Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1 | #include <linux/ceph/ceph_debug.h> |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2 | |
| 3 | #include <linux/crc32c.h> |
| 4 | #include <linux/ctype.h> |
| 5 | #include <linux/highmem.h> |
| 6 | #include <linux/inet.h> |
| 7 | #include <linux/kthread.h> |
| 8 | #include <linux/net.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 9 | #include <linux/slab.h> |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 10 | #include <linux/socket.h> |
| 11 | #include <linux/string.h> |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 12 | #include <linux/bio.h> |
| 13 | #include <linux/blkdev.h> |
Noah Watkins | ee3b56f | 2011-09-23 11:48:42 -0700 | [diff] [blame] | 14 | #include <linux/dns_resolver.h> |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 15 | #include <net/tcp.h> |
| 16 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 17 | #include <linux/ceph/libceph.h> |
| 18 | #include <linux/ceph/messenger.h> |
| 19 | #include <linux/ceph/decode.h> |
| 20 | #include <linux/ceph/pagelist.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 21 | #include <linux/export.h> |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 22 | |
| 23 | /* |
| 24 | * Ceph uses the messenger to exchange ceph_msg messages with other |
| 25 | * hosts in the system. The messenger provides ordered and reliable |
| 26 | * delivery. We tolerate TCP disconnects by reconnecting (with |
| 27 | * exponential backoff) in the case of a fault (disconnection, bad |
| 28 | * crc, protocol error). Acks allow sent messages to be discarded by |
| 29 | * the sender. |
| 30 | */ |
| 31 | |
Alex Elder | bc18f4b | 2012-06-20 21:53:53 -0500 | [diff] [blame] | 32 | /* |
| 33 | * We track the state of the socket on a given connection using |
| 34 | * values defined below. The transition to a new socket state is |
| 35 | * handled by a function which verifies we aren't coming from an |
| 36 | * unexpected state. |
| 37 | * |
| 38 | * -------- |
| 39 | * | NEW* | transient initial state |
| 40 | * -------- |
| 41 | * | con_sock_state_init() |
| 42 | * v |
| 43 | * ---------- |
| 44 | * | CLOSED | initialized, but no socket (and no |
| 45 | * ---------- TCP connection) |
| 46 | * ^ \ |
| 47 | * | \ con_sock_state_connecting() |
| 48 | * | ---------------------- |
| 49 | * | \ |
| 50 | * + con_sock_state_closed() \ |
Sage Weil | fbb85a4 | 2012-06-27 12:31:02 -0700 | [diff] [blame] | 51 | * |+--------------------------- \ |
| 52 | * | \ \ \ |
| 53 | * | ----------- \ \ |
| 54 | * | | CLOSING | socket event; \ \ |
| 55 | * | ----------- await close \ \ |
| 56 | * | ^ \ | |
| 57 | * | | \ | |
| 58 | * | + con_sock_state_closing() \ | |
| 59 | * | / \ | | |
| 60 | * | / --------------- | | |
| 61 | * | / \ v v |
Alex Elder | bc18f4b | 2012-06-20 21:53:53 -0500 | [diff] [blame] | 62 | * | / -------------- |
| 63 | * | / -----------------| CONNECTING | socket created, TCP |
| 64 | * | | / -------------- connect initiated |
| 65 | * | | | con_sock_state_connected() |
| 66 | * | | v |
| 67 | * ------------- |
| 68 | * | CONNECTED | TCP connection established |
| 69 | * ------------- |
| 70 | * |
| 71 | * State values for ceph_connection->sock_state; NEW is assumed to be 0. |
| 72 | */ |
Alex Elder | ce2c890 | 2012-05-22 22:15:49 -0500 | [diff] [blame] | 73 | |
| 74 | #define CON_SOCK_STATE_NEW 0 /* -> CLOSED */ |
| 75 | #define CON_SOCK_STATE_CLOSED 1 /* -> CONNECTING */ |
| 76 | #define CON_SOCK_STATE_CONNECTING 2 /* -> CONNECTED or -> CLOSING */ |
| 77 | #define CON_SOCK_STATE_CONNECTED 3 /* -> CLOSING or -> CLOSED */ |
| 78 | #define CON_SOCK_STATE_CLOSING 4 /* -> CLOSED */ |
| 79 | |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 80 | /* |
| 81 | * connection states |
| 82 | */ |
| 83 | #define CON_STATE_CLOSED 1 /* -> PREOPEN */ |
| 84 | #define CON_STATE_PREOPEN 2 /* -> CONNECTING, CLOSED */ |
| 85 | #define CON_STATE_CONNECTING 3 /* -> NEGOTIATING, CLOSED */ |
| 86 | #define CON_STATE_NEGOTIATING 4 /* -> OPEN, CLOSED */ |
| 87 | #define CON_STATE_OPEN 5 /* -> STANDBY, CLOSED */ |
| 88 | #define CON_STATE_STANDBY 6 /* -> PREOPEN, CLOSED */ |
| 89 | |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 90 | /* |
| 91 | * ceph_connection flag bits |
| 92 | */ |
| 93 | #define CON_FLAG_LOSSYTX 0 /* we can close channel or drop |
| 94 | * messages on errors */ |
| 95 | #define CON_FLAG_KEEPALIVE_PENDING 1 /* we need to send a keepalive */ |
| 96 | #define CON_FLAG_WRITE_PENDING 2 /* we have data ready to send */ |
| 97 | #define CON_FLAG_SOCK_CLOSED 3 /* socket state changed to closed */ |
| 98 | #define CON_FLAG_BACKOFF 4 /* need to retry queuing delayed work */ |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 99 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 100 | /* static tag bytes (protocol control messages) */ |
| 101 | static char tag_msg = CEPH_MSGR_TAG_MSG; |
| 102 | static char tag_ack = CEPH_MSGR_TAG_ACK; |
| 103 | static char tag_keepalive = CEPH_MSGR_TAG_KEEPALIVE; |
| 104 | |
Sage Weil | a6a5349 | 2010-04-13 14:07:07 -0700 | [diff] [blame] | 105 | #ifdef CONFIG_LOCKDEP |
| 106 | static struct lock_class_key socket_class; |
| 107 | #endif |
| 108 | |
Alex Elder | 84495f4 | 2012-02-15 07:43:55 -0600 | [diff] [blame] | 109 | /* |
| 110 | * When skipping (ignoring) a block of input we read it into a "skip |
| 111 | * buffer," which is this many bytes in size. |
| 112 | */ |
| 113 | #define SKIP_BUF_SIZE 1024 |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 114 | |
| 115 | static void queue_con(struct ceph_connection *con); |
| 116 | static void con_work(struct work_struct *); |
| 117 | static void ceph_fault(struct ceph_connection *con); |
| 118 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 119 | /* |
Alex Elder | f64a931 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 120 | * Nicely render a sockaddr as a string. An array of formatted |
| 121 | * strings is used, to approximate reentrancy. |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 122 | */ |
Alex Elder | f64a931 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 123 | #define ADDR_STR_COUNT_LOG 5 /* log2(# address strings in array) */ |
| 124 | #define ADDR_STR_COUNT (1 << ADDR_STR_COUNT_LOG) |
| 125 | #define ADDR_STR_COUNT_MASK (ADDR_STR_COUNT - 1) |
| 126 | #define MAX_ADDR_STR_LEN 64 /* 54 is enough */ |
| 127 | |
| 128 | static char addr_str[ADDR_STR_COUNT][MAX_ADDR_STR_LEN]; |
| 129 | static atomic_t addr_str_seq = ATOMIC_INIT(0); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 130 | |
Alex Elder | 5766651 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 131 | static struct page *zero_page; /* used in certain error cases */ |
Alex Elder | 5766651 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 132 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 133 | const char *ceph_pr_addr(const struct sockaddr_storage *ss) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 134 | { |
| 135 | int i; |
| 136 | char *s; |
Alex Elder | 99f0f3b | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 137 | struct sockaddr_in *in4 = (struct sockaddr_in *) ss; |
| 138 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) ss; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 139 | |
Alex Elder | f64a931 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 140 | i = atomic_inc_return(&addr_str_seq) & ADDR_STR_COUNT_MASK; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 141 | s = addr_str[i]; |
| 142 | |
| 143 | switch (ss->ss_family) { |
| 144 | case AF_INET: |
Alex Elder | bd40614 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 145 | snprintf(s, MAX_ADDR_STR_LEN, "%pI4:%hu", &in4->sin_addr, |
| 146 | ntohs(in4->sin_port)); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 147 | break; |
| 148 | |
| 149 | case AF_INET6: |
Alex Elder | bd40614 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 150 | snprintf(s, MAX_ADDR_STR_LEN, "[%pI6c]:%hu", &in6->sin6_addr, |
| 151 | ntohs(in6->sin6_port)); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 152 | break; |
| 153 | |
| 154 | default: |
Alex Elder | d3002b9 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 155 | snprintf(s, MAX_ADDR_STR_LEN, "(unknown sockaddr family %hu)", |
| 156 | ss->ss_family); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 157 | } |
| 158 | |
| 159 | return s; |
| 160 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 161 | EXPORT_SYMBOL(ceph_pr_addr); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 162 | |
Sage Weil | 63f2d21 | 2009-11-03 15:17:56 -0800 | [diff] [blame] | 163 | static void encode_my_addr(struct ceph_messenger *msgr) |
| 164 | { |
| 165 | memcpy(&msgr->my_enc_addr, &msgr->inst.addr, sizeof(msgr->my_enc_addr)); |
| 166 | ceph_encode_addr(&msgr->my_enc_addr); |
| 167 | } |
| 168 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 169 | /* |
| 170 | * work queue for all reading and writing to/from the socket. |
| 171 | */ |
Alex Elder | e0f43c9 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 172 | static struct workqueue_struct *ceph_msgr_wq; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 173 | |
Alex Elder | 6173d1f | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 174 | void _ceph_msgr_exit(void) |
| 175 | { |
Alex Elder | d3002b9 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 176 | if (ceph_msgr_wq) { |
Alex Elder | 6173d1f | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 177 | destroy_workqueue(ceph_msgr_wq); |
Alex Elder | d3002b9 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 178 | ceph_msgr_wq = NULL; |
| 179 | } |
Alex Elder | 6173d1f | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 180 | |
Alex Elder | 6173d1f | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 181 | BUG_ON(zero_page == NULL); |
| 182 | kunmap(zero_page); |
| 183 | page_cache_release(zero_page); |
| 184 | zero_page = NULL; |
| 185 | } |
| 186 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 187 | int ceph_msgr_init(void) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 188 | { |
Alex Elder | 5766651 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 189 | BUG_ON(zero_page != NULL); |
| 190 | zero_page = ZERO_PAGE(0); |
| 191 | page_cache_get(zero_page); |
| 192 | |
Tejun Heo | f363e45 | 2011-01-03 14:49:46 +0100 | [diff] [blame] | 193 | ceph_msgr_wq = alloc_workqueue("ceph-msgr", WQ_NON_REENTRANT, 0); |
Alex Elder | 6173d1f | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 194 | if (ceph_msgr_wq) |
| 195 | return 0; |
Alex Elder | 5766651 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 196 | |
Alex Elder | 6173d1f | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 197 | pr_err("msgr_init failed to create workqueue\n"); |
| 198 | _ceph_msgr_exit(); |
Alex Elder | 5766651 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 199 | |
Alex Elder | 6173d1f | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 200 | return -ENOMEM; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 201 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 202 | EXPORT_SYMBOL(ceph_msgr_init); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 203 | |
| 204 | void ceph_msgr_exit(void) |
| 205 | { |
Alex Elder | 5766651 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 206 | BUG_ON(ceph_msgr_wq == NULL); |
Alex Elder | 5766651 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 207 | |
Alex Elder | 6173d1f | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 208 | _ceph_msgr_exit(); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 209 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 210 | EXPORT_SYMBOL(ceph_msgr_exit); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 211 | |
Yehuda Sadeh | cd84db6 | 2010-06-11 16:58:48 -0700 | [diff] [blame] | 212 | void ceph_msgr_flush(void) |
Sage Weil | a922d38 | 2010-05-29 09:41:23 -0700 | [diff] [blame] | 213 | { |
| 214 | flush_workqueue(ceph_msgr_wq); |
| 215 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 216 | EXPORT_SYMBOL(ceph_msgr_flush); |
Sage Weil | a922d38 | 2010-05-29 09:41:23 -0700 | [diff] [blame] | 217 | |
Alex Elder | ce2c890 | 2012-05-22 22:15:49 -0500 | [diff] [blame] | 218 | /* Connection socket state transition functions */ |
| 219 | |
| 220 | static void con_sock_state_init(struct ceph_connection *con) |
| 221 | { |
| 222 | int old_state; |
| 223 | |
| 224 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED); |
| 225 | if (WARN_ON(old_state != CON_SOCK_STATE_NEW)) |
| 226 | printk("%s: unexpected old state %d\n", __func__, old_state); |
Sage Weil | 8007b8d | 2012-07-30 18:16:16 -0700 | [diff] [blame] | 227 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
| 228 | CON_SOCK_STATE_CLOSED); |
Alex Elder | ce2c890 | 2012-05-22 22:15:49 -0500 | [diff] [blame] | 229 | } |
| 230 | |
| 231 | static void con_sock_state_connecting(struct ceph_connection *con) |
| 232 | { |
| 233 | int old_state; |
| 234 | |
| 235 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTING); |
| 236 | if (WARN_ON(old_state != CON_SOCK_STATE_CLOSED)) |
| 237 | printk("%s: unexpected old state %d\n", __func__, old_state); |
Sage Weil | 8007b8d | 2012-07-30 18:16:16 -0700 | [diff] [blame] | 238 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
| 239 | CON_SOCK_STATE_CONNECTING); |
Alex Elder | ce2c890 | 2012-05-22 22:15:49 -0500 | [diff] [blame] | 240 | } |
| 241 | |
| 242 | static void con_sock_state_connected(struct ceph_connection *con) |
| 243 | { |
| 244 | int old_state; |
| 245 | |
| 246 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTED); |
| 247 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING)) |
| 248 | printk("%s: unexpected old state %d\n", __func__, old_state); |
Sage Weil | 8007b8d | 2012-07-30 18:16:16 -0700 | [diff] [blame] | 249 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
| 250 | CON_SOCK_STATE_CONNECTED); |
Alex Elder | ce2c890 | 2012-05-22 22:15:49 -0500 | [diff] [blame] | 251 | } |
| 252 | |
| 253 | static void con_sock_state_closing(struct ceph_connection *con) |
| 254 | { |
| 255 | int old_state; |
| 256 | |
| 257 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSING); |
| 258 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING && |
| 259 | old_state != CON_SOCK_STATE_CONNECTED && |
| 260 | old_state != CON_SOCK_STATE_CLOSING)) |
| 261 | printk("%s: unexpected old state %d\n", __func__, old_state); |
Sage Weil | 8007b8d | 2012-07-30 18:16:16 -0700 | [diff] [blame] | 262 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
| 263 | CON_SOCK_STATE_CLOSING); |
Alex Elder | ce2c890 | 2012-05-22 22:15:49 -0500 | [diff] [blame] | 264 | } |
| 265 | |
| 266 | static void con_sock_state_closed(struct ceph_connection *con) |
| 267 | { |
| 268 | int old_state; |
| 269 | |
| 270 | old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED); |
| 271 | if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTED && |
Sage Weil | fbb85a4 | 2012-06-27 12:31:02 -0700 | [diff] [blame] | 272 | old_state != CON_SOCK_STATE_CLOSING && |
Sage Weil | 8007b8d | 2012-07-30 18:16:16 -0700 | [diff] [blame] | 273 | old_state != CON_SOCK_STATE_CONNECTING && |
| 274 | old_state != CON_SOCK_STATE_CLOSED)) |
Alex Elder | ce2c890 | 2012-05-22 22:15:49 -0500 | [diff] [blame] | 275 | printk("%s: unexpected old state %d\n", __func__, old_state); |
Sage Weil | 8007b8d | 2012-07-30 18:16:16 -0700 | [diff] [blame] | 276 | dout("%s con %p sock %d -> %d\n", __func__, con, old_state, |
| 277 | CON_SOCK_STATE_CLOSED); |
Alex Elder | ce2c890 | 2012-05-22 22:15:49 -0500 | [diff] [blame] | 278 | } |
Sage Weil | a922d38 | 2010-05-29 09:41:23 -0700 | [diff] [blame] | 279 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 280 | /* |
| 281 | * socket callback functions |
| 282 | */ |
| 283 | |
| 284 | /* data available on socket, or listen socket received a connect */ |
Alex Elder | 327800b | 2012-05-22 11:41:43 -0500 | [diff] [blame] | 285 | static void ceph_sock_data_ready(struct sock *sk, int count_unused) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 286 | { |
Alex Elder | bd40614 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 287 | struct ceph_connection *con = sk->sk_user_data; |
Guanjun He | a2a3258 | 2012-07-08 19:50:33 -0700 | [diff] [blame] | 288 | if (atomic_read(&con->msgr->stopping)) { |
| 289 | return; |
| 290 | } |
Alex Elder | bd40614 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 291 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 292 | if (sk->sk_state != TCP_CLOSE_WAIT) { |
Alex Elder | 327800b | 2012-05-22 11:41:43 -0500 | [diff] [blame] | 293 | dout("%s on %p state = %lu, queueing work\n", __func__, |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 294 | con, con->state); |
| 295 | queue_con(con); |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | /* socket has buffer space for writing */ |
Alex Elder | 327800b | 2012-05-22 11:41:43 -0500 | [diff] [blame] | 300 | static void ceph_sock_write_space(struct sock *sk) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 301 | { |
Alex Elder | d3002b9 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 302 | struct ceph_connection *con = sk->sk_user_data; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 303 | |
Jim Schutt | 182fac2 | 2012-02-29 08:30:58 -0700 | [diff] [blame] | 304 | /* only queue to workqueue if there is data we want to write, |
| 305 | * and there is sufficient space in the socket buffer to accept |
Alex Elder | 327800b | 2012-05-22 11:41:43 -0500 | [diff] [blame] | 306 | * more data. clear SOCK_NOSPACE so that ceph_sock_write_space() |
Jim Schutt | 182fac2 | 2012-02-29 08:30:58 -0700 | [diff] [blame] | 307 | * doesn't get called again until try_write() fills the socket |
| 308 | * buffer. See net/ipv4/tcp_input.c:tcp_check_space() |
| 309 | * and net/core/stream.c:sk_stream_write_space(). |
| 310 | */ |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 311 | if (test_bit(CON_FLAG_WRITE_PENDING, &con->flags)) { |
Jim Schutt | 182fac2 | 2012-02-29 08:30:58 -0700 | [diff] [blame] | 312 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) { |
Alex Elder | 327800b | 2012-05-22 11:41:43 -0500 | [diff] [blame] | 313 | dout("%s %p queueing write work\n", __func__, con); |
Jim Schutt | 182fac2 | 2012-02-29 08:30:58 -0700 | [diff] [blame] | 314 | clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
| 315 | queue_con(con); |
| 316 | } |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 317 | } else { |
Alex Elder | 327800b | 2012-05-22 11:41:43 -0500 | [diff] [blame] | 318 | dout("%s %p nothing to write\n", __func__, con); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 319 | } |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 320 | } |
| 321 | |
| 322 | /* socket's state has changed */ |
Alex Elder | 327800b | 2012-05-22 11:41:43 -0500 | [diff] [blame] | 323 | static void ceph_sock_state_change(struct sock *sk) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 324 | { |
Alex Elder | bd40614 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 325 | struct ceph_connection *con = sk->sk_user_data; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 326 | |
Alex Elder | 327800b | 2012-05-22 11:41:43 -0500 | [diff] [blame] | 327 | dout("%s %p state = %lu sk_state = %u\n", __func__, |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 328 | con, con->state, sk->sk_state); |
| 329 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 330 | switch (sk->sk_state) { |
| 331 | case TCP_CLOSE: |
Alex Elder | 327800b | 2012-05-22 11:41:43 -0500 | [diff] [blame] | 332 | dout("%s TCP_CLOSE\n", __func__); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 333 | case TCP_CLOSE_WAIT: |
Alex Elder | 327800b | 2012-05-22 11:41:43 -0500 | [diff] [blame] | 334 | dout("%s TCP_CLOSE_WAIT\n", __func__); |
Alex Elder | ce2c890 | 2012-05-22 22:15:49 -0500 | [diff] [blame] | 335 | con_sock_state_closing(con); |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 336 | set_bit(CON_FLAG_SOCK_CLOSED, &con->flags); |
