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fuse: update stats for pages in dropped aux writeback list

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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>
This commit is contained in:
Joanne Koong 2024-08-26 14:19:04 -07:00 committed by Miklos Szeredi
parent 76a51ac00c
commit f7790d6778
1 changed files with 7 additions and 1 deletions
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8
fs/fuse/file.c
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@ -1832,10 +1832,16 @@ __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);
}