, "%s: server data size: %u\n",
- obd->obd_name, le32_to_cpu(lsd->lsd_server_size));
- CDEBUG(D_INODE, "%s: per-client data start: %u\n",
- obd->obd_name, le32_to_cpu(lsd->lsd_client_start));
- CDEBUG(D_INODE, "%s: per-client data size: %u\n",
- obd->obd_name, le32_to_cpu(lsd->lsd_client_size));
- CDEBUG(D_INODE, "%s: server subdir_count: %u\n",
- obd->obd_name, le16_to_cpu(lsd->lsd_subdir_count));
- CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name,
- last_rcvd_size <= le32_to_cpu(lsd->lsd_client_start) ? 0 :
- (last_rcvd_size - le32_to_cpu(lsd->lsd_client_start)) /
- le16_to_cpu(lsd->lsd_client_size));
-
- if (!obd->obd_replayable) {
- CWARN("%s: recovery support OFF\n", obd->obd_name);
- GOTO(out, rc = 0);
- }
-
- OBD_ALLOC_PTR(lcd);
- if (!lcd)
- GOTO(err_client, rc = -ENOMEM);
-
- for (cl_idx = 0, off = le32_to_cpu(lsd->lsd_client_start);
- off < last_rcvd_size; cl_idx++) {
- __u64 last_rcvd;
- struct obd_export *exp;
- struct filter_export_data *fed;
-
- /* Don't assume off is incremented properly by
- * fsfilt_read_record(), in case sizeof(*lcd)
- * isn't the same as lsd->lsd_client_size. */
- off = le32_to_cpu(lsd->lsd_client_start) +
- cl_idx * le16_to_cpu(lsd->lsd_client_size);
- rc = fsfilt_read_record(obd, filp, lcd, sizeof(*lcd), &off);
- if (rc) {
- CERROR("error reading FILT %s idx %d off %llu: rc %d\n",
- LAST_RCVD, cl_idx, off, rc);
- break; /* read error shouldn't cause startup to fail */
- }
-
- if (lcd->lcd_uuid[0] == '\0') {
- CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
- cl_idx);
- continue;
- }
-
- check_lcd(obd->obd_name, cl_idx, lcd);
-
- last_rcvd = le64_to_cpu(lcd->lcd_last_transno);
-
- CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
- " srv lr: "LPU64"\n", lcd->lcd_uuid, cl_idx,
- last_rcvd, le64_to_cpu(lsd->lsd_last_transno));
-
- /* These exports are cleaned up by filter_disconnect(), so they
- * need to be set up like real exports as filter_connect() does.
- */
- exp = class_new_export(obd, (struct obd_uuid *)lcd->lcd_uuid);
- if (IS_ERR(exp)) {
- if (PTR_ERR(exp) == -EALREADY) {
- /* export already exists, zero out this one */
- CERROR("Duplicate export %s!\n", lcd->lcd_uuid);
- continue;
- }
- OBD_FREE_PTR(lcd);
- GOTO(err_client, rc = PTR_ERR(exp));
- }
-
- fed = &exp->exp_filter_data;
- *fed->fed_ted.ted_lcd = *lcd;
- fed->fed_group = 0; /* will be assigned at connect */
- filter_export_stats_init(obd, exp, NULL);
- rc = filter_client_add(obd, exp, cl_idx);
- /* can't fail for existing client */
- LASSERTF(rc == 0, "rc = %d\n", rc);
-
- /* VBR: set export last committed */
- exp->exp_last_committed = last_rcvd;
- cfs_spin_lock(&exp->exp_lock);
- exp->exp_connecting = 0;
- exp->exp_in_recovery = 0;
- cfs_spin_unlock(&exp->exp_lock);
- obd->obd_max_recoverable_clients++;
- class_export_put(exp);
-
- if (last_rcvd > le64_to_cpu(lsd->lsd_last_transno))
- lsd->lsd_last_transno = cpu_to_le64(last_rcvd);
- }
- OBD_FREE_PTR(lcd);
-
- obd->obd_last_committed = le64_to_cpu(lsd->lsd_last_transno);
-out:
- obd->u.obt.obt_mount_count = mount_count + 1;
- obd->u.obt.obt_instance = (__u32)obd->u.obt.obt_mount_count;
- lsd->lsd_mount_count = cpu_to_le64(obd->u.obt.obt_mount_count);
-
- /* save it, so mount count and last_transno is current */
- rc = filter_update_server_data(obd);
- if (rc)
- GOTO(err_client, rc);
-
- RETURN(0);
-
-err_client:
- class_disconnect_exports(obd);
-err_lut:
- filter_free_server_data(&obd->u.obt);
- RETURN(rc);
-}
-
-static int filter_cleanup_groups(struct obd_device *obd)
-{
- struct filter_obd *filter = &obd->u.filter;
- struct file *filp;
- struct dentry *dentry;
- int i, j;
- ENTRY;
-
- if (filter->fo_dentry_O_groups != NULL) {
- for (i = 0; i < filter->fo_group_count; i++) {
- dentry = filter->fo_dentry_O_groups[i];
- if (dentry != NULL)
- f_dput(dentry);
- }
- OBD_FREE(filter->fo_dentry_O_groups,
- filter->fo_group_count *
- sizeof(*filter->fo_dentry_O_groups));
- filter->fo_dentry_O_groups = NULL;
- }
- if (filter->fo_last_objid_files != NULL) {
- for (i = 0; i < filter->fo_group_count; i++) {
- filp = filter->fo_last_objid_files[i];
- if (filp != NULL)
- filp_close(filp, 0);
- }
- OBD_FREE(filter->fo_last_objid_files,
- filter->fo_group_count *
- sizeof(*filter->fo_last_objid_files));
- filter->fo_last_objid_files = NULL;
- }
- if (filter->fo_dentry_O_sub != NULL) {
- for (i = 0; i < filter->fo_group_count; i++) {
- for (j = 0; j < filter->fo_subdir_count; j++) {
- dentry = filter->fo_dentry_O_sub[i].dentry[j];
- if (dentry != NULL)
- f_dput(dentry);
- }
- }
- OBD_FREE(filter->fo_dentry_O_sub,
- filter->fo_group_count *
- sizeof(*filter->fo_dentry_O_sub));
- filter->fo_dentry_O_sub = NULL;
- }
- if (filter->fo_last_objids != NULL) {
- OBD_FREE(filter->fo_last_objids,
- filter->fo_group_count *
- sizeof(*filter->fo_last_objids));
- filter->fo_last_objids = NULL;
- }
- if (filter->fo_dentry_O != NULL) {
- f_dput(filter->fo_dentry_O);
- filter->fo_dentry_O = NULL;
- }
- RETURN(0);
-}
-
-static int filter_update_last_group(struct obd_device *obd, int group)
-{
- struct filter_obd *filter = &obd->u.filter;
- struct file *filp = NULL;
- int last_group = 0, rc;
- loff_t off = 0;
- ENTRY;
-
- if (group <= filter->fo_committed_group)
- RETURN(0);
-
- filp = filp_open("LAST_GROUP", O_RDWR, 0700);
- if (IS_ERR(filp)) {
- rc = PTR_ERR(filp);
- filp = NULL;
- CERROR("cannot open LAST_GROUP: rc = %d\n", rc);
- GOTO(cleanup, rc);
- }
-
- rc = fsfilt_read_record(obd, filp, &last_group, sizeof(__u32), &off);
- if (rc) {
- CDEBUG(D_INODE, "error reading LAST_GROUP: rc %d\n",rc);
- GOTO(cleanup, rc);
- }
-
- CDEBUG(D_INODE, "%s: previous %d, new %d\n",
- obd->obd_name, last_group, group);
-
- off = 0;
- last_group = group;
- /* must be sync: bXXXX */
- rc = fsfilt_write_record(obd, filp, &last_group, sizeof(__u32), &off, 1);
- if (rc) {
- CDEBUG(D_INODE, "error updating LAST_GROUP: rc %d\n", rc);
- GOTO(cleanup, rc);
- }
-
- filter->fo_committed_group = group;
-cleanup:
- if (filp)
- filp_close(filp, 0);
- RETURN(rc);
-}
-
-static int filter_read_group_internal(struct obd_device *obd, int group,
- int create)
-{
- struct filter_obd *filter = &obd->u.filter;
- __u64 *new_objids = NULL;
- struct filter_subdirs *new_subdirs = NULL, *tmp_subdirs = NULL;
- struct dentry **new_groups = NULL;
- struct file **new_files = NULL;
- struct dentry *dentry;
- struct file *filp;
- int old_count = filter->fo_group_count, rc, stage = 0, i;
- char name[25];
- __u64 last_objid;
- loff_t off = 0;
- int len = group + 1;
-
- snprintf(name, 24, "%d", group);
- name[24] = '\0';
-
- if (!create) {
- dentry = ll_lookup_one_len(name, filter->fo_dentry_O,
- strlen(name));
- if (IS_ERR(dentry)) {
- CERROR("Cannot lookup expected object group %d: %ld\n",
- group, PTR_ERR(dentry));
- RETURN(PTR_ERR(dentry));
- }
- } else {
- dentry = simple_mkdir(filter->fo_dentry_O,
- obd->u.obt.obt_vfsmnt, name, 0700, 1);
- if (IS_ERR(dentry)) {
- CERROR("cannot lookup/create O/%s: rc = %ld\n", name,
- PTR_ERR(dentry));
- RETURN(PTR_ERR(dentry));
- }
- }
- stage = 1;
-
- snprintf(name, 24, "O/%d/LAST_ID", group);
- name[24] = '\0';
- filp = filp_open(name, O_CREAT | O_RDWR, 0700);
- if (IS_ERR(filp)) {
- CERROR("cannot create %s: rc = %ld\n", name, PTR_ERR(filp));
- GOTO(cleanup, rc = PTR_ERR(filp));
- }
- stage = 2;
-
- rc = fsfilt_read_record(obd, filp, &last_objid, sizeof(__u64), &off);
- if (rc) {
- CDEBUG(D_INODE, "error reading %s: rc %d\n", name, rc);
- GOTO(cleanup, rc);
- }
-
- if (filter->fo_subdir_count && fid_seq_is_mdt(group)) {
- OBD_ALLOC(tmp_subdirs, sizeof(*tmp_subdirs));
- if (tmp_subdirs == NULL)
- GOTO(cleanup, rc = -ENOMEM);
- stage = 3;
-
- for (i = 0; i < filter->fo_subdir_count; i++) {
- char dir[20];
- snprintf(dir, sizeof(dir), "d%u", i);
-
- tmp_subdirs->dentry[i] = simple_mkdir(dentry,
- obd->u.obt.obt_vfsmnt,
- dir, 0700, 1);
- if (IS_ERR(tmp_subdirs->dentry[i])) {
- rc = PTR_ERR(tmp_subdirs->dentry[i]);
- CERROR("can't lookup/create O/%d/%s: rc = %d\n",
- group, dir, rc);
- GOTO(cleanup, rc);
- }
-
- CDEBUG(D_INODE, "got/created O/%d/%s: %p\n", group, dir,
- tmp_subdirs->dentry[i]);
- }
- }
-
- /* 'group' is an index; we need an array of length 'group + 1' */
- if (group + 1 > old_count) {
- OBD_ALLOC(new_objids, len * sizeof(*new_objids));
- OBD_ALLOC(new_subdirs, len * sizeof(*new_subdirs));
- OBD_ALLOC(new_groups, len * sizeof(*new_groups));
- OBD_ALLOC(new_files, len * sizeof(*new_files));
- stage = 4;
- if (new_objids == NULL || new_subdirs == NULL ||
- new_groups == NULL || new_files == NULL)
- GOTO(cleanup, rc = -ENOMEM);
-
- if (old_count) {
- memcpy(new_objids, filter->fo_last_objids,
- old_count * sizeof(*new_objids));
- memcpy(new_subdirs, filter->fo_dentry_O_sub,
- old_count * sizeof(*new_subdirs));
- memcpy(new_groups, filter->fo_dentry_O_groups,
- old_count * sizeof(*new_groups));
- memcpy(new_files, filter->fo_last_objid_files,
- old_count * sizeof(*new_files));
-
- OBD_FREE(filter->fo_last_objids,
- old_count * sizeof(*new_objids));
- OBD_FREE(filter->fo_dentry_O_sub,
- old_count * sizeof(*new_subdirs));
- OBD_FREE(filter->fo_dentry_O_groups,
- old_count * sizeof(*new_groups));
- OBD_FREE(filter->fo_last_objid_files,
- old_count * sizeof(*new_files));
- }
- filter->fo_last_objids = new_objids;
- filter->fo_dentry_O_sub = new_subdirs;
- filter->fo_dentry_O_groups = new_groups;
- filter->fo_last_objid_files = new_files;
- filter->fo_group_count = len;
- }
-
- filter->fo_dentry_O_groups[group] = dentry;
- filter->fo_last_objid_files[group] = filp;
- if (filter->fo_subdir_count && fid_seq_is_mdt(group)) {
- filter->fo_dentry_O_sub[group] = *tmp_subdirs;
- OBD_FREE(tmp_subdirs, sizeof(*tmp_subdirs));
- }
-
- filter_update_last_group(obd, group);
-
- if (i_size_read(filp->f_dentry->d_inode) == 0) {
- filter->fo_last_objids[group] = FILTER_INIT_OBJID;
- rc = filter_update_last_objid(obd, group, 1);
- RETURN(rc);
- }
-
- filter->fo_last_objids[group] = le64_to_cpu(last_objid);
- CDEBUG(D_INODE, "%s: server last_objid group %d: "LPU64"\n",
- obd->obd_name, group, last_objid);
- RETURN(0);
- cleanup:
- switch (stage) {
- case 4:
- if (new_objids != NULL)
- OBD_FREE(new_objids, len * sizeof(*new_objids));
- if (new_subdirs != NULL)
- OBD_FREE(new_subdirs, len * sizeof(*new_subdirs));
- if (new_groups != NULL)
- OBD_FREE(new_groups, len * sizeof(*new_groups));
- if (new_files != NULL)
- OBD_FREE(new_files, len * sizeof(*new_files));
- case 3:
- if (filter->fo_subdir_count && fid_seq_is_mdt(group)) {
- for (i = 0; i < filter->fo_subdir_count; i++) {
- if (tmp_subdirs->dentry[i] != NULL)
- dput(tmp_subdirs->dentry[i]);
- }
- OBD_FREE(tmp_subdirs, sizeof(*tmp_subdirs));
- }
- case 2:
- filp_close(filp, 0);
- case 1:
- dput(dentry);
- }
- RETURN(rc);
-}
-
-static int filter_read_groups(struct obd_device *obd, int last_group,
- int create)
-{
- struct filter_obd *filter = &obd->u.filter;
- int old_count, group, rc = 0;
-
- cfs_mutex_lock(&filter->fo_init_lock);
- old_count = filter->fo_group_count;
- for (group = old_count; group <= last_group; group++) {
- rc = filter_read_group_internal(obd, group, create);
- if (rc != 0)
- break;
- }
- cfs_mutex_unlock(&filter->fo_init_lock);
- return rc;
-}
-
-/* FIXME: object groups */
-static int filter_prep_groups(struct obd_device *obd)
-{
- struct filter_obd *filter = &obd->u.filter;
- struct dentry *O_dentry;
- struct file *filp;
- int last_group, rc = 0, cleanup_phase = 0;
- loff_t off = 0;
- ENTRY;
-
- O_dentry = simple_mkdir(cfs_fs_pwd(current->fs), obd->u.obt.obt_vfsmnt,
- "O", 0700, 1);
- CDEBUG(D_INODE, "%s: got/created O: %p\n", obd->obd_name, O_dentry);
- if (IS_ERR(O_dentry)) {
- rc = PTR_ERR(O_dentry);
- CERROR("%s: cannot open/create O: rc = %d\n", obd->obd_name,rc);
- GOTO(cleanup, rc);
- }
- filter->fo_dentry_O = O_dentry;
- cleanup_phase = 1; /* O_dentry */
-
- /* we have to initialize all groups before first connections from
- * clients because they may send create/destroy for any group -bzzz */
- filp = filp_open("LAST_GROUP", O_CREAT | O_RDWR, 0700);
- if (IS_ERR(filp)) {
- CERROR("%s: cannot create LAST_GROUP: rc = %ld\n",
- obd->obd_name, PTR_ERR(filp));
- GOTO(cleanup, rc = PTR_ERR(filp));
- }
- cleanup_phase = 2; /* filp */
-
- rc = fsfilt_read_record(obd, filp, &last_group, sizeof(__u32), &off);
- if (rc) {
- CERROR("%s: error reading LAST_GROUP: rc %d\n",
- obd->obd_name, rc);
- GOTO(cleanup, rc);
- }
-
- if (off == 0)
- last_group = FID_SEQ_OST_MDT0;
-
- CDEBUG(D_INODE, "%s: initialize group %u (max %u)\n", obd->obd_name,
- FID_SEQ_OST_MDT0, last_group);
- filter->fo_committed_group = last_group;
- rc = filter_read_groups(obd, last_group, 1);
- if (rc)
- GOTO(cleanup, rc);
-
- filp_close(filp, 0);
- RETURN(0);
-
- cleanup:
- switch (cleanup_phase) {
- case 2:
- filp_close(filp, 0);
- case 1:
- filter_cleanup_groups(obd);
- f_dput(filter->fo_dentry_O);
- filter->fo_dentry_O = NULL;
- default:
- break;
- }
- return rc;
-
-}
-
-/* setup the object store with correct subdirectories */
-static int filter_prep(struct obd_device *obd)
-{
- struct lvfs_run_ctxt saved;
- struct filter_obd *filter = &obd->u.filter;
- struct file *file;
- struct inode *inode;
- int rc = 0;
- ENTRY;
-
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- file = filp_open(LAST_RCVD, O_RDWR | O_CREAT | O_LARGEFILE, 0700);
- if (!file || IS_ERR(file)) {
- rc = PTR_ERR(file);
- CERROR("OBD filter: cannot open/create %s: rc = %d\n",
- LAST_RCVD, rc);
- GOTO(out, rc);
- }
- obd->u.obt.obt_rcvd_filp = file;
- if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
- CERROR("%s is not a regular file!: mode = %o\n", LAST_RCVD,
- file->f_dentry->d_inode->i_mode);
- GOTO(err_filp, rc = -ENOENT);
- }
-
- inode = file->f_dentry->d_parent->d_inode;
- /* We use i_op->unlink directly in filter_vfs_unlink() */
- if (!inode->i_op || !inode->i_op->create || !inode->i_op->unlink) {
- CERROR("%s: filesystem does not support create/unlink ops\n",
- obd->obd_name);
- GOTO(err_filp, rc = -EOPNOTSUPP);
- }
-
- rc = filter_init_server_data(obd, file);
- if (rc) {
- CERROR("cannot read %s: rc = %d\n", LAST_RCVD, rc);
- GOTO(err_filp, rc);
- }
- LASSERT(obd->u.obt.obt_lut);
- target_recovery_init(obd->u.obt.obt_lut, ost_handle);
-
- /* open and create health check io file*/
- file = filp_open(HEALTH_CHECK, O_RDWR | O_CREAT, 0644);
- if (IS_ERR(file)) {
- rc = PTR_ERR(file);
- CERROR("OBD filter: cannot open/create %s rc = %d\n",
- HEALTH_CHECK, rc);
- GOTO(err_server_data, rc);
- }
- filter->fo_obt.obt_health_check_filp = file;
- if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
- CERROR("%s is not a regular file!: mode = %o\n", HEALTH_CHECK,
- file->f_dentry->d_inode->i_mode);
- GOTO(err_health_check, rc = -ENOENT);
- }
- rc = lvfs_check_io_health(obd, file);
- if (rc)
- GOTO(err_health_check, rc);
-
- rc = filter_prep_groups(obd);
- if (rc)
- GOTO(err_health_check, rc);
-out:
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
-
- return(rc);
-
-err_health_check:
- if (filp_close(filter->fo_obt.obt_health_check_filp, 0))
- CERROR("can't close %s after error\n", HEALTH_CHECK);
- filter->fo_obt.obt_health_check_filp = NULL;
-err_server_data:
- target_recovery_fini(obd);
- filter_free_server_data(&obd->u.obt);
-err_filp:
- if (filp_close(obd->u.obt.obt_rcvd_filp, 0))
- CERROR("can't close %s after error\n", LAST_RCVD);
- obd->u.obt.obt_rcvd_filp = NULL;
- goto out;
-}
-
-/* cleanup the filter: write last used object id to status file */
-static void filter_post(struct obd_device *obd)
-{
- struct lvfs_run_ctxt saved;
- struct filter_obd *filter = &obd->u.filter;
- int rc, i;
-
- /* XXX: filter_update_lastobjid used to call fsync_dev. It might be
- * best to start a transaction with h_sync, because we removed this
- * from lastobjid */
-
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- rc = filter_update_server_data(obd);
- if (rc)
- CERROR("error writing server data: rc = %d\n", rc);
-
- for (i = 0; i < filter->fo_group_count; i++) {
- rc = filter_update_last_objid(obd, i,
- (i == filter->fo_group_count - 1));
- if (rc)
- CERROR("error writing group %d lastobjid: rc = %d\n",
- i, rc);
- }
-
- rc = filp_close(obd->u.obt.obt_rcvd_filp, 0);
- obd->u.obt.obt_rcvd_filp = NULL;
- if (rc)
- CERROR("error closing %s: rc = %d\n", LAST_RCVD, rc);
-
- rc = filp_close(filter->fo_obt.obt_health_check_filp, 0);
- filter->fo_obt.obt_health_check_filp = NULL;
- if (rc)
- CERROR("error closing %s: rc = %d\n", HEALTH_CHECK, rc);
-
- filter_cleanup_groups(obd);
- filter_free_server_data(&obd->u.obt);
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
-
- filter_free_capa_keys(filter);
- cleanup_capa_hash(filter->fo_capa_hash);
-}
-
-static void filter_set_last_id(struct filter_obd *filter,
- obd_id id, obd_seq group)
-{
- LASSERT(group <= filter->fo_group_count);
-
- cfs_spin_lock(&filter->fo_objidlock);
- filter->fo_last_objids[group] = id;
- cfs_spin_unlock(&filter->fo_objidlock);
-}
-
-obd_id filter_last_id(struct filter_obd *filter, obd_seq group)
-{
- obd_id id;
- LASSERT(group <= filter->fo_group_count);
- LASSERT(filter->fo_last_objids != NULL);
-
- /* FIXME: object groups */
- cfs_spin_lock(&filter->fo_objidlock);
- id = filter->fo_last_objids[group];
- cfs_spin_unlock(&filter->fo_objidlock);
- return id;
-}
-
-static int filter_lock_dentry(struct obd_device *obd, struct dentry *dparent)
-{
- mutex_lock_nested(&dparent->d_inode->i_mutex, I_MUTEX_PARENT);
- return 0;
-}
-
-/* We never dget the object parent, so DON'T dput it either */
-struct dentry *filter_parent(struct obd_device *obd, obd_seq group, obd_id objid)
-{
- struct filter_obd *filter = &obd->u.filter;
- struct filter_subdirs *subdirs;
-
- if (group >= filter->fo_group_count) /* FIXME: object groups */
- return ERR_PTR(-EBADF);
-
- if (!fid_seq_is_mdt(group) || filter->fo_subdir_count == 0)
- return filter->fo_dentry_O_groups[group];
-
- subdirs = &filter->fo_dentry_O_sub[group];
- return subdirs->dentry[objid & (filter->fo_subdir_count - 1)];
-}
-
-/* We never dget the object parent, so DON'T dput it either */
-struct dentry *filter_parent_lock(struct obd_device *obd, obd_seq group,
- obd_id objid)
-{
- unsigned long now = jiffies;
- struct dentry *dparent = filter_parent(obd, group, objid);
- int rc;
-
- if (IS_ERR(dparent))
- return dparent;
- if (dparent == NULL)
- return ERR_PTR(-ENOENT);
-
- rc = filter_lock_dentry(obd, dparent);
- fsfilt_check_slow(obd, now, "parent lock");
- return rc ? ERR_PTR(rc) : dparent;
-}
-
-/* We never dget the object parent, so DON'T dput it either */
-static void filter_parent_unlock(struct dentry *dparent)
-{
- mutex_unlock(&dparent->d_inode->i_mutex);
-}
-
-/* How to get files, dentries, inodes from object id's.
