Add and correct NOTICE files.
Add NOTICE file for ip-up-vpn.
Remove GPLed code from pppd (wasn't being compiled in), and
fix up pppd/NOTICE to reflect.
Change-Id: I44b7b2680f65013f96f0043e40e8deeebabe2ec4
diff --git a/android/NOTICE b/android/NOTICE
new file mode 100644
index 0000000..7cd7083
--- /dev/null
+++ b/android/NOTICE
@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
diff --git a/pppd/NOTICE b/pppd/NOTICE
index 3923192..ec8eb61 100644
--- a/pppd/NOTICE
+++ b/pppd/NOTICE
@@ -250,21 +250,3 @@
is a federation of seven research units funded by the CNRS, National
Polytechnic Institute of Grenoble and University Joseph Fourier.
The research unit in Software, Systems, Networks (LSR) is member of IMAG.
-
-Copyright (C) Anton Blanchard 2001
-Copyright (C) Andrew Tridgell 1999-2004
-Copyright (C) Paul `Rusty' Russell 2000
-Copyright (C) Jeremy Allison 2000-2003
-This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
diff --git a/pppd/README.google b/pppd/README.google
new file mode 100644
index 0000000..6f249f0
--- /dev/null
+++ b/pppd/README.google
@@ -0,0 +1,2 @@
+Notes:
+Removed multilink.c, spinlock.[ch], tdb.[ch] as they are unused.
diff --git a/pppd/multilink.c b/pppd/multilink.c
deleted file mode 100644
index b4748cd..0000000
--- a/pppd/multilink.c
+++ /dev/null
@@ -1,589 +0,0 @@
-/*
- * multilink.c - support routines for multilink.
- *
- * Copyright (c) 2000-2002 Paul Mackerras. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. The name(s) of the authors of this software must not be used to
- * endorse or promote products derived from this software without
- * prior written permission.
- *
- * 3. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by Paul Mackerras
- * <paulus@samba.org>".
- *
- * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
- * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
- * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
- * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
- * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-#include <string.h>
-#include <ctype.h>
-#include <stdlib.h>
-#include <netdb.h>
-#include <errno.h>
-#include <signal.h>
-#include <netinet/in.h>
-#include <unistd.h>
-
-#include "pppd.h"
-#include "fsm.h"
-#include "lcp.h"
-#include "tdb.h"
-
-bool endpoint_specified; /* user gave explicit endpoint discriminator */
-char *bundle_id; /* identifier for our bundle */
-char *blinks_id; /* key for the list of links */
-bool doing_multilink; /* multilink was enabled and agreed to */
-bool multilink_master; /* we own the multilink bundle */
-
-extern TDB_CONTEXT *pppdb;
-extern char db_key[];
-
-static void make_bundle_links __P((int append));
-static void remove_bundle_link __P((void));
-static void iterate_bundle_links __P((void (*func) __P((char *))));
-
-static int get_default_epdisc __P((struct epdisc *));
-static int parse_num __P((char *str, const char *key, int *valp));
-static int owns_unit __P((TDB_DATA pid, int unit));
-
-#define set_ip_epdisc(ep, addr) do { \
- ep->length = 4; \
- ep->value[0] = addr >> 24; \
- ep->value[1] = addr >> 16; \
- ep->value[2] = addr >> 8; \
- ep->value[3] = addr; \
-} while (0)
-
-#define LOCAL_IP_ADDR(addr) \
- (((addr) & 0xff000000) == 0x0a000000 /* 10.x.x.x */ \
- || ((addr) & 0xfff00000) == 0xac100000 /* 172.16.x.x */ \
- || ((addr) & 0xffff0000) == 0xc0a80000) /* 192.168.x.x */
-
-#define process_exists(n) (kill((n), 0) == 0 || errno != ESRCH)
-
-void
-mp_check_options()
-{
- lcp_options *wo = &lcp_wantoptions[0];
- lcp_options *ao = &lcp_allowoptions[0];
-
- doing_multilink = 0;
- if (!multilink)
- return;
- /* if we're doing multilink, we have to negotiate MRRU */
- if (!wo->neg_mrru) {
- /* mrru not specified, default to mru */
- wo->mrru = wo->mru;
- wo->neg_mrru = 1;
- }
- ao->mrru = ao->mru;
- ao->neg_mrru = 1;
-
- if (!wo->neg_endpoint && !noendpoint) {
- /* get a default endpoint value */
- wo->neg_endpoint = get_default_epdisc(&wo->endpoint);
- }
-}
-
-/*
- * Make a new bundle or join us to an existing bundle
- * if we are doing multilink.
- */
-int
-mp_join_bundle()
-{
- lcp_options *go = &lcp_gotoptions[0];
- lcp_options *ho = &lcp_hisoptions[0];
- lcp_options *ao = &lcp_allowoptions[0];
- int unit, pppd_pid;
- int l, mtu;
- char *p;
- TDB_DATA key, pid, rec;
-
- if (doing_multilink) {
- /* have previously joined a bundle */
- if (!go->neg_mrru || !ho->neg_mrru) {
- notice("oops, didn't get multilink on renegotiation");
- lcp_close(0, "multilink required");
- return 0;
- }
- /* XXX should check the peer_authname and ho->endpoint
- are the same as previously */
- return 0;
- }
-
- if (!go->neg_mrru || !ho->neg_mrru) {
- /* not doing multilink */
- if (go->neg_mrru)
- notice("oops, multilink negotiated only for receive");
- mtu = ho->neg_mru? ho->mru: PPP_MRU;
- if (mtu > ao->mru)
- mtu = ao->mru;
- if (demand) {
- /* already have a bundle */
- cfg_bundle(0, 0, 0, 0);
- netif_set_mtu(0, mtu);
- return 0;
- }
- make_new_bundle(0, 0, 0, 0);
- set_ifunit(1);
- netif_set_mtu(0, mtu);
- return 0;
- }
-
- doing_multilink = 1;
-
- /*
- * Find the appropriate bundle or join a new one.
- * First we make up a name for the bundle.
- * The length estimate is worst-case assuming every
- * character has to be quoted.
- */
- l = 4 * strlen(peer_authname) + 10;
- if (ho->neg_endpoint)
- l += 3 * ho->endpoint.length + 8;
- if (bundle_name)
- l += 3 * strlen(bundle_name) + 2;
- bundle_id = malloc(l);
- if (bundle_id == 0)
- novm("bundle identifier");
-
- p = bundle_id;
- p += slprintf(p, l-1, "BUNDLE=\"%q\"", peer_authname);
- if (ho->neg_endpoint || bundle_name)
- *p++ = '/';
- if (ho->neg_endpoint)
- p += slprintf(p, bundle_id+l-p, "%s",
- epdisc_to_str(&ho->endpoint));
- if (bundle_name)
- p += slprintf(p, bundle_id+l-p, "/%v", bundle_name);
-
- /* Make the key for the list of links belonging to the bundle */
- l = p - bundle_id;
- blinks_id = malloc(l + 7);
- if (blinks_id == NULL)
- novm("bundle links key");
- slprintf(blinks_id, l + 7, "BUNDLE_LINKS=%s", bundle_id + 7);
-
- /*
- * For demand mode, we only need to configure the bundle
- * and attach the link.
- */
- mtu = MIN(ho->mrru, ao->mru);
- if (demand) {
- cfg_bundle(go->mrru, ho->mrru, go->neg_ssnhf, ho->neg_ssnhf);
- netif_set_mtu(0, mtu);
- script_setenv("BUNDLE", bundle_id + 7, 1);
- return 0;
- }
-
- /*
- * Check if the bundle ID is already in the database.
- */
- unit = -1;
- lock_db();
- key.dptr = bundle_id;
- key.dsize = p - bundle_id;
- pid = tdb_fetch(pppdb, key);
- if (pid.dptr != NULL) {
- /* bundle ID exists, see if the pppd record exists */
- rec = tdb_fetch(pppdb, pid);
- if (rec.dptr != NULL && rec.dsize > 0) {
- /* make sure the string is null-terminated */
- rec.dptr[rec.dsize-1] = 0;
- /* parse the interface number */
- parse_num(rec.dptr, "IFNAME=ppp", &unit);
- /* check the pid value */
- if (!parse_num(rec.dptr, "PPPD_PID=", &pppd_pid)
- || !process_exists(pppd_pid)
- || !owns_unit(pid, unit))
- unit = -1;
- free(rec.dptr);
- }
- free(pid.dptr);
- }
-
- if (unit >= 0) {
- /* attach to existing unit */
- if (bundle_attach(unit)) {
- set_ifunit(0);
- script_setenv("BUNDLE", bundle_id + 7, 0);
- make_bundle_links(1);
- unlock_db();
- info("Link attached to %s", ifname);
- return 1;
- }
- /* attach failed because bundle doesn't exist */
- }
-
- /* we have to make a new bundle */
- make_new_bundle(go->mrru, ho->mrru, go->neg_ssnhf, ho->neg_ssnhf);
- set_ifunit(1);
- netif_set_mtu(0, mtu);
- script_setenv("BUNDLE", bundle_id + 7, 1);
- make_bundle_links(0);
- unlock_db();
- info("New bundle %s created", ifname);
- multilink_master = 1;
- return 0;
-}
-
-void mp_exit_bundle()
-{
- lock_db();
- remove_bundle_link();
- unlock_db();
-}
-
-static void sendhup(char *str)
-{
- int pid;
-
- if (parse_num(str, "PPPD_PID=", &pid) && pid != getpid()) {
- if (debug)
- dbglog("sending SIGHUP to process %d", pid);
- kill(pid, SIGHUP);
- }
-}
-
-void mp_bundle_terminated()
-{
- TDB_DATA key;
-
- bundle_terminating = 1;
- upper_layers_down(0);
- notice("Connection terminated.");
- print_link_stats();
- if (!demand) {
- remove_pidfiles();
- script_unsetenv("IFNAME");
- }
-
- lock_db();
- destroy_bundle();
- iterate_bundle_links(sendhup);
- key.dptr = blinks_id;
- key.dsize = strlen(blinks_id);
- tdb_delete(pppdb, key);
- unlock_db();
-
-new_phase(PHASE_DEAD);
-}
-
-static void make_bundle_links(int append)
-{
- TDB_DATA key, rec;
- char *p;
- char entry[32];
- int l;
-
- key.dptr = blinks_id;
- key.dsize = strlen(blinks_id);
- slprintf(entry, sizeof(entry), "%s;", db_key);
- p = entry;
- if (append) {
- rec = tdb_fetch(pppdb, key);
- if (rec.dptr != NULL && rec.dsize > 0) {
- rec.dptr[rec.dsize-1] = 0;
- if (strstr(rec.dptr, db_key) != NULL) {
- /* already in there? strange */
- warn("link entry already exists in tdb");
- return;
- }
- l = rec.dsize + strlen(entry);
- p = malloc(l);
- if (p == NULL)
- novm("bundle link list");
- slprintf(p, l, "%s%s", rec.dptr, entry);
- } else {
- warn("bundle link list not found");
- }
- if (rec.dptr != NULL)
- free(rec.dptr);
- }
- rec.dptr = p;
- rec.dsize = strlen(p) + 1;
- if (tdb_store(pppdb, key, rec, TDB_REPLACE))
- error("couldn't %s bundle link list",
- append? "update": "create");
- if (p != entry)
- free(p);
-}
-
-static void remove_bundle_link()
-{
- TDB_DATA key, rec;
- char entry[32];
- char *p, *q;
- int l;
-
- key.dptr = blinks_id;
- key.dsize = strlen(blinks_id);
- slprintf(entry, sizeof(entry), "%s;", db_key);
-
- rec = tdb_fetch(pppdb, key);
- if (rec.dptr == NULL || rec.dsize <= 0) {
- if (rec.dptr != NULL)
- free(rec.dptr);
- return;
- }
- rec.dptr[rec.dsize-1] = 0;
- p = strstr(rec.dptr, entry);
- if (p != NULL) {
- q = p + strlen(entry);
- l = strlen(q) + 1;
- memmove(p, q, l);
- rec.dsize = p - rec.dptr + l;
- if (tdb_store(pppdb, key, rec, TDB_REPLACE))
- error("couldn't update bundle link list (removal)");
- }
- free(rec.dptr);
-}
-
-static void iterate_bundle_links(void (*func)(char *))
-{
- TDB_DATA key, rec, pp;
- char *p, *q;
-
- key.dptr = blinks_id;
- key.dsize = strlen(blinks_id);
- rec = tdb_fetch(pppdb, key);
- if (rec.dptr == NULL || rec.dsize <= 0) {
- error("bundle link list not found (iterating list)");
- if (rec.dptr != NULL)
- free(rec.dptr);
- return;
- }
- p = rec.dptr;
- p[rec.dsize-1] = 0;
- while ((q = strchr(p, ';')) != NULL) {
- *q = 0;
- key.dptr = p;
- key.dsize = q - p;
- pp = tdb_fetch(pppdb, key);
- if (pp.dptr != NULL && pp.dsize > 0) {
- pp.dptr[pp.dsize-1] = 0;
- func(pp.dptr);
- }
- if (pp.dptr != NULL)
- free(pp.dptr);
- p = q + 1;
- }
- free(rec.dptr);
-}
-
-static int
-parse_num(str, key, valp)
- char *str;
- const char *key;
- int *valp;
-{
- char *p, *endp;
- int i;
-
- p = strstr(str, key);
- if (p != 0) {
- p += strlen(key);
- i = strtol(p, &endp, 10);
- if (endp != p && (*endp == 0 || *endp == ';')) {
- *valp = i;
- return 1;
- }
- }
- return 0;
-}
-
-/*
- * Check whether the pppd identified by `key' still owns ppp unit `unit'.
