linux.git/fs/f2fs/data.c, branch v4.9

fs: use mapping_set_error instead of opencoded set_bit

2016-10-11T22:06:33+00:00

The mapping_set_error() helper sets the correct AS_ flag for the mapping
so there is no reason to open code it.  Use the helper directly.

[akpm@linux-foundation.org: be honest about conversion from -ENXIO to -EIO]
Link: http://lkml.kernel.org/r/20160912111608.2588-2-mhocko@kernel.org
Signed-off-by: Michal Hocko 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

f2fs: don't submit irrelevant page

2016-10-01T00:34:39+00:00

While we call ->writepages, there are two cases:
a. we didn't writeout any dirty pages, since they are writebacked by other
thread concurrently.
b. we writeout dirty pages, and have already submitted bio to block layer.

In these cases, we don't need to do additional bio flushing unnecessarily,
it may split bio in cache into smaller one.

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

f2fs: support configuring fault injection per superblock

2016-10-01T00:34:31+00:00

Previously, we only support global fault injection configuration, so that
when we configure type/rate of fault injection through sysfs, mount
option, it will influence all f2fs partition which is being used.

It is not make sence, since it will be not convenient if developer want
to test separated partitions with different fault injection rate/type
simultaneously, also it's not possible to enable fault injection in one
partition and disable fault injection in other one.

>From now on, we move global configuration of fault injection in module
into per-superblock, hence injection testing can be more flexible.

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

f2fs: add customized migrate_page callback

2016-10-01T00:34:23+00:00

This patch improves the migration of dirty pages and allows migrating atomic
written pages that F2FS uses in Page Cache. Instead of the fallback releasing
page path, it provides better performance for memory compaction, CMA and other
users of memory page migrating. For dirty pages, there is no need to write back
first when migrating. For an atomic written page before committing, we can
migrate the page and update the related 'inmem_pages' list at the same time.

Signed-off-by: Weichao Guo 
Reviewed-by: Chao Yu 
[Jaegeuk Kim: fix some coding style]
Signed-off-by: Jaegeuk Kim

f2fs: preallocate blocks for encrypted file

2016-09-22T18:43:08+00:00

This patch allow preallocates data blocks for buffered aio writes
in encrypted file.

Signed-off-by: Yunlei He 
Reviewed-by: Chao Yu 
[Jaegeuk Kim: fix to avoid BUG_ON]
Signed-off-by: Jaegeuk Kim

f2fs: support IO error injection

2016-09-22T18:43:06+00:00

This patch adds to support IO error injection for testing IO error
tolerance of f2fs.

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

f2fs: fix to set PageUptodate in f2fs_write_end correctly

2016-09-13T20:02:34+00:00

Previously, f2fs_write_begin sets PageUptodate all the time. But, when user
tries to update the entire page (i.e., len == PAGE_SIZE), we need to consider
that the page is able to be copied partially afterwards. In such the case,
we will lose the remaing region in the page.

This patch fixes this by setting PageUptodate in f2fs_write_end as given copied
result. In the short copy case, it returns zero to let generic_perform_write
retry copying user data again.

As a result, f2fs_write_end() works:
   PageUptodate      len      copied    return   retry
1. no                4096     4096      4096     false  -> return 4096
2. no                4096     1024      0        true   -> goto #1 case
3. yes               2048     2048      2048     false  -> return 2048
4. yes               2048     1024      1024     false  -> return 1024

Suggested-by: Al Viro 
Signed-off-by: Jaegeuk Kim

f2fs: check free_sections for defragmentation

2016-09-12T17:30:41+00:00

Fix wrong condition check for defragmentation of a file.

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

f2fs: no need to make zeros beyond i_size

2016-09-08T01:53:50+00:00

We don't need to make zeros beyond i_size, since we already wrote that through
NEW_ADDR case.

Reported-by: Al Viro 
Signed-off-by: Jaegeuk Kim

f2fs: fix to preallocate block only aligned to 4K

2016-08-30T01:31:15+00:00

In write_begin(), we skip checking dnode block for preallocating block
when whole block needs to be updated since we preallocated its block in
f2fs_preallocate_blocks, for partial updated block, we will still try
to lock its node and do preallocation in write_begin(), so in
f2fs_preallocate_blocks we should not preallocate its block.

But previously, the calculation of preallocating block number is
incorrect, fix it.

Signed-off-by: Chao Yu 
[Jaegeuk Kim: fix a bug]
Signed-off-by: Jaegeuk Kim