#include <errno.h>
#include <fcntl.h>
#include <sys/mount.h>
+#include <sys/utsname.h>
#include <getopt.h>
#include <mntent.h>
#include <pwd.h>
#include "fstab.h"
#include "xcommon.h"
+#include "nls.h"
#include "mount_constants.h"
#include "nfs_paths.h"
#include "nfs4_mount.h"
#include "nfsumount.h"
#include "mount.h"
+#include "error.h"
+#include "network.h"
char *progname;
+int nfs_mount_data_version;
int nomtab;
int verbose;
-int mounttype;
int sloppy;
static struct option longopts[] = {
{ "read-write", 0, 0, 'w' },
{ "rw", 0, 0, 'w' },
{ "options", 1, 0, 'o' },
- { "nfsvers", 1, 0, 't' },
- { "bind", 0, 0, 128 },
- { "replace", 0, 0, 129 },
- { "after", 0, 0, 130 },
- { "before", 0, 0, 131 },
- { "over", 0, 0, 132 },
- { "move", 0, 0, 133 },
- { "rbind", 0, 0, 135 },
{ NULL, 0, 0, 0 }
};
int mask; /* flag mask value */
};
-/* Custom mount options for our own purposes. */
-#define MS_DUMMY 0x00000000
-#define MS_USERS 0x40000000
-#define MS_USER 0x80000000
-
static const struct opt_map opt_map[] = {
{ "defaults", 0, 0, 0 }, /* default options */
{ "ro", 1, 0, MS_RDONLY }, /* read-only */
{ "rbind", 0, 0, MS_BIND|MS_REC }, /* Idem, plus mounted subtrees */
{ "auto", 0, 0, MS_DUMMY }, /* Can be mounted using -a */
{ "noauto", 0, 0, MS_DUMMY }, /* Can only be mounted explicitly */
- { "users", 1, 0, MS_USERS|MS_NOEXEC|MS_NOSUID|MS_NODEV },
- /* Allow ordinary user to mount */
+ { "users", 1, 0, MS_USERS }, /* Allow ordinary user to mount */
{ "nousers", 0, 1, MS_DUMMY }, /* Forbid ordinary user to mount */
- { "user", 1, 0, MS_USER|MS_NOEXEC|MS_NOSUID|MS_NODEV },
- /* Allow ordinary user to mount */
+ { "user", 1, 0, MS_USER }, /* Allow ordinary user to mount */
{ "nouser", 0, 1, MS_DUMMY }, /* Forbid ordinary user to mount */
{ "owner", 0, 0, MS_DUMMY }, /* Let the owner of the device mount */
{ "noowner", 0, 0, MS_DUMMY }, /* Device owner has no special privs */
{ NULL, 0, 0, 0 }
};
+#define MAKE_VERSION(p,q,r) (65536 * (p) + 256 * (q) + (r))
+
+int linux_version_code(void)
+{
+ struct utsname my_utsname;
+ int p, q, r;
+
+ if (uname(&my_utsname) == 0) {
+ p = atoi(strtok(my_utsname.release, "."));
+ q = atoi(strtok(NULL, "."));
+ r = atoi(strtok(NULL, "."));
+ return MAKE_VERSION(p,q,r);
+ }
+ return 0;
+}
+
+/*
+ * Choose the version of the nfs_mount_data structure that is appropriate
+ * for the kernel that is doing the mount.
