*
* linux/fs/obdfilter/filter.c
*
- * Copyright (C) 2001, 2002 Cluster File Systems, Inc.
+ * Copyright (c) 2001-2003 Cluster File Systems, Inc.
+ * Author: Peter Braam <braam@clusterfs.com>
+ * Author: Andreas Dilger <adilger@clusterfs.com>
*
- * This code is issued under the GNU General Public License.
- * See the file COPYING in this distribution
+ * This file is part of Lustre, http://www.lustre.org.
*
- * by Peter Braam <braam@clusterfs.com>
- * and Andreas Dilger <adilger@clusterfs.com>
+ * 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.
+ */
+
+/*
+ * Invariant: Get O/R i_sem 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_sem to avoid single
+ * threaded operation on the OST.
*/
-#define EXPORT_SYMTAB
#define DEBUG_SUBSYSTEM S_FILTER
+#include <linux/config.h>
#include <linux/module.h>
-#include <linux/pagemap.h>
#include <linux/fs.h>
#include <linux/dcache.h>
+#include <linux/init.h>
+#include <linux/version.h>
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+# include <linux/mount.h>
+# include <linux/buffer_head.h>
+#endif
+
#include <linux/obd_class.h>
+#include <linux/obd_lov.h>
#include <linux/lustre_dlm.h>
-#include <linux/obd_filter.h>
-#include <linux/ext3_jbd.h>
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
-#include <linux/extN_jbd.h>
-#endif
-#include <linux/quotaops.h>
-#include <linux/init.h>
-#include <linux/random.h>
-#include <linux/stringify.h>
+#include <linux/lustre_fsfilt.h>
#include <linux/lprocfs_status.h>
+#include <linux/lustre_log.h>
+#include <linux/lustre_commit_confd.h>
+#include <portals/list.h>
-extern struct lprocfs_vars status_class_var[];
-extern struct lprocfs_vars status_var_nm_1[];
-
-static kmem_cache_t *filter_open_cache;
-static kmem_cache_t *filter_dentry_cache;
-
-#define FILTER_ROOTINO 2
-#define FILTER_ROOTINO_STR __stringify(FILTER_ROOTINO)
-
-#define S_SHIFT 12
-static char *obd_type_by_mode[S_IFMT >> S_SHIFT] = {
- [0] NULL,
- [S_IFREG >> S_SHIFT] "R",
- [S_IFDIR >> S_SHIFT] "D",
- [S_IFCHR >> S_SHIFT] "C",
- [S_IFBLK >> S_SHIFT] "B",
- [S_IFIFO >> S_SHIFT] "F",
- [S_IFSOCK >> S_SHIFT] "S",
- [S_IFLNK >> S_SHIFT] "L"
-};
+#include "filter_internal.h"
+
+static struct lvfs_callback_ops filter_lvfs_ops;
-static inline const char *obd_mode_to_type(int mode)
+static int filter_destroy(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *ea, struct obd_trans_info *);
+
+static void filter_commit_cb(struct obd_device *obd, __u64 transno,
+ void *cb_data, int error)
{
- return obd_type_by_mode[(mode & S_IFMT) >> S_SHIFT];
+ obd_transno_commit_cb(obd, transno, error);
}
-/* write the pathname into the string */
-static int filter_id(char *buf, obd_id id, obd_mode mode)
+
+/* Assumes caller has already pushed us into the kernel context. */
+int filter_finish_transno(struct obd_export *exp, struct obd_trans_info *oti,
+ int rc)
{
- return sprintf(buf, "O/%s/"LPU64, obd_mode_to_type(mode), id);
+ struct filter_obd *filter = &exp->exp_obd->u.filter;
+ struct filter_export_data *fed = &exp->exp_filter_data;
+ struct filter_client_data *fcd = fed->fed_fcd;
+ __u64 last_rcvd;
+ loff_t off;
+ int err, log_pri = D_HA;
+
+ /* Propagate error code. */
+ if (rc)
+ RETURN(rc);
+
+ if (!exp->exp_obd->obd_replayable || oti == NULL)
+ RETURN(rc);
+
+ /* we don't allocate new transnos for replayed requests */
+ if (oti->oti_transno == 0) {
+ spin_lock(&filter->fo_translock);
+ last_rcvd = le64_to_cpu(filter->fo_fsd->fsd_last_transno) + 1;
+ filter->fo_fsd->fsd_last_transno = cpu_to_le64(last_rcvd);
+ spin_unlock(&filter->fo_translock);
+ oti->oti_transno = last_rcvd;
+ } else {
+ spin_lock(&filter->fo_translock);
+ last_rcvd = oti->oti_transno;
+ if (last_rcvd > le64_to_cpu(filter->fo_fsd->fsd_last_transno))
+ filter->fo_fsd->fsd_last_transno =
+ cpu_to_le64(last_rcvd);
+ spin_unlock(&filter->fo_translock);
+ }
+ fcd->fcd_last_rcvd = cpu_to_le64(last_rcvd);
+
+ /* could get xid from oti, if it's ever needed */
+ fcd->fcd_last_xid = 0;
+
+ off = fed->fed_lr_off;
+ fsfilt_add_journal_cb(exp->exp_obd, last_rcvd, oti->oti_handle,
+ filter_commit_cb, NULL);
+ err = fsfilt_write_record(exp->exp_obd, filter->fo_rcvd_filp, fcd,
+ sizeof(*fcd), &off, 0);
+ 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, fcd->fcd_uuid, fed->fed_lr_idx, err);
+
+ RETURN(rc);
}
-static inline void f_dput(struct dentry *dentry)
+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",
dput(dentry);
}
-/* Not racy w.r.t. others, because we are the only user of this dentry */
-static void filter_drelease(struct dentry *dentry)
+/* 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 filter_obd *filter,
+ struct filter_export_data *fed, int cl_idx)
{
- if (dentry->d_fsdata)
- kmem_cache_free(filter_dentry_cache, dentry->d_fsdata);
-}
+ unsigned long *bitmap = filter->fo_last_rcvd_slots;
+ int new_client = (cl_idx == -1);
+ ENTRY;
-struct dentry_operations filter_dops = {
- .d_release = filter_drelease,
-};
+ LASSERT(bitmap != NULL);
-/* setup the object store with correct subdirectories */
-static int filter_prep(struct obd_device *obd)
+ /* XXX if fcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
+ if (!strcmp(fed->fed_fcd->fcd_uuid, obd->obd_uuid.uuid))
+ 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 = find_first_zero_bit(bitmap, FILTER_LR_MAX_CLIENTS);
+ repeat:
+ if (cl_idx >= FILTER_LR_MAX_CLIENTS) {
+ CERROR("no client slots - fix FILTER_LR_MAX_CLIENTS\n");
+ RETURN(-ENOMEM);
+ }
+ if (test_and_set_bit(cl_idx, bitmap)) {
+ CERROR("FILTER client %d: found bit is set in bitmap\n",
+ cl_idx);
+ cl_idx = find_next_zero_bit(bitmap,
+ FILTER_LR_MAX_CLIENTS,
+ cl_idx);
+ goto repeat;
+ }
+ } else {
+ if (test_and_set_bit(cl_idx, bitmap)) {
+ CERROR("FILTER client %d: bit already set in bitmap!\n",
+ cl_idx);
+ LBUG();
+ }
+ }
+
+ fed->fed_lr_idx = cl_idx;
+ fed->fed_lr_off = le32_to_cpu(filter->fo_fsd->fsd_client_start) +
+ cl_idx * le16_to_cpu(filter->fo_fsd->fsd_client_size);
+
+ CDEBUG(D_INFO, "client at index %d (%llu) with UUID '%s' added\n",
+ fed->fed_lr_idx, fed->fed_lr_off, fed->fed_fcd->fcd_uuid);
+
+ if (new_client) {
+ struct obd_run_ctxt saved;
+ loff_t off = fed->fed_lr_off;
+ int err;
+ void *handle;
+
+ CDEBUG(D_INFO, "writing client fcd at idx %u (%llu) (len %u)\n",
+ fed->fed_lr_idx,off,(unsigned int)sizeof(*fed->fed_fcd));
+
+ push_ctxt(&saved, &obd->obd_ctxt, NULL);
+ /* Transaction needed to fix bug 1403 */
+ handle = fsfilt_start(obd,
+ filter->fo_rcvd_filp->f_dentry->d_inode,
+ FSFILT_OP_SETATTR, NULL);
+ if (IS_ERR(handle)) {
+ err = PTR_ERR(handle);
+ CERROR("unable to start transaction: rc %d\n", err);
+ } else {
+ err = fsfilt_write_record(obd, filter->fo_rcvd_filp,
+ fed->fed_fcd,
+ sizeof(*fed->fed_fcd),
+ &off, 1);
+ fsfilt_commit(obd,
+ filter->fo_rcvd_filp->f_dentry->d_inode,
+ handle, 1);
+ }
+ pop_ctxt(&saved, &obd->obd_ctxt, NULL);
+
+ if (err) {
+ CERROR("error writing %s client idx %u: rc %d\n",
+ LAST_RCVD, fed->fed_lr_idx, err);
+ RETURN(err);
+ }
+ }
+ RETURN(0);
+}
+
+static int filter_client_free(struct obd_export *exp, int flags)
{
+ struct filter_export_data *fed = &exp->exp_filter_data;
+ struct filter_obd *filter = &exp->exp_obd->u.filter;
+ struct obd_device *obd = exp->exp_obd;
+ struct filter_client_data zero_fcd;
struct obd_run_ctxt saved;
+ int rc;
+ loff_t off;
+ ENTRY;
+
+ if (fed->fed_fcd == NULL)
+ RETURN(0);
+
+ if (flags & OBD_OPT_FAILOVER)
+ GOTO(free, 0);
+
+ /* XXX if fcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
+ if (strcmp(fed->fed_fcd->fcd_uuid, obd->obd_uuid.uuid ) == 0)
+ GOTO(free, 0);
+
+ LASSERT(filter->fo_last_rcvd_slots != NULL);
+
+ off = fed->fed_lr_off;
+
+ CDEBUG(D_INFO, "freeing client at idx %u (%lld) with UUID '%s'\n",
+ fed->fed_lr_idx, fed->fed_lr_off, fed->fed_fcd->fcd_uuid);
+
+ /* Clear the bit _after_ zeroing out the client so we don't
+ race with filter_client_add and zero out new clients.*/
+ if (!test_bit(fed->fed_lr_idx, filter->fo_last_rcvd_slots)) {
+ CERROR("FILTER client %u: bit already clear in bitmap!!\n",
+ fed->fed_lr_idx);
+ LBUG();
+ }
+
+ memset(&zero_fcd, 0, sizeof zero_fcd);
+ push_ctxt(&saved, &obd->obd_ctxt, NULL);
+ rc = fsfilt_write_record(obd, filter->fo_rcvd_filp, &zero_fcd,
+ sizeof(zero_fcd), &off, 1);
+ pop_ctxt(&saved, &obd->obd_ctxt, NULL);
+
+ CDEBUG(rc == 0 ? D_INFO : D_ERROR,
+ "zeroing disconnecting client %s at idx %u (%llu) in %s rc %d\n",
+ fed->fed_fcd->fcd_uuid, fed->fed_lr_idx, fed->fed_lr_off,
+ LAST_RCVD, rc);
+
+ if (!test_and_clear_bit(fed->fed_lr_idx, filter->fo_last_rcvd_slots)) {
+ CERROR("FILTER client %u: bit already clear in bitmap!!\n",
+ fed->fed_lr_idx);
+ LBUG();
+ }
+
+free:
+ OBD_FREE(fed->fed_fcd, sizeof(*fed->fed_fcd));
+
+ RETURN(0);
+}
+
+static int filter_free_server_data(struct filter_obd *filter)
+{
+ OBD_FREE(filter->fo_fsd, sizeof(*filter->fo_fsd));
+ filter->fo_fsd = NULL;
+ OBD_FREE(filter->fo_last_rcvd_slots,
+ FILTER_LR_MAX_CLIENT_WORDS * sizeof(unsigned long));
+ filter->fo_last_rcvd_slots = NULL;
+ return 0;
+}
+
+/* assumes caller is already in kernel ctxt */
+int filter_update_server_data(struct obd_device *obd, struct file *filp,
+ struct filter_server_data *fsd, int force_sync)
+{
+ loff_t off = 0;
+ int rc;
+ ENTRY;
+
+ CDEBUG(D_INODE, "server uuid : %s\n", fsd->fsd_uuid);
+ CDEBUG(D_INODE, "server last_rcvd : "LPU64"\n",
+ le64_to_cpu(fsd->fsd_last_transno));
+ CDEBUG(D_INODE, "server last_mount: "LPU64"\n",
+ le64_to_cpu(fsd->fsd_mount_count));
+
+ rc = fsfilt_write_record(obd, filp, fsd, sizeof(*fsd), &off,force_sync);
+ if (rc)
+ CERROR("error writing filter_server_data: rc = %d\n", rc);
+
+ RETURN(rc);
+}
+
+int filter_update_last_objid(struct obd_device *obd, obd_gr group,
+ int force_sync)
+{
struct filter_obd *filter = &obd->u.filter;
- struct dentry *dentry;
- struct dentry *root;
- struct file *file;
- struct inode *inode;
- int rc = 0;
- __u64 lastobjid = 2;
- int mode = 0;
-
- push_ctxt(&saved, &filter->fo_ctxt, NULL);
- dentry = simple_mkdir(current->fs->pwd, "O", 0700);
- CDEBUG(D_INODE, "got/created O: %p\n", dentry);
- if (IS_ERR(dentry)) {
- rc = PTR_ERR(dentry);
- CERROR("cannot open/create O: rc = %d\n", rc);
- GOTO(out, rc);
+ __u64 tmp;
+ loff_t off = 0;
+ int rc;
+ ENTRY;
+
+ CDEBUG(D_INODE, "server last_objid for group "LPU64": "LPU64"\n",
+ group, filter->fo_last_objids[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 group "LPU64" last objid: rc = %d\n",
+ group, rc);
+ RETURN(rc);
+}
+
+/* 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 filter_server_data *fsd;
+ struct filter_client_data *fcd = NULL;
+ struct inode *inode = filp->f_dentry->d_inode;
+ unsigned long last_rcvd_size = inode->i_size;
+ __u64 mount_count;
+ int cl_idx;
+ loff_t off = 0;
+ int rc;
+
+ /* ensure padding in the struct is the correct size */
+ LASSERT (offsetof(struct filter_server_data, fsd_padding) +
+ sizeof(fsd->fsd_padding) == FILTER_LR_SERVER_SIZE);
+ LASSERT (offsetof(struct filter_client_data, fcd_padding) +
+ sizeof(fcd->fcd_padding) == FILTER_LR_CLIENT_SIZE);
+
+ OBD_ALLOC(fsd, sizeof(*fsd));
+ if (!fsd)
+ RETURN(-ENOMEM);
+ filter->fo_fsd = fsd;
+
+ OBD_ALLOC(filter->fo_last_rcvd_slots,
+ FILTER_LR_MAX_CLIENT_WORDS * sizeof(unsigned long));
+ if (filter->fo_last_rcvd_slots == NULL) {
+ OBD_FREE(fsd, sizeof(*fsd));
+ RETURN(-ENOMEM);
}
- filter->fo_dentry_O = dentry;
- dentry = simple_mkdir(current->fs->pwd, "P", 0700);
- CDEBUG(D_INODE, "got/created P: %p\n", dentry);
- if (IS_ERR(dentry)) {
- rc = PTR_ERR(dentry);
- CERROR("cannot open/create P: rc = %d\n", rc);
- GOTO(out_O, rc);
+
+ if (last_rcvd_size == 0) {
+ CWARN("%s: initializing new %s\n", obd->obd_name, LAST_RCVD);
+
+ memcpy(fsd->fsd_uuid, obd->obd_uuid.uuid,sizeof(fsd->fsd_uuid));
+ fsd->fsd_last_transno = 0;
+ mount_count = fsd->fsd_mount_count = 0;
+ fsd->fsd_server_size = cpu_to_le32(FILTER_LR_SERVER_SIZE);
+ fsd->fsd_client_start = cpu_to_le32(FILTER_LR_CLIENT_START);
+ fsd->fsd_client_size = cpu_to_le16(FILTER_LR_CLIENT_SIZE);
+ fsd->fsd_subdir_count = cpu_to_le16(FILTER_SUBDIR_COUNT);
+ filter->fo_subdir_count = FILTER_SUBDIR_COUNT;
+ } else {
+ rc = fsfilt_read_record(obd, filp, fsd, sizeof(*fsd), &off);
+ if (rc) {
+ CDEBUG(D_INODE,"OBD filter: error reading %s: rc %d\n",
+ LAST_RCVD, rc);
+ GOTO(err_fsd, rc);
+ }
+ if (strcmp(fsd->fsd_uuid, obd->obd_uuid.uuid) != 0) {
+ CERROR("OBD UUID %s does not match last_rcvd UUID %s\n",
+ obd->obd_uuid.uuid, fsd->fsd_uuid);
+ GOTO(err_fsd, rc = -EINVAL);
+ }
+ mount_count = le64_to_cpu(fsd->fsd_mount_count);
+ filter->fo_subdir_count = le16_to_cpu(fsd->fsd_subdir_count);
}
- f_dput(dentry);
- dentry = simple_mkdir(current->fs->pwd, "D", 0700);
- CDEBUG(D_INODE, "got/created D: %p\n", dentry);
- if (IS_ERR(dentry)) {
- rc = PTR_ERR(dentry);
- CERROR("cannot open/create D: rc = %d\n", rc);
- GOTO(out_O, rc);
+
+ if (fsd->fsd_feature_incompat & ~cpu_to_le32(FILTER_INCOMPAT_SUPP)) {
+ CERROR("unsupported feature %x\n",
+ le32_to_cpu(fsd->fsd_feature_incompat) &
+ ~FILTER_INCOMPAT_SUPP);
+ GOTO(err_fsd, rc = -EINVAL);
+ }
+ if (fsd->fsd_feature_rocompat & ~cpu_to_le32(FILTER_ROCOMPAT_SUPP)) {
+ CERROR("read-only feature %x\n",
+ le32_to_cpu(fsd->fsd_feature_rocompat) &
+ ~FILTER_ROCOMPAT_SUPP);
+ /* Do something like remount filesystem read-only */
+ GOTO(err_fsd, rc = -EINVAL);
}
- root = simple_mknod(dentry, FILTER_ROOTINO_STR, S_IFREG | 0755);
- f_dput(dentry);
- if (IS_ERR(root)) {
- rc = PTR_ERR(root);
- CERROR("OBD filter: cannot open/create root %d: rc = %d\n",
- FILTER_ROOTINO, rc);
- GOTO(out_O, rc);
+ CDEBUG(D_INODE, "%s: server last_rcvd : "LPU64"\n",
+ obd->obd_name, le64_to_cpu(fsd->fsd_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(fsd->fsd_server_size));
+ CDEBUG(D_INODE, "%s: per-client data start: %u\n",
+ obd->obd_name, le32_to_cpu(fsd->fsd_client_start));
+ CDEBUG(D_INODE, "%s: per-client data size: %u\n",
+ obd->obd_name, le32_to_cpu(fsd->fsd_client_size));
+ CDEBUG(D_INODE, "%s: server subdir_count: %u\n",
+ obd->obd_name, le16_to_cpu(fsd->fsd_subdir_count));
+ CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name,
+ last_rcvd_size <= FILTER_LR_CLIENT_START ? 0 :
+ (last_rcvd_size-FILTER_LR_CLIENT_START) /FILTER_LR_CLIENT_SIZE);
+
+ if (!obd->obd_replayable) {
+ CWARN("%s: recovery support OFF\n", obd->obd_name);
+ GOTO(out, rc = 0);
}
- f_dput(root);
- /*
- * Create directories and/or get dentries for each object type.
