"(NILFS)");
MODULE_LICENSE("GPL");
+struct kmem_cache *nilfs_inode_cachep;
+struct kmem_cache *nilfs_transaction_cachep;
+struct kmem_cache *nilfs_segbuf_cachep;
+struct kmem_cache *nilfs_btree_path_cache;
+
static int nilfs_remount(struct super_block *sb, int *flags, char *data);
/**
va_end(args);
}
-static struct kmem_cache *nilfs_inode_cachep;
struct inode *nilfs_alloc_inode_common(struct the_nilfs *nilfs)
{
kmem_cache_free(nilfs_inode_cachep, NILFS_I(inode));
}
-static void init_once(void *obj)
-{
- struct nilfs_inode_info *ii = obj;
-
- INIT_LIST_HEAD(&ii->i_dirty);
-#ifdef CONFIG_NILFS_XATTR
- init_rwsem(&ii->xattr_sem);
-#endif
- nilfs_btnode_cache_init_once(&ii->i_btnode_cache);
- ii->i_bmap = (struct nilfs_bmap *)&ii->i_bmap_union;
- inode_init_once(&ii->vfs_inode);
-}
-
-static int nilfs_init_inode_cache(void)
-{
- nilfs_inode_cachep = kmem_cache_create("nilfs2_inode_cache",
- sizeof(struct nilfs_inode_info),
- 0, SLAB_RECLAIM_ACCOUNT,
- init_once);
-
- return (nilfs_inode_cachep == NULL) ? -ENOMEM : 0;
-}
-
-static inline void nilfs_destroy_inode_cache(void)
-{
- kmem_cache_destroy(nilfs_inode_cachep);
-}
-
static void nilfs_clear_inode(struct inode *inode)
{
struct nilfs_inode_info *ii = NILFS_I(inode);
int err;
/* nilfs->sem must be locked by the caller. */
- if (sbp[0]->s_magic != NILFS_SUPER_MAGIC) {
- if (sbp[1] && sbp[1]->s_magic == NILFS_SUPER_MAGIC)
+ if (sbp[0]->s_magic != cpu_to_le16(NILFS_SUPER_MAGIC)) {
+ if (sbp[1] && sbp[1]->s_magic == cpu_to_le16(NILFS_SUPER_MAGIC))
nilfs_swap_super_block(nilfs);
else {
printk(KERN_CRIT "NILFS: superblock broke on dev %s\n",
if (nilfs_test_opt(sbi, SNAPSHOT))
seq_printf(seq, ",cp=%llu",
(unsigned long long int)sbi->s_snapshot_cno);
- if (nilfs_test_opt(sbi, ERRORS_RO))
- seq_printf(seq, ",errors=remount-ro");
if (nilfs_test_opt(sbi, ERRORS_PANIC))
seq_printf(seq, ",errors=panic");
+ if (nilfs_test_opt(sbi, ERRORS_CONT))
+ seq_printf(seq, ",errors=continue");
if (nilfs_test_opt(sbi, STRICT_ORDER))
seq_printf(seq, ",order=strict");
if (nilfs_test_opt(sbi, NORECOVERY))
struct nilfs_super_block *sbp)
{
sbi->s_mount_opt =
- NILFS_MOUNT_ERRORS_CONT | NILFS_MOUNT_BARRIER;
+ NILFS_MOUNT_ERRORS_RO | NILFS_MOUNT_BARRIER;
}
static int nilfs_setup_super(struct nilfs_sb_info *sbi)
goto failed_sbi;
}
cno = sbi->s_snapshot_cno;
- } else
- /* Read-only mount */
- sbi->s_snapshot_cno = cno;
+ }
}
err = nilfs_attach_checkpoint(sbi, cno);
struct the_nilfs *nilfs = sbi->s_nilfs;
unsigned long old_sb_flags;
struct nilfs_mount_options old_opts;
- int err;
+ int was_snapshot, err;
lock_kernel();
old_sb_flags = sb->s_flags;
old_opts.mount_opt = sbi->s_mount_opt;
old_opts.snapshot_cno = sbi->s_snapshot_cno;
+ was_snapshot = nilfs_test_opt(sbi, SNAPSHOT);
if (!parse_options(data, sb)) {
err = -EINVAL;
}
sb->s_flags = (sb->s_flags & ~MS_POSIXACL);
- if ((*flags & MS_RDONLY) &&
- sbi->s_snapshot_cno != old_opts.snapshot_cno) {
- printk(KERN_WARNING "NILFS (device %s): couldn't "
- "remount to a different snapshot.\n",
- sb->s_id);
- err = -EINVAL;
- goto restore_opts;
