The code did not free 'dir' allocated by opendir(). An additional
benefit is that this simplifies the for() loops.
Fixes: 60f0f54d
("IMSM: Add support for VMD")
Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
747 lines
18 KiB
C
747 lines
18 KiB
C
/*
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* Intel(R) Matrix Storage Manager hardware and firmware support routines
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*
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* Copyright (C) 2008 Intel Corporation
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "mdadm.h"
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#include "platform-intel.h"
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#include "probe_roms.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <sys/mman.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <limits.h>
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static int devpath_to_ll(const char *dev_path, const char *entry,
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unsigned long long *val);
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static void free_sys_dev(struct sys_dev **list)
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{
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while (*list) {
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struct sys_dev *next = (*list)->next;
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if ((*list)->path)
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free((*list)->path);
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free(*list);
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*list = next;
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}
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}
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struct sys_dev *find_driver_devices(const char *bus, const char *driver)
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{
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/* search sysfs for devices driven by 'driver' */
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char path[292];
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char link[256];
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char *c;
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DIR *driver_dir;
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struct dirent *de;
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struct sys_dev *head = NULL;
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struct sys_dev *list = NULL;
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struct sys_dev *vmd = NULL;
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enum sys_dev_type type;
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unsigned long long dev_id;
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unsigned long long class;
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if (strcmp(driver, "isci") == 0)
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type = SYS_DEV_SAS;
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else if (strcmp(driver, "ahci") == 0)
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type = SYS_DEV_SATA;
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else if (strcmp(driver, "nvme") == 0) {
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/* if looking for nvme devs, first look for vmd */
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vmd = find_driver_devices("pci", "vmd");
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type = SYS_DEV_NVME;
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} else if (strcmp(driver, "vmd") == 0)
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type = SYS_DEV_VMD;
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else
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type = SYS_DEV_UNKNOWN;
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sprintf(path, "/sys/bus/%s/drivers/%s", bus, driver);
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driver_dir = opendir(path);
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if (!driver_dir) {
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if (vmd)
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free_sys_dev(&vmd);
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return NULL;
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}
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for (de = readdir(driver_dir); de; de = readdir(driver_dir)) {
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int n;
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int skip = 0;
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/* is 'de' a device? check that the 'subsystem' link exists and
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* that its target matches 'bus'
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*/
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sprintf(path, "/sys/bus/%s/drivers/%s/%s/subsystem",
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bus, driver, de->d_name);
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n = readlink(path, link, sizeof(link));
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if (n < 0 || n >= (int)sizeof(link))
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continue;
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link[n] = '\0';
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c = strrchr(link, '/');
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if (!c)
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continue;
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if (strncmp(bus, c+1, strlen(bus)) != 0)
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continue;
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sprintf(path, "/sys/bus/%s/drivers/%s/%s",
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bus, driver, de->d_name);
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/* if searching for nvme - skip vmd connected one */
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if (type == SYS_DEV_NVME) {
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struct sys_dev *dev;
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char *rp = realpath(path, NULL);
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for (dev = vmd; dev; dev = dev->next) {
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if ((strncmp(dev->path, rp, strlen(dev->path)) == 0))
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skip = 1;
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}
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free(rp);
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}
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/* if it's not Intel device or mark as VMD connected - skip it. */
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if (devpath_to_vendor(path) != 0x8086 || skip == 1)
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continue;
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if (devpath_to_ll(path, "device", &dev_id) != 0)
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continue;
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if (devpath_to_ll(path, "class", &class) != 0)
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continue;
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/* start / add list entry */
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if (!head) {
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head = xmalloc(sizeof(*head));
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list = head;
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} else {
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list->next = xmalloc(sizeof(*head));
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list = list->next;
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}
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if (!list) {
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free_sys_dev(&head);
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break;
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}
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list->dev_id = (__u16) dev_id;
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list->class = (__u32) class;
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list->type = type;
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/* Each VMD device (domain) adds separate PCI bus, it is better to
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* store path as a path to that bus (easier further determination which
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* NVMe dev is connected to this particular VMD domain).