- *
- * If dir_dentry is passed, the caller has already locked the parent
- * appropriately for this operation (normally a write lock). If
- * dir_dentry is NULL, we do a read lock while we do the lookup to
- * avoid races with create/destroy and such changing the directory
- * internal to the filesystem code. */
-struct dentry *filter_fid2dentry(struct obd_device *obd,
- struct dentry *dir_dentry,
- obd_seq group, obd_id id)
-{
- struct dentry *dparent = dir_dentry;
- struct dentry *dchild;
- char name[32];
- int len;
- ENTRY;
-
- if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT) &&
- obd->u.filter.fo_destroys_in_progress == 0) {
- /* don't fail lookups for orphan recovery, it causes
- * later LBUGs when objects still exist during precreate */
- CDEBUG(D_INFO, "*** cfs_fail_loc=%x ***\n",OBD_FAIL_OST_ENOENT);
- RETURN(ERR_PTR(-ENOENT));
- }
- if (id == 0) {
- CERROR("fatal: invalid object id 0\n");
- RETURN(ERR_PTR(-ESTALE));
- }
-
- len = sprintf(name, LPU64, id);
- if (dir_dentry == NULL) {
- dparent = filter_parent_lock(obd, group, id);
- if (IS_ERR(dparent)) {
- CERROR("%s: error getting object "POSTID
- " parent: rc %ld\n", obd->obd_name,
- id, group, PTR_ERR(dparent));
- RETURN(dparent);
- }
- }
- CDEBUG(D_INODE, "looking up object O/%.*s/%s\n",
- dparent->d_name.len, dparent->d_name.name, name);
- /* dparent is already locked here, so we cannot use ll_lookup_one_len() */
- dchild = lookup_one_len(name, dparent, len);
- if (dir_dentry == NULL)
- filter_parent_unlock(dparent);
- if (IS_ERR(dchild)) {
- CERROR("%s: object "LPU64":"LPU64" lookup error: rc %ld\n",
- obd->obd_name, id, group, PTR_ERR(dchild));
- RETURN(dchild);
- }
-
- if (dchild->d_inode != NULL && is_bad_inode(dchild->d_inode)) {
- CERROR("%s: got bad object "LPU64" inode %lu\n",
- obd->obd_name, id, dchild->d_inode->i_ino);
- f_dput(dchild);
- RETURN(ERR_PTR(-ENOENT));
- }
-
- CDEBUG(D_INODE, "got child objid %s: %p, count = %d\n",
- name, dchild, atomic_read(&dchild->d_count));
-
- LASSERT(atomic_read(&dchild->d_count) > 0);
-
- RETURN(dchild);
-}
-
-static int filter_prepare_destroy(struct obd_device *obd, obd_id objid,
- obd_id group, struct lustre_handle *lockh)
-{
- int flags = LDLM_AST_DISCARD_DATA, rc;
- struct ldlm_res_id res_id;
- ldlm_policy_data_t policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
- ENTRY;
-
- osc_build_res_name(objid, group, &res_id);
- /* Tell the clients that the object is gone now and that they should
- * throw away any cached pages. */
- rc = ldlm_cli_enqueue_local(obd->obd_namespace, &res_id, LDLM_EXTENT,
- &policy, LCK_PW, &flags, ldlm_blocking_ast,
- ldlm_completion_ast, NULL, NULL, 0, NULL,
- lockh);
- if (rc != ELDLM_OK)
- lockh->cookie = 0;
- RETURN(rc);
-}
-
-static void filter_fini_destroy(struct obd_device *obd,
- struct lustre_handle *lockh)
-{
- if (lustre_handle_is_used(lockh))
- ldlm_lock_decref(lockh, LCK_PW);
-}
-
-/* This is vfs_unlink() without down(i_sem). If we call regular vfs_unlink()
- * we have 2.6 lock ordering issues with filter_commitrw_write() as it takes
- * i_sem before starting a handle, while filter_destroy() + vfs_unlink do the
- * reverse. Caller must take i_sem before starting the transaction and we
- * drop it here before the inode is removed from the dentry. bug 4180/6984 */
-int filter_vfs_unlink(struct inode *dir, struct dentry *dentry,
- struct vfsmount *mnt)
-{
- int rc;
- ENTRY;
-
- /* don't need dir->i_zombie for 2.4, it is for rename/unlink of dir
- * itself we already hold dir->i_mutex for child create/unlink ops */
- LASSERT(dentry->d_inode != NULL);
- LASSERT(mutex_trylock(&dir->i_mutex) == 0);
- LASSERT(mutex_trylock(&dentry->d_inode->i_mutex) == 0);
-
-
- /* may_delete() */
- if (/*!dentry->d_inode ||*/dentry->d_parent->d_inode != dir)
- GOTO(out, rc = -ENOENT);
-
- rc = ll_permission(dir, MAY_WRITE | MAY_EXEC, NULL);
- if (rc)
- GOTO(out, rc);
-
- if (IS_APPEND(dir))
- GOTO(out, rc = -EPERM);
-
- /* check_sticky() */
- if ((dentry->d_inode->i_uid != cfs_curproc_fsuid() &&
- !cfs_capable(CFS_CAP_FOWNER)) || IS_APPEND(dentry->d_inode) ||
- IS_IMMUTABLE(dentry->d_inode))
- GOTO(out, rc = -EPERM);
-
- /* Locking order: i_mutex -> journal_lock -> dqptr_sem. LU-952 */
- ll_vfs_dq_init(dir);
-
- rc = ll_security_inode_unlink(dir, dentry, mnt);
- if (rc)
- GOTO(out, rc);
-
- rc = dir->i_op->unlink(dir, dentry);
-out:
- /* need to drop i_mutex before we lose inode reference */
- mutex_unlock(&dentry->d_inode->i_mutex);
- if (rc == 0)
- d_delete(dentry);
-
- RETURN(rc);
-}
-
-/* Caller must hold LCK_PW on parent and push us into kernel context.
- * Caller must hold child i_mutex, we drop it always.
- * Caller is also required to ensure that dchild->d_inode exists. */
-static int filter_destroy_internal(struct obd_device *obd, obd_id objid,
- obd_seq group, struct dentry *dparent,
- struct dentry *dchild)
-{
- struct inode *inode = dchild->d_inode;
- int rc;
-
- /* There should be 2 references to the inode:
- * 1) taken by filter_prepare_destroy
- * 2) taken by filter_destroy */
- if (inode->i_nlink != 1 || atomic_read(&inode->i_count) != 2) {
- CERROR("destroying objid %.*s ino %lu nlink %lu count %d\n",
- dchild->d_name.len, dchild->d_name.name, inode->i_ino,
- (unsigned long)inode->i_nlink,
- atomic_read(&inode->i_count));
- }
-
- rc = filter_vfs_unlink(dparent->d_inode, dchild, obd->u.obt.obt_vfsmnt);
- if (rc)
- CERROR("error unlinking objid %.*s: rc %d\n",
- dchild->d_name.len, dchild->d_name.name, rc);
- return(rc);
-}
-
-struct filter_intent_args {
- struct ldlm_lock **victim;
- __u64 size;
- int *liblustre;
-};
-
-static enum interval_iter filter_intent_cb(struct interval_node *n,
- void *args)
-{
- struct ldlm_interval *node = (struct ldlm_interval *)n;
- struct filter_intent_args *arg = (struct filter_intent_args*)args;
- __u64 size = arg->size;
- struct ldlm_lock **v = arg->victim;
- struct ldlm_lock *lck;
-
- /* If the interval is lower than the current file size,
- * just break. */
- if (interval_high(n) <= size)
- return INTERVAL_ITER_STOP;
-
- cfs_list_for_each_entry(lck, &node->li_group, l_sl_policy) {
- /* Don't send glimpse ASTs to liblustre clients.
- * They aren't listening for them, and they do
- * entirely synchronous I/O anyways. */
- if (lck->l_export == NULL ||
- lck->l_export->exp_libclient == 1)
- continue;
-
- if (*arg->liblustre)
- *arg->liblustre = 0;
-
- if (*v == NULL) {
- *v = LDLM_LOCK_GET(lck);
- } else if ((*v)->l_policy_data.l_extent.start <
- lck->l_policy_data.l_extent.start) {
- LDLM_LOCK_RELEASE(*v);
- *v = LDLM_LOCK_GET(lck);
- }
-
- /* the same policy group - every lock has the
- * same extent, so needn't do it any more */
- break;
- }
-
- return INTERVAL_ITER_CONT;
-}
-
-static int filter_intent_policy(struct ldlm_namespace *ns,
- struct ldlm_lock **lockp, void *req_cookie,
- ldlm_mode_t mode, int flags, void *data)
-{
- struct ptlrpc_request *req = req_cookie;
- struct ldlm_lock *lock = *lockp, *l = NULL;
- struct ldlm_resource *res = lock->l_resource;
- ldlm_processing_policy policy;
- struct ost_lvb *res_lvb, *reply_lvb;
- struct ldlm_reply *rep;
- ldlm_error_t err;
- int idx, rc, tmpflags = 0, only_liblustre = 1;
- struct ldlm_interval_tree *tree;
- struct filter_intent_args arg;
- __u32 repsize[3] = { [MSG_PTLRPC_BODY_OFF] = sizeof(struct ptlrpc_body),
- [DLM_LOCKREPLY_OFF] = sizeof(*rep),
- [DLM_REPLY_REC_OFF] = sizeof(*reply_lvb) };
- struct ldlm_glimpse_work gl_work;
- CFS_LIST_HEAD(gl_list);
- ENTRY;
-
- policy = ldlm_get_processing_policy(res);
- LASSERT(policy != NULL);
- LASSERT(req != NULL);
-
- rc = lustre_pack_reply(req, 3, repsize, NULL);
- if (rc)
- RETURN(req->rq_status = rc);
-
- rep = lustre_msg_buf(req->rq_repmsg, DLM_LOCKREPLY_OFF, sizeof(*rep));
- LASSERT(rep != NULL);
-
- reply_lvb = lustre_msg_buf(req->rq_repmsg, DLM_REPLY_REC_OFF,
- sizeof(*reply_lvb));
- LASSERT(reply_lvb != NULL);
-
- //fixup_handle_for_resent_req(req, lock, &lockh);
-
- /* Call the extent policy function to see if our request can be
- * granted, or is blocked.
- * If the OST lock has LDLM_FL_HAS_INTENT set, it means a glimpse
- * lock, and should not be granted if the lock will be blocked.
- */
-
- if (flags & LDLM_FL_BLOCK_NOWAIT) {
- OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_AGL_DELAY, 5);
-
- if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_AGL_NOLOCK))
- RETURN(ELDLM_LOCK_ABORTED);
- }
-
- LASSERT(ns == ldlm_res_to_ns(res));
- lock_res(res);
- rc = policy(lock, &tmpflags, 0, &err, NULL);
- check_res_locked(res);
-
- /* The lock met with no resistance; we're finished. */
- if (rc == LDLM_ITER_CONTINUE) {
- /* do not grant locks to the liblustre clients: they cannot
- * handle ASTs robustly. We need to do this while still
- * holding lr_lock to avoid the lock remaining on the res_link
- * list (and potentially being added to l_pending_list by an
- * AST) when we are going to drop this lock ASAP. */
- if (lock->l_export->exp_libclient ||
- OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_GLIMPSE, 2)) {
- ldlm_resource_unlink_lock(lock);
- err = ELDLM_LOCK_ABORTED;
- } else {
- err = ELDLM_LOCK_REPLACED;
- }
- unlock_res(res);
- RETURN(err);
- } else if (flags & LDLM_FL_BLOCK_NOWAIT) {
- /* LDLM_FL_BLOCK_NOWAIT means it is for AGL. Do not send glimpse
- * callback for glimpse size. The real size user will trigger
- * the glimpse callback when necessary. */
- unlock_res(res);
- RETURN(ELDLM_LOCK_ABORTED);
- }
-
- /* Do not grant any lock, but instead send GL callbacks. The extent
- * policy nicely created a list of all PW locks for us. We will choose
- * the highest of those which are larger than the size in the LVB, if
- * any, and perform a glimpse callback. */
- res_lvb = res->lr_lvb_data;
- LASSERT(res_lvb != NULL);
- *reply_lvb = *res_lvb;
-
- /*
- * lr_lock guarantees that no new locks are granted, and,
- * therefore, that res->lr_lvb_data cannot increase beyond the
- * end of already granted lock. As a result, it is safe to
- * check against "stale" reply_lvb->lvb_size value without
- * res->lr_lvb_mutex.
- */
- arg.size = reply_lvb->lvb_size;
- arg.victim = &l;
- arg.liblustre = &only_liblustre;
- for (idx = 0; idx < LCK_MODE_NUM; idx++) {
- tree = &res->lr_itree[idx];
- if (tree->lit_mode == LCK_PR)
- continue;
-
- interval_iterate_reverse(tree->lit_root,
- filter_intent_cb, &arg);
- }
- unlock_res(res);
-
- /* There were no PW locks beyond the size in the LVB; finished. */
- if (l == NULL) {
- if (only_liblustre) {
- /* If we discovered a liblustre client with a PW lock,
- * however, the LVB may be out of date! The LVB is
- * updated only on glimpse (which we don't do for
- * liblustre clients) and cancel (which the client
- * obviously has not yet done). So if it has written
- * data but kept the lock, the LVB is stale and needs
- * to be updated from disk.
- *
- * Of course, this will all disappear when we switch to
- * taking liblustre locks on the OST. */
- ldlm_res_lvbo_update(res, NULL, 1);
- }
- RETURN(ELDLM_LOCK_ABORTED);
- }
-
- /*
- * This check is for lock taken in filter_prepare_destroy() that does
- * not have l_glimpse_ast set. So the logic is: if there is a lock
- * with no l_glimpse_ast set, this object is being destroyed already.
- *
- * Hence, if you are grabbing DLM locks on the server, always set
- * non-NULL glimpse_ast (e.g., ldlm_request.c:ldlm_glimpse_ast()).
- */
- if (l->l_glimpse_ast == NULL) {
- /* We are racing with unlink(); just return -ENOENT */
- rep->lock_policy_res1 = -ENOENT;
- goto out;
- }
-
- LASSERTF(l->l_glimpse_ast != NULL, "l == %p", l);
-
- /* Populate the gl_work structure.
- * Grab additional reference on the lock which will be released in
- * ldlm_work_gl_ast_lock() */
- gl_work.gl_lock = LDLM_LOCK_GET(l);
- /* The glimpse callback is sent to one single extent lock. As a result,
- * the gl_work list is just composed of one element */
- cfs_list_add_tail(&gl_work.gl_list, &gl_list);
- /* There is actually no need for a glimpse descriptor when glimpsing
- * extent locks */
- gl_work.gl_desc = NULL;
- /* the ldlm_glimpse_work structure is allocated on the stack */
- gl_work.gl_flags = LDLM_GL_WORK_NOFREE;
-
- rc = ldlm_glimpse_locks(res, &gl_list); /* this will update the LVB */
-
- if (!cfs_list_empty(&gl_list))
- LDLM_LOCK_RELEASE(l);
-
- lock_res(res);
- *reply_lvb = *res_lvb;
- unlock_res(res);
-
- out:
- LDLM_LOCK_RELEASE(l);
-
- RETURN(ELDLM_LOCK_ABORTED);
-}
-
-/*
- * per-obd_device iobuf pool.
- *
- * To avoid memory deadlocks in low-memory setups, amount of dynamic
- * allocations in write-path has to be minimized (see bug 5137).
- *
- * Pages, niobuf_local's and niobuf_remote's are pre-allocated and attached to
- * OST threads (see ost_thread_{init,done}()).
- *
- * "iobuf's" used by filter cannot be attached to OST thread, however, because
- * at the OST layer there are only (potentially) multiple obd_device of type
- * unknown at the time of OST thread creation.
- *
- * We create a cfs_hash for struct filter_obd (->fo_iobuf_hash field) on
- * initializing, each OST thread will create it's own iobuf on the first
- * access and insert it into ->fo_iobuf_hash with thread ID as key,
- * so the iobuf can be found again by thread ID.
- *
- * Functions below
- *
- * filter_iobuf_pool_init()
- *
- * filter_iobuf_pool_done()
- *
- * filter_iobuf_get()
- *
- * operate on this array. They are "generic" in a sense that they don't depend
- * on actual type of iobuf's (the latter depending on Linux kernel version).
- */
-
-/*
- * destroy pool created by filter_iobuf_pool_init
- */
-static void filter_iobuf_pool_done(struct filter_obd *filter)
-{
- ENTRY;
-
- if (filter->fo_iobuf_hash != NULL) {
- cfs_hash_putref(filter->fo_iobuf_hash);
- filter->fo_iobuf_hash = NULL;
- }
- EXIT;
-}
-
-static int filter_adapt_sptlrpc_conf(struct obd_device *obd, int initial)
-{
- struct filter_obd *filter = &obd->u.filter;
- struct sptlrpc_rule_set tmp_rset;
- int rc;
-
- sptlrpc_rule_set_init(&tmp_rset);
- rc = sptlrpc_conf_target_get_rules(obd, &tmp_rset, initial);
- if (rc) {
- CERROR("obd %s: failed get sptlrpc rules: %d\n",
- obd->obd_name, rc);
- return rc;
- }
-
- sptlrpc_target_update_exp_flavor(obd, &tmp_rset);
-
- cfs_write_lock(&filter->fo_sptlrpc_lock);
- sptlrpc_rule_set_free(&filter->fo_sptlrpc_rset);
- filter->fo_sptlrpc_rset = tmp_rset;
- cfs_write_unlock(&filter->fo_sptlrpc_lock);
-
- return 0;
-}
-
-static unsigned
-filter_iobuf_hop_hash(cfs_hash_t *hs, const void *key, unsigned mask)
-{
- __u64 val = *((__u64 *)key);
-
- return cfs_hash_long(val, hs->hs_cur_bits);
-}
-
-static void *
-filter_iobuf_hop_key(cfs_hlist_node_t *hnode)
-{
- struct filter_iobuf *pool;
-
- pool = cfs_hlist_entry(hnode, struct filter_iobuf, dr_hlist);
- return &pool->dr_hkey;
-}
-
-static int
-filter_iobuf_hop_keycmp(const void *key, cfs_hlist_node_t *hnode)
-{
- struct filter_iobuf *pool;
-
- pool = cfs_hlist_entry(hnode, struct filter_iobuf, dr_hlist);
- return pool->dr_hkey == *((__u64 *)key);
-}
-
-static void *
-filter_iobuf_hop_object(cfs_hlist_node_t *hnode)
-{
- return cfs_hlist_entry(hnode, struct filter_iobuf, dr_hlist);
-}
-
-static void
-filter_iobuf_hop_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
-{
- /* dummy, required by cfs_hash */
-}
-
-static void
-filter_iobuf_hop_put_locked(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
-{
- /* dummy, required by cfs_hash */
-}
-
-static void
-filter_iobuf_hop_exit(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
-{
- struct filter_iobuf *pool;
-
- pool = cfs_hlist_entry(hnode, struct filter_iobuf, dr_hlist);
- filter_free_iobuf(pool);
-}
-
-static struct cfs_hash_ops filter_iobuf_hops = {
- .hs_hash = filter_iobuf_hop_hash,
- .hs_key = filter_iobuf_hop_key,
- .hs_keycmp = filter_iobuf_hop_keycmp,
- .hs_object = filter_iobuf_hop_object,
- .hs_get = filter_iobuf_hop_get,
- .hs_put_locked = filter_iobuf_hop_put_locked,
- .hs_exit = filter_iobuf_hop_exit
-};
-
-#define FILTER_IOBUF_HASH_BITS 9
-#define FILTER_IOBUF_HBKT_BITS 4
-
-/*
- * pre-allocate pool of iobuf's to be used by filter_{prep,commit}rw_write().
- */
-static int filter_iobuf_pool_init(struct filter_obd *filter)
-{
- filter->fo_iobuf_hash = cfs_hash_create("filter_iobuf",
- FILTER_IOBUF_HASH_BITS,
- FILTER_IOBUF_HASH_BITS,
- FILTER_IOBUF_HBKT_BITS, 0,
- CFS_HASH_MIN_THETA,
- CFS_HASH_MAX_THETA,
- &filter_iobuf_hops,
- CFS_HASH_RW_BKTLOCK |
- CFS_HASH_NO_ITEMREF);
-
- return filter->fo_iobuf_hash != NULL ? 0 : -ENOMEM;
-}
-
-/* Return iobuf allocated for @thread_id.
- * If we haven't allocated a pool entry for this thread before, do so now and
- * insert it into fo_iobuf_hash, otherwise we can find it from fo_iobuf_hash */
-void *filter_iobuf_get(struct filter_obd *filter, struct obd_trans_info *oti)
-{
- struct filter_iobuf *pool = NULL;
- __u64 key = 0;
- int thread_id;
- int rc;
-
- thread_id = (oti && oti->oti_thread) ? oti->oti_thread->t_id : -1;
- if (thread_id >= 0) {
- struct ptlrpc_service_part *svcpt;
-
- svcpt = oti->oti_thread->t_svcpt;
- LASSERT(svcpt != NULL);
-
- key = (__u64)(svcpt->scp_cpt) << 32 | thread_id;
- pool = cfs_hash_lookup(filter->fo_iobuf_hash, &key);
- if (pool != NULL)
- return pool;
- }
-
- pool = filter_alloc_iobuf(filter, OBD_BRW_WRITE, PTLRPC_MAX_BRW_PAGES);
- if (pool == NULL)
- return NULL;
-
- if (thread_id >= 0) {
- pool->dr_hkey = key;
- rc = cfs_hash_add_unique(filter->fo_iobuf_hash,
- &key, &pool->dr_hlist);
- /* ptlrpc service thould guarantee thread ID is unique */
- LASSERT(rc != -EALREADY);
- }
-
- return pool;
-}
-
-/* mount the file system (secretly). lustre_cfg parameters are:
- * 1 = device
- * 2 = fstype
- * 3 = flags: failover=f, failout=n
- * 4 = mount options
- */
-int filter_common_setup(struct obd_device *obd, struct lustre_cfg* lcfg,
- void *option)
-{
- struct filter_obd *filter = &obd->u.filter;
- struct vfsmount *mnt;
- struct file_system_type *type;
- struct lustre_mount_info *lmi;
- struct obd_uuid uuid;
- __u8 *uuid_ptr;
- char *str, *label;
- char ns_name[48];
- struct request_queue *q;
- int rc, i;
- ENTRY;
-
- if (lcfg->lcfg_bufcount < 3 ||
- LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
- LUSTRE_CFG_BUFLEN(lcfg, 2) < 1)
- RETURN(-EINVAL);
-
- lmi = server_get_mount(obd->obd_name);
- if (lmi) {
- /* We already mounted in lustre_fill_super.
