Commit Graph

561469 Commits

Author SHA1 Message Date
Chao Yu
c34f42e2cb f2fs: report error of do_checkpoint
do_checkpoint and write_checkpoint can fail due to reasons like triggering
in a readonly fs or encountering IO error of storage device.

So it's better to report such error info to user, let user be aware of
failure of doing checkpoint.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-30 10:14:09 -08:00
Jaegeuk Kim
2a34076070 f2fs: call f2fs_balance_fs only when node was changed
If user tries to update or read data, we don't need to call f2fs_balance_fs
which triggers f2fs_gc, which increases unnecessary long latency.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-30 10:14:09 -08:00
Chao Yu
3104af35eb f2fs: reduce covered region of sbi->cp_rwsem in f2fs_map_blocks
Only cover sbi->cp_rwsem on one dnode page's allocation and modification
instead of multiple's in f2fs_map_blocks, it can reduce the covered region
of cp_rwsem, then we can avoid potential long time delay for concurrent
checkpointer.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-30 10:14:08 -08:00
Jaegeuk Kim
93bae099ea f2fs: record node block allocation in dnode_of_data
This patch introduces recording node block allocation in dnode_of_data.
This information helps to figure out whether any node block is allocated during
specific file operations.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-30 10:14:07 -08:00
Jaegeuk Kim
00623e6bcf f2fs: avoid unnecessary f2fs_gc for dir operations
The f2fs_balance_fs doesn't need to cover f2fs_new_inode or f2fs_find_entry
works.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-30 10:14:06 -08:00
Jaegeuk Kim
b9d777b85f f2fs: check inline_data flag at converting time
We can check inode's inline_data flag  when calling to convert it.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-30 10:14:05 -08:00
Jaegeuk Kim
74fd8d9927 f2fs: speed up shrinking extent tree entries
If there is no candidates for shrinking slab entries, we don't need to traverse
any trees at all.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
[Jaegeuk Kim: fix missing initialization reported by Yunlei He]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-30 10:13:00 -08:00
Jaegeuk Kim
7441ccef33 f2fs: use atomic variable for total_extent_tree
It would be better to use atomic variable for total_extent_tree.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-22 10:31:41 -08:00
Chao Yu
4cf185379b f2fs: add a tracepoint for sync_dirty_inodes
This patch adds a tracepoint for sync_dirty_inodes.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-17 09:55:27 -08:00
Fan Li
7df3a4318d f2fs: optimize the flow of f2fs_map_blocks
check map->m_len right after it changes to avoid excess call
to update dnode_of_data.

Signed-off-by: Fan li <fanofcode.li@samsung.com>
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-17 09:54:42 -08:00
Chao Yu
36b35a0dbe f2fs: support data flush in background
Previously, when finishing a checkpoint, we have persisted all fs meta
info including meta inode, node inode, dentry page of directory inode, so,
after a sudden power cut, f2fs can recover from last checkpoint with full
directory structure.

But during checkpoint, we didn't flush dirty pages of regular and symlink
inode, so such dirty datas still in memory will be lost in that moment of
power off.

In order to reduce the chance of lost data, this patch enables
f2fs_balance_fs_bg with the ability of data flushing. It will try to flush
user data before starting a checkpoint. So user's data written after last
checkpoint which may not be fsynced could be saved.

When we mount with data_flush option, after every period of cp_interval
(could be configured in sysfs: /sys/fs/f2fs/device/cp_interval) seconds
user data could be flushed into device once f2fs_balance_fs_bg was called
in kworker thread or gc thread.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-17 09:53:26 -08:00
Chao Yu
33fbd5100d f2fs: stat dirty regular/symlink inodes
Add to stat dirty regular and symlink inode for showing in debugfs.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-17 09:53:19 -08:00
Chao Yu
343f40f0a7 f2fs: introduce new option for controlling data flush
Add a new option 'data_flush' to enable data flush functionality.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-16 09:25:48 -08:00
Chao Yu
c227f91273 f2fs: record dirty status of regular/symlink inode
Maintain regular/symlink inode which has dirty pages in global dirty list
and record their total dirty pages count like the way of handling directory
inode.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-16 08:58:12 -08:00
Chao Yu
b3980910f7 f2fs: introduce __f2fs_commit_super
Introduce __f2fs_commit_super to include duplicated codes in
f2fs_commit_super for cleanup.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-16 08:58:07 -08:00
Jaegeuk Kim
55d1cdb25a f2fs: relocate tracepoint of write_checkpoint
It needs to relocate its location to see exact trace logs.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-16 08:58:06 -08:00
Chao Yu
e8240f656d f2fs: don't grab super block buffer header all the time
We have already got one copy of valid super block in memory, do not grab
buffer header of super block all the time.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-16 08:58:06 -08:00
Yunlei He
b39f0de23d f2fs: backup raw_super in sbi
f2fs use fields of f2fs_super_block struct directly in a grabbed buffer.