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*/
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if (type == SYS_DEV_VMD) {
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sprintf(path, "/sys/bus/%s/drivers/%s/%s/domain/device",
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bus, driver, de->d_name);
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}
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list->path = realpath(path, NULL);
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list->next = NULL;
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if ((list->pci_id = strrchr(list->path, '/')) != NULL)
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list->pci_id++;
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}
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closedir(driver_dir);
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if (vmd) {
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if (list)
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list->next = vmd;
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else
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head = vmd;
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}
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return head;
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}
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static struct sys_dev *intel_devices=NULL;
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static time_t valid_time = 0;
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struct sys_dev *device_by_id(__u16 device_id)
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{
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struct sys_dev *iter;
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for (iter = intel_devices; iter != NULL; iter = iter->next)
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if (iter->dev_id == device_id)
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return iter;
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return NULL;
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}
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static int devpath_to_ll(const char *dev_path, const char *entry, unsigned long long *val)
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{
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char path[strlen(dev_path) + strlen(entry) + 2];
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int fd;
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int n;
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sprintf(path, "%s/%s", dev_path, entry);
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fd = open(path, O_RDONLY);
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if (fd < 0)
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return -1;
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n = sysfs_fd_get_ll(fd, val);
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close(fd);
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return n;
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}
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__u16 devpath_to_vendor(const char *dev_path)
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{
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char path[strlen(dev_path) + strlen("/vendor") + 1];
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char vendor[7];
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int fd;
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__u16 id = 0xffff;
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int n;
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sprintf(path, "%s/vendor", dev_path);
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fd = open(path, O_RDONLY);
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if (fd < 0)
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return 0xffff;
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n = read(fd, vendor, sizeof(vendor));
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if (n == sizeof(vendor)) {
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vendor[n - 1] = '\0';
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id = strtoul(vendor, NULL, 16);
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}
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close(fd);
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return id;
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}
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struct sys_dev *find_intel_devices(void)
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{
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struct sys_dev *ahci, *isci, *nvme;
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if (valid_time > time(0) - 10)
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return intel_devices;
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if (intel_devices)
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free_sys_dev(&intel_devices);
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isci = find_driver_devices("pci", "isci");
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ahci = find_driver_devices("pci", "ahci");
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/* Searching for NVMe will return list of NVMe and VMD controllers */
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nvme = find_driver_devices("pci", "nvme");
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if (!isci && !ahci) {
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ahci = nvme;
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} else if (!ahci) {
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ahci = isci;
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struct sys_dev *elem = ahci;
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while (elem->next)
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elem = elem->next;
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elem->next = nvme;
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} else {
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struct sys_dev *elem = ahci;
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while (elem->next)
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elem = elem->next;
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elem->next = isci;
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while (elem->next)
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elem = elem->next;
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elem->next = nvme;
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}
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intel_devices = ahci;
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valid_time = time(0);
