mirror of https://gitee.com/openkylin/linux.git
Merge branch 'btrfs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
* 'btrfs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: btrfs: take allocation of ->tree_root into open_ctree() btrfs: let ->s_fs_info point to fs_info, not root... btrfs: consolidate failure exits in btrfs_mount() a bit btrfs: make free_fs_info() call ->kill_sb() unconditional btrfs: merge free_fs_info() calls on fill_super failures btrfs: kill pointless reassignment of ->s_fs_info in btrfs_fill_super() btrfs: make open_ctree() return int btrfs: sanitizing ->fs_info, part 5 btrfs: sanitizing ->fs_info, part 4 btrfs: sanitizing ->fs_info, part 3 btrfs: sanitizing ->fs_info, part 2 btrfs: sanitizing ->fs_info, part 1 btrfs: fix a deadlock in btrfs_scan_one_device() btrfs: fix mount/umount race btrfs: get ->kill_sb() of its own btrfs: preparation to fixing mount/umount race
This commit is contained in:
Linus Torvalds
commit
d65773b22b
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@ -2364,7 +2364,7 @@ static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
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return btrfs_item_size(eb, e) - offset;
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}
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static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
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static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
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{
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return sb->s_fs_info;
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}
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@ -1144,7 +1144,6 @@ static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
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root->orphan_item_inserted = 0;
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root->orphan_cleanup_state = 0;
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root->fs_info = fs_info;
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root->objectid = objectid;
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root->last_trans = 0;
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root->highest_objectid = 0;
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@ -1218,6 +1217,14 @@ static int find_and_setup_root(struct btrfs_root *tree_root,
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return 0;
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}
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static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info)
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{
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struct btrfs_root *root = kzalloc(sizeof(*root), GFP_NOFS);
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if (root)
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root->fs_info = fs_info;
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return root;
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}
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static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info)
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{
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@ -1225,7 +1232,7 @@ static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans,
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struct btrfs_root *tree_root = fs_info->tree_root;
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struct extent_buffer *leaf;
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root = kzalloc(sizeof(*root), GFP_NOFS);
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root = btrfs_alloc_root(fs_info);
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if (!root)
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return ERR_PTR(-ENOMEM);
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@ -1320,7 +1327,7 @@ struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root,
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u32 blocksize;
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int ret = 0;
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root = kzalloc(sizeof(*root), GFP_NOFS);
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root = btrfs_alloc_root(fs_info);
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if (!root)
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return ERR_PTR(-ENOMEM);
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if (location->offset == (u64)-1) {
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@ -1876,7 +1883,7 @@ static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root)
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}
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struct btrfs_root *open_ctree(struct super_block *sb,
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int open_ctree(struct super_block *sb,
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struct btrfs_fs_devices *fs_devices,
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char *options)
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{
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@ -1890,8 +1897,8 @@ struct btrfs_root *open_ctree(struct super_block *sb,
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struct btrfs_key location;
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struct buffer_head *bh;
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struct btrfs_super_block *disk_super;
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struct btrfs_root *tree_root = btrfs_sb(sb);
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struct btrfs_fs_info *fs_info = tree_root->fs_info;
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struct btrfs_fs_info *fs_info = btrfs_sb(sb);
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struct btrfs_root *tree_root;
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struct btrfs_root *extent_root;
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struct btrfs_root *csum_root;
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struct btrfs_root *chunk_root;
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@ -1902,16 +1909,14 @@ struct btrfs_root *open_ctree(struct super_block *sb,
