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1b2b98a87e
efivar/0013-Make-a-platform-ACPI-root-parser-separate-from-PCI-r.patch
Peter Jones 1b2b98a87e Update to efivar 36 
Add NVDIMM support
Re-written linux interface parser to handle how devices are
  partitioned better, and for cleaner code, with one file per device
  type.
lots of verbosity updates
better CI
analysis with clang's analyzer as well as coverity
Better handling of immutable bits in sysfs
LIBEFIVAR_OPS=help
lots of code cleanups.

Signed-off-by: Peter Jones <pjones@redhat.com>
2018-09-17 17:12:53 -04:00

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From 6b62aa40cfa1feb924609a065098da98c99e925c Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Wed, 20 Jun 2018 14:45:14 -0400
Subject: [PATCH 13/34] Make a platform ACPI root parser separate from PCI
roots.
Because apparently PNP0A03 and PNP0A0C weren't good enough.
Signed-off-by: Peter Jones <pjones@redhat.com>
---
src/linux-acpi-root.c | 199 ++++++++++++++++++++++++++++++++++++++++++
src/linux-pci-root.c | 136 +++++++++++++++++++++++++++++
src/linux-pci.c | 1 -
src/linux.c | 4 +-
src/linux.h | 4 +-
5 files changed, 341 insertions(+), 3 deletions(-)
create mode 100644 src/linux-acpi-root.c
create mode 100644 src/linux-pci-root.c
diff --git a/src/linux-acpi-root.c b/src/linux-acpi-root.c
new file mode 100644
index 00000000000..c7d8276a642
--- /dev/null
+++ b/src/linux-acpi-root.c
@@ -0,0 +1,199 @@
+/*
+ * 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 for ACPI-like platform root hub and devices
+ *
+ * various devices /sys/dev/block/$major:$minor start with:
+ * maj:min -> ../../devices/ACPI0000:00/$PCI_DEVICES/$BLOCKDEV_STUFF/block/$DISK/$PART
+ * i.e.: APMC0D0D:00/ata1/host0/target0:0:0/0:0:0:0/block/sda
+ * ^ root hub ^blockdev stuff
+ * or:
+ * maj:min -> ../../devices/ACPI0000:00/$PCI_DEVICES/$BLOCKDEV_STUFF/block/$DISK/$PART
+ * i.e.: APMC0D0D:00/0000:00:1d.0/0000:05:00.0/ata1/host0/target0:0:0/0:0:0:0/block/sda
+ * ^ root hub ^pci dev ^pci dev ^ blockdev stuff
+ */
+static ssize_t
+parse_acpi_root(struct device *dev, const char *current, const char *root UNUSED)
+{
+ int rc;
+ int pos;
+ uint16_t pad0;
+ uint8_t pad1;
+ char *acpi_header = NULL;
+ char *colon;
+
+ const char *devpart = current;
+ char *spaces;
+
+ pos = strlen(current);
+ spaces = alloca(pos+1);
+ memset(spaces, ' ', pos+1);
+ spaces[pos] = '\0';
+ pos = 0;
+
+ debug(DEBUG, "entry");
+
+ /*
+ * find the ACPI root dunno0 and dunno1; they basically look like:
+ * ABCD0000:00/
+ * ^d0 ^d1
+ * This is annoying because "/%04ms%h:%hhx/" won't bind from the right
+ * side in sscanf.
+ */
+ rc = sscanf(devpart, "../../devices/platform/%n", &pos);
+ debug(DEBUG, "devpart:\"%s\" rc:%d pos:%d", devpart, rc, pos);
+ if (rc != 0 || pos < 1)
+ return 0;
+ devpart += pos;
+
+ /*
+ * If it's too short to be A0000:00, it's not an ACPI string
+ */
+ if (strlen(devpart) < 8)
+ return 0;
+
+ colon = strchr(devpart, ':');
+ if (!colon)
+ return 0;
+ pos = colon - devpart;
+
+ /*
+ * If colon doesn't point at something between one of these:
+ * A0000:00 ACPI0000:00
+ * ^ 5 ^ 8
+ * Then it's not an ACPI string.
