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author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-08-14 16:57:27 +0400 |
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committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-08-26 15:15:23 +0400 |
commit | 65985d935ddd5657c66a8bb3ae9752ed842549b8 (patch) | |
tree | 5eea77933c96f3007cdc29b6fa06c313737003f6 /fs/f2fs/xattr.h | |
parent | 4f16fb0f9be3f5f9d1254ff6d7bf54b23fb65f4a (diff) | |
download | linux-65985d935ddd5657c66a8bb3ae9752ed842549b8.tar.xz |
f2fs: support the inline xattrs
0. modified inode structure
--------------------------------------
metadata (e.g., i_mtime, i_ctime, etc)
--------------------------------------
direct pointers [0 ~ 873]
inline xattrs (200 bytes by default)
indirect pointers [0 ~ 4]
--------------------------------------
node footer
--------------------------------------
1. setxattr flow
- read_all_xattrs copies all the xattrs from inline and xattr node block.
- handle xattr entries
- write_all_xattrs copies modified xattrs into inline and xattr node block.
2. getxattr flow
- read_all_xattrs copies all the xattrs from inline and xattr node block.
- check target entries
3. Usage
# mount -t f2fs -o inline_xattr $DEV $MNT
Once mounted with the inline_xattr option, f2fs marks all the newly created
files to reserve an amount of inline xattr space explicitly inside the inode
block. Without the mount option, f2fs will not touch any existing files and
newly created files as well.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs/xattr.h')
-rw-r--r-- | fs/f2fs/xattr.h | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/fs/f2fs/xattr.h b/fs/f2fs/xattr.h index c3ec042707d4..02a08fb88a15 100644 --- a/fs/f2fs/xattr.h +++ b/fs/f2fs/xattr.h @@ -69,16 +69,16 @@ struct f2fs_xattr_entry { !IS_XATTR_LAST_ENTRY(entry);\ entry = XATTR_NEXT_ENTRY(entry)) -#define MIN_OFFSET XATTR_ALIGN(PAGE_SIZE - \ - sizeof(struct node_footer) - \ - sizeof(__u32)) +#define MIN_OFFSET(i) XATTR_ALIGN(inline_xattr_size(i) + PAGE_SIZE - \ + sizeof(struct node_footer) - sizeof(__u32)) -#define MAX_VALUE_LEN (MIN_OFFSET - sizeof(struct f2fs_xattr_header) - \ - sizeof(struct f2fs_xattr_entry)) +#define MAX_VALUE_LEN(i) (MIN_OFFSET(i) - \ + sizeof(struct f2fs_xattr_header) - \ + sizeof(struct f2fs_xattr_entry)) /* * On-disk structure of f2fs_xattr - * We use only 1 block for xattr. + * We use inline xattrs space + 1 block for xattr. * * +--------------------+ * | f2fs_xattr_header | |