2 * $Id: cnid_dbd.c,v 1.12 2009-11-12 10:08:22 didg Exp $
4 * Copyright (C) Joerg Lenneis 2003
5 * All Rights Reserved. See COPYING.
10 #endif /* HAVE_CONFIG_H */
12 #ifdef CNID_BACKEND_DBD
15 #ifdef HAVE_SYS_STAT_H
17 #endif /* HAVE_SYS_STAT_H */
20 #endif /* HAVE_SYS_UIO_H */
26 #include <sys/socket.h>
27 #include <sys/param.h>
29 #include <netinet/in.h>
31 #include <netinet/tcp.h>
32 #include <netinet/in.h>
33 #include <arpa/inet.h>
38 #include <netatalk/endian.h>
39 #include <atalk/logger.h>
40 #include <atalk/adouble.h>
41 #include <atalk/cnid.h>
43 #include <atalk/cnid_dbd_private.h>
46 #define SOL_TCP IPPROTO_TCP
47 #endif /* ! SOL_TCP */
49 static void RQST_RESET(struct cnid_dbd_rqst *r)
51 memset(r, 0, sizeof(struct cnid_dbd_rqst ));
55 extern char *Cnid_srv;
56 extern char *Cnid_port;
60 /* *MUST* be < afp tickle or it's never triggered (got EINTR first) */
63 static void delay(int sec)
69 select(0, NULL, NULL, NULL, &tv);
72 static int tsock_getfd(const char *host, const char *port)
78 struct addrinfo hints, *servinfo, *p;
80 /* Prepare hint for getaddrinfo */
81 memset(&hints, 0, sizeof hints);
82 hints.ai_family = AF_UNSPEC;
83 hints.ai_socktype = SOCK_STREAM;
84 hints.ai_flags = AI_NUMERICSERV;
86 if ((err = getaddrinfo(host, port, &hints, &servinfo)) != 0) {
87 LOG(log_error, logtype_default, "tsock_getfd: getaddrinfo: %s:%s : %s\n", host, port, gai_strerror(err));
91 /* loop through all the results and bind to the first we can */
92 for (p = servinfo; p != NULL; p = p->ai_next) {
93 if ((sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1) {
94 LOG(log_info, logtype_default, "tsock_getfd: socket %s:: %s", host, strerror(errno));
99 if (setsockopt(sock, SOL_TCP, TCP_NODELAY, &attr, sizeof(attr)) == -1) {
100 LOG(log_error, logtype_cnid, "getfd: set TCP_NODELAY %s: %s", host, strerror(errno));
105 tv.tv_sec = SOCK_DELAY;
107 if (setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) < 0) {
108 LOG(log_error, logtype_cnid, "getfd: set SO_RCVTIMEO %s: %s", host, strerror(errno));
113 tv.tv_sec = SOCK_DELAY;
115 if (setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)) < 0) {
116 LOG(log_error, logtype_cnid, "getfd: set SO_SNDTIMEO %s: %s", host, strerror(errno));
121 if (connect(sock, p->ai_addr, p->ai_addrlen) == -1) {
125 LOG(log_error, logtype_cnid, "getfd: connect %s: %s", host, strerror(err));
129 /* We've got a socket */
134 freeaddrinfo(servinfo);
137 LOG(log_error, logtype_cnid, "tsock_getfd: no suitable network config from %s:%s", host, port);
144 /* --------------------- */
145 static int write_vec(int fd, struct iovec *iov, size_t towrite)
150 LOG(log_maxdebug, logtype_cnid, "write_vec: request to write %d bytes", towrite);
152 len1 = iov[1].iov_len;
153 while (towrite > 0) {
154 if (((len = writev(fd, iov, 2)) == -1 && errno == EINTR) || !len)
157 if ((size_t)len == towrite) /* wrote everything out */
159 else if (len < 0) { /* error */
164 if (towrite > len1) { /* skip part of header */
