From 296abc0d91d8b65d42224dd33452ace14491ad08 Mon Sep 17 00:00:00 2001 From: Andreas Gruenbacher <agruenba@redhat.com> Date: Thu, 28 Apr 2022 14:51:33 +0200 Subject: gfs2: No short reads or writes upon glock contention Commit 00bfe02f4796 ("gfs2: Fix mmap + page fault deadlocks for buffered I/O") changed gfs2_file_read_iter() and gfs2_file_buffered_write() to allow dropping the inode glock while faulting in user buffers. When the lock was dropped, a short result was returned to indicate that the operation was interrupted. As pointed out by Linus (see the link below), this behavior is broken and the operations should always re-acquire the inode glock and resume the operation instead. Link: https://lore.kernel.org/lkml/CAHk-=whaz-g_nOOoo8RRiWNjnv2R+h6_xk2F1J4TuSRxk1MtLw@mail.gmail.com/ Fixes: 00bfe02f4796 ("gfs2: Fix mmap + page fault deadlocks for buffered I/O") Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> --- fs/gfs2/file.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'fs') diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index 8d889235afcd..48f01323c37c 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -991,8 +991,6 @@ retry_under_glock: if (leftover != window_size) { if (gfs2_holder_queued(&gh)) goto retry_under_glock; - if (written) - goto out_uninit; goto retry; } } @@ -1069,8 +1067,6 @@ retry_under_glock: from->count = min(from->count, window_size - leftover); if (gfs2_holder_queued(gh)) goto retry_under_glock; - if (read && !(iocb->ki_flags & IOCB_DIRECT)) - goto out_uninit; goto retry; } } -- cgit v1.2.3