/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * linux/mds/mds_fs.c
- *
+ * mds/mds_fs.c
* Lustre Metadata Server (MDS) filesystem interface code
*
- * Copyright (C) 2002 Cluster File Systems, Inc.
+ * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
+ * Author: Andreas Dilger <adilger@clusterfs.com>
+ *
+ * This file is part of Lustre, http://www.lustre.org.
*
- * This code is issued under the GNU General Public License.
- * See the file COPYING in this distribution
+ * 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.
*
- * by Andreas Dilger <adilger@clusterfs.com>
+ * Lustre is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
*
+ * You should have received a copy of the GNU General Public License
+ * along with Lustre; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#define EXPORT_SYMTAB
+#ifndef EXPORT_SYMTAB
+# define EXPORT_SYMTAB
+#endif
#define DEBUG_SUBSYSTEM S_MDS
#include <linux/module.h>
#include <linux/kmod.h>
+#include <linux/version.h>
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
+#include <linux/mount.h>
+#endif
#include <linux/lustre_mds.h>
#include <linux/obd_class.h>
#include <linux/obd_support.h>
#include <linux/lustre_lib.h>
+#include <linux/lustre_fsfilt.h>
+#include <portals/list.h>
-LIST_HEAD(mds_fs_types);
-
-struct mds_fs_type {
- struct list_head mft_list;
- struct mds_fs_operations *mft_ops;
- char *mft_name;
-};
+#include <linux/lustre_smfs.h>
+#include "mds_internal.h"
-#define MDS_MAX_CLIENTS 1024
+/* This limit is arbitrary, but for now we fit it in 1 page (32k clients) */
+#define MDS_MAX_CLIENTS (PAGE_SIZE * 8)
#define MDS_MAX_CLIENT_WORDS (MDS_MAX_CLIENTS / sizeof(unsigned long))
-static unsigned long last_rcvd_slots[MDS_MAX_CLIENT_WORDS];
+#define LAST_RCVD "last_rcvd"
+#define LOV_OBJID "lov_objid"
/* Add client data to the MDS. We use a bitmap to locate a free space
* in the last_rcvd file if cl_off is -1 (i.e. a new client).
* Otherwise, we have just read the data from the last_rcvd file and
* we know its offset.
*/
-int mds_client_add(struct mds_export_data *med, int cl_off)
+int mds_client_add(struct obd_device *obd, struct mds_obd *mds,
+ struct mds_export_data *med, int cl_idx)
{
- if (cl_off == -1) {
- unsigned long *word;
- int bit, bits_per_word = sizeof(*word) * 8;
+ unsigned long *bitmap = mds->mds_client_bitmap;
+ int new_client = (cl_idx == -1);
+ ENTRY;
+
+ LASSERT(bitmap != NULL);
+ /* XXX if mcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
+ if (!strcmp(med->med_mcd->mcd_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, MDS_MAX_CLIENTS);
repeat:
- word = last_rcvd_slots;
- while(*word == ~0UL)
- ++word;
- if (word - last_rcvd_slots >= MDS_MAX_CLIENT_WORDS) {
+ if (cl_idx >= MDS_MAX_CLIENTS) {
CERROR("no room for clients - fix MDS_MAX_CLIENTS\n");
return -ENOMEM;
}
- bit = ffz(*word);
- if (test_and_set_bit(bit, word)) {
- CERROR("found bit %d set for word %d - fix locking\n",
- bit, word - last_rcvd_slots);
- LBUG();
+ if (test_and_set_bit(cl_idx, bitmap)) {
+ cl_idx = find_next_zero_bit(bitmap, MDS_MAX_CLIENTS,
+ cl_idx);
goto repeat;
}
- cl_off = (word - last_rcvd_slots) * bits_per_word + bit;
} else {
- /* test_and_set_bit can handle cl_off > sizeof(long), so there's
- * no need to frob it */
- if (test_and_set_bit(cl_off, last_rcvd_slots)) {
- CERROR("bit %d already set in bitmap - bad bad\n",
- cl_off);
+ if (test_and_set_bit(cl_idx, bitmap)) {
+ CERROR("MDS client %d: bit already set in bitmap!!\n",
+ cl_idx);
LBUG();
}
}
- CDEBUG(D_INFO, "client at offset %d with UUID '%s' added\n",
- cl_off, med->med_mcd->mcd_uuid);
+ CDEBUG(D_INFO, "client at idx %d with UUID '%s' added\n",
+ cl_idx, med->med_mcd->mcd_uuid);
- med->med_off = cl_off;
+ med->med_idx = cl_idx;
+ med->med_off = le32_to_cpu(mds->mds_server_data->msd_client_start) +
+ (cl_idx * le16_to_cpu(mds->mds_server_data->msd_client_size));
+
+ if (new_client) {
+ struct lvfs_run_ctxt saved;
+ loff_t off = med->med_off;