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int num_backups_tried = 0;
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int backup_index = 0;
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extent_root = fs_info->extent_root =
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kzalloc(sizeof(struct btrfs_root), GFP_NOFS);
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csum_root = fs_info->csum_root =
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kzalloc(sizeof(struct btrfs_root), GFP_NOFS);
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chunk_root = fs_info->chunk_root =
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kzalloc(sizeof(struct btrfs_root), GFP_NOFS);
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dev_root = fs_info->dev_root =
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kzalloc(sizeof(struct btrfs_root), GFP_NOFS);
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tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info);
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extent_root = fs_info->extent_root = btrfs_alloc_root(fs_info);
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csum_root = fs_info->csum_root = btrfs_alloc_root(fs_info);
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chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info);
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dev_root = fs_info->dev_root = btrfs_alloc_root(fs_info);
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if (!extent_root || !csum_root || !chunk_root || !dev_root) {
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if (!tree_root || !extent_root || !csum_root ||
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!chunk_root || !dev_root) {
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err = -ENOMEM;
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goto fail;
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}
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@ -2389,7 +2394,7 @@ struct btrfs_root *open_ctree(struct super_block *sb,
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btrfs_level_size(tree_root,
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btrfs_super_log_root_level(disk_super));
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log_tree_root = kzalloc(sizeof(struct btrfs_root), GFP_NOFS);
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log_tree_root = btrfs_alloc_root(fs_info);
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if (!log_tree_root) {
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err = -ENOMEM;
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goto fail_trans_kthread;
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@ -2450,11 +2455,11 @@ struct btrfs_root *open_ctree(struct super_block *sb,
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if (err) {
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close_ctree(tree_root);
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return ERR_PTR(err);
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return err;
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}
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}
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return tree_root;
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return 0;
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fail_trans_kthread:
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kthread_stop(fs_info->transaction_kthread);
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@ -2500,8 +2505,7 @@ struct btrfs_root *open_ctree(struct super_block *sb,
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cleanup_srcu_struct(&fs_info->subvol_srcu);
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fail:
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btrfs_close_devices(fs_info->fs_devices);
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free_fs_info(fs_info);
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return ERR_PTR(err);
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return err;
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recovery_tree_root:
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if (!btrfs_test_opt(tree_root, RECOVERY))
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@ -3007,7 +3011,7 @@ int close_ctree(struct btrfs_root *root)
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(atomic_read(&fs_info->defrag_running) == 0));
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/* clear out the rbtree of defraggable inodes */
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btrfs_run_defrag_inodes(root->fs_info);
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btrfs_run_defrag_inodes(fs_info);
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/*
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* Here come 2 situations when btrfs is broken to flip readonly:
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@ -3036,8 +3040,8 @@ int close_ctree(struct btrfs_root *root)
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btrfs_put_block_group_cache(fs_info);
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kthread_stop(root->fs_info->transaction_kthread);
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kthread_stop(root->fs_info->cleaner_kthread);
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kthread_stop(fs_info->transaction_kthread);
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kthread_stop(fs_info->cleaner_kthread);
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fs_info->closing = 2;
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smp_mb();
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@ -3055,14 +3059,14 @@ int close_ctree(struct btrfs_root *root)
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free_extent_buffer(fs_info->extent_root->commit_root);
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free_extent_buffer(fs_info->tree_root->node);
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free_extent_buffer(fs_info->tree_root->commit_root);
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free_extent_buffer(root->fs_info->chunk_root->node);
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free_extent_buffer(root->fs_info->chunk_root->commit_root);