Alex Elder | d65c9e0 | 2012-06-20 21:53:53 -0500 | [diff] [blame] | 337 | queue_con(con); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 338 | break; |
| 339 | case TCP_ESTABLISHED: |
Alex Elder | 327800b | 2012-05-22 11:41:43 -0500 | [diff] [blame] | 340 | dout("%s TCP_ESTABLISHED\n", __func__); |
Alex Elder | ce2c890 | 2012-05-22 22:15:49 -0500 | [diff] [blame] | 341 | con_sock_state_connected(con); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 342 | queue_con(con); |
| 343 | break; |
Alex Elder | d3002b9 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 344 | default: /* Everything else is uninteresting */ |
| 345 | break; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 346 | } |
| 347 | } |
| 348 | |
| 349 | /* |
| 350 | * set up socket callbacks |
| 351 | */ |
| 352 | static void set_sock_callbacks(struct socket *sock, |
| 353 | struct ceph_connection *con) |
| 354 | { |
| 355 | struct sock *sk = sock->sk; |
Alex Elder | bd40614 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 356 | sk->sk_user_data = con; |
Alex Elder | 327800b | 2012-05-22 11:41:43 -0500 | [diff] [blame] | 357 | sk->sk_data_ready = ceph_sock_data_ready; |
| 358 | sk->sk_write_space = ceph_sock_write_space; |
| 359 | sk->sk_state_change = ceph_sock_state_change; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 360 | } |
| 361 | |
| 362 | |
| 363 | /* |
| 364 | * socket helpers |
| 365 | */ |
| 366 | |
| 367 | /* |
| 368 | * initiate connection to a remote socket. |
| 369 | */ |
Alex Elder | 41617d0 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 370 | static int ceph_tcp_connect(struct ceph_connection *con) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 371 | { |
Sage Weil | f91d347 | 2010-07-01 15:18:31 -0700 | [diff] [blame] | 372 | struct sockaddr_storage *paddr = &con->peer_addr.in_addr; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 373 | struct socket *sock; |
| 374 | int ret; |
| 375 | |
| 376 | BUG_ON(con->sock); |
Sage Weil | f91d347 | 2010-07-01 15:18:31 -0700 | [diff] [blame] | 377 | ret = sock_create_kern(con->peer_addr.in_addr.ss_family, SOCK_STREAM, |
| 378 | IPPROTO_TCP, &sock); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 379 | if (ret) |
Alex Elder | 41617d0 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 380 | return ret; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 381 | sock->sk->sk_allocation = GFP_NOFS; |
| 382 | |
Sage Weil | a6a5349 | 2010-04-13 14:07:07 -0700 | [diff] [blame] | 383 | #ifdef CONFIG_LOCKDEP |
| 384 | lockdep_set_class(&sock->sk->sk_lock, &socket_class); |
| 385 | #endif |
| 386 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 387 | set_sock_callbacks(sock, con); |
| 388 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 389 | dout("connect %s\n", ceph_pr_addr(&con->peer_addr.in_addr)); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 390 | |
Sage Weil | 89a86be | 2012-06-09 14:19:21 -0700 | [diff] [blame] | 391 | con_sock_state_connecting(con); |
Sage Weil | f91d347 | 2010-07-01 15:18:31 -0700 | [diff] [blame] | 392 | ret = sock->ops->connect(sock, (struct sockaddr *)paddr, sizeof(*paddr), |
| 393 | O_NONBLOCK); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 394 | if (ret == -EINPROGRESS) { |
| 395 | dout("connect %s EINPROGRESS sk_state = %u\n", |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 396 | ceph_pr_addr(&con->peer_addr.in_addr), |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 397 | sock->sk->sk_state); |
Alex Elder | a5bc3129a | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 398 | } else if (ret < 0) { |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 399 | pr_err("connect %s error %d\n", |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 400 | ceph_pr_addr(&con->peer_addr.in_addr), ret); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 401 | sock_release(sock); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 402 | con->error_msg = "connect error"; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 403 | |
Alex Elder | 41617d0 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 404 | return ret; |
Alex Elder | a5bc3129a | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 405 | } |
| 406 | con->sock = sock; |
Alex Elder | 41617d0 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 407 | return 0; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 408 | } |
| 409 | |
| 410 | static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len) |
| 411 | { |
| 412 | struct kvec iov = {buf, len}; |
| 413 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; |
Sage Weil | 98bdb0a | 2011-01-25 08:17:48 -0800 | [diff] [blame] | 414 | int r; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 415 | |
Sage Weil | 98bdb0a | 2011-01-25 08:17:48 -0800 | [diff] [blame] | 416 | r = kernel_recvmsg(sock, &msg, &iov, 1, len, msg.msg_flags); |
| 417 | if (r == -EAGAIN) |
| 418 | r = 0; |
| 419 | return r; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 420 | } |
| 421 | |
| 422 | /* |
| 423 | * write something. @more is true if caller will be sending more data |
| 424 | * shortly. |
| 425 | */ |
| 426 | static int ceph_tcp_sendmsg(struct socket *sock, struct kvec *iov, |
| 427 | size_t kvlen, size_t len, int more) |
| 428 | { |
| 429 | struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; |
Sage Weil | 42961d2 | 2011-01-25 08:19:34 -0800 | [diff] [blame] | 430 | int r; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 431 | |
| 432 | if (more) |
| 433 | msg.msg_flags |= MSG_MORE; |
| 434 | else |
| 435 | msg.msg_flags |= MSG_EOR; /* superfluous, but what the hell */ |
| 436 | |
Sage Weil | 42961d2 | 2011-01-25 08:19:34 -0800 | [diff] [blame] | 437 | r = kernel_sendmsg(sock, &msg, iov, kvlen, len); |
| 438 | if (r == -EAGAIN) |
| 439 | r = 0; |
| 440 | return r; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 441 | } |
| 442 | |
Alex Elder | 3173913 | 2012-03-07 11:40:08 -0600 | [diff] [blame] | 443 | static int ceph_tcp_sendpage(struct socket *sock, struct page *page, |
| 444 | int offset, size_t size, int more) |
| 445 | { |
| 446 | int flags = MSG_DONTWAIT | MSG_NOSIGNAL | (more ? MSG_MORE : MSG_EOR); |
| 447 | int ret; |
| 448 | |
| 449 | ret = kernel_sendpage(sock, page, offset, size, flags); |
| 450 | if (ret == -EAGAIN) |
| 451 | ret = 0; |
| 452 | |
| 453 | return ret; |
| 454 | } |
| 455 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 456 | |
| 457 | /* |
| 458 | * Shutdown/close the socket for the given connection. |
| 459 | */ |
| 460 | static int con_close_socket(struct ceph_connection *con) |
| 461 | { |
Sage Weil | 8007b8d | 2012-07-30 18:16:16 -0700 | [diff] [blame] | 462 | int rc = 0; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 463 | |
| 464 | dout("con_close_socket on %p sock %p\n", con, con->sock); |
Sage Weil | 8007b8d | 2012-07-30 18:16:16 -0700 | [diff] [blame] | 465 | if (con->sock) { |
| 466 | rc = con->sock->ops->shutdown(con->sock, SHUT_RDWR); |
| 467 | sock_release(con->sock); |
| 468 | con->sock = NULL; |
| 469 | } |
Alex Elder | 456ea46 | 2012-06-20 21:53:53 -0500 | [diff] [blame] | 470 | |
| 471 | /* |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 472 | * Forcibly clear the SOCK_CLOSED flag. It gets set |
Alex Elder | 456ea46 | 2012-06-20 21:53:53 -0500 | [diff] [blame] | 473 | * independent of the connection mutex, and we could have |
| 474 | * received a socket close event before we had the chance to |
| 475 | * shut the socket down. |
| 476 | */ |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 477 | clear_bit(CON_FLAG_SOCK_CLOSED, &con->flags); |
Sage Weil | 8007b8d | 2012-07-30 18:16:16 -0700 | [diff] [blame] | 478 | |
Alex Elder | ce2c890 | 2012-05-22 22:15:49 -0500 | [diff] [blame] | 479 | con_sock_state_closed(con); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 480 | return rc; |
| 481 | } |
| 482 | |
| 483 | /* |
| 484 | * Reset a connection. Discard all incoming and outgoing messages |
| 485 | * and clear *_seq state. |
| 486 | */ |
| 487 | static void ceph_msg_remove(struct ceph_msg *msg) |
| 488 | { |
| 489 | list_del_init(&msg->list_head); |
Alex Elder | 38941f8 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 490 | BUG_ON(msg->con == NULL); |
Sage Weil | 36eb71a | 2012-06-21 12:47:08 -0700 | [diff] [blame] | 491 | msg->con->ops->put(msg->con); |
Alex Elder | 38941f8 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 492 | msg->con = NULL; |
| 493 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 494 | ceph_msg_put(msg); |
| 495 | } |
| 496 | static void ceph_msg_remove_list(struct list_head *head) |
| 497 | { |
| 498 | while (!list_empty(head)) { |
| 499 | struct ceph_msg *msg = list_first_entry(head, struct ceph_msg, |
| 500 | list_head); |
| 501 | ceph_msg_remove(msg); |
| 502 | } |
| 503 | } |
| 504 | |
| 505 | static void reset_connection(struct ceph_connection *con) |
| 506 | { |
| 507 | /* reset connection, out_queue, msg_ and connect_seq */ |
| 508 | /* discard existing out_queue and msg_seq */ |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 509 | ceph_msg_remove_list(&con->out_queue); |
| 510 | ceph_msg_remove_list(&con->out_sent); |
| 511 | |
Sage Weil | cf3e5c4 | 2009-12-11 09:48:05 -0800 | [diff] [blame] | 512 | if (con->in_msg) { |
Alex Elder | 38941f8 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 513 | BUG_ON(con->in_msg->con != con); |
| 514 | con->in_msg->con = NULL; |
Sage Weil | cf3e5c4 | 2009-12-11 09:48:05 -0800 | [diff] [blame] | 515 | ceph_msg_put(con->in_msg); |
| 516 | con->in_msg = NULL; |
Sage Weil | 36eb71a | 2012-06-21 12:47:08 -0700 | [diff] [blame] | 517 | con->ops->put(con); |
Sage Weil | cf3e5c4 | 2009-12-11 09:48:05 -0800 | [diff] [blame] | 518 | } |
| 519 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 520 | con->connect_seq = 0; |
| 521 | con->out_seq = 0; |
Sage Weil | c86a293 | 2009-12-14 14:04:30 -0800 | [diff] [blame] | 522 | if (con->out_msg) { |
| 523 | ceph_msg_put(con->out_msg); |
| 524 | con->out_msg = NULL; |
| 525 | } |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 526 | con->in_seq = 0; |
Sage Weil | 0e0d5e0 | 2010-04-02 16:07:19 -0700 | [diff] [blame] | 527 | con->in_seq_acked = 0; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 528 | } |
| 529 | |
| 530 | /* |
| 531 | * mark a peer down. drop any open connections. |
| 532 | */ |
| 533 | void ceph_con_close(struct ceph_connection *con) |
| 534 | { |
Sage Weil | 8c50c81 | 2012-07-30 16:24:37 -0700 | [diff] [blame] | 535 | mutex_lock(&con->mutex); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 536 | dout("con_close %p peer %s\n", con, |
| 537 | ceph_pr_addr(&con->peer_addr.in_addr)); |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 538 | con->state = CON_STATE_CLOSED; |
Alex Elder | a5988c4 | 2012-05-29 11:04:58 -0500 | [diff] [blame] | 539 | |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 540 | clear_bit(CON_FLAG_LOSSYTX, &con->flags); /* so we retry next connect */ |
| 541 | clear_bit(CON_FLAG_KEEPALIVE_PENDING, &con->flags); |
| 542 | clear_bit(CON_FLAG_WRITE_PENDING, &con->flags); |
Sage Weil | 43c7427 | 2012-07-20 17:30:40 -0700 | [diff] [blame] | 543 | clear_bit(CON_FLAG_KEEPALIVE_PENDING, &con->flags); |
| 544 | clear_bit(CON_FLAG_BACKOFF, &con->flags); |
Alex Elder | a5988c4 | 2012-05-29 11:04:58 -0500 | [diff] [blame] | 545 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 546 | reset_connection(con); |
Sage Weil | 6f2bc3f | 2010-04-02 16:16:34 -0700 | [diff] [blame] | 547 | con->peer_global_seq = 0; |
Sage Weil | 91e45ce3 | 2010-02-15 12:05:09 -0800 | [diff] [blame] | 548 | cancel_delayed_work(&con->work); |
Sage Weil | ee76e07 | 2012-07-20 16:45:49 -0700 | [diff] [blame] | 549 | con_close_socket(con); |
Sage Weil | ec30264 | 2009-12-22 10:43:42 -0800 | [diff] [blame] | 550 | mutex_unlock(&con->mutex); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 551 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 552 | EXPORT_SYMBOL(ceph_con_close); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 553 | |
| 554 | /* |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 555 | * Reopen a closed connection, with a new peer address. |
| 556 | */ |
Sage Weil | b7a9e5d | 2012-06-27 12:24:08 -0700 | [diff] [blame] | 557 | void ceph_con_open(struct ceph_connection *con, |
| 558 | __u8 entity_type, __u64 entity_num, |
| 559 | struct ceph_entity_addr *addr) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 560 | { |
Sage Weil | 5469155 | 2012-07-30 16:21:40 -0700 | [diff] [blame] | 561 | mutex_lock(&con->mutex); |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 562 | dout("con_open %p %s\n", con, ceph_pr_addr(&addr->in_addr)); |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 563 | |
| 564 | BUG_ON(con->state != CON_STATE_CLOSED); |
| 565 | con->state = CON_STATE_PREOPEN; |
Alex Elder | a5988c4 | 2012-05-29 11:04:58 -0500 | [diff] [blame] | 566 | |
Sage Weil | b7a9e5d | 2012-06-27 12:24:08 -0700 | [diff] [blame] | 567 | con->peer_name.type = (__u8) entity_type; |
| 568 | con->peer_name.num = cpu_to_le64(entity_num); |
| 569 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 570 | memcpy(&con->peer_addr, addr, sizeof(*addr)); |
Sage Weil | 03c677e | 2009-11-20 15:14:15 -0800 | [diff] [blame] | 571 | con->delay = 0; /* reset backoff memory */ |
Sage Weil | 5469155 | 2012-07-30 16:21:40 -0700 | [diff] [blame] | 572 | mutex_unlock(&con->mutex); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 573 | queue_con(con); |
| 574 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 575 | EXPORT_SYMBOL(ceph_con_open); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 576 | |
| 577 | /* |
Sage Weil | 87b315a | 2010-03-22 14:51:18 -0700 | [diff] [blame] | 578 | * return true if this connection ever successfully opened |
| 579 | */ |
| 580 | bool ceph_con_opened(struct ceph_connection *con) |
| 581 | { |
| 582 | return con->connect_seq > 0; |
| 583 | } |
| 584 | |
| 585 | /* |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 586 | * initialize a new connection. |
| 587 | */ |
Alex Elder | 1bfd89f | 2012-05-26 23:26:43 -0500 | [diff] [blame] | 588 | void ceph_con_init(struct ceph_connection *con, void *private, |
| 589 | const struct ceph_connection_operations *ops, |
Sage Weil | b7a9e5d | 2012-06-27 12:24:08 -0700 | [diff] [blame] | 590 | struct ceph_messenger *msgr) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 591 | { |
| 592 | dout("con_init %p\n", con); |
| 593 | memset(con, 0, sizeof(*con)); |
Alex Elder | 1bfd89f | 2012-05-26 23:26:43 -0500 | [diff] [blame] | 594 | con->private = private; |
| 595 | con->ops = ops; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 596 | con->msgr = msgr; |
Alex Elder | ce2c890 | 2012-05-22 22:15:49 -0500 | [diff] [blame] | 597 | |
| 598 | con_sock_state_init(con); |
| 599 | |
Sage Weil | ec30264 | 2009-12-22 10:43:42 -0800 | [diff] [blame] | 600 | mutex_init(&con->mutex); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 601 | INIT_LIST_HEAD(&con->out_queue); |
| 602 | INIT_LIST_HEAD(&con->out_sent); |
| 603 | INIT_DELAYED_WORK(&con->work, con_work); |
Alex Elder | a5988c4 | 2012-05-29 11:04:58 -0500 | [diff] [blame] | 604 | |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 605 | con->state = CON_STATE_CLOSED; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 606 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 607 | EXPORT_SYMBOL(ceph_con_init); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 608 | |
| 609 | |
| 610 | /* |
| 611 | * We maintain a global counter to order connection attempts. Get |
| 612 | * a unique seq greater than @gt. |
| 613 | */ |
| 614 | static u32 get_global_seq(struct ceph_messenger *msgr, u32 gt) |
| 615 | { |
| 616 | u32 ret; |
| 617 | |
| 618 | spin_lock(&msgr->global_seq_lock); |
| 619 | if (msgr->global_seq < gt) |
| 620 | msgr->global_seq = gt; |
| 621 | ret = ++msgr->global_seq; |
| 622 | spin_unlock(&msgr->global_seq_lock); |
| 623 | return ret; |
| 624 | } |
| 625 | |
Alex Elder | e220042 | 2012-05-23 14:35:23 -0500 | [diff] [blame] | 626 | static void con_out_kvec_reset(struct ceph_connection *con) |
Alex Elder | 859eb79 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 627 | { |
| 628 | con->out_kvec_left = 0; |
| 629 | con->out_kvec_bytes = 0; |
| 630 | con->out_kvec_cur = &con->out_kvec[0]; |
| 631 | } |
| 632 | |
Alex Elder | e220042 | 2012-05-23 14:35:23 -0500 | [diff] [blame] | 633 | static void con_out_kvec_add(struct ceph_connection *con, |
Alex Elder | 859eb79 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 634 | size_t size, void *data) |
| 635 | { |
| 636 | int index; |
| 637 | |
| 638 | index = con->out_kvec_left; |
| 639 | BUG_ON(index >= ARRAY_SIZE(con->out_kvec)); |
| 640 | |
| 641 | con->out_kvec[index].iov_len = size; |
| 642 | con->out_kvec[index].iov_base = data; |
| 643 | con->out_kvec_left++; |
| 644 | con->out_kvec_bytes += size; |
| 645 | } |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 646 | |
Alex Elder | df6ad1f | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 647 | #ifdef CONFIG_BLOCK |
| 648 | static void init_bio_iter(struct bio *bio, struct bio **iter, int *seg) |
| 649 | { |
| 650 | if (!bio) { |
| 651 | *iter = NULL; |
| 652 | *seg = 0; |
| 653 | return; |
| 654 | } |
| 655 | *iter = bio; |
| 656 | *seg = bio->bi_idx; |
| 657 | } |
| 658 | |
| 659 | static void iter_bio_next(struct bio **bio_iter, int *seg) |
| 660 | { |
| 661 | if (*bio_iter == NULL) |
| 662 | return; |
| 663 | |
| 664 | BUG_ON(*seg >= (*bio_iter)->bi_vcnt); |
| 665 | |
| 666 | (*seg)++; |
| 667 | if (*seg == (*bio_iter)->bi_vcnt) |
| 668 | init_bio_iter((*bio_iter)->bi_next, bio_iter, seg); |
| 669 | } |
| 670 | #endif |
| 671 | |
Alex Elder | 739c905 | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 672 | static void prepare_write_message_data(struct ceph_connection *con) |
| 673 | { |
| 674 | struct ceph_msg *msg = con->out_msg; |
| 675 | |
| 676 | BUG_ON(!msg); |
| 677 | BUG_ON(!msg->hdr.data_len); |
| 678 | |
| 679 | /* initialize page iterator */ |
| 680 | con->out_msg_pos.page = 0; |
| 681 | if (msg->pages) |
| 682 | con->out_msg_pos.page_pos = msg->page_alignment; |
| 683 | else |
| 684 | con->out_msg_pos.page_pos = 0; |
Alex Elder | 572c588 | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 685 | #ifdef CONFIG_BLOCK |
Alex Elder | abdaa6a | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 686 | if (msg->bio) |
Alex Elder | 572c588 | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 687 | init_bio_iter(msg->bio, &msg->bio_iter, &msg->bio_seg); |
| 688 | #endif |
Alex Elder | 739c905 | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 689 | con->out_msg_pos.data_pos = 0; |
| 690 | con->out_msg_pos.did_page_crc = false; |
| 691 | con->out_more = 1; /* data + footer will follow */ |
| 692 | } |
| 693 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 694 | /* |
| 695 | * Prepare footer for currently outgoing message, and finish things |
| 696 | * off. Assumes out_kvec* are already valid.. we just add on to the end. |
| 697 | */ |
Alex Elder | 859eb79 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 698 | static void prepare_write_message_footer(struct ceph_connection *con) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 699 | { |
| 700 | struct ceph_msg *m = con->out_msg; |
Alex Elder | 859eb79 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 701 | int v = con->out_kvec_left; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 702 | |
Alex Elder | fd154f3 | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 703 | m->footer.flags |= CEPH_MSG_FOOTER_COMPLETE; |
| 704 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 705 | dout("prepare_write_message_footer %p\n", con); |
| 706 | con->out_kvec_is_msg = true; |
| 707 | con->out_kvec[v].iov_base = &m->footer; |
| 708 | con->out_kvec[v].iov_len = sizeof(m->footer); |
| 709 | con->out_kvec_bytes += sizeof(m->footer); |
| 710 | con->out_kvec_left++; |