+ struct file *file = mds->mds_rcvd_filp;
+ int rc;
+
+ push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+ rc = fsfilt_write_record(obd, file, med->med_mcd,
+ sizeof(*med->med_mcd), &off, 1);
+ pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+
+ if (rc)
+ return rc;
+ CDEBUG(D_INFO, "wrote client mcd at idx %u off %llu (len %u)\n",
+ med->med_idx, med->med_off,
+ (unsigned int)sizeof(*med->med_mcd));
+ }
return 0;
}
-int mds_client_free(struct obd_export *exp)
+int mds_client_free(struct obd_export *exp, int clear_client)
{
struct mds_export_data *med = &exp->exp_mds_data;
- unsigned long *word;
- int bit, bits_per_word = sizeof(*word) * 8;
+ struct mds_obd *mds = &exp->exp_obd->u.mds;
+ struct obd_device *obd = exp->exp_obd;
+ struct mds_client_data zero_mcd;
+ struct lvfs_run_ctxt saved;
+ int rc;
+ unsigned long *bitmap = mds->mds_client_bitmap;
if (!med->med_mcd)
RETURN(0);
- CDEBUG(D_INFO, "freeing client at offset %d with UUID '%s'\n",
- med->med_off, med->med_mcd->mcd_uuid);
+ /* XXX if mcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
+ if (!strcmp(med->med_mcd->mcd_uuid, obd->obd_uuid.uuid))
+ GOTO(free_and_out, 0);
+
+ CDEBUG(D_INFO, "freeing client at idx %u (%lld)with UUID '%s'\n",
+ med->med_idx, med->med_off, med->med_mcd->mcd_uuid);
- word = last_rcvd_slots + med->med_off / bits_per_word;
- bit = med->med_off % bits_per_word;
+ LASSERT(bitmap);
- if (!test_and_clear_bit(bit, word)) {
- CERROR("bit %d already clear in word %d - bad bad\n",
- bit, word - last_rcvd_slots);
+ /* Clear the bit _after_ zeroing out the client so we don't
+ race with mds_client_add and zero out new clients.*/
+ if (!test_bit(med->med_idx, bitmap)) {
+ CERROR("MDS client %u: bit already clear in bitmap!!\n",
+ med->med_idx);
LBUG();
}
+ if (clear_client) {
+ memset(&zero_mcd, 0, sizeof zero_mcd);
+ push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+ rc = fsfilt_write_record(obd, mds->mds_rcvd_filp, &zero_mcd,
+ sizeof(zero_mcd), &med->med_off, 1);
+ pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+
+ CDEBUG(rc == 0 ? D_INFO : D_ERROR,
+ "zeroing out client %s idx %u in %s rc %d\n",
+ med->med_mcd->mcd_uuid, med->med_idx, LAST_RCVD, rc);
+ }
+
+ if (!test_and_clear_bit(med->med_idx, bitmap)) {
+ CERROR("MDS client %u: bit already clear in bitmap!!\n",
+ med->med_idx);
+ LBUG();
+ }
+
+
+ /* Make sure the server's last_transno is up to date. Do this
+ * after the client is freed so we know all the client's
+ * transactions have been committed. */
+ mds_update_server_data(exp->exp_obd, 1);
+
+ free_and_out:
OBD_FREE(med->med_mcd, sizeof(*med->med_mcd));
return 0;
static int mds_server_free_data(struct mds_obd *mds)
{
+ OBD_FREE(mds->mds_client_bitmap,
+ MDS_MAX_CLIENT_WORDS * sizeof(unsigned long));
OBD_FREE(mds->mds_server_data, sizeof(*mds->mds_server_data));
mds->mds_server_data = NULL;
return 0;
}
-#define LAST_RCVD "last_rcvd"
-
-static int mds_read_last_rcvd(struct obd_device *obddev, struct file *f)
+static int mds_read_last_rcvd(struct obd_device *obd, struct file *file)
{
- struct mds_obd *mds = &obddev->u.mds;
+ struct mds_obd *mds = &obd->u.mds;
struct mds_server_data *msd;
struct mds_client_data *mcd = NULL;
- loff_t fsize = f->f_dentry->d_inode->i_size;
loff_t off = 0;
- int cl_off;
- __u64 last_rcvd = 0;
- __u64 last_mount;
- int clients = 0;
- int rc = 0;
-
- OBD_ALLOC(msd, sizeof(*msd));
+ unsigned long last_rcvd_size = file->f_dentry->d_inode->i_size;
+ __u64 mount_count;
+ int cl_idx, rc = 0;
+ ENTRY;
+
+ /* ensure padding in the struct is the correct size */
+ LASSERT(offsetof(struct mds_server_data, msd_padding) +
+ sizeof(msd->msd_padding) == MDS_LR_SERVER_SIZE);
+ LASSERT(offsetof(struct mds_client_data, mcd_padding) +
+ sizeof(mcd->mcd_padding) == MDS_LR_CLIENT_SIZE);
+
+ OBD_ALLOC_WAIT(msd, sizeof(*msd));
if (!msd)
RETURN(-ENOMEM);
- rc = lustre_fread(f, (char *)msd, sizeof(*msd), &off);
- mds->mds_server_data = msd;
- if (rc == 0) {
