19e86db79SHyon Kim /*
29e86db79SHyon Kim * CDDL HEADER START
39e86db79SHyon Kim *
49e86db79SHyon Kim * The contents of this file are subject to the terms of the
59e86db79SHyon Kim * Common Development and Distribution License (the "License").
69e86db79SHyon Kim * You may not use this file except in compliance with the License.
79e86db79SHyon Kim *
89e86db79SHyon Kim * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
99e86db79SHyon Kim * or http://www.opensolaris.org/os/licensing.
109e86db79SHyon Kim * See the License for the specific language governing permissions
119e86db79SHyon Kim * and limitations under the License.
129e86db79SHyon Kim *
139e86db79SHyon Kim * When distributing Covered Code, include this CDDL HEADER in each
149e86db79SHyon Kim * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
159e86db79SHyon Kim * If applicable, add the following below this CDDL HEADER, with the
169e86db79SHyon Kim * fields enclosed by brackets "[]" replaced with your own identifying
179e86db79SHyon Kim * information: Portions Copyright [yyyy] [name of copyright owner]
189e86db79SHyon Kim *
199e86db79SHyon Kim * CDDL HEADER END
209e86db79SHyon Kim */
219e86db79SHyon Kim
229e86db79SHyon Kim /*
239e86db79SHyon Kim * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
249e86db79SHyon Kim * Use is subject to license terms.
259e86db79SHyon Kim */
26*00f453f4SRob Johnston /*
27*00f453f4SRob Johnston * Copyright 2019 Joyent, Inc.
28*00f453f4SRob Johnston */
299e86db79SHyon Kim
309e86db79SHyon Kim #include <sun_sas.h>
319e86db79SHyon Kim #include <sys/types.h>
329e86db79SHyon Kim #include <sys/stat.h>
339e86db79SHyon Kim #include <fcntl.h>
349e86db79SHyon Kim #include <unistd.h>
359e86db79SHyon Kim #include <dirent.h>
369e86db79SHyon Kim #include <libdevinfo.h>
379e86db79SHyon Kim
389e86db79SHyon Kim /*
399e86db79SHyon Kim * structure for di_devlink_walk
409e86db79SHyon Kim */
419e86db79SHyon Kim typedef struct walk_devlink {
429e86db79SHyon Kim char *path;
439e86db79SHyon Kim size_t len;
449e86db79SHyon Kim char **linkpp;
459e86db79SHyon Kim } walk_devlink_t;
469e86db79SHyon Kim
479e86db79SHyon Kim /*
489e86db79SHyon Kim * callback funtion for di_devlink_walk
499e86db79SHyon Kim * Find matching /dev link for the given path argument.
509e86db79SHyon Kim * devlink element and callback function argument.
519e86db79SHyon Kim * The input path is expected to not have "/devices".
529e86db79SHyon Kim */
539e86db79SHyon Kim static int
get_devlink(di_devlink_t devlink,void * arg)549e86db79SHyon Kim get_devlink(di_devlink_t devlink, void *arg)
559e86db79SHyon Kim {
569e86db79SHyon Kim const char ROUTINE[] = "get_devlink";
579e86db79SHyon Kim walk_devlink_t *warg = (walk_devlink_t *)arg;
589e86db79SHyon Kim
599e86db79SHyon Kim /*
609e86db79SHyon Kim * When path is specified, it doesn't have minor
619e86db79SHyon Kim * name. Therefore, the ../.. prefixes needs to be stripped.
