2 * Copyright (C) Joerg Lenneis 2003
3 * All Rights Reserved. See COPYING.
8 #endif /* HAVE_CONFIG_H */
10 #ifdef CNID_BACKEND_DBD
13 #ifdef HAVE_SYS_STAT_H
15 #endif /* HAVE_SYS_STAT_H */
18 #endif /* HAVE_SYS_UIO_H */
24 #include <sys/socket.h>
25 #include <sys/param.h>
27 #include <netinet/in.h>
29 #include <netinet/tcp.h>
30 #include <netinet/in.h>
31 #include <arpa/inet.h>
36 #include <netatalk/endian.h>
37 #include <atalk/logger.h>
38 #include <atalk/adouble.h>
39 #include <atalk/cnid.h>
40 #include <atalk/cnid_dbd_private.h>
41 #include <atalk/util.h>
46 #define SOL_TCP IPPROTO_TCP
47 #endif /* ! SOL_TCP */
49 /* Wait MAX_DELAY seconds before a request to the CNID server times out */
52 static void RQST_RESET(struct cnid_dbd_rqst *r)
54 memset(r, 0, sizeof(struct cnid_dbd_rqst ));
57 static void delay(int sec)
63 select(0, NULL, NULL, NULL, &tv);
66 static int tsock_getfd(const char *host, const char *port)
71 struct addrinfo hints, *servinfo, *p;
73 /* Prepare hint for getaddrinfo */
74 memset(&hints, 0, sizeof hints);
75 hints.ai_family = AF_UNSPEC;
76 hints.ai_socktype = SOCK_STREAM;
77 hints.ai_flags = AI_NUMERICSERV;
79 if ((err = getaddrinfo(host, port, &hints, &servinfo)) != 0) {
80 LOG(log_error, logtype_default, "tsock_getfd: getaddrinfo: CNID server %s:%s : %s\n",
81 host, port, gai_strerror(err));
85 /* loop through all the results and bind to the first we can */
86 for (p = servinfo; p != NULL; p = p->ai_next) {
87 if ((sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1) {
88 LOG(log_info, logtype_default, "tsock_getfd: socket CNID server %s:: %s",
89 host, strerror(errno));
94 if (setsockopt(sock, SOL_TCP, TCP_NODELAY, &attr, sizeof(attr)) == -1) {
95 LOG(log_error, logtype_cnid, "getfd: set TCP_NODELAY CNID server %s: %s",
96 host, strerror(errno));
102 if (setnonblock(sock, 1) != 0) {
103 LOG(log_error, logtype_cnid, "getfd: setnonblock: %s", strerror(err));
109 if (connect(sock, p->ai_addr, p->ai_addrlen) == -1) {
110 if (errno == EINPROGRESS) {
113 tv.tv_sec = 5; /* give it five seconds ... */
117 if (select(sock + 1, NULL, &wfds, NULL, &tv) < 1) {
119 LOG(log_error, logtype_cnid, "getfd: select timed out for CNID server %s: %s",
120 host, strerror(errno));
126 socklen_t optlen = sizeof(optval);
127 if (getsockopt(sock, SOL_SOCKET, SO_ERROR, &optval, &optlen) != 0 || optval != 0) {
128 /* somethings still wrong */
129 LOG(log_error, logtype_cnid, "getfd: getsockopt error with CNID server %s: %s",
130 host, strerror(errno));
136 LOG(log_error, logtype_cnid, "getfd: connect CNID server %s: %s",
137 host, strerror(errno));
144 /* We've got a socket */
148 freeaddrinfo(servinfo);
151 LOG(log_error, logtype_cnid, "tsock_getfd: no suitable network config from CNID server %s:%s",
160 * Write "towrite" bytes using writev on non-blocking fd
162 * Every short write is considered an error, transmit can handle that.