Once the buffer happen to be destroyed (e.g. through dd), it may bring
in unpredictable effect on f2fs.

This patch fixes to allocate additional buffer to store datas of super
block rather than using grabbed block buffer directly.

Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-16 08:58:05 -08:00
Fan Li
a1c1e9b74f f2fs: fix to reset variable correctlly
f2fs_map_blocks will set m_flags and m_len to 0, so we don't need to
reset m_flags ourselves, but have to reset m_len to correct value
before use it again.

Signed-off-by: Fan li <fanofcode.li@samsung.com>
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-16 08:58:04 -08:00
Chao Yu
6ad7609a18 f2fs: introduce __remove_dirty_inode
Introduce __remove_dirty_inode to clean up codes in remove_dirty_dir_inode.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-15 13:31:28 -08:00
Chao Yu
2710fd7e00 f2fs: introduce dirty list node in inode info
Add a new dirt list node member in inode info for linking the inode to
global dirty list in superblock, instead of old implementation which
allocate slab cache memory as an entry to inode.

It avoids memory pressure due to slab cache allocation, and also makes
codes more clean.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-15 13:24:19 -08:00
Chao Yu
a49324f127 f2fs: rename {add,remove,release}_dirty_inode to {add,remove,release}_ino_entry
remove_dirty_dir_inode will be renamed to remove_dirty_inode as a generic
function in following patch for removing directory/regular/symlink inode
in global dirty list.

Here rename ino management related functions for readability, also in
order to avoid name conflict.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-15 13:23:43 -08:00
Jaegeuk Kim
a11fac3776 f2fs: add symbol to avoid any confusion with tools
This patch adds MAX_VOLUME_NAME to sync with f2fs-tools.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-14 18:58:42 -08:00
Chao Yu
9a59b62fd8 f2fs: do more integrity verification for superblock
Do more sanity check for superblock during ->mount.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-14 18:58:13 -08:00
Fan Li
e8931582bd f2fs: fix to update variable correctly when skip a unmapped block
map.m_len should be reduced after skip a block

Signed-off-by: Fan li <fanofcode.li@samsung.com>
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-14 10:17:54 -08:00
Fan Li
d8fe4f0e74 f2fs: write only the pages in range during defragment
@lend of filemap_write_and_wait_range is supposed to be a "offset
in bytes where the range ends (inclusive)". Subtract 1 to avoid
writing an extra page.

Signed-off-by: Fan li <fanofcode.li@samsung.com>
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-14 10:17:54 -08:00
Chao Yu
e1c51b9f1d f2fs: clean up node page updating flow
If read_node_page return LOCKED_PAGE, in its caller it's better a) skip
unneeded 'Update' flag and mapping info verfication; b) check nid value
stored in footer structure of node page.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-14 09:09:17 -08:00
Jaegeuk Kim
ea212a4a7a f2fs: use lock_buffer when changing superblock
When modifying sb contents, we need to use lock its buffer.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-09 09:53:18 -08:00
Jaegeuk Kim
5d909cdbbb f2fs: refactor f2fs_commit_super
Previously, f2fs_commit_super hacks the bh->blocknr to write the broken
alternate superblock.
Instead of it, we should use the correct logic to retrieve its buffer head
with locking it appropriately.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-09 09:51:07 -08:00
Jaegeuk Kim
80609448cd f2fs: enhance the bit operation for SSR
This patch enhances the existing bit operation when f2fs allocates SSR
blocks.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-09 09:50:32 -08:00
Chao Yu
0cab80ee0c f2fs: fix to convert inline inode in ->setattr
In commit 3c45414527 ("f2fs: do not trim preallocated blocks when
truncating after i_size"), in order to follow the regulation: "truncate(x)
where x > i_size will not trim all blocks past i_size." like other file
systems, in ->setattr we invoked truncate_setsize instead of f2fs_truncate
to avoid unneeded block trimming in such case, but forgot to call
f2fs_convert_inline_inode keep consistency of inline data conversion rule.