- */
-static int
-owns_unit(key, unit)
- TDB_DATA key;
- int unit;
-{
- char ifkey[32];
- TDB_DATA kd, vd;
- int ret = 0;
-
- slprintf(ifkey, sizeof(ifkey), "IFNAME=ppp%d", unit);
- kd.dptr = ifkey;
- kd.dsize = strlen(ifkey);
- vd = tdb_fetch(pppdb, kd);
- if (vd.dptr != NULL) {
- ret = vd.dsize == key.dsize
- && memcmp(vd.dptr, key.dptr, vd.dsize) == 0;
- free(vd.dptr);
- }
- return ret;
-}
-
-static int
-get_default_epdisc(ep)
- struct epdisc *ep;
-{
- char *p;
- struct hostent *hp;
- u_int32_t addr;
-
- /* First try for an ethernet MAC address */
- p = get_first_ethernet();
- if (p != 0 && get_if_hwaddr(ep->value, p) >= 0) {
- ep->class = EPD_MAC;
- ep->length = 6;
- return 1;
- }
-
- /* see if our hostname corresponds to a reasonable IP address */
- hp = gethostbyname(hostname);
- if (hp != NULL) {
- addr = *(u_int32_t *)hp->h_addr;
- if (!bad_ip_adrs(addr)) {
- addr = ntohl(addr);
- if (!LOCAL_IP_ADDR(addr)) {
- ep->class = EPD_IP;
- set_ip_epdisc(ep, addr);
- return 1;
- }
- }
- }
-
- return 0;
-}
-
-/*
- * epdisc_to_str - make a printable string from an endpoint discriminator.
- */
-
-static char *endp_class_names[] = {
- "null", "local", "IP", "MAC", "magic", "phone"
-};
-
-char *
-epdisc_to_str(ep)
- struct epdisc *ep;
-{
- static char str[MAX_ENDP_LEN*3+8];
- u_char *p = ep->value;
- int i, mask = 0;
- char *q, c, c2;
-
- if (ep->class == EPD_NULL && ep->length == 0)
- return "null";
- if (ep->class == EPD_IP && ep->length == 4) {
- u_int32_t addr;
-
- GETLONG(addr, p);
- slprintf(str, sizeof(str), "IP:%I", htonl(addr));
- return str;
- }
-
- c = ':';
- c2 = '.';
- if (ep->class == EPD_MAC && ep->length == 6)
- c2 = ':';
- else if (ep->class == EPD_MAGIC && (ep->length % 4) == 0)
- mask = 3;
- q = str;
- if (ep->class <= EPD_PHONENUM)
- q += slprintf(q, sizeof(str)-1, "%s",
- endp_class_names[ep->class]);
- else
- q += slprintf(q, sizeof(str)-1, "%d", ep->class);
- c = ':';
- for (i = 0; i < ep->length && i < MAX_ENDP_LEN; ++i) {
- if ((i & mask) == 0) {
- *q++ = c;
- c = c2;
- }
- q += slprintf(q, str + sizeof(str) - q, "%.2x", ep->value[i]);
- }
- return str;
-}
-
-static int hexc_val(int c)
-{
- if (c >= 'a')
- return c - 'a' + 10;
- if (c >= 'A')
- return c - 'A' + 10;
- return c - '0';
-}
-
-int
-str_to_epdisc(ep, str)
- struct epdisc *ep;
- char *str;
-{
- int i, l;
- char *p, *endp;
-
- for (i = EPD_NULL; i <= EPD_PHONENUM; ++i) {
- int sl = strlen(endp_class_names[i]);
- if (strncasecmp(str, endp_class_names[i], sl) == 0) {
- str += sl;
- break;
- }
- }
- if (i > EPD_PHONENUM) {
- /* not a class name, try a decimal class number */
- i = strtol(str, &endp, 10);
- if (endp == str)
- return 0; /* can't parse class number */
- str = endp;
- }
- ep->class = i;
- if (*str == 0) {
- ep->length = 0;
- return 1;
- }
- if (*str != ':' && *str != '.')
- return 0;
- ++str;
-
- if (i == EPD_IP) {
- u_int32_t addr;
- i = parse_dotted_ip(str, &addr);
- if (i == 0 || str[i] != 0)
- return 0;
- set_ip_epdisc(ep, addr);
- return 1;
- }
- if (i == EPD_MAC && get_if_hwaddr(ep->value, str) >= 0) {
- ep->length = 6;
- return 1;
- }
-
- p = str;
- for (l = 0; l < MAX_ENDP_LEN; ++l) {
- if (*str == 0)
- break;
- if (p <= str)
- for (p = str; isxdigit(*p); ++p)
- ;
- i = p - str;
- if (i == 0)
- return 0;
- ep->value[l] = hexc_val(*str++);
- if ((i & 1) == 0)
- ep->value[l] = (ep->value[l] << 4) + hexc_val(*str++);
- if (*str == ':' || *str == '.')
- ++str;
- }
- if (*str != 0 || (ep->class == EPD_MAC && l != 6))
- return 0;
- ep->length = l;
- return 1;
-}
-
diff --git a/pppd/spinlock.c b/pppd/spinlock.c
deleted file mode 100644
index 4df7e47..0000000
--- a/pppd/spinlock.c
+++ /dev/null
@@ -1,473 +0,0 @@
-/*
- Unix SMB/CIFS implementation.
-
- trivial database library
-
- Copyright (C) Anton Blanchard 2001
-
- ** NOTE! The following LGPL license applies to the tdb
- ** library. This does NOT imply that all of Samba is released
- ** under the LGPL
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-*/
-#include <stdlib.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <string.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <sys/stat.h>
-#include <time.h>
-#include <signal.h>
-#include "tdb.h"
-#include "spinlock.h"
-
-#define DEBUG
-
-#ifdef USE_SPINLOCKS
-
-/*
- * ARCH SPECIFIC
- */
-
-#if defined(SPARC_SPINLOCKS)
-
-static inline int __spin_trylock(spinlock_t *lock)
-{
- unsigned int result;
-
- asm volatile("ldstub [%1], %0"
- : "=r" (result)
- : "r" (lock)
- : "memory");
-
- return (result == 0) ? 0 : EBUSY;
-}
-
-static inline void __spin_unlock(spinlock_t *lock)
-{
- asm volatile("":::"memory");
- *lock = 0;
-}
-
-static inline void __spin_lock_init(spinlock_t *lock)
-{
- *lock = 0;
-}
-
-static inline int __spin_is_locked(spinlock_t *lock)
-{
- return (*lock != 0);
-}
-
-#elif defined(POWERPC_SPINLOCKS)
-
-static inline int __spin_trylock(spinlock_t *lock)
-{
- unsigned int result;
-
- __asm__ __volatile__(
-"1: lwarx %0,0,%1\n\
- cmpwi 0,%0,0\n\
- li %0,0\n\
- bne- 2f\n\
- li %0,1\n\
- stwcx. %0,0,%1\n\
- bne- 1b\n\
- isync\n\
-2:" : "=&r"(result)
- : "r"(lock)
- : "cr0", "memory");
-
- return (result == 1) ? 0 : EBUSY;
-}
-
-static inline void __spin_unlock(spinlock_t *lock)
-{
- asm volatile("eieio":::"memory");
- *lock = 0;
-}
-
-static inline void __spin_lock_init(spinlock_t *lock)
-{
- *lock = 0;
-}
-
-static inline int __spin_is_locked(spinlock_t *lock)
-{
- return (*lock != 0);
-}
-
-#elif defined(INTEL_SPINLOCKS)
-
-static inline int __spin_trylock(spinlock_t *lock)
-{
- int oldval;
-
- asm volatile("xchgl %0,%1"
- : "=r" (oldval), "=m" (*lock)
- : "0" (0)
- : "memory");
-
- return oldval > 0 ? 0 : EBUSY;
-}
-
-static inline void __spin_unlock(spinlock_t *lock)
-{
- asm volatile("":::"memory");
- *lock = 1;
-}
-
-static inline void __spin_lock_init(spinlock_t *lock)
-{
- *lock = 1;
-}
-
-static inline int __spin_is_locked(spinlock_t *lock)
-{
- return (*lock != 1);
-}
-
-#elif defined(MIPS_SPINLOCKS) && defined(sgi) && (_COMPILER_VERSION >= 730)
-
-/* Implement spinlocks on IRIX using the MIPSPro atomic fetch operations. See
- * sync(3) for the details of the intrinsic operations.
- *
- * "sgi" and "_COMPILER_VERSION" are always defined by MIPSPro.
- */
-
-#ifdef STANDALONE
-
-/* MIPSPro 7.3 has "__inline" as an extension, but not "inline. */
-#define inline __inline
-
-#endif /* STANDALONE */
-
-/* Returns 0 if the lock is acquired, EBUSY otherwise. */
-static inline int __spin_trylock(spinlock_t *lock)
-{
- unsigned int val;
- val = __lock_test_and_set(lock, 1);
- return val == 0 ? 0 : EBUSY;
-}
-
-static inline void __spin_unlock(spinlock_t *lock)
-{
- __lock_release(lock);
-}
-
-static inline void __spin_lock_init(spinlock_t *lock)
-{
- __lock_release(lock);
-}
-
-/* Returns 1 if the lock is held, 0 otherwise. */
-static inline int __spin_is_locked(spinlock_t *lock)
-{
- unsigned int val;
- val = __add_and_fetch(lock, 0);
- return val;
-}
-
-#elif defined(MIPS_SPINLOCKS)
-
-static inline unsigned int load_linked(unsigned long addr)
-{
- unsigned int res;
-
- __asm__ __volatile__("ll\t%0,(%1)"
- : "=r" (res)
- : "r" (addr));
-
- return res;
-}
-
-static inline unsigned int store_conditional(unsigned long addr, unsigned int value)
-{
- unsigned int res;
-
- __asm__ __volatile__("sc\t%0,(%2)"
- : "=r" (res)
- : "0" (value), "r" (addr));
- return res;
-}
-
-static inline int __spin_trylock(spinlock_t *lock)
-{
- unsigned int mw;
-
- do {
- mw = load_linked(lock);
- if (mw)
- return EBUSY;
- } while (!store_conditional(lock, 1));
-
- asm volatile("":::"memory");
-
- return 0;
-}
-
-static inline void __spin_unlock(spinlock_t *lock)
-{
- asm volatile("":::"memory");
- *lock = 0;
-}
-
-static inline void __spin_lock_init(spinlock_t *lock)
-{
- *lock = 0;
-}
-
-static inline int __spin_is_locked(spinlock_t *lock)
-{
- return (*lock != 0);
-}
-
-#else
-#error Need to implement spinlock code in spinlock.c
-#endif
-
-/*
- * OS SPECIFIC
- */
-
-static void yield_cpu(void)
-{
- struct timespec tm;
-
-#ifdef USE_SCHED_YIELD
- sched_yield();
-#else
- /* Linux will busy loop for delays < 2ms on real time tasks */
- tm.tv_sec = 0;
- tm.tv_nsec = 2000000L + 1;
- nanosleep(&tm, NULL);
-#endif
-}
-
-static int this_is_smp(void)
-{
-#if defined(HAVE_SYSCONF) && defined(SYSCONF_SC_NPROC_ONLN)
- return (sysconf(_SC_NPROC_ONLN) > 1) ? 1 : 0;
-#else
- return 0;
-#endif
-}
-
-/*
- * GENERIC
- */
-
-static int smp_machine = 0;
-
-static inline void __spin_lock(spinlock_t *lock)
-{
- int ntries = 0;
-
- while(__spin_trylock(lock)) {
- while(__spin_is_locked(lock)) {
- if (smp_machine && ntries++ < MAX_BUSY_LOOPS)
- continue;
- yield_cpu();
- }
- }
-}
-
-static void __read_lock(tdb_rwlock_t *rwlock)
-{
- int ntries = 0;
-
- while(1) {
- __spin_lock(&rwlock->lock);
-
- if (!(rwlock->count & RWLOCK_BIAS)) {
- rwlock->count++;
- __spin_unlock(&rwlock->lock);
- return;
- }
-
- __spin_unlock(&rwlock->lock);
-
- while(rwlock->count & RWLOCK_BIAS) {
- if (smp_machine && ntries++ < MAX_BUSY_LOOPS)
- continue;
- yield_cpu();
- }
- }
-}
-
-static void __write_lock(tdb_rwlock_t *rwlock)
-{
- int ntries = 0;
-
- while(1) {
- __spin_lock(&rwlock->lock);
-
- if (rwlock->count == 0) {
- rwlock->count |= RWLOCK_BIAS;
- __spin_unlock(&rwlock->lock);
- return;
- }
-
- __spin_unlock(&rwlock->lock);
-
- while(rwlock->count != 0) {
- if (smp_machine && ntries++ < MAX_BUSY_LOOPS)
- continue;
- yield_cpu();
- }
- }
-}
-
-static void __write_unlock(tdb_rwlock_t *rwlock)
-{
- __spin_lock(&rwlock->lock);
-
-#ifdef DEBUG
- if (!(rwlock->count & RWLOCK_BIAS))
- fprintf(stderr, "bug: write_unlock\n");
-#endif
-
- rwlock->count &= ~RWLOCK_BIAS;
- __spin_unlock(&rwlock->lock);
-}
-
-static void __read_unlock(tdb_rwlock_t *rwlock)
-{
- __spin_lock(&rwlock->lock);
-
-#ifdef DEBUG
- if (!rwlock->count)
- fprintf(stderr, "bug: read_unlock\n");
-
- if (rwlock->count & RWLOCK_BIAS)
- fprintf(stderr, "bug: read_unlock\n");
-#endif
-
- rwlock->count--;
- __spin_unlock(&rwlock->lock);
-}
-
-/* TDB SPECIFIC */
-
-/* lock a list in the database. list -1 is the alloc list */
-int tdb_spinlock(TDB_CONTEXT *tdb, int list, int rw_type)
-{
- tdb_rwlock_t *rwlocks;
-
- if (!tdb->map_ptr) return -1;
- rwlocks = (tdb_rwlock_t *)((char *)tdb->map_ptr + tdb->header.rwlocks);
-
- switch(rw_type) {
- case F_RDLCK:
- __read_lock(&rwlocks[list+1]);
- break;
-
- case F_WRLCK:
- __write_lock(&rwlocks[list+1]);
- break;
-