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return intel_devices;
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}
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/*
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* PCI Expansion ROM Data Structure Format */
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struct pciExpDataStructFormat {
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__u8 ver[4];
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__u16 vendorID;
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__u16 deviceID;
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__u16 devListOffset;
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__u16 pciDataStructLen;
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__u8 pciDataStructRev;
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} __attribute__ ((packed));
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struct orom_entry *orom_entries;
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const struct orom_entry *get_orom_entry_by_device_id(__u16 dev_id)
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{
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struct orom_entry *entry;
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struct devid_list *devid;
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for (entry = orom_entries; entry; entry = entry->next) {
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for (devid = entry->devid_list; devid; devid = devid->next) {
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if (devid->devid == dev_id)
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return entry;
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}
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}
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return NULL;
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}
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const struct imsm_orom *get_orom_by_device_id(__u16 dev_id)
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{
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const struct orom_entry *entry = get_orom_entry_by_device_id(dev_id);
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if (entry)
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return &entry->orom;
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return NULL;
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}
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static struct orom_entry *add_orom(const struct imsm_orom *orom)
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{
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struct orom_entry *list;
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struct orom_entry *prev = NULL;
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for (list = orom_entries; list; prev = list, list = list->next)
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;
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list = xmalloc(sizeof(struct orom_entry));
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list->orom = *orom;
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list->devid_list = NULL;
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list->next = NULL;
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if (prev == NULL)
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orom_entries = list;
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else
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prev->next = list;
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return list;
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}
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static void add_orom_device_id(struct orom_entry *entry, __u16 dev_id)
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{
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struct devid_list *list;
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struct devid_list *prev = NULL;
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for (list = entry->devid_list; list; prev = list, list = list->next) {
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if (list->devid == dev_id)
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return;
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}
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list = xmalloc(sizeof(struct devid_list));
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list->devid = dev_id;
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list->next = NULL;
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if (prev == NULL)
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entry->devid_list = list;
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else
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prev->next = list;
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}
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static int scan(const void *start, const void *end, const void *data)
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{
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int offset;
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const struct imsm_orom *imsm_mem = NULL;
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int len = (end - start);
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struct pciExpDataStructFormat *ptr= (struct pciExpDataStructFormat *)data;
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if (data + 0x18 > end) {
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dprintf("cannot find pciExpDataStruct \n");
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return 0;
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}
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dprintf("ptr->vendorID: %lx __le16_to_cpu(ptr->deviceID): %lx \n",
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(ulong) __le16_to_cpu(ptr->vendorID),
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(ulong) __le16_to_cpu(ptr->deviceID));
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if (__le16_to_cpu(ptr->vendorID) != 0x8086)
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return 0;
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for (offset = 0; offset < len; offset += 4) {
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const void *mem = start + offset;
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if ((memcmp(mem, IMSM_OROM_SIGNATURE, 4) == 0)) {
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imsm_mem = mem;
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break;
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}
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}
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if (!imsm_mem)
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return 0;
