Don't define F2FS_IOC_* aliases to ioctls that already have a generic
FS_IOC_* name.  These aliases are unnecessary, and they make it unclear
which ioctls are f2fs-specific and which are generic.
Signed-off-by: NEric Biggers <ebiggers@google.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

meta inode's pages are used for encrypted, verity and compressed blocks,
so the meta inode's cache invalidation condition in do_checkpoint() should
consider compression as well, not just for verity and encryption, fix it.
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

- don't panic kernel if f2fs_get_node_page() fails in
f2fs_recover_inline_data() or f2fs_recover_inline_xattr();
- return error number of f2fs_truncate_blocks() to
f2fs_recover_inline_data()'s caller;
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

f2fs will try compressing data in cluster only when "all logical
blocks in cluster contain valid data" rather than "all logical
blocks in file are valid".
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

like we did for encrypted page.
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

Fuzzing main_blkaddr sysfs node will corrupt this field's value,
causing kernel panic, remove its write attribute to avoid potential
security risk.

[Chao Yu: add description]
Signed-off-by: NDehe Gu <gudehe@huawei.com>
Signed-off-by: NDaiyue Zhang <zhangdaiyue1@huawei.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

Added a new gc_urgent mode, GC_URGENT_LOW, in which mode
F2FS will lower the bar of checking idle in order to
process outstanding discard commands and GC a little bit
aggressively.
Signed-off-by: NDaeho Jeong <daehojeong@google.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

If two readahead threads having same offset enter in readpages, every read
IOs are split and issued to the disk which giving lower bandwidth.

This patch tries to avoid redundant readahead calls.

Fixes one build error reported by Randy.
Fix build error when F2FS_FS_COMPRESSION is not set/enabled.
This label is needed in either case.

../fs/f2fs/data.c: In function ‘f2fs_mpage_readpages’:
../fs/f2fs/data.c:2327:5: error: label ‘next_page’ used but not defined
     goto next_page;
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

If f2fs_grab_cache_page() fails, it needs to return -ENOMEM.
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

The parameter op_flag is not used in f2fs_get_read_data_page(),
but it is used in f2fs_grab_read_bio(). Obviously, op_flag is
not passed to f2fs_grab_read_bio() successfully. We need to add
parameter in f2fs_submit_page_read() to pass it.

The case:
- gc_data_segment
 - f2fs_get_read_data_page(.., op_flag = REQ_RAHEAD,..)
  - f2fs_submit_page_read
   - f2fs_grab_read_bio(.., op_flag = 0, ..)
Signed-off-by: NJia Yang <jiayang5@huawei.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

to two independent functions:
- f2fs_allocate_new_segment() for specified type segment allocation
- f2fs_allocate_new_segments() for all data type segments allocation
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

if get_node_path() return -E2BIG and trace of
f2fs_truncate_inode_blocks_enter/exit enabled
then the matching-pair of trace_exit will lost
in log.
Signed-off-by: NYubo Feng <fengyubo3@huawei.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

This patch is to fix a crash:

