--- /dev/null
+/*
+ * 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/>.
+ *
+ */
+
+#include "fix_coverity.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <stdint.h>
+#include <unistd.h>
+
+#include "efiboot.h"
+
+/*
+ * support NVDIMM-P (pmem / btt) devices
+ * (does not include NVDIMM-${ANYTHING_ELSE})
+ *
+ * /sys/dev/block/$major:$minor looks like:
+ * 259:0 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region9/btt9.0/block/pmem9s
+ * 259:1 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region11/btt11.0/block/pmem11s
+ * 259:3 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region11/btt11.0/block/pmem11s/pmem11s1
+ *
+ * /sys/dev/block/259:0/device looks like:
+ * device -> ../../../btt9.0
+ * /sys/dev/block/259:1/device looks like:
+ * device -> ../../../btt11.0
+ *
+ * /sys/dev/block/259:1/partition looks like:
+ * $ cat partition
+ * 1
+ *
+ * /sys/dev/block/259:0/uuid looks like:
+ * $ cat uuid
+ * 6e54091e-7476-47ac-824b-b6dd69878661
+ *
+ * pmem12s -> ../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/btt12.1/block/pmem12s
+ * dev: 259:0
+ * device -> ../../../btt12.1
+ * device/uuid: 0cee166e-dd56-4bc2-99d2-2544b69025b8
+ * 259:0 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/btt12.1/block/pmem12s
+ *
+ * pmem12.1s -> ../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/btt12.2/block/pmem12.1s
+ * dev: 259:1
+ * device -> ../../../btt12.2
+ * device/uuid: 78d94521-91f7-47db-b3a7-51b764281940
+ * 259:1 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/btt12.2/block/pmem12.1s
+ *
+ * pmem12.2 -> ../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/pfn12.1/block/pmem12.2
+ * dev: 259:2
+ * device -> ../../../pfn12.1
+ * device/uuid: 829c5205-89a5-4581-9819-df7d7754c622
+ * 259:2 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/pfn12.1/block/pmem12.2
+ */
+
+static ssize_t
+parse_pmem(struct device *dev, const char *current)
+{
+ uint8_t *filebuf = NULL;
+ uint8_t system, sysbus, acpi_id;
+ uint16_t pnp_id;
+ int ndbus, region, btt_region_id, btt_id, rc, pos;
+
+ debug(DEBUG, "entry");
+
+ if (!strcmp(dev->driver, "nd_pmem")) {
+ ;
+#if 0 /* dunno */
+ } else if (!strcmp(dev->driver, "nd_blk")) {
+ /* dunno */
+ dev->inteface_type = scsi;
+#endif
+ } else {
+ /*
+ * not a pmem device
+ */
+ return 0;
+ }
+
+ /*
+ * We're not actually using any of the values here except pos (our
+ * return value), but rather just being paranoid that this is the sort
+ * of device we care about.
+ *
+ * 259:0 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/btt12.1/block/pmem12s
+ */
+ rc = sscanf(current,
+ "../../devices/LNXSYSTM:%hhx/LNXSYBUS:%hhx/ACPI%hx:%hhx/ndbus%d/region%d/btt%d.%d/%n",
+ &system, &sysbus, &pnp_id, &acpi_id, &ndbus, ®ion,
+ &btt_region_id, &btt_id, &pos);
+ if (rc < 8)
+ return 0;
+
+ /*
+ * but the UUID we really do need to have.
+ */
+ rc = read_sysfs_file(&filebuf,
+ "class/block/%s/device/uuid", dev->disk_name);
+ if ((rc < 0 && errno == ENOENT) || filebuf == NULL)
+ return -1;
+
+ rc = efi_str_to_guid((char *)filebuf, &dev->nvdimm_label);
+ if (rc < 0)
+ return -1;
+
+ /* UUIDs are stored opposite Endian from GUIDs, so our normal GUID
+ * parser is giving us the wrong thing; swizzle those bytes around.
+ */
+ swizzle_guid_to_uuid(&dev->nvdimm_label);
+
+ dev->interface_type = nd_pmem;
+
+ return pos;
+}
+
+static ssize_t
+dp_create_pmem(struct device *dev,
+ uint8_t *buf, ssize_t size, ssize_t off)
+{
+ ssize_t sz;
+
+ debug(DEBUG, "entry");
+
+ sz = efidp_make_nvdimm(buf + off, size ? size - off : 0,
+ &dev->nvdimm_label);
+
+ return sz;
+}
+
+enum interface_type pmem_iftypes[] = { nd_pmem, unknown };
+
+struct dev_probe HIDDEN pmem_parser = {
+ .name = "pmem",
+ .iftypes = pmem_iftypes,
+ .flags = DEV_PROVIDES_ROOT|DEV_PROVIDES_HD,
+ .parse = parse_pmem,
+ .create = dp_create_pmem,
+};
* If there's a better way to figure this out, it'd be good, because
* I don't want to have to change this for every new disk type...