629e86db79SHyon Kim */
639e86db79SHyon Kim if (warg->path) {
649e86db79SHyon Kim char *content = (char *)di_devlink_content(devlink);
659e86db79SHyon Kim char *start = strstr(content, "/devices");
669e86db79SHyon Kim
679e86db79SHyon Kim if (start == NULL ||
689e86db79SHyon Kim strncmp(start, warg->path, warg->len) != 0 ||
699e86db79SHyon Kim /* make it sure the device path has minor name */
709e86db79SHyon Kim start[warg->len] != ':') {
719e86db79SHyon Kim return (DI_WALK_CONTINUE);
729e86db79SHyon Kim }
739e86db79SHyon Kim }
749e86db79SHyon Kim
759e86db79SHyon Kim *(warg->linkpp) = strdup(di_devlink_path(devlink));
769e86db79SHyon Kim log(LOG_DEBUG, ROUTINE, "Walk terminate");
779e86db79SHyon Kim return (DI_WALK_TERMINATE);
789e86db79SHyon Kim }
799e86db79SHyon Kim
809e86db79SHyon Kim /*
819e86db79SHyon Kim * Convert /devices paths to /dev sym-link paths.
829e86db79SHyon Kim * The mapping buffer OSDeviceName paths will be
839e86db79SHyon Kim * converted to short names.
849e86db79SHyon Kim * mappings The target mappings data to convert to short names
859e86db79SHyon Kim *
869e86db79SHyon Kim * If no link is found, the long path is left as is.
879e86db79SHyon Kim * Note: The NumberOfEntries field MUST not be greater than the size
889e86db79SHyon Kim * of the array passed in.
899e86db79SHyon Kim */
909e86db79SHyon Kim void
convertDevpathToDevlink(PSMHBA_TARGETMAPPING mappings)919e86db79SHyon Kim convertDevpathToDevlink(PSMHBA_TARGETMAPPING mappings)
929e86db79SHyon Kim {
939e86db79SHyon Kim const char ROUTINE[] = "convertDevpathToLink";
949e86db79SHyon Kim di_devlink_handle_t hdl;
959e86db79SHyon Kim walk_devlink_t warg;
969e86db79SHyon Kim int j;
979e86db79SHyon Kim char *minor_path, *devlinkp;
989e86db79SHyon Kim
999e86db79SHyon Kim if ((hdl = di_devlink_init(NULL, 0)) == NULL) {
1009e86db79SHyon Kim log(LOG_DEBUG, ROUTINE, "di_devlink failed: errno:%d",
1019e86db79SHyon Kim strerror(errno));
1029e86db79SHyon Kim return;
1039e86db79SHyon Kim }
1049e86db79SHyon Kim
1059e86db79SHyon Kim for (j = 0; j < mappings->NumberOfEntries; j++) {
1069e86db79SHyon Kim if (strchr(mappings->entry[j].ScsiId.OSDeviceName, ':')) {
1079e86db79SHyon Kim /* search link for minor node */
1089e86db79SHyon Kim minor_path = mappings->entry[j].ScsiId.OSDeviceName;
1099e86db79SHyon Kim if (strstr(minor_path, "/devices") != NULL) {
1109e86db79SHyon Kim minor_path = mappings->entry[j].ScsiId.
1119e86db79SHyon Kim OSDeviceName + strlen("/devices");
1129e86db79SHyon Kim }
1139e86db79SHyon Kim warg.path = NULL;
1149e86db79SHyon Kim } else {
1159e86db79SHyon Kim minor_path = NULL;
1169e86db79SHyon Kim if (strstr(mappings->entry[j].ScsiId.OSDeviceName,
1179e86db79SHyon Kim "/devices") != NULL) {
1189e86db79SHyon Kim warg.len = strlen(mappings->entry[j].ScsiId.
1199e86db79SHyon Kim OSDeviceName) - strlen("/devices");
1209e86db79SHyon Kim warg.path = mappings->entry[j].
1219e86db79SHyon Kim ScsiId.OSDeviceName + strlen("/devices");
1229e86db79SHyon Kim } else {
1239e86db79SHyon Kim warg.len = strlen(mappings->entry[j].ScsiId.
1249e86db79SHyon Kim OSDeviceName);
1259e86db79SHyon Kim warg.path = mappings->entry[j].ScsiId.