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struct orom_entry *orom = add_orom(imsm_mem);
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|
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/* only PciDataStructure with revision 3 and above supports devices list. */
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if (ptr->pciDataStructRev >= 3 && ptr->devListOffset) {
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const __u16 *dev_list = (void *)ptr + ptr->devListOffset;
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int i;
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for (i = 0; dev_list[i] != 0; i++)
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add_orom_device_id(orom, dev_list[i]);
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} else {
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add_orom_device_id(orom, __le16_to_cpu(ptr->deviceID));
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}
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return 0;
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}
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const struct imsm_orom *imsm_platform_test(struct sys_dev *hba)
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{
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struct imsm_orom orom = {
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.signature = IMSM_OROM_SIGNATURE,
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.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
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IMSM_OROM_RLC_RAID10 | IMSM_OROM_RLC_RAID5,
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.sss = IMSM_OROM_SSS_4kB | IMSM_OROM_SSS_8kB |
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IMSM_OROM_SSS_16kB | IMSM_OROM_SSS_32kB |
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IMSM_OROM_SSS_64kB | IMSM_OROM_SSS_128kB |
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IMSM_OROM_SSS_256kB | IMSM_OROM_SSS_512kB |
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IMSM_OROM_SSS_1MB | IMSM_OROM_SSS_2MB,
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.dpa = IMSM_OROM_DISKS_PER_ARRAY,
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.tds = IMSM_OROM_TOTAL_DISKS,
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.vpa = IMSM_OROM_VOLUMES_PER_ARRAY,
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.vphba = IMSM_OROM_VOLUMES_PER_HBA
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};
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orom.attr = orom.rlc | IMSM_OROM_ATTR_ChecksumVerify;
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|
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if (check_env("IMSM_TEST_OROM_NORAID5")) {
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orom.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
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IMSM_OROM_RLC_RAID10;
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}
|
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if (check_env("IMSM_TEST_AHCI_EFI_NORAID5") && (hba->type == SYS_DEV_SAS)) {
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orom.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
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IMSM_OROM_RLC_RAID10;
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}
|
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if (check_env("IMSM_TEST_SCU_EFI_NORAID5") && (hba->type == SYS_DEV_SATA)) {
|
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orom.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
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IMSM_OROM_RLC_RAID10;
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}
|
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struct orom_entry *ret = add_orom(&orom);
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|
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add_orom_device_id(ret, hba->dev_id);
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|
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return &ret->orom;
|
|
}
|
|
|
|
static const struct imsm_orom *find_imsm_hba_orom(struct sys_dev *hba)
|
|
{
|
|
unsigned long align;
|
|
|
|
if (check_env("IMSM_TEST_OROM"))
|
|
return imsm_platform_test(hba);
|
|
|
|
/* return empty OROM capabilities in EFI test mode */
|
|
if (check_env("IMSM_TEST_AHCI_EFI") || check_env("IMSM_TEST_SCU_EFI"))
|
|
return NULL;
|
|
|
|
find_intel_devices();
|
|
|
|
if (intel_devices == NULL)
|
|
return NULL;
|
|
|
|
/* scan option-rom memory looking for an imsm signature */
|
|
if (check_env("IMSM_SAFE_OROM_SCAN"))
|
|
align = 2048;
|
|
else
|
|
align = 512;
|
|
if (probe_roms_init(align) != 0)
|
|
return NULL;
|
|
probe_roms();
|
|
/* ignore return value - True is returned if both adapater roms are found */
|
|
scan_adapter_roms(scan);
|
|
probe_roms_exit();
|
|
|
|
return get_orom_by_device_id(hba->dev_id);
|
|
}
|
|
|
|
#define GUID_STR_MAX 37 /* according to GUID format:
|
|
* xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" */
|
|
|
|
#define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
|
|
((struct efi_guid) \
|
|
{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
|
|
(b) & 0xff, ((b) >> 8) & 0xff, \
|
|
(c) & 0xff, ((c) >> 8) & 0xff, \
|
|
(d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
|
|
|
|
#define SYS_EFI_VAR_PATH "/sys/firmware/efi/vars"
|
|
#define SYS_EFIVARS_PATH "/sys/firmware/efi/efivars"
|
|
#define SCU_PROP "RstScuV"
|
|
#define AHCI_PROP "RstSataV"
|
|
#define AHCI_SSATA_PROP "RstsSatV"
|
|
#define AHCI_CSATA_PROP "RstCSatV"
|
|
#define VMD_PROP "RstUefiV"
|
|
|
|
#define VENDOR_GUID \
|
|
EFI_GUID(0x193dfefa, 0xa445, 0x4302, 0x99, 0xd8, 0xef, 0x3a, 0xad, 0x1a, 0x04, 0xc6)
|
|
|
|
#define PCI_CLASS_RAID_CNTRL 0x010400
|
|
|
|
static int read_efi_var(void *buffer, ssize_t buf_size, char *variable_name, struct efi_guid guid)
|
|
{
|
|
char path[PATH_MAX];
|
|
char buf[GUID_STR_MAX];
|
|
int fd;
|
|
ssize_t n;
|
|
|
|
snprintf(path, PATH_MAX, "%s/%s-%s", SYS_EFIVARS_PATH, variable_name, guid_str(buf, guid));
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|
|
|
fd = open(path, O_RDONLY);
|
|
if (fd < 0)
|
|
return 1;
|
|
|
|
/* read the variable attributes and ignore it */
|
|
n = read(fd, buf, sizeof(__u32));
|
|
if (n < 0) {
|
|
close(fd);
|
|
return 1;
|
|
}
|
|
|
|
/* read the variable data */
|
|
n = read(fd, buffer, buf_size);
|
|
close(fd);
|
|
if (n < buf_size)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int read_efi_variable(void *buffer, ssize_t buf_size, char *variable_name, struct efi_guid guid)
|
|
{
|
|
char path[PATH_MAX];
|
|
char buf[GUID_STR_MAX];
|
|
int dfd;
|
|
ssize_t n, var_data_len;
|
|
|
|
/* Try to read the variable using the new efivarfs interface first.