- default:
- return TDB_ERRCODE(TDB_ERR_LOCK, -1);
- }
- return 0;
-}
-
-/* unlock the database. */
-int tdb_spinunlock(TDB_CONTEXT *tdb, int list, int rw_type)
-{
- tdb_rwlock_t *rwlocks;
-
- if (!tdb->map_ptr) return -1;
- rwlocks = (tdb_rwlock_t *)((char *)tdb->map_ptr + tdb->header.rwlocks);
-
- switch(rw_type) {
- case F_RDLCK:
- __read_unlock(&rwlocks[list+1]);
- break;
-
- case F_WRLCK:
- __write_unlock(&rwlocks[list+1]);
- break;
-
- default:
- return TDB_ERRCODE(TDB_ERR_LOCK, -1);
- }
-
- return 0;
-}
-
-int tdb_create_rwlocks(int fd, unsigned int hash_size)
-{
- unsigned size, i;
- tdb_rwlock_t *rwlocks;
-
- size = TDB_SPINLOCK_SIZE(hash_size);
- rwlocks = malloc(size);
- if (!rwlocks)
- return -1;
-
- for(i = 0; i < hash_size+1; i++) {
- __spin_lock_init(&rwlocks[i].lock);
- rwlocks[i].count = 0;
- }
-
- /* Write it out (appending to end) */
- if (write(fd, rwlocks, size) != size) {
- free(rwlocks);
- return -1;
- }
- smp_machine = this_is_smp();
- free(rwlocks);
- return 0;
-}
-
-int tdb_clear_spinlocks(TDB_CONTEXT *tdb)
-{
- tdb_rwlock_t *rwlocks;
- unsigned i;
-
- if (tdb->header.rwlocks == 0) return 0;
- if (!tdb->map_ptr) return -1;
-
- /* We're mmapped here */
- rwlocks = (tdb_rwlock_t *)((char *)tdb->map_ptr + tdb->header.rwlocks);
- for(i = 0; i < tdb->header.hash_size+1; i++) {
- __spin_lock_init(&rwlocks[i].lock);
- rwlocks[i].count = 0;
- }
- return 0;
-}
-#else
-int tdb_create_rwlocks(int fd, unsigned int hash_size) { return 0; }
-int tdb_spinlock(TDB_CONTEXT *tdb, int list, int rw_type) { return -1; }
-int tdb_spinunlock(TDB_CONTEXT *tdb, int list, int rw_type) { return -1; }
-
-/* Non-spinlock version: remove spinlock pointer */
-int tdb_clear_spinlocks(TDB_CONTEXT *tdb)
-{
- tdb_off off = (tdb_off)((char *)&tdb->header.rwlocks
- - (char *)&tdb->header);
-
- tdb->header.rwlocks = 0;
- if (lseek(tdb->fd, off, SEEK_SET) != off
- || write(tdb->fd, (void *)&tdb->header.rwlocks,
- sizeof(tdb->header.rwlocks))
- != sizeof(tdb->header.rwlocks))
- return -1;
- return 0;
-}
-#endif
diff --git a/pppd/spinlock.h b/pppd/spinlock.h
deleted file mode 100644
index 967fe37..0000000
--- a/pppd/spinlock.h
+++ /dev/null
@@ -1,59 +0,0 @@
-#ifndef __SPINLOCK_H__
-#define __SPINLOCK_H__
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include "tdb.h"
-
-#ifdef USE_SPINLOCKS
-
-#define RWLOCK_BIAS 0x1000UL
-
-/* OS SPECIFIC */
-#define MAX_BUSY_LOOPS 1000
-#undef USE_SCHED_YIELD
-
-/* ARCH SPECIFIC */
-/* We should make sure these are padded to a cache line */
-#if defined(SPARC_SPINLOCKS)
-typedef volatile char spinlock_t;
-#elif defined(POWERPC_SPINLOCKS)
-typedef volatile unsigned long spinlock_t;
-#elif defined(INTEL_SPINLOCKS)
-typedef volatile int spinlock_t;
-#elif defined(MIPS_SPINLOCKS)
-typedef volatile unsigned long spinlock_t;
-#else
-#error Need to implement spinlock code in spinlock.h
-#endif
-
-typedef struct {
- spinlock_t lock;
- volatile int count;
-} tdb_rwlock_t;
-
-int tdb_spinlock(TDB_CONTEXT *tdb, int list, int rw_type);
-int tdb_spinunlock(TDB_CONTEXT *tdb, int list, int rw_type);
-int tdb_create_rwlocks(int fd, unsigned int hash_size);
-int tdb_clear_spinlocks(TDB_CONTEXT *tdb);
-
-#define TDB_SPINLOCK_SIZE(hash_size) (((hash_size) + 1) * sizeof(tdb_rwlock_t))
-
-#else /* !USE_SPINLOCKS */
-#if 0
-#define tdb_create_rwlocks(fd, hash_size) 0
-#define tdb_spinlock(tdb, list, rw_type) (-1)
-#define tdb_spinunlock(tdb, list, rw_type) (-1)
-#else
-int tdb_spinlock(TDB_CONTEXT *tdb, int list, int rw_type);
-int tdb_spinunlock(TDB_CONTEXT *tdb, int list, int rw_type);
-int tdb_create_rwlocks(int fd, unsigned int hash_size);
-#endif
-int tdb_clear_spinlocks(TDB_CONTEXT *tdb);
-#define TDB_SPINLOCK_SIZE(hash_size) 0
-
-#endif
-
-#endif
diff --git a/pppd/tdb.c b/pppd/tdb.c
deleted file mode 100644
index bdc5828..0000000
--- a/pppd/tdb.c
+++ /dev/null
@@ -1,2009 +0,0 @@
- /*
- Unix SMB/CIFS implementation.
-
- trivial database library
-
- Copyright (C) Andrew Tridgell 1999-2004
- Copyright (C) Paul `Rusty' Russell 2000
- Copyright (C) Jeremy Allison 2000-2003
-
- ** NOTE! The following LGPL license applies to the tdb
- ** library. This does NOT imply that all of Samba is released
- ** under the LGPL
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-*/
-
-
-/* NOTE: If you use tdbs under valgrind, and in particular if you run
- * tdbtorture, you may get spurious "uninitialized value" warnings. I
- * think this is because valgrind doesn't understand that the mmap'd
- * area may be written to by other processes. Memory can, from the
- * point of view of the grinded process, spontaneously become
- * initialized.
- *
- * I can think of a few solutions. [mbp 20030311]
- *
- * 1 - Write suppressions for Valgrind so that it doesn't complain
- * about this. Probably the most reasonable but people need to
- * remember to use them.
- *
- * 2 - Use IO not mmap when running under valgrind. Not so nice.
- *
- * 3 - Use the special valgrind macros to mark memory as valid at the
- * right time. Probably too hard -- the process just doesn't know.
- */
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <string.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <signal.h>
-#include "tdb.h"
-#include "spinlock.h"
-
-#define TDB_MAGIC_FOOD "TDB file\n"
-#define TDB_VERSION (0x26011967 + 6)
-#define TDB_MAGIC (0x26011999U)
-#define TDB_FREE_MAGIC (~TDB_MAGIC)
-#define TDB_DEAD_MAGIC (0xFEE1DEAD)
-#define TDB_ALIGNMENT 4
-#define MIN_REC_SIZE (2*sizeof(struct list_struct) + TDB_ALIGNMENT)
-#define DEFAULT_HASH_SIZE 131
-#define TDB_PAGE_SIZE 0x2000
-#define FREELIST_TOP (sizeof(struct tdb_header))
-#define TDB_ALIGN(x,a) (((x) + (a)-1) & ~((a)-1))
-#define TDB_BYTEREV(x) (((((x)&0xff)<<24)|((x)&0xFF00)<<8)|(((x)>>8)&0xFF00)|((x)>>24))
-#define TDB_DEAD(r) ((r)->magic == TDB_DEAD_MAGIC)
-#define TDB_BAD_MAGIC(r) ((r)->magic != TDB_MAGIC && !TDB_DEAD(r))
-#define TDB_HASH_TOP(hash) (FREELIST_TOP + (BUCKET(hash)+1)*sizeof(tdb_off))
-#define TDB_DATA_START(hash_size) (TDB_HASH_TOP(hash_size-1) + TDB_SPINLOCK_SIZE(hash_size))
-
-
-/* NB assumes there is a local variable called "tdb" that is the
- * current context, also takes doubly-parenthesized print-style
- * argument. */
-#define TDB_LOG(x) (tdb->log_fn?((tdb->log_fn x),0) : 0)
-
-/* lock offsets */
-#define GLOBAL_LOCK 0
-#define ACTIVE_LOCK 4
-
-#ifndef MAP_FILE
-#define MAP_FILE 0
-#endif
-
-#ifndef MAP_FAILED
-#define MAP_FAILED ((void *)-1)
-#endif
-
-/* free memory if the pointer is valid and zero the pointer */
-#ifndef SAFE_FREE
-#define SAFE_FREE(x) do { if ((x) != NULL) {free((x)); (x)=NULL;} } while(0)
-#endif
-
-#define BUCKET(hash) ((hash) % tdb->header.hash_size)
-TDB_DATA tdb_null;
-
-/* all contexts, to ensure no double-opens (fcntl locks don't nest!) */
-static TDB_CONTEXT *tdbs = NULL;
-
-static int tdb_munmap(TDB_CONTEXT *tdb)
-{
- if (tdb->flags & TDB_INTERNAL)
- return 0;
-
-#ifdef HAVE_MMAP
- if (tdb->map_ptr) {
- int ret = munmap(tdb->map_ptr, tdb->map_size);
- if (ret != 0)
- return ret;
- }
-#endif
- tdb->map_ptr = NULL;
- return 0;
-}
-
-static void tdb_mmap(TDB_CONTEXT *tdb)
-{
- if (tdb->flags & TDB_INTERNAL)
- return;
-
-#ifdef HAVE_MMAP
- if (!(tdb->flags & TDB_NOMMAP)) {
- tdb->map_ptr = mmap(NULL, tdb->map_size,
- PROT_READ|(tdb->read_only? 0:PROT_WRITE),
- MAP_SHARED|MAP_FILE, tdb->fd, 0);
-
- /*
- * NB. When mmap fails it returns MAP_FAILED *NOT* NULL !!!!
- */
-
- if (tdb->map_ptr == MAP_FAILED) {
- tdb->map_ptr = NULL;
- TDB_LOG((tdb, 2, "tdb_mmap failed for size %d (%s)\n",
- tdb->map_size, strerror(errno)));
- }
- } else {
- tdb->map_ptr = NULL;
- }
-#else
- tdb->map_ptr = NULL;
-#endif
-}
-
-/* Endian conversion: we only ever deal with 4 byte quantities */
-static void *convert(void *buf, u32 size)
-{
- u32 i, *p = buf;
- for (i = 0; i < size / 4; i++)
- p[i] = TDB_BYTEREV(p[i]);
- return buf;
-}
-#define DOCONV() (tdb->flags & TDB_CONVERT)
-#define CONVERT(x) (DOCONV() ? convert(&x, sizeof(x)) : &x)
-
-/* the body of the database is made of one list_struct for the free space
- plus a separate data list for each hash value */
-struct list_struct {
- tdb_off next; /* offset of the next record in the list */
- tdb_len rec_len; /* total byte length of record */
- tdb_len key_len; /* byte length of key */
- tdb_len data_len; /* byte length of data */
- u32 full_hash; /* the full 32 bit hash of the key */
- u32 magic; /* try to catch errors */
- /* the following union is implied:
- union {
- char record[rec_len];
- struct {
- char key[key_len];
- char data[data_len];
- }
- u32 totalsize; (tailer)
- }
- */
-};
-
-/***************************************************************
- Allow a caller to set a "alarm" flag that tdb can check to abort
- a blocking lock on SIGALRM.
-***************************************************************/
-
-static sig_atomic_t *palarm_fired;
-
-void tdb_set_lock_alarm(sig_atomic_t *palarm)
-{
- palarm_fired = palarm;
-}
-
-/* a byte range locking function - return 0 on success
- this functions locks/unlocks 1 byte at the specified offset.
-
- On error, errno is also set so that errors are passed back properly
- through tdb_open(). */
-static int tdb_brlock(TDB_CONTEXT *tdb, tdb_off offset,
- int rw_type, int lck_type, int probe)
-{
- struct flock fl;
- int ret;
-
- if (tdb->flags & TDB_NOLOCK)
- return 0;
- if ((rw_type == F_WRLCK) && (tdb->read_only)) {
- errno = EACCES;
- return -1;
- }
-
- fl.l_type = rw_type;
- fl.l_whence = SEEK_SET;
- fl.l_start = offset;
- fl.l_len = 1;
- fl.l_pid = 0;
-
- do {
- ret = fcntl(tdb->fd,lck_type,&fl);
- if (ret == -1 && errno == EINTR && palarm_fired && *palarm_fired)
- break;
- } while (ret == -1 && errno == EINTR);
-
- if (ret == -1) {
- if (!probe && lck_type != F_SETLK) {
- /* Ensure error code is set for log fun to examine. */
- if (errno == EINTR && palarm_fired && *palarm_fired)
- tdb->ecode = TDB_ERR_LOCK_TIMEOUT;
- else
- tdb->ecode = TDB_ERR_LOCK;
- TDB_LOG((tdb, 5,"tdb_brlock failed (fd=%d) at offset %d rw_type=%d lck_type=%d\n",
- tdb->fd, offset, rw_type, lck_type));
- }
- /* Was it an alarm timeout ? */
- if (errno == EINTR && palarm_fired && *palarm_fired) {
- TDB_LOG((tdb, 5, "tdb_brlock timed out (fd=%d) at offset %d rw_type=%d lck_type=%d\n",
- tdb->fd, offset, rw_type, lck_type));
- return TDB_ERRCODE(TDB_ERR_LOCK_TIMEOUT, -1);
- }
- /* Otherwise - generic lock error. errno set by fcntl.
