2 * $Id: cnid_dbd.c,v 1.4 2005-09-07 15:23:22 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[MAXHOSTNAMELEN + 1];
58 static int tsock_getfd(char *host, int port)
61 struct sockaddr_in server;
66 server.sin_family=AF_INET;
67 server.sin_port=htons((unsigned short)port);
69 LOG(log_error, logtype_cnid, "getfd: -cnidserver not defined");
73 hp=gethostbyname(host);
75 unsigned long int addr=inet_addr(host);
76 LOG(log_warning, logtype_cnid, "getfd: Could not resolve host %s, trying numeric address instead", host);
77 if (addr!= (unsigned)-1)
78 hp=gethostbyaddr((char*)addr,sizeof(addr),AF_INET);
81 LOG(log_error, logtype_cnid, "getfd: Could not resolve host %s", host);
85 memcpy((char*)&server.sin_addr,(char*)hp->h_addr,sizeof(server.sin_addr));
86 sock=socket(PF_INET,SOCK_STREAM,0);
88 LOG(log_error, logtype_cnid, "getfd: socket %s: %s", host, strerror(errno));
92 if (setsockopt(sock, SOL_TCP, TCP_NODELAY, &attr, sizeof(attr)) == -1) {
93 LOG(log_error, logtype_cnid, "getfd: set TCP_NODELAY %s: %s", host, strerror(errno));
97 if(connect(sock ,(struct sockaddr*)&server,sizeof(server))==-1) {
102 LOG(log_error, logtype_cnid, "getfd: connect %s: %s", host, strerror(err));
109 select(0, NULL, NULL, NULL, &tv);
116 /* --------------------- */
117 static int write_vec(int fd, struct iovec *iov, size_t towrite)
122 len1 = iov[1].iov_len;
123 while (towrite > 0) {
124 if (((len = writev(fd, iov, 2)) == -1 && errno == EINTR) || !len)
127 if ((size_t)len == towrite) /* wrote everything out */
129 else if (len < 0) { /* error */
134 if (towrite > len1) { /* skip part of header */
135 iov[0].iov_base = (char *) iov[0].iov_base + len;
136 iov[0].iov_len -= len;
137 } else { /* skip to data */
138 if (iov[0].iov_len) {
139 len -= iov[0].iov_len;
142 iov[1].iov_base = (char *) iov[1].iov_base + len;
143 iov[1].iov_len -= len;
149 /* --------------------- */
150 static int init_tsock(CNID_private *db)
156 if ((fd = tsock_getfd(Cnid_srv, Cnid_port)) < 0)
159 len = strlen(db->db_dir);
161 iov[0].iov_base = &len;
162 iov[0].iov_len = sizeof(int);
164 iov[1].iov_base = db->db_dir;
165 iov[1].iov_len = len;
167 if (write_vec(fd, iov, len + sizeof(int)) < 0) {
168 LOG(log_error, logtype_cnid, "init_tsock: Error/short write: %s", strerror(errno));
175 /* --------------------- */
176 static int send_packet(CNID_private *db, struct cnid_dbd_rqst *rqst, int silent)
182 if (!rqst->namelen) {
183 if (write(db->fd, rqst, sizeof(struct cnid_dbd_rqst)) != sizeof(struct cnid_dbd_rqst)) {
185 LOG(log_warning, logtype_cnid, "send_packet: Error/short write rqst (db_dir %s): %s",
186 db->db_dir, strerror(errno));
192 iov[0].iov_base = rqst;
193 iov[0].iov_len = sizeof(struct cnid_dbd_rqst);
195 iov[1].iov_base = rqst->name;
196 iov[1].iov_len = rqst->namelen;
198 towrite = sizeof(struct cnid_dbd_rqst) +rqst->namelen;
200 if (write_vec(db->fd, iov, towrite) < 0) {
202 LOG(log_warning, logtype_cnid, "send_packet: Error writev rqst (db_dir %s): %s",
203 db->db_dir, strerror(errno));
210 /* ------------------- */
211 static void dbd_initstamp(struct cnid_dbd_rqst *rqst)
214 rqst->op = CNID_DBD_OP_GETSTAMP;
217 /* ------------------- */
218 static int dbd_reply_stamp(struct cnid_dbd_rply *rply)
220 switch (rply->result) {
221 case CNID_DBD_RES_OK:
223 case CNID_DBD_RES_NOTFOUND:
225 case CNID_DBD_RES_ERR_DB:
233 /* ---------------------
234 * send a request and get reply
235 * assume send is non blocking
236 * if no answer after sometime (at least MAX_DELAY secondes) return an error
