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Let's drop the open-coding of the parsing of the "voltage-ranges" DT
property and convert to use the common mmc_of_parse_voltage() API instead.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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All callers of mmc_wait_for_app_cmd() set the retries in-parameter to
MMC_CMD_RETRIES. This is silly, so let's just drop the in-parameter
altogether, as to simplify the code.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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mmc_wait_for_app_cmd() is an internal function for sd_ops.c, thus let's
drop the unnecessary export and turn it into static function.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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Also convert one existing user.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20190224153722.27020-9-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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When using -F + syntax to add a field the existing defaults are
currently all marked user_set. This can cause errors when some field is
missing in the perf.data
This patch tracks the actually user set fields separately, so that we don't
error out in this case.
Before:
% perf record true
% perf script -F +metric
Samples for 'cycles:ppp' event do not have CPU attribute set. Cannot print 'cpu' field.
%
After:
5 perf record true
% perf script -F +metric
perf 28936 278636.237688: 1 cycles:ppp: ffffffff8117da99 perf_event_exec+0x59 (/lib/modules/4.20.0-odilo/build/vmlinux)
...
%
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20190224153722.27020-2-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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SCC is used for SDR104/HS200/HS400. We need to change SCC_DT2FF
according to the mode. If it is inappropriate, CRC error tends to occur.
This adds variable "tap_hs400" for HS400 mode and configures SCC_DT2FF
as needed.
Signed-off-by: Takeshi Saito <takeshi.saito.xv@renesas.com>
[wsa: rebased to upstream and updated commit message]
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Tested-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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Add perf_data__open_dir_data to open files inside 'struct perf_data'
path directory:
static int perf_data__open_dir(struct perf_data *data);
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20190224190656.30163-10-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Add perf_data__create_dir() to create nr files inside 'struct perf_data'
path directory:
int perf_data__create_dir(struct perf_data *data, int nr);
and function to close that data:
void perf_data__close_dir(struct perf_data *data);
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20190224190656.30163-9-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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And display the error message from removing the old data file:
$ perf record ls
Can't remove old data: Permission denied (perf.data.old)
Perf session creation failed.
$ perf record ls
Can't remove old data: Unknown file found (perf.data.old)
Perf session creation failed.
Not sure how to make fail the rename (after we successfully remove the
destination file/dir) to show the message, anyway let's have it there.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20190224190656.30163-8-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Change check_backup() to call rm_rf_perf_data() instead of unlink() to
work over directory paths.
Also move the call earlier in the code, before we fork for file/dir, so
it can backup also directory data.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20190224190656.30163-7-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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To remove perf.data including the directory, with checking on expected
files and no other directories inside.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Suggested-by: Andi Kleen <ak@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20190224190656.30163-4-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Add pattern argument to rm_rf_depth() (and rename it to rm_rf_depth_pat())
to specify the name pattern files need to match inside the directory.
The function fails if we find different file to remove.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20190224190656.30163-3-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Adding depth argument to rm_rf (and renaming it to rm_rf_depth) to
specify the depth we will go searching for files to remove.
It will be used to specify single depth for perf.data directory removal
in following patch.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20190224190656.30163-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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There is a messy cast here:
min_t(int, len, (int)sizeof(*item)));
min_t() should normally cast to unsigned. It's not possible for "len"
to be negative, but if it were then we definitely wouldn't want to pass
negatives to read_extent_buffer(). Also there is an extra cast.
This patch shouldn't affect runtime, it's just a clean up.
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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At ctree.c:key_search(), the assertion that verifies the first key on a
child extent buffer corresponds to the key at a specific slot in the
parent has a disadvantage: we effectively hit a BUG_ON() which requires
rebooting the machine later. It also does not tell any information about
which extent buffer is affected, from which root, the expected and found
keys, etc.
However as of commit 581c1760415c48 ("btrfs: Validate child tree block's
level and first key"), that assertion is not needed since at the time we
read an extent buffer from disk we validate that its first key matches the
key, at the respective slot, in the parent extent buffer. Therefore just
remove the assertion at key_search().
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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The function map_private_extent_buffer() can return an -EINVAL error, and
it is called by generic_bin_search() which will return back the error. The
btrfs_bin_search() function in turn calls generic_bin_search() and the
key_search() function calls btrfs_bin_search(), so both can return the
-EINVAL error coming from the map_private_extent_buffer() function. Some
callers of these functions were ignoring that these functions can return
an error, so fix them to deal with error return values.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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We should drop the lock on this error path. This has been found by a
static tool.