- * EAGAIN is an expected return from non-blocking
- * locks. */
- if (errno != EAGAIN) {
- TDB_LOG((tdb, 5, "tdb_brlock failed (fd=%d) at offset %d rw_type=%d lck_type=%d: %s\n",
- tdb->fd, offset, rw_type, lck_type,
- strerror(errno)));
- }
- return TDB_ERRCODE(TDB_ERR_LOCK, -1);
- }
- return 0;
-}
-
-/* lock a list in the database. list -1 is the alloc list */
-static int tdb_lock(TDB_CONTEXT *tdb, int list, int ltype)
-{
- if (list < -1 || list >= (int)tdb->header.hash_size) {
- TDB_LOG((tdb, 0,"tdb_lock: invalid list %d for ltype=%d\n",
- list, ltype));
- return -1;
- }
- if (tdb->flags & TDB_NOLOCK)
- return 0;
-
- /* Since fcntl locks don't nest, we do a lock for the first one,
- and simply bump the count for future ones */
- if (tdb->locked[list+1].count == 0) {
- if (!tdb->read_only && tdb->header.rwlocks) {
- if (tdb_spinlock(tdb, list, ltype)) {
- TDB_LOG((tdb, 0, "tdb_lock spinlock failed on list %d ltype=%d\n",
- list, ltype));
- return -1;
- }
- } else if (tdb_brlock(tdb,FREELIST_TOP+4*list,ltype,F_SETLKW, 0)) {
- TDB_LOG((tdb, 0,"tdb_lock failed on list %d ltype=%d (%s)\n",
- list, ltype, strerror(errno)));
- return -1;
- }
- tdb->locked[list+1].ltype = ltype;
- }
- tdb->locked[list+1].count++;
- return 0;
-}
-
-/* unlock the database: returns void because it's too late for errors. */
- /* changed to return int it may be interesting to know there
- has been an error --simo */
-static int tdb_unlock(TDB_CONTEXT *tdb, int list, int ltype)
-{
- int ret = -1;
-
- if (tdb->flags & TDB_NOLOCK)
- return 0;
-
- /* Sanity checks */
- if (list < -1 || list >= (int)tdb->header.hash_size) {
- TDB_LOG((tdb, 0, "tdb_unlock: list %d invalid (%d)\n", list, tdb->header.hash_size));
- return ret;
- }
-
- if (tdb->locked[list+1].count==0) {
- TDB_LOG((tdb, 0, "tdb_unlock: count is 0\n"));
- return ret;
- }
-
- if (tdb->locked[list+1].count == 1) {
- /* Down to last nested lock: unlock underneath */
- if (!tdb->read_only && tdb->header.rwlocks) {
- ret = tdb_spinunlock(tdb, list, ltype);
- } else {
- ret = tdb_brlock(tdb, FREELIST_TOP+4*list, F_UNLCK, F_SETLKW, 0);
- }
- } else {
- ret = 0;
- }
- tdb->locked[list+1].count--;
-
- if (ret)
- TDB_LOG((tdb, 0,"tdb_unlock: An error occurred unlocking!\n"));
- return ret;
-}
-
-/* check for an out of bounds access - if it is out of bounds then
- see if the database has been expanded by someone else and expand
- if necessary
- note that "len" is the minimum length needed for the db
-*/
-static int tdb_oob(TDB_CONTEXT *tdb, tdb_off len, int probe)
-{
- struct stat st;
- if (len <= tdb->map_size)
- return 0;
- if (tdb->flags & TDB_INTERNAL) {
- if (!probe) {
- /* Ensure ecode is set for log fn. */
- tdb->ecode = TDB_ERR_IO;
- TDB_LOG((tdb, 0,"tdb_oob len %d beyond internal malloc size %d\n",
- (int)len, (int)tdb->map_size));
- }
- return TDB_ERRCODE(TDB_ERR_IO, -1);
- }
-
- if (fstat(tdb->fd, &st) == -1)
- return TDB_ERRCODE(TDB_ERR_IO, -1);
-
- if (st.st_size < (size_t)len) {
- if (!probe) {
- /* Ensure ecode is set for log fn. */
- tdb->ecode = TDB_ERR_IO;
- TDB_LOG((tdb, 0,"tdb_oob len %d beyond eof at %d\n",
- (int)len, (int)st.st_size));
- }
- return TDB_ERRCODE(TDB_ERR_IO, -1);
- }
-
- /* Unmap, update size, remap */
- if (tdb_munmap(tdb) == -1)
- return TDB_ERRCODE(TDB_ERR_IO, -1);
- tdb->map_size = st.st_size;
- tdb_mmap(tdb);
- return 0;
-}
-
-/* write a lump of data at a specified offset */
-static int tdb_write(TDB_CONTEXT *tdb, tdb_off off, void *buf, tdb_len len)
-{
- if (tdb_oob(tdb, off + len, 0) != 0)
- return -1;
-
- if (tdb->map_ptr)
- memcpy(off + (char *)tdb->map_ptr, buf, len);
-#ifdef HAVE_PWRITE
- else if (pwrite(tdb->fd, buf, len, off) != (ssize_t)len) {
-#else
- else if (lseek(tdb->fd, off, SEEK_SET) != off
- || write(tdb->fd, buf, len) != (ssize_t)len) {
-#endif
- /* Ensure ecode is set for log fn. */
- tdb->ecode = TDB_ERR_IO;
- TDB_LOG((tdb, 0,"tdb_write failed at %d len=%d (%s)\n",
- off, len, strerror(errno)));
- return TDB_ERRCODE(TDB_ERR_IO, -1);
- }
- return 0;
-}
-
-/* read a lump of data at a specified offset, maybe convert */
-static int tdb_read(TDB_CONTEXT *tdb,tdb_off off,void *buf,tdb_len len,int cv)
-{
- if (tdb_oob(tdb, off + len, 0) != 0)
- return -1;
-
- if (tdb->map_ptr)
- memcpy(buf, off + (char *)tdb->map_ptr, len);
-#ifdef HAVE_PREAD
- else if (pread(tdb->fd, buf, len, off) != (ssize_t)len) {
-#else
- else if (lseek(tdb->fd, off, SEEK_SET) != off
- || read(tdb->fd, buf, len) != (ssize_t)len) {
-#endif
- /* Ensure ecode is set for log fn. */
- tdb->ecode = TDB_ERR_IO;
- TDB_LOG((tdb, 0,"tdb_read failed at %d len=%d (%s)\n",
- off, len, strerror(errno)));
- return TDB_ERRCODE(TDB_ERR_IO, -1);
- }
- if (cv)
- convert(buf, len);
- return 0;
-}
-
-/* read a lump of data, allocating the space for it */
-static char *tdb_alloc_read(TDB_CONTEXT *tdb, tdb_off offset, tdb_len len)
-{
- char *buf;
-
- if (!(buf = malloc(len))) {
- /* Ensure ecode is set for log fn. */
- tdb->ecode = TDB_ERR_OOM;
- TDB_LOG((tdb, 0,"tdb_alloc_read malloc failed len=%d (%s)\n",
- len, strerror(errno)));
- return TDB_ERRCODE(TDB_ERR_OOM, buf);
- }
- if (tdb_read(tdb, offset, buf, len, 0) == -1) {
- SAFE_FREE(buf);
- return NULL;
- }
- return buf;
-}
-
-/* read/write a tdb_off */
-static int ofs_read(TDB_CONTEXT *tdb, tdb_off offset, tdb_off *d)
-{
- return tdb_read(tdb, offset, (char*)d, sizeof(*d), DOCONV());
-}
-static int ofs_write(TDB_CONTEXT *tdb, tdb_off offset, tdb_off *d)
-{
- tdb_off off = *d;
- return tdb_write(tdb, offset, CONVERT(off), sizeof(*d));
-}
-
-/* read/write a record */
-static int rec_read(TDB_CONTEXT *tdb, tdb_off offset, struct list_struct *rec)
-{
- if (tdb_read(tdb, offset, rec, sizeof(*rec),DOCONV()) == -1)
- return -1;
- if (TDB_BAD_MAGIC(rec)) {
- /* Ensure ecode is set for log fn. */
- tdb->ecode = TDB_ERR_CORRUPT;
- TDB_LOG((tdb, 0,"rec_read bad magic 0x%x at offset=%d\n", rec->magic, offset));
- return TDB_ERRCODE(TDB_ERR_CORRUPT, -1);
- }
- return tdb_oob(tdb, rec->next+sizeof(*rec), 0);
-}
-static int rec_write(TDB_CONTEXT *tdb, tdb_off offset, struct list_struct *rec)
-{
- struct list_struct r = *rec;
- return tdb_write(tdb, offset, CONVERT(r), sizeof(r));
-}
-
-/* read a freelist record and check for simple errors */
-static int rec_free_read(TDB_CONTEXT *tdb, tdb_off off, struct list_struct *rec)
-{
- if (tdb_read(tdb, off, rec, sizeof(*rec),DOCONV()) == -1)
- return -1;
-
- if (rec->magic == TDB_MAGIC) {
- /* this happens when a app is showdown while deleting a record - we should
- not completely fail when this happens */
- TDB_LOG((tdb, 0,"rec_free_read non-free magic 0x%x at offset=%d - fixing\n",
- rec->magic, off));
- rec->magic = TDB_FREE_MAGIC;
- if (tdb_write(tdb, off, rec, sizeof(*rec)) == -1)
- return -1;
- }
-
- if (rec->magic != TDB_FREE_MAGIC) {
- /* Ensure ecode is set for log fn. */
- tdb->ecode = TDB_ERR_CORRUPT;
- TDB_LOG((tdb, 0,"rec_free_read bad magic 0x%x at offset=%d\n",
- rec->magic, off));
- return TDB_ERRCODE(TDB_ERR_CORRUPT, -1);
- }
- if (tdb_oob(tdb, rec->next+sizeof(*rec), 0) != 0)
- return -1;
- return 0;
-}
-
-/* update a record tailer (must hold allocation lock) */
-static int update_tailer(TDB_CONTEXT *tdb, tdb_off offset,
- const struct list_struct *rec)
-{
- tdb_off totalsize;
-
- /* Offset of tailer from record header */
- totalsize = sizeof(*rec) + rec->rec_len;
- return ofs_write(tdb, offset + totalsize - sizeof(tdb_off),
- &totalsize);
-}
-
-static tdb_off tdb_dump_record(TDB_CONTEXT *tdb, tdb_off offset)
-{
- struct list_struct rec;
- tdb_off tailer_ofs, tailer;
-
- if (tdb_read(tdb, offset, (char *)&rec, sizeof(rec), DOCONV()) == -1) {
- printf("ERROR: failed to read record at %u\n", offset);
- return 0;
- }
-
- printf(" rec: offset=%u next=%d rec_len=%d key_len=%d data_len=%d full_hash=0x%x magic=0x%x\n",
- offset, rec.next, rec.rec_len, rec.key_len, rec.data_len, rec.full_hash, rec.magic);
-
- tailer_ofs = offset + sizeof(rec) + rec.rec_len - sizeof(tdb_off);
- if (ofs_read(tdb, tailer_ofs, &tailer) == -1) {
- printf("ERROR: failed to read tailer at %u\n", tailer_ofs);
- return rec.next;
- }
-
- if (tailer != rec.rec_len + sizeof(rec)) {
- printf("ERROR: tailer does not match record! tailer=%u totalsize=%u\n",
- (unsigned)tailer, (unsigned)(rec.rec_len + sizeof(rec)));
- }
- return rec.next;
-}
-
-static int tdb_dump_chain(TDB_CONTEXT *tdb, int i)
-{
- tdb_off rec_ptr, top;
-
- top = TDB_HASH_TOP(i);
-
- if (tdb_lock(tdb, i, F_WRLCK) != 0)
- return -1;
-
- if (ofs_read(tdb, top, &rec_ptr) == -1)
- return tdb_unlock(tdb, i, F_WRLCK);
-
- if (rec_ptr)
- printf("hash=%d\n", i);
-
- while (rec_ptr) {
- rec_ptr = tdb_dump_record(tdb, rec_ptr);
- }
-
- return tdb_unlock(tdb, i, F_WRLCK);
-}
-
-void tdb_dump_all(TDB_CONTEXT *tdb)
-{
- int i;
- for (i=0;i<tdb->header.hash_size;i++) {
- tdb_dump_chain(tdb, i);
- }
- printf("freelist:\n");
- tdb_dump_chain(tdb, -1);
-}
-
-int tdb_printfreelist(TDB_CONTEXT *tdb)
-{
- int ret;
- long total_free = 0;
- tdb_off offset, rec_ptr;
- struct list_struct rec;
-
- if ((ret = tdb_lock(tdb, -1, F_WRLCK)) != 0)
- return ret;
-
- offset = FREELIST_TOP;
-
- /* read in the freelist top */
- if (ofs_read(tdb, offset, &rec_ptr) == -1) {
- tdb_unlock(tdb, -1, F_WRLCK);
- return 0;
- }
-
- printf("freelist top=[0x%08x]\n", rec_ptr );
- while (rec_ptr) {
- if (tdb_read(tdb, rec_ptr, (char *)&rec, sizeof(rec), DOCONV()) == -1) {
- tdb_unlock(tdb, -1, F_WRLCK);
- return -1;
- }
-
- if (rec.magic != TDB_FREE_MAGIC) {
- printf("bad magic 0x%08x in free list\n", rec.magic);
- tdb_unlock(tdb, -1, F_WRLCK);
- return -1;
- }
-
- printf("entry offset=[0x%08x], rec.rec_len = [0x%08x (%d)]\n", rec.next, rec.rec_len, rec.rec_len );
- total_free += rec.rec_len;
-
- /* move to the next record */
- rec_ptr = rec.next;
- }
- printf("total rec_len = [0x%08x (%d)]\n", (int)total_free,
- (int)total_free);
-
- return tdb_unlock(tdb, -1, F_WRLCK);
-}
-
-/* Remove an element from the freelist. Must have alloc lock. */
-static int remove_from_freelist(TDB_CONTEXT *tdb, tdb_off off, tdb_off next)
-{
- tdb_off last_ptr, i;
-
- /* read in the freelist top */
- last_ptr = FREELIST_TOP;
- while (ofs_read(tdb, last_ptr, &i) != -1 && i != 0) {
- if (i == off) {
- /* We've found it! */
- return ofs_write(tdb, last_ptr, &next);
- }
- /* Follow chain (next offset is at start of record) */
- last_ptr = i;
- }
- TDB_LOG((tdb, 0,"remove_from_freelist: not on list at off=%d\n", off));
- return TDB_ERRCODE(TDB_ERR_CORRUPT, -1);
-}
-
-/* Add an element into the freelist. Merge adjacent records if
- neccessary. */
-static int tdb_free(TDB_CONTEXT *tdb, tdb_off offset, struct list_struct *rec)
-{
- tdb_off right, left;
-
- /* Allocation and tailer lock */
- if (tdb_lock(tdb, -1, F_WRLCK) != 0)
- return -1;
-
- /* set an initial tailer, so if we fail we don't leave a bogus record */