- * This saves us from having to do multiple lookups for each one.
- */
- for (mode = 0; mode < (S_IFMT >> S_SHIFT); mode++) {
- char *type = obd_type_by_mode[mode];
+ for (cl_idx = 0, off = le32_to_cpu(fsd->fsd_client_start);
+ off < last_rcvd_size; cl_idx++) {
+ __u64 last_rcvd;
+ struct obd_export *exp;
+ struct filter_export_data *fed;
- if (!type) {
- filter->fo_dentry_O_mode[mode] = NULL;
+ if (!fcd) {
+ OBD_ALLOC(fcd, sizeof(*fcd));
+ if (!fcd)
+ GOTO(err_client, rc = -ENOMEM);
+ }
+
+ /* Don't assume off is incremented properly by
+ * fsfilt_read_record(), in case sizeof(*fcd)
+ * isn't the same as fsd->fsd_client_size. */
+ off = le32_to_cpu(fsd->fsd_client_start) +
+ cl_idx * le16_to_cpu(fsd->fsd_client_size);
+ rc = fsfilt_read_record(obd, filp, fcd, sizeof(*fcd), &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 (fcd->fcd_uuid[0] == '\0') {
+ CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
+ cl_idx);
continue;
}
- dentry = simple_mkdir(filter->fo_dentry_O, type, 0700);
- CDEBUG(D_INODE, "got/created O/%s: %p\n", type, dentry);
+
+ last_rcvd = le64_to_cpu(fcd->fcd_last_rcvd);
+
+ /* 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);
+ CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
+ " srv lr: "LPU64"\n", fcd->fcd_uuid, cl_idx,
+ last_rcvd, le64_to_cpu(fsd->fsd_last_transno));
+ if (exp == NULL)
+ GOTO(err_client, rc = -ENOMEM);
+
+ memcpy(&exp->exp_client_uuid.uuid, fcd->fcd_uuid,
+ sizeof exp->exp_client_uuid.uuid);
+ fed = &exp->exp_filter_data;
+ fed->fed_fcd = fcd;
+ filter_client_add(obd, filter, fed, cl_idx);
+ /* create helper if export init gets more complex */
+ spin_lock_init(&fed->fed_lock);
+
+ fcd = NULL;
+ obd->obd_recoverable_clients++;
+ class_export_put(exp);
+
+ CDEBUG(D_OTHER, "client at idx %d has last_rcvd = "LPU64"\n",
+ cl_idx, last_rcvd);
+
+ if (last_rcvd > le64_to_cpu(fsd->fsd_last_transno))
+ fsd->fsd_last_transno = cpu_to_le64(last_rcvd);
+
+ }
+
+ obd->obd_last_committed = le64_to_cpu(fsd->fsd_last_transno);
+
+ if (obd->obd_recoverable_clients) {
+ CWARN("RECOVERY: %d recoverable clients, last_rcvd "
+ LPU64"\n", obd->obd_recoverable_clients,
+ le64_to_cpu(fsd->fsd_last_transno));
+ obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
+ obd->obd_recovering = 1;
+ }
+
+ if (fcd)
+ OBD_FREE(fcd, sizeof(*fcd));
+
+out:
+ filter->fo_mount_count = mount_count + 1;
+ fsd->fsd_mount_count = cpu_to_le64(filter->fo_mount_count);
+
+ /* save it, so mount count and last_transno is current */
+ rc = filter_update_server_data(obd, filp, filter->fo_fsd, 1);
+
+ RETURN(rc);
+
+err_client:
+ class_disconnect_exports(obd, 0);
+err_fsd:
+ filter_free_server_data(filter);
+ RETURN(rc);
+}
+
+static int filter_cleanup_groups(struct obd_device *obd)
+{
+ struct filter_obd *filter = &obd->u.filter;
+ int i;
+ ENTRY;
+
+ if (filter->fo_dentry_O_groups != NULL &&
+ filter->fo_last_objids != NULL &&
+ filter->fo_last_objid_files != NULL) {
+ for (i = 0; i < FILTER_GROUPS; i++) {
+ struct dentry *dentry = filter->fo_dentry_O_groups[i];
+ struct file *filp = filter->fo_last_objid_files[i];
+ if (dentry != NULL) {
+ f_dput(dentry);
+ filter->fo_dentry_O_groups[i] = NULL;
+ }
+ if (filp != NULL) {
+ filp_close(filp, 0);
+ filter->fo_last_objid_files[i] = NULL;
+ }
+ }
+ }
+ if (filter->fo_dentry_O_sub != NULL && filter->fo_subdir_count) {
+ for (i = 0; i < filter->fo_subdir_count; i++) {
+ struct dentry *dentry = filter->fo_dentry_O_sub[i];
+ if (dentry != NULL) {
+ f_dput(dentry);
+ filter->fo_dentry_O_sub[i] = NULL;
+ }
+ }
+ OBD_FREE(filter->fo_dentry_O_sub,
+ filter->fo_subdir_count *
+ sizeof(*filter->fo_dentry_O_sub));
+ }
+ if (filter->fo_dentry_O_groups != NULL)
+ OBD_FREE(filter->fo_dentry_O_groups,
+ FILTER_GROUPS * sizeof(struct dentry *));
+ if (filter->fo_last_objids != NULL)
+ OBD_FREE(filter->fo_last_objids,
+ FILTER_GROUPS * sizeof(__u64));
+ if (filter->fo_last_objid_files != NULL)
+ OBD_FREE(filter->fo_last_objid_files,
+ FILTER_GROUPS * sizeof(struct file *));
+ RETURN(0);
+}
+
+/* FIXME: object groups */
+static int filter_prep_groups(struct obd_device *obd)
+{
+ struct filter_obd *filter = &obd->u.filter;
+ struct dentry *dentry, *O_dentry;
+ struct file *filp;
+ int i, rc = 0, cleanup_phase = 0;
+ ENTRY;
+
+ O_dentry = simple_mkdir(current->fs->pwd, "O", 0700, 1);
+ CDEBUG(D_INODE, "got/created O: %p\n", O_dentry);
+ if (IS_ERR(O_dentry)) {
+ rc = PTR_ERR(O_dentry);
+ CERROR("cannot open/create O: rc = %d\n", rc);
+ GOTO(cleanup, rc);
+ }
+ filter->fo_dentry_O = O_dentry;
+ cleanup_phase = 1; /* O_dentry */
+
+ /* Lookup "R" to tell if we're on an old OST FS and need to convert
+ * from O/R/<dir>/<objid> to O/0/<dir>/<objid>. This can be removed
+ * some time post 1.0 when all old-style OSTs have converted along
+ * with the init_objid hack. */
+ dentry = ll_lookup_one_len("R", O_dentry, 1);
+ if (IS_ERR(dentry))
+ GOTO(cleanup, rc = PTR_ERR(dentry));
+ if (dentry->d_inode && S_ISDIR(dentry->d_inode->i_mode)) {
+ struct dentry *O0_dentry = lookup_one_len("0", O_dentry, 1);
+ ENTRY;
+
+ CWARN("converting OST to new object layout\n");
+ if (IS_ERR(O0_dentry)) {
+ rc = PTR_ERR(O0_dentry);
+ CERROR("error looking up O/0: rc %d\n", rc);
+ GOTO(cleanup_R, rc);
+ }
+
+ if (O0_dentry->d_inode) {
+ CERROR("Both O/R and O/0 exist. Fix manually.\n");
+ GOTO(cleanup_O0, rc = -EEXIST);
+ }
+
+ down(&O_dentry->d_inode->i_sem);
+ rc = vfs_rename(O_dentry->d_inode, dentry,
+ O_dentry->d_inode, O0_dentry);
+ up(&O_dentry->d_inode->i_sem);
+
+ if (rc) {
+ CERROR("error renaming O/R to O/0: rc %d\n", rc);
+ GOTO(cleanup_O0, rc);
+ }
+ filter->fo_fsd->fsd_feature_incompat |=
+ cpu_to_le32(FILTER_INCOMPAT_GROUPS);
+ rc = filter_update_server_data(obd, filter->fo_rcvd_filp,
+ filter->fo_fsd, 1);
+ GOTO(cleanup_O0, rc);
+
+ cleanup_O0:
+ dput(O0_dentry);
+ cleanup_R:
+ dput(dentry);
+ if (rc)
+ GOTO(cleanup, rc);
+ } else {
+ dput(dentry);
+ }
+
+ OBD_ALLOC(filter->fo_last_objids, FILTER_GROUPS * sizeof(__u64));
+ if (filter->fo_last_objids == NULL)
+ GOTO(cleanup, rc = -ENOMEM);
+ cleanup_phase = 2; /* groups */
+
+ OBD_ALLOC(filter->fo_dentry_O_groups, FILTER_GROUPS * sizeof(dentry));
+ if (filter->fo_dentry_O_groups == NULL)
+ GOTO(cleanup, rc = -ENOMEM);
+ OBD_ALLOC(filter->fo_last_objid_files, FILTER_GROUPS * sizeof(filp));
+ if (filter->fo_last_objid_files == NULL)
+ GOTO(cleanup, rc = -ENOMEM);
+
+ for (i = 0; i < FILTER_GROUPS; i++) {
+ char name[25];
+ loff_t off = 0;
+
+ sprintf(name, "%d", i);
+ dentry = simple_mkdir(O_dentry, name, 0700, 1);
+ CDEBUG(D_INODE, "got/created O/%s: %p\n", name, dentry);
+ if (IS_ERR(dentry)) {
+ rc = PTR_ERR(dentry);
+ CERROR("cannot lookup/create O/%s: rc = %d\n",
+ name, rc);
+ GOTO(cleanup, rc);
+ }
+ filter->fo_dentry_O_groups[i] = dentry;
+
+ sprintf(name, "O/%d/LAST_ID", i);
+ filp = filp_open(name, O_CREAT | O_RDWR, 0700);
if (IS_ERR(dentry)) {
rc = PTR_ERR(dentry);
- CERROR("cannot create O/%s: rc = %d\n", type, rc);
- GOTO(out_O_mode, rc);
+ CERROR("cannot create %s: rc = %d\n", name, rc);
+ GOTO(cleanup, rc);
}
- filter->fo_dentry_O_mode[mode] = dentry;
+ filter->fo_last_objid_files[i] = filp;
+
+ if (filp->f_dentry->d_inode->i_size == 0) {
+ if (i == 0 && filter->fo_fsd->fsd_unused != 0) {
+ /* OST conversion, remove sometime post 1.0 */
+ filter->fo_last_objids[i] =
+ le64_to_cpu(filter->fo_fsd->fsd_unused);
+ CWARN("saving old objid "LPU64" to LAST_ID\n",
+ filter->fo_last_objids[i]);
+ rc = filter_update_last_objid(obd, 0, 1);
+ if (rc)
+ GOTO(cleanup, rc);
+ } else {
+ filter->fo_last_objids[i] = FILTER_INIT_OBJID;
+ }
+ continue;
+ }
+
+ rc = fsfilt_read_record(obd, filp, &filter->fo_last_objids[i],
+ sizeof(__u64), &off);
+ if (rc) {
+ CDEBUG(D_INODE,"OBD filter: error reading %s: rc %d\n",
+ name, rc);
+ GOTO(cleanup, rc);
+ }
+ filter->fo_last_objids[i] =
+ le64_to_cpu(filter->fo_last_objids[i]);
+ CDEBUG(D_INODE, "%s: server last_objid group %d: "LPU64"\n",
+ obd->obd_name, i, filter->fo_last_objids[i]);
+ }
+
+ if (filter->fo_subdir_count) {
+ O_dentry = filter->fo_dentry_O_groups[0];
+ OBD_ALLOC(filter->fo_dentry_O_sub,
+ filter->fo_subdir_count * sizeof(dentry));
+ if (filter->fo_dentry_O_sub == NULL)
+ GOTO(cleanup, rc = -ENOMEM);
+
+ for (i = 0; i < filter->fo_subdir_count; i++) {
+ char dir[20];
+ snprintf(dir, sizeof(dir), "d%u", i);
+
+ dentry = simple_mkdir(O_dentry, dir, 0700, 1);
+ CDEBUG(D_INODE, "got/created O/0/%s: %p\n", dir,dentry);
+ if (IS_ERR(dentry)) {
+ rc = PTR_ERR(dentry);
+ CERROR("can't lookup/create O/0/%s: rc = %d\n",
+ dir, rc);
+ GOTO(cleanup, rc);
+ }
+ filter->fo_dentry_O_sub[i] = dentry;
+ }
+ }
+ RETURN(0);
+
+ cleanup:
+ switch (cleanup_phase) {
+ case 2:
+ filter_cleanup_groups(obd);
+ case 1:
+ 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 obd_run_ctxt saved;
+ struct filter_obd *filter = &obd->u.filter;
+ struct file *file;
+ struct inode *inode;
+ int rc = 0;
+ ENTRY;
- file = filp_open("D/status", O_RDWR | O_CREAT, 0700);
- if ( !file || IS_ERR(file) ) {
+ push_ctxt(&saved, &obd->obd_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 status %s: rc = %d\n",
- "D/status", rc);
- GOTO(out_O_mode, rc);
+ CERROR("OBD filter: cannot open/create %s: rc = %d\n",
+ LAST_RCVD, rc);
+ GOTO(out, rc);
+ }
+
+ 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);
}
/* steal operations */
filter->fo_iop = inode->i_op;
filter->fo_aops = inode->i_mapping->a_ops;
- if (inode->i_size == 0) {
- __u64 disk_lastobjid = cpu_to_le64(lastobjid);
- ssize_t retval = file->f_op->write(file,(char *)&disk_lastobjid,
- sizeof(disk_lastobjid),
- &file->f_pos);
- if (retval != sizeof(disk_lastobjid)) {
- CDEBUG(D_INODE,"OBD filter: error writing lastobjid\n");
- filp_close(file, 0);
- GOTO(out_O_mode, rc = -EIO);
- }
- } else {
- __u64 disk_lastobjid;
- ssize_t retval = file->f_op->read(file, (char *)&disk_lastobjid,
- sizeof(disk_lastobjid),
- &file->f_pos);
- if (retval != sizeof(disk_lastobjid)) {
- CDEBUG(D_INODE,"OBD filter: error reading lastobjid\n");
- filp_close(file, 0);
- GOTO(out_O_mode, rc = -EIO);
- }
- lastobjid = le64_to_cpu(disk_lastobjid);
+ rc = filter_init_server_data(obd, file);
+ if (rc) {
+ CERROR("cannot read %s: rc = %d\n", LAST_RCVD, rc);
+ GOTO(err_filp, rc);
}
- filter->fo_lastobjid = lastobjid;
- filp_close(file, 0);
+ filter->fo_rcvd_filp = file;
+
+ rc = filter_prep_groups(obd);
+ if (rc)
+ GOTO(err_server_data, rc);
- rc = 0;
out:
- pop_ctxt(&saved);
+ pop_ctxt(&saved, &obd->obd_ctxt, NULL);
return(rc);
-out_O_mode:
- while (mode-- > 0) {
- struct dentry *dentry = filter->fo_dentry_O_mode[mode];
- if (dentry) {
- f_dput(dentry);
- filter->fo_dentry_O_mode[mode] = NULL;
- }
- }
-out_O:
- f_dput(filter->fo_dentry_O);
- filter->fo_dentry_O = NULL;
+ err_server_data:
+ //class_disconnect_exports(obd, 0);
+ filter_free_server_data(filter);
+ err_filp:
+ if (filp_close(file, 0))
+ CERROR("can't close %s after error\n", LAST_RCVD);
+ filter->fo_rcvd_filp = NULL;
goto out;
}
{
struct obd_run_ctxt saved;
struct filter_obd *filter = &obd->u.filter;
- __u64 disk_lastobjid;
- long rc;
- struct file *file;
- int mode;
+ int rc, i;
- push_ctxt(&saved, &filter->fo_ctxt, NULL);
- file = filp_open("D/status", O_RDWR | O_CREAT, 0700);
- if (IS_ERR(file)) {
- CERROR("OBD filter: cannot create status file\n");
- goto out;
- }
+ /* 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 */
- file->f_pos = 0;
- disk_lastobjid = cpu_to_le64(filter->fo_lastobjid);
- rc = file->f_op->write(file, (char *)&disk_lastobjid,
- sizeof(disk_lastobjid), &file->f_pos);
- if (rc != sizeof(disk_lastobjid))
- CERROR("OBD filter: error writing lastobjid: rc = %ld\n", rc);
-
- rc = filp_close(file, NULL);
+ push_ctxt(&saved, &obd->obd_ctxt, NULL);
+ rc = filter_update_server_data(obd, filter->fo_rcvd_filp,
+ filter->fo_fsd, 0);
if (rc)
- CERROR("OBD filter: cannot close status file: rc = %ld\n", rc);
