/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License v.2.
+ * of the GNU General Public License version 2.
*/
#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
-#include <linux/vmalloc.h>
#include <linux/blkdev.h>
#include <linux/kthread.h>
+#include <linux/namei.h>
+#include <linux/mount.h>
#include <linux/gfs2_ondisk.h>
+#include <linux/slow-work.h>
+#include <linux/quotaops.h>
#include "gfs2.h"
-#include "lm_interface.h"
#include "incore.h"
-#include "daemon.h"
+#include "bmap.h"
#include "glock.h"
#include "glops.h"
#include "inode.h"
-#include "lm.h"
-#include "mount.h"
-#include "ops_export.h"
-#include "ops_fstype.h"
-#include "ops_super.h"
#include "recovery.h"
#include "rgrp.h"
#include "super.h"
#include "sys.h"
#include "util.h"
+#include "log.h"
+#include "quota.h"
+#include "dir.h"
+#include "trace_gfs2.h"
#define DO 0
#define UNDO 1
-extern struct dentry_operations gfs2_dops;
+static const u32 gfs2_old_fs_formats[] = {
+ 0
+};
+
+static const u32 gfs2_old_multihost_formats[] = {
+ 0
+};
+
+/**
+ * gfs2_tune_init - Fill a gfs2_tune structure with default values
+ * @gt: tune
+ *
+ */
+
+static void gfs2_tune_init(struct gfs2_tune *gt)
+{
+ spin_lock_init(>->gt_spin);
+
+ gt->gt_incore_log_blocks = 1024;
+ gt->gt_logd_secs = 1;
+ gt->gt_quota_simul_sync = 64;
+ gt->gt_quota_warn_period = 10;
+ gt->gt_quota_scale_num = 1;
+ gt->gt_quota_scale_den = 1;
+ gt->gt_new_files_jdata = 0;
+ gt->gt_max_readahead = 1 << 18;
+ gt->gt_stall_secs = 600;
+ gt->gt_complain_secs = 10;
+}
static struct gfs2_sbd *init_sbd(struct super_block *sb)
{
struct gfs2_sbd *sdp;
- unsigned int x;
- sdp = vmalloc(sizeof(struct gfs2_sbd));
+ sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL);
if (!sdp)
return NULL;
- memset(sdp, 0, sizeof(struct gfs2_sbd));
-
sb->s_fs_info = sdp;
sdp->sd_vfs = sb;
gfs2_tune_init(&sdp->sd_tune);
- for (x = 0; x < GFS2_GL_HASH_SIZE; x++) {
- rwlock_init(&sdp->sd_gl_hash[x].hb_lock);
- INIT_LIST_HEAD(&sdp->sd_gl_hash[x].hb_list);
- }
- INIT_LIST_HEAD(&sdp->sd_reclaim_list);
- spin_lock_init(&sdp->sd_reclaim_lock);
- init_waitqueue_head(&sdp->sd_reclaim_wq);
-
- mutex_init(&sdp->sd_inum_mutex);
+ init_waitqueue_head(&sdp->sd_glock_wait);
+ atomic_set(&sdp->sd_glock_disposal, 0);
spin_lock_init(&sdp->sd_statfs_spin);
- mutex_init(&sdp->sd_statfs_mutex);
spin_lock_init(&sdp->sd_rindex_spin);
mutex_init(&sdp->sd_rindex_mutex);
INIT_LIST_HEAD(&sdp->sd_rindex_list);
INIT_LIST_HEAD(&sdp->sd_rindex_mru_list);
- INIT_LIST_HEAD(&sdp->sd_rindex_recent_list);
INIT_LIST_HEAD(&sdp->sd_jindex_list);
spin_lock_init(&sdp->sd_jindex_spin);
mutex_init(&sdp->sd_jindex_mutex);
INIT_LIST_HEAD(&sdp->sd_quota_list);
- spin_lock_init(&sdp->sd_quota_spin);
mutex_init(&sdp->sd_quota_mutex);
+ init_waitqueue_head(&sdp->sd_quota_wait);
+ INIT_LIST_HEAD(&sdp->sd_trunc_list);
+ spin_lock_init(&sdp->sd_trunc_lock);
spin_lock_init(&sdp->sd_log_lock);
- INIT_LIST_HEAD(&sdp->sd_log_le_gl);
INIT_LIST_HEAD(&sdp->sd_log_le_buf);
INIT_LIST_HEAD(&sdp->sd_log_le_revoke);
INIT_LIST_HEAD(&sdp->sd_log_le_rg);
INIT_LIST_HEAD(&sdp->sd_log_le_databuf);
+ INIT_LIST_HEAD(&sdp->sd_log_le_ordered);
mutex_init(&sdp->sd_log_reserve_mutex);
INIT_LIST_HEAD(&sdp->sd_ail1_list);
INIT_LIST_HEAD(&sdp->sd_ail2_list);
init_rwsem(&sdp->sd_log_flush_lock);
- INIT_LIST_HEAD(&sdp->sd_log_flush_list);
+ atomic_set(&sdp->sd_log_in_flight, 0);
+ init_waitqueue_head(&sdp->sd_log_flush_wait);
INIT_LIST_HEAD(&sdp->sd_revoke_list);
return sdp;
}
-static void init_vfs(struct super_block *sb, unsigned noatime)
+
+/**
+ * gfs2_check_sb - Check superblock
+ * @sdp: the filesystem
+ * @sb: The superblock
+ * @silent: Don't print a message if the check fails
+ *
+ * Checks the version code of the FS is one that we understand how to
+ * read and that the sizes of the various on-disk structures have not
+ * changed.
