2 * Copyright (C) Joerg Lenneis 2003
3 * Copyright (C) Frank Lahm 2010
4 * All Rights Reserved. See COPYING.
9 #endif /* HAVE_CONFIG_H */
11 #ifdef CNID_BACKEND_DBD
14 #ifdef HAVE_SYS_STAT_H
16 #endif /* HAVE_SYS_STAT_H */
19 #endif /* HAVE_SYS_UIO_H */
25 #include <sys/socket.h>
26 #include <sys/param.h>
28 #include <netinet/in.h>
30 #include <netinet/tcp.h>
31 #include <netinet/in.h>
32 #include <arpa/inet.h>
37 #include <netatalk/endian.h>
38 #include <atalk/logger.h>
39 #include <atalk/adouble.h>
40 #include <atalk/cnid.h>
41 #include <atalk/cnid_dbd_private.h>
42 #include <atalk/util.h>
47 #define SOL_TCP IPPROTO_TCP
48 #endif /* ! SOL_TCP */
50 /* Wait MAX_DELAY seconds before a request to the CNID server times out */
53 static void RQST_RESET(struct cnid_dbd_rqst *r)
55 memset(r, 0, sizeof(struct cnid_dbd_rqst ));
58 static void delay(int sec)
64 select(0, NULL, NULL, NULL, &tv);
67 static int tsock_getfd(const char *host, const char *port)
72 struct addrinfo hints, *servinfo, *p;
74 socklen_t optlen = sizeof(optval);
76 /* Prepare hint for getaddrinfo */
77 memset(&hints, 0, sizeof hints);
78 hints.ai_family = AF_UNSPEC;
79 hints.ai_socktype = SOCK_STREAM;
80 hints.ai_flags = AI_NUMERICSERV;
82 if ((err = getaddrinfo(host, port, &hints, &servinfo)) != 0) {
83 LOG(log_error, logtype_default, "tsock_getfd: getaddrinfo: CNID server %s:%s : %s\n",
84 host, port, gai_strerror(err));
88 /* loop through all the results and bind to the first we can */
89 for (p = servinfo; p != NULL; p = p->ai_next) {
90 if ((sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1) {
91 LOG(log_info, logtype_default, "tsock_getfd: socket CNID server %s:: %s",
92 host, strerror(errno));
97 if (setsockopt(sock, SOL_TCP, TCP_NODELAY, &attr, sizeof(attr)) == -1) {
98 LOG(log_error, logtype_cnid, "getfd: set TCP_NODELAY CNID server %s: %s",
99 host, strerror(errno));
105 if (setnonblock(sock, 1) != 0) {
106 LOG(log_error, logtype_cnid, "getfd: setnonblock: %s", strerror(err));
112 if (connect(sock, p->ai_addr, p->ai_addrlen) == -1) {
113 if (errno == EINPROGRESS) {
116 tv.tv_sec = 5; /* give it five seconds ... */
121 if ((err = select(sock + 1, NULL, &wfds, NULL, &tv)) == 0) {
123 LOG(log_error, logtype_cnid, "getfd: select timed out for CNID server %s",
131 LOG(log_error, logtype_cnid, "getfd: select failed for CNID server %s",
138 if ( ! FD_ISSET(sock, &wfds)) {
140 LOG(log_error, logtype_cnid, "getfd: socket not ready connecting to %s",
147 if ((err = getsockopt(sock, SOL_SOCKET, SO_ERROR, &optval, &optlen)) != 0 || optval != 0) {
149 /* somethings very wrong */
150 LOG(log_error, logtype_cnid, "getfd: getsockopt error with CNID server %s: %s",
151 host, strerror(errno));
154 LOG(log_error, logtype_cnid, "getfd: getsockopt says: %s",
162 LOG(log_error, logtype_cnid, "getfd: connect CNID server %s: %s",
163 host, strerror(errno));
170 /* We've got a socket */
174 freeaddrinfo(servinfo);
178 LOG(log_error, logtype_cnid, "tsock_getfd: no suitable network config from CNID server (%s:%s): %s",
179 host, port, strerror(errno));
187 * Write "towrite" bytes using writev on non-blocking fd
189 * Every short write is considered an error, transmit can handle that.