|
|
* If that fails, fall back to the old sysfs-efivars interface. */
|
|
if (!read_efi_var(buffer, buf_size, variable_name, guid))
|
|
return 0;
|
|
|
|
snprintf(path, PATH_MAX, "%s/%s-%s/size", SYS_EFI_VAR_PATH, variable_name, guid_str(buf, guid));
|
|
|
|
dprintf("EFI VAR: path=%s\n", path);
|
|
/* get size of variable data */
|
|
dfd = open(path, O_RDONLY);
|
|
if (dfd < 0)
|
|
return 1;
|
|
|
|
n = read(dfd, &buf, sizeof(buf));
|
|
close(dfd);
|
|
if (n < 0)
|
|
return 1;
|
|
buf[n] = '\0';
|
|
|
|
errno = 0;
|
|
var_data_len = strtoul(buf, NULL, 16);
|
|
if ((errno == ERANGE && (var_data_len == LONG_MAX))
|
|
|| (errno != 0 && var_data_len == 0))
|
|
return 1;
|
|
|
|
/* get data */
|
|
snprintf(path, PATH_MAX, "%s/%s-%s/data", SYS_EFI_VAR_PATH, variable_name, guid_str(buf, guid));
|
|
|
|
dprintf("EFI VAR: path=%s\n", path);
|
|
dfd = open(path, O_RDONLY);
|
|
if (dfd < 0)
|
|
return 1;
|
|
|
|
n = read(dfd, buffer, buf_size);
|
|
close(dfd);
|
|
if (n != var_data_len || n < buf_size) {
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
const struct imsm_orom *find_imsm_efi(struct sys_dev *hba)
|
|
{
|
|
struct imsm_orom orom;
|
|
struct orom_entry *ret;
|
|
int err;
|
|
|
|
if (check_env("IMSM_TEST_AHCI_EFI") || check_env("IMSM_TEST_SCU_EFI"))
|
|
return imsm_platform_test(hba);
|
|
|
|
/* OROM test is set, return that there is no EFI capabilities */
|
|
if (check_env("IMSM_TEST_OROM"))
|
|
return NULL;
|
|
|
|
if (hba->type == SYS_DEV_SATA && hba->class != PCI_CLASS_RAID_CNTRL)
|
|
return NULL;
|
|
|
|
err = read_efi_variable(&orom, sizeof(orom), hba->type == SYS_DEV_SAS ? SCU_PROP : AHCI_PROP, VENDOR_GUID);
|
|
|
|
/* try to read variable for second AHCI controller */
|
|
if (err && hba->type == SYS_DEV_SATA)
|
|
err = read_efi_variable(&orom, sizeof(orom), AHCI_SSATA_PROP, VENDOR_GUID);
|
|
|
|
/* try to read variable for combined AHCI controllers */
|
|
if (err && hba->type == SYS_DEV_SATA) {
|
|
static struct orom_entry *csata;
|
|
|
|
err = read_efi_variable(&orom, sizeof(orom), AHCI_CSATA_PROP, VENDOR_GUID);
|
|
if (!err) {
|
|
if (!csata)
|
|
csata = add_orom(&orom);
|
|
add_orom_device_id(csata, hba->dev_id);
|
|
csata->type = hba->type;
|
|
return &csata->orom;
|
|
}
|
|
}
|
|
|
|
if (hba->type == SYS_DEV_VMD) {
|
|
err = read_efi_variable(&orom, sizeof(orom), VMD_PROP, VENDOR_GUID);
|
|
}
|
|
|
|
if (err)
|
|
return NULL;
|
|
|
|
ret = add_orom(&orom);
|
|
add_orom_device_id(ret, hba->dev_id);
|
|
ret->type = hba->type;
|
|
|
|
return &ret->orom;
|
|
}
|
|
|
|
const struct imsm_orom *find_imsm_nvme(struct sys_dev *hba)
|
|
{
|
|
static struct orom_entry *nvme_orom;
|
|
|
|
if (hba->type != SYS_DEV_NVME)
|
|
return NULL;
|
|
|
|
if (!nvme_orom) {
|
|
struct imsm_orom nvme_orom_compat = {
|
|
.signature = IMSM_NVME_OROM_COMPAT_SIGNATURE,
|
|
.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
|
|
IMSM_OROM_RLC_RAID10 | IMSM_OROM_RLC_RAID5,
|
|
.sss = IMSM_OROM_SSS_4kB | IMSM_OROM_SSS_8kB |
|
|
IMSM_OROM_SSS_16kB | IMSM_OROM_SSS_32kB |
|
|
IMSM_OROM_SSS_64kB | IMSM_OROM_SSS_128kB,
|
|