- lcfg bufs 1, 2, 4 (device, fstype, mount opts) are ignored.*/
- struct lustre_sb_info *lsi = s2lsi(lmi->lmi_sb);
- mnt = lmi->lmi_mnt;
- obd->obd_fsops = fsfilt_get_ops(lsi->lsi_fstype);
- } else {
- /* old path - used by lctl */
- CERROR("Using old MDS mount method\n");
- type = get_fs_type(lustre_cfg_string(lcfg, 2));
- if (!type) {
- CERROR("get_fs_type failed\n");
- RETURN(-ENODEV);
- }
- mnt = vfs_kern_mount(type, MS_NOATIME|MS_NODIRATIME,
- lustre_cfg_string(lcfg, 1), option);
- cfs_module_put(type->owner);
- if (IS_ERR(mnt)) {
- rc = PTR_ERR(mnt);
- LCONSOLE_ERROR_MSG(0x135, "Can't mount disk %s (%d)\n",
- lustre_cfg_string(lcfg, 1), rc);
- RETURN(rc);
- }
-
- obd->obd_fsops = fsfilt_get_ops(lustre_cfg_string(lcfg, 2));
- }
- if (IS_ERR(obd->obd_fsops))
- GOTO(err_mntput, rc = PTR_ERR(obd->obd_fsops));
-
- rc = filter_iobuf_pool_init(filter);
- if (rc != 0)
- GOTO(err_ops, rc);
-
- if (lvfs_check_rdonly(lvfs_sbdev(mnt->mnt_sb))) {
- CERROR("%s: Underlying device is marked as read-only. "
- "Setup failed\n", obd->obd_name);
- GOTO(err_ops, rc = -EROFS);
- }
-
- /* failover is the default */
- obd->obd_replayable = 1;
-
- /* disable connection until configuration finishes */
- obd->obd_no_conn = 1;
-
- if (lcfg->lcfg_bufcount > 3 && LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
- str = lustre_cfg_string(lcfg, 3);
- if (strchr(str, 'n')) {
- CWARN("%s: recovery disabled\n", obd->obd_name);
- obd->obd_replayable = 0;
- }
- }
-
- obd->u.obt.obt_magic = OBT_MAGIC;
- obd->u.obt.obt_vfsmnt = mnt;
- obd->u.obt.obt_sb = mnt->mnt_sb;
- filter->fo_fstype = mnt->mnt_sb->s_type->name;
- CDEBUG(D_SUPER, "%s: mnt = %p\n", filter->fo_fstype, mnt);
-
- rc = fsfilt_setup(obd, obd->u.obt.obt_sb);
- if (rc)
- GOTO(err_ops, rc);
-
- OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
- obd->obd_lvfs_ctxt.pwdmnt = mnt;
- obd->obd_lvfs_ctxt.pwd = mnt->mnt_root;
- obd->obd_lvfs_ctxt.fs = get_ds();
- obd->obd_lvfs_ctxt.cb_ops = filter_lvfs_ops;
-
- cfs_mutex_init(&filter->fo_init_lock);
- filter->fo_committed_group = 0;
- filter->fo_destroys_in_progress = 0;
- for (i = 0; i < 32; i++)
- cfs_mutex_init(&filter->fo_create_locks[i]);
-
- cfs_spin_lock_init(&filter->fo_objidlock);
- CFS_INIT_LIST_HEAD(&filter->fo_export_list);
- cfs_mutex_init(&filter->fo_alloc_lock);
- init_brw_stats(&filter->fo_filter_stats);
- cfs_spin_lock_init(&filter->fo_flags_lock);
- filter->fo_read_cache = 1; /* enable read-only cache by default */
- filter->fo_writethrough_cache = 1; /* enable writethrough cache */
- filter->fo_readcache_max_filesize = FILTER_MAX_CACHE_SIZE;
- filter->fo_fmd_max_num = FILTER_FMD_MAX_NUM_DEFAULT;
- filter->fo_fmd_max_age = FILTER_FMD_MAX_AGE_DEFAULT;
- filter->fo_syncjournal = 0; /* Don't sync journals on i/o by default */
- filter_slc_set(filter); /* initialize sync on lock cancel */
-
- rc = filter_prep(obd);
- if (rc)
- GOTO(err_ops, rc);
-
- CFS_INIT_LIST_HEAD(&filter->fo_llog_list);
- cfs_spin_lock_init(&filter->fo_llog_list_lock);
-
- filter->fo_fl_oss_capa = 1;
-
- CFS_INIT_LIST_HEAD(&filter->fo_capa_keys);
- filter->fo_capa_hash = init_capa_hash();
- if (filter->fo_capa_hash == NULL)
- GOTO(err_post, rc = -ENOMEM);
-
- sprintf(ns_name, "filter-%s", obd->obd_uuid.uuid);
- obd->obd_namespace = ldlm_namespace_new(obd, ns_name,
- LDLM_NAMESPACE_SERVER,
- LDLM_NAMESPACE_GREEDY,
- LDLM_NS_TYPE_OST);
- if (obd->obd_namespace == NULL)
- GOTO(err_post, rc = -ENOMEM);
- obd->obd_namespace->ns_lvbp = obd;
- obd->obd_namespace->ns_lvbo = &filter_lvbo;
- ldlm_register_intent(obd->obd_namespace, filter_intent_policy);
-
- ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
- "filter_ldlm_cb_client", &obd->obd_ldlm_client);
-
- rc = obd_llog_init(obd, &obd->obd_olg, obd, NULL);
- if (rc) {
- CERROR("failed to setup llogging subsystems\n");
- GOTO(err_post, rc);
- }
-
- cfs_rwlock_init(&filter->fo_sptlrpc_lock);
- sptlrpc_rule_set_init(&filter->fo_sptlrpc_rset);
- /* do this after llog being initialized */
- filter_adapt_sptlrpc_conf(obd, 1);
-
- q = bdev_get_queue(mnt->mnt_sb->s_bdev);
- if (queue_max_sectors(q) < queue_max_hw_sectors(q) &&
- queue_max_sectors(q) < PTLRPC_MAX_BRW_SIZE >> 9)
- LCONSOLE_INFO("%s: underlying device %s should be tuned "
- "for larger I/O requests: max_sectors = %u "
- "could be up to max_hw_sectors=%u\n",
- obd->obd_name, mnt->mnt_sb->s_id,
- queue_max_sectors(q), queue_max_hw_sectors(q));
-
- uuid_ptr = fsfilt_uuid(obd, obd->u.obt.obt_sb);
- if (uuid_ptr != NULL) {
- class_uuid_unparse(uuid_ptr, &uuid);
- str = uuid.uuid;
- } else {
- str = "no UUID";
- }
-
- label = fsfilt_get_label(obd, obd->u.obt.obt_sb);
- LCONSOLE_INFO("%s: Now serving %s %s%s with recovery %s\n",
- obd->obd_name, label ?: str, lmi ? "on " : "",
- lmi ? s2lsi(lmi->lmi_sb)->lsi_lmd->lmd_dev : "",
- obd->obd_replayable ? "enabled" : "disabled");
-
- RETURN(0);
-
-err_post:
- filter_post(obd);
-err_ops:
- fsfilt_put_ops(obd->obd_fsops);
- filter_iobuf_pool_done(filter);
-err_mntput:
- server_put_mount(obd->obd_name, mnt);
- obd->u.obt.obt_sb = 0;
- return rc;
-}
-
-static int filter_setup(struct obd_device *obd, struct lustre_cfg* lcfg)
-{
- struct lprocfs_static_vars lvars;
- cfs_proc_dir_entry_t *entry;
- unsigned long addr;
- struct page *page;
- int rc;
- ENTRY;
-
- CLASSERT(offsetof(struct obd_device, u.obt) ==
- offsetof(struct obd_device, u.filter.fo_obt));
-
- if (!LUSTRE_CFG_BUFLEN(lcfg, 1) || !LUSTRE_CFG_BUFLEN(lcfg, 2))
- RETURN(-EINVAL);
-
- /* lprocfs must be setup before the filter so state can be safely added
- * to /proc incrementally as the filter is setup */
- lprocfs_filter_init_vars(&lvars);
- rc = lprocfs_obd_setup(obd, lvars.obd_vars);
- if (rc) {
- CERROR("%s: lprocfs_obd_setup failed: %d.\n",
- obd->obd_name, rc);
- RETURN(rc);
- }
-
- rc = lprocfs_alloc_obd_stats(obd, LPROC_FILTER_LAST);
- if (rc) {
- CERROR("%s: lprocfs_alloc_obd_stats failed: %d.\n",
- obd->obd_name, rc);
- GOTO(obd_cleanup, rc);
- }
-
- /* Init obdfilter private stats here */
- lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_READ_BYTES,
- LPROCFS_CNTR_AVGMINMAX, "read_bytes", "bytes");
- lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_WRITE_BYTES,
- LPROCFS_CNTR_AVGMINMAX, "write_bytes", "bytes");
- lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_GET_PAGE,
- LPROCFS_CNTR_AVGMINMAX|LPROCFS_CNTR_STDDEV,
- "get_page", "usec");
- lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_NO_PAGE,
- LPROCFS_CNTR_AVGMINMAX, "get_page_failures", "num");
- lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_CACHE_ACCESS,
- LPROCFS_CNTR_AVGMINMAX, "cache_access", "pages");
- lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_CACHE_HIT,
- LPROCFS_CNTR_AVGMINMAX, "cache_hit", "pages");
- lprocfs_counter_init(obd->obd_stats, LPROC_FILTER_CACHE_MISS,
- LPROCFS_CNTR_AVGMINMAX, "cache_miss", "pages");
-
- rc = lproc_filter_attach_seqstat(obd);
- if (rc) {
- CERROR("%s: create seqstat failed: %d.\n", obd->obd_name, rc);
- GOTO(free_obd_stats, rc);
- }
-
- entry = lprocfs_register("exports", obd->obd_proc_entry, NULL, NULL);
- if (IS_ERR(entry)) {
- rc = PTR_ERR(entry);
- CERROR("%s: error %d setting up lprocfs for %s\n",
- obd->obd_name, rc, "exports");
- GOTO(free_obd_stats, rc);
- }
- obd->obd_proc_exports_entry = entry;
-
- entry = lprocfs_add_simple(obd->obd_proc_exports_entry, "clear",
- lprocfs_nid_stats_clear_read,
- lprocfs_nid_stats_clear_write, obd, NULL);
- if (IS_ERR(entry)) {
- rc = PTR_ERR(entry);
- CERROR("%s: add proc entry 'clear' failed: %d.\n",
- obd->obd_name, rc);
- GOTO(free_obd_stats, rc);
- }
-
- rc = lprocfs_job_stats_init(obd, LPROC_FILTER_STATS_LAST,
- filter_stats_counter_init);
- if (rc)
- GOTO(remove_entry_clear, rc);
-
- /* 2.6.9 selinux wants a full option page for do_kern_mount (bug6471) */
- OBD_PAGE_ALLOC(page, CFS_ALLOC_STD);
- if (!page)
- GOTO(job_stats_fini, rc = -ENOMEM);
- addr = (unsigned long)cfs_page_address(page);
- clear_page((void *)addr);
- memcpy((void *)addr, lustre_cfg_buf(lcfg, 4),
- LUSTRE_CFG_BUFLEN(lcfg, 4));
- rc = filter_common_setup(obd, lcfg, (void *)addr);
- OBD_PAGE_FREE(page);
- if (rc) {
- CERROR("%s: filter_common_setup failed: %d.\n",
- obd->obd_name, rc);
- GOTO(job_stats_fini, rc);
- }
-
- RETURN(0);
-
-job_stats_fini:
- lprocfs_job_stats_fini(obd);
-remove_entry_clear:
- lprocfs_remove_proc_entry("clear", obd->obd_proc_exports_entry);
-free_obd_stats:
- lprocfs_free_obd_stats(obd);
-obd_cleanup:
- lprocfs_obd_cleanup(obd);
- return rc;
-}
-
-static struct llog_operations filter_mds_ost_repl_logops;
-
-static struct llog_operations filter_size_orig_logops = {};
-
-static int filter_olg_fini(struct obd_llog_group *olg)
-{
- struct llog_ctxt *ctxt;
-
- ENTRY;
-
- ctxt = llog_group_get_ctxt(olg, LLOG_MDS_OST_REPL_CTXT);
- if (ctxt)
- llog_cleanup(NULL, ctxt);
-
- ctxt = llog_group_get_ctxt(olg, LLOG_SIZE_ORIG_CTXT);
- if (ctxt)
- llog_cleanup(NULL, ctxt);
-
- ctxt = llog_group_get_ctxt(olg, LLOG_CONFIG_ORIG_CTXT);
- if (ctxt)
- llog_cleanup(NULL, ctxt);
-
- RETURN(0);
-}
-
-static int
-filter_olg_init(struct obd_device *obd, struct obd_llog_group *olg,
- struct obd_device *tgt)
-{
- struct llog_ctxt *ctxt = NULL;
- int rc;
-
- ENTRY;
-
- filter_mds_ost_repl_logops = llog_client_ops;
- filter_mds_ost_repl_logops.lop_cancel = llog_obd_repl_cancel;
- filter_mds_ost_repl_logops.lop_connect = llog_obd_repl_connect;
- filter_mds_ost_repl_logops.lop_sync = llog_obd_repl_sync;
-
- rc = llog_setup(NULL, obd, olg, LLOG_MDS_OST_REPL_CTXT, tgt,
- &filter_mds_ost_repl_logops);
- if (rc)
- RETURN(rc);
-
- rc = llog_setup(NULL, obd, olg, LLOG_SIZE_ORIG_CTXT, tgt,
- &filter_size_orig_logops);
- if (rc)
- GOTO(out, rc);
-
- RETURN(0);
-out:
- ctxt = llog_group_get_ctxt(olg, LLOG_MDS_OST_REPL_CTXT);
- llog_cleanup(NULL, ctxt);
- return rc;
-}
-
-/**
- * Init the default olg, which is embeded in the obd_device, for filter.
- */
-static int
-filter_default_olg_init(struct obd_device *obd, struct obd_llog_group *olg,
- struct obd_device *tgt)
-{
- struct filter_obd *filter = &obd->u.filter;
- struct llog_ctxt *ctxt;
- int rc;
- ENTRY;
-
- filter->fo_lcm = llog_recov_thread_init(obd->obd_name);
- if (!filter->fo_lcm)
- RETURN(-ENOMEM);
-
- rc = filter_olg_init(obd, olg, tgt);
- if (rc)
- GOTO(cleanup_lcm, rc);
-
- rc = llog_setup(NULL, obd, olg, LLOG_CONFIG_ORIG_CTXT, tgt,
- &llog_lvfs_ops);
- if (rc)
- GOTO(cleanup_olg, rc);
-
- ctxt = llog_group_get_ctxt(olg, LLOG_MDS_OST_REPL_CTXT);
- if (!ctxt) {
- CERROR("Can't get ctxt for %p:%x\n", olg,
- LLOG_MDS_OST_REPL_CTXT);
- GOTO(cleanup_olg, rc = -ENODEV);
- }
- ctxt->loc_lcm = lcm_get(filter->fo_lcm);
- ctxt->llog_proc_cb = filter_recov_log_mds_ost_cb;
- llog_ctxt_put(ctxt);
-
- RETURN(0);
-cleanup_olg:
- filter_olg_fini(olg);
-cleanup_lcm:
- llog_recov_thread_fini(filter->fo_lcm, 1);
- filter->fo_lcm = NULL;
- return rc;
-}
-
-static int
-filter_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
- struct obd_device *tgt, int *index)
-{
- struct filter_obd *filter = &obd->u.filter;
- struct llog_ctxt *ctxt;
- int rc;
- ENTRY;
-
- LASSERT(olg != NULL);
- if (olg == &obd->obd_olg)
- return filter_default_olg_init(obd, olg, tgt);
-
- LASSERT(filter->fo_lcm != NULL);
- rc = filter_olg_init(obd, olg, tgt);
- if (rc)
- RETURN(rc);
- ctxt = llog_group_get_ctxt(olg, LLOG_MDS_OST_REPL_CTXT);
- if (!ctxt) {
- CERROR("Can't get ctxt for %p:%x\n", olg,
- LLOG_MDS_OST_REPL_CTXT);
- filter_olg_fini(olg);
- RETURN(-ENODEV);
- }
- ctxt->llog_proc_cb = filter_recov_log_mds_ost_cb;
- ctxt->loc_lcm = lcm_get(filter->fo_lcm);
- llog_ctxt_put(ctxt);
- RETURN(rc);
-}
-
-static int filter_llog_finish(struct obd_device *obd, int count)
-{
- struct filter_obd *filter = &obd->u.filter;
- struct llog_ctxt *ctxt;
- ENTRY;
-
- ctxt = llog_group_get_ctxt(&obd->obd_olg, LLOG_MDS_OST_REPL_CTXT);
- if (ctxt) {
- /*
- * Make sure that no cached llcds left in recov_thread.
- * We actually do sync in disconnect time, but disconnect
- * may not come being marked rq_no_resend = 1.
- */
- llog_sync(ctxt, NULL, OBD_LLOG_FL_EXIT);
-
- /*
- * Balance class_import_get() in llog_receptor_accept().
- * This is safe to do, as llog is already synchronized
- * and its import may go.
- */
- cfs_mutex_lock(&ctxt->loc_mutex);
- if (ctxt->loc_imp) {
- class_import_put(ctxt->loc_imp);
- ctxt->loc_imp = NULL;
- }
-
- if (filter->fo_lcm) {
- llog_recov_thread_fini(filter->fo_lcm, obd->obd_force);
- filter->fo_lcm = NULL;
- }
-
- cfs_mutex_unlock(&ctxt->loc_mutex);
- llog_ctxt_put(ctxt);
- }
-
- RETURN(filter_olg_fini(&obd->obd_olg));
-}
-
-/**
- * Find the group llog according to group index in the llog group list.
- */
-static struct obd_llog_group *
-filter_find_olg_internal(struct filter_obd *filter, int group)
-{
- struct obd_llog_group *olg;
-
- LASSERT_SPIN_LOCKED(&filter->fo_llog_list_lock);
- cfs_list_for_each_entry(olg, &filter->fo_llog_list, olg_list) {
- if (olg->olg_seq == group)
- RETURN(olg);
- }
- RETURN(NULL);
-}
-
-/**
- * Find the group llog according to group index on the filter
- */
-struct obd_llog_group *filter_find_olg(struct obd_device *obd, int group)
-{
- struct obd_llog_group *olg = NULL;
- struct filter_obd *filter;
-
- filter = &obd->u.filter;
-
- if (group == FID_SEQ_LLOG)
- RETURN(&obd->obd_olg);
-
- cfs_spin_lock(&filter->fo_llog_list_lock);
- olg = filter_find_olg_internal(filter, group);
- cfs_spin_unlock(&filter->fo_llog_list_lock);
-
- RETURN(olg);
-}
-/**
- * Find the llog_group of the filter according to the group. If it can not
- * find, create the llog_group, which only happens when mds is being synced
- * with OST.
- */
-struct obd_llog_group *filter_find_create_olg(struct obd_device *obd, int group)
-{
- struct obd_llog_group *olg = NULL, *olg_new = NULL;
- struct filter_obd *filter;
- int rc;
-
- filter = &obd->u.filter;
-
- if (group == FID_SEQ_LLOG)
- RETURN(&obd->obd_olg);
-
- OBD_ALLOC_PTR(olg_new);
- if (olg_new == NULL)
- RETURN(ERR_PTR(-ENOMEM));
-
- cfs_spin_lock(&filter->fo_llog_list_lock);
- olg = filter_find_olg_internal(filter, group);
- if (olg) {
- if (olg->olg_initializing) {
- GOTO(out_unlock, olg = ERR_PTR(-EBUSY));
- } else {
- GOTO(out_unlock, olg);
- }
- } else {
- /* set as the newly allocated one */
- olg = olg_new;
- olg_new = NULL;
- }
-
- llog_group_init(olg, group);
- cfs_list_add(&olg->olg_list, &filter->fo_llog_list);
- olg->olg_initializing = 1;
- cfs_spin_unlock(&filter->fo_llog_list_lock);
-
- rc = obd_llog_init(obd, olg, obd, NULL);
- if (rc) {
- cfs_spin_lock(&filter->fo_llog_list_lock);
- cfs_list_del(&olg->olg_list);
- cfs_spin_unlock(&filter->fo_llog_list_lock);
- OBD_FREE_PTR(olg);
- GOTO(out, olg = ERR_PTR(-ENOMEM));
- }
- cfs_spin_lock(&filter->fo_llog_list_lock);
- olg->olg_initializing = 0;
- cfs_spin_unlock(&filter->fo_llog_list_lock);
- CDEBUG(D_OTHER, "%s: new llog group %u (0x%p)\n",
- obd->obd_name, group, olg);
-out:
- RETURN(olg);
-
-out_unlock:
- cfs_spin_unlock(&filter->fo_llog_list_lock);
- if (olg_new)
- OBD_FREE_PTR(olg_new);
- goto out;
-}
-
-static int filter_llog_connect(struct obd_export *exp,
- struct llogd_conn_body *body)
-{
- struct obd_device *obd = exp->exp_obd;
- struct llog_ctxt *ctxt;
- struct obd_llog_group *olg;
- int rc;
- ENTRY;
-
- CDEBUG(D_OTHER, "%s: LLog connect for: "LPX64"/"LPX64":%x\n",
- obd->obd_name, body->lgdc_logid.lgl_oid,
- body->lgdc_logid.lgl_oseq, body->lgdc_logid.lgl_ogen);
-
- olg = filter_find_olg(obd, body->lgdc_logid.lgl_oseq);
- if (!olg) {
- CERROR(" %s: can not find olg of group %d\n",
- obd->obd_name, (int)body->lgdc_logid.lgl_oseq);
- RETURN(-ENOENT);
- }
- llog_group_set_export(olg, exp);
-
- ctxt = llog_group_get_ctxt(olg, body->lgdc_ctxt_idx);
- LASSERTF(ctxt != NULL, "ctxt is not null, ctxt idx %d \n",
- body->lgdc_ctxt_idx);
-
- CDEBUG(D_HA, "%s: Recovery from log "LPX64"/"LPX64":%x\n",
- obd->obd_name, body->lgdc_logid.lgl_oid,
- body->lgdc_logid.lgl_oseq, body->lgdc_logid.lgl_ogen);
-
- cfs_spin_lock(&obd->u.filter.fo_flags_lock);
- obd->u.filter.fo_mds_ost_sync = 1;
- cfs_spin_unlock(&obd->u.filter.fo_flags_lock);
- rc = llog_connect(ctxt, &body->lgdc_logid,
- &body->lgdc_gen, NULL);
- llog_ctxt_put(ctxt);
- if (rc != 0)
- CERROR("failed to connect rc %d idx %d\n", rc,
- body->lgdc_ctxt_idx);
-
- RETURN(rc);
-}
-
-static int filter_llog_preclean(struct obd_device *obd)
-{
- struct obd_llog_group *olg, *tmp;
- struct filter_obd *filter;
- cfs_list_t remove_list;
- int rc = 0;
- ENTRY;
-
- rc = obd_llog_finish(obd, 0);
- if (rc)
- CERROR("failed to cleanup llogging subsystem\n");
-
- filter = &obd->u.filter;
- CFS_INIT_LIST_HEAD(&remove_list);
-
- cfs_spin_lock(&filter->fo_llog_list_lock);
- while (!cfs_list_empty(&filter->fo_llog_list)) {
- olg = cfs_list_entry(filter->fo_llog_list.next,
- struct obd_llog_group, olg_list);
- cfs_list_del(&olg->olg_list);
- cfs_list_add(&olg->olg_list, &remove_list);
- }
- cfs_spin_unlock(&filter->fo_llog_list_lock);
-
- cfs_list_for_each_entry_safe(olg, tmp, &remove_list, olg_list) {
- cfs_list_del_init(&olg->olg_list);
- rc = filter_olg_fini(olg);
- if (rc)
- CERROR("failed to cleanup llogging subsystem for %u\n",
- olg->olg_seq);
- OBD_FREE_PTR(olg);
- }
-
- RETURN(rc);
-}
-
-static int filter_precleanup(struct obd_device *obd,
- enum obd_cleanup_stage stage)
-{
- int rc = 0;
- ENTRY;
-
- switch(stage) {
- case OBD_CLEANUP_EARLY:
- break;
- case OBD_CLEANUP_EXPORTS:
- /* Stop recovery before namespace cleanup. */
- target_recovery_fini(obd);
-
- obd_exports_barrier(obd);
- obd_zombie_barrier();
-
- rc = filter_llog_preclean(obd);
- lprocfs_job_stats_fini(obd);
- lprocfs_remove_proc_entry("clear", obd->obd_proc_exports_entry);
- lprocfs_free_per_client_stats(obd);
- lprocfs_obd_cleanup(obd);
- lprocfs_free_obd_stats(obd);
- break;
- }
- RETURN(rc);
-}
-
-static int filter_cleanup(struct obd_device *obd)
-{
- struct filter_obd *filter = &obd->u.filter;
- ENTRY;
-
- if (obd->obd_fail)
- LCONSOLE_WARN("%s: shutting down for failover; client state "
- "will be preserved.\n", obd->obd_name);
-
- ldlm_namespace_free(obd->obd_namespace, NULL, obd->obd_force);
- obd->obd_namespace = NULL;
-
- sptlrpc_rule_set_free(&filter->fo_sptlrpc_rset);
-
- if (obd->u.obt.obt_sb == NULL)
- RETURN(0);
-
- filter_post(obd);
-
- ll_vfs_dq_off(obd->u.obt.obt_sb, 0);
- shrink_dcache_sb(obd->u.obt.obt_sb);
-
- server_put_mount(obd->obd_name, obd->u.obt.obt_vfsmnt);
- obd->u.obt.obt_sb = NULL;
-
- fsfilt_put_ops(obd->obd_fsops);
-
- filter_iobuf_pool_done(filter);
-
- LCONSOLE_INFO("OST %s has stopped.\n", obd->obd_name);
-
- RETURN(0);
-}
-
-static int filter_connect_internal(struct obd_export *exp,
- struct obd_connect_data *data,
- int reconnect)
-{
- struct filter_export_data *fed = &exp->exp_filter_data;
-
- if (!data)
- RETURN(0);
-
- CDEBUG(D_RPCTRACE, "%s: cli %s/%p ocd_connect_flags: "LPX64
- " ocd_version: %x ocd_grant: %d ocd_index: %u\n",
- exp->exp_obd->obd_name, exp->exp_client_uuid.uuid, exp,
- data->ocd_connect_flags, data->ocd_version,
- data->ocd_grant, data->ocd_index);
-
- if (fed->fed_group != 0 && fed->fed_group != data->ocd_group) {
- CWARN("!!! This export (nid %s) used object group %d "
- "earlier; now it's trying to use group %d! This could "
- "be a bug in the MDS. Please report to "
- "http://bugs.whamcloud.com/\n",
- obd_export_nid2str(exp), fed->fed_group,data->ocd_group);
- RETURN(-EPROTO);
- }
- fed->fed_group = data->ocd_group;
-
- data->ocd_connect_flags &= OST_CONNECT_SUPPORTED;
- exp->exp_connect_flags = data->ocd_connect_flags;
- data->ocd_version = LUSTRE_VERSION_CODE;
-
- /* Kindly make sure the SKIP_ORPHAN flag is from MDS. */
- if (data->ocd_connect_flags & OBD_CONNECT_MDS)
- CDEBUG(D_HA, "%s: Received MDS connection for group %u\n",
- exp->exp_obd->obd_name, data->ocd_group);
- else if (data->ocd_connect_flags & OBD_CONNECT_SKIP_ORPHAN)
- RETURN(-EPROTO);
-
- if (exp->exp_connect_flags & OBD_CONNECT_GRANT) {
- struct filter_obd *filter = &exp->exp_obd->u.filter;
- obd_size left, want;
-
- cfs_spin_lock(&exp->exp_obd->obd_osfs_lock);
- left = filter_grant_space_left(exp);
- want = data->ocd_grant;
- filter_grant(exp, fed->fed_grant, want, left, (reconnect == 0));
- data->ocd_grant = fed->fed_grant;
- cfs_spin_unlock(&exp->exp_obd->obd_osfs_lock);
-
- CDEBUG(D_CACHE, "%s: cli %s/%p ocd_grant: %d want: "
- LPU64" left: "LPU64"\n", exp->exp_obd->obd_name,
- exp->exp_client_uuid.uuid, exp,
- data->ocd_grant, want, left);
-
- filter->fo_tot_granted_clients ++;
- }
-
- if (data->ocd_connect_flags & OBD_CONNECT_INDEX) {
- struct lr_server_data *lsd = class_server_data(exp->exp_obd);
- int index = le32_to_cpu(lsd->lsd_ost_index);
-
- if (!(lsd->lsd_feature_compat &
- cpu_to_le32(OBD_COMPAT_OST))) {
- /* this will only happen on the first connect */
- lsd->lsd_ost_index = cpu_to_le32(data->ocd_index);
- lsd->lsd_feature_compat |= cpu_to_le32(OBD_COMPAT_OST);
- /* sync is not needed here as filter_client_add will
- * set exp_need_sync flag */
- filter_update_server_data(exp->exp_obd);
- } else if (index != data->ocd_index) {
- LCONSOLE_ERROR_MSG(0x136, "Connection from %s to index"
- " %u doesn't match actual OST index"
- " %u in last_rcvd file, bad "
- "configuration?\n",
- obd_export_nid2str(exp), index,
- data->ocd_index);
- RETURN(-EBADF);
- }
- /* FIXME: Do the same with the MDS UUID and lsd_peeruuid.
