#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <limits.h>
-void free_sys_dev(struct sys_dev **list)
+static int devpath_to_ll(const char *dev_path, const char *entry,
+ unsigned long long *val);
+
+static void free_sys_dev(struct sys_dev **list)
{
while (*list) {
struct sys_dev *next = (*list)->next;
struct sys_dev *find_driver_devices(const char *bus, const char *driver)
{
/* search sysfs for devices driven by 'driver' */
- char path[292];
- char link[256];
- char *c;
+ char path[PATH_MAX];
+ char link[PATH_MAX];
+ char *c, *p;
DIR *driver_dir;
struct dirent *de;
struct sys_dev *head = NULL;
struct sys_dev *list = NULL;
+ struct sys_dev *vmd = NULL;
+ enum sys_dev_type type;
+ unsigned long long dev_id;
+ unsigned long long class;
+
+ if (strcmp(driver, "isci") == 0)
+ type = SYS_DEV_SAS;
+ else if (strcmp(driver, "ahci") == 0)
+ type = SYS_DEV_SATA;
+ else if (strcmp(driver, "nvme") == 0) {
+ /* if looking for nvme devs, first look for vmd */
+ vmd = find_driver_devices("pci", "vmd");
+ type = SYS_DEV_NVME;
+ } else if (strcmp(driver, "vmd") == 0)
+ type = SYS_DEV_VMD;
+ else
+ type = SYS_DEV_UNKNOWN;
sprintf(path, "/sys/bus/%s/drivers/%s", bus, driver);
driver_dir = opendir(path);
- if (!driver_dir)
+ if (!driver_dir) {
+ if (vmd)
+ free_sys_dev(&vmd);
return NULL;
+ }
for (de = readdir(driver_dir); de; de = readdir(driver_dir)) {
int n;
+ int skip = 0;
/* is 'de' a device? check that the 'subsystem' link exists and
* that its target matches 'bus'
if (strncmp(bus, c+1, strlen(bus)) != 0)
continue;
+ sprintf(path, "/sys/bus/%s/drivers/%s/%s",
+ bus, driver, de->d_name);
+
+ /* if searching for nvme - skip vmd connected one */
+ if (type == SYS_DEV_NVME) {
+ struct sys_dev *dev;
+ char *rp = realpath(path, NULL);
+ for (dev = vmd; dev; dev = dev->next) {
+ if ((strncmp(dev->path, rp, strlen(dev->path)) == 0))
+ skip = 1;
+ }
+ free(rp);
+ }
+
+ /* if it's not Intel device or mark as VMD connected - skip it. */
+ if (devpath_to_vendor(path) != 0x8086 || skip == 1)
+ continue;
+
+ if (devpath_to_ll(path, "device", &dev_id) != 0)
+ continue;
+
+ if (devpath_to_ll(path, "class", &class) != 0)
+ continue;
+
+ /*
+ * Each VMD device (domain) adds separate PCI bus, it is better
+ * to store path as a path to that bus (easier further
+ * determination which NVMe dev is connected to this particular
+ * VMD domain).
+ */
+ if (type == SYS_DEV_VMD) {
+ sprintf(path, "/sys/bus/%s/drivers/%s/%s/domain/device",
+ bus, driver, de->d_name);
+ }
+ p = realpath(path, NULL);
+ if (p == NULL) {
+ pr_err("Unable to get real path for '%s'\n", path);
+ continue;
+ }
+
/* start / add list entry */
if (!head) {
- head = malloc(sizeof(*head));
+ head = xmalloc(sizeof(*head));
list = head;
} else {
- list->next = malloc(sizeof(*head));
+ list->next = xmalloc(sizeof(*head));
list = list->next;
}
break;
}
- /* generate canonical path name for the device */
- sprintf(path, "/sys/bus/%s/drivers/%s/%s",
- bus, driver, de->d_name);
- list->path = canonicalize_file_name(path);
+ list->dev_id = (__u16) dev_id;
+ list->class = (__u32) class;
+ list->type = type;
list->next = NULL;
+ list->path = p;
+
+ if ((list->pci_id = strrchr(list->path, '/')) != NULL)
+ list->pci_id++;
}
closedir(driver_dir);
+
+ if (vmd) {
+ if (list)
+ list->next = vmd;
+ else
+ head = vmd;
+ }
+
return head;
}
+static struct sys_dev *intel_devices=NULL;
+static time_t valid_time = 0;
+
+struct sys_dev *device_by_id(__u16 device_id)
+{
+ struct sys_dev *iter;
+
+ for (iter = intel_devices; iter != NULL; iter = iter->next)
+ if (iter->dev_id == device_id)
+ return iter;
+ return NULL;
+}
+
+struct sys_dev *device_by_id_and_path(__u16 device_id, const char *path)
+{
+ struct sys_dev *iter;
+
+ for (iter = intel_devices; iter != NULL; iter = iter->next)
+ if ((iter->dev_id == device_id) && strstr(iter->path, path))
