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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/include/linux/sunrpc/svc_xprt.h
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/include/linux/sunrpc/svc_xprt.h')
-rw-r--r--kernel/include/linux/sunrpc/svc_xprt.h210
1 files changed, 210 insertions, 0 deletions
diff --git a/kernel/include/linux/sunrpc/svc_xprt.h b/kernel/include/linux/sunrpc/svc_xprt.h
new file mode 100644
index 000000000..79f6f8f3d
--- /dev/null
+++ b/kernel/include/linux/sunrpc/svc_xprt.h
@@ -0,0 +1,210 @@
+/*
+ * linux/include/linux/sunrpc/svc_xprt.h
+ *
+ * RPC server transport I/O
+ */
+
+#ifndef SUNRPC_SVC_XPRT_H
+#define SUNRPC_SVC_XPRT_H
+
+#include <linux/sunrpc/svc.h>
+
+struct module;
+
+struct svc_xprt_ops {
+ struct svc_xprt *(*xpo_create)(struct svc_serv *,
+ struct net *net,
+ struct sockaddr *, int,
+ int);
+ struct svc_xprt *(*xpo_accept)(struct svc_xprt *);
+ int (*xpo_has_wspace)(struct svc_xprt *);
+ int (*xpo_recvfrom)(struct svc_rqst *);
+ void (*xpo_prep_reply_hdr)(struct svc_rqst *);
+ int (*xpo_sendto)(struct svc_rqst *);
+ void (*xpo_release_rqst)(struct svc_rqst *);
+ void (*xpo_detach)(struct svc_xprt *);
+ void (*xpo_free)(struct svc_xprt *);
+ int (*xpo_secure_port)(struct svc_rqst *);
+ void (*xpo_adjust_wspace)(struct svc_xprt *);
+};
+
+struct svc_xprt_class {
+ const char *xcl_name;
+ struct module *xcl_owner;
+ struct svc_xprt_ops *xcl_ops;
+ struct list_head xcl_list;
+ u32 xcl_max_payload;
+ int xcl_ident;
+};
+
+/*
+ * This is embedded in an object that wants a callback before deleting
+ * an xprt; intended for use by NFSv4.1, which needs to know when a
+ * client's tcp connection (and hence possibly a backchannel) goes away.
+ */
+struct svc_xpt_user {
+ struct list_head list;
+ void (*callback)(struct svc_xpt_user *);
+};
+
+struct svc_xprt {
+ struct svc_xprt_class *xpt_class;
+ struct svc_xprt_ops *xpt_ops;
+ struct kref xpt_ref;
+ struct list_head xpt_list;
+ struct list_head xpt_ready;
+ unsigned long xpt_flags;
+#define XPT_BUSY 0 /* enqueued/receiving */
+#define XPT_CONN 1 /* conn pending */
+#define XPT_CLOSE 2 /* dead or dying */
+#define XPT_DATA 3 /* data pending */
+#define XPT_TEMP 4 /* connected transport */
+#define XPT_DEAD 6 /* transport closed */
+#define XPT_CHNGBUF 7 /* need to change snd/rcv buf sizes */
+#define XPT_DEFERRED 8 /* deferred request pending */
+#define XPT_OLD 9 /* used for xprt aging mark+sweep */
+#define XPT_LISTENER 10 /* listening endpoint */
+#define XPT_CACHE_AUTH 11 /* cache auth info */
+#define XPT_LOCAL 12 /* connection from loopback interface */
+
+ struct svc_serv *xpt_server; /* service for transport */
+ atomic_t xpt_reserved; /* space on outq that is rsvd */
+ struct mutex xpt_mutex; /* to serialize sending data */
+ spinlock_t xpt_lock; /* protects sk_deferred
+ * and xpt_auth_cache */
+ void *xpt_auth_cache;/* auth cache */
+ struct list_head xpt_deferred; /* deferred requests that need
+ * to be revisted */
+ struct sockaddr_storage xpt_local; /* local address */
+ size_t xpt_locallen; /* length of address */
+ struct sockaddr_storage xpt_remote; /* remote peer's address */
+ size_t xpt_remotelen; /* length of address */
+ struct rpc_wait_queue xpt_bc_pending; /* backchannel wait queue */
+ struct list_head xpt_users; /* callbacks on free */
+
+ struct net *xpt_net;
+ struct rpc_xprt *xpt_bc_xprt; /* NFSv4.1 backchannel */
+};
+
+static inline void unregister_xpt_user(struct svc_xprt *xpt, struct svc_xpt_user *u)
+{
+ spin_lock(&xpt->xpt_lock);
+ list_del_init(&u->list);
+ spin_unlock(&xpt->xpt_lock);
+}
+
+static inline int register_xpt_user(struct svc_xprt *xpt, struct svc_xpt_user *u)
+{
+ spin_lock(&xpt->xpt_lock);
+ if (test_bit(XPT_CLOSE, &xpt->xpt_flags)) {
+ /*
+ * The connection is about to be deleted soon (or,
+ * worse, may already be deleted--in which case we've
+ * already notified the xpt_users).
+ */
+ spin_unlock(&xpt->xpt_lock);
+ return -ENOTCONN;
+ }
+ list_add(&u->list, &xpt->xpt_users);
+ spin_unlock(&xpt->xpt_lock);
+ return 0;
+}
+
+int svc_reg_xprt_class(struct svc_xprt_class *);
+void svc_unreg_xprt_class(struct svc_xprt_class *);
+void svc_xprt_init(struct net *, struct svc_xprt_class *, struct svc_xprt *,
+ struct svc_serv *);
+int svc_create_xprt(struct svc_serv *, const char *, struct net *,
+ const int, const unsigned short, int);
+void svc_xprt_enqueue(struct svc_xprt *xprt);
+void svc_xprt_put(struct svc_xprt *xprt);
+void svc_xprt_copy_addrs(struct svc_rqst *rqstp, struct svc_xprt *xprt);
+void svc_close_xprt(struct svc_xprt *xprt);
+int svc_port_is_privileged(struct sockaddr *sin);
+int svc_print_xprts(char *buf, int maxlen);
+struct svc_xprt *svc_find_xprt(struct svc_serv *serv, const char *xcl_name,
+ struct net *net, const sa_family_t af,
+ const unsigned short port);
+int svc_xprt_names(struct svc_serv *serv, char *buf, const int buflen);
+void svc_add_new_perm_xprt(struct svc_serv *serv, struct svc_xprt *xprt);
+
+static inline void svc_xprt_get(struct svc_xprt *xprt)
+{
+ kref_get(&xprt->xpt_ref);
+}
+static inline void svc_xprt_set_local(struct svc_xprt *xprt,
+ const struct sockaddr *sa,
+ const size_t salen)
+{
+ memcpy(&xprt->xpt_local, sa, salen);
+ xprt->xpt_locallen = salen;
+}
+static inline void svc_xprt_set_remote(struct svc_xprt *xprt,
+ const struct sockaddr *sa,
+ const size_t salen)
+{
+ memcpy(&xprt->xpt_remote, sa, salen);
+ xprt->xpt_remotelen = salen;
+}
+static inline unsigned short svc_addr_port(const struct sockaddr *sa)
+{
+ const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
+ const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
+
+ switch (sa->sa_family) {
+ case AF_INET:
+ return ntohs(sin->sin_port);
+ case AF_INET6:
+ return ntohs(sin6->sin6_port);
+ }
+
+ return 0;
+}
+
+static inline size_t svc_addr_len(const struct sockaddr *sa)
+{
+ switch (sa->sa_family) {
+ case AF_INET:
+ return sizeof(struct sockaddr_in);
+ case AF_INET6:
+ return sizeof(struct sockaddr_in6);
+ }
+ BUG();
+}
+
+static inline unsigned short svc_xprt_local_port(const struct svc_xprt *xprt)
+{
+ return svc_addr_port((const struct sockaddr *)&xprt->xpt_local);
+}
+
+static inline unsigned short svc_xprt_remote_port(const struct svc_xprt *xprt)
+{
+ return svc_addr_port((const struct sockaddr *)&xprt->xpt_remote);
+}
+
+static inline char *__svc_print_addr(const struct sockaddr *addr,
+ char *buf, const size_t len)
+{
+ const struct sockaddr_in *sin = (const struct sockaddr_in *)addr;
+ const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)addr;
+
+ switch (addr->sa_family) {
+ case AF_INET:
+ snprintf(buf, len, "%pI4, port=%u", &sin->sin_addr,
+ ntohs(sin->sin_port));
+ break;
+
+ case AF_INET6:
+ snprintf(buf, len, "%pI6, port=%u",
+ &sin6->sin6_addr,
+ ntohs(sin6->sin6_port));
+ break;
+
+ default:
+ snprintf(buf, len, "unknown address type: %d", addr->sa_family);
+ break;
+ }
+
+ return buf;
+}
+#endif /* SUNRPC_SVC_XPRT_H */