OpenCloudOS-Kernel/fs/gfs2
Bob Peterson 0be8432166 gfs2: Don't use filemap_splice_read
Starting with patch 2cb1e08985, gfs2 started using the new function
filemap_splice_read rather than the old (and subsequently deleted)
function generic_file_splice_read.

filemap_splice_read works by taking references to a number of folios in
the page cache and splicing those folios into a pipe.  The folios are
then read from the pipe and the folio references are dropped.  This can
take an arbitrary amount of time.  We cannot allow that in gfs2 because
those folio references will pin the inode glock to the node and prevent
it from being demoted, which can lead to cluster-wide deadlocks.

Instead, use copy_splice_read.

(In addition, the old generic_file_splice_read called into ->read_iter,
which called gfs2_file_read_iter, which took the inode glock during the
operation.  The new filemap_splice_read interface does not take the
inode glock anymore.  This is fixable, but it still wouldn't prevent
cluster-wide deadlocks.)

Fixes: 2cb1e08985 ("splice: Use filemap_splice_read() instead of generic_file_splice_read()")
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
2023-08-07 18:42:04 +02:00
..
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
acl.c fs: port acl to mnt_idmap 2023-01-19 09:24:28 +01:00
acl.h fs: port ->set_acl() to pass mnt_idmap 2023-01-19 09:24:27 +01:00
aops.c gfs2 fixes 2023-07-04 11:45:16 -07:00
aops.h gfs2: support ludicrously large folios in gfs2_trans_add_databufs() 2023-06-19 16:19:30 -07:00
bmap.c gfs2: fix minor comment typos 2023-06-06 18:35:06 +02:00
bmap.h gfs2: Eliminate gfs2_trim_blocks 2023-04-18 14:40:12 +02:00
dentry.c Reinstate "GFS2: free disk inode which is deleted by remote node -V2" 2023-03-23 19:37:56 +01:00
dir.c gfs2 fixes 2022-08-06 14:44:49 -07:00
dir.h gfs2: Delete an unnecessary check before brelse() 2019-09-04 20:22:17 +02:00
export.c Change calling conventions for filldir_t 2022-08-17 17:25:04 -04:00
file.c gfs2: Don't use filemap_splice_read 2023-08-07 18:42:04 +02:00
gfs2.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 398 2019-06-05 17:37:12 +02:00
glock.c gfs2: Rename remaining "transaction" glock references 2023-06-15 09:57:38 +02:00
glock.h gfs2: Split the two kinds of glock "delete" work 2023-01-31 22:40:24 +01:00
glops.c gfs: Get rid of unnucessary locking in inode_go_dump 2023-07-03 22:30:47 +02:00
glops.h gfs2: Split up gfs2_meta_sync into inode and rgrp versions 2020-10-29 22:16:46 +01:00
incore.h gfs: Get rid of unnucessary locking in inode_go_dump 2023-07-03 22:30:47 +02:00
inode.c gfs2: Remove ghs[] from gfs2_unlink 2023-03-27 14:42:16 +02:00
inode.h fs: port ->permission() to pass mnt_idmap 2023-01-19 09:24:28 +01:00
lock_dlm.c gfs2: simplify gdlm_put_lock with out_free label 2023-06-06 18:35:06 +02:00
log.c gfs2: Replace sd_freeze_state with SDF_FROZEN flag 2023-07-03 22:30:23 +02:00
log.h fs/gfs2: Use the enum req_op and blk_opf_t types 2022-07-14 12:14:32 -06:00
lops.c gfs2: Use memcpy_{from,to}_page where appropriate 2023-07-03 22:30:48 +02:00
lops.h fs/gfs2: Use the enum req_op and blk_opf_t types 2022-07-14 12:14:32 -06:00
main.c gfs2: Register fs after creating workqueues 2022-09-20 17:53:54 +02:00
meta_io.c gfs2: replace obvious uses of b_page with b_folio 2023-01-18 17:12:40 -08:00
meta_io.h gfs2: Use container_of() for gfs2_glock(aspace) 2022-05-24 21:29:14 +02:00
ops_fstype.c gfs2 fixes 2023-07-04 11:45:16 -07:00
quota.c gfs2: Add quota_change type 2023-07-03 22:30:48 +02:00
quota.h gfs2: move privileged user check to gfs2_quota_lock_check 2020-05-08 18:47:58 +02:00
recovery.c gfs2: Replace sd_freeze_state with SDF_FROZEN flag 2023-07-03 22:30:23 +02:00
recovery.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 398 2019-06-05 17:37:12 +02:00
rgrp.c gfs2: Update rl_unlinked before releasing rgrp lock 2023-06-06 18:35:06 +02:00
rgrp.h Merge part of branch 'for-next.instantiate' into for-next 2022-08-05 18:37:03 +02:00
super.c gfs2: gfs2_freeze_lock_shared cleanup 2023-07-03 22:30:26 +02:00
super.h gfs2: Rework freeze / thaw logic 2023-07-03 22:25:02 +02:00
sys.c gfs2: Replace sd_freeze_state with SDF_FROZEN flag 2023-07-03 22:30:23 +02:00
sys.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 398 2019-06-05 17:37:12 +02:00
trace_gfs2.h gfs2: Remove 'first' trace_gfs2_promote argument 2021-10-25 08:42:19 +02:00
trans.c gfs2: Fix freeze consistency check in gfs2_trans_add_meta 2023-08-07 18:40:51 +02:00
trans.h Merge branches 'rgrp-glock-sharing' and 'gfs2-revoke' from https://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git 2021-02-23 18:54:22 +01:00
util.c gfs2: Add quota_change type 2023-07-03 22:30:48 +02:00
util.h gfs2: gfs2_freeze_lock_shared cleanup 2023-07-03 22:30:26 +02:00
xattr.c fs: drop unused posix acl handlers 2023-03-06 09:57:12 +01:00
xattr.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 398 2019-06-05 17:37:12 +02:00