| 711 | con->out_more = m->more_to_follow; |
Sage Weil | c86a293 | 2009-12-14 14:04:30 -0800 | [diff] [blame] | 712 | con->out_msg_done = true; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 713 | } |
| 714 | |
| 715 | /* |
| 716 | * Prepare headers for the next outgoing message. |
| 717 | */ |
| 718 | static void prepare_write_message(struct ceph_connection *con) |
| 719 | { |
| 720 | struct ceph_msg *m; |
Alex Elder | a9a0c51 | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 721 | u32 crc; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 722 | |
Alex Elder | e220042 | 2012-05-23 14:35:23 -0500 | [diff] [blame] | 723 | con_out_kvec_reset(con); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 724 | con->out_kvec_is_msg = true; |
Sage Weil | c86a293 | 2009-12-14 14:04:30 -0800 | [diff] [blame] | 725 | con->out_msg_done = false; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 726 | |
| 727 | /* Sneak an ack in there first? If we can get it into the same |
| 728 | * TCP packet that's a good thing. */ |
| 729 | if (con->in_seq > con->in_seq_acked) { |
| 730 | con->in_seq_acked = con->in_seq; |
Alex Elder | e220042 | 2012-05-23 14:35:23 -0500 | [diff] [blame] | 731 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 732 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); |
Alex Elder | e220042 | 2012-05-23 14:35:23 -0500 | [diff] [blame] | 733 | con_out_kvec_add(con, sizeof (con->out_temp_ack), |
Alex Elder | 859eb79 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 734 | &con->out_temp_ack); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 735 | } |
| 736 | |
Alex Elder | 38941f8 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 737 | BUG_ON(list_empty(&con->out_queue)); |
Alex Elder | 859eb79 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 738 | m = list_first_entry(&con->out_queue, struct ceph_msg, list_head); |
Sage Weil | c86a293 | 2009-12-14 14:04:30 -0800 | [diff] [blame] | 739 | con->out_msg = m; |
Alex Elder | 38941f8 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 740 | BUG_ON(m->con != con); |
Sage Weil | 4cf9d54 | 2011-07-26 11:27:24 -0700 | [diff] [blame] | 741 | |
| 742 | /* put message on sent list */ |
| 743 | ceph_msg_get(m); |
| 744 | list_move_tail(&m->list_head, &con->out_sent); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 745 | |
Sage Weil | e84346b | 2010-05-11 21:20:38 -0700 | [diff] [blame] | 746 | /* |
| 747 | * only assign outgoing seq # if we haven't sent this message |
| 748 | * yet. if it is requeued, resend with it's original seq. |
| 749 | */ |
| 750 | if (m->needs_out_seq) { |
| 751 | m->hdr.seq = cpu_to_le64(++con->out_seq); |
| 752 | m->needs_out_seq = false; |
| 753 | } |
Yan, Zheng | b132cf4 | 2012-06-06 19:35:55 -0500 | [diff] [blame] | 754 | #ifdef CONFIG_BLOCK |
| 755 | else |
| 756 | m->bio_iter = NULL; |
| 757 | #endif |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 758 | |
| 759 | dout("prepare_write_message %p seq %lld type %d len %d+%d+%d %d pgs\n", |
| 760 | m, con->out_seq, le16_to_cpu(m->hdr.type), |
| 761 | le32_to_cpu(m->hdr.front_len), le32_to_cpu(m->hdr.middle_len), |
| 762 | le32_to_cpu(m->hdr.data_len), |
| 763 | m->nr_pages); |
| 764 | BUG_ON(le32_to_cpu(m->hdr.front_len) != m->front.iov_len); |
| 765 | |
| 766 | /* tag + hdr + front + middle */ |
Alex Elder | e220042 | 2012-05-23 14:35:23 -0500 | [diff] [blame] | 767 | con_out_kvec_add(con, sizeof (tag_msg), &tag_msg); |
| 768 | con_out_kvec_add(con, sizeof (m->hdr), &m->hdr); |
| 769 | con_out_kvec_add(con, m->front.iov_len, m->front.iov_base); |
Alex Elder | 859eb79 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 770 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 771 | if (m->middle) |
Alex Elder | e220042 | 2012-05-23 14:35:23 -0500 | [diff] [blame] | 772 | con_out_kvec_add(con, m->middle->vec.iov_len, |
Alex Elder | 859eb79 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 773 | m->middle->vec.iov_base); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 774 | |
| 775 | /* fill in crc (except data pages), footer */ |
Alex Elder | a9a0c51 | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 776 | crc = crc32c(0, &m->hdr, offsetof(struct ceph_msg_header, crc)); |
| 777 | con->out_msg->hdr.crc = cpu_to_le32(crc); |
Alex Elder | fd154f3 | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 778 | con->out_msg->footer.flags = 0; |
Alex Elder | a9a0c51 | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 779 | |
| 780 | crc = crc32c(0, m->front.iov_base, m->front.iov_len); |
| 781 | con->out_msg->footer.front_crc = cpu_to_le32(crc); |
| 782 | if (m->middle) { |
| 783 | crc = crc32c(0, m->middle->vec.iov_base, |
| 784 | m->middle->vec.iov_len); |
| 785 | con->out_msg->footer.middle_crc = cpu_to_le32(crc); |
| 786 | } else |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 787 | con->out_msg->footer.middle_crc = 0; |
Alex Elder | 739c905 | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 788 | dout("%s front_crc %u middle_crc %u\n", __func__, |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 789 | le32_to_cpu(con->out_msg->footer.front_crc), |
| 790 | le32_to_cpu(con->out_msg->footer.middle_crc)); |
| 791 | |
| 792 | /* is there a data payload? */ |
Alex Elder | 739c905 | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 793 | con->out_msg->footer.data_crc = 0; |
| 794 | if (m->hdr.data_len) |
| 795 | prepare_write_message_data(con); |
| 796 | else |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 797 | /* no, queue up footer too and be done */ |
Alex Elder | 859eb79 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 798 | prepare_write_message_footer(con); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 799 | |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 800 | set_bit(CON_FLAG_WRITE_PENDING, &con->flags); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 801 | } |
| 802 | |
| 803 | /* |
| 804 | * Prepare an ack. |
| 805 | */ |
| 806 | static void prepare_write_ack(struct ceph_connection *con) |
| 807 | { |
| 808 | dout("prepare_write_ack %p %llu -> %llu\n", con, |
| 809 | con->in_seq_acked, con->in_seq); |
| 810 | con->in_seq_acked = con->in_seq; |
| 811 | |
Alex Elder | e220042 | 2012-05-23 14:35:23 -0500 | [diff] [blame] | 812 | con_out_kvec_reset(con); |
Alex Elder | 859eb79 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 813 | |
Alex Elder | e220042 | 2012-05-23 14:35:23 -0500 | [diff] [blame] | 814 | con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); |
Alex Elder | 859eb79 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 815 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 816 | con->out_temp_ack = cpu_to_le64(con->in_seq_acked); |
Alex Elder | e220042 | 2012-05-23 14:35:23 -0500 | [diff] [blame] | 817 | con_out_kvec_add(con, sizeof (con->out_temp_ack), |
Alex Elder | 859eb79 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 818 | &con->out_temp_ack); |
| 819 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 820 | con->out_more = 1; /* more will follow.. eventually.. */ |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 821 | set_bit(CON_FLAG_WRITE_PENDING, &con->flags); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 822 | } |
| 823 | |
| 824 | /* |
| 825 | * Prepare to write keepalive byte. |
| 826 | */ |
| 827 | static void prepare_write_keepalive(struct ceph_connection *con) |
| 828 | { |
| 829 | dout("prepare_write_keepalive %p\n", con); |
Alex Elder | e220042 | 2012-05-23 14:35:23 -0500 | [diff] [blame] | 830 | con_out_kvec_reset(con); |
| 831 | con_out_kvec_add(con, sizeof (tag_keepalive), &tag_keepalive); |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 832 | set_bit(CON_FLAG_WRITE_PENDING, &con->flags); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 833 | } |
| 834 | |
| 835 | /* |
| 836 | * Connection negotiation. |
| 837 | */ |
| 838 | |
Alex Elder | dac1e71 | 2012-05-16 15:16:39 -0500 | [diff] [blame] | 839 | static struct ceph_auth_handshake *get_connect_authorizer(struct ceph_connection *con, |
| 840 | int *auth_proto) |
Sage Weil | 4e7a5dc | 2009-11-18 16:19:57 -0800 | [diff] [blame] | 841 | { |
Alex Elder | a3530df | 2012-05-16 15:16:39 -0500 | [diff] [blame] | 842 | struct ceph_auth_handshake *auth; |
Alex Elder | b1c6b98 | 2012-05-16 15:16:38 -0500 | [diff] [blame] | 843 | |
| 844 | if (!con->ops->get_authorizer) { |
| 845 | con->out_connect.authorizer_protocol = CEPH_AUTH_UNKNOWN; |
| 846 | con->out_connect.authorizer_len = 0; |
Alex Elder | 729796b | 2012-05-16 15:16:39 -0500 | [diff] [blame] | 847 | return NULL; |
Alex Elder | b1c6b98 | 2012-05-16 15:16:38 -0500 | [diff] [blame] | 848 | } |
| 849 | |
| 850 | /* Can't hold the mutex while getting authorizer */ |
Sage Weil | ec30264 | 2009-12-22 10:43:42 -0800 | [diff] [blame] | 851 | mutex_unlock(&con->mutex); |
Alex Elder | dac1e71 | 2012-05-16 15:16:39 -0500 | [diff] [blame] | 852 | auth = con->ops->get_authorizer(con, auth_proto, con->auth_retry); |
Sage Weil | ec30264 | 2009-12-22 10:43:42 -0800 | [diff] [blame] | 853 | mutex_lock(&con->mutex); |
Sage Weil | 4e7a5dc | 2009-11-18 16:19:57 -0800 | [diff] [blame] | 854 | |
Alex Elder | a3530df | 2012-05-16 15:16:39 -0500 | [diff] [blame] | 855 | if (IS_ERR(auth)) |
Alex Elder | 729796b | 2012-05-16 15:16:39 -0500 | [diff] [blame] | 856 | return auth; |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 857 | if (con->state != CON_STATE_NEGOTIATING) |
Alex Elder | 729796b | 2012-05-16 15:16:39 -0500 | [diff] [blame] | 858 | return ERR_PTR(-EAGAIN); |
Sage Weil | 0da5d70 | 2011-05-19 11:21:05 -0700 | [diff] [blame] | 859 | |
Alex Elder | 8f43fb5 | 2012-05-16 15:16:39 -0500 | [diff] [blame] | 860 | con->auth_reply_buf = auth->authorizer_reply_buf; |
| 861 | con->auth_reply_buf_len = auth->authorizer_reply_buf_len; |
Alex Elder | 729796b | 2012-05-16 15:16:39 -0500 | [diff] [blame] | 862 | return auth; |
Sage Weil | 4e7a5dc | 2009-11-18 16:19:57 -0800 | [diff] [blame] | 863 | } |
| 864 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 865 | /* |
| 866 | * We connected to a peer and are saying hello. |
| 867 | */ |
Alex Elder | e825a66 | 2012-05-16 15:16:38 -0500 | [diff] [blame] | 868 | static void prepare_write_banner(struct ceph_connection *con) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 869 | { |
Alex Elder | e220042 | 2012-05-23 14:35:23 -0500 | [diff] [blame] | 870 | con_out_kvec_add(con, strlen(CEPH_BANNER), CEPH_BANNER); |
| 871 | con_out_kvec_add(con, sizeof (con->msgr->my_enc_addr), |
Alex Elder | e825a66 | 2012-05-16 15:16:38 -0500 | [diff] [blame] | 872 | &con->msgr->my_enc_addr); |
Sage Weil | eed0ef2 | 2009-11-10 14:34:36 -0800 | [diff] [blame] | 873 | |
Sage Weil | eed0ef2 | 2009-11-10 14:34:36 -0800 | [diff] [blame] | 874 | con->out_more = 0; |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 875 | set_bit(CON_FLAG_WRITE_PENDING, &con->flags); |
Sage Weil | eed0ef2 | 2009-11-10 14:34:36 -0800 | [diff] [blame] | 876 | } |
| 877 | |
Alex Elder | e825a66 | 2012-05-16 15:16:38 -0500 | [diff] [blame] | 878 | static int prepare_write_connect(struct ceph_connection *con) |
Sage Weil | eed0ef2 | 2009-11-10 14:34:36 -0800 | [diff] [blame] | 879 | { |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 880 | unsigned int global_seq = get_global_seq(con->msgr, 0); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 881 | int proto; |
Alex Elder | dac1e71 | 2012-05-16 15:16:39 -0500 | [diff] [blame] | 882 | int auth_proto; |
Alex Elder | 729796b | 2012-05-16 15:16:39 -0500 | [diff] [blame] | 883 | struct ceph_auth_handshake *auth; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 884 | |
| 885 | switch (con->peer_name.type) { |
| 886 | case CEPH_ENTITY_TYPE_MON: |
| 887 | proto = CEPH_MONC_PROTOCOL; |
| 888 | break; |
| 889 | case CEPH_ENTITY_TYPE_OSD: |
| 890 | proto = CEPH_OSDC_PROTOCOL; |
| 891 | break; |
| 892 | case CEPH_ENTITY_TYPE_MDS: |
| 893 | proto = CEPH_MDSC_PROTOCOL; |
| 894 | break; |
| 895 | default: |
| 896 | BUG(); |
| 897 | } |
| 898 | |
| 899 | dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con, |
| 900 | con->connect_seq, global_seq, proto); |
Sage Weil | 4e7a5dc | 2009-11-18 16:19:57 -0800 | [diff] [blame] | 901 | |
Alex Elder | e825a66 | 2012-05-16 15:16:38 -0500 | [diff] [blame] | 902 | con->out_connect.features = cpu_to_le64(con->msgr->supported_features); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 903 | con->out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT); |
| 904 | con->out_connect.connect_seq = cpu_to_le32(con->connect_seq); |
| 905 | con->out_connect.global_seq = cpu_to_le32(global_seq); |
| 906 | con->out_connect.protocol_version = cpu_to_le32(proto); |
| 907 | con->out_connect.flags = 0; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 908 | |
Alex Elder | dac1e71 | 2012-05-16 15:16:39 -0500 | [diff] [blame] | 909 | auth_proto = CEPH_AUTH_UNKNOWN; |
| 910 | auth = get_connect_authorizer(con, &auth_proto); |
Alex Elder | 729796b | 2012-05-16 15:16:39 -0500 | [diff] [blame] | 911 | if (IS_ERR(auth)) |
| 912 | return PTR_ERR(auth); |
Alex Elder | 3da5477 | 2012-05-16 15:16:39 -0500 | [diff] [blame] | 913 | |
Alex Elder | dac1e71 | 2012-05-16 15:16:39 -0500 | [diff] [blame] | 914 | con->out_connect.authorizer_protocol = cpu_to_le32(auth_proto); |
Alex Elder | 3da5477 | 2012-05-16 15:16:39 -0500 | [diff] [blame] | 915 | con->out_connect.authorizer_len = auth ? |
| 916 | cpu_to_le32(auth->authorizer_buf_len) : 0; |
| 917 | |
Alex Elder | e220042 | 2012-05-23 14:35:23 -0500 | [diff] [blame] | 918 | con_out_kvec_add(con, sizeof (con->out_connect), |
Alex Elder | 3da5477 | 2012-05-16 15:16:39 -0500 | [diff] [blame] | 919 | &con->out_connect); |
| 920 | if (auth && auth->authorizer_buf_len) |
Alex Elder | e220042 | 2012-05-23 14:35:23 -0500 | [diff] [blame] | 921 | con_out_kvec_add(con, auth->authorizer_buf_len, |
Alex Elder | 3da5477 | 2012-05-16 15:16:39 -0500 | [diff] [blame] | 922 | auth->authorizer_buf); |
Alex Elder | 859eb79 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 923 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 924 | con->out_more = 0; |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 925 | set_bit(CON_FLAG_WRITE_PENDING, &con->flags); |
Sage Weil | 4e7a5dc | 2009-11-18 16:19:57 -0800 | [diff] [blame] | 926 | |
Alex Elder | e10c758 | 2012-05-16 15:16:38 -0500 | [diff] [blame] | 927 | return 0; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 928 | } |
| 929 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 930 | /* |
| 931 | * write as much of pending kvecs to the socket as we can. |
| 932 | * 1 -> done |
| 933 | * 0 -> socket full, but more to do |
| 934 | * <0 -> error |
| 935 | */ |
| 936 | static int write_partial_kvec(struct ceph_connection *con) |
| 937 | { |
| 938 | int ret; |
| 939 | |
| 940 | dout("write_partial_kvec %p %d left\n", con, con->out_kvec_bytes); |
| 941 | while (con->out_kvec_bytes > 0) { |
| 942 | ret = ceph_tcp_sendmsg(con->sock, con->out_kvec_cur, |
| 943 | con->out_kvec_left, con->out_kvec_bytes, |
| 944 | con->out_more); |
| 945 | if (ret <= 0) |
| 946 | goto out; |
| 947 | con->out_kvec_bytes -= ret; |
| 948 | if (con->out_kvec_bytes == 0) |
| 949 | break; /* done */ |
Alex Elder | f42299e | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 950 | |
| 951 | /* account for full iov entries consumed */ |
| 952 | while (ret >= con->out_kvec_cur->iov_len) { |
| 953 | BUG_ON(!con->out_kvec_left); |
| 954 | ret -= con->out_kvec_cur->iov_len; |
| 955 | con->out_kvec_cur++; |
| 956 | con->out_kvec_left--; |
| 957 | } |
| 958 | /* and for a partially-consumed entry */ |
| 959 | if (ret) { |
| 960 | con->out_kvec_cur->iov_len -= ret; |
| 961 | con->out_kvec_cur->iov_base += ret; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 962 | } |
| 963 | } |
| 964 | con->out_kvec_left = 0; |
| 965 | con->out_kvec_is_msg = false; |
| 966 | ret = 1; |
| 967 | out: |
| 968 | dout("write_partial_kvec %p %d left in %d kvecs ret = %d\n", con, |
| 969 | con->out_kvec_bytes, con->out_kvec_left, ret); |
| 970 | return ret; /* done! */ |
| 971 | } |
| 972 | |
Alex Elder | 84ca8fc | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 973 | static void out_msg_pos_next(struct ceph_connection *con, struct page *page, |
| 974 | size_t len, size_t sent, bool in_trail) |
| 975 | { |
| 976 | struct ceph_msg *msg = con->out_msg; |
| 977 | |
| 978 | BUG_ON(!msg); |
| 979 | BUG_ON(!sent); |
| 980 | |
| 981 | con->out_msg_pos.data_pos += sent; |
| 982 | con->out_msg_pos.page_pos += sent; |
Alex Elder | 5821bd8 | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 983 | if (sent < len) |
| 984 | return; |
| 985 | |
| 986 | BUG_ON(sent != len); |
| 987 | con->out_msg_pos.page_pos = 0; |
| 988 | con->out_msg_pos.page++; |
| 989 | con->out_msg_pos.did_page_crc = false; |
| 990 | if (in_trail) |
| 991 | list_move_tail(&page->lru, |
| 992 | &msg->trail->head); |
| 993 | else if (msg->pagelist) |
| 994 | list_move_tail(&page->lru, |
| 995 | &msg->pagelist->head); |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 996 | #ifdef CONFIG_BLOCK |
Alex Elder | 5821bd8 | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 997 | else if (msg->bio) |
| 998 | iter_bio_next(&msg->bio_iter, &msg->bio_seg); |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 999 | #endif |
Alex Elder | 84ca8fc | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 1000 | } |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1001 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1002 | /* |
| 1003 | * Write as much message data payload as we can. If we finish, queue |
| 1004 | * up the footer. |
| 1005 | * 1 -> done, footer is now queued in out_kvec[]. |
| 1006 | * 0 -> socket full, but more to do |
| 1007 | * <0 -> error |
| 1008 | */ |
| 1009 | static int write_partial_msg_pages(struct ceph_connection *con) |
| 1010 | { |
| 1011 | struct ceph_msg *msg = con->out_msg; |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1012 | unsigned int data_len = le32_to_cpu(msg->hdr.data_len); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1013 | size_t len; |
Alex Elder | 37675b0 | 2012-03-07 11:40:08 -0600 | [diff] [blame] | 1014 | bool do_datacrc = !con->msgr->nocrc; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1015 | int ret; |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1016 | int total_max_write; |
Alex Elder | 84ca8fc | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 1017 | bool in_trail = false; |
Alex Elder | 5821bd8 | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 1018 | const size_t trail_len = (msg->trail ? msg->trail->length : 0); |
| 1019 | const size_t trail_off = data_len - trail_len; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1020 | |
| 1021 | dout("write_partial_msg_pages %p msg %p page %d/%d offset %d\n", |
Alex Elder | 84ca8fc | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 1022 | con, msg, con->out_msg_pos.page, msg->nr_pages, |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1023 | con->out_msg_pos.page_pos); |
| 1024 | |
Alex Elder | 5821bd8 | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 1025 | /* |
| 1026 | * Iterate through each page that contains data to be |
| 1027 | * written, and send as much as possible for each. |
| 1028 | * |
| 1029 | * If we are calculating the data crc (the default), we will |
| 1030 | * need to map the page. If we have no pages, they have |
| 1031 | * been revoked, so use the zero page. |
| 1032 | */ |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1033 | while (data_len > con->out_msg_pos.data_pos) { |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1034 | struct page *page = NULL; |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1035 | int max_write = PAGE_SIZE; |
Alex Elder | 9bd1966 | 2012-03-07 11:40:08 -0600 | [diff] [blame] | 1036 | int bio_offset = 0; |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1037 | |