191 * @param fd (r) socket fd which must be non-blocking
192 * @param iov (r) iovec for writev
193 * @param towrite (r) number of bytes in all iovec elements
194 * @param vecs (r) number of iovecs in array
196 * @returns "towrite" bytes written or -1 on error
198 static int write_vec(int fd, struct iovec *iov, ssize_t towrite, int vecs)
205 if (((len = writev(fd, iov, vecs)) == -1 && errno == EINTR))
208 if ((! slept) && len == -1 && errno == EAGAIN) {
210 while ((sleepsecs = sleep(sleepsecs)));
215 if (len == towrite) /* wrote everything out */
219 LOG(log_error, logtype_cnid, "write_vec: %s", strerror(errno));
221 LOG(log_error, logtype_cnid, "write_vec: short write: %d", len);
225 LOG(log_maxdebug, logtype_cnid, "write_vec: wrote %d bytes", len);
230 /* --------------------- */
231 static int init_tsock(CNID_private *db)
237 LOG(log_debug, logtype_cnid, "init_tsock: BEGIN. Opening volume '%s', CNID Server: %s/%s",
238 db->db_dir, db->cnidserver, db->cnidport);
240 if ((fd = tsock_getfd(db->cnidserver, db->cnidport)) < 0)
243 len = strlen(db->db_dir);
245 iov[0].iov_base = &len;
246 iov[0].iov_len = sizeof(int);
248 iov[1].iov_base = db->db_dir;
249 iov[1].iov_len = len;
251 if (write_vec(fd, iov, len + sizeof(int), 2) != len + sizeof(int)) {
252 LOG(log_error, logtype_cnid, "init_tsock: Error/short write: %s", strerror(errno));
257 LOG(log_debug, logtype_cnid, "init_tsock: ok");
262 /* --------------------- */
263 static int send_packet(CNID_private *db, struct cnid_dbd_rqst *rqst)
269 iov[0].iov_base = rqst;
270 iov[0].iov_len = sizeof(struct cnid_dbd_rqst);
271 towrite = sizeof(struct cnid_dbd_rqst);
275 iov[1].iov_base = rqst->name;
276 iov[1].iov_len = rqst->namelen;
277 towrite += rqst->namelen;
281 if (write_vec(db->fd, iov, towrite, vecs) != towrite) {
282 LOG(log_warning, logtype_cnid, "send_packet: Error writev rqst (db_dir %s): %s",
283 db->db_dir, strerror(errno));
287 LOG(log_maxdebug, logtype_cnid, "send_packet: {done}");
291 /* ------------------- */
292 static void dbd_initstamp(struct cnid_dbd_rqst *rqst)
295 rqst->op = CNID_DBD_OP_GETSTAMP;
298 /* ------------------- */
299 static int dbd_reply_stamp(struct cnid_dbd_rply *rply)
301 switch (rply->result) {
302 case CNID_DBD_RES_OK:
304 case CNID_DBD_RES_NOTFOUND:
306 case CNID_DBD_RES_ERR_DB:
314 /* ---------------------
315 * send a request and get reply
316 * assume send is non blocking
317 * if no answer after sometime (at least MAX_DELAY secondes) return an error
319 static int dbd_rpc(CNID_private *db, struct cnid_dbd_rqst *rqst, struct cnid_dbd_rply *rply)
325 if (send_packet(db, rqst) < 0) {
329 nametmp = rply->name;
331 ret = readt(db->fd, rply, sizeof(struct cnid_dbd_rply), 0, 2);
333 if (ret != sizeof(struct cnid_dbd_rply)) {
334 LOG(log_error, logtype_cnid, "dbd_rpc: Error reading header from fd (db_dir %s): %s",
335 db->db_dir, ret == -1?strerror(errno):"closed");
336 rply->name = nametmp;
339 rply->name = nametmp;
340 if (rply->namelen && rply->namelen > len) {
