GitHub/moto-9609/android_kernel_motorola_exynos9610.git
8 years agof2fs: declare static functions
Jaegeuk Kim [Tue, 8 Mar 2016 17:04:35 +0000 (09:04 -0800)]
f2fs: declare static functions

Just to avoid sparse warnings.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: use cryptoapi crc32 functions
Keith Mok [Wed, 2 Mar 2016 20:04:24 +0000 (12:04 -0800)]
f2fs: use cryptoapi crc32 functions

The crc function is done bit by bit.
Optimize this by use cryptoapi
crc32 function which is backed by h/w acceleration.

Signed-off-by: Keith Mok <ek9852@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: modify the readahead method in ra_node_page()
Fan Li [Mon, 29 Feb 2016 06:29:51 +0000 (14:29 +0800)]
f2fs: modify the readahead method in ra_node_page()

ra_node_page() is used to read ahead one node page. Comparing to regular
read, it's faster because it doesn't wait for IO completion.
But if it is called twice for reading the same block, and the IO request
from the first call hasn't been completed before the second call, the second
call will have to wait until the read is over.

Here use the code in __do_page_cache_readahead() to solve this problem.
It does nothing when someone else already puts the page in mapping. The
status of page should be assured by whoever puts it there.
This implement also prevents alteration of page reference count.

Signed-off-by: Fan li <fanofcode.li@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs crypto: sync ext4_lookup and ext4_file_open
Jaegeuk Kim [Tue, 23 Feb 2016 17:21:37 +0000 (09:21 -0800)]
f2fs crypto: sync ext4_lookup and ext4_file_open

This patch tries to catch up with lookup and open policies in ext4.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agofs crypto: move per-file encryption from f2fs tree to fs/crypto
Jaegeuk Kim [Fri, 15 May 2015 23:26:10 +0000 (16:26 -0700)]
fs crypto: move per-file encryption from f2fs tree to fs/crypto

This patch adds the renamed functions moved from the f2fs crypto files.

1. definitions for per-file encryption used by ext4 and f2fs.

2. crypto.c for encrypt/decrypt functions
 a. IO preparation:
  - fscrypt_get_ctx / fscrypt_release_ctx
 b. before IOs:
  - fscrypt_encrypt_page
  - fscrypt_decrypt_page
  - fscrypt_zeroout_range
 c. after IOs:
  - fscrypt_decrypt_bio_pages
  - fscrypt_pullback_bio_page
  - fscrypt_restore_control_page

3. policy.c supporting context management.
 a. For ioctls:
  - fscrypt_process_policy
  - fscrypt_get_policy
 b. For context permission
  - fscrypt_has_permitted_context
  - fscrypt_inherit_context

4. keyinfo.c to handle permissions
  - fscrypt_get_encryption_info
  - fscrypt_free_encryption_info

5. fname.c to support filename encryption
 a. general wrapper functions
  - fscrypt_fname_disk_to_usr
  - fscrypt_fname_usr_to_disk
  - fscrypt_setup_filename
  - fscrypt_free_filename

 b. specific filename handling functions
  - fscrypt_fname_alloc_buffer
  - fscrypt_fname_free_buffer

6. Makefile and Kconfig

Cc: Al Viro <viro@ftp.linux.org.uk>
Signed-off-by: Michael Halcrow <mhalcrow@google.com>
Signed-off-by: Ildar Muslukhov <ildarm@google.com>
Signed-off-by: Uday Savagaonkar <savagaon@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: mutex can't be used by down_write_nest_lock()
Yang Shi [Sat, 27 Feb 2016 00:25:25 +0000 (16:25 -0800)]
f2fs: mutex can't be used by down_write_nest_lock()

f2fs_lock_all() calls down_write_nest_lock() to acquire a rw_sem and check
a mutex, but down_write_nest_lock() is designed for two rw_sem accoring to the
comment in include/linux/rwsem.h. And, other than f2fs, it is just called in
mm/mmap.c with two rwsem.

So, it looks it is used wrongly by f2fs. And, it causes the below compile
warning on -rt kernel too.

In file included from fs/f2fs/xattr.c:25:0:
fs/f2fs/f2fs.h: In function 'f2fs_lock_all':
fs/f2fs/f2fs.h:962:34: warning: passing argument 2 of 'down_write_nest_lock' from incompatible pointer type [-Wincompatible-pointer-types]
  f2fs_down_write(&sbi->cp_rwsem, &sbi->cp_mutex);
                                  ^
fs/f2fs/f2fs.h:27:55: note: in definition of macro 'f2fs_down_write'
 #define f2fs_down_write(x, y) down_write_nest_lock(x, y)
                                                       ^
In file included from include/linux/rwsem.h:22:0,
                 from fs/f2fs/xattr.c:21:
include/linux/rwsem_rt.h:138:20: note: expected 'struct rw_semaphore *' but argument is of type 'struct mutex *'
 static inline void down_write_nest_lock(struct rw_semaphore *sem,

Signed-off-by: Yang Shi <yang.shi@linaro.org>
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: recovery missing dot dentries in root directory
Liu Xue [Fri, 26 Feb 2016 06:39:23 +0000 (06:39 +0000)]
f2fs: recovery missing dot dentries in root directory

If f2fs was corrupted with missing dot dentries in root dirctory,
it needs to recover them after fsck.f2fs set F2FS_INLINE_DOTS flag
in directory inode when fsck.f2fs detects missing dot dentries.

Signed-off-by: Xue Liu <liuxueliu.liu@huawei.com>
Signed-off-by: Yong Sheng <shengyong1@huawei.com>
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: fix to avoid deadlock when merging inline data
Chao Yu [Fri, 26 Feb 2016 01:33:04 +0000 (09:33 +0800)]
f2fs: fix to avoid deadlock when merging inline data

When testing with fsstress, kworker and user threads were both blocked:

INFO: task kworker/u16:1:16580 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u16:1   D ffff8803f2595390     0 16580      2 0x00000000
Workqueue: writeback bdi_writeback_workfn (flush-251:0)
 ffff8802730e5760 0000000000000046 ffff880274729fc0 0000000000012440
 ffff8802730e5fd8 ffff8802730e4010 0000000000012440 0000000000012440
 ffff8802730e5fd8 0000000000012440 ffff880274729fc0 ffff88026eb50000
Call Trace:
 [<ffffffff816fe9d9>] schedule+0x29/0x70
 [<ffffffff816ff895>] rwsem_down_read_failed+0xa5/0xf9
 [<ffffffff81378584>] call_rwsem_down_read_failed+0x14/0x30
 [<ffffffffa0694feb>] f2fs_write_data_page+0x31b/0x420 [f2fs]
 [<ffffffffa0690f1a>] __f2fs_writepage+0x1a/0x50 [f2fs]
 [<ffffffffa06922a0>] f2fs_write_data_pages+0xe0/0x290 [f2fs]
 [<ffffffff811473b3>] do_writepages+0x23/0x40
 [<ffffffff811cc3ee>] __writeback_single_inode+0x4e/0x250
 [<ffffffff811cd4f1>] writeback_sb_inodes+0x2c1/0x470
 [<ffffffff811cd73e>] __writeback_inodes_wb+0x9e/0xd0
 [<ffffffff811cda0b>] wb_writeback+0x1fb/0x2d0
 [<ffffffff811cdb7c>] wb_do_writeback+0x9c/0x220
 [<ffffffff811ce232>] bdi_writeback_workfn+0x72/0x1c0
 [<ffffffff8106b74e>] process_one_work+0x1de/0x5b0
 [<ffffffff8106e78f>] worker_thread+0x11f/0x3e0
 [<ffffffff810750ce>] kthread+0xde/0xf0
 [<ffffffff817093f8>] ret_from_fork+0x58/0x90

fsstress thread stack:
 [<ffffffff81139f0e>] sleep_on_page+0xe/0x20
 [<ffffffff81139ef7>] __lock_page+0x67/0x70
 [<ffffffff8113b100>] find_lock_page+0x50/0x80
 [<ffffffff8113b24f>] find_or_create_page+0x3f/0xb0
 [<ffffffffa06983a9>] sync_node_pages+0x259/0x810 [f2fs]
 [<ffffffffa068d874>] write_checkpoint+0x1a4/0xce0 [f2fs]
 [<ffffffffa0686b0c>] f2fs_sync_fs+0x7c/0xd0 [f2fs]
 [<ffffffffa067c813>] f2fs_sync_file+0x143/0x5f0 [f2fs]
 [<ffffffff811d301b>] vfs_fsync_range+0x2b/0x40
 [<ffffffff811d304c>] vfs_fsync+0x1c/0x20
 [<ffffffff811d3291>] do_fsync+0x41/0x70
 [<ffffffff811d32d3>] SyS_fdatasync+0x13/0x20
 [<ffffffff817094a2>] system_call_fastpath+0x16/0x1b
 [<ffffffffffffffff>] 0xffffffffffffffff