- * FIXME: We don't strictly need the COMPAT flag for that,
- * FIXME: as lsd_peeruuid[0] will tell us if that is set.
- * FIXME: We needed it for the index, as index 0 is valid. */
- }
-
- if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_SIZE)) {
- data->ocd_brw_size = 65536;
- } else if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE) {
- data->ocd_brw_size = min(data->ocd_brw_size,
- (__u32)(PTLRPC_MAX_BRW_PAGES << CFS_PAGE_SHIFT));
- if (data->ocd_brw_size == 0) {
- CERROR("%s: cli %s/%p ocd_connect_flags: "LPX64
- " ocd_version: %x ocd_grant: %d ocd_index: %u "
- "ocd_brw_size is unexpectedly zero, "
- "network data corruption?"
- "Refusing connection of this client\n",
- exp->exp_obd->obd_name,
- exp->exp_client_uuid.uuid,
- exp, data->ocd_connect_flags, data->ocd_version,
- data->ocd_grant, data->ocd_index);
- RETURN(-EPROTO);
- }
- }
-
- if (data->ocd_connect_flags & OBD_CONNECT_CKSUM) {
- __u32 cksum_types = data->ocd_cksum_types;
-
- /* The client set in ocd_cksum_types the checksum types it
- * supports. We have to mask off the algorithms that we don't
- * support */
- data->ocd_cksum_types &= cksum_types_supported_server();
-
- /* 1.6.4 clients are not supported any more */
-
- CDEBUG(D_RPCTRACE, "%s: cli %s supports cksum type %x, return "
- "%x\n", exp->exp_obd->obd_name,
- obd_export_nid2str(exp), cksum_types,
- data->ocd_cksum_types);
- } else {
- /* This client does not support OBD_CONNECT_CKSUM
- * fall back to CRC32 */
- CDEBUG(D_RPCTRACE, "%s: cli %s does not support "
- "OBD_CONNECT_CKSUM, CRC32 will be used\n",
- exp->exp_obd->obd_name,
- obd_export_nid2str(exp));
- }
-
- if (data->ocd_connect_flags & OBD_CONNECT_MAXBYTES)
- data->ocd_maxbytes = exp->exp_obd->u.obt.obt_sb->s_maxbytes;
-
- RETURN(0);
-}
-
-static int filter_reconnect(const struct lu_env *env,
- struct obd_export *exp, struct obd_device *obd,
- struct obd_uuid *cluuid,
- struct obd_connect_data *data,
- void *localdata)
-{
- int rc;
- ENTRY;
-
- if (exp == NULL || obd == NULL || cluuid == NULL)
- RETURN(-EINVAL);
-
- rc = filter_connect_internal(exp, data, 1);
- if (rc == 0)
- filter_export_stats_init(obd, exp, localdata);
-
- RETURN(rc);
-}
-
-static int filter_connect(const struct lu_env *env,
- struct obd_export **exp, struct obd_device *obd,
- struct obd_uuid *cluuid,
- struct obd_connect_data *data, void *localdata)
-{
- struct lvfs_run_ctxt saved;
- struct lustre_handle conn = { 0 };
- struct obd_export *lexp;
- int rc;
- ENTRY;
-
- if (exp == NULL || obd == NULL || cluuid == NULL)
- RETURN(-EINVAL);
-
- rc = class_connect(&conn, obd, cluuid);
- if (rc)
- RETURN(rc);
- lexp = class_conn2export(&conn);
- LASSERT(lexp != NULL);
-
- rc = filter_connect_internal(lexp, data, 0);
- if (rc)
- GOTO(cleanup, rc);
-
- filter_export_stats_init(obd, lexp, localdata);
- if (obd->obd_replayable) {
- struct lsd_client_data *lcd = lexp->exp_target_data.ted_lcd;
- LASSERT(lcd);
- memcpy(lcd->lcd_uuid, cluuid, sizeof(lcd->lcd_uuid));
- rc = filter_client_add(obd, lexp, -1);
- if (rc)
- GOTO(cleanup, rc);
- }
-
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- rc = filter_read_groups(obd, data->ocd_group, 1);
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- if (rc != 0) {
- CERROR("can't read group %u\n", data->ocd_group);
- GOTO(cleanup, rc);
- }
-
- GOTO(cleanup, rc);
-
-cleanup:
- if (rc) {
- class_disconnect(lexp);
- *exp = NULL;
- } else {
- *exp = lexp;
- }
-
- RETURN(rc);
-}
-
-/* Do extra sanity checks for grant accounting. We do this at connect,
- * disconnect, and statfs RPC time, so it shouldn't be too bad. We can
- * always get rid of it or turn it off when we know accounting is good. */
-static void filter_grant_sanity_check(struct obd_device *obd, const char *func)
-{
- struct filter_export_data *fed;
- struct obd_export *exp;
- obd_size maxsize = obd->obd_osfs.os_blocks * obd->obd_osfs.os_bsize;
- obd_size tot_dirty = 0, tot_pending = 0, tot_granted = 0;
- obd_size fo_tot_dirty, fo_tot_pending, fo_tot_granted;
-
- if (cfs_list_empty(&obd->obd_exports))
- return;
-
- /* We don't want to do this for large machines that do lots of
- mounts or unmounts. It burns... */
- if (obd->obd_num_exports > 100)
- return;
-
- cfs_spin_lock(&obd->obd_osfs_lock);
- cfs_spin_lock(&obd->obd_dev_lock);
- cfs_list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain) {
- int error = 0;
- fed = &exp->exp_filter_data;
- if (fed->fed_grant < 0 || fed->fed_pending < 0 ||
- fed->fed_dirty < 0)
- error = 1;
- if (maxsize > 0) { /* we may not have done a statfs yet */
- LASSERTF(fed->fed_grant + fed->fed_pending <= maxsize,
- "%s: cli %s/%p %ld+%ld > "LPU64"\n", func,
- exp->exp_client_uuid.uuid, exp,
- fed->fed_grant, fed->fed_pending, maxsize);
- LASSERTF(fed->fed_dirty <= maxsize,
- "%s: cli %s/%p %ld > "LPU64"\n", func,
- exp->exp_client_uuid.uuid, exp,
- fed->fed_dirty, maxsize);
- }
- if (error)
- CERROR("%s: cli %s/%p dirty %ld pend %ld grant %ld\n",
- obd->obd_name, exp->exp_client_uuid.uuid, exp,
- fed->fed_dirty, fed->fed_pending,fed->fed_grant);
- else
- CDEBUG(D_CACHE, "%s: cli %s/%p dirty %ld pend %ld grant %ld\n",
- obd->obd_name, exp->exp_client_uuid.uuid, exp,
- fed->fed_dirty, fed->fed_pending,fed->fed_grant);
- tot_granted += fed->fed_grant + fed->fed_pending;
- tot_pending += fed->fed_pending;
- tot_dirty += fed->fed_dirty;
- }
- fo_tot_granted = obd->u.filter.fo_tot_granted;
- fo_tot_pending = obd->u.filter.fo_tot_pending;
- fo_tot_dirty = obd->u.filter.fo_tot_dirty;
- cfs_spin_unlock(&obd->obd_dev_lock);
- cfs_spin_unlock(&obd->obd_osfs_lock);
-
- /* Do these assertions outside the spinlocks so we don't kill system */
- if (tot_granted != fo_tot_granted)
- CERROR("%s: tot_granted "LPU64" != fo_tot_granted "LPU64"\n",
- func, tot_granted, fo_tot_granted);
- if (tot_pending != fo_tot_pending)
- CERROR("%s: tot_pending "LPU64" != fo_tot_pending "LPU64"\n",
- func, tot_pending, fo_tot_pending);
- if (tot_dirty != fo_tot_dirty)
- CERROR("%s: tot_dirty "LPU64" != fo_tot_dirty "LPU64"\n",
- func, tot_dirty, fo_tot_dirty);
- if (tot_pending > tot_granted)
- CERROR("%s: tot_pending "LPU64" > tot_granted "LPU64"\n",
- func, tot_pending, tot_granted);
- if (tot_granted > maxsize)
- CERROR("%s: tot_granted "LPU64" > maxsize "LPU64"\n",
- func, tot_granted, maxsize);
- if (tot_dirty > maxsize)
- CERROR("%s: tot_dirty "LPU64" > maxsize "LPU64"\n",
- func, tot_dirty, maxsize);
-}
-
-/* Remove this client from the grant accounting totals. We also remove
- * the export from the obd device under the osfs and dev locks to ensure
- * that the filter_grant_sanity_check() calculations are always valid.
- * The client should do something similar when it invalidates its import. */
-static void filter_grant_discard(struct obd_export *exp)
-{
- struct obd_device *obd = exp->exp_obd;
- struct filter_obd *filter = &obd->u.filter;
- struct filter_export_data *fed = &exp->exp_filter_data;
-
- cfs_spin_lock(&obd->obd_osfs_lock);
- LASSERTF(filter->fo_tot_granted >= fed->fed_grant,
- "%s: tot_granted "LPU64" cli %s/%p fed_grant %ld\n",
- obd->obd_name, filter->fo_tot_granted,
- exp->exp_client_uuid.uuid, exp, fed->fed_grant);
- filter->fo_tot_granted -= fed->fed_grant;
- LASSERTF(filter->fo_tot_pending >= fed->fed_pending,
- "%s: tot_pending "LPU64" cli %s/%p fed_pending %ld\n",
- obd->obd_name, filter->fo_tot_pending,
- exp->exp_client_uuid.uuid, exp, fed->fed_pending);
- /* fo_tot_pending is handled in filter_grant_commit as bulk finishes */
- LASSERTF(filter->fo_tot_dirty >= fed->fed_dirty,
- "%s: tot_dirty "LPU64" cli %s/%p fed_dirty %ld\n",
- obd->obd_name, filter->fo_tot_dirty,
- exp->exp_client_uuid.uuid, exp, fed->fed_dirty);
- filter->fo_tot_dirty -= fed->fed_dirty;
- fed->fed_dirty = 0;
- fed->fed_grant = 0;
-
- cfs_spin_unlock(&obd->obd_osfs_lock);
-}
-
-static int filter_destroy_export(struct obd_export *exp)
-{
- struct filter_export_data *fed = &exp->exp_filter_data;
- ENTRY;
-
- if (fed->fed_pending)
- CERROR("%s: cli %s/%p has %lu pending on destroyed export\n",
- exp->exp_obd->obd_name, exp->exp_client_uuid.uuid,
- exp, fed->fed_pending);
-
- target_destroy_export(exp);
-
- if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
- &exp->exp_client_uuid)))
- RETURN(0);
-
- ldlm_destroy_export(exp);
- lut_client_free(exp);
-
- if (!exp->exp_obd->obd_replayable)
- fsfilt_sync(exp->exp_obd, exp->exp_obd->u.obt.obt_sb);
-
- filter_grant_discard(exp);
- filter_fmd_cleanup(exp);
-
- if (exp->exp_connect_flags & OBD_CONNECT_GRANT_SHRINK) {
- struct filter_obd *filter = &exp->exp_obd->u.filter;
- if (filter->fo_tot_granted_clients > 0)
- filter->fo_tot_granted_clients --;
- }
-
- if (!(exp->exp_flags & OBD_OPT_FORCE))
- filter_grant_sanity_check(exp->exp_obd, __func__);
-
- RETURN(0);
-}
-
-static void filter_sync_llogs(struct obd_device *obd, struct obd_export *dexp)
-{
- struct obd_llog_group *olg_min, *olg;
- struct filter_obd *filter;
- int worked = -1, group;
- struct llog_ctxt *ctxt;
- ENTRY;
-
- filter = &obd->u.filter;
-
- /* we can't sync log holding spinlock. also, we do not want to get
- * into livelock. so we do following: loop over MDS's exports in
- * group order and skip already synced llogs -bzzz */
- do {
- /* look for group with min. number, but > worked */
- olg_min = NULL;
- group = 1 << 30;
- cfs_spin_lock(&filter->fo_llog_list_lock);
- cfs_list_for_each_entry(olg, &filter->fo_llog_list, olg_list) {
- if (olg->olg_seq <= worked) {
- /* this group is already synced */
- continue;
- }
- if (group < olg->olg_seq) {
- /* we have group with smaller number to sync */
- continue;
- }
- /* store current minimal group */
- olg_min = olg;
- group = olg->olg_seq;
- }
- cfs_spin_unlock(&filter->fo_llog_list_lock);
-
- if (olg_min == NULL)
- break;
-
- worked = olg_min->olg_seq;
- if (olg_min->olg_exp &&
- (dexp == olg_min->olg_exp || dexp == NULL)) {
- int err;
- ctxt = llog_group_get_ctxt(olg_min,
- LLOG_MDS_OST_REPL_CTXT);
- if (ctxt) {
- err = llog_sync(ctxt, olg_min->olg_exp, 0);
- llog_ctxt_put(ctxt);
- if (err) {
- CERROR("error flushing logs to MDS: "
- "rc %d\n", err);
- }
- }
- }
- } while (olg_min != NULL);
-}
-
-/* Also incredibly similar to mds_disconnect */
-static int filter_disconnect(struct obd_export *exp)
-{
- struct obd_device *obd = exp->exp_obd;
- int rc;
- ENTRY;
-
- LASSERT(exp);
- class_export_get(exp);
-
- if (!(exp->exp_flags & OBD_OPT_FORCE))
- filter_grant_sanity_check(obd, __func__);
- filter_grant_discard(exp);
-
- /* Flush any remaining cancel messages out to the target */
- filter_sync_llogs(obd, exp);
-
- rc = server_disconnect_export(exp);
-
- /* Do not erase record for recoverable client. */
- if (obd->obd_replayable && (!obd->obd_fail || exp->exp_failed))
- filter_client_del(exp);
- else
- fsfilt_sync(obd, obd->u.obt.obt_sb);
-
- class_export_put(exp);
- RETURN(rc);
-}
-
-/* reverse import is changed, sync all cancels */
-static void filter_revimp_update(struct obd_export *exp)
-{
- ENTRY;
-
- LASSERT(exp);
- class_export_get(exp);
-
- /* flush any remaining cancel messages out to the target */
- filter_sync_llogs(exp->exp_obd, exp);
- class_export_put(exp);
- EXIT;
-}
-
-static int filter_ping(const struct lu_env *env, struct obd_export *exp)
-{
- filter_fmd_expire(exp);
- return 0;
-}
-
-struct dentry *__filter_oa2dentry(struct obd_device *obd, struct ost_id *ostid,
- const char *what, int quiet)
-{
- struct dentry *dchild = NULL;
-
- dchild = filter_fid2dentry(obd, NULL, ostid->oi_seq, ostid->oi_id);
-
- if (IS_ERR(dchild)) {
- CERROR("%s error looking up object: "POSTID"\n",
- what, ostid->oi_id, ostid->oi_seq);
- RETURN(dchild);
- }
-
- if (dchild->d_inode == NULL) {
- if (!quiet)
- CERROR("%s: %s on non-existent object: "POSTID" \n",
- obd->obd_name, what, ostid->oi_id,ostid->oi_seq);
- f_dput(dchild);
- RETURN(ERR_PTR(-ENOENT));
- }
-
-#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 7, 50, 0)
- /* Try to correct for a bug in 2.1.0 (LU-221) that caused negative
- * timestamps to appear to be in the far future, due old timestamp
- * being stored on disk as an unsigned value. This fixes up any
- * bad values stored on disk before returning them to the client,
- * and ensures any timestamp updates are correct. LU-1042 */
- if (unlikely(LTIME_S(dchild->d_inode->i_atime) == LU221_BAD_TIME))
- LTIME_S(dchild->d_inode->i_atime) = 0;
- if (unlikely(LTIME_S(dchild->d_inode->i_mtime) == LU221_BAD_TIME))
- LTIME_S(dchild->d_inode->i_mtime) = 0;
- if (unlikely(LTIME_S(dchild->d_inode->i_ctime) == LU221_BAD_TIME))
- LTIME_S(dchild->d_inode->i_ctime) = 0;
-#else
-#warning "remove old LU-221/LU-1042 workaround code"
-#endif
-
- return dchild;
-}
-
-static int filter_getattr(const struct lu_env *env, struct obd_export *exp,
- struct obd_info *oinfo)
-{
- struct dentry *dentry = NULL;
- struct obd_device *obd;
- __u64 curr_version;
- int rc = 0;
- ENTRY;
-
- rc = filter_auth_capa(exp, NULL, oinfo->oi_oa->o_seq,
- oinfo_capa(oinfo), CAPA_OPC_META_READ);
- if (rc)
- RETURN(rc);
-
- obd = class_exp2obd(exp);
- if (obd == NULL) {
- CDEBUG(D_IOCTL, "invalid client export %p\n", exp);
- RETURN(-EINVAL);
- }
-
- dentry = filter_oa2dentry(obd, &oinfo->oi_oa->o_oi);
- if (IS_ERR(dentry))
- RETURN(PTR_ERR(dentry));
-
- /* Limit the valid bits in the return data to what we actually use */
- oinfo->oi_oa->o_valid = OBD_MD_FLID;
- obdo_from_inode(oinfo->oi_oa, dentry->d_inode, FILTER_VALID_FLAGS);
-
- /* Store inode version in reply */
- curr_version = fsfilt_get_version(exp->exp_obd, dentry->d_inode);
- if ((__s64)curr_version != -EOPNOTSUPP) {
- oinfo->oi_oa->o_valid |= OBD_MD_FLDATAVERSION;
- oinfo->oi_oa->o_data_version = curr_version;
- }
-
- f_dput(dentry);
- RETURN(rc);
-}
-
-/* this should be enabled/disabled in condition to enabled/disabled large
- * inodes (fast EAs) in backing store FS. */
-int filter_update_fidea(struct obd_export *exp, struct inode *inode,
- void *handle, struct obdo *oa)
-{
- struct obd_device *obd = exp->exp_obd;
- int rc = 0;
- ENTRY;
-
- if (oa->o_valid & OBD_MD_FLFID) {
- struct filter_fid ff;
-
- if (!(oa->o_valid & OBD_MD_FLGROUP))
- oa->o_seq = 0;
- /* packing fid and converting it to LE for storing into EA.