This patch fixes to convert inline data if necessary.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04 13:14:44 -08:00
Chao Yu
3519e3f992 f2fs: use sbi->blocks_per_seg to avoid unnecessary calculation
Use sbi->blocks_per_seg directly to avoid unnecessary calculation when using
1 << sbi->log_blocks_per_seg.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04 12:07:57 -08:00
Chao Yu
9006f2c93f f2fs: kill f2fs_drop_largest_extent
For direct IO, f2fs only allocate new address for the block which is not
exist in the disk before, its mapping info should not exist in extent
cache previously, so here we do not need to call f2fs_drop_largest_extent
to drop related cache.

Due to no more callers for f2fs_drop_largest_extent now, kill it.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04 12:07:57 -08:00
Chao Yu
b7973f2378 f2fs: clean up argument of recover_data
In recover_data, value of argument 'type' will be CURSEG_WARM_NODE all
the time, remove it for cleanup.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04 12:07:56 -08:00
Chao Yu
855639deca f2fs: clean up code with __has_cursum_space
Clean up codes in lookup_journal_in_cursum() with __has_cursum_space().

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04 12:07:55 -08:00
Chao Yu
e9837bc2a4 f2fs: clean up error path in f2fs_readdir
No logic changes, just clean up the error path.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04 12:07:55 -08:00
Jaegeuk Kim
807b1e1c8e f2fs: do not recover from previous remained wrong dnodes
If device does not support discard, some obsolete dnodes can be recovered
by roll-forward. This patch enhances the recovery flow.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04 11:52:36 -08:00
Jaegeuk Kim
760de7914e f2fs: avoid deadlock in f2fs_shrink_extent_tree
While handling extent trees, we can enter into a reclaiming path anytime.
If it tries to release some extent nodes in the same extent tree,
write_lock(&et->lock) would be hanged.
In order to avoid the deadlock, we can just skip it.

Note that, if it is an unreferenced tree, we should get write_lock(&et->lock)
successfully and release all of therein nodes.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04 11:52:36 -08:00
Chao Yu
57b62d29ad f2fs: fix to report error in f2fs_readdir
get_lock_data_page in f2fs_readdir can fail due to a lot of reasons (i.e.
no memory or IO error...), it's better to report this kind of error to
user rather than ignoring it.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04 11:52:35 -08:00
Chao Yu
f478f43fa0 f2fs: clear page uptodate when dropping cache for atomic write
We should clear uptodate flag for all pages atomic written when we drop
them, otherwise before these cached pages were reclaimed or invalidated
eventually, we will see invalid data when hitting them again.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04 11:52:35 -08:00
Fan Li
692223d132 f2fs: optimize __find_rev_next_bit
1. Skip __reverse_ulong if the bitmap is empty.
2. Reduce branches and codes.
According to my test, the performance of this new version is 5% higher on
an empty bitmap of 64bytes, and remains about the same in the worst scenario.

Signed-off-by: Fan li <fanofcode.li@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04 11:52:35 -08:00
Chao Yu
eb7e813cc7 f2fs: fix to remove directory inode from dirty list
If last dirty dentry page was writebacked in reclaim path, we should
remove its directory inode from global dirty list to avoid unnecessary
flush for this inode when doing checkpoint.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04 11:52:34 -08:00
Chao Yu
04ef4b626c f2fs: fix to enable missing ioctl interfaces in ->compat_ioctl
In 64-bit kernel f2fs can supports 32-bit ioctl system call by identifying
encoded code which is converted from 32-bit one to 64-bit one in
->compat_ioctl.

When we introduced new interfaces in ->ioctl, we forgot to enable them in
->compat_ioctl, so enable them for fixing.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
[Jaegeuk Kim: fix wrongly added spaces together]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04 11:52:34 -08:00
Chao Yu
29ba108d9b f2fs: fix memory leak of kobject in error path of fill_super
f2fs_sb_info::s_kobj should be released in error path of fill_super,
otherwise it will lead to memory leak.