+ */
+ if (pos < 5 || pos > 8)
+ return 0;
+
+ dev->acpi_root.acpi_hid_str = strndup(devpart, pos + 1);
+ if (!dev->acpi_root.acpi_hid_str) {
+ efi_error("Could not allocate memory");
+ return -1;
+ }
+ dev->acpi_root.acpi_hid_str[pos] = 0;
+ debug(DEBUG, "acpi_hid_str:\"%s\"", dev->acpi_root.acpi_hid_str);
+
+ pos -= 4;
+ debug(DEBUG, "devpart:\"%s\" rc:%d pos:%d", devpart, rc, pos);
+ acpi_header = strndupa(devpart, pos);
+ if (!acpi_header)
+ return 0;
+ acpi_header[pos] = 0;
+ debug(DEBUG, "devpart:\"%s\" acpi_header:\"%s\"", devpart, acpi_header);
+ devpart += pos;
+
+ /*
+ * If we can't find these numbers, it's not an ACPI string
+ */
+ rc = sscanf(devpart, "%hx:%hhx/%n", &pad0, &pad1, &pos);
+ if (rc != 2) {
+ efi_error("Could not parse ACPI path \"%s\"", devpart);
+ return 0;
+ }
+ debug(DEBUG, "devpart:\"%s\" parsed:%04hx:%02hhx pos:%d rc:%d",
+ devpart, pad0, pad1, pos, rc);
+
+ devpart += pos;
+
+ rc = parse_acpi_hid_uid(dev, "devices/platform/%s%04hX:%02hhX",
+ acpi_header, pad0, pad1);
+ debug(DEBUG, "rc:%d acpi_header:%s pad0:%04hX pad1:%02hhX",
+ rc, acpi_header, pad0, pad1);
+ if (rc < 0 && errno == ENOENT) {
+ rc = parse_acpi_hid_uid(dev, "devices/platform/%s%04hx:%02hhx",
+ acpi_header, pad0, pad1);
+ debug(DEBUG, "rc:%d acpi_header:%s pad0:%04hx pad1:%02hhx",
+ rc, acpi_header, pad0, pad1);
+ }
+ if (rc < 0) {
+ efi_error("Could not parse hid/uid");
+ return rc;
+ }
+ debug(DEBUG, "Parsed HID:0x%08x UID:0x%"PRIx64" uidstr:\"%s\" path:\"%s\"",
+ dev->acpi_root.acpi_hid, dev->acpi_root.acpi_uid,
+ dev->acpi_root.acpi_uid_str,
+ dev->acpi_root.acpi_cid_str);
+
+ return devpart - current;
+}
+
+static ssize_t
+dp_create_acpi_root(struct device *dev,
+ uint8_t *buf, ssize_t size, ssize_t off)
+{
+ ssize_t sz = 0, new = 0;
+
+ debug(DEBUG, "entry buf:%p size:%zd off:%zd", buf, size, off);
+
+ if (dev->acpi_root.acpi_uid_str || dev->acpi_root.acpi_cid_str) {
+ debug(DEBUG, "creating acpi_hid_ex dp hid:0x%08x uid:0x%"PRIx64" uidstr:\"%s\" cidstr:\"%s\"",
+ dev->acpi_root.acpi_hid, dev->acpi_root.acpi_uid,
+ dev->acpi_root.acpi_uid_str, dev->acpi_root.acpi_cid_str);
+ new = efidp_make_acpi_hid_ex(buf + off, size ? size - off : 0,
+ dev->acpi_root.acpi_hid,
+ dev->acpi_root.acpi_uid,
+ dev->acpi_root.acpi_cid,
+ dev->acpi_root.acpi_hid_str,
+ dev->acpi_root.acpi_uid_str,
+ dev->acpi_root.acpi_cid_str);
+ if (new < 0) {
+ efi_error("efidp_make_acpi_hid_ex() failed");
+ return new;
+ }
+ } else {
+ debug(DEBUG, "creating acpi_hid dp hid:0x%08x uid:0x%0"PRIx64,
+ dev->acpi_root.acpi_hid,
+ dev->acpi_root.acpi_uid);
+ new = efidp_make_acpi_hid(buf + off, size ? size - off : 0,
+ dev->acpi_root.acpi_hid,
+ dev->acpi_root.acpi_uid);
+ if (new < 0) {
+ efi_error("efidp_make_acpi_hid() failed");
+ return new;
+ }
+ }
+ off += new;
+ sz += new;
+
+ debug(DEBUG, "returning %zd", sz);
+ return sz;
+}
+
+enum interface_type acpi_root_iftypes[] = { acpi_root, unknown };
+
+struct dev_probe HIDDEN acpi_root_parser = {
+ .name = "acpi_root",
+ .iftypes = acpi_root_iftypes,
+ .flags = DEV_PROVIDES_ROOT,
+ .parse = parse_acpi_root,
+ .create = dp_create_acpi_root,
+};
diff --git a/src/linux-pci-root.c b/src/linux-pci-root.c
new file mode 100644
index 00000000000..8f556a066f3
--- /dev/null
+++ b/src/linux-pci-root.c
@@ -0,0 +1,136 @@
+/*
+ * 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 for PCI root hub and devices
+ *
+ * various devices /sys/dev/block/$major:$minor start with:
+ * maj:min -> ../../devices/pci$PCIROOT/$PCI_DEVICES/$BLOCKDEV_STUFF/block/$DISK/$PART
+ * i.e.: pci0000:00/0000:00:1d.0/0000:05:00.0/
+ * ^ root hub ^device ^device
+ *
+ * for network devices, we also get:
+ * /sys/class/net/$IFACE -> ../../devices/$PCI_STUFF/net/$IFACE
+ *
+ */
+static ssize_t
+parse_pci_root(struct device *dev, const char *current, const char *root UNUSED)
+{
+ int rc;
+ int pos;
+ uint16_t root_domain;
+ uint8_t root_bus;
+ const char *devpart = current;
+ char *spaces;
+
+ pos = strlen(current);
+ spaces = alloca(pos+1);
+ memset(spaces, ' ', pos+1);
+ spaces[pos] = '\0';
+ pos = 0;
+
+ debug(DEBUG, "entry");
+
+ /*
+ * find the pci root domain and port; they basically look like:
+ * pci0000:00/
+ * ^d ^p
+ */
+ rc = sscanf(devpart, "../../devices/pci%hx:%hhx/%n", &root_domain, &root_bus, &pos);
+ /*
+ * If we can't find that, it's not a PCI device.