+ return iter;
+ return NULL;
+}
+
+static int devpath_to_ll(const char *dev_path, const char *entry, unsigned long long *val)
+{
+ char path[strlen(dev_path) + strlen(entry) + 2];
+ int fd;
+ int n;
+
+ sprintf(path, "%s/%s", dev_path, entry);
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ return -1;
+ n = sysfs_fd_get_ll(fd, val);
+ close(fd);
+ return n;
+}
+
__u16 devpath_to_vendor(const char *dev_path)
{
char path[strlen(dev_path) + strlen("/vendor") + 1];
return id;
}
-static int platform_has_intel_ahci(void)
+struct sys_dev *find_intel_devices(void)
{
- struct sys_dev *devices = find_driver_devices("pci", "ahci");
- struct sys_dev *dev;
- int ret = 0;
+ struct sys_dev *ahci, *isci, *nvme;
+
+ if (valid_time > time(0) - 10)
+ return intel_devices;
+
+ if (intel_devices)
+ free_sys_dev(&intel_devices);
+
+ isci = find_driver_devices("pci", "isci");
+ ahci = find_driver_devices("pci", "ahci");
+ /* Searching for NVMe will return list of NVMe and VMD controllers */
+ nvme = find_driver_devices("pci", "nvme");
+
+ if (!isci && !ahci) {
+ ahci = nvme;
+ } else if (!ahci) {
+ ahci = isci;
+ struct sys_dev *elem = ahci;
+ while (elem->next)
+ elem = elem->next;
+ elem->next = nvme;
+ } else {
+ struct sys_dev *elem = ahci;
+ while (elem->next)
+ elem = elem->next;
+ elem->next = isci;
+ while (elem->next)
+ elem = elem->next;
+ elem->next = nvme;
+ }
+ intel_devices = ahci;
+ valid_time = time(0);
+ return intel_devices;
+}
- for (dev = devices; dev; dev = dev->next)
- if (devpath_to_vendor(dev->path) == 0x8086) {
- ret = 1;
- break;
+/*
+ * PCI Expansion ROM Data Structure Format */
+struct pciExpDataStructFormat {
+ __u8 ver[4];
+ __u16 vendorID;
+ __u16 deviceID;
+ __u16 devListOffset;
+ __u16 pciDataStructLen;
+ __u8 pciDataStructRev;
+} __attribute__ ((packed));
+
+struct orom_entry *orom_entries;
+
+const struct orom_entry *get_orom_entry_by_device_id(__u16 dev_id)
+{
+ struct orom_entry *entry;
+ struct devid_list *devid;
+
+ for (entry = orom_entries; entry; entry = entry->next) {
+ for (devid = entry->devid_list; devid; devid = devid->next) {
+ if (devid->devid == dev_id)
+ return entry;
}
+ }
+
+ return NULL;
+}
+
+const struct imsm_orom *get_orom_by_device_id(__u16 dev_id)
+{
+ const struct orom_entry *entry = get_orom_entry_by_device_id(dev_id);
- free_sys_dev(&devices);
+ if (entry)
+ return &entry->orom;
- return ret;
+ return NULL;
}
+static struct orom_entry *add_orom(const struct imsm_orom *orom)
+{
+ struct orom_entry *list;
+ struct orom_entry *prev = NULL;
+
+ for (list = orom_entries; list; prev = list, list = list->next)
+ ;
+
+ list = xmalloc(sizeof(struct orom_entry));
+ list->orom = *orom;
+ list->devid_list = NULL;
+ list->next = NULL;
+
+ if (prev == NULL)
+ orom_entries = list;
+ else
+ prev->next = list;
-static struct imsm_orom imsm_orom;
-static int scan(const void *start, const void *end)
+ return list;
+}
+
+static void add_orom_device_id(struct orom_entry *entry, __u16 dev_id)
+{
+ struct devid_list *list;
+ struct devid_list *prev = NULL;
+
+ for (list = entry->devid_list; list; prev = list, list = list->next) {
+ if (list->devid == dev_id)
+ return;
+ }
+ list = xmalloc(sizeof(struct devid_list));
+ list->devid = dev_id;
+ list->next = NULL;
+
+ if (prev == NULL)
+ entry->devid_list = list;
+ else
+ prev->next = list;
+}
+
+static int scan(const void *start, const void *end, const void *data)
{
int offset;
- const struct imsm_orom *imsm_mem;
+ const struct imsm_orom *imsm_mem = NULL;
int len = (end - start);
+ struct pciExpDataStructFormat *ptr= (struct pciExpDataStructFormat *)data;
+
+ if (data + 0x18 > end) {
+ dprintf("cannot find pciExpDataStruct \n");
+ return 0;
+ }
+
+ dprintf("ptr->vendorID: %lx __le16_to_cpu(ptr->deviceID): %lx \n",
+ (ulong) __le16_to_cpu(ptr->vendorID),
