#include "xcommon.h"
#include "fstab.h"
#include "nls.h"
-#include "conn.h"
#include "mount_constants.h"
#include "mount.h"
-#include "nfsumount.h"
#include "error.h"
#include "network.h"
+#include "parse_opt.h"
+#include "parse_dev.h"
#if !defined(MNT_FORCE)
/* dare not try to include <linux/mount.h> -- lots of errors */
int lazy;
int remount;
-static inline enum clnt_stat
-nfs_umount(dirpath *argp, CLIENT *clnt)
-{
- return clnt_call(clnt, MOUNTPROC_UMNT,
- (xdrproc_t) xdr_dirpath, (caddr_t)argp,
- (xdrproc_t) xdr_void, NULL,
- TIMEOUT);
-}
-int nfs_call_umount(clnt_addr_t *mnt_server, dirpath *argp)
+static int try_remount(const char *spec, const char *node)
{
- CLIENT *clnt;
- enum clnt_stat res = 0;
- int msock;
-
- switch (mnt_server->pmap.pm_vers) {
- case 3:
- case 2:
- case 1:
- if (!probe_mntport(mnt_server))
- goto out_bad;
- clnt = mnt_openclnt(mnt_server, &msock);
- if (!clnt)
- goto out_bad;
- res = nfs_umount(argp, clnt);
- mnt_closeclnt(clnt, msock);
- if (res == RPC_SUCCESS)
- return 1;
- break;
- default:
- res = 1;
- break;
+ int res;
+
+ res = mount(spec, node, NULL,
+ MS_MGC_VAL | MS_REMOUNT | MS_RDONLY, NULL);
+ if (res == 0) {
+ struct mntent remnt;
+ nfs_error(_("%s: %s busy - remounted read-only"),
+ progname, spec);
+ remnt.mnt_type = remnt.mnt_fsname = NULL;
+ remnt.mnt_dir = xstrdup(node);
+ remnt.mnt_opts = xstrdup("ro");
+ if (!nomtab)
+ update_mtab(node, &remnt);
+ } else if (errno != EBUSY) { /* hmm ... */
+ perror(_("remount"));
+ nfs_error(_("%s: could not remount %s read-only"),
+ progname, spec);
}
- out_bad:
return res;
}
-int del_mtab(const char *spec, const char *node)
+static int del_mtab(const char *spec, const char *node)
{
int umnt_err, res;
- umnt_err = 0;
- if (lazy) {
- res = umount2 (node, MNT_DETACH);
- if (res < 0)
- umnt_err = errno;
- goto writemtab;
- }
-
- if (force) {
- res = umount2 (node, MNT_FORCE);
- if (res == -1) {
- int errsv = errno;
- perror("umount2");
- errno = errsv;
- if (errno == ENOSYS) {
- if (verbose)
- printf(_("no umount2, trying umount...\n"));
- res = umount (node);
- }
- }
- } else
- res = umount (node);
-
- if (res < 0 && remount && errno == EBUSY && spec) {
- /* Umount failed - let us try a remount */
- res = mount(spec, node, NULL,
- MS_MGC_VAL | MS_REMOUNT | MS_RDONLY, NULL);
- if (res == 0) {
- struct mntent remnt;
- nfs_error(_("%s: %s busy - remounted read-only"),
- progname, spec);
- remnt.mnt_type = remnt.mnt_fsname = NULL;
- remnt.mnt_dir = xstrdup(node);
- remnt.mnt_opts = xstrdup("ro");
- if (!nomtab)
- update_mtab(node, &remnt);
- return 0;
- } else if (errno != EBUSY) { /* hmm ... */
- perror("remount");
- nfs_error(_("%s: could not remount %s read-only"),
- progname, spec);
- }
- }
-
- if (res >= 0) {
- /* Umount succeeded */
- if (verbose)
- printf (_("%s umounted\n"), spec ? spec : node);
- }
+ umnt_err = 0;
+ if (lazy) {
+ res = umount2 (node, MNT_DETACH);
+ if (res < 0)
+ umnt_err = errno;
+ goto writemtab;
+ }
+
+ if (force) {
+ res = umount2 (node, MNT_FORCE);
+ if (res == -1) {
