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Diffstat (limited to 'fs/btrfs/ioctl.c')
-rw-r--r--fs/btrfs/ioctl.c101
1 files changed, 78 insertions, 23 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index d8b54715c2de..205809200714 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -425,22 +425,37 @@ static noinline int create_subvol(struct btrfs_root *root,
key.offset = (u64)-1;
new_root = btrfs_read_fs_root_no_name(root->fs_info, &key);
- BUG_ON(IS_ERR(new_root));
+ if (IS_ERR(new_root)) {
+ btrfs_abort_transaction(trans, root, PTR_ERR(new_root));
+ ret = PTR_ERR(new_root);
+ goto fail;
+ }
btrfs_record_root_in_trans(trans, new_root);
ret = btrfs_create_subvol_root(trans, new_root, new_dirid);
+ if (ret) {
+ /* We potentially lose an unused inode item here */
+ btrfs_abort_transaction(trans, root, ret);
+ goto fail;
+ }
+
/*
* insert the directory item
*/
ret = btrfs_set_inode_index(dir, &index);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto fail;
+ }
ret = btrfs_insert_dir_item(trans, root,
name, namelen, dir, &key,
BTRFS_FT_DIR, index);
- if (ret)
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
goto fail;
+ }
btrfs_i_size_write(dir, dir->i_size + namelen * 2);
ret = btrfs_update_inode(trans, root, dir);
@@ -797,9 +812,9 @@ static int should_defrag_range(struct inode *inode, u64 start, u64 len,
if (!em) {
/* get the big lock and read metadata off disk */
- lock_extent(io_tree, start, start + len - 1, GFP_NOFS);
+ lock_extent(io_tree, start, start + len - 1);
em = btrfs_get_extent(inode, NULL, 0, start, len, 0);
- unlock_extent(io_tree, start, start + len - 1, GFP_NOFS);
+ unlock_extent(io_tree, start, start + len - 1);
if (IS_ERR(em))
return 0;
@@ -887,10 +902,10 @@ again:
page_start = page_offset(page);
page_end = page_start + PAGE_CACHE_SIZE - 1;
while (1) {
- lock_extent(tree, page_start, page_end, GFP_NOFS);
+ lock_extent(tree, page_start, page_end);
ordered = btrfs_lookup_ordered_extent(inode,
page_start);
- unlock_extent(tree, page_start, page_end, GFP_NOFS);
+ unlock_extent(tree, page_start, page_end);
if (!ordered)
break;
@@ -946,8 +961,7 @@ again:
page_end = page_offset(pages[i_done - 1]) + PAGE_CACHE_SIZE;
lock_extent_bits(&BTRFS_I(inode)->io_tree,
- page_start, page_end - 1, 0, &cached_state,
- GFP_NOFS);
+ page_start, page_end - 1, 0, &cached_state);
clear_extent_bit(&BTRFS_I(inode)->io_tree, page_start,
page_end - 1, EXTENT_DIRTY | EXTENT_DELALLOC |
EXTENT_DO_ACCOUNTING, 0, 0, &cached_state,
@@ -1966,7 +1980,11 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file,
dest->root_key.objectid,
dentry->d_name.name,
dentry->d_name.len);
- BUG_ON(ret);
+ if (ret) {
+ err = ret;
+ btrfs_abort_transaction(trans, root, ret);
+ goto out_end_trans;
+ }
btrfs_record_root_in_trans(trans, dest);
@@ -1979,11 +1997,16 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file,
ret = btrfs_insert_orphan_item(trans,
root->fs_info->tree_root,
dest->root_key.objectid);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ err = ret;
+ goto out_end_trans;
+ }
}
-
+out_end_trans:
ret = btrfs_end_transaction(trans, root);
- BUG_ON(ret);
+ if (ret && !err)
+ err = ret;
inode->i_flags |= S_DEAD;
out_up_write:
up_write(&root->fs_info->subvol_sem);
@@ -2326,13 +2349,13 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
another, and lock file content */
while (1) {
struct btrfs_ordered_extent *ordered;
- lock_extent(&BTRFS_I(src)->io_tree, off, off+len, GFP_NOFS);
+ lock_extent(&BTRFS_I(src)->io_tree, off, off+len);
ordered = btrfs_lookup_first_ordered_extent(src, off+len);
if (!ordered &&
!test_range_bit(&BTRFS_I(src)->io_tree, off, off+len,
EXTENT_DELALLOC, 0, NULL))
break;
- unlock_extent(&BTRFS_I(src)->io_tree, off, off+len, GFP_NOFS);
+ unlock_extent(&BTRFS_I(src)->io_tree, off, off+len);
if (ordered)
btrfs_put_ordered_extent(ordered);
btrfs_wait_ordered_range(src, off, len);
@@ -2447,11 +2470,21 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
new_key.offset,
new_key.offset + datal,
&hint_byte, 1);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root,
+ ret);
+ btrfs_end_transaction(trans, root);
+ goto out;
+ }
ret = btrfs_insert_empty_item(trans, root, path,
&new_key, size);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root,
+ ret);
+ btrfs_end_transaction(trans, root);
+ goto out;
+ }
leaf = path->nodes[0];
slot = path->slots[0];
@@ -2478,7 +2511,15 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
btrfs_ino(inode),
new_key.offset - datao,
0);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans,
+ root,
+ ret);
+ btrfs_end_transaction(trans,
+ root);
+ goto out;
+
+ }
}
} else if (type == BTRFS_FILE_EXTENT_INLINE) {
u64 skip = 0;
@@ -2503,11 +2544,21 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
new_key.offset,
new_key.offset + datal,
&hint_byte, 1);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root,
+ ret);
+ btrfs_end_transaction(trans, root);
+ goto out;
+ }
ret = btrfs_insert_empty_item(trans, root, path,
&new_key, size);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_abort_transaction(trans, root,
+ ret);
+ btrfs_end_transaction(trans, root);
+ goto out;
+ }
if (skip) {
u32 start =
@@ -2541,8 +2592,12 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
btrfs_i_size_write(inode, endoff);
ret = btrfs_update_inode(trans, root, inode);
- BUG_ON(ret);
- btrfs_end_transaction(trans, root);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ btrfs_end_transaction(trans, root);
+ goto out;
+ }
+ ret = btrfs_end_transaction(trans, root);
}
next:
btrfs_release_path(path);
@@ -2551,7 +2606,7 @@ next:
ret = 0;
out:
btrfs_release_path(path);
- unlock_extent(&BTRFS_I(src)->io_tree, off, off+len, GFP_NOFS);
+ unlock_extent(&BTRFS_I(src)->io_tree, off, off+len);
out_unlock:
mutex_unlock(&src->i_mutex);
mutex_unlock(&inode->i_mutex);
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-13 00:29:34 +0000