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-rw-r--r--utils/idmapd/idmapd.c1091
1 files changed, 1091 insertions, 0 deletions
diff --git a/utils/idmapd/idmapd.c b/utils/idmapd/idmapd.c
new file mode 100644
index 0000000..cd9a965
--- /dev/null
+++ b/utils/idmapd/idmapd.c
@@ -0,0 +1,1091 @@
+/*
+ * idmapd.c
+ *
+ * Userland daemon for idmap.
+ *
+ * Copyright (c) 2002 The Regents of the University of Michigan.
+ * All rights reserved.
+ *
+ * Marius Aamodt Eriksen <marius@umich.edu>
+ *
+ * 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. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/inotify.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <time.h>
+
+#include "nfs_idmap.h"
+
+#include <err.h>
+#include <errno.h>
+#include <event2/event.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <unistd.h>
+#include <netdb.h>
+#include <inttypes.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <pwd.h>
+#include <grp.h>
+#include <limits.h>
+#include <ctype.h>
+#include <libgen.h>
+#include <nfsidmap.h>
+
+#include "xlog.h"
+#include "conffile.h"
+#include "queue.h"
+#include "nfslib.h"
+
+#ifndef PIPEFS_DIR
+#define PIPEFS_DIR NFS_STATEDIR "/rpc_pipefs/"
+#endif
+
+#ifndef NFSD_DIR
+#define NFSD_DIR "/proc/net/rpc"
+#endif
+
+#ifndef CLIENT_CACHE_TIMEOUT_FILE
+#define CLIENT_CACHE_TIMEOUT_FILE "/proc/sys/fs/nfs/idmap_cache_timeout"
+#endif
+
+#ifndef NFS4NOBODY_USER
+#define NFS4NOBODY_USER "nobody"
+#endif
+
+#ifndef NFS4NOBODY_GROUP
+#define NFS4NOBODY_GROUP "nobody"
+#endif
+
+/* From Niels */
+#define CONF_SAVE(w, f) do { \
+ char *p = f; \
+ if (p != NULL) \
+ (w) = p; \
+} while (0)
+
+#define IC_IDNAME 0
+#define IC_IDNAME_CHAN NFSD_DIR "/nfs4.idtoname/channel"
+#define IC_IDNAME_FLUSH NFSD_DIR "/nfs4.idtoname/flush"
+
+#define IC_NAMEID 1
+#define IC_NAMEID_CHAN NFSD_DIR "/nfs4.nametoid/channel"
+#define IC_NAMEID_FLUSH NFSD_DIR "/nfs4.nametoid/flush"
+
+struct idmap_client {
+ short ic_which;
+ char ic_clid[30];
+ char *ic_id;
+ char ic_path[PATH_MAX];
+ int ic_fd;
+ int ic_dirfd;
+ int ic_scanned;
+ struct event *ic_event;
+ TAILQ_ENTRY(idmap_client) ic_next;
+};
+static struct idmap_client nfsd_ic[2] = {
+{
+ .ic_which = IC_IDNAME,
+ .ic_clid = "",
+ .ic_id = "Server",
+ .ic_path = IC_IDNAME_CHAN,
+ .ic_fd = -1,
+ .ic_dirfd = -1,
+ .ic_scanned = 0
+},
+{
+ .ic_which = IC_NAMEID,
+ .ic_clid = "",
+ .ic_id = "Server",
+ .ic_path = IC_NAMEID_CHAN,
+ .ic_fd = -1,
+ .ic_dirfd = -1,
+ .ic_scanned = 0
+},
+};
+
+TAILQ_HEAD(idmap_clientq, idmap_client);
+
+static void dirscancb(int, short, void *);
+static void clntscancb(int, short, void *);
+static void svrreopen(int, short, void *);
+static int nfsopen(struct idmap_client *);
+static void nfscb(int, short, void *);
+static void nfsdcb(int, short, void *);
+static int addfield(char **, ssize_t *, char *);
+static int getfield(char **, char *, size_t);
+
+static void imconv(struct idmap_client *, struct idmap_msg *);
+static void idtonameres(struct idmap_msg *);
+static void nametoidres(struct idmap_msg *);
+
+static int nfsdopen(void);
+static void nfsdclose(void);
+static int nfsdopenone(struct idmap_client *);
