@@ -3774,12 +3774,16 @@ commit_trans:
data_sinfo->flags, bytes, 1);
return -ENOSPC;
}
+ ret = btrfs_qgroup_reserve(root, bytes);
+ if (ret)
+ goto out;
data_sinfo->bytes_may_use += bytes;
trace_btrfs_space_reservation(root->fs_info, "space_info",
data_sinfo->flags, bytes, 1);
+out:
spin_unlock(&data_sinfo->lock);
- return 0;
+ return ret;
}
/*
@@ -3796,6 +3800,7 @@ void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes)
data_sinfo = root->fs_info->data_sinfo;
spin_lock(&data_sinfo->lock);
WARN_ON(data_sinfo->bytes_may_use < bytes);
+ btrfs_qgroup_free(root, bytes);
data_sinfo->bytes_may_use -= bytes;
trace_btrfs_space_reservation(root->fs_info, "space_info",
data_sinfo->flags, bytes, 0);
@@ -5191,8 +5196,7 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
spin_unlock(&BTRFS_I(inode)->lock);
if (root->fs_info->quota_enabled) {
- ret = btrfs_qgroup_reserve(root, num_bytes +
- nr_extents * root->nodesize);
+ ret = btrfs_qgroup_reserve(root, nr_extents * root->nodesize);
if (ret)
goto out_fail;
}
@@ -5200,8 +5204,7 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
ret = reserve_metadata_bytes(root, block_rsv, to_reserve, flush);
if (unlikely(ret)) {
if (root->fs_info->quota_enabled)
- btrfs_qgroup_free(root, num_bytes +
- nr_extents * root->nodesize);
+ btrfs_qgroup_free(root, nr_extents * root->nodesize);
goto out_fail;
}
@@ -5319,8 +5322,7 @@ void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes)
trace_btrfs_space_reservation(root->fs_info, "delalloc",
btrfs_ino(inode), to_free, 0);
if (root->fs_info->quota_enabled) {
- btrfs_qgroup_free(root, num_bytes +
- dropped * root->nodesize);
+ btrfs_qgroup_free(root, dropped * root->nodesize);
}
btrfs_block_rsv_release(root, &root->fs_info->delalloc_block_rsv,
@@ -2527,7 +2527,6 @@ static long btrfs_fallocate(struct file *file, int mode,
{
struct inode *inode = file_inode(file);
struct extent_state *cached_state = NULL;
- struct btrfs_root *root = BTRFS_I(inode)->root;
u64 cur_offset;
u64 last_byte;
u64 alloc_start;
@@ -2555,11 +2554,6 @@ static long btrfs_fallocate(struct file *file, int mode,
ret = btrfs_check_data_free_space(inode, alloc_end - alloc_start);
if (ret)
return ret;
- if (root->fs_info->quota_enabled) {
- ret = btrfs_qgroup_reserve(root, alloc_end - alloc_start);
- if (ret)
- goto out_reserve_fail;
- }
mutex_lock(&inode->i_mutex);
ret = inode_newsize_ok(inode, alloc_end);
@@ -2677,9 +2671,6 @@ static long btrfs_fallocate(struct file *file, int mode,
&cached_state, GFP_NOFS);
out:
mutex_unlock(&inode->i_mutex);
- if (root->fs_info->quota_enabled)
- btrfs_qgroup_free(root, alloc_end - alloc_start);
-out_reserve_fail:
/* Let go of our reservation. */
btrfs_free_reserved_data_space(inode, alloc_end - alloc_start);
return ret;
Currenly, in data writing, ->reserved is accounted in fill_delalloc(), but ->may_use is released in clear_bit_hook() which is called by btrfs_finish_ordered_io(). That's too late, that said, between fill_delalloc() and btrfs_finish_ordered_io(), the data is doublely accounted by qgroup. It will cause some unexpected -EDQUOT. Example: # btrfs quota enable /root/btrfs-auto-test/ # btrfs subvolume create /root/btrfs-auto-test//sub Create subvolume '/root/btrfs-auto-test/sub' # btrfs qgroup limit 1G /root/btrfs-auto-test//sub dd if=/dev/zero of=/root/btrfs-auto-test//sub/file bs=1024 count=1500000 dd: error writing '/root/btrfs-auto-test//sub/file': Disk quota exceeded 681353+0 records in 681352+0 records out 697704448 bytes (698 MB) copied, 8.15563 s, 85.5 MB/s It's (698 MB) when we got an -EDQUOT, but we limit it by 1G. This patch move the btrfs_qgroup_reserve/free() for data from btrfs_delalloc_reserve/release_metadata() to btrfs_check_data_free_space() and btrfs_free_reserved_data_space(). Then the accounter in qgroup will be updated at the same time with the accounter in space_info updated. In this way, the unexpected -EDQUOT will be killed. Reported-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com> Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> --- fs/btrfs/extent-tree.c | 16 +++++++++------- fs/btrfs/file.c | 9 --------- 2 files changed, 9 insertions(+), 16 deletions(-)