- CERROR("empty MDS %s, new MDS?\n", LAST_RCVD);
- RETURN(0);
+ OBD_ALLOC_WAIT(mds->mds_client_bitmap,
+ MDS_MAX_CLIENT_WORDS * sizeof(unsigned long));
+ if (!mds->mds_client_bitmap) {
+ OBD_FREE(msd, sizeof(*msd));
+ RETURN(-ENOMEM);
}
- if (rc != sizeof(*msd)) {
- CERROR("error reading MDS %s: rc = %d\n", LAST_RCVD, rc);
- if (rc > 0) {
- rc = -EIO;
+ mds->mds_server_data = msd;
+
+ if (last_rcvd_size == 0) {
+ CWARN("%s: initializing new %s\n", obd->obd_name, LAST_RCVD);
+
+ memcpy(msd->msd_uuid, obd->obd_uuid.uuid,sizeof(msd->msd_uuid));
+ msd->msd_last_transno = 0;
+ mount_count = msd->msd_mount_count = 0;
+ msd->msd_server_size = cpu_to_le32(MDS_LR_SERVER_SIZE);
+ msd->msd_client_start = cpu_to_le32(MDS_LR_CLIENT_START);
+ msd->msd_client_size = cpu_to_le16(MDS_LR_CLIENT_SIZE);
+ msd->msd_feature_rocompat = cpu_to_le32(MDS_ROCOMPAT_LOVOBJID);
+ } else {
+ rc = fsfilt_read_record(obd, file, msd, sizeof(*msd), &off);
+ if (rc) {
+ CERROR("error reading MDS %s: rc = %d\n", LAST_RCVD, rc);
+ GOTO(err_msd, rc);
+ }
+ if (strcmp(msd->msd_uuid, obd->obd_uuid.uuid) != 0) {
+ CERROR("OBD UUID %s does not match last_rcvd UUID %s\n",
+ obd->obd_uuid.uuid, msd->msd_uuid);
+ GOTO(err_msd, rc = -EINVAL);
}
- GOTO(err_msd, rc);
+ mount_count = le64_to_cpu(msd->msd_mount_count);
+ }
+ if (msd->msd_feature_incompat & ~cpu_to_le32(MDS_INCOMPAT_SUPP)) {
+ CERROR("unsupported incompat feature %x\n",
+ le32_to_cpu(msd->msd_feature_incompat) &
+ ~MDS_INCOMPAT_SUPP);
+ GOTO(err_msd, rc = -EINVAL);
+ }
+ /* XXX updating existing b_devel fs only, can be removed in future */
+ msd->msd_feature_rocompat = cpu_to_le32(MDS_ROCOMPAT_LOVOBJID);
+ if (msd->msd_feature_rocompat & ~cpu_to_le32(MDS_ROCOMPAT_SUPP)) {
+ CERROR("unsupported read-only feature %x\n",
+ le32_to_cpu(msd->msd_feature_rocompat) &
+ ~MDS_ROCOMPAT_SUPP);
+ /* Do something like remount filesystem read-only */
+ GOTO(err_msd, rc = -EINVAL);
}
- /*
- * When we do a clean MDS shutdown, we save the last_rcvd into
- * the header. If we find clients with higher last_rcvd values
- * then those clients may need recovery done.
- */
- last_rcvd = le64_to_cpu(msd->msd_last_rcvd);
- mds->mds_last_rcvd = last_rcvd;
- CDEBUG(D_INODE, "got %Lu for server last_rcvd value\n",
- (unsigned long long)last_rcvd);
-
- last_mount = le64_to_cpu(msd->msd_mount_count);
- mds->mds_mount_count = last_mount;
- CDEBUG(D_INODE, "got %Lu for server last_mount value\n",
- (unsigned long long)last_mount);
-
- for (off = MDS_LR_CLIENT, cl_off = 0, rc = sizeof(*mcd);
- off <= fsize - sizeof(*mcd) && rc == sizeof(*mcd);
- off = MDS_LR_CLIENT + ++cl_off * MDS_LR_SIZE) {
+ mds->mds_last_transno = le64_to_cpu(msd->msd_last_transno);
+
+ CDEBUG(D_INODE, "%s: server last_transno: "LPU64"\n",
+ obd->obd_name, mds->mds_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(msd->msd_server_size));
+ CDEBUG(D_INODE, "%s: per-client data start: %u\n",
+ obd->obd_name, le32_to_cpu(msd->msd_client_start));
+ CDEBUG(D_INODE, "%s: per-client data size: %u\n",
+ obd->obd_name, le32_to_cpu(msd->msd_client_size));
+ CDEBUG(D_INODE, "%s: last_rcvd size: %lu\n",
+ obd->obd_name, last_rcvd_size);
+ CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name,
+ last_rcvd_size <= le32_to_cpu(msd->msd_client_start) ? 0 :
+ (last_rcvd_size - le32_to_cpu(msd->msd_client_start)) /
+ le16_to_cpu(msd->msd_client_size));
+
+ /* When we do a clean MDS shutdown, we save the last_transno into
+ * the header. If we find clients with higher last_transno values
+ * then those clients may need recovery done. */
+ for (cl_idx = 0, off = le32_to_cpu(msd->msd_client_start);
+ off < last_rcvd_size; cl_idx++) {
+ __u64 last_transno;
+ struct obd_export *exp;
+ struct mds_export_data *med;
+
if (!mcd) {
- OBD_ALLOC(mcd, sizeof(*mcd));
+ OBD_ALLOC_WAIT(mcd, sizeof(*mcd));
if (!mcd)
- GOTO(err_msd, rc = -ENOMEM);
+ GOTO(err_client, rc = -ENOMEM);
}
- rc = lustre_fread(f, (char *)mcd, sizeof(*mcd), &off);
