Now, FALLOC_FL_COLLAPSE_RANGE flag in ->fallocate is supported in ext4/xfs.
In commit, the semantics of this flag is descripted as following:"
1) It collapses the range lying between offset and length by removing any
data blocks which are present in this range and than updates all the
logical offsets of extents beyond "offset + len" to nullify the hole
created by removing blocks. In short, it does not leave a hole.
2) It should be used exclusively. No other fallocate flag in combination.
3) Offset and length supplied to fallocate should be fs block size aligned
in case of xfs and ext4.
4) Collaspe range does not work beyond i_size."
This patch implements fallocate's FALLOC_FL_COLLAPSE_RANGE for f2fs.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Introduce a generic function replace_block base on recover_data_page,
and export it. So with it we can operate file's meta data which is in
CP/SSA area when we invoke fallocate with FALLOC_FL_COLLAPSE_RANGE
flag.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
In set_node_addr, we try to lookup cached nat entry of inode and then
set flag in it.
But previously in this function, we have already grabbed nat entry with
current node id, if the node id is the same as the one of inode, we
do not need to lookup it in cache again.
So this patch adds condition judgment for reducing unneeded lookup.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Remove f2fs_make_empty() declaration, since the main body of this function
is move into do_make_empty_dir() and the function is obsolete now.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This patch determines to issue discard commands by comparing given minlen and
the length of produced final candidates.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This patch adds a bitmap for discard issues from f2fs_trim_fs.
There-in rule is to issue discard commands only for invalidated blocks
after mount.
Once mount is done, f2fs_trim_fs trims out whole invalid area.
After ehn, it will not issue and discrads redundantly.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This patch removes spin_lock, since this is covered by f2fs_lock_op already.
And, we should avoid to use page operations inside spin_lock.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This patch splits find_data_page as follows.
1. f2fs_gc
- use get_read_data_page() with read only
2. find_in_level
- use find_data_page without locked page
3. truncate_partial_page
- In the case cache_only mode, just drop cached page.
- Ohterwise, use get_lock_data_page() and guarantee to truncate
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
There are two threads:
f2fs_delete_entry() get_new_data_page()
f2fs_reserve_block()
dn.blkaddr = XXX
lock_page(dentry_block)
truncate_hole()
dn.blkaddr = NULL
unlock_page(dentry_block)
lock_page(dentry_block)
fill the block from XXX address
add new dentries
unlock_page(dentry_block)
Later, f2fs_write_data_page() will truncate the dentry_block, since
its block address is NULL.
The reason for this was due to the wrong lock order.
In this case, we should do f2fs_reserve_block() after locking its dentry block.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This patch adds f2fs_sb_info and page pointers in f2fs_io_info structure.
With this change, we can reduce a lot of parameters for IO functions.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This patch implements f2fs_mpage_readpages for further optimization on
encryption support.
The basic code was taken from fs/mpage.c, and changed to be simple by adjusting
that block_size is equal to page_size in f2fs.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
a) instead of storing the symlink body (via nd_set_link()) and returning
an opaque pointer later passed to ->put_link(), ->follow_link() _stores_
that opaque pointer (into void * passed by address by caller) and returns
the symlink body. Returning ERR_PTR() on error, NULL on jump (procfs magic
symlinks) and pointer to symlink body for normal symlinks. Stored pointer
is ignored in all cases except the last one.
Storing NULL for opaque pointer (or not storing it at all) means no call
of ->put_link().
b) the body used to be passed to ->put_link() implicitly (via nameidata).
Now only the opaque pointer is. In the cases when we used the symlink body
to free stuff, ->follow_link() now should store it as opaque pointer in addition
to returning it.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
has_fsynced_inode() has no other caller out of node.c, make it static.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
In the punch_hole(), if offset bigger than inode size, it returns SUCCESS.
Then f2fs_fallocate() will update time and dirty mark.
In that case, inode has not been modified actually.
So I have added offset check routine that prevent to call the punch_hole().
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Export is_valid_blkaddr() and use it to replace some codes for readability.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Our f2fs_acl_create is copied from posix_acl_create in ./fs/posix_acl.c and
modified to avoid deadlock bug when inline_dentry feature is enabled.
Dan Carpenter rewrites posix_acl_create in commit 2799563b281f
("fs/posix_acl.c: make posix_acl_create() safer and cleaner") to make this
function more safer, so that we can avoid potential bug in its caller,
especially for ocfs2.
Let's back port the patch to f2fs.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
The page_follow_link_light returns NULL and its error pointer was remained
in nd->path.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This reports performance regression by Yuanhan Liu.
The basic idea was to reduce one-point mutex, but it turns out this causes
another contention like context swithes.
https://lkml.org/lkml/2015/4/21/11
Until finishing the analysis on this issue, I'd like to revert this for a while.
This reverts commit 78373b7319abdf15050af5b1632c4c8b8b398f33.
Pull fourth vfs update from Al Viro:
"d_inode() annotations from David Howells (sat in for-next since before
the beginning of merge window) + four assorted fixes"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
RCU pathwalk breakage when running into a symlink overmounting something
fix I_DIO_WAKEUP definition
direct-io: only inc/dec inode->i_dio_count for file systems
fs/9p: fix readdir()
VFS: assorted d_backing_inode() annotations
VFS: fs/inode.c helpers: d_inode() annotations
VFS: fs/cachefiles: d_backing_inode() annotations
VFS: fs library helpers: d_inode() annotations
VFS: assorted weird filesystems: d_inode() annotations
VFS: normal filesystems (and lustre): d_inode() annotations
VFS: security/: d_inode() annotations
VFS: security/: d_backing_inode() annotations
VFS: net/: d_inode() annotations
VFS: net/unix: d_backing_inode() annotations
VFS: kernel/: d_inode() annotations
VFS: audit: d_backing_inode() annotations
VFS: Fix up some ->d_inode accesses in the chelsio driver
VFS: Cachefiles should perform fs modifications on the top layer only
VFS: AF_UNIX sockets should call mknod on the top layer only
Pull f2fs updates from Jaegeuk Kim:
"New features:
- in-memory extent_cache
- fs_shutdown to test power-off-recovery
- use inline_data to store symlink path
- show f2fs as a non-misc filesystem
Major fixes:
- avoid CPU stalls on sync_dirty_dir_inodes
- fix some power-off-recovery procedure
- fix handling of broken symlink correctly
- fix missing dot and dotdot made by sudden power cuts
- handle wrong data index during roll-forward recovery
- preallocate data blocks for direct_io
... and a bunch of minor bug fixes and cleanups"
* tag 'for-f2fs-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (71 commits)
f2fs: pass checkpoint reason on roll-forward recovery
f2fs: avoid abnormal behavior on broken symlink
f2fs: flush symlink path to avoid broken symlink after POR
f2fs: change 0 to false for bool type
f2fs: do not recover wrong data index
f2fs: do not increase link count during recovery
f2fs: assign parent's i_mode for empty dir
f2fs: add F2FS_INLINE_DOTS to recover missing dot dentries
f2fs: fix mismatching lock and unlock pages for roll-forward recovery
f2fs: fix sparse warnings
f2fs: limit b_size of mapped bh in f2fs_map_bh
f2fs: persist system.advise into on-disk inode
f2fs: avoid NULL pointer dereference in f2fs_xattr_advise_get
f2fs: preallocate fallocated blocks for direct IO
f2fs: enable inline data by default
f2fs: preserve extent info for extent cache
f2fs: initialize extent tree with on-disk extent info of inode
f2fs: introduce __{find,grab}_extent_tree
f2fs: split set_data_blkaddr from f2fs_update_extent_cache
f2fs: enable fast symlink by utilizing inline data
...
This patch adds CP_RECOVERY to remain recovery information for checkpoint.
And, it makes sure writing checkpoint in this case.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
When f2fs_symlink was triggered and checkpoint was done before syncing its
link path, f2fs can get broken symlink like "xxx -> \0\0\0".
This incurs abnormal path_walk by VFS.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This patch tries to avoid broken symlink case after POR in best effort.
This results in performance regression.
But, if f2fs has inline_data and the target path is under 3KB-sized long,
the page would be stored in its inode_block, so that there would be no
performance regression.
Note that, if user wants to keep this file atomically, it needs to trigger
dir->fsync.
And, there is still a hole to produce broken symlink.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
in the f2fs_fill_super function, variable "retry" is bool type
i think that it should be set as false.
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
that's the bulk of filesystem drivers dealing with inodes of their own
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
The rw parameter to direct_IO is redundant with iov_iter->type, and
treated slightly differently just about everywhere it's used: some users
do rw & WRITE, and others do rw == WRITE where they should be doing a
bitwise check. Simplify this with the new iov_iter_rw() helper, which
always returns either READ or WRITE.
Signed-off-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Most filesystems call through to these at some point, so we'll start
here.
Signed-off-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
All places outside of core VFS that checked ->read and ->write for being NULL or
called the methods directly are gone now, so NULL {read,write} with non-NULL
{read,write}_iter will do the right thing in all cases.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
During the roll-forward recovery, if we found a new data index written fsync
lastly, we need to recover new block address.
But, if that address was corrupted, we should not recover that.
Otherwise, f2fs gets kernel panic from:
In check_index_in_prev_nodes(),
sentry = get_seg_entry(sbi, segno);
--------------------------> out-of-range segno.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
If there are multiple fsynced dnodes having a dent flag, roll-forward routine
sets FI_INC_LINK for their inode, and recovery_dentry increases its link count
accordingly.
That results in normal file having a link count as 2, so we can't unlink those
files.
This was added to handle several inode blocks having same inode number with
different directory paths.
But, current f2fs doesn't replay all of path changes and only recover its dentry
for the last fsynced inode block.
So, there is no reason to do this.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
If f2fs was corrupted with missing dot dentries, it needs to recover them after
fsck.f2fs detection.
The underlying precedure is:
1. The fsck.f2fs remains F2FS_INLINE_DOTS flag in directory inode, if it detects
missing dot dentries.
2. When f2fs looks up the corrupted directory, it triggers f2fs_add_link with
proper inode numbers and their dot and dotdot names.
3. Once f2fs recovers the directory without errors, it removes F2FS_INLINE_DOTS
finally.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This patch fixes the below warning.
sparse warnings: (new ones prefixed by >>)
>> fs/f2fs/inode.c:56:23: sparse: restricted __le32 degrades to integer
>> fs/f2fs/inode.c:56:52: sparse: restricted __le32 degrades to integer
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Map bh over max size which caller defined is not needed, limit it in
f2fs_map_bh.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This patch fixes to dirty inode for persisting i_advise of f2fs inode info into
on-disk inode if user sets system.advise through setxattr. Otherwise the new
value will be lost.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
