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author | David Sterba <dsterba@suse.com> | 2017-02-13 13:42:29 +0100 |
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committer | David Sterba <dsterba@suse.com> | 2017-02-17 12:03:49 +0100 |
commit | 53d3235995b3f87754a42de24d707f158c1b3b40 (patch) | |
tree | a98d862301bdf55fe271c4ebea2fb4825d36b915 /fs/btrfs/qgroup.c | |
parent | 9d037933861805799db4edfd075412a39e2549f4 (diff) | |
download | linux-stable-53d3235995b3f87754a42de24d707f158c1b3b40.tar.gz linux-stable-53d3235995b3f87754a42de24d707f158c1b3b40.tar.bz2 linux-stable-53d3235995b3f87754a42de24d707f158c1b3b40.zip |
btrfs: embed extent_changeset::range_changed to the structure
We can embed range_changed to the extent changeset to address following
problems:
- no need to allocate ulist dynamically, we also get rid of the GFP_NOFS
for free
- fix lack of allocation failure checking in btrfs_qgroup_reserve_data
The stack consuption where extent_changeset is used slightly increases:
before: 16
after: 16 - 8 (for pointer) + 32 (sizeof ulist) = 40
Which is bearable.
Reviewed-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/qgroup.c')
-rw-r--r-- | fs/btrfs/qgroup.c | 24 |
1 files changed, 9 insertions, 15 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index b0174431ec8a..627126daf25b 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -2828,7 +2828,7 @@ int btrfs_qgroup_reserve_data(struct inode *inode, u64 start, u64 len) return 0; changeset.bytes_changed = 0; - changeset.range_changed = ulist_alloc(GFP_NOFS); + ulist_init(&changeset.range_changed); ret = set_record_extent_bits(&BTRFS_I(inode)->io_tree, start, start + len -1, EXTENT_QGROUP_RESERVED, &changeset); trace_btrfs_qgroup_reserve_data(inode, start, len, @@ -2840,17 +2840,17 @@ int btrfs_qgroup_reserve_data(struct inode *inode, u64 start, u64 len) if (ret < 0) goto cleanup; - ulist_free(changeset.range_changed); + ulist_fini(&changeset.range_changed); return ret; cleanup: /* cleanup already reserved ranges */ ULIST_ITER_INIT(&uiter); - while ((unode = ulist_next(changeset.range_changed, &uiter))) + while ((unode = ulist_next(&changeset.range_changed, &uiter))) clear_extent_bit(&BTRFS_I(inode)->io_tree, unode->val, unode->aux, EXTENT_QGROUP_RESERVED, 0, 0, NULL, GFP_NOFS); - ulist_free(changeset.range_changed); + ulist_fini(&changeset.range_changed); return ret; } @@ -2862,10 +2862,7 @@ static int __btrfs_qgroup_release_data(struct inode *inode, u64 start, u64 len, int ret; changeset.bytes_changed = 0; - changeset.range_changed = ulist_alloc(GFP_NOFS); - if (!changeset.range_changed) - return -ENOMEM; - + ulist_init(&changeset.range_changed); ret = clear_record_extent_bits(&BTRFS_I(inode)->io_tree, start, start + len -1, EXTENT_QGROUP_RESERVED, &changeset); if (ret < 0) @@ -2878,7 +2875,7 @@ static int __btrfs_qgroup_release_data(struct inode *inode, u64 start, u64 len, trace_btrfs_qgroup_release_data(inode, start, len, changeset.bytes_changed, trace_op); out: - ulist_free(changeset.range_changed); + ulist_fini(&changeset.range_changed); return ret; } @@ -2976,22 +2973,19 @@ void btrfs_qgroup_check_reserved_leak(struct inode *inode) int ret; changeset.bytes_changed = 0; - changeset.range_changed = ulist_alloc(GFP_NOFS); - if (WARN_ON(!changeset.range_changed)) - return; - + ulist_init(&changeset.range_changed); ret = clear_record_extent_bits(&BTRFS_I(inode)->io_tree, 0, (u64)-1, EXTENT_QGROUP_RESERVED, &changeset); WARN_ON(ret < 0); if (WARN_ON(changeset.bytes_changed)) { ULIST_ITER_INIT(&iter); - while ((unode = ulist_next(changeset.range_changed, &iter))) { + while ((unode = ulist_next(&changeset.range_changed, &iter))) { btrfs_warn(BTRFS_I(inode)->root->fs_info, "leaking qgroup reserved space, ino: %lu, start: %llu, end: %llu", inode->i_ino, unode->val, unode->aux); } qgroup_free(BTRFS_I(inode)->root, changeset.bytes_changed); } - ulist_free(changeset.range_changed); + ulist_fini(&changeset.range_changed); } |