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free_extent_buffer(root->fs_info->dev_root->node);
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free_extent_buffer(root->fs_info->dev_root->commit_root);
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free_extent_buffer(root->fs_info->csum_root->node);
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free_extent_buffer(root->fs_info->csum_root->commit_root);
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free_extent_buffer(fs_info->chunk_root->node);
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free_extent_buffer(fs_info->chunk_root->commit_root);
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free_extent_buffer(fs_info->dev_root->node);
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free_extent_buffer(fs_info->dev_root->commit_root);
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free_extent_buffer(fs_info->csum_root->node);
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free_extent_buffer(fs_info->csum_root->commit_root);
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btrfs_free_block_groups(root->fs_info);
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btrfs_free_block_groups(fs_info);
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del_fs_roots(fs_info);
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@ -3093,8 +3097,6 @@ int close_ctree(struct btrfs_root *root)
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bdi_destroy(&fs_info->bdi);
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cleanup_srcu_struct(&fs_info->subvol_srcu);
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free_fs_info(fs_info);
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return 0;
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}
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@ -46,7 +46,7 @@ struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
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u64 bytenr, u32 blocksize);
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int clean_tree_block(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, struct extent_buffer *buf);
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struct btrfs_root *open_ctree(struct super_block *sb,
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int open_ctree(struct super_block *sb,
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struct btrfs_fs_devices *fs_devices,
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char *options);
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int close_ctree(struct btrfs_root *root);
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@ -67,7 +67,7 @@ static struct dentry *btrfs_get_dentry(struct super_block *sb, u64 objectid,
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u64 root_objectid, u32 generation,
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int check_generation)
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{
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struct btrfs_fs_info *fs_info = btrfs_sb(sb)->fs_info;
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struct btrfs_fs_info *fs_info = btrfs_sb(sb);
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struct btrfs_root *root;
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struct inode *inode;
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struct btrfs_key key;
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@ -286,14 +286,13 @@ static int btrfs_ioctl_getversion(struct file *file, int __user *arg)
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static noinline int btrfs_ioctl_fitrim(struct file *file, void __user *arg)
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{
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struct btrfs_root *root = fdentry(file)->d_sb->s_fs_info;
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struct btrfs_fs_info *fs_info = root->fs_info;
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struct btrfs_fs_info *fs_info = btrfs_sb(fdentry(file)->d_sb);
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struct btrfs_device *device;
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struct request_queue *q;
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struct fstrim_range range;
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u64 minlen = ULLONG_MAX;
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u64 num_devices = 0;
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u64 total_bytes = btrfs_super_total_bytes(root->fs_info->super_copy);
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u64 total_bytes = btrfs_super_total_bytes(fs_info->super_copy);
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int ret;
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if (!capable(CAP_SYS_ADMIN))
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@ -322,7 +321,7 @@ static noinline int btrfs_ioctl_fitrim(struct file *file, void __user *arg)
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range.len = min(range.len, total_bytes - range.start);
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range.minlen = max(range.minlen, minlen);
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ret = btrfs_trim_fs(root, &range);
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ret = btrfs_trim_fs(fs_info->tree_root, &range);
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if (ret < 0)
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return ret;
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141
fs/btrfs/super.c
141
fs/btrfs/super.c
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@ -147,13 +147,13 @@ void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
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static void btrfs_put_super(struct super_block *sb)
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{
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struct btrfs_root *root = btrfs_sb(sb);
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int ret;
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ret = close_ctree(root);
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sb->s_fs_info = NULL;
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(void)ret; /* FIXME: need to fix VFS to return error? */