239 static int dbd_rpc(CNID_private *db, struct cnid_dbd_rqst *rqst, struct cnid_dbd_rply *rply, int silent)
248 if (send_packet(db, rqst, silent) < 0) {
252 FD_SET(db->fd, &readfds);
256 tv.tv_sec = MAX_DELAY;
257 while ((ret = select(maxfd + 1, &readfds, NULL, NULL, &tv)) < 0 && errno == EINTR);
261 LOG(log_error, logtype_cnid, "dbd_rpc: Error in select (db_dir %s): %s",
262 db->db_dir, strerror(errno));
269 LOG(log_error, logtype_cnid, "dbd_rpc: select timed out (db_dir %s)",
275 nametmp = rply->name;
276 /* assume that if we have something then everything is there (doesn't sleep) */
277 if ((ret = read(db->fd, rply, sizeof(struct cnid_dbd_rply))) != sizeof(struct cnid_dbd_rply)) {
279 LOG(log_error, logtype_cnid, "dbd_rpc: Error reading header from fd (db_dir %s): %s",
280 db->db_dir, ret == -1?strerror(errno):"closed");
281 rply->name = nametmp;
284 rply->name = nametmp;
285 if (rply->namelen && rply->namelen > len) {
287 LOG(log_error, logtype_cnid,
288 "dbd_rpc: Error reading name (db_dir %s): %s name too long wanted %d only %d, garbage?",
289 db->db_dir, rply->namelen, len);
292 if (rply->namelen && (ret = read(db->fd, rply->name, rply->namelen)) != (ssize_t)rply->namelen) {
294 LOG(log_error, logtype_cnid, "dbd_rpc: Error reading name from fd (db_dir %s): %s",
295 db->db_dir, ret == -1?strerror(errno):"closed");
301 /* -------------------- */
302 static int transmit(CNID_private *db, struct cnid_dbd_rqst *rqst, struct cnid_dbd_rply *rply)
309 /* volume and db don't have the same timestamp
317 struct cnid_dbd_rqst rqst_stamp;
318 struct cnid_dbd_rply rply_stamp;
319 char stamp[ADEDLEN_PRIVSYN];
321 if ((db->fd = init_tsock(db)) < 0) {
323 if (t - orig > MAX_DELAY)
327 dbd_initstamp(&rqst_stamp);
328 memset(stamp, 0, ADEDLEN_PRIVSYN);
329 rply_stamp.name = stamp;
330 rply_stamp.namelen = ADEDLEN_PRIVSYN;
332 if (dbd_rpc(db, &rqst_stamp, &rply_stamp, silent) < 0)
334 if (dbd_reply_stamp(&rply_stamp ) < 0)
338 if (memcmp(stamp, db->stamp, ADEDLEN_PRIVSYN)) {
339 LOG(log_error, logtype_cnid, "transmit: not the same db!");
346 if (db->client_stamp) {
347 memcpy(db->client_stamp, stamp, ADEDLEN_PRIVSYN);
349 memcpy(db->stamp, stamp, ADEDLEN_PRIVSYN);
352 if (!dbd_rpc(db, rqst, rply, silent)) {
356 silent = 0; /* From now on dbd_rpc and subroutines called from there
357 will log messages if something goes wrong again */
362 if (t - orig > MAX_DELAY) {
363 LOG(log_error, logtype_cnid, "transmit: Request to dbd daemon (db_dir %s) timed out.", db->db_dir);
367 /* sleep a little before retry */
371 select(0, NULL, NULL, NULL, &tv);
376 /* ---------------------- */
377 static struct _cnid_db *cnid_dbd_new(const char *volpath)
379 struct _cnid_db *cdb;
381 if ((cdb = (struct _cnid_db *)calloc(1, sizeof(struct _cnid_db))) == NULL)
384 if ((cdb->volpath = strdup(volpath)) == NULL) {
389 cdb->flags = CNID_FLAG_PERSISTENT | CNID_FLAG_LAZY_INIT;
391 cdb->cnid_add = cnid_dbd_add;
392 cdb->cnid_delete = cnid_dbd_delete;
393 cdb->cnid_get = cnid_dbd_get;
394 cdb->cnid_lookup = cnid_dbd_lookup;
395 cdb->cnid_nextid = NULL;
396 cdb->cnid_resolve = cnid_dbd_resolve;
397 cdb->cnid_getstamp = cnid_dbd_getstamp;
398 cdb->cnid_update = cnid_dbd_update;
399 cdb->cnid_rebuild_add = cnid_dbd_rebuild_add;
400 cdb->cnid_close = cnid_dbd_close;
405 /* ---------------------- */
406 struct _cnid_db *cnid_dbd_open(const char *dir, mode_t mask _U_)
408 CNID_private *db = NULL;
409 struct _cnid_db *cdb = NULL;