The reason of this issue is:
CPU0: CPU1:
 - f2fs_write_data_pages
 - f2fs_sync_fs
  - write_checkpoint
   - block_operations
    - f2fs_lock_all
     - down_write(sbi->cp_rwsem)
  - lock_page(page)
  - f2fs_write_data_page
    - sync_node_pages
     - flush_inline_data
      - pagecache_get_page(page, GFP_LOCK)
   - f2fs_lock_op
    - down_read(sbi->cp_rwsem)

This patch alters to use trylock_page in flush_inline_data to fix this ABBA
deadlock issue.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: introduce f2fs_flush_merged_bios for cleanup
Chao Yu [Wed, 24 Feb 2016 09:17:55 +0000 (17:17 +0800)]
f2fs: introduce f2fs_flush_merged_bios for cleanup

Add a new helper f2fs_flush_merged_bios to clean up redundant codes.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: introduce f2fs_update_data_blkaddr for cleanup
Chao Yu [Wed, 24 Feb 2016 09:16:47 +0000 (17:16 +0800)]
f2fs: introduce f2fs_update_data_blkaddr for cleanup

Add a new help f2fs_update_data_blkaddr to clean up redundant codes.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs crypto: fix incorrect positioning for GCing encrypted data page
Chao Yu [Tue, 23 Feb 2016 09:52:43 +0000 (17:52 +0800)]
f2fs crypto: fix incorrect positioning for GCing encrypted data page

For now, flow of GCing an encrypted data page:
1) try to grab meta page in meta inode's mapping with index of old block
address of that data page
2) load data of ciphertext into meta page
3) allocate new block address
4) write the meta page into new block address
5) update block address pointer in direct node page.

Other reader/writer will use f2fs_wait_on_encrypted_page_writeback to
check and wait on GCed encrypted data cached in meta page writebacked
in order to avoid inconsistence among data page cache, meta page cache
and data on-disk when updating.

However, we will use new block address updated in step 5) as an index to
lookup meta page in inner bio buffer. That would be wrong, and we will
never find the GCing meta page, since we use the old block address as
index of that page in step 1).

This patch fixes the issue by adjust the order of step 1) and step 3),
and in step 1) grab page with index generated in step 3).

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: fix incorrect upper bound when iterating inode mapping tree
Chao Yu [Wed, 24 Feb 2016 09:20:44 +0000 (17:20 +0800)]
f2fs: fix incorrect upper bound when iterating inode mapping tree

1. Inode mapping tree can index page in range of [0, ULONG_MAX], however,
in some places, f2fs only search or iterate page in ragne of [0, LONG_MAX],
result in miss hitting in page cache.

2. filemap_fdatawait_range accepts range parameters in unit of bytes, so
the max range it covers should be [0, LLONG_MAX], if we use [0, LONG_MAX]
as range for waiting on writeback, big number of pages will not be covered.

This patch corrects above two issues.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: avoid hungtask problem caused by losing wake_up
Yunlei He [Tue, 23 Feb 2016 04:07:56 +0000 (12:07 +0800)]
f2fs: avoid hungtask problem caused by losing wake_up

The D state of wait_on_all_pages_writeback should be waken by
function f2fs_write_end_io when all writeback pages have been
succesfully written to device. It's possible that wake_up comes
between get_pages and io_schedule. Maybe in this case it will
lost wake_up and still in D state even if all pages have been
write back to device, and finally, the whole system will be into
the hungtask state.

                if (!get_pages(sbi, F2FS_WRITEBACK))
                         break;
<---------  wake_up
                io_schedule();

Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Biao He <hebiao6@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: trace old block address for CoWed page
Chao Yu [Mon, 22 Feb 2016 10:36:38 +0000 (18:36 +0800)]
f2fs: trace old block address for CoWed page

This patch enables to trace old block address of CoWed page for better
debugging.

f2fs_submit_page_mbio: dev = (1,0), ino = 1, page_index = 0x1d4f0, oldaddr = 0xfe8ab, newaddr = 0xfee90 rw = WRITE_SYNC, type = NODE
f2fs_submit_page_mbio: dev = (1,0), ino = 1, page_index = 0x1d4f8, oldaddr = 0xfe8b0, newaddr = 0xfee91 rw = WRITE_SYNC, type = NODE
f2fs_submit_page_mbio: dev = (1,0), ino = 1, page_index = 0x1d4fa, oldaddr = 0xfe8ae, newaddr = 0xfee92 rw = WRITE_SYNC, type = NODE

f2fs_submit_page_mbio: dev = (1,0), ino = 134824, page_index = 0x96, oldaddr = 0xf049b, newaddr = 0x2bbe rw = WRITE, type = DATA
f2fs_submit_page_mbio: dev = (1,0), ino = 134824, page_index = 0x97, oldaddr = 0xf049c, newaddr = 0x2bbf rw = WRITE, type = DATA
f2fs_submit_page_mbio: dev = (1,0), ino = 134824, page_index = 0x98, oldaddr = 0xf049d, newaddr = 0x2bc0 rw = WRITE, type = DATA

f2fs_submit_page_mbio: dev = (1,0), ino = 135260, page_index = 0x47, oldaddr = 0xffffffff, newaddr = 0xf2631 rw = WRITE, type = DATA
f2fs_submit_page_mbio: dev = (1,0), ino = 135260, page_index = 0x48, oldaddr = 0xffffffff, newaddr = 0xf2632 rw = WRITE, type = DATA
f2fs_submit_page_mbio: dev = (1,0), ino = 135260, page_index = 0x49, oldaddr = 0xffffffff, newaddr = 0xf2633 rw = WRITE, type = DATA

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: try to flush inode after merging inline data
Chao Yu [Mon, 22 Feb 2016 10:35:46 +0000 (18:35 +0800)]
f2fs: try to flush inode after merging inline data

When flushing node pages, if current node page is an inline inode page, we
will try to merge inline data from data page into inline inode page, then
skip flushing current node page, it will decrease the number of nodes to
be flushed in batch in this round, which may lead to worse performance.

This patch gives a chance to flush just merged inline inode pages for
performance.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: show more info about superblock recovery
Chao Yu [Mon, 22 Feb 2016 10:33:20 +0000 (18:33 +0800)]
f2fs: show more info about superblock recovery

This patch changes to show more info in message log about the recovery
of the corrupted superblock during ->mount, e.g. the index of corrupted
superblock and the result of recovery.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: fix the wrong stat count of calling gc
Chao Yu [Mon, 22 Feb 2016 10:32:13 +0000 (18:32 +0800)]
f2fs: fix the wrong stat count of calling gc

With a partition which was formated as multi segments in one section,
we stated incorrectly for count of gc operation.

e.g., for a partition with segs_per_sec = 4

cat /sys/kernel/debug/f2fs/status

GC calls: 208 (BG: 7)
  - data segments : 104 (52)
  - node segments : 104 (24)

GC called count should be (104 (data segs) + 104 (node segs)) / 4 = 52,
rather than 208. Fix it.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: remain last victim segment number ascending order
Jaegeuk Kim [Fri, 19 Feb 2016 00:34:38 +0000 (16:34 -0800)]
f2fs: remain last victim segment number ascending order

This patch avoids to remain inefficient victim segment number selected by
a victim.

For example, if all the dirty segments has same valid blocks, we can get
the victim segments descending order due to keeping wrong last segment number.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: reuse read_inline_data for f2fs_convert_inline_page
Shawn Lin [Fri, 19 Feb 2016 08:02:51 +0000 (16:02 +0800)]
f2fs: reuse read_inline_data for f2fs_convert_inline_page

f2fs_convert_inline_page introduce what read_inline_data
already does for copying out the inline data from inode_page.
We can use read_inline_data instead to simplify the code.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: fix to delete old dirent in converted inline directory in ->rename
Chao Yu [Wed, 17 Feb 2016 08:47:05 +0000 (16:47 +0800)]
f2fs: fix to delete old dirent in converted inline directory in ->rename

When doing test with fstests/generic/068 in inline_dentry enabled f2fs,
following oops dmesg will be reported:

