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This won't actually *work* yet, because the infrastructure to use it (replacing "struct disk_info") won't land for a few more patches. Signed-off-by: Peter Jones <pjones@redhat.com>
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| /* | ||
| * libefiboot - library for the manipulation of EFI boot variables | ||
| * Copyright 2012-2018 Red Hat, Inc. | ||
| * | ||
| * This library is free software; you can redistribute it and/or | ||
| * modify it under the terms of the GNU Lesser General Public License as | ||
| * published by the Free Software Foundation; either version 2.1 of the | ||
| * License, or (at your option) any later version. | ||
| * | ||
| * This library is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| * Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public | ||
| * License along with this library; if not, see | ||
| * <http://www.gnu.org/licenses/>. | ||
| * | ||
| */ | ||
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| #include "fix_coverity.h" | ||
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| #include <errno.h> | ||
| #include <fcntl.h> | ||
| #include <inttypes.h> | ||
| #include <stdint.h> | ||
| #include <unistd.h> | ||
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| #include "efiboot.h" | ||
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| /* | ||
| * support for NVMe devices | ||
| * | ||
| * /sys/dev/block/$major:$minor looks like: | ||
| * 259:0 -> ../../devices/pci0000:00/0000:00:1d.0/0000:05:00.0/nvme/nvme0/nvme0n1 | ||
| * 259:1 -> ../../devices/pci0000:00/0000:00:1d.0/0000:05:00.0/nvme/nvme0/nvme0n1/nvme0n1p1 | ||
| * | ||
| * /sys/dev/block/259:0/device looks like: | ||
| * device -> ../../nvme0 | ||
| * | ||
| * /sys/dev/block/259:1/partition looks like: | ||
| * $ cat partition | ||
| * 1 | ||
| * | ||
| * /sys/class/block/nvme0n1/eui looks like: | ||
| * $ cat /sys/class/block/nvme0n1/eui | ||
| * 00 25 38 53 5a 16 1d a9 | ||
| */ | ||
|
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| static ssize_t | ||
| parse_nvme(struct device *dev, const char *current) | ||
| { | ||
| int rc; | ||
| int32_t tosser0, tosser1, tosser2, ctrl_id, ns_id, partition; | ||
| uint8_t *filebuf = NULL; | ||
| int pos0 = 0, pos1 = 0; | ||
| char *spaces; | ||
|
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| pos0 = strlen(current); | ||
| spaces = alloca(pos0+1); | ||
| memset(spaces, ' ', pos0+1); | ||
| spaces[pos0] = '\0'; | ||
| pos0 = 0; | ||
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| debug(DEBUG, "entry"); | ||
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| debug(DEBUG, "searching for nvme/nvme0/nvme0n1 or nvme/nvme0/nvme0n1/nvme0n1p1"); | ||
| rc = sscanf(current, "nvme/nvme%d/nvme%dn%d%n/nvme%dn%dp%d%n", | ||
| &tosser0, &ctrl_id, &ns_id, &pos0, | ||
| &tosser1, &tosser2, &partition, &pos1); | ||
| debug(DEBUG, "current:\"%s\" rc:%d pos0:%d pos1:%d\n", current, rc, pos0, pos1); | ||
| arrow(DEBUG, spaces, 9, pos0, rc, 3); | ||
| arrow(DEBUG, spaces, 9, pos1, rc, 6); | ||
| /* | ||
| * If it isn't of that form, it's not one of our nvme devices. | ||
| */ | ||
| if (rc != 3 && rc != 6) | ||
| return 0; | ||
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| dev->nvme_info.ctrl_id = ctrl_id; | ||
| dev->nvme_info.ns_id = ns_id; | ||
| dev->nvme_info.has_eui = 0; | ||
| dev->interface_type = nvme; | ||
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| if (rc == 6) { | ||
| if (dev->part == -1) | ||
| dev->part = partition; | ||
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| pos0 = pos1; | ||
| } | ||
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| /* | ||
| * now fish the eui out of sysfs is there is one... | ||
| */ | ||
| rc = read_sysfs_file(&filebuf, | ||
| "class/block/nvme%dn%d/eui", | ||
| ctrl_id, ns_id); | ||
| if ((rc < 0 && errno == ENOENT) || filebuf == NULL) { | ||
| rc = read_sysfs_file(&filebuf, | ||
| "class/block/nvme%dn%d/device/eui", | ||
| ctrl_id, ns_id); | ||
| } | ||
| if (rc >= 0 && filebuf != NULL) { | ||
| uint8_t eui[8]; | ||
| if (rc < 23) { | ||
| errno = EINVAL; | ||
| return -1; | ||
| } | ||
| rc = sscanf((char *)filebuf, | ||
| "%02hhx %02hhx %02hhx %02hhx " | ||
| "%02hhx %02hhx %02hhx %02hhx", | ||
| &eui[0], &eui[1], &eui[2], &eui[3], | ||
| &eui[4], &eui[5], &eui[6], &eui[7]); | ||
| if (rc < 8) { | ||
| errno = EINVAL; | ||
| return -1; | ||
| } | ||
| dev->nvme_info.has_eui = 1; | ||
| memcpy(dev->nvme_info.eui, eui, sizeof(eui)); | ||
| } else { | ||
| return -1; | ||
| } | ||
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| return pos0; | ||
| } | ||
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| static ssize_t | ||
| dp_create_nvme(struct device *dev, | ||
| uint8_t *buf, ssize_t size, ssize_t off) | ||
| { | ||
| ssize_t sz; | ||
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| debug(DEBUG, "entry"); | ||
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| sz = efidp_make_nvme(buf + off, size ? size - off : 0, | ||
| dev->nvme_info.ns_id, | ||
| dev->nvme_info.has_eui ? dev->nvme_info.eui | ||
| : NULL); | ||
| return sz; | ||
| } | ||
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| static char * | ||
| make_part_name(struct device *dev) | ||
| { | ||
| char *ret = NULL; | ||
| ssize_t rc; | ||
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| if (dev->part < 1) | ||
| return NULL; | ||
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| rc = asprintf(&ret, "%sp%d", dev->disk_name, dev->part); | ||
| if (rc < 0) { | ||
| efi_error("could not allocate memory"); | ||
| return NULL; | ||
| } | ||
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| return ret; | ||
| } | ||
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| static enum interface_type nvme_iftypes[] = { nvme, unknown }; | ||
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| struct dev_probe HIDDEN nvme_parser = { | ||
| .name = "nvme", | ||
| .iftypes = nvme_iftypes, | ||
| .flags = DEV_PROVIDES_HD, | ||
| .parse = parse_nvme, | ||
| .create = dp_create_nvme, | ||
| .make_part_name = make_part_name, | ||
| }; | ||
|
|
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