- if (rc != sizeof(*mcd)) {
- CERROR("error reading MDS %s offset %d: rc = %d\n",
- LAST_RCVD, cl_off, rc);
- if (rc > 0)
- rc = -EIO;
- break;
+ /* Don't assume off is incremented properly by
+ * fsfilt_read_record(), in case sizeof(*mcd)
+ * isn't the same as msd->msd_client_size. */
+ off = le32_to_cpu(msd->msd_client_start) +
+ cl_idx * le16_to_cpu(msd->msd_client_size);
+ rc = fsfilt_read_record(obd, file, mcd, sizeof(*mcd), &off);
+ if (rc) {
+ CERROR("error reading MDS %s idx %d, off %llu: rc %d\n",
+ LAST_RCVD, cl_idx, off, rc);
+ break; /* read error shouldn't cause startup to fail */
}
- last_rcvd = le64_to_cpu(mcd->mcd_last_rcvd);
-
- /* Do client recovery here (open files, etc) */
- if (last_rcvd && (last_mount - le64_to_cpu(mcd->mcd_mount_count)
- < MDS_MOUNT_RECOV)) {
- struct obd_export *export = class_new_export(obddev);
- if (!export) {
- rc = -ENOMEM;
- break;
- }
- export->exp_mds_data.med_mcd = mcd;
- mds_client_add(&export->exp_mds_data, cl_off);
- mcd = NULL;
- clients++;
- } else {
- CDEBUG(D_INFO,
- "ignored client %d, UUID '%s', last_mount %Ld\n",
- cl_off, mcd->mcd_uuid,
- (long long)le64_to_cpu(mcd->mcd_mount_count));
+ if (mcd->mcd_uuid[0] == '\0') {
+ CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
+ cl_idx);
+ continue;
}
- if (last_rcvd > mds->mds_last_rcvd) {
- CDEBUG(D_OTHER,
- "client at offset %d has last_rcvd = %Lu\n",
- cl_off, (unsigned long long)last_rcvd);
- mds->mds_last_rcvd = last_rcvd;
- }
+ last_transno = le64_to_cpu(mcd->mcd_last_transno);
+
+ /* These exports are cleaned up by mds_disconnect(), so they
+ * need to be set up like real exports as mds_connect() does.
+ */
+ CDEBUG(D_HA|D_WARNING,"RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
+ " srv lr: "LPU64" lx: "LPU64"\n", mcd->mcd_uuid, cl_idx,
+ last_transno, le64_to_cpu(msd->msd_last_transno),
+ mcd->mcd_last_xid);
+
+ exp = class_new_export(obd);
+ if (exp == NULL)
+ GOTO(err_client, rc = -ENOMEM);
+
+ memcpy(&exp->exp_client_uuid.uuid, mcd->mcd_uuid,
+ sizeof exp->exp_client_uuid.uuid);
+ med = &exp->exp_mds_data;
+ med->med_mcd = mcd;
+ mds_client_add(obd, mds, med, cl_idx);
+ /* create helper if export init gets more complex */
+ INIT_LIST_HEAD(&med->med_open_head);
+ spin_lock_init(&med->med_open_lock);
+
+ mcd = NULL;
+ exp->exp_replay_needed = 1;
+ obd->obd_recoverable_clients++;
+ obd->obd_max_recoverable_clients++;
+ class_export_put(exp);
+
+ CDEBUG(D_OTHER, "client at idx %d has last_transno = "LPU64"\n",
+ cl_idx, last_transno);
+
+ if (last_transno > mds->mds_last_transno)
+ mds->mds_last_transno = last_transno;
+ }
+
+ obd->obd_last_committed = mds->mds_last_transno;
+ if (obd->obd_recoverable_clients) {
+ CWARN("RECOVERY: service %s, %d recoverable clients, "
+ "last_transno "LPU64"\n", obd->obd_name,
+ obd->obd_recoverable_clients, mds->mds_last_transno);
+ obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
+ target_start_recovery_thread(obd, mds_handle);
}
- CDEBUG(D_INODE, "got %Lu for highest last_rcvd value, %d/%d clients\n",
- (unsigned long long)mds->mds_last_rcvd, clients, cl_off);
if (mcd)
OBD_FREE(mcd, sizeof(*mcd));
+
+ mds->mds_mount_count = mount_count + 1;
+ msd->msd_mount_count = cpu_to_le64(mds->mds_mount_count);
- /* After recovery, there can be no local uncommitted transactions */
- mds->mds_last_committed = mds->mds_last_rcvd;
+ /* save it, so mount count and last_transno is current */
+ rc = mds_update_server_data(obd, 1);
- return 0;
+ RETURN(rc);
+err_client:
+ class_disconnect_exports(obd, 0);
err_msd:
mds_server_free_data(mds);
- return rc;
+ RETURN(rc);
}
-static int mds_fs_prep(struct obd_device *obddev)
+static int mds_fs_post_setup(struct obd_device *obd)
{
- struct mds_obd *mds = &obddev->u.mds;
- struct obd_run_ctxt saved;
+ struct mds_obd *mds = &obd->u.mds;
+ struct dentry *de = mds_fid2dentry(mds, &mds->mds_rootfid, NULL);
+ int rc = 0;
+
+ rc = fsfilt_post_setup(obd, de);
+ if (rc)
+ GOTO(out, rc);
+
