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-rw-r--r--contrib/fuse-lib/mount.c174
1 files changed, 156 insertions, 18 deletions
diff --git a/contrib/fuse-lib/mount.c b/contrib/fuse-lib/mount.c
index 1edde86014a..06ff191f542 100644
--- a/contrib/fuse-lib/mount.c
+++ b/contrib/fuse-lib/mount.c
@@ -52,12 +52,16 @@ gf_fuse_unmount (const char *mountpoint, int fd)
if (geteuid () == 0) {
fuse_mnt_umount ("fuse", mountpoint, mountpoint, 1);
return;
+ } else {
+ GFFUSE_LOGERR ("fuse: Effective-uid: %d", geteuid());
}
res = umount2 (mountpoint, 2);
if (res == 0)
return;
+ GFFUSE_LOGERR ("fuse: failed to unmount %s: %s",
+ mountpoint, strerror (errno));
pid = fork ();
if (pid == -1)
return;
@@ -67,6 +71,8 @@ gf_fuse_unmount (const char *mountpoint, int fd)
"--", mountpoint, NULL };
execvp (FUSERMOUNT_PROG, (char **)argv);
+ GFFUSE_LOGERR ("fuse: failed to execute fuserumount: %s",
+ strerror (errno));
_exit (1);
}
waitpid (pid, NULL, 0);
@@ -75,6 +81,54 @@ gf_fuse_unmount (const char *mountpoint, int fd)
/* gluster-specific routines */
+/* Unmounting in a daemon that lurks 'till main process exits */
+int
+gf_fuse_unmount_daemon (const char *mountpoint, int fd)
+{
+ int ret = -1;
+ pid_t pid = -1;
+
+ if (fd == -1)
+ return -1;
+
+ int ump[2] = {0,};
+
+ ret = pipe(ump);
+ if (ret == -1) {
+ close (fd);
+ return -1;
+ }
+
+ pid = fork ();
+ switch (pid) {
+ case 0:
+ {
+ char c = 0;
+ sigset_t sigset;
+
+ close_fds_except (ump, 1);
+
+ setsid();
+ (void)chdir("/");
+ sigfillset(&sigset);
+ sigprocmask(SIG_BLOCK, &sigset, NULL);
+
+ read (ump[0], &c, 1);
+
+ gf_fuse_unmount (mountpoint, fd);
+ exit (0);
+ }
+ case -1:
+ close (fd);
+ fd = -1;
+ ret = -1;
+ close (ump[1]);
+ }
+ close (ump[0]);
+
+ return ret;
+}
+
static char *
escape (char *s)
{
@@ -106,8 +160,7 @@ escape (char *s)
static int
fuse_mount_fusermount (const char *mountpoint, char *fsname,
- unsigned long mountflags, char *mnt_param,
- int fd)
+ char *mnt_param, int fd)
{
int pid = -1;
int res = 0;
@@ -130,8 +183,7 @@ fuse_mount_fusermount (const char *mountpoint, char *fsname,
return -1;
}
ret = asprintf (&fm_mnt_params,
- "%s%s,fsname=%s,nonempty,subtype=glusterfs",
- (mountflags & MS_RDONLY) ? "ro," : "",
+ "%s,fsname=%s,nonempty,subtype=glusterfs",
mnt_param, efsname);
FREE (efsname);
if (ret == -1) {
@@ -224,19 +276,101 @@ build_iovec_argf(struct iovec **iov, int *iovlen, const char *name,
}
#endif /* __FreeBSD__ */
+struct mount_flags {
+ const char *opt;
+ mount_flag_t flag;
+ int on;
+} mount_flags[] = {
+ /* We provide best effort cross platform support for mount flags by
+ * defining the ones which are commonly used in Unix-like OS-es.
+ */
+ {"ro", MS_RDONLY, 1},
+ {"nosuid", MS_NOSUID, 1},
+ {"nodev", MS_NODEV, 1},
+ {"noatime", MS_NOATIME, 1},
+ {"noexec", MS_NOEXEC, 1},
+#ifdef GF_LINUX_HOST_OS
+ {"rw", MS_RDONLY, 0},
+ {"suid", MS_NOSUID, 0},
+ {"dev", MS_NODEV, 0},
+ {"exec", MS_NOEXEC, 0},
+ {"async", MS_SYNCHRONOUS, 0},
+ {"sync", MS_SYNCHRONOUS, 1},
+ {"atime", MS_NOATIME, 0},
+ {"dirsync", MS_DIRSYNC, 1},
+#endif
+ {NULL, 0, 0}
+};
+
+static int
+mount_param_to_flag (char *mnt_param, mount_flag_t *mntflags,
+ char **mnt_param_new)
+{
+ gf_boolean_t found = _gf_false;
+ struct mount_flags *flag = NULL;
+ char *param_tok = NULL;
+ token_iter_t tit = {0,};
+ gf_boolean_t iter_end = _gf_false;
+
+ /* Allocate a buffer that will hold the mount parameters remaining
+ * after the ones corresponding to mount flags are processed and
+ * removed.The length of the original params are a good upper bound
+ * of the size needed.
