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Merge branch 'mount-fixes' of git://github.com/idryomov/btrfs-unstable into integration

This commit is contained in:
Chris Mason 2011-11-10 20:42:53 -05:00
parent 2115133f8b 04d21a244f
commit f7d572188b
2 changed files with 43 additions and 46 deletions
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42
fs/btrfs/disk-io.c
View File

@ -1890,31 +1890,32 @@ struct btrfs_root *open_ctree(struct super_block *sb,
u64 features;
struct btrfs_key location;
struct buffer_head *bh;
struct btrfs_root *extent_root = kzalloc(sizeof(struct btrfs_root),
GFP_NOFS);
struct btrfs_root *csum_root = kzalloc(sizeof(struct btrfs_root),
GFP_NOFS);
struct btrfs_super_block *disk_super;
struct btrfs_root *tree_root = btrfs_sb(sb);
struct btrfs_fs_info *fs_info = NULL;
struct btrfs_root *chunk_root = kzalloc(sizeof(struct btrfs_root),
GFP_NOFS);
struct btrfs_root *dev_root = kzalloc(sizeof(struct btrfs_root),
GFP_NOFS);
struct btrfs_fs_info *fs_info = tree_root->fs_info;
struct btrfs_root *extent_root;
struct btrfs_root *csum_root;
struct btrfs_root *chunk_root;
struct btrfs_root *dev_root;
struct btrfs_root *log_tree_root;
int ret;
int err = -EINVAL;
int num_backups_tried = 0;
int backup_index = 0;
struct btrfs_super_block *disk_super;
extent_root = fs_info->extent_root =
kzalloc(sizeof(struct btrfs_root), GFP_NOFS);
csum_root = fs_info->csum_root =
kzalloc(sizeof(struct btrfs_root), GFP_NOFS);
chunk_root = fs_info->chunk_root =
kzalloc(sizeof(struct btrfs_root), GFP_NOFS);
dev_root = fs_info->dev_root =
kzalloc(sizeof(struct btrfs_root), GFP_NOFS);
if (!extent_root || !tree_root || !tree_root->fs_info ||
!chunk_root || !dev_root || !csum_root) {
if (!extent_root || !csum_root || !chunk_root || !dev_root) {
err = -ENOMEM;
goto fail;
}
fs_info = tree_root->fs_info;
ret = init_srcu_struct(&fs_info->subvol_srcu);
if (ret) {
@ -1954,12 +1955,6 @@ struct btrfs_root *open_ctree(struct super_block *sb,
mutex_init(&fs_info->reloc_mutex);
init_completion(&fs_info->kobj_unregister);
fs_info->tree_root = tree_root;
fs_info->extent_root = extent_root;
fs_info->csum_root = csum_root;
fs_info->chunk_root = chunk_root;
fs_info->dev_root = dev_root;
fs_info->fs_devices = fs_devices;
INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots);
INIT_LIST_HEAD(&fs_info->space_info);
btrfs_mapping_init(&fs_info->mapping_tree);
@ -2465,21 +2460,20 @@ fail_sb_buffer:
btrfs_stop_workers(&fs_info->caching_workers);
fail_alloc:
fail_iput:
btrfs_mapping_tree_free(&fs_info->mapping_tree);
invalidate_inode_pages2(fs_info->btree_inode->i_mapping);
iput(fs_info->btree_inode);
btrfs_close_devices(fs_info->fs_devices);
btrfs_mapping_tree_free(&fs_info->mapping_tree);
fail_bdi:
bdi_destroy(&fs_info->bdi);
fail_srcu:
cleanup_srcu_struct(&fs_info->subvol_srcu);
fail:
btrfs_close_devices(fs_info->fs_devices);
free_fs_info(fs_info);
return ERR_PTR(err);
recovery_tree_root:
if (!btrfs_test_opt(tree_root, RECOVERY))
goto fail_tree_roots;

47
fs/btrfs/super.c
View File

@ -448,6 +448,7 @@ static int btrfs_parse_early_options(const char *options, fmode_t flags,
token = match_token(p, tokens, args);
switch (token) {
case Opt_subvol:
kfree(*subvol_name);
*subvol_name = match_strdup(&args[0]);
break;
case Opt_subvolid:
@ -890,7 +891,6 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
struct super_block *s;
struct dentry *root;
struct btrfs_fs_devices *fs_devices = NULL;
struct btrfs_root *tree_root = NULL;
struct btrfs_fs_info *fs_info = NULL;
fmode_t mode = FMODE_READ;
char *subvol_name = NULL;
@ -904,8 +904,10 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
error = btrfs_parse_early_options(data, mode, fs_type,
&subvol_name, &subvol_objectid,
&subvol_rootid, &fs_devices);
if (error)
if (error) {
kfree(subvol_name);
return ERR_PTR(error);
}
if (subvol_name) {
root = mount_subvol(subvol_name, flags, device_name, data);
@ -917,15 +919,6 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
if (error)
return ERR_PTR(error);
error = btrfs_open_devices(fs_devices, mode, fs_type);
if (error)
return ERR_PTR(error);
if (!(flags & MS_RDONLY) && fs_devices->rw_devices == 0) {
error = -EACCES;
goto error_close_devices;
}
/*
* Setup a dummy root and fs_info for test/set super. This is because
* we don't actually fill this stuff out until open_ctree, but we need
@ -933,28 +926,36 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
* then open_ctree will properly initialize everything later.
*/
fs_info = kzalloc(sizeof(struct btrfs_fs_info), GFP_NOFS);
if (!fs_info) {
if (!fs_info)
return ERR_PTR(-ENOMEM);
fs_info->tree_root = kzalloc(sizeof(struct btrfs_root), GFP_NOFS);
if (!fs_info->tree_root) {
error = -ENOMEM;
goto error_close_devices;
goto error_fs_info;
}
tree_root = kzalloc(sizeof(struct btrfs_root), GFP_NOFS);
if (!tree_root) {
error = -ENOMEM;
goto error_close_devices;
}
fs_info->tree_root = tree_root;
fs_info->tree_root->fs_info = fs_info;
fs_info->fs_devices = fs_devices;
tree_root->fs_info = fs_info;
fs_info->super_copy = kzalloc(BTRFS_SUPER_INFO_SIZE, GFP_NOFS);
fs_info->super_for_commit = kzalloc(BTRFS_SUPER_INFO_SIZE, GFP_NOFS);
if (!fs_info->super_copy || !fs_info->super_for_commit) {
error = -ENOMEM;
goto error_fs_info;
}
error = btrfs_open_devices(fs_devices, mode, fs_type);
if (error)
goto error_fs_info;
if (!(flags & MS_RDONLY) && fs_devices->rw_devices == 0) {
error = -EACCES;
goto error_close_devices;
}
bdev = fs_devices->latest_bdev;
s = sget(fs_type, btrfs_test_super, btrfs_set_super, tree_root);
s = sget(fs_type, btrfs_test_super, btrfs_set_super,
fs_info->tree_root);
if (IS_ERR(s)) {
error = PTR_ERR(s);
goto error_close_devices;
@ -963,7 +964,8 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
if (s->s_root) {
if ((flags ^ s->s_flags) & MS_RDONLY) {
deactivate_locked_super(s);
return ERR_PTR(-EBUSY);
error = -EBUSY;
goto error_close_devices;
}
btrfs_close_devices(fs_devices);
@ -994,6 +996,7 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
error_close_devices:
btrfs_close_devices(fs_devices);
error_fs_info:
free_fs_info(fs_info);
return ERR_PTR(error);
}