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GET /api/patches/42348/?format=api
HTTP 200 OK
Allow: GET, PUT, PATCH, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "id": 42348,
    "url": "http://patches.dpdk.org/api/patches/42348/?format=api",
    "web_url": "http://patches.dpdk.org/project/dpdk/patch/379a32c4447eed32b982d5d04b0cc0be2cf38ce0.1530791217.git.gaetan.rivet@6wind.com/",
    "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": "<379a32c4447eed32b982d5d04b0cc0be2cf38ce0.1530791217.git.gaetan.rivet@6wind.com>",
    "list_archive_url": "https://inbox.dpdk.org/dev/379a32c4447eed32b982d5d04b0cc0be2cf38ce0.1530791217.git.gaetan.rivet@6wind.com",
    "date": "2018-07-05T11:48:20",
    "name": "[v10,13/27] eal/dev: implement device iteration",
    "commit_ref": null,
    "pull_url": null,
    "state": "superseded",
    "archived": true,
    "hash": "8717f9ec419f6b757245a545c4bd21a962f7fec7",
    "submitter": {
        "id": 269,
        "url": "http://patches.dpdk.org/api/people/269/?format=api",
        "name": "Gaëtan Rivet",
        "email": "gaetan.rivet@6wind.com"
    },
    "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/379a32c4447eed32b982d5d04b0cc0be2cf38ce0.1530791217.git.gaetan.rivet@6wind.com/mbox/",
    "series": [
        {
            "id": 419,
            "url": "http://patches.dpdk.org/api/series/419/?format=api",
            "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=419",
            "date": "2018-07-05T11:48:07",
            "name": "Device querying",
            "version": 10,
            "mbox": "http://patches.dpdk.org/series/419/mbox/"
        }
    ],
    "comments": "http://patches.dpdk.org/api/patches/42348/comments/",
    "check": "success",
    "checks": "http://patches.dpdk.org/api/patches/42348/checks/",
    "tags": {},
    "related": [],
    "headers": {
        "Return-Path": "<dev-bounces@dpdk.org>",
        "X-Original-To": "patchwork@dpdk.org",
        "Delivered-To": "patchwork@dpdk.org",
        "Received": [
            "from [92.243.14.124] (localhost [127.0.0.1])\n\tby dpdk.org (Postfix) with ESMTP id E0DF21BF51;\n\tThu,  5 Jul 2018 13:49:36 +0200 (CEST)",
            "from mail-wm0-f50.google.com (mail-wm0-f50.google.com\n\t[74.125.82.50]) by dpdk.org (Postfix) with ESMTP id 351021BEFC\n\tfor <dev@dpdk.org>; Thu,  5 Jul 2018 13:49:14 +0200 (CEST)",
            "by mail-wm0-f50.google.com with SMTP id i139-v6so10576760wmf.4\n\tfor <dev@dpdk.org>; Thu, 05 Jul 2018 04:49:14 -0700 (PDT)",
            "from bidouze.dev.6wind.com. (host.78.145.23.62.rev.coltfrance.com.\n\t[62.23.145.78]) by smtp.gmail.com with ESMTPSA id\n\to42-v6sm15809183wrc.50.2018.07.05.04.49.12\n\t(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);\n\tThu, 05 Jul 2018 04:49:12 -0700 (PDT)"
        ],