+ */
+
+static int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb_host *sb, int silent)
{
- struct gfs2_sbd *sdp = sb->s_fs_info;
+ unsigned int x;
- sb->s_magic = GFS2_MAGIC;
- sb->s_op = &gfs2_super_ops;
- sb->s_export_op = &gfs2_export_ops;
- sb->s_maxbytes = MAX_LFS_FILESIZE;
+ if (sb->sb_magic != GFS2_MAGIC ||
+ sb->sb_type != GFS2_METATYPE_SB) {
+ if (!silent)
+ printk(KERN_WARNING "GFS2: not a GFS2 filesystem\n");
+ return -EINVAL;
+ }
+
+ /* If format numbers match exactly, we're done. */
+
+ if (sb->sb_fs_format == GFS2_FORMAT_FS &&
+ sb->sb_multihost_format == GFS2_FORMAT_MULTI)
+ return 0;
+
+ if (sb->sb_fs_format != GFS2_FORMAT_FS) {
+ for (x = 0; gfs2_old_fs_formats[x]; x++)
+ if (gfs2_old_fs_formats[x] == sb->sb_fs_format)
+ break;
+
+ if (!gfs2_old_fs_formats[x]) {
+ printk(KERN_WARNING
+ "GFS2: code version (%u, %u) is incompatible "
+ "with ondisk format (%u, %u)\n",
+ GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
+ sb->sb_fs_format, sb->sb_multihost_format);
+ printk(KERN_WARNING
+ "GFS2: I don't know how to upgrade this FS\n");
+ return -EINVAL;
+ }
+ }
+
+ if (sb->sb_multihost_format != GFS2_FORMAT_MULTI) {
+ for (x = 0; gfs2_old_multihost_formats[x]; x++)
+ if (gfs2_old_multihost_formats[x] ==
+ sb->sb_multihost_format)
+ break;
+
+ if (!gfs2_old_multihost_formats[x]) {
+ printk(KERN_WARNING
+ "GFS2: code version (%u, %u) is incompatible "
+ "with ondisk format (%u, %u)\n",
+ GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
+ sb->sb_fs_format, sb->sb_multihost_format);
+ printk(KERN_WARNING
+ "GFS2: I don't know how to upgrade this FS\n");
+ return -EINVAL;
+ }
+ }
+
+ if (!sdp->sd_args.ar_upgrade) {
+ printk(KERN_WARNING
+ "GFS2: code version (%u, %u) is incompatible "
+ "with ondisk format (%u, %u)\n",
+ GFS2_FORMAT_FS, GFS2_FORMAT_MULTI,
+ sb->sb_fs_format, sb->sb_multihost_format);
+ printk(KERN_INFO
+ "GFS2: Use the \"upgrade\" mount option to upgrade "
+ "the FS\n");
+ printk(KERN_INFO "GFS2: See the manual for more details\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void end_bio_io_page(struct bio *bio, int error)
+{
+ struct page *page = bio->bi_private;
+
+ if (!error)
+ SetPageUptodate(page);
+ else
+ printk(KERN_WARNING "gfs2: error %d reading superblock\n", error);
+ unlock_page(page);
+}
+
+static void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf)
+{
+ const struct gfs2_sb *str = buf;
+
+ sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic);
+ sb->sb_type = be32_to_cpu(str->sb_header.mh_type);
+ sb->sb_format = be32_to_cpu(str->sb_header.mh_format);
+ sb->sb_fs_format = be32_to_cpu(str->sb_fs_format);
+ sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format);
+ sb->sb_bsize = be32_to_cpu(str->sb_bsize);
+ sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift);
+ sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr);
+ sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino);
+ sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr);
+ sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino);
+
+ memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN);
+ memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN);
+ memcpy(sb->sb_uuid, str->sb_uuid, 16);
+}
+
+/**
+ * gfs2_read_super - Read the gfs2 super block from disk
+ * @sdp: The GFS2 super block
+ * @sector: The location of the super block
+ * @error: The error code to return
+ *
+ * This uses the bio functions to read the super block from disk
+ * because we want to be 100% sure that we never read cached data.
+ * A super block is read twice only during each GFS2 mount and is
+ * never written to by the filesystem. The first time its read no
+ * locks are held, and the only details which are looked at are those
+ * relating to the locking protocol. Once locking is up and working,
+ * the sb is read again under the lock to establish the location of
+ * the master directory (contains pointers to journals etc) and the
+ * root directory.
+ *
+ * Returns: 0 on success or error
+ */
+
+static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector)
+{
+ struct super_block *sb = sdp->sd_vfs;
+ struct gfs2_sb *p;
+ struct page *page;
+ struct bio *bio;
+
+ page = alloc_page(GFP_NOFS);
+ if (unlikely(!page))
+ return -ENOBUFS;
+
+ ClearPageUptodate(page);
+ ClearPageDirty(page);
+ lock_page(page);
+
+ bio = bio_alloc(GFP_NOFS, 1);
+ bio->bi_sector = sector * (sb->s_blocksize >> 9);
+ bio->bi_bdev = sb->s_bdev;
+ bio_add_page(bio, page, PAGE_SIZE, 0);
+
+ bio->bi_end_io = end_bio_io_page;
+ bio->bi_private = page;
+ submit_bio(READ_SYNC | (1 << BIO_RW_META), bio);
+ wait_on_page_locked(page);
+ bio_put(bio);
+ if (!PageUptodate(page)) {
+ __free_page(page);
+ return -EIO;
+ }
+ p = kmap(page);
+ gfs2_sb_in(&sdp->sd_sb, p);
+ kunmap(page);
+ __free_page(page);
+ return 0;
+}
+
+/**
+ * gfs2_read_sb - Read super block
+ * @sdp: The GFS2 superblock
+ * @silent: Don't print message if mount fails
+ *
+ */
+
+static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent)
+{
+ u32 hash_blocks, ind_blocks, leaf_blocks;
+ u32 tmp_blocks;
+ unsigned int x;
+ int error;
+
+ error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
+ if (error) {
+ if (!silent)
+ fs_err(sdp, "can't read superblock\n");
+ return error;
