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GET /api/patches/139084/?format=api
{ "id": 139084, "url": "http://patches.dpdk.org/api/patches/139084/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/patch/20240403163432.437275-2-stephen@networkplumber.org/", "project": { "id": 1, "url": "http://patches.dpdk.org/api/projects/1/?format=api", "name": "DPDK", "link_name": "dpdk", "list_id": "dev.dpdk.org", "list_email": "dev@dpdk.org", "web_url": "http://core.dpdk.org", "scm_url": "git://dpdk.org/dpdk", "webscm_url": "http://git.dpdk.org/dpdk", "list_archive_url": "https://inbox.dpdk.org/dev", "list_archive_url_format": "https://inbox.dpdk.org/dev/{}", "commit_url_format": "" }, "msgid": "<20240403163432.437275-2-stephen@networkplumber.org>", "list_archive_url": "https://inbox.dpdk.org/dev/20240403163432.437275-2-stephen@networkplumber.org", "date": "2024-04-03T16:32:29", "name": "[1/2] eal: add functions to generate uuid values", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "dcb6482fffef4a5db512f0077072d214be8afcee", "submitter": { "id": 27, "url": "http://patches.dpdk.org/api/people/27/?format=api", "name": "Stephen Hemminger", "email": "stephen@networkplumber.org" }, "delegate": { "id": 1, "url": "http://patches.dpdk.org/api/users/1/?format=api", "username": "tmonjalo", "first_name": "Thomas", "last_name": "Monjalon", "email": "thomas@monjalon.net" }, "mbox": "http://patches.dpdk.org/project/dpdk/patch/20240403163432.437275-2-stephen@networkplumber.org/mbox/", "series": [ { "id": 31671, "url": "http://patches.dpdk.org/api/series/31671/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=31671", "date": "2024-04-03T16:32:28", "name": "uuid: enhancements and tests", "version": 1, "mbox": "http://patches.dpdk.org/series/31671/mbox/" } ], "comments": "http://patches.dpdk.org/api/patches/139084/comments/", "check": "success", "checks": "http://patches.dpdk.org/api/patches/139084/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@inbox.dpdk.org", "Delivered-To": "patchwork@inbox.dpdk.org", "Received": [ "from mails.dpdk.org (mails.dpdk.org [217.70.189.124])\n\tby inbox.dpdk.org (Postfix) with ESMTP id 7A79843DEE;\n\tWed, 3 Apr 2024 18:34:51 +0200 (CEST)", "from mails.dpdk.org (localhost [127.0.0.1])\n\tby mails.dpdk.org (Postfix) with ESMTP id D609F402E4;\n\tWed, 3 Apr 2024 18:34:46 +0200 (CEST)", "from mail-pf1-f178.google.com (mail-pf1-f178.google.com\n [209.85.210.178])\n by mails.dpdk.org (Postfix) with ESMTP id A1B9C40144\n for <dev@dpdk.org>; Wed, 3 Apr 2024 18:34:44 +0200 (CEST)", "by mail-pf1-f178.google.com with SMTP id\n d2e1a72fcca58-6ecbe6dc8c6so2415970b3a.1\n for <dev@dpdk.org>; Wed, 03 Apr 2024 09:34:44 -0700 (PDT)", "from hermes.local (204-195-96-226.wavecable.com. 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2002:a05:6a21:398b:b0:1a7:34c:185d with SMTP id\n ad11-20020a056a21398b00b001a7034c185dmr170902pzc.59.1712162083837;\n Wed, 03 Apr 2024 09:34:43 -0700 (PDT)", "From": "Stephen Hemminger <stephen@networkplumber.org>", "To": "dev@dpdk.org", "Cc": "Stephen Hemminger <stephen@networkplumber.org>", "Subject": "[PATCH 1/2] eal: add functions to generate uuid values", "Date": "Wed, 3 Apr 2024 09:32:29 -0700", "Message-ID": "<20240403163432.437275-2-stephen@networkplumber.org>", "X-Mailer": "git-send-email 2.43.0", "In-Reply-To": "<20240403163432.437275-1-stephen@networkplumber.org>", "References": "<20240403163432.437275-1-stephen@networkplumber.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "DPDK patches and discussions <dev.dpdk.org>", "List-Unsubscribe": "<https://mails.dpdk.org/options/dev>,\n <mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://mails.dpdk.org/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<https://mails.dpdk.org/listinfo/dev>,\n <mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org" }, "content": "Useful to be able to generate uuid values for tests or\nfor interaction with other subsystems as magic cookie.