        "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=6wind-com.20150623.gappssmtp.com; s=20150623;\n\th=from:to:cc:subject:date:message-id:in-reply-to:references;\n\tbh=lW3jHlnRhfN2aBmSCSE+TxwoKO+DJP6lU7B9ktdGrlg=;\n\tb=hK/nQ82gYGma+p5mJ1kBRWQK/pzuGFdsq8eLT+xo7ffU/F0qfwbo9MqoZt+ogMpeRC\n\txUHr1oUsqKVUQMVQmzbIOtz45B0/ggpgN6wK1XHukMo1r0sDUPpqm8PlebtOH6t3lh+V\n\t32O4BRB6oWLhpxrA5+8jJL9v4k6aX1gJGaj5akRXAVzn8KLRbURHH2r5JTlkss6qto79\n\tKmbB2zf+MfAtig+hDggiOHpIvOcpLqC1vBiVRH8Rte7bULoQ9EiDkayjClGqfKlM445i\n\t0sIuBpQMG2QnWARAIeWWkCde0CXyBUCSMTuTzICSVub7GRaKMBiqlh/4Nv7y8+FNH+hb\n\tkfDg==",
        "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20161025;\n\th=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to\n\t:references;\n\tbh=lW3jHlnRhfN2aBmSCSE+TxwoKO+DJP6lU7B9ktdGrlg=;\n\tb=lqlaCygqaphkEy5FUHu3DbOxlrm9akzplVEi/xdeabMj+G0zor4hiapr9hwIirpLpD\n\tKb4IjUeZAWLzjzW1GyVWeuUp1tJDihlDqPG3f7nNl9m3booYcGSmadhUZKRs2t9LUtE9\n\tXpqAYe5So1snoiCmP2aA0YGouhJ0PyQrsbbvIZfNzwq1NjydtWYeRinOb9POT0a0o0LT\n\tr51repxCtcumIzbQlCM5EEGu4QGTH6LiaI2Z7DfgiB6PtweNdtD3pkJ4UMPVmAie8bLJ\n\tW5H511l5dEDeYu/0NSZP9b/hIj5yFwZmlAc9a2Cph7WeIEcJHdNRJ6OpcqmdMWVyvEX8\n\t1xhw==",
        "X-Gm-Message-State": "APt69E0E2MUMr4JZlHeAYK8Rrw7+96kOXlGo3YeqOPwC1Ioam4UMPGN6\n\tM6eaACWuB0OEf6OrpAydRq74qqSr",
        "X-Google-Smtp-Source": "AAOMgpewfUiwkuk64vVqW32CKCCQx7OlgtyKb4fpPnQMufzYADo3VqGGSOxGdcPY+ixjLAa2Fd+3hA==",
        "X-Received": "by 2002:a1c:9c0b:: with SMTP id\n\tf11-v6mr3881376wme.148.1530791353490; \n\tThu, 05 Jul 2018 04:49:13 -0700 (PDT)",
        "From": "Gaetan Rivet <gaetan.rivet@6wind.com>",
        "To": "dev@dpdk.org",
        "Cc": "Gaetan Rivet <gaetan.rivet@6wind.com>",
        "Date": "Thu,  5 Jul 2018 13:48:20 +0200",
        "Message-Id": "<379a32c4447eed32b982d5d04b0cc0be2cf38ce0.1530791217.git.gaetan.rivet@6wind.com>",
        "X-Mailer": "git-send-email 2.18.0",
        "In-Reply-To": "<cover.1530791217.git.gaetan.rivet@6wind.com>",
        "References": "<cover.1530791217.git.gaetan.rivet@6wind.com>",
        "Subject": "[dpdk-dev] [PATCH v10 13/27] eal/dev: implement device iteration",
        "X-BeenThere": "dev@dpdk.org",
        "X-Mailman-Version": "2.1.15",
        "Precedence": "list",
        "List-Id": "DPDK patches and discussions <dev.dpdk.org>",
        "List-Unsubscribe": "<https://mails.dpdk.org/options/dev>,\n\t<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\t<mailto:dev-request@dpdk.org?subject=subscribe>",
        "Errors-To": "dev-bounces@dpdk.org",
        "Sender": "\"dev\" <dev-bounces@dpdk.org>"
    },
    "content": "Use the iteration hooks in the abstraction layers to perform the\nrequested filtering on the internal device lists.\n\nSigned-off-by: Gaetan Rivet <gaetan.rivet@6wind.com>\n---\n lib/librte_eal/common/eal_common_dev.c  | 168 ++++++++++++++++++++++++\n lib/librte_eal/common/include/rte_dev.h |  26 ++++\n lib/librte_eal/rte_eal_version.map      |   1 +\n 3 files changed, 195 insertions(+)",