+ fsfilt_set_fs_flags(obd, de->d_inode,
+ SM_DO_REC | SM_DO_COW);
+ fsfilt_set_fs_flags(obd, mds->mds_pending_dir->d_inode,
+ SM_DO_REC | SM_DO_COW);
+ fsfilt_set_mds_flags(obd, mds->mds_sb);
+out:
+ l_dput(de);
+ return rc;
+}
+
+int mds_fs_setup(struct obd_device *obd, struct vfsmount *mnt)
+{
+ struct mds_obd *mds = &obd->u.mds;
+ struct lvfs_run_ctxt saved;
struct dentry *dentry;
- struct file *f;
+ struct file *file;
int rc;
+ ENTRY;
- push_ctxt(&saved, &mds->mds_ctxt);
- dentry = simple_mkdir(current->fs->pwd, "ROOT", 0755);
+ rc = cleanup_group_info();
+ if (rc)
+ RETURN(rc);
+
+ mds->mds_vfsmnt = mnt;
+ mds->mds_sb = mnt->mnt_root->d_inode->i_sb;
+
+ fsfilt_setup(obd, mds->mds_sb);
+
+ OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
+ obd->obd_lvfs_ctxt.pwdmnt = mnt;
+ obd->obd_lvfs_ctxt.pwd = mnt->mnt_root;
+ obd->obd_lvfs_ctxt.fs = get_ds();
+ obd->obd_lvfs_ctxt.cb_ops = mds_lvfs_ops;
+
+ /* setup the directory tree */
+ push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+ dentry = simple_mkdir(current->fs->pwd, "ROOT", 0755, 0);
if (IS_ERR(dentry)) {
rc = PTR_ERR(dentry);
CERROR("cannot create ROOT directory: rc = %d\n", rc);
dput(dentry);
- dentry = simple_mkdir(current->fs->pwd, "FH", 0700);
+ dentry = lookup_one_len("__iopen__", current->fs->pwd,
+ strlen("__iopen__"));
if (IS_ERR(dentry)) {
rc = PTR_ERR(dentry);
- CERROR("cannot create FH directory: rc = %d\n", rc);
+ CERROR("cannot lookup __iopen__ directory: rc = %d\n", rc);
GOTO(err_pop, rc);
}
- /* XXX probably want to hold on to this later... */
- dput(dentry);
+ if (!dentry->d_inode) {
+ rc = -ENOENT;
+ CERROR("__iopen__ directory has no inode? rc = %d\n", rc);
+ GOTO(err_fid, rc);
+ }
+ mds->mds_fid_de = dentry;
+
+ dentry = simple_mkdir(current->fs->pwd, "PENDING", 0777, 1);
+ if (IS_ERR(dentry)) {
+ rc = PTR_ERR(dentry);
+ CERROR("cannot create PENDING directory: rc = %d\n", rc);
+ GOTO(err_fid, rc);
+ }
+ mds->mds_pending_dir = dentry;
+
+ dentry = simple_mkdir(current->fs->pwd, "LOGS", 0777, 1);
+ if (IS_ERR(dentry)) {
+ rc = PTR_ERR(dentry);
+ CERROR("cannot create LOGS directory: rc = %d\n", rc);
+ GOTO(err_pending, rc);
+ }
+ mds->mds_logs_dir = dentry;
- f = filp_open(LAST_RCVD, O_RDWR | O_CREAT, 0644);
- if (IS_ERR(f)) {
- rc = PTR_ERR(f);
+ dentry = simple_mkdir(current->fs->pwd, "OBJECTS", 0777, 1);
+ if (IS_ERR(dentry)) {
+ rc = PTR_ERR(dentry);
+ CERROR("cannot create OBJECTS directory: rc = %d\n", rc);
+ GOTO(err_logs, rc);
+ }
+ mds->mds_objects_dir = dentry;
+
+ dentry = simple_mkdir(current->fs->pwd, "FIDS", 0777, 1);
+ if (IS_ERR(dentry)) {
+ rc = PTR_ERR(dentry);
+ CERROR("cannot create FIDS directory: rc = %d\n", rc);
+ GOTO(err_fids, rc);
+ }
+ mds->mds_fids_dir = dentry;
+
+ dentry = simple_mkdir(current->fs->pwd, "UNNAMED", 0777, 1);
+ if (IS_ERR(dentry)) {
+ rc = PTR_ERR(dentry);
+ CERROR("cannot create UNNAMED directory: rc = %d\n", rc);
+ GOTO(err_unnamed, rc);
+ }
+ mds->mds_unnamed_dir = dentry;
+
+ /* open and test the last rcvd file */
+ file = filp_open(LAST_RCVD, O_RDWR | O_CREAT, 0644);
+ if (IS_ERR(file)) {
+ rc = PTR_ERR(file);
CERROR("cannot open/create %s file: rc = %d\n", LAST_RCVD, rc);
- GOTO(err_pop, rc = PTR_ERR(f));
+ GOTO(err_objects, rc = PTR_ERR(file));
}
- if (!S_ISREG(f->f_dentry->d_inode->i_mode)) {
+ mds->mds_rcvd_filp = file;
+ if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
CERROR("%s is not a regular file!: mode = %o\n", LAST_RCVD,
- f->f_dentry->d_inode->i_mode);
- GOTO(err_pop, rc = -ENOENT);
+ file->f_dentry->d_inode->i_mode);
+ GOTO(err_last_rcvd, rc = -ENOENT);
}
- rc = mds_fs_journal_data(mds, f);
+ rc = mds_read_last_rcvd(obd, file);
if (rc) {
- CERROR("cannot journal data on %s: rc = %d\n", LAST_RCVD, rc);
- GOTO(err_filp, rc);
+ CERROR("cannot read %s: rc = %d\n", LAST_RCVD, rc);
+ GOTO(err_last_rcvd, rc);
}
- rc = mds_read_last_rcvd(obddev, f);
- if (rc) {
- CERROR("cannot read %s: rc = %d\n", LAST_RCVD, rc);
- GOTO(err_client, rc);