+ CERROR("error writing server data: rc = %d\n", rc);
- for (mode = 0; mode < (S_IFMT >> S_SHIFT); mode++) {
- struct dentry *dentry = filter->fo_dentry_O_mode[mode];
- if (dentry) {
- f_dput(dentry);
- filter->fo_dentry_O_mode[mode] = NULL;
- }
+ for (i = 0; i < FILTER_GROUPS; i++) {
+ rc = filter_update_last_objid(obd, i, (i == FILTER_GROUPS - 1));
+ if (rc)
+ CERROR("error writing group %d lastobjid: rc = %d\n",
+ i, rc);
}
+
+ filp_close(filter->fo_rcvd_filp, 0);
+ filter->fo_rcvd_filp = NULL;
+ if (rc)
+ CERROR("error closing %s: rc = %d\n", LAST_RCVD, rc);
+
+ filter_cleanup_groups(obd);
f_dput(filter->fo_dentry_O);
-out:
- pop_ctxt(&saved);
+ filter_free_server_data(filter);
+ pop_ctxt(&saved, &obd->obd_ctxt, NULL);
}
+static void filter_set_last_id(struct filter_obd *filter, struct obdo *oa,
+ obd_id id)
+{
+ obd_gr group = 0;
+ LASSERT(filter->fo_fsd != NULL);
+
+ if (oa != NULL) {
+ LASSERT(oa->o_gr <= FILTER_GROUPS);
+ group = oa->o_gr;
+ }
+
+ spin_lock(&filter->fo_objidlock);
+ filter->fo_last_objids[group] = id;
+ spin_unlock(&filter->fo_objidlock);
+}
-static __u64 filter_next_id(struct obd_device *obd)
+__u64 filter_last_id(struct filter_obd *filter, struct obdo *oa)
{
obd_id id;
+ obd_gr group = 0;
+ LASSERT(filter->fo_fsd != NULL);
- spin_lock(&obd->u.filter.fo_objidlock);
- id = ++obd->u.filter.fo_lastobjid;
- spin_unlock(&obd->u.filter.fo_objidlock);
+ if (oa != NULL) {
+ LASSERT(oa->o_gr <= FILTER_GROUPS);
+ group = oa->o_gr;
+ }
+
+ /* FIXME: object groups */
+ spin_lock(&filter->fo_objidlock);
+ id = filter->fo_last_objids[group];
+ spin_unlock(&filter->fo_objidlock);
- /* FIXME: write the lastobjid to disk here */
return id;
}
-/* how to get files, dentries, inodes from object id's */
-/* parent i_sem is already held if needed for exclusivity */
-static struct dentry *filter_fid2dentry(struct obd_device *obd,
- struct dentry *dparent,
- __u64 id, __u32 type)
+/* direct cut-n-paste of mds_blocking_ast() */
+static int filter_blocking_ast(struct ldlm_lock *lock,
+ struct ldlm_lock_desc *desc,
+ void *data, int flag)
{
- struct super_block *sb = obd->u.filter.fo_sb;
- struct dentry *dchild;
- char name[32];
- int len;
+ int do_ast;
ENTRY;
- if (!sb || !sb->s_dev) {
- CERROR("fatal: device not initialized.\n");
- RETURN(ERR_PTR(-ENXIO));
+ if (flag == LDLM_CB_CANCELING) {
+ /* Don't need to do anything here. */
+ RETURN(0);
}
- if (id == 0) {
- CERROR("fatal: invalid object #0\n");
- LBUG();
- RETURN(ERR_PTR(-ESTALE));
+ /* 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 != filter_blocking_ast) {
+ l_unlock(&lock->l_resource->lr_namespace->ns_lock);
+ RETURN(0);
}
- if (!(type & S_IFMT)) {
- CERROR("OBD %s, object "LPU64" has bad type: %o\n",
- __FUNCTION__, id, type);
- RETURN(ERR_PTR(-EINVAL));
- }
+ lock->l_flags |= LDLM_FL_CBPENDING;
+ do_ast = (!lock->l_readers && !lock->l_writers);
+ l_unlock(&lock->l_resource->lr_namespace->ns_lock);
- len = sprintf(name, LPU64, id);
- CDEBUG(D_INODE, "opening object O/%s/%s\n", obd_mode_to_type(type),
- name);
- dchild = lookup_one_len(name, dparent, len);
- if (IS_ERR(dchild)) {
- CERROR("child lookup error %ld\n", PTR_ERR(dchild));
- RETURN(dchild);
- }
+ if (do_ast) {
+ struct lustre_handle lockh;
+ int rc;
- CDEBUG(D_INODE, "got child obj O/%s/%s: %p, count = %d\n",
- obd_mode_to_type(type), name, dchild,
- atomic_read(&dchild->d_count));
+ 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);
+}
- LASSERT(atomic_read(&dchild->d_count) > 0);
+static int filter_lock_dentry(struct obd_device *obd, struct dentry *dparent)
+{
+ down(&dparent->d_inode->i_sem);
+ return 0;
+}
- RETURN(dchild);
+/* We never dget the object parent, so DON'T dput it either */
+static void filter_parent_unlock(struct dentry *dparent)
+{
+ up(&dparent->d_inode->i_sem);
}
-static inline struct dentry *filter_parent(struct obd_device *obd,
- obd_mode mode)
+/* We never dget the object parent, so DON'T dput it either */
+struct dentry *filter_parent(struct obd_device *obd, obd_gr group, obd_id objid)
{
struct filter_obd *filter = &obd->u.filter;
+ LASSERT(group < FILTER_GROUPS); /* FIXME: object groups */
+
+ if (group > 0 || filter->fo_subdir_count == 0)
+ return filter->fo_dentry_O_groups[group];
- return filter->fo_dentry_O_mode[(mode & S_IFMT) >> S_SHIFT];
+ return filter->fo_dentry_O_sub[objid & (filter->fo_subdir_count - 1)];
}
-static struct file *filter_obj_open(struct obd_export *export,
- __u64 id, __u32 type)
+/* We never dget the object parent, so DON'T dput it either */
+struct dentry *filter_parent_lock(struct obd_device *obd, obd_gr group,
+ obd_id objid)
{
- struct filter_obd *filter = &export->exp_obd->u.filter;
- struct super_block *sb = filter->fo_sb;
- struct dentry *dentry;
- struct filter_export_data *fed = &export->exp_filter_data;
- struct filter_dentry_data *fdd;
- struct filter_file_data *ffd;
- struct obd_run_ctxt saved;
- char name[24];
- struct file *file;
- ENTRY;
+ unsigned long now = jiffies;
+ struct dentry *dparent = filter_parent(obd, group, objid);
+ int rc;
- if (!sb || !sb->s_dev) {
- CERROR("fatal: device not initialized.\n");
- RETURN(ERR_PTR(-ENXIO));
- }
+ if (IS_ERR(dparent))
+ return dparent;
- if (!id) {
- CERROR("fatal: invalid obdo "LPU64"\n", id);
- RETURN(ERR_PTR(-ESTALE));
- }
+ rc = filter_lock_dentry(obd, dparent);
+ if (time_after(jiffies, now + 15 * HZ))
+ CERROR("slow parent lock %lus\n", (jiffies - now) / HZ);
+ return rc ? ERR_PTR(rc) : dparent;
+}
- if (!(type & S_IFMT)) {
- CERROR("OBD %s, object "LPU64" has bad type: %o\n",
- __FUNCTION__, id, type);
- RETURN(ERR_PTR(-EINVAL));
- }
+/* 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_gr group, obd_id id)
+{
+ struct dentry *dparent = dir_dentry;
+ struct dentry *dchild;
+ char name[32];
+ int len;
+ ENTRY;
- ffd = kmem_cache_alloc(filter_open_cache, SLAB_KERNEL);
- if (!ffd) {
- CERROR("obdfilter: out of memory\n");
- RETURN(ERR_PTR(-ENOMEM));
+ if (id == 0) {
+ CERROR("fatal: invalid object id 0\n");
+ RETURN(ERR_PTR(-ESTALE));
}
- /* We preallocate this to avoid blocking while holding fo_fddlock */
- fdd = kmem_cache_alloc(filter_dentry_cache, SLAB_KERNEL);
- if (!fdd) {
- CERROR("obdfilter: out of memory\n");
- GOTO(out_ffd, file = ERR_PTR(-ENOMEM));
+ len = sprintf(name, LPU64, id);
+ if (dir_dentry == NULL) {
+ dparent = filter_parent_lock(obd, group, id);
+ if (IS_ERR(dparent))
+ RETURN(dparent);
}
-
- filter_id(name, id, type);
- push_ctxt(&saved, &filter->fo_ctxt, NULL);
- file = filp_open(name, O_RDONLY | O_LARGEFILE, 0 /* type? */);
- pop_ctxt(&saved);
-
- if (IS_ERR(file))
- GOTO(out_fdd, file);
-
- dentry = file->f_dentry;
- spin_lock(&filter->fo_fddlock);
- if (dentry->d_fsdata) {
- spin_unlock(&filter->fo_fddlock);
- kmem_cache_free(filter_dentry_cache, fdd);
- fdd = dentry->d_fsdata;
- LASSERT(kmem_cache_validate(filter_dentry_cache, fdd));
- /* should only happen during client recovery */
- if (fdd->fdd_flags & FILTER_FLAG_DESTROY)
- CDEBUG(D_INODE,"opening destroyed object "LPX64"\n",id);
- atomic_inc(&fdd->fdd_open_count);
- } else {
- atomic_set(&fdd->fdd_open_count, 1);
- fdd->fdd_flags = 0;
- /* If this is racy, then we can use {cmp}xchg and atomic_add */
- dentry->d_fsdata = fdd;
- spin_unlock(&filter->fo_fddlock);
+ CDEBUG(D_INODE, "looking up object O/%*s/%s\n",
+ dparent->d_name.len, dparent->d_name.name, name);
+ dchild = /*ll_*/lookup_one_len(name, dparent, len);
+ if (dir_dentry == NULL)
+ filter_parent_unlock(dparent);
+ if (IS_ERR(dchild)) {
+ CERROR("child lookup error %ld\n", PTR_ERR(dchild));
+ RETURN(dchild);
}
- get_random_bytes(&ffd->ffd_servercookie, sizeof(ffd->ffd_servercookie));
- ffd->ffd_file = file;
- file->private_data = ffd;
+ CDEBUG(D_INODE, "got child objid %s: %p, count = %d\n",
+ name, dchild, atomic_read(&dchild->d_count));
- if (!dentry->d_op)
- dentry->d_op = &filter_dops;
- else
- LASSERT(dentry->d_op == &filter_dops);
+ LASSERT(atomic_read(&dchild->d_count) > 0);
+
+ RETURN(dchild);
+}
- spin_lock(&fed->fed_lock);
- list_add(&ffd->ffd_export_list, &fed->fed_open_head);
- spin_unlock(&fed->fed_lock);
+static int filter_prepare_destroy(struct obd_device *obd, obd_id objid)
+{
+ struct lustre_handle lockh;
+ int flags = LDLM_AST_DISCARD_DATA, rc;
+ struct ldlm_res_id res_id = { .name = { objid } };
+ ldlm_policy_data_t policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
- CDEBUG(D_INODE, "opening objid "LPX64": rc = %p\n", id, file);
+ ENTRY;
+ /* Tell the clients that the object is gone now and that they should
+ * throw away any cached pages. */
+ rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, res_id,
+ LDLM_EXTENT, &policy, LCK_PW,
+ &flags, filter_blocking_ast, ldlm_completion_ast,
+ NULL, NULL, NULL, 0, NULL, &lockh);
-out:
- RETURN(file);
+ /* We only care about the side-effects, just drop the lock. */
+ if (rc == ELDLM_OK)
+ ldlm_lock_decref(&lockh, LCK_PW);
-out_fdd:
- kmem_cache_free(filter_dentry_cache, fdd);
-out_ffd:
- ffd->ffd_servercookie = DEAD_HANDLE_MAGIC;
- kmem_cache_free(filter_open_cache, ffd);
- goto out;
+ RETURN(rc);
}
-/* Caller must hold i_sem on dir_dentry->d_inode */
-static int filter_destroy_internal(struct obd_device *obd,
- struct dentry *dir_dentry,
- struct dentry *object_dentry)
+/* Caller must hold LCK_PW on parent and push us into kernel context.
+ * Caller is also required to ensure that dchild->d_inode exists. */
+static int filter_destroy_internal(struct obd_device *obd, obd_id objid,
+ struct dentry *dparent,
+ struct dentry *dchild)
{
- struct obd_run_ctxt saved;
- struct inode *inode = object_dentry->d_inode;
+ struct inode *inode = dchild->d_inode;
int rc;
ENTRY;
if (inode->i_nlink != 1 || atomic_read(&inode->i_count) != 1) {
- CERROR("destroying objid %*s nlink = %d, count = %d\n",
- object_dentry->d_name.len,
- object_dentry->d_name.name,
- inode->i_nlink, atomic_read(&inode->i_count));
+ CERROR("destroying objid %*s nlink = %lu, count = %d\n",
+ dchild->d_name.len, dchild->d_name.name,
+ (unsigned long)inode->i_nlink,
+ atomic_read(&inode->i_count));
}
- push_ctxt(&saved, &obd->u.filter.fo_ctxt, NULL);
- rc = vfs_unlink(dir_dentry->d_inode, object_dentry);
- /* XXX unlink from PENDING directory now too */
- pop_ctxt(&saved);
+ rc = vfs_unlink(dparent->d_inode, dchild);
if (rc)
CERROR("error unlinking objid %*s: rc %d\n",
- object_dentry->d_name.len,
- object_dentry->d_name.name, rc);
+ dchild->d_name.len, dchild->d_name.name, rc);
RETURN(rc);
}
-static int filter_close_internal(struct obd_device *obd,
- struct filter_file_data *ffd)
+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 file *filp = ffd->ffd_file;
- struct dentry *object_dentry = dget(filp->f_dentry);
- struct filter_dentry_data *fdd = object_dentry->d_fsdata;
- int rc, rc2 = 0;
+ struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
+ 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 list_head *tmp;
+ ldlm_error_t err;
+ int tmpflags = 0, rc, repsize[2] = {sizeof(struct ldlm_reply),
+ sizeof(struct ost_lvb) };
ENTRY;
- LASSERT(filp->private_data == ffd);
- LASSERT(fdd);
-
- rc = filp_close(filp, 0);
-
- if (atomic_dec_and_test(&fdd->fdd_open_count) &&
- fdd->fdd_flags & FILTER_FLAG_DESTROY) {
- struct dentry *dir_dentry = filter_parent(obd, S_IFREG);
+ policy = ldlm_get_processing_policy(res);
+ LASSERT(policy != NULL);
+ LASSERT(req != NULL);
- down(&dir_dentry->d_inode->i_sem);
- rc2 = filter_destroy_internal(obd, dir_dentry, object_dentry);
- if (rc2 && !rc)
- rc = rc2;
- up(&dir_dentry->d_inode->i_sem);
+ rc = lustre_pack_reply(req, 2, repsize, NULL);
+ if (rc)
+ RETURN(req->rq_status = rc);
+
+ reply_lvb = lustre_msg_buf(req->rq_repmsg, 1, sizeof(*reply_lvb));
+ LASSERT(reply_lvb != NULL);
+
+ //fixup_handle_for_resent_req(req, lock, &lockh);
+
+ /* If we grant any lock at all, it will be a whole-file read lock.
