fuse: add flag fc->initialized
Existing flag fc->blocked is used to suspend request allocation both in case
of many background request submitted and period of time before init_reply
arrives from userspace. Next patch will skip blocking allocations of
synchronous request (disregarding fc->blocked). This is mostly OK, but
we still need to suspend allocations if init_reply is not arrived yet. The
patch introduces flag fc->initialized which will serve this purpose.
Signed-off-by: Maxim Patlasov <mpatlasov@parallels.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
diff --git a/fs/fuse/cuse.c b/fs/fuse/cuse.c
index b7c7f30..f563e78 100644
--- a/fs/fuse/cuse.c
+++ b/fs/fuse/cuse.c
@@ -505,6 +505,7 @@
cc->fc.connected = 1;
cc->fc.blocked = 0;
+ cc->fc.initialized = 1;
rc = cuse_send_init(cc);
if (rc) {
fuse_conn_put(&cc->fc);
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 3b8301f..39c2fe3 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -2087,6 +2087,7 @@
if (fc->connected) {
fc->connected = 0;
fc->blocked = 0;
+ fc->initialized = 1;
end_io_requests(fc);
end_queued_requests(fc);
end_polls(fc);
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 47c94d2..6bf30f2 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -417,6 +417,10 @@
/** Batching of FORGET requests (positive indicates FORGET batch) */
int forget_batch;
+ /** Flag indicating that INIT reply has been received. Allocating
+ * any fuse request will be suspended until the flag is set */
+ int initialized;
+
/** Flag indicating if connection is blocked. This will be
the case before the INIT reply is received, and if there
are too many outstading backgrounds requests */
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index e26607d..4958f80 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -363,6 +363,7 @@
spin_lock(&fc->lock);
fc->connected = 0;
fc->blocked = 0;
+ fc->initialized = 1;
spin_unlock(&fc->lock);
/* Flush all readers on this fs */
kill_fasync(&fc->fasync, SIGIO, POLL_IN);
@@ -583,6 +584,7 @@
fc->polled_files = RB_ROOT;
fc->reqctr = 0;
fc->blocked = 1;
+ fc->initialized = 0;
fc->attr_version = 1;
get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key));
}
@@ -882,6 +884,7 @@
fc->conn_init = 1;
}
fc->blocked = 0;
+ fc->initialized = 1;
wake_up_all(&fc->blocked_waitq);
}