zutil_device_path_os.c

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    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 }

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FreeBSD/Linux Kernel Cross Reference sys/contrib/openzfs/lib/libzutil/os/freebsd/zutil_device_path_os.c

FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/lib/libzutil/os/freebsd/zutil_device_path_os.c