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GET /api/patches/2227292/?format=api
{ "id": 2227292, "url": "http://patchwork.ozlabs.org/api/patches/2227292/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ltp/patch/20260423120309.18049-4-chrubis@suse.cz/", "project": { "id": 59, "url": "http://patchwork.ozlabs.org/api/projects/59/?format=api", "name": "Linux Test Project development", "link_name": "ltp", "list_id": "ltp.lists.linux.it", "list_email": "ltp@lists.linux.it", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260423120309.18049-4-chrubis@suse.cz>", "list_archive_url": null, "date": "2026-04-23T12:03:04", "name": "[v2,3/8] syscalls: Add epoll_wait09", "commit_ref": null, "pull_url": null, "state": "needs-review-ack", "archived": false, "hash": "6a8f3ec09624d37f69cebfded8bd679cbe3d168e", "submitter": { "id": 8530, "url": "http://patchwork.ozlabs.org/api/people/8530/?format=api", "name": "Cyril Hrubis", "email": "chrubis@suse.cz" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/ltp/patch/20260423120309.18049-4-chrubis@suse.cz/mbox/", "series": [ { "id": 501188, "url": "http://patchwork.ozlabs.org/api/series/501188/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ltp/list/?series=501188", "date": "2026-04-23T12:03:01", "name": "Add more epoll tests", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/501188/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2227292/comments/", "check": "warning", "checks": "http://patchwork.ozlabs.org/api/patches/2227292/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "ltp@lists.linux.it" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "ltp@picard.linux.it" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n unprotected) header.d=suse.cz header.i=@suse.cz header.a=rsa-sha256\n header.s=susede2_rsa header.b=oBXk2cwT;\n\tdkim=fail reason=\"signature verification failed\" header.d=suse.cz\n header.i=@suse.cz header.a=ed25519-sha256 header.s=susede2_ed25519\n header.b=GMyc+060;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key)\n header.d=suse.cz header.i=@suse.cz header.a=rsa-sha256 header.s=susede2_rsa\n header.b=oBXk2cwT;\n\tdkim=neutral header.d=suse.cz header.i=@suse.cz header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=GMyc+060;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.linux.it\n (client-ip=2001:1418:10:5::2; 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BAYES_HAM(-3.00)[100.00%];\n MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000];\n R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-0.998];\n MIME_GOOD(-0.10)[text/plain];\n FUZZY_RATELIMITED(0.00)[rspamd.com];\n RCVD_VIA_SMTP_AUTH(0.00)[]; RCPT_COUNT_ONE(0.00)[1];\n ARC_NA(0.00)[];\n DKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519];\n DBL_BLOCKED_OPENRESOLVER(0.00)[ev.events:url,suse.cz:mid,suse.cz:email];\n FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[];\n MIME_TRACE(0.00)[0:+]; RCVD_COUNT_TWO(0.00)[2];\n TO_MATCH_ENVRCPT_ALL(0.00)[]; TO_DN_NONE(0.00)[];\n PREVIOUSLY_DELIVERED(0.00)[ltp@lists.linux.it];\n RCVD_TLS_ALL(0.00)[]", "X-Spam-Status": "No, score=0.1 required=7.0 tests=DKIM_SIGNED,DKIM_VALID,\n DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS shortcircuit=no\n autolearn=disabled version=4.0.1", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on in-4.smtp.seeweb.it", "X-Virus-Scanned": "clamav-milter 1.0.9 at in-4.smtp.seeweb.it", "X-Virus-Status": "Clean", "Subject": "[LTP] [PATCH v2 3/8] syscalls: Add epoll_wait09", "X-BeenThere": "ltp@lists.linux.it", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "Linux Test Project <ltp.lists.linux.it>", "List-Unsubscribe": "<https://lists.linux.it/options/ltp>,\n <mailto:ltp-request@lists.linux.it?subject=unsubscribe>", "List-Archive": "<http://lists.linux.it/pipermail/ltp/>", "List-Post": "<mailto:ltp@lists.linux.it>", "List-Help": "<mailto:ltp-request@lists.linux.it?subject=help>", "List-Subscribe": "<https://lists.linux.it/listinfo/ltp>,\n <mailto:ltp-request@lists.linux.it?subject=subscribe>", "Content-Type": "text/plain; charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Errors-To": "ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it", "Sender": "\"ltp\" <ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it>" }, "content": "Test checks that events from recursive epoll are propagated correctly.