+ /* open and test the lov objd file */
+ file = filp_open(LOV_OBJID, O_RDWR | O_CREAT, 0644);
+ if (IS_ERR(file)) {
+ rc = PTR_ERR(file);
+ CERROR("cannot open/create %s file: rc = %d\n", LOV_OBJID, rc);
+ GOTO(err_client, rc = PTR_ERR(file));
+ }
+ mds->mds_lov_objid_filp = file;
+ if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
+ CERROR("%s is not a regular file!: mode = %o\n", LOV_OBJID,
+ file->f_dentry->d_inode->i_mode);
+ GOTO(err_lov_objid, rc = -ENOENT);
}
- mds->mds_rcvd_filp = f;
err_pop:
- pop_ctxt(&saved);
-
+ if (!rc) {
+ rc = mds_fs_post_setup(obd);
+ if (rc)
+ CERROR("can not post setup fsfilt\n");
+ }
+ pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
return rc;
+err_lov_objid:
+ if (mds->mds_lov_objid_filp && filp_close(mds->mds_lov_objid_filp, 0))
+ CERROR("can't close %s after error\n", LOV_OBJID);
err_client:
- class_disconnect_all(obddev);
-err_filp:
- if (filp_close(f, 0))
+ class_disconnect_exports(obd, 0);
+err_last_rcvd:
+ if (mds->mds_rcvd_filp && filp_close(mds->mds_rcvd_filp, 0))
CERROR("can't close %s after error\n", LAST_RCVD);
+err_unnamed:
+ dput(mds->mds_unnamed_dir);
+err_fids:
+ dput(mds->mds_fids_dir);
+err_objects:
+ dput(mds->mds_objects_dir);
+err_logs:
+ dput(mds->mds_logs_dir);
+err_pending:
+ dput(mds->mds_pending_dir);
+err_fid:
+ dput(mds->mds_fid_de);
goto err_pop;
}
-static struct mds_fs_operations *mds_search_fs_type(const char *name)
+static int mds_fs_post_cleanup(struct obd_device *obd)
{
- struct list_head *p;
- struct mds_fs_type *type;
-
- /* lock mds_fs_types list */
- list_for_each(p, &mds_fs_types) {
- type = list_entry(p, struct mds_fs_type, mft_list);
- if (!strcmp(type->mft_name, name)) {
- /* unlock mds_fs_types list */
- return type->mft_ops;
- }
- }
- /* unlock mds_fs_types list */
- return NULL;
+ int rc = 0;
+ rc = fsfilt_post_cleanup(obd);
+ return rc;
}
-int mds_register_fs_type(struct mds_fs_operations *ops, const char *name)
+int mds_fs_cleanup(struct obd_device *obd, int flags)
{
- struct mds_fs_operations *found;
- struct mds_fs_type *type;
+ struct mds_obd *mds = &obd->u.mds;
+ struct lvfs_run_ctxt saved;
+ int rc = 0;
- if ((found = mds_search_fs_type(name))) {
- if (found != ops) {
- CERROR("different operations for type %s\n", name);
- RETURN(-EEXIST);
- }
- return 0;
- }
- OBD_ALLOC(type, sizeof(*type));
- if (!type)
- RETURN(-ENOMEM);
+ if (flags & OBD_OPT_FAILOVER)
+ CERROR("%s: shutting down for failover; client state will"
+ " be preserved.\n", obd->obd_name);
- INIT_LIST_HEAD(&type->mft_list);
- type->mft_ops = ops;
- type->mft_name = strdup(name);
- if (!type->mft_name) {
- OBD_FREE(type, sizeof(*type));
- RETURN(-ENOMEM);
+ class_disconnect_exports(obd, flags); /* cleans up client info too */
+ mds_server_free_data(mds);
+
+ push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+ if (mds->mds_rcvd_filp) {
+ rc = filp_close(mds->mds_rcvd_filp, 0);
+ mds->mds_rcvd_filp = NULL;
+ if (rc)
+ CERROR("%s file won't close, rc=%d\n", LAST_RCVD, rc);
}
- MOD_INC_USE_COUNT;
- list_add(&type->mft_list, &mds_fs_types);
+ if (mds->mds_lov_objid_filp) {
+ rc = filp_close(mds->mds_lov_objid_filp, 0);
+ mds->mds_lov_objid_filp = NULL;
+ if (rc)
+ CERROR("%s file won't close, rc=%d\n", LOV_OBJID, rc);
+ }
+ if (mds->mds_unnamed_dir != NULL) {
+ l_dput(mds->mds_unnamed_dir);
+ mds->mds_unnamed_dir = NULL;
+ }
+ if (mds->mds_fids_dir != NULL) {
+ l_dput(mds->mds_fids_dir);
+ mds->mds_fids_dir = NULL;
+ }
+ if (mds->mds_objects_dir != NULL) {
+ l_dput(mds->mds_objects_dir);
+ mds->mds_objects_dir = NULL;
+ }
+ if (mds->mds_logs_dir) {
+ l_dput(mds->mds_logs_dir);
+ mds->mds_logs_dir = NULL;
+ }
+ if (mds->mds_pending_dir) {
+ l_dput(mds->mds_pending_dir);
+ mds->mds_pending_dir = NULL;
+ }
+ rc = mds_fs_post_cleanup(obd);
+
+ pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+ shrink_dcache_parent(mds->mds_fid_de);
+ dput(mds->mds_fid_de);
- return 0;
+ return rc;
}
-void mds_unregister_fs_type(const char *name)
