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author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2008-01-29 04:58:27 (GMT) |
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committer | Theodore Ts'o <tytso@mit.edu> | 2008-01-29 04:58:27 (GMT) |
commit | 725d26d3f09ccb5bac4b4293096b985a312a0d67 (patch) | |
tree | 1c49a07da252832fc6842c88a2359e8cd43af636 /fs/ext4/inode.c | |
parent | a72d7f834e1afa08421938d7eb06bd8e56b0e58c (diff) | |
download | linux-fsl-qoriq-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 'fs/ext4/inode.c')
-rw-r--r-- | fs/ext4/inode.c | 34 |
1 files changed, 19 insertions, 15 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 5489703..488f829 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -105,7 +105,7 @@ int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode, */ static unsigned long blocks_for_truncate(struct inode *inode) { - unsigned long needed; + ext4_lblk_t needed; needed = inode->i_blocks >> (inode->i_sb->s_blocksize_bits - 9); @@ -282,7 +282,8 @@ static int verify_chain(Indirect *from, Indirect *to) */ static int ext4_block_to_path(struct inode *inode, - long i_block, int offsets[4], int *boundary) + ext4_lblk_t i_block, + ext4_lblk_t offsets[4], int *boundary) { int ptrs = EXT4_ADDR_PER_BLOCK(inode->i_sb); int ptrs_bits = EXT4_ADDR_PER_BLOCK_BITS(inode->i_sb); @@ -349,7 +350,8 @@ static int ext4_block_to_path(struct inode *inode, * or when it reads all @depth-1 indirect blocks successfully and finds * the whole chain, all way to the data (returns %NULL, *err == 0). */ -static Indirect *ext4_get_branch(struct inode *inode, int depth, int *offsets, +static Indirect *ext4_get_branch(struct inode *inode, int depth, + ext4_lblk_t *offsets, Indirect chain[4], int *err) { struct super_block *sb = inode->i_sb; @@ -445,7 +447,7 @@ static ext4_fsblk_t ext4_find_near(struct inode *inode, Indirect *ind) * stores it in *@goal and returns zero. */ -static ext4_fsblk_t ext4_find_goal(struct inode *inode, long block, +static ext4_fsblk_t ext4_find_goal(struct inode *inode, ext4_lblk_t block, Indirect chain[4], Indirect *partial) { struct ext4_block_alloc_info *block_i; @@ -590,7 +592,7 @@ failed_out: */ static int ext4_alloc_branch(handle_t *handle, struct inode *inode, int indirect_blks, int *blks, ext4_fsblk_t goal, - int *offsets, Indirect *branch) + ext4_lblk_t *offsets, Indirect *branch) { int blocksize = inode->i_sb->s_blocksize; int i, n = 0; @@ -680,7 +682,7 @@ failed: * chain to new block and return 0. */ static int ext4_splice_branch(handle_t *handle, struct inode *inode, - long block, Indirect *where, int num, int blks) + ext4_lblk_t block, Indirect *where, int num, int blks) { int i; int err = 0; @@ -784,12 +786,12 @@ err_out: * return < 0, error case. */ int ext4_get_blocks_handle(handle_t *handle, struct inode *inode, - sector_t iblock, unsigned long maxblocks, + ext4_lblk_t iblock, unsigned long maxblocks, struct buffer_head *bh_result, int create, int extend_disksize) { int err = -EIO; - int offsets[4]; + ext4_lblk_t offsets[4]; Indirect chain[4]; Indirect *partial; ext4_fsblk_t goal; @@ -803,7 +805,8 @@ int ext4_get_blocks_handle(handle_t *handle, struct inode *inode, J_ASSERT(!(EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL)); J_ASSERT(handle != NULL || create == 0); - depth = ext4_block_to_path(inode,iblock,offsets,&blocks_to_boundary); + depth = ext4_block_to_path(inode, iblock, offsets, + &blocks_to_boundary); if (depth == 0) goto out; @@ -996,7 +999,7 @@ get_block: * `handle' can be NULL if create is zero */ struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode, - long block, int create, int *errp) + ext4_lblk_t block, int create, int *errp) { struct buffer_head dummy; int fatal = 0, err; @@ -1063,7 +1066,7 @@ err: } struct buffer_head *ext4_bread(handle_t *handle, struct inode *inode, - int block, int create, int *err) + ext4_lblk_t block, int create, int *err) { struct buffer_head * bh; @@ -1828,7 +1831,8 @@ int ext4_block_truncate_page(handle_t *handle, struct page *page, { ext4_fsblk_t index = from >> PAGE_CACHE_SHIFT; unsigned offset = from & (PAGE_CACHE_SIZE-1); - unsigned blocksize, iblock, length, pos; + unsigned blocksize, length, pos; + ext4_lblk_t iblock; struct inode *inode = mapping->host; struct buffer_head *bh; int err = 0; @@ -1964,7 +1968,7 @@ static inline int all_zeroes(__le32 *p, __le32 *q) * (no partially truncated stuff there). */ static Indirect *ext4_find_shared(struct inode *inode, int depth, - int offsets[4], Indirect chain[4], __le32 *top) + ext4_lblk_t offsets[4], Indirect chain[4], __le32 *top) { Indirect *partial, *p; int k, err; @@ -2289,12 +2293,12 @@ void ext4_truncate(struct inode *inode) __le32 *i_data = ei->i_data; int addr_per_block = EXT4_ADDR_PER_BLOCK(inode->i_sb); struct address_space *mapping = inode->i_mapping; - int offsets[4]; + ext4_lblk_t offsets[4]; Indirect chain[4]; Indirect *partial; __le32 nr = 0; int n; - long last_block; + ext4_lblk_t last_block; unsigned blocksize = inode->i_sb->s_blocksize; struct page *page; |