+ *
+ * NFS_MOUNT_VERSION: maximum version supported by these sources
+ * nfs_mount_data_version: maximum version supported by the running kernel
+ */
+static void discover_nfs_mount_data_version(void)
+{
+ int kernel_version = linux_version_code();
+
+ if (kernel_version) {
+ if (kernel_version < MAKE_VERSION(2, 1, 32))
+ nfs_mount_data_version = 1;
+ else if (kernel_version < MAKE_VERSION(2, 2, 18))
+ nfs_mount_data_version = 3;
+ else if (kernel_version < MAKE_VERSION(2, 3, 0))
+ nfs_mount_data_version = 4;
+ else if (kernel_version < MAKE_VERSION(2, 3, 99))
+ nfs_mount_data_version = 3;
+ else if (kernel_version < MAKE_VERSION(2, 6, 3))
+ nfs_mount_data_version = 4;
+ else
+ nfs_mount_data_version = 6;
+ }
+ if (nfs_mount_data_version > NFS_MOUNT_VERSION)
+ nfs_mount_data_version = NFS_MOUNT_VERSION;
+}
+
/* Try to build a canonical options string. */
static char * fix_opts_string (int flags, const char *extra_opts) {
const struct opt_map *om;
return new_opts;
}
-
-int add_mtab(char *fsname, char *mount_point, char *fstype, int flags, char *opts, int freq, int passno)
+static int add_mtab(char *spec, char *mount_point, char *fstype,
+ int flags, char *opts, int freq, int pass)
{
struct mntent ment;
FILE *mtab;
+ int result = EX_FILEIO;
- ment.mnt_fsname = fsname;
+ ment.mnt_fsname = spec;
ment.mnt_dir = mount_point;
ment.mnt_type = fstype;
ment.mnt_opts = fix_opts_string(flags, opts);
- ment.mnt_freq = 0;
- ment.mnt_passno= 0;
+ ment.mnt_freq = freq;
+ ment.mnt_passno = pass;
- if(flags & MS_REMOUNT) {
+ if (flags & MS_REMOUNT) {
update_mtab(ment.mnt_dir, &ment);
return 0;
}
lock_mtab();
- if ((mtab = setmntent(MOUNTED, "a+")) == NULL) {
- fprintf(stderr, "Can't open " MOUNTED);
- return 1;
+ if ((mtab = setmntent(MOUNTED, "a+")) == NULL) {
+ unlock_mtab();
+ nfs_error(_("Can't open mtab: %s"),
+ strerror(errno));
+ goto fail_unlock;
}
- if (addmntent(mtab, &ment) == 1) {
- endmntent(mtab);
- unlock_mtab();
- fprintf(stderr, "Can't write mount entry");
- return 1;
+ if (addmntent(mtab, &ment) == 1) {
+ nfs_error(_("Can't write mount entry to mtab: %s"),
+ strerror(errno));
+ goto fail_close;
}
- if (fchmod(fileno(mtab), 0644) == -1) {
- endmntent(mtab);
- unlock_mtab();
- fprintf(stderr, "Can't set perms on " MOUNTED);
- return 1;
+ if (fchmod(fileno(mtab), 0644) == -1) {
+ nfs_error(_("Can't set permissions on mtab: %s"),
+ strerror(errno));
+ goto fail_close;
}
- endmntent(mtab);
+ result = 0;
+fail_close:
+ endmntent(mtab);
+fail_unlock:
unlock_mtab();
- return 0;
-}
-
-int do_mount_syscall(char *spec, char *node, char *type, int flags, void *data)
-{
- return mount(spec, node, type, flags, data);
+ return result;
}
void mount_usage()
{
- printf("usage: %s remotetarget dir [-rvVwfnh] [-t version] [-o nfsoptions]\n", progname);
- printf("options:\n\t-r\t\tMount file system readonly\n");
+ printf("usage: %s remotetarget dir [-rvVwfnh] [-o nfsoptions]\n",
+ progname);
+ printf("options:\n");
+ printf("\t-r\t\tMount file system readonly\n");
printf("\t-v\t\tVerbose\n");
printf("\t-V\t\tPrint version\n");
printf("\t-w\t\tMount file system read-write\n");
- printf("\t-f\t\tFake mount, don't actually mount\n");
+ printf("\t-f\t\tFake mount, do not actually mount\n");
printf("\t-n\t\tDo not update /etc/mtab\n");
printf("\t-s\t\tTolerate sloppy mount options rather than failing.\n");
printf("\t-h\t\tPrint this help\n");
- printf("\tversion\t\tnfs4 - NFS version 4, nfs - older NFS version supported\n");
- printf("\tnfsoptions\tRefer mount.nfs(8) or nfs(5)\n\n");
+ printf("\tnfsoptions\tRefer to mount.nfs(8) or nfs(5)\n\n");
