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| author | Alex Tomas <alex@clusterfs.com> | 2006-10-11 01:21:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-11 11:14:16 -0700 |
| commit | a86c61812637c7dd0c57e29880cffd477b62f2e7 (patch) | |
| tree | 10737307293afde2999a887cfeac32c7d7584aa7 /fs/ext4/inode.c | |
| parent | c3fcc8137ce4296ad6ab94f88bd60cbe03d21527 (diff) | |
| download | op-kernel-dev-a86c61812637c7dd0c57e29880cffd477b62f2e7.zip op-kernel-dev-a86c61812637c7dd0c57e29880cffd477b62f2e7.tar.gz | |
[PATCH] ext3: add extent map support
On disk extents format:
/*
* this is extent on-disk structure
* it's used at the bottom of the tree
*/
struct ext3_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 bigs of physical block */
};
Signed-off-by: Alex Tomas <alex@clusterfs.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 'fs/ext4/inode.c')
| -rw-r--r-- | fs/ext4/inode.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 0d96c7d..2b81b13 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -40,8 +40,6 @@ #include "xattr.h" #include "acl.h" -static int ext4_writepage_trans_blocks(struct inode *inode); - /* * Test whether an inode is a fast symlink. */ @@ -804,6 +802,7 @@ int ext4_get_blocks_handle(handle_t *handle, struct inode *inode, ext4_fsblk_t first_block = 0; + 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); @@ -984,7 +983,7 @@ static int ext4_get_block(struct inode *inode, sector_t iblock, get_block: if (ret == 0) { - ret = ext4_get_blocks_handle(handle, inode, iblock, + ret = ext4_get_blocks_wrap(handle, inode, iblock, max_blocks, bh_result, create, 0); if (ret > 0) { bh_result->b_size = (ret << inode->i_blkbits); @@ -1008,7 +1007,7 @@ struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode, dummy.b_state = 0; dummy.b_blocknr = -1000; buffer_trace_init(&dummy.b_history); - err = ext4_get_blocks_handle(handle, inode, block, 1, + err = ext4_get_blocks_wrap(handle, inode, block, 1, &dummy, create, 1); /* * ext4_get_blocks_handle() returns number of blocks @@ -1759,7 +1758,7 @@ void ext4_set_aops(struct inode *inode) * This required during truncate. We need to physically zero the tail end * of that block so it doesn't yield old data if the file is later grown. */ -static int ext4_block_truncate_page(handle_t *handle, struct page *page, +int ext4_block_truncate_page(handle_t *handle, struct page *page, struct address_space *mapping, loff_t from) { ext4_fsblk_t index = from >> PAGE_CACHE_SHIFT; @@ -2263,6 +2262,9 @@ void ext4_truncate(struct inode *inode) return; } + if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) + return ext4_ext_truncate(inode, page); + handle = start_transaction(inode); if (IS_ERR(handle)) { if (page) { @@ -3003,12 +3005,15 @@ err_out: * block and work out the exact number of indirects which are touched. Pah. */ -static int ext4_writepage_trans_blocks(struct inode *inode) +int ext4_writepage_trans_blocks(struct inode *inode) { int bpp = ext4_journal_blocks_per_page(inode); int indirects = (EXT4_NDIR_BLOCKS % bpp) ? 5 : 3; int ret; + if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) + return ext4_ext_writepage_trans_blocks(inode, bpp); + if (ext4_should_journal_data(inode)) ret = 3 * (bpp + indirects) + 2; else |