+/* Creates an object with the same name as its fid. Because this is not at all
+ * performance sensitive, it is accomplished by creating a file, checking the
+ * fid, and renaming it. */
+int mds_obd_create(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md **ea, struct obd_trans_info *oti)
{
- struct list_head *p;
-
- /* lock mds_fs_types list */
- list_for_each(p, &mds_fs_types) {
- struct mds_fs_type *type;
-
- type = list_entry(p, struct mds_fs_type, mft_list);
- if (!strcmp(type->mft_name, name)) {
- list_del(p);
- kfree(type->mft_name);
- OBD_FREE(type, sizeof(*type));
- MOD_DEC_USE_COUNT;
- break;
+ struct mds_obd *mds = &exp->exp_obd->u.mds;
+ struct inode *parent_inode = mds->mds_objects_dir->d_inode;
+ struct file *filp;
+ struct dentry *dchild;
+ struct lvfs_run_ctxt saved;
+ char fidname[LL_FID_NAMELEN];
+ void *handle;
+ int rc = 0, err, namelen;
+ ENTRY;
+
+ push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
+ down(&parent_inode->i_sem);
+ if (oa->o_id) {
+ namelen = ll_fid2str(fidname, oa->o_id, oa->o_generation);
+
+ dchild = lookup_one_len(fidname, mds->mds_objects_dir, namelen);
+ if (IS_ERR(dchild))
+ GOTO(out_pop, rc = PTR_ERR(dchild));
+
+ if (dchild->d_inode == NULL) {
+ struct dentry_params dp;
+ struct inode *inode;
+
+ dchild->d_fsdata = (void *) &dp;
+ dp.p_ptr = NULL;
+ dp.p_inum = oa->o_id;
+ rc = ll_vfs_create(parent_inode, dchild, S_IFREG, NULL);
+ if (dchild->d_fsdata == (void *)(unsigned long)oa->o_id)
+ dchild->d_fsdata = NULL;
+ if (rc) {
+ CDEBUG(D_INODE, "err during create: %d\n", rc);
+ dput(dchild);
+ GOTO(out_pop, rc);
+ }
+ inode = dchild->d_inode;
+ LASSERT(inode->i_ino == oa->o_id);
+ inode->i_generation = oa->o_generation;
+ CDEBUG(D_HA, "recreated ino %lu with gen %u\n",
+ inode->i_ino, inode->i_generation);
+ mark_inode_dirty(inode);
+ } else {
+ CWARN("it should be here!\n");
}
+ GOTO(out_pop, rc);
}
- /* unlock mds_fs_types list */
-}
-
-struct mds_fs_operations *mds_fs_get_ops(char *fstype)
-{
- struct mds_fs_operations *fs_ops;
- if (!(fs_ops = mds_search_fs_type(fstype))) {
- char name[32];
- int rc;
-
- snprintf(name, sizeof(name) - 1, "mds_%s", fstype);
- name[sizeof(name) - 1] = '\0';
-
- if ((rc = request_module(name))) {
- fs_ops = mds_search_fs_type(fstype);
- CDEBUG(D_INFO, "Loaded module '%s'\n", name);
- if (!fs_ops)
- rc = -ENOENT;
- }
-
- if (rc) {
- CERROR("Can't find MDS fs interface '%s'\n", name);
- RETURN(ERR_PTR(rc));
+ sprintf(fidname, "OBJECTS/%u.%u",ll_insecure_random_int(),current->pid);
+ filp = filp_open(fidname, O_CREAT | O_EXCL, 0644);
+ if (IS_ERR(filp)) {
+ rc = PTR_ERR(filp);
+ if (rc == -EEXIST) {
+ CERROR("impossible object name collision %s\n",
+ fidname);
+ LBUG();
}
+ CERROR("error creating tmp object %s: rc %d\n", fidname, rc);
+ GOTO(out_pop, rc);
}
- __MOD_INC_USE_COUNT(fs_ops->fs_owner);
-
- return fs_ops;
-}
-
-void mds_fs_put_ops(struct mds_fs_operations *fs_ops)
-{
- __MOD_DEC_USE_COUNT(fs_ops->fs_owner);
-}
-int mds_fs_setup(struct obd_device *obddev, struct vfsmount *mnt)
-{
- struct mds_obd *mds = &obddev->u.mds;
- int rc;
+ LASSERT(mds->mds_objects_dir == filp->f_dentry->d_parent);
- mds->mds_fsops = mds_fs_get_ops(mds->mds_fstype);
- if (IS_ERR(mds->mds_fsops))
- RETURN(PTR_ERR(mds->mds_fsops));
+ oa->o_id = filp->f_dentry->d_inode->i_ino;
+ oa->o_generation = filp->f_dentry->d_inode->i_generation;
+ namelen = ll_fid2str(fidname, oa->o_id, oa->o_generation);
- mds->mds_vfsmnt = mnt;
-
- OBD_SET_CTXT_MAGIC(&mds->mds_ctxt);
- mds->mds_ctxt.pwdmnt = mnt;
- mds->mds_ctxt.pwd = mnt->mnt_root;
- mds->mds_ctxt.fs = get_ds();
-
- /*
- * Replace the client filesystem delete_inode method with our own,
- * so that we can clear the object ID before the inode is deleted.
- * The fs_delete_inode method will call cl_delete_inode for us.
- * We need to do this for the MDS superblock only, hence we install
- * a modified copy of the original superblock method table.