    "diff": "diff --git a/lib/librte_eal/common/eal_common_dev.c b/lib/librte_eal/common/eal_common_dev.c\nindex 5b7956d17..3d486a841 100644\n--- a/lib/librte_eal/common/eal_common_dev.c\n+++ b/lib/librte_eal/common/eal_common_dev.c\n@@ -45,6 +45,28 @@ static struct dev_event_cb_list dev_event_cbs;\n /* spinlock for device callbacks */\n static rte_spinlock_t dev_event_lock = RTE_SPINLOCK_INITIALIZER;\n \n+struct dev_next_ctx {\n+\tstruct rte_dev_iterator *it;\n+\tconst char *busstr;\n+\tconst char *clsstr;\n+};\n+\n+#define CTX(it, busstr, clsstr) \\\n+\t(&(const struct dev_next_ctx){ \\\n+\t\t.it = it, \\\n+\t\t.busstr = busstr, \\\n+\t\t.clsstr = clsstr, \\\n+\t})\n+\n+#define ITCTX(ptr) \\\n+\t(((struct dev_next_ctx *)(intptr_t)ptr)->it)\n+\n+#define BUSCTX(ptr) \\\n+\t(((struct dev_next_ctx *)(intptr_t)ptr)->busstr)\n+\n+#define CLSCTX(ptr) \\\n+\t(((struct dev_next_ctx *)(intptr_t)ptr)->clsstr)\n+\n static int cmp_detached_dev_name(const struct rte_device *dev,\n \tconst void *_name)\n {\n@@ -398,3 +420,149 @@ rte_dev_iterator_init(struct rte_dev_iterator *it,\n get_out:\n \treturn -rte_errno;\n }\n+\n+static char *\n+dev_str_sane_copy(const char *str)\n+{\n+\tsize_t end;\n+\tchar *copy;\n+\n+\tend = strcspn(str, \",/\");\n+\tif (str[end] == ',') {\n+\t\tcopy = strdup(&str[end + 1]);\n+\t} else {\n+\t\t/* '/' or '\\0' */\n+\t\tcopy = strdup(\"\");\n+\t}\n+\tif (copy == NULL) {\n+\t\trte_errno = ENOMEM;\n+\t} else {\n+\t\tchar *slash;\n+\n+\t\tslash = strchr(copy, '/');\n+\t\tif (slash != NULL)\n+\t\t\tslash[0] = '\\0';\n+\t}\n+\treturn copy;\n+}\n+\n+static int\n+class_next_dev_cmp(const struct rte_class *cls,\n+\t\t   const void *ctx)\n+{\n+\tstruct rte_dev_iterator *it;\n+\tconst char *clsstr = NULL;\n+\tvoid *dev;\n+\n+\tif (cls->dev_iterate == NULL)\n+\t\treturn 1;\n+\tit = ITCTX(ctx);\n+\tclsstr = CLSCTX(ctx);\n+\tdev = it->class_device;\n+\t/* it->clsstr != NULL means a class\n+\t * was specified in the devstr.\n+\t */\n+\tif (it->clsstr != NULL && cls != it->cls)\n+\t\treturn 1;\n+\t/* If an error occurred previously,\n+\t * no need to test further.\n+\t */\n+\tif (rte_errno != 0)\n+\t\treturn -1;\n+\tdev = cls->dev_iterate(dev, clsstr, it);\n+\tit->class_device = dev;\n+\treturn dev == NULL;\n+}\n+\n+static int\n+bus_next_dev_cmp(const struct rte_bus *bus,\n+\t\t const void *ctx)\n+{\n+\tstruct rte_device *dev = NULL;\n+\tstruct rte_class *cls = NULL;\n+\tstruct rte_dev_iterator *it;\n+\tconst char *busstr = NULL;\n+\n+\tif (bus->dev_iterate == NULL)\n+\t\treturn 1;\n+\tit = ITCTX(ctx);\n+\tbusstr = BUSCTX(ctx);\n+\tdev = it->device;\n+\t/* it->busstr != NULL means a bus\n+\t * was specified in the devstr.\n+\t */\n+\tif (it->busstr != NULL && bus != it->bus)\n+\t\treturn 1;\n+\t/* If an error occurred previously,\n+\t * no need to test further.