/* * Mount the given filesystem. */ int zfs_mount(zfs_handle_t *zhp, const char *options, int flags) { struct stat buf; char mountpoint[ZFS_MAXPROPLEN]; char mntopts[MNT_LINE_MAX]; libzfs_handle_t *hdl = zhp->zfs_hdl; if (options == NULL) mntopts[0] = '\0'; else (void) strlcpy(mntopts, options, sizeof (mntopts)); if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) return (0); /* Create the directory if it doesn't already exist */ if (lstat(mountpoint, &buf) != 0) { if (mkdirp(mountpoint, 0755) != 0) { zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "failed to create mountpoint")); return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint)); } } /* * Determine if the mountpoint is empty. If so, refuse to perform the * mount. We don't perform this check if MS_OVERLAY is specified, which * would defeat the point. We also avoid this check if 'remount' is * specified. */ if ((flags & MS_OVERLAY) == 0 && strstr(mntopts, MNTOPT_REMOUNT) == NULL && !dir_is_empty(mountpoint)) { zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "directory is not empty")); return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint)); } /* perform the mount */ /* ZFSFUSE */ if (zfsfuse_mount(hdl, zfs_get_name(zhp), mountpoint, MS_OPTIONSTR | flags, MNTTYPE_ZFS, NULL, 0, mntopts, strlen (mntopts)) != 0) { /* * Generic errors are nasty, but there are just way too many * from mount(), and they're well-understood. We pick a few * common ones to improve upon. */ if (errno == EBUSY) { zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "mountpoint or dataset is busy")); } else if (errno == EPERM) { zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "Insufficient privileges")); } else { zfs_error_aux(hdl, strerror(errno)); } return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, dgettext(TEXT_DOMAIN, "cannot mount '%s'"), zhp->zfs_name)); } return (0); }
/* * Mount the given filesystem. */ int zfs_mount(zfs_handle_t *zhp, const char *options, int flags) { struct stat buf; char mountpoint[ZFS_MAXPROPLEN]; char mntopts[MNT_LINE_MAX]; libzfs_handle_t *hdl = zhp->zfs_hdl; if (options == NULL) mntopts[0] = '\0'; else (void) strlcpy(mntopts, options, sizeof (mntopts)); if (!zfs_is_mountable(zhp, mountpoint, sizeof (mountpoint), NULL)) return (0); /* Create the directory if it doesn't already exist */ if (lstat(mountpoint, &buf) != 0) { if (mkdirp(mountpoint, 0755) != 0) { zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "failed to create mountpoint")); return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint)); } } /* * Determine if the mountpoint is empty. If so, refuse to perform the * mount. We don't perform this check if MS_OVERLAY is specified, which * would defeat the point. We also avoid this check if 'remount' is * specified. */ if ((flags & MS_OVERLAY) == 0 && strstr(mntopts, MNTOPT_REMOUNT) == NULL && !dir_is_empty(mountpoint)) { zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "directory is not empty")); return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, dgettext(TEXT_DOMAIN, "cannot mount '%s'"), mountpoint)); } /* perform the mount */ /* ZFSFUSE */ if (zfsfuse_mount(hdl, zfs_get_name(zhp), mountpoint, MS_OPTIONSTR | flags, MNTTYPE_ZFS, NULL, 0, mntopts, strlen (mntopts)) != 0) { /* * Generic errors are nasty, but there are just way too many * from mount(), and they're well-understood. We pick a few * common ones to improve upon. */ if (errno == EBUSY) { zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "mountpoint or dataset is busy")); } else if (errno == EPERM) { zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "Insufficient privileges")); } else if (errno == ENOTSUP) { char buf[256]; int spa_version; VERIFY(zfs_spa_version(zhp, &spa_version) == 0); (void) snprintf(buf, sizeof (buf), dgettext(TEXT_DOMAIN, "Can't mount a version %lld " "file system on a version %d pool. Pool must be" " upgraded to mount this file system."), (u_longlong_t)zfs_prop_get_int(zhp, ZFS_PROP_VERSION), spa_version); zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, buf)); } else if (errno == EIO) { zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "Input/output error.\nMake sure the FUSE module is " "loaded.")); } else { zfs_error_aux(hdl, strerror(errno)); } return (zfs_error_fmt(hdl, EZFS_MOUNTFAILED, dgettext(TEXT_DOMAIN, "cannot mount '%s'"), zhp->zfs_name)); } /* add the mounted entry into our cache */ libzfs_mnttab_add(hdl, zfs_get_name(zhp), mountpoint, mntopts); return (0); }