linux.git/fs/f2fs/segment.h, branch v4.11

f2fs: update the comment of default nr_pages to skipping

2017-02-27T18:07:46+00:00

Fixes: 2c237ebaa4 ("f2fs: avoid writing node/metapages during writes")
Signed-off-by: Kinglong Mee 
Signed-off-by: Jaegeuk Kim

f2fs: add ovp valid_blocks check for bg gc victim to fg_gc

2017-02-23T19:28:20+00:00

For foreground gc, greedy algorithm should be adapted, which makes
this formula work well:

	(2 * (100 / config.overprovision + 1) + 6)

But currently, we fg_gc have a prior to select bg_gc victim segments to gc
first, these victims are selected by cost-benefit algorithm, we can't guarantee
such segments have the small valid blocks, which may destroy the f2fs rule, on
the worstest case, would consume all the free segments.

This patch fix this by add a filter in check_bg_victims, if segment's has # of
valid blocks over overprovision ratio, skip such segments.

Cc: 
Signed-off-by: Hou Pengyang 
Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: check in-memory sit version bitmap

2017-02-23T02:48:50+00:00

This patch adds a mirror for sit version bitmap, and use it to detect
in-memory bitmap corruption which may be caused by bit-transition of
cache or memory overflow.

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

f2fs: check in-memory block bitmap

2017-02-23T02:48:49+00:00

This patch adds a mirror for valid block bitmap, and use it to detect
in-memory bitmap corruption which may be caused by bit-transition of
cache or memory overflow.

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

f2fs: support IO alignment for DATA and NODE writes

2017-01-29T03:46:01+00:00

This patch implements IO alignment by filling dummy blocks in DATA and NODE
write bios. If we can guarantee, for example, 32KB or 64KB for such the IOs,
we can eliminate underlying dummy page problem which FTL conducts in order to
close MLC or TLC partial written pages.

Note that,
 - it requires "-o mode=lfs".
 - IO size should be power of 2, not exceed BIO_MAX_PAGES, 256.
 - read IO is still 4KB.
 - do checkpoint at fsync, if dummy NODE page was written.

Signed-off-by: Jaegeuk Kim

f2fs: detect wrong layout

2016-12-07T22:37:33+00:00

Previous mkfs.f2fs allows small partition inappropriately, so f2fs should detect
that as well.

Refer this in f2fs-tools.

mkfs.f2fs: detect small partition by overprovision ratio and # of segments

Reported-and-Tested-by: Eric Biggers 
Signed-off-by: Jaegeuk Kim

f2fs: use BIO_MAX_PAGES for bio allocation

2016-11-23T20:11:07+00:00

We don't need to allocate bio partially in order to maximize sequential writes.

Signed-off-by: Jaegeuk Kim

f2fs: count dirty inodes to flush node pages during checkpoint

2016-11-23T20:11:04+00:00

If there are a lot of dirty inodes, we need to flush all of them when doing
checkpoint. So, we need to count this for enough free space.

Reviewed-by: Chao Yu 
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: not allow to write illegal blkaddr

2016-08-24T17:16:14+00:00

we came across an error as below:

[build_nat_area_bitmap:1710] nid[0x    1718] addr[0x         1c18ddc] ino[0x    1718]
[build_nat_area_bitmap:1710] nid[0x    1719] addr[0x         1c193d5] ino[0x    1719]
[build_nat_area_bitmap:1710] nid[0x    171a] addr[0x         1c1736e] ino[0x    171a]
[build_nat_area_bitmap:1710] nid[0x    171b] addr[0x        58b3ee8f] ino[0x815f92ed]
[build_nat_area_bitmap:1710] nid[0x    171c] addr[0x         fcdc94b] ino[0x49366377]
[build_nat_area_bitmap:1710] nid[0x    171d] addr[0x        7cd2facf] ino[0xb3c55300]
[build_nat_area_bitmap:1710] nid[0x    171e] addr[0x        bd4e25d0] ino[0x77c34c09]

... ...

[build_nat_area_bitmap:1710] nid[0x    1718] addr[0x         1c18ddc] ino[0x    1718]
[build_nat_area_bitmap:1710] nid[0x    1719] addr[0x         1c193d5] ino[0x    1719]
[build_nat_area_bitmap:1710] nid[0x    171a] addr[0x         1c1736e] ino[0x    171a]
[build_nat_area_bitmap:1710] nid[0x    171b] addr[0x        58b3ee8f] ino[0x815f92ed]
[build_nat_area_bitmap:1710] nid[0x    171c] addr[0x         fcdc94b] ino[0x49366377]
[build_nat_area_bitmap:1710] nid[0x    171d] addr[0x        7cd2facf] ino[0xb3c55300]
[build_nat_area_bitmap:1710] nid[0x    171e] addr[0x        bd4e25d0] ino[0x77c34c09]

One nat block may be stepped by a data block, so this patch forbid to
write if the blkaddr is illegal

Signed-off-by: Yunlei He 
Signed-off-by: Jaegeuk Kim