+ * Call the extent policy function to see if our request can be
+ * granted, or is blocked. */
+ lock->l_policy_data.l_extent.start = 0;
+ lock->l_policy_data.l_extent.end = OBD_OBJECT_EOF;
+ lock->l_req_mode = LCK_PR;
+
+ l_lock(&res->lr_namespace->ns_lock);
+
+ res->lr_tmp = &rpc_list;
+ rc = policy(lock, &tmpflags, 0, &err);
+ res->lr_tmp = NULL;
+
+ /* FIXME: we should change the policy function slightly, to not make
+ * this list at all, since we just turn around and free it */
+ while (!list_empty(&rpc_list)) {
+ struct ldlm_ast_work *w =
+ list_entry(rpc_list.next, struct ldlm_ast_work, w_list);
+ list_del(&w->w_list);
+ LDLM_LOCK_PUT(w->w_lock);
+ OBD_FREE(w, sizeof(*w));
}
- f_dput(object_dentry);
- kmem_cache_free(filter_open_cache, ffd);
-
- RETURN(rc);
-}
-
-/* obd methods */
-static int filter_connect(struct lustre_handle *conn, struct obd_device *obd,
- obd_uuid_t cluuid, struct recovd_obd *recovd,
- ptlrpc_recovery_cb_t recover)
-{
- struct obd_export *exp;
- int rc;
-
- ENTRY;
- MOD_INC_USE_COUNT;
- rc = class_connect(conn, obd, cluuid);
- if (rc)
- GOTO(out_dec, rc);
- exp = class_conn2export(conn);
- LASSERT(exp);
+ if (rc == LDLM_ITER_CONTINUE) {
+ /* The lock met with no resistance; we're finished. */
+ l_unlock(&res->lr_namespace->ns_lock);
+ RETURN(ELDLM_LOCK_REPLACED);
+ }
- INIT_LIST_HEAD(&exp->exp_filter_data.fed_open_head);
- spin_lock_init(&exp->exp_filter_data.fed_lock);
-out:
- RETURN(rc);
+ /* 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. */
+ down(&res->lr_lvb_sem);
+ res_lvb = res->lr_lvb_data;
+ LASSERT(res_lvb != NULL);
+ reply_lvb->lvb_size = res_lvb->lvb_size;
+ up(&res->lr_lvb_sem);
+
+ list_for_each(tmp, &res->lr_granted) {
+ struct ldlm_lock *tmplock =
+ list_entry(tmp, struct ldlm_lock, l_res_link);
+
+ if (tmplock->l_granted_mode == LCK_PR)
+ continue;
-out_dec:
- MOD_DEC_USE_COUNT;
- goto out;
-}
+ if (tmplock->l_policy_data.l_extent.end <=
+ reply_lvb->lvb_size)
+ continue;
-static int filter_disconnect(struct lustre_handle *conn)
-{
- struct obd_export *exp = class_conn2export(conn);
- struct filter_export_data *fed;
- int rc;
- ENTRY;
+ if (l == NULL) {
+ l = LDLM_LOCK_GET(tmplock);
+ continue;
+ }
- LASSERT(exp);
- fed = &exp->exp_filter_data;
- spin_lock(&fed->fed_lock);
- while (!list_empty(&fed->fed_open_head)) {
- struct filter_file_data *ffd;
+ if (l->l_policy_data.l_extent.start >
+ tmplock->l_policy_data.l_extent.start)
+ continue;
- ffd = list_entry(fed->fed_open_head.next, typeof(*ffd),
- ffd_export_list);
- list_del(&ffd->ffd_export_list);
- spin_unlock(&fed->fed_lock);
+ LDLM_LOCK_PUT(l);
+ l = LDLM_LOCK_GET(tmplock);
+ }
+ l_unlock(&res->lr_namespace->ns_lock);
- CERROR("force closing file %*s on disconnect\n",
- ffd->ffd_file->f_dentry->d_name.len,
- ffd->ffd_file->f_dentry->d_name.name);
+ /* There were no PW locks beyond the size in the LVB; finished. */
+ if (l == NULL)
+ RETURN(ELDLM_LOCK_ABORTED);
- filter_close_internal(exp->exp_obd, ffd);
- spin_lock(&fed->fed_lock);
+ LASSERT(l->l_glimpse_ast != NULL);
+ rc = l->l_glimpse_ast(l, NULL); /* this will update the LVB */
+ if (rc != 0 && res->lr_namespace->ns_lvbo &&
+ res->lr_namespace->ns_lvbo->lvbo_update) {
+ res->lr_namespace->ns_lvbo->lvbo_update(res, NULL, 0, 1);
}
- spin_unlock(&fed->fed_lock);
- ldlm_cancel_locks_for_export(exp);
- rc = class_disconnect(conn);
- if (!rc)
- MOD_DEC_USE_COUNT;
+ down(&res->lr_lvb_sem);
+ reply_lvb->lvb_size = res_lvb->lvb_size;
+ up(&res->lr_lvb_sem);
- /* XXX cleanup preallocated inodes */
- RETURN(rc);
+ LDLM_LOCK_PUT(l);
+
+ RETURN(ELDLM_LOCK_ABORTED);
}
/* mount the file system (secretly) */
-static int filter_setup(struct obd_device *obd, obd_count len, void *buf)
+int filter_common_setup(struct obd_device *obd, obd_count len, void *buf,
+ char *option)
{
- struct obd_ioctl_data* data = buf;
- struct filter_obd *filter;
+ struct lustre_cfg* lcfg = buf;
+ struct filter_obd *filter = &obd->u.filter;
struct vfsmount *mnt;
- int err = 0;
+ int rc = 0;
ENTRY;
- if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2)
+ dev_clear_rdonly(2);
+
+ if (!lcfg->lcfg_inlbuf1 || !lcfg->lcfg_inlbuf2)
RETURN(-EINVAL);
- MOD_INC_USE_COUNT;
- mnt = do_kern_mount(data->ioc_inlbuf2, 0, data->ioc_inlbuf1, NULL);
- err = PTR_ERR(mnt);
+ obd->obd_fsops = fsfilt_get_ops(lcfg->lcfg_inlbuf2);
+ if (IS_ERR(obd->obd_fsops))
+ RETURN(PTR_ERR(obd->obd_fsops));
+
+ mnt = do_kern_mount(lcfg->lcfg_inlbuf2, MS_NOATIME | MS_NODIRATIME,
+ lcfg->lcfg_inlbuf1, option);
+ rc = PTR_ERR(mnt);
if (IS_ERR(mnt))
- GOTO(err_dec, err);
+ GOTO(err_ops, rc);
+
+ if (lcfg->lcfg_inllen3 > 0 && lcfg->lcfg_inlbuf3) {
+ if (*lcfg->lcfg_inlbuf3 == 'f') {
+ obd->obd_replayable = 1;
+ obd_sync_filter = 1;
+ CWARN("%s: recovery enabled\n", obd->obd_name);
+ } else {
+ if (*lcfg->lcfg_inlbuf3 != 'n') {
+ CERROR("unrecognised flag '%c'\n",
+ *lcfg->lcfg_inlbuf3);
+ }
+ // XXX Robert? Why do we get errors here
+ // GOTO(err_mntput, rc = -EINVAL);
+ }
+ }
- filter = &obd->u.filter;;
filter->fo_vfsmnt = mnt;
- filter->fo_fstype = strdup(data->ioc_inlbuf2);
- filter->fo_sb = mnt->mnt_root->d_inode->i_sb;
- CERROR("%s: mnt is %p\n", data->ioc_inlbuf1, filter->fo_vfsmnt);
- /* XXX is this even possible if do_kern_mount succeeded? */
- if (!filter->fo_sb)
- GOTO(err_kfree, err = -ENODEV);
-
- OBD_SET_CTXT_MAGIC(&filter->fo_ctxt);
- filter->fo_ctxt.pwdmnt = mnt;
- filter->fo_ctxt.pwd = mnt->mnt_root;
- filter->fo_ctxt.fs = get_ds();
-
- err = filter_prep(obd);
- if (err)
- GOTO(err_kfree, err);
- spin_lock_init(&filter->fo_fddlock);
+ filter->fo_sb = mnt->mnt_sb;
+ filter->fo_fstype = mnt->mnt_sb->s_type->name;
+ CDEBUG(D_SUPER, "%s: mnt = %p\n", filter->fo_fstype, mnt);
+
+ OBD_SET_CTXT_MAGIC(&obd->obd_ctxt);
+ obd->obd_ctxt.pwdmnt = mnt;
+ obd->obd_ctxt.pwd = mnt->mnt_root;
+ obd->obd_ctxt.fs = get_ds();
+ obd->obd_ctxt.cb_ops = filter_lvfs_ops;
+
+ rc = filter_prep(obd);
+ if (rc)
+ GOTO(err_mntput, rc);
+
+ spin_lock_init(&filter->fo_translock);
spin_lock_init(&filter->fo_objidlock);
INIT_LIST_HEAD(&filter->fo_export_list);
-
- obd->obd_namespace =
- ldlm_namespace_new("filter-tgt", LDLM_NAMESPACE_SERVER);
+ sema_init(&filter->fo_alloc_lock, 1);
+ spin_lock_init(&filter->fo_r_pages.oh_lock);
+ spin_lock_init(&filter->fo_w_pages.oh_lock);
+ spin_lock_init(&filter->fo_r_discont_pages.oh_lock);
+ spin_lock_init(&filter->fo_w_discont_pages.oh_lock);
+ spin_lock_init(&filter->fo_r_discont_blocks.oh_lock);
+ spin_lock_init(&filter->fo_w_discont_blocks.oh_lock);
+ filter->fo_readcache_max_filesize = FILTER_MAX_CACHE_SIZE;
+
+ obd->obd_namespace = ldlm_namespace_new("filter-tgt",
+ LDLM_NAMESPACE_SERVER);
if (obd->obd_namespace == NULL)
- LBUG();
+ 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 = llog_cat_initialize(obd, 1);
+ if (rc) {
+ CERROR("failed to setup llogging subsystems\n");
+ GOTO(err_post, rc);
+ }
+
RETURN(0);
-err_kfree:
- kfree(filter->fo_fstype);
+err_post:
+ filter_post(obd);
+err_mntput:
unlock_kernel();
- mntput(filter->fo_vfsmnt);
+ mntput(mnt);
filter->fo_sb = 0;
lock_kernel();
-
-err_dec:
- MOD_DEC_USE_COUNT;
- return err;
+err_ops:
+ fsfilt_put_ops(obd->obd_fsops);
+ return rc;
}
+static int filter_setup(struct obd_device *obd, obd_count len, void *buf)
+{
+ struct lustre_cfg* lcfg = buf;
+ const char *str = NULL;
+ char *option = NULL;
+ int n = 0;
+ int rc;
+
+ if (!strcmp(lcfg->lcfg_inlbuf2, "ext3")) {
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ /* bug 1577: implement async-delete for 2.5 */
+ str = "errors=remount-ro,asyncdel";
+#else
+ str = "errors=remount-ro";
+#endif
+ n = strlen(str) + 1;
+ OBD_ALLOC(option, n);
+ if (option == NULL)
+ RETURN(-ENOMEM);
+ strcpy(option, str);
+ }
+
+ rc = filter_common_setup(obd, len, buf, option);
+ if (option)
+ OBD_FREE(option, n);
+ return rc;
+}
-static int filter_cleanup(struct obd_device *obd)
+static int filter_cleanup(struct obd_device *obd, int flags)
{
- struct super_block *sb;
+ struct filter_obd *filter = &obd->u.filter;
ENTRY;
+ if (flags & OBD_OPT_FAILOVER)
+ CERROR("%s: shutting down for failover; client state will"
+ " be preserved.\n", obd->obd_name);
+
if (!list_empty(&obd->obd_exports)) {
- CERROR("still has clients!\n");
- class_disconnect_all(obd);
+ CERROR("%s: still has clients!\n", obd->obd_name);
+ class_disconnect_exports(obd, flags);
if (!list_empty(&obd->obd_exports)) {
CERROR("still has exports after forced cleanup?\n");
RETURN(-EBUSY);
}
}
- ldlm_namespace_free(obd->obd_namespace);
+ ldlm_namespace_free(obd->obd_namespace, flags & OBD_OPT_FORCE);
- sb = obd->u.filter.fo_sb;
- if (!obd->u.filter.fo_sb)
+ if (filter->fo_sb == NULL)
RETURN(0);
filter_post(obd);
- shrink_dcache_parent(sb->s_root);
- unlock_kernel();
- mntput(obd->u.filter.fo_vfsmnt);
- obd->u.filter.fo_sb = 0;
- kfree(obd->u.filter.fo_fstype);
+ shrink_dcache_parent(filter->fo_sb->s_root);
+ filter->fo_sb = 0;
+ if (atomic_read(&filter->fo_vfsmnt->mnt_count) > 1)
+ CERROR("%s: mount point %p busy, mnt_count: %d\n",
+ obd->obd_name, filter->fo_vfsmnt,
+ atomic_read(&filter->fo_vfsmnt->mnt_count));
+
+ unlock_kernel();
+ mntput(filter->fo_vfsmnt);
+ //destroy_buffers(filter->fo_sb->s_dev);
+ filter->fo_sb = NULL;
+ fsfilt_put_ops(obd->obd_fsops);
lock_kernel();
- MOD_DEC_USE_COUNT;
+ dev_clear_rdonly(2);
+
RETURN(0);
}
-
-static void filter_from_inode(struct obdo *oa, struct inode *inode, int valid)
+static int filter_attach(struct obd_device *obd, obd_count len, void *data)
{
- int type = oa->o_mode & S_IFMT;
- ENTRY;
+ struct lprocfs_static_vars lvars;
+ int rc;
- CDEBUG(D_INFO, "src inode %ld (%p), dst obdo %ld valid 0x%08x\n",
- inode->i_ino, inode, (long)oa->o_id, valid);
- /* Don't copy the inode number in place of the object ID */
- obdo_from_inode(oa, inode, valid);
- oa->o_mode &= ~S_IFMT;
- oa->o_mode |= type;
+ lprocfs_init_vars(filter, &lvars);
+ rc = lprocfs_obd_attach(obd, lvars.obd_vars);
+ if (rc != 0)
+ return rc;
- if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
- obd_rdev rdev = kdev_t_to_nr(inode->i_rdev);
- oa->o_rdev = rdev;
- oa->o_valid |= OBD_MD_FLRDEV;
- }
+ rc = lprocfs_alloc_obd_stats(obd, LPROC_FILTER_LAST);
+ if (rc != 0)
+ return rc;
- EXIT;
+ /* 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");
+
+ return lproc_filter_attach_seqstat(obd);
}
-static struct filter_file_data *filter_handle2ffd(struct lustre_handle *handle)
+static int filter_detach(struct obd_device *dev)
{
- struct filter_file_data *ffd = NULL;
- ENTRY;
+ lprocfs_free_obd_stats(dev);
+ return lprocfs_obd_detach(dev);
+}
- if (!handle || !handle->addr)
- RETURN(NULL);
+/* nearly identical to mds_connect */
+static int filter_connect(struct lustre_handle *conn, struct obd_device *obd,
+ struct obd_uuid *cluuid)
+{
+ struct obd_export *exp;
+ struct filter_export_data *fed;
+ struct filter_client_data *fcd = NULL;
+ struct filter_obd *filter = &obd->u.filter;
+ int rc;
+ ENTRY;
- ffd = (struct filter_file_data *)(unsigned long)(handle->addr);
- if (!kmem_cache_validate(filter_open_cache, (void *)ffd))
- RETURN(NULL);
+ if (conn == NULL || obd == NULL || cluuid == NULL)
+ RETURN(-EINVAL);
- if (ffd->ffd_servercookie != handle->cookie)
- RETURN(NULL);
+ rc = class_connect(conn, obd, cluuid);
+ if (rc)
+ RETURN(rc);
+ exp = class_conn2export(conn);
+ LASSERT(exp != NULL);
- LASSERT(ffd->ffd_file->private_data == ffd);
- RETURN(ffd);
-}
+ fed = &exp->exp_filter_data;
-static struct dentry *__filter_oa2dentry(struct lustre_handle *conn,
- struct obdo *oa, char *what)
-{
- struct dentry *dentry = NULL;
+ spin_lock_init(&fed->fed_lock);
- if (oa->o_valid & OBD_MD_FLHANDLE) {
- struct lustre_handle *ost_handle = obdo_handle(oa);
- struct filter_file_data *ffd = filter_handle2ffd(ost_handle);
+ if (!obd->obd_replayable)
+ GOTO(cleanup, rc = 0);
- if (ffd)
- dentry = dget(ffd->ffd_file->f_dentry);
+ OBD_ALLOC(fcd, sizeof(*fcd));
+ if (!fcd) {
+ CERROR("filter: out of memory for client data\n");
+ GOTO(cleanup, rc = -ENOMEM);
}
- if (!dentry) {
- struct obd_device *obd = class_conn2obd(conn);
- if (!obd) {
- CERROR("invalid client "LPX64"\n", conn->addr);
- RETURN(ERR_PTR(-EINVAL));
- }
- dentry = filter_fid2dentry(obd, filter_parent(obd, oa->o_mode),
- oa->o_id, oa->o_mode);
- }
+ memcpy(fcd->fcd_uuid, cluuid, sizeof(fcd->fcd_uuid));
+ fed->fed_fcd = fcd;
- if (!dentry->d_inode) {
- CERROR("%s on non-existent object: "LPU64"\n", what, oa->o_id);
- f_dput(dentry);
- dentry = ERR_PTR(-ENOENT);
- }
+ rc = filter_client_add(obd, filter, fed, -1);
- return dentry;
+cleanup:
+ if (rc) {
+ if (fcd)
+ OBD_FREE(fcd, sizeof(*fcd));
+ class_disconnect(exp, 0);
+ } else {
+ class_export_put(exp);
+ }
+ return rc;
