X-Git-Url: https://git.decadent.org.uk/gitweb/?p=nfs-utils.git;a=blobdiff_plain;f=utils%2Fmount%2Fnfsumount.c;h=3538d88036210ee4f00f6ae67b71f3af226c76a8;hp=02d40ff9d2bcb32457f1414b073cbec16cb4f0b9;hb=2cbf5fd54ec622bbb420fe5f0584b5f5edf7dc72;hpb=dc08c702a6c7f824f317af561f491635ee898a71 diff --git a/utils/mount/nfsumount.c b/utils/mount/nfsumount.c index 02d40ff..3538d88 100644 --- a/utils/mount/nfsumount.c +++ b/utils/mount/nfsumount.c @@ -37,6 +37,7 @@ #include "network.h" #include "parse_opt.h" #include "parse_dev.h" +#include "utils.h" #define MOUNTSFILE "/proc/mounts" #define LINELEN (4096) @@ -138,113 +139,6 @@ static int del_mtab(const char *spec, const char *node) return EX_FILEIO; } -/* - * 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) -{ - 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; - - /* Skip UMNT call for vers=4 mounts */ - if (nfs_pmap.pm_vers == 4) - return EX_SUCCESS; - - *hostname = nfs_umount_hostname(options, *hostname); - if (!*hostname) { - nfs_error(_("%s: out of memory"), progname); - 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. - * - * 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. - */ -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; -} - /* * Detect NFSv4 mounts. * @@ -257,65 +151,51 @@ static int nfs_umount23(const char *devname, char *string) */ static int nfs_umount_is_vers4(const struct mntentchn *mc) { - char buffer[LINELEN], *next; + struct mntentchn *pmc; + struct mount_options *options; int retval; - FILE *f; - - if ((f = fopen(MOUNTSFILE, "r")) == NULL) { - fprintf(stderr, "%s: %s\n", - MOUNTSFILE, strerror(errno)); - return -1; - } 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) + pmc = getprocmntdirbackward(mc->m.mnt_dir, NULL); + if (!pmc) + goto not_found; + + do { + size_t nlen = strlen(pmc->m.mnt_fsname); + + /* + * It's possible the mount location string in /proc/mounts + * ends with a '/'. In this case, if the entry came from + * /etc/mtab, it won't have the trailing '/' so deal with + * it. + */ + while (pmc->m.mnt_fsname[nlen - 1] == '/') + nlen--; + if (strncmp(pmc->m.mnt_fsname, mc->m.mnt_fsname, nlen) != 0) continue; - type = strtok(NULL, " \t"); - if (type == NULL) - continue; - if (strcmp(type, "nfs4") == 0) + if (strcmp(pmc->m.mnt_type, "nfs4") == 0) goto out_nfs4; - flags = strtok(NULL, " \t"); - if (flags == NULL) - continue; - options = po_split(flags); + options = po_split(pmc->m.mnt_opts); if (options != NULL) { unsigned long version; - int rc; - - rc = nfs_nfs_version(options, &version); + int rc = nfs_nfs_version(options, &version); po_destroy(options); if (rc && version == 4) goto out_nfs4; } - goto out_nfs; - } - if (retval == -1) + if (strcmp(pmc->m.mnt_type, "nfs") == 0) + goto out_nfs; + } while ((pmc = getprocmntdirbackward(mc->m.mnt_dir, pmc)) != NULL); + + if (retval == -1) { +not_found: fprintf(stderr, "%s was not found in %s\n", mc->m.mnt_dir, MOUNTSFILE); - -out: - fclose(f); - return retval; + goto out; + } out_nfs4: if (verbose) @@ -327,7 +207,9 @@ out_nfs: if (verbose) fprintf(stderr, "Legacy NFS mount point detected\n"); retval = 0; - goto out; + +out: + return retval; } static struct option umount_longopts[] = @@ -340,17 +222,6 @@ static struct option umount_longopts[] = { NULL, 0, 0, 0 } }; -static void umount_usage(void) -{ - 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[]) { int c, ret;