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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2007-10-16 18:38:25 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2007-10-17 18:50:03 -0400 |
| commit | b377611d11aba5251264b487dd4485ddb80260f1 (patch) | |
| tree | a92c547ee2e426dacfb7248c146ae7a974d55544 | |
| parent | 308ba3ece7db82e8b8d32d6962e4d12e09c5aa41 (diff) | |
| download | linux-b377611d11aba5251264b487dd4485ddb80260f1.tar.gz linux-b377611d11aba5251264b487dd4485ddb80260f1.tar.bz2 linux-b377611d11aba5251264b487dd4485ddb80260f1.zip | |
ext4: Convert ext4_extent.ee_start to ext4_extent.ee_start_lo
Convert ext4_extent.ee_start to ext4_extent.ee_start_lo
This helps in finding BUGs due to direct partial access of
these split 48 bit values
Also fix direct partial access in ext4 code
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
| -rw-r--r-- | fs/ext4/extents.c | 8 | ||||
| -rw-r--r-- | include/linux/ext4_fs_extents.h | 2 |
2 files changed, 4 insertions, 6 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 2be404f68a76..c03056aafcdb 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -52,7 +52,7 @@ static ext4_fsblk_t ext_pblock(struct ext4_extent *ex) { ext4_fsblk_t block; - block = le32_to_cpu(ex->ee_start); + block = le32_to_cpu(ex->ee_start_lo); block |= ((ext4_fsblk_t) le16_to_cpu(ex->ee_start_hi) << 31) << 1; return block; } @@ -77,7 +77,7 @@ static ext4_fsblk_t idx_pblock(struct ext4_extent_idx *ix) */ static void ext4_ext_store_pblock(struct ext4_extent *ex, ext4_fsblk_t pb) { - ex->ee_start = cpu_to_le32((unsigned long) (pb & 0xffffffff)); + ex->ee_start_lo = cpu_to_le32((unsigned long) (pb & 0xffffffff)); ex->ee_start_hi = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff); } @@ -1409,8 +1409,7 @@ has_space: eh->eh_entries = cpu_to_le16(le16_to_cpu(eh->eh_entries)+1); nearex = path[depth].p_ext; nearex->ee_block = newext->ee_block; - nearex->ee_start = newext->ee_start; - nearex->ee_start_hi = newext->ee_start_hi; + ext4_ext_store_pblock(nearex, ext_pblock(newext)); nearex->ee_len = newext->ee_len; merge: @@ -2177,7 +2176,6 @@ int ext4_ext_convert_to_initialized(handle_t *handle, struct inode *inode, } /* ex2: iblock to iblock + maxblocks-1 : initialised */ ex2->ee_block = cpu_to_le32(iblock); - ex2->ee_start = cpu_to_le32(newblock); ext4_ext_store_pblock(ex2, newblock); ex2->ee_len = cpu_to_le16(allocated); if (ex2 != ex) diff --git a/include/linux/ext4_fs_extents.h b/include/linux/ext4_fs_extents.h index 81406f3655d4..cb2dfbbc969a 100644 --- a/include/linux/ext4_fs_extents.h +++ b/include/linux/ext4_fs_extents.h @@ -74,7 +74,7 @@ struct ext4_extent { __le32 ee_block; /* first logical block extent covers */ __le16 ee_len; /* number of blocks covered by extent */ __le16 ee_start_hi; /* high 16 bits of physical block */ - __le32 ee_start; /* low 32 bits of physical block */ + __le32 ee_start_lo; /* low 32 bits of physical block */ }; /* |