static int
fuse_mount_sys (const char *mountpoint, char *fsname,
unsigned long mountflags, char *mnt_param, int fd)
{
int ret = -1;
unsigned mounted = 0;
char *mnt_param_mnt = NULL;
char *fstype = "fuse.glusterfs";
char *source = fsname;
ret = asprintf (&mnt_param_mnt,
"%s,fd=%i,rootmode=%o,user_id=%i,group_id=%i",
mnt_param, fd, S_IFDIR, getuid (), getgid ());
if (ret == -1) {
GFFUSE_LOGERR ("Out of memory");
goto out;
}
#ifdef __FreeBSD__
struct iovec *iov = NULL;
int iovlen = 0;
build_iovec (&iov, &iovlen, "fstype", "fusefs", -1);
build_iovec (&iov, &iovlen, "subtype", "glusterfs", -1);
build_iovec (&iov, &iovlen, "fspath", mountpoint, -1);
build_iovec (&iov, &iovlen, "from", "/dev/fuse", -1);
build_iovec (&iov, &iovlen, "volname", source, -1);
build_iovec_argf (&iov, &iovlen, "fd", "%d", fd);
build_iovec_argf (&iov, &iovlen, "user_id", "%d", getuid());
build_iovec_argf (&iov, &iovlen, "group_id", "%d", getgid());
ret = nmount (iov, iovlen, mountflags);
#else
ret = mount (source, mountpoint, fstype, mountflags,
mnt_param_mnt);
#endif /* __FreeBSD__ */
#ifdef GF_LINUX_HOST_OS
if (ret == -1 && errno == ENODEV) {
/* fs subtype support was added by 79c0b2df aka
v2.6.21-3159-g79c0b2d. Probably we have an
older kernel ... */
fstype = "fuse";
ret = asprintf (&source, "glusterfs#%s", fsname);
if (ret == -1) {
GFFUSE_LOGERR ("Out of memory");
goto out;
}
ret = mount (source, mountpoint, fstype, mountflags,
mnt_param_mnt);
}
#endif /* GF_LINUX_HOST_OS */
if (ret == -1)
goto out;
else
mounted = 1;
#ifdef GF_LINUX_HOST_OS
if (geteuid () == 0) {
char *newmnt = fuse_mnt_resolve_path ("fuse", mountpoint);
char *mnt_param_mtab = NULL;
if (!newmnt) {
ret = -1;
goto out;
}
ret = asprintf (&mnt_param_mtab, "%s%s",
mountflags & MS_RDONLY ? "ro," : "",
mnt_param);
if (ret == -1)
GFFUSE_LOGERR ("Out of memory");
else {
ret = fuse_mnt_add_mount ("fuse", source, newmnt,
fstype, mnt_param_mtab);
FREE (mnt_param_mtab);
}
FREE (newmnt);
if (ret == -1) {
GFFUSE_LOGERR ("failed to add mtab entry");
goto out;
}
}
#endif /* GF_LINUX_HOST_OS */
out:
if (ret == -1) {
GFFUSE_LOGERR("ret = -1\n");
if (mounted)
umount2 (mountpoint, 2); /* lazy umount */
}
FREE (mnt_param_mnt);
if (source != fsname)
FREE (source);
return ret;
}
int main(int argc, char *argv[])
{
int ch;
int fd;
int res;
char *origmnt;
char *mnt;
static int unmount = 0;
static int lazy = 0;
static int quiet = 0;
char *devfd;
char *commfd;
int cfd;
const char *opts = "";
static const struct option long_opts[] = {
{"unmount", no_argument, NULL, 'u'},
{"lazy", no_argument, NULL, 'z'},
{"quiet", no_argument, NULL, 'q'},
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'V'},
{0, 0, 0, 0}};
progname = strdup(argv[0]);
if (progname == NULL) {
fprintf(stderr, "%s: failed to allocate memory\n", argv[0]);
exit(1);
}
while ((ch = getopt_long(argc, argv, "hVo:uzq", long_opts,
NULL)) != -1) {
switch (ch) {
case 'h':
usage();
break;
case 'V':
show_version();
break;
case 'o':
opts = optarg;
break;
case 'u':
unmount = 1;
break;
case 'z':
lazy = 1;
break;
case 'q':
quiet = 1;
break;
default:
exit(1);
}
}
if (lazy && !unmount) {
fprintf(stderr, "%s: -z can only be used with -u\n", progname);
exit(1);
}
if (optind >= argc) {
fprintf(stderr, "%s: missing mountpoint argument\n", progname);