165 iov[0].iov_base = (char *) iov[0].iov_base + len;
166 iov[0].iov_len -= len;
167 } else { /* skip to data */
168 if (iov[0].iov_len) {
169 len -= iov[0].iov_len;
172 iov[1].iov_base = (char *) iov[1].iov_base + len;
173 iov[1].iov_len -= len;
177 LOG(log_maxdebug, logtype_cnid, "write_vec: wrote %d bytes", towrite);
182 /* --------------------- */
183 static int init_tsock(CNID_private *db)
189 LOG(log_debug, logtype_cnid, "init_tsock: BEGIN. Opening volume '%s', CNID Server: %s/%s", db->db_dir, Cnid_srv, Cnid_port);
191 if ((fd = tsock_getfd(Cnid_srv, Cnid_port)) < 0)
194 len = strlen(db->db_dir);
196 iov[0].iov_base = &len;
197 iov[0].iov_len = sizeof(int);
199 iov[1].iov_base = db->db_dir;
200 iov[1].iov_len = len;
202 if (write_vec(fd, iov, len + sizeof(int)) < 0) {
203 LOG(log_error, logtype_cnid, "init_tsock: Error/short write: %s", strerror(errno));
208 LOG(log_debug, logtype_cnid, "init_tsock: ok");
213 /* --------------------- */
214 static int send_packet(CNID_private *db, struct cnid_dbd_rqst *rqst)
219 LOG(log_maxdebug, logtype_cnid, "send_packet: BEGIN");
221 if (!rqst->namelen) {
222 if (write(db->fd, rqst, sizeof(struct cnid_dbd_rqst)) != sizeof(struct cnid_dbd_rqst)) {
223 LOG(log_warning, logtype_cnid, "send_packet: Error/short write rqst (db_dir %s): %s",
224 db->db_dir, strerror(errno));
227 LOG(log_maxdebug, logtype_cnid, "send_packet: OK");
231 iov[0].iov_base = rqst;
232 iov[0].iov_len = sizeof(struct cnid_dbd_rqst);
234 iov[1].iov_base = rqst->name;
235 iov[1].iov_len = rqst->namelen;
237 towrite = sizeof(struct cnid_dbd_rqst) +rqst->namelen;
239 if (write_vec(db->fd, iov, towrite) < 0) {
240 LOG(log_warning, logtype_cnid, "send_packet: Error writev rqst (db_dir %s): %s",
241 db->db_dir, strerror(errno));
245 LOG(log_maxdebug, logtype_cnid, "send_packet: OK");
249 /* ------------------- */
250 static void dbd_initstamp(struct cnid_dbd_rqst *rqst)
253 rqst->op = CNID_DBD_OP_GETSTAMP;
256 /* ------------------- */
257 static int dbd_reply_stamp(struct cnid_dbd_rply *rply)
259 switch (rply->result) {
260 case CNID_DBD_RES_OK:
262 case CNID_DBD_RES_NOTFOUND:
264 case CNID_DBD_RES_ERR_DB:
272 /* ------------------- */
273 static ssize_t dbd_read(int socket, void *data, const size_t length)
279 while (stored < length) {
280 len = read(socket, (u_int8_t *) data + stored, length - stored);
294 /* ---------------------
295 * send a request and get reply
296 * assume send is non blocking
297 * if no answer after sometime (at least MAX_DELAY secondes) return an error
299 static int dbd_rpc(CNID_private *db, struct cnid_dbd_rqst *rqst, struct cnid_dbd_rply *rply)
305 LOG(log_maxdebug, logtype_cnid, "dbd_rpc: BEGIN");
307 if (send_packet(db, rqst) < 0) {
311 nametmp = rply->name;
313 ret = dbd_read(db->fd, rply, sizeof(struct cnid_dbd_rply));
315 if (ret != sizeof(struct cnid_dbd_rply)) {
316 LOG(log_error, logtype_cnid, "dbd_rpc: Error reading header from fd (db_dir %s): %s",