\nNaming and overall algorithm come from libuuid which is used\nby permission of original author.\n\nSigned-off-by: Stephen Hemminger <stephen@networkplumber.org>\n---\n lib/eal/common/eal_common_uuid.c | 56 ++++++++++++++++++++++++++++++++\n lib/eal/include/rte_uuid.h | 22 ++++++++++++-\n lib/eal/version.map | 2 ++\n 3 files changed, 79 insertions(+), 1 deletion(-)", "diff": "diff --git a/lib/eal/common/eal_common_uuid.c b/lib/eal/common/eal_common_uuid.c\nindex 0a80bfbb38..fc8f58e8a4 100644\n--- a/lib/eal/common/eal_common_uuid.c\n+++ b/lib/eal/common/eal_common_uuid.c\n@@ -7,7 +7,12 @@\n #include <stdint.h>\n #include <stdlib.h>\n #include <ctype.h>\n+#include <time.h>\n \n+#include <rte_atomic.h>\n+#include <rte_common.h>\n+#include <rte_random.h>\n+#include <rte_time.h>\n #include <rte_uuid.h>\n \n /* UUID packed form */\n@@ -165,3 +170,54 @@ void rte_uuid_unparse(const rte_uuid_t uu, char *out, size_t len)\n \t\tuuid.node[0], uuid.node[1], uuid.node[2],\n \t\tuuid.node[3], uuid.node[4], uuid.node[5]);\n }\n+\n+void rte_uuid_generate_random(rte_uuid_t out)\n+{\n+\tunion {\n+\t\tuint64_t words[2];\n+\t\trte_uuid_t uuid;\n+\t} buf;\n+\tstruct uuid uu;\n+\n+\t/* UUID is 128 bit */\n+\tbuf.words[0] = rte_rand();\n+\tbuf.words[1] = rte_rand();\n+\n+\t/* Mark these random bytes a version 4 random uuid */\n+\tuuid_unpack(buf.uuid, &uu);\n+\tuu.clock_seq = (uu.clock_seq & 0x3FFF) | 0x8000;\n+\tuu.time_hi_and_version = (uu.time_hi_and_version & 0x0FFF) | 0x4000;\n+\tuuid_pack(&uu, out);\n+}\n+\n+void rte_uuid_generate_time(rte_uuid_t out)\n+{\n+\tstruct uuid uu;\n+\tstruct timespec ts;\n+\tuint64_t ns, rnd;\n+\tstatic uint16_t sequence;\n+\n+\t/* The time value for UUID is 100ns since 15 October 1582 */\n+\tclock_gettime(CLOCK_REALTIME, &ts);\n+\n+\tns = ts.tv_nsec / 100;\n+\tns += (uint64_t) ts.tv_sec * (NSEC_PER_SEC / 100);\n+\tns += (((uint64_t) 0x01B21DD2) << 32) + 0x13814000;\n+\n+\tuu.time_low = (uint32_t) ns;\n+\tuu.time_mid = (uint16_t) (ns >> 32);\n+\tuu.time_hi_and_version = (uint16_t) (ns >> 48);\n+\tuu.time_hi_and_version = (uu.time_hi_and_version & 0x0FFF) | 0x4000;\n+\tuu.clock_seq = rte_atomic_fetch_add_explicit(&sequence, 1,\n+\t\t\t\t\t\t rte_memory_order_relaxed);\n+\n+\trnd = rte_rand();\n+\tmemcpy(uu.node, &rnd, 6);\n+\t/*\n+\t * What libuuid does set multicast bit.\n+\t * This avoids conflicts with network cards.\n+\t */\n+\tuu.node[0] |= 0x1;\n+\n+\tuuid_pack(&uu, out);\n+}\ndiff --git a/lib/eal/include/rte_uuid.h b/lib/eal/include/rte_uuid.h\nindex cfefd4308a..052b78a812 100644\n--- a/lib/eal/include/rte_uuid.h\n+++ b/lib/eal/include/rte_uuid.h\n@@ -18,6 +18,8 @@ extern \"C\" {\n #include <stddef.h>\n #include <string.h>\n \n+#include <rte_compat.h>\n+\n /**\n * Struct describing a Universal Unique Identifier\n */\n@@ -94,12 +96,30 @@ int\trte_uuid_parse(const char *in, rte_uuid_t uu);\n * @param uu\n * UUID to format\n * @param out\n- * Resulting string buffer\n+ * Resulting string bufferm\n * @param len\n * Sizeof the available string buffer\n */\n void\trte_uuid_unparse(const rte_uuid_t uu, char *out, size_t len);\n \n+/**\n+ * Generate a random uuid\n+ *\n+ * @param uu\n+ * Resulting UUID\n+ */\n+__rte_experimental\n+void rte_uuid_generate_random(rte_uuid_t uu);\n+\n+/**\n+ * Generate a uuid based on time stamp.\n+ *\n+ * @param uu\n+ * Resulting UUID\n+ */\n+__rte_experimental\n+void rte_uuid_generate_time(rte_uuid_t uu);\n+\n #ifdef __cplusplus\n }\n #endif\ndiff --git a/lib/eal/version.map b/lib/eal/version.map\nindex 3df50c3fbb..5a8aa67244 100644\n--- a/lib/eal/version.map\n+++ b/lib/eal/version.map\n@@ -396,6 +396,8 @@ EXPERIMENTAL {\n \n \t# added in 24.03\n \trte_vfio_get_device_info; # WINDOWS_NO_EXPORT\n+\trte_uuid_generate_random;\n+\trte_uuid_generate_time;\n };\n \n INTERNAL {\n", "prefixes": [ "1/2" ] }