+ err = -EINVAL;
+ if (was_snapshot) {
+ if (!(*flags & MS_RDONLY)) {
+ printk(KERN_ERR "NILFS (device %s): cannot remount "
+ "snapshot read/write.\n",
+ sb->s_id);
+ goto restore_opts;
+ } else if (sbi->s_snapshot_cno != old_opts.snapshot_cno) {
+ printk(KERN_ERR "NILFS (device %s): cannot "
+ "remount to a different snapshot.\n",
+ sb->s_id);
+ goto restore_opts;
+ }
+ } else {
+ if (nilfs_test_opt(sbi, SNAPSHOT)) {
+ printk(KERN_ERR "NILFS (device %s): cannot change "
+ "a regular mount to a snapshot.\n",
+ sb->s_id);
+ goto restore_opts;
+ }
}
if (!nilfs_valid_fs(nilfs)) {
printk(KERN_WARNING "NILFS (device %s): couldn't "
"remount because the filesystem is in an "
"incomplete recovery state.\n", sb->s_id);
- err = -EINVAL;
goto restore_opts;
}
nilfs_detach_segment_constructor(sbi);
sb->s_flags |= MS_RDONLY;
- sbi->s_snapshot_cno = nilfs_last_cno(nilfs);
- /* nilfs_set_opt(sbi, SNAPSHOT); */
-
/*
* Remounting a valid RW partition RDONLY, so set
* the RDONLY flag and then mark the partition as valid again.
* store the current valid flag. (It may have been changed
* by fsck since we originally mounted the partition.)
*/
- if (nilfs->ns_current && nilfs->ns_current != sbi) {
- printk(KERN_WARNING "NILFS (device %s): couldn't "
- "remount because an RW-mount exists.\n",
- sb->s_id);
- err = -EBUSY;
- goto restore_opts;
- }
- if (sbi->s_snapshot_cno != nilfs_last_cno(nilfs)) {
- printk(KERN_WARNING "NILFS (device %s): couldn't "
- "remount because the current RO-mount is not "
- "the latest one.\n",
- sb->s_id);
- err = -EINVAL;
- goto restore_opts;
- }
sb->s_flags &= ~MS_RDONLY;
- nilfs_clear_opt(sbi, SNAPSHOT);
- sbi->s_snapshot_cno = 0;
err = nilfs_attach_segment_constructor(sbi);
if (err)
down_write(&nilfs->ns_sem);
nilfs_setup_super(sbi);
up_write(&nilfs->ns_sem);
-
- nilfs->ns_current = sbi;
}
out:
up_write(&nilfs->ns_super_sem);
{
struct nilfs_super_data sd;
struct super_block *s;
+ fmode_t mode = FMODE_READ;
struct the_nilfs *nilfs;
int err, need_to_close = 1;
- sd.bdev = open_bdev_exclusive(dev_name, flags, fs_type);
+ if (!(flags & MS_RDONLY))
+ mode |= FMODE_WRITE;
+
+ sd.bdev = open_bdev_exclusive(dev_name, mode, fs_type);
if (IS_ERR(sd.bdev))
return PTR_ERR(sd.bdev);
/* New superblock instance created */
s->s_flags = flags;
+ s->s_mode = mode;
strlcpy(s->s_id, bdevname(sd.bdev, b), sizeof(s->s_id));
sb_set_blocksize(s, block_size(sd.bdev));
- err = nilfs_fill_super(s, data, flags & MS_VERBOSE, nilfs);
+ err = nilfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0,
+ nilfs);
if (err)
goto cancel_new;
mutex_unlock(&nilfs->ns_mount_mutex);
put_nilfs(nilfs);
if (need_to_close)
- close_bdev_exclusive(sd.bdev, flags);
+ close_bdev_exclusive(sd.bdev, mode);
simple_set_mnt(mnt, s);
return 0;
mutex_unlock(&nilfs->ns_mount_mutex);
put_nilfs(nilfs);
failed:
- close_bdev_exclusive(sd.bdev, flags);
+ close_bdev_exclusive(sd.bdev, mode);
return err;
put_nilfs(nilfs);
deactivate_locked_super(s);
/*
- * deactivate_super() invokes close_bdev_exclusive().
+ * deactivate_locked_super() invokes close_bdev_exclusive().
