* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
*/
-#include "config.h"
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
#include <signal.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/resource.h>
+#include <sys/wait.h>
#include "xmalloc.h"
#include "misc.h"
#include "mountd.h"
#include "rpcmisc.h"
+#include "pseudoflavors.h"
+
+extern void cache_open(void);
+extern struct nfs_fh_len *cache_get_filehandle(nfs_export *exp, int len, char *p);
+extern int cache_export(nfs_export *exp, char *path);
+
+extern void my_svc_run(void);
static void usage(const char *, int exitcode);
static exports get_exportlist(void);
-static struct nfs_fh_len *get_rootfh(struct svc_req *, dirpath *, int *, int v3);
+static struct nfs_fh_len *get_rootfh(struct svc_req *, dirpath *, nfs_export **, mountstat3 *, int v3);
+
+int reverse_resolve = 0;
+int new_cache = 0;
+int manage_gids;
+int use_ipaddr = -1;
+
+/* PRC: a high-availability callout program can be specified with -H
+ * When this is done, the program will receive callouts whenever clients
+ * send mount or unmount requests -- the callout is not needed for 2.6 kernel */
+char *ha_callout_prog = NULL;
+
+/* Number of mountd threads to start. Default is 1 and
+ * that's probably enough unless you need hundreds of
+ * clients to be able to mount at once. */
+static int num_threads = 1;
+/* Arbitrary limit on number of threads */
+#define MAX_THREADS 64
static struct option longopts[] =
{
{ "foreground", 0, 0, 'F' },
- { "descriptors", 0, 0, 'o' },
+ { "descriptors", 1, 0, 'o' },
{ "debug", 1, 0, 'd' },
{ "help", 0, 0, 'h' },
{ "exports-file", 1, 0, 'f' },
{ "version", 0, 0, 'v' },
{ "port", 1, 0, 'p' },
{ "no-tcp", 0, 0, 'n' },
+ { "ha-callout", 1, 0, 'H' },
+ { "state-directory-path", 1, 0, 's' },
+ { "num-threads", 1, 0, 't' },
+ { "reverse-lookup", 0, 0, 'r' },
+ { "manage-gids", 0, 0, 'g' },
{ NULL, 0, 0, 0 }
};
static int nfs_version = -1;
+static void
+unregister_services (void)
+{
+ if (nfs_version & 0x1)
+ pmap_unset (MOUNTPROG, MOUNTVERS);
+ if (nfs_version & (0x1 << 1))
+ pmap_unset (MOUNTPROG, MOUNTVERS_POSIX);
+ if (nfs_version & (0x1 << 2))
+ pmap_unset (MOUNTPROG, MOUNTVERS_NFSV3);
+}
+
+/* Wait for all worker child processes to exit and reap them */
+static void
+wait_for_workers (void)
+{
+ int status;
+ pid_t pid;
+
+ for (;;) {
+
+ pid = waitpid(0, &status, 0);
+
+ if (pid < 0) {
+ if (errno == ECHILD)
+ return; /* no more children */
+ xlog(L_FATAL, "mountd: can't wait: %s\n",
+ strerror(errno));
+ }
+
+ /* Note: because we SIG_IGN'd SIGCHLD earlier, this
+ * does not happen on 2.6 kernels, and waitpid() blocks
+ * until all the children are dead then returns with
+ * -ECHILD. But, we don't need to do anything on the
+ * death of individual workers, so we don't care. */
+ xlog(L_NOTICE, "mountd: reaped child %d, status %d\n",
+ (int)pid, status);
+ }
+}
+
+/* Fork num_threads worker children and wait for them */
+static void
+fork_workers(void)
+{
+ int i;
+ pid_t pid;
+
+ xlog(L_NOTICE, "mountd: starting %d threads\n", num_threads);
+
+ for (i = 0 ; i < num_threads ; i++) {
+ pid = fork();
+ if (pid < 0) {
+ xlog(L_FATAL, "mountd: cannot fork: %s\n",
+ strerror(errno));
+ }
+ if (pid == 0) {
+ /* worker child */
+
+ /* Re-enable the default action on SIGTERM et al
+ * so that workers die naturally when sent them.