- if (update_tailer(tdb, offset, rec) != 0) {
- TDB_LOG((tdb, 0, "tdb_free: upfate_tailer failed!\n"));
- goto fail;
- }
-
- /* Look right first (I'm an Australian, dammit) */
- right = offset + sizeof(*rec) + rec->rec_len;
- if (right + sizeof(*rec) <= tdb->map_size) {
- struct list_struct r;
-
- if (tdb_read(tdb, right, &r, sizeof(r), DOCONV()) == -1) {
- TDB_LOG((tdb, 0, "tdb_free: right read failed at %u\n", right));
- goto left;
- }
-
- /* If it's free, expand to include it. */
- if (r.magic == TDB_FREE_MAGIC) {
- if (remove_from_freelist(tdb, right, r.next) == -1) {
- TDB_LOG((tdb, 0, "tdb_free: right free failed at %u\n", right));
- goto left;
- }
- rec->rec_len += sizeof(r) + r.rec_len;
- }
- }
-
-left:
- /* Look left */
- left = offset - sizeof(tdb_off);
- if (left > TDB_DATA_START(tdb->header.hash_size)) {
- struct list_struct l;
- tdb_off leftsize;
-
- /* Read in tailer and jump back to header */
- if (ofs_read(tdb, left, &leftsize) == -1) {
- TDB_LOG((tdb, 0, "tdb_free: left offset read failed at %u\n", left));
- goto update;
- }
- left = offset - leftsize;
-
- /* Now read in record */
- if (tdb_read(tdb, left, &l, sizeof(l), DOCONV()) == -1) {
- TDB_LOG((tdb, 0, "tdb_free: left read failed at %u (%u)\n", left, leftsize));
- goto update;
- }
-
- /* If it's free, expand to include it. */
- if (l.magic == TDB_FREE_MAGIC) {
- if (remove_from_freelist(tdb, left, l.next) == -1) {
- TDB_LOG((tdb, 0, "tdb_free: left free failed at %u\n", left));
- goto update;
- } else {
- offset = left;
- rec->rec_len += leftsize;
- }
- }
- }
-
-update:
- if (update_tailer(tdb, offset, rec) == -1) {
- TDB_LOG((tdb, 0, "tdb_free: update_tailer failed at %u\n", offset));
- goto fail;
- }
-
- /* Now, prepend to free list */
- rec->magic = TDB_FREE_MAGIC;
-
- if (ofs_read(tdb, FREELIST_TOP, &rec->next) == -1 ||
- rec_write(tdb, offset, rec) == -1 ||
- ofs_write(tdb, FREELIST_TOP, &offset) == -1) {
- TDB_LOG((tdb, 0, "tdb_free record write failed at offset=%d\n", offset));
- goto fail;
- }
-
- /* And we're done. */
- tdb_unlock(tdb, -1, F_WRLCK);
- return 0;
-
- fail:
- tdb_unlock(tdb, -1, F_WRLCK);
- return -1;
-}
-
-
-/* expand a file. we prefer to use ftruncate, as that is what posix
- says to use for mmap expansion */
-static int expand_file(TDB_CONTEXT *tdb, tdb_off size, tdb_off addition)
-{
- char buf[1024];
-#if HAVE_FTRUNCATE_EXTEND
- if (ftruncate(tdb->fd, size+addition) != 0) {
- TDB_LOG((tdb, 0, "expand_file ftruncate to %d failed (%s)\n",
- size+addition, strerror(errno)));
- return -1;
- }
-#else
- char b = 0;
-
-#ifdef HAVE_PWRITE
- if (pwrite(tdb->fd, &b, 1, (size+addition) - 1) != 1) {
-#else
- if (lseek(tdb->fd, (size+addition) - 1, SEEK_SET) != (size+addition) - 1 ||
- write(tdb->fd, &b, 1) != 1) {
-#endif
- TDB_LOG((tdb, 0, "expand_file to %d failed (%s)\n",
- size+addition, strerror(errno)));
- return -1;
- }
-#endif
-
- /* now fill the file with something. This ensures that the file isn't sparse, which would be
- very bad if we ran out of disk. This must be done with write, not via mmap */
- memset(buf, 0x42, sizeof(buf));
- while (addition) {
- int n = addition>sizeof(buf)?sizeof(buf):addition;
-#ifdef HAVE_PWRITE
- int ret = pwrite(tdb->fd, buf, n, size);
-#else
- int ret;
- if (lseek(tdb->fd, size, SEEK_SET) != size)
- return -1;
- ret = write(tdb->fd, buf, n);
-#endif
- if (ret != n) {
- TDB_LOG((tdb, 0, "expand_file write of %d failed (%s)\n",
- n, strerror(errno)));
- return -1;
- }
- addition -= n;
- size += n;
- }
- return 0;
-}
-
-
-/* expand the database at least size bytes by expanding the underlying
- file and doing the mmap again if necessary */
-static int tdb_expand(TDB_CONTEXT *tdb, tdb_off size)
-{
- struct list_struct rec;
- tdb_off offset;
-
- if (tdb_lock(tdb, -1, F_WRLCK) == -1) {
- TDB_LOG((tdb, 0, "lock failed in tdb_expand\n"));
- return -1;
- }
-
- /* must know about any previous expansions by another process */
- tdb_oob(tdb, tdb->map_size + 1, 1);
-
- /* always make room for at least 10 more records, and round
- the database up to a multiple of TDB_PAGE_SIZE */
- size = TDB_ALIGN(tdb->map_size + size*10, TDB_PAGE_SIZE) - tdb->map_size;
-
- if (!(tdb->flags & TDB_INTERNAL))
- tdb_munmap(tdb);
-
- /*
- * We must ensure the file is unmapped before doing this
- * to ensure consistency with systems like OpenBSD where
- * writes and mmaps are not consistent.
- */
-
- /* expand the file itself */
- if (!(tdb->flags & TDB_INTERNAL)) {
- if (expand_file(tdb, tdb->map_size, size) != 0)
- goto fail;
- }
-
- tdb->map_size += size;
-
- if (tdb->flags & TDB_INTERNAL)
- tdb->map_ptr = realloc(tdb->map_ptr, tdb->map_size);
- else {
- /*
- * We must ensure the file is remapped before adding the space
- * to ensure consistency with systems like OpenBSD where
- * writes and mmaps are not consistent.
- */
-
- /* We're ok if the mmap fails as we'll fallback to read/write */
- tdb_mmap(tdb);
- }
-
- /* form a new freelist record */
- memset(&rec,'\0',sizeof(rec));
- rec.rec_len = size - sizeof(rec);
-
- /* link it into the free list */
- offset = tdb->map_size - size;
- if (tdb_free(tdb, offset, &rec) == -1)
- goto fail;
-
- tdb_unlock(tdb, -1, F_WRLCK);
- return 0;
- fail:
- tdb_unlock(tdb, -1, F_WRLCK);
- return -1;
-}
-
-/* allocate some space from the free list. The offset returned points
- to a unconnected list_struct within the database with room for at
- least length bytes of total data
-
- 0 is returned if the space could not be allocated
- */
-static tdb_off tdb_allocate(TDB_CONTEXT *tdb, tdb_len length,
- struct list_struct *rec)
-{
- tdb_off rec_ptr, last_ptr, newrec_ptr;
- struct list_struct newrec;
-
- memset(&newrec, '\0', sizeof(newrec));
-
- if (tdb_lock(tdb, -1, F_WRLCK) == -1)
- return 0;
-
- /* Extra bytes required for tailer */
- length += sizeof(tdb_off);
-
- again:
- last_ptr = FREELIST_TOP;
-
- /* read in the freelist top */
- if (ofs_read(tdb, FREELIST_TOP, &rec_ptr) == -1)
- goto fail;
-
- /* keep looking until we find a freelist record big enough */
- while (rec_ptr) {
- if (rec_free_read(tdb, rec_ptr, rec) == -1)
- goto fail;
-
- if (rec->rec_len >= length) {
- /* found it - now possibly split it up */
- if (rec->rec_len > length + MIN_REC_SIZE) {
- /* Length of left piece */
- length = TDB_ALIGN(length, TDB_ALIGNMENT);
-
- /* Right piece to go on free list */
- newrec.rec_len = rec->rec_len
- - (sizeof(*rec) + length);
- newrec_ptr = rec_ptr + sizeof(*rec) + length;
-
- /* And left record is shortened */
- rec->rec_len = length;
- } else
- newrec_ptr = 0;
-
- /* Remove allocated record from the free list */
- if (ofs_write(tdb, last_ptr, &rec->next) == -1)
- goto fail;
-
- /* Update header: do this before we drop alloc
- lock, otherwise tdb_free() might try to
- merge with us, thinking we're free.
- (Thanks Jeremy Allison). */
- rec->magic = TDB_MAGIC;
- if (rec_write(tdb, rec_ptr, rec) == -1)
- goto fail;
-
- /* Did we create new block? */
- if (newrec_ptr) {
- /* Update allocated record tailer (we
- shortened it). */
- if (update_tailer(tdb, rec_ptr, rec) == -1)
- goto fail;
-
- /* Free new record */
- if (tdb_free(tdb, newrec_ptr, &newrec) == -1)
- goto fail;
- }
-
- /* all done - return the new record offset */
- tdb_unlock(tdb, -1, F_WRLCK);
- return rec_ptr;
- }
- /* move to the next record */
- last_ptr = rec_ptr;
- rec_ptr = rec->next;
- }
- /* we didn't find enough space. See if we can expand the
- database and if we can then try again */
- if (tdb_expand(tdb, length + sizeof(*rec)) == 0)
- goto again;
- fail:
- tdb_unlock(tdb, -1, F_WRLCK);
- return 0;
-}
-
-/* initialise a new database with a specified hash size */
-static int tdb_new_database(TDB_CONTEXT *tdb, int hash_size)
-{
- struct tdb_header *newdb;
- int size, ret = -1;
-
- /* We make it up in memory, then write it out if not internal */
- size = sizeof(struct tdb_header) + (hash_size+1)*sizeof(tdb_off);
- if (!(newdb = calloc(size, 1)))
- return TDB_ERRCODE(TDB_ERR_OOM, -1);
-
- /* Fill in the header */
- newdb->version = TDB_VERSION;
- newdb->hash_size = hash_size;
- if (tdb->flags & TDB_INTERNAL) {
- tdb->map_size = size;
- tdb->map_ptr = (char *)newdb;
- memcpy(&tdb->header, newdb, sizeof(tdb->header));
- /* Convert the `ondisk' version if asked. */
- CONVERT(*newdb);
- return 0;
- }
- if (lseek(tdb->fd, 0, SEEK_SET) == -1)
- goto fail;
-
- if (ftruncate(tdb->fd, 0) == -1)
- goto fail;
-
- /* This creates an endian-converted header, as if read from disk */
- CONVERT(*newdb);
- memcpy(&tdb->header, newdb, sizeof(tdb->header));
- /* Don't endian-convert the magic food! */
- memcpy(newdb->magic_food, TDB_MAGIC_FOOD, strlen(TDB_MAGIC_FOOD)+1);
- if (write(tdb->fd, newdb, size) != size)
- ret = -1;
- else
- ret = tdb_create_rwlocks(tdb->fd, hash_size);
-
- fail:
- SAFE_FREE(newdb);
- return ret;
-}
-
-/* Returns 0 on fail. On success, return offset of record, and fills
- in rec */
-static tdb_off tdb_find(TDB_CONTEXT *tdb, TDB_DATA key, u32 hash,
- struct list_struct *r)
-{
- tdb_off rec_ptr;
-
- /* read in the hash top */
- if (ofs_read(tdb, TDB_HASH_TOP(hash), &rec_ptr) == -1)
- return 0;
-
- /* keep looking until we find the right record */
- while (rec_ptr) {
- if (rec_read(tdb, rec_ptr, r) == -1)
- return 0;
-
- if (!TDB_DEAD(r) && hash==r->full_hash && key.dsize==r->key_len) {
- char *k;
- /* a very likely hit - read the key */
- k = tdb_alloc_read(tdb, rec_ptr + sizeof(*r),
- r->key_len);
- if (!k)
- return 0;
-
- if (memcmp(key.dptr, k, key.dsize) == 0) {
- SAFE_FREE(k);
- return rec_ptr;
- }
- SAFE_FREE(k);
- }
- rec_ptr = r->next;
- }
- return TDB_ERRCODE(TDB_ERR_NOEXIST, 0);
-}
-
-/* As tdb_find, but if you succeed, keep the lock */
-static tdb_off tdb_find_lock_hash(TDB_CONTEXT *tdb, TDB_DATA key, u32 hash, int locktype,
- struct list_struct *rec)
-{
- u32 rec_ptr;
-
- if (tdb_lock(tdb, BUCKET(hash), locktype) == -1)
- return 0;
- if (!(rec_ptr = tdb_find(tdb, key, hash, rec)))
- tdb_unlock(tdb, BUCKET(hash), locktype);
- return rec_ptr;
-}
-
-enum TDB_ERROR tdb_error(TDB_CONTEXT *tdb)
-{
- return tdb->ecode;
-}
-
-static struct tdb_errname {
- enum TDB_ERROR ecode; const char *estring;
-} emap[] = { {TDB_SUCCESS, "Success"},
- {TDB_ERR_CORRUPT, "Corrupt database"},
- {TDB_ERR_IO, "IO Error"},
- {TDB_ERR_LOCK, "Locking error"},
- {TDB_ERR_OOM, "Out of memory"},
- {TDB_ERR_EXISTS, "Record exists"},
- {TDB_ERR_NOLOCK, "Lock exists on other keys"},
- {TDB_ERR_NOEXIST, "Record does not exist"} };
-
-/* Error string for the last tdb error */
-const char *tdb_errorstr(TDB_CONTEXT *tdb)
-{
- u32 i;
- for (i = 0; i < sizeof(emap) / sizeof(struct tdb_errname); i++)
- if (tdb->ecode == emap[i].ecode)
- return emap[i].estring;
- return "Invalid error code";
-}
-
-/* update an entry in place - this only works if the new data size
- is <= the old data size and the key exists.