 ------------[ cut here ]------------
 WARNING: CPU: 5 PID: 11841 at fs/inode.c:273 drop_nlink+0x49/0x50()
 Modules linked in: f2fs(O) ip6table_filter ip6_tables ebtable_nat ebtables nf_conntrack_ipv4 nf_defrag_ipv4 xt_state
 CPU: 5 PID: 11841 Comm: fsstress Tainted: G           O    4.5.0-rc1 #45
 Hardware name: Hewlett-Packard HP Z220 CMT Workstation/1790, BIOS K51 v01.61 05/16/2013
  0000000000000111 ffff88009cdf7ae8 ffffffff813e5944 0000000000002e41
  0000000000000000 0000000000000111 0000000000000000 ffff88009cdf7b28
  ffffffff8106a587 ffff88009cdf7b58 ffff8804078fe180 ffff880374a64e00
 Call Trace:
  [<ffffffff813e5944>] dump_stack+0x48/0x64
  [<ffffffff8106a587>] warn_slowpath_common+0x97/0xe0
  [<ffffffff8106a5ea>] warn_slowpath_null+0x1a/0x20
  [<ffffffff81231039>] drop_nlink+0x49/0x50
  [<ffffffffa07b95b4>] f2fs_rename2+0xe04/0x10c0 [f2fs]
  [<ffffffff81231ff1>] ? lock_two_nondirectories+0x81/0x90
  [<ffffffff813f454d>] ? lockref_get+0x1d/0x30
  [<ffffffff81220f70>] vfs_rename+0x2e0/0x640
  [<ffffffff8121f9db>] ? lookup_dcache+0x3b/0xd0
  [<ffffffff810b8e41>] ? update_fast_ctr+0x21/0x40
  [<ffffffff8134ff12>] ? security_path_rename+0xa2/0xd0
  [<ffffffff81224af6>] SYSC_renameat2+0x4b6/0x540
  [<ffffffff810ba8ed>] ? trace_hardirqs_off+0xd/0x10
  [<ffffffff810022ba>] ? exit_to_usermode_loop+0x7a/0xd0
  [<ffffffff817e0ade>] ? int_ret_from_sys_call+0x52/0x9f
  [<ffffffff810bdc90>] ? trace_hardirqs_on_caller+0x100/0x1c0
  [<ffffffff81224b8e>] SyS_renameat2+0xe/0x10
  [<ffffffff8121f08e>] SyS_rename+0x1e/0x20
  [<ffffffff817e0957>] entry_SYSCALL_64_fastpath+0x12/0x6f
 ---[ end trace 2b31e17995404e42 ]---

This is because: in the same inline directory, when we renaming one file
from source name to target name which is not existed, once space of inline
dentry is not enough, inline conversion will be triggered, after that all
data in inline dentry will be moved to normal dentry page.

After attaching the new entry in coverted dentry page, still we try to
remove old entry in original inline dentry, since old entry has been
moved, so it obviously doesn't make any effect, result in remaining old
entry in converted dentry page.

Now, we have two valid dentries pointed to the same inode which has nlink
value of 1, deleting them both, above warning appears.

This issue can be reproduced easily as below steps:
1. mount f2fs with inline_dentry option
2. mkdir dir
3. touch 180 files named [001-180] in dir
4. rename dir/180 dir/181
5. rm dir/180 dir/181

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: detect error of update_dent_inode in ->rename
Chao Yu [Wed, 17 Feb 2016 08:45:44 +0000 (16:45 +0800)]
f2fs: detect error of update_dent_inode in ->rename

Should check and show correct return value of update_dent_inode in
->rename.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: move sanity checking of cp into get_valid_checkpoint
Shawn Lin [Wed, 17 Feb 2016 03:26:32 +0000 (11:26 +0800)]
f2fs: move sanity checking of cp into get_valid_checkpoint

>From the function name of get_valid_checkpoint, it seems to return
the valid cp or NULL for caller to check. If no valid one is found,
f2fs_fill_super will print the err log. But if get_valid_checkpoint
get one valid(the return value indicate that it's valid, however actually
it is invalid after sanity checking), then print another similar err
log. That seems strange. Let's keep sanity checking inside the procedure
of geting valid cp. Another improvement we gained from this move is
that even the large volume is supported, we check the cp in advanced
to skip the following procedure if failing the sanity checking.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: slightly reorganize read_raw_super_block
Shawn Lin [Wed, 17 Feb 2016 00:59:01 +0000 (08:59 +0800)]
f2fs: slightly reorganize read_raw_super_block

read_raw_super_block was introduced to help find the
first valid superblock. Commit da554e48caab ("f2fs:
recovering broken superblock during mount") changed the
behaviour to read both of them and check whether need
the recovery flag or not. So the comment before this
function isn't consistent with what it actually does.
Also, the origin code use two tags to round the err
cases, which isn't so readable. So this patch amend
the comment and slightly reorganize it.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: reorder nat cache lock in cache_nat_entry
Chao Yu [Fri, 19 Feb 2016 10:12:28 +0000 (18:12 +0800)]
f2fs: reorder nat cache lock in cache_nat_entry

When lookuping nat entry in cache_nat_entry, if we fail to hit nat cache,
we try to load nat entries a) from journal of current segment cache or b)
from NAT pages for updating, during the process, write lock of
nat_tree_lock will be held to avoid inconsistent condition in between
nid cache and nat cache caused by racing among nat entry shrinker,
checkpointer, nat entry updater.

But this way may cause low efficient when updating nat cache, because it
serializes accessing in journal cache or reading NAT pages.

Here, we reorder lock and update flow as below to enhance accessing
concurrency:

 - get_node_info
  - down_read(nat_tree_lock)
  - lookup nat cache --- hit -> unlock & return
  - lookup journal cache --- hit -> unlock & goto update
  - up_read(nat_tree_lock)
update:
  - down_write(nat_tree_lock)
  - cache_nat_entry
   - lookup nat cache --- nohit -> update
  - up_write(nat_tree_lock)

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: split journal cache from curseg cache
Chao Yu [Fri, 19 Feb 2016 10:08:46 +0000 (18:08 +0800)]
f2fs: split journal cache from curseg cache

In curseg cache, f2fs caches two different parts:
 - datas of current summay block, i.e. summary entries, footer info.
 - journal info, i.e. sparse nat/sit entries or io stat info.

With this approach, 1) it may cause higher lock contention when we access
or update both of the parts of cache since we use the same mutex lock
curseg_mutex to protect the cache. 2) current summary block with last
journal info will be writebacked into device as a normal summary block
when flushing, however, we treat journal info as valid one only in current
summary, so most normal summary blocks contain junk journal data, it wastes
remaining space of summary block.

So, in order to fix above issues, we split curseg cache into two parts:
a) current summary block, protected by original mutex lock curseg_mutex
b) journal cache, protected by newly introduced r/w semaphore journal_rwsem

When loading curseg cache during ->mount, we store summary info and
journal info into different caches; When doing checkpoint, we combine
datas of two cache into current summary block for persisting.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: enhance IO path with block plug
Chao Yu [Sun, 14 Feb 2016 10:54:33 +0000 (18:54 +0800)]
f2fs: enhance IO path with block plug

Try to use block plug in more place as below to let process cache bios
as much as possbile, in order to reduce lock overhead of queue in IO
scheduler.
1) sync_meta_pages
2) ra_meta_pages
3) f2fs_balance_fs_bg

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: introduce f2fs_journal struct to wrap journal info
Chao Yu [Sun, 14 Feb 2016 10:50:40 +0000 (18:50 +0800)]
f2fs: introduce f2fs_journal struct to wrap journal info

Introduce a new structure f2fs_journal to wrap journal info in struct
f2fs_summary_block for readability.

struct f2fs_journal {
union {
__le16 n_nats;
__le16 n_sits;
};
union {
struct nat_journal nat_j;
struct sit_journal sit_j;
struct f2fs_extra_info info;
};
} __packed;

struct f2fs_summary_block {
struct f2fs_summary entries[ENTRIES_IN_SUM];
struct f2fs_journal journal;
struct summary_footer footer;
} __packed;

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs crypto: avoid unneeded memory allocation when {en/de}crypting symlink
Chao Yu [Mon, 15 Feb 2016 09:54:26 +0000 (17:54 +0800)]
f2fs crypto: avoid unneeded memory allocation when {en/de}crypting symlink

This patch adopts f2fs with codes of ext4, it removes unneeded memory
allocation in creating/accessing path of symlink.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs crypto: handle unexpected lack of encryption keys
Chao Yu [Sun, 14 Feb 2016 10:58:35 +0000 (18:58 +0800)]
f2fs crypto: handle unexpected lack of encryption keys

This patch syncs f2fs with commit abdd438b26b4 ("ext4 crypto: handle
unexpected lack of encryption keys") from ext4.

Fix up attempts by users to try to write to a file when they don't
have access to the encryption key.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs crypto: make sure the encryption info is initialized on opendir(2)
Chao Yu [Sun, 14 Feb 2016 10:56:55 +0000 (18:56 +0800)]
f2fs crypto: make sure the encryption info is initialized on opendir(2)

This patch syncs f2fs with commit 6bc445e0ff44 ("ext4 crypto: make
sure the encryption info is initialized on opendir(2)") from ext4.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: support revoking atomic written pages
Chao Yu [Sat, 6 Feb 2016 06:40:34 +0000 (14:40 +0800)]
f2fs: support revoking atomic written pages

f2fs support atomic write with following semantics:
1. open db file
2. ioctl start atomic write
3. (write db file) * n
4. ioctl commit atomic write
5. close db file

With this flow we can avoid file becoming corrupted when abnormal power
cut, because we hold data of transaction in referenced pages linked in
inmem_pages list of inode, but without setting them dirty, so these data
won't be persisted unless we commit them in step 4.