317 db->db_dir, ret == -1?strerror(errno):"closed");
318 rply->name = nametmp;
321 rply->name = nametmp;
322 if (rply->namelen && rply->namelen > len) {
323 LOG(log_error, logtype_cnid,
324 "dbd_rpc: Error reading name (db_dir %s): %s name too long: %d. only wanted %d, garbage?",
325 db->db_dir, rply->name, rply->namelen, len);
328 if (rply->namelen && (ret = dbd_read(db->fd, rply->name, rply->namelen)) != (ssize_t)rply->namelen) {
329 LOG(log_error, logtype_cnid, "dbd_rpc: Error reading name from fd (db_dir %s): %s",
330 db->db_dir, ret == -1?strerror(errno):"closed");
334 LOG(log_maxdebug, logtype_cnid, "dbd_rpc: END");
339 /* -------------------- */
340 static int transmit(CNID_private *db, struct cnid_dbd_rqst *rqst, struct cnid_dbd_rply *rply)
343 int clean = 1; /* no errors so far - to prevent sleep on first try */
345 LOG(log_debug7, logtype_cnid, "transmit: BEGIN");
348 /* volume and db don't have the same timestamp
354 struct cnid_dbd_rqst rqst_stamp;
355 struct cnid_dbd_rply rply_stamp;
356 char stamp[ADEDLEN_PRIVSYN];
358 LOG(log_debug, logtype_cnid, "transmit: connecting to cnid_dbd ...");
359 if ((db->fd = init_tsock(db)) < 0) {
362 dbd_initstamp(&rqst_stamp);
363 memset(stamp, 0, ADEDLEN_PRIVSYN);
364 rply_stamp.name = stamp;
365 rply_stamp.namelen = ADEDLEN_PRIVSYN;
367 if (dbd_rpc(db, &rqst_stamp, &rply_stamp) < 0)
369 if (dbd_reply_stamp(&rply_stamp ) < 0)
373 LOG(log_debug7, logtype_cnid, "transmit: reconnected to cnid_dbd, comparing database stamps...");
374 if (memcmp(stamp, db->stamp, ADEDLEN_PRIVSYN)) {
375 LOG(log_error, logtype_cnid, "transmit: ... not the same db!");
379 LOG(log_debug7, logtype_cnid, "transmit: ... OK.");
383 if (db->client_stamp)
384 memcpy(db->client_stamp, stamp, ADEDLEN_PRIVSYN);
385 memcpy(db->stamp, stamp, ADEDLEN_PRIVSYN);
387 LOG(log_debug, logtype_cnid, "transmit: succesfully attached to cnid_dbd for volume '%s' with stamp '%08lx'.",
388 db->db_dir, *(uint64_t *)stamp);
390 if (!dbd_rpc(db, rqst, rply)) {
391 LOG(log_debug7, logtype_cnid, "transmit: END OK");
397 db->fd = -1; /* FD not valid... will need to reconnect */
400 if (!clean) { /* don't sleep if just got disconnected by cnid server */
402 if (t - orig > MAX_DELAY) {
403 LOG(log_error, logtype_cnid, "transmit: Request to dbd daemon (db_dir %s) timed out.", db->db_dir);
406 /* sleep a little before retry */
409 clean = 0; /* false... next time sleep */
416 /* ---------------------- */
417 static struct _cnid_db *cnid_dbd_new(const char *volpath)
419 struct _cnid_db *cdb;
421 if ((cdb = (struct _cnid_db *)calloc(1, sizeof(struct _cnid_db))) == NULL)
424 if ((cdb->volpath = strdup(volpath)) == NULL) {
429 cdb->flags = CNID_FLAG_PERSISTENT | CNID_FLAG_LAZY_INIT;
431 cdb->cnid_add = cnid_dbd_add;
432 cdb->cnid_delete = cnid_dbd_delete;
433 cdb->cnid_get = cnid_dbd_get;
434 cdb->cnid_lookup = cnid_dbd_lookup;
435 cdb->cnid_nextid = NULL;
436 cdb->cnid_resolve = cnid_dbd_resolve;