+ }
+
+ error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
+ if (error)
+ return error;
+
+ sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
+ GFS2_BASIC_BLOCK_SHIFT;
+ sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
+ sdp->sd_diptrs = (sdp->sd_sb.sb_bsize -
+ sizeof(struct gfs2_dinode)) / sizeof(u64);
+ sdp->sd_inptrs = (sdp->sd_sb.sb_bsize -
+ sizeof(struct gfs2_meta_header)) / sizeof(u64);
+ sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header);
+ sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2;
+ sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1;
+ sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64);
+ sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize -
+ sizeof(struct gfs2_meta_header)) /
+ sizeof(struct gfs2_quota_change);
+
+ /* Compute maximum reservation required to add a entry to a directory */
+
+ hash_blocks = DIV_ROUND_UP(sizeof(u64) * (1 << GFS2_DIR_MAX_DEPTH),
+ sdp->sd_jbsize);
+
+ ind_blocks = 0;
+ for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) {
+ tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs);
+ ind_blocks += tmp_blocks;
+ }
+
+ leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH;
+
+ sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks;
+
+ sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize -
+ sizeof(struct gfs2_dinode);
+ sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs;
+ for (x = 2;; x++) {
+ u64 space, d;
+ u32 m;
- if (sb->s_flags & (MS_NOATIME | MS_NODIRATIME))
- set_bit(noatime, &sdp->sd_flags);
+ space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs;
+ d = space;
+ m = do_div(d, sdp->sd_inptrs);
- /* Don't let the VFS update atimes. GFS2 handles this itself. */
- sb->s_flags |= MS_NOATIME | MS_NODIRATIME;
+ if (d != sdp->sd_heightsize[x - 1] || m)
+ break;
+ sdp->sd_heightsize[x] = space;
+ }
+ sdp->sd_max_height = x;
+ sdp->sd_heightsize[x] = ~0;
+ gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT);
+
+ sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize -
+ sizeof(struct gfs2_dinode);
+ sdp->sd_jheightsize[1] = sdp->sd_jbsize * sdp->sd_diptrs;
+ for (x = 2;; x++) {
+ u64 space, d;
+ u32 m;
+
+ space = sdp->sd_jheightsize[x - 1] * sdp->sd_inptrs;
+ d = space;
+ m = do_div(d, sdp->sd_inptrs);
+
+ if (d != sdp->sd_jheightsize[x - 1] || m)
+ break;
+ sdp->sd_jheightsize[x] = space;
+ }
+ sdp->sd_max_jheight = x;
+ sdp->sd_jheightsize[x] = ~0;
+ gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT);
+
+ return 0;
}
static int init_names(struct gfs2_sbd *sdp, int silent)
{
- struct gfs2_sb *sb = NULL;
char *proto, *table;
int error = 0;
/* Try to autodetect */
if (!proto[0] || !table[0]) {
- struct buffer_head *bh;
- bh = sb_getblk(sdp->sd_vfs,
- GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
- lock_buffer(bh);
- clear_buffer_uptodate(bh);
- clear_buffer_dirty(bh);
- unlock_buffer(bh);
- ll_rw_block(READ, 1, &bh);
- wait_on_buffer(bh);
-
- if (!buffer_uptodate(bh)) {
- brelse(bh);
- return -EIO;
- }
-
- sb = kmalloc(sizeof(struct gfs2_sb), GFP_KERNEL);
- if (!sb) {
- brelse(bh);
- return -ENOMEM;
- }
- gfs2_sb_in(sb, bh->b_data);
- brelse(bh);
+ error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
+ if (error)
+ return error;
- error = gfs2_check_sb(sdp, sb, silent);
+ error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
if (error)
goto out;
if (!proto[0])
- proto = sb->sb_lockproto;
+ proto = sdp->sd_sb.sb_lockproto;
if (!table[0])
- table = sb->sb_locktable;
+ table = sdp->sd_sb.sb_locktable;
}
if (!table[0])
table = sdp->sd_vfs->s_id;
- snprintf(sdp->sd_proto_name, GFS2_FSNAME_LEN, "%s", proto);
- snprintf(sdp->sd_table_name, GFS2_FSNAME_LEN, "%s", table);
+ strlcpy(sdp->sd_proto_name, proto, GFS2_FSNAME_LEN);
+ strlcpy(sdp->sd_table_name, table, GFS2_FSNAME_LEN);
- out:
- kfree(sb);
+ table = sdp->sd_table_name;
+ while ((table = strchr(table, '/')))
+ *table = '_';
+out:
return error;
}
static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
int undo)
{
- struct task_struct *p;
int error = 0;
if (undo)
goto fail_trans;
- p = kthread_run(gfs2_scand, sdp, "gfs2_scand");
- error = IS_ERR(p);
- if (error) {
- fs_err(sdp, "can't start scand thread: %d\n", error);
- return error;
- }
- sdp->sd_scand_process = p;
-
- for (sdp->sd_glockd_num = 0;
- sdp->sd_glockd_num < sdp->sd_args.ar_num_glockd;
- sdp->sd_glockd_num++) {
- p = kthread_run(gfs2_glockd, sdp, "gfs2_glockd");
- error = IS_ERR(p);
- if (error) {
- fs_err(sdp, "can't start glockd thread: %d\n", error);
- goto fail;
- }
- sdp->sd_glockd_process[sdp->sd_glockd_num] = p;
- }
-
error = gfs2_glock_nq_num(sdp,
GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
fs_err(sdp, "can't create transaction glock: %d\n", error);
goto fail_rename;
}
- set_bit(GLF_STICKY, &sdp->sd_trans_gl->gl_flags);
return 0;
fail_trans:
gfs2_glock_put(sdp->sd_trans_gl);
-
fail_rename:
gfs2_glock_put(sdp->sd_rename_gl);
-
fail_live:
gfs2_glock_dq_uninit(&sdp->sd_live_gh);
-
fail_mount:
gfs2_glock_dq_uninit(mount_gh);
-
fail:
- while (sdp->sd_glockd_num--)
- kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]);
-
- kthread_stop(sdp->sd_scand_process);
-
return error;
}
-static struct inode *gfs2_lookup_root(struct super_block *sb,