exit(1);
} else if (argc > optind + 1) {
fprintf(stderr, "%s: extra arguments after the mountpoint\n",
progname);
exit(1);
}
origmnt = argv[optind];
drop_privs();
mnt = fuse_mnt_resolve_path(progname, origmnt);
if (mnt != NULL) {
res = chdir("/");
if (res == -1) {
fprintf(stderr, "%s: failed to chdir to '/'\n", progname);
exit(1);
}
}
restore_privs();
if (mnt == NULL)
exit(1);
umask(033);
if (unmount) {
if (geteuid() == 0)
res = unmount_fuse(mnt, quiet, lazy);
else {
res = umount2(mnt, lazy ? 2 : 0);
if (res == -1 && !quiet)
fprintf(stderr,
"%s: failed to unmount %s: %s\n",
progname, mnt, strerror(errno));
}
if (res == -1)
exit(1);
return 0;
}
devfd = getenv(FUSE_DEVFD_ENV);
if (devfd == NULL) {
commfd = getenv(FUSE_COMMFD_ENV);
if (commfd == NULL) {
fprintf(stderr, "%s: old style mounting not supported\n",
progname);
exit(1);
}
}
fd = mount_fuse(mnt, opts, devfd);
if (fd == -1)
exit(1);
if (devfd == NULL) {
cfd = atoi(commfd);
res = send_fd(cfd, fd);
if (res == -1)
exit(1);
}
return 0;
}
static int fuse_mount_sys(const char *mnt, struct mount_opts *mo,
const char *mnt_opts)
{
char tmp[128];
const char *devname = "/dev/fuse";
char *source = NULL;
char *type = NULL;
struct stat stbuf;
int fd;
int res;
if (!mnt) {
fprintf(stderr, "fuse: missing mountpoint parameter\n");
return -1;
}
res = stat(mnt, &stbuf);
if (res == -1) {
fprintf(stderr ,"fuse: failed to access mountpoint %s: %s\n",
mnt, strerror(errno));
return -1;
}
if (!mo->nonempty) {
res = fuse_mnt_check_empty("fuse", mnt, stbuf.st_mode,
stbuf.st_size);
if (res == -1)
return -1;
}
if (mo->auto_unmount) {
/* Tell the caller to fallback to fusermount because
auto-unmount does not work otherwise. */
return -2;
}
fd = open(devname, O_RDWR);
if (fd == -1) {
if (errno == ENODEV || errno == ENOENT)
fprintf(stderr, "fuse: device not found, try 'modprobe fuse' first\n");
else
fprintf(stderr, "fuse: failed to open %s: %s\n",
devname, strerror(errno));
return -1;
}
snprintf(tmp, sizeof(tmp), "fd=%i,rootmode=%o,user_id=%i,group_id=%i",
fd, stbuf.st_mode & S_IFMT, getuid(), getgid());
res = fuse_opt_add_opt(&mo->kernel_opts, tmp);
if (res == -1)
goto out_close;
source = malloc((mo->fsname ? strlen(mo->fsname) : 0) +
(mo->subtype ? strlen(mo->subtype) : 0) +
strlen(devname) + 32);
type = malloc((mo->subtype ? strlen(mo->subtype) : 0) + 32);
if (!type || !source) {
fprintf(stderr, "fuse: failed to allocate memory\n");
goto out_close;
}
strcpy(type, mo->blkdev ? "fuseblk" : "fuse");
if (mo->subtype) {
strcat(type, ".");
strcat(type, mo->subtype);
}
strcpy(source,
mo->fsname ? mo->fsname : (mo->subtype ? mo->subtype : devname));
res = mount(source, mnt, type, mo->flags, mo->kernel_opts);
if (res == -1 && errno == ENODEV && mo->subtype) {
/* Probably missing subtype support */
strcpy(type, mo->blkdev ? "fuseblk" : "fuse");
if (mo->fsname) {
if (!mo->blkdev)
sprintf(source, "%s#%s", mo->subtype,
mo->fsname);
} else {
strcpy(source, type);
}
res = mount(source, mnt, type, mo->flags, mo->kernel_opts);
}
if (res == -1) {
/*
* Maybe kernel doesn't support unprivileged mounts, in this
* case try falling back to fusermount
*/
if (errno == EPERM) {
res = -2;
} else {
int errno_save = errno;
if (mo->blkdev && errno == ENODEV &&
!fuse_mnt_check_fuseblk())
