#include "nls.h"
#include "mount_constants.h"
+#include "nfs_mount.h"
#include "mount.h"
#include "error.h"
#include "network.h"
#include "parse_opt.h"
#include "parse_dev.h"
+#define MOUNTSFILE "/proc/mounts"
+#define LINELEN (4096)
+
#if !defined(MNT_FORCE)
/* dare not try to include <linux/mount.h> -- lots of errors */
#define MNT_FORCE 1
res = try_remount(spec, node);
if (res)
goto writemtab;
- return 0;
+ return EX_SUCCESS;
} else
umnt_err = errno;
}
}
if (res >= 0)
- return 0;
+ return EX_SUCCESS;
if (umnt_err)
umount_error(umnt_err, node);
static int nfs_umount_do_umnt(struct mount_options *options,
char **hostname, char **dirname)
{
- struct sockaddr_storage address;
- struct sockaddr *sap = (struct sockaddr *)&address;
+ union {
+ struct sockaddr sa;
+ struct sockaddr_in s4;
+ struct sockaddr_in6 s6;
+ } address;
+ struct sockaddr *sap = &address.sa;
socklen_t salen = sizeof(address);
struct pmap nfs_pmap, mnt_pmap;
+ sa_family_t family;
+
+ if (!nfs_options2pmap(options, &nfs_pmap, &mnt_pmap))
+ return EX_FAIL;
- nfs_options2pmap(options, &nfs_pmap, &mnt_pmap);
+ /* Skip UMNT call for vers=4 mounts */
+ if (nfs_pmap.pm_vers == 4)
+ return EX_SUCCESS;
*hostname = nfs_umount_hostname(options, *hostname);
if (!*hostname) {
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;
+ if (!nfs_mount_proto_family(options, &family))
+ return 0;
+ if (!nfs_lookup(*hostname, family, sap, &salen))
+ /* nfs_lookup reports any errors */
+ return EX_FAIL;
+
+ if (nfs_advise_umount(sap, salen, &mnt_pmap, dirname) == 0)
+ /* nfs_advise_umount reports any errors */
+ return EX_FAIL;
+
+ return EX_SUCCESS;
}
/*
}
/*
- * 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.
+ * Detect NFSv4 mounts.
*
- * 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.
+ * Consult /proc/mounts to determine if the mount point
+ * is an NFSv4 mount. The kernel is authoritative about
+ * what type of mount this is.
+ *
+ * Returns 1 if "mc" is an NFSv4 mount, zero if not, and
+ * -1 if some error occurred.
*/
-static int do_nfs_umount23(const char *spec, char *opts)
+static int nfs_umount_is_vers4(const struct mntentchn *mc)
{
- char *hostname;
- char *dirname;
- clnt_addr_t mnt_server = { &hostname, };
- 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;
-
-#ifdef NFS_MOUNT_DEBUG
- printf(_("host: %s, directory: %s\n"), hostname, dirname);
-#endif
-
- if (opts && (p = strstr(opts, "addr="))) {
- char *q;
-
- free(hostname);
- p += 5;
- q = p;
- while (*q && *q != ',') q++;
- hostname = xstrndup(p,q-p);
+ char buffer[LINELEN], *next;
+ int retval;
+ FILE *f;
+
+ if ((f = fopen(MOUNTSFILE, "r")) == NULL) {
+ fprintf(stderr, "%s: %s\n",
+ MOUNTSFILE, strerror(errno));
+ return -1;
}
- if (opts && (p = strstr(opts, "mounthost="))) {
- char *q;
-
- free(hostname);
- p += 10;
- q = p;
- while (*q && *q != ',') q++;
- hostname = xstrndup(p,q-p);
- }
+ retval = -1;
+ while (fgets(buffer, sizeof(buffer), f) != NULL) {
+ char *device, *mntdir, *type, *flags;
+ struct mount_options *options;
+ char *line = buffer;
+
+ next = strchr(line, '\n');
+ if (next != NULL)
+ *next = '\0';
+
+ device = strtok(line, " \t");
+ if (device == NULL)
+ continue;
+ mntdir = strtok(NULL, " \t");
+ if (mntdir == NULL)
+ continue;
+ if (strcmp(device, mc->m.mnt_fsname) != 0 &&
+ strcmp(mntdir, mc->m.mnt_dir) != 0)
+ continue;
+
+ type = strtok(NULL, " \t");
+ if (type == NULL)
+ continue;
+ if (strcmp(type, "nfs4") == 0)
+ goto out_nfs4;
+
+ flags = strtok(NULL, " \t");
+ if (flags == NULL)
+ continue;
+ options = po_split(flags);
+ if (options != NULL) {
+ unsigned long version;
+ int rc;
+
+ rc = nfs_nfs_version(options, &version);
+ po_destroy(options);
+ if (rc && version == 4)
+ goto out_nfs4;
+ }
- pmap->pm_prog = MOUNTPROG;
- 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_port = atoi(p+10);
- if (opts && hasmntopt(&mnt, "v2"))
- pmap->pm_vers = nfsvers_to_mnt(2);
- if (opts && hasmntopt(&mnt, "v3"))
- pmap->pm_vers = nfsvers_to_mnt(3);
- 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")
- || 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;
+ goto out_nfs;
}
-
- if (!nfs_call_umount(&mnt_server, &dirname)) {
- nfs_error(_("%s: Server failed to unmount '%s'"),
- progname, spec);
- result = EX_FAIL;
- goto out;
- }
-
- result = EX_SUCCESS;
+ if (retval == -1)
+ fprintf(stderr, "%s was not found in %s\n",
+ mc->m.mnt_dir, MOUNTSFILE);
out:
- free(hostname);
- free(dirname);
- return result;
+ fclose(f);
+ return retval;
+
+out_nfs4:
+ if (verbose)
+ fprintf(stderr, "NFSv4 mount point detected\n");
+ retval = 1;
+ goto out;
+
+out_nfs:
+ if (verbose)
+ fprintf(stderr, "Legacy NFS mount point detected\n");
+ retval = 0;
+ goto out;
}
static struct option umount_longopts[] =
char *opt = hasmntopt(&mc->m, "user");
struct passwd *pw;
char *comma;
- int len;
+ size_t len;
if (!opt)
goto only_root;
if (opt[4] != '=')
}
}
- ret = 0;
+ ret = EX_SUCCESS;
if (mc) {
- 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;
+ if (!lazy) {
+ switch (nfs_umount_is_vers4(mc)) {
+ case 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);
+ break;
+ case 1:
+ break;
+ default:
+ return EX_FAIL;
+ }
+ }
+ ret = del_mtab(mc->m.mnt_fsname, mc->m.mnt_dir);
} else if (*spec != '/') {
if (!lazy)
ret = nfs_umount23(spec, "tcp,v3");
projects / nfs-utils.git / blobdiff