Package: efivar / 37-6

0004-Handle-sys-devices-virtual-nvme-fabrics-nvme-subsyst.patch Patch series | download
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From c41da0bdce04ab0f99b992d51ff6fd0ab55d040a Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Wed, 2 Oct 2019 17:04:12 -0400
Subject: [PATCH] Handle /sys/devices/virtual/{nvme-fabrics,nvme-subsystem}
 devices

Signed-off-by: Peter Jones <pjones@redhat.com>

[ dannf: Context adjustments due to upstream whitespace cleanup and
  dbgmk() calls;
  drop new calls to dbgmk() - it didn't exist in v37 ]

Bug-Ubuntu: https://bugs.launchpad.net/bugs/1891718
Bug: https://github.com/rhboot/efivar/issues/157
Origin: upstream, https://github.com/rhboot/efivar/commit/c41da0bdce04ab0f99b992d51ff6fd0ab55d040a
Last-Updated: 2020-09-30

Index: efivar-37/src/linux-nvme.c
===================================================================
--- efivar-37.orig/src/linux-nvme.c
+++ efivar-37/src/linux-nvme.c
@@ -15,7 +15,6 @@
  * 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"
@@ -35,6 +34,12 @@
  * /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
+ * or:
+ * 259:0 ->../../devices/virtual/nvme-fabrics/ctl/nvme0/nvme0n1
+ * 259:1 ->../../devices/virtual/nvme-fabrics/ctl/nvme0/nvme0n1/nvme0n1p1
+ * or:
+ * 259:5 -> ../../devices/virtual/nvme-subsystem/nvme-subsys0/nvme0n1
+ * 259:6 -> ../../devices/virtual/nvme-subsystem/nvme-subsys0/nvme0n1/nvme0n1p1
  *
  * /sys/dev/block/259:0/device looks like:
  * device -> ../../nvme0
@@ -56,14 +61,41 @@ parse_nvme(struct device *dev, const cha
         int32_t tosser0, tosser1, tosser2, ctrl_id, ns_id, partition;
         uint8_t *filebuf = NULL;
 	int pos0 = -1, pos1 = -1, pos2 = -1;
+	ssize_t sz = 0;
+	struct subdir {
+		const char * const name;
+		const char * const fmt;
+		int *pos0, *pos1;
+	} subdirs[] = {
+		{"nvme-subsysN/", "%nnvme-subsys%d/%n", &pos0, &pos2},
+		{"ctl/", "%nctl/%n%n", &pos0, &pos1},
+		{"nvme/", "%nnvme/%n%n", &pos0, &pos1},
+		{NULL, }
+	};
 
         debug("entry");
 
-        debug("searching for nvme/nvme0/nvme0n1 or nvme/nvme0/nvme0n1/nvme0n1p1");
-	rc = sscanf(current, "%nnvme/nvme%d/nvme%dn%d%n/nvme%dn%dp%d%n",
-	            &pos0, &tosser0, &ctrl_id, &ns_id,
-		    &pos1, &tosser1, &tosser2, &partition, &pos2);
-	debug("current:\"%s\" rc:%d pos0:%d pos1:%d pos2:%d\n", current, rc, pos0, pos1, pos2);
+	/*
+	 * in this case, *any* of these is okay.
+	 */
+	for (int i = 0; subdirs[i].name; i++) {
+		debug("searching for %s", subdirs[i].name);
+		pos0 = tosser0 = pos1 = -1;
+		rc = sscanf(current, subdirs[i].fmt, &pos0, &pos1, &pos2);
+		debug("current:'%s' rc:%d pos0:%d pos1:%d\n", current, rc,
+		      *subdirs[i].pos0, *subdirs[i].pos1);
+		if (*subdirs[i].pos0 >= 0 && *subdirs[i].pos1 >= *subdirs[i].pos0) {
+			sz += *subdirs[i].pos1;
+			current += *subdirs[i].pos1;
+			break;
+		}
+	}
+
+	debug("searching for nvme0/nvme0n1 or nvme0/nvme0n1/nvme0n1p1");
+	rc = sscanf(current, "%nnvme%d/nvme%dn%d%n/nvme%dn%dp%d%n",
+	            &pos0, &tosser0, &ctrl_id, &ns_id, &pos1,
+	            &tosser1, &tosser2, &partition, &pos2);
+	debug("current:'%s' rc:%d pos0:%d pos1:%d pos2:%d\n", current, rc, pos0, pos1, pos2);
         /*
          * If it isn't of that form, it's not one of our nvme devices.
          */
@@ -81,13 +113,15 @@ parse_nvme(struct device *dev, const cha
                 if (dev->part == -1)
                         dev->part = partition;
 