+ * Only the parent unregisters with pmap and
+ * hence needs to do special SIGTERM handling. */
+ struct sigaction sa;
+ sa.sa_handler = SIG_DFL;
+ sa.sa_flags = 0;
+ sigemptyset(&sa.sa_mask);
+ sigaction(SIGHUP, &sa, NULL);
+ sigaction(SIGINT, &sa, NULL);
+ sigaction(SIGTERM, &sa, NULL);
+
+ /* fall into my_svc_run in caller */
+ return;
+ }
+ }
+
+ /* in parent */
+ wait_for_workers();
+ unregister_services();
+ xlog(L_NOTICE, "mountd: no more workers, exiting\n");
+ exit(0);
+}
+
/*
* Signal handler.
*/
static void
killer (int sig)
{
- if (nfs_version & 0x1)
- pmap_unset (MOUNTPROG, MOUNTVERS);
- if (nfs_version & (0x1 << 1))
- pmap_unset (MOUNTPROG, MOUNTVERS_POSIX);
- if (nfs_version & (0x1 << 2))
- pmap_unset (MOUNTPROG, MOUNTVERS_NFSV3);
- xlog (L_FATAL, "Caught signal %d, un-registering and exiting.", sig);
+ unregister_services();
+ if (num_threads > 1) {
+ /* play Kronos and eat our children */
+ kill(0, SIGTERM);
+ wait_for_workers();
+ }
+ xlog (L_FATAL, "Caught signal %d, un-registering and exiting.", sig);
+}
+
+static void
+sig_hup (int sig)
+{
+ /* don't exit on SIGHUP */
+ xlog (L_NOTICE, "Received SIGHUP... Ignoring.\n", sig);
+ return;
}
bool_t
struct nfs_fh_len *fh;
xlog(D_CALL, "MNT1(%s) called", *path);
- if ((fh = get_rootfh(rqstp, path, &res->fhs_status, 0)) != NULL)
+ fh = get_rootfh(rqstp, path, NULL, &res->fhs_status, 0);
+ if (fh)
memcpy(&res->fhstatus_u.fhs_fhandle, fh->fh_handle, 32);
return 1;
}
{
struct sockaddr_in *addr =
(struct sockaddr_in *) svc_getcaller(rqstp->rq_xprt);
- xlog(L_NOTICE, "dump request from %s",
- inet_ntoa(addr->sin_addr));
+ xlog(D_CALL, "dump request from %s.", inet_ntoa(addr->sin_addr));
*res = mountlist_list();
+
return 1;
}
if (!(exp = auth_authenticate("unmount", sin, p))) {
return 1;
}
- mountlist_del(exp, p);
- export_reset (exp);
+
+ mountlist_del(inet_ntoa(sin->sin_addr), p);
return 1;
}
{
struct sockaddr_in *addr =
(struct sockaddr_in *) svc_getcaller(rqstp->rq_xprt);
- xlog(L_NOTICE, "export request from %s",
- inet_ntoa(addr->sin_addr));
+
+ xlog(D_CALL, "export request from %s.", inet_ntoa(addr->sin_addr));
*resp = get_exportlist();
+
return 1;
}
{
struct sockaddr_in *addr =
(struct sockaddr_in *) svc_getcaller(rqstp->rq_xprt);
- xlog(L_NOTICE, "exportall request from %s",
- inet_ntoa(addr->sin_addr));
+
+ xlog(D_CALL, "exportall request from %s.", inet_ntoa(addr->sin_addr));
*resp = get_exportlist();
+
return 1;
}
}
/* Now authenticate the intruder... */
- if (!(exp = auth_authenticate("mount", sin, p))) {
+ exp = auth_authenticate("pathconf", sin, p);
+ if (!exp) {
return 1;
} else if (stat(p, &stb) < 0) {
xlog(L_WARNING, "can't stat exported dir %s: %s",
p, strerror(errno));
- export_reset (exp);
return 1;
}
res->pc_mask[0] = 0;
res->pc_mask[1] = 0;
- export_reset (exp);
-
return 1;
}
+/*
+ * We should advertise the preferred flavours first. (See RFC 2623
+ * section 2.7.) We leave that to the administrator, by advertising
+ * flavours in the order they were listed in /etc/exports. AUTH_NULL is
+ * dropped from the list to avoid backward compatibility issue with
+ * older Linux clients, who inspect the list in reversed order.
+ *
+ * XXX: It might be more helpful to rearrange these so that flavors
+ * giving more access (as determined from readonly and id-squashing
+ * options) come first. (If we decide to do that we should probably do
+ * that when reading the exports rather than here.)