The lock needs to be released, it's there to protect access to the
dev_replace members and is not supposed to be left locked. The value of
state that's being switched would need to be artifically changed to an
invalid value so the default: branch is taken.
Fixes: d189dd70e255 ("btrfs: fix use-after-free due to race between replace start and cancel")
CC: stable@vger.kernel.org # 5.0+
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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We recently had a customer issue with a corrupted filesystem. When
trying to mount this image btrfs panicked with a division by zero in
calc_stripe_length().
The corrupt chunk had a 'num_stripes' value of 1. calc_stripe_length()
takes this value and divides it by the number of copies the RAID profile
is expected to have to calculate the amount of data stripes. As a DUP
profile is expected to have 2 copies this division resulted in 1/2 = 0.
Later then the 'data_stripes' variable is used as a divisor in the
stripe length calculation which results in a division by 0 and thus a
kernel panic.
When encountering a filesystem with a DUP block group and a
'num_stripes' value unequal to 2, refuse mounting as the image is
corrupted and will lead to unexpected behaviour.
Code inspection showed a RAID1 block group has the same issues.
Fixes: e06cd3dd7cea ("Btrfs: add validadtion checks for chunk loading")
CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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The scrub_ctx csum_list member must be initialized before scrub_free_ctx
is called. If the csum_list is not initialized beforehand, the
list_empty call in scrub_free_csums will result in a null deref if the
allocation fails in the for loop.
Fixes: a2de733c78fa ("btrfs: scrub")
CC: stable@vger.kernel.org # 3.0+
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Dan Robertson <dan@dlrobertson.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Comparing the content of the pages in the range to deduplicate is now
done in generic_remap_checks called by the generic helper
generic_remap_file_range_prep(), which takes care of ensuring we do not
compare/deduplicate undefined data beyond a file's EOF (range from EOF
to the next block boundary). So remove these checks which are now
redundant.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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After a succession of renames operations of different files and unlinking
one of them, if we fsync one of the renamed files we can end up with a
log that will either fail to replay at mount time or result in a filesystem
that is in an inconsistent state. One example scenario:
$ mkfs.btrfs -f /dev/sdb
$ mount /dev/sdb /mnt
$ mkdir /mnt/testdir
$ touch /mnt/testdir/fname1
$ touch /mnt/testdir/fname2
$ sync
$ mv /mnt/testdir/fname1 /mnt/testdir/fname3
$ rm -f /mnt/testdir/fname2
$ ln /mnt/testdir/fname3 /mnt/testdir/fname2
$ touch /mnt/testdir/fname1
$ xfs_io -c "fsync" /mnt/testdir/fname1
<power failure>
$ mount /dev/sdb /mnt
$ umount /mnt
$ btrfs check /dev/sdb
[1/7] checking root items
[2/7] checking extents
[3/7] checking free space cache
[4/7] checking fs roots
root 5 inode 259 errors 2, no orphan item
ERROR: errors found in fs roots
Opening filesystem to check...
Checking filesystem on /dev/sdc
UUID: 20e4abb8-5a19-4492-8bb4-6084125c2d0d
found 393216 bytes used, error(s) found
total csum bytes: 0
total tree bytes: 131072
total fs tree bytes: 32768
total extent tree bytes: 16384
btree space waste bytes: 122986
file data blocks allocated: 262144
referenced 262144
On a kernel without the first patch in this series, titled
"[PATCH] Btrfs: fix fsync after succession of renames of different files",
we get instead an error when mounting the filesystem due to failure of
replaying the log:
$ mount /dev/sdb /mnt
mount: mount /dev/sdb on /mnt failed: File exists
Fix this by logging the parent directory of an inode whenever we find an
inode that no longer exists (was unlinked in the current transaction),
during the procedure which finds inodes that have old names that collide
with new names of other inodes.
A test case for fstests follows soon.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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After a succession of rename operations of different files and fsyncing
one of them, such that each file gets a new name that corresponds to an
old name of another file, we can end up with a log that will cause a
failure when attempted to replay at mount time (an EEXIST error).
We currently have correct behaviour when such succession of renames
involves only two files, but if there are more files involved, we end up
not logging all the inodes that are needed, therefore resulting in a
failure when attempting to replay the log.
Example:
$ mkfs.btrfs -f /dev/sdb
$ mount /dev/sdb /mnt
$ mkdir /mnt/testdir
$ touch /mnt/testdir/fname1
$ touch /mnt/testdir/fname2
$ sync
$ mv /mnt/testdir/fname1 /mnt/testdir/fname3
$ mv /mnt/testdir/fname2 /mnt/testdir/fname4
$ ln /mnt/testdir/fname3 /mnt/testdir/fname2
$ touch /mnt/testdir/fname1
$ xfs_io -c "fsync" /mnt/testdir/fname1
<power failure>
$ mount /dev/sdb /mnt
mount: mount /dev/sdb on /mnt failed: File exists
So fix this by checking all inode dependencies when logging an inode. That
is, if one logged inode A has a new name that matches the old name of some
other inode B, check if inode B has a new name that matches the old name
of some other inode C, and so on. This fix is implemented not by doing any
recursive function calls but by using an iterative method using a linked
list that is used in a first-in-first-out fashion.
A test case for fstests follows soon.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Qgroups will do the old roots lookup at delayed ref time, which could be
while walking down the extent root while running a delayed ref. This
should be fine, except we specifically lock eb's in the backref walking
code irrespective of path->skip_locking, which deadlocks the system.
Fix up the backref code to honor path->skip_locking, nobody will be
modifying the commit_root when we're searching so it's completely safe
to do.
This happens since fb235dc06fac ("btrfs: qgroup: Move half of the qgroup
accounting time out of commit trans"), kernel may lockup with quota
enabled.
There is one backref trace triggered by snapshot dropping along with
write operation in the source subvolume. The example can be reliably
reproduced:
btrfs-cleaner D 0 4062 2 0x80000000
Call Trace:
schedule+0x32/0x90
btrfs_tree_read_lock+0x93/0x130 [btrfs]
find_parent_nodes+0x29b/0x1170 [btrfs]
btrfs_find_all_roots_safe+0xa8/0x120 [btrfs]
btrfs_find_all_roots+0x57/0x70 [btrfs]
btrfs_qgroup_trace_extent_post+0x37/0x70 [btrfs]
btrfs_qgroup_trace_leaf_items+0x10b/0x140 [btrfs]
btrfs_qgroup_trace_subtree+0xc8/0xe0 [btrfs]
do_walk_down+0x541/0x5e3 [btrfs]
walk_down_tree+0xab/0xe7 [btrfs]
btrfs_drop_snapshot+0x356/0x71a [btrfs]
btrfs_clean_one_deleted_snapshot+0xb8/0xf0 [btrfs]
cleaner_kthread+0x12b/0x160 [btrfs]
kthread+0x112/0x130
ret_from_fork+0x27/0x50
When dropping snapshots with qgroup enabled, we will trigger backref
walk.
However such backref walk at that timing is pretty dangerous, as if one
of the parent nodes get WRITE locked by other thread, we could cause a
dead lock.
For example:
FS 260 FS 261 (Dropped)
node A node B
/ \ / \
node C node D node E
/ \ / \ / \
leaf F|leaf G|leaf H|leaf I|leaf J|leaf K
The lock sequence would be:
Thread A (cleaner) | Thread B (other writer)
-----------------------------------------------------------------------
write_lock(B) |
write_lock(D) |
^^^ called by walk_down_tree() |
| write_lock(A)
| write_lock(D) << Stall
read_lock(H) << for backref walk |
read_lock(D) << lock owner is |
the same thread A |
so read lock is OK |
read_lock(A) << Stall |
So thread A hold write lock D, and needs read lock A to unlock.
While thread B holds write lock A, while needs lock D to unlock.
This will cause a deadlock.
This is not only limited to snapshot dropping case. As the backref
walk, even only happens on commit trees, is breaking the normal top-down
locking order, makes it deadlock prone.
Fixes: fb235dc06fac ("btrfs: qgroup: Move half of the qgroup accounting time out of commit trans")
CC: stable@vger.kernel.org # 4.14+
Reported-and-tested-by: David Sterba <dsterba@suse.com>
Reported-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
[ rebase to latest branch and fix lock assert bug in btrfs/007 ]
Signed-off-by: Qu Wenruo <wqu@suse.com>
[ copy logs and deadlock analysis from Qu's patch ]
Signed-off-by: David Sterba <dsterba@suse.com>
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[BUG]
Btrfs qgroup will still hit EDQUOT under the following case:
$ dev=/dev/test/test
$ mnt=/mnt/btrfs
$ umount $mnt &> /dev/null
$ umount $dev &> /dev/null
$ mkfs.btrfs -f $dev
$ mount $dev $mnt -o nospace_cache
$ btrfs subv create $mnt/subv
$ btrfs quota enable $mnt
$ btrfs quota rescan -w $mnt
$ btrfs qgroup limit -e 1G $mnt/subv
$ fallocate -l 900M $mnt/subv/padding
$ sync
$ rm $mnt/subv/padding
# Hit EDQUOT
$ xfs_io -f -c "pwrite 0 512M" $mnt/subv/real_file
[CAUSE]
Since commit a514d63882c3 ("btrfs: qgroup: Commit transaction in advance
to reduce early EDQUOT"), btrfs is not forced to commit transaction to
reclaim more quota space.
Instead, we just check pertrans metadata reservation against some
threshold and try to do asynchronously transaction commit.
However in above case, the pertrans metadata reservation is pretty small
thus it will never trigger asynchronous transaction commit.
[FIX]
Instead of only accounting pertrans metadata reservation, we calculate
how much free space we have, and if there isn't much free space left,
commit transaction asynchronously to try to free some space.
This may slow down the fs when we have less than 32M free qgroup space,
but should reduce a lot of false EDQUOT, so the cost should be
acceptable.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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btrfs_qgroup_extent_record
[BUG]
Btrfs/139 will fail with a high probability if the testing machine (VM)
has only 2G RAM.
Resulting the final write success while it should fail due to EDQUOT,
and the fs will have quota exceeding the limit by 16K.
The simplified reproducer will be: (needs a 2G ram VM)
$ mkfs.btrfs -f $dev
$ mount $dev $mnt
$ btrfs subv create $mnt/subv
$ btrfs quota enable $mnt
$ btrfs quota rescan -w $mnt
$ btrfs qgroup limit -e 1G $mnt/subv
$ for i in $(seq -w 1 8); do
xfs_io -f -c "pwrite 0 128M" $mnt/subv/file_$i > /dev/null
echo "file $i written" > /dev/kmsg
done
$ sync
$ btrfs qgroup show -pcre --raw $mnt
The last pwrite will not trigger EDQUOT and final 'qgroup show' will
show something like:
qgroupid rfer excl max_rfer max_excl parent child
-------- ---- ---- -------- -------- ------ -----
0/5 16384 16384 none none --- ---
0/256 1073758208 1073758208 none 1073741824 --- ---
And 1073758208 is larger than
> 1073741824.
[CAUSE]
It's a bug in btrfs qgroup data reserved space management.
For quota limit, we must ensure that:
reserved (data + metadata) + rfer/excl <= limit
Since rfer/excl is only updated at transaction commmit time, reserved
space needs to be taken special care.
One important part of reserved space is data, and for a new data extent
written to disk, we still need to take the reserved space until
rfer/excl numbers get updated.
Originally when an ordered extent finishes, we migrate the reserved
qgroup data space from extent_io tree to delayed ref head of the data
extent, expecting delayed ref will only be cleaned up at commit
transaction time.
However for small RAM machine, due to memory pressure dirty pages can be
flushed back to disk without committing a transaction.
The related events will be something like:
file 1 written
btrfs_finish_ordered_io: ino=258 ordered offset=0 len=54947840
btrfs_finish_ordered_io: ino=258 ordered offset=54947840 len=5636096
btrfs_finish_ordered_io: ino=258 ordered offset=61153280 len=57344
btrfs_finish_ordered_io: ino=258 ordered offset=61210624 len=8192
btrfs_finish_ordered_io: ino=258 ordered offset=60583936 len=569344
cleanup_ref_head: num_bytes=54947840
cleanup_ref_head: num_bytes=5636096
cleanup_ref_head: num_bytes=569344
cleanup_ref_head: num_bytes=57344
cleanup_ref_head: num_bytes=8192
^^^^^^^^^^^^^^^^ This will free qgroup data reserved space
file 2 written
...
file 8 written
cleanup_ref_head: num_bytes=8192
...
btrfs_commit_transaction <<< the only transaction committed during
the test
When file 2 is written, we have already freed 128M reserved qgroup data
space for ino 258. Thus later write won't trigger EDQUOT.
This allows us to write more data beyond qgroup limit.
In my 2G ram VM, it could reach about 1.2G before hitting EDQUOT.
[FIX]
By moving reserved qgroup data space from btrfs_delayed_ref_head to
btrfs_qgroup_extent_record, we can ensure that reserved qgroup data
space won't be freed half way before commit transaction, thus fix the
problem.
Fixes: f64d5ca86821 ("btrfs: delayed_ref: Add new function to record reserved space into delayed ref")
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
The member btrfs_fs_info::scrub_nocow_workers is unused since the nocow
optimization was removed from scrub in 9bebe665c3e4 ("btrfs: scrub:
Remove unused copy_nocow_pages and its callchain").
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
The scrub worker pointers are not NULL iff the scrub is running, so
reset them back once the last reference is dropped. Add assertions to
the initial phase of scrub to verify that.
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
Use the refcount_t for fs_info::scrub_workers_refcnt instead of int so
we get the extra checks. All reference changes are still done under
scrub_lock.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
scrub_workers_refcnt is protected by scrub_lock, add lockdep_assert_held()
in scrub_workers_get().
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Suggested-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
This fixes a longstanding lockdep warning triggered by
fstests/btrfs/011.
Circular locking dependency check reports warning[1], that's because the
btrfs_scrub_dev() calls the stack #0 below with, the fs_info::scrub_lock
held. The test case leading to this warning:
$ mkfs.btrfs -f /dev/sdb
$ mount /dev/sdb /btrfs
$ btrfs scrub start -B /btrfs
In fact we have fs_info::scrub_workers_refcnt to track if the init and destroy
of the scrub workers are needed. So once we have incremented and decremented
the fs_info::scrub_workers_refcnt value in the thread, its ok to drop the
scrub_lock, and then actually do the btrfs_destroy_workqueue() part. So this
patch drops the scrub_lock before calling btrfs_destroy_workqueue().
[359.258534] ======================================================
[359.260305] WARNING: possible circular locking dependency detected
[359.261938] 5.0.0-rc6-default #461 Not tainted
[359.263135] ------------------------------------------------------
[359.264672] btrfs/20975 is trying to acquire lock:
[359.265927] 00000000d4d32bea ((wq_completion)"%s-%s""btrfs", name){+.+.}, at: flush_workqueue+0x87/0x540
[359.268416]
[359.268416] but task is already holding lock:
[359.270061] 0000000053ea26a6 (&fs_info->scrub_lock){+.+.}, at: btrfs_scrub_dev+0x322/0x590 [btrfs]
[359.272418]
[359.272418] which lock already depends on the new lock.
[359.272418]
[359.274692]
[359.274692] the existing dependency chain (in reverse order) is:
[359.276671]
[359.276671] -> #3 (&fs_info->scrub_lock){+.+.}:
[359.278187] __mutex_lock+0x86/0x9c0
[359.279086] btrfs_scrub_pause+0x31/0x100 [btrfs]
[359.280421] btrfs_commit_transaction+0x1e4/0x9e0 [btrfs]
[359.281931] close_ctree+0x30b/0x350 [btrfs]
[359.283208] generic_shutdown_super+0x64/0x100
[359.284516] kill_anon_super+0x14/0x30
[359.285658] btrfs_kill_super+0x12/0xa0 [btrfs]
[359.286964] deactivate_locked_super+0x29/0x60
[359.288242] cleanup_mnt+0x3b/0x70
[359.289310] task_work_run+0x98/0xc0
[359.290428] exit_to_usermode_loop+0x83/0x90
[359.291445] do_syscall_64+0x15b/0x180
[359.292598] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[359.294011]
[359.294011] -> #2 (sb_internal#2){.+.+}:
[359.295432] __sb_start_write+0x113/0x1d0
[359.296394] start_transaction+0x369/0x500 [btrfs]
[359.297471] btrfs_finish_ordered_io+0x2aa/0x7c0 [btrfs]
[359.298629] normal_work_helper+0xcd/0x530 [btrfs]
[359.299698] process_one_work+0x246/0x610
[359.300898] worker_thread+0x3c/0x390
[359.302020] kthread+0x116/0x130
[359.303053] ret_from_fork+0x24/0x30
[359.304152]
[359.304152] -> #1 ((work_completion)(&work->normal_work)){+.+.}:
[359.306100] process_one_work+0x21f/0x610
[359.307302] worker_thread+0x3c/0x390
[359.308465] kthread+0x116/0x130
[359.309357] ret_from_fork+0x24/0x30
[359.310229]
[359.310229] -> #0 ((wq_completion)"%s-%s""btrfs", name){+.+.}:
[359.311812] lock_acquire+0x90/0x180
[359.312929] flush_workqueue+0xaa/0x540
[359.313845] drain_workqueue+0xa1/0x180
[359.314761] destroy_workqueue+0x17/0x240
[359.315754] btrfs_destroy_workqueue+0x57/0x200 [btrfs]
[359.317245] scrub_workers_put+0x2c/0x60 [btrfs]
[359.318585] btrfs_scrub_dev+0x336/0x590 [btrfs]
[359.319944] btrfs_dev_replace_by_ioctl.cold.19+0x179/0x1bb [btrfs]
[359.321622] btrfs_ioctl+0x28a4/0x2e40 [btrfs]
[359.322908] do_vfs_ioctl+0xa2/0x6d0
[359.324021] ksys_ioctl+0x3a/0x70
[359.325066] __x64_sys_ioctl+0x16/0x20
[359.326236] do_syscall_64+0x54/0x180
[359.327379] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[359.328772]
[359.328772] other info that might help us debug this:
[359.328772]
[359.330990] Chain exists of:
[359.330990] (wq_completion)"%s-%s""btrfs", name --> sb_internal#2 --> &fs_info->scrub_lock
[359.330990]
[359.334376] Possible unsafe locking scenario:
[359.334376]
[359.336020] CPU0 CPU1
[359.337070] ---- ----
[359.337821] lock(&fs_info->scrub_lock);
[359.338506] lock(sb_internal#2);
[359.339506] lock(&fs_info->scrub_lock);
[359.341461] lock((wq_completion)"%s-%s""btrfs", name);
[359.342437]
[359.342437] *** DEADLOCK ***
[359.342437]
[359.343745] 1 lock held by btrfs/20975:
[359.344788] #0: 0000000053ea26a6 (&fs_info->scrub_lock){+.+.}, at: btrfs_scrub_dev+0x322/0x590 [btrfs]
[359.346778]
[359.346778] stack backtrace:
[359.347897] CPU: 0 PID: 20975 Comm: btrfs Not tainted 5.0.0-rc6-default #461
[359.348983] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.11.2-0-gf9626cc-prebuilt.qemu-project.org 04/01/2014
[359.350501] Call Trace:
[359.350931] dump_stack+0x67/0x90
[359.351676] print_circular_bug.isra.37.cold.56+0x15c/0x195
[359.353569] check_prev_add.constprop.44+0x4f9/0x750
[359.354849] ? check_prev_add.constprop.44+0x286/0x750
[359.356505] __lock_acquire+0xb84/0xf10
[359.357505] lock_acquire+0x90/0x180
[359.358271] ? flush_workqueue+0x87/0x540
[359.359098] flush_workqueue+0xaa/0x540
[359.359912] ? flush_workqueue+0x87/0x540
[359.360740] ? drain_workqueue+0x1e/0x180
[359.361565] ? drain_workqueue+0xa1/0x180
[359.362391] drain_workqueue+0xa1/0x180
[359.363193] destroy_workqueue+0x17/0x240
[359.364539] btrfs_destroy_workqueue+0x57/0x200 [btrfs]
[359.365673] scrub_workers_put+0x2c/0x60 [btrfs]
[359.366618] btrfs_scrub_dev+0x336/0x590 [btrfs]
[359.367594] ? start_transaction+0xa1/0x500 [btrfs]
[359.368679] btrfs_dev_replace_by_ioctl.cold.19+0x179/0x1bb [btrfs]
[359.369545] btrfs_ioctl+0x28a4/0x2e40 [btrfs]
[359.370186] ? __lock_acquire+0x263/0xf10
[359.370777] ? kvm_clock_read+0x14/0x30
[359.371392] ? kvm_sched_clock_read+0x5/0x10
[359.372248] ? sched_clock+0x5/0x10
[359.372786] ? sched_clock_cpu+0xc/0xc0
[359.373662] ? do_vfs_ioctl+0xa2/0x6d0
[359.374552] do_vfs_ioctl+0xa2/0x6d0
[359.375378] ? do_sigaction+0xff/0x250
[359.376233] ksys_ioctl+0x3a/0x70
[359.376954] __x64_sys_ioctl+0x16/0x20
[359.377772] do_syscall_64+0x54/0x180
[359.378841] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[359.380422] RIP: 0033:0x7f5429296a97
Backporting to older kernels: scrub_nocow_workers must be freed the same
way as the others.
CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Anand Jain <anand.jain@oracle.com>
[ update changelog ]
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
We have killed volume mutex (commit: dccdb07bc996
btrfs: kill btrfs_fs_info::volume_mutex). This a trival one seems to have
escaped.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
There is no need to forward declare flush_write_bio(), as it only
depends on submit_one_bio(). Both of them are pretty small, just move
them to kill the forward declaration.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
The variables and function parameters of __etree_search which pertain to
prev/next are grossly misnamed. Namely, prev_ret holds the next state
and not the previous. Similarly, next_ret actually holds the previous
extent state relating to the offset we are interested in. Fix this by
renaming the variables as well as switching the arguments order. No
functional changes.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
With the refactoring introduced in 8b62f87bad9c ("Btrfs: reworki
outstanding_extents") this flag became unused. Remove it and renumber
the following flags accordingly. No functional changes.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
There is no point in using a construct like 'if (!condition)
WARN_ON(1)'. Use WARN_ON(!condition) directly. No functional changes.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
We could generate a lot of delayed refs in evict but never have any left
over space from our block rsv to make up for that fact. So reserve some
extra space and give it to the transaction so it can be used to refill
the delayed refs rsv every loop through the truncate path.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
For FLUSH_LIMIT flushers we really can only allocate chunks and flush
delayed inode items, everything else is problematic. I added a bunch of
new states and it lead to weirdness in the FLUSH_LIMIT case because I
forgot about how it worked. So instead explicitly declare the states
that are ok for flushing with FLUSH_LIMIT and use that for our state
machine. Then as we add new things that are safe we can just add them
to this list.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
With severe fragmentation we can end up with our inode rsv size being
huge during writeout, which would cause us to need to make very large
metadata reservations.
However we may not actually need that much once writeout is complete,
because of the over-reservation for the worst case.
So instead try to make our reservation, and if we couldn't make it
re-calculate our new reservation size and try again. If our reservation
size doesn't change between tries then we know we are actually out of
space and can error. Flushing that could have been running in parallel
did not make any space.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
[ rename to calc_refill_bytes, update comment and changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
With the introduction of the per-inode block_rsv it became possible to
have really really large reservation requests made because of data
fragmentation. Since the ticket stuff assumed that we'd always have
relatively small reservation requests it just killed all tickets if we
were unable to satisfy the current request.
However, this is generally not the case anymore. So fix this logic to
instead see if we had a ticket that we were able to give some
reservation to, and if we were continue the flushing loop again.
Likewise we make the tickets use the space_info_add_old_bytes() method
of returning what reservation they did receive in hopes that it could
satisfy reservations down the line.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
We've done this forever because of the voodoo around knowing how much
space we have. However, we have better ways of doing this now, and on
normal file systems we'll easily have a global reserve of 512MiB, and
since metadata chunks are usually 1GiB that means we'll allocate
metadata chunks more readily. Instead use the actual used amount when
determining if we need to allocate a chunk or not.
This has a side effect for mixed block group fs'es where we are no
longer allocating enough chunks for the data/metadata requirements. To
deal with this add a ALLOC_CHUNK_FORCE step to the flushing state
machine. This will only get used if we've already made a full loop
through the flushing machinery and tried committing the transaction.
If we have then we can try and force a chunk allocation since we likely
need it to make progress. This resolves issues I was seeing with
the mixed bg tests in xfstests without the new flushing state.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
[ merged with patch "add ALLOC_CHUNK_FORCE to the flushing code" ]
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
For enospc_debug having the block rsvs is super helpful to see if we've
done something wrong.
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
may_commit_transaction will skip committing the transaction if we don't
have enough pinned space or if we're trying to find space for a SYSTEM
chunk. However, if we have pending free block groups in this transaction
we still want to commit as we may be able to allocate a chunk to make
our reservation. So instead of just returning ENOSPC, check if we have
free block groups pending, and if so commit the transaction to allow us
to use that free space.
Reviewed-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
Zstd compression requires different amounts of memory for each level of
compression. The prior patches implemented indirection to allow for each
compression type to manage their workspaces independently. This patch
uses this indirection to implement compression level support for zstd.
To manage the additional memory require, each compression level has its
own queue of workspaces. A global LRU is used to help with reclaim.
Reclaim is done via a timer which provides a mechanism to decrease
memory utilization by keeping only workspaces around that are sized
appropriately. Forward progress is guaranteed by a preallocated max
workspace hidden from the LRU.
When getting a workspace, it uses a bitmap to identify the levels that
are populated and scans up. If it finds a workspace that is greater than
it, it uses it, but does not update the last_used time and the
corresponding place in the LRU. If we hit memory pressure, we sleep on
the max level workspace. We continue to rescan in case we can use a
smaller workspace, but eventually should be able to obtain the max level
workspace or allocate one again should memory pressure subside.
The memory requirement for decompression is the same as level 1, and
therefore can use any of available workspace.
The number of workspaces is bound by an upper limit of the workqueue's
limit which currently is 2 (percpu limit). The reclaim timer is used to
free inactive/improperly sized workspaces and is set to 307s to avoid
colliding with transaction commit (every 30s).
Repeating the experiment from v2 [1], the Silesia corpus was copied to a
btrfs filesystem 10 times and then read back after dropping the caches.
The btrfs filesystem was on an SSD.
Level Ratio Compression (MB/s) Decompression (MB/s) Memory (KB)
1 2.658 438.47 910.51 780
2 2.744 364.86 886.55 1004
3 2.801 336.33 828.41 1260
4 2.858 286.71 886.55 1260
5 2.916 212.77 556.84 1388
6 2.363 119.82 990.85 1516
7 3.000 154.06 849.30 1516
8 3.011 159.54 875.03 1772
9 3.025 100.51 940.15 1772
10 3.033 118.97 616.26 1772
11 3.036 94.19 802.11 1772
12 3.037 73.45 931.49 1772
13 3.041 55.17 835.26 2284
14 3.087 44.70 716.78 2547
15 3.126 37.30 878.84 2547
[1] https://lore.kernel.org/linux-btrfs/20181031181108.289340-1-terrelln@fb.com/
Cc: Nick Terrell <terrelln@fb.com>
Cc: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
It is possible based on the level configurations that a higher level
workspace uses less memory than a lower level workspace. In order to
reuse workspaces, this must be made a monotonic relationship. This
precomputes the required memory for each level and enforces the
monotonicity between level and memory required. This is also done
in upstream zstd in [1].
[1] https://github.com/facebook/zstd/commit/a68b76afefec6876f8e8a538155109a5aeac0143
Cc: Nick Terrell <terrelln@fb.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
Zstd currently only supports the default level of compression. This
patch switches to using the level passed in for btrfs zstd
configuration.
Zstd workspaces now keep track of the requested level as this can differ
from the size of the workspace.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
Currently, the only user of set_level() is zlib which sets an internal
workspace parameter. As level is now plumbed into get_workspace(), this
can be handled there rather than separately.
This repurposes set_level() to bound the level passed in so it can be
used when setting the mounts compression level and as well as verifying
the level before getting a workspace. The other benefit is this divides
the meaning of compress(0) and get_workspace(0). The former means we
want to use the default compression level of the compression type. The
latter means we can use any workspace available.
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
Zlib compression supports multiple levels, but doesn't require changing
in how a workspace itself is created and managed. Zstd introduces a
different memory requirement such that higher levels of compression
require more memory.
This requires changes in how the alloc()/get() methods work for zstd.
This pach plumbs compression level through the interface as a parameter
in preparation for zstd compression levels. This gives the compression
types opportunity to create/manage based on the compression level.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
The previous patch added generic helpers for get_workspace() and
put_workspace(). Now, we can migrate ownership of the workspace_manager
to be in the compression type code as the compression code itself
doesn't care beyond being able to get a workspace. The init/cleanup and
get/put methods are abstracted so each compression algorithm can decide
how they want to manage their workspaces.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
There are two levels of workspace management. First, alloc()/free()
which are responsible for actually creating and destroy workspaces.
Second, at a higher level, get()/put() which is the compression code
asking for a workspace from a workspace_manager.
The compression code shouldn't really care how it gets a workspace, but
that it got a workspace. This adds get_workspace() and put_workspace()
to be the higher level interface which is responsible for indexing into
the appropriate compression type. It also introduces
btrfs_put_workspace() and btrfs_get_workspace() to be the generic
implementations of the higher interface.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
Workspace manager init and cleanup code is open coded inside a for loop
over the compression types. This forces each compression type to rely on
the same workspace manager implementation. This patch creates helper
methods that will be the generic implementation for btrfs workspace
management.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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