-	        pos1 = pos2;
+		pos1 = pos2;
         }
+
 	current += pos1;
 
         /*
          * now fish the eui out of sysfs is there is one...
          */
+	debug("looking for the eui");
 	char *euipath = NULL;
 	rc = read_sysfs_file(&filebuf, "class/block/nvme%dn%d/eui", ctrl_id, ns_id);
 	if (rc < 0 && (errno == ENOENT || errno == ENOTDIR)) {
@@ -110,6 +144,9 @@ parse_nvme(struct device *dev, const cha
                         errno = EINVAL;
                         return -1;
                 }
+		debug("eui is %02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
+		      eui[0], eui[1], eui[2], eui[3],
+		      eui[4], eui[5], eui[6], eui[7]);
                 dev->nvme_info.has_eui = 1;
                 memcpy(dev->nvme_info.eui, eui, sizeof(eui));
         }
Index: efivar-37/src/linux-virtual-root.c
===================================================================
--- /dev/null
+++ efivar-37/src/linux-virtual-root.c
@@ -0,0 +1,87 @@
+/*
+ * libefiboot - library for the manipulation of EFI boot variables
+ * Copyright 2012-2019 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 virtually rooted devices (fibre+nvme, etc.)
+ *
+ * /sys/dev/block/$major:$minor looks like:
+ * 259:0 ->../../devices/virtual/nvme-fabrics/ctl/nvme0/nvme0n1
+ * 259:1 ->../../devices/virtual/nvme-fabrics/ctl/nvme0/nvme0n1/nvme0n1p1
+ * or:
+ * 259:5 -> ../../devices/virtual/nvme-subsystem/nvme-subsys0/nvme0n1
+ * 259:6 -> ../../devices/virtual/nvme-subsystem/nvme-subsys0/nvme0n1/nvme0n1p1
+ */
+
+static ssize_t
+parse_virtual_root(struct device *dev UNUSED, const char *current, const char *root UNUSED)
+{
+	int rc;
+	ssize_t sz;
+	int pos0 = 0, pos1 = 0;
+	struct subdir {
+		const char * const name;
+		const char * const fmt;
+	} subdirs[] = {
+		{"../../devices/virtual", "%n../../devices/virtual/%n"},
+		{"nvme-subsystem/", "%nnvme-subsystem/%n"},
+		{"nvme-fabrics/ctl/", "%nnvme-fabrics/ctl/%n"},
+		{NULL, NULL}
+	};
+
+	debug("entry");
+
+	for (int i = 0; subdirs[i].name; i++) {
+		debug("searching for %s", subdirs[i].name);
+		pos0 = pos1 = -1;
+		rc = sscanf(current, subdirs[i].fmt, &pos0, &pos1);
+		debug("current:'%s' rc:%d pos0:%d pos1:%d\n", current, rc, pos0, pos1);
+		if (rc == 1) {
+			sz += pos1;
+			current += pos1;
+			if (i > 0)
+				goto found;
+		}
+	}
+
+	sz = 0;
+found:
+	debug("current:'%s' sz:%zd\n", current, sz);
+	return sz;
+}
+
+static enum interface_type virtual_root_iftypes[] = { virtual_root, unknown };
+
+struct dev_probe HIDDEN virtual_root_parser = {
+	.name = "virtual_root",
+	.iftypes = virtual_root_iftypes,
+	.flags = DEV_ABBREV_ONLY|DEV_PROVIDES_ROOT,
+	.parse = parse_virtual_root,
+};
+
+// vim:fenc=utf-8:tw=75:noet
Index: efivar-37/src/linux.h
===================================================================
--- efivar-37.orig/src/linux.h
+++ efivar-37/src/linux.h
@@ -99,7 +99,8 @@ struct emmc_info {
 