+ */
+ *mnt_param_new = strdup (mnt_param);
+ if (!*mnt_param_new)
+ return -1;
+
+ for (param_tok = token_iter_init (*mnt_param_new, ',', &tit) ;;) {
+ iter_end = next_token (&param_tok, &tit);
+
+ found = _gf_false;
+ for (flag = mount_flags; flag->opt; flag++) {
+ /* Compare the mount flag name to the param
+ * name at hand.
+ */
+ if (strcmp (flag->opt, param_tok) == 0) {
+ /* If there is a match, adjust mntflags
+ * accordingly and break.
+ */
+ if (flag->on) {
+ *mntflags |= flag->flag;
+ } else {
+ *mntflags &= ~flag->flag;
+ }
+ found = _gf_true;
+ break;
+ }
+ }
+ /* Exclude flag names from new parameter list. */
+ if (found)
+ drop_token (param_tok, &tit);
+
+ if (iter_end)
+ break;
+ }
+
+ return 0;
+}
+
static int
fuse_mount_sys (const char *mountpoint, char *fsname,
- unsigned long mountflags, char *mnt_param, int fd)
+ 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 ());
+ mount_flag_t mountflags = 0;
+ char *mnt_param_new = NULL;
+
+ ret = mount_param_to_flag (mnt_param, &mountflags, &mnt_param_new);
+ if (ret == 0)
+ ret = asprintf (&mnt_param_mnt,
+ "%s,fd=%i,rootmode=%o,user_id=%i,group_id=%i",
+ mnt_param_new, fd, S_IFDIR, getuid (),
+ getgid ());
if (ret == -1) {
GFFUSE_LOGERR ("Out of memory");
@@ -256,6 +390,7 @@ fuse_mount_sys (const char *mountpoint, char *fsname,
build_iovec (&iov, &iovlen, "from", "/dev/fuse", -1);
build_iovec (&iov, &iovlen, "volname", source, -1);
build_iovec (&iov, &iovlen, "fd", fdstr, -1);
+ build_iovec (&iov, &iovlen, "allow_other", NULL, -1);
ret = nmount (iov, iovlen, mountflags);
#else
ret = mount (source, mountpoint, fstype, mountflags,
@@ -295,7 +430,7 @@ fuse_mount_sys (const char *mountpoint, char *fsname,
ret = asprintf (&mnt_param_mtab, "%s%s",
mountflags & MS_RDONLY ? "ro," : "",
- mnt_param);
+ mnt_param_new);
if (ret == -1)
GFFUSE_LOGERR ("Out of memory");
else {
@@ -320,6 +455,7 @@ out:
umount2 (mountpoint, 2); /* lazy umount */
}
FREE (mnt_param_mnt);
+ FREE (mnt_param_new);
if (source != fsname)
FREE (source);
@@ -328,8 +464,7 @@ out:
int
gf_fuse_mount (const char *mountpoint, char *fsname,
- unsigned long mountflags, char *mnt_param,
- pid_t *mnt_pid, int status_fd)
+ char *mnt_param, pid_t *mnt_pid, int status_fd)
{
int fd = -1;
pid_t pid = -1;
@@ -356,16 +491,19 @@ gf_fuse_mount (const char *mountpoint, char *fsname,
exit (pid == -1 ? 1 : 0);
}
- ret = fuse_mount_sys (mountpoint, fsname, mountflags, mnt_param,
- fd);
+ ret = fuse_mount_sys (mountpoint, fsname, mnt_param, fd);
if (ret == -1) {
gf_log ("glusterfs-fuse", GF_LOG_INFO,
- "direct mount failed (%s) errno %d, "
- "retry to mount via fusermount",
+ "direct mount failed (%s) errno %d",
strerror (errno), errno);
- ret = fuse_mount_fusermount (mountpoint, fsname,
- mountflags, mnt_param, fd);
+ if (errno == EPERM) {
+ gf_log ("glusterfs-fuse", GF_LOG_INFO,
+ "retry to mount via fusermount");
+
+ ret = fuse_mount_fusermount (mountpoint, fsname,
+ mnt_param, fd);
+ }
}
if (ret == -1)
generated by cgit (git 2.34.1) at 2025-12-28 16:31:21 +0000