| /* |
| * Intel(R) Matrix Storage Manager hardware and firmware support routines |
| * |
| * Copyright (C) 2008 Intel Corporation |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| */ |
| #include "mdadm.h" |
| #include "platform-intel.h" |
| #include "probe_roms.h" |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <dirent.h> |
| #include <fcntl.h> |
| #include <sys/mman.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <limits.h> |
| |
| #define NVME_SUBSYS_PATH "/sys/devices/virtual/nvme-subsystem/" |
| |
| 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; |
| |
| if ((*list)->path) |
| free((*list)->path); |
| free(*list); |
| *list = next; |
| } |
| } |
| |
| struct sys_dev *find_driver_devices(const char *bus, const char *driver) |
| { |
| /* search sysfs for devices driven by 'driver' */ |
| 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 (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' |
| */ |
| sprintf(path, "/sys/bus/%s/drivers/%s/%s/subsystem", |
| bus, driver, de->d_name); |
| n = readlink(path, link, sizeof(link)); |
| if (n < 0 || n >= (int)sizeof(link)) |
| continue; |
| link[n] = '\0'; |
| c = strrchr(link, '/'); |
| if (!c) |
| continue; |
| 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 = xmalloc(sizeof(*head)); |
| list = head; |
| } else { |
| list->next = xmalloc(sizeof(*head)); |
| list = list->next; |
| } |
| |
| if (!list) { |
| free_sys_dev(&head); |
| break; |
| } |
| |
| 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]; |
| char vendor[7]; |
| int fd; |
| __u16 id = 0xffff; |
| int n; |
| |
| sprintf(path, "%s/vendor", dev_path); |
| |
| fd = open(path, O_RDONLY); |
| if (fd < 0) |
| return 0xffff; |
| |
| n = read(fd, vendor, sizeof(vendor)); |
| if (n == sizeof(vendor)) { |
| vendor[n - 1] = '\0'; |
| id = strtoul(vendor, NULL, 16); |
| } |
| close(fd); |
| |
| return id; |
| } |
| |
| struct sys_dev *find_intel_devices(void) |
| { |
| 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; |
| } |
| |
| /* |
| * 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); |
| |
| if (entry) |
| return &entry->orom; |
| |
| 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; |
| |
| 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 = 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) { |
| 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 *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) |
| { |
| 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_TSATA_PROP "RsttSatV" |
| #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, |
| const 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, |
| const 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; |
| static const char * const sata_efivars[] = {AHCI_PROP, AHCI_SSATA_PROP, |
| AHCI_TSATA_PROP}; |
| unsigned long i; |
| |
| 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; |
| |
| switch (hba->type) { |
| case SYS_DEV_SAS: |
| if (!read_efi_variable(&orom, sizeof(orom), SCU_PROP, |
| VENDOR_GUID)) |
| break; |
| |
| return NULL; |
| case SYS_DEV_SATA: |
| if (hba->class != PCI_CLASS_RAID_CNTRL) |
| return NULL; |
| |
| for (i = 0; i < ARRAY_SIZE(sata_efivars); i++) { |
| if (!read_efi_variable(&orom, sizeof(orom), |
| sata_efivars[i], VENDOR_GUID)) |
| break; |
| |
| } |
| if (i == ARRAY_SIZE(sata_efivars)) |
| return NULL; |
| |
| break; |
| case SYS_DEV_VMD: |
| if (!read_efi_variable(&orom, sizeof(orom), VMD_PROP, |
| VENDOR_GUID)) |
| break; |
| return NULL; |
| default: |
| 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; |
| } |
| |
| /* Check whether the nvme device is represented by nvme subsytem, |
| * if yes virtual path should be changed to hardware device path, |
| * to allow IMSM capabilities detection. |
| * Returns: |
| * hardware path to device - if the device is represented via |
| * nvme virtual subsytem |
| * NULL - if the device is not represented via nvme virtual subsytem |
| */ |
| char *get_nvme_multipath_dev_hw_path(const char *dev_path) |
| { |
| DIR *dir; |
| struct dirent *ent; |
| char *rp = NULL; |
| |
| if (strncmp(dev_path, NVME_SUBSYS_PATH, strlen(NVME_SUBSYS_PATH)) != 0) |
| return NULL; |
| |
| dir = opendir(dev_path); |
| if (!dir) |
| return NULL; |
| |
| for (ent = readdir(dir); ent; ent = readdir(dir)) { |
| char buf[strlen(dev_path) + strlen(ent->d_name) + 1]; |
| |
| /* Check if dir is a controller, ignore namespaces*/ |
| if (!(strncmp(ent->d_name, "nvme", 4) == 0) || |
| (strrchr(ent->d_name, 'n') != &ent->d_name[0])) |
| continue; |
| |
| sprintf(buf, "%s/%s", dev_path, ent->d_name); |
| rp = realpath(buf, NULL); |
| break; |
| } |
| |
| closedir(dir); |
| return rp; |
| } |
| |
| char *devt_to_devpath(dev_t dev) |
| { |
| char device[46]; |
| char *rp; |
| char *buf; |
| |
| sprintf(device, "/sys/dev/block/%d:%d/device", major(dev), minor(dev)); |
| |
| rp = realpath(device, NULL); |
| if (!rp) |
| return NULL; |
| |
| buf = get_nvme_multipath_dev_hw_path(rp); |
| if (buf) { |
| free(rp); |
| return buf; |
| } |
| |
| return rp; |
| } |
| |
| 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; |
| } |
| /* Verify that NVMe drive is supported by IMSM |
| * Returns: |
| * 0 - not supported |
| * 1 - supported |
| */ |
| int imsm_is_nvme_supported(int disk_fd, int verbose) |
| { |
| char nsid_path[PATH_MAX]; |
| char buf[PATH_MAX]; |
| struct stat stb; |
| |
| if (disk_fd < 0) |
| return 0; |
| |
| if (fstat(disk_fd, &stb)) |
| return 0; |
| |
| snprintf(nsid_path, PATH_MAX-1, "/sys/dev/block/%d:%d/nsid", |
| major(stb.st_rdev), minor(stb.st_rdev)); |
| |
| if (load_sys(nsid_path, buf, sizeof(buf))) { |
| pr_err("Cannot read %s, rejecting drive\n", nsid_path); |
| return 0; |
| } |
| if (strtoll(buf, NULL, 10) != 1) { |
| if (verbose) |
| pr_err("Only first namespace is supported by IMSM, aborting\n"); |
| return 0; |
| } |
| return 1; |
| } |
| |
| /* Verify if multipath is supported by NVMe controller |
| * Returns: |
| * 0 - not supported |
| * 1 - supported |
| */ |
| int is_multipath_nvme(int disk_fd) |
| { |
| char path_buf[PATH_MAX]; |
| char ns_path[PATH_MAX]; |
| char *kname = fd2kname(disk_fd); |
| |
| if (!kname) |
| return 0; |
| sprintf(path_buf, "/sys/block/%s", kname); |
| |
| if (!realpath(path_buf, ns_path)) |
| return 0; |
| |
| if (strncmp(ns_path, NVME_SUBSYS_PATH, strlen(NVME_SUBSYS_PATH)) == 0) |
| return 1; |
| |
| return 0; |
| } |