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SUSE:SLE-12-SP5:GA
qemu-linux-user.11145
0290-util-Add-UUID-API.patch
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File 0290-util-Add-UUID-API.patch of Package qemu-linux-user.11145
From 036194c2ca380985735785d36efa08c23cd22e4c Mon Sep 17 00:00:00 2001 From: Fam Zheng <famz@redhat.com> Date: Wed, 21 Sep 2016 12:27:14 +0800 Subject: [PATCH] util: Add UUID API A number of different places across the code base use CONFIG_UUID. Some of them are soft dependency, some are not built if libuuid is not available, some come with dummy fallback, some throws runtime error. It is hard to maintain, and hard to reason for users. Since UUID is a simple standard with only a small number of operations, it is cleaner to have a central support in libqemuutil. This patch adds qemu_uuid_* functions that all uuid users in the code base can rely on. Except for qemu_uuid_generate which is new code, all other functions are just copy from existing fallbacks from other files. Note that qemu_uuid_parse is moved without updating the function signature to use QemuUUID, to keep this patch simple. Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Jeff Cody <jcody@redhat.com> Message-Id: <1474432046-325-2-git-send-email-famz@redhat.com> (cherry picked from commit cea25275a3590cdee774a1230f4b99f6c5c0eaa8) [LD: BSC#1106222 CVE-2018-15746] Signed-off-by: Larry Dewey <ldewey@suse.com> --- arch_init.c | 19 --------- block/iscsi.c | 2 +- hw/smbios/smbios.c | 1 + include/qemu/uuid.h | 59 ++++++++++++++++++++++++++ include/sysemu/sysemu.h | 4 -- qmp.c | 1 + stubs/uuid.c | 2 +- util/Makefile.objs | 1 + util/uuid.c | 91 +++++++++++++++++++++++++++++++++++++++++ vl.c | 1 + 10 files changed, 156 insertions(+), 25 deletions(-) diff --git a/arch_init.c b/arch_init.c index e3bb1b3ac4..db4f3deacd 100644 --- a/arch_init.c +++ b/arch_init.c @@ -233,25 +233,6 @@ void audio_init(void) } } -int qemu_uuid_parse(const char *str, uint8_t *uuid) -{ - int ret; - - if (strlen(str) != 36) { - return -1; - } - - ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3], - &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9], - &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14], - &uuid[15]); - - if (ret != 16) { - return -1; - } - return 0; -} - void do_acpitable_option(const QemuOpts *opts) { #ifdef TARGET_I386 diff --git a/block/iscsi.c b/block/iscsi.c index 1f6a0e581a..4ce9daadb9 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -36,7 +36,7 @@ #include "block/block_int.h" #include "block/scsi.h" #include "qemu/iov.h" -#include "sysemu/sysemu.h" +#include "qemu/uuid.h" #include "qmp-commands.h" #include "qapi/qmp/qstring.h" #include "crypto/secret.h" diff --git a/hw/smbios/smbios.c b/hw/smbios/smbios.c index cb8a111102..95528188d9 100644 --- a/hw/smbios/smbios.c +++ b/hw/smbios/smbios.c @@ -20,6 +20,7 @@ #include "qemu/config-file.h" #include "qemu/error-report.h" #include "sysemu/sysemu.h" +#include "qemu/uuid.h" #include "sysemu/cpus.h" #include "hw/smbios/smbios.h" #include "hw/loader.h" diff --git a/include/qemu/uuid.h b/include/qemu/uuid.h new file mode 100644 index 0000000000..bc0601e65b --- /dev/null +++ b/include/qemu/uuid.h @@ -0,0 +1,59 @@ +/* + * QEMU UUID functions + * + * Copyright 2016 Red Hat, Inc. + * + * Authors: + * Fam Zheng <famz@redhat.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + */ + +#ifndef QEMU_UUID_H +#define QEMU_UUID_H + +#include "qemu-common.h" + +/* Version 4 UUID (pseudo random numbers), RFC4122 4.4. */ + +typedef struct { + union { + unsigned char data[16]; + struct { + /* Generated in BE endian, can be swapped with qemu_uuid_bswap. */ + uint32_t time_low; + uint16_t time_mid; + uint16_t time_high_and_version; + uint8_t clock_seq_and_reserved; + uint8_t clock_seq_low; + uint8_t node[6]; + } fields; + }; +} QemuUUID; + +#define UUID_FMT "%02hhx%02hhx%02hhx%02hhx-" \ + "%02hhx%02hhx-%02hhx%02hhx-" \ + "%02hhx%02hhx-" \ + "%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx" + +#define UUID_FMT_LEN 36 + +#define UUID_NONE "00000000-0000-0000-0000-000000000000" + +void qemu_uuid_generate(QemuUUID *out); + +int qemu_uuid_is_null(const QemuUUID *uu); + +void qemu_uuid_unparse(const QemuUUID *uuid, char *out); + +char *qemu_uuid_unparse_strdup(const QemuUUID *uuid); + +int qemu_uuid_parse(const char *str, uint8_t *uuid); + +void qemu_uuid_bswap(QemuUUID *uuid); + +#endif diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h index 38fb3cad35..505aab7afd 100644 --- a/include/sysemu/sysemu.h +++ b/include/sysemu/sysemu.h @@ -18,10 +18,6 @@ extern const char *bios_name; extern const char *qemu_name; extern uint8_t qemu_uuid[]; extern bool qemu_uuid_set; -int qemu_uuid_parse(const char *str, uint8_t *uuid); - -#define UUID_FMT "%02hhx%02hhx%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx" -#define UUID_NONE "00000000-0000-0000-0000-000000000000" bool runstate_check(RunState state); void runstate_set(RunState new_state); diff --git a/qmp.c b/qmp.c index 9d0953bc29..e8ed3fc910 100644 --- a/qmp.c +++ b/qmp.c @@ -17,6 +17,7 @@ #include "qemu/cutils.h" #include "monitor/monitor.h" #include "sysemu/sysemu.h" +#include "qemu/uuid.h" #include "qmp-commands.h" #include "sysemu/char.h" #include "ui/qemu-spice.h" diff --git a/stubs/uuid.c b/stubs/uuid.c index 92ad717831..a880de8d61 100644 --- a/stubs/uuid.c +++ b/stubs/uuid.c @@ -1,6 +1,6 @@ #include "qemu/osdep.h" #include "qemu-common.h" -#include "sysemu/sysemu.h" +#include "qemu/uuid.h" #include "qmp-commands.h" UuidInfo *qmp_query_uuid(Error **errp) diff --git a/util/Makefile.objs b/util/Makefile.objs index a8a777ec40..692750d0d3 100644 --- a/util/Makefile.objs +++ b/util/Makefile.objs @@ -20,6 +20,7 @@ util-obj-y += iov.o qemu-config.o qemu-sockets.o uri.o notify.o util-obj-y += qemu-option.o qemu-progress.o util-obj-y += hexdump.o util-obj-y += crc32c.o +util-obj-y += uuid.o util-obj-y += throttle.o util-obj-y += getauxval.o util-obj-y += readline.o diff --git a/util/uuid.c b/util/uuid.c new file mode 100644 index 0000000000..6815904435 --- /dev/null +++ b/util/uuid.c @@ -0,0 +1,91 @@ +/* + * QEMU UUID functions + * + * Copyright 2016 Red Hat, Inc. + * + * Authors: + * Fam Zheng <famz@redhat.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + */ + +#include "qemu/osdep.h" +#include "qemu-common.h" +#include "qemu/uuid.h" +#include "qemu/bswap.h" + +void qemu_uuid_generate(QemuUUID *uuid) +{ + int i; + uint32_t tmp[4]; + + QEMU_BUILD_BUG_ON(sizeof(QemuUUID) != 16); + + for (i = 0; i < 4; ++i) { + tmp[i] = g_random_int(); + } + memcpy(uuid, tmp, sizeof(tmp)); + /* Set the two most significant bits (bits 6 and 7) of the + clock_seq_hi_and_reserved to zero and one, respectively. */ + uuid->data[8] = (uuid->data[8] & 0x3f) | 0x80; + /* Set the four most significant bits (bits 12 through 15) of the + time_hi_and_version field to the 4-bit version number. + */ + uuid->data[6] = (uuid->data[6] & 0xf) | 0x40; +} + +int qemu_uuid_is_null(const QemuUUID *uu) +{ + QemuUUID null_uuid = { 0 }; + return memcmp(uu, &null_uuid, sizeof(QemuUUID)) == 0; +} + +void qemu_uuid_unparse(const QemuUUID *uuid, char *out) +{ + const unsigned char *uu = &uuid->data[0]; + snprintf(out, UUID_FMT_LEN + 1, UUID_FMT, + uu[0], uu[1], uu[2], uu[3], uu[4], uu[5], uu[6], uu[7], + uu[8], uu[9], uu[10], uu[11], uu[12], uu[13], uu[14], uu[15]); +} + +char *qemu_uuid_unparse_strdup(const QemuUUID *uuid) +{ + const unsigned char *uu = &uuid->data[0]; + return g_strdup_printf(UUID_FMT, + uu[0], uu[1], uu[2], uu[3], uu[4], uu[5], uu[6], + uu[7], uu[8], uu[9], uu[10], uu[11], uu[12], + uu[13], uu[14], uu[15]); +} + +int qemu_uuid_parse(const char *str, uint8_t *uuid) +{ + int ret; + + if (strlen(str) != 36) { + return -1; + } + + ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3], + &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9], + &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14], + &uuid[15]); + + if (ret != 16) { + return -1; + } + return 0; +} + +/* Swap from UUID format endian (BE) to the opposite or vice versa. + */ +void qemu_uuid_bswap(QemuUUID *uuid) +{ + assert(QEMU_PTR_IS_ALIGNED(uuid, sizeof(uint32_t))); + bswap32s(&uuid->fields.time_low); + bswap16s(&uuid->fields.time_mid); + bswap16s(&uuid->fields.time_high_and_version); +} diff --git a/vl.c b/vl.c index a8e70febf9..17ae9e7162 100644 --- a/vl.c +++ b/vl.c @@ -25,6 +25,7 @@ #include "qemu/cutils.h" #include "qemu/help_option.h" #include <sys/resource.h> +#include "qemu/uuid.h" #ifdef CONFIG_SECCOMP #include "sysemu/seccomp.h"
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