But we should still hold journal db file in memory by using volatile
write, because our semantics of 'atomic write support' is incomplete, in
step 4, we could fail to submit all dirty data of transaction, once
partial dirty data was committed in storage, then after a checkpoint &
abnormal power-cut, db file will be corrupted forever.

So this patch tries to improve atomic write flow by adding a revoking flow,
once inner error occurs in committing, this gives another chance to try to
revoke these partial submitted data of current transaction, it makes
committing operation more like aotmical one.

If we're not lucky, once revoking operation was failed, EAGAIN will be
reported to user for suggesting doing the recovery with held journal file,
or retrying current transaction again.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: split drop_inmem_pages from commit_inmem_pages
Chao Yu [Sat, 6 Feb 2016 06:38:29 +0000 (14:38 +0800)]
f2fs: split drop_inmem_pages from commit_inmem_pages

Split drop_inmem_pages from commit_inmem_pages for code readability,
and prepare for the following modification.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: avoid garbage lenghs in dentries
Jaegeuk Kim [Fri, 12 Feb 2016 22:29:28 +0000 (14:29 -0800)]
f2fs: avoid garbage lenghs in dentries

This patch fixes to eliminate garbage name lengths in dentries in order
to provide correct answers of readdir.

For example, if a valid dentry consists of:
 bitmap : 1   1 1 1
 len    : 32  0 x 0,

readdir can start with second bit_pos having len = 0.
Or, it can start with third bit_pos having garbage.

In both of cases, we should avoid to try filling dentries.
So, this patch not only removes any garbage length, but also avoid entering
zero length case in readdir.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs crypto: sync with ext4's fname padding
Jaegeuk Kim [Wed, 10 Feb 2016 21:23:16 +0000 (13:23 -0800)]
f2fs crypto: sync with ext4's fname padding

This patch fixes wrong adoption on fname padding.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: use correct errno
Jaegeuk Kim [Tue, 9 Feb 2016 18:24:31 +0000 (10:24 -0800)]
f2fs: use correct errno

This patch is to fix misused error number.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs crypto: add missing locking for keyring_key access
Jaegeuk Kim [Sat, 6 Feb 2016 03:38:42 +0000 (19:38 -0800)]
f2fs crypto: add missing locking for keyring_key access

This patch adopts:
ext4 crypto: add missing locking for keyring_key access

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs crypto: check for too-short encrypted file names
Jaegeuk Kim [Sat, 6 Feb 2016 03:37:27 +0000 (19:37 -0800)]
f2fs crypto: check for too-short encrypted file names

This patch adopts:
ext4 crypto: check for too-short encrypted file names

An encrypted file name should never be shorter than an 16 bytes, the
AES block size.  The 3.10 crypto layer will oops and crash the kernel
if ciphertext shorter than the block size is passed to it.

Fortunately, in modern kernels the crypto layer will not crash the
kernel in this scenario, but nevertheless, it represents a corrupted
directory, and we should detect it and mark the file system as
corrupted so that e2fsck can fix this.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs crypto: f2fs_page_crypto() doesn't need a encryption context
Jaegeuk Kim [Sat, 6 Feb 2016 03:34:31 +0000 (19:34 -0800)]
f2fs crypto: f2fs_page_crypto() doesn't need a encryption context

This patch adopts:
ext4 crypto: ext4_page_crypto() doesn't need a encryption context

Since ext4_page_crypto() doesn't need an encryption context (at least
not any more), this allows us to simplify a number function signature
and also allows us to avoid needing to allocate a context in
ext4_block_write_begin().  It also means we no longer need a separate
ext4_decrypt_one() function.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs crypto: fix spelling typo in comment
Jaegeuk Kim [Sat, 6 Feb 2016 03:21:41 +0000 (19:21 -0800)]
f2fs crypto: fix spelling typo in comment

This patch adopts:
ext4 crypto: fix spelling typo in comment

Signed-off-by: Laurent Navet <laurent.navet@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs crypto: replace some BUG_ON()'s with error checks
Jaegeuk Kim [Sat, 6 Feb 2016 03:19:01 +0000 (19:19 -0800)]
f2fs crypto: replace some BUG_ON()'s with error checks

This patch adopts:
ext4 crypto: replace some BUG_ON()'s with error checks

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: increase i_size to avoid missing data
Jaegeuk Kim [Mon, 8 Feb 2016 22:17:38 +0000 (14:17 -0800)]
f2fs: increase i_size to avoid missing data

When finsert is doing with dirting pages, we should increase i_size right away.
Otherwise, the moved page is able to be dropped by the following
filemap_write_and_wait_range before updating i_size.
Especially, it can be done by
if ((page->index >= end_index + 1) || !offset)
goto out;
in f2fs_write_data_page.

This should resolve the below xfstests/091 failure reported by Dave.

$ diff -u tests/generic/091.out /home/dave/src/xfstests-dev/results//f2fs/generic/091.out.bad
--- tests/generic/091.out       2014-01-20 16:57:33.000000000 +1100
+++ /home/dave/src/xfstests-dev/results//f2fs/generic/091.out.bad       2016-02-08 15:21:02.701375087 +1100
@@ -1,7 +1,18 @@
 QA output created by 091
 fsx -N 10000 -l 500000 -r PSIZE -t BSIZE -w BSIZE -Z -R -W
-fsx -N 10000 -o 8192 -l 500000 -r PSIZE -t BSIZE -w BSIZE -Z -R -W
-fsx -N 10000 -o 32768 -l 500000 -r PSIZE -t BSIZE -w BSIZE -Z -R -W
-fsx -N 10000 -o 8192 -l 500000 -r PSIZE -t BSIZE -w BSIZE -Z -R -W
-fsx -N 10000 -o 32768 -l 500000 -r PSIZE -t BSIZE -w BSIZE -Z -R -W
-fsx -N 10000 -o 128000 -l 500000 -r PSIZE -t BSIZE -w BSIZE -Z -W
+mapped writes DISABLED
+skipping insert range behind EOF
+skipping insert range behind EOF
+truncating to largest ever: 0x11e00
+dowrite: write: Invalid argument
+LOG DUMP (7 total operations):
+1(  1 mod 256): SKIPPED (no operation)
+2(  2 mod 256): SKIPPED (no operation)
+3(  3 mod 256): FALLOC   0x2e0f2 thru 0x3134a  (0x3258 bytes) PAST_EOF
+4(  4 mod 256): SKIPPED (no operation)
+5(  5 mod 256): SKIPPED (no operation)
+6(  6 mod 256): TRUNCATE UP    from 0x0 to 0x11e00
+7(  7 mod 256): WRITE    0x73400 thru 0x79fff  (0x6c00 bytes) HOLE
+Log of operations saved to "/mnt/test/junk.fsxops"; replay with --replay-ops
+Correct content saved for comparison
+(maybe hexdump "/mnt/test/junk" vs "/mnt/test/junk.fsxgood")

Reported-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: preallocate blocks for buffered aio writes
Jaegeuk Kim [Wed, 3 Feb 2016 21:49:44 +0000 (13:49 -0800)]
f2fs: preallocate blocks for buffered aio writes

This patch preallocates data blocks for buffered aio writes.
With this patch, we can avoid redundant locking and unlocking of node pages
given consecutive aio request.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: move dio preallocation into f2fs_file_write_iter
Jaegeuk Kim [Wed, 3 Feb 2016 21:09:09 +0000 (13:09 -0800)]
f2fs: move dio preallocation into f2fs_file_write_iter

This patch moves preallocation code for direct IOs into f2fs_file_write_iter.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: fix missing skip pages info
Yunlei He [Thu, 4 Feb 2016 08:14:00 +0000 (16:14 +0800)]
f2fs: fix missing skip pages info

fix missing skip pages info in f2fs_writepages trace event.

Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: introduce f2fs_submit_merged_bio_cond
Chao Yu [Mon, 18 Jan 2016 10:28:11 +0000 (18:28 +0800)]
f2fs: introduce f2fs_submit_merged_bio_cond

f2fs use single bio buffer per type data (META/NODE/DATA) for caching
writes locating in continuous block address as many as possible, after
submitting, these writes may be still cached in bio buffer, so we have
to flush cached writes in bio buffer by calling f2fs_submit_merged_bio.

Unfortunately, in the scenario of high concurrency, bio buffer could be
flushed by someone else before we submit it as below reasons:
a) there is no space in bio buffer.
b) add a request of different type (SYNC, ASYNC).
c) add a discontinuous block address.

For this condition, f2fs_submit_merged_bio will be devastating, because
it could break the following merging of writes in bio buffer, split one
big bio into two smaller one.

