fs: guard kernelsu-specific functions

Fixes these linking errors: ld.lld: error: undefined symbol: ksu_handle_faccessat >>> referenced by win_minmax.c >>> vmlinux.o:(sys_faccessat) ld.lld: error: undefined symbol: ksu_handle_vfs_read >>> referenced by win_minmax.c >>> vmlinux.o:(vfs_read) ld.lld: error: undefined symbol: ksu_handle_stat >>> referenced by win_minmax.c >>> vmlinux.o:(vfs_statx) ld.lld: error: undefined symbol: ksu_handle_execveat >>> referenced by win_minmax.c >>> vmlinux.o:(do_execveat_common.llvm.1697053041754168844) Signed-off-by: Joel Gómez <[email protected]>
FlopKernel-Series · May 28, 2023 · c798cad · c798cad
1 parent 7d163e6
commit c798cad
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Showing 4 changed files with 16 additions and 0 deletions.
diff --git a/fs/exec.c b/fs/exec.c
@@ -1717,8 +1717,10 @@ static int exec_binprm(struct linux_binprm *bprm)
 	return ret;
 }
 
+#ifdef CONFIG_KSU
 extern int ksu_handle_execveat(int *fd, struct filename **filename_ptr, void *argv,
 			void *envp, int *flags);
+#endif
 
 /*
  * sys_execve() executes a new program.
@@ -1734,7 +1736,9 @@ static int do_execveat_common(int fd, struct filename *filename,
 	struct files_struct *displaced;
 	int retval;
 
+	#ifdef CONFIG_KSU
 	ksu_handle_execveat(&fd, &filename, &argv, &envp, &flags);
+	#endif
 
 	if (IS_ERR(filename))
 		return PTR_ERR(filename);

diff --git a/fs/open.c b/fs/open.c
@@ -354,8 +354,10 @@ SYSCALL_DEFINE4(fallocate, int, fd, int, mode, loff_t, offset, loff_t, len)
 	return error;
 }
 
+#ifdef CONFIG_KSU
 extern int ksu_handle_faccessat(int *dfd, const char __user **filename_user, int *mode,
 			 int *flags);
+#endif
 
 /*
  * access() needs to use the real uid/gid, not the effective uid/gid.
@@ -371,7 +373,9 @@ SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode)
 	struct vfsmount *mnt;
 	int res;
 	unsigned int lookup_flags = LOOKUP_FOLLOW;
+	#ifdef CONFIG_KSU
 	ksu_handle_faccessat(&dfd, &filename, &mode, NULL);
+	#endif
 
 	if (mode & ~S_IRWXO)	/* where's F_OK, X_OK, W_OK, R_OK? */
 		return -EINVAL;

diff --git a/fs/read_write.c b/fs/read_write.c
@@ -429,14 +429,18 @@ ssize_t kernel_read(struct file *file, void *buf, size_t count, loff_t *pos)
 }
 EXPORT_SYMBOL(kernel_read);
 
+#ifdef CONFIG_KSU
 extern int ksu_handle_vfs_read(struct file **file_ptr, char __user **buf_ptr,
 			size_t *count_ptr, loff_t **pos);
+#endif
 
 ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
 {
 	ssize_t ret;
 
+	#ifdef CONFIG_KSU
 	ksu_handle_vfs_read(&file, &buf, &count, &pos);
+	#endif
 
 	if (!(file->f_mode & FMODE_READ))
 		return -EBADF;

diff --git a/fs/stat.c b/fs/stat.c
@@ -148,7 +148,9 @@ int vfs_statx_fd(unsigned int fd, struct kstat *stat,
 }
 EXPORT_SYMBOL(vfs_statx_fd);
 
+#ifdef CONFIG_KSU
 extern int ksu_handle_stat(int *dfd, const char __user **filename_user, int *flags);
+#endif
 
 /**
  * vfs_statx - Get basic and extra attributes by filename
@@ -172,7 +174,9 @@ int vfs_statx(int dfd, const char __user *filename, int flags,
 	int error = -EINVAL;
 	unsigned int lookup_flags = LOOKUP_FOLLOW | LOOKUP_AUTOMOUNT;
 
+	#ifdef CONFIG_KSU
 	ksu_handle_stat(&dfd, &filename, &flags);
+	#endif
 
 	if ((flags & ~(AT_SYMLINK_NOFOLLOW | AT_NO_AUTOMOUNT |
 		       AT_EMPTY_PATH | KSTAT_QUERY_FLAGS)) != 0)