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(void)close_ctree(btrfs_sb(sb)->tree_root);
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/* FIXME: need to fix VFS to return error? */
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/* AV: return it _where_? ->put_super() can be triggered by any number
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* of async events, up to and including delivery of SIGKILL to the
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* last process that kept it busy. Or segfault in the aforementioned
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* process... Whom would you report that to?
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*/
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}
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enum {
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@ -541,7 +541,8 @@ static int btrfs_parse_early_options(const char *options, fmode_t flags,
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static struct dentry *get_default_root(struct super_block *sb,
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u64 subvol_objectid)
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{
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struct btrfs_root *root = sb->s_fs_info;
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struct btrfs_fs_info *fs_info = btrfs_sb(sb);
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struct btrfs_root *root = fs_info->tree_root;
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struct btrfs_root *new_root;
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struct btrfs_dir_item *di;
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struct btrfs_path *path;
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|
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@ -571,7 +572,7 @@ static struct dentry *get_default_root(struct super_block *sb,
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* will mount by default if we haven't been given a specific subvolume
|
||||
* to mount.
|
||||
*/
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dir_id = btrfs_super_root_dir(root->fs_info->super_copy);
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dir_id = btrfs_super_root_dir(fs_info->super_copy);
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di = btrfs_lookup_dir_item(NULL, root, path, dir_id, "default", 7, 0);
|
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if (IS_ERR(di)) {
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btrfs_free_path(path);
|
||||
|
|
@ -585,7 +586,7 @@ static struct dentry *get_default_root(struct super_block *sb,
|
|||
*/
|
||||
btrfs_free_path(path);
|
||||
dir_id = BTRFS_FIRST_FREE_OBJECTID;
|
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new_root = root->fs_info->fs_root;
|
||||
new_root = fs_info->fs_root;
|
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goto setup_root;
|
||||
}
|
||||
|
||||
|
|
@ -593,7 +594,7 @@ static struct dentry *get_default_root(struct super_block *sb,
|
|||
btrfs_free_path(path);
|
||||
|
||||
find_root:
|
||||
new_root = btrfs_read_fs_root_no_name(root->fs_info, &location);
|
||||
new_root = btrfs_read_fs_root_no_name(fs_info, &location);
|
||||
if (IS_ERR(new_root))
|
||||
return ERR_CAST(new_root);
|
||||
|
||||
|
|
@ -629,7 +630,7 @@ static int btrfs_fill_super(struct super_block *sb,
|
|||
{
|
||||
struct inode *inode;
|
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struct dentry *root_dentry;
|
||||
struct btrfs_root *tree_root;
|
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struct btrfs_fs_info *fs_info = btrfs_sb(sb);
|
||||
struct btrfs_key key;
|
||||
int err;
|
||||
|
||||
|
|
@ -644,18 +645,16 @@ static int btrfs_fill_super(struct super_block *sb,
|
|||
sb->s_flags |= MS_POSIXACL;
|
||||
#endif
|
||||
|
||||
tree_root = open_ctree(sb, fs_devices, (char *)data);
|
||||
|
||||
if (IS_ERR(tree_root)) {
|
||||
err = open_ctree(sb, fs_devices, (char *)data);
|
||||
if (err) {
|
||||
printk("btrfs: open_ctree failed\n");
|
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return PTR_ERR(tree_root);
|
||||
return err;
|
||||
}
|
||||
sb->s_fs_info = tree_root;
|
||||
|
||||
key.objectid = BTRFS_FIRST_FREE_OBJECTID;
|
||||
key.type = BTRFS_INODE_ITEM_KEY;
|
||||
key.offset = 0;
|
||||
inode = btrfs_iget(sb, &key, tree_root->fs_info->fs_root, NULL);
|
||||
inode = btrfs_iget(sb, &key, fs_info->fs_root, NULL);
|
||||
if (IS_ERR(inode)) {
|
||||
err = PTR_ERR(inode);
|
||||
goto fail_close;
|
||||
|
|
@ -672,23 +671,25 @@ static int btrfs_fill_super(struct super_block *sb,
|
|||
|
||||
save_mount_options(sb, data);
|
||||
cleancache_init_fs(sb);
|
||||
sb->s_flags |= MS_ACTIVE;
|
||||
return 0;
|
||||
|
||||
fail_close:
|
||||
close_ctree(tree_root);
|
||||
close_ctree(fs_info->tree_root);
|
||||
return err;
|
||||
}
|
||||
|
||||
int btrfs_sync_fs(struct super_block *sb, int wait)
|
||||
{
|
||||
struct btrfs_trans_handle *trans;
|
||||
struct btrfs_root *root = btrfs_sb(sb);
|
||||
struct btrfs_fs_info *fs_info = btrfs_sb(sb);
|
||||
struct btrfs_root *root = fs_info->tree_root;
|
||||
int ret;
|
||||
|
||||
trace_btrfs_sync_fs(wait);
|
||||
|
||||
if (!wait) {
|
||||
filemap_flush(root->fs_info->btree_inode->i_mapping);
|
||||
filemap_flush(fs_info->btree_inode->i_mapping);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
@ -704,8 +705,8 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
|
|||
|
||||
static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
|
||||
{
|
||||
struct btrfs_root *root = btrfs_sb(dentry->d_sb);
|
||||
struct btrfs_fs_info *info = root->fs_info;
|
||||
struct btrfs_fs_info *info = btrfs_sb(dentry->d_sb);
|
||||
struct btrfs_root *root = info->tree_root;
|
||||
char *compress_type;
|
||||
|
||||
if (btrfs_test_opt(root, DEGRADED))
|
||||
|
|
@ -770,23 +771,18 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
|
|||
|
||||
static int btrfs_test_super(struct super_block *s, void *data)
|
||||
{
|
||||
struct btrfs_root *test_root = data;
|
||||
struct btrfs_root *root = btrfs_sb(s);
|
||||
struct btrfs_fs_info *p = data;
|
||||
struct btrfs_fs_info *fs_info = btrfs_sb(s);
|
||||
|
||||
/*
|
||||
* If this super block is going away, return false as it
|
||||
* can't match as an existing super block.