+ */
+ if (rc != 2)
+ return 0;
+ devpart += pos;
+
+ dev->pci_root.pci_domain = root_domain;
+ dev->pci_root.pci_bus = root_bus;
+
+ rc = parse_acpi_hid_uid(dev, "devices/pci%04hx:%02hhx",
+ root_domain, root_bus);
+ if (rc < 0)
+ return -1;
+
+ errno = 0;
+ return devpart - current;
+}
+
+static ssize_t
+dp_create_pci_root(struct device *dev UNUSED,
+ uint8_t *buf, ssize_t size, ssize_t off)
+{
+ debug(DEBUG, "entry buf:%p size:%zd off:%zd", buf, size, off);
+ debug(DEBUG, "returning 0");
+#if 0
+ if (dev->acpi_root.acpi_uid_str) {
+ debug(DEBUG, "creating acpi_hid_ex dp hid:0x%08x uid:\"%s\"",
+ dev->acpi_root.acpi_hid,
+ dev->acpi_root.acpi_uid_str);
+ new = efidp_make_acpi_hid_ex(buf + off, size ? size - off : 0,
+ dev->acpi_root.acpi_hid,
+ 0, 0, "",
+ dev->acpi_root.acpi_uid_str,
+ "");
+ if (new < 0) {
+ efi_error("efidp_make_acpi_hid_ex() failed");
+ return new;
+ }
+ } else {
+ debug(DEBUG, "creating acpi_hid dp hid:0x%08x uid:0x%0"PRIx64,
+ dev->acpi_root.acpi_hid,
+ dev->acpi_root.acpi_uid);
+ new = efidp_make_acpi_hid(buf + off, size ? size - off : 0,
+ dev->acpi_root.acpi_hid,
+ dev->acpi_root.acpi_uid);
+ if (new < 0) {
+ efi_error("efidp_make_acpi_hid() failed");
+ return new;
+ }
+ }
+ off += new;
+ sz += new;
+
+ debug(DEBUG, "returning %zd", sz);
+ return sz;
+#else
+ return 0;
+#endif
+}
+
+enum interface_type pci_root_iftypes[] = { pci_root, unknown };
+
+struct dev_probe HIDDEN pci_root_parser = {
+ .name = "pci_root",
+ .iftypes = pci_root_iftypes,
+ .flags = DEV_PROVIDES_ROOT,
+ .parse = parse_pci_root,
+ .create = dp_create_pci_root,
+};
diff --git a/src/linux-pci.c b/src/linux-pci.c
index aa3e40c0f7c..0f59d3e840d 100644
--- a/src/linux-pci.c
+++ b/src/linux-pci.c
@@ -147,7 +147,6 @@ enum interface_type pci_iftypes[] = { pci, unknown };
struct dev_probe HIDDEN pci_parser = {
.name = "pci",
.iftypes = pci_iftypes,
- .flags = DEV_PROVIDES_ROOT,
.parse = parse_pci,
.create = dp_create_pci,
};
diff --git a/src/linux.c b/src/linux.c
index 9f3a22f7025..436fb882a98 100644
--- a/src/linux.c
+++ b/src/linux.c
@@ -235,6 +235,8 @@ static struct dev_probe *dev_probes[] = {
* be found first.
*/
&pmem_parser,
+ &acpi_root_parser,
+ &pci_root_parser,
&pci_parser,
&virtblk_parser,
&sas_parser,
@@ -447,7 +449,7 @@ struct device HIDDEN
}
debug(DEBUG, "%s matched %s", probe->name, current);
- if (probe->flags & DEV_PROVIDES_HD)
+ if (probe->flags & DEV_PROVIDES_HD || probe->flags & DEV_PROVIDES_ROOT)
needs_root = false;
dev->probes[n++] = dev_probes[i];
current += pos;
diff --git a/src/linux.h b/src/linux.h
index aa9e3d14a83..7b18bda31c6 100644
--- a/src/linux.h
+++ b/src/linux.h
@@ -95,7 +95,7 @@ struct nvdimm_info {
enum interface_type {
unknown,
- isa, pci, network,
+ isa, acpi_root, pci_root, pci, network,
ata, atapi, scsi, sata, sas,
usb, i1394, fibre, i2o,
md, virtblk,
@@ -264,6 +264,8 @@ extern ssize_t parse_scsi_link(const char *current, uint32_t *host,
/* device support implementations */
extern struct dev_probe pmem_parser;
+extern struct dev_probe pci_root_parser;
+extern struct dev_probe acpi_root_parser;
extern struct dev_probe pci_parser;
extern struct dev_probe sas_parser;
extern struct dev_probe sata_parser;
--
2.17.1
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