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fuse: writepages: protect secondary requests from fuse file release

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All async fuse requests must be supplied with extra reference to a fuse
file.  This is necessary to ensure that the fuse file is not released until
all in-flight requests are completed.  Fuse secondary writeback requests
must obey this rule as well.

Signed-off-by: Maxim Patlasov <MPatlasov@parallels.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
This commit is contained in:
Maxim Patlasov 2013-10-02 21:38:54 +04:00 committed by Miklos Szeredi
parent 41b6e41fc6
commit ce128de626
1 changed files with 1 additions and 0 deletions
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fs/fuse/file.c
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@ -1505,6 +1505,7 @@ static void fuse_writepage_end(struct fuse_conn *fc, struct fuse_req *req)
struct fuse_req *next = req->misc.write.next;
req->misc.write.next = next->misc.write.next;
next->misc.write.next = NULL;
next->ff = fuse_file_get(req->ff);
list_add(&next->writepages_entry, &fi->writepages);
/*