fprintf(stderr,
"fuse: 'fuseblk' support missing\n");
else
fprintf(stderr, "fuse: mount failed: %s\n",
strerror(errno_save));
}
goto out_close;
}
#ifndef __NetBSD__
#ifndef IGNORE_MTAB
if (geteuid() == 0) {
char *newmnt = fuse_mnt_resolve_path("fuse", mnt);
res = -1;
if (!newmnt)
goto out_umount;
res = fuse_mnt_add_mount("fuse", source, newmnt, type,
mnt_opts);
free(newmnt);
if (res == -1)
goto out_umount;
}
#endif /* IGNORE_MTAB */
#endif /* __NetBSD__ */
free(type);
free(source);
return fd;
out_umount:
umount2(mnt, 2); /* lazy umount */
out_close:
free(type);
free(source);
close(fd);
return res;
}
static int fuse_mount_sys(const char *mnt, struct mount_opts *mo,
const char *mnt_opts)
{
char tmp[128];
const char *devname = "/dev/fuse";
char *source = NULL;
char *type = NULL;
struct stat stbuf;
int fd;
int res;
if (!mnt) {
fprintf(stderr, "fuse: missing mountpoint\n");
return -1;
}
res = lstat(mnt, &stbuf);
if (res == -1) {
fprintf(stderr ,"fuse: failed to access mountpoint %s: %s\n",
mnt, strerror(errno));
return -1;
}
if (!mo->nonempty) {
res = fuse_mnt_check_empty("fuse", mnt, stbuf.st_mode, stbuf.st_size);
if (res == -1)
return -1;
}
fd = open(devname, O_RDWR);
if (fd == -1) {
if (errno == ENODEV || errno == ENOENT)
fprintf(stderr,
"fuse: device not found, try 'modprobe fuse' first\n");
else
fprintf(stderr, "fuse: failed to open %s: %s\n", devname,
strerror(errno));
return -1;
}
snprintf(tmp, sizeof(tmp), "fd=%i,rootmode=%o,user_id=%i,group_id=%i", fd,
stbuf.st_mode & S_IFMT, getuid(), getgid());
res = fuse_opt_add_opt(&mo->kernel_opts, tmp);
if (res == -1)
goto out_close;
source = malloc((mo->fsname ? strlen(mo->fsname) : 0) +
(mo->subtype ? strlen(mo->subtype) : 0) +
strlen(devname) + 32);
type = malloc((mo->subtype ? strlen(mo->subtype) : 0) + 32);
if (!type || !source) {
fprintf(stderr, "fuse: failed to allocate memory\n");
goto out_close;
}
strcpy(type, mo->blkdev ? "fuseblk" : "fuse");
if (mo->subtype) {
strcat(type, ".");
strcat(type, mo->subtype);
}
strcpy(source,
mo->fsname ? mo->fsname : (mo->subtype ? mo->subtype : devname));
#ifdef __SOLARIS__
res = mount(source, mnt, MS_OPTIONSTR|mo->flags, type, NULL, 0,
mo->kernel_opts, MAX_MNTOPT_STR);
#else
res = mount(source, mnt, type, mo->flags, mo->kernel_opts);
#endif /* __SOLARIS__ */
#ifdef __SOLARIS__
if (res == -1 && errno == EINVAL && mo->subtype) {
#else
if (res == -1 && errno == ENODEV && mo->subtype) {
#endif
/* Probably missing subtype support */
strcpy(type, mo->blkdev ? "fuseblk" : "fuse");
if (mo->fsname) {
if (!mo->blkdev)
sprintf(source, "%s#%s", mo->subtype, mo->fsname);
} else {
strcpy(source, type);
}
#ifdef __SOLARIS__
res = mount(source, mnt, MS_OPTIONSTR|mo->flags, type, NULL, 0,
mo->kernel_opts, MAX_MNTOPT_STR);
#else
res = mount(source, mnt, type, mo->flags, mo->kernel_opts);
#endif /* __SOLARIS__ */
}
if (res == -1) {
/*
* Maybe kernel doesn't support unprivileged mounts, in this
* case try falling back to fusermount
*/
if (errno == EPERM) {
res = -2;
} else {
int errno_save = errno;
if (mo->blkdev && errno == ENODEV && !fuse_mnt_check_fuseblk())
fprintf(stderr, "fuse: 'fuseblk' support missing\n");
else
fprintf(stderr, "fuse: mount failed: %s\n",
strerror(errno_save));
}
goto out_close;
}
#ifndef __SOLARIS__
if (geteuid() == 0) {