+ int errsv = errno;
+ perror(_("umount2"));
+ errno = errsv;
+ if (errno == ENOSYS) {
+ if (verbose)
+ printf(_("no umount2, trying umount...\n"));
+ res = umount (node);
+ }
+ }
+ } else
+ res = umount (node);
+
+ if (res < 0) {
+ if (remount && errno == EBUSY && spec) {
+ res = try_remount(spec, node);
+ if (res)
+ goto writemtab;
+ return 0;
+ } else
+ umnt_err = errno;
+ }
+
+ if (res >= 0) {
+ /* Umount succeeded */
+ if (verbose)
+ printf(_("%s umounted\n"), spec ? spec : node);
+ }
writemtab:
- if (!nomtab &&
- (umnt_err == 0 || umnt_err == EINVAL || umnt_err == ENOENT)) {
- update_mtab(node, NULL);
- }
+ if (!nomtab &&
+ (umnt_err == 0 || umnt_err == EINVAL || umnt_err == ENOENT)) {
+ update_mtab(node, NULL);
+ }
- if (res >= 0)
- return 0;
+ if (res >= 0)
+ return 0;
- if (umnt_err)
- umount_error(umnt_err, node);
- return EX_FILEIO;
+ if (umnt_err)
+ umount_error(umnt_err, node);
+ return EX_FILEIO;
}
/*
- * Returns 1 if everything went well, else 0.
+ * Discover mount server's hostname/address by examining mount options
+ *
+ * Returns a pointer to a string that the caller must free, on
+ * success; otherwise NULL is returned.
+ */
+static char *nfs_umount_hostname(struct mount_options *options,
+ char *hostname)
+{
+ char *option;
+
+ option = po_get(options, "mountaddr");
+ if (option)
+ goto out;
+ option = po_get(options, "mounthost");
+ if (option)
+ goto out;
+ option = po_get(options, "addr");
+ if (option)
+ goto out;
+
+ return hostname;
+
+out:
+ free(hostname);
+ return strdup(option);
+}
+
+/*
+ * Returns EX_SUCCESS if mount options and device name have been
+ * parsed successfully; otherwise EX_FAIL.
+ */
+static int nfs_umount_do_umnt(struct mount_options *options,
+ char **hostname, char **dirname)
+{
+ struct sockaddr_storage address;
+ struct sockaddr *sap = (struct sockaddr *)&address;
+ socklen_t salen = sizeof(address);
+ struct pmap nfs_pmap, mnt_pmap;
+
+ nfs_options2pmap(options, &nfs_pmap, &mnt_pmap);
+
+ *hostname = nfs_umount_hostname(options, *hostname);
+ if (!*hostname) {
+ nfs_error(_("%s: out of memory"), progname);
+ return EX_FAIL;
+ }
+
+ if (nfs_name_to_address(*hostname, AF_UNSPEC, sap, &salen)) {
+ if (nfs_advise_umount(sap, salen, &mnt_pmap, dirname) != 0)
+ return EX_SUCCESS;
+ else
+ nfs_error(_("%s: Server failed to unmount '%s:%s'"),
+ progname, *hostname, *dirname);
+ }
+ return EX_FAIL;
+}
+
+/*
+ * Pick up certain mount options used during the original mount
+ * from /etc/mtab. The basics include the server's IP address and
+ * the server pathname of the share to unregister.
+ *
+ * These options might also describe the mount port, mount protocol
+ * version, and transport protocol used to punch through a firewall.
+ * We will need this information to get through the firewall again
+ * to do the umount.
+ *
+ * Note that option parsing failures won't necessarily cause the
+ * umount request to fail. Those values will be left zero in the
+ * pmap tuple. If the GETPORT call later fails to disambiguate them,
+ * then we fail.
