561 lines
12 KiB
C
561 lines
12 KiB
C
/* ofpath.c - calculate OpenFirmware path names given an OS device */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009, 2011,2012, 2013 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#undef OFPATH_STANDALONE
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#ifndef OFPATH_STANDALONE
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#include <grub/types.h>
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#include <grub/util/misc.h>
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#include <grub/util/ofpath.h>
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#include <grub/i18n.h>
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#endif
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#include <limits.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <ctype.h>
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#ifdef OFPATH_STANDALONE
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#define xmalloc malloc
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void
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grub_util_error (const char *fmt, ...)
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{
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va_list ap;
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fprintf (stderr, "ofpath: error: ");
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va_start (ap, fmt);
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vfprintf (stderr, fmt, ap);
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va_end (ap);
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fputc ('\n', stderr);
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exit (1);
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}
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void
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grub_util_info (const char *fmt, ...)
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{
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va_list ap;
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fprintf (stderr, "ofpath: info: ");
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va_start (ap, fmt);
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vfprintf (stderr, fmt, ap);
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va_end (ap);
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fputc ('\n', stderr);
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}
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#define grub_util_warn grub_util_info
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#define _(x) x
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#define xstrdup strdup
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#endif
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static void
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kill_trailing_dir(char *path)
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{
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char *end = path + strlen(path) - 1;
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while (end >= path)
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{
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if (*end != '/')
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{
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end--;
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continue;
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}
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*end = '\0';
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break;
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}
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}
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static void
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trim_newline (char *path)
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{
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char *end = path + strlen(path) - 1;
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while (*end == '\n')
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*end-- = '\0';
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}
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#define MAX_DISK_CAT 64
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static char *
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find_obppath (const char *sysfs_path_orig)
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{
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char *sysfs_path, *path;
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size_t path_size = strlen (sysfs_path_orig) + sizeof ("/obppath");
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sysfs_path = xstrdup (sysfs_path_orig);
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path = xmalloc (path_size);
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while (1)
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{
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int fd;
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char *of_path;
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struct stat st;
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size_t size;
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snprintf(path, path_size, "%s/obppath", sysfs_path);
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#if 0
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printf("Trying %s\n", path);
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#endif
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fd = open(path, O_RDONLY);
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if (fd < 0 || fstat (fd, &st) < 0)
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{
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snprintf(path, path_size, "%s/devspec", sysfs_path);
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fd = open(path, O_RDONLY);
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}
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if (fd < 0 || fstat (fd, &st) < 0)
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{
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kill_trailing_dir(sysfs_path);
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if (!strcmp(sysfs_path, "/sys"))
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{
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grub_util_info (_("`obppath' not found in parent dirs of `%s',"
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" no IEEE1275 name discovery"),
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sysfs_path_orig);
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free (path);
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free (sysfs_path);
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return NULL;
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}
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continue;
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}
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size = st.st_size;
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of_path = xmalloc (size + MAX_DISK_CAT + 1);
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memset(of_path, 0, size + MAX_DISK_CAT + 1);
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if (read(fd, of_path, size) < 0)
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{
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grub_util_info (_("cannot read `%s': %s"), path, strerror (errno));
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close(fd);
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return NULL;
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}
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close(fd);
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trim_newline(of_path);
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free (path);
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free (sysfs_path);
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return of_path;
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}
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}
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static char *
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xrealpath (const char *in)
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{
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char *out;
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#ifdef PATH_MAX
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out = xmalloc (PATH_MAX);
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out = realpath (in, out);
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#else
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out = realpath (in, NULL);
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#endif
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if (!out)
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grub_util_error (_("failed to get canonical path of `%s'"), in);
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return out;
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}
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static char *
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block_device_get_sysfs_path_and_link(const char *devicenode)
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{
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char *rpath;
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char *rpath2;
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char *ret;
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size_t tmp_size = strlen (devicenode) + sizeof ("/sys/block/");
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char *tmp = xmalloc (tmp_size);
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memcpy (tmp, "/sys/block/", sizeof ("/sys/block/"));
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strcat (tmp, devicenode);
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rpath = xrealpath (tmp);
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rpath2 = xmalloc (strlen (rpath) + sizeof ("/device"));
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strcpy (rpath2, rpath);
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strcat (rpath2, "/device");
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ret = xrealpath (rpath2);
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free (tmp);
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free (rpath);
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free (rpath2);
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return ret;
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}
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static inline int
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my_isdigit (int c)
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{
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return (c >= '0' && c <= '9');
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}