char *newmnt = fuse_mnt_resolve_path("fuse", mnt);
res = -1;
if (!newmnt)
goto out_umount;
res = fuse_mnt_add_mount("fuse", source, newmnt, type, mnt_opts);
free(newmnt);
if (res == -1)
goto out_umount;
}
#endif /* __SOLARIS__ */
return fd;
out_umount:
umount2(mnt, 2); /* lazy umount */
out_close:
free(type);
free(source);
close(fd);
return res;
}
static int get_mnt_flag_opts(char **mnt_optsp, int flags)
{
int i;
if (!(flags & MS_RDONLY) && fuse_opt_add_opt(mnt_optsp, "rw") == -1)
return -1;
for (i = 0; mount_flags[i].opt != NULL; i++) {
if (mount_flags[i].on && (flags & mount_flags[i].flag) &&
fuse_opt_add_opt(mnt_optsp, mount_flags[i].opt) == -1)
return -1;
}
return 0;
}
int main(int argc, char *argv[])
{
sigset_t sigset;
int ch;
int fd;
int res;
char *origmnt;
char *mnt;
static int unmount = 0;
static int lazy = 0;
static int quiet = 0;
char *commfd;
int cfd;
const char *opts = "";
static const struct option long_opts[] = {
{"unmount", no_argument, NULL, 'u'},
{"lazy", no_argument, NULL, 'z'},
{"quiet", no_argument, NULL, 'q'},
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'V'},
{0, 0, 0, 0}};
progname = strdup(argv[0]);
if (progname == NULL) {
fprintf(stderr, "%s: failed to allocate memory\n", argv[0]);
exit(1);
}
while ((ch = getopt_long(argc, argv, "hVo:uzq", long_opts,
NULL)) != -1) {
switch (ch) {
case 'h':
usage();
break;
case 'V':
show_version();
break;
case 'o':
opts = optarg;
break;
case 'u':
unmount = 1;
break;
case 'z':
lazy = 1;
break;
case 'q':
quiet = 1;
break;
default:
exit(1);
}
}
if (lazy && !unmount) {
fprintf(stderr, "%s: -z can only be used with -u\n", progname);
exit(1);
}
if (optind >= argc) {
fprintf(stderr, "%s: missing mountpoint argument\n", progname);
exit(1);
} else if (argc > optind + 1) {
fprintf(stderr, "%s: extra arguments after the mountpoint\n",
progname);
exit(1);
}
origmnt = argv[optind];
drop_privs();
mnt = fuse_mnt_resolve_path(progname, origmnt);
if (mnt != NULL) {
res = chdir("/");
if (res == -1) {
fprintf(stderr, "%s: failed to chdir to '/'\n", progname);
exit(1);
}
}
restore_privs();
if (mnt == NULL)
exit(1);
umask(033);
if (unmount)
goto do_unmount;
commfd = getenv(FUSE_COMMFD_ENV);
if (commfd == NULL) {
fprintf(stderr, "%s: old style mounting not supported\n",
progname);
exit(1);
}
fd = mount_fuse(mnt, opts);
if (fd == -1)
exit(1);
cfd = atoi(commfd);
res = send_fd(cfd, fd);
if (res == -1)
exit(1);
close(fd);
if (!auto_unmount)
return 0;
/* Become a daemon and wait for the parent to exit or die.
ie For the control socket to get closed.
btw We don't want to use daemon() function here because
it forks and messes with the file descriptors. */
setsid();
res = chdir("/");
if (res == -1) {
fprintf(stderr, "%s: failed to chdir to '/'\n", progname);
exit(1);
}
sigfillset(&sigset);
sigprocmask(SIG_BLOCK, &sigset, NULL);
lazy = 1;
quiet = 1;
while (1) {
unsigned char buf[16];
int n = recv(cfd, buf, sizeof(buf), 0);
if (!n)
break;
if (n < 0) {
if (errno == EINTR)
continue;
break;
}
}
do_unmount:
if (geteuid() == 0)
res = unmount_fuse(mnt, quiet, lazy);
else {
res = umount2(mnt, lazy ? UMOUNT_DETACH : 0);
if (res == -1 && !quiet)
fprintf(stderr,
"%s: failed to unmount %s: %s\n",
progname, mnt, strerror(errno));
}
if (res == -1)
exit(1);
return 0;
}
