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inode.c: only update the icache for ext2_inode
We only read the cache when:
bufsize == sizeof(struct ext2_inode)
then we should only update the cache in the same condition, otherwise
there would be errors, for example:
cache[0]: cached ino 14 when bufsize = 128 by ext2fs_write_inode_full()
cache[1]: cached ino 14 when bufsize = 156 by ext2fs_read_inode_full()
Then update the cache:
cache[0]: cached ino 15 when bufsize = 156 by ext2fs_read_inode_full()
Then the ino 14 would hit the cache[1] when bufsize = 128 (but it was
cached by bufsize = 156), so there would be errors.
Note: the upstream has changed the icache lot, so this patch is
inappropriate for the upstream, we can drop this patch when we update
the package.
Upstream-Status: [Inappropriate]
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
---
lib/ext2fs/inode.c | 20 ++++++++++++--------
1 file changed, 12 insertions(+), 8 deletions(-)
diff --git a/lib/ext2fs/inode.c b/lib/ext2fs/inode.c
--- a/lib/ext2fs/inode.c
+++ b/lib/ext2fs/inode.c
@@ -612,10 +612,12 @@ errcode_t ext2fs_read_inode_full(ext2_filsys fs, ext2_ino_t ino,
#endif
/* Update the inode cache */
- fs->icache->cache_last = (fs->icache->cache_last + 1) %
- fs->icache->cache_size;
- fs->icache->cache[fs->icache->cache_last].ino = ino;
- fs->icache->cache[fs->icache->cache_last].inode = *inode;
+ if (bufsize == sizeof(struct ext2_inode)) {
+ fs->icache->cache_last = (fs->icache->cache_last + 1) %
+ fs->icache->cache_size;
+ fs->icache->cache[fs->icache->cache_last].ino = ino;
+ fs->icache->cache[fs->icache->cache_last].inode = *inode;
+ }
return 0;
}
@@ -648,10 +650,12 @@ errcode_t ext2fs_write_inode_full(ext2_filsys fs, ext2_ino_t ino,
/* Check to see if the inode cache needs to be updated */
if (fs->icache) {
- for (i=0; i < fs->icache->cache_size; i++) {
- if (fs->icache->cache[i].ino == ino) {
- fs->icache->cache[i].inode = *inode;
- break;
+ if (bufsize == sizeof(struct ext2_inode)) {
+ for (i=0; i < fs->icache->cache_size; i++) {
+ if (fs->icache->cache[i].ino == ino) {
+ fs->icache->cache[i].inode = *inode;
+ break;
+ }
}
}
} else {
--
1.8.1.2
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