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f2fs: fix the use of XATTR_NODE_OFFSET

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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>
This commit is contained in:
Jaegeuk Kim 2013-08-09 08:14:06 +09:00
parent c2d715d144
commit dbe6a5ff4f
2 changed files with 11 additions and 5 deletions
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12
fs/f2fs/f2fs.h
View file

@ -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 */

4
fs/f2fs/node.h
View file

@ -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;