Use correct lock to protect the kill_requests operation on all request
queues. Test of the FUSE_S_FAIL_IMMEDIATELY bit needs to be done with
corresponding lock to prevent new requests being added to a queue after
it has been killed.
Adjust the order of queues that kill_request operation is performed as
following:
bg_queue -> [ kio queues ] -> input queue -> process queue.
This follows the order that a fuse request could be moved around among
queues. The most import part is that the bg_queue needs to be killed
first because otherwise requests from it could be flushed to input queue
after the input queue has been killed.
Signed-off-by: Liu Kui <kui....@acronis.com>
Acked-by: Alexey Kuznetsov <kuz...@acronis.com>
---
fs/fuse/inode.c | 33 +++++++++++++++++++++++----------
1 file changed, 23 insertions(+), 10 deletions(-)
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 91b5591..c377700 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -512,15 +512,14 @@ int fuse_invalidate_files(struct fuse_conn *fc, u64
nodeid)
fi = get_fuse_inode(inode);
+ /* Mark that invalidate files is in progress */
spin_lock(&fi->lock);
+ set_bit(FUSE_I_INVAL_FILES, &fi->state);
list_for_each_entry(ff, &fi->rw_files, rw_entry) {
set_bit(FUSE_S_FAIL_IMMEDIATELY, &ff->ff_state);
}
spin_unlock(&fi->lock);
- /* Mark that invalidate files is in progress */
- set_bit(FUSE_I_INVAL_FILES, &fi->state);
-
/* let them see FUSE_S_FAIL_IMMEDIATELY */
wake_up_all(&fc->blocked_waitq);
@@ -528,24 +527,38 @@ int fuse_invalidate_files(struct fuse_conn *fc, u64
nodeid)
if (!err || err == -EIO) { /* AS_EIO might trigger -EIO */
struct fuse_dev *fud;
spin_lock(&fc->lock);
+
+ /*
+ * Clean bg_queue first to prevent requests being flushed
+ * to an input queue after it has been cleaned .
+ */
+ spin_lock(&fc->bg_lock);
+ fuse_kill_requests(fc, inode, &fc->bg_queue);
+ spin_unlock(&fc->bg_lock);
+
+ if (fc->kio.op && fc->kio.op->kill_requests)
+ fc->kio.op->kill_requests(fc, inode);
+
+ spin_lock(&fc->main_iq.lock);
+ fuse_kill_requests(fc, inode, &fc->main_iq.pending);
+ spin_unlock(&fc->main_iq.lock);
+
list_for_each_entry(fud, &fc->devices, entry) {
struct fuse_pqueue *fpq = &fud->pq;
struct fuse_iqueue *fiq = fud->fiq;
int i;
+
+ spin_lock(&fiq->lock);
+ fuse_kill_requests(fc, inode, &fiq->pending);
+ spin_unlock(&fiq->lock);
+
spin_lock(&fpq->lock);
for (i = 0; i < FUSE_PQ_HASH_SIZE; i++)
fuse_kill_requests(fc, inode,
&fpq->processing[i]);
fuse_kill_requests(fc, inode, &fpq->io);
spin_unlock(&fpq->lock);
- spin_lock(&fiq->waitq.lock);
- fuse_kill_requests(fc, inode, &fiq->pending);
- spin_unlock(&fiq->waitq.lock);
}
- fuse_kill_requests(fc, inode, &fc->main_iq.pending);
- fuse_kill_requests(fc, inode, &fc->bg_queue);
- if (fc->kio.op && fc->kio.op->kill_requests)
- fc->kio.op->kill_requests(fc, inode);
wake_up(&fi->page_waitq); /* readpage[s] can wait on fuse wb */
spin_unlock(&fc->lock);
--
1.8.3.1
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