[PATCH v6 6/9] coredump: show supported coredump modes
From: Christian Brauner <brauner@kernel.org>
Date: 2025-05-12 08:56:12
Also in:
linux-fsdevel, linux-security-module, lkml
Subsystem:
filesystems (vfs and infrastructure), the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
Allow userspace to discover what coredump modes are supported. Signed-off-by: Christian Brauner <brauner@kernel.org> --- fs/coredump.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/fs/coredump.c b/fs/coredump.c
index 5ea0c93dd5ac..deee52bff6bc 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c@@ -1254,6 +1254,12 @@ static int proc_dostring_coredump(const struct ctl_table *table, int write, static const unsigned int core_file_note_size_min = CORE_FILE_NOTE_SIZE_DEFAULT; static const unsigned int core_file_note_size_max = CORE_FILE_NOTE_SIZE_MAX; +static char core_modes[] = { + "file\npipe" +#ifdef CONFIG_UNIX + "\nsocket" +#endif +}; static const struct ctl_table coredump_sysctls[] = { {
@@ -1297,6 +1303,13 @@ static const struct ctl_table coredump_sysctls[] = { .extra1 = SYSCTL_ZERO, .extra2 = SYSCTL_ONE, }, + { + .procname = "core_modes", + .data = core_modes, + .maxlen = sizeof(core_modes) - 1, + .mode = 0444, + .proc_handler = proc_dostring, + }, }; static int __init init_fs_coredump_sysctls(void)
--
2.47.2