Alex Elder | 5821bd8 | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 1038 | in_trail = in_trail || con->out_msg_pos.data_pos >= trail_off; |
| 1039 | if (!in_trail) |
| 1040 | total_max_write = trail_off - con->out_msg_pos.data_pos; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1041 | |
Alex Elder | 5821bd8 | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 1042 | if (in_trail) { |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1043 | total_max_write = data_len - con->out_msg_pos.data_pos; |
| 1044 | |
| 1045 | page = list_first_entry(&msg->trail->head, |
| 1046 | struct page, lru); |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1047 | } else if (msg->pages) { |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1048 | page = msg->pages[con->out_msg_pos.page]; |
Sage Weil | 58bb3b3 | 2009-12-23 12:12:31 -0800 | [diff] [blame] | 1049 | } else if (msg->pagelist) { |
| 1050 | page = list_first_entry(&msg->pagelist->head, |
| 1051 | struct page, lru); |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1052 | #ifdef CONFIG_BLOCK |
| 1053 | } else if (msg->bio) { |
| 1054 | struct bio_vec *bv; |
| 1055 | |
| 1056 | bv = bio_iovec_idx(msg->bio_iter, msg->bio_seg); |
| 1057 | page = bv->bv_page; |
Alex Elder | 9bd1966 | 2012-03-07 11:40:08 -0600 | [diff] [blame] | 1058 | bio_offset = bv->bv_offset; |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1059 | max_write = bv->bv_len; |
| 1060 | #endif |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1061 | } else { |
Alex Elder | 5766651 | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 1062 | page = zero_page; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1063 | } |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1064 | len = min_t(int, max_write - con->out_msg_pos.page_pos, |
| 1065 | total_max_write); |
| 1066 | |
Alex Elder | 37675b0 | 2012-03-07 11:40:08 -0600 | [diff] [blame] | 1067 | if (do_datacrc && !con->out_msg_pos.did_page_crc) { |
Alex Elder | 9bd1966 | 2012-03-07 11:40:08 -0600 | [diff] [blame] | 1068 | void *base; |
Alex Elder | 5821bd8 | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 1069 | u32 crc = le32_to_cpu(msg->footer.data_crc); |
Alex Elder | 8d63e31 | 2012-03-07 11:40:08 -0600 | [diff] [blame] | 1070 | char *kaddr; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1071 | |
Alex Elder | 8d63e31 | 2012-03-07 11:40:08 -0600 | [diff] [blame] | 1072 | kaddr = kmap(page); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1073 | BUG_ON(kaddr == NULL); |
Alex Elder | 9bd1966 | 2012-03-07 11:40:08 -0600 | [diff] [blame] | 1074 | base = kaddr + con->out_msg_pos.page_pos + bio_offset; |
Alex Elder | 5821bd8 | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 1075 | crc = crc32c(crc, base, len); |
Alex Elder | 5ce765a | 2012-09-21 17:59:58 -0500 | [diff] [blame] | 1076 | kunmap(page); |
Alex Elder | 84ca8fc | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 1077 | msg->footer.data_crc = cpu_to_le32(crc); |
Alex Elder | bca064d | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 1078 | con->out_msg_pos.did_page_crc = true; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1079 | } |
Alex Elder | e36b13c | 2012-03-07 11:40:08 -0600 | [diff] [blame] | 1080 | ret = ceph_tcp_sendpage(con->sock, page, |
Alex Elder | 9bd1966 | 2012-03-07 11:40:08 -0600 | [diff] [blame] | 1081 | con->out_msg_pos.page_pos + bio_offset, |
Alex Elder | e36b13c | 2012-03-07 11:40:08 -0600 | [diff] [blame] | 1082 | len, 1); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1083 | if (ret <= 0) |
| 1084 | goto out; |
| 1085 | |
Alex Elder | 84ca8fc | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 1086 | out_msg_pos_next(con, page, len, (size_t) ret, in_trail); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1087 | } |
| 1088 | |
| 1089 | dout("write_partial_msg_pages %p msg %p done\n", con, msg); |
| 1090 | |
| 1091 | /* prepare and queue up footer, too */ |
Alex Elder | 37675b0 | 2012-03-07 11:40:08 -0600 | [diff] [blame] | 1092 | if (!do_datacrc) |
Alex Elder | 84ca8fc | 2012-06-11 14:57:13 -0500 | [diff] [blame] | 1093 | msg->footer.flags |= CEPH_MSG_FOOTER_NOCRC; |
Alex Elder | e220042 | 2012-05-23 14:35:23 -0500 | [diff] [blame] | 1094 | con_out_kvec_reset(con); |
Alex Elder | 859eb79 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 1095 | prepare_write_message_footer(con); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1096 | ret = 1; |
| 1097 | out: |
| 1098 | return ret; |
| 1099 | } |
| 1100 | |
| 1101 | /* |
| 1102 | * write some zeros |
| 1103 | */ |
| 1104 | static int write_partial_skip(struct ceph_connection *con) |
| 1105 | { |
| 1106 | int ret; |
| 1107 | |
| 1108 | while (con->out_skip > 0) { |
Alex Elder | 3173913 | 2012-03-07 11:40:08 -0600 | [diff] [blame] | 1109 | size_t size = min(con->out_skip, (int) PAGE_CACHE_SIZE); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1110 | |
Alex Elder | 3173913 | 2012-03-07 11:40:08 -0600 | [diff] [blame] | 1111 | ret = ceph_tcp_sendpage(con->sock, zero_page, 0, size, 1); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1112 | if (ret <= 0) |
| 1113 | goto out; |
| 1114 | con->out_skip -= ret; |
| 1115 | } |
| 1116 | ret = 1; |
| 1117 | out: |
| 1118 | return ret; |
| 1119 | } |
| 1120 | |
| 1121 | /* |
| 1122 | * Prepare to read connection handshake, or an ack. |
| 1123 | */ |
Sage Weil | eed0ef2 | 2009-11-10 14:34:36 -0800 | [diff] [blame] | 1124 | static void prepare_read_banner(struct ceph_connection *con) |
| 1125 | { |
| 1126 | dout("prepare_read_banner %p\n", con); |
| 1127 | con->in_base_pos = 0; |
| 1128 | } |
| 1129 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1130 | static void prepare_read_connect(struct ceph_connection *con) |
| 1131 | { |
| 1132 | dout("prepare_read_connect %p\n", con); |
| 1133 | con->in_base_pos = 0; |
| 1134 | } |
| 1135 | |
| 1136 | static void prepare_read_ack(struct ceph_connection *con) |
| 1137 | { |
| 1138 | dout("prepare_read_ack %p\n", con); |
| 1139 | con->in_base_pos = 0; |
| 1140 | } |
| 1141 | |
| 1142 | static void prepare_read_tag(struct ceph_connection *con) |
| 1143 | { |
| 1144 | dout("prepare_read_tag %p\n", con); |
| 1145 | con->in_base_pos = 0; |
| 1146 | con->in_tag = CEPH_MSGR_TAG_READY; |
| 1147 | } |
| 1148 | |
| 1149 | /* |
| 1150 | * Prepare to read a message. |
| 1151 | */ |
| 1152 | static int prepare_read_message(struct ceph_connection *con) |
| 1153 | { |
| 1154 | dout("prepare_read_message %p\n", con); |
| 1155 | BUG_ON(con->in_msg != NULL); |
| 1156 | con->in_base_pos = 0; |
| 1157 | con->in_front_crc = con->in_middle_crc = con->in_data_crc = 0; |
| 1158 | return 0; |
| 1159 | } |
| 1160 | |
| 1161 | |
| 1162 | static int read_partial(struct ceph_connection *con, |
Alex Elder | fd51653 | 2012-05-10 10:29:50 -0500 | [diff] [blame] | 1163 | int end, int size, void *object) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1164 | { |
Alex Elder | e6cee71 | 2012-05-10 10:29:50 -0500 | [diff] [blame] | 1165 | while (con->in_base_pos < end) { |
| 1166 | int left = end - con->in_base_pos; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1167 | int have = size - left; |
| 1168 | int ret = ceph_tcp_recvmsg(con->sock, object + have, left); |
| 1169 | if (ret <= 0) |
| 1170 | return ret; |
| 1171 | con->in_base_pos += ret; |
| 1172 | } |
| 1173 | return 1; |
| 1174 | } |
| 1175 | |
| 1176 | |
| 1177 | /* |
| 1178 | * Read all or part of the connect-side handshake on a new connection |
| 1179 | */ |
Sage Weil | eed0ef2 | 2009-11-10 14:34:36 -0800 | [diff] [blame] | 1180 | static int read_partial_banner(struct ceph_connection *con) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1181 | { |
Alex Elder | fd51653 | 2012-05-10 10:29:50 -0500 | [diff] [blame] | 1182 | int size; |
| 1183 | int end; |
| 1184 | int ret; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1185 | |
Sage Weil | eed0ef2 | 2009-11-10 14:34:36 -0800 | [diff] [blame] | 1186 | dout("read_partial_banner %p at %d\n", con, con->in_base_pos); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1187 | |
| 1188 | /* peer's banner */ |
Alex Elder | fd51653 | 2012-05-10 10:29:50 -0500 | [diff] [blame] | 1189 | size = strlen(CEPH_BANNER); |
| 1190 | end = size; |
| 1191 | ret = read_partial(con, end, size, con->in_banner); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1192 | if (ret <= 0) |
| 1193 | goto out; |
Alex Elder | fd51653 | 2012-05-10 10:29:50 -0500 | [diff] [blame] | 1194 | |
| 1195 | size = sizeof (con->actual_peer_addr); |
| 1196 | end += size; |
| 1197 | ret = read_partial(con, end, size, &con->actual_peer_addr); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1198 | if (ret <= 0) |
| 1199 | goto out; |
Alex Elder | fd51653 | 2012-05-10 10:29:50 -0500 | [diff] [blame] | 1200 | |
| 1201 | size = sizeof (con->peer_addr_for_me); |
| 1202 | end += size; |
| 1203 | ret = read_partial(con, end, size, &con->peer_addr_for_me); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1204 | if (ret <= 0) |
| 1205 | goto out; |
Alex Elder | fd51653 | 2012-05-10 10:29:50 -0500 | [diff] [blame] | 1206 | |
Sage Weil | eed0ef2 | 2009-11-10 14:34:36 -0800 | [diff] [blame] | 1207 | out: |
| 1208 | return ret; |
| 1209 | } |
| 1210 | |
| 1211 | static int read_partial_connect(struct ceph_connection *con) |
| 1212 | { |
Alex Elder | fd51653 | 2012-05-10 10:29:50 -0500 | [diff] [blame] | 1213 | int size; |
| 1214 | int end; |
| 1215 | int ret; |
Sage Weil | eed0ef2 | 2009-11-10 14:34:36 -0800 | [diff] [blame] | 1216 | |
| 1217 | dout("read_partial_connect %p at %d\n", con, con->in_base_pos); |
| 1218 | |
Alex Elder | fd51653 | 2012-05-10 10:29:50 -0500 | [diff] [blame] | 1219 | size = sizeof (con->in_reply); |
| 1220 | end = size; |
| 1221 | ret = read_partial(con, end, size, &con->in_reply); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1222 | if (ret <= 0) |
| 1223 | goto out; |
Alex Elder | fd51653 | 2012-05-10 10:29:50 -0500 | [diff] [blame] | 1224 | |
| 1225 | size = le32_to_cpu(con->in_reply.authorizer_len); |
| 1226 | end += size; |
| 1227 | ret = read_partial(con, end, size, con->auth_reply_buf); |
Sage Weil | 4e7a5dc | 2009-11-18 16:19:57 -0800 | [diff] [blame] | 1228 | if (ret <= 0) |
| 1229 | goto out; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1230 | |
Sage Weil | 4e7a5dc | 2009-11-18 16:19:57 -0800 | [diff] [blame] | 1231 | dout("read_partial_connect %p tag %d, con_seq = %u, g_seq = %u\n", |
| 1232 | con, (int)con->in_reply.tag, |
| 1233 | le32_to_cpu(con->in_reply.connect_seq), |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1234 | le32_to_cpu(con->in_reply.global_seq)); |
| 1235 | out: |
| 1236 | return ret; |
Sage Weil | eed0ef2 | 2009-11-10 14:34:36 -0800 | [diff] [blame] | 1237 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1238 | } |
| 1239 | |
| 1240 | /* |
| 1241 | * Verify the hello banner looks okay. |
| 1242 | */ |
| 1243 | static int verify_hello(struct ceph_connection *con) |
| 1244 | { |
| 1245 | if (memcmp(con->in_banner, CEPH_BANNER, strlen(CEPH_BANNER))) { |
Sage Weil | 13e38c8 | 2009-10-09 16:36:34 -0700 | [diff] [blame] | 1246 | pr_err("connect to %s got bad banner\n", |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1247 | ceph_pr_addr(&con->peer_addr.in_addr)); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1248 | con->error_msg = "protocol error, bad banner"; |
| 1249 | return -1; |
| 1250 | } |
| 1251 | return 0; |
| 1252 | } |
| 1253 | |
| 1254 | static bool addr_is_blank(struct sockaddr_storage *ss) |
| 1255 | { |
| 1256 | switch (ss->ss_family) { |
| 1257 | case AF_INET: |
| 1258 | return ((struct sockaddr_in *)ss)->sin_addr.s_addr == 0; |
| 1259 | case AF_INET6: |
| 1260 | return |
| 1261 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[0] == 0 && |
| 1262 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[1] == 0 && |
| 1263 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[2] == 0 && |
| 1264 | ((struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[3] == 0; |
| 1265 | } |
| 1266 | return false; |
| 1267 | } |
| 1268 | |
| 1269 | static int addr_port(struct sockaddr_storage *ss) |
| 1270 | { |
| 1271 | switch (ss->ss_family) { |
| 1272 | case AF_INET: |
Sage Weil | f28bcfb | 2009-11-04 11:46:35 -0800 | [diff] [blame] | 1273 | return ntohs(((struct sockaddr_in *)ss)->sin_port); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1274 | case AF_INET6: |
Sage Weil | f28bcfb | 2009-11-04 11:46:35 -0800 | [diff] [blame] | 1275 | return ntohs(((struct sockaddr_in6 *)ss)->sin6_port); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1276 | } |
| 1277 | return 0; |
| 1278 | } |
| 1279 | |
| 1280 | static void addr_set_port(struct sockaddr_storage *ss, int p) |
| 1281 | { |
| 1282 | switch (ss->ss_family) { |
| 1283 | case AF_INET: |
| 1284 | ((struct sockaddr_in *)ss)->sin_port = htons(p); |
Sage Weil | a2a7960 | 2011-05-12 15:34:24 -0700 | [diff] [blame] | 1285 | break; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1286 | case AF_INET6: |
| 1287 | ((struct sockaddr_in6 *)ss)->sin6_port = htons(p); |
Sage Weil | a2a7960 | 2011-05-12 15:34:24 -0700 | [diff] [blame] | 1288 | break; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1289 | } |
| 1290 | } |
| 1291 | |
| 1292 | /* |
Noah Watkins | ee3b56f | 2011-09-23 11:48:42 -0700 | [diff] [blame] | 1293 | * Unlike other *_pton function semantics, zero indicates success. |
| 1294 | */ |
| 1295 | static int ceph_pton(const char *str, size_t len, struct sockaddr_storage *ss, |
| 1296 | char delim, const char **ipend) |
| 1297 | { |
Alex Elder | 99f0f3b | 2012-01-23 15:49:27 -0600 | [diff] [blame] | 1298 | struct sockaddr_in *in4 = (struct sockaddr_in *) ss; |
| 1299 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *) ss; |
Noah Watkins | ee3b56f | 2011-09-23 11:48:42 -0700 | [diff] [blame] | 1300 | |
| 1301 | memset(ss, 0, sizeof(*ss)); |
| 1302 | |
| 1303 | if (in4_pton(str, len, (u8 *)&in4->sin_addr.s_addr, delim, ipend)) { |
| 1304 | ss->ss_family = AF_INET; |
| 1305 | return 0; |
| 1306 | } |
| 1307 | |
| 1308 | if (in6_pton(str, len, (u8 *)&in6->sin6_addr.s6_addr, delim, ipend)) { |
| 1309 | ss->ss_family = AF_INET6; |
| 1310 | return 0; |
| 1311 | } |
| 1312 | |
| 1313 | return -EINVAL; |
| 1314 | } |
| 1315 | |
| 1316 | /* |
| 1317 | * Extract hostname string and resolve using kernel DNS facility. |
| 1318 | */ |
| 1319 | #ifdef CONFIG_CEPH_LIB_USE_DNS_RESOLVER |
| 1320 | static int ceph_dns_resolve_name(const char *name, size_t namelen, |
| 1321 | struct sockaddr_storage *ss, char delim, const char **ipend) |
| 1322 | { |
| 1323 | const char *end, *delim_p; |
| 1324 | char *colon_p, *ip_addr = NULL; |
| 1325 | int ip_len, ret; |
| 1326 | |
| 1327 | /* |
| 1328 | * The end of the hostname occurs immediately preceding the delimiter or |
| 1329 | * the port marker (':') where the delimiter takes precedence. |
| 1330 | */ |
| 1331 | delim_p = memchr(name, delim, namelen); |
| 1332 | colon_p = memchr(name, ':', namelen); |
| 1333 | |
| 1334 | if (delim_p && colon_p) |
| 1335 | end = delim_p < colon_p ? delim_p : colon_p; |
| 1336 | else if (!delim_p && colon_p) |
| 1337 | end = colon_p; |
| 1338 | else { |
| 1339 | end = delim_p; |
| 1340 | if (!end) /* case: hostname:/ */ |
| 1341 | end = name + namelen; |
| 1342 | } |
| 1343 | |
| 1344 | if (end <= name) |
| 1345 | return -EINVAL; |
| 1346 | |
| 1347 | /* do dns_resolve upcall */ |
| 1348 | ip_len = dns_query(NULL, name, end - name, NULL, &ip_addr, NULL); |
| 1349 | if (ip_len > 0) |
| 1350 | ret = ceph_pton(ip_addr, ip_len, ss, -1, NULL); |
| 1351 | else |
| 1352 | ret = -ESRCH; |
| 1353 | |
| 1354 | kfree(ip_addr); |
| 1355 | |
| 1356 | *ipend = end; |
| 1357 | |
| 1358 | pr_info("resolve '%.*s' (ret=%d): %s\n", (int)(end - name), name, |
| 1359 | ret, ret ? "failed" : ceph_pr_addr(ss)); |
| 1360 | |
| 1361 | return ret; |
| 1362 | } |
| 1363 | #else |
| 1364 | static inline int ceph_dns_resolve_name(const char *name, size_t namelen, |
| 1365 | struct sockaddr_storage *ss, char delim, const char **ipend) |
| 1366 | { |
| 1367 | return -EINVAL; |
| 1368 | } |
| 1369 | #endif |
| 1370 | |
| 1371 | /* |
| 1372 | * Parse a server name (IP or hostname). If a valid IP address is not found |
| 1373 | * then try to extract a hostname to resolve using userspace DNS upcall. |
| 1374 | */ |
| 1375 | static int ceph_parse_server_name(const char *name, size_t namelen, |
| 1376 | struct sockaddr_storage *ss, char delim, const char **ipend) |
| 1377 | { |
| 1378 | int ret; |
| 1379 | |
| 1380 | ret = ceph_pton(name, namelen, ss, delim, ipend); |
| 1381 | if (ret) |
| 1382 | ret = ceph_dns_resolve_name(name, namelen, ss, delim, ipend); |
| 1383 | |
| 1384 | return ret; |
| 1385 | } |
| 1386 | |
| 1387 | /* |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1388 | * Parse an ip[:port] list into an addr array. Use the default |
| 1389 | * monitor port if a port isn't specified. |
| 1390 | */ |
| 1391 | int ceph_parse_ips(const char *c, const char *end, |
| 1392 | struct ceph_entity_addr *addr, |
| 1393 | int max_count, int *count) |
| 1394 | { |
Noah Watkins | ee3b56f | 2011-09-23 11:48:42 -0700 | [diff] [blame] | 1395 | int i, ret = -EINVAL; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1396 | const char *p = c; |
| 1397 | |
| 1398 | dout("parse_ips on '%.*s'\n", (int)(end-c), c); |
| 1399 | for (i = 0; i < max_count; i++) { |
| 1400 | const char *ipend; |
| 1401 | struct sockaddr_storage *ss = &addr[i].in_addr; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1402 | int port; |
Sage Weil | 39139f6 | 2010-07-08 09:54:52 -0700 | [diff] [blame] | 1403 | char delim = ','; |
| 1404 | |
| 1405 | if (*p == '[') { |
| 1406 | delim = ']'; |
| 1407 | p++; |
| 1408 | } |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1409 | |
Noah Watkins | ee3b56f | 2011-09-23 11:48:42 -0700 | [diff] [blame] | 1410 | ret = ceph_parse_server_name(p, end - p, ss, delim, &ipend); |
| 1411 | if (ret) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1412 | goto bad; |
Noah Watkins | ee3b56f | 2011-09-23 11:48:42 -0700 | [diff] [blame] | 1413 | ret = -EINVAL; |
| 1414 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1415 | p = ipend; |
| 1416 | |
Sage Weil | 39139f6 | 2010-07-08 09:54:52 -0700 | [diff] [blame] | 1417 | if (delim == ']') { |
| 1418 | if (*p != ']') { |
| 1419 | dout("missing matching ']'\n"); |
| 1420 | goto bad; |
| 1421 | } |
| 1422 | p++; |
| 1423 | } |
| 1424 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1425 | /* port? */ |
| 1426 | if (p < end && *p == ':') { |
| 1427 | port = 0; |
| 1428 | p++; |
| 1429 | while (p < end && *p >= '0' && *p <= '9') { |
| 1430 | port = (port * 10) + (*p - '0'); |
| 1431 | p++; |
| 1432 | } |
| 1433 | if (port > 65535 || port == 0) |
| 1434 | goto bad; |
| 1435 | } else { |
| 1436 | port = CEPH_MON_PORT; |
| 1437 | } |
| 1438 | |
| 1439 | addr_set_port(ss, port); |
| 1440 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1441 | dout("parse_ips got %s\n", ceph_pr_addr(ss)); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1442 | |
| 1443 | if (p == end) |
| 1444 | break; |
| 1445 | if (*p != ',') |
| 1446 | goto bad; |
| 1447 | p++; |
| 1448 | } |
| 1449 | |
| 1450 | if (p != end) |
| 1451 | goto bad; |
| 1452 | |
| 1453 | if (count) |
| 1454 | *count = i + 1; |
| 1455 | return 0; |
| 1456 | |
| 1457 | bad: |
Sage Weil | 39139f6 | 2010-07-08 09:54:52 -0700 | [diff] [blame] | 1458 | pr_err("parse_ips bad ip '%.*s'\n", (int)(end - c), c); |
Noah Watkins | ee3b56f | 2011-09-23 11:48:42 -0700 | [diff] [blame] | 1459 | return ret; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1460 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1461 | EXPORT_SYMBOL(ceph_parse_ips); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1462 | |
Sage Weil | eed0ef2 | 2009-11-10 14:34:36 -0800 | [diff] [blame] | 1463 | static int process_banner(struct ceph_connection *con) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1464 | { |
Sage Weil | eed0ef2 | 2009-11-10 14:34:36 -0800 | [diff] [blame] | 1465 | dout("process_banner on %p\n", con); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1466 | |