}
-#define filter_oa2dentry(conn, oa) __filter_oa2dentry(conn, oa, __FUNCTION__)
-
-static int filter_getattr(struct lustre_handle *conn, struct obdo *oa,
- struct lov_stripe_md *md)
+static int filter_precleanup(struct obd_device *obd, int flags)
{
- struct dentry *dentry = NULL;
int rc = 0;
ENTRY;
- dentry = filter_oa2dentry(conn, oa);
- if (IS_ERR(dentry))
- RETURN(PTR_ERR(dentry));
-
- filter_from_inode(oa, dentry->d_inode, oa->o_valid);
+ rc = obd_llog_finish(obd, 0);
+ if (rc)
+ CERROR("failed to cleanup llogging subsystem\n");
- f_dput(dentry);
RETURN(rc);
}
-static int filter_setattr(struct lustre_handle *conn, struct obdo *oa,
- struct lov_stripe_md *md)
+/* 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, char *func)
{
- struct obd_run_ctxt saved;
- struct obd_device *obd = class_conn2obd(conn);
- struct dentry *dentry;
- struct iattr iattr;
- struct inode *inode;
- int rc;
- ENTRY;
-
- dentry = filter_oa2dentry(conn, oa);
-
- if (IS_ERR(dentry))
- RETURN(PTR_ERR(dentry));
-
- iattr_from_obdo(&iattr, oa, oa->o_valid);
- iattr.ia_mode = (iattr.ia_mode & ~S_IFMT) | S_IFREG;
- inode = dentry->d_inode;
-
- lock_kernel();
- if (iattr.ia_valid & ATTR_SIZE)
- down(&inode->i_sem);
- push_ctxt(&saved, &obd->u.filter.fo_ctxt, NULL);
- if (inode->i_op->setattr)
- rc = inode->i_op->setattr(dentry, &iattr);
- else
- rc = inode_setattr(inode, &iattr);
- pop_ctxt(&saved);
- if (iattr.ia_valid & ATTR_SIZE) {
- up(&inode->i_sem);
- oa->o_valid = OBD_MD_FLBLOCKS | OBD_MD_FLCTIME | OBD_MD_FLMTIME;
- obdo_from_inode(oa, inode, oa->o_valid);
+ 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 (list_empty(&obd->obd_exports))
+ return;
+
+ spin_lock(&obd->obd_osfs_lock);
+ spin_lock(&obd->obd_dev_lock);
+ list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain) {
+ fed = &exp->exp_filter_data;
+ LASSERTF(fed->fed_grant + fed->fed_pending <= maxsize,
+ "cli %s/%p %lu+%lu > "LPU64"\n",
+ exp->exp_client_uuid.uuid, exp,
+ fed->fed_grant, fed->fed_pending, maxsize);
+ LASSERTF(fed->fed_dirty <= maxsize, "cli %s/%p %lu > "LPU64"\n",
+ exp->exp_client_uuid.uuid, exp,fed->fed_dirty,maxsize);
+ CDEBUG(D_CACHE,"%s: cli %s/%p dirty %lu pend %lu grant %lu\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;
}
- unlock_kernel();
+ 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;
+ spin_unlock(&obd->obd_dev_lock);
+ 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);
+}
- f_dput(dentry);
- RETURN(rc);
+/* 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;
+
+ spin_lock(&obd->obd_osfs_lock);
+ spin_lock(&exp->exp_obd->obd_dev_lock);
+ list_del_init(&exp->exp_obd_chain);
+ spin_unlock(&exp->exp_obd->obd_dev_lock);
+
+ CDEBUG(D_CACHE, "%s: cli %s/%p dirty %lu pend %lu grant %lu\n",
+ obd->obd_name, exp->exp_client_uuid.uuid, exp,
+ fed->fed_dirty, fed->fed_pending, fed->fed_grant);
+
+ LASSERTF(filter->fo_tot_granted >= fed->fed_grant,
+ "%s: tot_granted "LPU64" cli %s/%p fed_grant %lu\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(exp->exp_obd->u.filter.fo_tot_pending >= fed->fed_pending,
+ "%s: tot_pending "LPU64" cli %s/%p fed_pending %lu\n",
+ obd->obd_name, filter->fo_tot_pending,
+ exp->exp_client_uuid.uuid, exp, fed->fed_pending);
+ LASSERTF(filter->fo_tot_dirty >= fed->fed_dirty,
+ "%s: tot_dirty "LPU64" cli %s/%p fed_dirty %lu\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;
+
+ spin_unlock(&obd->obd_osfs_lock);
}
-static int filter_open(struct lustre_handle *conn, struct obdo *oa,
- struct lov_stripe_md *ea)
+static int filter_destroy_export(struct obd_export *exp)
{
- struct obd_export *export;
- struct lustre_handle *handle;
- struct filter_file_data *ffd;
- struct file *filp;
- int rc = 0;
ENTRY;
- export = class_conn2export(conn);
- if (!export) {
- CDEBUG(D_IOCTL, "fatal: invalid client "LPX64"\n", conn->addr);
- RETURN(-EINVAL);
- }
+ if (exp->exp_filter_data.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, exp->exp_filter_data.fed_pending);
- filp = filter_obj_open(export, oa->o_id, oa->o_mode);
- if (IS_ERR(filp))
- GOTO(out, rc = PTR_ERR(filp));
+ target_destroy_export(exp);
- filter_from_inode(oa, filp->f_dentry->d_inode, oa->o_valid);
+ if (exp->exp_obd->obd_replayable)
+ filter_client_free(exp, exp->exp_flags);
- ffd = filp->private_data;
- handle = obdo_handle(oa);
- handle->addr = (__u64)(unsigned long)ffd;
- handle->cookie = ffd->ffd_servercookie;
- oa->o_valid |= OBD_MD_FLHANDLE;
-out:
- RETURN(rc);
-} /* filter_open */
+ filter_grant_discard(exp);
+ if (!(exp->exp_flags & OBD_OPT_FORCE))
+ filter_grant_sanity_check(exp->exp_obd, __FUNCTION__);
-static int filter_close(struct lustre_handle *conn, struct obdo *oa,
- struct lov_stripe_md *ea)
+ RETURN(0);
+}
+
+/* also incredibly similar to mds_disconnect */
+static int filter_disconnect(struct obd_export *exp, int flags)
{
- struct obd_export *exp;
- struct filter_file_data *ffd;
- struct filter_export_data *fed;
+ struct obd_device *obd = exp->exp_obd;
+ unsigned long irqflags;
+ struct llog_ctxt *ctxt;
int rc;
ENTRY;
- exp = class_conn2export(conn);
- if (!exp) {
- CDEBUG(D_IOCTL, "fatal: invalid client "LPX64"\n", conn->addr);
- RETURN(-EINVAL);
- }
-
- if (!(oa->o_valid & OBD_MD_FLHANDLE)) {
- CERROR("no handle for close of objid "LPX64"\n", oa->o_id);
- RETURN(-EINVAL);
- }
-
- ffd = filter_handle2ffd(obdo_handle(oa));
- if (!ffd) {
- struct lustre_handle *handle = obdo_handle(oa);
- CERROR("bad handle ("LPX64") or cookie ("LPX64") for close\n",
- handle->addr, handle->cookie);
- RETURN(-ESTALE);
- }
-
- fed = &exp->exp_filter_data;
- spin_lock(&fed->fed_lock);
- list_del(&ffd->ffd_export_list);
- spin_unlock(&fed->fed_lock);
-
- rc = filter_close_internal(exp->exp_obd, ffd);
-
- RETURN(rc);
-} /* filter_close */
+ LASSERT(exp);
+ class_export_get(exp);
-static int filter_create(struct lustre_handle *conn, struct obdo *oa,
- struct lov_stripe_md **ea)
-{
- struct obd_device *obd = class_conn2obd(conn);
- char name[64];
- struct obd_run_ctxt saved;
- struct dentry *new;
- struct iattr;
- ENTRY;
+ spin_lock_irqsave(&exp->exp_lock, irqflags);
+ exp->exp_flags = flags;
+ spin_unlock_irqrestore(&exp->exp_lock, irqflags);
- if (!obd) {
- CERROR("invalid client "LPX64"\n", conn->addr);
- return -EINVAL;
- }
+ if (!(flags & OBD_OPT_FORCE))
+ filter_grant_sanity_check(obd, __FUNCTION__);
+ filter_grant_discard(exp);
- if (!(oa->o_mode & S_IFMT)) {
- CERROR("OBD %s, object "LPU64" has bad type: %o\n",
- __FUNCTION__, oa->o_id, oa->o_mode);
- return -ENOENT;
- }
+ /* Disconnect early so that clients can't keep using export */
+ rc = class_disconnect(exp, flags);
- oa->o_id = filter_next_id(obd);
+ ldlm_cancel_locks_for_export(exp);
- //filter_id(name, oa->o_id, oa->o_mode);
- sprintf(name, LPU64, oa->o_id);
- push_ctxt(&saved, &obd->u.filter.fo_ctxt, NULL);
- new = simple_mknod(filter_parent(obd, oa->o_mode), name, oa->o_mode);
- pop_ctxt(&saved);
- if (IS_ERR(new)) {
- CERROR("Error mknod obj %s, err %ld\n", name, PTR_ERR(new));
- return -ENOENT;
- }
+ fsfilt_sync(obd, obd->u.filter.fo_sb);
- /* Set flags for fields we have set in the inode struct */
- oa->o_valid = OBD_MD_FLID | OBD_MD_FLBLKSZ | OBD_MD_FLBLOCKS |
- OBD_MD_FLMTIME | OBD_MD_FLATIME | OBD_MD_FLCTIME;
- filter_from_inode(oa, new->d_inode, oa->o_valid);
- f_dput(new);
+ /* flush any remaining cancel messages out to the target */
+ ctxt = llog_get_context(obd, LLOG_UNLINK_REPL_CTXT);
+ llog_sync(ctxt, exp);
- return 0;
+ class_export_put(exp);
+ RETURN(rc);
}
-static int filter_destroy(struct lustre_handle *conn, struct obdo *oa,
- struct lov_stripe_md *ea)
+struct dentry *__filter_oa2dentry(struct obd_device *obd,
+ struct obdo *oa, const char *what)
{
- struct obd_device *obd = class_conn2obd(conn);
- struct dentry *dir_dentry, *object_dentry;
- struct filter_dentry_data *fdd;
- int rc;
- ENTRY;
-
- if (!obd) {
- CERROR("invalid client "LPX64"\n", conn->addr);
- RETURN(-EINVAL);
- }
-
- CDEBUG(D_INODE, "destroying objid "LPX64"\n", oa->o_id);
+ struct dentry *dchild = NULL;
+ obd_gr group = 0;
- dir_dentry = filter_parent(obd, oa->o_mode);
- down(&dir_dentry->d_inode->i_sem);
+ if (oa->o_valid & OBD_MD_FLGROUP)
+ group = oa->o_gr;
- object_dentry = filter_oa2dentry(conn, oa);
- if (IS_ERR(object_dentry))
- GOTO(out, rc = -ENOENT);
+ dchild = filter_fid2dentry(obd, NULL, group, oa->o_id);
- fdd = object_dentry->d_fsdata;
- if (fdd && atomic_read(&fdd->fdd_open_count)) {
- if (!(fdd->fdd_flags & FILTER_FLAG_DESTROY)) {
- fdd->fdd_flags |= FILTER_FLAG_DESTROY;
- /* XXX put into PENDING directory in case of crash */
- CDEBUG(D_INODE,
- "defer destroy of %dx open objid "LPX64"\n",
- atomic_read(&fdd->fdd_open_count), oa->o_id);
- } else
- CDEBUG(D_INODE,
- "repeat destroy of %dx open objid "LPX64"\n",
- atomic_read(&fdd->fdd_open_count), oa->o_id);
- GOTO(out_dput, rc = 0);
+ if (IS_ERR(dchild)) {
+ CERROR("%s error looking up object: "LPU64"\n", what, oa->o_id);
+ RETURN(dchild);
}
- rc = filter_destroy_internal(obd, dir_dentry, object_dentry);
-out_dput:
- f_dput(object_dentry);
-
- EXIT;
-out:
- up(&dir_dentry->d_inode->i_sem);
- return rc;
-}
-
-/* NB count and offset are used for punch, but not truncate */
-static int filter_truncate(struct lustre_handle *conn, struct obdo *oa,
- struct lov_stripe_md *lsm,
- obd_off start, obd_off end)
-{
- int error;
- ENTRY;
-
- if (end != OBD_OBJECT_EOF)
- CERROR("PUNCH not supported, only truncate works\n");
+ if (dchild->d_inode == NULL) {
+ CERROR("%s on non-existent object: "LPU64"\n", what, oa->o_id);
+ f_dput(dchild);
+ RETURN(ERR_PTR(-ENOENT));
+ }
- CDEBUG(D_INODE, "calling truncate for object "LPX64", valid = %x, "
- "o_size = "LPD64"\n", oa->o_id, oa->o_valid, start);
- oa->o_size = start;
- error = filter_setattr(conn, oa, NULL);
- RETURN(error);
+ return dchild;
}
-static int filter_pgcache_brw(int cmd, struct lustre_handle *conn,
- struct lov_stripe_md *lsm, obd_count oa_bufs,
- struct brw_page *pga, brw_cb_t callback,
- struct brw_cb_data *brw_cbd)
+static int filter_getattr(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *md)
{
- struct obd_export *export = class_conn2export(conn);
- struct obd_run_ctxt saved;
- struct super_block *sb;
- int pnum; /* index to pages (bufs) */
- unsigned long retval;
- int error;
- struct file *file;
- int pg;
+ struct dentry *dentry = NULL;
+ struct obd_device *obd;
+ int rc = 0;
ENTRY;
- if (!export) {
- CDEBUG(D_IOCTL, "invalid client "LPX64"\n", conn->addr);
+ obd = class_exp2obd(exp);
+ if (obd == NULL) {
+ CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
+ exp->exp_handle.h_cookie);
RETURN(-EINVAL);
}
- sb = export->exp_obd->u.filter.fo_sb;
- push_ctxt(&saved, &export->exp_obd->u.filter.fo_ctxt, NULL);
- pnum = 0; /* pnum indexes buf 0..num_pages */
-
- file = filter_obj_open(export, lsm->lsm_object_id, S_IFREG);
- if (IS_ERR(file))
- GOTO(out, retval = PTR_ERR(file));
-
- /* count doubles as retval */
- for (pg = 0; pg < oa_bufs; pg++) {
- CDEBUG(D_INODE, "OP %d obdo pgno: (%d) (%ld,"LPU64
- ") off count ("LPU64",%d)\n",
- cmd, pnum, file->f_dentry->d_inode->i_ino,
- pga[pnum].off >> PAGE_CACHE_SHIFT, pga[pnum].off,
- (int)pga[pnum].count);
- if (cmd & OBD_BRW_WRITE) {
- loff_t off;
- char *buffer;
- off = pga[pnum].off;
- buffer = kmap(pga[pnum].pg);
- retval = file->f_op->write(file, buffer,
- pga[pnum].count,
- &off);
- kunmap(pga[pnum].pg);
- CDEBUG(D_INODE, "retval %ld\n", retval);
- } else {
- loff_t off = pga[pnum].off;
- char *buffer = kmap(pga[pnum].pg);
-
- if (off >= file->f_dentry->d_inode->i_size) {
- memset(buffer, 0, pga[pnum].count);
- retval = pga[pnum].count;
- } else {
- retval = file->f_op->read(file, buffer,
- pga[pnum].count, &off);
- }
- kunmap(pga[pnum].pg);
-
- if (retval != pga[pnum].count) {
- filp_close(file, 0);
- GOTO(out, retval = -EIO);
- }
- CDEBUG(D_INODE, "retval %ld\n", retval);
- }
- pnum++;
- }
- /* sizes and blocks are set by generic_file_write */
- /* ctimes/mtimes will follow with a setattr call */
- filp_close(file, 0);
+ dentry = filter_oa2dentry(obd, oa);
+ if (IS_ERR(dentry))
+ RETURN(PTR_ERR(dentry));
- /* XXX: do something with callback if it is set? */
+ /* Limit the valid bits in the return data to what we actually use */
+ oa->o_valid = OBD_MD_FLID;
+ obdo_from_inode(oa, dentry->d_inode, FILTER_VALID_FLAGS);
- EXIT;
-out:
- pop_ctxt(&saved);
- error = (retval >= 0) ? 0 : retval;
- return error;
+ f_dput(dentry);
+ RETURN(rc);
}
-/*
- * Calculate the number of buffer credits needed to write multiple pages in
- * a single ext3/extN transaction. No, this shouldn't be here, but as yet
- * ext3 doesn't have a nice API for calculating this sort of thing in advance.