415 if ((cdb = cnid_dbd_new(dir)) == NULL) {
416 LOG(log_error, logtype_default, "cnid_open: Unable to allocate memory for database");
420 if ((db = (CNID_private *)calloc(1, sizeof(CNID_private))) == NULL) {
421 LOG(log_error, logtype_cnid, "cnid_open: Unable to allocate memory for database");
422 goto cnid_dbd_open_fail;
427 /* We keep a copy of the directory in the db structure so that we can
428 transparently reconnect later. */
429 strcpy(db->db_dir, dir);
430 db->magic = CNID_DB_MAGIC;
433 LOG(log_info, logtype_cnid, "opening database connection to %s", db->db_dir);
439 if (cdb->volpath != NULL) {
450 /* ---------------------- */
451 void cnid_dbd_close(struct _cnid_db *cdb)
456 LOG(log_error, logtype_afpd, "cnid_close called with NULL argument !");
460 if ((db = cdb->_private) != NULL) {
462 LOG(log_info, logtype_cnid, "closing database connection to %s", db->db_dir);
475 /* ---------------------- */
476 cnid_t cnid_dbd_add(struct _cnid_db *cdb, const struct stat *st,
477 const cnid_t did, char *name, const size_t len,
481 struct cnid_dbd_rqst rqst;
482 struct cnid_dbd_rply rply;
485 if (!cdb || !(db = cdb->_private) || !st || !name) {
486 LOG(log_error, logtype_cnid, "cnid_add: Parameter error");
487 errno = CNID_ERR_PARAM;
491 if (len > MAXPATHLEN) {
492 LOG(log_error, logtype_cnid, "cnid_add: Path name is too long");
493 errno = CNID_ERR_PATH;
498 rqst.op = CNID_DBD_OP_ADD;
500 if (!(cdb->flags & CNID_FLAG_NODEV)) {
501 rqst.dev = st->st_dev;
504 rqst.ino = st->st_ino;
505 rqst.type = S_ISDIR(st->st_mode)?1:0;
511 if (transmit(db, &rqst, &rply) < 0) {
516 switch(rply.result) {
517 case CNID_DBD_RES_OK:
520 case CNID_DBD_RES_ERR_MAX:
521 errno = CNID_ERR_MAX;
524 case CNID_DBD_RES_ERR_DB:
525 case CNID_DBD_RES_ERR_DUPLCNID:
535 /* ---------------------- */
536 cnid_t cnid_dbd_get(struct _cnid_db *cdb, const cnid_t did, char *name, const size_t len)
539 struct cnid_dbd_rqst rqst;
540 struct cnid_dbd_rply rply;
544 if (!cdb || !(db = cdb->_private) || !name) {
545 LOG(log_error, logtype_cnid, "cnid_get: Parameter error");
546 errno = CNID_ERR_PARAM;
550 if (len > MAXPATHLEN) {
551 LOG(log_error, logtype_cnid, "cnid_add: Path name is too long");
552 errno = CNID_ERR_PATH;
557 rqst.op = CNID_DBD_OP_GET;
563 if (transmit(db, &rqst, &rply) < 0) {
568 switch(rply.result) {
569 case CNID_DBD_RES_OK:
572 case CNID_DBD_RES_NOTFOUND:
575 case CNID_DBD_RES_ERR_DB:
586 /* ---------------------- */
587 char *cnid_dbd_resolve(struct _cnid_db *cdb, cnid_t *id, void *buffer, size_t len)
590 struct cnid_dbd_rqst rqst;
591 struct cnid_dbd_rply rply;
594 if (!cdb || !(db = cdb->_private) || !id || !(*id)) {
595 LOG(log_error, logtype_cnid, "cnid_resolve: Parameter error");
596 errno = CNID_ERR_PARAM;
600 /* TODO: We should maybe also check len. At the moment we rely on the caller
601 to provide a buffer that is large enough for MAXPATHLEN plus
602 CNID_HEADER_LEN plus 1 byte, which is large enough for the maximum that
603 can come from the database. */
606 rqst.op = CNID_DBD_OP_RESOLVE;
609 /* This mimicks the behaviour of the "regular" cnid_resolve. So far,
610 nobody uses the content of buffer. It only provides space for the
611 name in the caller. */
612 rply.name = (char *)buffer + CNID_HEADER_LEN;
613 rply.namelen = len - CNID_HEADER_LEN;
615 if (transmit(db, &rqst, &rply) < 0) {
621 switch (rply.result) {
622 case CNID_DBD_RES_OK:
626 case CNID_DBD_RES_NOTFOUND:
630 case CNID_DBD_RES_ERR_DB:
642 /* ---------------------- */