 enum interface_type {
         unknown,
-        isa, acpi_root, pci_root, soc_root, pci, network,
+	isa, acpi_root, pci_root, soc_root, virtual_root,
+	pci, network,
         ata, atapi, scsi, sata, sas,
         usb, i1394, fibre, i2o,
         md, virtblk,
@@ -344,6 +345,7 @@ extern struct dev_probe pmem_parser;
 extern struct dev_probe pci_root_parser;
 extern struct dev_probe acpi_root_parser;
 extern struct dev_probe soc_root_parser;
+extern struct dev_probe virtual_root_parser;
 extern struct dev_probe pci_parser;
 extern struct dev_probe sas_parser;
 extern struct dev_probe sata_parser;
Index: efivar-37/src/linux.c
===================================================================
--- efivar-37.orig/src/linux.c
+++ efivar-37/src/linux.c
@@ -170,16 +170,17 @@ int HIDDEN
 set_disk_and_part_name(struct device *dev)
 {
 	int rc = -1;
-
-        /*
-         * results are like such:
-         * maj:min -> ../../devices/pci$PCI_STUFF/$BLOCKDEV_STUFF/block/$DISK/$PART
-         */
-
         char *ultimate = pathseg(dev->link, -1);
         char *penultimate = pathseg(dev->link, -2);
         char *approximate = pathseg(dev->link, -3);
         char *proximate = pathseg(dev->link, -4);
+	char *psl5 = pathseg(dev->link, -5);
+
+
+	/*
+	 * devlinks look something like:
+	 * maj:min -> ../../devices/pci$PCI_STUFF/$BLOCKDEV_STUFF/block/$DISK/$PART
+	 */
 
         errno = 0;
         debug("dev->disk_name:%p dev->part_name:%p", dev->disk_name, dev->part_name);
@@ -188,6 +189,7 @@ set_disk_and_part_name(struct device *de
         debug("penultimate:\"%s\"", penultimate ? : "");
         debug("approximate:\"%s\"", approximate ? : "");
         debug("proximate:\"%s\"", proximate ? : "");
+	debug("psl5:'%s'", psl5 ? : "");
 
         if (ultimate && penultimate &&
             ((proximate && !strcmp(proximate, "nvme")) ||
@@ -232,6 +234,34 @@ set_disk_and_part_name(struct device *de
                 set_disk_name(dev, "%s", ultimate);
                 debug("disk:%s", ultimate);
 		rc = 0;
+	} else if ((proximate && ultimate && !strcmp(proximate, "nvme-fabrics")) ||
+		    (approximate && ultimate && !strcmp(approximate, "nvme-subsystem"))) {
+		/*
+		 * 259:0 ->../../devices/virtual/nvme-fabrics/ctl/nvme0/nvme0n1
+		 *				 ^ proximate            ^ ultimate
+		 * or
+		 * 259:5 -> ../../devices/virtual/nvme-subsystem/nvme-subsys0/nvme0n1
+		 *                                ^ approximate  ^ penultimate
+		 *                                                   ultimate ^
+		 */
+		set_disk_name(dev, "%s", ultimate);
+		debug("disk:%s", ultimate);
+		rc = 0;
+	} else if ((psl5 && penultimate && ultimate && !strcmp(psl5, "nvme-fabrics")) ||
+		   (proximate && penultimate && ultimate && !strcmp(proximate, "nvme-subsystem"))) {
+		/*
+		 * 259:1 -> ../../devices/virtual/nvme-fabrics/ctl/nvme0/nvme0n1/nvme0n1p1
+		 *                                ^psl5                  ^ penultimate
+		 *                                                      ultimate ^
+		 * or
+		 * 259:6 -> ../../devices/virtual/nvme-subsystem/nvme-subsys0/nvme0n1/nvme0n1p1
+		 *                                ^ proximate                 ^ penultimate
+		 *                                                           ultimate ^
+		 */
+		set_disk_name(dev, "%s", penultimate);
+		set_part_name(dev, "%s", ultimate);
+		debug("disk:%s part:%s", penultimate, ultimate);
+		rc = 0;
         }
 
 	if (rc < 0)
@@ -248,6 +278,7 @@ static struct dev_probe *dev_probes[] =
         &acpi_root_parser,
         &pci_root_parser,
         &soc_root_parser,
+	&virtual_root_parser,
         &pci_parser,
         &virtblk_parser,
         &sas_parser,