+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
- * Copyright (c) 2002 Cluster File Systems, Inc. <info@clusterfs.com>
- *
- * This file is part of Lustre, http://www.lustre.org.
- *
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- *
- * Lustre 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 for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#define DEBUG_SUBSYSTEM S_CMOBD
-
-#include <linux/version.h>
-#include <linux/init.h>
-#include <linux/obd_support.h>
-#include <linux/lustre_lib.h>
-#include <linux/lustre_net.h>
-#include <linux/lustre_idl.h>
-#include <linux/obd_class.h>
-#include <linux/lustre_log.h>
-#include <linux/lustre_cmobd.h>
-#include <linux/lustre_fsfilt.h>
-#include <linux/lustre_smfs.h>
-
-#include "cm_internal.h"
-
-void lov_free_memmd(struct lov_stripe_md **lsmp);
-
-int lov_alloc_memmd(struct lov_stripe_md **lsmp, int stripe_count,
- int pattern);
-
-int smfs_rec_unpack(struct smfs_proc_args *args, char *record,
- char **pbuf, int *opcode);
-
-/* helper functions for cmobd to construct pseudo lsm */
-int cmobd_dummy_lsm(struct lov_stripe_md **lsmp, int stripe_cnt,
- struct obdo *oa, __u32 stripe_size)
-{
- int i, rc;
- ENTRY;
-
- rc = lov_alloc_memmd(lsmp, stripe_cnt, LOV_PATTERN_CMOBD);
- if (rc < 0)
- RETURN(rc);
-
- for (i = 0; i < stripe_cnt; i++) {
- (*lsmp)->lsm_oinfo[i].loi_id = oa->o_id;
- (*lsmp)->lsm_object_id = oa->o_id;
- if (oa->o_valid & OBD_MD_FLGROUP) {
- (*lsmp)->lsm_oinfo[i].loi_gr = oa->o_gr;
- (*lsmp)->lsm_object_gr = oa->o_gr;
- }
- (*lsmp)->lsm_oinfo[i].loi_ost_idx = i;
- (*lsmp)->lsm_stripe_size = stripe_size;
- }
- RETURN(0);
-}
-
-void cmobd_free_lsm(struct lov_stripe_md **lsmp)
-{
- ENTRY;
- lov_free_memmd(lsmp);
- EXIT;
-}
-
-/* reintegration functions */
-static int cmobd_setattr_reint(struct obd_device *obd, void *rec)
-{
- struct cm_obd *cmobd = &obd->u.cm;
- struct lov_obd *lov = &cmobd->master_obd->u.lov;
- struct obd_export *exp = cmobd->master_exp;
- struct lov_stripe_md *lsm;
- struct obdo *oa = (struct obdo*)rec;
- int rc;
- ENTRY;
-
- rc = cmobd_dummy_lsm(&lsm, lov->desc.ld_tgt_count, oa,
- (__u32)lov->desc.ld_default_stripe_size);
- if (rc)
- GOTO(out, rc);
-
- rc = obd_setattr(exp, oa, lsm, NULL);
-
- cmobd_free_lsm(&lsm);
-out:
- RETURN(rc);
-}
-
-static int cmobd_create_reint(struct obd_device *obd, void *rec)
-{
- struct cm_obd *cmobd = &obd->u.cm;
- struct lov_obd *lov = &cmobd->master_obd->u.lov;
- struct obd_export *exp = cmobd->master_exp;
- struct lov_stripe_md *lsm;
- struct obd_trans_info oti = { 0 };
- struct obdo *oa=(struct obdo*)rec;
- int rc;
- ENTRY;
-
- rc = cmobd_dummy_lsm(&lsm, lov->desc.ld_tgt_count, oa,
- (__u32)lov->desc.ld_default_stripe_size);
- if (rc)
- GOTO(out, rc);
- if (cmobd->master_group != oa->o_gr) {
- int group = oa->o_gr;
- int valsize = sizeof(group);
- rc = obd_set_info(exp, strlen("mds_conn"), "mds_conn",
- valsize, &group);
- if (rc)
- GOTO(out, rc = -EINVAL);
- cmobd->master_group = oa->o_gr;
- }
- rc = obd_create(exp, oa, &lsm, &oti);
-
- cmobd_free_lsm(&lsm);
-out:
- RETURN(rc);
-}
-
-/* direct cut-n-paste of filter_blocking_ast() */
-static int cache_blocking_ast(struct ldlm_lock *lock,
- struct ldlm_lock_desc *desc,
- void *data, int flag)
-{
- int do_ast;
- ENTRY;
-
- if (flag == LDLM_CB_CANCELING) {
- /* Don't need to do anything here. */
- RETURN(0);
- }
-
- /* XXX layering violation! -phil */
- l_lock(&lock->l_resource->lr_namespace->ns_lock);
- /* Get this: if filter_blocking_ast is racing with ldlm_intent_policy,
- * such that filter_blocking_ast is called just before l_i_p takes the
- * ns_lock, then by the time we get the lock, we might not be the
- * correct blocking function anymore. So check, and return early, if
- * so. */
- if (lock->l_blocking_ast != cache_blocking_ast) {
- l_unlock(&lock->l_resource->lr_namespace->ns_lock);
- RETURN(0);
- }
-
- lock->l_flags |= LDLM_FL_CBPENDING;
- do_ast = (!lock->l_readers && !lock->l_writers);
