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Date: Tue, 31 Jul 2007 16:55:25 -0700 From: akpm@...ux-foundation.org To: cmm@...ibm.com, linux-ext4@...r.kernel.org, stable@...nel.org, yanzheng@...n.com, mm-commits@...r.kernel.org Subject: - ext4_ext_put_in_cache-uses-__u32-to-receive-physical.patch removed from -mm tree The patch titled "ext4_ext_put_in_cache" uses __u32 to receive physical block number has been removed from the -mm tree. Its filename was ext4_ext_put_in_cache-uses-__u32-to-receive-physical.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ Subject: "ext4_ext_put_in_cache" uses __u32 to receive physical block number From: Mingming Cao <cmm@...ibm.com> Yan Zheng wrote: > I think I found a bug in ext4/extents.c, "ext4_ext_put_in_cache" uses > "__u32" to receive physical block number. "ext4_ext_put_in_cache" is > used in "ext4_ext_get_blocks", it sets ext4 inode's extent cache > according most recently tree lookup (higher 16 bits of saved physical > block number are always zero). when serving a mapping request, > "ext4_ext_get_blocks" first check whether the logical block is in > inode's extent cache. if the logical block is in the cache and the > cached region isn't a gap, "ext4_ext_get_blocks" gets physical block > number by using cached region's physical block number and offset in > the cached region. as described above, "ext4_ext_get_blocks" may > return wrong result when there are physical block numbers bigger than > 0xffffffff. > You are right. Thanks for reporting this! Signed-off-by: Mingming Cao <cmm@...ibm.com> Cc: Yan Zheng <yanzheng@...n.com> Cc: <stable@...nel.org> Cc: <linux-ext4@...r.kernel.org> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org> --- fs/ext4/extents.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff -puN fs/ext4/extents.c~ext4_ext_put_in_cache-uses-__u32-to-receive-physical fs/ext4/extents.c --- a/fs/ext4/extents.c~ext4_ext_put_in_cache-uses-__u32-to-receive-physical +++ a/fs/ext4/extents.c @@ -1544,7 +1544,7 @@ int ext4_ext_walk_space(struct inode *in static void ext4_ext_put_in_cache(struct inode *inode, __u32 block, - __u32 len, __u32 start, int type) + __u32 len, ext4_fsblk_t start, int type) { struct ext4_ext_cache *cex; BUG_ON(len == 0); _ Patches currently in -mm which might be from cmm@...ibm.com are origin.patch convert-ill-defined-log2-to-ilog2.patch ext2-reservations.patch fix-for-ext2-reservation.patch ext2-balloc-use-io_error-label.patch - To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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