Commit f6011081 authored by Maxim Patlasov's avatar Maxim Patlasov Committed by Miklos Szeredi
Browse files

fuse: writepages: roll back changes if request not found



fuse_writepage_in_flight() returns false if it fails to find request with
given index in fi->writepages.  Then the caller proceeds with populating
data->orig_pages[] and incrementing req->num_pages.  Hence,
fuse_writepage_in_flight() must revert changes it made in request before
returning false.
Signed-off-by: default avatarMaxim Patlasov <MPatlasov@parallels.com>
Signed-off-by: default avatarMiklos Szeredi <mszeredi@suse.cz>
parent cb2ffb26
......@@ -1649,7 +1649,6 @@ static bool fuse_writepage_in_flight(struct fuse_req *new_req,
spin_lock(&fc->lock);
list_del(&new_req->writepages_entry);
new_req->num_pages = 1;
list_for_each_entry(old_req, &fi->writepages, writepages_entry) {
BUG_ON(old_req->inode != new_req->inode);
curr_index = old_req->misc.write.in.offset >> PAGE_CACHE_SHIFT;
......@@ -1659,9 +1658,12 @@ static bool fuse_writepage_in_flight(struct fuse_req *new_req,
break;
}
}
if (!found)
if (!found) {
list_add(&new_req->writepages_entry, &fi->writepages);
goto out_unlock;
}
new_req->num_pages = 1;
for (tmp = old_req; tmp != NULL; tmp = tmp->misc.write.next) {
BUG_ON(tmp->inode != new_req->inode);
curr_index = tmp->misc.write.in.offset >> PAGE_CACHE_SHIFT;
......
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