*/
- if (!strncmp(ultimate, "pmem", 4)) {
- if (!info->disk_name) {
- info->disk_name = strdup(ultimate);
- if (!info->disk_name)
- return -1;
- }
- } else if (!strcmp(penultimate, "block")) {
+ if (!strcmp(penultimate, "block")) {
if (!info->disk_name) {
info->disk_name = strdup(ultimate);
if (!info->disk_name)
return 0;
}
-/* NVDIMM-P paths */
-static int
-sysfs_test_pmem(const char *buf)
-{
- char *driverbuf = NULL;
- int rc;
-
- rc = sysfs_readlink(&driverbuf,
- "dev/block/%s/device/driver", buf);
- if (rc < 0 || !driverbuf)
- return 0;
-
- char *driver = strrchr(driverbuf, '/');
- if (!driver || !*driver)
- return -1;
- driver+=1;
- if (!strcmp(driver, "nd_pmem"))
- return 1;
- return 0;
-}
-
-/* pmem12s -> ../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/btt12.1/block/pmem12s
- * dev: 259:0
- * device -> ../../../btt12.1
- * device/uuid: 0cee166e-dd56-4bc2-99d2-2544b69025b8
- * 259:0 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/btt12.1/block/pmem12s
- *
- * pmem12.1s -> ../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/btt12.2/block/pmem12.1s
- * dev: 259:1
- * device -> ../../../btt12.2
- * device/uuid: 78d94521-91f7-47db-b3a7-51b764281940
- * 259:1 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/btt12.2/block/pmem12.1s
- *
- * pmem12.2 -> ../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/pfn12.1/block/pmem12.2
- * dev: 259:2
- * device -> ../../../pfn12.1
- * device/uuid: 829c5205-89a5-4581-9819-df7d7754c622
- * 259:2 -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/pfn12.1/block/pmem12.2
- */
-static ssize_t
-sysfs_parse_pmem(uint8_t *buf, ssize_t size, ssize_t *off,
- const char *pbuf, ssize_t psize UNUSED,
- ssize_t *poff UNUSED, struct disk_info *info)
-{
- uint8_t *filebuf = NULL;
- int rc;
-
- rc = read_sysfs_file(&filebuf,
- "class/block/%s/device/uuid", pbuf);
- if ((rc < 0 && errno == ENOENT) || filebuf == NULL)
- return -1;
-
- rc = efi_str_to_guid((char *)filebuf, &info->nvdimm_label);
- if (rc < 0)
- return -1;
-
- /* UUIDs are stored opposite Endian from GUIDs, so our normal GUID
- * parser is giving us the wrong thing; swizzle those bytes around.
- */
- swizzle_guid_to_uuid(&info->nvdimm_label);
-
- *off = efidp_make_nvdimm(buf, size, &info->nvdimm_label);
- return *off;
-}
-
static ssize_t
make_pci_path(uint8_t *buf, ssize_t size, char *pathstr, ssize_t *pathoff)
{
return -1;
}
- /*
- * the sysfs path basically looks like one of:
- * ../../devices/pci$PCI_STUFF/$BLOCKDEV_STUFF/block/$DISK/$PART
- * ../../devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0012:00/ndbus0/region12/btt12.1/block/pmem12s
- */
- rc = sysfs_test_pmem(linkbuf+loff);
- if (rc < 0) {
- efi_error("sysfs_test_pmem(\"%s\") failed", linkbuf+loff);
- return -1;
- } else if (rc > 0) {
- ssize_t linksz=0;
- info->interface_type = nd_pmem;
- rc = sysfs_parse_pmem(buf+off, size?size-off:0, &sz,
- linkbuf+loff, PATH_MAX-off,
- &linksz, info);
- if (rc < 0)
- return -1;
- loff += linksz;
- off += sz;
- found = 1;
- }
-
if (!found) {
rc = sscanf(linkbuf+loff, "../../devices/%n", &lsz);
if (rc != 0) {
eb_disk_info_from_fd(int fd, struct disk_info *info)
{
struct stat buf;
- char *driver;
int rc;
memset(info, 0, sizeof *info);
return 1;
}
- rc = sysfs_readlink(&driver, "dev/block/%"PRIu64":%"PRIu32"/device/driver",
- info->major, info->minor);
- if (rc > 0) {
- char *last = strrchr(driver, '/');
- if (last) {
- if (!strcmp(last+1, "nd_pmem")) {
- info->interface_type = nd_pmem;
- return 0;
-#if 0 /* dunno */
- } else if (!strcmp(last+1, "nd_blk")) {
- /* dunno */
- info->inteface_type = scsi;
-#endif
- }
- }
- }
-
errno = ENOSYS;
return -1;
}
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