lib/libzutil/os/freebsd/zutil_device_path_os.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or https://opensource.org/licenses/CDDL-1.0.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 #include <ctype.h>
  23 #include <fcntl.h>
  24 #include <paths.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28
  29 #include <sys/stat.h>
  30
  31 #include <libgeom.h>
  32
  33 #include <libzutil.h>
  34
  35 /*
  36  * We don't strip/append partitions on FreeBSD.
  37  */
  38
  39 /*
  40  * Note: The caller must free the returned string.
  41  */
  42 char *
  43 zfs_strip_partition(const char *dev)
  44 {
  45         return (strdup(dev));
  46 }
  47
  48 int
  49 zfs_append_partition(char *path, size_t max_len)
  50 {
  51         return (strnlen(path, max_len));
  52 }
  53
  54 /*
  55  * Strip the path from a device name.
  56  * On FreeBSD we only want to remove "/dev/" from the beginning of
  57  * paths if present.
  58  */
  59 const char *
  60 zfs_strip_path(const char *path)
  61 {
  62         if (strncmp(path, _PATH_DEV, sizeof (_PATH_DEV) - 1) == 0)
  63                 return (path + sizeof (_PATH_DEV) - 1);
  64         else
  65                 return (path);
  66 }
  67
  68 char *
  69 zfs_get_underlying_path(const char *dev_name)
  70 {
  71
  72         if (dev_name == NULL)
  73                 return (NULL);
  74
  75         return (realpath(dev_name, NULL));
  76 }
  77
  78 boolean_t
  79 zfs_dev_is_whole_disk(const char *dev_name)
  80 {
  81         int fd;
  82
  83         fd = g_open(dev_name, 0);
  84         if (fd >= 0) {
  85                 g_close(fd);
  86                 return (B_TRUE);
  87         }
  88         return (B_FALSE);
  89 }
  90
  91 /*
  92  * Wait up to timeout_ms for udev to set up the device node.  The device is
  93  * considered ready when libudev determines it has been initialized, all of
  94  * the device links have been verified to exist, and it has been allowed to
  95  * settle.  At this point the device the device can be accessed reliably.
  96  * Depending on the complexity of the udev rules this process could take
  97  * several seconds.
  98  */
  99 int
 100 zpool_label_disk_wait(const char *path, int timeout_ms)
 101 {
 102         int settle_ms = 50;
 103         long sleep_ms = 10;
 104         hrtime_t start, settle;
 105         struct stat64 statbuf;
 106
 107         start = gethrtime();
 108         settle = 0;
 109
 110         do {
 111                 errno = 0;
 112                 if ((stat64(path, &statbuf) == 0) && (errno == 0)) {
 113                         if (settle == 0)
 114                                 settle = gethrtime();
 115                         else if (NSEC2MSEC(gethrtime() - settle) >= settle_ms)
 116                                 return (0);
 117                 } else if (errno != ENOENT) {
 118                         return (errno);
 119                 }
 120
 121                 usleep(sleep_ms * MILLISEC);
 122         } while (NSEC2MSEC(gethrtime() - start) < timeout_ms);
 123
 124         return (ENODEV);
 125 }
 126
 127 boolean_t
 128 is_mpath_whole_disk(const char *path)
 129 {
 130         (void) path;
 131         return (B_FALSE);
 132 }