+ (ulong) __le16_to_cpu(ptr->deviceID));
+
+ if (__le16_to_cpu(ptr->vendorID) != 0x8086)
+ return 0;
+
+ if (get_orom_by_device_id(ptr->deviceID))
+ return 0;
for (offset = 0; offset < len; offset += 4) {
- imsm_mem = start + offset;
- if (memcmp(imsm_mem->signature, "$VER", 4) == 0) {
- imsm_orom = *imsm_mem;
- return 1;
+ const void *mem = start + offset;
+
+ if ((memcmp(mem, IMSM_OROM_SIGNATURE, 4) == 0)) {
+ imsm_mem = mem;
+ break;
}
}
+ if (!imsm_mem)
+ return 0;
+
+ struct orom_entry *orom = add_orom(imsm_mem);
+
+ /* only PciDataStructure with revision 3 and above supports devices list. */
+ if (ptr->pciDataStructRev >= 3 && ptr->devListOffset) {
+ const __u16 *dev_list = (void *)ptr + ptr->devListOffset;
+ int i;
+
+ for (i = 0; dev_list[i] != 0; i++)
+ add_orom_device_id(orom, dev_list[i]);
+ } else {
+ add_orom_device_id(orom, __le16_to_cpu(ptr->deviceID));
+ }
+
return 0;
}
-const struct imsm_orom *find_imsm_orom(void)
+const struct imsm_orom *imsm_platform_test(struct sys_dev *hba)
+{
+ struct imsm_orom orom = {
+ .signature = IMSM_OROM_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 |
+ IMSM_OROM_SSS_256kB | IMSM_OROM_SSS_512kB |
+ IMSM_OROM_SSS_1MB | IMSM_OROM_SSS_2MB,
+ .dpa = IMSM_OROM_DISKS_PER_ARRAY,
+ .tds = IMSM_OROM_TOTAL_DISKS,
+ .vpa = IMSM_OROM_VOLUMES_PER_ARRAY,
+ .vphba = IMSM_OROM_VOLUMES_PER_HBA
+ };
+ orom.attr = orom.rlc | IMSM_OROM_ATTR_ChecksumVerify;
+
+ if (check_env("IMSM_TEST_OROM_NORAID5")) {
+ orom.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
+ IMSM_OROM_RLC_RAID10;
+ }
+ if (check_env("IMSM_TEST_AHCI_EFI_NORAID5") && (hba->type == SYS_DEV_SAS)) {
+ orom.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
+ IMSM_OROM_RLC_RAID10;
+ }
+ if (check_env("IMSM_TEST_SCU_EFI_NORAID5") && (hba->type == SYS_DEV_SATA)) {
+ orom.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
+ IMSM_OROM_RLC_RAID10;
+ }
+
+ struct orom_entry *ret = add_orom(&orom);
+
+ add_orom_device_id(ret, hba->dev_id);
+
+ return &ret->orom;
+}
+
+static const struct imsm_orom *find_imsm_hba_orom(struct sys_dev *hba)
{
- static int populated = 0;
unsigned long align;
- /* it's static data so we only need to read it once */
- if (populated)
- return &imsm_orom;
-
- if (check_env("IMSM_TEST_OROM")) {
- memset(&imsm_orom, 0, sizeof(imsm_orom));
- imsm_orom.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
- IMSM_OROM_RLC_RAID10 | IMSM_OROM_RLC_RAID5;
- imsm_orom.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 |
- IMSM_OROM_SSS_256kB | IMSM_OROM_SSS_512kB |
- IMSM_OROM_SSS_1MB | IMSM_OROM_SSS_2MB;
- imsm_orom.dpa = 6;
- imsm_orom.tds = 6;
- imsm_orom.vpa = 2;
- imsm_orom.vphba = 4;
- imsm_orom.attr = imsm_orom.rlc | IMSM_OROM_ATTR_ChecksumVerify;
- populated = 1;
- return &imsm_orom;
- }
+ 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 (!platform_has_intel_ahci())
+ if (intel_devices == NULL)
return NULL;
/* scan option-rom memory looking for an imsm signature */
if (probe_roms_init(align) != 0)
return NULL;
probe_roms();
- populated = scan_adapter_roms(scan);
+ /* ignore return value - True is returned if both adapater roms are found */
+ scan_adapter_roms(scan);
probe_roms_exit();
- if (populated)
- return &imsm_orom;
+ 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));
+
+ 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 device[46];
sprintf(device, "/sys/dev/block/%d:%d/device", major(dev), minor(dev));
- return canonicalize_file_name(device);
+ return realpath(device, NULL);
}
-static char *diskfd_to_devpath(int fd)
+char *diskfd_to_devpath(int fd)
{
/* return the device path for a disk, return NULL on error or fd
* refers to a partition
{
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
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;
+}
projects / thirdparty / mdadm.git / blobdiff