643 int cnid_dbd_getstamp(struct _cnid_db *cdb, void *buffer, const size_t len)
647 if (!cdb || !(db = cdb->_private) || len != ADEDLEN_PRIVSYN) {
648 LOG(log_error, logtype_cnid, "cnid_getstamp: Parameter error");
649 errno = CNID_ERR_PARAM;
652 db->client_stamp = buffer;
653 db->stamp_size = len;
654 memset(buffer,0, len);
658 /* ---------------------- */
659 cnid_t cnid_dbd_lookup(struct _cnid_db *cdb, const struct stat *st, const cnid_t did,
660 char *name, const size_t len)
663 struct cnid_dbd_rqst rqst;
664 struct cnid_dbd_rply rply;
667 if (!cdb || !(db = cdb->_private) || !st || !name) {
668 LOG(log_error, logtype_cnid, "cnid_lookup: Parameter error");
669 errno = CNID_ERR_PARAM;
673 if (len > MAXPATHLEN) {
674 LOG(log_error, logtype_cnid, "cnid_lookup: Path name is too long");
675 errno = CNID_ERR_PATH;
680 rqst.op = CNID_DBD_OP_LOOKUP;
682 if (!(cdb->flags & CNID_FLAG_NODEV)) {
683 rqst.dev = st->st_dev;
686 rqst.ino = st->st_ino;
687 rqst.type = S_ISDIR(st->st_mode)?1:0;
693 if (transmit(db, &rqst, &rply) < 0) {
698 switch (rply.result) {
699 case CNID_DBD_RES_OK:
702 case CNID_DBD_RES_NOTFOUND:
705 case CNID_DBD_RES_ERR_DB:
716 /* ---------------------- */
717 int cnid_dbd_update(struct _cnid_db *cdb, const cnid_t id, const struct stat *st,
718 const cnid_t did, char *name, const size_t len)
721 struct cnid_dbd_rqst rqst;
722 struct cnid_dbd_rply rply;
725 if (!cdb || !(db = cdb->_private) || !id || !st || !name) {
726 LOG(log_error, logtype_cnid, "cnid_update: Parameter error");
727 errno = CNID_ERR_PARAM;
731 if (len > MAXPATHLEN) {
732 LOG(log_error, logtype_cnid, "cnid_update: Path name is too long");
733 errno = CNID_ERR_PATH;
738 rqst.op = CNID_DBD_OP_UPDATE;
740 if (!(cdb->flags & CNID_FLAG_NODEV)) {
741 rqst.dev = st->st_dev;
743 rqst.ino = st->st_ino;
744 rqst.type = S_ISDIR(st->st_mode)?1:0;
750 if (transmit(db, &rqst, &rply) < 0) {
755 switch (rply.result) {
756 case CNID_DBD_RES_OK:
757 case CNID_DBD_RES_NOTFOUND:
759 case CNID_DBD_RES_ERR_DB:
767 /* ---------------------- */
768 cnid_t cnid_dbd_rebuild_add(struct _cnid_db *cdb, const struct stat *st,
769 const cnid_t did, char *name, const size_t len,
773 struct cnid_dbd_rqst rqst;
774 struct cnid_dbd_rply rply;
777 if (!cdb || !(db = cdb->_private) || !st || !name || hint == CNID_INVALID) {
778 LOG(log_error, logtype_cnid, "cnid_rebuild_add: Parameter error");
779 errno = CNID_ERR_PARAM;
783 if (len > MAXPATHLEN) {
784 LOG(log_error, logtype_cnid, "cnid_rebuild_add: Path name is too long");
785 errno = CNID_ERR_PATH;
790 rqst.op = CNID_DBD_OP_REBUILD_ADD;
792 if (!(cdb->flags & CNID_FLAG_NODEV)) {
793 rqst.dev = st->st_dev;
796 rqst.ino = st->st_ino;
797 rqst.type = S_ISDIR(st->st_mode)?1:0;
803 if (transmit(db, &rqst, &rply) < 0) {
808 switch(rply.result) {
809 case CNID_DBD_RES_OK:
812 case CNID_DBD_RES_ERR_MAX:
813 errno = CNID_ERR_MAX;
816 case CNID_DBD_RES_ERR_DB:
817 case CNID_DBD_RES_ERR_DUPLCNID:
827 /* ---------------------- */
828 int cnid_dbd_delete(struct _cnid_db *cdb, const cnid_t id)
831 struct cnid_dbd_rqst rqst;
832 struct cnid_dbd_rply rply;
835 if (!cdb || !(db = cdb->_private) || !id) {
836 LOG(log_error, logtype_cnid, "cnid_delete: Parameter error");
837 errno = CNID_ERR_PARAM;
842 rqst.op = CNID_DBD_OP_DELETE;
846 if (transmit(db, &rqst, &rply) < 0) {
851 switch (rply.result) {
852 case CNID_DBD_RES_OK:
853 case CNID_DBD_RES_NOTFOUND:
855 case CNID_DBD_RES_ERR_DB:
864 struct _cnid_module cnid_dbd_module = {
871 #endif /* CNID_DBD */