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author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2008-01-29 07:58:27 +0300 |
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committer | Theodore Ts'o <tytso@mit.edu> | 2008-01-29 07:58:27 +0300 |
commit | 725d26d3f09ccb5bac4b4293096b985a312a0d67 (patch) | |
tree | 1c49a07da252832fc6842c88a2359e8cd43af636 /include/linux | |
parent | a72d7f834e1afa08421938d7eb06bd8e56b0e58c (diff) | |
download | linux-725d26d3f09ccb5bac4b4293096b985a312a0d67.tar.xz |
ext4: Introduce ext4_lblk_t
This patch adds a new data type ext4_lblk_t to represent
the logical file blocks.
This is the preparatory patch to support large files in ext4
The follow up patch with convert the ext4_inode i_blocks to
represent the number of blocks in file system block size. This
changes makes it possible to have a block number 2**32 -1 which
will result in overflow if the block number is represented by
signed long. This patch convert all the block number to type
ext4_lblk_t which is typedef to __u32
Also remove dead code ext4_ext_walk_space
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Diffstat (limited to 'include/linux')
-rw-r--r-- | include/linux/ext4_fs.h | 29 | ||||
-rw-r--r-- | include/linux/ext4_fs_extents.h | 19 | ||||
-rw-r--r-- | include/linux/ext4_fs_i.h | 9 |
3 files changed, 27 insertions, 30 deletions
diff --git a/include/linux/ext4_fs.h b/include/linux/ext4_fs.h index fb31c1aba989..5e2da0974d16 100644 --- a/include/linux/ext4_fs.h +++ b/include/linux/ext4_fs.h @@ -935,11 +935,14 @@ extern unsigned long ext4_count_free (struct buffer_head *, unsigned); /* inode.c */ int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode, struct buffer_head *bh, ext4_fsblk_t blocknr); -struct buffer_head * ext4_getblk (handle_t *, struct inode *, long, int, int *); -struct buffer_head * ext4_bread (handle_t *, struct inode *, int, int, int *); +struct buffer_head *ext4_getblk(handle_t *, struct inode *, + ext4_lblk_t, int, int *); +struct buffer_head *ext4_bread(handle_t *, struct inode *, + ext4_lblk_t, int, int *); int ext4_get_blocks_handle(handle_t *handle, struct inode *inode, - sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result, - int create, int extend_disksize); + ext4_lblk_t iblock, unsigned long maxblocks, + struct buffer_head *bh_result, + int create, int extend_disksize); extern void ext4_read_inode (struct inode *); extern int ext4_write_inode (struct inode *, int); @@ -1068,7 +1071,7 @@ extern const struct inode_operations ext4_fast_symlink_inode_operations; extern int ext4_ext_tree_init(handle_t *handle, struct inode *); extern int ext4_ext_writepage_trans_blocks(struct inode *, int); extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, - ext4_fsblk_t iblock, + ext4_lblk_t iblock, unsigned long max_blocks, struct buffer_head *bh_result, int create, int extend_disksize); extern void ext4_ext_truncate(struct inode *, struct page *); @@ -1081,11 +1084,17 @@ ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, sector_t block, unsigned long max_blocks, struct buffer_head *bh, int create, int extend_disksize) { - if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) - return ext4_ext_get_blocks(handle, inode, block, max_blocks, - bh, create, extend_disksize); - return ext4_get_blocks_handle(handle, inode, block, max_blocks, bh, - create, extend_disksize); + int retval; + if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) { + retval = ext4_ext_get_blocks(handle, inode, + (ext4_lblk_t)block, max_blocks, + bh, create, extend_disksize); + } else { + retval = ext4_get_blocks_handle(handle, inode, + (ext4_lblk_t)block, max_blocks, + bh, create, extend_disksize); + } + return retval; } diff --git a/include/linux/ext4_fs_extents.h b/include/linux/ext4_fs_extents.h index d2045a26195d..023683b9d883 100644 --- a/include/linux/ext4_fs_extents.h +++ b/include/linux/ext4_fs_extents.h @@ -124,20 +124,6 @@ struct ext4_ext_path { #define EXT4_EXT_CACHE_GAP 1 #define EXT4_EXT_CACHE_EXTENT 2 -/* - * to be called by ext4_ext_walk_space() - * negative retcode - error - * positive retcode - signal for ext4_ext_walk_space(), see below - * callback must return valid extent (passed or newly created) - */ -typedef int (*ext_prepare_callback)(struct inode *, struct ext4_ext_path *, - struct ext4_ext_cache *, - void *); - -#define EXT_CONTINUE 0 -#define EXT_BREAK 1 -#define EXT_REPEAT 2 - #define EXT_MAX_BLOCK 0xffffffff @@ -233,8 +219,7 @@ extern int ext4_ext_try_to_merge(struct inode *inode, struct ext4_extent *); extern unsigned int ext4_ext_check_overlap(struct inode *, struct ext4_extent *, struct ext4_ext_path *); extern int ext4_ext_insert_extent(handle_t *, struct inode *, struct ext4_ext_path *, struct ext4_extent *); -extern int ext4_ext_walk_space(struct inode *, unsigned long, unsigned long, ext_prepare_callback, void *); -extern struct ext4_ext_path * ext4_ext_find_extent(struct inode *, int, struct ext4_ext_path *); - +extern struct ext4_ext_path *ext4_ext_find_extent(struct inode *, ext4_lblk_t, + struct ext4_ext_path *); #endif /* _LINUX_EXT4_EXTENTS */ diff --git a/include/linux/ext4_fs_i.h b/include/linux/ext4_fs_i.h index 86ddfe2089f3..6c610b67b047 100644 --- a/include/linux/ext4_fs_i.h +++ b/include/linux/ext4_fs_i.h @@ -27,6 +27,9 @@ typedef int ext4_grpblk_t; /* data type for filesystem-wide blocks number */ typedef unsigned long long ext4_fsblk_t; +/* data type for file logical block number */ +typedef __u32 ext4_lblk_t; + struct ext4_reserve_window { ext4_fsblk_t _rsv_start; /* First byte reserved */ ext4_fsblk_t _rsv_end; /* Last byte reserved or 0 */ @@ -48,7 +51,7 @@ struct ext4_block_alloc_info { * most-recently-allocated block in this file. * We use this for detecting linearly ascending allocation requests. */ - __u32 last_alloc_logical_block; + ext4_lblk_t last_alloc_logical_block; /* * Was i_next_alloc_goal in ext4_inode_info * is the *physical* companion to i_next_alloc_block. @@ -67,7 +70,7 @@ struct ext4_block_alloc_info { */ struct ext4_ext_cache { ext4_fsblk_t ec_start; - __u32 ec_block; + ext4_lblk_t ec_block; __u32 ec_len; /* must be 32bit to return holes */ __u32 ec_type; }; @@ -95,7 +98,7 @@ struct ext4_inode_info { /* block reservation info */ struct ext4_block_alloc_info *i_block_alloc_info; - __u32 i_dir_start_lookup; + ext4_lblk_t i_dir_start_lookup; #ifdef CONFIG_EXT4DEV_FS_XATTR /* * Extended attributes can be read independently of the main file |