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authorLi Zefan <lizf@cn.fujitsu.com>2010-10-25 15:12:50 +0800
committerLi Zefan <lizf@cn.fujitsu.com>2010-12-22 23:15:48 +0800
commit1a419d85a76853d7d04e9b6280a80e96770bf3e3 (patch)
tree01535c5571208561af5d475eaa151e1c2f936f57 /fs/btrfs
parenta6fa6fae40ec336c7df6155255ae64ebef43a8bc (diff)
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>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/ioctl.c19
-rw-r--r--fs/btrfs/ioctl.h9
2 files changed, 26 insertions, 2 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 8cb86d4d763..b6985d33eed 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 c344d12c646..24d0f462824 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 {