| 1467 | if (verify_hello(con) < 0) |
| 1468 | return -1; |
| 1469 | |
Sage Weil | 63f2d21 | 2009-11-03 15:17:56 -0800 | [diff] [blame] | 1470 | ceph_decode_addr(&con->actual_peer_addr); |
| 1471 | ceph_decode_addr(&con->peer_addr_for_me); |
| 1472 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1473 | /* |
| 1474 | * Make sure the other end is who we wanted. note that the other |
| 1475 | * end may not yet know their ip address, so if it's 0.0.0.0, give |
| 1476 | * them the benefit of the doubt. |
| 1477 | */ |
Sage Weil | 103e2d3 | 2010-01-07 16:12:36 -0800 | [diff] [blame] | 1478 | if (memcmp(&con->peer_addr, &con->actual_peer_addr, |
| 1479 | sizeof(con->peer_addr)) != 0 && |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1480 | !(addr_is_blank(&con->actual_peer_addr.in_addr) && |
| 1481 | con->actual_peer_addr.nonce == con->peer_addr.nonce)) { |
Yehuda Sadeh | cd84db6 | 2010-06-11 16:58:48 -0700 | [diff] [blame] | 1482 | pr_warning("wrong peer, want %s/%d, got %s/%d\n", |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1483 | ceph_pr_addr(&con->peer_addr.in_addr), |
Yehuda Sadeh | cd84db6 | 2010-06-11 16:58:48 -0700 | [diff] [blame] | 1484 | (int)le32_to_cpu(con->peer_addr.nonce), |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1485 | ceph_pr_addr(&con->actual_peer_addr.in_addr), |
Yehuda Sadeh | cd84db6 | 2010-06-11 16:58:48 -0700 | [diff] [blame] | 1486 | (int)le32_to_cpu(con->actual_peer_addr.nonce)); |
Sage Weil | 58bb3b3 | 2009-12-23 12:12:31 -0800 | [diff] [blame] | 1487 | con->error_msg = "wrong peer at address"; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1488 | return -1; |
| 1489 | } |
| 1490 | |
| 1491 | /* |
| 1492 | * did we learn our address? |
| 1493 | */ |
| 1494 | if (addr_is_blank(&con->msgr->inst.addr.in_addr)) { |
| 1495 | int port = addr_port(&con->msgr->inst.addr.in_addr); |
| 1496 | |
| 1497 | memcpy(&con->msgr->inst.addr.in_addr, |
| 1498 | &con->peer_addr_for_me.in_addr, |
| 1499 | sizeof(con->peer_addr_for_me.in_addr)); |
| 1500 | addr_set_port(&con->msgr->inst.addr.in_addr, port); |
Sage Weil | 63f2d21 | 2009-11-03 15:17:56 -0800 | [diff] [blame] | 1501 | encode_my_addr(con->msgr); |
Sage Weil | eed0ef2 | 2009-11-10 14:34:36 -0800 | [diff] [blame] | 1502 | dout("process_banner learned my addr is %s\n", |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1503 | ceph_pr_addr(&con->msgr->inst.addr.in_addr)); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1504 | } |
| 1505 | |
Sage Weil | eed0ef2 | 2009-11-10 14:34:36 -0800 | [diff] [blame] | 1506 | return 0; |
| 1507 | } |
| 1508 | |
Sage Weil | 04a419f | 2009-12-23 09:30:21 -0800 | [diff] [blame] | 1509 | static void fail_protocol(struct ceph_connection *con) |
| 1510 | { |
| 1511 | reset_connection(con); |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 1512 | BUG_ON(con->state != CON_STATE_NEGOTIATING); |
| 1513 | con->state = CON_STATE_CLOSED; |
Sage Weil | 04a419f | 2009-12-23 09:30:21 -0800 | [diff] [blame] | 1514 | } |
| 1515 | |
Sage Weil | eed0ef2 | 2009-11-10 14:34:36 -0800 | [diff] [blame] | 1516 | static int process_connect(struct ceph_connection *con) |
| 1517 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1518 | u64 sup_feat = con->msgr->supported_features; |
| 1519 | u64 req_feat = con->msgr->required_features; |
Sage Weil | 04a419f | 2009-12-23 09:30:21 -0800 | [diff] [blame] | 1520 | u64 server_feat = le64_to_cpu(con->in_reply.features); |
Sage Weil | 0da5d70 | 2011-05-19 11:21:05 -0700 | [diff] [blame] | 1521 | int ret; |
Sage Weil | 04a419f | 2009-12-23 09:30:21 -0800 | [diff] [blame] | 1522 | |
Sage Weil | eed0ef2 | 2009-11-10 14:34:36 -0800 | [diff] [blame] | 1523 | dout("process_connect on %p tag %d\n", con, (int)con->in_tag); |
| 1524 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1525 | switch (con->in_reply.tag) { |
Sage Weil | 04a419f | 2009-12-23 09:30:21 -0800 | [diff] [blame] | 1526 | case CEPH_MSGR_TAG_FEATURES: |
| 1527 | pr_err("%s%lld %s feature set mismatch," |
| 1528 | " my %llx < server's %llx, missing %llx\n", |
| 1529 | ENTITY_NAME(con->peer_name), |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1530 | ceph_pr_addr(&con->peer_addr.in_addr), |
Sage Weil | 04a419f | 2009-12-23 09:30:21 -0800 | [diff] [blame] | 1531 | sup_feat, server_feat, server_feat & ~sup_feat); |
| 1532 | con->error_msg = "missing required protocol features"; |
| 1533 | fail_protocol(con); |
| 1534 | return -1; |
| 1535 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1536 | case CEPH_MSGR_TAG_BADPROTOVER: |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1537 | pr_err("%s%lld %s protocol version mismatch," |
| 1538 | " my %d != server's %d\n", |
| 1539 | ENTITY_NAME(con->peer_name), |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1540 | ceph_pr_addr(&con->peer_addr.in_addr), |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1541 | le32_to_cpu(con->out_connect.protocol_version), |
| 1542 | le32_to_cpu(con->in_reply.protocol_version)); |
| 1543 | con->error_msg = "protocol version mismatch"; |
Sage Weil | 04a419f | 2009-12-23 09:30:21 -0800 | [diff] [blame] | 1544 | fail_protocol(con); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1545 | return -1; |
| 1546 | |
Sage Weil | 4e7a5dc | 2009-11-18 16:19:57 -0800 | [diff] [blame] | 1547 | case CEPH_MSGR_TAG_BADAUTHORIZER: |
| 1548 | con->auth_retry++; |
| 1549 | dout("process_connect %p got BADAUTHORIZER attempt %d\n", con, |
| 1550 | con->auth_retry); |
| 1551 | if (con->auth_retry == 2) { |
| 1552 | con->error_msg = "connect authorization failure"; |
Sage Weil | 4e7a5dc | 2009-11-18 16:19:57 -0800 | [diff] [blame] | 1553 | return -1; |
| 1554 | } |
| 1555 | con->auth_retry = 1; |
Jim Schutt | 6d4221b | 2012-08-10 10:37:38 -0700 | [diff] [blame] | 1556 | con_out_kvec_reset(con); |
Alex Elder | e825a66 | 2012-05-16 15:16:38 -0500 | [diff] [blame] | 1557 | ret = prepare_write_connect(con); |
Sage Weil | 0da5d70 | 2011-05-19 11:21:05 -0700 | [diff] [blame] | 1558 | if (ret < 0) |
| 1559 | return ret; |
Sage Weil | 63733a0 | 2010-03-15 15:47:22 -0700 | [diff] [blame] | 1560 | prepare_read_connect(con); |
Sage Weil | 4e7a5dc | 2009-11-18 16:19:57 -0800 | [diff] [blame] | 1561 | break; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1562 | |
| 1563 | case CEPH_MSGR_TAG_RESETSESSION: |
| 1564 | /* |
| 1565 | * If we connected with a large connect_seq but the peer |
| 1566 | * has no record of a session with us (no connection, or |
| 1567 | * connect_seq == 0), they will send RESETSESION to indicate |
| 1568 | * that they must have reset their session, and may have |
| 1569 | * dropped messages. |
| 1570 | */ |
| 1571 | dout("process_connect got RESET peer seq %u\n", |
Sage Weil | 5bdca4e | 2012-07-10 11:53:34 -0700 | [diff] [blame] | 1572 | le32_to_cpu(con->in_reply.connect_seq)); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1573 | pr_err("%s%lld %s connection reset\n", |
| 1574 | ENTITY_NAME(con->peer_name), |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1575 | ceph_pr_addr(&con->peer_addr.in_addr)); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1576 | reset_connection(con); |
Jim Schutt | 6d4221b | 2012-08-10 10:37:38 -0700 | [diff] [blame] | 1577 | con_out_kvec_reset(con); |
Alex Elder | 5a0f8fd | 2012-05-16 21:51:59 -0500 | [diff] [blame] | 1578 | ret = prepare_write_connect(con); |
| 1579 | if (ret < 0) |
| 1580 | return ret; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1581 | prepare_read_connect(con); |
| 1582 | |
| 1583 | /* Tell ceph about it. */ |
Sage Weil | ec30264 | 2009-12-22 10:43:42 -0800 | [diff] [blame] | 1584 | mutex_unlock(&con->mutex); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1585 | pr_info("reset on %s%lld\n", ENTITY_NAME(con->peer_name)); |
| 1586 | if (con->ops->peer_reset) |
| 1587 | con->ops->peer_reset(con); |
Sage Weil | ec30264 | 2009-12-22 10:43:42 -0800 | [diff] [blame] | 1588 | mutex_lock(&con->mutex); |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 1589 | if (con->state != CON_STATE_NEGOTIATING) |
Sage Weil | 0da5d70 | 2011-05-19 11:21:05 -0700 | [diff] [blame] | 1590 | return -EAGAIN; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1591 | break; |
| 1592 | |
| 1593 | case CEPH_MSGR_TAG_RETRY_SESSION: |
| 1594 | /* |
| 1595 | * If we sent a smaller connect_seq than the peer has, try |
| 1596 | * again with a larger value. |
| 1597 | */ |
Sage Weil | 5bdca4e | 2012-07-10 11:53:34 -0700 | [diff] [blame] | 1598 | dout("process_connect got RETRY_SESSION my seq %u, peer %u\n", |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1599 | le32_to_cpu(con->out_connect.connect_seq), |
Sage Weil | 5bdca4e | 2012-07-10 11:53:34 -0700 | [diff] [blame] | 1600 | le32_to_cpu(con->in_reply.connect_seq)); |
| 1601 | con->connect_seq = le32_to_cpu(con->in_reply.connect_seq); |
Jim Schutt | 6d4221b | 2012-08-10 10:37:38 -0700 | [diff] [blame] | 1602 | con_out_kvec_reset(con); |
Alex Elder | 5a0f8fd | 2012-05-16 21:51:59 -0500 | [diff] [blame] | 1603 | ret = prepare_write_connect(con); |
| 1604 | if (ret < 0) |
| 1605 | return ret; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1606 | prepare_read_connect(con); |
| 1607 | break; |
| 1608 | |
| 1609 | case CEPH_MSGR_TAG_RETRY_GLOBAL: |
| 1610 | /* |
| 1611 | * If we sent a smaller global_seq than the peer has, try |
| 1612 | * again with a larger value. |
| 1613 | */ |
Sage Weil | eed0ef2 | 2009-11-10 14:34:36 -0800 | [diff] [blame] | 1614 | dout("process_connect got RETRY_GLOBAL my %u peer_gseq %u\n", |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1615 | con->peer_global_seq, |
Sage Weil | 5bdca4e | 2012-07-10 11:53:34 -0700 | [diff] [blame] | 1616 | le32_to_cpu(con->in_reply.global_seq)); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1617 | get_global_seq(con->msgr, |
Sage Weil | 5bdca4e | 2012-07-10 11:53:34 -0700 | [diff] [blame] | 1618 | le32_to_cpu(con->in_reply.global_seq)); |
Jim Schutt | 6d4221b | 2012-08-10 10:37:38 -0700 | [diff] [blame] | 1619 | con_out_kvec_reset(con); |
Alex Elder | 5a0f8fd | 2012-05-16 21:51:59 -0500 | [diff] [blame] | 1620 | ret = prepare_write_connect(con); |
| 1621 | if (ret < 0) |
| 1622 | return ret; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1623 | prepare_read_connect(con); |
| 1624 | break; |
| 1625 | |
| 1626 | case CEPH_MSGR_TAG_READY: |
Sage Weil | 04a419f | 2009-12-23 09:30:21 -0800 | [diff] [blame] | 1627 | if (req_feat & ~server_feat) { |
| 1628 | pr_err("%s%lld %s protocol feature mismatch," |
| 1629 | " my required %llx > server's %llx, need %llx\n", |
| 1630 | ENTITY_NAME(con->peer_name), |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1631 | ceph_pr_addr(&con->peer_addr.in_addr), |
Sage Weil | 04a419f | 2009-12-23 09:30:21 -0800 | [diff] [blame] | 1632 | req_feat, server_feat, req_feat & ~server_feat); |
| 1633 | con->error_msg = "missing required protocol features"; |
| 1634 | fail_protocol(con); |
| 1635 | return -1; |
| 1636 | } |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 1637 | |
| 1638 | BUG_ON(con->state != CON_STATE_NEGOTIATING); |
| 1639 | con->state = CON_STATE_OPEN; |
| 1640 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1641 | con->peer_global_seq = le32_to_cpu(con->in_reply.global_seq); |
| 1642 | con->connect_seq++; |
Sage Weil | aba558e | 2010-05-12 15:23:30 -0700 | [diff] [blame] | 1643 | con->peer_features = server_feat; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1644 | dout("process_connect got READY gseq %d cseq %d (%d)\n", |
| 1645 | con->peer_global_seq, |
| 1646 | le32_to_cpu(con->in_reply.connect_seq), |
| 1647 | con->connect_seq); |
| 1648 | WARN_ON(con->connect_seq != |
| 1649 | le32_to_cpu(con->in_reply.connect_seq)); |
Sage Weil | 92ac41d | 2009-12-14 14:56:56 -0800 | [diff] [blame] | 1650 | |
| 1651 | if (con->in_reply.flags & CEPH_MSG_CONNECT_LOSSY) |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 1652 | set_bit(CON_FLAG_LOSSYTX, &con->flags); |
Sage Weil | 92ac41d | 2009-12-14 14:56:56 -0800 | [diff] [blame] | 1653 | |
Sage Weil | 85effe1 | 2012-07-30 16:22:05 -0700 | [diff] [blame] | 1654 | con->delay = 0; /* reset backoff memory */ |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1655 | |
| 1656 | prepare_read_tag(con); |
| 1657 | break; |
| 1658 | |
| 1659 | case CEPH_MSGR_TAG_WAIT: |
| 1660 | /* |
| 1661 | * If there is a connection race (we are opening |
| 1662 | * connections to each other), one of us may just have |
| 1663 | * to WAIT. This shouldn't happen if we are the |
| 1664 | * client. |
| 1665 | */ |
Sage Weil | 0417788 | 2011-05-12 15:33:17 -0700 | [diff] [blame] | 1666 | pr_err("process_connect got WAIT as client\n"); |
| 1667 | con->error_msg = "protocol error, got WAIT as client"; |
| 1668 | return -1; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1669 | |
| 1670 | default: |
| 1671 | pr_err("connect protocol error, will retry\n"); |
| 1672 | con->error_msg = "protocol error, garbage tag during connect"; |
| 1673 | return -1; |
| 1674 | } |
| 1675 | return 0; |
| 1676 | } |
| 1677 | |
| 1678 | |
| 1679 | /* |
| 1680 | * read (part of) an ack |
| 1681 | */ |
| 1682 | static int read_partial_ack(struct ceph_connection *con) |
| 1683 | { |
Alex Elder | fd51653 | 2012-05-10 10:29:50 -0500 | [diff] [blame] | 1684 | int size = sizeof (con->in_temp_ack); |
| 1685 | int end = size; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1686 | |
Alex Elder | fd51653 | 2012-05-10 10:29:50 -0500 | [diff] [blame] | 1687 | return read_partial(con, end, size, &con->in_temp_ack); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1688 | } |
| 1689 | |
| 1690 | |
| 1691 | /* |
| 1692 | * We can finally discard anything that's been acked. |
| 1693 | */ |
| 1694 | static void process_ack(struct ceph_connection *con) |
| 1695 | { |
| 1696 | struct ceph_msg *m; |
| 1697 | u64 ack = le64_to_cpu(con->in_temp_ack); |
| 1698 | u64 seq; |
| 1699 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1700 | while (!list_empty(&con->out_sent)) { |
| 1701 | m = list_first_entry(&con->out_sent, struct ceph_msg, |
| 1702 | list_head); |
| 1703 | seq = le64_to_cpu(m->hdr.seq); |
| 1704 | if (seq > ack) |
| 1705 | break; |
| 1706 | dout("got ack for seq %llu type %d at %p\n", seq, |
| 1707 | le16_to_cpu(m->hdr.type), m); |
Sage Weil | 4cf9d54 | 2011-07-26 11:27:24 -0700 | [diff] [blame] | 1708 | m->ack_stamp = jiffies; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1709 | ceph_msg_remove(m); |
| 1710 | } |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1711 | prepare_read_tag(con); |
| 1712 | } |
| 1713 | |
| 1714 | |
| 1715 | |
| 1716 | |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 1717 | static int read_partial_message_section(struct ceph_connection *con, |
Sage Weil | 213c99e | 2010-08-03 10:25:11 -0700 | [diff] [blame] | 1718 | struct kvec *section, |
| 1719 | unsigned int sec_len, u32 *crc) |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 1720 | { |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1721 | int ret, left; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1722 | |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 1723 | BUG_ON(!section); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1724 | |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 1725 | while (section->iov_len < sec_len) { |
| 1726 | BUG_ON(section->iov_base == NULL); |
| 1727 | left = sec_len - section->iov_len; |
| 1728 | ret = ceph_tcp_recvmsg(con->sock, (char *)section->iov_base + |
| 1729 | section->iov_len, left); |
| 1730 | if (ret <= 0) |
| 1731 | return ret; |
| 1732 | section->iov_len += ret; |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 1733 | } |
Alex Elder | fe3ad59 | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 1734 | if (section->iov_len == sec_len) |
| 1735 | *crc = crc32c(0, section->iov_base, section->iov_len); |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 1736 | |
| 1737 | return 1; |
| 1738 | } |
| 1739 | |
Sage Weil | 4740a62 | 2012-07-30 18:19:30 -0700 | [diff] [blame] | 1740 | static int ceph_con_in_msg_alloc(struct ceph_connection *con, int *skip); |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1741 | |
| 1742 | static int read_partial_message_pages(struct ceph_connection *con, |
| 1743 | struct page **pages, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1744 | unsigned int data_len, bool do_datacrc) |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1745 | { |
| 1746 | void *p; |
| 1747 | int ret; |
| 1748 | int left; |
| 1749 | |
| 1750 | left = min((int)(data_len - con->in_msg_pos.data_pos), |
| 1751 | (int)(PAGE_SIZE - con->in_msg_pos.page_pos)); |
| 1752 | /* (page) data */ |
| 1753 | BUG_ON(pages == NULL); |
| 1754 | p = kmap(pages[con->in_msg_pos.page]); |
| 1755 | ret = ceph_tcp_recvmsg(con->sock, p + con->in_msg_pos.page_pos, |
| 1756 | left); |
Alex Elder | bca064d | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 1757 | if (ret > 0 && do_datacrc) |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1758 | con->in_data_crc = |
| 1759 | crc32c(con->in_data_crc, |
| 1760 | p + con->in_msg_pos.page_pos, ret); |
| 1761 | kunmap(pages[con->in_msg_pos.page]); |
| 1762 | if (ret <= 0) |
| 1763 | return ret; |
| 1764 | con->in_msg_pos.data_pos += ret; |
| 1765 | con->in_msg_pos.page_pos += ret; |
| 1766 | if (con->in_msg_pos.page_pos == PAGE_SIZE) { |
| 1767 | con->in_msg_pos.page_pos = 0; |
| 1768 | con->in_msg_pos.page++; |
| 1769 | } |
| 1770 | |
| 1771 | return ret; |
| 1772 | } |
| 1773 | |
| 1774 | #ifdef CONFIG_BLOCK |
| 1775 | static int read_partial_message_bio(struct ceph_connection *con, |
| 1776 | struct bio **bio_iter, int *bio_seg, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1777 | unsigned int data_len, bool do_datacrc) |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1778 | { |
| 1779 | struct bio_vec *bv = bio_iovec_idx(*bio_iter, *bio_seg); |
| 1780 | void *p; |
| 1781 | int ret, left; |
| 1782 | |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1783 | left = min((int)(data_len - con->in_msg_pos.data_pos), |
| 1784 | (int)(bv->bv_len - con->in_msg_pos.page_pos)); |
| 1785 | |
| 1786 | p = kmap(bv->bv_page) + bv->bv_offset; |
| 1787 | |
| 1788 | ret = ceph_tcp_recvmsg(con->sock, p + con->in_msg_pos.page_pos, |
| 1789 | left); |
Alex Elder | bca064d | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 1790 | if (ret > 0 && do_datacrc) |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1791 | con->in_data_crc = |
| 1792 | crc32c(con->in_data_crc, |
| 1793 | p + con->in_msg_pos.page_pos, ret); |
| 1794 | kunmap(bv->bv_page); |
| 1795 | if (ret <= 0) |
| 1796 | return ret; |
| 1797 | con->in_msg_pos.data_pos += ret; |
| 1798 | con->in_msg_pos.page_pos += ret; |
| 1799 | if (con->in_msg_pos.page_pos == bv->bv_len) { |
| 1800 | con->in_msg_pos.page_pos = 0; |
| 1801 | iter_bio_next(bio_iter, bio_seg); |
| 1802 | } |
| 1803 | |
| 1804 | return ret; |
| 1805 | } |
| 1806 | #endif |
| 1807 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1808 | /* |
| 1809 | * read (part of) a message. |
| 1810 | */ |
| 1811 | static int read_partial_message(struct ceph_connection *con) |
| 1812 | { |
| 1813 | struct ceph_msg *m = con->in_msg; |
Alex Elder | fd51653 | 2012-05-10 10:29:50 -0500 | [diff] [blame] | 1814 | int size; |
| 1815 | int end; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1816 | int ret; |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1817 | unsigned int front_len, middle_len, data_len; |
Alex Elder | 37675b0 | 2012-03-07 11:40:08 -0600 | [diff] [blame] | 1818 | bool do_datacrc = !con->msgr->nocrc; |
Sage Weil | ae18756 | 2010-04-22 07:47:01 -0700 | [diff] [blame] | 1819 | u64 seq; |
Alex Elder | fe3ad59 | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 1820 | u32 crc; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1821 | |
| 1822 | dout("read_partial_message con %p msg %p\n", con, m); |
| 1823 | |
| 1824 | /* header */ |