- * Here ->o_stripe_idx should be filled by LOV and rest of
- * fields - by client. */
- ff.ff_parent.f_seq = cpu_to_le64(oa->o_parent_seq);
- ff.ff_parent.f_oid = cpu_to_le32(oa->o_parent_oid);
- /* XXX: we are ignoring o_parent_ver here, since this should
- * be the same for all objects in this fileset. */
- ff.ff_parent.f_ver = cpu_to_le32(oa->o_stripe_idx);
- ff.ff_objid = cpu_to_le64(oa->o_id);
- ff.ff_seq = cpu_to_le64(oa->o_seq);
-
- CDEBUG(D_INODE, "storing filter fid EA (parent "DFID" "
- LPU64"/"LPU64")\n", PFID(&ff.ff_parent), oa->o_id,
- oa->o_seq);
-
- rc = fsfilt_set_md(obd, inode, handle, &ff, sizeof(ff), "fid");
- if (rc)
- CERROR("store fid in object failed! rc: %d\n", rc);
- } else {
- CDEBUG(D_HA, "OSS object without fid info!\n");
- }
-
- RETURN(rc);
-}
-
-/* this is called from filter_truncate() until we have filter_punch() */
-int filter_setattr_internal(struct obd_export *exp, struct dentry *dentry,
- struct obdo *oa, struct obd_trans_info *oti)
-{
- struct llog_cookie *fcc = NULL;
- struct filter_obd *filter;
- int rc, err, sync = 0;
- loff_t old_size = 0;
- unsigned int ia_valid;
- struct inode *inode;
- struct page *page = NULL;
- struct iattr iattr;
- void *handle;
- ENTRY;
-
- LASSERT(dentry != NULL);
- LASSERT(!IS_ERR(dentry));
-
- inode = dentry->d_inode;
- LASSERT(inode != NULL);
-
- filter = &exp->exp_obd->u.filter;
- iattr_from_obdo(&iattr, oa, oa->o_valid);
- ia_valid = iattr.ia_valid;
-
- if (oa->o_valid & OBD_MD_FLCOOKIE) {
- OBD_ALLOC(fcc, sizeof(*fcc));
- if (fcc != NULL)
- *fcc = oa->o_lcookie;
- }
- if (ia_valid & (ATTR_SIZE | ATTR_UID | ATTR_GID)) {
- unsigned long now = jiffies;
- /* Filter truncates and writes are serialized by
- * i_alloc_sem, see the comment in
- * filter_preprw_write.*/
- if (ia_valid & ATTR_SIZE)
- down_write(&inode->i_alloc_sem);
- mutex_lock(&inode->i_mutex);
- fsfilt_check_slow(exp->exp_obd, now, "i_alloc_sem and i_mutex");
- old_size = i_size_read(inode);
- }
-
- /* VBR: version recovery check */
- rc = filter_version_get_check(exp, oti, inode);
- if (rc)
- GOTO(out_unlock, rc);
-
- /* Let's pin the last page so that ldiskfs_truncate
- * should not start GFP_FS allocation. */
- if (ia_valid & ATTR_SIZE) {
- page = grab_cache_page(inode->i_mapping,
- iattr.ia_size >> PAGE_CACHE_SHIFT);
- if (page == NULL)
- GOTO(out_unlock, rc = -ENOMEM);
-
- unlock_page(page);
- }
-
- /* If the inode still has SUID+SGID bits set (see filter_precreate())
- * then we will accept the UID+GID sent by the client during write for
- * initializing the ownership of this inode. We only allow this to
- * happen once so clear these bits in setattr. In 2.6 kernels it is
- * possible to get ATTR_UID and ATTR_GID separately, so we only clear
- * the flags that are actually being set. */
- if (ia_valid & (ATTR_UID | ATTR_GID)) {
- CDEBUG(D_INODE, "update UID/GID to %lu/%lu\n",
- (unsigned long)oa->o_uid, (unsigned long)oa->o_gid);
-
- if ((inode->i_mode & S_ISUID) && (ia_valid & ATTR_UID)) {
- if (!(ia_valid & ATTR_MODE)) {
- iattr.ia_mode = inode->i_mode;
- iattr.ia_valid |= ATTR_MODE;
- }
- iattr.ia_mode &= ~S_ISUID;
- }
- if ((inode->i_mode & S_ISGID) && (ia_valid & ATTR_GID)) {
- if (!(iattr.ia_valid & ATTR_MODE)) {
- iattr.ia_mode = inode->i_mode;
- iattr.ia_valid |= ATTR_MODE;
- }
- iattr.ia_mode &= ~S_ISGID;
- }
-
- handle = fsfilt_start_log(exp->exp_obd, inode,
- FSFILT_OP_SETATTR, oti, 1);
- if (IS_ERR(handle))
- GOTO(out_unlock, rc = PTR_ERR(handle));
-
- /* update inode EA only once when inode is suid bit marked. As
- * on 2.6.x UID and GID may be set separately, we check here
- * only one of them to avoid double setting. */
- if (inode->i_mode & S_ISUID)
- filter_update_fidea(exp, inode, handle, oa);
- } else {
- handle = fsfilt_start(exp->exp_obd, inode,
- FSFILT_OP_SETATTR, oti);
- if (IS_ERR(handle))
- GOTO(out_unlock, rc = PTR_ERR(handle));
- }
-
- /* Locking order: i_mutex -> journal_lock -> dqptr_sem. LU-952 */
- if (ia_valid & (ATTR_SIZE | ATTR_UID | ATTR_GID))
- ll_vfs_dq_init(inode);
-
- if (oa->o_valid & OBD_MD_FLFLAGS) {
- rc = fsfilt_iocontrol(exp->exp_obd, dentry,
- FSFILT_IOC_SETFLAGS, (long)&oa->o_flags);
- } else {
- rc = fsfilt_setattr(exp->exp_obd, dentry, handle, &iattr, 1);
- if (fcc != NULL)
- /* set cancel cookie callback function */
- sync = fsfilt_add_journal_cb(exp->exp_obd, 0, handle,
- filter_cancel_cookies_cb,
- fcc);
- }
-
- if (OBD_FAIL_CHECK(OBD_FAIL_OST_SETATTR_CREDITS))
- fsfilt_extend(exp->exp_obd, inode, 0, handle);
-
- /* The truncate might have used up our transaction credits. Make sure
- * we have two left for the last_rcvd and VBR inode version updates. */
- err = fsfilt_extend(exp->exp_obd, inode, 2, handle);
-
- /* Update inode version only if data has changed => size has changed */
- rc = filter_finish_transno(exp, ia_valid & ATTR_SIZE ? inode : NULL,
- oti, rc, sync);
-
- if (sync) {
- filter_cancel_cookies_cb(exp->exp_obd, 0, fcc, rc);
- fcc = NULL;
- }
-
- err = fsfilt_commit(exp->exp_obd, inode, handle, 0);
- if (err) {
- CERROR("error on commit, err = %d\n", err);
- if (!rc)
- rc = err;
- } else {
- fcc = NULL;
- }
-
- /* For a partial-page truncate flush the page to disk immediately
- * to avoid data corruption during direct disk write. b=17397 */
- if (!sync && (iattr.ia_valid & ATTR_SIZE) &&
- old_size != iattr.ia_size && (iattr.ia_size & ~CFS_PAGE_MASK)) {
- err = filemap_fdatawrite_range(inode->i_mapping, iattr.ia_size,
- iattr.ia_size + 1);
- if (!rc)
- rc = err;
- }
-
- EXIT;
-
-out_unlock:
- if (page)
- page_cache_release(page);
-
- if (ia_valid & (ATTR_SIZE | ATTR_UID | ATTR_GID))
- mutex_unlock(&inode->i_mutex);
- if (ia_valid & ATTR_SIZE)
- up_write(&inode->i_alloc_sem);
- if (fcc)
- OBD_FREE(fcc, sizeof(*fcc));
- return rc;
-}
-
-/* this is called from filter_truncate() until we have filter_punch() */
-int filter_setattr(const struct lu_env *env, struct obd_export *exp,
- struct obd_info *oinfo, struct obd_trans_info *oti)
-{
- struct obdo *oa = oinfo->oi_oa;
- struct lustre_capa *capa = oinfo_capa(oinfo);
- struct ldlm_res_id res_id;
- struct filter_mod_data *fmd;
- struct lvfs_run_ctxt saved;
- struct filter_obd *filter;
- struct ldlm_resource *res;
- struct dentry *dentry;
- __u64 opc = CAPA_OPC_META_WRITE;
- int rc;
- ENTRY;
-
- if (oinfo->oi_flags & OBD_FL_PUNCH)
- opc |= CAPA_OPC_OSS_TRUNC;
-
- rc = filter_auth_capa(exp, NULL, oa->o_seq, capa, opc);
- if (rc)
- RETURN(rc);
-
- if (oa->o_valid & (OBD_MD_FLUID | OBD_MD_FLGID)) {
- rc = filter_capa_fixoa(exp, oa, oa->o_seq, capa);
- if (rc)
- RETURN(rc);
- }
-
- osc_build_res_name(oa->o_id, oa->o_seq, &res_id);
- /* This would be very bad - accidentally truncating a file when
- * changing the time or similar - bug 12203. */
- if (oa->o_valid & OBD_MD_FLSIZE &&
- oinfo->oi_policy.l_extent.end != OBD_OBJECT_EOF) {
- static char mdsinum[48];
-
- if (oa->o_valid & OBD_MD_FLFID)
- snprintf(mdsinum, sizeof(mdsinum) - 1, " of inode "DFID,
- oa->o_parent_seq, oa->o_parent_oid,
- oa->o_parent_ver);
- else
- mdsinum[0] = '\0';
-
- CERROR("%s: setattr from %s trying to truncate objid "POSTID
- "%s\n", exp->exp_obd->obd_name, obd_export_nid2str(exp),
- oa->o_id, oa->o_seq, mdsinum);
- RETURN(-EPERM);
- }
-
- dentry = __filter_oa2dentry(exp->exp_obd, &oinfo->oi_oa->o_oi, __func__, 1);
- if (IS_ERR(dentry))
- RETURN(PTR_ERR(dentry));
-
- filter = &exp->exp_obd->u.filter;
- push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
-
- /*
- * We need to be atomic against a concurrent write
- * (which takes the semaphore for reading). fmd_mactime_xid
- * checks will have no effect if a write request with lower
- * xid starts just before a setattr and finishes later than
- * the setattr (see bug 21489, comment 27).
- */
- if (oa->o_valid &
- (OBD_MD_FLMTIME | OBD_MD_FLATIME | OBD_MD_FLCTIME)) {
- unsigned long now = jiffies;
- down_write(&dentry->d_inode->i_alloc_sem);
- fsfilt_check_slow(exp->exp_obd, now, "i_alloc_sem");
- fmd = filter_fmd_get(exp, oa->o_id, oa->o_seq);
- if (fmd && fmd->fmd_mactime_xid < oti->oti_xid)
- fmd->fmd_mactime_xid = oti->oti_xid;
- filter_fmd_put(exp, fmd);
- up_write(&dentry->d_inode->i_alloc_sem);
- }
-
- /* setting objects attributes (including owner/group) */
- rc = filter_setattr_internal(exp, dentry, oa, oti);
- if (rc)
- GOTO(out_unlock, rc);
-
- res = ldlm_resource_get(exp->exp_obd->obd_namespace, NULL,
- &res_id, LDLM_EXTENT, 0);
-
- if (res != NULL) {
- LDLM_RESOURCE_ADDREF(res);
- rc = ldlm_res_lvbo_update(res, NULL, 0);
- LDLM_RESOURCE_DELREF(res);
- ldlm_resource_putref(res);
- }
-
- oa->o_valid = OBD_MD_FLID;
-
- /* Quota release need uid/gid info */
- obdo_from_inode(oa, dentry->d_inode,
- FILTER_VALID_FLAGS | OBD_MD_FLUID | OBD_MD_FLGID);
-
- filter_counter_incr(exp, LPROC_FILTER_STATS_SETATTR,
- oti ? oti->oti_jobid : NULL, 1);
- EXIT;
-out_unlock:
- f_dput(dentry);
- pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
- return rc;
-}
-
-/* XXX identical to osc_unpackmd */
-static int filter_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
- struct lov_mds_md *lmm, int lmm_bytes)
-{
- int lsm_size;
- ENTRY;
-
- if (lmm != NULL) {
- if (lmm_bytes < sizeof (*lmm)) {
- CERROR("lov_mds_md too small: %d, need %d\n",
- lmm_bytes, (int)sizeof(*lmm));
- RETURN(-EINVAL);
- }
- /* XXX LOV_MAGIC etc check? */
-
- if (lmm->lmm_object_id == cpu_to_le64(0)) {
- CERROR("lov_mds_md: zero lmm_object_id\n");
- RETURN(-EINVAL);
- }
- }
-
- lsm_size = lov_stripe_md_size(1);
- if (lsmp == NULL)
- RETURN(lsm_size);
-
- if (*lsmp != NULL && lmm == NULL) {
- OBD_FREE((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
- OBD_FREE(*lsmp, lsm_size);
- *lsmp = NULL;
- RETURN(0);
- }
-
- if (*lsmp == NULL) {
- OBD_ALLOC(*lsmp, lsm_size);
- if (*lsmp == NULL)
- RETURN(-ENOMEM);
-
- OBD_ALLOC((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
- if ((*lsmp)->lsm_oinfo[0] == NULL) {
- OBD_FREE(*lsmp, lsm_size);
- RETURN(-ENOMEM);
- }
- loi_init((*lsmp)->lsm_oinfo[0]);
- }
-
- if (lmm != NULL) {
- /* XXX zero *lsmp? */
- (*lsmp)->lsm_object_id = le64_to_cpu (lmm->lmm_object_id);
- LASSERT((*lsmp)->lsm_object_id);
- }
-
- (*lsmp)->lsm_maxbytes = exp->exp_obd->u.obt.obt_sb->s_maxbytes;
-
- RETURN(lsm_size);
-}
-
-/* caller must hold fo_create_locks[oa->o_seq] */
-static int filter_destroy_precreated(struct obd_export *exp, struct obdo *oa,
- struct filter_obd *filter)
-{
- struct obdo doa = { 0 }; /* XXX obdo on stack */
- obd_id last, id;
- int rc = 0;
- int skip_orphan;
- ENTRY;
-
- LASSERT_MUTEX_LOCKED(&filter->fo_create_locks[oa->o_seq]);
-
- memset(&doa, 0, sizeof(doa));
-
- doa.o_valid |= OBD_MD_FLGROUP;
- doa.o_seq = oa->o_seq;
- doa.o_mode = S_IFREG;
-
- if (!cfs_test_bit(doa.o_seq, &filter->fo_destroys_in_progress)) {
- CERROR("%s:["LPU64"] destroys_in_progress already cleared\n",
- exp->exp_obd->obd_name, doa.o_seq);
- RETURN(0);
- }
-
- last = filter_last_id(filter, doa.o_seq);
-
- skip_orphan = !!(exp->exp_connect_flags & OBD_CONNECT_SKIP_ORPHAN);
-
- CDEBUG(D_HA, "%s: deleting orphan objects from "LPU64" to "LPU64"%s\n",
- exp->exp_obd->obd_name, oa->o_id + 1, last,
- skip_orphan ? ", orphan objids won't be reused any more." : ".");
-
- for (id = last; id > oa->o_id; id--) {
- doa.o_id = id;
- rc = filter_destroy(NULL, exp, &doa, NULL, NULL, NULL, NULL);
- if (rc && rc != -ENOENT) /* this is pretty fatal... */
- CEMERG("error destroying precreate objid "LPU64": %d\n",
- id, rc);
-
- /* update last_id on disk periodically so that if we restart
- * we don't need to re-scan all of the just-deleted objects. */
- if ((id & 511) == 0 && !skip_orphan) {
- filter_set_last_id(filter, id - 1, doa.o_seq);
- filter_update_last_objid(exp->exp_obd, doa.o_seq, 0);
- }
- }
-
- CDEBUG(D_HA, "%s: after destroy: set last_objids["LPU64"] = "LPU64"\n",
- exp->exp_obd->obd_name, doa.o_seq, oa->o_id);
-
- if (!skip_orphan) {
- filter_set_last_id(filter, id, doa.o_seq);
- rc = filter_update_last_objid(exp->exp_obd, doa.o_seq, 1);
- } else {
- /*
- * We have destroyed orphan objects, but don't want to reuse
- * them. Therefore we don't reset last_id to the last created
- * objects. Instead, we report back to the MDS the object id
- * of the last orphan, so that the MDS can restart allocating
- * objects from this id + 1 and thus skip the whole orphan
- * object id range
- */
- oa->o_id = last;
- rc = 0;
- }
- cfs_clear_bit(doa.o_seq, &filter->fo_destroys_in_progress);
-
- RETURN(rc);
-}
-
-static int filter_precreate(struct obd_device *obd, struct obdo *oa,
- obd_seq group, int *num);
-/* returns a negative error or a nonnegative number of files to create */
-static int filter_handle_precreate(struct obd_export *exp, struct obdo *oa,
- obd_seq group, struct obd_trans_info *oti)
-{
- struct obd_device *obd = exp->exp_obd;
- struct filter_obd *filter = &obd->u.filter;
- int diff, rc;
- ENTRY;
-
- /* delete orphans request */
- if ((oa->o_valid & OBD_MD_FLFLAGS) && (oa->o_flags & OBD_FL_DELORPHAN)){
- obd_id last = filter_last_id(filter, group);
-
- if (oti->oti_conn_cnt < exp->exp_conn_cnt) {
- CERROR("%s: dropping old orphan cleanup request\n",
- obd->obd_name);
- RETURN(0);
- }
- /* This causes inflight precreates to abort and drop lock */
- cfs_set_bit(group, &filter->fo_destroys_in_progress);
- cfs_mutex_lock(&filter->fo_create_locks[group]);
- if (!cfs_test_bit(group, &filter->fo_destroys_in_progress)) {
- CERROR("%s:["LPU64"] destroys_in_progress already cleared\n",
- exp->exp_obd->obd_name, group);
- cfs_mutex_unlock(&filter->fo_create_locks[group]);
- RETURN(0);
- }
- diff = oa->o_id - last;
- CDEBUG(D_HA, "filter_last_id() = "LPU64" -> diff = %d\n",
- last, diff);
-
- if (-diff > (OST_MAX_PRECREATE * 3) / 2) {
- CERROR("%s: ignoring bogus orphan destroy request: "
- "obdid "LPU64" last_id "LPU64"\n", obd->obd_name,
- oa->o_id, last);
- /* FIXME: should reset precreate_next_id on MDS */
- GOTO(out, rc = -EINVAL);
- }
- if (diff < 0) {
- rc = filter_destroy_precreated(exp, oa, filter);
- if (rc)
- CERROR("%s: unable to write lastobjid, but "
- "orphans were deleted\n", obd->obd_name);
- GOTO(out, rc);
- } else {
- /* XXX: Used by MDS for the first time! */
- cfs_clear_bit(group, &filter->fo_destroys_in_progress);
- }
- } else {
- cfs_mutex_lock(&filter->fo_create_locks[group]);
- if (oti->oti_conn_cnt < exp->exp_conn_cnt) {
- CERROR("%s: dropping old precreate request\n",
- obd->obd_name);
- GOTO(out, rc = 0);
- }
- /* only precreate if group == 0 and o_id is specfied */
- if (!fid_seq_is_mdt(group) || oa->o_id == 0)
- diff = 1;
- else
- diff = oa->o_id - filter_last_id(filter, group);
- CDEBUG(D_RPCTRACE, "filter_last_id() = "LPU64" -> diff = %d\n",
- filter_last_id(filter, group), diff);
-
- /*
- * Check obd->obd_recovering to handle the race condition
- * while recreating missing precreated objects through
- * filter_preprw_write() and mds_lov_clear_orphans()
- * at the same time.
- */
- LASSERTF(ergo(!obd->obd_recovering, diff >= 0),
- "%s: "LPU64" - "LPU64" = %d\n", obd->obd_name,
- oa->o_id, filter_last_id(filter, group), diff);
- }
-
- if (diff > 0) {
- oa->o_id = filter_last_id(&obd->u.filter, group);
- rc = filter_precreate(obd, oa, group, &diff);
- oa->o_id = filter_last_id(&obd->u.filter, group);
- oa->o_seq = group;
- oa->o_valid |= (OBD_MD_FLID | OBD_MD_FLGROUP);
- GOTO(out, rc);
- }
- /* else diff == 0 */
- GOTO(out, rc = 0);
-out:
- cfs_mutex_unlock(&filter->fo_create_locks[group]);
- return rc;
-}
-
-static int filter_statfs(const struct lu_env *env, struct obd_export *exp,
- struct obd_statfs *osfs, __u64 max_age, __u32 flags)
-{
- struct obd_device *obd = class_exp2obd(exp);
- struct filter_obd *filter = &obd->u.filter;
- int blockbits = obd->u.obt.obt_sb->s_blocksize_bits;
- struct lr_server_data *lsd = class_server_data(obd);
- int rc;
- ENTRY;
-
- /* at least try to account for cached pages. its still racey and
- * might be under-reporting if clients haven't announced their
- * caches with brw recently */
- cfs_spin_lock(&obd->obd_osfs_lock);
- rc = fsfilt_statfs(obd, obd->u.obt.obt_sb, max_age);
- memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
- cfs_spin_unlock(&obd->obd_osfs_lock);
-
- CDEBUG(D_SUPER | D_CACHE, "blocks cached "LPU64" granted "LPU64
- " pending "LPU64" free "LPU64" avail "LPU64"\n",
- filter->fo_tot_dirty, filter->fo_tot_granted,
- filter->fo_tot_pending,
- osfs->os_bfree << blockbits, osfs->os_bavail << blockbits);
-
- filter_grant_sanity_check(obd, __func__);
-
- osfs->os_bavail -= min(osfs->os_bavail, GRANT_FOR_LLOG(obd) +
- ((filter->fo_tot_dirty + filter->fo_tot_pending +
- osfs->os_bsize - 1) >> blockbits));
-
- if (OBD_FAIL_CHECK_VALUE(OBD_FAIL_OST_ENOSPC,
- le32_to_cpu(lsd->lsd_ost_index)))
- osfs->os_bfree = osfs->os_bavail = 2;
-
- if (OBD_FAIL_CHECK_VALUE(OBD_FAIL_OST_ENOINO,
- le32_to_cpu(lsd->lsd_ost_index)))
- osfs->os_ffree = 0;
-
- /* set EROFS to state field if FS is mounted as RDONLY. The goal is to
- * stop creating files on MDS if OST is not good shape to create
- * objects.*/
- osfs->os_state = 0;
-
- if (filter->fo_obt.obt_sb->s_flags & MS_RDONLY)
- osfs->os_state = OS_STATE_READONLY;
-
- if (filter->fo_raid_degraded)
- osfs->os_state |= OS_STATE_DEGRADED;
- RETURN(rc);
-}
-
-static int filter_use_existing_obj(struct obd_device *obd,
- struct dentry *dchild, void **handle,
- int *cleanup_phase)
-{
- struct inode *inode = dchild->d_inode;
- struct iattr iattr;
- int rc;
-
- if ((inode->i_mode & (S_ISUID | S_ISGID)) == (S_ISUID|S_ISGID))
- return 0;
-
- *handle = fsfilt_start_log(obd, inode, FSFILT_OP_SETATTR, NULL, 1);
- if (IS_ERR(*handle))
- return PTR_ERR(*handle);
-
- iattr.ia_valid = ATTR_MODE;
- iattr.ia_mode = S_ISUID | S_ISGID |0666;
- rc = fsfilt_setattr(obd, dchild, *handle, &iattr, 1);
- if (rc == 0)
- *cleanup_phase = 3;
-
- return rc;
-}
-
-static __u64 filter_calc_free_inodes(struct obd_device *obd)
-{
- int rc;
- __u64 os_ffree = -1;
-
- cfs_spin_lock(&obd->obd_osfs_lock);
- rc = fsfilt_statfs(obd, obd->u.obt.obt_sb, cfs_time_shift_64(1));
- if (rc == 0)
- os_ffree = obd->obd_osfs.os_ffree;
- cfs_spin_unlock(&obd->obd_osfs_lock);
-
- return os_ffree;
-}
-
-/* We rely on the fact that only one thread will be creating files in a given
- * group at a time, which is why we don't need an atomic filter_get_new_id.
