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| author | Mingming Cao <cmm@us.ibm.com> | 2006-10-11 01:21:05 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-11 11:14:16 -0700 |
| commit | 3a5b2ecdd1fa63a8f25bd769223bc1c2564ce45d (patch) | |
| tree | dc80fdde9ed01e77ef0ed6fdef7573d303bd07db /include/linux/ext4_fs.h | |
| parent | a86c61812637c7dd0c57e29880cffd477b62f2e7 (diff) | |
| download | lwn-3a5b2ecdd1fa63a8f25bd769223bc1c2564ce45d.tar.gz lwn-3a5b2ecdd1fa63a8f25bd769223bc1c2564ce45d.zip | |
[PATCH] ext4: switch fsblk to sector_t
Redefine ext3 in-kernel filesystem block type (ext3_fsblk_t) from unsigned
long to sector_t, to allow kernel to handle >32 bit ext3 blocks.
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/ext4_fs.h')
| -rw-r--r-- | include/linux/ext4_fs.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h index b61181aadcbb..e952c6db9690 100644 --- a/include/linux/ext4_fs.h +++ b/include/linux/ext4_fs.h @@ -17,6 +17,7 @@ #define _LINUX_EXT4_FS_H #include <linux/types.h> +#include <linux/blkdev.h> #include <linux/magic.h> /* @@ -750,6 +751,27 @@ ext4_group_first_block_no(struct super_block *sb, unsigned long group_no) #define ERR_BAD_DX_DIR -75000 /* + * This function calculate the block group number and offset, + * given a block number + */ + +static inline void ext4_get_group_no_and_offset(struct super_block * sb, + ext4_fsblk_t blocknr, unsigned long* blockgrpp, + ext4_grpblk_t *offsetp) +{ + struct ext4_super_block *es = EXT4_SB(sb)->s_es; + ext4_grpblk_t offset; + + blocknr = blocknr - le32_to_cpu(es->s_first_data_block); + offset = sector_div(blocknr, EXT4_BLOCKS_PER_GROUP(sb)); + if (offsetp) + *offsetp = offset; + if (blockgrpp) + *blockgrpp = blocknr; + +} + +/* * Function prototypes */ @@ -762,6 +784,10 @@ ext4_group_first_block_no(struct super_block *sb, unsigned long group_no) # define NORET_AND noreturn, /* balloc.c */ +extern unsigned int ext4_block_group(struct super_block *sb, + ext4_fsblk_t blocknr); +extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb, + ext4_fsblk_t blocknr); extern int ext4_bg_has_super(struct super_block *sb, int group); extern unsigned long ext4_bg_num_gdb(struct super_block *sb, int group); extern ext4_fsblk_t ext4_new_block (handle_t *handle, struct inode *inode, |