This bug was found by kmemleak:

dmesg:
kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak)

cat /sys/kernel/debug/kmemleak
unreferenced object 0xffff8800838dc358 (size 8):
  comm "mount", pid 4154, jiffies 4297482839 (age 1911.412s)
  hex dump (first 8 bytes):
    7a 72 61 6d 31 00 ff ff                          zram1...
  backtrace:
    [<ffffffff817a3668>] kmemleak_alloc+0x28/0x50
    [<ffffffff811dc99f>] __kmalloc_track_caller+0xef/0x1c0
    [<ffffffff8119d1c5>] kstrdup+0x45/0x80
    [<ffffffff8119d228>] kstrdup_const+0x28/0x30
    [<ffffffff813d2333>] kvasprintf_const+0x63/0xa0
    [<ffffffff813c59fc>] kobject_set_name_vargs+0x3c/0xa0
    [<ffffffff813c5a85>] kobject_add_varg+0x25/0x60
    [<ffffffff813c5b13>] kobject_init_and_add+0x53/0x70
    [<ffffffffa07ced19>] f2fs_fill_super+0x9d9/0xc40 [f2fs]
    [<ffffffff811ff0b2>] mount_bdev+0x192/0x1d0
    [<ffffffffa07cd3e5>] f2fs_mount+0x15/0x20 [f2fs]
    [<ffffffff811fec93>] mount_fs+0x43/0x170
    [<ffffffff81220256>] vfs_kern_mount+0x76/0x160
    [<ffffffff812211c8>] do_mount+0x258/0xdc0
    [<ffffffff81221dab>] SyS_mount+0x7b/0xc0
    [<ffffffff817aecd7>] entry_SYSCALL_64_fastpath+0x12/0x6f
...

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04 11:52:34 -08:00
Masanari Iida
4bb9998d38 Doc: f2fs: Fix typos in Documentation/filesystems/f2fs.txt
This patch fix some typos in Documentation/filesystems/f2fs.txt

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04 11:52:33 -08:00
Chao Yu
d323d005ac f2fs: support file defragment
This patch introduces a new ioctl F2FS_IOC_DEFRAGMENT to support file
defragment in a specified range of regular file.

This ioctl can be used in very limited workload: if user expects high
sequential read performance in randomly written file, this interface
can be used for defragmentation, after that file can be written as
continuous as possible in the device.

Meanwhile, it has side-effect, it will make holes in segments where
blocks located originally, so it's better to trigger GC to eliminate
fragment in segments.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04 11:52:33 -08:00
Chao Yu
2da3e02746 f2fs: commit atomic written page in LFS mode
We should always commit atomic written pages in LFS mode, otherwise data
will become corrupted if we encounter suddent power cut after partial
pages committed in IPU mode.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04 11:52:33 -08:00
Chao Yu
787c7b8cb3 f2fs: report error of f2fs_create_root_stats
f2fs_create_root_stats can fail due to no memory, report it to user.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04 11:52:33 -08:00
Linus Torvalds
fb39cbda14 Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm fixes from Dan Williams:

 - NFIT parsing regression fixes from Linda.  The nvdimm hot-add
   implementation merged in 4.4-rc1 interpreted the specification in a
   way that breaks actual HPE platforms.  We are also closing the loop
   with the ACPI Working Group to get this clarification added to the
   spec.

 - Andy pointed out that his laptop without nvdimm resources is loading
   the e820-nvdimm module by default, fix that up to only load the
   module when an e820-type-12 range is present.

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  nfit: Adjust for different _FIT and NFIT headers
  nfit: Fix the check for a successful NFIT merge
  nfit: Account for table size length variation
  libnvdimm, e820: skip module loading when no type-12
2015-12-04 11:30:45 -08:00
Linus Torvalds
db281766ba KVM/ARM fixes for v4.4-rc4
- A series of fixes to deal with the aliasing between the sp and xzr register
 - A fix for the cache flush fix that went in -rc3
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull ARM KVM fixes from Paolo Bonzini:

 - a series of fixes to deal with the aliasing between the sp and xzr
   register

 - a fix for the cache flush fix that went in -rc3

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  ARM/arm64: KVM: correct PTE uncachedness check
  arm64: KVM: Get rid of old vcpu_reg()
  arm64: KVM: Correctly handle zero register in system register accesses
  arm64: KVM: Remove const from struct sys_reg_params
  arm64: KVM: Correctly handle zero register during MMIO
2015-12-04 10:17:20 -08:00