1269e86db79SHyon Kim OSDeviceName;
1279e86db79SHyon Kim }
1289e86db79SHyon Kim }
1299e86db79SHyon Kim
1309e86db79SHyon Kim devlinkp = NULL;
1319e86db79SHyon Kim warg.linkpp = &devlinkp;
1329e86db79SHyon Kim (void) di_devlink_walk(hdl, NULL, minor_path, DI_PRIMARY_LINK,
1339e86db79SHyon Kim (void *)&warg, get_devlink);
1349e86db79SHyon Kim
1359e86db79SHyon Kim if (devlinkp != NULL) {
1369e86db79SHyon Kim (void) snprintf(mappings->entry[j].ScsiId.OSDeviceName,
1379e86db79SHyon Kim sizeof (mappings->entry[j].ScsiId.OSDeviceName),
1389e86db79SHyon Kim "%s", devlinkp);
1399e86db79SHyon Kim free(devlinkp);
1409e86db79SHyon Kim }
1419e86db79SHyon Kim
1429e86db79SHyon Kim }
1439e86db79SHyon Kim
1449e86db79SHyon Kim (void) di_devlink_fini(&hdl);
1459e86db79SHyon Kim }
1469e86db79SHyon Kim
1479e86db79SHyon Kim /*
1489e86db79SHyon Kim * Finds controller path for a give device path.
1499e86db79SHyon Kim *
1509e86db79SHyon Kim * Return value: /dev link for dir and minor name.
1519e86db79SHyon Kim */
1529e86db79SHyon Kim static HBA_STATUS
lookupLink(char * path,char * link,const char * dir,const char * mname)1539e86db79SHyon Kim lookupLink(char *path, char *link, const char *dir, const char *mname)
1549e86db79SHyon Kim {
1559e86db79SHyon Kim const char ROUTINE[] = "lookupLink";
1569e86db79SHyon Kim DIR *dp;
1579e86db79SHyon Kim char buf[MAXPATHLEN];
1589e86db79SHyon Kim char node[MAXPATHLEN];
1599e86db79SHyon Kim char *charptr;
1609e86db79SHyon Kim struct dirent *newdirp, *dirp;
1619e86db79SHyon Kim ssize_t count;
1629e86db79SHyon Kim int dirplen;
1639e86db79SHyon Kim char *subpath;
1649e86db79SHyon Kim char tmpPath[MAXPATHLEN];
1659e86db79SHyon Kim
1669e86db79SHyon Kim if ((dp = opendir(dir)) == NULL) {
1679e86db79SHyon Kim log(LOG_DEBUG, ROUTINE,
1689e86db79SHyon Kim "Unable to open %s to find controller number.", dir);
1699e86db79SHyon Kim return (HBA_STATUS_ERROR);
1709e86db79SHyon Kim }
1719e86db79SHyon Kim
1729e86db79SHyon Kim if (link == NULL) {
1739e86db79SHyon Kim log(LOG_DEBUG, ROUTINE,
1749e86db79SHyon Kim "Invalid argument for storing the link.");
1759e86db79SHyon Kim return (HBA_STATUS_ERROR);
1769e86db79SHyon Kim }
1779e86db79SHyon Kim
1789e86db79SHyon Kim /*
1799e86db79SHyon Kim * dirplen is large enough to fit the largest path-
1809e86db79SHyon Kim * struct dirent includes one byte (the terminator)
1819e86db79SHyon Kim * so we don't add 1 to the calculation here.
1829e86db79SHyon Kim */
1839e86db79SHyon Kim dirplen = pathconf(dir, _PC_NAME_MAX);
1849e86db79SHyon Kim dirplen = ((dirplen <= 0) ? MAXNAMELEN : dirplen) +
1859e86db79SHyon Kim sizeof (struct dirent);
1869e86db79SHyon Kim dirp = (struct dirent *)malloc(dirplen);
1879e86db79SHyon Kim if (dirp == NULL) {
1889e86db79SHyon Kim OUT_OF_MEMORY(ROUTINE);
1899e86db79SHyon Kim return (HBA_STATUS_ERROR);
1909e86db79SHyon Kim }
1919e86db79SHyon Kim
1929e86db79SHyon Kim while ((readdir_r(dp, dirp, &newdirp)) == 0 && newdirp != NULL) {
1939e86db79SHyon Kim if (strcmp(dirp->d_name, ".") == 0 ||
1949e86db79SHyon Kim strcmp(dirp->d_name, "..") == 0) {
1959e86db79SHyon Kim continue;
1969e86db79SHyon Kim }
1979e86db79SHyon Kim /*
1989e86db79SHyon Kim * set to another pointer since dirp->d_name length is 1
1999e86db79SHyon Kim * that will store only the first char 'c' from the name.
