Allow userspace to discover what coredump modes are supported.
Signed-off-by: Christian Brauner <brauner@xxxxxxxxxx>
---
fs/coredump.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/fs/coredump.c b/fs/coredump.c
index 9a6cba233db9..1c7428c23878 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -1217,6 +1217,13 @@ 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[] = {
+#ifdef CONFIG_UNIX
+ "file\npipe\nunix"
+#else
+ "file\npipe"
+#endif
+};
static const struct ctl_table coredump_sysctls[] = {
{
@@ -1260,6 +1267,13 @@ 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
