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path: root/fs/nilfs2/direct.c
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* nilfs2: support contiguous lookup of blocksRyusuke Konishi2009-06-101-0/+43
| | | | | | | | | | | | Although get_block() callback function can return extent of contiguous blocks with bh->b_size, nilfs_get_block() function did not support this feature. This adds contiguous lookup feature to the block mapping codes of nilfs, and allows the nilfs_get_blocks() function to return the extent information by applying the feature. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: remove nilfs_direct_operations from direct mappingRyusuke Konishi2009-06-101-36/+10
| | | | | | | will remove indirect function calls using nilfs_direct_operations table. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: remove bmap pointer operationsRyusuke Konishi2009-06-101-19/+11
| | | | | | | | | | | | | | | | Previously, the bmap codes of nilfs used three types of function tables. The abuse of indirect function calls decreased source readability and suffered many indirect jumps which would confuse branch prediction of processors. This eliminates one type of the function tables, nilfs_bmap_ptr_operations, which was used to dispatch low level pointer operations of the nilfs bmap. This adds a new integer variable "b_ptr_type" to nilfs_bmap struct, and uses the value to select the pointer operations. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: remove useless b_low and b_high fields from nilfs_bmap structRyusuke Konishi2009-06-101-9/+4
| | | | | | | | | | | This will cut off 16 bytes from the nilfs_bmap struct which is embedded in the on-memory inode of nilfs. The b_high field was never used, and the b_low field stores a constant value which can be determined by whether the inode uses btree for block mapping or not. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: remove pointless NULL check of bpop_commit_alloc_ptr functionRyusuke Konishi2009-06-101-3/+1
| | | | | | | This indirect function is set to NULL only for gc cache inodes, but the gc cache inodes never call this function. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: unify bmap operations starting use of indirect block addressRyusuke Konishi2009-06-101-5/+2
| | | | | | | | | | | This simplifies some low level functions of bmap. Three bmap pointer operations, nilfs_bmap_start_v(), nilfs_bmap_commit_v(), and nilfs_bmap_abort_v(), are unified into one nilfs_bmap_start_v() function. And the related indirect function calls are replaced with it. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
* nilfs2: replace BUG_ON and BUG calls triggerable from ioctlRyusuke Konishi2009-04-071-3/+10
| | | | | | | | | | | | | | | Pekka Enberg advised me: > It would be nice if BUG(), BUG_ON(), and panic() calls would be > converted to proper error handling using WARN_ON() calls. The BUG() > call in nilfs_cpfile_delete_checkpoints(), for example, looks to be > triggerable from user-space via the ioctl() system call. This will follow the comment and keep them to a minimum. Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* nilfs2: clean up indirect function calling conventionsPekka Enberg2009-04-071-14/+14
| | | | | | | | | | This cleans up the strange indirect function calling convention used in nilfs to follow the normal kernel coding style. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Acked-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* nilfs2: direct block mappingKoji Sato2009-04-071-0/+429
This adds block mappings using direct pointers which are stored in the i_bmap array of inode. Signed-off-by: Koji Sato <sato.koji@lab.ntt.co.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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