 #3 [ffffb6580689f898] oops_end at ffffffffa2835bc2
 #4 [ffffb6580689f8b8] no_context at ffffffffa28766e7
 #5 [ffffb6580689f920] async_page_fault at ffffffffa320135e
    [exception RIP: f2fs_is_compressed_page+34]
    RIP: ffffffffa2ba83a2  RSP: ffffb6580689f9d8  RFLAGS: 00010213
    RAX: 0000000000000001  RBX: fffffc0f50b34bc0  RCX: 0000000000002122
    RDX: 0000000000002123  RSI: 0000000000000c00  RDI: fffffc0f50b34bc0
    RBP: ffff97e815a40178   R8: 0000000000000000   R9: ffff97e83ffc9000
    R10: 0000000000032300  R11: 0000000000032380  R12: ffffb6580689fa38
    R13: fffffc0f50b34bc0  R14: ffff97e825cbd000  R15: 0000000000000c00
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
 #6 [ffffb6580689f9d8] __is_cp_guaranteed at ffffffffa2b7ea98
 #7 [ffffb6580689f9f0] f2fs_submit_page_write at ffffffffa2b81a69
 #8 [ffffb6580689fa30] f2fs_do_write_meta_page at ffffffffa2b99777
 #9 [ffffb6580689fae0] __f2fs_write_meta_page at ffffffffa2b75f1a
 #10 [ffffb6580689fb18] f2fs_sync_meta_pages at ffffffffa2b77466
 #11 [ffffb6580689fc98] do_checkpoint at ffffffffa2b78e46
 #12 [ffffb6580689fd88] f2fs_write_checkpoint at ffffffffa2b79c29
 #13 [ffffb6580689fdd0] f2fs_sync_fs at ffffffffa2b69d95
 #14 [ffffb6580689fe20] sync_filesystem at ffffffffa2ad2574
 #15 [ffffb6580689fe30] generic_shutdown_super at ffffffffa2a9b582
 #16 [ffffb6580689fe48] kill_block_super at ffffffffa2a9b6d1
 #17 [ffffb6580689fe60] kill_f2fs_super at ffffffffa2b6abe1
 #18 [ffffb6580689fea0] deactivate_locked_super at ffffffffa2a9afb6
 #19 [ffffb6580689feb8] cleanup_mnt at ffffffffa2abcad4
 #20 [ffffb6580689fee0] task_work_run at ffffffffa28bca28
 #21 [ffffb6580689ff00] exit_to_usermode_loop at ffffffffa28050b7
 #22 [ffffb6580689ff38] do_syscall_64 at ffffffffa280560e
 #23 [ffffb6580689ff50] entry_SYSCALL_64_after_hwframe at ffffffffa320008c

This occurred when umount f2fs if enable F2FS_FS_COMPRESSION
with F2FS_IO_TRACE. Fixes it by adding IS_IO_TRACED_PAGE to check
validity of pid for page_private.
Signed-off-by: NYu Changchun <yuchangchun1@huawei.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

In the f2fs_unlink we do not add trace end for some
error paths, just add.
Signed-off-by: NLihong Kou <koulihong@huawei.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

In f2fs_write_raw_pages(), we need to check page dirty status before
writeback, because there could be a racer (e.g. reclaimer) helps
writebacking the dirty page.
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

The parameter compr is unused in the f2fs_cluster_blocks function
so we no longer need to pass it as a parameter.
Signed-off-by: NWang Xiaojun <wangxiaojun11@huawei.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

to show f2fs_fiemap()'s result as below:

f2fs_fiemap: dev = (251,0), ino = 7, lblock:0, pblock:1625292800, len:2097152, flags:0, ret:0
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

to show f2fs_bmap()'s result as below:

f2fs_bmap: dev = (251,0), ino = 7, lblock:0, pblock:396800
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

If compression is disable, we should return zero rather than -EOPNOTSUPP
to indicate f2fs_bmap() is not supported.
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

In current version, @state will only be FREE_NID. This parameter
has no real effect so remove it to keep clean.
Signed-off-by: NLiu Song <liu.song11@zte.com.cn>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

stakable/stackable
Signed-off-by: NLiu Song <fishland@aliyun.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

Filesystem including f2fs should support stable page for special
device like software raid, however there is one missing path that
page could be updated while it is writeback state as below, fix
this.

- gc_node_segment
 - f2fs_move_node_page
  - __write_node_page
   - set_page_writeback

- do_read_inode
 - f2fs_init_extent_tree
  - __f2fs_init_extent_tree
    i_ext->len = 0;
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

- Add to account and show per-log dirty_seg, full_seg and valid_blocks
in debugfs.
- reformat printed info.