164 * @param fd (r) socket fd which must be non-blocking
165 * @param iov (r) iovec for writev
166 * @param towrite (r) number of bytes in all iovec elements
167 * @param vecs (r) number of iovecs in array
169 * @returns "towrite" bytes written or -1 on error
171 static int write_vec(int fd, struct iovec *iov, ssize_t towrite, int vecs)
176 if (((len = writev(fd, iov, vecs)) == -1 && errno == EINTR))
179 if (len == towrite) /* wrote everything out */
183 LOG(log_error, logtype_cnid, "write_vec: short write: %s", strerror(errno));
185 LOG(log_error, logtype_cnid, "write_vec: short write: %d", len);
189 LOG(log_maxdebug, logtype_cnid, "write_vec: wrote %d bytes", len);
194 /* --------------------- */
195 static int init_tsock(CNID_private *db)
201 LOG(log_debug, logtype_cnid, "init_tsock: BEGIN. Opening volume '%s', CNID Server: %s/%s",
202 db->db_dir, db->cnidserver, db->cnidport);
204 if ((fd = tsock_getfd(db->cnidserver, db->cnidport)) < 0)
207 len = strlen(db->db_dir);
209 iov[0].iov_base = &len;
210 iov[0].iov_len = sizeof(int);
212 iov[1].iov_base = db->db_dir;
213 iov[1].iov_len = len;
215 if (write_vec(fd, iov, len + sizeof(int), 2) != len + sizeof(int)) {
216 LOG(log_error, logtype_cnid, "init_tsock: Error/short write: %s", strerror(errno));
221 LOG(log_debug, logtype_cnid, "init_tsock: ok");
226 /* --------------------- */
227 static int send_packet(CNID_private *db, struct cnid_dbd_rqst *rqst)
233 iov[0].iov_base = rqst;
234 iov[0].iov_len = sizeof(struct cnid_dbd_rqst);
235 towrite = sizeof(struct cnid_dbd_rqst);
239 iov[1].iov_base = rqst->name;
240 iov[1].iov_len = rqst->namelen;
241 towrite += rqst->namelen;
245 if (write_vec(db->fd, iov, towrite, vecs) != towrite) {
246 LOG(log_warning, logtype_cnid, "send_packet: Error writev rqst (db_dir %s): %s",
247 db->db_dir, strerror(errno));
251 LOG(log_maxdebug, logtype_cnid, "send_packet: {done}");
255 /* ------------------- */
256 static void dbd_initstamp(struct cnid_dbd_rqst *rqst)
259 rqst->op = CNID_DBD_OP_GETSTAMP;
262 /* ------------------- */
263 static int dbd_reply_stamp(struct cnid_dbd_rply *rply)
265 switch (rply->result) {
266 case CNID_DBD_RES_OK:
268 case CNID_DBD_RES_NOTFOUND:
270 case CNID_DBD_RES_ERR_DB:
279 * Non-blocking read "length" bytes within 1 second using select
281 * @param socket (r) must be nonblocking !
282 * @param data (rw) buffer for the read data
283 * @param lenght (r) how many bytes to read
285 * @returns number of bytes actually read or -1 on fatal error
287 static ssize_t read_packet(int socket, void *data, const size_t length)
297 while (stored < length) {
298 len = read(socket, (u_int8_t *) data + stored, length - stored);
308 FD_SET(socket, &rfds);
309 while ((ret = select(socket + 1, &rfds, NULL, NULL, &tv)) < 1) {
312 LOG(log_warning, logtype_cnid, "select timeout 1s");
315 LOG(log_error, logtype_cnid, "select: %s", strerror(errno));
321 LOG(log_error, logtype_cnid, "read: %s", strerror(errno));
332 /* ---------------------
333 * send a request and get reply
334 * assume send is non blocking