- struct gfs2_inum *inum)
+static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr,
+ u64 no_addr, const char *name)
{
- return gfs2_inode_lookup(sb, inum, DT_DIR);
+ struct gfs2_sbd *sdp = sb->s_fs_info;
+ struct dentry *dentry;
+ struct inode *inode;
+
+ inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, 0);
+ if (IS_ERR(inode)) {
+ fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode));
+ return PTR_ERR(inode);
+ }
+ dentry = d_alloc_root(inode);
+ if (!dentry) {
+ fs_err(sdp, "can't alloc %s dentry\n", name);
+ iput(inode);
+ return -ENOMEM;
+ }
+ dentry->d_op = &gfs2_dops;
+ *dptr = dentry;
+ return 0;
}
-static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
+static int init_sb(struct gfs2_sbd *sdp, int silent)
{
struct super_block *sb = sdp->sd_vfs;
struct gfs2_holder sb_gh;
- struct gfs2_inum *inum;
- struct inode *inode;
- int error = 0;
-
- if (undo) {
- if (sb->s_root) {
- dput(sb->s_root);
- sb->s_root = NULL;
- }
- return 0;
- }
-
- error = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops,
- LM_ST_SHARED, 0, &sb_gh);
- if (error) {
- fs_err(sdp, "can't acquire superblock glock: %d\n", error);
- return error;
+ u64 no_addr;
+ int ret;
+
+ ret = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops,
+ LM_ST_SHARED, 0, &sb_gh);
+ if (ret) {
+ fs_err(sdp, "can't acquire superblock glock: %d\n", ret);
+ return ret;
}
- error = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
- if (error) {
- fs_err(sdp, "can't read superblock: %d\n", error);
+ ret = gfs2_read_sb(sdp, silent);
+ if (ret) {
+ fs_err(sdp, "can't read superblock: %d\n", ret);
goto out;
}
/* Set up the buffer cache and SB for real */
- if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
- error = -EINVAL;
+ if (sdp->sd_sb.sb_bsize < bdev_logical_block_size(sb->s_bdev)) {
+ ret = -EINVAL;
fs_err(sdp, "FS block size (%u) is too small for device "
"block size (%u)\n",
- sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
+ sdp->sd_sb.sb_bsize, bdev_logical_block_size(sb->s_bdev));
goto out;
}
if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
- error = -EINVAL;
+ ret = -EINVAL;
fs_err(sdp, "FS block size (%u) is too big for machine "
"page size (%u)\n",
sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
/* Get the root inode */
- inum = &sdp->sd_sb.sb_root_dir;
- if (sb->s_type == &gfs2meta_fs_type)
- inum = &sdp->sd_sb.sb_master_dir;
- inode = gfs2_lookup_root(sb, inum);
- if (IS_ERR(inode)) {
- error = PTR_ERR(inode);
- fs_err(sdp, "can't read in root inode: %d\n", error);
+ no_addr = sdp->sd_sb.sb_root_dir.no_addr;
+ ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root");
+ if (ret)
goto out;
- }
- sb->s_root = d_alloc_root(inode);
- if (!sb->s_root) {
- fs_err(sdp, "can't get root dentry\n");
- error = -ENOMEM;
- iput(inode);
+ /* Get the master inode */
+ no_addr = sdp->sd_sb.sb_master_dir.no_addr;
+ ret = gfs2_lookup_root(sb, &sdp->sd_master_dir, no_addr, "master");
+ if (ret) {
+ dput(sdp->sd_root_dir);
+ goto out;
}
- sb->s_root->d_op = &gfs2_dops;
+ sb->s_root = dget(sdp->sd_args.ar_meta ? sdp->sd_master_dir : sdp->sd_root_dir);
out:
gfs2_glock_dq_uninit(&sb_gh);
+ return ret;
+}
+
+/**
+ * map_journal_extents - create a reusable "extent" mapping from all logical
+ * blocks to all physical blocks for the given journal. This will save
+ * us time when writing journal blocks. Most journals will have only one
+ * extent that maps all their logical blocks. That's because gfs2.mkfs
+ * arranges the journal blocks sequentially to maximize performance.
+ * So the extent would map the first block for the entire file length.
+ * However, gfs2_jadd can happen while file activity is happening, so
+ * those journals may not be sequential. Less likely is the case where
+ * the users created their own journals by mounting the metafs and
+ * laying it out. But it's still possible. These journals might have
+ * several extents.
+ *
+ * TODO: This should be done in bigger chunks rather than one block at a time,
+ * but since it's only done at mount time, I'm not worried about the
+ * time it takes.
+ */
+static int map_journal_extents(struct gfs2_sbd *sdp)
+{
+ struct gfs2_jdesc *jd = sdp->sd_jdesc;
+ unsigned int lb;
+ u64 db, prev_db; /* logical block, disk block, prev disk block */
+ struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
+ struct gfs2_journal_extent *jext = NULL;
+ struct buffer_head bh;
+ int rc = 0;
+
+ prev_db = 0;
+
+ for (lb = 0; lb < ip->i_disksize >> sdp->sd_sb.sb_bsize_shift; lb++) {
+ bh.b_state = 0;
+ bh.b_blocknr = 0;
+ bh.b_size = 1 << ip->i_inode.i_blkbits;
+ rc = gfs2_block_map(jd->jd_inode, lb, &bh, 0);
+ db = bh.b_blocknr;
+ if (rc || !db) {
+ printk(KERN_INFO "GFS2 journal mapping error %d: lb="
+ "%u db=%llu\n", rc, lb, (unsigned long long)db);
+ break;
+ }
+ if (!prev_db || db != prev_db + 1) {
+ jext = kzalloc(sizeof(struct gfs2_journal_extent),
+ GFP_KERNEL);
+ if (!jext) {
+ printk(KERN_INFO "GFS2 error: out of memory "
+ "mapping journal extents.\n");
+ rc = -ENOMEM;
+ break;
+ }
+ jext->dblock = db;
+ jext->lblock = lb;
+ jext->blocks = 1;
+ list_add_tail(&jext->extent_list, &jd->extent_list);
+ } else {
+ jext->blocks++;
+ }
+ prev_db = db;
+ }
+ return rc;
+}
+
+static void gfs2_others_may_mount(struct gfs2_sbd *sdp)