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static const char *
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trailing_digits (const char *p)
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{
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const char *end;
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end = p + strlen(p) - 1;
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while (end >= p)
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{
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if (! my_isdigit(*end))
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break;
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end--;
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}
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return end + 1;
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}
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static char *
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__of_path_common(char *sysfs_path,
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const char *device, int devno)
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{
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const char *digit_string;
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char disk[MAX_DISK_CAT];
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char *of_path = find_obppath(sysfs_path);
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if (!of_path)
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return NULL;
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digit_string = trailing_digits (device);
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if (*digit_string == '\0')
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{
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snprintf(disk, sizeof (disk), "/disk@%d", devno);
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}
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else
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{
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int part;
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sscanf(digit_string, "%d", &part);
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snprintf(disk, sizeof (disk), "/disk@%d:%c", devno, 'a' + (part - 1));
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}
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strcat(of_path, disk);
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return of_path;
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}
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static char *
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get_basename(char *p)
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{
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char *ret = p;
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while (*p)
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{
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if (*p == '/')
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ret = p + 1;
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p++;
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}
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return ret;
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}
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static char *
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of_path_of_vdisk(const char *sys_devname __attribute__((unused)),
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const char *device,
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const char *devnode __attribute__((unused)),
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const char *devicenode)
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{
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char *sysfs_path, *p;
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int devno, junk;
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char *ret;
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sysfs_path = block_device_get_sysfs_path_and_link(devicenode);
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p = get_basename (sysfs_path);
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sscanf(p, "vdc-port-%d-%d", &devno, &junk);
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ret = __of_path_common (sysfs_path, device, devno);
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free (sysfs_path);
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return ret;
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}
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static char *
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of_path_of_ide(const char *sys_devname __attribute__((unused)), const char *device,
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const char *devnode __attribute__((unused)),
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const char *devicenode)
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{
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char *sysfs_path, *p;
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int chan, devno;
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char *ret;
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sysfs_path = block_device_get_sysfs_path_and_link(devicenode);
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p = get_basename (sysfs_path);
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sscanf(p, "%d.%d", &chan, &devno);
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ret = __of_path_common(sysfs_path, device, 2 * chan + devno);
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free (sysfs_path);
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return ret;
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}
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static int
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vendor_is_ATA(const char *path)
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{
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int fd, err;
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char *bufname;
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char bufcont[3];
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size_t path_size;
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path_size = strlen (path) + sizeof ("/vendor");
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bufname = xmalloc (path_size);
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snprintf (bufname, path_size, "%s/vendor", path);
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fd = open (bufname, O_RDONLY);
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if (fd < 0)
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grub_util_error (_("cannot open `%s': %s"), bufname, strerror (errno));
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memset(bufcont, 0, sizeof (bufcont));
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err = read(fd, bufcont, sizeof (bufcont));
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if (err < 0)
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grub_util_error (_("cannot open `%s': %s"), bufname, strerror (errno));
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close(fd);
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free (bufname);
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return (memcmp(bufcont, "ATA", 3) == 0);
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}
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static void
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check_sas (char *sysfs_path, int *tgt, unsigned long int *sas_address)
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{
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char *ed = strstr (sysfs_path, "end_device");
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char *p, *q, *path;
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char phy[21];
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int fd;
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size_t path_size;
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if (!ed)
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return;
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/* SAS devices are identified using disk@$PHY_ID */
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p = strdup (sysfs_path);
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ed = strstr(p, "end_device");
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q = ed;
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while (*q && *q != '/')
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q++;
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*q = '\0';
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path_size = (strlen (p) + strlen (ed)
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+ sizeof ("%s/sas_device/%s/phy_identifier"));
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path = xmalloc (path_size);
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snprintf (path, path_size, "%s/sas_device/%s/phy_identifier", p, ed);
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fd = open (path, O_RDONLY);
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if (fd < 0)
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grub_util_error (_("cannot open `%s': %s"), path, strerror (errno));
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memset (phy, 0, sizeof (phy));
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if (read (fd, phy, sizeof (phy) - 1) < 0)
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grub_util_error (_("cannot read `%s': %s"), path, strerror (errno));
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close (fd);
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sscanf (phy, "%d", tgt);
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snprintf (path, path_size, "%s/sas_device/%s/sas_address", p, ed);
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fd = open (path, O_RDONLY);
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if (fd < 0)
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grub_util_error (_("cannot open `%s': %s"), path, strerror (errno));
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memset (phy, 0, sizeof (phy));
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if (read (fd, phy, sizeof (phy) - 1) < 0)
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grub_util_error (_("cannot read `%s': %s"), path, strerror (errno));
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sscanf (phy, "%lx", sas_address);
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free (path);
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free (p);
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close (fd);
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}
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static char *