341 LOG(log_error, logtype_cnid,
342 "dbd_rpc: Error reading name (db_dir %s): %s name too long: %d. only wanted %d, garbage?",
343 db->db_dir, rply->name, rply->namelen, len);
346 if (rply->namelen && (ret = readt(db->fd, rply->name, rply->namelen, 0, 2)) != (ssize_t)rply->namelen) {
347 LOG(log_error, logtype_cnid, "dbd_rpc: Error reading name from fd (db_dir %s): %s",
348 db->db_dir, ret == -1?strerror(errno):"closed");
352 LOG(log_maxdebug, logtype_cnid, "dbd_rpc: {done}");
357 /* -------------------- */
358 static int transmit(CNID_private *db, struct cnid_dbd_rqst *rqst, struct cnid_dbd_rply *rply)
361 int clean = 1; /* no errors so far - to prevent sleep on first try */
364 /* volume and db don't have the same timestamp
370 struct cnid_dbd_rqst rqst_stamp;
371 struct cnid_dbd_rply rply_stamp;
372 char stamp[ADEDLEN_PRIVSYN];
374 LOG(log_maxdebug, logtype_cnid, "transmit: connecting to cnid_dbd ...");
375 if ((db->fd = init_tsock(db)) < 0) {
378 dbd_initstamp(&rqst_stamp);
379 memset(stamp, 0, ADEDLEN_PRIVSYN);
380 rply_stamp.name = stamp;
381 rply_stamp.namelen = ADEDLEN_PRIVSYN;
383 if (dbd_rpc(db, &rqst_stamp, &rply_stamp) < 0)
385 if (dbd_reply_stamp(&rply_stamp ) < 0)
389 LOG(log_debug7, logtype_cnid, "transmit: reconnected to cnid_dbd, comparing database stamps...");
390 if (memcmp(stamp, db->stamp, ADEDLEN_PRIVSYN)) {
391 LOG(log_error, logtype_cnid, "transmit: ... not the same db!");
395 LOG(log_debug7, logtype_cnid, "transmit: ... OK.");
396 } else { /* db->notfirst == 0 */
398 if (db->client_stamp)
399 memcpy(db->client_stamp, stamp, ADEDLEN_PRIVSYN);
400 memcpy(db->stamp, stamp, ADEDLEN_PRIVSYN);
402 LOG(log_debug, logtype_cnid, "transmit: attached to '%s', stamp: '%08lx'.",
403 db->db_dir, *(uint64_t *)stamp);
405 if (!dbd_rpc(db, rqst, rply)) {
406 LOG(log_maxdebug, logtype_cnid, "transmit: {done}");
412 db->fd = -1; /* FD not valid... will need to reconnect */
415 if (errno == ECONNREFUSED) { /* errno carefully injected in tsock_getfd */
417 LOG(log_error, logtype_cnid, "transmit: connection refused (db_dir %s)", db->db_dir);
421 if (!clean) { /* don't sleep if just got disconnected by cnid server */
423 if (t - orig > MAX_DELAY) {
424 LOG(log_error, logtype_cnid, "transmit: Request to dbd daemon (db_dir %s) timed out.", db->db_dir);
427 /* sleep a little before retry */
430 clean = 0; /* false... next time sleep */
437 /* ---------------------- */
438 static struct _cnid_db *cnid_dbd_new(const char *volpath)
440 struct _cnid_db *cdb;
442 if ((cdb = (struct _cnid_db *)calloc(1, sizeof(struct _cnid_db))) == NULL)
445 if ((cdb->volpath = strdup(volpath)) == NULL) {
450 cdb->flags = CNID_FLAG_PERSISTENT | CNID_FLAG_LAZY_INIT;
452 cdb->cnid_add = cnid_dbd_add;
453 cdb->cnid_delete = cnid_dbd_delete;
454 cdb->cnid_get = cnid_dbd_get;
455 cdb->cnid_lookup = cnid_dbd_lookup;
456 cdb->cnid_nextid = NULL;
457 cdb->cnid_resolve = cnid_dbd_resolve;
458 cdb->cnid_getstamp = cnid_dbd_getstamp;
459 cdb->cnid_update = cnid_dbd_update;
460 cdb->cnid_rebuild_add = cnid_dbd_rebuild_add;
461 cdb->cnid_close = cnid_dbd_close;
466 /* ---------------------- */
467 struct _cnid_db *cnid_dbd_open(struct cnid_open_args *args)
469 CNID_private *db = NULL;
470 struct _cnid_db *cdb = NULL;
476 if ((cdb = cnid_dbd_new(args->dir)) == NULL) {
477 LOG(log_error, logtype_cnid, "cnid_open: Unable to allocate memory for database");
481 if ((db = (CNID_private *)calloc(1, sizeof(CNID_private))) == NULL) {
482 LOG(log_error, logtype_cnid, "cnid_open: Unable to allocate memory for database");
483 goto cnid_dbd_open_fail;
488 /* We keep a copy of the directory in the db structure so that we can
489 transparently reconnect later. */
490 strcpy(db->db_dir, args->dir);
491 db->magic = CNID_DB_MAGIC;
493 db->cnidserver = strdup(args->cnidserver);
494 db->cnidport = strdup(args->cnidport);
496 LOG(log_debug, logtype_cnid, "cnid_dbd_open: Finished initializing cnid dbd module for volume '%s'", db->db_dir);
502 if (cdb->volpath != NULL) {
513 /* ---------------------- */
514 void cnid_dbd_close(struct _cnid_db *cdb)
519 LOG(log_error, logtype_cnid, "cnid_close called with NULL argument !");
523 if ((db = cdb->_private) != NULL) {
524 LOG(log_debug, logtype_cnid, "closing database connection for volume '%s'", db->db_dir);
537 /* ---------------------- */
538 cnid_t cnid_dbd_add(struct _cnid_db *cdb, const struct stat *st,
539 const cnid_t did, char *name, const size_t len,
543 struct cnid_dbd_rqst rqst;
544 struct cnid_dbd_rply rply;
547 if (!cdb || !(db = cdb->_private) || !st || !name) {
548 LOG(log_error, logtype_cnid, "cnid_add: Parameter error");
549 errno = CNID_ERR_PARAM;
553 if (len > MAXPATHLEN) {
554 LOG(log_error, logtype_cnid, "cnid_add: Path name is too long");
555 errno = CNID_ERR_PATH;
560 rqst.op = CNID_DBD_OP_ADD;
562 if (!(cdb->flags & CNID_FLAG_NODEV)) {
563 rqst.dev = st->st_dev;
566 rqst.ino = st->st_ino;
567 rqst.type = S_ISDIR(st->st_mode)?1:0;
573 LOG(log_debug, logtype_cnid, "cnid_dbd_add: CNID: %u, name: '%s', inode: 0x%llx, type: %d (0=file, 1=dir)",
574 ntohl(did), name, (long long)st->st_ino, rqst.type);
577 if (transmit(db, &rqst, &rply) < 0) {
582 switch(rply.result) {
583 case CNID_DBD_RES_OK:
585 LOG(log_debug, logtype_cnid, "cnid_dbd_add: got CNID: %u", ntohl(id));
587 case CNID_DBD_RES_ERR_MAX:
588 errno = CNID_ERR_MAX;
591 case CNID_DBD_RES_ERR_DB:
592 case CNID_DBD_RES_ERR_DUPLCNID:
603 /* ---------------------- */
604 cnid_t cnid_dbd_get(struct _cnid_db *cdb, const cnid_t did, char *name, const size_t len)
607 struct cnid_dbd_rqst rqst;
608 struct cnid_dbd_rply rply;
611 if (!cdb || !(db = cdb->_private) || !name) {
612 LOG(log_error, logtype_cnid, "cnid_dbd_get: Parameter error");
613 errno = CNID_ERR_PARAM;
617 if (len > MAXPATHLEN) {
618 LOG(log_error, logtype_cnid, "cnid_dbd_get: Path name is too long");
619 errno = CNID_ERR_PATH;
623 LOG(log_debug, logtype_cnid, "cnid_dbd_get: DID: %u, name: '%s'", ntohl(did), name);
