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| author | Mathias Krause <minipli@googlemail.com> | 2013-02-23 01:13:48 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-02-23 13:51:54 -0500 |
| commit | 8e904550d0fffcda2b18d7ab12750b0c75757e89 (patch) | |
| tree | be10511f81dc57b40a3d747940082431fece50b6 /net/core | |
| parent | 6e601a53566d84e1ffd25e7b6fe0b6894ffd79c0 (diff) | |
| download | lwn-8e904550d0fffcda2b18d7ab12750b0c75757e89.tar.gz lwn-8e904550d0fffcda2b18d7ab12750b0c75757e89.zip | |
sock_diag: Simplify sock_diag_handlers[] handling in __sock_diag_rcv_msg
The sock_diag_lock_handler() and sock_diag_unlock_handler() actually
make the code less readable. Get rid of them and make the lock usage
and access to sock_diag_handlers[] clear on the first sight.
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/sock_diag.c | 24 |
1 files changed, 7 insertions, 17 deletions
diff --git a/net/core/sock_diag.c b/net/core/sock_diag.c index 750f44f3aa31..a29e90cf36b7 100644 --- a/net/core/sock_diag.c +++ b/net/core/sock_diag.c @@ -97,21 +97,6 @@ void sock_diag_unregister(const struct sock_diag_handler *hnld) } EXPORT_SYMBOL_GPL(sock_diag_unregister); -static const inline struct sock_diag_handler *sock_diag_lock_handler(int family) -{ - if (sock_diag_handlers[family] == NULL) - request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK, - NETLINK_SOCK_DIAG, family); - - mutex_lock(&sock_diag_table_mutex); - return sock_diag_handlers[family]; -} - -static inline void sock_diag_unlock_handler(const struct sock_diag_handler *h) -{ - mutex_unlock(&sock_diag_table_mutex); -} - static int __sock_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) { int err; @@ -124,12 +109,17 @@ static int __sock_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) if (req->sdiag_family >= AF_MAX) return -EINVAL; - hndl = sock_diag_lock_handler(req->sdiag_family); + if (sock_diag_handlers[req->sdiag_family] == NULL) + request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK, + NETLINK_SOCK_DIAG, req->sdiag_family); + + mutex_lock(&sock_diag_table_mutex); + hndl = sock_diag_handlers[req->sdiag_family]; if (hndl == NULL) err = -ENOENT; else err = hndl->dump(skb, nlh); - sock_diag_unlock_handler(hndl); + mutex_unlock(&sock_diag_table_mutex); return err; } |