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of_path_of_scsi(const char *sys_devname __attribute__((unused)), const char *device,
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const char *devnode __attribute__((unused)),
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const char *devicenode)
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{
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const char *p, *digit_string, *disk_name;
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int host, bus, tgt, lun;
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unsigned long int sas_address;
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char *sysfs_path, disk[MAX_DISK_CAT - sizeof ("/fp@0,0")];
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char *of_path;
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sysfs_path = block_device_get_sysfs_path_and_link(devicenode);
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p = get_basename (sysfs_path);
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sscanf(p, "%d:%d:%d:%d", &host, &bus, &tgt, &lun);
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check_sas (sysfs_path, &tgt, &sas_address);
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if (vendor_is_ATA(sysfs_path))
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{
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of_path = __of_path_common(sysfs_path, device, tgt);
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free (sysfs_path);
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return of_path;
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}
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of_path = find_obppath(sysfs_path);
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free (sysfs_path);
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if (!of_path)
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return NULL;
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if (strstr (of_path, "qlc"))
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strcat (of_path, "/fp@0,0");
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if (strstr (of_path, "sbus"))
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disk_name = "sd";
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else
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disk_name = "disk";
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digit_string = trailing_digits (device);
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if (strncmp (of_path, "/vdevice/", sizeof ("/vdevice/") - 1) == 0)
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{
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unsigned long id = 0x8000 | (tgt << 8) | (bus << 5) | lun;
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if (*digit_string == '\0')
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{
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snprintf(disk, sizeof (disk), "/%s@%04lx000000000000", disk_name, id);
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}
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else
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{
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int part;
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sscanf(digit_string, "%d", &part);
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snprintf(disk, sizeof (disk),
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"/%s@%04lx000000000000:%c", disk_name, id, 'a' + (part - 1));
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}
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}
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else
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{
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if (lun == 0)
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{
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int sas_id = 0;
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sas_id = bus << 16 | tgt << 8 | lun;
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if (*digit_string == '\0')
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{
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snprintf(disk, sizeof (disk), "/sas/%s@%x", disk_name, sas_id);
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}
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else
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{
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int part;
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sscanf(digit_string, "%d", &part);
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snprintf(disk, sizeof (disk),
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"/sas/%s@%x:%c", disk_name, sas_id, 'a' + (part - 1));
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}
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}
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else
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{
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char *lunstr;
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int lunpart[4];
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lunstr = xmalloc (20);
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lunpart[0] = (lun >> 8) & 0xff;
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lunpart[1] = lun & 0xff;
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lunpart[2] = (lun >> 24) & 0xff;
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lunpart[3] = (lun >> 16) & 0xff;
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sprintf(lunstr, "%02x%02x%02x%02x00000000", lunpart[0], lunpart[1], lunpart[2], lunpart[3]);
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long int longlun = atol(lunstr);
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if (*digit_string == '\0')
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{
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snprintf(disk, sizeof (disk), "/sas/%s@%lx,%lu", disk_name, sas_address, longlun);
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}
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else
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{
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int part;
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sscanf(digit_string, "%d", &part);
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snprintf(disk, sizeof (disk),
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"/sas/%s@%lx,%lu:%c", disk_name, sas_address, longlun, 'a' + (part - 1));
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}
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}
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}
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strcat(of_path, disk);
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return of_path;
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}
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static char *
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strip_trailing_digits (const char *p)
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{
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char *new, *end;
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new = strdup (p);
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end = new + strlen(new) - 1;
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while (end >= new)
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{
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if (! my_isdigit(*end))
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break;
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*end-- = '\0';
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}
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return new;
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}
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char *
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grub_util_devname_to_ofpath (const char *sys_devname)
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{
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char *name_buf, *device, *devnode, *devicenode, *ofpath;
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name_buf = xrealpath (sys_devname);
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device = get_basename (name_buf);
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devnode = strip_trailing_digits (name_buf);
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devicenode = strip_trailing_digits (device);
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if (device[0] == 'h' && device[1] == 'd')
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ofpath = of_path_of_ide(name_buf, device, devnode, devicenode);
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else if (device[0] == 's'
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&& (device[1] == 'd' || device[1] == 'r'))
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ofpath = of_path_of_scsi(name_buf, device, devnode, devicenode);
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else if (device[0] == 'v' && device[1] == 'd' && device[2] == 'i'
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&& device[3] == 's' && device[4] == 'k')
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ofpath = of_path_of_vdisk(name_buf, device, devnode, devicenode);
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else if (device[0] == 'f' && device[1] == 'd'
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&& device[2] == '0' && device[3] == '\0')
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/* All the models I've seen have a devalias "floppy".
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New models have no floppy at all. */
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ofpath = xstrdup ("floppy");
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else
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{
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grub_util_warn (_("unknown device type %s\n"), device);
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return NULL;
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}
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free (devnode);
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free (devicenode);
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free (name_buf);
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return ofpath;
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}
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#ifdef OFPATH_STANDALONE
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int main(int argc, char **argv)
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{
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char *of_path;
|
|
|
|
if (argc != 2)
|
|
{
|
|
printf(_("Usage: %s DEVICE\n"), argv[0]);
|
|
return 1;
|
|
}
|
|
|
|
of_path = grub_util_devname_to_ofpath (argv[1]);
|
|
if (of_path)
|
|
printf("%s\n", of_path);
|
|
free (of_path);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|