- *
- * We still assume that there is only a single MDS client filesystem
- * type, as we don't have access to the mds struct in delete_inode
- * and store the client delete_inode method in a global table. This
- * will only become a problem if/when multiple MDSs are running on a
- * single host with different underlying filesystems.
- */
- OBD_ALLOC(mds->mds_sop, sizeof(*mds->mds_sop));
- if (!mds->mds_sop)
- GOTO(out_dec, rc = -ENOMEM);
+ dchild = lookup_one_len(fidname, mds->mds_objects_dir, namelen);
- memcpy(mds->mds_sop, mds->mds_sb->s_op, sizeof(*mds->mds_sop));
- mds->mds_fsops->cl_delete_inode = mds->mds_sop->delete_inode;
- mds->mds_sop->delete_inode = mds->mds_fsops->fs_delete_inode;
- mds->mds_sb->s_op = mds->mds_sop;
+ if (IS_ERR(dchild)) {
+ CERROR("getting neg dentry for obj rename: %d\n", rc);
+ GOTO(out_close, rc = PTR_ERR(dchild));
+ }
+ if (dchild->d_inode != NULL) {
+ CERROR("impossible non-negative obj dentry " LPU64":%u!\n",
+ oa->o_id, oa->o_generation);
+ LBUG();
+ }
- rc = mds_fs_prep(obddev);
+ handle = fsfilt_start(exp->exp_obd, mds->mds_objects_dir->d_inode,
+ FSFILT_OP_RENAME, NULL);
+ if (IS_ERR(handle))
+ GOTO(out_dput, rc = PTR_ERR(handle));
+ lock_kernel();
+ rc = vfs_rename(mds->mds_objects_dir->d_inode, filp->f_dentry,
+ mds->mds_objects_dir->d_inode, dchild);
+ unlock_kernel();
if (rc)
- GOTO(out_free, rc);
-
- return 0;
-
-out_free:
- OBD_FREE(mds->mds_sop, sizeof(*mds->mds_sop));
-out_dec:
- mds_fs_put_ops(mds->mds_fsops);
- return rc;
+ CERROR("error renaming new object "LPU64":%u: rc %d\n",
+ oa->o_id, oa->o_generation, rc);
+
+ err = fsfilt_commit(exp->exp_obd, mds->mds_sb,
+ mds->mds_objects_dir->d_inode, handle, 0);
+ if (!err) {
+ oa->o_gr = FILTER_GROUP_FIRST_MDS + mds->mds_num;
+ oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGENER | OBD_MD_FLGROUP;
+ } else if (!rc)
+ rc = err;
+out_dput:
+ dput(dchild);
+out_close:
+ err = filp_close(filp, 0);
+ if (err) {
+ CERROR("closing tmpfile %s: rc %d\n", fidname, rc);
+ if (!rc)
+ rc = err;
+ }
+out_pop:
+ up(&parent_inode->i_sem);
+ pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
+ RETURN(rc);
}
-void mds_fs_cleanup(struct obd_device *obddev)
+int mds_obd_destroy(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *ea, struct obd_trans_info *oti)
{
- struct mds_obd *mds = &obddev->u.mds;
-
- class_disconnect_all(obddev); /* this cleans up client info too */
- mds_server_free_data(mds);
+ struct mds_obd *mds = &exp->exp_obd->u.mds;
+ struct inode *parent_inode = mds->mds_objects_dir->d_inode;
+ struct obd_device *obd = exp->exp_obd;
+ struct lvfs_run_ctxt saved;
+ char fidname[LL_FID_NAMELEN];
+ struct dentry *de;
+ void *handle;
+ int err, namelen, rc = 0;
+ ENTRY;
+
+ push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+
+ namelen = ll_fid2str(fidname, oa->o_id, oa->o_generation);
+
+ down(&parent_inode->i_sem);
+ de = lookup_one_len(fidname, mds->mds_objects_dir, namelen);
+ if (de == NULL || de->d_inode == NULL) {
+ CERROR("destroying non-existent object "LPU64" %s\n",
+ oa->o_id, fidname);
+ GOTO(out_dput, rc = IS_ERR(de) ? PTR_ERR(de) : -ENOENT);
+ }
- OBD_FREE(mds->mds_sop, sizeof(*mds->mds_sop));
- mds_fs_put_ops(mds->mds_fsops);
+ /* Stripe count is 1 here since this is some MDS specific stuff
+ that is unlinked, not spanned across multiple OSTs */
+ handle = fsfilt_start_log(obd, mds->mds_objects_dir->d_inode,
+ FSFILT_OP_UNLINK, oti, 1);
+
+ if (IS_ERR(handle))
+ GOTO(out_dput, rc = PTR_ERR(handle));
+
+ rc = vfs_unlink(mds->mds_objects_dir->d_inode, de);
+ if (rc)
+ CERROR("error destroying object "LPU64":%u: rc %d\n",
+ oa->o_id, oa->o_generation, rc);
+
+ err = fsfilt_commit(obd, mds->mds_sb, mds->mds_objects_dir->d_inode,
+ handle, 0);
+ if (err && !rc)
+ rc = err;
+out_dput:
+ if (de != NULL)
+ l_dput(de);
+ up(&parent_inode->i_sem);
+ pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+ RETURN(rc);
}
-
-EXPORT_SYMBOL(mds_register_fs_type);
-EXPORT_SYMBOL(mds_unregister_fs_type);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff