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| author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-08-09 03:14:06 +0400 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-08-09 09:57:56 +0400 |
| commit | dbe6a5ff4fa78bdfa983458c338831d91b35f315 (patch) | |
| tree | 9cb566091b008512cdee731cb5502794c9d06c1a /fs | |
| parent | c2d715d144af7209d035d0fe0b20a7a591c22c21 (diff) | |
| download | linux-dbe6a5ff4fa78bdfa983458c338831d91b35f315.tar.xz | |
f2fs: fix the use of XATTR_NODE_OFFSET
This patch fixes the use of XATTR_NODE_OFFSET.
o The offset should not use several MSB bits which are used by marking node
blocks.
o IS_DNODE should handle XATTR_NODE_OFFSET to avoid potential abnormality
during the fsync call.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/f2fs/f2fs.h | 12 | ||||
| -rw-r--r-- | fs/f2fs/node.h | 4 |
2 files changed, 11 insertions, 5 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index d8e386ceb0cd..eb8c45b65fe5 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -135,11 +135,13 @@ static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i) /* * For INODE and NODE manager */ -#define XATTR_NODE_OFFSET (-1) /* - * store xattrs to one node block per - * file keeping -1 as its node offset to - * distinguish from index node blocks. - */ +/* + * XATTR_NODE_OFFSET stores xattrs to one node block per file keeping -1 + * as its node offset to distinguish from index node blocks. + * But some bits are used to mark the node block. + */ +#define XATTR_NODE_OFFSET ((((unsigned int)-1) << OFFSET_BIT_SHIFT) \ + >> OFFSET_BIT_SHIFT) enum { ALLOC_NODE, /* allocate a new node page if needed */ LOOKUP_NODE, /* look up a node without readahead */ diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h index 87349c4ea0ef..3496bb3e15dc 100644 --- a/fs/f2fs/node.h +++ b/fs/f2fs/node.h @@ -229,6 +229,10 @@ static inline block_t next_blkaddr_of_node(struct page *node_page) static inline bool IS_DNODE(struct page *node_page) { unsigned int ofs = ofs_of_node(node_page); + + if (ofs == XATTR_NODE_OFFSET) + return false; + if (ofs == 3 || ofs == 4 + NIDS_PER_BLOCK || ofs == 5 + 2 * NIDS_PER_BLOCK) return false; |