This patch introduces f2fs_submit_merged_bio_cond which can do a
conditional submitting with bio buffer, before submitting it will judge
whether:
 - page in DATA type bio buffer is matching with specified page;
 - page in DATA type bio buffer is belong to specified inode;
 - page in NODE type bio buffer is belong to specified inode;
If there is no eligible page in bio buffer, we will skip submitting step,
result in gaining more chance to merge consecutive block IOs in bio cache.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: fix conflict on page->private usage
Jaegeuk Kim [Sat, 30 Jan 2016 00:21:15 +0000 (16:21 -0800)]
f2fs: fix conflict on page->private usage

This patch fixes confilct on page->private value between f2fs_trace_pid and
atomic page.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: flush bios to handle cp_error in put_super
Jaegeuk Kim [Fri, 29 Jan 2016 16:57:59 +0000 (08:57 -0800)]
f2fs: flush bios to handle cp_error in put_super

Sometimes, if cp_error is set, there remains under-writeback pages, resulting in
kernel hang in put_super.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: wait on page's writeback in writepages path
Jaegeuk Kim [Thu, 28 Jan 2016 19:48:52 +0000 (11:48 -0800)]
f2fs: wait on page's writeback in writepages path

Likewise f2fs_write_cache_pages, let's do for node and meta pages too.
Especially, for node blocks, we should do this before marking its fsync
and dentry flags.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: fix endianness of on-disk summary_footer
Sheng Yong [Thu, 28 Jan 2016 11:40:26 +0000 (11:40 +0000)]
f2fs: fix endianness of on-disk summary_footer

Signed-off-by: Sheng Yong <shengyong1@huawei.com>
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: speed up handling holes in fiemap
Chao Yu [Tue, 26 Jan 2016 07:42:58 +0000 (15:42 +0800)]
f2fs: speed up handling holes in fiemap

This patch makes f2fs_map_blocks supporting returning next potential
page offset which skips hole region in indirect tree of inode, and
use it to speed up fiemap in handling big hole case.

Test method:
xfs_io -f /mnt/f2fs/file  -c "pwrite 1099511627776 4096"
time xfs_io -f /mnt/f2fs/file -c "fiemap -v"

Before:
time xfs_io -f /mnt/f2fs/file -c "fiemap -v"
/mnt/f2fs/file:
 EXT: FILE-OFFSET              BLOCK-RANGE      TOTAL FLAGS
   0: [0..2147483647]:         hole             2147483648
   1: [2147483648..2147483655]: 81920..81927         8   0x1

real    3m3.518s
user    0m0.000s
sys     3m3.456s

After:
time xfs_io -f /mnt/f2fs/file -c "fiemap -v"
/mnt/f2fs/file:
 EXT: FILE-OFFSET              BLOCK-RANGE      TOTAL FLAGS
   0: [0..2147483647]:         hole             2147483648
   1: [2147483648..2147483655]: 81920..81927         8   0x1

real    0m0.008s
user    0m0.000s
sys     0m0.008s

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: introduce get_next_page_offset to speed up SEEK_DATA
Chao Yu [Tue, 26 Jan 2016 07:40:44 +0000 (15:40 +0800)]
f2fs: introduce get_next_page_offset to speed up SEEK_DATA

When seeking data in ->llseek, if we encounter a big hole which covers
several dnode pages, we will try to seek data from index of page which
is the first page of next dnode page, at most we could skip searching
(ADDRS_PER_BLOCK - 1) pages.

However it's still not efficient, because if our indirect/double-indirect
pointer are NULL, there are no dnode page locate in the tree indirect/
double-indirect pointer point to, it's not necessary to search the whole
region.

This patch introduces get_next_page_offset to calculate next page offset
based on current searching level and max searching level returned from
get_dnode_of_data, with this, we could skip searching the entire area
indirect or double-indirect node block is not exist.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: remove unneeded pointer conversion
Chao Yu [Tue, 26 Jan 2016 07:39:35 +0000 (15:39 +0800)]
f2fs: remove unneeded pointer conversion

There are redundant pointer conversion in following call stack:
 - at position a, inode was been converted to f2fs_file_info.
 - at position b, f2fs_file_info was been converted to inode again.

 - truncate_blocks(inode,..)
  - fi = F2FS_I(inode) ---a
  - ADDRS_PER_PAGE(node_page, fi)
   - addrs_per_inode(fi)
    - inode = &fi->vfs_inode ---b
    - f2fs_has_inline_xattr(inode)
     - fi = F2FS_I(inode)
     - is_inode_flag_set(fi,..)

In order to avoid unneeded conversion, alter ADDRS_PER_PAGE and
addrs_per_inode to acept parameter with type of inode pointer.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: simplify __allocate_data_blocks
Chao Yu [Tue, 26 Jan 2016 07:38:29 +0000 (15:38 +0800)]
f2fs: simplify __allocate_data_blocks

This patch uses existing function f2fs_map_block to simplify implementation
of __allocate_data_blocks.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: simplify f2fs_map_blocks
Chao Yu [Tue, 26 Jan 2016 07:37:38 +0000 (15:37 +0800)]
f2fs: simplify f2fs_map_blocks

In f2fs_map_blocks, we use duplicated codes to handle first block mapping
and the following blocks mapping, it's unnecessary. This patch simplifies
f2fs_map_blocks to avoid using copied codes.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: introduce lifetime write IO statistics
Shuoran Liu [Wed, 27 Jan 2016 01:57:30 +0000 (09:57 +0800)]
f2fs: introduce lifetime write IO statistics

This patch introduces lifetime IO write statistics exposed to the sysfs interface.
The write IO amount is obtained from block layer, accumulated in the file system and
stored in the hot node summary of checkpoint.

Signed-off-by: Shuoran Liu <liushuoran@huawei.com>
Signed-off-by: Pengyang Hou <houpengyang@huawei.com>
[Jaegeuk Kim: add sysfs documentation]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: give scheduling point in shrinking path
Jaegeuk Kim [Tue, 19 Jan 2016 23:31:48 +0000 (07:31 +0800)]
f2fs: give scheduling point in shrinking path

It needs to give a chance to be rescheduled while shrinking slab entries.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: improve shrink performance of extent nodes
Hou Pengyang [Tue, 26 Jan 2016 12:56:26 +0000 (12:56 +0000)]
f2fs: improve shrink performance of extent nodes

On the worst case, we need to scan the whole radix tree and every rb-tree to
free the victimed extent_nodes when shrinking.

Pengyang initially introduced a victim_list to record the victimed extent_nodes,
and free these extent_nodes by just scanning a list.

Later, Chao Yu enhances the original patch to improve memory footprint by
removing victim list.

The policy of lru list shrinking becomes:
1) lock lru list's lock
2) trylock extent tree's lock
3) remove extent node from lru list
4) unlock lru list's lock
5) do shrink
6) repeat 1) to 5)

Signed-off-by: Hou Pengyang <houpengyang@huawei.com>
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: don't set cached_en if it will be freed
Jaegeuk Kim [Tue, 26 Jan 2016 17:20:05 +0000 (09:20 -0800)]
f2fs: don't set cached_en if it will be freed

If en has empty list pointer, it will be freed sooner, so we don't need to
set cached_en with it.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: move extent_node list operations being coupled with rbtree operation
Jaegeuk Kim [Tue, 26 Jan 2016 17:12:50 +0000 (09:12 -0800)]
f2fs: move extent_node list operations being coupled with rbtree operation

This patch moves extent_node list operations to be handled together with
its rbtree operations.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: reconstruct the code to free an extent_node
Hou Pengyang [Tue, 26 Jan 2016 12:56:25 +0000 (12:56 +0000)]
f2fs: reconstruct the code to free an extent_node

There are three steps to free an extent node:
1) list_del_init, 2)__detach_extent_node, 3) kmem_cache_free

In path f2fs_destroy_extent_tree, 1->2->3 to free a node,
But in path f2fs_update_extent_tree_range, it is 2->1->3.

This patch makes all the order to be: 1->2->3
It makes sense, since in the next patch, we import a victim list in the
path shrink_extent_tree, we could check if the extent_node is in the victim
list by checking the list_empty(). So it is necessary to put 1) first.

Signed-off-by: Hou Pengyang <houpengyang@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: use wq_has_sleeper for cp_wait wait_queue
Jaegeuk Kim [Tue, 26 Jan 2016 19:55:35 +0000 (11:55 -0800)]
f2fs: use wq_has_sleeper for cp_wait wait_queue

We need to use wq_has_sleeper including smp_mb to consider cp_wait concurrency.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: avoid unnecessary search while finding victim in gc
Fan Li [Wed, 3 Feb 2016 08:21:57 +0000 (16:21 +0800)]
f2fs: avoid unnecessary search while finding victim in gc

variable nsearched in get_victim_by_default() indicates the number of
dirty segments we already checked. There are 2 problems about the way
it updates:
1. When p.ofs_unit is greater than 1, the victim we find consists
   of multiple segments, possibly more than 1 dirty segment.
   But nsearched always increases by 1.
2. If segments have been found but not been chosen, nsearched won't
   increase. So even we have checked all dirty segments, nsearched
   may still less than p.max_search.
All these problems could cause unnecessary search after all dirty
segments have already been checked.