- on failure return -1.
-*/
-
-static int tdb_update_hash(TDB_CONTEXT *tdb, TDB_DATA key, u32 hash, TDB_DATA dbuf)
-{
- struct list_struct rec;
- tdb_off rec_ptr;
-
- /* find entry */
- if (!(rec_ptr = tdb_find(tdb, key, hash, &rec)))
- return -1;
-
- /* must be long enough key, data and tailer */
- if (rec.rec_len < key.dsize + dbuf.dsize + sizeof(tdb_off)) {
- tdb->ecode = TDB_SUCCESS; /* Not really an error */
- return -1;
- }
-
- if (tdb_write(tdb, rec_ptr + sizeof(rec) + rec.key_len,
- dbuf.dptr, dbuf.dsize) == -1)
- return -1;
-
- if (dbuf.dsize != rec.data_len) {
- /* update size */
- rec.data_len = dbuf.dsize;
- return rec_write(tdb, rec_ptr, &rec);
- }
-
- return 0;
-}
-
-/* find an entry in the database given a key */
-/* If an entry doesn't exist tdb_err will be set to
- * TDB_ERR_NOEXIST. If a key has no data attached
- * tdb_err will not be set. Both will return a
- * zero pptr and zero dsize.
- */
-
-TDB_DATA tdb_fetch(TDB_CONTEXT *tdb, TDB_DATA key)
-{
- tdb_off rec_ptr;
- struct list_struct rec;
- TDB_DATA ret;
- u32 hash;
-
- /* find which hash bucket it is in */
- hash = tdb->hash_fn(&key);
- if (!(rec_ptr = tdb_find_lock_hash(tdb,key,hash,F_RDLCK,&rec)))
- return tdb_null;
-
- if (rec.data_len)
- ret.dptr = tdb_alloc_read(tdb, rec_ptr + sizeof(rec) + rec.key_len,
- rec.data_len);
- else
- ret.dptr = NULL;
- ret.dsize = rec.data_len;
- tdb_unlock(tdb, BUCKET(rec.full_hash), F_RDLCK);
- return ret;
-}
-
-/* check if an entry in the database exists
-
- note that 1 is returned if the key is found and 0 is returned if not found
- this doesn't match the conventions in the rest of this module, but is
- compatible with gdbm
-*/
-static int tdb_exists_hash(TDB_CONTEXT *tdb, TDB_DATA key, u32 hash)
-{
- struct list_struct rec;
-
- if (tdb_find_lock_hash(tdb, key, hash, F_RDLCK, &rec) == 0)
- return 0;
- tdb_unlock(tdb, BUCKET(rec.full_hash), F_RDLCK);
- return 1;
-}
-
-int tdb_exists(TDB_CONTEXT *tdb, TDB_DATA key)
-{
- u32 hash = tdb->hash_fn(&key);
- return tdb_exists_hash(tdb, key, hash);
-}
-
-/* record lock stops delete underneath */
-static int lock_record(TDB_CONTEXT *tdb, tdb_off off)
-{
- return off ? tdb_brlock(tdb, off, F_RDLCK, F_SETLKW, 0) : 0;
-}
-/*
- Write locks override our own fcntl readlocks, so check it here.
- Note this is meant to be F_SETLK, *not* F_SETLKW, as it's not
- an error to fail to get the lock here.
-*/
-
-static int write_lock_record(TDB_CONTEXT *tdb, tdb_off off)
-{
- struct tdb_traverse_lock *i;
- for (i = &tdb->travlocks; i; i = i->next)
- if (i->off == off)
- return -1;
- return tdb_brlock(tdb, off, F_WRLCK, F_SETLK, 1);
-}
-
-/*
- Note this is meant to be F_SETLK, *not* F_SETLKW, as it's not
- an error to fail to get the lock here.
-*/
-
-static int write_unlock_record(TDB_CONTEXT *tdb, tdb_off off)
-{
- return tdb_brlock(tdb, off, F_UNLCK, F_SETLK, 0);
-}
-/* fcntl locks don't stack: avoid unlocking someone else's */
-static int unlock_record(TDB_CONTEXT *tdb, tdb_off off)
-{
- struct tdb_traverse_lock *i;
- u32 count = 0;
-
- if (off == 0)
- return 0;
- for (i = &tdb->travlocks; i; i = i->next)
- if (i->off == off)
- count++;
- return (count == 1 ? tdb_brlock(tdb, off, F_UNLCK, F_SETLKW, 0) : 0);
-}
-
-/* actually delete an entry in the database given the offset */
-static int do_delete(TDB_CONTEXT *tdb, tdb_off rec_ptr, struct list_struct*rec)
-{
- tdb_off last_ptr, i;
- struct list_struct lastrec;
-
- if (tdb->read_only) return -1;
-
- if (write_lock_record(tdb, rec_ptr) == -1) {
- /* Someone traversing here: mark it as dead */
- rec->magic = TDB_DEAD_MAGIC;
- return rec_write(tdb, rec_ptr, rec);
- }
- if (write_unlock_record(tdb, rec_ptr) != 0)
- return -1;
-
- /* find previous record in hash chain */
- if (ofs_read(tdb, TDB_HASH_TOP(rec->full_hash), &i) == -1)
- return -1;
- for (last_ptr = 0; i != rec_ptr; last_ptr = i, i = lastrec.next)
- if (rec_read(tdb, i, &lastrec) == -1)
- return -1;
-
- /* unlink it: next ptr is at start of record. */
- if (last_ptr == 0)
- last_ptr = TDB_HASH_TOP(rec->full_hash);
- if (ofs_write(tdb, last_ptr, &rec->next) == -1)
- return -1;
-
- /* recover the space */
- if (tdb_free(tdb, rec_ptr, rec) == -1)
- return -1;
- return 0;
-}
-
-/* Uses traverse lock: 0 = finish, -1 = error, other = record offset */
-static int tdb_next_lock(TDB_CONTEXT *tdb, struct tdb_traverse_lock *tlock,
- struct list_struct *rec)
-{
- int want_next = (tlock->off != 0);
-
- /* Lock each chain from the start one. */
- for (; tlock->hash < tdb->header.hash_size; tlock->hash++) {
- if (tdb_lock(tdb, tlock->hash, F_WRLCK) == -1)
- return -1;
-
- /* No previous record? Start at top of chain. */
- if (!tlock->off) {
- if (ofs_read(tdb, TDB_HASH_TOP(tlock->hash),
- &tlock->off) == -1)
- goto fail;
- } else {
- /* Otherwise unlock the previous record. */
- if (unlock_record(tdb, tlock->off) != 0)
- goto fail;
- }
-
- if (want_next) {
- /* We have offset of old record: grab next */
- if (rec_read(tdb, tlock->off, rec) == -1)
- goto fail;
- tlock->off = rec->next;
- }
-
- /* Iterate through chain */
- while( tlock->off) {
- tdb_off current;
- if (rec_read(tdb, tlock->off, rec) == -1)
- goto fail;
- if (!TDB_DEAD(rec)) {
- /* Woohoo: we found one! */
- if (lock_record(tdb, tlock->off) != 0)
- goto fail;
- return tlock->off;
- }
- /* Try to clean dead ones from old traverses */
- current = tlock->off;
- tlock->off = rec->next;
- if (!tdb->read_only &&
- do_delete(tdb, current, rec) != 0)
- goto fail;
- }
- tdb_unlock(tdb, tlock->hash, F_WRLCK);
- want_next = 0;
- }
- /* We finished iteration without finding anything */
- return TDB_ERRCODE(TDB_SUCCESS, 0);
-
- fail:
- tlock->off = 0;
- if (tdb_unlock(tdb, tlock->hash, F_WRLCK) != 0)
- TDB_LOG((tdb, 0, "tdb_next_lock: On error unlock failed!\n"));
- return -1;
-}
-
-/* traverse the entire database - calling fn(tdb, key, data) on each element.
- return -1 on error or the record count traversed
- if fn is NULL then it is not called
- a non-zero return value from fn() indicates that the traversal should stop
- */
-int tdb_traverse(TDB_CONTEXT *tdb, tdb_traverse_func fn, void *private)
-{
- TDB_DATA key, dbuf;
- struct list_struct rec;
- struct tdb_traverse_lock tl = { NULL, 0, 0 };
- int ret, count = 0;
-
- /* This was in the initializaton, above, but the IRIX compiler
- * did not like it. crh
- */
- tl.next = tdb->travlocks.next;
-
- /* fcntl locks don't stack: beware traverse inside traverse */
- tdb->travlocks.next = &tl;
-
- /* tdb_next_lock places locks on the record returned, and its chain */
- while ((ret = tdb_next_lock(tdb, &tl, &rec)) > 0) {
- count++;
- /* now read the full record */
- key.dptr = tdb_alloc_read(tdb, tl.off + sizeof(rec),
- rec.key_len + rec.data_len);
- if (!key.dptr) {
- ret = -1;
- if (tdb_unlock(tdb, tl.hash, F_WRLCK) != 0)
- goto out;
- if (unlock_record(tdb, tl.off) != 0)
- TDB_LOG((tdb, 0, "tdb_traverse: key.dptr == NULL and unlock_record failed!\n"));
- goto out;
- }
- key.dsize = rec.key_len;
- dbuf.dptr = key.dptr + rec.key_len;
- dbuf.dsize = rec.data_len;
-
- /* Drop chain lock, call out */
- if (tdb_unlock(tdb, tl.hash, F_WRLCK) != 0) {
- ret = -1;
- goto out;
- }
- if (fn && fn(tdb, key, dbuf, private)) {
- /* They want us to terminate traversal */
- ret = count;
- if (unlock_record(tdb, tl.off) != 0) {
- TDB_LOG((tdb, 0, "tdb_traverse: unlock_record failed!\n"));;
- ret = -1;
- }
- tdb->travlocks.next = tl.next;
- SAFE_FREE(key.dptr);
- return count;
- }
- SAFE_FREE(key.dptr);
- }
-out:
- tdb->travlocks.next = tl.next;
- if (ret < 0)
- return -1;
- else
- return count;
-}
-
-/* find the first entry in the database and return its key */
-TDB_DATA tdb_firstkey(TDB_CONTEXT *tdb)
-{
- TDB_DATA key;
- struct list_struct rec;
-
- /* release any old lock */
- if (unlock_record(tdb, tdb->travlocks.off) != 0)
- return tdb_null;
- tdb->travlocks.off = tdb->travlocks.hash = 0;
-
- if (tdb_next_lock(tdb, &tdb->travlocks, &rec) <= 0)
- return tdb_null;
- /* now read the key */
- key.dsize = rec.key_len;
- key.dptr =tdb_alloc_read(tdb,tdb->travlocks.off+sizeof(rec),key.dsize);
- if (tdb_unlock(tdb, BUCKET(tdb->travlocks.hash), F_WRLCK) != 0)
- TDB_LOG((tdb, 0, "tdb_firstkey: error occurred while tdb_unlocking!\n"));
- return key;
-}
-
-/* find the next entry in the database, returning its key */
-TDB_DATA tdb_nextkey(TDB_CONTEXT *tdb, TDB_DATA oldkey)
-{
- u32 oldhash;
- TDB_DATA key = tdb_null;
- struct list_struct rec;
- char *k = NULL;
-
- /* Is locked key the old key? If so, traverse will be reliable. */
- if (tdb->travlocks.off) {
- if (tdb_lock(tdb,tdb->travlocks.hash,F_WRLCK))
- return tdb_null;
- if (rec_read(tdb, tdb->travlocks.off, &rec) == -1
- || !(k = tdb_alloc_read(tdb,tdb->travlocks.off+sizeof(rec),
- rec.key_len))
- || memcmp(k, oldkey.dptr, oldkey.dsize) != 0) {
- /* No, it wasn't: unlock it and start from scratch */
- if (unlock_record(tdb, tdb->travlocks.off) != 0)
- return tdb_null;
- if (tdb_unlock(tdb, tdb->travlocks.hash, F_WRLCK) != 0)
- return tdb_null;
- tdb->travlocks.off = 0;
- }
-
- SAFE_FREE(k);
- }
-
- if (!tdb->travlocks.off) {
- /* No previous element: do normal find, and lock record */
- tdb->travlocks.off = tdb_find_lock_hash(tdb, oldkey, tdb->hash_fn(&oldkey), F_WRLCK, &rec);
- if (!tdb->travlocks.off)
- return tdb_null;
- tdb->travlocks.hash = BUCKET(rec.full_hash);
- if (lock_record(tdb, tdb->travlocks.off) != 0) {
- TDB_LOG((tdb, 0, "tdb_nextkey: lock_record failed (%s)!\n", strerror(errno)));
- return tdb_null;
- }
- }
- oldhash = tdb->travlocks.hash;
-
- /* Grab next record: locks chain and returned record,
- unlocks old record */
- if (tdb_next_lock(tdb, &tdb->travlocks, &rec) > 0) {
- key.dsize = rec.key_len;
- key.dptr = tdb_alloc_read(tdb, tdb->travlocks.off+sizeof(rec),
- key.dsize);
- /* Unlock the chain of this new record */
- if (tdb_unlock(tdb, tdb->travlocks.hash, F_WRLCK) != 0)
- TDB_LOG((tdb, 0, "tdb_nextkey: WARNING tdb_unlock failed!\n"));
- }
- /* Unlock the chain of old record */
- if (tdb_unlock(tdb, BUCKET(oldhash), F_WRLCK) != 0)
- TDB_LOG((tdb, 0, "tdb_nextkey: WARNING tdb_unlock failed!\n"));
- return key;
-}
-
-/* delete an entry in the database given a key */
-static int tdb_delete_hash(TDB_CONTEXT *tdb, TDB_DATA key, u32 hash)
-{
- tdb_off rec_ptr;
- struct list_struct rec;
- int ret;
-
- if (!(rec_ptr = tdb_find_lock_hash(tdb, key, hash, F_WRLCK, &rec)))
- return -1;
- ret = do_delete(tdb, rec_ptr, &rec);
- if (tdb_unlock(tdb, BUCKET(rec.full_hash), F_WRLCK) != 0)
- TDB_LOG((tdb, 0, "tdb_delete: WARNING tdb_unlock failed!\n"));
- return ret;
-}
-
-int tdb_delete(TDB_CONTEXT *tdb, TDB_DATA key)
-{
- u32 hash = tdb->hash_fn(&key);
- return tdb_delete_hash(tdb, key, hash);
-}
-
-/* store an element in the database, replacing any existing element
- with the same key
-
- return 0 on success, -1 on failure
-*/
-int tdb_store(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, int flag)
-{
- struct list_struct rec;
- u32 hash;
- tdb_off rec_ptr;
- char *p = NULL;
- int ret = 0;
-
- /* find which hash bucket it is in */
- hash = tdb->hash_fn(&key);
- if (tdb_lock(tdb, BUCKET(hash), F_WRLCK) == -1)
- return -1;
-
- /* check for it existing, on insert. */
- if (flag == TDB_INSERT) {
- if (tdb_exists_hash(tdb, key, hash)) {
- tdb->ecode = TDB_ERR_EXISTS;
- goto fail;
- }
- } else {
- /* first try in-place update, on modify or replace. */
- if (tdb_update_hash(tdb, key, hash, dbuf) == 0)
- goto out;
- if (tdb->ecode == TDB_ERR_NOEXIST &&
- flag == TDB_MODIFY) {
- /* if the record doesn't exist and we are in TDB_MODIFY mode then
- we should fail the store */
- goto fail;
- }
- }
- /* reset the error code potentially set by the tdb_update() */
- tdb->ecode = TDB_SUCCESS;
-
- /* delete any existing record - if it doesn't exist we don't
- care. Doing this first reduces fragmentation, and avoids
- coalescing with `allocated' block before it's updated. */
- if (flag != TDB_INSERT)
- tdb_delete_hash(tdb, key, hash);
-
- /* Copy key+value *before* allocating free space in case malloc
- fails and we are left with a dead spot in the tdb. */
-
- if (!(p = (char *)malloc(key.dsize + dbuf.dsize))) {
- tdb->ecode = TDB_ERR_OOM;
- goto fail;
- }
-
- memcpy(p, key.dptr, key.dsize);
- if (dbuf.dsize)
- memcpy(p+key.dsize, dbuf.dptr, dbuf.dsize);
-
- /* we have to allocate some space */
- if (!(rec_ptr = tdb_allocate(tdb, key.dsize + dbuf.dsize, &rec)))
- goto fail;
-
- /* Read hash top into next ptr */
- if (ofs_read(tdb, TDB_HASH_TOP(hash), &rec.next) == -1)
- goto fail;
-
- rec.key_len = key.dsize;
- rec.data_len = dbuf.dsize;
- rec.full_hash = hash;
- rec.magic = TDB_MAGIC;
-
- /* write out and point the top of the hash chain at it */
- if (rec_write(tdb, rec_ptr, &rec) == -1
- || tdb_write(tdb, rec_ptr+sizeof(rec), p, key.dsize+dbuf.dsize)==-1
- || ofs_write(tdb, TDB_HASH_TOP(hash), &rec_ptr) == -1) {
- /* Need to tdb_unallocate() here */
- goto fail;
- }
- out:
- SAFE_FREE(p);
- tdb_unlock(tdb, BUCKET(hash), F_WRLCK);
- return ret;
-fail:
- ret = -1;
- goto out;
-}
-
-/* Attempt to append data to an entry in place - this only works if the new data size
- is <= the old data size and the key exists.
