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| author | \"J. Bruce Fields\ <bfields@citi.umich.edu> | 2008-12-23 22:10:19 +0100 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2008-12-23 22:10:19 +0100 |
| commit | cf81939d6fcdf381fcb069d780c29eceb516bccd (patch) | |
| tree | 1f55847a9c540d0f5ab7f42c1bd84fdb7d0cb38a /net | |
| parent | rpc: call release_pipe only on last close (diff) | |
| download | linux-cf81939d6fcdf381fcb069d780c29eceb516bccd.tar.xz linux-cf81939d6fcdf381fcb069d780c29eceb516bccd.zip | |
rpc: track number of users of the gss upcall pipe
Keep a count of the number of pipes open plus the number of messages on
a pipe. This count isn't used yet.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sunrpc/auth_gss/auth_gss.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c index bc512fff8a41..51aa27d32b5a 100644 --- a/net/sunrpc/auth_gss/auth_gss.c +++ b/net/sunrpc/auth_gss/auth_gss.c @@ -75,6 +75,8 @@ struct gss_auth { struct dentry *dentry; }; +static atomic_t pipe_users = ATOMIC_INIT(0); + static void gss_free_ctx(struct gss_cl_ctx *); static struct rpc_pipe_ops gss_upcall_ops; @@ -237,6 +239,7 @@ gss_release_msg(struct gss_upcall_msg *gss_msg) { if (!atomic_dec_and_test(&gss_msg->count)) return; + atomic_dec(&pipe_users); BUG_ON(!list_empty(&gss_msg->list)); if (gss_msg->ctx != NULL) gss_put_ctx(gss_msg->ctx); @@ -331,6 +334,7 @@ gss_alloc_msg(struct gss_auth *gss_auth, uid_t uid) gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); if (gss_msg == NULL) return ERR_PTR(-ENOMEM); + atomic_inc(&pipe_users); INIT_LIST_HEAD(&gss_msg->list); rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); init_waitqueue_head(&gss_msg->waitqueue); @@ -555,6 +559,13 @@ out: return err; } +static int +gss_pipe_open(struct inode *inode) +{ + atomic_inc(&pipe_users); + return 0; +} + static void gss_pipe_release(struct inode *inode) { @@ -574,6 +585,8 @@ gss_pipe_release(struct inode *inode) spin_lock(&inode->i_lock); } spin_unlock(&inode->i_lock); + + atomic_dec(&pipe_users); } static void @@ -1349,6 +1362,7 @@ static struct rpc_pipe_ops gss_upcall_ops = { .upcall = gss_pipe_upcall, .downcall = gss_pipe_downcall, .destroy_msg = gss_pipe_destroy_msg, + .open_pipe = gss_pipe_open, .release_pipe = gss_pipe_release, }; |