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From: Christian Brauner <brauner@kernel.org>
To: NeilBrown <neil@brown.name>, Oleg Nesterov <oleg@redhat.com>,
	 linux-fsdevel@vger.kernel.org
Cc: Alexander Viro <viro@zeniv.linux.org.uk>, Jan Kara <jack@suse.cz>,
	 Xin Zhao <jackzxcui1989@163.com>,
	Mateusz Guzik <mjguzik@gmail.com>,
	 Jeff Layton <jlayton@kernel.org>, Jens Axboe <axboe@kernel.dk>,
	 "Christian Brauner (Amutable)" <brauner@kernel.org>
Subject: [PATCH RFC v2 15/16] tools: sync coredump.h header
Date: Wed, 02 Sep 2026 17:58:33 +0200	[thread overview]
Message-ID: <20260902-work-coredump-unlock-self-v2-15-1bece368cbb1@kernel.org> (raw)
In-Reply-To: <20260902-work-coredump-unlock-self-v2-0-1bece368cbb1@kernel.org>

Sync the headers for the selftests.

Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
---
 tools/include/uapi/linux/coredump.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/include/uapi/linux/coredump.h b/tools/include/uapi/linux/coredump.h
index 6d0c53b534ea..ec09d7ab0131 100644
--- a/tools/include/uapi/linux/coredump.h
+++ b/tools/include/uapi/linux/coredump.h
@@ -19,6 +19,9 @@
  * @COREDUMP_MEMORY_TYPES: dump the memory types in
  *                          coredump_ack->memory_types instead of the ones
  *                          the task selected; requires COREDUMP_KERNEL
+ * @COREDUMP_CLOSE_FILES: close all file descriptors of the task before the
+ *                        coredump is generated; incompatible with
+ *                        COREDUMP_REJECT
  */
 enum {
 	COREDUMP_KERNEL		= (1ULL << 0),
@@ -28,6 +31,7 @@ enum {
 	COREDUMP_RECORDS	= (1ULL << 4),
 	COREDUMP_SPARSE		= (1ULL << 5),
 	COREDUMP_MEMORY_TYPES	= (1ULL << 6),
+	COREDUMP_CLOSE_FILES	= (1ULL << 7),
 };
 
 /**
@@ -137,6 +141,10 @@ enum {
  * Note that @memory_types must be zero if COREDUMP_MEMORY_TYPES isn't
  * raised. COREDUMP_MEMORY_TYPES requires COREDUMP_KERNEL and an ack of
  * at least COREDUMP_ACK_SIZE_VER1 bytes.
+ *
+ * If COREDUMP_CLOSE_FILES is raised in @mask the kernel closes the file
+ * descriptors of the coredumping task before it generates the coredump.
+ * The task ends up with an empty descriptor table.
  */
 struct coredump_ack {
 	__u32 size;

-- 
2.53.0


  parent reply	other threads:[~2026-09-02 15:59 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-02 15:58 [PATCH RFC v2 00/16] coredump, files: exit files on request Christian Brauner
2026-09-02 15:58 ` [PATCH RFC v2 01/16] fs: don't open-code file_close_fd() in close_fd() Christian Brauner
2026-09-02 15:58 ` [PATCH RFC v2 02/16] fs: add fput_close_list() and fput_list() Christian Brauner
2026-09-02 17:41   ` Mateusz Guzik
2026-09-02 17:58     ` Mateusz Guzik
2026-09-04  8:22       ` Christian Brauner
2026-09-02 15:58 ` [PATCH RFC v2 03/16] fs: rename do_close_on_exec() to close_cloexec_files() Christian Brauner
2026-09-02 17:41   ` Mateusz Guzik
2026-09-02 15:58 ` [PATCH RFC v2 04/16] fs: defer the final fput of close-on-exec files past the exec locks Christian Brauner
2026-09-02 17:50   ` Mateusz Guzik
2026-09-02 15:58 ` [PATCH RFC v2 05/16] fs: add switch_files_struct() Christian Brauner
2026-09-02 15:58 ` [PATCH RFC v2 06/16] fs: move unshare_fd() to fs/file.c Christian Brauner
2026-09-02 17:51   ` Mateusz Guzik
2026-09-02 15:58 ` [PATCH RFC v2 07/16] fs: remove unshare_files() Christian Brauner
2026-09-02 17:52   ` Mateusz Guzik
2026-09-02 15:58 ` [PATCH RFC v2 08/16] exec: release fdtable after exec locks drop Christian Brauner
2026-09-02 15:58 ` [PATCH RFC v2 09/16] fs: make close_files() synchronous Christian Brauner
2026-09-02 15:58 ` [PATCH RFC v2 10/16] fs: make close_range() synchronous Christian Brauner
2026-09-02 15:58 ` [PATCH RFC v2 11/16] coredump: s/startup/done/g Christian Brauner
2026-09-02 15:58 ` [PATCH RFC v2 12/16] coredump: factor out coredump_wait_inactive() Christian Brauner
2026-09-02 15:58 ` [PATCH RFC v2 13/16] fs: add alloc_files_struct() Christian Brauner
2026-09-02 15:58 ` [PATCH RFC v2 14/16] coredump: add COREDUMP_CLOSE_FILES Christian Brauner
2026-09-02 15:58 ` Christian Brauner [this message]
2026-09-02 15:58 ` [PATCH RFC v2 16/16] selftests/coredump: test COREDUMP_CLOSE_FILES Christian Brauner

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