    TYPE            segno    secno   zoneno  dirty_seg   full_seg  valid_blk
  - COLD   data:     1523     1523     1523          1          0        399
  - WARM   data:      769      769      769         20        255     133098
  - HOT    data:      767      767      767          9          0        167
  - Dir   dnode:       22       22       22          3          0         70
  - File  dnode:      722      722      722         14         10       6505
  - Indir nodes:        2        2        2          1          0          3
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

When f2fs_ioc_gc_range performs multiple segments gc ops, the return
value of f2fs_ioc_gc_range is determined by the last segment gc ops.
If its ops failed, the f2fs_ioc_gc_range will be considered to be failed
despite some of previous segments gc ops succeeded. Therefore, so we
fix: Redefine the return value of getting victim ops and add exception
handle for f2fs_gc. In particular, 1).if target has no valid block, it
will go on. 2).if target sectoion has valid block(s), but it is current
section, we will reminder the caller.
Signed-off-by: NQilong Zhang <zhangqilong3@huawei.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

Use validation of @fio to inidcate whether caller want to serialize IOs
in io.io_list or not, then @add_list will be redundant, remove it.
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

- to avoid race between checkpoint and quota file writeback, it
just needs to hold read lock of node_write in writeback path.
- node_write lock has covered all LFS data write paths, it's not
necessary, we only need to hold node_write lock at write path of
quota file.

This refactors commit ca7f76e6 ("f2fs: fix wrong discard space").
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

There is one reserved special compression extension: '*', which
could be set via 'compress_extension="*"' mount option to enable
compression for all files.
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

to avoid polluting global symbol namespace.
Signed-off-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

Use kfree() instead of kvfree() to free variables allocated
by match_strdup(). Because the memory is allocated with kmalloc
inside match_strdup().
Signed-off-by: NWang Xiaojun <wangxiaojun11@huawei.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

Assume each section has 4 segment:
     .___________________________.
     |_Segment0_|_..._|_Segment3_|
     .                          .
     .                  .
     .__________.
     |_section0_|

Segment 0~2 has 0 valid block, segment 3 has 512 valid blocks.
It will fail if we want to gc section0 in this scenes,
because all 4 segments in section0 is not dirty.
So we should use dirty section bitmap instead of dirty segment bitmap
to get right victim section.
Signed-off-by: NJack Qiu <jack.qiu@huawei.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

Under some condition, the __write_node_page will submit a page which is not
f2fs_in_warm_node_list and will not call f2fs_add_fsync_node_entry.
f2fs_gc continue to run to invoke f2fs_iget -> do_read_inode to read the same node page
and set code node, which make f2fs_in_warm_node_list become true,
that will cause f2fs_bug_on in f2fs_del_fsync_node_entry when f2fs_write_end_io called.

- f2fs_write_end_io
					- f2fs_iget
					 - do_read_inode
					  - set_cold_node
					  recover cold node flag
 - f2fs_in_warm_node_list
  - is_cold_node
  if node is cold, assume we have added
  node to fsync_node_list during writepages()
 - f2fs_del_fsync_node_entry
  - f2fs_bug_on() due to node page
  is not in fsync_node_list

[   34.966133] Call trace:
[   34.969902]  f2fs_del_fsync_node_entry+0x100/0x108
[   34.976071]  f2fs_write_end_io+0x1e0/0x288
[   34.981539]  bio_endio+0x248/0x270
[   34.986289]  blk_update_request+0x2b0/0x4d8
[   34.991841]  scsi_end_request+0x40/0x440
[   34.997126]  scsi_io_completion+0xa4/0x748
[   35.002593]  scsi_finish_command+0xdc/0x110
[   35.008143]  scsi_softirq_done+0x118/0x150
[   35.013610]  blk_done_softirq+0x8c/0xe8
[   35.018811]  __do_softirq+0x2e8/0x578
[   35.023828]  irq_exit+0xfc/0x120
[   35.028398]  handle_IPI+0x1d8/0x330
[   35.033233]  gic_handle_irq+0x110/0x1d4
[   35.038433]  el1_irq+0xb4/0x130
[   35.042917]  kmem_cache_alloc+0x3f0/0x418
[   35.048288]  radix_tree_node_alloc+0x50/0xf8
[   35.053933]  __radix_tree_create+0xf8/0x188
[   35.059484]  __radix_tree_insert+0x3c/0x128
[   35.065035]  add_gc_inode+0x90/0x118
[   35.069967]  f2fs_gc+0x1b80/0x2d70
[   35.074718]  f2fs_disable_checkpoint+0x94/0x1d0
[   35.080621]  f2fs_fill_super+0x10c4/0x1b88
[   35.086088]  mount_bdev+0x194/0x1e0
[   35.090923]  f2fs_mount+0x40/0x50
[   35.095589]  mount_fs+0xb4/0x190
[   35.100159]  vfs_kern_mount+0x80/0x1d8
[   35.105260]  do_mount+0x478/0xf18
[   35.109926]  ksys_mount+0x90/0xd0
[   35.114592]  __arm64_sys_mount+0x24/0x38
Signed-off-by: NWuyun Zhao <zhaowuyun@wingtech.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