|
||||
*/
|
||||
if (!atomic_read(&s->s_active))
|
||||
return 0;
|
||||
return root->fs_info->fs_devices == test_root->fs_info->fs_devices;
|
||||
return fs_info->fs_devices == p->fs_devices;
|
||||
}
|
||||
|
||||
static int btrfs_set_super(struct super_block *s, void *data)
|
||||
{
|
||||
int err = set_anon_super(s, data);
|
||||
if (!err)
|
||||
s->s_fs_info = data;
|
||||
|
||||
return set_anon_super(s, data);
|
||||
return err;
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -946,12 +942,6 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
|
|||
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_fs_info;
|
||||
}
|
||||
fs_info->tree_root->fs_info = fs_info;
|
||||
fs_info->fs_devices = fs_devices;
|
||||
|
||||
fs_info->super_copy = kzalloc(BTRFS_SUPER_INFO_SIZE, GFP_NOFS);
|
||||
|
|
@ -971,43 +961,30 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
|
|||
}
|
||||
|
||||
bdev = fs_devices->latest_bdev;
|
||||
s = sget(fs_type, btrfs_test_super, btrfs_set_super,
|
||||
fs_info->tree_root);
|
||||
s = sget(fs_type, btrfs_test_super, btrfs_set_super, fs_info);
|
||||
if (IS_ERR(s)) {
|
||||
error = PTR_ERR(s);
|
||||
goto error_close_devices;
|
||||
}
|
||||
|
||||
if (s->s_root) {
|
||||
if ((flags ^ s->s_flags) & MS_RDONLY) {
|
||||
deactivate_locked_super(s);
|
||||
error = -EBUSY;
|
||||
goto error_close_devices;
|
||||
}
|
||||
|
||||
btrfs_close_devices(fs_devices);
|
||||
free_fs_info(fs_info);
|
||||
if ((flags ^ s->s_flags) & MS_RDONLY)
|
||||
error = -EBUSY;
|
||||
} else {
|
||||
char b[BDEVNAME_SIZE];
|
||||
|
||||
s->s_flags = flags | MS_NOSEC;
|
||||
strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id));
|
||||
btrfs_sb(s)->fs_info->bdev_holder = fs_type;
|
||||
btrfs_sb(s)->bdev_holder = fs_type;
|
||||
error = btrfs_fill_super(s, fs_devices, data,
|
||||
flags & MS_SILENT ? 1 : 0);
|
||||
if (error) {
|
||||
deactivate_locked_super(s);
|
||||
return ERR_PTR(error);
|
||||
}
|
||||
|
||||
s->s_flags |= MS_ACTIVE;
|
||||
}
|
||||
|
||||
root = get_default_root(s, subvol_objectid);
|
||||
if (IS_ERR(root)) {
|
||||
root = !error ? get_default_root(s, subvol_objectid) : ERR_PTR(error);
|
||||
if (IS_ERR(root))
|
||||
deactivate_locked_super(s);
|
||||
return root;
|
||||
}
|
||||
|
||||
return root;
|
||||
|
||||
|
|
@ -1020,7 +997,8 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
|
|||
|
||||
static int btrfs_remount(struct super_block *sb, int *flags, char *data)
|
||||
{
|
||||
struct btrfs_root *root = btrfs_sb(sb);
|
||||
struct btrfs_fs_info *fs_info = btrfs_sb(sb);
|
||||
struct btrfs_root *root = fs_info->tree_root;
|
||||
int ret;
|
||||
|
||||
ret = btrfs_parse_options(root, data);
|
||||
|
|
@ -1036,13 +1014,13 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
|
|||
ret = btrfs_commit_super(root);
|
||||
WARN_ON(ret);
|
||||
} else {
|
||||
if (root->fs_info->fs_devices->rw_devices == 0)
|
||||
if (fs_info->fs_devices->rw_devices == 0)
|
||||
return -EACCES;
|
||||
|
||||
if (btrfs_super_log_root(root->fs_info->super_copy) != 0)
|
||||
if (btrfs_super_log_root(fs_info->super_copy) != 0)
|
||||
return -EINVAL;
|
||||
|
||||
ret = btrfs_cleanup_fs_roots(root->fs_info);
|
||||
ret = btrfs_cleanup_fs_roots(fs_info);
|
||||
WARN_ON(ret);
|
||||
|
||||
/* recover relocation */
|
||||
|
|
@ -1211,18 +1189,18 @@ static int btrfs_calc_avail_data_space(struct btrfs_root *root, u64 *free_bytes)
|
|||
|
||||
static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf)
|
||||
{
|
||||
struct btrfs_root *root = btrfs_sb(dentry->d_sb);
|
||||
struct btrfs_super_block *disk_super = root->fs_info->super_copy;
|
||||
struct list_head *head = &root->fs_info->space_info;
|
||||
struct btrfs_fs_info *fs_info = btrfs_sb(dentry->d_sb);
|
||||