+ */
+static void set_authflavors(struct mountres3_ok *ok, nfs_export *exp)
+{
+ struct sec_entry *s;
+ static int flavors[SECFLAVOR_COUNT];
+ int i = 0;
+
+ for (s = exp->m_export.e_secinfo; s->flav; s++) {
+ if (s->flav->fnum == AUTH_NULL)
+ continue;
+ flavors[i] = s->flav->fnum;
+ i++;
+ }
+ ok->auth_flavors.auth_flavors_val = flavors;
+ ok->auth_flavors.auth_flavors_len = i;
+}
+
/*
* NFSv3 MOUNT procedure
*/
bool_t
mount_mnt_3_svc(struct svc_req *rqstp, dirpath *path, mountres3 *res)
{
- static int flavors[] = { AUTH_NULL, AUTH_UNIX };
+ struct mountres3_ok *ok = &res->mountres3_u.mountinfo;
+ nfs_export *exp;
struct nfs_fh_len *fh;
xlog(D_CALL, "MNT3(%s) called", *path);
- if ((fh = get_rootfh(rqstp, path, (int *) &res->fhs_status, 1)) != NULL) {
- struct mountres3_ok *ok = &res->mountres3_u.mountinfo;
+ fh = get_rootfh(rqstp, path, &exp, &res->fhs_status, 1);
+ if (!fh)
+ return 1;
- ok->fhandle.fhandle3_len = fh->fh_size;
- ok->fhandle.fhandle3_val = fh->fh_handle;
- ok->auth_flavors.auth_flavors_len = 2;
- ok->auth_flavors.auth_flavors_val = flavors;
- }
+ ok->fhandle.fhandle3_len = fh->fh_size;
+ ok->fhandle.fhandle3_val = (char *)fh->fh_handle;
+ set_authflavors(ok, exp);
return 1;
}
static struct nfs_fh_len *
-get_rootfh(struct svc_req *rqstp, dirpath *path, int *error, int v3)
+get_rootfh(struct svc_req *rqstp, dirpath *path, nfs_export **expret,
+ mountstat3 *error, int v3)
{
struct sockaddr_in *sin =
(struct sockaddr_in *) svc_getcaller(rqstp->rq_xprt);
- struct stat stb;
+ struct stat stb, estb;
nfs_export *exp;
+ struct nfs_fh_len *fh;
char rpath[MAXPATHLEN+1];
char *p = *path;
}
/* Now authenticate the intruder... */
- if (!(exp = auth_authenticate("mount", sin, p))) {
+ exp = auth_authenticate("mount", sin, p);
+ if (!exp) {
*error = NFSERR_ACCES;
- } else if (stat(p, &stb) < 0) {
+ return NULL;
+ }
+ if (stat(p, &stb) < 0) {
xlog(L_WARNING, "can't stat exported dir %s: %s",
p, strerror(errno));
if (errno == ENOENT)
*error = NFSERR_NOENT;
else
*error = NFSERR_ACCES;
- } else if (!S_ISDIR(stb.st_mode) && !S_ISREG(stb.st_mode)) {
+ return NULL;
+ }
+ if (!S_ISDIR(stb.st_mode) && !S_ISREG(stb.st_mode)) {
xlog(L_WARNING, "%s is not a directory or regular file", p);
*error = NFSERR_NOTDIR;
- } else {
- struct nfs_fh_len *fh;
+ return NULL;
+ }
+ if (stat(exp->m_export.e_path, &estb) < 0) {
+ xlog(L_WARNING, "can't stat export point %s: %s",
+ p, strerror(errno));
+ *error = NFSERR_NOENT;
+ return NULL;
+ }
+ if (estb.st_dev != stb.st_dev
+ && (!new_cache
+ || !(exp->m_export.e_flags & NFSEXP_CROSSMOUNT))) {
+ xlog(L_WARNING, "request to export directory %s below nearest filesystem %s",
+ p, exp->m_export.e_path);
+ *error = NFSERR_ACCES;
+ return NULL;
+ }
+ if (exp->m_export.e_mountpoint &&
+ !is_mountpoint(exp->m_export.e_mountpoint[0]?