Signed-off-by: Fan li <fanofcode.li@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: delete unnecessary wait for page writeback
Yunlei He [Wed, 3 Feb 2016 02:26:13 +0000 (10:26 +0800)]
f2fs: delete unnecessary wait for page writeback

no need to wait inline file page writeback for no one
use it, so this patch delete unnecessary wait.

Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: use wait_for_stable_page to avoid contention
Jaegeuk Kim [Wed, 20 Jan 2016 15:43:51 +0000 (23:43 +0800)]
f2fs: use wait_for_stable_page to avoid contention

In write_begin, if storage supports stable_page, we don't need to wait for
writeback to update its contents.
This patch introduces to use wait_for_stable_page instead of
wait_on_page_writeback.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: enhance foreground GC
Chao Yu [Sat, 23 Jan 2016 08:23:55 +0000 (16:23 +0800)]
f2fs: enhance foreground GC

If we configure section consist of multiple segments, foreground GC will
do the garbage collection with following approach:

for each segment in victim section
blk_start_plug
for each valid block in segment
write out by OPU method
submit bio cache   <---
blk_finish_plug   <---

There are two issue:
1) for most of the time, 'submit bio cache' will break the merging in
current bio buffer from writes of next segments, making a smaller bio
submitting.
2) block plug only cover IO submitting in one segment, which reduce
opportunity of merging IOs in plug with multiple segments.

So refactor the code as below structure to strive for biggest
opportunity of merging IOs:

blk_start_plug
for each segment in victim section
for each valid block in segment
write out by OPU method
submit bio cache
blk_finish_plug

Test method:
1. mkfs.f2fs -s 8 /dev/sdX
2. touch 32 files
3. write 2M data into each file
4. punch 1.5M data from offset 0 for each file
5. trigger foreground gc through ioctl

Before patch, there are totoally 40 bios submitted.
f2fs_submit_write_bio: dev = (8,32), WRITE_SYNC, DATA, sector = 65536, size = 122880
f2fs_submit_write_bio: dev = (8,32), WRITE_SYNC, DATA, sector = 65776, size = 122880
f2fs_submit_write_bio: dev = (8,32), WRITE_SYNC, DATA, sector = 66016, size = 122880
f2fs_submit_write_bio: dev = (8,32), WRITE_SYNC, DATA, sector = 66256, size = 122880
f2fs_submit_write_bio: dev = (8,32), WRITE_SYNC, DATA, sector = 66496, size = 32768
----repeat for 8 times

After patch, there are totally 35 bios submitted.
f2fs_submit_write_bio: dev = (8,32), WRITE_SYNC, DATA, sector = 65536, size = 122880
----repeat 34 times
f2fs_submit_write_bio: dev = (8,32), WRITE_SYNC, DATA, sector = 73696, size = 16384

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: don't need to call set_page_dirty for io error
Jaegeuk Kim [Mon, 25 Jan 2016 22:31:58 +0000 (14:31 -0800)]
f2fs: don't need to call set_page_dirty for io error

If end_io gets an error, we don't need to set the page as dirty, since we
already set f2fs_stop_checkpoint which will not flush any data.

This will resolve the following warning.

======================================================
[ INFO: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected ]
4.4.0+ #9 Tainted: G           O
------------------------------------------------------
xfs_io/26773 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
 (&(&sbi->inode_lock[i])->rlock){+.+...}, at: [<ffffffffc025483f>] update_dirty_page+0x6f/0xd0 [f2fs]

and this task is already holding:
 (&(&q->__queue_lock)->rlock){-.-.-.}, at: [<ffffffff81396ea2>] blk_queue_bio+0x422/0x490
which would create a new lock dependency:
 (&(&q->__queue_lock)->rlock){-.-.-.} -> (&(&sbi->inode_lock[i])->rlock){+.+...}

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: avoid needless sync_inode_page when reading inline_data
Jaegeuk Kim [Mon, 25 Jan 2016 18:48:50 +0000 (10:48 -0800)]
f2fs: avoid needless sync_inode_page when reading inline_data

In write_begin, if there is an inline_data, f2fs loads it into 0'th data page.
Since it's the read path, we don't need to sync its inode page.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: don't need to sync node page at every time
Jaegeuk Kim [Mon, 25 Jan 2016 18:46:58 +0000 (10:46 -0800)]
f2fs: don't need to sync node page at every time

In write_end, we don't need to sync inode page at every time.
Instead, we can expect f2fs_write_inode will update later.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: avoid multiple node page writes due to inline_data
Jaegeuk Kim [Mon, 25 Jan 2016 13:57:05 +0000 (05:57 -0800)]
f2fs: avoid multiple node page writes due to inline_data

The sceanrio is:
1. create fully node blocks
2. flush node blocks
3. write inline_data for all the node blocks again
4. flush node blocks redundantly

So, this patch tries to flush inline_data when flushing node blocks.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: do f2fs_balance_fs when block is allocated
Jaegeuk Kim [Sat, 23 Jan 2016 21:35:18 +0000 (13:35 -0800)]
f2fs: do f2fs_balance_fs when block is allocated

We should consider data block allocation to trigger f2fs_balance_fs.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: fix to overcome inline_data floods
Jaegeuk Kim [Sat, 23 Jan 2016 14:00:57 +0000 (22:00 +0800)]
f2fs: fix to overcome inline_data floods

The scenario is:
1. create lots of node blocks
2. sync
3. write lots of inline_data
-> got panic due to no free space

In that case, we should flush node blocks when writing inline_data in #3,
and trigger gc as well.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: use writepages->lock for WB_SYNC_ALL
Jaegeuk Kim [Wed, 20 Jan 2016 15:46:05 +0000 (23:46 +0800)]
f2fs: use writepages->lock for WB_SYNC_ALL

If there are many writepages calls by multiple threads in background, we don't
need to serialize to merge all the bios, since it's background.
In such the case, it'd better to run writepages concurrently.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: remove needless condition check
Jaegeuk Kim [Wed, 20 Jan 2016 00:27:37 +0000 (08:27 +0800)]
f2fs: remove needless condition check

This patch removes needless condition variable.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: correct search area in get_new_segment
Chao Yu [Fri, 22 Jan 2016 09:42:06 +0000 (17:42 +0800)]
f2fs: correct search area in get_new_segment

get_new_segment starts from current segment position, tries to search a
free segment among its right neighbors locate in same section.

But previously our search area was set as [current segment, max segment],
which means we have to search to more bits in free_segmap bitmap for some
worse cases. So here we correct the search area to [current segment, last
segment in section] to avoid unnecessary searching.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: export dirty_nats_ratio in sysfs
Chao Yu [Mon, 18 Jan 2016 10:32:58 +0000 (18:32 +0800)]
f2fs: export dirty_nats_ratio in sysfs

This patch exports a new sysfs entry 'dirty_nat_ratio' to control threshold
of dirty nat entries, if current ratio exceeds configured threshold,
checkpoint will be triggered in f2fs_balance_fs_bg for flushing dirty nats.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: flush dirty nat entries when exceeding threshold
Chao Yu [Mon, 18 Jan 2016 10:31:18 +0000 (18:31 +0800)]
f2fs: flush dirty nat entries when exceeding threshold

When testing f2fs with xfstest, generic/251 is stuck for long time,
the case uses below serials to obtain fresh released space in device,
in order to prepare for following fstrim test.

1. rm -rf /mnt/dir
2. mkdir /mnt/dir/
3. cp -axT `pwd`/ /mnt/dir/
4. goto 1

During preparing step, all nat entries will be cached in nat cache,
most of them are dirty entries with invalid blkaddr, which means
nodes related to these entries have been truncated, and they could
be reused after the dirty entries been checkpointed.

However, there was no checkpoint been triggered, so nid allocators
(e.g. mkdir, creat) will run into long journey of iterating all NAT
pages, looking for free nids in alloc_nid->build_free_nids.

Here, in f2fs_balance_fs_bg we give another chance to do checkpoint
to flush nat entries for reusing them in free nid cache when dirty
entry count exceeds 10% of max count.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agof2fs: relocate is_merged_page
Chao Yu [Mon, 18 Jan 2016 10:24:59 +0000 (18:24 +0800)]
f2fs: relocate is_merged_page

Operations in is_merged_page is related to inner bio cache, move it to
data.c.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
8 years agoMerge tag 'trace-fixes-v4.5-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 22 Feb 2016 22:09:18 +0000 (14:09 -0800)]
Merge tag 'trace-fixes-v4.5-rc5' of git://git./linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "Two more small fixes.

  One is by Yang Shi who added a READ_ONCE_NOCHECK() to the scan of the
  stack made by the stack tracer.  As the stack tracer scans the entire
  kernel stack, KASAN triggers seeing it as a "stack out of bounds"
  error.  As the scan is looking at the contents of the stack from
  parent functions.  The NOCHECK() tells KASAN that this is done on
  purpose, and is not some kind of stack overflow.