Alex Elder | fd51653 | 2012-05-10 10:29:50 -0500 | [diff] [blame] | 1825 | size = sizeof (con->in_hdr); |
| 1826 | end = size; |
| 1827 | ret = read_partial(con, end, size, &con->in_hdr); |
Alex Elder | 57dac9d | 2012-05-10 10:29:50 -0500 | [diff] [blame] | 1828 | if (ret <= 0) |
| 1829 | return ret; |
Alex Elder | fe3ad59 | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 1830 | |
| 1831 | crc = crc32c(0, &con->in_hdr, offsetof(struct ceph_msg_header, crc)); |
| 1832 | if (cpu_to_le32(crc) != con->in_hdr.crc) { |
| 1833 | pr_err("read_partial_message bad hdr " |
| 1834 | " crc %u != expected %u\n", |
| 1835 | crc, con->in_hdr.crc); |
| 1836 | return -EBADMSG; |
| 1837 | } |
| 1838 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1839 | front_len = le32_to_cpu(con->in_hdr.front_len); |
| 1840 | if (front_len > CEPH_MSG_MAX_FRONT_LEN) |
| 1841 | return -EIO; |
| 1842 | middle_len = le32_to_cpu(con->in_hdr.middle_len); |
| 1843 | if (middle_len > CEPH_MSG_MAX_DATA_LEN) |
| 1844 | return -EIO; |
| 1845 | data_len = le32_to_cpu(con->in_hdr.data_len); |
| 1846 | if (data_len > CEPH_MSG_MAX_DATA_LEN) |
| 1847 | return -EIO; |
| 1848 | |
Sage Weil | ae18756 | 2010-04-22 07:47:01 -0700 | [diff] [blame] | 1849 | /* verify seq# */ |
| 1850 | seq = le64_to_cpu(con->in_hdr.seq); |
| 1851 | if ((s64)seq - (s64)con->in_seq < 1) { |
Sage Weil | df9f86f | 2010-11-01 15:49:23 -0700 | [diff] [blame] | 1852 | pr_info("skipping %s%lld %s seq %lld expected %lld\n", |
Sage Weil | ae18756 | 2010-04-22 07:47:01 -0700 | [diff] [blame] | 1853 | ENTITY_NAME(con->peer_name), |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1854 | ceph_pr_addr(&con->peer_addr.in_addr), |
Sage Weil | ae18756 | 2010-04-22 07:47:01 -0700 | [diff] [blame] | 1855 | seq, con->in_seq + 1); |
| 1856 | con->in_base_pos = -front_len - middle_len - data_len - |
| 1857 | sizeof(m->footer); |
| 1858 | con->in_tag = CEPH_MSGR_TAG_READY; |
Sage Weil | ae18756 | 2010-04-22 07:47:01 -0700 | [diff] [blame] | 1859 | return 0; |
| 1860 | } else if ((s64)seq - (s64)con->in_seq > 1) { |
| 1861 | pr_err("read_partial_message bad seq %lld expected %lld\n", |
| 1862 | seq, con->in_seq + 1); |
| 1863 | con->error_msg = "bad message sequence # for incoming message"; |
| 1864 | return -EBADMSG; |
| 1865 | } |
| 1866 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1867 | /* allocate message? */ |
| 1868 | if (!con->in_msg) { |
Sage Weil | 4740a62 | 2012-07-30 18:19:30 -0700 | [diff] [blame] | 1869 | int skip = 0; |
| 1870 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1871 | dout("got hdr type %d front %d data %d\n", con->in_hdr.type, |
| 1872 | con->in_hdr.front_len, con->in_hdr.data_len); |
Sage Weil | 4740a62 | 2012-07-30 18:19:30 -0700 | [diff] [blame] | 1873 | ret = ceph_con_in_msg_alloc(con, &skip); |
| 1874 | if (ret < 0) |
| 1875 | return ret; |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 1876 | if (skip) { |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1877 | /* skip this message */ |
Sage Weil | a79832f | 2010-04-01 16:06:19 -0700 | [diff] [blame] | 1878 | dout("alloc_msg said skip message\n"); |
Sage Weil | ae32be3 | 2010-06-13 10:30:19 -0700 | [diff] [blame] | 1879 | BUG_ON(con->in_msg); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1880 | con->in_base_pos = -front_len - middle_len - data_len - |
| 1881 | sizeof(m->footer); |
| 1882 | con->in_tag = CEPH_MSGR_TAG_READY; |
Sage Weil | 684be25 | 2010-04-21 20:45:59 -0700 | [diff] [blame] | 1883 | con->in_seq++; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1884 | return 0; |
| 1885 | } |
Alex Elder | 38941f8 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 1886 | |
Sage Weil | 4740a62 | 2012-07-30 18:19:30 -0700 | [diff] [blame] | 1887 | BUG_ON(!con->in_msg); |
Alex Elder | 38941f8 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 1888 | BUG_ON(con->in_msg->con != con); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1889 | m = con->in_msg; |
| 1890 | m->front.iov_len = 0; /* haven't read it yet */ |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 1891 | if (m->middle) |
| 1892 | m->middle->vec.iov_len = 0; |
Yehuda Sadeh | 9d7f0f1 | 2010-01-11 10:32:02 -0800 | [diff] [blame] | 1893 | |
| 1894 | con->in_msg_pos.page = 0; |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1895 | if (m->pages) |
Sage Weil | c5c6b19 | 2010-11-09 12:40:00 -0800 | [diff] [blame] | 1896 | con->in_msg_pos.page_pos = m->page_alignment; |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1897 | else |
| 1898 | con->in_msg_pos.page_pos = 0; |
Yehuda Sadeh | 9d7f0f1 | 2010-01-11 10:32:02 -0800 | [diff] [blame] | 1899 | con->in_msg_pos.data_pos = 0; |
Sage Weil | a410702 | 2012-07-30 16:20:25 -0700 | [diff] [blame] | 1900 | |
| 1901 | #ifdef CONFIG_BLOCK |
| 1902 | if (m->bio) |
| 1903 | init_bio_iter(m->bio, &m->bio_iter, &m->bio_seg); |
| 1904 | #endif |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1905 | } |
| 1906 | |
| 1907 | /* front */ |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 1908 | ret = read_partial_message_section(con, &m->front, front_len, |
| 1909 | &con->in_front_crc); |
| 1910 | if (ret <= 0) |
| 1911 | return ret; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1912 | |
| 1913 | /* middle */ |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 1914 | if (m->middle) { |
Sage Weil | 213c99e | 2010-08-03 10:25:11 -0700 | [diff] [blame] | 1915 | ret = read_partial_message_section(con, &m->middle->vec, |
| 1916 | middle_len, |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 1917 | &con->in_middle_crc); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1918 | if (ret <= 0) |
| 1919 | return ret; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1920 | } |
| 1921 | |
| 1922 | /* (page) data */ |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1923 | while (con->in_msg_pos.data_pos < data_len) { |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1924 | if (m->pages) { |
| 1925 | ret = read_partial_message_pages(con, m->pages, |
Alex Elder | bca064d | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 1926 | data_len, do_datacrc); |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1927 | if (ret <= 0) |
| 1928 | return ret; |
| 1929 | #ifdef CONFIG_BLOCK |
| 1930 | } else if (m->bio) { |
Sage Weil | a410702 | 2012-07-30 16:20:25 -0700 | [diff] [blame] | 1931 | BUG_ON(!m->bio_iter); |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1932 | ret = read_partial_message_bio(con, |
| 1933 | &m->bio_iter, &m->bio_seg, |
Alex Elder | bca064d | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 1934 | data_len, do_datacrc); |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 1935 | if (ret <= 0) |
| 1936 | return ret; |
| 1937 | #endif |
| 1938 | } else { |
| 1939 | BUG_ON(1); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1940 | } |
| 1941 | } |
| 1942 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1943 | /* footer */ |
Alex Elder | fd51653 | 2012-05-10 10:29:50 -0500 | [diff] [blame] | 1944 | size = sizeof (m->footer); |
| 1945 | end += size; |
| 1946 | ret = read_partial(con, end, size, &m->footer); |
Alex Elder | 57dac9d | 2012-05-10 10:29:50 -0500 | [diff] [blame] | 1947 | if (ret <= 0) |
| 1948 | return ret; |
| 1949 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1950 | dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n", |
| 1951 | m, front_len, m->footer.front_crc, middle_len, |
| 1952 | m->footer.middle_crc, data_len, m->footer.data_crc); |
| 1953 | |
| 1954 | /* crc ok? */ |
| 1955 | if (con->in_front_crc != le32_to_cpu(m->footer.front_crc)) { |
| 1956 | pr_err("read_partial_message %p front crc %u != exp. %u\n", |
| 1957 | m, con->in_front_crc, m->footer.front_crc); |
| 1958 | return -EBADMSG; |
| 1959 | } |
| 1960 | if (con->in_middle_crc != le32_to_cpu(m->footer.middle_crc)) { |
| 1961 | pr_err("read_partial_message %p middle crc %u != exp %u\n", |
| 1962 | m, con->in_middle_crc, m->footer.middle_crc); |
| 1963 | return -EBADMSG; |
| 1964 | } |
Alex Elder | bca064d | 2012-02-15 07:43:54 -0600 | [diff] [blame] | 1965 | if (do_datacrc && |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1966 | (m->footer.flags & CEPH_MSG_FOOTER_NOCRC) == 0 && |
| 1967 | con->in_data_crc != le32_to_cpu(m->footer.data_crc)) { |
| 1968 | pr_err("read_partial_message %p data crc %u != exp. %u\n", m, |
| 1969 | con->in_data_crc, le32_to_cpu(m->footer.data_crc)); |
| 1970 | return -EBADMSG; |
| 1971 | } |
| 1972 | |
| 1973 | return 1; /* done! */ |
| 1974 | } |
| 1975 | |
| 1976 | /* |
| 1977 | * Process message. This happens in the worker thread. The callback should |
| 1978 | * be careful not to do anything that waits on other incoming messages or it |
| 1979 | * may deadlock. |
| 1980 | */ |
| 1981 | static void process_message(struct ceph_connection *con) |
| 1982 | { |
Sage Weil | 5e095e8 | 2009-12-14 14:30:34 -0800 | [diff] [blame] | 1983 | struct ceph_msg *msg; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1984 | |
Alex Elder | 38941f8 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 1985 | BUG_ON(con->in_msg->con != con); |
| 1986 | con->in_msg->con = NULL; |
Sage Weil | 5e095e8 | 2009-12-14 14:30:34 -0800 | [diff] [blame] | 1987 | msg = con->in_msg; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1988 | con->in_msg = NULL; |
Sage Weil | 36eb71a | 2012-06-21 12:47:08 -0700 | [diff] [blame] | 1989 | con->ops->put(con); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1990 | |
| 1991 | /* if first message, set peer_name */ |
| 1992 | if (con->peer_name.type == 0) |
Sage Weil | dbad185 | 2010-03-25 15:45:38 -0700 | [diff] [blame] | 1993 | con->peer_name = msg->hdr.src; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1994 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1995 | con->in_seq++; |
Sage Weil | ec30264 | 2009-12-22 10:43:42 -0800 | [diff] [blame] | 1996 | mutex_unlock(&con->mutex); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 1997 | |
| 1998 | dout("===== %p %llu from %s%lld %d=%s len %d+%d (%u %u %u) =====\n", |
| 1999 | msg, le64_to_cpu(msg->hdr.seq), |
Sage Weil | dbad185 | 2010-03-25 15:45:38 -0700 | [diff] [blame] | 2000 | ENTITY_NAME(msg->hdr.src), |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2001 | le16_to_cpu(msg->hdr.type), |
| 2002 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), |
| 2003 | le32_to_cpu(msg->hdr.front_len), |
| 2004 | le32_to_cpu(msg->hdr.data_len), |
| 2005 | con->in_front_crc, con->in_middle_crc, con->in_data_crc); |
| 2006 | con->ops->dispatch(con, msg); |
Sage Weil | ec30264 | 2009-12-22 10:43:42 -0800 | [diff] [blame] | 2007 | |
| 2008 | mutex_lock(&con->mutex); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2009 | } |
| 2010 | |
| 2011 | |
| 2012 | /* |
| 2013 | * Write something to the socket. Called in a worker thread when the |
| 2014 | * socket appears to be writeable and we have something ready to send. |
| 2015 | */ |
| 2016 | static int try_write(struct ceph_connection *con) |
| 2017 | { |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2018 | int ret = 1; |
| 2019 | |
Sage Weil | d59315c | 2012-06-21 12:49:23 -0700 | [diff] [blame] | 2020 | dout("try_write start %p state %lu\n", con, con->state); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2021 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2022 | more: |
| 2023 | dout("try_write out_kvec_bytes %d\n", con->out_kvec_bytes); |
| 2024 | |
| 2025 | /* open the socket first? */ |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2026 | if (con->state == CON_STATE_PREOPEN) { |
| 2027 | BUG_ON(con->sock); |
| 2028 | con->state = CON_STATE_CONNECTING; |
Alex Elder | a5988c4 | 2012-05-29 11:04:58 -0500 | [diff] [blame] | 2029 | |
Alex Elder | e220042 | 2012-05-23 14:35:23 -0500 | [diff] [blame] | 2030 | con_out_kvec_reset(con); |
Alex Elder | e825a66 | 2012-05-16 15:16:38 -0500 | [diff] [blame] | 2031 | prepare_write_banner(con); |
Sage Weil | eed0ef2 | 2009-11-10 14:34:36 -0800 | [diff] [blame] | 2032 | prepare_read_banner(con); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2033 | |
Sage Weil | cf3e5c4 | 2009-12-11 09:48:05 -0800 | [diff] [blame] | 2034 | BUG_ON(con->in_msg); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2035 | con->in_tag = CEPH_MSGR_TAG_READY; |
| 2036 | dout("try_write initiating connect on %p new state %lu\n", |
| 2037 | con, con->state); |
Alex Elder | 41617d0 | 2012-02-14 14:05:33 -0600 | [diff] [blame] | 2038 | ret = ceph_tcp_connect(con); |
| 2039 | if (ret < 0) { |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2040 | con->error_msg = "connect error"; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2041 | goto out; |
| 2042 | } |
| 2043 | } |
| 2044 | |
| 2045 | more_kvec: |
| 2046 | /* kvec data queued? */ |
| 2047 | if (con->out_skip) { |
| 2048 | ret = write_partial_skip(con); |
| 2049 | if (ret <= 0) |
Sage Weil | 42961d2 | 2011-01-25 08:19:34 -0800 | [diff] [blame] | 2050 | goto out; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2051 | } |
| 2052 | if (con->out_kvec_left) { |
| 2053 | ret = write_partial_kvec(con); |
| 2054 | if (ret <= 0) |
Sage Weil | 42961d2 | 2011-01-25 08:19:34 -0800 | [diff] [blame] | 2055 | goto out; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2056 | } |
| 2057 | |
| 2058 | /* msg pages? */ |
| 2059 | if (con->out_msg) { |
Sage Weil | c86a293 | 2009-12-14 14:04:30 -0800 | [diff] [blame] | 2060 | if (con->out_msg_done) { |
| 2061 | ceph_msg_put(con->out_msg); |
| 2062 | con->out_msg = NULL; /* we're done with this one */ |
| 2063 | goto do_next; |
| 2064 | } |
| 2065 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2066 | ret = write_partial_msg_pages(con); |
| 2067 | if (ret == 1) |
| 2068 | goto more_kvec; /* we need to send the footer, too! */ |
| 2069 | if (ret == 0) |
Sage Weil | 42961d2 | 2011-01-25 08:19:34 -0800 | [diff] [blame] | 2070 | goto out; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2071 | if (ret < 0) { |
| 2072 | dout("try_write write_partial_msg_pages err %d\n", |
| 2073 | ret); |
Sage Weil | 42961d2 | 2011-01-25 08:19:34 -0800 | [diff] [blame] | 2074 | goto out; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2075 | } |
| 2076 | } |
| 2077 | |
Sage Weil | c86a293 | 2009-12-14 14:04:30 -0800 | [diff] [blame] | 2078 | do_next: |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2079 | if (con->state == CON_STATE_OPEN) { |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2080 | /* is anything else pending? */ |
| 2081 | if (!list_empty(&con->out_queue)) { |
| 2082 | prepare_write_message(con); |
| 2083 | goto more; |
| 2084 | } |
| 2085 | if (con->in_seq > con->in_seq_acked) { |
| 2086 | prepare_write_ack(con); |
| 2087 | goto more; |
| 2088 | } |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 2089 | if (test_and_clear_bit(CON_FLAG_KEEPALIVE_PENDING, |
| 2090 | &con->flags)) { |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2091 | prepare_write_keepalive(con); |
| 2092 | goto more; |
| 2093 | } |
| 2094 | } |
| 2095 | |
| 2096 | /* Nothing to do! */ |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 2097 | clear_bit(CON_FLAG_WRITE_PENDING, &con->flags); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2098 | dout("try_write nothing else to write.\n"); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2099 | ret = 0; |
| 2100 | out: |
Sage Weil | 42961d2 | 2011-01-25 08:19:34 -0800 | [diff] [blame] | 2101 | dout("try_write done on %p ret %d\n", con, ret); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2102 | return ret; |
| 2103 | } |
| 2104 | |
| 2105 | |
| 2106 | |
| 2107 | /* |
| 2108 | * Read what we can from the socket. |
| 2109 | */ |
| 2110 | static int try_read(struct ceph_connection *con) |
| 2111 | { |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2112 | int ret = -1; |
| 2113 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2114 | more: |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2115 | dout("try_read start on %p state %lu\n", con, con->state); |
| 2116 | if (con->state != CON_STATE_CONNECTING && |
| 2117 | con->state != CON_STATE_NEGOTIATING && |
| 2118 | con->state != CON_STATE_OPEN) |
| 2119 | return 0; |
| 2120 | |
| 2121 | BUG_ON(!con->sock); |
| 2122 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2123 | dout("try_read tag %d in_base_pos %d\n", (int)con->in_tag, |
| 2124 | con->in_base_pos); |
Sage Weil | 0da5d70 | 2011-05-19 11:21:05 -0700 | [diff] [blame] | 2125 | |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2126 | if (con->state == CON_STATE_CONNECTING) { |
Alex Elder | 7593af9 | 2012-05-24 11:55:03 -0500 | [diff] [blame] | 2127 | dout("try_read connecting\n"); |
| 2128 | ret = read_partial_banner(con); |
| 2129 | if (ret <= 0) |
Alex Elder | ab166d5 | 2012-05-31 11:37:29 -0500 | [diff] [blame] | 2130 | goto out; |
Alex Elder | 7593af9 | 2012-05-24 11:55:03 -0500 | [diff] [blame] | 2131 | ret = process_banner(con); |
| 2132 | if (ret < 0) |
| 2133 | goto out; |
| 2134 | |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2135 | BUG_ON(con->state != CON_STATE_CONNECTING); |
| 2136 | con->state = CON_STATE_NEGOTIATING; |
Alex Elder | 7593af9 | 2012-05-24 11:55:03 -0500 | [diff] [blame] | 2137 | |
Jim Schutt | 6d4221b | 2012-08-10 10:37:38 -0700 | [diff] [blame] | 2138 | /* |
| 2139 | * Received banner is good, exchange connection info. |
| 2140 | * Do not reset out_kvec, as sending our banner raced |
| 2141 | * with receiving peer banner after connect completed. |
| 2142 | */ |
Alex Elder | 7593af9 | 2012-05-24 11:55:03 -0500 | [diff] [blame] | 2143 | ret = prepare_write_connect(con); |
| 2144 | if (ret < 0) |
| 2145 | goto out; |
| 2146 | prepare_read_connect(con); |
| 2147 | |
| 2148 | /* Send connection info before awaiting response */ |
Sage Weil | 0da5d70 | 2011-05-19 11:21:05 -0700 | [diff] [blame] | 2149 | goto out; |
| 2150 | } |
| 2151 | |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2152 | if (con->state == CON_STATE_NEGOTIATING) { |
Alex Elder | 7593af9 | 2012-05-24 11:55:03 -0500 | [diff] [blame] | 2153 | dout("try_read negotiating\n"); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2154 | ret = read_partial_connect(con); |
| 2155 | if (ret <= 0) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2156 | goto out; |
Sage Weil | 98bdb0a | 2011-01-25 08:17:48 -0800 | [diff] [blame] | 2157 | ret = process_connect(con); |
| 2158 | if (ret < 0) |
| 2159 | goto out; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2160 | goto more; |
| 2161 | } |
| 2162 | |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2163 | BUG_ON(con->state != CON_STATE_OPEN); |
| 2164 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2165 | if (con->in_base_pos < 0) { |
| 2166 | /* |
| 2167 | * skipping + discarding content. |
| 2168 | * |
| 2169 | * FIXME: there must be a better way to do this! |
| 2170 | */ |
Alex Elder | 84495f4 | 2012-02-15 07:43:55 -0600 | [diff] [blame] | 2171 | static char buf[SKIP_BUF_SIZE]; |
| 2172 | int skip = min((int) sizeof (buf), -con->in_base_pos); |
| 2173 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2174 | dout("skipping %d / %d bytes\n", skip, -con->in_base_pos); |
| 2175 | ret = ceph_tcp_recvmsg(con->sock, buf, skip); |
| 2176 | if (ret <= 0) |
Sage Weil | 98bdb0a | 2011-01-25 08:17:48 -0800 | [diff] [blame] | 2177 | goto out; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2178 | con->in_base_pos += ret; |
| 2179 | if (con->in_base_pos) |
| 2180 | goto more; |
| 2181 | } |
| 2182 | if (con->in_tag == CEPH_MSGR_TAG_READY) { |
| 2183 | /* |
| 2184 | * what's next? |
| 2185 | */ |
| 2186 | ret = ceph_tcp_recvmsg(con->sock, &con->in_tag, 1); |
| 2187 | if (ret <= 0) |
Sage Weil | 98bdb0a | 2011-01-25 08:17:48 -0800 | [diff] [blame] | 2188 | goto out; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2189 | dout("try_read got tag %d\n", (int)con->in_tag); |
| 2190 | switch (con->in_tag) { |
| 2191 | case CEPH_MSGR_TAG_MSG: |
| 2192 | prepare_read_message(con); |
| 2193 | break; |
| 2194 | case CEPH_MSGR_TAG_ACK: |
| 2195 | prepare_read_ack(con); |
| 2196 | break; |
| 2197 | case CEPH_MSGR_TAG_CLOSE: |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2198 | con_close_socket(con); |
| 2199 | con->state = CON_STATE_CLOSED; |
Sage Weil | 98bdb0a | 2011-01-25 08:17:48 -0800 | [diff] [blame] | 2200 | goto out; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2201 | default: |
| 2202 | goto bad_tag; |
| 2203 | } |
| 2204 | } |
| 2205 | if (con->in_tag == CEPH_MSGR_TAG_MSG) { |
| 2206 | ret = read_partial_message(con); |
| 2207 | if (ret <= 0) { |
| 2208 | switch (ret) { |
| 2209 | case -EBADMSG: |
| 2210 | con->error_msg = "bad crc"; |
| 2211 | ret = -EIO; |
Sage Weil | 98bdb0a | 2011-01-25 08:17:48 -0800 | [diff] [blame] | 2212 | break; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2213 | case -EIO: |
| 2214 | con->error_msg = "io error"; |
Sage Weil | 98bdb0a | 2011-01-25 08:17:48 -0800 | [diff] [blame] | 2215 | break; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2216 | } |
Sage Weil | 98bdb0a | 2011-01-25 08:17:48 -0800 | [diff] [blame] | 2217 | goto out; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2218 | } |
| 2219 | if (con->in_tag == CEPH_MSGR_TAG_READY) |
| 2220 | goto more; |
| 2221 | process_message(con); |
Sage Weil | 7b862e0 | 2012-07-30 18:16:56 -0700 | [diff] [blame] | 2222 | if (con->state == CON_STATE_OPEN) |
| 2223 | prepare_read_tag(con); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2224 | goto more; |
| 2225 | } |
| 2226 | if (con->in_tag == CEPH_MSGR_TAG_ACK) { |
| 2227 | ret = read_partial_ack(con); |
| 2228 | if (ret <= 0) |
Sage Weil | 98bdb0a | 2011-01-25 08:17:48 -0800 | [diff] [blame] | 2229 | goto out; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2230 | process_ack(con); |
| 2231 | goto more; |
| 2232 | } |
| 2233 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2234 | out: |
Sage Weil | 98bdb0a | 2011-01-25 08:17:48 -0800 | [diff] [blame] | 2235 | dout("try_read done on %p ret %d\n", con, ret); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2236 | return ret; |
| 2237 | |
| 2238 | bad_tag: |
| 2239 | pr_err("try_read bad con->in_tag = %d\n", (int)con->in_tag); |
| 2240 | con->error_msg = "protocol error, garbage tag"; |
| 2241 | ret = -1; |
| 2242 | goto out; |
| 2243 | } |
| 2244 | |
| 2245 | |
| 2246 | /* |
| 2247 | * Atomically queue work on a connection. Bump @con reference to |
| 2248 | * avoid races with connection teardown. |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2249 | */ |
| 2250 | static void queue_con(struct ceph_connection *con) |
| 2251 | { |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2252 | if (!con->ops->get(con)) { |
| 2253 | dout("queue_con %p ref count 0\n", con); |
| 2254 | return; |
| 2255 | } |
| 2256 | |
Tejun Heo | f363e45 | 2011-01-03 14:49:46 +0100 | [diff] [blame] | 2257 | if (!queue_delayed_work(ceph_msgr_wq, &con->work, 0)) { |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2258 | dout("queue_con %p - already queued\n", con); |
| 2259 | con->ops->put(con); |
| 2260 | } else { |
| 2261 | dout("queue_con %p\n", con); |
| 2262 | } |
| 2263 | } |
| 2264 | |
| 2265 | /* |
| 2266 | * Do some work on a connection. Drop a connection ref when we're done. |
| 2267 | */ |
| 2268 | static void con_work(struct work_struct *work) |
| 2269 | { |
| 2270 | struct ceph_connection *con = container_of(work, struct ceph_connection, |
| 2271 | work.work); |
Sage Weil | 0da5d70 | 2011-05-19 11:21:05 -0700 | [diff] [blame] | 2272 | int ret; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2273 | |
Sage Weil | 9dd4658 | 2010-04-28 13:51:50 -0700 | [diff] [blame] | 2274 | mutex_lock(&con->mutex); |
Sage Weil | 0da5d70 | 2011-05-19 11:21:05 -0700 | [diff] [blame] | 2275 | restart: |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 2276 | if (test_and_clear_bit(CON_FLAG_SOCK_CLOSED, &con->flags)) { |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2277 | switch (con->state) { |
| 2278 | case CON_STATE_CONNECTING: |
Alex Elder | 188048b | 2012-06-20 21:53:53 -0500 | [diff] [blame] | 2279 | con->error_msg = "connection failed"; |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2280 | break; |
| 2281 | case CON_STATE_NEGOTIATING: |
| 2282 | con->error_msg = "negotiation failed"; |
| 2283 | break; |
| 2284 | case CON_STATE_OPEN: |
| 2285 | con->error_msg = "socket closed"; |
| 2286 | break; |
| 2287 | default: |
| 2288 | dout("unrecognized con state %d\n", (int)con->state); |
Alex Elder | e27947c | 2012-05-23 14:35:23 -0500 | [diff] [blame] | 2289 | con->error_msg = "unrecognized con state"; |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2290 | BUG(); |
| 2291 | } |
Alex Elder | 188048b | 2012-06-20 21:53:53 -0500 | [diff] [blame] | 2292 | goto fault; |
| 2293 | } |
| 2294 | |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 2295 | if (test_and_clear_bit(CON_FLAG_BACKOFF, &con->flags)) { |
Sage Weil | 60bf8bf | 2011-03-04 12:24:28 -0800 | [diff] [blame] | 2296 | dout("con_work %p backing off\n", con); |
| 2297 | if (queue_delayed_work(ceph_msgr_wq, &con->work, |
| 2298 | round_jiffies_relative(con->delay))) { |
| 2299 | dout("con_work %p backoff %lu\n", con, con->delay); |
| 2300 | mutex_unlock(&con->mutex); |
| 2301 | return; |
| 2302 | } else { |
Sage Weil | 60bf8bf | 2011-03-04 12:24:28 -0800 | [diff] [blame] | 2303 | dout("con_work %p FAILED to back off %lu\n", con, |
| 2304 | con->delay); |
Alex Elder | 588377d | 2012-10-08 20:37:30 -0700 | [diff] [blame] | 2305 | set_bit(CON_FLAG_BACKOFF, &con->flags); |
Sage Weil | 60bf8bf | 2011-03-04 12:24:28 -0800 | [diff] [blame] | 2306 | } |
Alex Elder | 588377d | 2012-10-08 20:37:30 -0700 | [diff] [blame] | 2307 | goto done; |
Sage Weil | 60bf8bf | 2011-03-04 12:24:28 -0800 | [diff] [blame] | 2308 | } |
Sage Weil | 9dd4658 | 2010-04-28 13:51:50 -0700 | [diff] [blame] | 2309 | |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2310 | if (con->state == CON_STATE_STANDBY) { |
Sage Weil | e00de34 | 2011-03-04 12:25:05 -0800 | [diff] [blame] | 2311 | dout("con_work %p STANDBY\n", con); |
| 2312 | goto done; |
| 2313 | } |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2314 | if (con->state == CON_STATE_CLOSED) { |
Sage Weil | 2e8cb10 | 2012-07-20 15:40:04 -0700 | [diff] [blame] | 2315 | dout("con_work %p CLOSED\n", con); |
| 2316 | BUG_ON(con->sock); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2317 | goto done; |
| 2318 | } |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2319 | if (con->state == CON_STATE_PREOPEN) { |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2320 | dout("con_work OPENING\n"); |
Sage Weil | 2e8cb10 | 2012-07-20 15:40:04 -0700 | [diff] [blame] | 2321 | BUG_ON(con->sock); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2322 | } |
| 2323 | |
Sage Weil | 0da5d70 | 2011-05-19 11:21:05 -0700 | [diff] [blame] | 2324 | ret = try_read(con); |
| 2325 | if (ret == -EAGAIN) |
| 2326 | goto restart; |
Sage Weil | 3a140a0 | 2012-07-30 16:24:21 -0700 | [diff] [blame] | 2327 | if (ret < 0) { |
| 2328 | con->error_msg = "socket error on read"; |
Sage Weil | 0da5d70 | 2011-05-19 11:21:05 -0700 | [diff] [blame] | 2329 | goto fault; |
Sage Weil | 3a140a0 | 2012-07-30 16:24:21 -0700 | [diff] [blame] | 2330 | } |
Sage Weil | 0da5d70 | 2011-05-19 11:21:05 -0700 | [diff] [blame] | 2331 | |
| 2332 | ret = try_write(con); |
| 2333 | if (ret == -EAGAIN) |
| 2334 | goto restart; |
Sage Weil | 3a140a0 | 2012-07-30 16:24:21 -0700 | [diff] [blame] | 2335 | if (ret < 0) { |
| 2336 | con->error_msg = "socket error on write"; |
Sage Weil | 0da5d70 | 2011-05-19 11:21:05 -0700 | [diff] [blame] | 2337 | goto fault; |
Sage Weil | 3a140a0 | 2012-07-30 16:24:21 -0700 | [diff] [blame] | 2338 | } |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2339 | |
| 2340 | done: |
Sage Weil | 9dd4658 | 2010-04-28 13:51:50 -0700 | [diff] [blame] | 2341 | mutex_unlock(&con->mutex); |
Sage Weil | 9dd4658 | 2010-04-28 13:51:50 -0700 | [diff] [blame] | 2342 | done_unlocked: |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2343 | con->ops->put(con); |
Sage Weil | 0da5d70 | 2011-05-19 11:21:05 -0700 | [diff] [blame] | 2344 | return; |
| 2345 | |
| 2346 | fault: |
Sage Weil | 0da5d70 | 2011-05-19 11:21:05 -0700 | [diff] [blame] | 2347 | ceph_fault(con); /* error/fault path */ |
| 2348 | goto done_unlocked; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2349 | } |
| 2350 | |
| 2351 | |
| 2352 | /* |
| 2353 | * Generic error/fault handler. A retry mechanism is used with |
| 2354 | * exponential backoff |
| 2355 | */ |
| 2356 | static void ceph_fault(struct ceph_connection *con) |
Sage Weil | 8636ea6 | 2012-07-30 18:17:13 -0700 | [diff] [blame] | 2357 | __releases(con->mutex) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2358 | { |
| 2359 | pr_err("%s%lld %s %s\n", ENTITY_NAME(con->peer_name), |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 2360 | ceph_pr_addr(&con->peer_addr.in_addr), con->error_msg); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2361 | dout("fault %p state %lu to peer %s\n", |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 2362 | con, con->state, ceph_pr_addr(&con->peer_addr.in_addr)); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2363 | |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2364 | BUG_ON(con->state != CON_STATE_CONNECTING && |
| 2365 | con->state != CON_STATE_NEGOTIATING && |
| 2366 | con->state != CON_STATE_OPEN); |
Sage Weil | ec30264 | 2009-12-22 10:43:42 -0800 | [diff] [blame] | 2367 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2368 | con_close_socket(con); |
Sage Weil | 5e095e8 | 2009-12-14 14:30:34 -0800 | [diff] [blame] | 2369 | |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 2370 | if (test_bit(CON_FLAG_LOSSYTX, &con->flags)) { |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2371 | dout("fault on LOSSYTX channel, marking CLOSED\n"); |
| 2372 | con->state = CON_STATE_CLOSED; |
Sage Weil | 3b5ede0 | 2012-07-20 15:22:53 -0700 | [diff] [blame] | 2373 | goto out_unlock; |
| 2374 | } |
| 2375 | |
Sage Weil | 5e095e8 | 2009-12-14 14:30:34 -0800 | [diff] [blame] | 2376 | if (con->in_msg) { |
Alex Elder | 38941f8 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 2377 | BUG_ON(con->in_msg->con != con); |
| 2378 | con->in_msg->con = NULL; |
Sage Weil | 5e095e8 | 2009-12-14 14:30:34 -0800 | [diff] [blame] | 2379 | ceph_msg_put(con->in_msg); |
| 2380 | con->in_msg = NULL; |
Sage Weil | 36eb71a | 2012-06-21 12:47:08 -0700 | [diff] [blame] | 2381 | con->ops->put(con); |
Sage Weil | 5e095e8 | 2009-12-14 14:30:34 -0800 | [diff] [blame] | 2382 | } |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2383 | |
Sage Weil | e80a52d | 2010-02-25 12:40:45 -0800 | [diff] [blame] | 2384 | /* Requeue anything that hasn't been acked */ |
| 2385 | list_splice_init(&con->out_sent, &con->out_queue); |
Sage Weil | 9bd2e6f | 2010-02-02 16:21:06 -0800 | [diff] [blame] | 2386 | |
Sage Weil | e76661d | 2011-03-03 10:10:15 -0800 | [diff] [blame] | 2387 | /* If there are no messages queued or keepalive pending, place |
| 2388 | * the connection in a STANDBY state */ |
| 2389 | if (list_empty(&con->out_queue) && |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 2390 | !test_bit(CON_FLAG_KEEPALIVE_PENDING, &con->flags)) { |
Sage Weil | e00de34 | 2011-03-04 12:25:05 -0800 | [diff] [blame] | 2391 | dout("fault %p setting STANDBY clearing WRITE_PENDING\n", con); |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 2392 | clear_bit(CON_FLAG_WRITE_PENDING, &con->flags); |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2393 | con->state = CON_STATE_STANDBY; |
Sage Weil | e80a52d | 2010-02-25 12:40:45 -0800 | [diff] [blame] | 2394 | } else { |
| 2395 | /* retry after a delay. */ |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2396 | con->state = CON_STATE_PREOPEN; |
Sage Weil | e80a52d | 2010-02-25 12:40:45 -0800 | [diff] [blame] | 2397 | if (con->delay == 0) |
| 2398 | con->delay = BASE_DELAY_INTERVAL; |
| 2399 | else if (con->delay < MAX_DELAY_INTERVAL) |
| 2400 | con->delay *= 2; |
Sage Weil | e80a52d | 2010-02-25 12:40:45 -0800 | [diff] [blame] | 2401 | con->ops->get(con); |
| 2402 | if (queue_delayed_work(ceph_msgr_wq, &con->work, |
Sage Weil | 60bf8bf | 2011-03-04 12:24:28 -0800 | [diff] [blame] | 2403 | round_jiffies_relative(con->delay))) { |
| 2404 | dout("fault queued %p delay %lu\n", con, con->delay); |
| 2405 | } else { |
Sage Weil | e80a52d | 2010-02-25 12:40:45 -0800 | [diff] [blame] | 2406 | con->ops->put(con); |
Sage Weil | 60bf8bf | 2011-03-04 12:24:28 -0800 | [diff] [blame] | 2407 | dout("fault failed to queue %p delay %lu, backoff\n", |
| 2408 | con, con->delay); |
| 2409 | /* |
| 2410 | * In many cases we see a socket state change |
| 2411 | * while con_work is running and end up |
| 2412 | * queuing (non-delayed) work, such that we |
| 2413 | * can't backoff with a delay. Set a flag so |
| 2414 | * that when con_work restarts we schedule the |
| 2415 | * delay then. |
| 2416 | */ |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 2417 | set_bit(CON_FLAG_BACKOFF, &con->flags); |
Sage Weil | 60bf8bf | 2011-03-04 12:24:28 -0800 | [diff] [blame] | 2418 | } |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2419 | } |
| 2420 | |
Sage Weil | 91e45ce3 | 2010-02-15 12:05:09 -0800 | [diff] [blame] | 2421 | out_unlock: |
| 2422 | mutex_unlock(&con->mutex); |
Sage Weil | 161fd65 | 2010-02-25 12:38:57 -0800 | [diff] [blame] | 2423 | /* |
| 2424 | * in case we faulted due to authentication, invalidate our |
| 2425 | * current tickets so that we can get new ones. |
Sage Weil | 213c99e | 2010-08-03 10:25:11 -0700 | [diff] [blame] | 2426 | */ |
Sage Weil | 161fd65 | 2010-02-25 12:38:57 -0800 | [diff] [blame] | 2427 | if (con->auth_retry && con->ops->invalidate_authorizer) { |
| 2428 | dout("calling invalidate_authorizer()\n"); |
| 2429 | con->ops->invalidate_authorizer(con); |
| 2430 | } |
| 2431 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2432 | if (con->ops->fault) |
| 2433 | con->ops->fault(con); |
| 2434 | } |
| 2435 | |
| 2436 | |
| 2437 | |
| 2438 | /* |
Alex Elder | 15d9882 | 2012-05-26 23:26:43 -0500 | [diff] [blame] | 2439 | * initialize a new messenger instance |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2440 | */ |
Alex Elder | 15d9882 | 2012-05-26 23:26:43 -0500 | [diff] [blame] | 2441 | void ceph_messenger_init(struct ceph_messenger *msgr, |
| 2442 | struct ceph_entity_addr *myaddr, |
| 2443 | u32 supported_features, |
| 2444 | u32 required_features, |
| 2445 | bool nocrc) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2446 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 2447 | msgr->supported_features = supported_features; |
| 2448 | msgr->required_features = required_features; |
| 2449 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2450 | spin_lock_init(&msgr->global_seq_lock); |
| 2451 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2452 | if (myaddr) |
| 2453 | msgr->inst.addr = *myaddr; |
| 2454 | |
| 2455 | /* select a random nonce */ |
Sage Weil | ac8839d | 2010-01-27 14:28:10 -0800 | [diff] [blame] | 2456 | msgr->inst.addr.type = 0; |
Sage Weil | 103e2d3 | 2010-01-07 16:12:36 -0800 | [diff] [blame] | 2457 | get_random_bytes(&msgr->inst.addr.nonce, sizeof(msgr->inst.addr.nonce)); |
Sage Weil | 63f2d21 | 2009-11-03 15:17:56 -0800 | [diff] [blame] | 2458 | encode_my_addr(msgr); |
Alex Elder | 15d9882 | 2012-05-26 23:26:43 -0500 | [diff] [blame] | 2459 | msgr->nocrc = nocrc; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2460 | |
Guanjun He | a2a3258 | 2012-07-08 19:50:33 -0700 | [diff] [blame] | 2461 | atomic_set(&msgr->stopping, 0); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2462 | |
Alex Elder | 15d9882 | 2012-05-26 23:26:43 -0500 | [diff] [blame] | 2463 | dout("%s %p\n", __func__, msgr); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2464 | } |
Alex Elder | 15d9882 | 2012-05-26 23:26:43 -0500 | [diff] [blame] | 2465 | EXPORT_SYMBOL(ceph_messenger_init); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2466 | |
Sage Weil | e00de34 | 2011-03-04 12:25:05 -0800 | [diff] [blame] | 2467 | static void clear_standby(struct ceph_connection *con) |
| 2468 | { |
| 2469 | /* come back from STANDBY? */ |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2470 | if (con->state == CON_STATE_STANDBY) { |
Sage Weil | e00de34 | 2011-03-04 12:25:05 -0800 | [diff] [blame] | 2471 | dout("clear_standby %p and ++connect_seq\n", con); |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2472 | con->state = CON_STATE_PREOPEN; |
Sage Weil | e00de34 | 2011-03-04 12:25:05 -0800 | [diff] [blame] | 2473 | con->connect_seq++; |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 2474 | WARN_ON(test_bit(CON_FLAG_WRITE_PENDING, &con->flags)); |
| 2475 | WARN_ON(test_bit(CON_FLAG_KEEPALIVE_PENDING, &con->flags)); |
Sage Weil | e00de34 | 2011-03-04 12:25:05 -0800 | [diff] [blame] | 2476 | } |
| 2477 | } |
| 2478 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2479 | /* |
| 2480 | * Queue up an outgoing message on the given connection. |
| 2481 | */ |
| 2482 | void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg) |
| 2483 | { |
Sage Weil | a59b55a | 2012-07-20 15:34:04 -0700 | [diff] [blame] | 2484 | /* set src+dst */ |
| 2485 | msg->hdr.src = con->msgr->inst.name; |
| 2486 | BUG_ON(msg->front.iov_len != le32_to_cpu(msg->hdr.front_len)); |
| 2487 | msg->needs_out_seq = true; |
| 2488 | |
| 2489 | mutex_lock(&con->mutex); |
| 2490 | |
Sage Weil | 8dacc7d | 2012-07-20 17:24:40 -0700 | [diff] [blame] | 2491 | if (con->state == CON_STATE_CLOSED) { |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2492 | dout("con_send %p closed, dropping %p\n", con, msg); |
| 2493 | ceph_msg_put(msg); |
Sage Weil | a59b55a | 2012-07-20 15:34:04 -0700 | [diff] [blame] | 2494 | mutex_unlock(&con->mutex); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2495 | return; |
| 2496 | } |
| 2497 | |
Alex Elder | 38941f8 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 2498 | BUG_ON(msg->con != NULL); |
Sage Weil | 36eb71a | 2012-06-21 12:47:08 -0700 | [diff] [blame] | 2499 | msg->con = con->ops->get(con); |
Alex Elder | 92ce034 | 2012-06-04 14:43:33 -0500 | [diff] [blame] | 2500 | BUG_ON(msg->con == NULL); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2501 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2502 | BUG_ON(!list_empty(&msg->list_head)); |
| 2503 | list_add_tail(&msg->list_head, &con->out_queue); |
| 2504 | dout("----- %p to %s%lld %d=%s len %d+%d+%d -----\n", msg, |
| 2505 | ENTITY_NAME(con->peer_name), le16_to_cpu(msg->hdr.type), |
| 2506 | ceph_msg_type_name(le16_to_cpu(msg->hdr.type)), |
| 2507 | le32_to_cpu(msg->hdr.front_len), |
| 2508 | le32_to_cpu(msg->hdr.middle_len), |
| 2509 | le32_to_cpu(msg->hdr.data_len)); |
Sage Weil | 0065093 | 2012-07-20 15:33:04 -0700 | [diff] [blame] | 2510 | |
| 2511 | clear_standby(con); |
Sage Weil | ec30264 | 2009-12-22 10:43:42 -0800 | [diff] [blame] | 2512 | mutex_unlock(&con->mutex); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2513 | |
| 2514 | /* if there wasn't anything waiting to send before, queue |
| 2515 | * new work */ |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 2516 | if (test_and_set_bit(CON_FLAG_WRITE_PENDING, &con->flags) == 0) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2517 | queue_con(con); |
| 2518 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 2519 | EXPORT_SYMBOL(ceph_con_send); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2520 | |
| 2521 | /* |
| 2522 | * Revoke a message that was previously queued for send |
| 2523 | */ |
Alex Elder | 6740a84 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 2524 | void ceph_msg_revoke(struct ceph_msg *msg) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2525 | { |
Alex Elder | 6740a84 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 2526 | struct ceph_connection *con = msg->con; |
| 2527 | |
| 2528 | if (!con) |
| 2529 | return; /* Message not in our possession */ |
| 2530 | |
Sage Weil | ec30264 | 2009-12-22 10:43:42 -0800 | [diff] [blame] | 2531 | mutex_lock(&con->mutex); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2532 | if (!list_empty(&msg->list_head)) { |
Alex Elder | 38941f8 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 2533 | dout("%s %p msg %p - was on queue\n", __func__, con, msg); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2534 | list_del_init(&msg->list_head); |
Alex Elder | 38941f8 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 2535 | BUG_ON(msg->con == NULL); |
Sage Weil | 36eb71a | 2012-06-21 12:47:08 -0700 | [diff] [blame] | 2536 | msg->con->ops->put(msg->con); |
Alex Elder | 38941f8 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 2537 | msg->con = NULL; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2538 | msg->hdr.seq = 0; |
Alex Elder | 38941f8 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 2539 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2540 | ceph_msg_put(msg); |
Sage Weil | ed98ada | 2010-07-05 12:15:14 -0700 | [diff] [blame] | 2541 | } |
| 2542 | if (con->out_msg == msg) { |
Alex Elder | 38941f8 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 2543 | dout("%s %p msg %p - was sending\n", __func__, con, msg); |
Sage Weil | ed98ada | 2010-07-05 12:15:14 -0700 | [diff] [blame] | 2544 | con->out_msg = NULL; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2545 | if (con->out_kvec_is_msg) { |
| 2546 | con->out_skip = con->out_kvec_bytes; |
| 2547 | con->out_kvec_is_msg = false; |
| 2548 | } |
Sage Weil | ed98ada | 2010-07-05 12:15:14 -0700 | [diff] [blame] | 2549 | msg->hdr.seq = 0; |
Alex Elder | 92ce034 | 2012-06-04 14:43:33 -0500 | [diff] [blame] | 2550 | |
| 2551 | ceph_msg_put(msg); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2552 | } |
Sage Weil | ec30264 | 2009-12-22 10:43:42 -0800 | [diff] [blame] | 2553 | mutex_unlock(&con->mutex); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2554 | } |
| 2555 | |
| 2556 | /* |
Yehuda Sadeh | 0d59ab8 | 2010-01-13 17:03:23 -0800 | [diff] [blame] | 2557 | * Revoke a message that we may be reading data into |
Sage Weil | 350b1c3 | 2009-12-22 10:45:45 -0800 | [diff] [blame] | 2558 | */ |
Alex Elder | 8921d11 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 2559 | void ceph_msg_revoke_incoming(struct ceph_msg *msg) |
Sage Weil | 350b1c3 | 2009-12-22 10:45:45 -0800 | [diff] [blame] | 2560 | { |
Alex Elder | 8921d11 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 2561 | struct ceph_connection *con; |
| 2562 | |
| 2563 | BUG_ON(msg == NULL); |
| 2564 | if (!msg->con) { |
| 2565 | dout("%s msg %p null con\n", __func__, msg); |
| 2566 | |
| 2567 | return; /* Message not in our possession */ |
| 2568 | } |
| 2569 | |
| 2570 | con = msg->con; |
Sage Weil | 350b1c3 | 2009-12-22 10:45:45 -0800 | [diff] [blame] | 2571 | mutex_lock(&con->mutex); |
Alex Elder | 8921d11 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 2572 | if (con->in_msg == msg) { |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2573 | unsigned int front_len = le32_to_cpu(con->in_hdr.front_len); |
| 2574 | unsigned int middle_len = le32_to_cpu(con->in_hdr.middle_len); |
| 2575 | unsigned int data_len = le32_to_cpu(con->in_hdr.data_len); |
Sage Weil | 350b1c3 | 2009-12-22 10:45:45 -0800 | [diff] [blame] | 2576 | |
| 2577 | /* skip rest of message */ |
Alex Elder | 8921d11 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 2578 | dout("%s %p msg %p revoked\n", __func__, con, msg); |
| 2579 | con->in_base_pos = con->in_base_pos - |
Sage Weil | 350b1c3 | 2009-12-22 10:45:45 -0800 | [diff] [blame] | 2580 | sizeof(struct ceph_msg_header) - |
Yehuda Sadeh | 0d59ab8 | 2010-01-13 17:03:23 -0800 | [diff] [blame] | 2581 | front_len - |
| 2582 | middle_len - |
| 2583 | data_len - |
Sage Weil | 350b1c3 | 2009-12-22 10:45:45 -0800 | [diff] [blame] | 2584 | sizeof(struct ceph_msg_footer); |
Sage Weil | 350b1c3 | 2009-12-22 10:45:45 -0800 | [diff] [blame] | 2585 | ceph_msg_put(con->in_msg); |
| 2586 | con->in_msg = NULL; |
| 2587 | con->in_tag = CEPH_MSGR_TAG_READY; |
Sage Weil | 684be25 | 2010-04-21 20:45:59 -0700 | [diff] [blame] | 2588 | con->in_seq++; |
Sage Weil | 350b1c3 | 2009-12-22 10:45:45 -0800 | [diff] [blame] | 2589 | } else { |
Alex Elder | 8921d11 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 2590 | dout("%s %p in_msg %p msg %p no-op\n", |
| 2591 | __func__, con, con->in_msg, msg); |
Sage Weil | 350b1c3 | 2009-12-22 10:45:45 -0800 | [diff] [blame] | 2592 | } |
| 2593 | mutex_unlock(&con->mutex); |
| 2594 | } |
| 2595 | |
| 2596 | /* |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2597 | * Queue a keepalive byte to ensure the tcp connection is alive. |
| 2598 | */ |
| 2599 | void ceph_con_keepalive(struct ceph_connection *con) |
| 2600 | { |
Sage Weil | e00de34 | 2011-03-04 12:25:05 -0800 | [diff] [blame] | 2601 | dout("con_keepalive %p\n", con); |
Sage Weil | 0065093 | 2012-07-20 15:33:04 -0700 | [diff] [blame] | 2602 | mutex_lock(&con->mutex); |
Sage Weil | e00de34 | 2011-03-04 12:25:05 -0800 | [diff] [blame] | 2603 | clear_standby(con); |
Sage Weil | 0065093 | 2012-07-20 15:33:04 -0700 | [diff] [blame] | 2604 | mutex_unlock(&con->mutex); |
Sage Weil | 4a86169 | 2012-07-20 17:29:55 -0700 | [diff] [blame] | 2605 | if (test_and_set_bit(CON_FLAG_KEEPALIVE_PENDING, &con->flags) == 0 && |
| 2606 | test_and_set_bit(CON_FLAG_WRITE_PENDING, &con->flags) == 0) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2607 | queue_con(con); |
| 2608 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 2609 | EXPORT_SYMBOL(ceph_con_keepalive); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2610 | |
| 2611 | |
| 2612 | /* |
| 2613 | * construct a new message with given type, size |
| 2614 | * the new msg has a ref count of 1. |
| 2615 | */ |
Sage Weil | b61c276 | 2011-08-09 15:03:46 -0700 | [diff] [blame] | 2616 | struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags, |
| 2617 | bool can_fail) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2618 | { |
| 2619 | struct ceph_msg *m; |
| 2620 | |
Yehuda Sadeh | 34d2376 | 2010-04-06 14:33:58 -0700 | [diff] [blame] | 2621 | m = kmalloc(sizeof(*m), flags); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2622 | if (m == NULL) |
| 2623 | goto out; |
Sage Weil | c2e552e | 2009-12-07 15:55:05 -0800 | [diff] [blame] | 2624 | kref_init(&m->kref); |
Alex Elder | 38941f8 | 2012-06-01 14:56:43 -0500 | [diff] [blame] | 2625 | |
| 2626 | m->con = NULL; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2627 | INIT_LIST_HEAD(&m->list_head); |
| 2628 | |
Sage Weil | 45c6ceb | 2010-05-11 15:01:51 -0700 | [diff] [blame] | 2629 | m->hdr.tid = 0; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2630 | m->hdr.type = cpu_to_le16(type); |
Sage Weil | 45c6ceb | 2010-05-11 15:01:51 -0700 | [diff] [blame] | 2631 | m->hdr.priority = cpu_to_le16(CEPH_MSG_PRIO_DEFAULT); |
| 2632 | m->hdr.version = 0; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2633 | m->hdr.front_len = cpu_to_le32(front_len); |
| 2634 | m->hdr.middle_len = 0; |
Sage Weil | bb25766 | 2010-04-01 16:07:23 -0700 | [diff] [blame] | 2635 | m->hdr.data_len = 0; |
| 2636 | m->hdr.data_off = 0; |
Sage Weil | 45c6ceb | 2010-05-11 15:01:51 -0700 | [diff] [blame] | 2637 | m->hdr.reserved = 0; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2638 | m->footer.front_crc = 0; |
| 2639 | m->footer.middle_crc = 0; |
| 2640 | m->footer.data_crc = 0; |
Sage Weil | 45c6ceb | 2010-05-11 15:01:51 -0700 | [diff] [blame] | 2641 | m->footer.flags = 0; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2642 | m->front_max = front_len; |
| 2643 | m->front_is_vmalloc = false; |
| 2644 | m->more_to_follow = false; |
Jim Schutt | c0d5f9d | 2011-09-16 08:27:31 -0600 | [diff] [blame] | 2645 | m->ack_stamp = 0; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2646 | m->pool = NULL; |
| 2647 | |
Henry C Chang | ca20892 | 2011-05-03 02:29:56 +0000 | [diff] [blame] | 2648 | /* middle */ |
| 2649 | m->middle = NULL; |
| 2650 | |
| 2651 | /* data */ |
| 2652 | m->nr_pages = 0; |
| 2653 | m->page_alignment = 0; |
| 2654 | m->pages = NULL; |
| 2655 | m->pagelist = NULL; |
| 2656 | m->bio = NULL; |
| 2657 | m->bio_iter = NULL; |
| 2658 | m->bio_seg = 0; |
| 2659 | m->trail = NULL; |
| 2660 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2661 | /* front */ |
| 2662 | if (front_len) { |
| 2663 | if (front_len > PAGE_CACHE_SIZE) { |
Yehuda Sadeh | 34d2376 | 2010-04-06 14:33:58 -0700 | [diff] [blame] | 2664 | m->front.iov_base = __vmalloc(front_len, flags, |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2665 | PAGE_KERNEL); |
| 2666 | m->front_is_vmalloc = true; |
| 2667 | } else { |
Yehuda Sadeh | 34d2376 | 2010-04-06 14:33:58 -0700 | [diff] [blame] | 2668 | m->front.iov_base = kmalloc(front_len, flags); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2669 | } |
| 2670 | if (m->front.iov_base == NULL) { |
Sage Weil | b61c276 | 2011-08-09 15:03:46 -0700 | [diff] [blame] | 2671 | dout("ceph_msg_new can't allocate %d bytes\n", |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2672 | front_len); |
| 2673 | goto out2; |
| 2674 | } |
| 2675 | } else { |
| 2676 | m->front.iov_base = NULL; |
| 2677 | } |
| 2678 | m->front.iov_len = front_len; |
| 2679 | |
Sage Weil | bb25766 | 2010-04-01 16:07:23 -0700 | [diff] [blame] | 2680 | dout("ceph_msg_new %p front %d\n", m, front_len); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2681 | return m; |
| 2682 | |
| 2683 | out2: |
| 2684 | ceph_msg_put(m); |
| 2685 | out: |
Sage Weil | b61c276 | 2011-08-09 15:03:46 -0700 | [diff] [blame] | 2686 | if (!can_fail) { |
| 2687 | pr_err("msg_new can't create type %d front %d\n", type, |
| 2688 | front_len); |
Sage Weil | f0ed1b7 | 2011-08-09 15:05:07 -0700 | [diff] [blame] | 2689 | WARN_ON(1); |
Sage Weil | b61c276 | 2011-08-09 15:03:46 -0700 | [diff] [blame] | 2690 | } else { |
| 2691 | dout("msg_new can't create type %d front %d\n", type, |
| 2692 | front_len); |
| 2693 | } |
Sage Weil | a79832f | 2010-04-01 16:06:19 -0700 | [diff] [blame] | 2694 | return NULL; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2695 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 2696 | EXPORT_SYMBOL(ceph_msg_new); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2697 | |
| 2698 | /* |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2699 | * Allocate "middle" portion of a message, if it is needed and wasn't |
| 2700 | * allocated by alloc_msg. This allows us to read a small fixed-size |
| 2701 | * per-type header in the front and then gracefully fail (i.e., |
| 2702 | * propagate the error to the caller based on info in the front) when |
| 2703 | * the middle is too large. |
| 2704 | */ |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 2705 | static int ceph_alloc_middle(struct ceph_connection *con, struct ceph_msg *msg) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2706 | { |
| 2707 | int type = le16_to_cpu(msg->hdr.type); |
| 2708 | int middle_len = le32_to_cpu(msg->hdr.middle_len); |
| 2709 | |
| 2710 | dout("alloc_middle %p type %d %s middle_len %d\n", msg, type, |
| 2711 | ceph_msg_type_name(type), middle_len); |
| 2712 | BUG_ON(!middle_len); |
| 2713 | BUG_ON(msg->middle); |
| 2714 | |
Sage Weil | b6c1d5b | 2009-12-07 12:17:17 -0800 | [diff] [blame] | 2715 | msg->middle = ceph_buffer_new(middle_len, GFP_NOFS); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2716 | if (!msg->middle) |
| 2717 | return -ENOMEM; |
| 2718 | return 0; |
| 2719 | } |
| 2720 | |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 2721 | /* |
Alex Elder | 1c20f2d | 2012-06-04 14:43:32 -0500 | [diff] [blame] | 2722 | * Allocate a message for receiving an incoming message on a |
| 2723 | * connection, and save the result in con->in_msg. Uses the |
| 2724 | * connection's private alloc_msg op if available. |
| 2725 | * |
Sage Weil | 4740a62 | 2012-07-30 18:19:30 -0700 | [diff] [blame] | 2726 | * Returns 0 on success, or a negative error code. |
| 2727 | * |
| 2728 | * On success, if we set *skip = 1: |
| 2729 | * - the next message should be skipped and ignored. |
| 2730 | * - con->in_msg == NULL |
| 2731 | * or if we set *skip = 0: |
| 2732 | * - con->in_msg is non-null. |
| 2733 | * On error (ENOMEM, EAGAIN, ...), |
| 2734 | * - con->in_msg == NULL |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 2735 | */ |
Sage Weil | 4740a62 | 2012-07-30 18:19:30 -0700 | [diff] [blame] | 2736 | static int ceph_con_in_msg_alloc(struct ceph_connection *con, int *skip) |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 2737 | { |
Sage Weil | 4740a62 | 2012-07-30 18:19:30 -0700 | [diff] [blame] | 2738 | struct ceph_msg_header *hdr = &con->in_hdr; |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 2739 | int type = le16_to_cpu(hdr->type); |
| 2740 | int front_len = le32_to_cpu(hdr->front_len); |
| 2741 | int middle_len = le32_to_cpu(hdr->middle_len); |
Sage Weil | 4740a62 | 2012-07-30 18:19:30 -0700 | [diff] [blame] | 2742 | int ret = 0; |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 2743 | |
Alex Elder | 1c20f2d | 2012-06-04 14:43:32 -0500 | [diff] [blame] | 2744 | BUG_ON(con->in_msg != NULL); |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 2745 | |
| 2746 | if (con->ops->alloc_msg) { |
Sage Weil | 6139919 | 2012-07-30 18:19:45 -0700 | [diff] [blame] | 2747 | struct ceph_msg *msg; |
| 2748 | |
Yehuda Sadeh | 0547a9b | 2010-01-11 14:47:13 -0800 | [diff] [blame] | 2749 | mutex_unlock(&con->mutex); |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 2750 | msg = con->ops->alloc_msg(con, hdr, skip); |
Yehuda Sadeh | 0547a9b | 2010-01-11 14:47:13 -0800 | [diff] [blame] | 2751 | mutex_lock(&con->mutex); |
Sage Weil | 6139919 | 2012-07-30 18:19:45 -0700 | [diff] [blame] | 2752 | if (con->state != CON_STATE_OPEN) { |
Sage Weil | 9bd95261 | 2012-10-24 16:12:58 -0700 | [diff] [blame] | 2753 | if (msg) |
| 2754 | ceph_msg_put(msg); |
Sage Weil | 6139919 | 2012-07-30 18:19:45 -0700 | [diff] [blame] | 2755 | return -EAGAIN; |
| 2756 | } |
| 2757 | con->in_msg = msg; |
Alex Elder | 92ce034 | 2012-06-04 14:43:33 -0500 | [diff] [blame] | 2758 | if (con->in_msg) { |
Sage Weil | 36eb71a | 2012-06-21 12:47:08 -0700 | [diff] [blame] | 2759 | con->in_msg->con = con->ops->get(con); |
Alex Elder | 92ce034 | 2012-06-04 14:43:33 -0500 | [diff] [blame] | 2760 | BUG_ON(con->in_msg->con == NULL); |
| 2761 | } |
Sage Weil | 4740a62 | 2012-07-30 18:19:30 -0700 | [diff] [blame] | 2762 | if (*skip) { |
Alex Elder | 1c20f2d | 2012-06-04 14:43:32 -0500 | [diff] [blame] | 2763 | con->in_msg = NULL; |
Sage Weil | 4740a62 | 2012-07-30 18:19:30 -0700 | [diff] [blame] | 2764 | return 0; |
| 2765 | } |
| 2766 | if (!con->in_msg) { |
| 2767 | con->error_msg = |
| 2768 | "error allocating memory for incoming message"; |
| 2769 | return -ENOMEM; |
| 2770 | } |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 2771 | } |
Alex Elder | 1c20f2d | 2012-06-04 14:43:32 -0500 | [diff] [blame] | 2772 | if (!con->in_msg) { |
| 2773 | con->in_msg = ceph_msg_new(type, front_len, GFP_NOFS, false); |
| 2774 | if (!con->in_msg) { |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 2775 | pr_err("unable to allocate msg type %d len %d\n", |
| 2776 | type, front_len); |
Sage Weil | 4740a62 | 2012-07-30 18:19:30 -0700 | [diff] [blame] | 2777 | return -ENOMEM; |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 2778 | } |
Sage Weil | 36eb71a | 2012-06-21 12:47:08 -0700 | [diff] [blame] | 2779 | con->in_msg->con = con->ops->get(con); |
Alex Elder | 92ce034 | 2012-06-04 14:43:33 -0500 | [diff] [blame] | 2780 | BUG_ON(con->in_msg->con == NULL); |
Alex Elder | 1c20f2d | 2012-06-04 14:43:32 -0500 | [diff] [blame] | 2781 | con->in_msg->page_alignment = le16_to_cpu(hdr->data_off); |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 2782 | } |
Alex Elder | 1c20f2d | 2012-06-04 14:43:32 -0500 | [diff] [blame] | 2783 | memcpy(&con->in_msg->hdr, &con->in_hdr, sizeof(con->in_hdr)); |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 2784 | |
Alex Elder | 1c20f2d | 2012-06-04 14:43:32 -0500 | [diff] [blame] | 2785 | if (middle_len && !con->in_msg->middle) { |
| 2786 | ret = ceph_alloc_middle(con, con->in_msg); |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 2787 | if (ret < 0) { |
Alex Elder | 1c20f2d | 2012-06-04 14:43:32 -0500 | [diff] [blame] | 2788 | ceph_msg_put(con->in_msg); |
| 2789 | con->in_msg = NULL; |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 2790 | } |
| 2791 | } |
Yehuda Sadeh | 9d7f0f1 | 2010-01-11 10:32:02 -0800 | [diff] [blame] | 2792 | |
Sage Weil | 4740a62 | 2012-07-30 18:19:30 -0700 | [diff] [blame] | 2793 | return ret; |
Yehuda Sadeh | 2450418 | 2010-01-08 13:58:34 -0800 | [diff] [blame] | 2794 | } |
| 2795 | |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2796 | |
| 2797 | /* |
| 2798 | * Free a generically kmalloc'd message. |
| 2799 | */ |
| 2800 | void ceph_msg_kfree(struct ceph_msg *m) |
| 2801 | { |
| 2802 | dout("msg_kfree %p\n", m); |
| 2803 | if (m->front_is_vmalloc) |
| 2804 | vfree(m->front.iov_base); |
| 2805 | else |
| 2806 | kfree(m->front.iov_base); |
| 2807 | kfree(m); |
| 2808 | } |
| 2809 | |
| 2810 | /* |
| 2811 | * Drop a msg ref. Destroy as needed. |
| 2812 | */ |
Sage Weil | c2e552e | 2009-12-07 15:55:05 -0800 | [diff] [blame] | 2813 | void ceph_msg_last_put(struct kref *kref) |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2814 | { |
Sage Weil | c2e552e | 2009-12-07 15:55:05 -0800 | [diff] [blame] | 2815 | struct ceph_msg *m = container_of(kref, struct ceph_msg, kref); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2816 | |
Sage Weil | c2e552e | 2009-12-07 15:55:05 -0800 | [diff] [blame] | 2817 | dout("ceph_msg_put last one on %p\n", m); |
| 2818 | WARN_ON(!list_empty(&m->list_head)); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2819 | |
Sage Weil | c2e552e | 2009-12-07 15:55:05 -0800 | [diff] [blame] | 2820 | /* drop middle, data, if any */ |
| 2821 | if (m->middle) { |
| 2822 | ceph_buffer_put(m->middle); |
| 2823 | m->middle = NULL; |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2824 | } |
Sage Weil | c2e552e | 2009-12-07 15:55:05 -0800 | [diff] [blame] | 2825 | m->nr_pages = 0; |
| 2826 | m->pages = NULL; |
| 2827 | |
Sage Weil | 58bb3b3 | 2009-12-23 12:12:31 -0800 | [diff] [blame] | 2828 | if (m->pagelist) { |
| 2829 | ceph_pagelist_release(m->pagelist); |
| 2830 | kfree(m->pagelist); |
| 2831 | m->pagelist = NULL; |
| 2832 | } |
| 2833 | |
Yehuda Sadeh | 68b4476 | 2010-04-06 15:01:27 -0700 | [diff] [blame] | 2834 | m->trail = NULL; |
| 2835 | |
Sage Weil | c2e552e | 2009-12-07 15:55:05 -0800 | [diff] [blame] | 2836 | if (m->pool) |
| 2837 | ceph_msgpool_put(m->pool, m); |
| 2838 | else |
| 2839 | ceph_msg_kfree(m); |
Sage Weil | 31b8006 | 2009-10-06 11:31:13 -0700 | [diff] [blame] | 2840 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 2841 | EXPORT_SYMBOL(ceph_msg_last_put); |
Sage Weil | 9ec7cab | 2009-12-14 15:13:47 -0800 | [diff] [blame] | 2842 | |
| 2843 | void ceph_msg_dump(struct ceph_msg *msg) |
| 2844 | { |
| 2845 | pr_debug("msg_dump %p (front_max %d nr_pages %d)\n", msg, |
| 2846 | msg->front_max, msg->nr_pages); |
| 2847 | print_hex_dump(KERN_DEBUG, "header: ", |
| 2848 | DUMP_PREFIX_OFFSET, 16, 1, |
| 2849 | &msg->hdr, sizeof(msg->hdr), true); |
| 2850 | print_hex_dump(KERN_DEBUG, " front: ", |
| 2851 | DUMP_PREFIX_OFFSET, 16, 1, |
| 2852 | msg->front.iov_base, msg->front.iov_len, true); |
| 2853 | if (msg->middle) |
| 2854 | print_hex_dump(KERN_DEBUG, "middle: ", |
| 2855 | DUMP_PREFIX_OFFSET, 16, 1, |
| 2856 | msg->middle->vec.iov_base, |
| 2857 | msg->middle->vec.iov_len, true); |
| 2858 | print_hex_dump(KERN_DEBUG, "footer: ", |
| 2859 | DUMP_PREFIX_OFFSET, 16, 1, |
| 2860 | &msg->footer, sizeof(msg->footer), true); |
| 2861 | } |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 2862 | EXPORT_SYMBOL(ceph_msg_dump); |