/include/linux/sunrpc/svc_xprt.h

https://bitbucket.org/thekraven/iscream_thunderc-2.6.35 · C++ Header · 169 lines · 143 code · 19 blank · 7 comment · 3 complexity · c9ecbadd035b1608ac3cfb72bf712e39 MD5 · raw file

  1. /*
  2. * linux/include/linux/sunrpc/svc_xprt.h
  3. *
  4. * RPC server transport I/O
  5. */
  6. #ifndef SUNRPC_SVC_XPRT_H
  7. #define SUNRPC_SVC_XPRT_H
  8. #include <linux/sunrpc/svc.h>
  9. #include <linux/module.h>
  10. struct svc_xprt_ops {
  11. struct svc_xprt *(*xpo_create)(struct svc_serv *,
  12. struct sockaddr *, int,
  13. int);
  14. struct svc_xprt *(*xpo_accept)(struct svc_xprt *);
  15. int (*xpo_has_wspace)(struct svc_xprt *);
  16. int (*xpo_recvfrom)(struct svc_rqst *);
  17. void (*xpo_prep_reply_hdr)(struct svc_rqst *);
  18. int (*xpo_sendto)(struct svc_rqst *);
  19. void (*xpo_release_rqst)(struct svc_rqst *);
  20. void (*xpo_detach)(struct svc_xprt *);
  21. void (*xpo_free)(struct svc_xprt *);
  22. };
  23. struct svc_xprt_class {
  24. const char *xcl_name;
  25. struct module *xcl_owner;
  26. struct svc_xprt_ops *xcl_ops;
  27. struct list_head xcl_list;
  28. u32 xcl_max_payload;
  29. };
  30. struct svc_xprt {
  31. struct svc_xprt_class *xpt_class;
  32. struct svc_xprt_ops *xpt_ops;
  33. struct kref xpt_ref;
  34. struct list_head xpt_list;
  35. struct list_head xpt_ready;
  36. unsigned long xpt_flags;
  37. #define XPT_BUSY 0 /* enqueued/receiving */
  38. #define XPT_CONN 1 /* conn pending */
  39. #define XPT_CLOSE 2 /* dead or dying */
  40. #define XPT_DATA 3 /* data pending */
  41. #define XPT_TEMP 4 /* connected transport */
  42. #define XPT_DEAD 6 /* transport closed */
  43. #define XPT_CHNGBUF 7 /* need to change snd/rcv buf sizes */
  44. #define XPT_DEFERRED 8 /* deferred request pending */
  45. #define XPT_OLD 9 /* used for xprt aging mark+sweep */
  46. #define XPT_DETACHED 10 /* detached from tempsocks list */
  47. #define XPT_LISTENER 11 /* listening endpoint */
  48. #define XPT_CACHE_AUTH 12 /* cache auth info */
  49. struct svc_pool *xpt_pool; /* current pool iff queued */
  50. struct svc_serv *xpt_server; /* service for transport */
  51. atomic_t xpt_reserved; /* space on outq that is rsvd */
  52. struct mutex xpt_mutex; /* to serialize sending data */
  53. spinlock_t xpt_lock; /* protects sk_deferred
  54. * and xpt_auth_cache */
  55. void *xpt_auth_cache;/* auth cache */
  56. struct list_head xpt_deferred; /* deferred requests that need
  57. * to be revisted */
  58. struct sockaddr_storage xpt_local; /* local address */
  59. size_t xpt_locallen; /* length of address */
  60. struct sockaddr_storage xpt_remote; /* remote peer's address */
  61. size_t xpt_remotelen; /* length of address */
  62. struct rpc_wait_queue xpt_bc_pending; /* backchannel wait queue */
  63. };
  64. int svc_reg_xprt_class(struct svc_xprt_class *);
  65. void svc_unreg_xprt_class(struct svc_xprt_class *);
  66. void svc_xprt_init(struct svc_xprt_class *, struct svc_xprt *,
  67. struct svc_serv *);
  68. int svc_create_xprt(struct svc_serv *, const char *, const int,
  69. const unsigned short, int);
  70. void svc_xprt_enqueue(struct svc_xprt *xprt);
  71. void svc_xprt_received(struct svc_xprt *);
  72. void svc_xprt_put(struct svc_xprt *xprt);
  73. void svc_xprt_copy_addrs(struct svc_rqst *rqstp, struct svc_xprt *xprt);
  74. void svc_close_xprt(struct svc_xprt *xprt);
  75. void svc_delete_xprt(struct svc_xprt *xprt);
  76. int svc_port_is_privileged(struct sockaddr *sin);
  77. int svc_print_xprts(char *buf, int maxlen);
  78. struct svc_xprt *svc_find_xprt(struct svc_serv *serv, const char *xcl_name,
  79. const sa_family_t af, const unsigned short port);
  80. int svc_xprt_names(struct svc_serv *serv, char *buf, const int buflen);
  81. static inline void svc_xprt_get(struct svc_xprt *xprt)
  82. {
  83. kref_get(&xprt->xpt_ref);
  84. }
  85. static inline void svc_xprt_set_local(struct svc_xprt *xprt,
  86. const struct sockaddr *sa,
  87. const size_t salen)
  88. {
  89. memcpy(&xprt->xpt_local, sa, salen);
  90. xprt->xpt_locallen = salen;
  91. }
  92. static inline void svc_xprt_set_remote(struct svc_xprt *xprt,
  93. const struct sockaddr *sa,
  94. const size_t salen)
  95. {
  96. memcpy(&xprt->xpt_remote, sa, salen);
  97. xprt->xpt_remotelen = salen;
  98. }
  99. static inline unsigned short svc_addr_port(const struct sockaddr *sa)
  100. {
  101. const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
  102. const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
  103. switch (sa->sa_family) {
  104. case AF_INET:
  105. return ntohs(sin->sin_port);
  106. case AF_INET6:
  107. return ntohs(sin6->sin6_port);
  108. }
  109. return 0;
  110. }
  111. static inline size_t svc_addr_len(const struct sockaddr *sa)
  112. {
  113. switch (sa->sa_family) {
  114. case AF_INET:
  115. return sizeof(struct sockaddr_in);
  116. case AF_INET6:
  117. return sizeof(struct sockaddr_in6);
  118. }
  119. return 0;
  120. }
  121. static inline unsigned short svc_xprt_local_port(const struct svc_xprt *xprt)
  122. {
  123. return svc_addr_port((const struct sockaddr *)&xprt->xpt_local);
  124. }
  125. static inline unsigned short svc_xprt_remote_port(const struct svc_xprt *xprt)
  126. {
  127. return svc_addr_port((const struct sockaddr *)&xprt->xpt_remote);
  128. }
  129. static inline char *__svc_print_addr(const struct sockaddr *addr,
  130. char *buf, const size_t len)
  131. {
  132. const struct sockaddr_in *sin = (const struct sockaddr_in *)addr;
  133. const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)addr;
  134. switch (addr->sa_family) {
  135. case AF_INET:
  136. snprintf(buf, len, "%pI4, port=%u", &sin->sin_addr,
  137. ntohs(sin->sin_port));
  138. break;
  139. case AF_INET6:
  140. snprintf(buf, len, "%pI6, port=%u",
  141. &sin6->sin6_addr,
  142. ntohs(sin6->sin6_port));
  143. break;
  144. default:
  145. snprintf(buf, len, "unknown address type: %d", addr->sa_family);
  146. break;
  147. }
  148. return buf;
  149. }
  150. #endif /* SUNRPC_SVC_XPRT_H */