- * Even if we had that atomic function, the following race would exist:
- *
- * thread 1: gets id x from filter_next_id
- * thread 2: gets id (x + 1) from filter_next_id
- * thread 2: creates object (x + 1)
- * thread 1: tries to create object x, gets -ENOSPC
- *
- * Caller must hold fo_create_locks[group]
- */
-static int filter_precreate(struct obd_device *obd, struct obdo *oa,
- obd_seq group, int *num)
-{
- struct dentry *dchild = NULL, *dparent = NULL;
- struct filter_obd *filter;
- struct obd_statfs *osfs;
- struct iattr iattr;
- int err = 0, rc = 0, recreate_obj = 0, i;
- cfs_time_t enough_time = cfs_time_shift(DISK_TIMEOUT/2);
- __u64 os_ffree;
- obd_id next_id;
- void *handle = NULL;
- ENTRY;
-
- filter = &obd->u.filter;
-
- LASSERT_MUTEX_LOCKED(&filter->fo_create_locks[group]);
-
- OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_PRECREATE, obd_timeout / 2);
-
- if ((oa->o_valid & OBD_MD_FLFLAGS) &&
- (oa->o_flags & OBD_FL_RECREATE_OBJS)) {
- recreate_obj = 1;
- } else {
- OBD_ALLOC(osfs, sizeof(*osfs));
- if (osfs == NULL)
- RETURN(-ENOMEM);
- rc = filter_statfs(NULL, obd->obd_self_export, osfs,
- cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
- 0);
- if (rc == 0 && osfs->os_bavail < (osfs->os_blocks >> 10)) {
- CDEBUG(D_RPCTRACE,"%s: not enough space for create "
- LPU64"\n", obd->obd_name, osfs->os_bavail <<
- obd->u.obt.obt_vfsmnt->mnt_sb->s_blocksize_bits);
- *num = 0;
- if (oa->o_valid & OBD_MD_FLFLAGS)
- oa->o_flags |= OBD_FL_NOSPC_BLK;
- else {
- oa->o_valid |= OBD_MD_FLFLAGS;
- oa->o_flags = OBD_FL_NOSPC_BLK;
- }
-
- rc = -ENOSPC;
- }
- OBD_FREE(osfs, sizeof(*osfs));
- if (rc)
- RETURN(rc);
- }
-
- CDEBUG(D_RPCTRACE, "%s: precreating %d objects in group "LPU64
- " at "LPU64"\n", obd->obd_name, *num, group, oa->o_id);
-
- for (i = 0; i < *num && err == 0; i++) {
- int cleanup_phase = 0;
-
- if (cfs_test_bit(group, &filter->fo_destroys_in_progress)) {
- CWARN("%s: create aborted by destroy\n",
- obd->obd_name);
- rc = -EAGAIN;
- break;
- }
-
- if (recreate_obj) {
- __u64 last_id;
- next_id = oa->o_id;
- last_id = filter_last_id(filter, group);
- if (next_id > last_id) {
- CERROR("Error: Trying to recreate obj greater"
- "than last id "LPD64" > "LPD64"\n",
- next_id, last_id);
- GOTO(cleanup, rc = -EINVAL);
- }
- } else
- next_id = filter_last_id(filter, group) + 1;
-
- /* Don't create objects beyond the valid range for this SEQ */
- if (unlikely(fid_seq_is_mdt0(group) &&
- next_id >= IDIF_MAX_OID)) {
- CERROR("%s:"POSTID" hit the IDIF_MAX_OID (1<<48)!\n",
- obd->obd_name, next_id, group);
- GOTO(cleanup, rc = -ENOSPC);
- } else if (unlikely(!fid_seq_is_mdt0(group) &&
- next_id >= OBIF_MAX_OID)) {
- CERROR("%s:"POSTID" hit the OBIF_MAX_OID (1<<32)!\n",
- obd->obd_name, next_id, group);
- GOTO(cleanup, rc = -ENOSPC);
- }
-
- dparent = filter_parent_lock(obd, group, next_id);
- if (IS_ERR(dparent))
- GOTO(cleanup, rc = PTR_ERR(dparent));
- cleanup_phase = 1; /* filter_parent_unlock(dparent) */
-
- dchild = filter_fid2dentry(obd, dparent, group, next_id);
- if (IS_ERR(dchild))
- GOTO(cleanup, rc = PTR_ERR(dchild));
- cleanup_phase = 2; /* f_dput(dchild) */
-
- if (dchild->d_inode != NULL) {
- /* This would only happen if lastobjid was bad on disk*/
- /* Could also happen if recreating missing obj but it
- * already exists. */
- if (recreate_obj) {
- CERROR("%s: recreating existing object %.*s?\n",
- obd->obd_name, dchild->d_name.len,
- dchild->d_name.name);
- } else {
- /* Use these existing objects if they are
- * zero length. */
- if (i_size_read(dchild->d_inode) == 0) {
- rc = filter_use_existing_obj(obd,dchild,
- &handle, &cleanup_phase);
- if (rc == 0)
- goto set_last_id;
- else
- GOTO(cleanup, rc);
- }
-
- CERROR("%s: Serious error: objid %.*s already "
- "exists; is this filesystem corrupt?\n",
- obd->obd_name, dchild->d_name.len,
- dchild->d_name.name);
- LBUG();
- }
- GOTO(cleanup, rc = -EEXIST);
- }
-
- handle = fsfilt_start_log(obd, dparent->d_inode,
- FSFILT_OP_CREATE, NULL, 1);
- if (IS_ERR(handle))
- GOTO(cleanup, rc = PTR_ERR(handle));
- cleanup_phase = 3;
-
- CDEBUG(D_INODE, "%s: filter_precreate(od->o_seq="LPU64
- ",od->o_id="LPU64")\n", obd->obd_name, group,
- next_id);
-
- /* We mark object SUID+SGID to flag it for accepting UID+GID
- * from client on first write. Currently the permission bits
- * on the OST are never used, so this is OK. */
- rc = ll_vfs_create(dparent->d_inode, dchild,
- S_IFREG | S_ISUID | S_ISGID | 0666, NULL);
- if (rc) {
- CWARN("%s: create failed: rc = %d\n", obd->obd_name,rc);
- if (rc == -ENOSPC) {
- os_ffree = filter_calc_free_inodes(obd);
- if (os_ffree == -1)
- GOTO(cleanup, rc);
-
- if (obd->obd_osfs.os_bavail <
- (obd->obd_osfs.os_blocks >> 10)) {
- if (oa->o_valid & OBD_MD_FLFLAGS) {
- oa->o_flags |= OBD_FL_NOSPC_BLK;
- } else {
- oa->o_valid |= OBD_MD_FLFLAGS;
- oa->o_flags = OBD_FL_NOSPC_BLK;
- }
-
- CWARN("%s: free inode "LPU64"\n",
- obd->obd_name, os_ffree);
- }
- }
- GOTO(cleanup, rc);
- }
-
- if (dchild->d_inode)
- CDEBUG(D_INFO, "objid "LPU64" got inum %lu\n", next_id,
- dchild->d_inode->i_ino);
-
-set_last_id:
- /* Initialize a/c/m time so any client timestamp will always
- * be newer and update the inode. ctime = 0 is also handled
- * specially in fsfilt_ext3_setattr(). See LU-221, LU-1042 */
- iattr.ia_valid = ATTR_ATIME | ATTR_MTIME | ATTR_CTIME;
- LTIME_S(iattr.ia_atime) = 0;
- LTIME_S(iattr.ia_mtime) = 0;
- LTIME_S(iattr.ia_ctime) = 0;
- err = fsfilt_setattr(obd, dchild, handle, &iattr, 0);
- if (err)
- CWARN("%s: unable to initialize a/c/m time of newly "
- "created object %.*s: rc = %d\n",
- obd->obd_name, dchild->d_name.len,
- dchild->d_name.name, err);
-
- if (!recreate_obj) {
- filter_set_last_id(filter, next_id, group);
- err = filter_update_last_objid(obd, group, 0);
- if (err)
- CERROR("%s: unable to write lastobjid "
- "but file created: rc = %d\n",
- obd->obd_name, err);
- }
-
- cleanup:
- switch(cleanup_phase) {
- case 3:
- err = fsfilt_commit(obd, dparent->d_inode, handle, 0);
- if (err) {
- CERROR("error on commit, err = %d\n", err);
- if (!rc)
- rc = err;
- }
- case 2:
- f_dput(dchild);
- case 1:
- filter_parent_unlock(dparent);
- case 0:
- break;
- }
-
- if (rc)
- break;
- if (cfs_time_after(jiffies, enough_time)) {
- i++;
- CDEBUG(D_RPCTRACE,
- "%s: precreate slow - want %d got %d \n",
- obd->obd_name, *num, i);
- break;
- }
- }
- *num = i;
-
- CDEBUG(D_RPCTRACE,
- "%s: created %d objects for group "POSTID" rc %d\n",
- obd->obd_name, i, filter->fo_last_objids[group], group, rc);
-
- RETURN(rc);
-}
-
-int filter_create(const struct lu_env *env, struct obd_export *exp,
- struct obdo *oa, struct lov_stripe_md **ea,
- struct obd_trans_info *oti)
-{
- struct obd_device *obd = exp->exp_obd;
- struct filter_export_data *fed;
- struct filter_obd *filter;
- struct lvfs_run_ctxt saved;
- struct lov_stripe_md *lsm = NULL;
- int rc = 0, diff;
- ENTRY;
-
- CDEBUG(D_INODE, "%s: filter_create(group="LPU64",id="
- LPU64")\n", obd->obd_name, oa->o_seq, oa->o_id);
-
- fed = &exp->exp_filter_data;
- filter = &obd->u.filter;
-
- /* 1.8 client doesn't carry the ocd_group with connect request,
- * so the fed_group will always be zero for 1.8 client. */
- if (!(exp->exp_connect_flags & OBD_CONNECT_FULL20)) {
- if (oa->o_seq != FID_SEQ_OST_MDT0 &&
- oa->o_seq != FID_SEQ_LLOG &&
- oa->o_seq != FID_SEQ_ECHO) {
- CERROR("The request from older client has invalid"
- " group "LPU64"!\n", oa->o_seq);
- RETURN(-EINVAL);
- }
- } else if (fed->fed_group != oa->o_seq) {
- CERROR("%s: this export (nid %s) used object group %d "
- "earlier; now it's trying to use group "LPU64"!"
- " This could be a bug in the MDS. Please report to "
- "http://bugzilla.lustre.org/\n", obd->obd_name,
- obd_export_nid2str(exp), fed->fed_group, oa->o_seq);
- RETURN(-ENOTUNIQ);
- }
-
- if (ea != NULL) {
- lsm = *ea;
- if (lsm == NULL) {
- rc = obd_alloc_memmd(exp, &lsm);
- if (rc < 0)
- RETURN(rc);
- }
- }
-
- obd = exp->exp_obd;
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
-
- if ((oa->o_valid & OBD_MD_FLFLAGS) &&
- (oa->o_flags & OBD_FL_RECREATE_OBJS)) {
- if (!obd->obd_recovering ||
- oa->o_id > filter_last_id(filter, oa->o_seq)) {
- CERROR("recreate objid "LPU64" > last id "LPU64"\n",
- oa->o_id, filter_last_id(filter, oa->o_seq));
- rc = -EINVAL;
- } else {
- diff = 1;
- cfs_mutex_lock(&filter->fo_create_locks[oa->o_seq]);
- rc = filter_precreate(obd, oa, oa->o_seq, &diff);
- cfs_mutex_unlock(&filter->fo_create_locks[oa->o_seq]);
- }
- } else {
- rc = filter_handle_precreate(exp, oa, oa->o_seq, oti);
- }
-
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- if (rc && ea != NULL && *ea != lsm) {
- obd_free_memmd(exp, &lsm);
- } else if (rc == 0 && ea != NULL) {
- /* XXX LOV STACKING: the lsm that is passed to us from
- * LOV does not have valid lsm_oinfo data structs, so
- * don't go touching that. This needs to be fixed in a
- * big way. */
- lsm->lsm_object_id = oa->o_id;
- *ea = lsm;
- }
-
- RETURN(rc);
-}
-
-int filter_destroy(const struct lu_env *env, struct obd_export *exp,
- struct obdo *oa, struct lov_stripe_md *md,
- struct obd_trans_info *oti, struct obd_export *md_exp,
- void *capa)
-{
- struct obd_device *obd;
- struct filter_obd *filter;
- struct dentry *dchild = NULL, *dparent = NULL;
- struct lustre_handle lockh = { 0 };
- struct lvfs_run_ctxt saved;
- void *handle = NULL;
- struct llog_cookie *fcc = NULL;
- int rc, rc2, cleanup_phase = 0, sync = 0;
- struct iattr iattr;
- unsigned long now;
- ENTRY;
-
- rc = filter_auth_capa(exp, NULL, oa->o_seq,
- (struct lustre_capa *)capa, CAPA_OPC_OSS_DESTROY);
- if (rc)
- RETURN(rc);
-
- obd = exp->exp_obd;
- filter = &obd->u.filter;
-
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- cleanup_phase = 1;
-
- CDEBUG(D_INODE, "%s: filter_destroy(group="LPU64",oid="
- LPU64")\n", obd->obd_name, oa->o_seq, oa->o_id);
-
- dchild = filter_fid2dentry(obd, NULL, oa->o_seq, oa->o_id);
- if (IS_ERR(dchild))
- GOTO(cleanup, rc = PTR_ERR(dchild));
- cleanup_phase = 2;
-
- if (dchild->d_inode == NULL) {
- CDEBUG(D_INODE, "destroying non-existent object "POSTID"\n",
- oa->o_id, oa->o_seq);
- /* If object already gone, cancel cookie right now */
- if (oa->o_valid & OBD_MD_FLCOOKIE) {
- struct llog_ctxt *ctxt;
- struct obd_llog_group *olg;
-
- olg = filter_find_olg(obd, oa->o_seq);
- if (!olg) {
- CERROR(" %s: can not find olg of group %d\n",
- obd->obd_name, (int)oa->o_seq);
- GOTO(cleanup, rc = PTR_ERR(olg));
- }
- fcc = &oa->o_lcookie;
- ctxt = llog_group_get_ctxt(olg, fcc->lgc_subsys + 1);
- llog_cancel(NULL, ctxt, NULL, 1, fcc, 0);
- llog_ctxt_put(ctxt);
- fcc = NULL; /* we didn't allocate fcc, don't free it */
- }
- GOTO(cleanup, rc = -ENOENT);
- }
-
- rc = filter_prepare_destroy(obd, oa->o_id, oa->o_seq, &lockh);
- if (rc)
- GOTO(cleanup, rc);
-
- /* Our MDC connection is established by the MDS to us */
- if (oa->o_valid & OBD_MD_FLCOOKIE) {
- OBD_ALLOC(fcc, sizeof(*fcc));
- if (fcc != NULL)
- *fcc = oa->o_lcookie;
- }
-
- /* we're gonna truncate it first in order to avoid possible deadlock:
- * P1 P2
- * open trasaction open transaction
- * down(i_zombie) down(i_zombie)
- * restart transaction
- * (see BUG 4180) -bzzz
- *
- * take i_alloc_sem too to prevent other threads from writing to the
- * file while we are truncating it. This can cause lock ordering issue
- * between page lock, i_mutex & starting new journal handle.
- * (see bug 20321) -johann
- */
- now = jiffies;
- down_write(&dchild->d_inode->i_alloc_sem);
- mutex_lock(&dchild->d_inode->i_mutex);
- fsfilt_check_slow(exp->exp_obd, now, "i_alloc_sem and i_mutex");
-
- /* VBR: version recovery check */
- rc = filter_version_get_check(exp, oti, dchild->d_inode);
- if (rc) {
- mutex_unlock(&dchild->d_inode->i_mutex);
- up_write(&dchild->d_inode->i_alloc_sem);
- GOTO(cleanup, rc);
- }
-
- handle = fsfilt_start_log(obd, dchild->d_inode, FSFILT_OP_SETATTR,
- NULL, 1);
- if (IS_ERR(handle)) {
- mutex_unlock(&dchild->d_inode->i_mutex);
- up_write(&dchild->d_inode->i_alloc_sem);
- GOTO(cleanup, rc = PTR_ERR(handle));
- }
-
- /* Locking order: i_mutex -> journal_lock -> dqptr_sem. LU-952 */
- ll_vfs_dq_init(dchild->d_inode);
-
- iattr.ia_valid = ATTR_SIZE;
- iattr.ia_size = 0;
- rc = fsfilt_setattr(obd, dchild, handle, &iattr, 1);
- rc2 = fsfilt_commit(obd, dchild->d_inode, handle, 0);
- mutex_unlock(&dchild->d_inode->i_mutex);
- up_write(&dchild->d_inode->i_alloc_sem);
- if (rc)
- GOTO(cleanup, rc);
- if (rc2)
- GOTO(cleanup, rc = rc2);
-
- /* We don't actually need to lock the parent until we are unlinking
- * here, and not while truncating above. That avoids holding the
- * parent lock for a long time during truncate, which can block other
- * threads from doing anything to objects in that directory. bug 7171 */
- dparent = filter_parent_lock(obd, oa->o_seq, oa->o_id);
- if (IS_ERR(dparent))
- GOTO(cleanup, rc = PTR_ERR(dparent));
- cleanup_phase = 3; /* filter_parent_unlock */
-
- mutex_lock(&dchild->d_inode->i_mutex);
- handle = fsfilt_start_log(obd, dparent->d_inode,
- FSFILT_OP_UNLINK, oti, 1);
- if (IS_ERR(handle)) {
- mutex_unlock(&dchild->d_inode->i_mutex);
- GOTO(cleanup, rc = PTR_ERR(handle));
- }
- cleanup_phase = 4; /* fsfilt_commit */
-
- /* Quota release need uid/gid of inode */
- obdo_from_inode(oa, dchild->d_inode, OBD_MD_FLUID | OBD_MD_FLGID);
-
- filter_fmd_drop(exp, oa->o_id, oa->o_seq);
-
- /* this drops dchild->d_inode->i_mutex unconditionally */
- rc = filter_destroy_internal(obd, oa->o_id, oa->o_seq, dparent, dchild);
-
- EXIT;
-cleanup:
- switch(cleanup_phase) {
- case 4:
- if (fcc != NULL)
- sync = fsfilt_add_journal_cb(obd, 0, oti ?
- oti->oti_handle : handle,
- filter_cancel_cookies_cb,
- fcc);
- /* If add_journal_cb failed, then filter_finish_transno
- * will commit the handle and we will do a sync
- * on commit. then we call callback directly to free
- * the fcc.
- */
- rc = filter_finish_transno(exp, NULL, oti, rc, sync);
- if (sync) {
- filter_cancel_cookies_cb(obd, 0, fcc, rc);
- fcc = NULL;
- }
- rc2 = fsfilt_commit(obd, dparent->d_inode, handle, 0);
- if (rc2) {
- CERROR("error on commit, err = %d\n", rc2);
- if (!rc)
- rc = rc2;
- } else {
- fcc = NULL;
- }
- case 3:
- filter_parent_unlock(dparent);
- case 2:
- filter_fini_destroy(obd, &lockh);
-
- f_dput(dchild);
- if (fcc != NULL)
- OBD_FREE(fcc, sizeof(*fcc));
- case 1:
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- break;
- default:
- CERROR("invalid cleanup_phase %d\n", cleanup_phase);
- LBUG();
- }
-
- return rc;
-}
-
-/* NB start and end are used for punch, but not truncate */
-static int filter_truncate(const struct lu_env *env, struct obd_export *exp,
- struct obd_info *oinfo, struct obd_trans_info *oti,
- struct ptlrpc_request_set *rqset)
-{
- int rc;
- ENTRY;
-
- if (oinfo->oi_policy.l_extent.end != OBD_OBJECT_EOF) {
- CERROR("PUNCH not supported, only truncate: end = "LPX64"\n",
- oinfo->oi_policy.l_extent.end);
- RETURN(-EFAULT);
- }
-
- CDEBUG(D_INODE, "calling truncate for object "LPU64", valid = "LPX64
- ", o_size = "LPD64"\n", oinfo->oi_oa->o_id,oinfo->oi_oa->o_valid,
- oinfo->oi_policy.l_extent.start);
-
- oinfo->oi_oa->o_size = oinfo->oi_policy.l_extent.start;
- rc = filter_setattr(env, exp, oinfo, oti);
- RETURN(rc);
-}
-
-static int filter_sync(const struct lu_env *env, struct obd_export *exp,
- struct obd_info *oinfo, obd_off start, obd_off end,
- struct ptlrpc_request_set *set)
-{
- struct lvfs_run_ctxt saved;
- struct obd_device_target *obt;
- struct dentry *dentry;
- int rc, rc2;
- ENTRY;
-
- rc = filter_auth_capa(exp, NULL, oinfo->oi_oa->o_seq,
- (struct lustre_capa *)oinfo->oi_capa,
- CAPA_OPC_OSS_WRITE);
- if (rc)
- RETURN(rc);
-
- obt = &exp->exp_obd->u.obt;
-
- /* An objid of zero is taken to mean "sync whole filesystem" */
- if (!oinfo->oi_oa || !(oinfo->oi_oa->o_valid & OBD_MD_FLID)) {
- rc = fsfilt_sync(exp->exp_obd, obt->obt_sb);
- /* Flush any remaining cancel messages out to the target */
- filter_sync_llogs(exp->exp_obd, exp);
- RETURN(rc);
- }
-
- dentry = filter_oa2dentry(exp->exp_obd, &oinfo->oi_oa->o_oi);
- if (IS_ERR(dentry))
- RETURN(PTR_ERR(dentry));
-
- push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
-
- mutex_lock(&dentry->d_inode->i_mutex);
-
- rc = filemap_fdatawrite(dentry->d_inode->i_mapping);
- if (rc == 0) {
- /* just any file to grab fsync method - "file" arg unused */
- struct file *file = obt->obt_rcvd_filp;
-
- if (file->f_op && file->f_op->fsync)
- rc = file->f_op->fsync(NULL, dentry, 1);
-
- rc2 = filemap_fdatawait(dentry->d_inode->i_mapping);
- if (!rc)
- rc = rc2;
- }
- mutex_unlock(&dentry->d_inode->i_mutex);
-
- oinfo->oi_oa->o_valid = OBD_MD_FLID;
- obdo_from_inode(oinfo->oi_oa, dentry->d_inode, FILTER_VALID_FLAGS);
-
- pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
-
- filter_counter_incr(exp, LPROC_FILTER_STATS_SYNC, oinfo->oi_jobid, 1);
- f_dput(dentry);
- RETURN(rc);
-}
-
-static int filter_get_info(const struct lu_env *env, struct obd_export *exp,
- __u32 keylen, void *key, __u32 *vallen, void *val,
- struct lov_stripe_md *lsm)
-{
- struct obd_device *obd;
- ENTRY;
-
- obd = class_exp2obd(exp);
- if (obd == NULL) {
- CDEBUG(D_IOCTL, "invalid client export %p\n", exp);
- RETURN(-EINVAL);
- }
-
- if (KEY_IS(KEY_BLOCKSIZE)) {
- __u32 *blocksize = val;
- if (blocksize) {
- if (*vallen < sizeof(*blocksize))
- RETURN(-EOVERFLOW);
- *blocksize = obd->u.obt.obt_sb->s_blocksize;
- }
- *vallen = sizeof(*blocksize);
- RETURN(0);
- }
-
- if (KEY_IS(KEY_BLOCKSIZE_BITS)) {
- __u32 *blocksize_bits = val;
- if (blocksize_bits) {
- if (*vallen < sizeof(*blocksize_bits))
- RETURN(-EOVERFLOW);
- *blocksize_bits = obd->u.obt.obt_sb->s_blocksize_bits;
- }
- *vallen = sizeof(*blocksize_bits);
- RETURN(0);
- }
-
- if (KEY_IS(KEY_LAST_ID)) {
- obd_id *last_id = val;
- /* FIXME: object groups */
- if (last_id) {
- if (*vallen < sizeof(*last_id))
- RETURN(-EOVERFLOW);
- *last_id = filter_last_id(&obd->u.filter,
- exp->exp_filter_data.fed_group);
- }
- *vallen = sizeof(*last_id);
- RETURN(0);
- }
-
- if (KEY_IS(KEY_FIEMAP)) {
- struct ll_fiemap_info_key *fm_key = key;
- struct dentry *dentry;
- struct ll_user_fiemap *fiemap = val;
- struct lvfs_run_ctxt saved;
- int rc;
-
- if (fiemap == NULL) {
- *vallen = fiemap_count_to_size(
- fm_key->fiemap.fm_extent_count);
- RETURN(0);
- }
-
- dentry = __filter_oa2dentry(exp->exp_obd, &fm_key->oa.o_oi,
- __func__, 1);
- if (IS_ERR(dentry))
- RETURN(PTR_ERR(dentry));
-
- memcpy(fiemap, &fm_key->fiemap, sizeof(*fiemap));
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- rc = fsfilt_iocontrol(obd, dentry, FSFILT_IOC_FIEMAP,
- (long)fiemap);
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
-
- f_dput(dentry);
- RETURN(rc);
- }
-
- if (KEY_IS(KEY_SYNC_LOCK_CANCEL)) {
- *((__u32 *) val) = obd->u.filter.fo_sync_lock_cancel;
- *vallen = sizeof(__u32);
- RETURN(0);
- }
-
- CDEBUG(D_IOCTL, "invalid key\n");
- RETURN(-EINVAL);
-}
-
-static inline int filter_setup_llog_group(struct obd_export *exp,
- struct obd_device *obd,
- int group)
-{
- struct obd_llog_group *olg;
- struct llog_ctxt *ctxt;
- int rc;
-
- olg = filter_find_create_olg(obd, group);
- if (IS_ERR(olg))
- RETURN(PTR_ERR(olg));
-
- llog_group_set_export(olg, exp);
-
- ctxt = llog_group_get_ctxt(olg, LLOG_MDS_OST_REPL_CTXT);
- LASSERTF(ctxt != NULL, "ctxt is null\n");
-
- rc = llog_receptor_accept(ctxt, exp->exp_imp_reverse);
- llog_ctxt_put(ctxt);
- return rc;
-}
-
-static int filter_set_grant_shrink(struct obd_export *exp,
- struct ost_body *body)
-{
- /* handle shrink grant */
- cfs_spin_lock(&exp->exp_obd->obd_osfs_lock);
- filter_grant_incoming(exp, &body->oa);
- cfs_spin_unlock(&exp->exp_obd->obd_osfs_lock);
-
- RETURN(0);
-
-}
-
-static int filter_set_mds_conn(struct obd_export *exp, void *val)
-{
- struct obd_device *obd;
- int rc = 0, group;
- ENTRY;
-
- obd = exp->exp_obd;
- if (obd == NULL) {
- CDEBUG(D_IOCTL, "invalid export %p\n", exp);
- RETURN(-EINVAL);
- }
-
- LCONSOLE_WARN("%s: received MDS connection from %s\n", obd->obd_name,
- obd_export_nid2str(exp));
- obd->u.filter.fo_mdc_conn.cookie = exp->exp_handle.h_cookie;
-
- /* setup llog imports */
- if (val != NULL)
- group = (int)(*(__u32 *)val);
- else
- group = 0; /* default value */
-
- LASSERT_SEQ_IS_MDT(group);
- rc = filter_setup_llog_group(exp, obd, group);
- if (rc)
- goto out;
-
- if (group == FID_SEQ_OST_MDT0) {
- /* setup llog group 1 for interop */
- filter_setup_llog_group(exp, obd, FID_SEQ_LLOG);
- }
-out:
- RETURN(rc);
-}
-
-static int filter_set_info_async(const struct lu_env *env,
- struct obd_export *exp, __u32 keylen,
- void *key, __u32 vallen, void *val,
- struct ptlrpc_request_set *set)
-{
- struct obd_device *obd;
- ENTRY;
-
- obd = exp->exp_obd;
- if (obd == NULL) {
- CDEBUG(D_IOCTL, "invalid export %p\n", exp);
- RETURN(-EINVAL);
- }
-
- if (KEY_IS(KEY_CAPA_KEY)) {
- int rc;
- rc = filter_update_capa_key(obd, (struct lustre_capa_key *)val);
- if (rc)
- CERROR("filter update capability key failed: %d\n", rc);
- RETURN(rc);
- }
-
- if (KEY_IS(KEY_REVIMP_UPD)) {
- filter_revimp_update(exp);
- RETURN(0);
- }
-
- if (KEY_IS(KEY_SPTLRPC_CONF)) {
- filter_adapt_sptlrpc_conf(obd, 0);
- RETURN(0);
- }
-
- if (KEY_IS(KEY_MDS_CONN))
- RETURN(filter_set_mds_conn(exp, val));
-
- if (KEY_IS(KEY_GRANT_SHRINK))
- RETURN(filter_set_grant_shrink(exp, val));
-
- RETURN(-EINVAL);
-}
-
-int filter_iocontrol(unsigned int cmd, struct obd_export *exp,
- int len, void *karg, void *uarg)
-{
- struct obd_device *obd = exp->exp_obd;
- struct obd_ioctl_data *data = karg;
- int rc = 0;
-
- switch (cmd) {
- case OBD_IOC_ABORT_RECOVERY: {
- LCONSOLE_WARN("%s: Aborting recovery.\n", obd->obd_name);
- target_stop_recovery_thread(obd);
- RETURN(0);
- }
-
- case OBD_IOC_SYNC: {
- CDEBUG(D_RPCTRACE, "syncing ost %s\n", obd->obd_name);
- rc = fsfilt_sync(obd, obd->u.obt.obt_sb);
- RETURN(rc);
- }
-
- case OBD_IOC_SET_READONLY: {
- void *handle;
- struct super_block *sb = obd->u.obt.obt_sb;
- struct inode *inode = sb->s_root->d_inode;
- BDEVNAME_DECLARE_STORAGE(tmp);
- CERROR("*** setting device %s read-only ***\n",
- ll_bdevname(sb, tmp));
-
- handle = fsfilt_start(obd, inode, FSFILT_OP_MKNOD, NULL);
- if (!IS_ERR(handle))
- rc = fsfilt_commit(obd, inode, handle, 1);
-
- CDEBUG(D_HA, "syncing ost %s\n", obd->obd_name);
- rc = fsfilt_sync(obd, obd->u.obt.obt_sb);
-
- rc = lvfs_set_rdonly(obd, obd->u.obt.obt_sb);
- RETURN(rc);
- }
-
- case OBD_IOC_CATLOGLIST: {
- rc = llog_catalog_list(obd, 1, data);
- RETURN(rc);
- }
-
- case OBD_IOC_LLOG_CANCEL:
- case OBD_IOC_LLOG_REMOVE:
- case OBD_IOC_LLOG_INFO:
- case OBD_IOC_LLOG_PRINT: {
- /* FIXME to be finished */
- RETURN(-EOPNOTSUPP);
-/*
- struct llog_ctxt *ctxt = NULL;
-
- push_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_lvfs_ctxt, NULL);
- rc = llog_ioctl(ctxt, cmd, data);
- pop_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_lvfs_ctxt, NULL);
-
- RETURN(rc);
-*/
- }
-
-
- default:
- RETURN(-EINVAL);
- }
- RETURN(0);
-}
-
-static int filter_health_check(const struct lu_env *env, struct obd_device *obd)
-{
-#ifdef USE_HEALTH_CHECK_WRITE
- struct filter_obd *filter = &obd->u.filter;
-#endif
- int rc = 0;
-
- /*
- * health_check to return 0 on healthy
- * and 1 on unhealthy.
