diff options
| author | Maxim Patlasov <mpatlasov@parallels.com> | 2013-03-21 18:02:15 +0400 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@suse.cz> | 2013-04-17 14:31:44 +0400 |
| commit | 796523fb24028639c007f71e02ca21730f7c0af6 (patch) | |
| tree | c898b0bd8933078bdb16bd1c35a4a1cd7d074a06 | |
| parent | 8b41e6715ed555e2d8e8dac52ec1f05a9f04dcb4 (diff) | |
| download | linux-796523fb24028639c007f71e02ca21730f7c0af6.tar.xz | |
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>
| -rw-r--r-- | fs/fuse/cuse.c | 1 | ||||
| -rw-r--r-- | fs/fuse/dev.c | 1 | ||||
| -rw-r--r-- | fs/fuse/fuse_i.h | 4 | ||||
| -rw-r--r-- | fs/fuse/inode.c | 3 |
4 files changed, 9 insertions, 0 deletions
diff --git a/fs/fuse/cuse.c b/fs/fuse/cuse.c index b7c7f3060635..f563e78852b7 100644 --- a/fs/fuse/cuse.c +++ b/fs/fuse/cuse.c @@ -505,6 +505,7 @@ static int cuse_channel_open(struct inode *inode, struct file *file) 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 3b8301f5c0e1..39c2fe3ba93d 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -2087,6 +2087,7 @@ void fuse_abort_conn(struct fuse_conn *fc) 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 47c94d28ff88..6bf30f2af901 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -417,6 +417,10 @@ struct fuse_conn { /** 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 e26607df93df..4958f8099f16 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -363,6 +363,7 @@ void fuse_conn_kill(struct fuse_conn *fc) 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 @@ void fuse_conn_init(struct fuse_conn *fc) 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 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req) fc->conn_init = 1; } fc->blocked = 0; + fc->initialized = 1; wake_up_all(&fc->blocked_waitq); } |