2009e86db79SHyon Kim */
2019e86db79SHyon Kim charptr = dirp->d_name;
2029e86db79SHyon Kim (void) snprintf(node, strlen(charptr) + strlen(dir) + 2,
2039e86db79SHyon Kim "%s/%s", dir, charptr);
204*00f453f4SRob Johnston if ((count = readlink(node, buf, sizeof (buf))) > 0) {
2059e86db79SHyon Kim subpath = NULL;
2069e86db79SHyon Kim subpath = strstr(buf, path);
2079e86db79SHyon Kim buf[count] = '\0';
2089e86db79SHyon Kim if (subpath != NULL) {
2099e86db79SHyon Kim (void) strlcpy(tmpPath, path, MAXPATHLEN);
2109e86db79SHyon Kim (void) strlcat(tmpPath, mname, MAXPATHLEN);
2119e86db79SHyon Kim /*
2129e86db79SHyon Kim * if device path has substring of path
2139e86db79SHyon Kim * and exactally matching with :scsi suffix
2149e86db79SHyon Kim */
2159e86db79SHyon Kim if (strcmp(subpath, tmpPath) == 0) {
2169e86db79SHyon Kim (void) strlcpy(link, node, MAXPATHLEN);
2179e86db79SHyon Kim (void) closedir(dp);
2189e86db79SHyon Kim S_FREE(dirp);
2199e86db79SHyon Kim return (HBA_STATUS_OK);
2209e86db79SHyon Kim }
2219e86db79SHyon Kim }
2229e86db79SHyon Kim }
2239e86db79SHyon Kim }
2249e86db79SHyon Kim
2259e86db79SHyon Kim (void) closedir(dp);
2269e86db79SHyon Kim S_FREE(dirp);
2279e86db79SHyon Kim return (HBA_STATUS_ERROR);
2289e86db79SHyon Kim }
2299e86db79SHyon Kim
2309e86db79SHyon Kim /*
2319e86db79SHyon Kim * Finds controller path for a give device path.
2329e86db79SHyon Kim *
2339e86db79SHyon Kim * Return vale:i smp devlink.
2349e86db79SHyon Kim */
2359e86db79SHyon Kim HBA_STATUS
lookupControllerLink(char * path,char * link)2369e86db79SHyon Kim lookupControllerLink(char *path, char *link)
2379e86db79SHyon Kim {
2389e86db79SHyon Kim const char dir[] = "/dev/cfg";
2399e86db79SHyon Kim const char mname[] = ":scsi";
2409e86db79SHyon Kim return (lookupLink(path, link, dir, mname));
2419e86db79SHyon Kim }
2429e86db79SHyon Kim
2439e86db79SHyon Kim /*
2449e86db79SHyon Kim * Finds smp devlink for a give smp path.
2459e86db79SHyon Kim *
2469e86db79SHyon Kim * Return vale: smp devlink.
2479e86db79SHyon Kim */
2489e86db79SHyon Kim HBA_STATUS
lookupSMPLink(char * path,char * link)2499e86db79SHyon Kim lookupSMPLink(char *path, char *link)
2509e86db79SHyon Kim {
2519e86db79SHyon Kim const char dir[] = "/dev/smp";
2529e86db79SHyon Kim const char mname[] = ":smp";
2539e86db79SHyon Kim return (lookupLink(path, link, dir, mname));
2549e86db79SHyon Kim }
255