- l_unlock(&lock->l_resource->lr_namespace->ns_lock);
-
- if (do_ast) {
- struct lustre_handle lockh;
- int rc;
-
- LDLM_DEBUG(lock, "already unused, calling ldlm_cli_cancel");
- ldlm_lock2handle(lock, &lockh);
- rc = ldlm_cli_cancel(&lockh);
- if (rc < 0)
- CERROR("ldlm_cli_cancel: %d\n", rc);
- } else {
- LDLM_DEBUG(lock, "Lock still has references, will be "
- "cancelled later");
- }
- RETURN(0);
-}
-
-static int master_blocking_ast(struct ldlm_lock *lock,
- struct ldlm_lock_desc *desc,
- void *data, int flag)
-{
- int rc;
- struct lustre_handle lockh;
- ENTRY;
-
- switch (flag) {
- case LDLM_CB_BLOCKING:
- ldlm_lock2handle(lock, &lockh);
- rc = ldlm_cli_cancel(&lockh);
- if (rc < 0) {
- CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
- RETURN(rc);
- }
- break;
- case LDLM_CB_CANCELING:
- /* do nothing here by now */
- break;
- default:
- LBUG();
- }
- RETURN(0);
-}
-
-static int cmobd_write_extents(struct obd_device *obd, struct obdo *oa,
- struct ldlm_extent *extent)
-{
- struct cm_obd *cmobd = &obd->u.cm;
- struct obd_device *cache = cmobd->cache_obd;
- struct lov_obd *lov = &cmobd->master_obd->u.lov;
- struct ldlm_res_id res_id;
- ldlm_policy_data_t policy;
- struct lustre_handle lockh_src = { 0 };
- struct lustre_handle lockh_dst = { 0 };
- struct lov_stripe_md *lsm;
- int flags = 0, err, rc = 0;
- ENTRY;
-
- /* XXX for debug write replay without smfs and kml */
- res_id.name[0]= oa->o_id;
- res_id.name[1]= oa->o_gr;
- policy.l_extent.start = extent->start;
- policy.l_extent.end = extent->end;
-
- /* get extent read lock on the source replay file */
- rc = ldlm_cli_enqueue(NULL, NULL, cache->obd_namespace, res_id,
- LDLM_EXTENT, &policy, LCK_PR,
- &flags, cache_blocking_ast, ldlm_completion_ast,
- NULL, NULL, NULL, 0, NULL, &lockh_src);
- if (rc != ELDLM_OK)
- RETURN(rc);
-
- /* construct the pseudo lsm */
- rc = cmobd_dummy_lsm(&lsm, lov->desc.ld_tgt_count, oa,
- (__u32)lov->desc.ld_default_stripe_size);
- if (rc)
- GOTO(out_lock, rc);
-
- rc = obd_enqueue(cmobd->master_exp, lsm, LDLM_EXTENT, &policy,
- LCK_PW, &flags, master_blocking_ast,
- ldlm_completion_ast, NULL,
- NULL, 0, NULL, &lockh_dst);
- if (rc != ELDLM_OK)
- GOTO(out_lsm, rc);
-
- err = cmobd_replay_write(obd, oa, &policy.l_extent);
-
- rc = obd_cancel(cmobd->master_exp, lsm, LCK_PW, &lockh_dst);
- if (rc)
- GOTO(out_lsm, rc);
- /* XXX in fact, I just want to cancel the only lockh_dst
- * instantly. */
- rc = obd_cancel_unused(cmobd->master_exp, lsm, 0, NULL);
- if (err)
- rc = err;
-out_lsm:
- cmobd_free_lsm(&lsm);
-out_lock:
- ldlm_lock_decref(&lockh_src, LCK_PR);
- RETURN(rc);
-}
-
-static int cmobd_write_reint(struct obd_device *obd, void *rec)
-{
- struct cm_obd *cmobd = &obd->u.cm;
- struct obd_device *cache = cmobd->cache_obd;
- struct obdo *oa = (struct obdo *)rec;
- struct ldlm_extent *extent = NULL;
- unsigned long csb, ino;
- char *extents_buf = NULL;
- int size = 0, rc = 0, ext_num = 0;
- ENTRY;
-
- size = sizeof(csb);
-
- obd_get_info(cmobd->cache_exp, strlen("cache_sb") + 1,
- "cache_sb", &size, &csb);
-
- ino = *(int*)(&oa->o_inline[0]);
- rc = fsfilt_get_ino_write_extents(cache, (struct super_block *)csb, ino,
- &extents_buf, &ext_num);
- if (rc)
- GOTO(out, rc);
- extent = (struct ldlm_extent *)extents_buf;
- size = ext_num;
- while (extent && size --) {
- rc = cmobd_write_extents(obd, oa, extent);
- if (rc)
- GOTO(out, rc);
- extent ++;
- }
-out:
- if (extents_buf)
- fsfilt_free_write_extents(cache, (struct super_block *)csb,
- ino, extents_buf, ext_num);
- RETURN(rc);
-}
-
-int cmobd_reint_oss(struct obd_device *obd, void *record, int opcode)
-{
- switch (opcode) {
- case OST_CREATE:
- return cmobd_create_reint(obd, record);
- case OST_SETATTR:
- return cmobd_setattr_reint(obd, record);
- case OST_WRITE:
- return cmobd_write_reint(obd, record);
- default:
- CERROR("unrecognized oss reint opcode %d\n",
- opcode);
- return -EINVAL;
- }
-}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff