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linux-stable/fs/btrfs
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Johannes Thumshirn fceed91ea1 btrfs: fix percent calculation for bg reclaim message 
commit 95cd356ca2 upstream.

We have a report, that the info message for block-group reclaim is
crossing the 100% used mark.

This is happening as we were truncating the divisor for the division
(the block_group->length) to a 32bit value.

Fix this by using div64_u64() to not truncate the divisor.

In the worst case, it can lead to a div by zero error and should be
possible to trigger on 4 disks RAID0, and each device is large enough:

  $ mkfs.btrfs  -f /dev/test/scratch[1234] -m raid1 -d raid0
  btrfs-progs v6.1
  [...]
  Filesystem size:    40.00GiB
  Block group profiles:
    Data:             RAID0             4.00GiB <<<
    Metadata:         RAID1           256.00MiB
    System:           RAID1             8.00MiB

Reported-by: Forza <forza@tnonline.net>
Link: https://lore.kernel.org/linux-btrfs/e99483.c11a58d.1863591ca52@tnonline.net/
Fixes: 5f93e776c6 ("btrfs: zoned: print unusable percentage when reclaiming block groups")
CC: stable@vger.kernel.org # 5.15+
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ add Qu's note ]
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-17 08:50:14 +01:00
..
tests for-6.1-rc4-tag 2022-11-10 08:58:29 -08:00
acl.c btrfs: reserve correct number of items for inode creation 2022-05-16 17:03:08 +02:00
async-thread.c btrfs: simplify WQ_HIGHPRI handling in struct btrfs_workqueue 2022-05-16 17:03:15 +02:00
async-thread.h btrfs: remove unused typedefs get_extent_t and btrfs_work_func_t 2022-07-25 17:45:36 +02:00
backref.c btrfs: fix resolving backrefs for inline extent followed by prealloc 2023-01-07 11:11:38 +01:00
backref.h btrfs: ignore fiemap path cache if we have multiple leaves for a data extent 2022-10-11 14:48:07 +02:00
block-group.c btrfs: fix percent calculation for bg reclaim message 2023-03-17 08:50:14 +01:00
block-group.h btrfs: move btrfs_full_stripe_locks_tree into block-group.h 2022-09-26 12:28:06 +02:00
block-rsv.c btrfs: add KCSAN annotations for unlocked access to block_rsv->full 2022-09-26 12:28:02 +02:00
block-rsv.h btrfs: add KCSAN annotations for unlocked access to block_rsv->full 2022-09-26 12:28:02 +02:00
btrfs_inode.h btrfs: use a runtime flag to indicate an inode is a free space inode 2022-09-26 12:28:07 +02:00
check-integrity.c fs/btrfs: Use the enum req_op and blk_opf_t types 2022-07-14 12:14:32 -06:00
check-integrity.h btrfs: check-integrity: split submit_bio from btrfsic checking 2022-05-16 17:03:12 +02:00
compression.c fs: fix leaked psi pressure state 2022-11-08 15:57:25 -08:00
compression.h for-5.20-tag 2022-08-03 14:54:52 -07:00
ctree.c btrfs: fix assertion failure and blocking during nowait buffered write 2022-11-15 15:01:01 +01:00
ctree.h btrfs: zoned: enable metadata over-commit for non-ZNS setup 2023-02-01 08:34:34 +01:00
delalloc-space.c btrfs: add the ability to use NO_FLUSH for data reservations 2022-09-29 17:08:28 +02:00
delalloc-space.h btrfs: add the ability to use NO_FLUSH for data reservations 2022-09-29 17:08:28 +02:00
delayed-inode.c btrfs: use delayed items when logging a directory 2022-09-26 12:27:57 +02:00
delayed-inode.h btrfs: use delayed items when logging a directory 2022-09-26 12:27:57 +02:00
delayed-ref.c btrfs: switch btrfs_block_rsv::full to bool 2022-07-25 17:45:40 +02:00
delayed-ref.h btrfs: remove btrfs_delayed_extent_op::is_data 2022-05-16 17:17:31 +02:00
dev-replace.c btrfs: don't take a bio_counter reference for cloned bios 2022-09-26 12:27:58 +02:00
dev-replace.h btrfs: add struct declarations in dev-replace.h 2022-09-26 12:28:07 +02:00
dir-item.c btrfs: use btrfs_for_each_slot in btrfs_search_dir_index_item 2022-05-16 17:03:07 +02:00
discard.c btrfs: hold block group refcount during async discard 2023-03-10 09:34:06 +01:00
discard.h
disk-io.c btrfs: do not abort transaction on failure to write log tree when syncing log 2023-01-24 07:24:36 +01:00
disk-io.h btrfs: fix compat_ro checks against remount 2023-01-12 12:01:56 +01:00
export.c btrfs: fix type of parameter generation in btrfs_get_dentry 2022-10-24 15:28:58 +02:00
export.h btrfs: fix type of parameter generation in btrfs_get_dentry 2022-10-24 15:28:58 +02:00
extent-io-tree.c btrfs: fix off-by-one in delalloc search during lseek 2023-01-12 12:01:56 +01:00
extent-io-tree.h btrfs: stop tracking failed reads in the I/O tree 2022-09-26 12:28:05 +02:00
extent-tree.c btrfs: always report error in run_one_delayed_ref() 2023-01-24 07:24:31 +01:00
extent_io.c btrfs: lock the inode in shared mode before starting fiemap 2023-02-22 12:59:40 +01:00
extent_io.h btrfs: move extent io tree unrelated prototypes to their appropriate header 2022-09-26 12:28:04 +02:00
extent_map.c btrfs: drop extent map range more efficiently 2022-09-29 17:08:31 +02:00
extent_map.h btrfs: add helper to replace extent map range with a new extent map 2022-09-29 17:08:30 +02:00
file-item.c btrfs: make can_nocow_extent nowait compatible 2022-09-29 17:08:26 +02:00
file.c btrfs: move the auto defrag code to defrag.c 2023-02-22 12:59:40 +01:00
free-space-cache.c btrfs: move btrfs_drop_extent_cache() to extent_map.c 2022-09-29 17:08:30 +02:00
free-space-cache.h btrfs: remove use btrfs_remove_free_space_cache instead of variant 2022-09-26 12:27:58 +02:00
free-space-tree.c btrfs: get rid of block group caching progress logic 2022-09-26 12:27:58 +02:00
free-space-tree.h
inode-item.c btrfs: make should_throttle loop local in btrfs_truncate_inode_items 2022-01-07 14:18:25 +01:00
inode-item.h btrfs: add inode to truncate control 2022-01-07 14:18:24 +01:00
inode.c for-6.1-rc3-tag 2022-11-03 11:12:48 -07:00
ioctl.c use less confusing names for iov_iter direction initializers 2023-02-09 11:28:04 +01:00
Kconfig btrfs: use generic Kconfig option for 256kB page size limit 2022-01-20 08:52:55 +02:00
locking.c btrfs: implement a nowait option for tree searches 2022-09-26 12:46:42 +02:00
locking.h btrfs: implement a nowait option for tree searches 2022-09-26 12:46:42 +02:00
lzo.c btrfs: replace kmap() with kmap_local_page() in lzo.c 2022-07-25 17:45:33 +02:00
Makefile btrfs: move extent state init and alloc functions to their own file 2022-09-26 12:28:03 +02:00
misc.h btrfs: convert the io_failure_tree to a plain rb_tree 2022-09-26 12:28:02 +02:00
ordered-data.c btrfs: add btrfs_try_lock_ordered_range 2022-09-29 17:08:28 +02:00
ordered-data.h btrfs: add btrfs_try_lock_ordered_range 2022-09-29 17:08:28 +02:00
orphan.c
print-tree.c btrfs: unify the error handling pattern for read_tree_block() 2022-03-14 13:13:53 +01:00
print-tree.h
props.c btrfs: remove the unnecessary result variables 2022-09-26 12:28:00 +02:00
props.h btrfs: move common inode creation code into btrfs_create_new_inode() 2022-05-16 17:03:08 +02:00
qgroup.c btrfs: fix race between quota rescan and disable leading to NULL pointer deref 2023-01-24 07:24:36 +01:00
qgroup.h btrfs: introduce BTRFS_QGROUP_RUNTIME_FLAG_NO_ACCOUNTING to skip qgroup accounting 2022-09-26 12:28:01 +02:00
raid56.c btrfs: raid56: avoid double freeing for rbio if full_stripe_write() failed 2022-10-24 15:26:56 +02:00
raid56.h btrfs: properly abstract the parity raid bio handling 2022-09-26 12:27:59 +02:00
rcu-string.h btrfs: replace strncpy() with strscpy() 2023-01-12 12:01:55 +01:00
ref-verify.c btrfs: stop accessing ->extent_root directly 2022-01-03 15:09:49 +01:00
ref-verify.h
reflink.c btrfs: replace delete argument with EXTENT_CLEAR_ALL_BITS 2022-09-26 12:28:05 +02:00
reflink.h
relocation.c btrfs: add helper to replace extent map range with a new extent map 2022-09-29 17:08:30 +02:00
root-tree.c btrfs: simplify error handling at btrfs_del_root_ref() 2022-09-26 12:27:58 +02:00
scrub.c btrfs: scrub: improve tree block error reporting 2023-03-10 09:33:46 +01:00
send.c btrfs: send: limit number of clones and allocated memory size 2023-03-03 11:52:21 +01:00
send.h btrfs: send: allow protocol version 3 with CONFIG_BTRFS_DEBUG 2022-10-11 14:46:55 +02:00
space-info.c btrfs: zoned: enable metadata over-commit for non-ZNS setup 2023-02-01 08:34:34 +01:00
space-info.h btrfs: move btrfs_init_async_reclaim_work prototype to space-info.h 2022-09-26 12:28:06 +02:00
struct-funcs.c btrfs: remove redundant check in up check_setget_bounds 2022-07-25 17:45:33 +02:00
subpage.c btrfs: convert process_page_range() to use filemap_get_folios_contig() 2022-09-11 20:26:03 -07:00
subpage.h btrfs: make nodesize >= PAGE_SIZE case to reuse the non-subpage routine 2022-05-16 17:03:11 +02:00
super.c btrfs: fix compat_ro checks against remount 2023-01-12 12:01:56 +01:00
sysfs.c btrfs: sysfs: normalize the error handling branch in btrfs_init_sysfs() 2022-11-23 16:52:22 +01:00
sysfs.h
transaction.c btrfs: don't init io tree with private data for non-inodes 2022-09-26 12:28:05 +02:00
transaction.h btrfs: pass btrfs_fs_info for deleting snapshots and cleaner 2022-03-14 13:13:52 +01:00
tree-checker.c btrfs: tree-checker: check for overlapping extent items 2022-08-17 16:20:25 +02:00
tree-checker.h btrfs: tree-checker: check extent buffer owner against owner rootid 2022-05-16 17:03:09 +02:00
tree-defrag.c btrfs: move the auto defrag code to defrag.c 2023-02-22 12:59:40 +01:00
tree-log.c btrfs: simplify update of last_dir_index_offset when logging a directory 2023-02-14 19:11:52 +01:00
tree-log.h btrfs: simplify update of last_dir_index_offset when logging a directory 2023-02-14 19:11:52 +01:00
tree-mod-log.c
tree-mod-log.h
ulist.c
ulist.h
uuid-tree.c
verity.c btrfs: send: add support for fs-verity 2022-09-26 12:27:55 +02:00
volumes.c btrfs: fix unnecessary increment of read error stat on write error 2023-03-17 08:50:14 +01:00
volumes.h btrfs: zoned: initialize device's zone info for seeding 2022-11-07 14:35:24 +01:00
xattr.c btrfs: check if root is readonly while setting security xattr 2022-08-22 18:06:30 +02:00
xattr.h
zlib.c btrfs: zlib: zero-initialize zlib workspace 2023-02-14 19:11:40 +01:00
zoned.c btrfs: zoned: enable metadata over-commit for non-ZNS setup 2023-02-01 08:34:34 +01:00
zoned.h btrfs: zoned: clone zoned device info when cloning a device 2022-11-07 14:35:21 +01:00
zstd.c btrfs: zstd: replace kmap() with kmap_local_page() 2022-07-25 17:45:40 +02:00