+{
+ char *message = "FIRSTMOUNT=Done";
+ char *envp[] = { message, NULL };
+ struct lm_lockstruct *ls = &sdp->sd_lockstruct;
+ ls->ls_first_done = 1;
+ kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp);
+}
+
+/**
+ * gfs2_jindex_hold - Grab a lock on the jindex
+ * @sdp: The GFS2 superblock
+ * @ji_gh: the holder for the jindex glock
+ *
+ * Returns: errno
+ */
+
+static int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
+{
+ struct gfs2_inode *dip = GFS2_I(sdp->sd_jindex);
+ struct qstr name;
+ char buf[20];
+ struct gfs2_jdesc *jd;
+ int error;
+
+ name.name = buf;
+
+ mutex_lock(&sdp->sd_jindex_mutex);
+
+ for (;;) {
+ error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, ji_gh);
+ if (error)
+ break;
+
+ name.len = sprintf(buf, "journal%u", sdp->sd_journals);
+ name.hash = gfs2_disk_hash(name.name, name.len);
+
+ error = gfs2_dir_check(sdp->sd_jindex, &name, NULL);
+ if (error == -ENOENT) {
+ error = 0;
+ break;
+ }
+
+ gfs2_glock_dq_uninit(ji_gh);
+
+ if (error)
+ break;
+
+ error = -ENOMEM;
+ jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL);
+ if (!jd)
+ break;
+
+ INIT_LIST_HEAD(&jd->extent_list);
+ slow_work_init(&jd->jd_work, &gfs2_recover_ops);
+ jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1);
+ if (!jd->jd_inode || IS_ERR(jd->jd_inode)) {
+ if (!jd->jd_inode)
+ error = -ENOENT;
+ else
+ error = PTR_ERR(jd->jd_inode);
+ kfree(jd);
+ break;
+ }
+
+ spin_lock(&sdp->sd_jindex_spin);
+ jd->jd_jid = sdp->sd_journals++;
+ list_add_tail(&jd->jd_list, &sdp->sd_jindex_list);
+ spin_unlock(&sdp->sd_jindex_spin);
+ }
+
+ mutex_unlock(&sdp->sd_jindex_mutex);
+
return error;
}
static int init_journal(struct gfs2_sbd *sdp, int undo)
{
+ struct inode *master = sdp->sd_master_dir->d_inode;
struct gfs2_holder ji_gh;
- struct task_struct *p;
struct gfs2_inode *ip;
int jindex = 1;
int error = 0;
if (undo) {
jindex = 0;
- goto fail_recoverd;
+ goto fail_jinode_gh;
}
- sdp->sd_jindex = gfs2_lookup_simple(sdp->sd_master_dir, "jindex");
+ sdp->sd_jindex = gfs2_lookup_simple(master, "jindex");
if (IS_ERR(sdp->sd_jindex)) {
fs_err(sdp, "can't lookup journal index: %d\n", error);
return PTR_ERR(sdp->sd_jindex);
}
ip = GFS2_I(sdp->sd_jindex);
- set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
/* Load in the journal index special file */
goto fail;
}
- error = -EINVAL;
+ error = -EUSERS;
if (!gfs2_jindex_size(sdp)) {
fs_err(sdp, "no journals!\n");
- goto fail_jindex;
+ goto fail_jindex;
}
if (sdp->sd_args.ar_spectator) {
sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
- sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
+ atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
} else {
if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
fs_err(sdp, "can't mount journal #%u\n",
ip = GFS2_I(sdp->sd_jdesc->jd_inode);
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
- LM_FLAG_NOEXP | GL_EXACT,
+ LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE,
&sdp->sd_jinode_gh);
if (error) {
fs_err(sdp, "can't acquire journal inode glock: %d\n",
sdp->sd_jdesc->jd_jid, error);
goto fail_jinode_gh;
}
- sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
+ atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
+
+ /* Map the extents for this journal's blocks */
+ map_journal_extents(sdp);
}
+ trace_gfs2_log_blocks(sdp, atomic_read(&sdp->sd_log_blks_free));
if (sdp->sd_lockstruct.ls_first) {
unsigned int x;
}
}
- gfs2_lm_others_may_mount(sdp);
+ gfs2_others_may_mount(sdp);
} else if (!sdp->sd_args.ar_spectator) {
error = gfs2_recover_journal(sdp->sd_jdesc);
if (error) {
gfs2_glock_dq_uninit(&ji_gh);
jindex = 0;
- p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd");
- error = IS_ERR(p);
- if (error) {
- fs_err(sdp, "can't start recoverd thread: %d\n", error);
- goto fail_jinode_gh;
- }
- sdp->sd_recoverd_process = p;
-
return 0;
- fail_recoverd:
- kthread_stop(sdp->sd_recoverd_process);
-
- fail_jinode_gh:
+fail_jinode_gh:
if (!sdp->sd_args.ar_spectator)
gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
-
- fail_journal_gh:
+fail_journal_gh:
if (!sdp->sd_args.ar_spectator)
gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
-
- fail_jindex:
+fail_jindex:
gfs2_jindex_free(sdp);
if (jindex)
gfs2_glock_dq_uninit(&ji_gh);
-
- fail:
+fail:
iput(sdp->sd_jindex);
-
return error;
}
{
int error = 0;
struct gfs2_inode *ip;
- struct inode *inode;
+ struct inode *master = sdp->sd_master_dir->d_inode;
if (undo)
goto fail_qinode;
- inode = gfs2_lookup_root(sdp->sd_vfs, &sdp->sd_sb.sb_master_dir);
- if (IS_ERR(inode)) {
- error = PTR_ERR(inode);
- fs_err(sdp, "can't read in master directory: %d\n", error);
- goto fail;
- }
- sdp->sd_master_dir = inode;
-
error = init_journal(sdp, undo);
if (error)
- goto fail_master;
-
- /* Read in the master inode number inode */
- sdp->sd_inum_inode = gfs2_lookup_simple(sdp->sd_master_dir, "inum");
- if (IS_ERR(sdp->sd_inum_inode)) {
- error = PTR_ERR(sdp->sd_inum_inode);
- fs_err(sdp, "can't read in inum inode: %d\n", error);
- goto fail_journal;
- }
-
+ goto fail;
/* Read in the master statfs inode */
- sdp->sd_statfs_inode = gfs2_lookup_simple(sdp->sd_master_dir, "statfs");
+ sdp->sd_statfs_inode = gfs2_lookup_simple(master, "statfs");
if (IS_ERR(sdp->sd_statfs_inode)) {
