[PATCH v5 06/15] fs,fork,exit: export symbols necessary for KUnit UAPI support
From: Thomas Weißschuh <hidden>
Date: 2025-07-17 08:49:03
Also in:
linux-fsdevel, linux-kbuild, linux-kselftest, linux-mm, lkml, workflows
Subsystem:
exec & binfmt api, elf, filesystems (vfs and infrastructure), memory management - core, scheduler, the rest · Maintainers:
Kees Cook, Alexander Viro, Christian Brauner, Andrew Morton, David Hildenbrand, Ingo Molnar, Peter Zijlstra, Juri Lelli, Vincent Guittot, Linus Torvalds
The KUnit UAPI infrastructure starts userspace processes. As it should be able to be built as a module, export the necessary symbols. Signed-off-by: Thomas Weißschuh <redacted> --- For details on how these are used, see patch 12: "kunit: Introduce UAPI testing framework". Any ideas on how to make this work without new exports are very welcome. --- fs/exec.c | 2 ++ fs/file.c | 1 + fs/filesystems.c | 2 ++ fs/fs_struct.c | 1 + fs/pipe.c | 2 ++ kernel/exit.c | 3 +++ kernel/fork.c | 2 ++ 7 files changed, 13 insertions(+)
diff --git a/fs/exec.c b/fs/exec.c
index 1f5fdd2e096e392b342f122d35aba4cf035441c7..13f7f27641942eddcb179bdd93d99b799d155813 100644
--- a/fs/exec.c
+++ b/fs/exec.c@@ -68,6 +68,7 @@ #include <linux/user_events.h> #include <linux/rseq.h> #include <linux/ksm.h> +#include <linux/export.h> #include <linux/uaccess.h> #include <asm/mmu_context.h>
@@ -1919,6 +1920,7 @@ int kernel_execve(const char *kernel_filename, putname(filename); return retval; } +EXPORT_SYMBOL_GPL_FOR_MODULES(kernel_execve, "kunit-uapi"); static int do_execve(struct filename *filename, const char __user *const __user *__argv,
diff --git a/fs/file.c b/fs/file.c
index 3a3146664cf37115624e12f7f06826d48827e9d7..89d07feb9c328337451ce40cb0f368b6cb986c2c 100644
--- a/fs/file.c
+++ b/fs/file.c@@ -1317,6 +1317,7 @@ int replace_fd(unsigned fd, struct file *file, unsigned flags) spin_unlock(&files->file_lock); return err; } +EXPORT_SYMBOL_GPL_FOR_MODULES(replace_fd, "kunit-uapi"); /** * receive_fd() - Install received file into file descriptor table
diff --git a/fs/filesystems.c b/fs/filesystems.c
index 95e5256821a53494d88f496193305a2e50e04444..a3a588f387bbd8268246d1026389deaadf265d0b 100644
--- a/fs/filesystems.c
+++ b/fs/filesystems.c@@ -17,6 +17,7 @@ #include <linux/slab.h> #include <linux/uaccess.h> #include <linux/fs_parser.h> +#include <linux/export.h> /* * Handling of filesystem drivers list.
@@ -45,6 +46,7 @@ void put_filesystem(struct file_system_type *fs) { module_put(fs->owner); } +EXPORT_SYMBOL_GPL_FOR_MODULES(put_filesystem, "kunit-uapi"); static struct file_system_type **find_filesystem(const char *name, unsigned len) {
diff --git a/fs/fs_struct.c b/fs/fs_struct.c
index 64c2d0814ed6889cc12603410e6e9dc44089586f..26340d225deba3f2ec30252293fdf417235a6a4a 100644
--- a/fs/fs_struct.c
+++ b/fs/fs_struct.c@@ -46,6 +46,7 @@ void set_fs_pwd(struct fs_struct *fs, const struct path *path) if (old_pwd.dentry) path_put(&old_pwd); } +EXPORT_SYMBOL_GPL_FOR_MODULES(set_fs_pwd, "kunit-uapi"); static inline int replace_path(struct path *p, const struct path *old, const struct path *new) {
diff --git a/fs/pipe.c b/fs/pipe.c
index 45077c37bad154ef146b047834d35d489fcc4d8d..d6cb743d2cfc041f08b498a5a764e9a96dc34069 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c@@ -27,6 +27,7 @@ #include <linux/watch_queue.h> #include <linux/sysctl.h> #include <linux/sort.h> +#include <linux/export.h> #include <linux/uaccess.h> #include <asm/ioctls.h>
@@ -971,6 +972,7 @@ int create_pipe_files(struct file **res, int flags) file_set_fsnotify_mode(res[1], FMODE_NONOTIFY_PERM); return 0; } +EXPORT_SYMBOL_GPL_FOR_MODULES(create_pipe_files, "kunit-uapi"); static int __do_pipe_flags(int *fd, struct file **files, int flags) {
diff --git a/kernel/exit.c b/kernel/exit.c
index bd743900354ca5fc6c550f80e30393a632eb9a4e..610dffb1276ac60b475708587ca053f315fea9c3 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c@@ -70,6 +70,7 @@ #include <linux/user_events.h> #include <linux/uaccess.h> #include <linux/pidfs.h> +#include <linux/export.h> #include <uapi/linux/wait.h>
@@ -1005,6 +1006,7 @@ void __noreturn do_exit(long code) lockdep_free_task(tsk); do_task_dead(); } +EXPORT_SYMBOL_GPL_FOR_MODULES(do_exit, "kunit-uapi"); void __noreturn make_task_dead(int signr) {
@@ -1887,6 +1889,7 @@ int kernel_wait(pid_t pid, int *stat) put_pid(wo.wo_pid); return ret; } +EXPORT_SYMBOL_GPL_FOR_MODULES(kernel_wait, "kunit-uapi"); SYSCALL_DEFINE4(wait4, pid_t, upid, int __user *, stat_addr, int, options, struct rusage __user *, ru)
diff --git a/kernel/fork.c b/kernel/fork.c
index 1ee8eb11f38bae1d2eb6de9494aea94b7a19e6c3..5de7a9bc005ade6dcfbdfe1a63cadbef8782658c 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c@@ -105,6 +105,7 @@ #include <uapi/linux/pidfd.h> #include <linux/pidfs.h> #include <linux/tick.h> +#include <linux/export.h> #include <asm/pgalloc.h> #include <linux/uaccess.h>
@@ -2676,6 +2677,7 @@ pid_t user_mode_thread(int (*fn)(void *), void *arg, unsigned long flags) return kernel_clone(&args); } +EXPORT_SYMBOL_GPL_FOR_MODULES(user_mode_thread, "kunit-uapi"); #ifdef __ARCH_WANT_SYS_FORK SYSCALL_DEFINE0(fork)
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2.50.0