}
static inline void
if (options != NULL) {
char *opts = xstrdup(options);
char *opt, *p;
- int len = strlen(opts);
+ int len = strlen(opts) + 1; /* include room for a null */
int open_quote = 0;
*extra_opts = xmalloc(len);
}
}
-static void mount_error(char *node)
+static int chk_mountpoint(char *mount_point)
{
- switch(errno) {
- case ENOTDIR:
- fprintf(stderr, "%s: mount point %s is not a directory\n", progname, node);
- break;
- case EBUSY:
- fprintf(stderr, "%s: %s is already mounted or busy\n", progname, node);
- break;
- case ENOENT:
- fprintf(stderr, "%s: mount point %s does not exist\n", progname, node);
- break;
- default:
- fprintf(stderr, "%s: %s\n", progname, strerror(errno));
+ struct stat sb;
+
+ if (stat(mount_point, &sb) < 0){
+ mount_error(NULL, mount_point, errno);
+ return 1;
+ }
+ if (S_ISDIR(sb.st_mode) == 0){
+ mount_error(NULL, mount_point, ENOTDIR);
+ return 1;
+ }
+ if (access(mount_point, X_OK) < 0) {
+ mount_error(NULL, mount_point, errno);
+ return 1;
}
-}
-static void start_statd()
-{
- /* If /var/run/rpc.statd.pid exists and is non-empty,
- * assume statd already running.
- * If START_STATD not defined, or defined to a non-existent file,
- * don't bother,
- * else run that file (typically a shell script)
- */
- struct stat stb;
- if (stat("/var/run/rpc.statd.pid", &stb) == 0 &&
- stb.st_size > 0)
- return;
-#ifdef START_STATD
- if (stat(START_STATD, &stb) ==0 &&
- S_ISREG(stb.st_mode) &&
- (stb.st_mode & S_IXUSR))
- system(START_STATD);
-#endif
+ return 0;
}
int main(int argc, char *argv[])
{
- int c, flags = 0, nfs_mount_vers = 0, mnt_err = 1, fake = 0;
- char *spec, *mount_point, *extra_opts = NULL;
- char *mount_opts = NULL, *p;
+ int c, flags = 0, mnt_err = 1, fake = 0;
+ char *spec, *mount_point, *fs_type = "nfs";
+ char *extra_opts = NULL, *mount_opts = NULL;
uid_t uid = getuid();
- progname = argv[0];
- if (!progname)
- exit(2);
+ progname = basename(argv[0]);
- if ((p = strrchr(progname, '/')) != NULL)
- progname = p+1;
+ discover_nfs_mount_data_version();
if(!strncmp(progname, "umount", strlen("umount"))) {
if(argc < 2) {
umount_usage();
exit(1);
}
- exit(nfsumount(argc, argv) ? 0 : 1);
+ exit(nfsumount(argc, argv));
}
if(argv[1] && argv[1][0] == '-') {
mount_point = argv[2];
argv[2] = argv[0]; /* so that getopt error messages are correct */
- while ((c = getopt_long (argc - 2, argv + 2, "rt:vVwfno:hs",
+ while ((c = getopt_long(argc - 2, argv + 2, "rvVwfno:hs",
longopts, NULL)) != -1) {
switch (c) {
case 'r':
flags |= MS_RDONLY;
break;
- case 't':
- if (strcmp(optarg, "nfs4") == 0)
- nfs_mount_vers = 4;
- else if (strcmp(optarg, "nfs") == 0)
- nfs_mount_vers = 0;
- else {
- fprintf(stderr, "%s: unknown filesystem type: %s\n",
- progname, optarg);
- exit(1);
- }
- break;
case 'v':
++verbose;
break;
case 's':
++sloppy;
break;
- case 128: /* bind */
- mounttype = MS_BIND;
- break;
- case 129: /* replace */
- mounttype = MS_REPLACE;
- break;
- case 130: /* after */
- mounttype = MS_AFTER;
- break;
- case 131: /* before */
- mounttype = MS_BEFORE;
- break;
- case 132: /* over */
- mounttype = MS_OVER;
- break;
- case 133: /* move */
- mounttype = MS_MOVE;
- break;
- case 135: /* rbind */
- mounttype = MS_BIND | MS_REC;
- break;
case 'h':
default:
mount_usage();
exit(1);
}
- if (strcmp(progname, "mount.nfsv4") == 0)
- nfs_mount_vers = 4;
+ if (strcmp(progname, "mount.nfs4") == 0)
+ fs_type = "nfs4";
+ /*
+ * If a non-root user is attempting to mount, make sure the
+ * user's requested options match the options specified in
+ * /etc/fstab; otherwise, don't allow the mount.