437 cdb->cnid_getstamp = cnid_dbd_getstamp;
438 cdb->cnid_update = cnid_dbd_update;
439 cdb->cnid_rebuild_add = cnid_dbd_rebuild_add;
440 cdb->cnid_close = cnid_dbd_close;
445 /* ---------------------- */
446 struct _cnid_db *cnid_dbd_open(const char *dir, mode_t mask _U_)
448 CNID_private *db = NULL;
449 struct _cnid_db *cdb = NULL;
455 if ((cdb = cnid_dbd_new(dir)) == NULL) {
456 LOG(log_error, logtype_cnid, "cnid_open: Unable to allocate memory for database");
460 if ((db = (CNID_private *)calloc(1, sizeof(CNID_private))) == NULL) {
461 LOG(log_error, logtype_cnid, "cnid_open: Unable to allocate memory for database");
462 goto cnid_dbd_open_fail;
467 /* We keep a copy of the directory in the db structure so that we can
468 transparently reconnect later. */
469 strcpy(db->db_dir, dir);
470 db->magic = CNID_DB_MAGIC;
473 LOG(log_debug, logtype_cnid, "cnid_dbd_open: Finished initializing cnid dbd module for volume '%s'", db->db_dir);
479 if (cdb->volpath != NULL) {
490 /* ---------------------- */
491 void cnid_dbd_close(struct _cnid_db *cdb)
496 LOG(log_error, logtype_cnid, "cnid_close called with NULL argument !");
500 if ((db = cdb->_private) != NULL) {
501 LOG(log_info, logtype_cnid, "closing database connection for volume '%s'", db->db_dir);
514 /* ---------------------- */
515 cnid_t cnid_dbd_add(struct _cnid_db *cdb, const struct stat *st,
516 const cnid_t did, char *name, const size_t len,
520 struct cnid_dbd_rqst rqst;
521 struct cnid_dbd_rply rply;
524 if (!cdb || !(db = cdb->_private) || !st || !name) {
525 LOG(log_error, logtype_cnid, "cnid_add: Parameter error");
526 errno = CNID_ERR_PARAM;
530 if (len > MAXPATHLEN) {
531 LOG(log_error, logtype_cnid, "cnid_add: Path name is too long");
532 errno = CNID_ERR_PATH;
537 rqst.op = CNID_DBD_OP_ADD;
539 if (!(cdb->flags & CNID_FLAG_NODEV)) {
540 rqst.dev = st->st_dev;
543 rqst.ino = st->st_ino;
544 rqst.type = S_ISDIR(st->st_mode)?1:0;
549 LOG(log_debug, logtype_cnid, "cnid_dbd_add: CNID: %u, name: '%s', inode: 0x%llx, type: %d (0=file, 1=dir)",
550 ntohl(did), name, (long long)st->st_ino, rqst.type);
553 if (transmit(db, &rqst, &rply) < 0) {
558 switch(rply.result) {
559 case CNID_DBD_RES_OK:
561 LOG(log_debug, logtype_cnid, "cnid_dbd_add: got CNID: %u", ntohl(id));
563 case CNID_DBD_RES_ERR_MAX:
564 errno = CNID_ERR_MAX;
567 case CNID_DBD_RES_ERR_DB:
568 case CNID_DBD_RES_ERR_DUPLCNID:
579 /* ---------------------- */
580 cnid_t cnid_dbd_get(struct _cnid_db *cdb, const cnid_t did, char *name, const size_t len)
583 struct cnid_dbd_rqst rqst;
584 struct cnid_dbd_rply rply;
587 if (!cdb || !(db = cdb->_private) || !name) {
588 LOG(log_error, logtype_cnid, "cnid_dbd_get: Parameter error");
589 errno = CNID_ERR_PARAM;
593 if (len > MAXPATHLEN) {
594 LOG(log_error, logtype_cnid, "cnid_dbd_get: Path name is too long");
595 errno = CNID_ERR_PATH;
599 LOG(log_debug, logtype_cnid, "cnid_dbd_get: DID: %u, name: '%s'", ntohl(did), name);
602 rqst.op = CNID_DBD_OP_GET;