.dpa = IMSM_OROM_DISKS_PER_ARRAY_NVME,
|
|
.tds = IMSM_OROM_TOTAL_DISKS_NVME,
|
|
.vpa = IMSM_OROM_VOLUMES_PER_ARRAY,
|
|
.vphba = IMSM_OROM_TOTAL_DISKS_NVME / 2 * IMSM_OROM_VOLUMES_PER_ARRAY,
|
|
.attr = IMSM_OROM_ATTR_2TB | IMSM_OROM_ATTR_2TB_DISK,
|
|
.driver_features = IMSM_OROM_CAPABILITIES_EnterpriseSystem
|
|
};
|
|
nvme_orom = add_orom(&nvme_orom_compat);
|
|
}
|
|
add_orom_device_id(nvme_orom, hba->dev_id);
|
|
nvme_orom->type = SYS_DEV_NVME;
|
|
return &nvme_orom->orom;
|
|
}
|
|
|
|
const struct imsm_orom *find_imsm_capability(struct sys_dev *hba)
|
|
{
|
|
const struct imsm_orom *cap = get_orom_by_device_id(hba->dev_id);
|
|
|
|
if (cap)
|
|
return cap;
|
|
|
|
if (hba->type == SYS_DEV_NVME)
|
|
return find_imsm_nvme(hba);
|
|
if ((cap = find_imsm_efi(hba)) != NULL)
|
|
return cap;
|
|
if ((cap = find_imsm_hba_orom(hba)) != NULL)
|
|
return cap;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
char *devt_to_devpath(dev_t dev)
|
|
{
|
|
char device[46];
|
|
|
|
sprintf(device, "/sys/dev/block/%d:%d/device", major(dev), minor(dev));
|
|
return realpath(device, NULL);
|
|
}
|
|
|
|
char *diskfd_to_devpath(int fd)
|
|
{
|
|
/* return the device path for a disk, return NULL on error or fd
|
|
* refers to a partition
|
|
*/
|
|
struct stat st;
|
|
|
|
if (fstat(fd, &st) != 0)
|
|
return NULL;
|
|
if (!S_ISBLK(st.st_mode))
|
|
return NULL;
|
|
|
|
return devt_to_devpath(st.st_rdev);
|
|
}
|
|
|
|
int path_attached_to_hba(const char *disk_path, const char *hba_path)
|
|
{
|
|
int rc;
|
|
|
|
if (check_env("IMSM_TEST_AHCI_DEV") ||
|
|
check_env("IMSM_TEST_SCU_DEV")) {
|
|
return 1;
|
|
}
|
|
|
|
if (!disk_path || !hba_path)
|
|
return 0;
|
|
dprintf("hba: %s - disk: %s\n", hba_path, disk_path);
|
|
if (strncmp(disk_path, hba_path, strlen(hba_path)) == 0)
|
|
rc = 1;
|
|
else
|
|
rc = 0;
|
|
|
|
return rc;
|
|
}
|
|
|
|
int devt_attached_to_hba(dev_t dev, const char *hba_path)
|
|
{
|
|
char *disk_path = devt_to_devpath(dev);
|
|
int rc = path_attached_to_hba(disk_path, hba_path);
|
|
|
|
if (disk_path)
|
|
free(disk_path);
|
|
|
|
return rc;
|
|
}
|
|
|
|
int disk_attached_to_hba(int fd, const char *hba_path)
|
|
{
|
|
char *disk_path = diskfd_to_devpath(fd);
|
|
int rc = path_attached_to_hba(disk_path, hba_path);
|
|
|
|
if (disk_path)
|
|
free(disk_path);
|
|
|
|
return rc;
|
|
}
|
|
|
|
char *vmd_domain_to_controller(struct sys_dev *hba, char *buf)
|
|
{
|
|
struct dirent *ent;
|
|
DIR *dir;
|
|
char path[PATH_MAX];
|
|
|
|
if (!hba)
|
|
return NULL;
|
|
|
|
if (hba->type != SYS_DEV_VMD)
|
|
return NULL;
|
|
|
|
dir = opendir("/sys/bus/pci/drivers/vmd");
|
|
if (!dir)
|
|
return NULL;
|
|
|
|
for (ent = readdir(dir); ent; ent = readdir(dir)) {
|
|
sprintf(path, "/sys/bus/pci/drivers/vmd/%s/domain/device",
|
|
ent->d_name);
|
|
|
|
if (!realpath(path, buf))
|
|
continue;
|
|
|
|
if (strncmp(buf, hba->path, strlen(buf)) == 0) {
|
|
sprintf(path, "/sys/bus/pci/drivers/vmd/%s", ent->d_name);
|
|
closedir(dir);
|
|
return realpath(path, buf);
|
|
}
|
|
}
|
|
|
|
closedir(dir);
|
|
return NULL;
|
|
}
|