- *
- * See comment above ext3_writepage_trans_blocks for details. We assume
- * no data journaling is being done, but it does allow for all of the pages
- * being non-contiguous. If we are guaranteed contiguous pages we could
- * reduce the number of (d)indirect blocks a lot.
- *
- * With N blocks per page and P pages, for each inode we have at most:
- * N*P indirect
- * min(N*P, blocksize/4 + 1) dindirect blocks
- * 1 tindirect
- *
- * For the entire filesystem, we have at most:
- * min(sum(nindir + P), ngroups) bitmap blocks (from the above)
- * min(sum(nindir + P), gdblocks) group descriptor blocks (from the above)
- * 1 inode block
- * 1 superblock
- * 2 * EXT3_SINGLEDATA_TRANS_BLOCKS for the quota files
- */
-static int ext3_credits_needed(struct super_block *sb, int objcount,
- struct obd_ioobj *obj)
+/* this is called from filter_truncate() until we have filter_punch() */
+static int filter_setattr(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *md, struct obd_trans_info *oti)
{
- struct obd_ioobj *o = obj;
- int blockpp = 1 << (PAGE_CACHE_SHIFT - sb->s_blocksize_bits);
- int addrpp = EXT3_ADDR_PER_BLOCK(sb) * blockpp;
- int nbitmaps = 0;
- int ngdblocks = 0;
- int needed = objcount + 1;
- int i;
-
- for (i = 0; i < objcount; i++, o++) {
- int nblocks = o->ioo_bufcnt * blockpp;
- int ndindirect = min(nblocks, addrpp + 1);
- int nindir = nblocks + ndindirect + 1;
+ struct obd_run_ctxt saved;
+ struct filter_obd *filter;
+ struct dentry *dentry;
+ struct iattr iattr;
+ struct ldlm_res_id res_id = { .name = { oa->o_id } };
+ struct ldlm_resource *res;
+ void *handle;
+ int rc, rc2;
+ ENTRY;
- nbitmaps += nindir + nblocks;
- ngdblocks += nindir + nblocks;
+ LASSERT(oti != NULL);
- needed += nindir;
- }
+ dentry = filter_oa2dentry(exp->exp_obd, oa);
+ if (IS_ERR(dentry))
+ RETURN(PTR_ERR(dentry));
- /* Assumes ext3 and extN have same sb_info layout at the start. */
- if (nbitmaps > EXT3_SB(sb)->s_groups_count)
- nbitmaps = EXT3_SB(sb)->s_groups_count;
- if (ngdblocks > EXT3_SB(sb)->s_gdb_count)
- ngdblocks = EXT3_SB(sb)->s_gdb_count;
+ filter = &exp->exp_obd->u.filter;
- needed += nbitmaps + ngdblocks;
+ iattr_from_obdo(&iattr, oa, oa->o_valid);
-#ifdef CONFIG_QUOTA
- /* We assume that there will be 1 bit set in s_dquot.flags for each
- * quota file that is active. This is at least true for now.
- */
- needed += hweight32(sb_any_quota_enabled(sb)) *
- EXT3_SINGLEDATA_TRANS_BLOCKS;
-#endif
+ push_ctxt(&saved, &exp->exp_obd->obd_ctxt, NULL);
+ lock_kernel();
- return needed;
-}
+ if (iattr.ia_valid & ATTR_SIZE)
+ down(&dentry->d_inode->i_sem);
+ handle = fsfilt_start(exp->exp_obd, dentry->d_inode, FSFILT_OP_SETATTR,
+ oti);
+ if (IS_ERR(handle))
+ GOTO(out_unlock, rc = PTR_ERR(handle));
-/* We have to start a huge journal transaction here to hold all of the
- * metadata for the pages being written here. This is necessitated by
- * the fact that we do lots of prepare_write operations before we do
- * any of the matching commit_write operations, so even if we split
- * up to use "smaller" transactions none of them could complete until
- * all of them were opened. By having a single journal transaction,
- * we eliminate duplicate reservations for common blocks like the
- * superblock and group descriptors or bitmaps.
- *
- * We will start the transaction here, but each prepare_write will
- * add a refcount to the transaction, and each commit_write will
- * remove a refcount. The transaction will be closed when all of
- * the pages have been written.
- */
-static void *ext3_filter_journal_start(struct filter_obd *filter,
- int objcount, struct obd_ioobj *obj,
- int niocount, struct niobuf_remote *nb)
-{
- journal_t *journal = NULL;
- handle_t *handle = NULL;
- int needed;
+ /* XXX this could be a rwsem instead, if filter_preprw played along */
+ if (iattr.ia_valid & ATTR_ATTR_FLAG)
+ rc = fsfilt_iocontrol(exp->exp_obd, dentry->d_inode, NULL,
+ EXT3_IOC_SETFLAGS,
+ (long)&iattr.ia_attr_flags);
+ else
+ rc = fsfilt_setattr(exp->exp_obd, dentry, handle, &iattr, 1);
+ rc = filter_finish_transno(exp, oti, rc);
+ rc2 = fsfilt_commit(exp->exp_obd, dentry->d_inode, handle, 0);
+ if (rc2) {
+ CERROR("error on commit, err = %d\n", rc2);
+ if (!rc)
+ rc = rc2;
+ }
- /* It appears that some kernels have different values for
- * EXT*_MAX_GROUP_LOADED (either 8 or 32), so we cannot
- * assume anything after s_inode_bitmap_number is the same.
- */
- if (!strcmp(filter->fo_fstype, "ext3"))
- journal = EXT3_SB(filter->fo_sb)->s_journal;
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
- else if (!strcmp(filter->fo_fstype, "extN"))
- journal = EXTN_SB(filter->fo_sb)->s_journal;
-#endif
- needed = ext3_credits_needed(filter->fo_sb, objcount, obj);
-
- /* The number of blocks we could _possibly_ dirty can very large.
- * We reduce our request if it is absurd (and we couldn't get that
- * many credits for a single handle anyways).
- *
- * At some point we have to limit the size of I/Os sent at one time,
- * increase the size of the journal, or we have to calculate the
- * actual journal requirements more carefully by checking all of
- * the blocks instead of being maximally pessimistic. It remains to
- * be seen if this is a real problem or not.
- */
- if (needed > journal->j_max_transaction_buffers) {
- CERROR("want too many journal credits (%d) using %d instead\n",
- needed, journal->j_max_transaction_buffers);
- needed = journal->j_max_transaction_buffers;
+ if (iattr.ia_valid & ATTR_SIZE) {
+ res = ldlm_resource_get(exp->exp_obd->obd_namespace, NULL,
+ res_id, LDLM_EXTENT, 0);
+ if (res == NULL) {
+ CERROR("!!! resource_get failed for object "LPU64" -- "
+ "filter_setattr with no lock?\n", oa->o_id);
+ } else {
+ if (res->lr_namespace->ns_lvbo &&
+ res->lr_namespace->ns_lvbo->lvbo_update) {
+ rc = res->lr_namespace->ns_lvbo->lvbo_update
+ (res, NULL, 0, 0);
+ }
+ ldlm_resource_putref(res);
+ }
}
- lock_kernel();
- handle = journal_start(journal, needed);
+ oa->o_valid = OBD_MD_FLID;
+ obdo_from_inode(oa, dentry->d_inode, FILTER_VALID_FLAGS);
+
+out_unlock:
+ if (iattr.ia_valid & ATTR_SIZE)
+ up(&dentry->d_inode->i_sem);
unlock_kernel();
- if (IS_ERR(handle))
- CERROR("can't get handle for %d credits: rc = %ld\n", needed,
- PTR_ERR(handle));
+ pop_ctxt(&saved, &exp->exp_obd->obd_ctxt, NULL);
- return(handle);
+ f_dput(dentry);
+ RETURN(rc);
}
-static void *filter_journal_start(void **journal_save,
- struct filter_obd *filter,
- int objcount, struct obd_ioobj *obj,
- int niocount, struct niobuf_remote *nb)
+/* 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)
{
- void *handle = NULL;
-
- /* This may not be necessary - we probably never have a
- * transaction started when we enter here, so we can
- * remove the saving of the journal state entirely.
- * For now leave it in just to see if it ever happens.
- */
- *journal_save = current->journal_info;
- if (*journal_save) {
- CERROR("Already have handle %p???\n", *journal_save);
- LBUG();
- current->journal_info = NULL;
- }
+ int lsm_size;
+ ENTRY;
- if (!strcmp(filter->fo_fstype, "ext3") ||
- !strcmp(filter->fo_fstype, "extN"))
- handle = ext3_filter_journal_start(filter, objcount, obj,
- niocount, nb);
- return handle;
-}
+ 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? */
-static int ext3_filter_journal_stop(void *handle)
-{
- int rc;
+ if (lmm->lmm_object_id == cpu_to_le64(0)) {
+ CERROR("lov_mds_md: zero lmm_object_id\n");
+ RETURN(-EINVAL);
+ }
+ }
- /* We got a refcount on the handle for each call to prepare_write,
- * so we can drop the "parent" handle here to avoid the need for
- * osc to call back into filterobd to close the handle. The
- * remaining references will be dropped in commit_write.
- */
- lock_kernel();
- rc = journal_stop((handle_t *)handle);
- unlock_kernel();
+ lsm_size = lov_stripe_md_size(1);
+ if (lsmp == NULL)
+ RETURN(lsm_size);
- return rc;
-}
+ if (*lsmp != NULL && lmm == NULL) {
+ OBD_FREE(*lsmp, lsm_size);
+ *lsmp = NULL;
+ RETURN(0);
+ }
-static int filter_journal_stop(void *journal_save, struct filter_obd *filter,
- void *handle)
-{
- int rc = 0;
+ if (*lsmp == NULL) {
+ OBD_ALLOC(*lsmp, lsm_size);
+ if (*lsmp == NULL)
+ RETURN(-ENOMEM);
- if (!strcmp(filter->fo_fstype, "ext3") ||
- !strcmp(filter->fo_fstype, "extN"))
- rc = ext3_filter_journal_stop(handle);
+ loi_init((*lsmp)->lsm_oinfo);
+ }
- if (rc)
- CERROR("error on journal stop: rc = %d\n", rc);
+ if (lmm != NULL) {
+ /* XXX zero *lsmp? */
+ (*lsmp)->lsm_object_id = le64_to_cpu (lmm->lmm_object_id);
+ LASSERT((*lsmp)->lsm_object_id);
+ }
- current->journal_info = journal_save;
+ (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
- return rc;
+ RETURN(lsm_size);
}
-static inline void lustre_put_page(struct page *page)
+static void filter_destroy_precreated(struct obd_export *exp, struct obdo *oa,
+ struct filter_obd *filter)
{
- kunmap(page);
- page_cache_release(page);
-}
+ struct obdo doa; /* XXX obdo on stack */
+ __u64 last, id;
+ ENTRY;
+ LASSERT(oa);
+ memset(&doa, 0, sizeof(doa));
+ if (oa->o_valid & OBD_MD_FLGROUP)
+ doa.o_gr = oa->o_gr;
+ else
+ doa.o_gr = 0;
+ doa.o_mode = S_IFREG;
+ last = filter_last_id(filter, &doa); /* FIXME: object groups */
+ CWARN("deleting orphan objects from "LPU64" to "LPU64"\n",
+ oa->o_id + 1, last);
+ for (id = oa->o_id + 1; id <= last; id++) {
+ doa.o_id = id;
+ filter_destroy(exp, &doa, NULL, NULL);
+ }
+ spin_lock(&filter->fo_objidlock);
+ filter->fo_last_objids[0] = oa->o_id; /* FIXME: object groups */
+ spin_unlock(&filter->fo_objidlock);
+ EXIT;
+}
-static struct page *
-lustre_get_page_read(struct inode *inode, struct niobuf_remote *rnb)
+/* returns a negative error or a nonnegative number of files to create */
+static int filter_should_precreate(struct obd_export *exp, struct obdo *oa,
+ int group)
{
- unsigned long index = rnb->offset >> PAGE_SHIFT;
- struct address_space *mapping = inode->i_mapping;
- struct page *page;
- int rc;
+ struct obd_device *obd = exp->exp_obd;
+ struct filter_obd *filter = &obd->u.filter;
+ int diff, rc;
+ ENTRY;
- page = read_cache_page(mapping, index,
- (filler_t*)mapping->a_ops->readpage, NULL);
- if (!IS_ERR(page)) {
- wait_on_page(page);
- kmap(page);
- if (!PageUptodate(page)) {
- CERROR("page index %lu not uptodate\n", index);
- GOTO(err_page, rc = -EIO);
- }
- if (PageError(page)) {
- CERROR("page index %lu has error\n", index);
- GOTO(err_page, rc = -EIO);
+ diff = oa->o_id - filter_last_id(filter, oa);
+ CDEBUG(D_INFO, "filter_last_id() = "LPU64" -> diff = %d\n",
+ filter_last_id(filter, oa), diff);
+
+ /* delete orphans request */
+ if ((oa->o_valid & OBD_MD_FLFLAGS) &&
+ (oa->o_flags & OBD_FL_DELORPHAN)) {
+ if (diff >= 0)
+ RETURN(diff);
+ if (-diff > 10000) { /* XXX make this smarter */
+ CERROR("ignoring bogus orphan destroy request: obdid "
+ LPU64" last_id "LPU64"\n",
+ oa->o_id, filter_last_id(filter, oa));
+ RETURN(-EINVAL);
}
- }
- return page;
+ filter_destroy_precreated(exp, oa, filter);
+ rc = filter_update_last_objid(obd, group, 0);
+ if (rc)
+ CERROR("unable to write lastobjid, but orphans"
+ "were deleted\n");
+ RETURN(0);
+ } else {
+ /* only precreate if group == 0 and o_id is specfied */
+ if (!(oa->o_valid & OBD_FL_DELORPHAN) &&
+ (group != 0 || oa->o_id == 0))
+ RETURN(1);
-err_page:
- lustre_put_page(page);
- return ERR_PTR(rc);
+ LASSERT(diff >= 0);
+ RETURN(diff);
+ }
}
-static struct page *
-lustre_get_page_write(struct inode *inode, unsigned long index)
+/* 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
+ */
+static int filter_precreate(struct obd_device *obd, struct obdo *oa,
+ obd_gr group, int *num)
{
- struct address_space *mapping = inode->i_mapping;
- struct page *page;
- int rc;
+ struct dentry *dchild = NULL;
+ struct filter_obd *filter;
+ struct dentry *dparent;
+ int err = 0, rc = 0, i;
+ __u64 next_id;
+ int recreate_obj = 0;
+ void *handle = NULL;
+ ENTRY;
- page = grab_cache_page(mapping, index); /* locked page */
+ filter = &obd->u.filter;
- if (!IS_ERR(page)) {
- kmap(page);
- /* Note: Called with "O" and "PAGE_SIZE" this is essentially
- * a no-op for most filesystems, because we write the whole
- * page. For partial-page I/O this will read in the page.