- */
- if (obd->u.obt.obt_sb->s_flags & MS_RDONLY)
- rc = 1;
-
-#ifdef USE_HEALTH_CHECK_WRITE
- LASSERT(filter->fo_obt.obt_health_check_filp != NULL);
- rc |= !!lvfs_check_io_health(obd, filter->fo_obt.obt_health_check_filp);
-#endif
- return rc;
-}
-
-static struct dentry *filter_lvfs_fid2dentry(__u64 id, __u32 gen, __u64 gr,
- void *data)
-{
- return filter_fid2dentry(data, NULL, gr, id);
-}
-
-static int filter_process_config(struct obd_device *obd, obd_count len,
- void *buf)
-{
- struct lustre_cfg *lcfg = buf;
- struct lprocfs_static_vars lvars;
- int rc = 0;
-
- switch (lcfg->lcfg_command) {
- default:
- lprocfs_filter_init_vars(&lvars);
-
- rc = class_process_proc_param(PARAM_OST, lvars.obd_vars,
- lcfg, obd);
- if (rc > 0)
- rc = 0;
- break;
- }
-
- return rc;
-}
-
-static int filter_notify(struct obd_device *obd,
- struct obd_device *unused,
- enum obd_notify_event ev, void *data)
-{
- switch (ev) {
- case OBD_NOTIFY_CONFIG:
- LASSERT(obd->obd_no_conn);
- cfs_spin_lock(&obd->obd_dev_lock);
- obd->obd_no_conn = 0;
- cfs_spin_unlock(&obd->obd_dev_lock);
- break;
- default:
- CDEBUG(D_INFO, "%s: Unhandled notification %#x\n",
- obd->obd_name, ev);
- }
- return 0;
-}
-
-static struct lvfs_callback_ops filter_lvfs_ops = {
- l_fid2dentry: filter_lvfs_fid2dentry,
-};
-
-static struct obd_ops filter_obd_ops = {
- .o_owner = THIS_MODULE,
- .o_get_info = filter_get_info,
- .o_set_info_async = filter_set_info_async,
- .o_setup = filter_setup,
- .o_precleanup = filter_precleanup,
- .o_cleanup = filter_cleanup,
- .o_connect = filter_connect,
- .o_reconnect = filter_reconnect,
- .o_disconnect = filter_disconnect,
- .o_ping = filter_ping,
- .o_init_export = filter_init_export,
- .o_destroy_export = filter_destroy_export,
- .o_statfs = filter_statfs,
- .o_getattr = filter_getattr,
- .o_unpackmd = filter_unpackmd,
- .o_create = filter_create,
- .o_setattr = filter_setattr,
- .o_destroy = filter_destroy,
- .o_punch = filter_truncate,
- .o_sync = filter_sync,
- .o_preprw = filter_preprw,
- .o_commitrw = filter_commitrw,
- .o_llog_init = filter_llog_init,
- .o_llog_connect = filter_llog_connect,
- .o_llog_finish = filter_llog_finish,
- .o_iocontrol = filter_iocontrol,
- .o_health_check = filter_health_check,
- .o_process_config = filter_process_config,
- .o_notify = filter_notify,
-};
-
-static int __init obdfilter_init(void)
-{
- struct lprocfs_static_vars lvars;
- int rc, i;
-
- /** sanity check for group<->mdsno conversion */
- for (i = 0; i < MAX_MDT_COUNT; i++)
- LASSERT(objseq_to_mdsno(mdt_to_obd_objseq(i)) == i);
-
- lprocfs_filter_init_vars(&lvars);
-
- OBD_ALLOC(obdfilter_created_scratchpad,
- OBDFILTER_CREATED_SCRATCHPAD_ENTRIES *
- sizeof(*obdfilter_created_scratchpad));
- if (obdfilter_created_scratchpad == NULL)
- return -ENOMEM;
-
- ll_fmd_cachep = cfs_mem_cache_create("ll_fmd_cache",
- sizeof(struct filter_mod_data),
- 0, 0);
- if (!ll_fmd_cachep)
- GOTO(out, rc = -ENOMEM);
-
- rc = class_register_type(&filter_obd_ops, NULL, lvars.module_vars,
- LUSTRE_OST_NAME, NULL);
- if (rc) {
- int err;
-
- err = cfs_mem_cache_destroy(ll_fmd_cachep);
- LASSERTF(err == 0, "Cannot destroy ll_fmd_cachep: rc %d\n",err);
- ll_fmd_cachep = NULL;
-out:
- OBD_FREE(obdfilter_created_scratchpad,
- OBDFILTER_CREATED_SCRATCHPAD_ENTRIES *
- sizeof(*obdfilter_created_scratchpad));
- }
-
- return rc;
-}
-
-static void __exit obdfilter_exit(void)
-{
- if (ll_fmd_cachep) {
- int rc = cfs_mem_cache_destroy(ll_fmd_cachep);
- LASSERTF(rc == 0, "Cannot destroy ll_fmd_cachep: rc %d\n", rc);
- ll_fmd_cachep = NULL;
- }
-
- class_unregister_type(LUSTRE_OST_NAME);
- OBD_FREE(obdfilter_created_scratchpad,
- OBDFILTER_CREATED_SCRATCHPAD_ENTRIES *
- sizeof(*obdfilter_created_scratchpad));
-}
-
-MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
-MODULE_DESCRIPTION("Lustre Filtering OBD driver");
-MODULE_LICENSE("GPL");
-
-module_init(obdfilter_init);
-module_exit(obdfilter_exit);
+++ /dev/null
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lustre/obdfilter/filter_io.c
- *
- * Author: Peter Braam <braam@clusterfs.com>
- * Author: Andreas Dilger <adilger@clusterfs.com>
- * Author: Phil Schwan <phil@clusterfs.com>
- */
-
-#define DEBUG_SUBSYSTEM S_FILTER
-
-#include <linux/module.h>
-#include <linux/pagemap.h> // XXX kill me soon
-#include <linux/version.h>
-
-#include <obd_class.h>
-#include <obd_ost.h>
-#include <lustre_fsfilt.h>
-#include "filter_internal.h"
-
-int *obdfilter_created_scratchpad;
-
-/* Grab the dirty and seen grant announcements from the incoming obdo.
- * We will later calculate the clients new grant and return it.
- * Caller must hold osfs lock */
-void filter_grant_incoming(struct obd_export *exp, struct obdo *oa)
-{
- struct filter_export_data *fed;
- struct obd_device *obd = exp->exp_obd;
- ENTRY;
-
- LASSERT_SPIN_LOCKED(&obd->obd_osfs_lock);
-
- if ((oa->o_valid & (OBD_MD_FLBLOCKS|OBD_MD_FLGRANT)) !=
- (OBD_MD_FLBLOCKS|OBD_MD_FLGRANT)) {
- oa->o_valid &= ~OBD_MD_FLGRANT;
- EXIT;
- return;
- }
-
- fed = &exp->exp_filter_data;
-
- /* Add some margin, since there is a small race if other RPCs arrive
- * out-or-order and have already consumed some grant. We want to
- * leave this here in case there is a large error in accounting. */
- CDEBUG(D_CACHE,
- "%s: cli %s/%p reports grant: "LPU64" dropped: %u, local: %lu\n",
- obd->obd_name, exp->exp_client_uuid.uuid, exp, oa->o_grant,
- oa->o_dropped, fed->fed_grant);
-
- /* Update our accounting now so that statfs takes it into account.
- * Note that fed_dirty is only approximate and can become incorrect
- * if RPCs arrive out-of-order. No important calculations depend
- * on fed_dirty however, but we must check sanity to not assert. */
- if ((long long)oa->o_dirty < 0)
- oa->o_dirty = 0;
- else if (oa->o_dirty > fed->fed_grant + 4 * FILTER_GRANT_CHUNK)
- oa->o_dirty = fed->fed_grant + 4 * FILTER_GRANT_CHUNK;
- obd->u.filter.fo_tot_dirty += oa->o_dirty - fed->fed_dirty;
- if (fed->fed_grant < oa->o_dropped) {
- CDEBUG(D_CACHE,"%s: cli %s/%p reports %u dropped > grant %lu\n",
- obd->obd_name, exp->exp_client_uuid.uuid, exp,
- oa->o_dropped, fed->fed_grant);
- oa->o_dropped = 0;
- }
- if (obd->u.filter.fo_tot_granted < oa->o_dropped) {
- CERROR("%s: cli %s/%p reports %u dropped > tot_grant "LPU64"\n",
- obd->obd_name, exp->exp_client_uuid.uuid, exp,
- oa->o_dropped, obd->u.filter.fo_tot_granted);
- oa->o_dropped = 0;
- }
- obd->u.filter.fo_tot_granted -= oa->o_dropped;
- fed->fed_grant -= oa->o_dropped;
- fed->fed_dirty = oa->o_dirty;
-
- if (oa->o_valid & OBD_MD_FLFLAGS && oa->o_flags & OBD_FL_SHRINK_GRANT) {
- obd_size left_space = filter_grant_space_left(exp);
- struct filter_obd *filter = &exp->exp_obd->u.filter;
-
- /*Only if left_space < fo_tot_clients * 32M,
- *then the grant space could be shrinked */
- if (left_space < filter->fo_tot_granted_clients *
- FILTER_GRANT_SHRINK_LIMIT) {
- fed->fed_grant -= oa->o_grant;
- filter->fo_tot_granted -= oa->o_grant;
- CDEBUG(D_CACHE, "%s: cli %s/%p shrink "LPU64
- "fed_grant %ld total "LPU64"\n",
- obd->obd_name, exp->exp_client_uuid.uuid,
- exp, oa->o_grant, fed->fed_grant,
- filter->fo_tot_granted);
- oa->o_grant = 0;
- }
- }
-
- if (fed->fed_dirty < 0 || fed->fed_grant < 0 || fed->fed_pending < 0) {
- CERROR("%s: cli %s/%p dirty %ld pend %ld grant %ld\n",
- obd->obd_name, exp->exp_client_uuid.uuid, exp,
- fed->fed_dirty, fed->fed_pending, fed->fed_grant);
- cfs_spin_unlock(&obd->obd_osfs_lock);
- LBUG();
- }
- EXIT;
-}
-
-/* Figure out how much space is available between what we've granted
- * and what remains in the filesystem. Compensate for ext3 indirect
- * block overhead when computing how much free space is left ungranted.
- *
- * Caller must hold obd_osfs_lock. */
-obd_size filter_grant_space_left(struct obd_export *exp)
-{
- struct obd_device *obd = exp->exp_obd;
- int blockbits = obd->u.obt.obt_sb->s_blocksize_bits;
- obd_size tot_granted = obd->u.filter.fo_tot_granted, avail, left = 0;
- int rc, statfs_done = 0;
-
- LASSERT_SPIN_LOCKED(&obd->obd_osfs_lock);
-
- if (cfs_time_before_64(obd->obd_osfs_age,
- cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS))) {
-restat:
- rc = fsfilt_statfs(obd, obd->u.obt.obt_sb,
- cfs_time_shift_64(OBD_STATFS_CACHE_SECONDS));
- if (rc) /* N.B. statfs can't really fail */
- RETURN(0);
- statfs_done = 1;
- }
-
- avail = obd->obd_osfs.os_bavail;
- left = avail - (avail >> (blockbits - 3)); /* (d)indirect */
- if (left > GRANT_FOR_LLOG(obd)) {
- left = (left - GRANT_FOR_LLOG(obd)) << blockbits;
- } else {
- left = 0 /* << blockbits */;
- }
-
- if (!statfs_done && left < 32 * FILTER_GRANT_CHUNK + tot_granted) {
- CDEBUG(D_CACHE, "fs has no space left and statfs too old\n");
- goto restat;
- }
-
- if (left >= tot_granted) {
- left -= tot_granted;
- } else {
- if (left < tot_granted - obd->u.filter.fo_tot_pending) {
- CERROR("%s: cli %s/%p grant "LPU64" > available "
- LPU64" and pending "LPU64"\n", obd->obd_name,
- exp->exp_client_uuid.uuid, exp, tot_granted,
- left, obd->u.filter.fo_tot_pending);
- }
- left = 0;
- }
-
- CDEBUG(D_CACHE, "%s: cli %s/%p free: "LPU64" avail: "LPU64" grant "LPU64
- " left: "LPU64" pending: "LPU64"\n", obd->obd_name,
- exp->exp_client_uuid.uuid, exp,
- obd->obd_osfs.os_bfree << blockbits, avail << blockbits,
- tot_granted, left, obd->u.filter.fo_tot_pending);
-
- return left;
-}
-
-/* Calculate how much grant space to allocate to this client, based on how
- * much space is currently free and how much of that is already granted.
- *
- * if @conservative != 0, we limit the maximum grant to FILTER_GRANT_CHUNK;
- * otherwise we'll satisfy the requested amount as possible as we can, this
- * is usually due to client reconnect.
- *
- * Caller must hold obd_osfs_lock. */
-long filter_grant(struct obd_export *exp, obd_size current_grant,
- obd_size want, obd_size fs_space_left, int conservative)
-{
- struct obd_device *obd = exp->exp_obd;
- struct filter_export_data *fed = &exp->exp_filter_data;
- int blockbits = obd->u.obt.obt_sb->s_blocksize_bits;
- __u64 grant = 0;
-
- LASSERT_SPIN_LOCKED(&obd->obd_osfs_lock);
-
- /* Grant some fraction of the client's requested grant space so that
- * they are not always waiting for write credits (not all of it to
- * avoid overgranting in face of multiple RPCs in flight). This
- * essentially will be able to control the OSC_MAX_RIF for a client.
- *
- * If we do have a large disparity between what the client thinks it
- * has and what we think it has, don't grant very much and let the
- * client consume its grant first. Either it just has lots of RPCs
- * in flight, or it was evicted and its grants will soon be used up. */
- if (want > 0x7fffffff) {
- CERROR("%s: client %s/%p requesting > 2GB grant "LPU64"\n",
- obd->obd_name, exp->exp_client_uuid.uuid, exp, want);
- } else if (current_grant < want &&
- current_grant < fed->fed_grant + FILTER_GRANT_CHUNK) {
- grant = min(want + (1 << blockbits) - 1, fs_space_left / 8);
- grant &= ~((1ULL << blockbits) - 1);
-
- if (grant) {
- if (grant > FILTER_GRANT_CHUNK && conservative)
- grant = FILTER_GRANT_CHUNK;
-
- obd->u.filter.fo_tot_granted += grant;
- fed->fed_grant += grant;
- if (fed->fed_grant < 0) {
- CERROR("%s: cli %s/%p grant %ld want "LPU64
- "current"LPU64"\n",
- obd->obd_name, exp->exp_client_uuid.uuid,
- exp, fed->fed_grant, want,current_grant);
- cfs_spin_unlock(&obd->obd_osfs_lock);
- LBUG();
- }
- }
- }
-
- CDEBUG(D_CACHE,
- "%s: cli %s/%p wants: "LPU64" current grant "LPU64
- " granting: "LPU64"\n", obd->obd_name, exp->exp_client_uuid.uuid,
- exp, want, current_grant, grant);
- CDEBUG(D_CACHE,
- "%s: cli %s/%p tot cached:"LPU64" granted:"LPU64
- " num_exports: %d\n", obd->obd_name, exp->exp_client_uuid.uuid,
- exp, obd->u.filter.fo_tot_dirty,
- obd->u.filter.fo_tot_granted, obd->obd_num_exports);
-
- return grant;
-}
-
-/*
- * the routine is used to request pages from pagecache
- *
- * use GFP_NOFS for requests from a local client not allowing to enter FS
- * as we might end up waiting on a page he sent in the request we're serving.
- * use __GFP_HIGHMEM so that the pages can use all of the available memory
- * on 32-bit machines
- * use more aggressive GFP_HIGHUSER flags from non-local clients to be able to
- * generate more memory pressure.
- *
- * See Bug 19529 and Bug 19917 for details.
- */
-static struct page *filter_get_page(struct obd_device *obd,
- struct inode *inode,
- obd_off offset,
- int localreq)
-{
- struct page *page;
-
- page = find_or_create_page(inode->i_mapping, offset >> CFS_PAGE_SHIFT,
- (localreq ? (GFP_NOFS | __GFP_HIGHMEM)
- : GFP_HIGHUSER));
- if (unlikely(page == NULL))
- lprocfs_counter_add(obd->obd_stats, LPROC_FILTER_NO_PAGE, 1);
-
- return page;
-}
-
-/*
- * the routine initializes array of local_niobuf from remote_niobuf
- */
-static int filter_map_remote_to_local(int objcount, struct obd_ioobj *obj,
- struct niobuf_remote *nb,
- int *nrpages, struct niobuf_local *res)
-{
- struct niobuf_remote *rnb;
- struct niobuf_local *lnb;
- int i, max;
- ENTRY;
-
- /* we don't support multiobject RPC yet
- * ost_brw_read() and ost_brw_write() check this */
- LASSERT(objcount == 1);
-
- max = *nrpages;
- *nrpages = 0;
- for (i = 0, rnb = nb, lnb = res; i < obj->ioo_bufcnt; i++, rnb++) {
- obd_off offset = rnb->offset;
- unsigned int len = rnb->len;
-
- while (len > 0) {
- int poff = offset & (CFS_PAGE_SIZE - 1);
- int plen = CFS_PAGE_SIZE - poff;
-
- if (*nrpages >= max) {
- CERROR("small array of local bufs: %d\n", max);
- RETURN(-EINVAL);
- }
-
- if (plen > len)
- plen = len;
- lnb->lnb_file_offset = offset;
- lnb->lnb_page_offset = poff;
- lnb->len = plen;
- lnb->flags = rnb->flags;
- lnb->page = NULL;
- lnb->rc = 0;
- lnb->lnb_grant_used = 0;
-
- LASSERTF(plen <= len, "plen %u, len %u\n", plen, len);
- offset += plen;
- len -= plen;
- lnb++;
- (*nrpages)++;
- }
- }
- RETURN(0);
-}
-
-/*
- * the invalidate above doesn't work during read because lnet pins pages.
- * The truncate is used here instead to drop pages from cache
- */
-void filter_release_cache(struct obd_device *obd, struct obd_ioobj *obj,
- struct niobuf_remote *rnb, struct inode *inode)
-{
- int i;
-
- LASSERT(inode != NULL);
- for (i = 0; i < obj->ioo_bufcnt; i++, rnb++) {
- /* remove pages in which range is fit */
- truncate_inode_pages_range(inode->i_mapping,
- rnb->offset & CFS_PAGE_MASK,
- (rnb->offset + rnb->len - 1) |
- ~CFS_PAGE_MASK);
- }
-}
-
-static int filter_preprw_read(int cmd, struct obd_export *exp, struct obdo *oa,
- int objcount, struct obd_ioobj *obj,
- struct niobuf_remote *nb,
- int *npages, struct niobuf_local *res,
- struct obd_trans_info *oti,
- struct lustre_capa *capa)
-{
- struct obd_device *obd = exp->exp_obd;
- struct timeval start, end;
- struct lvfs_run_ctxt saved;
- struct niobuf_local *lnb;
- struct dentry *dentry = NULL;
- struct inode *inode = NULL;
- void *iobuf = NULL;
- int rc = 0, i, tot_bytes = 0;
- unsigned long now = jiffies;
- long timediff;
- loff_t isize;
- ENTRY;
-
- /* We are currently not supporting multi-obj BRW_READ RPCS at all.
- * When we do this function's dentry cleanup will need to be fixed.