- on failure return -1. Record must be locked before calling.
-*/
-static int tdb_append_inplace(TDB_CONTEXT *tdb, TDB_DATA key, u32 hash, TDB_DATA new_dbuf)
-{
- struct list_struct rec;
- tdb_off rec_ptr;
-
- /* find entry */
- if (!(rec_ptr = tdb_find(tdb, key, hash, &rec)))
- return -1;
-
- /* Append of 0 is always ok. */
- if (new_dbuf.dsize == 0)
- return 0;
-
- /* must be long enough for key, old data + new data and tailer */
- if (rec.rec_len < key.dsize + rec.data_len + new_dbuf.dsize + sizeof(tdb_off)) {
- /* No room. */
- tdb->ecode = TDB_SUCCESS; /* Not really an error */
- return -1;
- }
-
- if (tdb_write(tdb, rec_ptr + sizeof(rec) + rec.key_len + rec.data_len,
- new_dbuf.dptr, new_dbuf.dsize) == -1)
- return -1;
-
- /* update size */
- rec.data_len += new_dbuf.dsize;
- return rec_write(tdb, rec_ptr, &rec);
-}
-
-/* Append to an entry. Create if not exist. */
-
-int tdb_append(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA new_dbuf)
-{
- struct list_struct rec;
- u32 hash;
- tdb_off rec_ptr;
- char *p = NULL;
- int ret = 0;
- size_t new_data_size = 0;
-
- /* find which hash bucket it is in */
- hash = tdb->hash_fn(&key);
- if (tdb_lock(tdb, BUCKET(hash), F_WRLCK) == -1)
- return -1;
-
- /* first try in-place. */
- if (tdb_append_inplace(tdb, key, hash, new_dbuf) == 0)
- goto out;
-
- /* reset the error code potentially set by the tdb_append_inplace() */
- tdb->ecode = TDB_SUCCESS;
-
- /* find entry */
- if (!(rec_ptr = tdb_find(tdb, key, hash, &rec))) {
- if (tdb->ecode != TDB_ERR_NOEXIST)
- goto fail;
-
- /* Not found - create. */
-
- ret = tdb_store(tdb, key, new_dbuf, TDB_INSERT);
- goto out;
- }
-
- new_data_size = rec.data_len + new_dbuf.dsize;
-
- /* Copy key+old_value+value *before* allocating free space in case malloc
- fails and we are left with a dead spot in the tdb. */
-
- if (!(p = (char *)malloc(key.dsize + new_data_size))) {
- tdb->ecode = TDB_ERR_OOM;
- goto fail;
- }
-
- /* Copy the key in place. */
- memcpy(p, key.dptr, key.dsize);
-
- /* Now read the old data into place. */
- if (rec.data_len &&
- tdb_read(tdb, rec_ptr + sizeof(rec) + rec.key_len, p + key.dsize, rec.data_len, 0) == -1)
- goto fail;
-
- /* Finally append the new data. */
- if (new_dbuf.dsize)
- memcpy(p+key.dsize+rec.data_len, new_dbuf.dptr, new_dbuf.dsize);
-
- /* delete any existing record - if it doesn't exist we don't
- care. Doing this first reduces fragmentation, and avoids
- coalescing with `allocated' block before it's updated. */
-
- tdb_delete_hash(tdb, key, hash);
-
- if (!(rec_ptr = tdb_allocate(tdb, key.dsize + new_data_size, &rec)))
- goto fail;
-
- /* Read hash top into next ptr */
- if (ofs_read(tdb, TDB_HASH_TOP(hash), &rec.next) == -1)
- goto fail;
-
- rec.key_len = key.dsize;
- rec.data_len = new_data_size;
- rec.full_hash = hash;
- rec.magic = TDB_MAGIC;
-
- /* write out and point the top of the hash chain at it */
- if (rec_write(tdb, rec_ptr, &rec) == -1
- || tdb_write(tdb, rec_ptr+sizeof(rec), p, key.dsize+new_data_size)==-1
- || ofs_write(tdb, TDB_HASH_TOP(hash), &rec_ptr) == -1) {
- /* Need to tdb_unallocate() here */
- goto fail;
- }
-
- out:
- SAFE_FREE(p);
- tdb_unlock(tdb, BUCKET(hash), F_WRLCK);
- return ret;
-
-fail:
- ret = -1;
- goto out;
-}
-
-static int tdb_already_open(dev_t device,
- ino_t ino)
-{
- TDB_CONTEXT *i;
-
- for (i = tdbs; i; i = i->next) {
- if (i->device == device && i->inode == ino) {
- return 1;
- }
- }
-
- return 0;
-}
-
-/* This is based on the hash algorithm from gdbm */
-static u32 default_tdb_hash(TDB_DATA *key)
-{
- u32 value; /* Used to compute the hash value. */
- u32 i; /* Used to cycle through random values. */
-
- /* Set the initial value from the key size. */
- for (value = 0x238F13AF * key->dsize, i=0; i < key->dsize; i++)
- value = (value + (key->dptr[i] << (i*5 % 24)));
-
- return (1103515243 * value + 12345);
-}
-
-/* open the database, creating it if necessary
-
- The open_flags and mode are passed straight to the open call on the
- database file. A flags value of O_WRONLY is invalid. The hash size
- is advisory, use zero for a default value.
-
- Return is NULL on error, in which case errno is also set. Don't
- try to call tdb_error or tdb_errname, just do strerror(errno).
-
- @param name may be NULL for internal databases. */
-TDB_CONTEXT *tdb_open(const char *name, int hash_size, int tdb_flags,
- int open_flags, mode_t mode)
-{
- return tdb_open_ex(name, hash_size, tdb_flags, open_flags, mode, NULL, NULL);
-}
-
-
-TDB_CONTEXT *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
- int open_flags, mode_t mode,
- tdb_log_func log_fn,
- tdb_hash_func hash_fn)
-{
- TDB_CONTEXT *tdb;
- struct stat st;
- int rev = 0, locked = 0;
- unsigned char *vp;
- u32 vertest;
-
- if (!(tdb = calloc(1, sizeof *tdb))) {
- /* Can't log this */
- errno = ENOMEM;
- goto fail;
- }
- tdb->fd = -1;
- tdb->name = NULL;
- tdb->map_ptr = NULL;
- tdb->flags = tdb_flags;
- tdb->open_flags = open_flags;
- tdb->log_fn = log_fn;
- tdb->hash_fn = hash_fn ? hash_fn : default_tdb_hash;
-
- if ((open_flags & O_ACCMODE) == O_WRONLY) {
- TDB_LOG((tdb, 0, "tdb_open_ex: can't open tdb %s write-only\n",
- name));
- errno = EINVAL;
- goto fail;
- }
-
- if (hash_size == 0)
- hash_size = DEFAULT_HASH_SIZE;
- if ((open_flags & O_ACCMODE) == O_RDONLY) {
- tdb->read_only = 1;
- /* read only databases don't do locking or clear if first */
- tdb->flags |= TDB_NOLOCK;
- tdb->flags &= ~TDB_CLEAR_IF_FIRST;
- }
-
- /* internal databases don't mmap or lock, and start off cleared */
- if (tdb->flags & TDB_INTERNAL) {
- tdb->flags |= (TDB_NOLOCK | TDB_NOMMAP);
- tdb->flags &= ~TDB_CLEAR_IF_FIRST;
- if (tdb_new_database(tdb, hash_size) != 0) {
- TDB_LOG((tdb, 0, "tdb_open_ex: tdb_new_database failed!"));
- goto fail;
- }
- goto internal;
- }
-
- if ((tdb->fd = open(name, open_flags, mode)) == -1) {
- TDB_LOG((tdb, 5, "tdb_open_ex: could not open file %s: %s\n",
- name, strerror(errno)));
- goto fail; /* errno set by open(2) */
- }
-
- /* ensure there is only one process initialising at once */
- if (tdb_brlock(tdb, GLOBAL_LOCK, F_WRLCK, F_SETLKW, 0) == -1) {
- TDB_LOG((tdb, 0, "tdb_open_ex: failed to get global lock on %s: %s\n",
- name, strerror(errno)));
- goto fail; /* errno set by tdb_brlock */
- }
-
- /* we need to zero database if we are the only one with it open */
- if ((tdb_flags & TDB_CLEAR_IF_FIRST) &&
- (locked = (tdb_brlock(tdb, ACTIVE_LOCK, F_WRLCK, F_SETLK, 0) == 0))) {
- open_flags |= O_CREAT;
- if (ftruncate(tdb->fd, 0) == -1) {
- TDB_LOG((tdb, 0, "tdb_open_ex: "
- "failed to truncate %s: %s\n",
- name, strerror(errno)));
- goto fail; /* errno set by ftruncate */
- }
- }
-
- if (read(tdb->fd, &tdb->header, sizeof(tdb->header)) != sizeof(tdb->header)
- || strcmp(tdb->header.magic_food, TDB_MAGIC_FOOD) != 0
- || (tdb->header.version != TDB_VERSION
- && !(rev = (tdb->header.version==TDB_BYTEREV(TDB_VERSION))))) {
- /* its not a valid database - possibly initialise it */
- if (!(open_flags & O_CREAT) || tdb_new_database(tdb, hash_size) == -1) {
- errno = EIO; /* ie bad format or something */
- goto fail;
- }
- rev = (tdb->flags & TDB_CONVERT);
- }
- vp = (unsigned char *)&tdb->header.version;
- vertest = (((u32)vp[0]) << 24) | (((u32)vp[1]) << 16) |
- (((u32)vp[2]) << 8) | (u32)vp[3];
- tdb->flags |= (vertest==TDB_VERSION) ? TDB_BIGENDIAN : 0;
- if (!rev)
- tdb->flags &= ~TDB_CONVERT;
- else {
- tdb->flags |= TDB_CONVERT;
- convert(&tdb->header, sizeof(tdb->header));
- }
- if (fstat(tdb->fd, &st) == -1)
- goto fail;
-
- /* Is it already in the open list? If so, fail. */
- if (tdb_already_open(st.st_dev, st.st_ino)) {
- TDB_LOG((tdb, 2, "tdb_open_ex: "
- "%s (%d,%d) is already open in this process\n",
- name, (int)st.st_dev, (int)st.st_ino));
- errno = EBUSY;
- goto fail;
- }
-
- if (!(tdb->name = (char *)strdup(name))) {
- errno = ENOMEM;
- goto fail;
- }
-
- tdb->map_size = st.st_size;
- tdb->device = st.st_dev;
- tdb->inode = st.st_ino;
- tdb->locked = calloc(tdb->header.hash_size+1, sizeof(tdb->locked[0]));
- if (!tdb->locked) {
- TDB_LOG((tdb, 2, "tdb_open_ex: "
- "failed to allocate lock structure for %s\n",
- name));
- errno = ENOMEM;
- goto fail;
- }
- tdb_mmap(tdb);
- if (locked) {
- if (!tdb->read_only)
- if (tdb_clear_spinlocks(tdb) != 0) {
- TDB_LOG((tdb, 0, "tdb_open_ex: "
- "failed to clear spinlock\n"));
- goto fail;
- }
- if (tdb_brlock(tdb, ACTIVE_LOCK, F_UNLCK, F_SETLK, 0) == -1) {
- TDB_LOG((tdb, 0, "tdb_open_ex: "
- "failed to take ACTIVE_LOCK on %s: %s\n",
- name, strerror(errno)));
- goto fail;
- }
-
- }
-
- /* We always need to do this if the CLEAR_IF_FIRST flag is set, even if
- we didn't get the initial exclusive lock as we need to let all other
- users know we're using it. */
-
- if (tdb_flags & TDB_CLEAR_IF_FIRST) {
- /* leave this lock in place to indicate it's in use */
- if (tdb_brlock(tdb, ACTIVE_LOCK, F_RDLCK, F_SETLKW, 0) == -1)
- goto fail;
- }
-
-
- internal:
- /* Internal (memory-only) databases skip all the code above to
- * do with disk files, and resume here by releasing their
- * global lock and hooking into the active list. */
- if (tdb_brlock(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0) == -1)
- goto fail;
- tdb->next = tdbs;
- tdbs = tdb;
- return tdb;
-
- fail:
- { int save_errno = errno;
-
- if (!tdb)
- return NULL;
-
- if (tdb->map_ptr) {
- if (tdb->flags & TDB_INTERNAL)
- SAFE_FREE(tdb->map_ptr);
- else
- tdb_munmap(tdb);
- }
- SAFE_FREE(tdb->name);
- if (tdb->fd != -1)
- if (close(tdb->fd) != 0)
- TDB_LOG((tdb, 5, "tdb_open_ex: failed to close tdb->fd on error!\n"));
- SAFE_FREE(tdb->locked);
- SAFE_FREE(tdb);
- errno = save_errno;
- return NULL;
- }
-}
-
-/**
- * Close a database.
- *
- * @returns -1 for error; 0 for success.
- **/
-int tdb_close(TDB_CONTEXT *tdb)
-{
- TDB_CONTEXT **i;
- int ret = 0;
-
- if (tdb->map_ptr) {
- if (tdb->flags & TDB_INTERNAL)
- SAFE_FREE(tdb->map_ptr);
- else
- tdb_munmap(tdb);
- }
- SAFE_FREE(tdb->name);
- if (tdb->fd != -1)
- ret = close(tdb->fd);
- SAFE_FREE(tdb->locked);
-
- /* Remove from contexts list */
- for (i = &tdbs; *i; i = &(*i)->next) {
- if (*i == tdb) {
- *i = tdb->next;
- break;
- }
- }
-
- memset(tdb, 0, sizeof(*tdb));
- SAFE_FREE(tdb);
-
- return ret;
-}
-
-/* lock/unlock entire database */
-int tdb_lockall(TDB_CONTEXT *tdb)
-{
- u32 i;
-
- /* There are no locks on read-only dbs */
- if (tdb->read_only)
- return TDB_ERRCODE(TDB_ERR_LOCK, -1);
- for (i = 0; i < tdb->header.hash_size; i++)
- if (tdb_lock(tdb, i, F_WRLCK))
- break;
-
- /* If error, release locks we have... */
- if (i < tdb->header.hash_size) {
- u32 j;
-
- for ( j = 0; j < i; j++)
- tdb_unlock(tdb, j, F_WRLCK);
- return TDB_ERRCODE(TDB_ERR_NOLOCK, -1);
- }
-
- return 0;
-}
-void tdb_unlockall(TDB_CONTEXT *tdb)
-{
- u32 i;
- for (i=0; i < tdb->header.hash_size; i++)
- tdb_unlock(tdb, i, F_WRLCK);
-}
-
-/* lock/unlock one hash chain. This is meant to be used to reduce
- contention - it cannot guarantee how many records will be locked */
-int tdb_chainlock(TDB_CONTEXT *tdb, TDB_DATA key)
-{
- return tdb_lock(tdb, BUCKET(tdb->hash_fn(&key)), F_WRLCK);
-}
-
-int tdb_chainunlock(TDB_CONTEXT *tdb, TDB_DATA key)
-{
- return tdb_unlock(tdb, BUCKET(tdb->hash_fn(&key)), F_WRLCK);
-}
-
-int tdb_chainlock_read(TDB_CONTEXT *tdb, TDB_DATA key)
-{
- return tdb_lock(tdb, BUCKET(tdb->hash_fn(&key)), F_RDLCK);
-}
-
-int tdb_chainunlock_read(TDB_CONTEXT *tdb, TDB_DATA key)
-{
- return tdb_unlock(tdb, BUCKET(tdb->hash_fn(&key)), F_RDLCK);
-}
-
-
-/* register a loging function */
-void tdb_logging_function(TDB_CONTEXT *tdb, void (*fn)(TDB_CONTEXT *, int , const char *, ...))
-{
- tdb->log_fn = fn;
-}
-
-/* reopen a tdb - this can be used after a fork to ensure that we have an independent
- seek pointer from our parent and to re-establish locks */
-int tdb_reopen(TDB_CONTEXT *tdb)
-{
- struct stat st;
-
- if (tdb->flags & TDB_INTERNAL)
- return 0; /* Nothing to do. */
- if (tdb_munmap(tdb) != 0) {
- TDB_LOG((tdb, 0, "tdb_reopen: munmap failed (%s)\n", strerror(errno)));
- goto fail;
- }
- if (close(tdb->fd) != 0)
- TDB_LOG((tdb, 0, "tdb_reopen: WARNING closing tdb->fd failed!\n"));
- tdb->fd = open(tdb->name, tdb->open_flags & ~(O_CREAT|O_TRUNC), 0);
- if (tdb->fd == -1) {
- TDB_LOG((tdb, 0, "tdb_reopen: open failed (%s)\n", strerror(errno)));
- goto fail;
- }
- if (fstat(tdb->fd, &st) != 0) {
- TDB_LOG((tdb, 0, "tdb_reopen: fstat failed (%s)\n", strerror(errno)));
- goto fail;
- }
- if (st.st_ino != tdb->inode || st.st_dev != tdb->device) {
- TDB_LOG((tdb, 0, "tdb_reopen: file dev/inode has changed!\n"));
- goto fail;
- }
- tdb_mmap(tdb);
- if ((tdb->flags & TDB_CLEAR_IF_FIRST) && (tdb_brlock(tdb, ACTIVE_LOCK, F_RDLCK, F_SETLKW, 0) == -1)) {
- TDB_LOG((tdb, 0, "tdb_reopen: failed to obtain active lock\n"));
- goto fail;
- }
-
- return 0;
-
-fail:
- tdb_close(tdb);
- return -1;
-}
-
-/* reopen all tdb's */
-int tdb_reopen_all(void)
-{
- TDB_CONTEXT *tdb;
-
- for (tdb=tdbs; tdb; tdb = tdb->next) {
- /* Ensure no clear-if-first. */
- tdb->flags &= ~TDB_CLEAR_IF_FIRST;
- if (tdb_reopen(tdb) != 0)
- return -1;
- }
-
- return 0;
-}
diff --git a/pppd/tdb.h b/pppd/tdb.h
deleted file mode 100644
index 153b6e9..0000000
--- a/pppd/tdb.h
+++ /dev/null
@@ -1,164 +0,0 @@
-#ifndef __TDB_H__
-#define __TDB_H__
-
-/*
- Unix SMB/CIFS implementation.
-
- trivial database library
-
- Copyright (C) Andrew Tridgell 1999-2004
-
- ** NOTE! The following LGPL license applies to the tdb
- ** library. This does NOT imply that all of Samba is released
- ** under the LGPL
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-*/
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifndef PRINTF_ATTRIBUTE
-/** Use gcc attribute to check printf fns. a1 is the 1-based index of
- * the parameter containing the format, and a2 the index of the first
- * argument. Note that some gcc 2.x versions don't handle this
- * properly **/
-#if (__GNUC__ >= 3)
-#define PRINTF_ATTRIBUTE(a1, a2) __attribute__ ((format (__printf__, a1, a2)))
-#else
-#define PRINTF_ATTRIBUTE(a1, a2)
-#endif
-#endif
-
-/* flags to tdb_store() */
-#define TDB_REPLACE 1
-#define TDB_INSERT 2
-#define TDB_MODIFY 3
-
-/* flags for tdb_open() */
-#define TDB_DEFAULT 0 /* just a readability place holder */
-#define TDB_CLEAR_IF_FIRST 1
-#define TDB_INTERNAL 2 /* don't store on disk */
-#define TDB_NOLOCK 4 /* don't do any locking */
-#define TDB_NOMMAP 8 /* don't use mmap */
-#define TDB_CONVERT 16 /* convert endian (internal use) */
-#define TDB_BIGENDIAN 32 /* header is big-endian (internal use) */
-
-#define TDB_ERRCODE(code, ret) ((tdb->ecode = (code)), ret)
-
-/* error codes */
-enum TDB_ERROR {TDB_SUCCESS=0, TDB_ERR_CORRUPT, TDB_ERR_IO, TDB_ERR_LOCK,
- TDB_ERR_OOM, TDB_ERR_EXISTS, TDB_ERR_NOLOCK, TDB_ERR_LOCK_TIMEOUT,
- TDB_ERR_NOEXIST};
-
-#ifndef u32
-#define u32 unsigned
-#endif
-
-typedef struct {
- char *dptr;
- size_t dsize;
-} TDB_DATA;
-
-typedef u32 tdb_len;
-typedef u32 tdb_off;
-
-/* this is stored at the front of every database */
-struct tdb_header {
- char magic_food[32]; /* for /etc/magic */
- u32 version; /* version of the code */
- u32 hash_size; /* number of hash entries */
- tdb_off rwlocks;
- tdb_off reserved[31];
-};
-
-struct tdb_lock_type {
- u32 count;
- u32 ltype;
-};
-
-struct tdb_traverse_lock {
- struct tdb_traverse_lock *next;
- u32 off;
- u32 hash;
-};
-
-/* this is the context structure that is returned from a db open */
-typedef struct tdb_context {
- char *name; /* the name of the database */
- void *map_ptr; /* where it is currently mapped */
- int fd; /* open file descriptor for the database */
- tdb_len map_size; /* how much space has been mapped */
- int read_only; /* opened read-only */
- struct tdb_lock_type *locked; /* array of chain locks */
- enum TDB_ERROR ecode; /* error code for last tdb error */
- struct tdb_header header; /* a cached copy of the header */
- u32 flags; /* the flags passed to tdb_open */
- struct tdb_traverse_lock travlocks; /* current traversal locks */
- struct tdb_context *next; /* all tdbs to avoid multiple opens */
- dev_t device; /* uniquely identifies this tdb */
- ino_t inode; /* uniquely identifies this tdb */
- void (*log_fn)(struct tdb_context *tdb, int level, const char *, ...) PRINTF_ATTRIBUTE(3,4); /* logging function */
- u32 (*hash_fn)(TDB_DATA *key);
- int open_flags; /* flags used in the open - needed by reopen */
-} TDB_CONTEXT;
-
-typedef int (*tdb_traverse_func)(TDB_CONTEXT *, TDB_DATA, TDB_DATA, void *);
-typedef void (*tdb_log_func)(TDB_CONTEXT *, int , const char *, ...);
-typedef u32 (*tdb_hash_func)(TDB_DATA *key);
-
-TDB_CONTEXT *tdb_open(const char *name, int hash_size, int tdb_flags,
- int open_flags, mode_t mode);
-TDB_CONTEXT *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
- int open_flags, mode_t mode,
- tdb_log_func log_fn,
- tdb_hash_func hash_fn);
-
-int tdb_reopen(TDB_CONTEXT *tdb);
-int tdb_reopen_all(void);
-void tdb_logging_function(TDB_CONTEXT *tdb, tdb_log_func);
-enum TDB_ERROR tdb_error(TDB_CONTEXT *tdb);
-const char *tdb_errorstr(TDB_CONTEXT *tdb);
-TDB_DATA tdb_fetch(TDB_CONTEXT *tdb, TDB_DATA key);
-int tdb_delete(TDB_CONTEXT *tdb, TDB_DATA key);
-int tdb_store(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, int flag);
-int tdb_append(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA new_dbuf);
-int tdb_close(TDB_CONTEXT *tdb);
-TDB_DATA tdb_firstkey(TDB_CONTEXT *tdb);
-TDB_DATA tdb_nextkey(TDB_CONTEXT *tdb, TDB_DATA key);
-int tdb_traverse(TDB_CONTEXT *tdb, tdb_traverse_func fn, void *);
-int tdb_exists(TDB_CONTEXT *tdb, TDB_DATA key);
-int tdb_lockkeys(TDB_CONTEXT *tdb, u32 number, TDB_DATA keys[]);
-void tdb_unlockkeys(TDB_CONTEXT *tdb);
-int tdb_lockall(TDB_CONTEXT *tdb);
-void tdb_unlockall(TDB_CONTEXT *tdb);
-
-/* Low level locking functions: use with care */
-void tdb_set_lock_alarm(sig_atomic_t *palarm);
-int tdb_chainlock(TDB_CONTEXT *tdb, TDB_DATA key);
-int tdb_chainunlock(TDB_CONTEXT *tdb, TDB_DATA key);
-
-/* Debug functions. Not used in production. */
-void tdb_dump_all(TDB_CONTEXT *tdb);
-int tdb_printfreelist(TDB_CONTEXT *tdb);
-
-extern TDB_DATA tdb_null;
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* tdb.h */