* We must finish all post-cleaning before this call;
* put_nilfs() needs the block device.
*/
.fs_flags = FS_REQUIRES_DEV,
};
-static int __init init_nilfs_fs(void)
+static void nilfs_inode_init_once(void *obj)
{
- int err;
-
- err = nilfs_init_inode_cache();
- if (err)
- goto failed;
+ struct nilfs_inode_info *ii = obj;
- err = nilfs_init_transaction_cache();
- if (err)
- goto failed_inode_cache;
+ INIT_LIST_HEAD(&ii->i_dirty);
+#ifdef CONFIG_NILFS_XATTR
+ init_rwsem(&ii->xattr_sem);
+#endif
+ nilfs_btnode_cache_init_once(&ii->i_btnode_cache);
+ ii->i_bmap = (struct nilfs_bmap *)&ii->i_bmap_union;
+ inode_init_once(&ii->vfs_inode);
+}
- err = nilfs_init_segbuf_cache();
- if (err)
- goto failed_transaction_cache;
+static void nilfs_segbuf_init_once(void *obj)
+{
+ memset(obj, 0, sizeof(struct nilfs_segment_buffer));
+}
- err = nilfs_btree_path_cache_init();
- if (err)
- goto failed_segbuf_cache;
+static void nilfs_destroy_cachep(void)
+{
+ if (nilfs_inode_cachep)
+ kmem_cache_destroy(nilfs_inode_cachep);
+ if (nilfs_transaction_cachep)
+ kmem_cache_destroy(nilfs_transaction_cachep);
+ if (nilfs_segbuf_cachep)
+ kmem_cache_destroy(nilfs_segbuf_cachep);
+ if (nilfs_btree_path_cache)
+ kmem_cache_destroy(nilfs_btree_path_cache);
+}
- err = register_filesystem(&nilfs_fs_type);
- if (err)
- goto failed_btree_path_cache;
+static int __init nilfs_init_cachep(void)
+{
+ nilfs_inode_cachep = kmem_cache_create("nilfs2_inode_cache",
+ sizeof(struct nilfs_inode_info), 0,
+ SLAB_RECLAIM_ACCOUNT, nilfs_inode_init_once);
+ if (!nilfs_inode_cachep)
+ goto fail;
+
+ nilfs_transaction_cachep = kmem_cache_create("nilfs2_transaction_cache",
+ sizeof(struct nilfs_transaction_info), 0,
+ SLAB_RECLAIM_ACCOUNT, NULL);
+ if (!nilfs_transaction_cachep)
+ goto fail;
+
+ nilfs_segbuf_cachep = kmem_cache_create("nilfs2_segbuf_cache",
+ sizeof(struct nilfs_segment_buffer), 0,
+ SLAB_RECLAIM_ACCOUNT, nilfs_segbuf_init_once);
+ if (!nilfs_segbuf_cachep)
+ goto fail;
+
+ nilfs_btree_path_cache = kmem_cache_create("nilfs2_btree_path_cache",
+ sizeof(struct nilfs_btree_path) * NILFS_BTREE_LEVEL_MAX,
+ 0, 0, NULL);
+ if (!nilfs_btree_path_cache)
+ goto fail;
return 0;
- failed_btree_path_cache:
- nilfs_btree_path_cache_destroy();
+fail:
+ nilfs_destroy_cachep();
+ return -ENOMEM;
+}
+
+static int __init init_nilfs_fs(void)
+{
+ int err;
- failed_segbuf_cache:
- nilfs_destroy_segbuf_cache();
+ err = nilfs_init_cachep();
+ if (err)
+ goto fail;
- failed_transaction_cache:
- nilfs_destroy_transaction_cache();
+ err = register_filesystem(&nilfs_fs_type);
+ if (err)
+ goto free_cachep;
- failed_inode_cache:
- nilfs_destroy_inode_cache();
+ printk(KERN_INFO "NILFS version 2 loaded\n");
+ return 0;
- failed:
+free_cachep:
+ nilfs_destroy_cachep();
+fail:
return err;
}
static void __exit exit_nilfs_fs(void)
{
- nilfs_destroy_segbuf_cache();
- nilfs_destroy_transaction_cache();
- nilfs_destroy_inode_cache();
- nilfs_btree_path_cache_destroy();
+ nilfs_destroy_cachep();
unregister_filesystem(&nilfs_fs_type);
}
git.openpandora.org / pandora-kernel.git / blobdiff