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fuse: update stats for pages in dropped aux writeback list

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BugLink: https://bugs.launchpad.net/bugs/2085849

commit f7790d67785302b3116bbbfda62a5a44524601a3 upstream.

In the case where the aux writeback list is dropped (e.g. the pages
have been truncated or the connection is broken), the stats for
its pages and backing device info need to be updated as well.

Fixes: e2653bd53a ("fuse: fix leaked aux requests")
Signed-off-by: Joanne Koong <joannelkoong@gmail.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Cc: <stable@vger.kernel.org> # v5.1
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>
This commit is contained in:
Joanne Koong
2024-08-26 14:19:04 -07:00
committed by Mehmet Basaran
parent f8ff94122e
commit 38d54e5c3f
1 changed files with 7 additions and 1 deletions
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fs/fuse/file.c
+7 -1
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@@ -1736,10 +1736,16 @@ __acquires(fi->lock)
fuse_writepage_finish(fm, wpa);
spin_unlock(&fi->lock);
/* After fuse_writepage_finish() aux request list is private */
/* After rb_erase() aux request list is private */
for (aux = wpa->next; aux; aux = next) {
struct backing_dev_info *bdi = inode_to_bdi(aux->inode);
next = aux->next;
aux->next = NULL;
dec_wb_stat(&bdi->wb, WB_WRITEBACK);
dec_node_page_state(aux->ia.ap.pages[0], NR_WRITEBACK_TEMP);
wb_writeout_inc(&bdi->wb);
fuse_writepage_free(aux);
}