\n+\t */\n+\tif (rte_errno != 0)\n+\t\treturn -1;\n+\tif (it->clsstr == NULL) {\n+\t\tdev = bus->dev_iterate(dev, busstr, it);\n+\t\tgoto end;\n+\t}\n+\t/* clsstr != NULL */\n+\tif (dev == NULL) {\n+next_dev_on_bus:\n+\t\tdev = bus->dev_iterate(dev, busstr, it);\n+\t\tit->device = dev;\n+\t}\n+\tif (dev == NULL)\n+\t\treturn 1;\n+\tif (it->cls != NULL)\n+\t\tcls = TAILQ_PREV(it->cls, rte_class_list, next);\n+\tcls = rte_class_find(cls, class_next_dev_cmp, ctx);\n+\tif (cls != NULL) {\n+\t\tit->cls = cls;\n+\t\tgoto end;\n+\t}\n+\tgoto next_dev_on_bus;\n+end:\n+\tit->device = dev;\n+\treturn dev == NULL;\n+}\n+__rte_experimental\n+struct rte_device *\n+rte_dev_iterator_next(struct rte_dev_iterator *it)\n+{\n+\tstruct rte_bus *bus = NULL;\n+\tint old_errno = rte_errno;\n+\tchar *busstr = NULL;\n+\tchar *clsstr = NULL;\n+\n+\trte_errno = 0;\n+\tif (it->busstr == NULL && it->clsstr == NULL) {\n+\t\t/* Invalid iterator. */\n+\t\trte_errno = EINVAL;\n+\t\treturn NULL;\n+\t}\n+\tif (it->bus != NULL)\n+\t\tbus = TAILQ_PREV(it->bus, rte_bus_list, next);\n+\tif (it->busstr != NULL) {\n+\t\tbusstr = dev_str_sane_copy(it->busstr);\n+\t\tif (busstr == NULL)\n+\t\t\tgoto out;\n+\t}\n+\tif (it->clsstr != NULL) {\n+\t\tclsstr = dev_str_sane_copy(it->clsstr);\n+\t\tif (clsstr == NULL)\n+\t\t\tgoto out;\n+\t}\n+\twhile ((bus = rte_bus_find(bus, bus_next_dev_cmp,\n+\t\t\t\t   CTX(it, busstr, clsstr)))) {\n+\t\tif (it->device != NULL) {\n+\t\t\tit->bus = bus;\n+\t\t\tgoto out;\n+\t\t}\n+\t\tif (it->busstr != NULL ||\n+\t\t    rte_errno != 0)\n+\t\t\tbreak;\n+\t}\n+\tif (rte_errno == 0)\n+\t\trte_errno = old_errno;\n+out:\n+\tfree(busstr);\n+\tfree(clsstr);\n+\treturn it->device;\n+}\ndiff --git a/lib/librte_eal/common/include/rte_dev.h b/lib/librte_eal/common/include/rte_dev.h\nindex 7b7bd83bc..1553c0970 100644\n--- a/lib/librte_eal/common/include/rte_dev.h\n+++ b/lib/librte_eal/common/include/rte_dev.h\n@@ -356,6 +356,32 @@ __rte_experimental\n int\n rte_dev_iterator_init(struct rte_dev_iterator *it, const char *str);\n \n+/**\n+ * Iterates on a device iterator.\n+ *\n+ * Generates a new rte_device handle corresponding to the next element\n+ * in the list described in comprehension by the iterator.\n+ *\n+ * The next object is returned, and the iterator is updated.\n+ *\n+ * @param it\n+ *   Device iterator handle.\n+ *\n+ * @return\n+ *   An rte_device handle if found.\n+ *   NULL if an error occurred (rte_errno is set).\n+ *   NULL if no device could be found (rte_errno is not set).\n+ */\n+__rte_experimental\n+struct rte_device *\n+rte_dev_iterator_next(struct rte_dev_iterator *it);\n+\n+#define RTE_DEV_FOREACH(dev, devstr, it) \\\n+\tfor (rte_dev_iterator_init(it, devstr), \\\n+\t     dev = rte_dev_iterator_next(it); \\\n+\t     dev != NULL; \\\n+\t     dev = rte_dev_iterator_next(it))\n+\n #ifdef __cplusplus\n }\n #endif\ndiff --git a/lib/librte_eal/rte_eal_version.map b/lib/librte_eal/rte_eal_version.map\nindex ac04120d6..4cd5ab3df 100644\n--- a/lib/librte_eal/rte_eal_version.map\n+++ b/lib/librte_eal/rte_eal_version.map\n@@ -252,6 +252,7 @@ EXPERIMENTAL {\n \trte_dev_event_monitor_start;\n \trte_dev_event_monitor_stop;\n \trte_dev_iterator_init;\n+\trte_dev_iterator_next;\n \trte_devargs_add;\n \trte_devargs_dump;\n \trte_devargs_insert;\n",
    "prefixes": [
        "v10",
        "13/27"
    ]
}