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authorFrederic Leroy <fredo@starox.org>2013-06-26 18:11:25 +0200
committerTom Rini <trini@ti.com>2013-07-15 17:06:13 -0400
commit04735e9c5578dd4f3584be5454b9779e8e5c2af9 (patch)
tree5641d35f98ffda64ff900a8356639eeb88f320a5 /fs/ext4/ext4_journal.c
parent0eb33ad253026d5a773854dd42b2a56937678aa9 (diff)
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Fix ext2/ext4 filesystem accesses beyond 2TiB
With CONFIG_SYS_64BIT_LBA, lbaint_t gets defined as a 64-bit type, which is required to represent block numbers for storage devices that exceed 2TiB (the block size usually is 512B), e.g. recent hard drives We now use lbaint_t for partition offset to reflect the lbaint_t change, and access partitions beyond or crossing the 2.1TiB limit. This required changes to signature of ext4fs_devread(), and type of all variables relatives to block sector. ext2/ext4 fs uses logical block represented by a 32 bit value. Logical block is a multiple of device block sector. To avoid overflow problem when calling ext4fs_devread(), we need to cast the sector parameter. Signed-off-by: Frédéric Leroy <fredo@starox.org>
Diffstat (limited to 'fs/ext4/ext4_journal.c')
-rw-r--r--fs/ext4/ext4_journal.c19
1 files changed, 12 insertions, 7 deletions
diff --git a/fs/ext4/ext4_journal.c b/fs/ext4/ext4_journal.c
index 81aa5fc0f8..a540367a70 100644
--- a/fs/ext4/ext4_journal.c
+++ b/fs/ext4/ext4_journal.c
@@ -360,7 +360,8 @@ void recover_transaction(int prev_desc_logical_no)
(struct ext2_inode *)&inode_journal);
blknr = read_allocated_block((struct ext2_inode *)
&inode_journal, i);
- ext4fs_devread(blknr * fs->sect_perblk, 0, fs->blksz, temp_buff);
+ ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0, fs->blksz,
+ temp_buff);
p_jdb = (char *)temp_buff;
jdb = (struct journal_header_t *) temp_buff;
ofs = sizeof(struct journal_header_t);
@@ -384,7 +385,7 @@ void recover_transaction(int prev_desc_logical_no)
continue;
}
blknr = read_allocated_block(&inode_journal, i);
- ext4fs_devread(blknr * fs->sect_perblk, 0,
+ ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0,
fs->blksz, metadata_buff);
put_ext4((uint64_t)(be32_to_cpu(tag->block) * fs->blksz),
metadata_buff, (uint32_t) fs->blksz);
@@ -431,7 +432,8 @@ int ext4fs_check_journal_state(int recovery_flag)
ext4fs_read_inode(ext4fs_root, EXT2_JOURNAL_INO, &inode_journal);
blknr = read_allocated_block(&inode_journal, EXT2_JOURNAL_SUPERBLOCK);
- ext4fs_devread(blknr * fs->sect_perblk, 0, fs->blksz, temp_buff);
+ ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0, fs->blksz,
+ temp_buff);
jsb = (struct journal_superblock_t *) temp_buff;
if (fs->sb->feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) {
@@ -455,7 +457,7 @@ int ext4fs_check_journal_state(int recovery_flag)
while (1) {
blknr = read_allocated_block(&inode_journal, i);
memset(temp_buff1, '\0', fs->blksz);
- ext4fs_devread(blknr * fs->sect_perblk,
+ ext4fs_devread((lbaint_t)blknr * fs->sect_perblk,
0, fs->blksz, temp_buff1);
jdb = (struct journal_header_t *) temp_buff1;
@@ -574,7 +576,8 @@ static void update_descriptor_block(long int blknr)
ext4fs_read_inode(ext4fs_root, EXT2_JOURNAL_INO, &inode_journal);
jsb_blknr = read_allocated_block(&inode_journal,
EXT2_JOURNAL_SUPERBLOCK);
- ext4fs_devread(jsb_blknr * fs->sect_perblk, 0, fs->blksz, temp_buff);
+ ext4fs_devread((lbaint_t)jsb_blknr * fs->sect_perblk, 0, fs->blksz,
+ temp_buff);
jsb = (struct journal_superblock_t *) temp_buff;
jdb.h_blocktype = cpu_to_be32(EXT3_JOURNAL_DESCRIPTOR_BLOCK);
@@ -621,10 +624,12 @@ static void update_commit_block(long int blknr)
if (!temp_buff)
return;
- ext4fs_read_inode(ext4fs_root, EXT2_JOURNAL_INO, &inode_journal);
+ ext4fs_read_inode(ext4fs_root, EXT2_JOURNAL_INO,
+ &inode_journal);
jsb_blknr = read_allocated_block(&inode_journal,
EXT2_JOURNAL_SUPERBLOCK);
- ext4fs_devread(jsb_blknr * fs->sect_perblk, 0, fs->blksz, temp_buff);
+ ext4fs_devread((lbaint_t)jsb_blknr * fs->sect_perblk, 0, fs->blksz,
+ temp_buff);
jsb = (struct journal_superblock_t *) temp_buff;
jdb.h_blocktype = cpu_to_be32(EXT3_JOURNAL_COMMIT_BLOCK);
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