626 rqst.op = CNID_DBD_OP_GET;
632 if (transmit(db, &rqst, &rply) < 0) {
637 switch(rply.result) {
638 case CNID_DBD_RES_OK:
640 LOG(log_debug, logtype_cnid, "cnid_dbd_get: got CNID: %u", ntohl(id));
642 case CNID_DBD_RES_NOTFOUND:
645 case CNID_DBD_RES_ERR_DB:
656 /* ---------------------- */
657 char *cnid_dbd_resolve(struct _cnid_db *cdb, cnid_t *id, void *buffer, size_t len)
660 struct cnid_dbd_rqst rqst;
661 struct cnid_dbd_rply rply;
664 if (!cdb || !(db = cdb->_private) || !id || !(*id)) {
665 LOG(log_error, logtype_cnid, "cnid_resolve: Parameter error");
666 errno = CNID_ERR_PARAM;
670 LOG(log_debug, logtype_cnid, "cnid_dbd_resolve: resolving CNID: %u", ntohl(*id));
672 /* TODO: We should maybe also check len. At the moment we rely on the caller
673 to provide a buffer that is large enough for MAXPATHLEN plus
674 CNID_HEADER_LEN plus 1 byte, which is large enough for the maximum that
675 can come from the database. */
678 rqst.op = CNID_DBD_OP_RESOLVE;
681 /* This mimicks the behaviour of the "regular" cnid_resolve. So far,
682 nobody uses the content of buffer. It only provides space for the
683 name in the caller. */
684 rply.name = (char *)buffer + CNID_HEADER_LEN;
685 rply.namelen = len - CNID_HEADER_LEN;
687 if (transmit(db, &rqst, &rply) < 0) {
693 switch (rply.result) {
694 case CNID_DBD_RES_OK:
697 LOG(log_debug, logtype_cnid, "cnid_dbd_resolve: resolved did: %u, name: '%s'", ntohl(*id), name);
699 case CNID_DBD_RES_NOTFOUND:
703 case CNID_DBD_RES_ERR_DB:
715 /* ---------------------- */
716 int cnid_dbd_getstamp(struct _cnid_db *cdb, void *buffer, const size_t len)
720 if (!cdb || !(db = cdb->_private) || len != ADEDLEN_PRIVSYN) {
721 LOG(log_error, logtype_cnid, "cnid_getstamp: Parameter error");
722 errno = CNID_ERR_PARAM;
725 db->client_stamp = buffer;
726 db->stamp_size = len;
727 memset(buffer,0, len);
731 /* ---------------------- */
732 cnid_t cnid_dbd_lookup(struct _cnid_db *cdb, const struct stat *st, const cnid_t did,
733 char *name, const size_t len)
736 struct cnid_dbd_rqst rqst;
737 struct cnid_dbd_rply rply;
740 if (!cdb || !(db = cdb->_private) || !st || !name) {
741 LOG(log_error, logtype_cnid, "cnid_lookup: Parameter error");
742 errno = CNID_ERR_PARAM;
746 if (len > MAXPATHLEN) {
747 LOG(log_error, logtype_cnid, "cnid_lookup: Path name is too long");
748 errno = CNID_ERR_PATH;
753 rqst.op = CNID_DBD_OP_LOOKUP;
755 if (!(cdb->flags & CNID_FLAG_NODEV)) {
756 rqst.dev = st->st_dev;
759 rqst.ino = st->st_ino;
760 rqst.type = S_ISDIR(st->st_mode)?1:0;
765 LOG(log_debug, logtype_cnid, "cnid_dbd_lookup: CNID: %u, name: '%s', inode: 0x%llx, type: %d (0=file, 1=dir)",
766 ntohl(did), name, (long long)st->st_ino, rqst.type);
769 if (transmit(db, &rqst, &rply) < 0) {
774 switch (rply.result) {
775 case CNID_DBD_RES_OK:
777 LOG(log_debug, logtype_cnid, "cnid_dbd_lookup: got CNID: %u", ntohl(id));
779 case CNID_DBD_RES_NOTFOUND:
782 case CNID_DBD_RES_ERR_DB:
793 /* ---------------------- */
794 int cnid_dbd_update(struct _cnid_db *cdb, const cnid_t id, const struct stat *st,
795 const cnid_t did, char *name, const size_t len)
798 struct cnid_dbd_rqst rqst;
799 struct cnid_dbd_rply rply;
801 if (!cdb || !(db = cdb->_private) || !id || !st || !name) {
802 LOG(log_error, logtype_cnid, "cnid_update: Parameter error");
803 errno = CNID_ERR_PARAM;
807 if (len > MAXPATHLEN) {
808 LOG(log_error, logtype_cnid, "cnid_update: Path name is too long");
809 errno = CNID_ERR_PATH;
814 rqst.op = CNID_DBD_OP_UPDATE;
816 if (!(cdb->flags & CNID_FLAG_NODEV)) {
817 rqst.dev = st->st_dev;
819 rqst.ino = st->st_ino;
820 rqst.type = S_ISDIR(st->st_mode)?1:0;
825 LOG(log_debug, logtype_cnid, "cnid_dbd_update: CNID: %u, name: '%s', inode: 0x%llx, type: %d (0=file, 1=dir)",
826 ntohl(id), name, (long long)st->st_ino, rqst.type);
829 if (transmit(db, &rqst, &rply) < 0) {
834 switch (rply.result) {
835 case CNID_DBD_RES_OK:
836 LOG(log_debug, logtype_cnid, "cnid_dbd_update: updated");
837 case CNID_DBD_RES_NOTFOUND:
839 case CNID_DBD_RES_ERR_DB:
847 /* ---------------------- */
848 cnid_t cnid_dbd_rebuild_add(struct _cnid_db *cdb, const struct stat *st,
849 const cnid_t did, char *name, const size_t len,
853 struct cnid_dbd_rqst rqst;
854 struct cnid_dbd_rply rply;
857 if (!cdb || !(db = cdb->_private) || !st || !name || hint == CNID_INVALID) {
858 LOG(log_error, logtype_cnid, "cnid_rebuild_add: Parameter error");
859 errno = CNID_ERR_PARAM;
863 if (len > MAXPATHLEN) {
864 LOG(log_error, logtype_cnid, "cnid_rebuild_add: Path name is too long");
865 errno = CNID_ERR_PATH;
870 rqst.op = CNID_DBD_OP_REBUILD_ADD;
872 if (!(cdb->flags & CNID_FLAG_NODEV)) {
873 rqst.dev = st->st_dev;
876 rqst.ino = st->st_ino;
877 rqst.type = S_ISDIR(st->st_mode)?1:0;
883 LOG(log_debug, logtype_cnid, "cnid_dbd_rebuild_add: CNID: %u, name: '%s', inode: 0x%llx, type: %d (0=file, 1=dir), hint: %u",
884 ntohl(did), name, (long long)st->st_ino, rqst.type, hint);
886 if (transmit(db, &rqst, &rply) < 0) {
891 switch(rply.result) {
892 case CNID_DBD_RES_OK:
894 LOG(log_debug, logtype_cnid, "cnid_dbd_rebuild_add: got CNID: %u", ntohl(id));
896 case CNID_DBD_RES_ERR_MAX:
897 errno = CNID_ERR_MAX;
900 case CNID_DBD_RES_ERR_DB:
901 case CNID_DBD_RES_ERR_DUPLCNID:
911 /* ---------------------- */
912 int cnid_dbd_delete(struct _cnid_db *cdb, const cnid_t id)
915 struct cnid_dbd_rqst rqst;
916 struct cnid_dbd_rply rply;
918 if (!cdb || !(db = cdb->_private) || !id) {
919 LOG(log_error, logtype_cnid, "cnid_delete: Parameter error");
920 errno = CNID_ERR_PARAM;
924 LOG(log_debug, logtype_cnid, "cnid_dbd_delete: delete CNID: %u", ntohl(id));
927 rqst.op = CNID_DBD_OP_DELETE;
931 if (transmit(db, &rqst, &rply) < 0) {
936 switch (rply.result) {
937 case CNID_DBD_RES_OK:
938 LOG(log_debug, logtype_cnid, "cnid_dbd_delete: deleted CNID: %u", ntohl(id));
939 case CNID_DBD_RES_NOTFOUND:
941 case CNID_DBD_RES_ERR_DB:
950 struct _cnid_module cnid_dbd_module = {
957 #endif /* CNID_DBD */