Since offset < new_size, no need to do truncate_pagecache() again
with new_size.
Signed-off-by: NWei Fang <fangwei1@huawei.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

Use kfree() instead of kvfree() to free super in read_raw_super_block()
because the memory is allocated with kzalloc() in the function.
Use kfree() instead of kvfree() to free sbi, raw_super in
f2fs_fill_super() and f2fs_put_super() because the memory is allocated
with kzalloc().
Signed-off-by: NDenis Efremov <efremov@linux.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

ERROR:INITIALISED_STATIC: do not initialise statics to NULL
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

Pull epoll update from Al Viro:
 "epoll conversion to read_iter from Jens; I thought there might be more
  epoll stuff this cycle, but uaccess took too much time"

* 'work.epoll' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  eventfd: convert to f_op->read_iter()

Pull vfs fixes from Al Viro:
 "A couple of trivial patches that fell through the cracks last cycle"

* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fs: fix indentation in deactivate_super()
  vfs: Remove duplicated d_mountpoint check in __is_local_mountpoint

Pull sysctl fixes from Al Viro:
 "Fixups to regressions in sysctl series"

* 'work.sysctl' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  sysctl: reject gigantic reads/write to sysctl files
  cdrom: fix an incorrect __user annotation on cdrom_sysctl_info
  trace: fix an incorrect __user annotation on stack_trace_sysctl
  random: fix an incorrect __user annotation on proc_do_entropy
  net/sysctl: remove leftover __user annotations on neigh_proc_dointvec*
  net/sysctl: use cpumask_parse in flow_limit_cpu_sysctl

Pull i915 uaccess updates from Al Viro:
 "Low-hanging fruit in i915; there are several trickier followups, but
  that'll wait for the next cycle"

* 'uaccess.i915' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  i915:get_engines(): get rid of pointless access_ok()
  i915: alloc_oa_regs(): get rid of pointless access_ok()
  i915 compat ioctl(): just use drm_ioctl_kernel()
  i915: switch copy_perf_config_registers_or_number() to unsafe_put_user()
  i915: switch query_{topology,engine}_info() to copy_to_user()

Pull misc uaccess updates from Al Viro:
 "Assorted uaccess patches for this cycle - the stuff that didn't fit
  into thematic series"

* 'uaccess.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  bpf: make bpf_check_uarg_tail_zero() use check_zeroed_user()
  x86: kvm_hv_set_msr(): use __put_user() instead of 32bit __clear_user()
  user_regset_copyout_zero(): use clear_user()
  TEST_ACCESS_OK _never_ had been checked anywhere
  x86: switch cp_stat64() to unsafe_put_user()
  binfmt_flat: don't use __put_user()
  binfmt_elf_fdpic: don't use __... uaccess primitives
  binfmt_elf: don't bother with __{put,copy_to}_user()
  pselect6() and friends: take handling the combined 6th/7th args into helper

Pull proc fix from Eric Biederman:
 "Syzbot found a NULL pointer dereference if kzalloc of s_fs_info fails"

* 'proc-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  proc: s_fs_info may be NULL when proc_kill_sb is called