error = PTR_ERR(sdp->sd_statfs_inode);
fs_err(sdp, "can't read in statfs inode: %d\n", error);
- goto fail_inum;
+ goto fail_journal;
}
/* Read in the resource index inode */
- sdp->sd_rindex = gfs2_lookup_simple(sdp->sd_master_dir, "rindex");
+ sdp->sd_rindex = gfs2_lookup_simple(master, "rindex");
if (IS_ERR(sdp->sd_rindex)) {
error = PTR_ERR(sdp->sd_rindex);
fs_err(sdp, "can't get resource index inode: %d\n", error);
goto fail_statfs;
}
ip = GFS2_I(sdp->sd_rindex);
- set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
- sdp->sd_rindex_vn = ip->i_gl->gl_vn - 1;
+ sdp->sd_rindex_uptodate = 0;
/* Read in the quota inode */
- sdp->sd_quota_inode = gfs2_lookup_simple(sdp->sd_master_dir, "quota");
+ sdp->sd_quota_inode = gfs2_lookup_simple(master, "quota");
if (IS_ERR(sdp->sd_quota_inode)) {
error = PTR_ERR(sdp->sd_quota_inode);
fs_err(sdp, "can't get quota file inode: %d\n", error);
fail_qinode:
iput(sdp->sd_quota_inode);
-
fail_rindex:
gfs2_clear_rgrpd(sdp);
iput(sdp->sd_rindex);
-
fail_statfs:
iput(sdp->sd_statfs_inode);
-
-fail_inum:
- iput(sdp->sd_inum_inode);
fail_journal:
init_journal(sdp, UNDO);
-fail_master:
- iput(sdp->sd_master_dir);
fail:
return error;
}
char buf[30];
int error = 0;
struct gfs2_inode *ip;
+ struct inode *master = sdp->sd_master_dir->d_inode;
if (sdp->sd_args.ar_spectator)
return 0;
if (undo)
goto fail_qc_gh;
- pn = gfs2_lookup_simple(sdp->sd_master_dir, "per_node");
+ pn = gfs2_lookup_simple(master, "per_node");
if (IS_ERR(pn)) {
error = PTR_ERR(pn);
fs_err(sdp, "can't find per_node directory: %d\n", error);
return error;
}
- sprintf(buf, "inum_range%u", sdp->sd_jdesc->jd_jid);
- sdp->sd_ir_inode = gfs2_lookup_simple(pn, buf);
- if (IS_ERR(sdp->sd_ir_inode)) {
- error = PTR_ERR(sdp->sd_ir_inode);
- fs_err(sdp, "can't find local \"ir\" file: %d\n", error);
- goto fail;
- }
-
sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf);
if (IS_ERR(sdp->sd_sc_inode)) {
error = PTR_ERR(sdp->sd_sc_inode);
fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
- goto fail_ir_i;
+ goto fail;
}
sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
iput(pn);
pn = NULL;
- ip = GFS2_I(sdp->sd_ir_inode);
- error = gfs2_glock_nq_init(ip->i_gl,
- LM_ST_EXCLUSIVE, 0,
- &sdp->sd_ir_gh);
- if (error) {
- fs_err(sdp, "can't lock local \"ir\" file: %d\n", error);
- goto fail_qc_i;
- }
-
ip = GFS2_I(sdp->sd_sc_inode);
- error = gfs2_glock_nq_init(ip->i_gl,
- LM_ST_EXCLUSIVE, 0,
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
&sdp->sd_sc_gh);
if (error) {
fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
- goto fail_ir_gh;
+ goto fail_qc_i;
}
ip = GFS2_I(sdp->sd_qc_inode);
- error = gfs2_glock_nq_init(ip->i_gl,
- LM_ST_EXCLUSIVE, 0,
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
&sdp->sd_qc_gh);
if (error) {
fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
return 0;
- fail_qc_gh:
+fail_qc_gh:
gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
-
- fail_ut_gh:
-
+fail_ut_gh:
gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
-
- fail_ir_gh:
- gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
-
- fail_qc_i:
+fail_qc_i:
iput(sdp->sd_qc_inode);
-
- fail_ut_i:
-
+fail_ut_i:
iput(sdp->sd_sc_inode);
-
- fail_ir_i:
- iput(sdp->sd_ir_inode);
-
- fail:
+fail:
if (pn)
iput(pn);
return error;
goto fail_quotad;
sdp->sd_log_flush_time = jiffies;
- sdp->sd_jindex_refresh_time = jiffies;
p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
error = IS_ERR(p);
}
sdp->sd_logd_process = p;
- sdp->sd_statfs_sync_time = jiffies;
- sdp->sd_quota_sync_time = jiffies;
-
p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
error = IS_ERR(p);
if (error) {
return error;
}
+static const match_table_t nolock_tokens = {
+ { Opt_jid, "jid=%d\n", },
+ { Opt_err, NULL },
+};
+
+static void nolock_put_lock(struct kmem_cache *cachep, struct gfs2_glock *gl)
+{
+ struct gfs2_sbd *sdp = gl->gl_sbd;
+ kmem_cache_free(cachep, gl);
+ if (atomic_dec_and_test(&sdp->sd_glock_disposal))
+ wake_up(&sdp->sd_glock_wait);
+}
+
+static const struct lm_lockops nolock_ops = {
+ .lm_proto_name = "lock_nolock",
+ .lm_put_lock = nolock_put_lock,
+ .lm_tokens = &nolock_tokens,
+};
+
+/**
+ * gfs2_lm_mount - mount a locking protocol
+ * @sdp: the filesystem
+ * @args: mount arguements
+ * @silent: if 1, don't complain if the FS isn't a GFS2 fs
+ *
+ * Returns: errno
+ */
+
+static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent)
+{
+ const struct lm_lockops *lm;
+ struct lm_lockstruct *ls = &sdp->sd_lockstruct;
+ struct gfs2_args *args = &sdp->sd_args;
+ const char *proto = sdp->sd_proto_name;
+ const char *table = sdp->sd_table_name;
+ const char *fsname;
+ char *o, *options;
+ int ret;
+
+ if (!strcmp("lock_nolock", proto)) {
+ lm = &nolock_ops;
+ sdp->sd_args.ar_localflocks = 1;
+ sdp->sd_args.ar_localcaching = 1;
+#ifdef CONFIG_GFS2_FS_LOCKING_DLM
+ } else if (!strcmp("lock_dlm", proto)) {
+ lm = &gfs2_dlm_ops;
+#endif
+ } else {
+ printk(KERN_INFO "GFS2: can't find protocol %s\n", proto);
+ return -ENOENT;
+ }
+
+ fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table);
+
+ ls->ls_ops = lm;
+ ls->ls_first = 1;
+
+ for (options = args->ar_hostdata; (o = strsep(&options, ":")); ) {
+ substring_t tmp[MAX_OPT_ARGS];
+ int token, option;