- */
- rc = mapping->a_ops->prepare_write(NULL, page, 0, PAGE_SIZE);
+ if ((oa->o_valid & OBD_MD_FLFLAGS) &&
+ (oa->o_flags & OBD_FL_RECREATE_OBJS)) {
+ recreate_obj = 1;
+ }
+
+ for (i = 0; i < *num && err == 0; i++) {
+ int cleanup_phase = 0;
+
+ if (recreate_obj) {
+ __u64 last_id;
+ next_id = oa->o_id;
+ last_id = filter_last_id(filter, NULL);
+ if (next_id > last_id) {
+ CERROR("Error: Trying to recreate obj greater"
+ "than last id "LPD64" > "LPD64"\n",
+ next_id, last_id);
+ RETURN(-EINVAL);
+ }
+ } else
+ next_id = filter_last_id(filter, NULL) + 1;
+
+ CDEBUG(D_INFO, "precreate objid "LPU64"\n", next_id);
+
+ dparent = filter_parent_lock(obd, group, next_id);
+ if (IS_ERR(dparent))
+ GOTO(cleanup, rc = PTR_ERR(dparent));
+ cleanup_phase = 1;
+
+ dchild = filter_fid2dentry(obd, dparent, group, next_id);
+ if (IS_ERR(dchild))
+ GOTO(cleanup, rc = PTR_ERR(dchild));
+ cleanup_phase = 2;
+
+ if (dchild->d_inode != NULL) {
+ /* This would only happen if lastobjid was bad on disk*/
+ /* Could also happen if recreating missing obj but
+ * already exists
+ */
+ if (recreate_obj) {
+ CERROR("Serious error: recreating obj %*s but "
+ "obj already exists \n",
+ dchild->d_name.len, dchild->d_name.name);
+ } else {
+ CERROR("Serious error: objid %*s already "
+ "exists; is this filesystem corrupt?\n",
+ dchild->d_name.len, dchild->d_name.name);
+ }
+ GOTO(cleanup, rc = -EEXIST);
+ }
+
+ handle = fsfilt_start(obd, dparent->d_inode,
+ FSFILT_OP_CREATE_LOG, NULL);
+ if (IS_ERR(handle))
+ GOTO(cleanup, rc = PTR_ERR(handle));
+ cleanup_phase = 3;
+
+ rc = ll_vfs_create(dparent->d_inode, dchild, S_IFREG, NULL);
if (rc) {
- CERROR("page index %lu, rc = %d\n", index, rc);
- if (rc != -ENOSPC)
- LBUG();
- GOTO(err_unlock, rc);
+ CERROR("create failed rc = %d\n", rc);
+ GOTO(cleanup, rc);
}
- /* XXX not sure if we need this if we are overwriting page */
- if (PageError(page)) {
- CERROR("error on page index %lu, rc = %d\n", index, rc);
- LBUG();
- GOTO(err_unlock, rc = -EIO);
+
+ if (!recreate_obj) {
+ filter_set_last_id(filter, NULL, next_id);
+ err = filter_update_last_objid(obd, group, 0);
+ if (err)
+ CERROR("unable to write lastobjid "
+ "but file created\n");
}
- }
- return page;
-err_unlock:
- unlock_page(page);
- lustre_put_page(page);
- return ERR_PTR(rc);
-}
+ 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 (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
-int waitfor_one_page(struct page *page)
-{
- wait_on_page_locked(page);
- return 0;
-}
-#endif
+ if (rc)
+ break;
+ }
+ *num = i;
-static int lustre_commit_write(struct page *page, unsigned from, unsigned to)
-{
- struct inode *inode = page->mapping->host;
- int err;
-
- err = page->mapping->a_ops->commit_write(NULL, page, from, to);
- if (!err && IS_SYNC(inode))
- err = waitfor_one_page(page);
- //SetPageUptodate(page); // the client commit_write will do this
-
- SetPageReferenced(page);
- unlock_page(page);
- lustre_put_page(page);
- return err;
+ CDEBUG(D_INFO, "filter_precreate() created %d objects\n", i);
+ RETURN(rc);
}
-struct page *filter_get_page_write(struct inode *inode,
- struct niobuf_remote *rnb,
- struct niobuf_local *lnb, int *pglocked)
+static int filter_create(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md **ea, struct obd_trans_info *oti)
{
- unsigned long index = rnb->offset >> PAGE_SHIFT;
- struct address_space *mapping = inode->i_mapping;
-
- struct page *page;
- int rc;
+ struct obd_device *obd = NULL;
+ struct obd_run_ctxt saved;
+ struct lov_stripe_md *lsm = NULL;
+ obd_gr group = 0;
+ int rc = 0, diff;
+ ENTRY;
- //ASSERT_PAGE_INDEX(index, GOTO(err, rc = -EINVAL));
- if (*pglocked)
- page = grab_cache_page_nowait(mapping, index); /* locked page */
- else
- page = grab_cache_page(mapping, index); /* locked page */
+ if (oa->o_valid & OBD_MD_FLGROUP)
+ group = oa->o_gr;
+
+ CDEBUG(D_INFO, "filter_create(od->o_gr="LPU64",od->o_id="LPU64")\n",
+ group, oa->o_id);
+ 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_ctxt, NULL);
- /* This page is currently locked, so get a temporary page instead. */
- /* XXX I believe this is a very dangerous thing to do - consider if
- * we had multiple writers for the same file (definitely the case
- * if we are using this codepath). If writer A locks the page,
- * writer B writes to a copy (as here), writer A drops the page
- * lock, and writer C grabs the lock before B does, then B will
- * later overwrite the data from C, even if C had LDLM locked
- * and initiated the write after B did.
- */
- if (!page) {
- unsigned long addr;
- CDEBUG(D_PAGE, "ino %ld page %ld locked\n", inode->i_ino,index);
- addr = __get_free_pages(GFP_KERNEL, 0); /* locked page */
- if (!addr) {
- CERROR("no memory for a temp page\n");
- LBUG();
- GOTO(err, rc = -ENOMEM);
- }
- /* XXX debugging */
- memset((void *)addr, 0xBA, PAGE_SIZE);
- page = virt_to_page(addr);
- kmap(page);
- page->index = index;
- lnb->flags |= N_LOCAL_TEMP_PAGE;
- } else if (!IS_ERR(page)) {
- (*pglocked)++;
- kmap(page);
-
- rc = mapping->a_ops->prepare_write(NULL, page,
- rnb->offset % PAGE_SIZE,
- rnb->len);
- if (rc) {
- CERROR("page index %lu, rc = %d\n", index, rc);
- if (rc != -ENOSPC)
- LBUG();
- GOTO(err_unlock, rc);
+ if ((oa->o_valid & OBD_MD_FLFLAGS) &&
+ (oa->o_flags & OBD_FL_RECREATE_OBJS)) {
+ if (oa->o_id > filter_last_id(&obd->u.filter, oa)) {
+ CERROR("recreate objid "LPU64" > last id "LPU64"\n",
+ oa->o_id, filter_last_id(&obd->u.filter, oa));
+ rc = -EINVAL;
+ } else {
+ diff = 1;
+ rc = filter_precreate(obd, oa, group, &diff);
}
- /* XXX not sure if we need this if we are overwriting page */
- if (PageError(page)) {
- CERROR("error on page index %lu, rc = %d\n", index, rc);
- LBUG();
- GOTO(err_unlock, rc = -EIO);
+ } else {
+ diff = filter_should_precreate(exp, oa, group);
+ if (diff > 0) {
+ oa->o_id = filter_last_id(&obd->u.filter, oa);
+ rc = filter_precreate(obd, oa, group, &diff);
+ oa->o_id += diff;
+ oa->o_valid = OBD_MD_FLID;
}
}
- return page;
-
-err_unlock:
- unlock_page(page);
- lustre_put_page(page);
-err:
- return ERR_PTR(rc);
-}
-/*
- * We need to balance prepare_write() calls with commit_write() calls.
- * If the page has been prepared, but we have no data for it, we don't
- * want to overwrite valid data on disk, but we still need to zero out
- * data for space which was newly allocated. Like part of what happens
- * in __block_prepare_write() for newly allocated blocks.
- *
- * XXX currently __block_prepare_write() creates buffers for all the
- * pages, and the filesystems mark these buffers as BH_New if they
- * were newly allocated from disk. We use the BH_New flag similarly.
- */
-static int filter_commit_write(struct page *page, unsigned from, unsigned to,
- int err)
-{
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
- if (err) {
- unsigned block_start, block_end;
- struct buffer_head *bh, *head = page->buffers;
- unsigned blocksize = head->b_size;
- void *addr = page_address(page);
-
- /* debugging: just seeing if this ever happens */
- CERROR("called filter_commit_write for obj %ld:%ld on err %d\n",
- page->index, page->mapping->host->i_ino, err);
-
- /* Currently one buffer per page, but in the future... */
- for (bh = head, block_start = 0; bh != head || !block_start;
- block_start = block_end, bh = bh->b_this_page) {
- block_end = block_start + blocksize;
- if (buffer_new(bh))
- memset(addr + block_start, 0, blocksize);
- }
+ pop_ctxt(&saved, &obd->obd_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;
}
-#endif
- return lustre_commit_write(page, from, to);
+
+ RETURN(rc);
}
-static int filter_preprw(int cmd, struct lustre_handle *conn,
- int objcount, struct obd_ioobj *obj,
- int niocount, struct niobuf_remote *nb,
- struct niobuf_local *res, void **desc_private)
+static int filter_destroy(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *ea, struct obd_trans_info *oti)
{
- struct obd_run_ctxt saved;
struct obd_device *obd;
- struct obd_ioobj *o = obj;
- struct niobuf_remote *rnb = nb;
- struct niobuf_local *lnb = res;
- void *journal_save = NULL;
- int pglocked = 0;
- int rc = 0;
- int i;
+ struct filter_obd *filter;
+ struct dentry *dchild = NULL, *dparent = NULL;
+ struct obd_run_ctxt saved;
+ void *handle = NULL;
+ struct llog_cookie *fcc = NULL;
+ int rc, rc2, cleanup_phase = 0, have_prepared = 0;
+ obd_gr group = 0;
ENTRY;
- obd = class_conn2obd(conn);
- if (!obd) {
- CDEBUG(D_IOCTL, "invalid client "LPX64"\n", conn->addr);
- RETURN(-EINVAL);
- }
- memset(res, 0, sizeof(*res) * niocount);
+ if (oa->o_valid & OBD_MD_FLGROUP)
+ group = oa->o_gr;
- push_ctxt(&saved, &obd->u.filter.fo_ctxt, NULL);
-
- if (cmd & OBD_BRW_WRITE) {
- *desc_private = filter_journal_start(&journal_save,
- &obd->u.filter,
- objcount, obj, niocount,
- nb);
- if (IS_ERR(*desc_private))
- GOTO(out_ctxt, rc = PTR_ERR(*desc_private));
- }
+ obd = exp->exp_obd;
+ filter = &obd->u.filter;
- obd_kmap_get(niocount, 1);
+ push_ctxt(&saved, &obd->obd_ctxt, NULL);
- for (i = 0; i < objcount; i++, o++) {
- struct dentry *dentry;
- struct inode *inode;
- int j;
+ acquire_locks:
+ dparent = filter_parent_lock(obd, group, oa->o_id);
+ if (IS_ERR(dparent))
+ GOTO(cleanup, rc = PTR_ERR(dparent));
+ cleanup_phase = 1;
- dentry = filter_fid2dentry(obd, filter_parent(obd, S_IFREG),
- o->ioo_id, S_IFREG);
- if (IS_ERR(dentry))
- GOTO(out_clean, rc = PTR_ERR(dentry));
- inode = dentry->d_inode;
- if (!inode) {
- CERROR("trying to BRW to non-existent file "LPU64"\n",
- o->ioo_id);
- f_dput(dentry);
- GOTO(out_clean, rc = -ENOENT);
- }
+ dchild = filter_fid2dentry(obd, dparent, group, oa->o_id);
+ if (IS_ERR(dchild))
+ GOTO(cleanup, rc = -ENOENT);
+ cleanup_phase = 2;
- for (j = 0; j < o->ioo_bufcnt; j++, rnb++, lnb++) {
- struct page *page;
+ if (dchild->d_inode == NULL) {
+ CDEBUG(D_INODE, "destroying non-existent object "LPU64"\n",
+ oa->o_id);
+ GOTO(cleanup, rc = -ENOENT);
+ }
- if (j == 0)
- lnb->dentry = dentry;
- else
- lnb->dentry = dget(dentry);
+ if (!have_prepared) {
+ /* If we're really going to destroy the object, get ready
+ * by getting the clients to discard their cached data.
+ *
+ * We have to drop the parent lock, because
+ * filter_prepare_destroy will acquire a PW on the object, and
+ * we don't want to deadlock with an incoming write to the
+ * object, which has the extent PW and then wants to get the
+ * parent dentry to do the lookup.
+ *
+ * We dput the child because it's not worth the extra
+ * complication of condition the above code to skip it on the
+ * second time through. */
+ f_dput(dchild);
+ filter_parent_unlock(dparent);
+
+ filter_prepare_destroy(obd, oa->o_id);
+ have_prepared = 1;
+ goto acquire_locks;
+ }
- if (cmd & OBD_BRW_WRITE)
- page = filter_get_page_write(inode, rnb, lnb,
- &pglocked);
- else
- page = lustre_get_page_read(inode, rnb);
+ handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_UNLINK_LOG, oti);
+ if (IS_ERR(handle))
+ GOTO(cleanup, rc = PTR_ERR(handle));
+ cleanup_phase = 3;
+
+ /* 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)
+ memcpy(fcc, obdo_logcookie(oa), sizeof(*fcc));
+ }
- if (IS_ERR(page)) {
- f_dput(dentry);
- GOTO(out_clean, rc = PTR_ERR(page));
- }
+ rc = filter_destroy_internal(obd, oa->o_id, dparent, dchild);
- lnb->addr = page_address(page);
- lnb->offset = rnb->offset;
- lnb->page = page;
- lnb->len = rnb->len;
+cleanup:
+ switch(cleanup_phase) {
+ case 3:
+ if (fcc != NULL) {
+ if (oti != NULL)
+ fsfilt_add_journal_cb(obd, 0, oti->oti_handle,
+ filter_cancel_cookies_cb,
+ fcc);
+ else
+ fsfilt_add_journal_cb(obd, 0, handle,
+ filter_cancel_cookies_cb,
+ fcc);
}
+ rc = filter_finish_transno(exp, oti, rc);
+ rc2 = fsfilt_commit(obd, dparent->d_inode, handle, 0);
+ if (rc2) {
+ CERROR("error on commit, err = %d\n", rc2);
+ if (!rc)
+ rc = rc2;
+ }
+ case 2:
+ f_dput(dchild);
+ case 1:
+ filter_parent_unlock(dparent);
+ case 0:
+ pop_ctxt(&saved, &obd->obd_ctxt, NULL);
+ break;
+ default:
+ CERROR("invalid cleanup_phase %d\n", cleanup_phase);
+ LBUG();
}
-out_stop:
- if (cmd & OBD_BRW_WRITE) {
- int err = filter_journal_stop(journal_save, &obd->u.filter,
- *desc_private);
- if (!rc)
- rc = err;
- }
-out_ctxt:
- pop_ctxt(&saved);
RETURN(rc);
-out_clean:
- while (lnb-- > res) {
- CERROR("error cleanup on brw\n");
- f_dput(lnb->dentry);
- if (cmd & OBD_BRW_WRITE)
- filter_commit_write(lnb->page, 0, PAGE_SIZE, rc);
- else
- lustre_put_page(lnb->page);
- }
- obd_kmap_put(niocount);
- goto out_stop;
}
-static int filter_write_locked_page(struct niobuf_local *lnb)
+/* NB start and end are used for punch, but not truncate */
+static int filter_truncate(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *lsm,
+ obd_off start, obd_off end,
+ struct obd_trans_info *oti)
{
- struct page *lpage;
- int rc;
-
- lpage = lustre_get_page_write(lnb->dentry->d_inode, lnb->page->index);
- if (IS_ERR(lpage)) {
- /* It is highly unlikely that we would ever get an error here.
- * The page we want to get was previously locked, so it had to
- * have already allocated the space, and we were just writing
- * over the same data, so there would be no hole in the file.
- *
- * XXX: possibility of a race with truncate could exist, need
- * to check that. There are no guarantees w.r.t.
- * write order even on a local filesystem, although the
- * normal response would be to return the number of bytes
- * successfully written and leave the rest to the app.
- */
- rc = PTR_ERR(lpage);
- CERROR("error getting locked page index %ld: rc = %d\n",
- lnb->page->index, rc);
- GOTO(out, rc);
- }
+ int error;
+ ENTRY;
- /* lpage is kmapped in lustre_get_page_write() above and kunmapped in
- * lustre_commit_write() below, lnb->page was kmapped previously in
- * filter_get_page_write() and kunmapped in lustre_put_page() below.
- */
- memcpy(page_address(lpage), page_address(lnb->page), PAGE_SIZE);
- rc = lustre_commit_write(lpage, 0, PAGE_SIZE);
- if (rc)
- CERROR("error committing locked page %ld: rc = %d\n",
- lnb->page->index, rc);
-out:
- lustre_put_page(lnb->page);
+ if (end != OBD_OBJECT_EOF)
+ CERROR("PUNCH not supported, only truncate: end = "LPX64"\n",
+ end);
- return rc;
+ CDEBUG(D_INODE, "calling truncate for object "LPU64", valid = %x, "
+ "o_size = "LPD64"\n", oa->o_id, oa->o_valid, start);
+ oa->o_size = start;
+ error = filter_setattr(exp, oa, NULL, oti);
+ RETURN(error);
}
-static int filter_commitrw(int cmd, struct lustre_handle *conn,
- int objcount, struct obd_ioobj *obj,
- int niocount, struct niobuf_local *res,
- void *private)
+static int filter_sync(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *lsm, obd_off start, obd_off end)
{
struct obd_run_ctxt saved;
- struct obd_ioobj *o;
- struct niobuf_local *r;
- struct obd_device *obd = class_conn2obd(conn);
- void *journal_save;
- int found_locked = 0;
- int rc = 0;
- int i;
+ struct filter_obd *filter;
+ struct dentry *dentry;
+ struct llog_ctxt *ctxt;
+ int rc, rc2;
ENTRY;
- push_ctxt(&saved, &obd->u.filter.fo_ctxt, NULL);
- lock_kernel();
- journal_save = current->journal_info;
- LASSERT(!journal_save);
+ filter = &exp->exp_obd->u.filter;
- current->journal_info = private;
- unlock_kernel();
- for (i = 0, o = obj, r = res; i < objcount; i++, o++) {
- int j;
- for (j = 0 ; j < o->ioo_bufcnt ; j++, r++) {
- struct page *page = r->page;
+ /* an objid of zero is taken to mean "sync whole filesystem" */
+ if (!oa || !(oa->o_valid & OBD_MD_FLID)) {
+ rc = fsfilt_sync(exp->exp_obd, filter->fo_sb);
+ /* flush any remaining cancel messages out to the target */
+ ctxt = llog_get_context(exp->exp_obd, LLOG_UNLINK_REPL_CTXT);
+ llog_sync(ctxt, exp);
+ RETURN(rc);
+ }
- if (!page)
- LBUG();
+ dentry = filter_oa2dentry(exp->exp_obd, oa);
+ if (IS_ERR(dentry))
+ RETURN(PTR_ERR(dentry));
- if (r->flags & N_LOCAL_TEMP_PAGE) {
- found_locked++;
- continue;
- }
+ push_ctxt(&saved, &exp->exp_obd->obd_ctxt, NULL);
- if (cmd & OBD_BRW_WRITE) {
- int err = filter_commit_write(page, 0,
- r->len, 0);
+ down(&dentry->d_inode->i_sem);
+ rc = filemap_fdatasync(dentry->d_inode->i_mapping);
+ if (rc == 0) {
+ /* just any file to grab fsync method - "file" arg unused */
+ struct file *file = filter->fo_rcvd_filp;
- if (!rc)
- rc = err;
- } else
- lustre_put_page(page);
+ if (file->f_op && file->f_op->fsync)
+ rc = file->f_op->fsync(NULL, dentry, 1);
- obd_kmap_put(1);
- f_dput(r->dentry);
- }
+ rc2 = filemap_fdatawait(dentry->d_inode->i_mapping);
+ if (!rc)
+ rc = rc2;
}
- lock_kernel();
- current->journal_info = journal_save;
- unlock_kernel();
+ up(&dentry->d_inode->i_sem);
- if (!found_locked)
- goto out_ctxt;
+ oa->o_valid = OBD_MD_FLID;
+ obdo_from_inode(oa, dentry->d_inode, FILTER_VALID_FLAGS);
- for (i = 0, o = obj, r = res; i < objcount; i++, o++) {
- int j;
- for (j = 0 ; j < o->ioo_bufcnt ; j++, r++) {
- int err;
- if (!(r->flags & N_LOCAL_TEMP_PAGE))
- continue;
+ pop_ctxt(&saved, &exp->exp_obd->obd_ctxt, NULL);
- err = filter_write_locked_page(r);
- obd_kmap_put(1);
- if (!rc)
- rc = err;
- f_dput(r->dentry);
- }
- }
-
-out_ctxt:
- pop_ctxt(&saved);
+ f_dput(dentry);
RETURN(rc);
}
-static int filter_statfs(struct lustre_handle *conn, struct obd_statfs *osfs)
+static int filter_statfs(struct obd_device *obd, struct obd_statfs *osfs,
+ unsigned long max_age)
{
- struct obd_device *obd = class_conn2obd(conn);
- struct statfs sfs;
+ struct filter_obd *filter = &obd->u.filter;
+ int blockbits = filter->fo_sb->s_blocksize_bits;
int rc;
-
ENTRY;
- rc = vfs_statfs(obd->u.filter.fo_sb, &sfs);
- if (!rc)
- statfs_pack(osfs, &sfs);
- return rc;
+ /* 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 */
+ spin_lock(&obd->obd_osfs_lock);
+ rc = fsfilt_statfs(obd, filter->fo_sb, max_age);
+ memcpy(osfs, &obd->obd_osfs, sizeof(*osfs));
+ 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, __FUNCTION__);
+
+ osfs->os_bavail -= min(osfs->os_bavail,
+ (filter->fo_tot_dirty + filter->fo_tot_pending +
+ osfs->os_bsize -1) >> blockbits);
+
+ RETURN(rc);
}
-static int filter_get_info(struct lustre_handle *conn, obd_count keylen,
- void *key, obd_count *vallen, void **val)
+static int filter_get_info(struct obd_export *exp, __u32 keylen,
+ void *key, __u32 *vallen, void *val)
{
struct obd_device *obd;
ENTRY;
- obd = class_conn2obd(conn);
- if (!obd) {
- CDEBUG(D_IOCTL, "invalid client "LPX64"\n", conn->addr);
+ obd = class_exp2obd(exp);
+ if (obd == NULL) {
+ CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
+ exp->exp_handle.h_cookie);
RETURN(-EINVAL);
}
- if ( keylen == strlen("blocksize") &&
- memcmp(key, "blocksize", keylen) == 0 ) {
- *vallen = sizeof(long);
- *val = (void *)(long)obd->u.filter.fo_sb->s_blocksize;
+ if (keylen == strlen("blocksize") &&
+ memcmp(key, "blocksize", keylen) == 0) {
+ __u32 *blocksize = val;
+ *vallen = sizeof(*blocksize);
+ *blocksize = obd->u.filter.fo_sb->s_blocksize;
RETURN(0);
}
- if ( keylen == strlen("blocksize_bits") &&
- memcmp(key, "blocksize_bits", keylen) == 0 ){
- *vallen = sizeof(long);
- *val = (void *)(long)obd->u.filter.fo_sb->s_blocksize_bits;
+ if (keylen == strlen("blocksize_bits") &&
+ memcmp(key, "blocksize_bits", keylen) == 0) {
+ __u32 *blocksize_bits = val;
+ *vallen = sizeof(*blocksize_bits);
+ *blocksize_bits = obd->u.filter.fo_sb->s_blocksize_bits;
RETURN(0);
}
- if ( keylen == strlen("root_ino") &&
- memcmp(key, "root_ino", keylen) == 0 ){
- *vallen = sizeof(obd_id);
- *val = (void *)(obd_id)FILTER_ROOTINO;
+ if (keylen >= strlen("last_id") && memcmp(key, "last_id", 7) == 0) {
+ obd_id *last_id = val;
+ /* FIXME: object groups */
+ *last_id = filter_last_id(&obd->u.filter, 0);
RETURN(0);
}
-
CDEBUG(D_IOCTL, "invalid key\n");
RETURN(-EINVAL);
}
-int filter_copy_data(struct lustre_handle *dst_conn, struct obdo *dst,
- struct lustre_handle *src_conn, struct obdo *src,
- obd_size count, obd_off offset)
+static int filter_set_info(struct obd_export *exp, __u32 keylen,
+ void *key, __u32 vallen, void *val)
{
- struct page *page;
- struct lov_stripe_md srcmd, dstmd;
- unsigned long index = 0;
- int err = 0;
+ struct obd_device *obd;
+ struct lustre_handle conn;
+ struct llog_ctxt *ctxt;
+ int rc = 0;
+ ENTRY;
- memset(&srcmd, 0, sizeof(srcmd));
- memset(&dstmd, 0, sizeof(dstmd));
- srcmd.lsm_object_id = src->o_id;
- dstmd.lsm_object_id = dst->o_id;
+ conn.cookie = exp->exp_handle.h_cookie;
- ENTRY;
- CDEBUG(D_INFO, "src: ino "LPU64" blocks "LPU64", size "LPU64
- ", dst: ino "LPU64"\n",
- src->o_id, src->o_blocks, src->o_size, dst->o_id);
- page = alloc_page(GFP_USER);
- if (page == NULL)
- RETURN(-ENOMEM);
+ obd = exp->exp_obd;
+ if (obd == NULL) {
+ CDEBUG(D_IOCTL, "invalid exp %p cookie "LPX64"\n",
+ exp, conn.cookie);
+ RETURN(-EINVAL);
+ }
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
- while (TryLockPage(page))
- ___wait_on_page(page);
-#else
- wait_on_page_locked(page);
-#endif
+ if (keylen < strlen("mds_conn") ||
+ memcmp(key, "mds_conn", keylen) != 0)
+ RETURN(-EINVAL);
- /* XXX with brw vector I/O, we could batch up reads and writes here,
- * all we need to do is allocate multiple pages to handle the I/Os
- * and arrays to handle the request parameters.
- */
- while (index < ((src->o_size + PAGE_SIZE - 1) >> PAGE_SHIFT)) {
- struct brw_page pg;
- struct brw_cb_data *brw_cbd = ll_init_brw_cb_data();
+ CWARN("Received MDS connection ("LPX64")\n", conn.cookie);
+ memcpy(&obd->u.filter.fo_mdc_conn, &conn, sizeof(conn));
+ ctxt = llog_get_context(obd, LLOG_UNLINK_REPL_CTXT);
+ rc = llog_receptor_accept(ctxt, exp->exp_imp_reverse);
+ RETURN(rc);
+}
- if (!brw_cbd) {
- err = -ENOMEM;
- EXIT;
- break;
- }
+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;
- pg.pg = page;
- pg.count = PAGE_SIZE;
- pg.off = (page->index) << PAGE_SHIFT;
- pg.flag = 0;
+ switch (cmd) {
+ case OBD_IOC_ABORT_RECOVERY:
+ CERROR("aborting recovery for device %s\n", obd->obd_name);
+ target_abort_recovery(obd);
+ RETURN(0);
- page->index = index;
- err = obd_brw(OBD_BRW_READ, src_conn, &srcmd, 1, &pg,
- ll_sync_brw_cb, brw_cbd);
+ case OBD_IOC_SET_READONLY: {
+ void *handle;
+ struct super_block *sb = obd->u.filter.fo_sb;
+ struct inode *inode = sb->s_root->d_inode;
+ BDEVNAME_DECLARE_STORAGE(tmp);
+ CERROR("setting device %s read-only\n",
+ ll_bdevname(sb, tmp));
- if ( err ) {
- EXIT;
- break;
- }
+ handle = fsfilt_start(obd, inode, FSFILT_OP_MKNOD, NULL);
+ LASSERT(handle);
+ (void)fsfilt_commit(obd, inode, handle, 1);
- brw_cbd = ll_init_brw_cb_data();
- if (!brw_cbd) {
- err = -ENOMEM;
- EXIT;
- break;
- }
- pg.flag = OBD_BRW_CREATE;
- CDEBUG(D_INFO, "Read page %ld ...\n", page->index);
+ dev_set_rdonly(ll_sbdev(obd->u.filter.fo_sb), 2);
+ RETURN(0);
+ }
+
+ case OBD_IOC_CATLOGLIST: {
+ rc = llog_catlog_list(obd, 1, data);
+ RETURN(rc);
+ }
- err = obd_brw(OBD_BRW_WRITE, dst_conn, &dstmd, 1, &pg,
- ll_sync_brw_cb, brw_cbd);
+ 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;
- /* XXX should handle dst->o_size, dst->o_blocks here */
- if ( err ) {
- EXIT;
- break;
- }
+ push_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_ctxt, NULL);
+ rc = llog_ioctl(ctxt, cmd, data);
+ pop_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_ctxt, NULL);
+
+ RETURN(rc);
+*/
+ }
- CDEBUG(D_INFO, "Wrote page %ld ...\n", page->index);
- index++;
+ default:
+ RETURN(-EINVAL);
}
- dst->o_size = src->o_size;
- dst->o_blocks = src->o_blocks;
- dst->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
- unlock_page(page);
- __free_page(page);
+ RETURN(0);
+}
+
+static struct llog_operations filter_unlink_repl_logops;
+static struct llog_operations filter_size_orig_logops = {
+ lop_setup: llog_obd_origin_setup,
+ lop_cleanup: llog_obd_origin_cleanup,
+ lop_add: llog_obd_origin_add
+};
+
+static int filter_llog_init(struct obd_device *obd, struct obd_device *tgt,
+ int count, struct llog_catid *logid)
+{
+ struct llog_ctxt *ctxt;
+ int rc;
+ ENTRY;
+
+ filter_unlink_repl_logops = llog_client_ops;
+ filter_unlink_repl_logops.lop_cancel = llog_obd_repl_cancel;
+ filter_unlink_repl_logops.lop_connect = llog_repl_connect;
+ filter_unlink_repl_logops.lop_sync = llog_obd_repl_sync;
- RETURN(err);
+ rc = llog_setup(obd, LLOG_UNLINK_REPL_CTXT, tgt, 0, NULL,
+ &filter_unlink_repl_logops);
+ if (rc)
+ RETURN(rc);
+ /* FIXME - assign unlink_cb for filter's recovery */
+ ctxt = llog_get_context(obd, LLOG_UNLINK_REPL_CTXT);
+ ctxt->llog_proc_cb = filter_recov_log_unlink_cb;
+
+ rc = llog_setup(obd, LLOG_SIZE_ORIG_CTXT, tgt, 0, NULL,
+ &filter_size_orig_logops);
+ RETURN(rc);
}
-int filter_attach(struct obd_device *dev,
- obd_count len, void *data)
+
+static int filter_llog_finish(struct obd_device *obd, int count)
{
- return lprocfs_reg_obd(dev, status_var_nm_1, dev);
+ int rc;
+ ENTRY;
+
+ rc = llog_cleanup(llog_get_context(obd, LLOG_UNLINK_REPL_CTXT));
+ if (rc)
+ RETURN(rc);
+
+ rc = llog_cleanup(llog_get_context(obd, LLOG_SIZE_ORIG_CTXT));
+ RETURN(rc);
}
-int filter_detach(struct obd_device *dev)
+static struct dentry *filter_lvfs_fid2dentry(__u64 id, __u32 gen, __u64 gr,
+ void *data)
{
- return lprocfs_dereg_obd(dev);
+ return filter_fid2dentry(data, NULL, gr, id);
}
+
+static struct lvfs_callback_ops filter_lvfs_ops = {
+ l_fid2dentry: filter_lvfs_fid2dentry,
+};
+
static struct obd_ops filter_obd_ops = {
- o_attach: filter_attach,
- o_detach: filter_detach,
- o_get_info: filter_get_info,
- o_setup: filter_setup,
- o_cleanup: filter_cleanup,
- o_connect: filter_connect,
- o_disconnect: filter_disconnect,
- o_statfs: filter_statfs,
- o_getattr: filter_getattr,
- o_create: filter_create,
- o_setattr: filter_setattr,
- o_destroy: filter_destroy,
- o_open: filter_open,
- o_close: filter_close,
- o_brw: filter_pgcache_brw,
- o_punch: filter_truncate,
- o_preprw: filter_preprw,
- o_commitrw: filter_commitrw
-#if 0
- o_preallocate: filter_preallocate_inodes,
- o_migrate: filter_migrate,
- o_copy: filter_copy_data,
- o_iterate: filter_iterate
-#endif
+ o_owner: THIS_MODULE,
+ o_attach: filter_attach,
+ o_detach: filter_detach,
+ o_get_info: filter_get_info,
+ o_set_info: filter_set_info,
+ o_setup: filter_setup,
+ o_precleanup: filter_precleanup,
+ o_cleanup: filter_cleanup,
+ o_connect: filter_connect,
+ o_disconnect: filter_disconnect,
+ 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_brw: filter_brw,
+ o_punch: filter_truncate,
+ o_sync: filter_sync,
+ o_preprw: filter_preprw,
+ o_commitrw: filter_commitrw,
+ o_destroy_export: filter_destroy_export,
+ o_llog_init: filter_llog_init,
+ o_llog_finish: filter_llog_finish,
+ o_iocontrol: filter_iocontrol,
};
+static struct obd_ops filter_sanobd_ops = {
+ o_owner: THIS_MODULE,
+ o_attach: filter_attach,
+ o_detach: filter_detach,
+ o_get_info: filter_get_info,
+ o_set_info: filter_set_info,
+ o_setup: filter_san_setup,
+ o_precleanup: filter_precleanup,
+ o_cleanup: filter_cleanup,
+ o_connect: filter_connect,
+ o_disconnect: filter_disconnect,
+ 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_brw: filter_brw,
+ o_punch: filter_truncate,
+ o_sync: filter_sync,
+ o_preprw: filter_preprw,
+ o_commitrw: filter_commitrw,
+ o_san_preprw: filter_san_preprw,
+ o_destroy_export: filter_destroy_export,
+ o_llog_init: filter_llog_init,
+ o_llog_finish: filter_llog_finish,
+ o_iocontrol: filter_iocontrol,
+};
static int __init obdfilter_init(void)
{
- printk(KERN_INFO "Filtering OBD driver v0.001, info@clusterfs.com\n");
- filter_open_cache = kmem_cache_create("ll_filter_fdata",
- sizeof(struct filter_file_data),
- 0, 0, NULL, NULL);
- if (!filter_open_cache)
- RETURN(-ENOMEM);
+ struct lprocfs_static_vars lvars;
+ int rc;
- filter_dentry_cache = kmem_cache_create("ll_filter_dentry",
- sizeof(struct filter_dentry_data),
- 0, 0, NULL, NULL);
- if (!filter_dentry_cache) {
- kmem_cache_destroy(filter_open_cache);
- RETURN(-ENOMEM);
- }
+ printk(KERN_INFO "Lustre: Filtering OBD driver; info@clusterfs.com\n");
+
+ lprocfs_init_vars(filter, &lvars);
- return class_register_type(&filter_obd_ops, status_class_var,
- OBD_FILTER_DEVICENAME);
+ rc = class_register_type(&filter_obd_ops, lvars.module_vars,
+ OBD_FILTER_DEVICENAME);
+ if (rc)
+ return rc;
+
+ rc = class_register_type(&filter_sanobd_ops, lvars.module_vars,
+ OBD_FILTER_SAN_DEVICENAME);
+ if (rc)
+ class_unregister_type(OBD_FILTER_DEVICENAME);
+ return rc;
}
static void __exit obdfilter_exit(void)
{
+ class_unregister_type(OBD_FILTER_SAN_DEVICENAME);
class_unregister_type(OBD_FILTER_DEVICENAME);
- if (kmem_cache_destroy(filter_dentry_cache))
- CERROR("couldn't free obdfilter dentry cache\n");
- if (kmem_cache_destroy(filter_open_cache))
- CERROR("couldn't free obdfilter open cache\n");
}
MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
-MODULE_DESCRIPTION("Lustre Filtering OBD driver v1.0");
+MODULE_DESCRIPTION("Lustre Filtering OBD driver");
MODULE_LICENSE("GPL");
module_init(obdfilter_init);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff