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When non-dir index union nlink drops to zero the non-dir index
is cleaned. Do the same for directory type index entries when
union directory is removed.
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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With the NFS export feature enabled, all dirs are indexed on copy up.
Non-dir files are copied up directly to indexdir and then hardlinked
to upper dir.
Directories are copied up to indexdir, then an index entry is created
in indexdir with 'upper' xattr pointing to the copied up dir and then
the copied up dir is moved to upper dir.
Directory index is also used for consistency verification, like
detecting multiple redirected dirs to the same lower dir on lookup.
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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With the NFS export feature enabled, all non-dir are indexed on copy up.
The copy up origin inode of an indexed non-dir can be used as a unique
identifier of the overlay object.
The full index is also used for consistency verfication, like detecting
multiple non-hardlink uppers with the same 'origin' on lookup.
Directory index on copy up will be implemented by following patch.
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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The helper determines which lower file needs to be indexed
on copy up and before nlink changes.
For index=on, the helper evaluates to true for lower hardlinks.
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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A previous failed attempt to create or whiteout a directory index may
leave index entries named '#%x' in the index dir. Cleanup those temp
entries on mount instead of failing the mount.
In the future, we may drop 'work' dir and use 'index' dir instead.
This change is enough for cleaning up copy up leftovers 'from the future',
but it is not enough for cleaning up rmdir leftovers 'from the future'
(i.e. temp dir containing whiteouts).
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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Directory index entries should have 'upper' xattr pointing to the real
upper dir. Verifying that the upper dir file handle is not stale is
expensive, so only verify stale directory index entries on mount if
NFS export feature is enabled.
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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Whiteout index entries are used as an indication that an exported
overlay file handle should be treated as stale (i.e. after unlink
of the overlay inode).
Check on mount that whiteout index entries have a name that looks like
a valid file handle and cleanup invalid index entries.
For whiteout index entries, do not check that they also have valid
origin fh and nlink xattr, because those xattr do not exist for a
whiteout index entry.
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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A directory index is a directory type entry in index dir with a
"trusted.overlay.upper" xattr containing an encoded ovl_fh of the merge
directory upper dir inode.
On lookup of non-dir files, lower file is followed by origin file handle.
On lookup of dir entries, lower dir is found by name and then compared
to origin file handle. We only trust dir index if we verified that lower
dir matches origin file handle, otherwise index may be inconsistent and
we ignore it.
If we find an indexed non-upper dir or an indexed merged dir, whose
index 'upper' xattr points to a different upper dir, that means that the
lower directory may be also referenced by another upper dir via redirect,
so we fail the lookup on inconsistency error.
To be consistent with directory index entries format, the association of
index dir to upper root dir, that was stored by older kernels in
"trusted.overlay.origin" xattr is now stored in "trusted.overlay.upper"
xattr. This also serves as an indication that overlay was mounted with a
kernel that support index directory entries. For backward compatibility,
if an 'origin' xattr exists on the index dir we also verify it on mount.
Directory index entries are going to be used for NFS export.
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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On a malformed overlay, several redirected dirs can point to the same
dir on a lower layer. This presents a similar challenge as broken
hardlinks, because different objects in the overlay can return the same
st_ino/st_dev pair from stat(2).
For broken hardlinks, we do not provide constant st_ino on copy up to
avoid this inconsistency. When NFS export feature is enabled, apply
the same logic to files and directories with unverified lower origin.
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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When the NFS export feature is enabled, overlayfs implicitly enables the
feature "verify_lower". When the "verify_lower" feature is enabled, a
directory inode found in lower layer by name or by redirect_dir is
verified against the file handle of the copy up origin that is stored in
the upper layer.
This introduces a change of behavior for the case of lower layer
modification while overlay is offline. A lower directory created or
moved offline under an exisitng upper directory, will not be merged with
that upper directory.
The NFS export feature should not be used after copying layers, because
the new lower directory inodes would fail verification and won't be
merged with upper directories.
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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Introduce the "nfs_export" config, module and mount options.
The NFS export feature depends on the "index" feature and enables two
implicit overlayfs features: "index_all" and "verify_lower".
The "index_all" feature creates an index on copy up of every file and
directory. The "verify_lower" feature uses the full index to detect
overlay filesystems inconsistencies on lookup, like redirect from
multiple upper dirs to the same lower dir.
NFS export can be enabled for non-upper mount with no index. However,
because lower layer redirects cannot be verified with the index, enabling
NFS export support on an overlay with no upper layer requires turning off
redirect follow (e.g. "redirect_dir=nofollow").
The full index may incur some overhead on mount time, especially when
verifying that lower directory file handles are not stale.
NFS export support, full index and consistency verification will be
implemented by following patches.
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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Document that inode index feature solves breaking hard links on
copy up.
Simplify Kconfig backward compatibility disclaimer.
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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Remove the "origin" language from the functions that handle set, get
and verify of "origin" xattr and pass the xattr name as an argument.
The same helpers are going to be used for NFS export to get, get and
verify the "upper" xattr for directory index entries.
ovl_verify_origin() is now a helper used only to verify non upper
file handle stored in "origin" xattr of upper inode.
The upper root dir file handle is still stored in "origin" xattr on
the index dir for backward compatibility. This is going to be changed
by the patch that adds directory index entries support.
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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Pass the fs instance with lower_layers array instead of the dentry
lowerstack array to ovl_check_origin_fh(), because the dentry members
of lowerstack play no role in this helper.
This change simplifies the argument list of ovl_check_origin(),
ovl_cleanup_index() and ovl_verify_index().
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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Re-factor ovl_check_origin() and ovl_get_origin(), so origin fh xattr is
read from upper inode only once during lookup with multiple lower layers
and only once when verifying index entry origin.
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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Store the fs root layer index inside ovl_layer struct, so we can
get the root fs layer index from merge dir lower layer instead of
find it with ovl_find_layer() helper.
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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When work dir creation fails, a warning is emitted and overlay is
mounted r/o. Trying to remount r/w will fail with no work dir.
When index dir creation fails, the same warning is emitted and overlay
is mounted r/o, but trying to remount r/w will succeed. This may cause
unintentional corruption of filesystem consistency.
Adjust the behavior of index dir creation failure to that of work dir
creation failure and do not allow to remount r/w. User needs to state
an explicitly intention to work without an index by mounting with
option 'index=off' to allow r/w mount with no index dir.
When mounting with option 'index=on' and no 'upperdir', index is
implicitly disabled, so do not warn about no file handle support.
The issue was introduced with inodes index feature in v4.13, but this
patch will not apply cleanly before ovl_fill_super() re-factoring in
v4.15.
Fixes: 02bcd1577400 ("ovl: introduce the inodes index dir feature")
Cc: <[email protected]> #v4.13
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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Overlayfs falls back to index=off if lower/upper fs does not support
file handles. Do the same if upper fs does not support xattr.
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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For a merge dir that was copied up before v4.12 or that was hand crafted
offline (e.g. mkdir {upper/lower}/dir), upper dir does not contain the
'trusted.overlay.origin' xattr. In that case, stat(2) on the merge dir
returns the lower dir st_ino, but getdents(2) returns the upper dir d_ino.
After this change, on merge dir lookup, missing origin xattr on upper
dir will be fixed and 'impure' xattr will be fixed on parent of the legacy
merge dir.
Suggested-by: zhangyi (F) <[email protected]>
Reviewed-by: zhangyi (F) <[email protected]>
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
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en_rx_am.c was deleted in 'net-next' but had a bug fixed in it in
'net'.
The esp{4,6}_offload.c conflicts were overlapping changes.
The 'out' label is removed so we just return ERR_PTR(-EINVAL)
directly.
Signed-off-by: David S. Miller <[email protected]>
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This patch just adds the capability for GFS2 to track which function
called gfs2_log_flush. This should make it easier to diagnose
problems based on the sequence of events found in the journals.
Signed-off-by: Bob Peterson <[email protected]>
Reviewed-by: Andreas Gruenbacher <[email protected]>
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This patch adds a new structure called gfs2_log_header_v2 which is used
to store expanded fields into previously unused areas of the log headers
(i.e., this change is backwards compatible). Some of these are used for
debug purposes so we can backtrack when problems occur. Others are
reserved for future expansion.
This patch is based on a prototype from Steve Whitehouse.
Signed-off-by: Bob Peterson <[email protected]>
Signed-off-by: Andreas Gruenbacher <[email protected]>
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It isn't needed at all in these files, dynamic debug is the best way to
enable this type of thing, if you really want it. As it is, these
defines were not doing anything at all.
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Move the license "mark" of the sysfs files to be in SPDX form, instead
of the custom text that it currently is in. This is in a quest to get
rid of the 700+ different ways we say "GPLv2" in the kernel tree.
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Commit bdcf0a423ea1 ("kernel: make groups_sort calling a responsibility
group_info allocators") appears to break nfsd rootsquash in a pretty
major way.
It adds a call to groups_sort() inside the loop that copies/squashes
gids, which means the valid gids are sorted along with the following
garbage. The net result is that the highest numbered valid gids are
replaced with any lower-valued garbage gids, possibly including 0.
We should sort only once, after filling in all the gids.
Fixes: bdcf0a423ea1 ("kernel: make groups_sort calling a responsibility ...")
Signed-off-by: Ben Hutchings <[email protected]>
Acked-by: J. Bruce Fields <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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If fsck.f2fs changes crc, we have no way to recover some inode blocks by roll-
forward recovery. Let's relax the condition to recover them.
Reviewed-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
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This fixes lost i_inline flags during roll-forward.
Reviewed-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
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__vfs_removexattr() transfers "NULL" value to the setxattr handler of
the f2fs filesystem in order to remove the extended attribute. But,
__f2fs_setxattr() just ignores the removal request when the value of
the extended attribute is already NULL. We have to remove the extended
attribute itself even if the value of that is already NULL.
We can reporduce this bug with the below:
1. touch file
2. setfattr -n "user.foo" file
3. setfattr -x "user.foo" file
4. getfattr -d file
> user.foo
Signed-off-by: Daeho Jeong <[email protected]>
Signed-off-by: Youngjin Gil <[email protected]>
Tested-by: Hobin Woo <[email protected]>
Tested-by: Chao Yu <[email protected]>
Reviewed-by: Chao Yu <[email protected]>
Signed-off-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
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Don't remain dirtied page cache in f2fs after shutdown, it can mitigate
memory pressure of whole system, in order to keep other modules working
properly.
Signed-off-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
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Once filesystem shuts down, daemons like gc/discard thread should be
aware of it, and do exit, in addtion, drop all cached pending discard
commands and turn off real-time discard mode.
Signed-off-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
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This patch makes f2fs_ioc_shutdown handling error case correctly.
Signed-off-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
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This patch splits need_inplace_update to two functions:
a. should_update_inplace() includes all conditions that we must use IPU.
b. should_update_outplace() includes all conditions that we must use OPU.
So that, in f2fs_ioc_set_pin_file() and f2fs_defragment_range(), we can
use corresponding function to check whether we can trigger OPU/IPU or not.
Signed-off-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
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This patch fixes to update last_disk_size only when writing out page
successfully.
Signed-off-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
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Use get_inline_xattr_addrs directly instead of F2FS_INLINE_XATTR_ADDRS.
Signed-off-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
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This patch cleans up error path of fille_super to avoid unneeded
release step.
Signed-off-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
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When io_bits is set, GCing encrypted block may hit the following hungtask.
Since io_bits requires aligned block address, f2fs_submit_page_write may
return -EAGAIN if new_blkaddr does not satisify io_bits alignment. As a
result, the encrypted page will never be writtenback.
This patch makes move_data_block aware the EAGAIN error and cancel the
writeback.
[ 246.751371] INFO: task kworker/u4:4:797 blocked for more than 90 seconds.
[ 246.752423] Not tainted 4.15.0-rc4+ #11
[ 246.754176] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 246.755336] kworker/u4:4 D25448 797 2 0x80000000
[ 246.755597] Workqueue: writeback wb_workfn (flush-7:0)
[ 246.755616] Call Trace:
[ 246.755695] ? __schedule+0x322/0xa90
[ 246.755761] ? blk_init_request_from_bio+0x120/0x120
[ 246.755773] ? pci_mmcfg_check_reserved+0xb0/0xb0
[ 246.755801] ? __radix_tree_create+0x19e/0x200
[ 246.755813] ? delete_node+0x136/0x370
[ 246.755838] schedule+0x43/0xc0
[ 246.755904] io_schedule+0x17/0x40
[ 246.755939] wait_on_page_bit_common+0x17b/0x240
[ 246.755950] ? wake_page_function+0xa0/0xa0
[ 246.755961] ? add_to_page_cache_lru+0x160/0x160
[ 246.755972] ? page_cache_tree_insert+0x170/0x170
[ 246.755983] ? __lru_cache_add+0x96/0xb0
[ 246.756086] __filemap_fdatawait_range+0x14f/0x1c0
[ 246.756097] ? wait_on_page_bit_common+0x240/0x240
[ 246.756120] ? __wake_up_locked_key_bookmark+0x20/0x20
[ 246.756167] ? wait_on_all_pages_writeback+0xc9/0x100
[ 246.756179] ? __remove_ino_entry+0x120/0x120
[ 246.756192] ? wait_woken+0x100/0x100
[ 246.756204] filemap_fdatawait_range+0x9/0x20
[ 246.756216] write_checkpoint+0x18a1/0x1f00
[ 246.756254] ? blk_get_request+0x10/0x10
[ 246.756265] ? cpumask_next_and+0x43/0x60
[ 246.756279] ? f2fs_sync_inode_meta+0x160/0x160
[ 246.756289] ? remove_element.isra.4+0xa0/0xa0
[ 246.756300] ? __put_compound_page+0x40/0x40
[ 246.756310] ? f2fs_sync_fs+0xec/0x1c0
[ 246.756320] ? f2fs_sync_fs+0x120/0x1c0
[ 246.756329] f2fs_sync_fs+0x120/0x1c0
[ 246.756357] ? trace_event_raw_event_f2fs__page+0x260/0x260
[ 246.756393] ? ata_build_rw_tf+0x173/0x410
[ 246.756397] f2fs_balance_fs_bg+0x198/0x390
[ 246.756405] ? drop_inmem_page+0x230/0x230
[ 246.756415] ? ahci_qc_prep+0x1bb/0x2e0
[ 246.756418] ? ahci_qc_issue+0x1df/0x290
[ 246.756422] ? __accumulate_pelt_segments+0x42/0xd0
[ 246.756426] ? f2fs_write_node_pages+0xd1/0x380
[ 246.756429] f2fs_write_node_pages+0xd1/0x380
[ 246.756437] ? sync_node_pages+0x8f0/0x8f0
[ 246.756440] ? update_curr+0x53/0x220
[ 246.756444] ? __accumulate_pelt_segments+0xa2/0xd0
[ 246.756448] ? __update_load_avg_se.isra.39+0x349/0x360
[ 246.756452] ? do_writepages+0x2a/0xa0
[ 246.756456] do_writepages+0x2a/0xa0
[ 246.756460] __writeback_single_inode+0x70/0x490
[ 246.756463] ? check_preempt_wakeup+0x199/0x310
[ 246.756467] writeback_sb_inodes+0x2a2/0x660
[ 246.756471] ? is_empty_dir_inode+0x40/0x40
[ 246.756474] ? __writeback_single_inode+0x490/0x490
[ 246.756477] ? string+0xbf/0xf0
[ 246.756480] ? down_read_trylock+0x35/0x60
[ 246.756484] __writeback_inodes_wb+0x9f/0xf0
[ 246.756488] wb_writeback+0x41d/0x4b0
[ 246.756492] ? writeback_inodes_wb.constprop.55+0x150/0x150
[ 246.756498] ? set_worker_desc+0xf7/0x130
[ 246.756502] ? current_is_workqueue_rescuer+0x60/0x60
[ 246.756511] ? _find_next_bit+0x2c/0xa0
[ 246.756514] ? wb_workfn+0x400/0x5d0
[ 246.756518] wb_workfn+0x400/0x5d0
[ 246.756521] ? finish_task_switch+0xdf/0x2a0
[ 246.756525] ? inode_wait_for_writeback+0x30/0x30
[ 246.756529] process_one_work+0x3a7/0x6f0
[ 246.756533] worker_thread+0x82/0x750
[ 246.756537] kthread+0x16f/0x1c0
[ 246.756541] ? trace_event_raw_event_workqueue_work+0x110/0x110
[ 246.756544] ? kthread_create_worker_on_cpu+0xb0/0xb0
[ 246.756548] ret_from_fork+0x1f/0x30
Signed-off-by: Sheng Yong <[email protected]>
Reviewed-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
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This patch allows quota to use reserved blocks all the time.
Reviewed-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
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In commit 57864ae5ce3a ("f2fs: limit # of inmemory pages"), we have
limited memory footprint of all inmem pages with 20% of total memory,
otherwise, if we exceed the threshold, we will try to drop all inmem
pages to avoid excessive memory pressure resulting in performance
regression.
But in some unrelated error paths, we will also drop all inmem pages,
which should be wrong, fix it in this patch.
Signed-off-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
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We have supported to get next page offset with valid mapping crossing
hole in f2fs_map_blocks, utilizing it to speed up defragment on sparse
file.
Signed-off-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
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This patch introduces a new ioctl F2FS_IOC_PRECACHE_EXTENTS to precache
extent info like ext4, in order to gain better performance during
triggering AIO by eliminating synchronous waiting of mapping info.
Referred commit: 7869a4a6c5ca ("ext4: add support for extent pre-caching")
In addition, with newly added extent precache abilitiy, this patch add
to support FIEMAP_FLAG_CACHE in ->fiemap.
Signed-off-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
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This patch gives a flag to disable GC on given file, which would be useful, when
user wants to keep its block map. It also conducts in-place-update for dontmove
file.
Reviewed-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
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In orangefs_devreq_read, there is a loop which picks an op off the list
of pending ops. If the loop fails to find an op, there is nothing to
read, and it returns EAGAIN. If the op has been given up on, the loop
is restarted via a goto. The bug is that the variable which the found
op is written to is not reinitialized, so if there are no more eligible
ops on the list, the code runs again on the already handled op.
This is triggered by interrupting a process while the op is being copied
to the client-core. It's a fairly small window, but it's there.
Signed-off-by: Martin Brandenburg <[email protected]>
Cc: [email protected]
Signed-off-by: Linus Torvalds <[email protected]>
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set_op_state_purged can delete the op.
Signed-off-by: Martin Brandenburg <[email protected]>
Cc: [email protected]
Signed-off-by: Linus Torvalds <[email protected]>
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There is no other parent for device_list_add() except for
btrfs_scan_one_device(), which would set btrfs_fs_devices::total_devices
if device_list_add is successful and this can be done with in
device_list_add() itself.
Signed-off-by: Anand Jain <[email protected]>
Reviewed-by: Josef Bacik <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Commit 60999ca4b403 ("btrfs: make device scan less noisy")
adds return value 1 to device_list_add(), so that parent function can
call pr_info only when new device is added. Move the pr_info() part
into device_list_add() so that this function can be kept simple.
Signed-off-by: Anand Jain <[email protected]>
Reviewed-by: Josef Bacik <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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The btrfs_free_stale_devices() is updated to match for the given device
path and delete it. (It searches for only unmounted list of devices.)
Also drop the comment about different path being used for the same
device, since now we will have cli to clean any device that's not a
concern any more.
Signed-off-by: Anand Jain <[email protected]>
Reviewed-by: Josef Bacik <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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No functional changes.
Rename btrfs_free_stale_devices() arg to skip_dev, so that it
reflects what that arg for.
Signed-off-by: Anand Jain <[email protected]>
Reviewed-by: Josef Bacik <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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This updates btrfs_free_stale_devices() helper function to delete all
unmouted devices, when arg is NULL.
Signed-off-by: Anand Jain <[email protected]>
Reviewed-by: Josef Bacik <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Let the list iterator iterate further and find other stale
devices and delete it. This is in preparation to add support
for user land request-able stale devices cleanup. Also rename
btrfs_free_stale_device() to btrfs_free_stale_devices().
Signed-off-by: Anand Jain <[email protected]>
Reviewed-by: Josef Bacik <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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There is no need to check for btrfs_fs_devices::seeding when we
have checked for btrfs_fs_devices::opened, because we can't sprout
without its seed FS being opened.
Signed-off-by: Anand Jain <[email protected]>
Reviewed-by: Josef Bacik <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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