+static void nfsdreopen_one(struct idmap_client *);
+static void nfsdreopen(void);
+
+static int verbose = 0;
+#define DEFAULT_IDMAP_CACHE_EXPIRY 600 /* seconds */
+static int cache_entry_expiration = 0;
+static char pipefsdir[PATH_MAX];
+static char *nobodyuser, *nobodygroup;
+static uid_t nobodyuid;
+static gid_t nobodygid;
+static struct event_base *evbase = NULL;
+static bool signal_received = false;
+static int inotify_fd = -1;
+
+static void
+sig_die(int signal)
+{
+ if (signal_received) {
+ xlog_warn("forced exiting on signal %d\n", signal);
+ exit(0);
+ }
+
+ signal_received = true;
+ xlog_warn("exiting on signal %d\n", signal);
+ event_base_loopexit(evbase, NULL);
+}
+
+static int
+flush_nfsd_cache(char *path, time_t now)
+{
+ int fd;
+ char stime[32];
+
+ sprintf(stime, "%" PRId64 "\n", (int64_t)now);
+ fd = open(path, O_RDWR);
+ if (fd == -1)
+ return -1;
+ if (write(fd, stime, strlen(stime)) != (ssize_t)strlen(stime)) {
+ errx(1, "Flushing nfsd cache failed: errno %d (%s)",
+ errno, strerror(errno));
+ }
+ close(fd);
+ return 0;
+}
+
+static int
+flush_nfsd_idmap_cache(void)
+{
+ time_t now = time(NULL);
+ int ret;
+
+ ret = flush_nfsd_cache(IC_IDNAME_FLUSH, now);
+ if (ret)
+ return ret;
+ ret = flush_nfsd_cache(IC_NAMEID_FLUSH, now);
+ return ret;
+}
+
+static void usage(char *progname)
+{
+ fprintf(stderr, "Usage: %s [-hfvCS] [-p path] [-c path]\n",
+ basename(progname));
+}
+
+int
+main(int argc, char **argv)
+{
+ int wd = -1, opt, fg = 0, nfsdret = -1;
+ struct idmap_clientq icq;
+ struct event *rootdirev = NULL, *clntdirev = NULL,
+ *svrdirev = NULL, *inotifyev = NULL;
+ struct event *initialize = NULL;
+ struct passwd *pw;
+ struct group *gr;
+ struct stat sb;
+ char *xpipefsdir = NULL;
+ int serverstart = 1, clientstart = 1;
+ int ret;
+ char *progname;
+ char *conf_path = NULL;
+
+ nobodyuser = NFS4NOBODY_USER;
+ nobodygroup = NFS4NOBODY_GROUP;
+ strlcpy(pipefsdir, PIPEFS_DIR, sizeof(pipefsdir));
+
+ if ((progname = strrchr(argv[0], '/')))
+ progname++;
+ else
+ progname = argv[0];
+ xlog_open(progname);
+
+#define GETOPTSTR "hvfd:p:U:G:c:CS"
+ opterr=0; /* Turn off error messages */
+ while ((opt = getopt(argc, argv, GETOPTSTR)) != -1) {
+ if (opt == 'c') {
+ warnx("-c is deprecated and may be removed in the "
+ "future. See idmapd(8).");
+ conf_path = optarg;
+ }
+ if (opt == '?') {
+ if (strchr(GETOPTSTR, optopt))
+ warnx("'-%c' option requires an argument.", optopt);
+ else
+ warnx("'-%c' is an invalid argument.", optopt);
+ usage(progname);
+ exit(1);
+ }
+ }
+ optind = 1;
+
+ if (conf_path) { /* deprecated -c option was specified */
+ if (stat(conf_path, &sb) == -1 && (errno == ENOENT || errno == EACCES)) {
+ warn("Skipping configuration file \"%s\"", conf_path);
+ conf_path = NULL;
+ } else {
+ conf_init_file(conf_path);
+ verbose = conf_get_num("General", "Verbosity", 0);
+ cache_entry_expiration = conf_get_num("General",
+ "Cache-Expiration", DEFAULT_IDMAP_CACHE_EXPIRY);
+ CONF_SAVE(xpipefsdir, conf_get_str("General", "Pipefs-Directory"));
+ if (xpipefsdir != NULL)
+ strlcpy(pipefsdir, xpipefsdir, sizeof(pipefsdir));
+ CONF_SAVE(nobodyuser, conf_get_str("Mapping", "Nobody-User"));
