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| author | Li Zefan <lizf@cn.fujitsu.com> | 2010-10-25 09:12:50 +0200 |
|---|---|---|
| committer | Li Zefan <lizf@cn.fujitsu.com> | 2010-12-22 16:15:48 +0100 |
| commit | 1a419d85a76853d7d04e9b6280a80e96770bf3e3 (patch) | |
| tree | 01535c5571208561af5d475eaa151e1c2f936f57 | |
| parent | btrfs: Add lzo compression support (diff) | |
| download | linux-1a419d85a76853d7d04e9b6280a80e96770bf3e3.tar.xz linux-1a419d85a76853d7d04e9b6280a80e96770bf3e3.zip | |
btrfs: Allow to specify compress method when defrag
Update defrag ioctl, so one can choose lzo or zlib when turning
on compression in defrag operation.
Changelog:
v1 -> v2
- Add incompability flag.
- Fix to check invalid compress type.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
| -rw-r--r-- | fs/btrfs/ioctl.c | 19 | ||||
| -rw-r--r-- | fs/btrfs/ioctl.h | 9 |
2 files changed, 26 insertions, 2 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 8cb86d4d763c..b6985d33eede 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -638,9 +638,11 @@ static int btrfs_defrag_file(struct file *file, struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; struct btrfs_ordered_extent *ordered; struct page *page; + struct btrfs_super_block *disk_super; unsigned long last_index; unsigned long ra_pages = root->fs_info->bdi.ra_pages; unsigned long total_read = 0; + u64 features; u64 page_start; u64 page_end; u64 last_len = 0; @@ -648,6 +650,14 @@ static int btrfs_defrag_file(struct file *file, u64 defrag_end = 0; unsigned long i; int ret; + int compress_type = BTRFS_COMPRESS_ZLIB; + + if (range->flags & BTRFS_DEFRAG_RANGE_COMPRESS) { + if (range->compress_type > BTRFS_COMPRESS_TYPES) + return -EINVAL; + if (range->compress_type) + compress_type = range->compress_type; + } if (inode->i_size == 0) return 0; @@ -683,7 +693,7 @@ static int btrfs_defrag_file(struct file *file, total_read++; mutex_lock(&inode->i_mutex); if (range->flags & BTRFS_DEFRAG_RANGE_COMPRESS) - BTRFS_I(inode)->force_compress = BTRFS_COMPRESS_ZLIB; + BTRFS_I(inode)->force_compress = compress_type; ret = btrfs_delalloc_reserve_space(inode, PAGE_CACHE_SIZE); if (ret) @@ -785,6 +795,13 @@ loop_unlock: mutex_unlock(&inode->i_mutex); } + disk_super = &root->fs_info->super_copy; + features = btrfs_super_incompat_flags(disk_super); + if (range->compress_type == BTRFS_COMPRESS_LZO) { + features |= BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO; + btrfs_set_super_incompat_flags(disk_super, features); + } + return 0; err_reservations: diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h index c344d12c646b..24d0f4628240 100644 --- a/fs/btrfs/ioctl.h +++ b/fs/btrfs/ioctl.h @@ -133,8 +133,15 @@ struct btrfs_ioctl_defrag_range_args { */ __u32 extent_thresh; + /* + * which compression method to use if turning on compression + * for this defrag operation. If unspecified, zlib will + * be used + */ + __u32 compress_type; + /* spare for later */ - __u32 unused[5]; + __u32 unused[4]; }; struct btrfs_ioctl_space_info { |