\n\nSigned-off-by: Cyril Hrubis <chrubis@suse.cz>\n---\n runtest/syscalls | 1 +\n .../kernel/syscalls/epoll_wait/.gitignore | 1 +\n .../kernel/syscalls/epoll_wait/epoll_wait09.c | 132 ++++++++++++++++++\n 3 files changed, 134 insertions(+)\n create mode 100644 testcases/kernel/syscalls/epoll_wait/epoll_wait09.c", "diff": "diff --git a/runtest/syscalls b/runtest/syscalls\nindex 99cdd1db8..569e8bbe4 100644\n--- a/runtest/syscalls\n+++ b/runtest/syscalls\n@@ -196,6 +196,7 @@ epoll_wait05 epoll_wait05\n epoll_wait06 epoll_wait06\n epoll_wait07 epoll_wait07\n epoll_wait08 epoll_wait08\n+epoll_wait09 epoll_wait09\n \n epoll_pwait01 epoll_pwait01\n epoll_pwait02 epoll_pwait02\ndiff --git a/testcases/kernel/syscalls/epoll_wait/.gitignore b/testcases/kernel/syscalls/epoll_wait/.gitignore\nindex f3b208950..f32ec535b 100644\n--- a/testcases/kernel/syscalls/epoll_wait/.gitignore\n+++ b/testcases/kernel/syscalls/epoll_wait/.gitignore\n@@ -6,3 +6,4 @@ epoll_wait05\n epoll_wait06\n epoll_wait07\n epoll_wait08\n+epoll_wait09\ndiff --git a/testcases/kernel/syscalls/epoll_wait/epoll_wait09.c b/testcases/kernel/syscalls/epoll_wait/epoll_wait09.c\nnew file mode 100644\nindex 000000000..790690884\n--- /dev/null\n+++ b/testcases/kernel/syscalls/epoll_wait/epoll_wait09.c\n@@ -0,0 +1,132 @@\n+// SPDX-License-Identifier: GPL-2.0-or-later\n+/*\n+ * Copyright (c) 2026 Cyril Hrubis <chrubis@suse.cz>\n+ */\n+\n+/*\\\n+ * Verify that epoll_wait works with nested epoll instances up to the maximum\n+ * nesting depth of 5 allowed by the kernel (EP_MAX_NESTS).\n+ *\n+ * [Algorithm]\n+ *\n+ * - Create a pipe.\n+ * - Build a chain of epoll instances of the given depth where the innermost\n+ * monitors the pipe read end and each subsequent one monitors the previous.\n+ * - Write data to the pipe.\n+ * - Call epoll_wait on the outermost epoll instance and verify it reports\n+ * EPOLLIN.\n+ * - Walk the chain inward calling epoll_wait on each level and verify that\n+ * every level reports EPOLLIN on the expected fd.\n+ * - Read the data from the pipe to drain it.\n+ */\n+\n+#include <sys/epoll.h>\n+\n+#include \"tst_epoll.h\"\n+#include \"tst_test.h\"\n+\n+#define MAX_DEPTH 5\n+\n+static int epfds[MAX_DEPTH];\n+static int fds[2] = {-1, -1};\n+\n+static struct tcase {\n+\tint depth;\n+} tcases[] = {\n+\t{2},\n+\t{3},\n+\t{4},\n+\t{5},\n+};\n+\n+static void run(unsigned int n)\n+{\n+\tstruct tcase *tc = &tcases[n];\n+\tstruct epoll_event ev;\n+\tint prev_fd, i;\n+\tchar buf;\n+\n+\tprev_fd = fds[0];\n+\n+\tfor (i = 0; i < tc->depth; i++) {\n+\t\tepfds[i] = SAFE_EPOLL_CREATE1(0);\n+\n+\t\tev.events = EPOLLIN;\n+\t\tev.data.fd = prev_fd;\n+\n+\t\tSAFE_EPOLL_CTL(epfds[i], EPOLL_CTL_ADD, prev_fd, &ev);\n+\n+\t\tprev_fd = epfds[i];\n+\t}\n+\n+\tSAFE_WRITE(SAFE_WRITE_ALL, fds[1], \"x\", 1);\n+\n+\t/* Walk from outermost to innermost verifying each level */\n+\tfor (i = tc->depth - 1; i >= 0; i--) {\n+\t\tint expected_fd = (i > 0) ? epfds[i - 1] : fds[0];\n+\n+\t\tTEST(epoll_wait(epfds[i], &ev, 1, 1000));\n+\t\tif (TST_RET != 1) {\n+\t\t\ttst_res(TFAIL | TTERRNO,\n+\t\t\t\t\"depth %d/%d: epoll_wait() returned %li, expected 1\",\n+\t\t\t\ttc->depth - i, tc->depth, TST_RET);\n+\t\t\tgoto end;\n+\t\t}\n+\n+\t\tif (ev.data.fd != expected_fd) {\n+\t\t\ttst_res(TFAIL,\n+\t\t\t\t\"depth %d/%d: data.fd %d, expected %d\",\n+\t\t\t\ttc->depth - i, tc->depth,\n+\t\t\t\tev.data.fd, expected_fd);\n+\t\t\tgoto end;\n+\t\t}\n+\n+\t\tif (!(ev.events & EPOLLIN)) {\n+\t\t\ttst_res(TFAIL,\n+\t\t\t\t\"depth %d/%d: events %x, expected EPOLLIN\",\n+\t\t\t\ttc->depth - i, tc->depth, ev.events);\n+\t\t\tgoto end;\n+\t\t}\n+\t}\n+\n+\ttst_res(TPASS, \"epoll_wait() with %d nested levels\", tc->depth);\n+\n+end:\n+\tSAFE_READ(1, fds[0], &buf, 1);\n+\n+\tfor (i = tc->depth - 1; i >= 0; i--) {\n+\t\tif (epfds[i] != -1)\n+\t\t\tSAFE_CLOSE(epfds[i]);\n+\t}\n+\n+}\n+\n+static void setup(void)\n+{\n+\tint i;\n+\n+\tfor (i = 0; i < MAX_DEPTH; i++)\n+\t\tepfds[i] = -1;\n+\n+\tSAFE_PIPE(fds);\n+}\n+\n+static void cleanup(void)\n+{\n+\tint i;\n+\n+\tfor (i = 0; i < MAX_DEPTH; i++) {\n+\t\tif (epfds[i] != -1)\n+\t\t\tSAFE_CLOSE(epfds[i]);\n+\t}\n+\n+\tSAFE_CLOSE(fds[0]);\n+\tSAFE_CLOSE(fds[1]);\n+}\n+\n+static struct tst_test test = {\n+\t.test = run,\n+\t.setup = setup,\n+\t.cleanup = cleanup,\n+\t.tcnt = ARRAY_SIZE(tcases),\n+};\n", "prefixes": [ "v2", "3/8" ] }