+ exp->m_export.e_mountpoint:
+ exp->m_export.e_path)) {
+ xlog(L_WARNING, "request to export an unmounted filesystem: %s",
+ p);
+ *error = NFSERR_NOENT;
+ return NULL;
+ }
+
+ if (new_cache) {
+ /* This will be a static private nfs_export with just one
+ * address. We feed it to kernel then extract the filehandle,
+ *
+ */
+ if (cache_export(exp, p)) {
+ *error = NFSERR_ACCES;
+ return NULL;
+ }
+ fh = cache_get_filehandle(exp, v3?64:32, p);
+ if (fh == NULL) {
+ *error = NFSERR_ACCES;
+ return NULL;
+ }
+ } else {
if (exp->m_exported<1)
export_export(exp);
if (!exp->m_xtabent)
fh = getfh_old ((struct sockaddr *) sin,
stb.st_dev, stb.st_ino);
}
- if (fh != NULL) {
- mountlist_add(exp, p);
- *error = NFS_OK;
- export_reset (exp);
- return fh;
+ if (fh == NULL) {
+ xlog(L_WARNING, "getfh failed: %s", strerror(errno));
+ *error = NFSERR_ACCES;
+ return NULL;
}
- xlog(L_WARNING, "getfh failed: %s", strerror(errno));
- *error = NFSERR_ACCES;
}
- export_reset (exp);
- return NULL;
+ *error = NFS_OK;
+ mountlist_add(inet_ntoa(sin->sin_addr), p);
+ if (expret)
+ *expret = exp;
+ return fh;
}
static exports
struct groupnode *g, *ng, *c, **cp;
nfs_export *exp;
int i;
+ static unsigned int ecounter;
+ unsigned int acounter;
- if (!auth_reload() && elist)
+ acounter = auth_reload();
+ if (elist && acounter == ecounter)
return elist;
+ ecounter = acounter;
+
for (e = elist; e != NULL; e = ne) {
ne = e->ex_next;
for (g = e->ex_groups; g != NULL; g = ng) {
for (i = 0; i < MCL_MAXTYPES; i++) {
for (exp = exportlist[i]; exp; exp = exp->m_next) {
for (e = elist; e != NULL; e = e->ex_next) {
- if (!strcmp(exp->m_export.m_path, e->ex_dir))
+ if (!strcmp(exp->m_export.e_path, e->ex_dir))
break;
}
if (!e) {
e = (struct exportnode *) xmalloc(sizeof(*e));
e->ex_next = elist;
e->ex_groups = NULL;
- e->ex_dir = xstrdup(exp->m_export.m_path);
+ e->ex_dir = xstrdup(exp->m_export.e_path);
elist = e;
}
xfree(c->gr_name);
xfree(c);
xfree (hp);
- if ((c = *cp) == NULL)
- break;
+ continue;
}
- else
- xfree (hp);
+ xfree (hp);
}
cp = &(c->gr_next);
}
main(int argc, char **argv)
{
char *export_file = _PATH_EXPORTS;
+ char *state_dir = NFS_STATEDIR;
int foreground = 0;
int port = 0;
- int descriptors = 256;
+ int descriptors = 0;
int c;
struct sigaction sa;
struct rlimit rlim;
/* Parse the command line options and arguments. */
opterr = 0;
- while ((c = getopt_long(argc, argv, "o:Fd:f:p:P:hN:V:v", longopts, NULL)) != EOF)
+ while ((c = getopt_long(argc, argv, "o:nFd:f:p:P:hH:N:V:vrs:t:g", longopts, NULL)) != EOF)
switch (c) {
+ case 'g':
+ manage_gids = 1;
+ break;
case 'o':
descriptors = atoi(optarg);
if (descriptors <= 0) {
case 'f':
export_file = optarg;
break;
+ case 'H': /* PRC: specify a high-availability callout program */
+ ha_callout_prog = optarg;
+ break;
case 'h':
usage(argv [0], 0);
break;
case 'n':
_rpcfdtype = SOCK_DGRAM;
break;
+ case 'r':
+ reverse_resolve = 1;
+ break;
+ case 's':
+ if ((state_dir = xstrdup(optarg)) == NULL) {
+ fprintf(stderr, "%s: xstrdup(%s) failed!\n",
+ argv[0], optarg);
+ exit(1);
+ }
+ break;
+ case 't':
+ num_threads = atoi (optarg);
+ break;
case 'V':
nfs_version |= 1 << (atoi (optarg) - 1);
break;
if (optind != argc || !(nfs_version & 0x7))
usage(argv [0], 1);
- if (chdir(NFS_STATEDIR)) {
+ if (chdir(state_dir)) {
fprintf(stderr, "%s: chdir(%s) failed: %s\n",
- argv [0], NFS_STATEDIR, strerror(errno));
+ argv [0], state_dir, strerror(errno));
exit(1);
}
- if (getrlimit (RLIMIT_NOFILE, &rlim) != 0) {
+ if (getrlimit (RLIMIT_NOFILE, &rlim) != 0)
fprintf(stderr, "%s: getrlimit (RLIMIT_NOFILE) failed: %s\n",
- argv [0], strerror(errno));
- exit(1);
- }
-
- rlim.rlim_cur = descriptors;
- if (setrlimit (RLIMIT_NOFILE, &rlim) != 0) {
- fprintf(stderr, "%s: setrlimit (RLIMIT_NOFILE) failed: %s\n",
- argv [0], strerror(errno));
- exit(1);
+ argv [0], strerror(errno));
+ else {
+ /* glibc sunrpc code dies if getdtablesize > FD_SETSIZE */
+ if ((descriptors == 0 && rlim.rlim_cur > FD_SETSIZE) ||
+ descriptors > FD_SETSIZE)
+ descriptors = FD_SETSIZE;
+ if (descriptors) {
+ rlim.rlim_cur = descriptors;
+ if (setrlimit (RLIMIT_NOFILE, &rlim) != 0) {
+ fprintf(stderr, "%s: setrlimit (RLIMIT_NOFILE) failed: %s\n",
+ argv [0], strerror(errno));
+ exit(1);
+ }
+ }
}
-
/* Initialize logging. */
-/* xlog_open("mountd"); */
+ if (!foreground) xlog_stderr(0);
+ xlog_open("mountd");
sa.sa_handler = SIG_IGN;
sa.sa_flags = 0;
sigaction(SIGHUP, &sa, NULL);
sigaction(SIGINT, &sa, NULL);
sigaction(SIGTERM, &sa, NULL);
+ sigaction(SIGPIPE, &sa, NULL);
/* WARNING: the following works on Linux and SysV, but not BSD! */
sigaction(SIGCHLD, &sa, NULL);
/* Daemons should close all extra filehandles ... *before* RPC init. */
- if (!foreground) {
- int fd = sysconf (_SC_OPEN_MAX);
- while (--fd > 2)
- (void) close(fd);
- }
+ if (!foreground)
+ closeall(3);
+
+ new_cache = check_new_cache();
+ if (new_cache)
+ cache_open();
if (nfs_version & 0x1)
rpc_init("mountd", MOUNTPROG, MOUNTVERS,
mount_dispatch, port);
sa.sa_handler = killer;
- sigaction(SIGHUP, &sa, NULL);
sigaction(SIGINT, &sa, NULL);
sigaction(SIGTERM, &sa, NULL);
+ sa.sa_handler = sig_hup;
+ sigaction(SIGHUP, &sa, NULL);
auth_init(export_file);
if (fd > 2) (void) close(fd);
}
setsid();
- xlog_background();
}
- svc_run();
+ /* silently bounds check num_threads */
+ if (foreground)
+ num_threads = 1;
+ else if (num_threads < 1)
+ num_threads = 1;
+ else if (num_threads > MAX_THREADS)
+ num_threads = MAX_THREADS;
+
+ if (num_threads > 1)
+ fork_workers();
+
+ my_svc_run();
xlog(L_ERROR, "Ack! Gack! svc_run returned!\n");
exit(1);
"Usage: %s [-F|--foreground] [-h|--help] [-v|--version] [-d kind|--debug kind]\n"
" [-o num|--descriptors num] [-f exports-file|--exports-file=file]\n"
" [-p|--port port] [-V version|--nfs-version version]\n"
-" [-N version|--no-nfs-version version] [-n|--no-tcp]\n", prog);
+" [-N version|--no-nfs-version version] [-n|--no-tcp]\n"
+" [-H ha-callout-prog] [-s|--state-directory-path path]\n"
+" [-g|--manage-gids] [-t num|--num-threads=num]\n", prog);
exit(n);
}
projects / nfs-utils.git / blobdiff