diff options
| author | David Sterba <dsterba@suse.com> | 2017-07-17 20:41:31 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-08-16 17:12:05 +0300 |
| commit | eec63c65dcbeb14b59c95159eb225b1fc2310806 (patch) | |
| tree | f2c54de48515e48eea07a5ccd0ead6c990fe3a8f /fs | |
| parent | b52aa8c93e1fec97fcd87345b13f532f0dee8239 (diff) | |
| download | linux-eec63c65dcbeb14b59c95159eb225b1fc2310806.tar.xz | |
btrfs: separate defrag and property compression
Add new value for compression to distinguish between defrag and
property. Previously, a single variable was used and this caused clashes
when the per-file 'compression' was set and a defrag -c was called.
The property-compression is loaded when the file is open, defrag will
overwrite the same variable and reset to 0 (ie. NONE) at when the file
defragmentaion is finished. That's considered a usability bug.
Now we won't touch the property value, use the defrag-compression. The
precedence of defrag is higher than for property (and whole-filesystem).
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/btrfs_inode.h | 5 | ||||
| -rw-r--r-- | fs/btrfs/inode.c | 8 | ||||
| -rw-r--r-- | fs/btrfs/ioctl.c | 4 |
3 files changed, 14 insertions, 3 deletions
diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h index fa118036a84e..eccadb5f62a5 100644 --- a/fs/btrfs/btrfs_inode.h +++ b/fs/btrfs/btrfs_inode.h @@ -182,6 +182,11 @@ struct btrfs_inode { * Cached values of inode properties */ unsigned prop_compress; /* per-file compression algorithm */ + /* + * Force compression on the file using the defrag ioctl, could be + * different from prop_compress and takes precedence if set + */ + unsigned defrag_compress; struct btrfs_delayed_node *delayed_node; diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index c60a6d692bc1..1e8eb5e8551c 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -402,6 +402,9 @@ static inline int inode_need_compress(struct inode *inode, u64 start, u64 end) /* bad compression ratios */ if (BTRFS_I(inode)->flags & BTRFS_INODE_NOCOMPRESS) return 0; + /* defrag ioctl */ + if (BTRFS_I(inode)->defrag_compress) + return 1; if (btrfs_test_opt(fs_info, COMPRESS) || BTRFS_I(inode)->flags & BTRFS_INODE_COMPRESS || BTRFS_I(inode)->prop_compress) @@ -511,7 +514,9 @@ again: goto cont; } - if (BTRFS_I(inode)->prop_compress) + if (BTRFS_I(inode)->defrag_compress) + compress_type = BTRFS_I(inode)->defrag_compress; + else if (BTRFS_I(inode)->prop_compress) compress_type = BTRFS_I(inode)->prop_compress; /* @@ -9434,6 +9439,7 @@ struct inode *btrfs_alloc_inode(struct super_block *sb) ei->runtime_flags = 0; ei->prop_compress = BTRFS_COMPRESS_NONE; + ei->defrag_compress = BTRFS_COMPRESS_NONE; ei->delayed_node = NULL; diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index e1c15a2ac785..1d6603dc1d59 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -1371,7 +1371,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file, inode_lock(inode); if (range->flags & BTRFS_DEFRAG_RANGE_COMPRESS) - BTRFS_I(inode)->prop_compress = compress_type; + BTRFS_I(inode)->defrag_compress = compress_type; ret = cluster_pages_for_defrag(inode, pages, i, cluster); if (ret < 0) { inode_unlock(inode); @@ -1442,7 +1442,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file, out_ra: if (range->flags & BTRFS_DEFRAG_RANGE_COMPRESS) { inode_lock(inode); - BTRFS_I(inode)->prop_compress = BTRFS_COMPRESS_NONE; + BTRFS_I(inode)->defrag_compress = BTRFS_COMPRESS_NONE; inode_unlock(inode); } if (!file) |