608 if (transmit(db, &rqst, &rply) < 0) {
613 switch(rply.result) {
614 case CNID_DBD_RES_OK:
616 LOG(log_debug, logtype_cnid, "cnid_dbd_get: got CNID: %u", ntohl(id));
618 case CNID_DBD_RES_NOTFOUND:
621 case CNID_DBD_RES_ERR_DB:
632 /* ---------------------- */
633 char *cnid_dbd_resolve(struct _cnid_db *cdb, cnid_t *id, void *buffer, size_t len)
636 struct cnid_dbd_rqst rqst;
637 struct cnid_dbd_rply rply;
640 if (!cdb || !(db = cdb->_private) || !id || !(*id)) {
641 LOG(log_error, logtype_cnid, "cnid_resolve: Parameter error");
642 errno = CNID_ERR_PARAM;
646 LOG(log_debug, logtype_cnid, "cnid_dbd_resolve: resolving CNID: %u", ntohl(*id));
648 /* TODO: We should maybe also check len. At the moment we rely on the caller
649 to provide a buffer that is large enough for MAXPATHLEN plus
650 CNID_HEADER_LEN plus 1 byte, which is large enough for the maximum that
651 can come from the database. */
654 rqst.op = CNID_DBD_OP_RESOLVE;
657 /* This mimicks the behaviour of the "regular" cnid_resolve. So far,
658 nobody uses the content of buffer. It only provides space for the
659 name in the caller. */
660 rply.name = (char *)buffer + CNID_HEADER_LEN;
661 rply.namelen = len - CNID_HEADER_LEN;
663 if (transmit(db, &rqst, &rply) < 0) {
669 switch (rply.result) {
670 case CNID_DBD_RES_OK:
673 LOG(log_debug, logtype_cnid, "cnid_dbd_resolve: resolved did: %u, name: '%s'", ntohl(*id), name);
675 case CNID_DBD_RES_NOTFOUND:
679 case CNID_DBD_RES_ERR_DB:
691 /* ---------------------- */
692 int cnid_dbd_getstamp(struct _cnid_db *cdb, void *buffer, const size_t len)
696 if (!cdb || !(db = cdb->_private) || len != ADEDLEN_PRIVSYN) {
697 LOG(log_error, logtype_cnid, "cnid_getstamp: Parameter error");
698 errno = CNID_ERR_PARAM;
701 db->client_stamp = buffer;
702 db->stamp_size = len;
703 memset(buffer,0, len);
707 /* ---------------------- */
708 cnid_t cnid_dbd_lookup(struct _cnid_db *cdb, const struct stat *st, const cnid_t did,
709 char *name, const size_t len)
712 struct cnid_dbd_rqst rqst;
713 struct cnid_dbd_rply rply;
716 if (!cdb || !(db = cdb->_private) || !st || !name) {
717 LOG(log_error, logtype_cnid, "cnid_lookup: Parameter error");
718 errno = CNID_ERR_PARAM;
722 if (len > MAXPATHLEN) {
723 LOG(log_error, logtype_cnid, "cnid_lookup: Path name is too long");
724 errno = CNID_ERR_PATH;
729 rqst.op = CNID_DBD_OP_LOOKUP;
731 if (!(cdb->flags & CNID_FLAG_NODEV)) {
732 rqst.dev = st->st_dev;
735 rqst.ino = st->st_ino;
736 rqst.type = S_ISDIR(st->st_mode)?1:0;
741 LOG(log_debug, logtype_cnid, "cnid_dbd_lookup: CNID: %u, name: '%s', inode: 0x%llx, type: %d (0=file, 1=dir)",
742 ntohl(did), name, (long long)st->st_ino, rqst.type);
745 if (transmit(db, &rqst, &rply) < 0) {
750 switch (rply.result) {
751 case CNID_DBD_RES_OK:
753 LOG(log_debug, logtype_cnid, "cnid_dbd_lookup: got CNID: %u", ntohl(id));
755 case CNID_DBD_RES_NOTFOUND:
758 case CNID_DBD_RES_ERR_DB:
769 /* ---------------------- */