335 * if no answer after sometime (at least MAX_DELAY secondes) return an error
337 static int dbd_rpc(CNID_private *db, struct cnid_dbd_rqst *rqst, struct cnid_dbd_rply *rply)
343 if (send_packet(db, rqst) < 0) {
347 nametmp = rply->name;
349 ret = read_packet(db->fd, rply, sizeof(struct cnid_dbd_rply));
351 if (ret != sizeof(struct cnid_dbd_rply)) {
352 LOG(log_error, logtype_cnid, "dbd_rpc: Error reading header from fd (db_dir %s): %s",
353 db->db_dir, ret == -1?strerror(errno):"closed");
354 rply->name = nametmp;
357 rply->name = nametmp;
358 if (rply->namelen && rply->namelen > len) {
359 LOG(log_error, logtype_cnid,
360 "dbd_rpc: Error reading name (db_dir %s): %s name too long: %d. only wanted %d, garbage?",
361 db->db_dir, rply->name, rply->namelen, len);
364 if (rply->namelen && (ret = read_packet(db->fd, rply->name, rply->namelen)) != (ssize_t)rply->namelen) {
365 LOG(log_error, logtype_cnid, "dbd_rpc: Error reading name from fd (db_dir %s): %s",
366 db->db_dir, ret == -1?strerror(errno):"closed");
370 LOG(log_maxdebug, logtype_cnid, "dbd_rpc: {done}");
375 /* -------------------- */
376 static int transmit(CNID_private *db, struct cnid_dbd_rqst *rqst, struct cnid_dbd_rply *rply)
379 int clean = 1; /* no errors so far - to prevent sleep on first try */
382 /* volume and db don't have the same timestamp
388 struct cnid_dbd_rqst rqst_stamp;
389 struct cnid_dbd_rply rply_stamp;
390 char stamp[ADEDLEN_PRIVSYN];
392 LOG(log_maxdebug, logtype_cnid, "transmit: connecting to cnid_dbd ...");
393 if ((db->fd = init_tsock(db)) < 0) {
396 dbd_initstamp(&rqst_stamp);
397 memset(stamp, 0, ADEDLEN_PRIVSYN);
398 rply_stamp.name = stamp;
399 rply_stamp.namelen = ADEDLEN_PRIVSYN;
401 if (dbd_rpc(db, &rqst_stamp, &rply_stamp) < 0)
403 if (dbd_reply_stamp(&rply_stamp ) < 0)
407 LOG(log_debug7, logtype_cnid, "transmit: reconnected to cnid_dbd, comparing database stamps...");
408 if (memcmp(stamp, db->stamp, ADEDLEN_PRIVSYN)) {
409 LOG(log_error, logtype_cnid, "transmit: ... not the same db!");
413 LOG(log_debug7, logtype_cnid, "transmit: ... OK.");
414 } else { /* db->notfirst == 0 */
416 if (db->client_stamp)
417 memcpy(db->client_stamp, stamp, ADEDLEN_PRIVSYN);
418 memcpy(db->stamp, stamp, ADEDLEN_PRIVSYN);
420 LOG(log_debug, logtype_cnid, "transmit: attached to '%s', stamp: '%08lx'.",
421 db->db_dir, *(uint64_t *)stamp);
423 if (!dbd_rpc(db, rqst, rply)) {
424 LOG(log_maxdebug, logtype_cnid, "transmit: {done}");
430 db->fd = -1; /* FD not valid... will need to reconnect */
433 if (!clean) { /* don't sleep if just got disconnected by cnid server */
435 if (t - orig > MAX_DELAY) {
436 LOG(log_error, logtype_cnid, "transmit: Request to dbd daemon (db_dir %s) timed out.", db->db_dir);
439 /* sleep a little before retry */
442 clean = 0; /* false... next time sleep */
449 /* ---------------------- */
450 static struct _cnid_db *cnid_dbd_new(const char *volpath)
452 struct _cnid_db *cdb;
454 if ((cdb = (struct _cnid_db *)calloc(1, sizeof(struct _cnid_db))) == NULL)
457 if ((cdb->volpath = strdup(volpath)) == NULL) {
462 cdb->flags = CNID_FLAG_PERSISTENT | CNID_FLAG_LAZY_INIT;
464 cdb->cnid_add = cnid_dbd_add;
465 cdb->cnid_delete = cnid_dbd_delete;
466 cdb->cnid_get = cnid_dbd_get;
467 cdb->cnid_lookup = cnid_dbd_lookup;
468 cdb->cnid_nextid = NULL;
469 cdb->cnid_resolve = cnid_dbd_resolve;
470 cdb->cnid_getstamp = cnid_dbd_getstamp;
471 cdb->cnid_update = cnid_dbd_update;
472 cdb->cnid_rebuild_add = cnid_dbd_rebuild_add;
473 cdb->cnid_close = cnid_dbd_close;
478 /* ---------------------- */
479 struct _cnid_db *cnid_dbd_open(struct cnid_open_args *args)
481 CNID_private *db = NULL;
482 struct _cnid_db *cdb = NULL;
488 if ((cdb = cnid_dbd_new(args->dir)) == NULL) {
489 LOG(log_error, logtype_cnid, "cnid_open: Unable to allocate memory for database");
493 if ((db = (CNID_private *)calloc(1, sizeof(CNID_private))) == NULL) {
494 LOG(log_error, logtype_cnid, "cnid_open: Unable to allocate memory for database");
495 goto cnid_dbd_open_fail;
500 /* We keep a copy of the directory in the db structure so that we can
501 transparently reconnect later. */
502 strcpy(db->db_dir, args->dir);
503 db->magic = CNID_DB_MAGIC;
505 db->cnidserver = strdup(args->cnidserver);
506 db->cnidport = strdup(args->cnidport);
508 LOG(log_debug, logtype_cnid, "cnid_dbd_open: Finished initializing cnid dbd module for volume '%s'", db->db_dir);
514 if (cdb->volpath != NULL) {
525 /* ---------------------- */
526 void cnid_dbd_close(struct _cnid_db *cdb)
531 LOG(log_error, logtype_cnid, "cnid_close called with NULL argument !");
535 if ((db = cdb->_private) != NULL) {
536 LOG(log_debug, logtype_cnid, "closing database connection for volume '%s'", db->db_dir);
549 /* ---------------------- */
550 cnid_t cnid_dbd_add(struct _cnid_db *cdb, const struct stat *st,
551 const cnid_t did, char *name, const size_t len,
555 struct cnid_dbd_rqst rqst;
556 struct cnid_dbd_rply rply;
559 if (!cdb || !(db = cdb->_private) || !st || !name) {
560 LOG(log_error, logtype_cnid, "cnid_add: Parameter error");
561 errno = CNID_ERR_PARAM;
565 if (len > MAXPATHLEN) {
566 LOG(log_error, logtype_cnid, "cnid_add: Path name is too long");
567 errno = CNID_ERR_PATH;
572 rqst.op = CNID_DBD_OP_ADD;
574 if (!(cdb->flags & CNID_FLAG_NODEV)) {
575 rqst.dev = st->st_dev;
578 rqst.ino = st->st_ino;
579 rqst.type = S_ISDIR(st->st_mode)?1:0;
585 LOG(log_debug, logtype_cnid, "cnid_dbd_add: CNID: %u, name: '%s', inode: 0x%llx, type: %d (0=file, 1=dir)",
586 ntohl(did), name, (long long)st->st_ino, rqst.type);
589 if (transmit(db, &rqst, &rply) < 0) {
594 switch(rply.result) {
595 case CNID_DBD_RES_OK:
597 LOG(log_debug, logtype_cnid, "cnid_dbd_add: got CNID: %u", ntohl(id));
599 case CNID_DBD_RES_ERR_MAX:
600 errno = CNID_ERR_MAX;
603 case CNID_DBD_RES_ERR_DB:
604 case CNID_DBD_RES_ERR_DUPLCNID:
615 /* ---------------------- */
616 cnid_t cnid_dbd_get(struct _cnid_db *cdb, const cnid_t did, char *name, const size_t len)
619 struct cnid_dbd_rqst rqst;
620 struct cnid_dbd_rply rply;
623 if (!cdb || !(db = cdb->_private) || !name) {
624 LOG(log_error, logtype_cnid, "cnid_dbd_get: Parameter error");
625 errno = CNID_ERR_PARAM;
629 if (len > MAXPATHLEN) {
630 LOG(log_error, logtype_cnid, "cnid_dbd_get: Path name is too long");
631 errno = CNID_ERR_PATH;
635 LOG(log_debug, logtype_cnid, "cnid_dbd_get: DID: %u, name: '%s'", ntohl(did), name);
638 rqst.op = CNID_DBD_OP_GET;
644 if (transmit(db, &rqst, &rply) < 0) {
649 switch(rply.result) {
650 case CNID_DBD_RES_OK:
652 LOG(log_debug, logtype_cnid, "cnid_dbd_get: got CNID: %u", ntohl(id));
654 case CNID_DBD_RES_NOTFOUND:
657 case CNID_DBD_RES_ERR_DB:
668 /* ---------------------- */
669 char *cnid_dbd_resolve(struct _cnid_db *cdb, cnid_t *id, void *buffer, size_t len)
672 struct cnid_dbd_rqst rqst;
673 struct cnid_dbd_rply rply;
676 if (!cdb || !(db = cdb->_private) || !id || !(*id)) {
677 LOG(log_error, logtype_cnid, "cnid_resolve: Parameter error");
678 errno = CNID_ERR_PARAM;
682 LOG(log_debug, logtype_cnid, "cnid_dbd_resolve: resolving CNID: %u", ntohl(*id));
684 /* TODO: We should maybe also check len. At the moment we rely on the caller
685 to provide a buffer that is large enough for MAXPATHLEN plus
686 CNID_HEADER_LEN plus 1 byte, which is large enough for the maximum that
687 can come from the database. */
690 rqst.op = CNID_DBD_OP_RESOLVE;
693 /* This mimicks the behaviour of the "regular" cnid_resolve. So far,
694 nobody uses the content of buffer. It only provides space for the
695 name in the caller. */
696 rply.name = (char *)buffer + CNID_HEADER_LEN;
697 rply.namelen = len - CNID_HEADER_LEN;
699 if (transmit(db, &rqst, &rply) < 0) {
705 switch (rply.result) {
706 case CNID_DBD_RES_OK:
709 LOG(log_debug, logtype_cnid, "cnid_dbd_resolve: resolved did: %u, name: '%s'", ntohl(*id), name);
711 case CNID_DBD_RES_NOTFOUND:
715 case CNID_DBD_RES_ERR_DB:
727 /* ---------------------- */
728 int cnid_dbd_getstamp(struct _cnid_db *cdb, void *buffer, const size_t len)
732 if (!cdb || !(db = cdb->_private) || len != ADEDLEN_PRIVSYN) {
733 LOG(log_error, logtype_cnid, "cnid_getstamp: Parameter error");
734 errno = CNID_ERR_PARAM;
737 db->client_stamp = buffer;
738 db->stamp_size = len;
739 memset(buffer,0, len);
743 /* ---------------------- */
744 cnid_t cnid_dbd_lookup(struct _cnid_db *cdb, const struct stat *st, const cnid_t did,
745 char *name, const size_t len)
748 struct cnid_dbd_rqst rqst;
749 struct cnid_dbd_rply rply;
752 if (!cdb || !(db = cdb->_private) || !st || !name) {
753 LOG(log_error, logtype_cnid, "cnid_lookup: Parameter error");
754 errno = CNID_ERR_PARAM;
758 if (len > MAXPATHLEN) {
759 LOG(log_error, logtype_cnid, "cnid_lookup: Path name is too long");
760 errno = CNID_ERR_PATH;
765 rqst.op = CNID_DBD_OP_LOOKUP;
767 if (!(cdb->flags & CNID_FLAG_NODEV)) {
768 rqst.dev = st->st_dev;
771 rqst.ino = st->st_ino;
772 rqst.type = S_ISDIR(st->st_mode)?1:0;
777 LOG(log_debug, logtype_cnid, "cnid_dbd_lookup: CNID: %u, name: '%s', inode: 0x%llx, type: %d (0=file, 1=dir)",
778 ntohl(did), name, (long long)st->st_ino, rqst.type);
781 if (transmit(db, &rqst, &rply) < 0) {
786 switch (rply.result) {
787 case CNID_DBD_RES_OK:
789 LOG(log_debug, logtype_cnid, "cnid_dbd_lookup: got CNID: %u", ntohl(id));
791 case CNID_DBD_RES_NOTFOUND:
794 case CNID_DBD_RES_ERR_DB:
805 /* ---------------------- */
806 int cnid_dbd_update(struct _cnid_db *cdb, const cnid_t id, const struct stat *st,
807 const cnid_t did, char *name, const size_t len)
810 struct cnid_dbd_rqst rqst;
811 struct cnid_dbd_rply rply;
813 if (!cdb || !(db = cdb->_private) || !id || !st || !name) {
814 LOG(log_error, logtype_cnid, "cnid_update: Parameter error");
815 errno = CNID_ERR_PARAM;
819 if (len > MAXPATHLEN) {
820 LOG(log_error, logtype_cnid, "cnid_update: Path name is too long");
821 errno = CNID_ERR_PATH;
826 rqst.op = CNID_DBD_OP_UPDATE;
828 if (!(cdb->flags & CNID_FLAG_NODEV)) {
829 rqst.dev = st->st_dev;
831 rqst.ino = st->st_ino;
832 rqst.type = S_ISDIR(st->st_mode)?1:0;
837 LOG(log_debug, logtype_cnid, "cnid_dbd_update: CNID: %u, name: '%s', inode: 0x%llx, type: %d (0=file, 1=dir)",
838 ntohl(id), name, (long long)st->st_ino, rqst.type);
841 if (transmit(db, &rqst, &rply) < 0) {
846 switch (rply.result) {
847 case CNID_DBD_RES_OK:
848 LOG(log_debug, logtype_cnid, "cnid_dbd_update: updated");
849 case CNID_DBD_RES_NOTFOUND:
851 case CNID_DBD_RES_ERR_DB:
859 /* ---------------------- */
860 cnid_t cnid_dbd_rebuild_add(struct _cnid_db *cdb, const struct stat *st,
861 const cnid_t did, char *name, const size_t len,
865 struct cnid_dbd_rqst rqst;
866 struct cnid_dbd_rply rply;
869 if (!cdb || !(db = cdb->_private) || !st || !name || hint == CNID_INVALID) {
870 LOG(log_error, logtype_cnid, "cnid_rebuild_add: Parameter error");
871 errno = CNID_ERR_PARAM;
875 if (len > MAXPATHLEN) {
876 LOG(log_error, logtype_cnid, "cnid_rebuild_add: Path name is too long");
877 errno = CNID_ERR_PATH;
882 rqst.op = CNID_DBD_OP_REBUILD_ADD;
884 if (!(cdb->flags & CNID_FLAG_NODEV)) {
885 rqst.dev = st->st_dev;
888 rqst.ino = st->st_ino;
889 rqst.type = S_ISDIR(st->st_mode)?1:0;
895 LOG(log_debug, logtype_cnid, "cnid_dbd_rebuild_add: CNID: %u, name: '%s', inode: 0x%llx, type: %d (0=file, 1=dir), hint: %u",
896 ntohl(did), name, (long long)st->st_ino, rqst.type, hint);
898 if (transmit(db, &rqst, &rply) < 0) {
903 switch(rply.result) {
904 case CNID_DBD_RES_OK:
906 LOG(log_debug, logtype_cnid, "cnid_dbd_rebuild_add: got CNID: %u", ntohl(id));
908 case CNID_DBD_RES_ERR_MAX:
909 errno = CNID_ERR_MAX;
912 case CNID_DBD_RES_ERR_DB:
913 case CNID_DBD_RES_ERR_DUPLCNID:
923 /* ---------------------- */
924 int cnid_dbd_delete(struct _cnid_db *cdb, const cnid_t id)
927 struct cnid_dbd_rqst rqst;
928 struct cnid_dbd_rply rply;
930 if (!cdb || !(db = cdb->_private) || !id) {
931 LOG(log_error, logtype_cnid, "cnid_delete: Parameter error");
932 errno = CNID_ERR_PARAM;
936 LOG(log_debug, logtype_cnid, "cnid_dbd_delete: delete CNID: %u", ntohl(id));
939 rqst.op = CNID_DBD_OP_DELETE;
943 if (transmit(db, &rqst, &rply) < 0) {
948 switch (rply.result) {
949 case CNID_DBD_RES_OK:
950 LOG(log_debug, logtype_cnid, "cnid_dbd_delete: deleted CNID: %u", ntohl(id));
951 case CNID_DBD_RES_NOTFOUND:
953 case CNID_DBD_RES_ERR_DB:
962 struct _cnid_module cnid_dbd_module = {
969 #endif /* CNID_DBD */