  The second fix is to the ftrace selftests, to retrieve the PID of
  executed commands from the shell with '$!' and not by parsing 'jobs'"

* tag 'trace-fixes-v4.5-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing, kasan: Silence Kasan warning in check_stack of stack_tracer
  ftracetest: Fix instance test to use proper shell command for pids

8 years agoMerge tag 'for-linus-4.5-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 22 Feb 2016 21:57:01 +0000 (13:57 -0800)]
Merge tag 'for-linus-4.5-rc5-tag' of git://git./linux/kernel/git/xen/tip

Pull xen bug fixes from David Vrabel:

 - Two scsiback fixes (resource leak and spurious warning).

 - Fix DMA mapping of compound pages on arm/arm64.

 - Fix some pciback regressions in MSI-X handling.

 - Fix a pcifront crash due to some uninitialize state.

* tag 'for-linus-4.5-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/pcifront: Fix mysterious crashes when NUMA locality information was extracted.
  xen/pcifront: Report the errors better.
  xen/pciback: Save the number of MSI-X entries to be copied later.
  xen/pciback: Check PF instead of VF for PCI_COMMAND_MEMORY
  xen: fix potential integer overflow in queue_reply
  xen/arm: correctly handle DMA mapping of compound pages
  xen/scsiback: avoid warnings when adding multiple LUNs to a domain
  xen/scsiback: correct frontend counting

8 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Mon, 22 Feb 2016 20:18:07 +0000 (12:18 -0800)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:
 "Looks like a lot, but mostly driver fixes scattered all over as usual.

  Of note:

   1) Add conditional sched in nf conntrack in cleanup to avoid NMI
      watchdogs.  From Florian Westphal.

   2) Fix deadlock in nfnetlink cttimeout, also from Floarian.

   3) Fix handling of slaves in bonding ARP monitor validation, from Jay
      Vosburgh.

   4) Callers of ip_cmsg_send() are responsible for freeing IP options,
      some were not doing so.  Fix from Eric Dumazet.

   5) Fix per-cpu bugs in mvneta driver, from Gregory CLEMENT.

   6) Fix vlan handling in mv88e6xxx DSA driver, from Vivien Didelot.

   7) bcm7xxx PHY driver bug fixes from Florian Fainelli.

   8) Avoid unaligned accesses to protocol headers wrt.  GRE, from
      Alexander Duyck.

   9) SKB leaks and other problems in arc_emac driver, from Alexander
      Kochetkov.

  10) tcp_v4_inbound_md5_hash() releases listener socket instead of
      request socket on error path, oops.  Fix from Eric Dumazet.

  11) Missing socket release in pppoe_rcv_core() that seems to have
      existed basically forever.  From Guillaume Nault.

  12) Missing slave_dev unregister in dsa_slave_create() error path,
      from Florian Fainelli.

  13) crypto_alloc_hash() never returns NULL, fix return value check in
      __tcp_alloc_md5sig_pool.  From Insu Yun.

  14) Properly expire exception route entries in ipv4, from Xin Long.

  15) Fix races in tcp/dccp listener socket dismantle, from Eric
      Dumazet.

  16) Don't set IFF_TX_SKB_SHARING in vxlan, geneve, or GRE, it's not
      legal.  These drivers modify the SKB on transmit.  From Jiri Benc.

  17) Fix regression in the initialziation of netdev->tx_queue_len.
      From Phil Sutter.

  18) Missing unlock in tipc_nl_add_bc_link() error path, from Insu Yun.

  19) SCTP port hash sizing does not properly ensure that table is a
      power of two in size.  From Neil Horman.

  20) Fix initializing of software copy of MAC address in fmvj18x_cs
      driver, from Ken Kawasaki"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (129 commits)
  bnx2x: Fix 84833 phy command handler
  bnx2x: Fix led setting for 84858 phy.
  bnx2x: Correct 84858 PHY fw version
  bnx2x: Fix 84833 RX CRC
  bnx2x: Fix link-forcing for KR2
  net: ethernet: davicom: fix devicetree irq resource
  fmvj18x_cs: fix incorrect indexing of dev->dev_addr[] when copying the MAC address
  Driver: Vmxnet3: Update Rx ring 2 max size
  net: netcp: rework the code for get/set sw_data in dma desc
  soc: ti: knav_dma: rename pad in struct knav_dma_desc to sw_data
  net: ti: netcp: restore get/set_pad_info() functionality
  MAINTAINERS: Drop myself as xen netback maintainer
  sctp: Fix port hash table size computation
  can: ems_usb: Fix possible tx overflow
  Bluetooth: hci_core: Avoid mixing up req_complete and req_complete_skb
  net: bcmgenet: Fix internal PHY link state
  af_unix: Don't use continue to re-execute unix_stream_read_generic loop
  unix_diag: fix incorrect sign extension in unix_lookup_by_ino
  bnxt_en: Failure to update PHY is not fatal condition.
  bnxt_en: Remove unnecessary call to update PHY settings.
  ...

8 years agoMerge tag 'hwmon-for-linus-v4.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 22 Feb 2016 20:12:46 +0000 (12:12 -0800)]
Merge tag 'hwmon-for-linus-v4.5-rc6' of git://git./linux/kernel/git/groeck/linux-staging

Pull hwmon fixes from Guenter Roeck:
 "Two fixes headed for stable:

   - Remove an unnecessary speed_index lookup for thermal hook in the
     gpio-fan driver.  The unnecessary speed lookup can hog the system.

   - Handle negative conversion values correctly in the ads1015 driver"

* tag 'hwmon-for-linus-v4.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (gpio-fan) Remove un-necessary speed_index lookup for thermal hook
  hwmon: (ads1015) Handle negative conversion values correctly

8 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Linus Torvalds [Mon, 22 Feb 2016 20:04:11 +0000 (12:04 -0800)]
Merge tag 'for-linus' of git://git./linux/kernel/git/dledford/rdma

Pull rdma fixes from Doug Ledford:
 "One ocrdma fix:

   - The new CQ API support was added to ocrdma, but they got the arming
     logic wrong, so without this, transfers eventually fail when they
     fail to arm the interrupt properly under load

  Two related fixes for mlx4:

   - When we added the 64bit extended counters support to the core IB
     code, they forgot to update the RoCE side of the mlx4 driver (the
     IB side they properly updated).

     I debated whether or not to include these patches as they could be
     considered feature enablement patches, but the existing code will
     blindy copy the 32bit counters, whether any counters were requested
     at all (a bug).

     These two patches make it (a) check to see that counters were
     requested and (b) copy the right counters (the 64bit support is
     new, the 32bit is not).  For that reason I went ahead and took
     them"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
  IB/mlx4: Add support for the port info class for RoCE ports
  IB/mlx4: Add support for extended counters over RoCE ports
  RDMA/ocrdma: Fix arm logic to align with new cq API

8 years agoMerge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...
Linus Torvalds [Mon, 22 Feb 2016 19:55:18 +0000 (11:55 -0800)]
Merge branch 'i2c/for-current' of git://git./linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "Some bugfixes from I2C for you:

  A fix for a RuntimePM regression with OMAP, a fix to enable TCO for
  Lewisburg platforms, and a typo fix while we are here"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: i801: Adding Intel Lewisburg support for iTCO
  i2c: uniphier: fix typos in error messages
  i2c: omap: Fix PM regression with deferred probe for pm_runtime_reinit

8 years agoMerge tag 'linux-can-fixes-for-4.5-20160221' of git://git.kernel.org/pub/scm/linux...
David S. Miller [Mon, 22 Feb 2016 03:51:55 +0000 (22:51 -0500)]
Merge tag 'linux-can-fixes-for-4.5-20160221' of git://git./linux/kernel/git/mkl/linux-can

Marc Kleine-Budde says:

====================
pull-request: can 2016-02-21

this is a pull reqeust of one patch for net/master.

The patch is by Gerhard Uttenthaler and fixes a potential tx overflow in the
ems_usb driver.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'bnx2x-848xx-phy-fixes'
David S. Miller [Mon, 22 Feb 2016 03:50:55 +0000 (22:50 -0500)]
Merge branch 'bnx2x-848xx-phy-fixes'

Yuval Mintz says:

====================
bnx2x: Fix 848xx phys

This series contains link-related fixes, mostly for the 848xx phys
[2 patches are for 84833, and 2 patches are for 84858].
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnx2x: Fix 84833 phy command handler
Yuval Mintz [Sun, 21 Feb 2016 13:07:29 +0000 (15:07 +0200)]
bnx2x: Fix 84833 phy command handler

Current initialization sequence is lacking, causing some configurations
to fail.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnx2x: Fix led setting for 84858 phy.
Yuval Mintz [Sun, 21 Feb 2016 13:07:28 +0000 (15:07 +0200)]
bnx2x: Fix led setting for 84858 phy.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnx2x: Correct 84858 PHY fw version
Yuval Mintz [Sun, 21 Feb 2016 13:07:27 +0000 (15:07 +0200)]
bnx2x: Correct 84858 PHY fw version

The phy's firmware version isn't being parsed properly as it's
currently parsed like the rest of the 848xx phys.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnx2x: Fix 84833 RX CRC
Yuval Mintz [Sun, 21 Feb 2016 13:07:26 +0000 (15:07 +0200)]
bnx2x: Fix 84833 RX CRC

There's a problem in current 84833 phy configuration -
in case 1Gb link is configured and jumbo-sized packets are being
used, device will experience RX crc errors.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnx2x: Fix link-forcing for KR2
Yuval Mintz [Sun, 21 Feb 2016 13:07:25 +0000 (15:07 +0200)]
bnx2x: Fix link-forcing for KR2

Currently, when link is using KR2 it cannot be forced to any speed other
than 20g.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.om>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetoot...
David S. Miller [Mon, 22 Feb 2016 03:46:26 +0000 (22:46 -0500)]
Merge branch 'for-upstream' of git://git./linux/kernel/git/bluetooth/bluetooth

Johan Hedberg says:

====================
pull request: bluetooth 2016-02-20

Here's an important patch for 4.5 which fixes potential invalid pointer
access when processing completed Bluetooth HCI commands.