770 int cnid_dbd_update(struct _cnid_db *cdb, const cnid_t id, const struct stat *st,
771 const cnid_t did, char *name, const size_t len)
774 struct cnid_dbd_rqst rqst;
775 struct cnid_dbd_rply rply;
777 if (!cdb || !(db = cdb->_private) || !id || !st || !name) {
778 LOG(log_error, logtype_cnid, "cnid_update: Parameter error");
779 errno = CNID_ERR_PARAM;
783 if (len > MAXPATHLEN) {
784 LOG(log_error, logtype_cnid, "cnid_update: Path name is too long");
785 errno = CNID_ERR_PATH;
790 rqst.op = CNID_DBD_OP_UPDATE;
792 if (!(cdb->flags & CNID_FLAG_NODEV)) {
793 rqst.dev = st->st_dev;
795 rqst.ino = st->st_ino;
796 rqst.type = S_ISDIR(st->st_mode)?1:0;
801 LOG(log_debug, logtype_cnid, "cnid_dbd_update: CNID: %u, name: '%s', inode: 0x%llx, type: %d (0=file, 1=dir)",
802 ntohl(id), name, (long long)st->st_ino, rqst.type);
805 if (transmit(db, &rqst, &rply) < 0) {
810 switch (rply.result) {
811 case CNID_DBD_RES_OK:
812 LOG(log_debug, logtype_cnid, "cnid_dbd_update: updated");
813 case CNID_DBD_RES_NOTFOUND:
815 case CNID_DBD_RES_ERR_DB:
823 /* ---------------------- */
824 cnid_t cnid_dbd_rebuild_add(struct _cnid_db *cdb, const struct stat *st,
825 const cnid_t did, char *name, const size_t len,
829 struct cnid_dbd_rqst rqst;
830 struct cnid_dbd_rply rply;
833 if (!cdb || !(db = cdb->_private) || !st || !name || hint == CNID_INVALID) {
834 LOG(log_error, logtype_cnid, "cnid_rebuild_add: Parameter error");
835 errno = CNID_ERR_PARAM;
839 if (len > MAXPATHLEN) {
840 LOG(log_error, logtype_cnid, "cnid_rebuild_add: Path name is too long");
841 errno = CNID_ERR_PATH;
846 rqst.op = CNID_DBD_OP_REBUILD_ADD;
848 if (!(cdb->flags & CNID_FLAG_NODEV)) {
849 rqst.dev = st->st_dev;
852 rqst.ino = st->st_ino;
853 rqst.type = S_ISDIR(st->st_mode)?1:0;
859 LOG(log_debug, logtype_cnid, "cnid_dbd_rebuild_add: CNID: %u, name: '%s', inode: 0x%llx, type: %d (0=file, 1=dir), hint: %u",
860 ntohl(did), name, (long long)st->st_ino, rqst.type, hint);
862 if (transmit(db, &rqst, &rply) < 0) {
867 switch(rply.result) {
868 case CNID_DBD_RES_OK:
870 LOG(log_debug, logtype_cnid, "cnid_dbd_rebuild_add: got CNID: %u", ntohl(id));
872 case CNID_DBD_RES_ERR_MAX:
873 errno = CNID_ERR_MAX;
876 case CNID_DBD_RES_ERR_DB:
877 case CNID_DBD_RES_ERR_DUPLCNID:
887 /* ---------------------- */
888 int cnid_dbd_delete(struct _cnid_db *cdb, const cnid_t id)
891 struct cnid_dbd_rqst rqst;
892 struct cnid_dbd_rply rply;
894 if (!cdb || !(db = cdb->_private) || !id) {
895 LOG(log_error, logtype_cnid, "cnid_delete: Parameter error");
896 errno = CNID_ERR_PARAM;
900 LOG(log_debug, logtype_cnid, "cnid_dbd_delete: delete CNID: %u", ntohl(id));
903 rqst.op = CNID_DBD_OP_DELETE;
907 if (transmit(db, &rqst, &rply) < 0) {
912 switch (rply.result) {
913 case CNID_DBD_RES_OK:
914 LOG(log_debug, logtype_cnid, "cnid_dbd_delete: deleted CNID: %u", ntohl(id));
915 case CNID_DBD_RES_NOTFOUND:
917 case CNID_DBD_RES_ERR_DB:
926 struct _cnid_module cnid_dbd_module = {
933 #endif /* CNID_DBD */