+ */
if (uid != 0) {
- /* don't even think about it unless options exactly
- * match fstab
- */
struct mntentchn *mc;
if ((mc = getfsfile(mount_point)) == NULL ||
strcmp(mc->m.mnt_fsname, spec) != 0 ||
- strcmp(mc->m.mnt_type, (nfs_mount_vers == 4 ? "nfs4":"nfs")) != 0
- ) {
- fprintf(stderr, "%s: permission died - no match for fstab\n",
- progname);
+ strcmp(mc->m.mnt_type, fs_type) != 0) {
+ fprintf(stderr, "%s: permission denied: no match for %s "
+ "found in /etc/fstab\n", progname, mount_point);
exit(1);
}
- /* 'mount' munges the options from fstab before passing them
+
+ /*
+ * 'mount' munges the options from fstab before passing them
* to us, so it is non-trivial to test that we have the correct
* set of options and we don't want to trust what the user
- * gave us, so just take whatever is in fstab
+ * gave us, so just take whatever is in /etc/fstab.
*/
mount_opts = strdup(mc->m.mnt_opts);
- mounttype = 0;
}
mount_point = canonicalize(mount_point);
}
}
- if (nfs_mount_vers == 4)
- mnt_err = nfs4mount(spec, mount_point, &flags, &extra_opts, &mount_opts, 0);
- else {
- int need_statd = 0;
- mnt_err = nfsmount(spec, mount_point, &flags,
- &extra_opts, &mount_opts,
- 0, &need_statd);
- if (!mnt_err && !fake && need_statd)
- start_statd();
- }
-
- if (mnt_err)
+ if (chk_mountpoint(mount_point))
exit(EX_FAIL);
- if (!fake) {
- mnt_err = do_mount_syscall(spec, mount_point,
- nfs_mount_vers == 4 ? "nfs4" : "nfs",
- flags & ~(MS_USER|MS_USERS) ,
- mount_opts);
+ if (strcmp(fs_type, "nfs4") == 0)
+ mnt_err = nfs4mount(spec, mount_point, flags, &extra_opts, fake);
+ else
+ mnt_err = nfsmount(spec, mount_point, flags, &extra_opts, fake);
- if (mnt_err) {
- mount_error(mount_point);
- exit(EX_FAIL);
- }
- }
+ if (mnt_err)
+ exit(EX_FAIL);
if (!nomtab)
- add_mtab(spec, mount_point,
- nfs_mount_vers == 4 ? "nfs4" : "nfs",
- flags, extra_opts, 0, 0);
+ mnt_err = add_mtab(spec, mount_point, fs_type, flags, extra_opts,
+ 0, 0 /* these are always zero for NFS */ );
- return 0;
+ exit(mnt_err);
}
projects / nfs-utils.git / blobdiff