+ CONF_SAVE(nobodygroup, conf_get_str("Mapping", "Nobody-Group"));
+ if (conf_get_bool("General", "server-only", false))
+ clientstart = 0;
+ if (conf_get_bool("General", "client-only", false))
+ serverstart = 0;
+ }
+ } else {
+ conf_path = NFS_CONFFILE;
+ conf_init_file(conf_path);
+ CONF_SAVE(xpipefsdir, conf_get_str("General", "Pipefs-Directory"));
+ if (xpipefsdir != NULL)
+ strlcpy(pipefsdir, xpipefsdir, sizeof(pipefsdir));
+
+ conf_path = _PATH_IDMAPDCONF;
+ conf_init_file(conf_path);
+ verbose = conf_get_num("General", "Verbosity", 0);
+ cache_entry_expiration = conf_get_num("General",
+ "cache-expiration", DEFAULT_IDMAP_CACHE_EXPIRY);
+ CONF_SAVE(nobodyuser, conf_get_str("Mapping", "Nobody-User"));
+ CONF_SAVE(nobodygroup, conf_get_str("Mapping", "Nobody-Group"));
+ if (conf_get_bool("General", "server-only", false))
+ clientstart = 0;
+ if (conf_get_bool("General", "client-only", false))
+ serverstart = 0;
+ }
+
+ while ((opt = getopt(argc, argv, GETOPTSTR)) != -1)
+ switch (opt) {
+ case 'v':
+ verbose++;
+ break;
+ case 'f':
+ fg = 1;
+ break;
+ case 'p':
+ strlcpy(pipefsdir, optarg, sizeof(pipefsdir));
+ break;
+ case 'd':
+ case 'U':
+ case 'G':
+ errx(1, "the -d, -U, and -G options have been removed;"
+ " please use the configuration file instead.");
+ case 'C':
+ serverstart = 0;
+ break;
+ case 'S':
+ clientstart = 0;
+ break;
+ case 'h':
+ usage(progname);
+ exit(0);
+ default:
+ break;
+ }
+
+ if (!serverstart && !clientstart)
+ errx(1, "it is illegal to specify both -C and -S");
+
+ strncat(pipefsdir, "/nfs", sizeof(pipefsdir)-1);
+
+ daemon_init(fg);
+
+ if ((pw = getpwnam(nobodyuser)) == NULL)
+ errx(1, "Could not find user \"%s\"", nobodyuser);
+ nobodyuid = pw->pw_uid;
+
+ if ((gr = getgrnam(nobodygroup)) == NULL)
+ errx(1, "Could not find group \"%s\"", nobodygroup);
+ nobodygid = gr->gr_gid;
+
+#ifdef HAVE_NFS4_SET_DEBUG
+ nfs4_set_debug(verbose, xlog_warn);
+#endif
+ if (conf_path == NULL)
+ conf_path = _PATH_IDMAPDCONF;
+ if (nfs4_init_name_mapping(conf_path))
+ errx(1, "Unable to create name to user id mappings.");
+
+ evbase = event_base_new();
+ if (evbase == NULL)
+ errx(1, "Failed to create event base.");
+
+ if (verbose > 1)
+ xlog_warn("Expiration time is %d seconds.",
+ cache_entry_expiration);
+ if (serverstart) {
+ nfsdret = nfsdopen();
+ if (nfsdret == 0) {
+ ret = flush_nfsd_idmap_cache();
+ if (ret)
+ xlog_err("main: Failed to flush nfsd idmap cache\n: %s", strerror(errno));
+ }
+ }
+
+ if (clientstart) {
+ struct timeval now = {
+ .tv_sec = 0,
+ .tv_usec = 0,
+ };
+
+ if (cache_entry_expiration != DEFAULT_IDMAP_CACHE_EXPIRY) {
+ int timeout_fd, len;
+ char timeout_buf[12];
+ if ((timeout_fd = open(CLIENT_CACHE_TIMEOUT_FILE,
+ O_RDWR)) == -1) {
+ xlog_warn("Unable to open '%s' to set "
+ "client cache expiration time "
+ "to %d seconds\n",
+ CLIENT_CACHE_TIMEOUT_FILE,
+ cache_entry_expiration);
+ } else {
+ len = snprintf(timeout_buf, sizeof(timeout_buf),
+ "%d", cache_entry_expiration);
+ if ((write(timeout_fd, timeout_buf, len)) != len)
+ xlog_warn("Error writing '%s' to "
+ "'%s' to set client "
+ "cache expiration time\n",
+ timeout_buf,
+ CLIENT_CACHE_TIMEOUT_FILE);
+ close(timeout_fd);
+ }
+ }
+
+ inotify_fd = inotify_init1(IN_NONBLOCK);
+ if (inotify_fd == -1) {
+ xlog_err("Unable to initialise inotify_init1: %s\n", strerror(errno));
+ } else {
+ wd = inotify_add_watch(inotify_fd, pipefsdir, IN_CREATE | IN_DELETE);
+ if (wd < 0)
+ xlog_err("Unable to inotify_add_watch(%s): %s\n", pipefsdir, strerror(errno));
+ }
+
+ TAILQ_INIT(&icq);
+
+ signal(SIGINT, sig_die);
+ signal(SIGTERM, sig_die);
+
+ /* These events are persistent */
+ rootdirev = evsignal_new(evbase, SIGUSR1, dirscancb, &icq);
+ if (rootdirev == NULL)
+ errx(1, "Failed to create SIGUSR1 event.");
+ evsignal_add(rootdirev, NULL);
+ clntdirev = evsignal_new(evbase, SIGUSR2, clntscancb, &icq);
+ if (clntdirev == NULL)
+ errx(1, "Failed to create SIGUSR2 event.");
+ evsignal_add(clntdirev, NULL);
+ svrdirev = evsignal_new(evbase, SIGHUP, svrreopen, NULL);
+ if (svrdirev == NULL)
+ errx(1, "Failed to create SIGHUP event.");
+ evsignal_add(svrdirev, NULL);
+ if ( wd >= 0) {
+ inotifyev = event_new(evbase, inotify_fd,
+ EV_READ | EV_PERSIST, dirscancb, &icq);
+ if (inotifyev == NULL)
+ errx(1, "Failed to create inotify read event.");
+ event_add(inotifyev, NULL);
+ }
+
+ /* Fetch current state */
+ /* (Delay till start of event_dispatch to avoid possibly losing
+ * a SIGUSR1 between here and the call to event_dispatch().) */
+ initialize = evtimer_new(evbase, dirscancb, &icq);
+ if (initialize == NULL)
+ errx(1, "Failed to create initialize event.");
+ evtimer_add(initialize, &now);
+ }
+
+ if (nfsdret != 0 && wd < 0)
+ xlog_err("main: Neither NFS client nor NFSd found");
+
+ daemon_ready();
+
+ if (event_base_dispatch(evbase) < 0)
+ xlog_err("main: event_dispatch returns errno %d (%s)",
+ errno, strerror(errno));
+
+ nfs4_term_name_mapping();
+ nfsdclose();
+
+ if (inotifyev)
+ event_free(inotifyev);
+ if (inotify_fd != -1)
+ close(inotify_fd);
+
+ if (initialize)
+ event_free(initialize);
+ if (rootdirev)
+ event_free(rootdirev);
+ if (clntdirev)
+ event_free(clntdirev);
+ if (svrdirev)
+ event_free(svrdirev);
+ event_base_free(evbase);
+
+ return 0;
+}
+
+static void
+flush_inotify(int fd)
+{
+ while (true) {
+ char buf[4096] __attribute__ ((aligned(__alignof__(struct inotify_event))));
+ const struct inotify_event *ev;
+ ssize_t len;
+ char *ptr;
+
+ len = read(fd, buf, sizeof(buf));
+ if (len == -1 && errno == EINTR)
+ continue;
+
+ if (len <= 0)
+ break;
+
+ for (ptr = buf; ptr < buf + len;
+ ptr += sizeof(struct inotify_event) + ev->len) {
+
+ ev = (const struct inotify_event *)ptr;
+ if (verbose > 2)
+ xlog_warn("pipefs inotify: wd=%i, mask=0x%08x, len=%i, name=%s",
+ ev->wd, ev->mask, ev->len, ev->len ? ev->name : "");
+ }
+ }
+}
+
+static void
+dirscancb(int fd, short UNUSED(which), void *data)
+{
+ int nent, i;
+ struct dirent **ents;
+ struct idmap_client *ic, *nextic;
+ char path[PATH_MAX+256]; /* + sizeof(d_name) */
+ struct idmap_clientq *icq = data;
+
+ if (fd != -1)
+ flush_inotify(fd);
+
+ TAILQ_FOREACH(ic, icq, ic_next) {
+ ic->ic_scanned = 0;
+ }
+
+ nent = scandir(pipefsdir, &ents, NULL, alphasort);
+ if (nent == -1) {
+ xlog_warn("dirscancb: scandir(%s): %s", pipefsdir, strerror(errno));
+ return;
+ }
+
+ for (i = 0; i < nent; i++) {
+ if (ents[i]->d_reclen > 4 &&
+ strncmp(ents[i]->d_name, "clnt", 4) == 0) {
+ TAILQ_FOREACH(ic, icq, ic_next)
+ if (strcmp(ents[i]->d_name + 4, ic->ic_clid) == 0)
+ break;
+ if (ic != NULL)
+ goto next;
+
+ if ((ic = calloc(1, sizeof(*ic))) == NULL)
+ goto out;
+ strlcpy(ic->ic_clid, ents[i]->d_name + 4,
+ sizeof(ic->ic_clid));
+ path[0] = '\0';
+ snprintf(path, sizeof(path), "%s/%s",
+ pipefsdir, ents[i]->d_name);
+
+ if ((ic->ic_dirfd = open(path, O_RDONLY, 0)) == -1) {
+ if (verbose > 0)
+ xlog_warn("dirscancb: open(%s): %s", path, strerror(errno));
+ free(ic);
+ goto out;
+ }
+
+ strlcat(path, "/idmap", sizeof(path));
+ strlcpy(ic->ic_path, path, sizeof(ic->ic_path));
+
+ if (nfsopen(ic) == -1) {
+ close(ic->ic_dirfd);
+ free(ic);
+ goto out;
+ }
+
+ if (verbose > 2)
+ xlog_warn("New client: %s", ic->ic_clid);
+
+ ic->ic_id = "Client";
+
+ TAILQ_INSERT_TAIL(icq, ic, ic_next);
+
+ next:
+ ic->ic_scanned = 1;
+ }
+ }
+
+ ic = TAILQ_FIRST(icq);
+ while(ic != NULL) {
+ nextic=TAILQ_NEXT(ic, ic_next);
+ if (!ic->ic_scanned) {
+ if (ic->ic_event)
+ event_free(ic->ic_event);
+ if (ic->ic_fd != -1)
+ close(ic->ic_fd);
+ if (ic->ic_dirfd != -1)
+ close(ic->ic_dirfd);
+ TAILQ_REMOVE(icq, ic, ic_next);
+ if (verbose > 2) {
+ xlog_warn("Stale client: %s", ic->ic_clid);
+ xlog_warn("\t-> closed %s", ic->ic_path);
+ }
+ free(ic);
+ }
+ ic = nextic;
+ }
+
+out:
+ for (i = 0; i < nent; i++)
+ free(ents[i]);
+ free(ents);
+ return;
+}
+
+static void
+svrreopen(int UNUSED(fd), short UNUSED(which), void *UNUSED(data))
+{
+ nfsdreopen();
+}
+
+static void
+clntscancb(int UNUSED(fd), short UNUSED(which), void *data)
+{
+ struct idmap_clientq *icq = data;
+ struct idmap_client *ic, *ic_next;
+
+ for (ic = TAILQ_FIRST(icq); ic != NULL; ic = ic_next) {
+ ic_next = TAILQ_NEXT(ic, ic_next);
+ if (ic->ic_fd == -1 && nfsopen(ic) == -1) {
+ close(ic->ic_dirfd);
+ TAILQ_REMOVE(icq, ic, ic_next);
+ free(ic);
+ }
+ }
+}
+
+static void
+nfsdcb(int UNUSED(fd), short which, void *data)
+{
+ struct idmap_client *ic = data;
+ struct idmap_msg im;
+ u_char buf[IDMAP_MAXMSGSZ + 1];
+ ssize_t len;
+ ssize_t bsiz;
+ char *bp, typebuf[IDMAP_MAXMSGSZ],
+ buf1[IDMAP_MAXMSGSZ], authbuf[IDMAP_MAXMSGSZ], *p;
+ unsigned long tmp;
+
+ if (which != EV_READ)
+ return;
+
+ len = read(ic->ic_fd, buf, sizeof(buf));
+ if (len == 0)
+ /* No upcall to read; not necessarily a problem: */
+ return;
+ if (len < 0) {
+ xlog_warn("nfsdcb: read(%s) failed: errno %d (%s)",
+ ic->ic_path, errno,
+ strerror(errno));
+ nfsdreopen_one(ic);
+ return;
+ }
+
+ /* Get rid of newline and terminate buffer*/
+ buf[len - 1] = '\0';
+ bp = (char *)buf;
+
+ memset(&im, 0, sizeof(im));
+
+ /* Authentication name -- ignored for now*/
+ if (getfield(&bp, authbuf, sizeof(authbuf)) == -1) {
+ xlog_warn("nfsdcb: bad authentication name in upcall\n");
+ return;
+ }
+ if (getfield(&bp, typebuf, sizeof(typebuf)) == -1) {
+ xlog_warn("nfsdcb: bad type in upcall\n");
+ return;
+ }
+ if (verbose > 2)
+ xlog_warn("nfsdcb: authbuf=%s authtype=%s",
+ authbuf, typebuf);
+
+ im.im_type = strcmp(typebuf, "user") == 0 ?
+ IDMAP_TYPE_USER : IDMAP_TYPE_GROUP;
+
+ switch (ic->ic_which) {
+ case IC_NAMEID:
+ im.im_conv = IDMAP_CONV_NAMETOID;
+ if (getfield(&bp, im.im_name, sizeof(im.im_name)) == -1) {
+ xlog_warn("nfsdcb: bad name in upcall\n");
+ return;
+ }
+ break;
+ case IC_IDNAME:
+ im.im_conv = IDMAP_CONV_IDTONAME;
+ if (getfield(&bp, buf1, sizeof(buf1)) == -1) {
+ xlog_warn("nfsdcb: bad id in upcall\n");
+ return;
+ }
+ tmp = strtoul(buf1, (char **)NULL, 10);
+ im.im_id = (u_int32_t)tmp;
+ if ((tmp == ULONG_MAX && errno == ERANGE)
+ || (unsigned long)im.im_id != tmp) {
+ xlog_warn("nfsdcb: id '%s' too big!\n", buf1);
+ return;
+ }
+ break;
+ default:
+ xlog_warn("nfsdcb: Unknown which type %d", ic->ic_which);
+ return;
+ }
+
+ imconv(ic, &im);
+
+ buf[0] = '\0';
+ bp = (char *)buf;
+ bsiz = sizeof(buf);
+
+ /* Authentication name */
+ addfield(&bp, &bsiz, authbuf);
+
+ switch (ic->ic_which) {
+ case IC_NAMEID:
+ /* Type */
+ p = im.im_type == IDMAP_TYPE_USER ? "user" : "group";
+ addfield(&bp, &bsiz, p);
+ /* Name */
+ addfield(&bp, &bsiz, im.im_name);
+ /* expiry */
+ snprintf(buf1, sizeof(buf1), "%" PRId64,
+ (int64_t)time(NULL) + cache_entry_expiration);
+ addfield(&bp, &bsiz, buf1);
+ /* Note that we don't want to write the id if the mapping
+ * failed; instead, by leaving it off, we write a negative
+ * cache entry which will result in an error returned to
+ * the client. We don't want a chown or setacl referring
+ * to an unknown user to result in giving permissions to
+ * "nobody"! */
+ if (im.im_status == IDMAP_STATUS_SUCCESS) {
+ /* ID */
+ snprintf(buf1, sizeof(buf1), "%u", im.im_id);
+ addfield(&bp, &bsiz, buf1);
+
+ }
+ //if (bsiz == sizeof(buf)) /* XXX */
+
+ bp[-1] = '\n';
+
+ break;
+ case IC_IDNAME:
+ /* Type */
+ p = im.im_type == IDMAP_TYPE_USER ? "user" : "group";
+ addfield(&bp, &bsiz, p);
+ /* ID */
+ snprintf(buf1, sizeof(buf1), "%u", im.im_id);
+ addfield(&bp, &bsiz, buf1);
+ /* expiry */
+ snprintf(buf1, sizeof(buf1), "%" PRId64,
+ (int64_t)time(NULL) + cache_entry_expiration);
+ addfield(&bp, &bsiz, buf1);
+ /* Note we're ignoring the status field in this case; we'll
+ * just map to nobody instead. */
+ /* Name */
+ addfield(&bp, &bsiz, im.im_name);
+
+ bp[-1] = '\n';
+
+ break;
+ default:
+ xlog_warn("nfsdcb: Unknown which type %d", ic->ic_which);
+ return;
+ }
+
+ bsiz = sizeof(buf) - bsiz;
+
+ if (atomicio((void*)write, ic->ic_fd, buf, bsiz) != bsiz)
+ xlog_warn("nfsdcb: write(%s) failed: errno %d (%s)",
+ ic->ic_path, errno, strerror(errno));
+}
+
+static void
+imconv(struct idmap_client *ic, struct idmap_msg *im)
+{
+ u_int32_t len;
+
+ switch (im->im_conv) {
+ case IDMAP_CONV_IDTONAME:
+ idtonameres(im);
+ if (verbose > 1)
+ xlog_warn("%s %s: (%s) id \"%d\" -> name \"%s\"",
+ ic->ic_id, ic->ic_clid,
+ im->im_type == IDMAP_TYPE_USER ? "user" : "group",
+ im->im_id, im->im_name);
+ break;
+ case IDMAP_CONV_NAMETOID:
+ len = strnlen(im->im_name, IDMAP_NAMESZ - 1);
+ /* Check for NULL termination just to be careful */
+ if (im->im_name[len+1] != '\0')
+ return;
+ nametoidres(im);
+ if (verbose > 1)
+ xlog_warn("%s %s: (%s) name \"%s\" -> id \"%d\"",
+ ic->ic_id, ic->ic_clid,
+ im->im_type == IDMAP_TYPE_USER ? "user" : "group",
+ im->im_name, im->im_id);
+ break;
+ default:
+ xlog_warn("imconv: Invalid conversion type (%d) in message",
+ im->im_conv);
+ im->im_status |= IDMAP_STATUS_INVALIDMSG;
+ break;
+ }
+}
+
+static void
+nfscb(int UNUSED(fd), short which, void *data)
+{
+ struct idmap_client *ic = data;
+ struct idmap_msg im;
+
+ if (which != EV_READ)
+ return;
+
+ if (atomicio(read, ic->ic_fd, &im, sizeof(im)) != sizeof(im)) {
+ if (verbose > 0)
+ xlog_warn("nfscb: read(%s): %s", ic->ic_path, strerror(errno));
+ return;
+ }
+
+ imconv(ic, &im);
+
+ /* XXX: I don't like ignoring this error in the id->name case,
+ * but we've never returned it, and I need to check that the client
+ * can handle it gracefully before starting to return it now. */
+
+ if (im.im_status == IDMAP_STATUS_LOOKUPFAIL)
+ im.im_status = IDMAP_STATUS_SUCCESS;
+
+ if (atomicio((void*)write, ic->ic_fd, &im, sizeof(im)) != sizeof(im))
+ xlog_warn("nfscb: write(%s): %s", ic->ic_path, strerror(errno));
+}
+
+static void
+nfsdclose_one(struct idmap_client *ic)
+{
+ if (ic->ic_event) {
+ event_free(ic->ic_event);
+ ic->ic_event = NULL;
+ }
+ if (ic->ic_fd != -1) {
+ close(ic->ic_fd);
+ ic->ic_fd = -1;
+ }
+}
+
+static void
+nfsdreopen_one(struct idmap_client *ic)
+{
+ int fd;
+
+ if (verbose > 2)
+ xlog_warn("ReOpening %s", ic->ic_path);
+
+ if ((fd = open(ic->ic_path, O_RDWR, 0)) != -1) {
+ nfsdclose_one(ic);
+
+ ic->ic_fd = fd;
+ ic->ic_event = event_new(evbase, ic->ic_fd, EV_READ | EV_PERSIST, nfsdcb, ic);
+ if (ic->ic_event == NULL) {
+ xlog_warn("nfsdreopen: Failed to create event for '%s'",
+ ic->ic_path);
+ close(ic->ic_fd);
+ ic->ic_fd = -1;
+ return;
+ }
+ event_add(ic->ic_event, NULL);
+ } else {
+ xlog_warn("nfsdreopen: Opening '%s' failed: errno %d (%s)",
+ ic->ic_path, errno, strerror(errno));
+ }
+}
+
+static void
+nfsdreopen(void)
+{
+ nfsdreopen_one(&nfsd_ic[IC_NAMEID]);
+ nfsdreopen_one(&nfsd_ic[IC_IDNAME]);
+ return;
+}
+
+static int
+nfsdopen(void)
+{
+ return ((nfsdopenone(&nfsd_ic[IC_NAMEID]) == 0 &&
+ nfsdopenone(&nfsd_ic[IC_IDNAME]) == 0) ? 0 : -1);
+}
+
+static void
+nfsdclose(void)
+{
+ nfsdclose_one(&nfsd_ic[IC_NAMEID]);
+ nfsdclose_one(&nfsd_ic[IC_IDNAME]);
+}
+
+static int
+nfsdopenone(struct idmap_client *ic)
+{
+ if ((ic->ic_fd = open(ic->ic_path, O_RDWR, 0)) == -1) {
+ if (verbose > 0)
+ xlog_warn("nfsdopenone: Opening %s failed: "
+ "errno %d (%s)",
+ ic->ic_path, errno, strerror(errno));
+ return (-1);
+ }
+
+ ic->ic_event = event_new(evbase, ic->ic_fd, EV_READ | EV_PERSIST, nfsdcb, ic);
+ if (ic->ic_event == NULL) {
+ if (verbose > 0)
+ xlog_warn("nfsdopenone: Create event for %s failed",
+ ic->ic_path);
+ close(ic->ic_fd);
+ ic->ic_fd = -1;
+ return (-1);
+ }
+ event_add(ic->ic_event, NULL);
+
+ if (verbose > 2)
+ xlog_warn("Opened %s", ic->ic_path);
+
+ return (0);
+}
+
+static int
+nfsopen(struct idmap_client *ic)
+{
+ if ((ic->ic_fd = open(ic->ic_path, O_RDWR, 0)) == -1) {
+ if (errno == ENOENT) {
+ char *slash;
+
+ slash = strrchr(ic->ic_path, '/');
+ if (!slash)
+ return -1;
+ *slash = 0;
+ inotify_add_watch(inotify_fd, ic->ic_path, IN_CREATE | IN_ONLYDIR | IN_ONESHOT);
+ *slash = '/';
+ if (verbose > 2)
+ xlog_warn("Path %s not available. waiting...", ic->ic_path);
+ return -1;
+ }
+
+ xlog_warn("nfsopen: open(%s): %s", ic->ic_path, strerror(errno));
+ return (-1);
+ }
+
+ ic->ic_event = event_new(evbase, ic->ic_fd, EV_READ | EV_PERSIST, nfscb, ic);
+ if (ic->ic_event == NULL) {
+ xlog_warn("nfsopen: Create event for %s failed", ic->ic_path);
+ close(ic->ic_fd);
+ ic->ic_fd = -1;
+ return -1;
+ }
+ event_add(ic->ic_event, NULL);
+ if (verbose > 2)
+ xlog_warn("Opened %s", ic->ic_path);
+
+ return (0);
+}
+
+static void
+idtonameres(struct idmap_msg *im)
+{
+ char domain[NFS4_MAX_DOMAIN_LEN];
+ int ret = 0;
+
+ ret = nfs4_get_default_domain(NULL, domain, sizeof(domain));
+ switch (im->im_type) {
+ case IDMAP_TYPE_USER:
+ ret = nfs4_uid_to_name(im->im_id, domain, im->im_name,
+ sizeof(im->im_name));
+ if (ret) {
+ if (strlen(nobodyuser) < sizeof(im->im_name))
+ strcpy(im->im_name, nobodyuser);
+ else
+ strcpy(im->im_name, NFS4NOBODY_USER);
+ }
+ break;
+ case IDMAP_TYPE_GROUP:
+ ret = nfs4_gid_to_name(im->im_id, domain, im->im_name,
+ sizeof(im->im_name));
+ if (ret) {
+ if (strlen(nobodygroup) < sizeof(im->im_name))
+ strcpy(im->im_name, nobodygroup);
+ else
+ strcpy(im->im_name, NFS4NOBODY_GROUP);
+ }
+ break;
+ }
+ if (ret)
+ im->im_status = IDMAP_STATUS_LOOKUPFAIL;
+ else
+ im->im_status = IDMAP_STATUS_SUCCESS;
+}
+
+static void
+nametoidres(struct idmap_msg *im)
+{
+ uid_t uid;
+ gid_t gid;
+ int ret = 0;
+
+ /* XXX: move nobody stuff to library calls
+ * (nfs4_get_nobody_user(domain), nfs4_get_nobody_group(domain)) */
+
+ im->im_status = IDMAP_STATUS_SUCCESS;
+
+ switch (im->im_type) {
+ case IDMAP_TYPE_USER:
+ ret = nfs4_name_to_uid(im->im_name, &uid);
+ im->im_id = (u_int32_t) uid;
+ if (ret) {
+ im->im_status = IDMAP_STATUS_LOOKUPFAIL;
+ im->im_id = nobodyuid;
+ }
+ return;
+ case IDMAP_TYPE_GROUP:
+ ret = nfs4_name_to_gid(im->im_name, &gid);
+ im->im_id = (u_int32_t) gid;
+ if (ret) {
+ im->im_status = IDMAP_STATUS_LOOKUPFAIL;
+ im->im_id = nobodygid;
+ }
+ return;
+ }
+}
+
+static int
+addfield(char **bpp, ssize_t *bsizp, char *fld)
+{
+ char ch, *bp = *bpp;
+ ssize_t bsiz = *bsizp;
+
+ while ((ch = *fld++) != '\0' && bsiz > 0) {
+ switch(ch) {
+ case ' ':
+ case '\t':
+ case '\n':
+ case '\\':
+ if (bsiz >= 4) {
+ bp += snprintf(bp, bsiz, "\\%03o", ch);
+ bsiz -= 4;
+ }
+ break;
+ default:
+ *bp++ = ch;
+ bsiz--;
+ break;
+ }
+ }
+
+ if (bsiz < 1 || ch != '\0')
+ return (-1);
+
+ *bp++ = ' ';
+ bsiz--;
+
+ *bpp = bp;
+ *bsizp = bsiz;
+
+ return (0);
+}
+
+static int
+getfield(char **bpp, char *fld, size_t fldsz)
+{
+ char *bp;
+ unsigned int val;
+ int n;
+
+ while ((bp = strsep(bpp, " ")) != NULL && bp[0] == '\0')
+ ;
+
+ if (bp == NULL || bp[0] == '\0' || bp[0] == '\n')
+ return (-1);
+
+ while (*bp != '\0' && fldsz > 1) {
+ if (*bp == '\\') {
+ if ((n = sscanf(bp, "\\%03o", &val)) != 1)
+ return (-1);
+ if (val > UCHAR_MAX)
+ return (-1);
+ *fld++ = val;
+ bp += 4;
+ } else {
+ *fld++ = *bp;
+ bp++;
+ }
+ fldsz--;
+ }
+
+ if (*bp != '\0')
+ return (-1);
+ *fld = '\0';
+
+ return (0);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-03 22:19:58 +0000