*/
-int _nfsumount(const char *spec, char *opts)
+static int nfs_umount23(const char *devname, char *string)
+{
+ char *hostname, *dirname;
+ struct mount_options *options;
+ int result = EX_FAIL;
+
+ if (!nfs_parse_devname(devname, &hostname, &dirname))
+ return EX_USAGE;
+
+ options = po_split(string);
+ if (options) {
+ result = nfs_umount_do_umnt(options, &hostname, &dirname);
+ po_destroy(options);
+ } else
+ nfs_error(_("%s: option parsing error"), progname);
+
+ free(hostname);
+ free(dirname);
+ return result;
+}
+
+/*
+ * Pick up certain mount options used during the original mount
+ * from /etc/mtab. The basics include the server's IP address and
+ * the server pathname of the share to unregister.
+ *
+ * These options might also describe the mount port, mount protocol
+ * version, and transport protocol used to punch through a firewall.
+ * We will need this information to get through the firewall again
+ * to do the umount.
+ */
+static int do_nfs_umount23(const char *spec, char *opts)
{
char *hostname;
char *dirname;
struct mntent mnt = { .mnt_opts = opts };
struct pmap *pmap = &mnt_server.pmap;
char *p;
+ int result = EX_USAGE;
+
+ if (!nfs_parse_devname(spec, &hostname, &dirname))
+ return result;
- if (spec == NULL || (p = strchr(spec,':')) == NULL)
- goto out_bad;
- hostname = xstrndup(spec, p-spec);
- dirname = xstrdup(p+1);
#ifdef NFS_MOUNT_DEBUG
printf(_("host: %s, directory: %s\n"), hostname, dirname);
#endif
}
pmap->pm_prog = MOUNTPROG;
- pmap->pm_vers = MOUNTVERS_NFSV3;
- pmap->pm_prot = IPPROTO_TCP;
+ pmap->pm_vers = 0; /* unknown */
if (opts && (p = strstr(opts, "mountprog=")) && isdigit(*(p+10)))
pmap->pm_prog = atoi(p+10);
if (opts && (p = strstr(opts, "mountport=")) && isdigit(*(p+10)))
pmap->pm_vers = nfsvers_to_mnt(2);
if (opts && hasmntopt(&mnt, "v3"))
pmap->pm_vers = nfsvers_to_mnt(3);
- if (opts && hasmntopt(&mnt, "v4"))
- pmap->pm_vers = nfsvers_to_mnt(4);
if (opts && (p = strstr(opts, "vers=")) && isdigit(*(p+5)))
pmap->pm_vers = nfsvers_to_mnt(atoi(p+5));
if (opts && (p = strstr(opts, "mountvers=")) && isdigit(*(p+10)))
pmap->pm_vers = atoi(p+10);
- if (opts && (hasmntopt(&mnt, "udp") || hasmntopt(&mnt, "proto=udp")))
+ if (opts && (hasmntopt(&mnt, "udp")
+ || hasmntopt(&mnt, "proto=udp")
+ || hasmntopt(&mnt, "mountproto=udp")
+ ))
pmap->pm_prot = IPPROTO_UDP;
+ if (opts && (hasmntopt(&mnt, "tcp")
+ || hasmntopt(&mnt, "proto=tcp")
+ || hasmntopt(&mnt, "mountproto=tcp")
+ ))
+ pmap->pm_prot = IPPROTO_TCP;
+
+ if (!nfs_gethostbyname(hostname, &mnt_server.saddr)) {
+ nfs_error(_("%s: DNS resolution of '%s' failed"),
+ progname, hostname);
+ goto out;
+ }
+
+ if (!nfs_call_umount(&mnt_server, &dirname)) {
+ nfs_error(_("%s: Server failed to unmount '%s'"),
+ progname, spec);
+ result = EX_FAIL;
+ goto out;