Please let me know if there are any issues pulling. Thanks.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: ethernet: davicom: fix devicetree irq resource
Robert Jarzmik [Sat, 20 Feb 2016 20:45:26 +0000 (21:45 +0100)]
net: ethernet: davicom: fix devicetree irq resource

The dm9000 driver doesn't work in at least one device-tree
configuration, spitting an error message on irq resource :
[    1.062495] dm9000 8000000.ethernet: insufficient resources
[    1.068439] dm9000 8000000.ethernet: not found (-2).
[    1.073451] dm9000: probe of 8000000.ethernet failed with error -2

The reason behind is that the interrupt might be provided by a gpio
controller, not probed when dm9000 is probed, and needing the probe
deferral mechanism to apply.

Currently, the interrupt is directly taken from resources. This patch
changes this to use the more generic platform_get_irq(), which handles
the deferral.

Moreover, since commit Fixes: 7085a7401ba5 ("drivers: platform: parse
IRQ flags from resources"), the interrupt trigger flags are honored in
platform_get_irq(), so remove the needless code in dm9000.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Acked-by: Marcel Ziswiler <marcel@ziswiler.com>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Tested-by: Sergei Ianovich <ynvich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agofmvj18x_cs: fix incorrect indexing of dev->dev_addr[] when copying the MAC address
Ken Kawasaki [Sat, 20 Feb 2016 10:14:36 +0000 (19:14 +0900)]
fmvj18x_cs: fix incorrect indexing of dev->dev_addr[] when copying the MAC address

fix incorrect indexing of dev->dev_addr[] when copying the MAC address
of FMV-J182 at buf[5].

Signed-off-by: Ken Kawasaki <ken_kawasaki@nifty.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoDriver: Vmxnet3: Update Rx ring 2 max size
Shrikrishna Khare [Fri, 19 Feb 2016 19:19:52 +0000 (11:19 -0800)]
Driver: Vmxnet3: Update Rx ring 2 max size

Device emulation supports max size of 4096.

Signed-off-by: Shrikrishna Khare <skhare@vmware.com>
Signed-off-by: Bhavesh Davda <bhavesh@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'netcp-fixes'
David S. Miller [Mon, 22 Feb 2016 03:03:21 +0000 (22:03 -0500)]
Merge branch 'netcp-fixes'

Murali Karicheri says:

====================
net: ti: netcp: restore get/set_pad_info() functionality

This series fixes a regression and add some improvements for the ease
of maintainance. Incorporated comments against v1.

Changelogs:

 v2 : combined 2-3 into one patch as this involves a header change
      fixed a parse warning in 3/4 per comment from Arnd.
      Removed Sign-off from Arnd against 1/4
      added comments in 3/3 to alert on the usage of sw data per review
      comments
 v1 : added 2-4 to accomodate feedback received from review
 v0 : initial version to fix the regression (From Grygorii)
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: netcp: rework the code for get/set sw_data in dma desc
Karicheri, Muralidharan [Fri, 19 Feb 2016 17:58:44 +0000 (12:58 -0500)]
net: netcp: rework the code for get/set sw_data in dma desc

SW data field in descriptor can be used by software to hold private
data for the driver. As there are 4 words available for this purpose,
use separate macros to place it or retrieve the same to/from
descriptors. Also do type cast of data types accordingly.

Cc: Wingman Kwok <w-kwok2@ti.com>
Cc: Mugunthan V N <mugunthanvnm@ti.com>
CC: Arnd Bergmann <arnd@arndb.de>
CC: Grygorii Strashko <grygorii.strashko@ti.com>
CC: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosoc: ti: knav_dma: rename pad in struct knav_dma_desc to sw_data
Karicheri, Muralidharan [Fri, 19 Feb 2016 17:58:43 +0000 (12:58 -0500)]
soc: ti: knav_dma: rename pad in struct knav_dma_desc to sw_data

Rename the pad to sw_data as per description of this field in the hardware
spec(refer sprugr9 from www.ti.com). Latest version of the document is
at http://www.ti.com/lit/ug/sprugr9h/sprugr9h.pdf and section 3.1
Host Packet Descriptor describes this field.

Define and use a constant for the size of sw_data field similar to
other fields in the struct for desc and document the sw_data field
in the header. As the sw_data is not touched by hw, it's type can be
changed to u32.

Rename the helpers to match with the updated dma desc field sw_data.

Cc: Wingman Kwok <w-kwok2@ti.com>
Cc: Mugunthan V N <mugunthanvnm@ti.com>
CC: Arnd Bergmann <arnd@arndb.de>
CC: Grygorii Strashko <grygorii.strashko@ti.com>
CC: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: ti: netcp: restore get/set_pad_info() functionality
Karicheri, Muralidharan [Fri, 19 Feb 2016 17:58:42 +0000 (12:58 -0500)]
net: ti: netcp: restore get/set_pad_info() functionality

The commit 899077791403 ("netcp: try to reduce type confusion in
descriptors") introduces a regression in Kernel 4.5-rc1 and it breaks
get/set_pad_info() functionality.

The TI NETCP driver uses pad0 and pad1 fields of knav_dma_desc to
store DMA/MEM buffer pointer and buffer size respectively. And in both
cases for Keystone 2 the pointer type size is 32 bit regardless of
LAPE enabled or not, because CONFIG_ARCH_DMA_ADDR_T_64BIT originally
is not expected to be defined.

Unfortunately, above commit changed buffer's pointers save/restore
code (get/set_pad_info()) and added intermediate conversation to u64
which works incorrectly on 32bit Keystone 2 and causes TI NETCP driver
crash in RX/TX path due to "Unable to handle kernel NULL pointer"
exception. This issue was reported and discussed in [1].

Hence, fix it by partially reverting above commit and restoring
get/set_pad_info() functionality as it was before.

[1] https://www.mail-archive.com/netdev@vger.kernel.org/msg95361.html
Cc: Wingman Kwok <w-kwok2@ti.com>
Cc: Mugunthan V N <mugunthanvnm@ti.com>
CC: David Laight <David.Laight@ACULAB.COM>
CC: Arnd Bergmann <arnd@arndb.de>
Reported-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMAINTAINERS: Drop myself as xen netback maintainer
Ian Campbell [Fri, 19 Feb 2016 11:44:51 +0000 (11:44 +0000)]
MAINTAINERS: Drop myself as xen netback maintainer

Wei has been picking this up for quite a while now.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosctp: Fix port hash table size computation
Neil Horman [Thu, 18 Feb 2016 21:10:57 +0000 (16:10 -0500)]
sctp: Fix port hash table size computation

Dmitry Vyukov noted recently that the sctp_port_hashtable had an error in
its size computation, observing that the current method never guaranteed
that the hashsize (measured in number of entries) would be a power of two,
which the input hash function for that table requires.  The root cause of
the problem is that two values need to be computed (one, the allocation
order of the storage requries, as passed to __get_free_pages, and two the
number of entries for the hash table).  Both need to be ^2, but for
different reasons, and the existing code is simply computing one order
value, and using it as the basis for both, which is wrong (i.e. it assumes
that ((1<<order)*PAGE_SIZE)/sizeof(bucket) is still ^2 when its not).

To fix this, we change the logic slightly.  We start by computing a goal
allocation order (which is limited by the maximum size hash table we want
to support.  Then we attempt to allocate that size table, decreasing the
order until a successful allocation is made.  Then, with the resultant
successful order we compute the number of buckets that hash table supports,
which we then round down to the nearest power of two, giving us the number
of entries the table actually supports.

I've tested this locally here, using non-debug and spinlock-debug kernels,
and the number of entries in the hashtable consistently work out to be
powers of two in all cases.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
CC: Dmitry Vyukov <dvyukov@google.com>
CC: Vladislav Yasevich <vyasevich@gmail.com>
CC: "David S. Miller" <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>