+
+ if (!o || !*o)
+ continue;
+
+ token = match_token(o, *lm->lm_tokens, tmp);
+ switch (token) {
+ case Opt_jid:
+ ret = match_int(&tmp[0], &option);
+ if (ret || option < 0)
+ goto hostdata_error;
+ ls->ls_jid = option;
+ break;
+ case Opt_id:
+ /* Obsolete, but left for backward compat purposes */
+ break;
+ case Opt_first:
+ ret = match_int(&tmp[0], &option);
+ if (ret || (option != 0 && option != 1))
+ goto hostdata_error;
+ ls->ls_first = option;
+ break;
+ case Opt_nodir:
+ ret = match_int(&tmp[0], &option);
+ if (ret || (option != 0 && option != 1))
+ goto hostdata_error;
+ ls->ls_nodir = option;
+ break;
+ case Opt_err:
+ default:
+hostdata_error:
+ fs_info(sdp, "unknown hostdata (%s)\n", o);
+ return -EINVAL;
+ }
+ }
+
+ if (sdp->sd_args.ar_spectator)
+ snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.s", table);
+ else
+ snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u", table,
+ sdp->sd_lockstruct.ls_jid);
+
+ fsname = strchr(table, ':');
+ if (fsname)
+ fsname++;
+ if (lm->lm_mount == NULL) {
+ fs_info(sdp, "Now mounting FS...\n");
+ return 0;
+ }
+ ret = lm->lm_mount(sdp, fsname);
+ if (ret == 0)
+ fs_info(sdp, "Joined cluster. Now mounting FS...\n");
+ return ret;
+}
+
+void gfs2_lm_unmount(struct gfs2_sbd *sdp)
+{
+ const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops;
+ if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) &&
+ lm->lm_unmount)
+ lm->lm_unmount(sdp);
+}
+
+void gfs2_online_uevent(struct gfs2_sbd *sdp)
+{
+ struct super_block *sb = sdp->sd_vfs;
+ char ro[20];
+ char spectator[20];
+ char *envp[] = { ro, spectator, NULL };
+ sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0);
+ sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
+ kobject_uevent_env(&sdp->sd_kobj, KOBJ_ONLINE, envp);
+}
+
/**
* fill_super - Read in superblock
* @sb: The VFS superblock
* Returns: errno
*/
-static int fill_super(struct super_block *sb, void *data, int silent)
+static int fill_super(struct super_block *sb, struct gfs2_args *args, int silent)
{
struct gfs2_sbd *sdp;
struct gfs2_holder mount_gh;
printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
return -ENOMEM;
}
+ sdp->sd_args = *args;
- error = gfs2_mount_args(sdp, (char *)data, 0);
- if (error) {
- printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
- goto fail;
+ if (sdp->sd_args.ar_spectator) {
+ sb->s_flags |= MS_RDONLY;
+ set_bit(SDF_NORECOVERY, &sdp->sd_flags);
}
+ if (sdp->sd_args.ar_posix_acl)
+ sb->s_flags |= MS_POSIXACL;
+ if (sdp->sd_args.ar_nobarrier)
+ set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
- init_vfs(sb, SDF_NOATIME);
+ sb->s_magic = GFS2_MAGIC;
+ sb->s_op = &gfs2_super_ops;
+ sb->s_export_op = &gfs2_export_ops;
+ sb->s_xattr = gfs2_xattr_handlers;
+ sb->s_qcop = &gfs2_quotactl_ops;
+ sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
+ sb->s_time_gran = 1;
+ sb->s_maxbytes = MAX_LFS_FILESIZE;
/* Set up the buffer cache and fill in some fake block size values
to allow us to read-in the on-disk superblock. */
GFS2_BASIC_BLOCK_SHIFT;
sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
+ sdp->sd_tune.gt_log_flush_secs = sdp->sd_args.ar_commit;
+ sdp->sd_tune.gt_quota_quantum = sdp->sd_args.ar_quota_quantum;
+ if (sdp->sd_args.ar_statfs_quantum) {
+ sdp->sd_tune.gt_statfs_slow = 0;
+ sdp->sd_tune.gt_statfs_quantum = sdp->sd_args.ar_statfs_quantum;
+ }
+ else {
+ sdp->sd_tune.gt_statfs_slow = 1;
+ sdp->sd_tune.gt_statfs_quantum = 30;
+ }
+
error = init_names(sdp, silent);
if (error)
goto fail;
+ gfs2_create_debugfs_file(sdp);
+
error = gfs2_sys_fs_add(sdp);
if (error)
goto fail;
if (error)
goto fail_lm;
- error = init_sb(sdp, silent, DO);
+ error = init_sb(sdp, silent);
if (error)
goto fail_locking;
}
gfs2_glock_dq_uninit(&mount_gh);
-
+ gfs2_online_uevent(sdp);
return 0;
- fail_threads:
+fail_threads:
init_threads(sdp, UNDO);
-
- fail_per_node:
+fail_per_node:
init_per_node(sdp, UNDO);
-
- fail_inodes:
+fail_inodes:
init_inodes(sdp, UNDO);
-
- fail_sb:
- init_sb(sdp, 0, UNDO);
-
- fail_locking:
+fail_sb:
+ if (sdp->sd_root_dir)
+ dput(sdp->sd_root_dir);
+ if (sdp->sd_master_dir)
+ dput(sdp->sd_master_dir);
+ if (sb->s_root)
+ dput(sb->s_root);
+ sb->s_root = NULL;
+fail_locking:
init_locking(sdp, &mount_gh, UNDO);
-
- fail_lm:
- gfs2_gl_hash_clear(sdp, WAIT);
+fail_lm:
+ gfs2_gl_hash_clear(sdp);
gfs2_lm_unmount(sdp);
while (invalidate_inodes(sb))
yield();
-
- fail_sys:
+fail_sys:
gfs2_sys_fs_del(sdp);
-
- fail:
- vfree(sdp);
+fail:
+ gfs2_delete_debugfs_file(sdp);
+ kfree(sdp);
sb->s_fs_info = NULL;
-
return error;
}
+static int set_gfs2_super(struct super_block *s, void *data)
+{
+ s->s_bdev = data;
+ s->s_dev = s->s_bdev->bd_dev;
+
+ /*
+ * We set the bdi here to the queue backing, file systems can
+ * overwrite this in ->fill_super()
+ */
+ s->s_bdi = &bdev_get_queue(s->s_bdev)->backing_dev_info;
+ return 0;
+}
+
+static int test_gfs2_super(struct super_block *s, void *ptr)
+{
+ struct block_device *bdev = ptr;
+ return (bdev == s->s_bdev);
+}
+
+/**
+ * gfs2_get_sb - Get the GFS2 superblock
+ * @fs_type: The GFS2 filesystem type
+ * @flags: Mount flags
+ * @dev_name: The name of the device
+ * @data: The mount arguments
+ * @mnt: The vfsmnt for this mount
+ *
+ * Q. Why not use get_sb_bdev() ?
