linux.git/fs/f2fs/data.c, branch v4.0

f2fs: allocate data blocks in advance for f2fs_direct_IO

2015-02-12T01:04:49+00:00

This patch adds preallocation for data blocks to prepare f2fs_direct_IO.

Signed-off-by: Jaegeuk Kim

f2fs: call set_buffer_new for get_block

2015-02-12T01:04:47+00:00

This patch fixes wrong handling of buffer_new flag in get_block.
If f2fs allocates new blocks and mapped buffer_head, it needs to set buffer_new
for the bh_result.

Signed-off-by: Jaegeuk Kim

f2fs: merge {invalidate,release}page for meta/node/data pages

2015-02-12T01:04:44+00:00

This patch merges ->{invalidate,release}page function for meta/node/data pages.

After this, duplication of codes could be removed.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: keep PagePrivate during releasepage

2015-02-12T01:04:42+00:00

If PagePrivate is removed by releasepage, f2fs loses counting dirty pages.

e.g., try_to_release_page will not release page when the page is dirty,
but our releasepage removes PagePrivate.

    [] try_to_release_page+0x35/0x50
    [] invalidate_inode_pages2_range+0x2f9/0x3b0
    [] ? truncate_blocks+0x384/0x4d0 [f2fs]
    [] ? f2fs_direct_IO+0x283/0x290 [f2fs]
    [] ? get_data_block_fiemap+0x20/0x20 [f2fs]
    [] generic_file_direct_write+0x163/0x170
    [] __generic_file_write_iter+0x2a6/0x350
    [] generic_file_write_iter+0x3f/0xb0
    [] new_sync_write+0x81/0xb0
    [] vfs_write+0xb7/0x1f0
    [] SyS_write+0x49/0xb0
    [] system_call_fastpath+0x16/0x1b

Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: merge flags in struct f2fs_sb_info

2015-02-12T01:04:38+00:00

Currently, there are several variables with Boolean type as below:

struct f2fs_sb_info {
...
	int s_dirty;
	bool need_fsck;
	bool s_closing;
...
	bool por_doing;
...
}

For this there are some issues:
1. there are some space of f2fs_sb_info is wasted due to aligning after Boolean
   type variables by compiler.
2. if we continuously add new flag into f2fs_sb_info, structure will be messed
   up.

So in this patch, we try to:
1. switch s_dirty to Boolean type variable since it has two status 0/1.
2. merge s_dirty/need_fsck/s_closing/por_doing variables into s_flag.
3. introduce an enum type which can indicate different states of sbi.
4. use new introduced universal interfaces is_sbi_flag_set/{set,clear}_sbi_flag
   to operate flags for sbi.

After that, above issues will be fixed.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: fix wrong unlock_page call

2015-01-10T01:02:27+00:00

This patch removes wrongly called unlock_page.

Signed-off-by: Jaegeuk Kim

f2fs: align direct_io'ed data to section

2015-01-10T01:02:27+00:00

This patch aligns the start block address of a file for direct io to the f2fs's
section size.

Some flash devices manage an over 4KB-sized page as a write unit, and if the
direct_io'ed data are written but not aligned to that unit, the performance can
be degraded due to the partial page copies.

Thus, since f2fs has a section that is well aligned to FTL units, we can align
the block address to the section size so that f2fs avoids this misalignment.

Signed-off-by: Jaegeuk Kim

f2fs: remove uncovered code path

2015-01-10T01:02:27+00:00

This patch removes unnecessary function calls.

Signed-off-by: Jaegeuk Kim

f2fs: avoid potential unnecessary codes

2015-01-10T01:02:26+00:00

This patch relocates some operations to avoid unnecessary execution.

Signed-off-by: Jaegeuk Kim

f2fs: clean up to remove parameter

2015-01-10T01:02:26+00:00

This patch uses dn->data_blkaddr as a parameter for the destination block
address.

Signed-off-by: Jaegeuk Kim