+ }
- if (!nfs_gethostbyname(hostname, &mnt_server.saddr))
- goto out_bad;
- return nfs_call_umount(&mnt_server, &dirname);
- out_bad:
- nfs_error(_("%s: %s: not found or not mounted"), progname, spec);
- return 0;
+ result = EX_SUCCESS;
+
+out:
+ free(hostname);
+ free(dirname);
+ return result;
}
static struct option umount_longopts[] =
{ NULL, 0, 0, 0 }
};
-void umount_usage()
+static void umount_usage(void)
{
- printf("usage: %s dir [-fvnrlh]\n", progname);
- printf("options:\n\t-f\t\tforce unmount\n");
- printf("\t-v\t\tverbose\n");
- printf("\t-n\t\tDo not update /etc/mtab\n");
- printf("\t-r\t\tremount\n");
- printf("\t-l\t\tlazy unmount\n");
- printf("\t-h\t\tprint this help\n\n");
+ printf(_("usage: %s dir [-fvnrlh]\n"), progname);
+ printf(_("options:\n\t-f\t\tforce unmount\n"));
+ printf(_("\t-v\tverbose\n"));
+ printf(_("\t-n\tDo not update /etc/mtab\n"));
+ printf(_("\t-r\tremount\n"));
+ printf(_("\t-l\tlazy unmount\n"));
+ printf(_("\t-h\tprint this help\n\n"));
}
int nfsumount(int argc, char *argv[])
char *spec;
struct mntentchn *mc;
+ if (argc < 2) {
+ umount_usage();
+ return EX_USAGE;
+ }
+
spec = argv[1];
argv += 1;
case 'h':
default:
umount_usage();
- return 0;
+ return EX_USAGE;
}
}
if (optind != argc) {
umount_usage();
- return 0;
+ return EX_USAGE;
}
if (spec == NULL || (*spec != '/' && strchr(spec,':') == NULL)) {
- printf(_("umount: %s: not found\n"), spec);
- return 0;
+ nfs_error(_("%s: %s: not found\n"), progname, spec);
+ return EX_USAGE;
}
if (*spec == '/')
if (mc && strcmp(mc->m.mnt_type, "nfs") != 0 &&
strcmp(mc->m.mnt_type, "nfs4") != 0) {
- nfs_error(_("%s: %s on %s it not an nfs filesystem"),
+ nfs_error(_("%s: %s on %s is not an NFS filesystem"),
progname, mc->m.mnt_fsname, mc->m.mnt_dir);
return EX_USAGE;
}
/* umount might call us twice. The second time there will
* be no entry in mtab and we should just exit quietly
*/
- return 0;
+ return EX_SUCCESS;
only_root:
nfs_error(_("%s: You are not permitted to unmount %s"),
progname, spec);
- return 0;
+ return EX_USAGE;
}
if (hasmntopt(&mc->m, "users") == NULL) {
char *opt = hasmntopt(&mc->m, "user");
ret = 0;
if (mc) {
- if (!lazy)
- _nfsumount(mc->m.mnt_fsname, mc->m.mnt_opts);
- ret = del_mtab(mc->m.mnt_fsname, mc->m.mnt_dir);
+ if (!lazy && strcmp(mc->m.mnt_type, "nfs4") != 0)
+ /* We ignore the error from nfs_umount23.
+ * If the actual umount succeeds (in del_mtab),
+ * we don't want to signal an error, as that
+ * could cause /sbin/mount to retry!
+ */
+ nfs_umount23(mc->m.mnt_fsname, mc->m.mnt_opts);
+ ret = del_mtab(mc->m.mnt_fsname, mc->m.mnt_dir) ?: ret;
} else if (*spec != '/') {
if (!lazy)
- _nfsumount(spec, "tcp,v3");
+ ret = nfs_umount23(spec, "tcp,v3");
} else
ret = del_mtab(NULL, spec);
return ret;
}
-
projects / nfs-utils.git / blobdiff