+ * A. We need to select one of two root directories to mount, independent
+ * of whether this is the initial, or subsequent, mount of this sb
+ *
+ * Returns: 0 or -ve on error
+ */
+
static int gfs2_get_sb(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data, struct vfsmount *mnt)
+ const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_bdev(fs_type, flags, dev_name, data, fill_super, mnt);
+ struct block_device *bdev;
+ struct super_block *s;
+ fmode_t mode = FMODE_READ;
+ int error;
+ struct gfs2_args args;
+ struct gfs2_sbd *sdp;
+
+ if (!(flags & MS_RDONLY))
+ mode |= FMODE_WRITE;
+
+ bdev = open_bdev_exclusive(dev_name, mode, fs_type);
+ if (IS_ERR(bdev))
+ return PTR_ERR(bdev);
+
+ /*
+ * once the super is inserted into the list by sget, s_umount
+ * will protect the lockfs code from trying to start a snapshot
+ * while we are mounting
+ */
+ mutex_lock(&bdev->bd_fsfreeze_mutex);
+ if (bdev->bd_fsfreeze_count > 0) {
+ mutex_unlock(&bdev->bd_fsfreeze_mutex);
+ error = -EBUSY;
+ goto error_bdev;
+ }
+ s = sget(fs_type, test_gfs2_super, set_gfs2_super, bdev);
+ mutex_unlock(&bdev->bd_fsfreeze_mutex);
+ error = PTR_ERR(s);
+ if (IS_ERR(s))
+ goto error_bdev;
+
+ memset(&args, 0, sizeof(args));
+ args.ar_quota = GFS2_QUOTA_DEFAULT;
+ args.ar_data = GFS2_DATA_DEFAULT;
+ args.ar_commit = 60;
+ args.ar_statfs_quantum = 30;
+ args.ar_quota_quantum = 60;
+ args.ar_errors = GFS2_ERRORS_DEFAULT;
+
+ error = gfs2_mount_args(&args, data);
+ if (error) {
+ printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
+ if (s->s_root)
+ goto error_super;
+ deactivate_locked_super(s);
+ return error;
+ }
+
+ if (s->s_root) {
+ error = -EBUSY;
+ if ((flags ^ s->s_flags) & MS_RDONLY)
+ goto error_super;
+ close_bdev_exclusive(bdev, mode);
+ } else {
+ char b[BDEVNAME_SIZE];
+
+ s->s_flags = flags;
+ s->s_mode = mode;
+ strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id));
+ sb_set_blocksize(s, block_size(bdev));
+ error = fill_super(s, &args, flags & MS_SILENT ? 1 : 0);
+ if (error) {
+ deactivate_locked_super(s);
+ return error;
+ }
+ s->s_flags |= MS_ACTIVE;
+ bdev->bd_super = s;
+ }
+
+ sdp = s->s_fs_info;
+ mnt->mnt_sb = s;
+ if (args.ar_meta)
+ mnt->mnt_root = dget(sdp->sd_master_dir);
+ else
+ mnt->mnt_root = dget(sdp->sd_root_dir);
+ return 0;
+
+error_super:
+ deactivate_locked_super(s);
+error_bdev:
+ close_bdev_exclusive(bdev, mode);
+ return error;
+}
+
+static int set_meta_super(struct super_block *s, void *ptr)
+{
+ return -EINVAL;
+}
+
+static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *data, struct vfsmount *mnt)
+{
+ struct super_block *s;
+ struct gfs2_sbd *sdp;
+ struct path path;
+ int error;
+
+ error = kern_path(dev_name, LOOKUP_FOLLOW, &path);
+ if (error) {
+ printk(KERN_WARNING "GFS2: path_lookup on %s returned error %d\n",
+ dev_name, error);
+ return error;
+ }
+ s = sget(&gfs2_fs_type, test_gfs2_super, set_meta_super,
+ path.dentry->d_inode->i_sb->s_bdev);
+ path_put(&path);
+ if (IS_ERR(s)) {
+ printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n");
+ return PTR_ERR(s);
+ }
+ if ((flags ^ s->s_flags) & MS_RDONLY) {
+ deactivate_locked_super(s);
+ return -EBUSY;
+ }
+ sdp = s->s_fs_info;
+ mnt->mnt_sb = s;
+ mnt->mnt_root = dget(sdp->sd_master_dir);
+ return 0;
}
static void gfs2_kill_sb(struct super_block *sb)
{
+ struct gfs2_sbd *sdp = sb->s_fs_info;
+
+ if (sdp == NULL) {
+ kill_block_super(sb);
+ return;
+ }
+
+ gfs2_meta_syncfs(sdp);
+ dput(sdp->sd_root_dir);
+ dput(sdp->sd_master_dir);
+ sdp->sd_root_dir = NULL;
+ sdp->sd_master_dir = NULL;
+ shrink_dcache_sb(sb);
kill_block_super(sb);
+ gfs2_delete_debugfs_file(sdp);
+ kfree(sdp);
}
struct file_system_type gfs2_fs_type = {
struct file_system_type gfs2meta_fs_type = {
.name = "gfs2meta",
.fs_flags = FS_REQUIRES_DEV,
- .get_sb = gfs2_get_sb,
- .kill_sb = gfs2_kill_sb,
+ .get_sb = gfs2_get_sb_meta,
.owner = THIS_MODULE,
};
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff