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 socklen_t optlen = sizeof(optval);
75 /* Prepare hint for getaddrinfo */
76 memset(&hints, 0, sizeof hints);
77 hints.ai_family = AF_UNSPEC;
78 hints.ai_socktype = SOCK_STREAM;
79 hints.ai_flags = AI_NUMERICSERV;
81 if ((err = getaddrinfo(host, port, &hints, &servinfo)) != 0) {
82 LOG(log_error, logtype_default, "tsock_getfd: getaddrinfo: CNID server %s:%s : %s\n",
83 host, port, gai_strerror(err));
87 /* loop through all the results and bind to the first we can */
88 for (p = servinfo; p != NULL; p = p->ai_next) {
89 if ((sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1) {
90 LOG(log_info, logtype_default, "tsock_getfd: socket CNID server %s:: %s",
91 host, strerror(errno));
96 if (setsockopt(sock, SOL_TCP, TCP_NODELAY, &attr, sizeof(attr)) == -1) {
97 LOG(log_error, logtype_cnid, "getfd: set TCP_NODELAY CNID server %s: %s",
98 host, strerror(errno));
104 if (setnonblock(sock, 1) != 0) {
105 LOG(log_error, logtype_cnid, "getfd: setnonblock: %s", strerror(err));
111 if (connect(sock, p->ai_addr, p->ai_addrlen) == -1) {
112 if (errno == EINPROGRESS) {
115 tv.tv_sec = 5; /* give it five seconds ... */
120 if ((err = select(sock + 1, NULL, &wfds, NULL, &tv)) == 0) {
122 LOG(log_error, logtype_cnid, "getfd: select timed out for CNID server %s",
130 LOG(log_error, logtype_cnid, "getfd: select failed for CNID server %s",
137 if ( ! FD_ISSET(sock, &wfds)) {
139 LOG(log_error, logtype_cnid, "getfd: socket not ready connecting to %s",
146 if ((err = getsockopt(sock, SOL_SOCKET, SO_ERROR, &optval, &optlen)) != 0 || optval != 0) {
148 /* somethings very wrong */
149 LOG(log_error, logtype_cnid, "getfd: getsockopt error with CNID server %s: %s",
150 host, strerror(errno));
153 LOG(log_error, logtype_cnid, "getfd: getsockopt says: %s",
161 LOG(log_error, logtype_cnid, "getfd: connect CNID server %s: %s",
162 host, strerror(errno));
169 /* We've got a socket */
173 freeaddrinfo(servinfo);
177 LOG(log_error, logtype_cnid, "tsock_getfd: no suitable network config from CNID server (%s:%s): %s",
178 host, port, strerror(errno));
186 * Write "towrite" bytes using writev on non-blocking fd
188 * Every short write is considered an error, transmit can handle that.
190 * @param fd (r) socket fd which must be non-blocking
191 * @param iov (r) iovec for writev
192 * @param towrite (r) number of bytes in all iovec elements
193 * @param vecs (r) number of iovecs in array
195 * @returns "towrite" bytes written or -1 on error
197 static int write_vec(int fd, struct iovec *iov, ssize_t towrite, int vecs)
202 if (((len = writev(fd, iov, vecs)) == -1 && errno == EINTR))
205 if (len == towrite) /* wrote everything out */
209 LOG(log_error, logtype_cnid, "write_vec: short write: %s", strerror(errno));
211 LOG(log_error, logtype_cnid, "write_vec: short write: %d", len);
215 LOG(log_maxdebug, logtype_cnid, "write_vec: wrote %d bytes", len);
220 /* --------------------- */
221 static int init_tsock(CNID_private *db)
227 LOG(log_debug, logtype_cnid, "init_tsock: BEGIN. Opening volume '%s', CNID Server: %s/%s",
228 db->db_dir, db->cnidserver, db->cnidport);
230 if ((fd = tsock_getfd(db->cnidserver, db->cnidport)) < 0)
233 len = strlen(db->db_dir);
235 iov[0].iov_base = &len;
236 iov[0].iov_len = sizeof(int);
238 iov[1].iov_base = db->db_dir;
239 iov[1].iov_len = len;
241 if (write_vec(fd, iov, len + sizeof(int), 2) != len + sizeof(int)) {
242 LOG(log_error, logtype_cnid, "init_tsock: Error/short write: %s", strerror(errno));
247 LOG(log_debug, logtype_cnid, "init_tsock: ok");
252 /* --------------------- */
253 static int send_packet(CNID_private *db, struct cnid_dbd_rqst *rqst)
259 iov[0].iov_base = rqst;
260 iov[0].iov_len = sizeof(struct cnid_dbd_rqst);
261 towrite = sizeof(struct cnid_dbd_rqst);
265 iov[1].iov_base = rqst->name;
266 iov[1].iov_len = rqst->namelen;
267 towrite += rqst->namelen;
271 if (write_vec(db->fd, iov, towrite, vecs) != towrite) {
272 LOG(log_warning, logtype_cnid, "send_packet: Error writev rqst (db_dir %s): %s",
273 db->db_dir, strerror(errno));
277 LOG(log_maxdebug, logtype_cnid, "send_packet: {done}");
281 /* ------------------- */
282 static void dbd_initstamp(struct cnid_dbd_rqst *rqst)
285 rqst->op = CNID_DBD_OP_GETSTAMP;
288 /* ------------------- */
289 static int dbd_reply_stamp(struct cnid_dbd_rply *rply)
291 switch (rply->result) {
292 case CNID_DBD_RES_OK:
294 case CNID_DBD_RES_NOTFOUND:
296 case CNID_DBD_RES_ERR_DB:
305 * Non-blocking read "length" bytes within 1 second using select
307 * @param socket (r) must be nonblocking !
308 * @param data (rw) buffer for the read data
309 * @param lenght (r) how many bytes to read
311 * @returns number of bytes actually read or -1 on fatal error
313 static ssize_t read_packet(int socket, void *data, const size_t length)
323 while (stored < length) {
324 len = read(socket, (u_int8_t *) data + stored, length - stored);
334 FD_SET(socket, &rfds);
335 while ((ret = select(socket + 1, &rfds, NULL, NULL, &tv)) < 1) {
338 LOG(log_warning, logtype_cnid, "select timeout 1s");
341 LOG(log_error, logtype_cnid, "select: %s", strerror(errno));
347 LOG(log_error, logtype_cnid, "read: %s", strerror(errno));
358 /* ---------------------
359 * send a request and get reply
360 * assume send is non blocking
361 * if no answer after sometime (at least MAX_DELAY secondes) return an error
363 static int dbd_rpc(CNID_private *db, struct cnid_dbd_rqst *rqst, struct cnid_dbd_rply *rply)
369 if (send_packet(db, rqst) < 0) {
373 nametmp = rply->name;
375 ret = read_packet(db->fd, rply, sizeof(struct cnid_dbd_rply));
377 if (ret != sizeof(struct cnid_dbd_rply)) {
378 LOG(log_error, logtype_cnid, "dbd_rpc: Error reading header from fd (db_dir %s): %s",
379 db->db_dir, ret == -1?strerror(errno):"closed");
380 rply->name = nametmp;
383 rply->name = nametmp;
384 if (rply->namelen && rply->namelen > len) {
385 LOG(log_error, logtype_cnid,
386 "dbd_rpc: Error reading name (db_dir %s): %s name too long: %d. only wanted %d, garbage?",
387 db->db_dir, rply->name, rply->namelen, len);
390 if (rply->namelen && (ret = read_packet(db->fd, rply->name, rply->namelen)) != (ssize_t)rply->namelen) {
391 LOG(log_error, logtype_cnid, "dbd_rpc: Error reading name from fd (db_dir %s): %s",
392 db->db_dir, ret == -1?strerror(errno):"closed");
396 LOG(log_maxdebug, logtype_cnid, "dbd_rpc: {done}");
401 /* -------------------- */
402 static int transmit(CNID_private *db, struct cnid_dbd_rqst *rqst, struct cnid_dbd_rply *rply)
405 int clean = 1; /* no errors so far - to prevent sleep on first try */
408 /* volume and db don't have the same timestamp
414 struct cnid_dbd_rqst rqst_stamp;
415 struct cnid_dbd_rply rply_stamp;
416 char stamp[ADEDLEN_PRIVSYN];
418 LOG(log_maxdebug, logtype_cnid, "transmit: connecting to cnid_dbd ...");
419 if ((db->fd = init_tsock(db)) < 0) {
422 dbd_initstamp(&rqst_stamp);
423 memset(stamp, 0, ADEDLEN_PRIVSYN);
424 rply_stamp.name = stamp;
425 rply_stamp.namelen = ADEDLEN_PRIVSYN;
427 if (dbd_rpc(db, &rqst_stamp, &rply_stamp) < 0)
429 if (dbd_reply_stamp(&rply_stamp ) < 0)
433 LOG(log_debug7, logtype_cnid, "transmit: reconnected to cnid_dbd, comparing database stamps...");
434 if (memcmp(stamp, db->stamp, ADEDLEN_PRIVSYN)) {
435 LOG(log_error, logtype_cnid, "transmit: ... not the same db!");
439 LOG(log_debug7, logtype_cnid, "transmit: ... OK.");
440 } else { /* db->notfirst == 0 */
442 if (db->client_stamp)
443 memcpy(db->client_stamp, stamp, ADEDLEN_PRIVSYN);
444 memcpy(db->stamp, stamp, ADEDLEN_PRIVSYN);
446 LOG(log_debug, logtype_cnid, "transmit: attached to '%s', stamp: '%08lx'.",
447 db->db_dir, *(uint64_t *)stamp);
449 if (!dbd_rpc(db, rqst, rply)) {
450 LOG(log_maxdebug, logtype_cnid, "transmit: {done}");
456 db->fd = -1; /* FD not valid... will need to reconnect */
459 if (errno == ECONNREFUSED) { /* errno carefully injected in tsock_getfd */
461 LOG(log_error, logtype_cnid, "transmit: connection refused (db_dir %s)", db->db_dir);
465 if (!clean) { /* don't sleep if just got disconnected by cnid server */
467 if (t - orig > MAX_DELAY) {
468 LOG(log_error, logtype_cnid, "transmit: Request to dbd daemon (db_dir %s) timed out.", db->db_dir);
471 /* sleep a little before retry */
474 clean = 0; /* false... next time sleep */
481 /* ---------------------- */
482 static struct _cnid_db *cnid_dbd_new(const char *volpath)
484 struct _cnid_db *cdb;
486 if ((cdb = (struct _cnid_db *)calloc(1, sizeof(struct _cnid_db))) == NULL)
489 if ((cdb->volpath = strdup(volpath)) == NULL) {
494 cdb->flags = CNID_FLAG_PERSISTENT | CNID_FLAG_LAZY_INIT;
496 cdb->cnid_add = cnid_dbd_add;
497 cdb->cnid_delete = cnid_dbd_delete;
498 cdb->cnid_get = cnid_dbd_get;
499 cdb->cnid_lookup = cnid_dbd_lookup;
500 cdb->cnid_nextid = NULL;
501 cdb->cnid_resolve = cnid_dbd_resolve;
502 cdb->cnid_getstamp = cnid_dbd_getstamp;
503 cdb->cnid_update = cnid_dbd_update;
504 cdb->cnid_rebuild_add = cnid_dbd_rebuild_add;
505 cdb->cnid_close = cnid_dbd_close;
510 /* ---------------------- */
511 struct _cnid_db *cnid_dbd_open(struct cnid_open_args *args)
513 CNID_private *db = NULL;
514 struct _cnid_db *cdb = NULL;
520 if ((cdb = cnid_dbd_new(args->dir)) == NULL) {
521 LOG(log_error, logtype_cnid, "cnid_open: Unable to allocate memory for database");
525 if ((db = (CNID_private *)calloc(1, sizeof(CNID_private))) == NULL) {
526 LOG(log_error, logtype_cnid, "cnid_open: Unable to allocate memory for database");
527 goto cnid_dbd_open_fail;
532 /* We keep a copy of the directory in the db structure so that we can
533 transparently reconnect later. */
534 strcpy(db->db_dir, args->dir);
535 db->magic = CNID_DB_MAGIC;
537 db->cnidserver = strdup(args->cnidserver);
538 db->cnidport = strdup(args->cnidport);
540 LOG(log_debug, logtype_cnid, "cnid_dbd_open: Finished initializing cnid dbd module for volume '%s'", db->db_dir);
546 if (cdb->volpath != NULL) {
557 /* ---------------------- */
558 void cnid_dbd_close(struct _cnid_db *cdb)
563 LOG(log_error, logtype_cnid, "cnid_close called with NULL argument !");
567 if ((db = cdb->_private) != NULL) {
568 LOG(log_debug, logtype_cnid, "closing database connection for volume '%s'", db->db_dir);
581 /* ---------------------- */
582 cnid_t cnid_dbd_add(struct _cnid_db *cdb, const struct stat *st,
583 const cnid_t did, char *name, const size_t len,
587 struct cnid_dbd_rqst rqst;
588 struct cnid_dbd_rply rply;
591 if (!cdb || !(db = cdb->_private) || !st || !name) {
592 LOG(log_error, logtype_cnid, "cnid_add: Parameter error");
593 errno = CNID_ERR_PARAM;
597 if (len > MAXPATHLEN) {
598 LOG(log_error, logtype_cnid, "cnid_add: Path name is too long");
599 errno = CNID_ERR_PATH;
604 rqst.op = CNID_DBD_OP_ADD;
606 if (!(cdb->flags & CNID_FLAG_NODEV)) {
607 rqst.dev = st->st_dev;
610 rqst.ino = st->st_ino;
611 rqst.type = S_ISDIR(st->st_mode)?1:0;
617 LOG(log_debug, logtype_cnid, "cnid_dbd_add: CNID: %u, name: '%s', inode: 0x%llx, type: %d (0=file, 1=dir)",
618 ntohl(did), name, (long long)st->st_ino, rqst.type);
621 if (transmit(db, &rqst, &rply) < 0) {
626 switch(rply.result) {
627 case CNID_DBD_RES_OK:
629 LOG(log_debug, logtype_cnid, "cnid_dbd_add: got CNID: %u", ntohl(id));
631 case CNID_DBD_RES_ERR_MAX:
632 errno = CNID_ERR_MAX;
635 case CNID_DBD_RES_ERR_DB:
636 case CNID_DBD_RES_ERR_DUPLCNID:
647 /* ---------------------- */
648 cnid_t cnid_dbd_get(struct _cnid_db *cdb, const cnid_t did, char *name, const size_t len)
651 struct cnid_dbd_rqst rqst;
652 struct cnid_dbd_rply rply;
655 if (!cdb || !(db = cdb->_private) || !name) {
656 LOG(log_error, logtype_cnid, "cnid_dbd_get: Parameter error");
657 errno = CNID_ERR_PARAM;
661 if (len > MAXPATHLEN) {
662 LOG(log_error, logtype_cnid, "cnid_dbd_get: Path name is too long");
663 errno = CNID_ERR_PATH;
667 LOG(log_debug, logtype_cnid, "cnid_dbd_get: DID: %u, name: '%s'", ntohl(did), name);
670 rqst.op = CNID_DBD_OP_GET;
676 if (transmit(db, &rqst, &rply) < 0) {
681 switch(rply.result) {
682 case CNID_DBD_RES_OK:
684 LOG(log_debug, logtype_cnid, "cnid_dbd_get: got CNID: %u", ntohl(id));
686 case CNID_DBD_RES_NOTFOUND:
689 case CNID_DBD_RES_ERR_DB:
700 /* ---------------------- */
701 char *cnid_dbd_resolve(struct _cnid_db *cdb, cnid_t *id, void *buffer, size_t len)
704 struct cnid_dbd_rqst rqst;
705 struct cnid_dbd_rply rply;
708 if (!cdb || !(db = cdb->_private) || !id || !(*id)) {
709 LOG(log_error, logtype_cnid, "cnid_resolve: Parameter error");
710 errno = CNID_ERR_PARAM;
714 LOG(log_debug, logtype_cnid, "cnid_dbd_resolve: resolving CNID: %u", ntohl(*id));
716 /* TODO: We should maybe also check len. At the moment we rely on the caller
717 to provide a buffer that is large enough for MAXPATHLEN plus
718 CNID_HEADER_LEN plus 1 byte, which is large enough for the maximum that
719 can come from the database. */
722 rqst.op = CNID_DBD_OP_RESOLVE;
725 /* This mimicks the behaviour of the "regular" cnid_resolve. So far,
726 nobody uses the content of buffer. It only provides space for the
727 name in the caller. */
728 rply.name = (char *)buffer + CNID_HEADER_LEN;
729 rply.namelen = len - CNID_HEADER_LEN;
731 if (transmit(db, &rqst, &rply) < 0) {
737 switch (rply.result) {
738 case CNID_DBD_RES_OK:
741 LOG(log_debug, logtype_cnid, "cnid_dbd_resolve: resolved did: %u, name: '%s'", ntohl(*id), name);
743 case CNID_DBD_RES_NOTFOUND:
747 case CNID_DBD_RES_ERR_DB:
759 /* ---------------------- */
760 int cnid_dbd_getstamp(struct _cnid_db *cdb, void *buffer, const size_t len)
764 if (!cdb || !(db = cdb->_private) || len != ADEDLEN_PRIVSYN) {
765 LOG(log_error, logtype_cnid, "cnid_getstamp: Parameter error");
766 errno = CNID_ERR_PARAM;
769 db->client_stamp = buffer;
770 db->stamp_size = len;
771 memset(buffer,0, len);
775 /* ---------------------- */
776 cnid_t cnid_dbd_lookup(struct _cnid_db *cdb, const struct stat *st, const cnid_t did,
777 char *name, const size_t len)
780 struct cnid_dbd_rqst rqst;
781 struct cnid_dbd_rply rply;
784 if (!cdb || !(db = cdb->_private) || !st || !name) {
785 LOG(log_error, logtype_cnid, "cnid_lookup: Parameter error");
786 errno = CNID_ERR_PARAM;
790 if (len > MAXPATHLEN) {
791 LOG(log_error, logtype_cnid, "cnid_lookup: Path name is too long");
792 errno = CNID_ERR_PATH;
797 rqst.op = CNID_DBD_OP_LOOKUP;
799 if (!(cdb->flags & CNID_FLAG_NODEV)) {
800 rqst.dev = st->st_dev;
803 rqst.ino = st->st_ino;
804 rqst.type = S_ISDIR(st->st_mode)?1:0;
809 LOG(log_debug, logtype_cnid, "cnid_dbd_lookup: CNID: %u, name: '%s', inode: 0x%llx, type: %d (0=file, 1=dir)",
810 ntohl(did), name, (long long)st->st_ino, rqst.type);
813 if (transmit(db, &rqst, &rply) < 0) {
818 switch (rply.result) {
819 case CNID_DBD_RES_OK:
821 LOG(log_debug, logtype_cnid, "cnid_dbd_lookup: got CNID: %u", ntohl(id));
823 case CNID_DBD_RES_NOTFOUND:
826 case CNID_DBD_RES_ERR_DB:
837 /* ---------------------- */
838 int cnid_dbd_update(struct _cnid_db *cdb, const cnid_t id, const struct stat *st,
839 const cnid_t did, char *name, const size_t len)
842 struct cnid_dbd_rqst rqst;
843 struct cnid_dbd_rply rply;
845 if (!cdb || !(db = cdb->_private) || !id || !st || !name) {
846 LOG(log_error, logtype_cnid, "cnid_update: Parameter error");
847 errno = CNID_ERR_PARAM;
851 if (len > MAXPATHLEN) {
852 LOG(log_error, logtype_cnid, "cnid_update: Path name is too long");
853 errno = CNID_ERR_PATH;
858 rqst.op = CNID_DBD_OP_UPDATE;
860 if (!(cdb->flags & CNID_FLAG_NODEV)) {
861 rqst.dev = st->st_dev;
863 rqst.ino = st->st_ino;
864 rqst.type = S_ISDIR(st->st_mode)?1:0;
869 LOG(log_debug, logtype_cnid, "cnid_dbd_update: CNID: %u, name: '%s', inode: 0x%llx, type: %d (0=file, 1=dir)",
870 ntohl(id), name, (long long)st->st_ino, rqst.type);
873 if (transmit(db, &rqst, &rply) < 0) {
878 switch (rply.result) {
879 case CNID_DBD_RES_OK:
880 LOG(log_debug, logtype_cnid, "cnid_dbd_update: updated");
881 case CNID_DBD_RES_NOTFOUND:
883 case CNID_DBD_RES_ERR_DB:
891 /* ---------------------- */
892 cnid_t cnid_dbd_rebuild_add(struct _cnid_db *cdb, const struct stat *st,
893 const cnid_t did, char *name, const size_t len,
897 struct cnid_dbd_rqst rqst;
898 struct cnid_dbd_rply rply;
901 if (!cdb || !(db = cdb->_private) || !st || !name || hint == CNID_INVALID) {
902 LOG(log_error, logtype_cnid, "cnid_rebuild_add: Parameter error");
903 errno = CNID_ERR_PARAM;
907 if (len > MAXPATHLEN) {
908 LOG(log_error, logtype_cnid, "cnid_rebuild_add: Path name is too long");
909 errno = CNID_ERR_PATH;
914 rqst.op = CNID_DBD_OP_REBUILD_ADD;
916 if (!(cdb->flags & CNID_FLAG_NODEV)) {
917 rqst.dev = st->st_dev;
920 rqst.ino = st->st_ino;
921 rqst.type = S_ISDIR(st->st_mode)?1:0;
927 LOG(log_debug, logtype_cnid, "cnid_dbd_rebuild_add: CNID: %u, name: '%s', inode: 0x%llx, type: %d (0=file, 1=dir), hint: %u",
928 ntohl(did), name, (long long)st->st_ino, rqst.type, hint);
930 if (transmit(db, &rqst, &rply) < 0) {
935 switch(rply.result) {
936 case CNID_DBD_RES_OK:
938 LOG(log_debug, logtype_cnid, "cnid_dbd_rebuild_add: got CNID: %u", ntohl(id));
940 case CNID_DBD_RES_ERR_MAX:
941 errno = CNID_ERR_MAX;
944 case CNID_DBD_RES_ERR_DB:
945 case CNID_DBD_RES_ERR_DUPLCNID:
955 /* ---------------------- */
956 int cnid_dbd_delete(struct _cnid_db *cdb, const cnid_t id)
959 struct cnid_dbd_rqst rqst;
960 struct cnid_dbd_rply rply;
962 if (!cdb || !(db = cdb->_private) || !id) {
963 LOG(log_error, logtype_cnid, "cnid_delete: Parameter error");
964 errno = CNID_ERR_PARAM;
968 LOG(log_debug, logtype_cnid, "cnid_dbd_delete: delete CNID: %u", ntohl(id));
971 rqst.op = CNID_DBD_OP_DELETE;
975 if (transmit(db, &rqst, &rply) < 0) {
980 switch (rply.result) {
981 case CNID_DBD_RES_OK:
982 LOG(log_debug, logtype_cnid, "cnid_dbd_delete: deleted CNID: %u", ntohl(id));
983 case CNID_DBD_RES_NOTFOUND:
985 case CNID_DBD_RES_ERR_DB:
994 struct _cnid_module cnid_dbd_module = {
1001 #endif /* CNID_DBD */