- * These values are verified in ost_brw_write() from the wire. */
- LASSERTF(objcount == 1, "%d\n", objcount);
- LASSERTF(obj->ioo_bufcnt > 0, "%d\n", obj->ioo_bufcnt);
-
- rc = filter_auth_capa(exp, NULL, oa->o_seq, capa,
- CAPA_OPC_OSS_READ);
- if (rc)
- RETURN(rc);
-
- if (oa && oa->o_valid & OBD_MD_FLGRANT) {
- cfs_spin_lock(&obd->obd_osfs_lock);
- filter_grant_incoming(exp, oa);
-
- if (!(oa->o_valid & OBD_MD_FLFLAGS) ||
- !(oa->o_flags & OBD_FL_SHRINK_GRANT))
- oa->o_grant = 0;
- cfs_spin_unlock(&obd->obd_osfs_lock);
- }
-
- iobuf = filter_iobuf_get(&obd->u.filter, oti);
- if (IS_ERR(iobuf))
- RETURN(PTR_ERR(iobuf));
-
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- dentry = filter_oa2dentry(obd, &oa->o_oi);
- if (IS_ERR(dentry)) {
- rc = PTR_ERR(dentry);
- dentry = NULL;
- GOTO(cleanup, rc);
- }
-
- inode = dentry->d_inode;
- isize = i_size_read(inode);
-
- obdo_to_inode(inode, oa, OBD_MD_FLATIME);
-
- rc = filter_map_remote_to_local(objcount, obj, nb, npages, res);
- if (rc)
- GOTO(cleanup, rc);
-
- fsfilt_check_slow(obd, now, "preprw_read setup");
-
- /* find pages for all segments, fill array with them */
- cfs_gettimeofday(&start);
- for (i = 0, lnb = res; i < *npages; i++, lnb++) {
-
- lnb->dentry = dentry;
-
- if (isize <= lnb->lnb_file_offset)
- /* If there's no more data, abort early. lnb->rc == 0,
- * so it's easy to detect later. */
- break;
-
- lnb->page = filter_get_page(obd, inode, lnb->lnb_file_offset,
- 0);
- if (lnb->page == NULL)
- GOTO(cleanup, rc = -ENOMEM);
-
- lprocfs_counter_add(obd->obd_stats, LPROC_FILTER_CACHE_ACCESS, 1);
-
- if (isize < lnb->lnb_file_offset + lnb->len - 1)
- lnb->rc = isize - lnb->lnb_file_offset;
- else
- lnb->rc = lnb->len;
-
- tot_bytes += lnb->rc;
-
- if (PageUptodate(lnb->page)) {
- lprocfs_counter_add(obd->obd_stats,
- LPROC_FILTER_CACHE_HIT, 1);
- continue;
- }
-
- lprocfs_counter_add(obd->obd_stats, LPROC_FILTER_CACHE_MISS, 1);
- filter_iobuf_add_page(obd, iobuf, inode, lnb->page);
- }
- cfs_gettimeofday(&end);
- timediff = cfs_timeval_sub(&end, &start, NULL);
- lprocfs_counter_add(obd->obd_stats, LPROC_FILTER_GET_PAGE, timediff);
-
- if (OBD_FAIL_CHECK(OBD_FAIL_OST_NOMEM))
- GOTO(cleanup, rc = -ENOMEM);
-
- fsfilt_check_slow(obd, now, "start_page_read");
-
- rc = filter_direct_io(OBD_BRW_READ, dentry, iobuf,
- exp, NULL, NULL, NULL);
- if (rc)
- GOTO(cleanup, rc);
-
- lprocfs_counter_add(obd->obd_stats, LPROC_FILTER_READ_BYTES, tot_bytes);
-
- if (exp->exp_nid_stats && exp->exp_nid_stats->nid_stats)
- lprocfs_counter_add(exp->exp_nid_stats->nid_stats,
- LPROC_FILTER_READ_BYTES, tot_bytes);
- filter_counter_incr(exp, LPROC_FILTER_STATS_READ,
- oti ? oti->oti_jobid : NULL, tot_bytes);
- EXIT;
-
- cleanup:
- /* unlock pages to allow access from concurrent OST_READ */
- for (i = 0, lnb = res; i < *npages; i++, lnb++) {
- if (lnb->page) {
- LASSERT(PageLocked(lnb->page));
- unlock_page(lnb->page);
-
- if (rc) {
- page_cache_release(lnb->page);
- lnb->page = NULL;
- }
- }
- }
-
- if (rc != 0) {
- if (dentry != NULL)
- f_dput(dentry);
- }
-
- filter_iobuf_put(&obd->u.filter, iobuf, oti);
-
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- if (rc)
- CERROR("io error %d\n", rc);
-
- return rc;
-}
-
-/* When clients have dirtied as much space as they've been granted they
- * fall through to sync writes. These sync writes haven't been expressed
- * in grants and need to error with ENOSPC when there isn't room in the
- * filesystem for them after grants are taken into account. However,
- * writeback of the dirty data that was already granted space can write
- * right on through.
- *
- * Caller must hold obd_osfs_lock. */
-static int filter_grant_check(struct obd_export *exp, struct obdo *oa,
- int objcount, struct fsfilt_objinfo *fso,
- int niocount, struct niobuf_local *lnb,
- obd_size *left, struct inode *inode)
-{
- struct filter_export_data *fed = &exp->exp_filter_data;
- int blocksize = exp->exp_obd->u.obt.obt_sb->s_blocksize;
- unsigned long used = 0, ungranted = 0, using;
- int i, rc = -ENOSPC, obj, n = 0;
- int resend = 0;
-
- if ((oa->o_valid & OBD_MD_FLFLAGS) &&
- (oa->o_flags & OBD_FL_RECOV_RESEND)) {
- resend = 1;
- CDEBUG(D_CACHE, "Recoverable resend arrived, skipping "
- "accounting\n");
- }
-
- LASSERT_SPIN_LOCKED(&exp->exp_obd->obd_osfs_lock);
-
- for (obj = 0; obj < objcount; obj++) {
- for (i = 0; i < fso[obj].fso_bufcnt; i++, n++) {
- int tmp, bytes;
-
- /* should match the code in osc_exit_cache */
- bytes = lnb[n].len;
- bytes += lnb[n].lnb_file_offset & (blocksize - 1);
- tmp = (lnb[n].lnb_file_offset + lnb[n].len) &
- (blocksize - 1);
- if (tmp)
- bytes += blocksize - tmp;
-
- lnb[n].rc = 0;
- if ((lnb[n].flags & OBD_BRW_FROM_GRANT) &&
- (oa->o_valid & OBD_MD_FLGRANT)) {
- if (resend) {
- /* this is a recoverable resent */
- lnb[n].flags |= OBD_BRW_GRANTED;
- rc = 0;
- continue;
- } else if (fed->fed_grant < used + bytes) {
- CDEBUG(D_CACHE,
- "%s: cli %s/%p claims %ld+%d "
- "GRANT, real grant %lu idx %d\n",
- exp->exp_obd->obd_name,
- exp->exp_client_uuid.uuid, exp,
- used, bytes, fed->fed_grant, n);
- } else {
- used += bytes;
- lnb[n].flags |= OBD_BRW_GRANTED;
- lnb[n].lnb_grant_used = bytes;
- CDEBUG(0, "idx %d used=%lu\n", n, used);
- rc = 0;
- continue;
- }
- }
- if (*left > ungranted + bytes) {
- /* if enough space, pretend it was granted */
- ungranted += bytes;
- lnb[n].flags |= OBD_BRW_GRANTED;
- lnb[n].lnb_grant_used = bytes;
- CDEBUG(0, "idx %d ungranted=%lu\n",n,ungranted);
- rc = 0;
- continue;
- }
-
- /* We can't check for already-mapped blocks here, as
- * it requires dropping the osfs lock to do the bmap.
- * Instead, we return ENOSPC and in that case we need
- * to go through and verify if all of the blocks not
- * marked BRW_GRANTED are already mapped and we can
- * ignore this error. */
- lnb[n].rc = -ENOSPC;
- lnb[n].flags &= ~OBD_BRW_GRANTED;
- CDEBUG(D_CACHE,"%s: cli %s/%p idx %d no space for %d\n",
- exp->exp_obd->obd_name,
- exp->exp_client_uuid.uuid, exp, n, bytes);
- }
- }
-
- /* Now substract what client have used already. We don't subtract
- * this from the tot_granted yet, so that other client's can't grab
- * that space before we have actually allocated our blocks. That
- * happens in filter_grant_commit() after the writes are done. */
- *left -= ungranted;
- fed->fed_grant -= used;
- fed->fed_pending += used + ungranted;
- exp->exp_obd->u.filter.fo_tot_granted += ungranted;
- exp->exp_obd->u.filter.fo_tot_pending += used + ungranted;
-
- CDEBUG(D_CACHE,
- "%s: cli %s/%p used: %lu ungranted: %lu grant: %lu dirty: %lu\n",
- exp->exp_obd->obd_name, exp->exp_client_uuid.uuid, exp, used,
- ungranted, fed->fed_grant, fed->fed_dirty);
-
- /* Rough calc in case we don't refresh cached statfs data */
- using = (used + ungranted + 1 ) >>
- exp->exp_obd->u.obt.obt_sb->s_blocksize_bits;
- if (exp->exp_obd->obd_osfs.os_bavail > using)
- exp->exp_obd->obd_osfs.os_bavail -= using;
- else
- exp->exp_obd->obd_osfs.os_bavail = 0;
-
- if (fed->fed_dirty < used) {
- CERROR("%s: cli %s/%p claims used %lu > fed_dirty %lu\n",
- exp->exp_obd->obd_name, exp->exp_client_uuid.uuid, exp,
- used, fed->fed_dirty);
- used = fed->fed_dirty;
- }
- exp->exp_obd->u.filter.fo_tot_dirty -= used;
- fed->fed_dirty -= used;
-
- if (fed->fed_dirty < 0 || fed->fed_grant < 0 || fed->fed_pending < 0) {
- CERROR("%s: cli %s/%p dirty %ld pend %ld grant %ld\n",
- exp->exp_obd->obd_name, exp->exp_client_uuid.uuid, exp,
- fed->fed_dirty, fed->fed_pending, fed->fed_grant);
- cfs_spin_unlock(&exp->exp_obd->obd_osfs_lock);
- LBUG();
- }
- return rc;
-}
-
-/* If we ever start to support multi-object BRW RPCs, we will need to get locks
- * on mulitple inodes. That isn't all, because there still exists the
- * possibility of a truncate starting a new transaction while holding the ext3
- * rwsem = write while some writes (which have started their transactions here)
- * blocking on the ext3 rwsem = read => lock inversion.
- *
- * The handling gets very ugly when dealing with locked pages. It may be easier
- * to just get rid of the locked page code (which has problems of its own) and
- * either discover we do not need it anymore (i.e. it was a symptom of another
- * bug) or ensure we get the page locks in an appropriate order. */
-static int filter_preprw_write(int cmd, struct obd_export *exp, struct obdo *oa,
- int objcount, struct obd_ioobj *obj,
- struct niobuf_remote *nb, int *npages,
- struct niobuf_local *res,
- struct obd_trans_info *oti,
- struct lustre_capa *capa)
-{
- struct obd_device *obd = exp->exp_obd;
- struct timeval start, end;
- struct lvfs_run_ctxt saved;
- struct niobuf_local *lnb = res;
- struct fsfilt_objinfo fso;
- struct filter_mod_data *fmd;
- struct dentry *dentry = NULL;
- void *iobuf;
- obd_size left;
- unsigned long now = jiffies, timediff;
- int rc = 0, i, tot_bytes = 0, cleanup_phase = 0, localreq = 0;
- int retries = 0;
- ENTRY;
- LASSERT(objcount == 1);
- LASSERT(obj->ioo_bufcnt > 0);
-
- rc = filter_auth_capa(exp, NULL, oa->o_seq, capa,
- CAPA_OPC_OSS_WRITE);
- if (rc)
- RETURN(rc);
-
- if (exp->exp_connection &&
- exp->exp_connection->c_peer.nid == exp->exp_connection->c_self)
- localreq = 1;
-
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- iobuf = filter_iobuf_get(&obd->u.filter, oti);
- if (IS_ERR(iobuf))
- GOTO(cleanup, rc = PTR_ERR(iobuf));
- cleanup_phase = 1;
-
- dentry = filter_fid2dentry(obd, NULL, obj->ioo_seq,
- obj->ioo_id);
- if (IS_ERR(dentry))
- GOTO(cleanup, rc = PTR_ERR(dentry));
- cleanup_phase = 2;
-
- if (dentry->d_inode == NULL) {
- if (exp->exp_obd->obd_recovering) {
- struct obdo *noa = oa;
-
- if (oa == NULL) {
- OBDO_ALLOC(noa);
- if (noa == NULL)
- GOTO(recreate_out, rc = -ENOMEM);
- noa->o_id = obj->ioo_id;
- noa->o_valid = OBD_MD_FLID;
- }
-
- if (filter_create(NULL, exp, noa, NULL, oti) == 0) {
- f_dput(dentry);
- dentry = filter_fid2dentry(exp->exp_obd, NULL,
- obj->ioo_seq,
- obj->ioo_id);
- }
- if (oa == NULL)
- OBDO_FREE(noa);
- }
- recreate_out:
- if (IS_ERR(dentry) || dentry->d_inode == NULL) {
- CERROR("%s: BRW to missing obj "LPU64"/"LPU64":rc %d\n",
- exp->exp_obd->obd_name,
- obj->ioo_id, obj->ioo_seq,
- IS_ERR(dentry) ? (int)PTR_ERR(dentry) : -ENOENT);
- if (IS_ERR(dentry))
- cleanup_phase = 1;
- GOTO(cleanup, rc = -ENOENT);
- }
- }
-
- if (oa->o_valid & (OBD_MD_FLUID | OBD_MD_FLGID) &&
- dentry->d_inode->i_mode & (S_ISUID | S_ISGID)) {
- rc = filter_capa_fixoa(exp, oa, oa->o_seq, capa);
- if (rc)
- GOTO(cleanup, rc);
- }
-
- rc = filter_map_remote_to_local(objcount, obj, nb, npages, res);
- if (rc)
- GOTO(cleanup, rc);
-
- fsfilt_check_slow(obd, now, "preprw_write setup");
-
- /* Filter truncate first locks i_mutex then partially truncated
- * page, filter write code first locks pages then take
- * i_mutex. To avoid a deadlock in case of concurrent
- * punch/write requests from one client, filter writes and
- * filter truncates are serialized by i_alloc_sem, allowing
- * multiple writes or single truncate. */
- down_read(&dentry->d_inode->i_alloc_sem);
- fsfilt_check_slow(obd, now, "i_alloc_sem");
-
- /* Don't update inode timestamps if this write is older than a
- * setattr which modifies the timestamps. b=10150 */
- /* XXX when we start having persistent reservations this needs to
- * be changed to filter_fmd_get() to create the fmd if it doesn't
- * already exist so we can store the reservation handle there. */
- fmd = filter_fmd_find(exp, obj->ioo_id, obj->ioo_seq);
-
- LASSERT(oa != NULL);
-retry:
- cfs_spin_lock(&obd->obd_osfs_lock);
- if (retries == 0)
- filter_grant_incoming(exp, oa);
- if (fmd && fmd->fmd_mactime_xid > oti->oti_xid)
- oa->o_valid &= ~(OBD_MD_FLMTIME | OBD_MD_FLCTIME |
- OBD_MD_FLATIME);
- else
- obdo_to_inode(dentry->d_inode, oa, OBD_MD_FLATIME |
- OBD_MD_FLMTIME | OBD_MD_FLCTIME);
- cleanup_phase = 3;
-
- left = filter_grant_space_left(exp);
-
- fso.fso_dentry = dentry;
- fso.fso_bufcnt = *npages;
-
- rc = filter_grant_check(exp, oa, objcount, &fso, *npages, res,
- &left, dentry->d_inode);
-
- /* do not zero out oa->o_valid as it is used in filter_commitrw_write()
- * for setting UID/GID and fid EA in first write time. */
- /* If OBD_FL_SHRINK_GRANT is set, the client just returned us some grant
- * so no sense in allocating it some more. We either return the grant
- * back to the client if we have plenty of space or we don't return
- * anything if we are short. This was decided in filter_grant_incoming*/
- if ((retries == 0) && (oa->o_valid & OBD_MD_FLGRANT) &&
- (!(oa->o_valid & OBD_MD_FLFLAGS) ||
- !(oa->o_flags & OBD_FL_SHRINK_GRANT)))
- oa->o_grant = filter_grant(exp, oa->o_grant, oa->o_undirty,
- left, 1);
-
- cfs_spin_unlock(&obd->obd_osfs_lock);
-
- if (rc == -ENOSPC && retries == 0) {
- void *handle = NULL;
-
- CDEBUG(D_INODE, "retry after commit pending journals");
-
- retries = 1;
- handle = fsfilt_start(obd, dentry->d_inode,
- FSFILT_OP_SETATTR, NULL);
- if (handle != NULL &&
- fsfilt_commit(obd, dentry->d_inode, handle, 1) == 0)
- goto retry;
- }
-
- filter_fmd_put(exp, fmd);
-
- OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK2, (obd_timeout + 1) / 4);
-
- if (rc)
- GOTO(cleanup, rc);
- cleanup_phase = 4;
-
- cfs_gettimeofday(&start);
- for (i = 0, lnb = res; i < *npages; i++, lnb++) {
-
- /* We still set up for ungranted pages so that granted pages
- * can be written to disk as they were promised, and portals
- * needs to keep the pages all aligned properly. */
- lnb->dentry = dentry;
-
- lnb->page = filter_get_page(obd, dentry->d_inode,
- lnb->lnb_file_offset, localreq);
- if (lnb->page == NULL)
- GOTO(cleanup, rc = -ENOMEM);
-
- /* DLM locking protects us from write and truncate competing
- * for same region, but truncate can leave dirty page in the
- * cache. it's possible the writeout on a such a page is in
- * progress when we access it. it's also possible that during
- * this writeout we put new (partial) data, but then won't
- * be able to proceed in filter_commitrw_write(). thus let's
- * just wait for writeout completion, should be rare enough.
- * -bzzz */
- wait_on_page_writeback(lnb->page);
- BUG_ON(PageWriteback(lnb->page));
-
- /* If the filter writes a partial page, then has the file
- * extended, the client will read in the whole page. the
- * filter has to be careful to zero the rest of the partial
- * page on disk. we do it by hand for partial extending
- * writes, send_bio() is responsible for zeroing pages when
- * asked to read unmapped blocks -- brw_kiovec() does this. */
- if (lnb->len != CFS_PAGE_SIZE) {
- __s64 maxidx;
-
- maxidx = ((i_size_read(dentry->d_inode) +
- CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT) - 1;
- if (maxidx >= lnb->page->index) {
- LL_CDEBUG_PAGE(D_PAGE, lnb->page, "write %u @ "
- LPU64" flg %x before EOF %llu\n",
- lnb->len, lnb->lnb_file_offset,
- lnb->flags,
- i_size_read(dentry->d_inode));
- filter_iobuf_add_page(obd, iobuf,
- dentry->d_inode,
- lnb->page);
- } else {
- long off;
- char *p = kmap(lnb->page);
-
- off = lnb->lnb_file_offset & ~CFS_PAGE_MASK;
- if (off)
- memset(p, 0, off);
- off = (lnb->lnb_file_offset + lnb->len) &
- ~CFS_PAGE_MASK;
- if (off)
- memset(p + off, 0, CFS_PAGE_SIZE - off);
- kunmap(lnb->page);
- }
- }
- if (lnb->rc == 0)
- tot_bytes += lnb->len;
- }
- cfs_gettimeofday(&end);
- timediff = cfs_timeval_sub(&end, &start, NULL);
- lprocfs_counter_add(obd->obd_stats, LPROC_FILTER_GET_PAGE, timediff);
-
- if (OBD_FAIL_CHECK(OBD_FAIL_OST_NOMEM))
- GOTO(cleanup, rc = -ENOMEM);
-
- /* don't unlock pages to prevent any access */
- rc = filter_direct_io(OBD_BRW_READ, dentry, iobuf, exp,
- NULL, NULL, NULL);
-
- fsfilt_check_slow(obd, now, "start_page_write");
-
- lprocfs_counter_add(obd->obd_stats, LPROC_FILTER_WRITE_BYTES,
- tot_bytes);
-
- if (exp->exp_nid_stats && exp->exp_nid_stats->nid_stats)
- lprocfs_counter_add(exp->exp_nid_stats->nid_stats,
- LPROC_FILTER_WRITE_BYTES, tot_bytes);
- filter_counter_incr(exp, LPROC_FILTER_STATS_WRITE,
- oti ? oti->oti_jobid : NULL, tot_bytes);
- EXIT;
-cleanup:
- switch(cleanup_phase) {
- case 4:
- if (rc) {
- for (i = 0, lnb = res; i < *npages; i++, lnb++) {
- if (lnb->page != NULL) {
- unlock_page(lnb->page);
- page_cache_release(lnb->page);
- lnb->page = NULL;
- }
- }
- }
- case 3:
- if (rc)
- up_read(&dentry->d_inode->i_alloc_sem);
-
- filter_iobuf_put(&obd->u.filter, iobuf, oti);
- case 2:
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- if (rc)
- f_dput(dentry);
- break;
- case 1:
- filter_iobuf_put(&obd->u.filter, iobuf, oti);
- case 0:
- cfs_spin_lock(&obd->obd_osfs_lock);
- if (oa)
- filter_grant_incoming(exp, oa);
- cfs_spin_unlock(&obd->obd_osfs_lock);
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- break;
- default:;
- }
- return rc;
-}
-
-int filter_preprw(const struct lu_env *env, int cmd, struct obd_export *exp,
- struct obdo *oa, int objcount, struct obd_ioobj *obj,
- struct niobuf_remote *nb, int *npages,
- struct niobuf_local *res, struct obd_trans_info *oti,
- struct lustre_capa *capa)
-{
- if (cmd == OBD_BRW_WRITE)
- return filter_preprw_write(cmd, exp, oa, objcount, obj,
- nb, npages, res, oti, capa);
- if (cmd == OBD_BRW_READ)
- return filter_preprw_read(cmd, exp, oa, objcount, obj,
- nb, npages, res, oti, capa);
- LBUG();
- return -EPROTO;
-}
-
-static int filter_commitrw_read(struct obd_export *exp, struct obdo *oa,
- int objcount, struct obd_ioobj *obj,
- struct niobuf_remote *rnb,
- int npages, struct niobuf_local *res,
- struct obd_trans_info *oti, int rc)
-{
- struct filter_obd *fo = &exp->exp_obd->u.filter;
- struct inode *inode = NULL;
- struct ldlm_res_id res_id;
- struct ldlm_resource *resource = NULL;
- struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
- struct niobuf_local *lnb;
- int i;
- ENTRY;
-
- osc_build_res_name(obj->ioo_id, obj->ioo_seq, &res_id);
- /* If oa != NULL then filter_preprw_read updated the inode atime
- * and we should update the lvb so that other glimpses will also
- * get the updated value. bug 5972 */
- if (oa && ns && ns->ns_lvbo && ns->ns_lvbo->lvbo_update) {
- resource = ldlm_resource_get(ns, NULL, &res_id, LDLM_EXTENT, 0);
-
- if (resource != NULL) {
- LDLM_RESOURCE_ADDREF(resource);
- ns->ns_lvbo->lvbo_update(resource, NULL, 1);
- LDLM_RESOURCE_DELREF(resource);
- ldlm_resource_putref(resource);
- }
- }
-
- if (res->dentry != NULL)
- inode = res->dentry->d_inode;
-
- for (i = 0, lnb = res; i < npages; i++, lnb++) {
- if (lnb->page != NULL) {
- page_cache_release(lnb->page);
- lnb->page = NULL;
- }
- }
- if (inode && (fo->fo_read_cache == 0 ||
- i_size_read(inode) > fo->fo_readcache_max_filesize))
- filter_release_cache(exp->exp_obd, obj, rnb, inode);
-
- if (res->dentry != NULL)
- f_dput(res->dentry);
- RETURN(rc);
-}
-
-void filter_grant_commit(struct obd_export *exp, int niocount,
- struct niobuf_local *res)
-{
- struct filter_obd *filter = &exp->exp_obd->u.filter;
- struct niobuf_local *lnb = res;
- unsigned long pending = 0;
- int i;
-
- cfs_spin_lock(&exp->exp_obd->obd_osfs_lock);
- for (i = 0, lnb = res; i < niocount; i++, lnb++)
- pending += lnb->lnb_grant_used;
-
- LASSERTF(exp->exp_filter_data.fed_pending >= pending,
- "%s: cli %s/%p fed_pending: %lu grant_used: %lu\n",
- exp->exp_obd->obd_name, exp->exp_client_uuid.uuid, exp,
- exp->exp_filter_data.fed_pending, pending);
- exp->exp_filter_data.fed_pending -= pending;
- LASSERTF(filter->fo_tot_granted >= pending,
- "%s: cli %s/%p tot_granted: "LPU64" grant_used: %lu\n",
- exp->exp_obd->obd_name, exp->exp_client_uuid.uuid, exp,
- exp->exp_obd->u.filter.fo_tot_granted, pending);
- filter->fo_tot_granted -= pending;
- LASSERTF(filter->fo_tot_pending >= pending,
- "%s: cli %s/%p tot_pending: "LPU64" grant_used: %lu\n",
- exp->exp_obd->obd_name, exp->exp_client_uuid.uuid, exp,
- filter->fo_tot_pending, pending);
- filter->fo_tot_pending -= pending;
-
- cfs_spin_unlock(&exp->exp_obd->obd_osfs_lock);
-}
-
-int filter_commitrw(const struct lu_env *env, int cmd, struct obd_export *exp,
- struct obdo *oa, int objcount, struct obd_ioobj *obj,
- struct niobuf_remote *nb, int npages,
- struct niobuf_local *res, struct obd_trans_info *oti,
- int rc)
-{
- if (cmd == OBD_BRW_WRITE)
- return filter_commitrw_write(exp, oa, objcount, obj,
- nb, npages, res, oti, rc);
- if (cmd == OBD_BRW_READ)
- return filter_commitrw_read(exp, oa, objcount, obj,
- nb, npages, res, oti, rc);
- LBUG();
- return -EPROTO;
-}
git://git.whamcloud.com / fs / lustre-release.git / commitdiff