struct btrfs_super_block *disk_super = fs_info->super_copy;
|
||||
struct list_head *head = &fs_info->space_info;
|
||||
struct btrfs_space_info *found;
|
||||
u64 total_used = 0;
|
||||
u64 total_free_data = 0;
|
||||
int bits = dentry->d_sb->s_blocksize_bits;
|
||||
__be32 *fsid = (__be32 *)root->fs_info->fsid;
|
||||
__be32 *fsid = (__be32 *)fs_info->fsid;
|
||||
int ret;
|
||||
|
||||
/* holding chunk_muext to avoid allocating new chunks */
|
||||
mutex_lock(&root->fs_info->chunk_mutex);
|
||||
mutex_lock(&fs_info->chunk_mutex);
|
||||
rcu_read_lock();
|
||||
list_for_each_entry_rcu(found, head, list) {
|
||||
if (found->flags & BTRFS_BLOCK_GROUP_DATA) {
|
||||
|
|
@ -1241,14 +1219,14 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf)
|
|||
buf->f_bsize = dentry->d_sb->s_blocksize;
|
||||
buf->f_type = BTRFS_SUPER_MAGIC;
|
||||
buf->f_bavail = total_free_data;
|
||||
ret = btrfs_calc_avail_data_space(root, &total_free_data);
|
||||
ret = btrfs_calc_avail_data_space(fs_info->tree_root, &total_free_data);
|
||||
if (ret) {
|
||||
mutex_unlock(&root->fs_info->chunk_mutex);
|
||||
mutex_unlock(&fs_info->chunk_mutex);
|
||||
return ret;
|
||||
}
|
||||
buf->f_bavail += total_free_data;
|
||||
buf->f_bavail = buf->f_bavail >> bits;
|
||||
mutex_unlock(&root->fs_info->chunk_mutex);
|
||||
mutex_unlock(&fs_info->chunk_mutex);
|
||||
|
||||
/* We treat it as constant endianness (it doesn't matter _which_)
|
||||
because we want the fsid to come out the same whether mounted
|
||||
|
|
@ -1262,11 +1240,18 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static void btrfs_kill_super(struct super_block *sb)
|
||||
{
|
||||
struct btrfs_fs_info *fs_info = btrfs_sb(sb);
|
||||
kill_anon_super(sb);
|
||||
free_fs_info(fs_info);
|
||||
}
|
||||
|
||||
static struct file_system_type btrfs_fs_type = {
|
||||
.owner = THIS_MODULE,
|
||||
.name = "btrfs",
|
||||
.mount = btrfs_mount,
|
||||
.kill_sb = kill_anon_super,
|
||||
.kill_sb = btrfs_kill_super,
|
||||
.fs_flags = FS_REQUIRES_DEV,
|
||||
};
|
||||
|
||||
|
|
@ -1300,17 +1285,17 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
|
|||
|
||||
static int btrfs_freeze(struct super_block *sb)
|
||||
{
|
||||
struct btrfs_root *root = btrfs_sb(sb);
|
||||
mutex_lock(&root->fs_info->transaction_kthread_mutex);
|
||||
mutex_lock(&root->fs_info->cleaner_mutex);
|
||||
struct btrfs_fs_info *fs_info = btrfs_sb(sb);
|
||||
mutex_lock(&fs_info->transaction_kthread_mutex);
|
||||
mutex_lock(&fs_info->cleaner_mutex);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int btrfs_unfreeze(struct super_block *sb)
|
||||
{
|
||||
struct btrfs_root *root = btrfs_sb(sb);
|
||||
mutex_unlock(&root->fs_info->cleaner_mutex);
|
||||
mutex_unlock(&root->fs_info->transaction_kthread_mutex);
|
||||
struct btrfs_fs_info *fs_info = btrfs_sb(sb);
|
||||
mutex_unlock(&fs_info->cleaner_mutex);
|
||||
mutex_unlock(&fs_info->transaction_kthread_mutex);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -708,8 +708,6 @@ int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
|
|||
u64 devid;
|
||||
u64 transid;
|
||||
|
||||
mutex_lock(&uuid_mutex);
|
||||
|
||||
flags |= FMODE_EXCL;
|
||||
bdev = blkdev_get_by_path(path, flags, holder);
|
||||
|
||||
|
|
@ -718,6 +716,7 @@ int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
|
|||
goto error;
|
||||
}
|
||||
|
||||
mutex_lock(&uuid_mutex);
|
||||
ret = set_blocksize(bdev, 4096);
|
||||
if (ret)
|
||||
goto error_close;
|
||||
|
|
@ -739,9 +738,9 @@ int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
|
|||
|
||||
brelse(bh);
|
||||
error_close:
|
||||
mutex_unlock(&uuid_mutex);
|
||||
blkdev_put(bdev, flags);
|
||||
error:
|
||||
mutex_unlock(&uuid_mutex);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue