From 0dd73648532e8654e07c28bba6c80bfb779a4938 Mon Sep 17 00:00:00 2001 From: Brian Behlendorf Date: Thu, 6 Feb 2020 10:30:41 -0800 Subject: Linux 5.6 compat: struct proc_ops The proc_ops structure was introduced to replace the use of of the file_operations structure when registering proc handlers. This change creates a new kstat_proc_op_t typedef for compatibility which can be used to pass around the correct structure. This change additionally adds the 'const' keyword to all of the existing proc operations structures. Reviewed-by: Tony Hutter Signed-off-by: Brian Behlendorf Closes #9961 --- config/kernel-proc-operations.m4 | 41 ++++++++++++++++++++++++++++++++++++++++ config/kernel.m4 | 2 ++ 2 files changed, 43 insertions(+) create mode 100644 config/kernel-proc-operations.m4 (limited to 'config') diff --git a/config/kernel-proc-operations.m4 b/config/kernel-proc-operations.m4 new file mode 100644 index 000000000..df216222e --- /dev/null +++ b/config/kernel-proc-operations.m4 @@ -0,0 +1,41 @@ +dnl # +dnl # 5.6 API Change +dnl # The proc_ops structure was introduced to replace the use of +dnl # of the file_operations structure when registering proc handlers. +dnl # +AC_DEFUN([ZFS_AC_KERNEL_SRC_PROC_OPERATIONS], [ + ZFS_LINUX_TEST_SRC([proc_ops_struct], [ + #include + + int test_open(struct inode *ip, struct file *fp) { return 0; } + ssize_t test_read(struct file *fp, char __user *ptr, + size_t size, loff_t *offp) { return 0; } + ssize_t test_write(struct file *fp, const char __user *ptr, + size_t size, loff_t *offp) { return 0; } + loff_t test_lseek(struct file *fp, loff_t off, int flag) + { return 0; } + int test_release(struct inode *ip, struct file *fp) + { return 0; } + + const struct proc_ops test_ops __attribute__ ((unused)) = { + .proc_open = test_open, + .proc_read = test_read, + .proc_write = test_write, + .proc_lseek = test_lseek, + .proc_release = test_release, + }; + ], [ + struct proc_dir_entry *entry __attribute__ ((unused)) = + proc_create_data("test", 0444, NULL, &test_ops, NULL); + ]) +]) + +AC_DEFUN([ZFS_AC_KERNEL_PROC_OPERATIONS], [ + AC_MSG_CHECKING([whether proc_ops structure exists]) + ZFS_LINUX_TEST_RESULT([proc_ops_struct], [ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_PROC_OPS_STRUCT, 1, [proc_ops structure exists]) + ], [ + AC_MSG_RESULT(no) + ]) +]) diff --git a/config/kernel.m4 b/config/kernel.m4 index ec8f6a5c1..23643e0c3 100644 --- a/config/kernel.m4 +++ b/config/kernel.m4 @@ -52,6 +52,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [ ZFS_AC_KERNEL_SRC_RW ZFS_AC_KERNEL_SRC_TIMER_SETUP ZFS_AC_KERNEL_SRC_SUPER_USER_NS + ZFS_AC_KERNEL_SRC_PROC_OPERATIONS ZFS_AC_KERNEL_SRC_BLOCK_DEVICE_OPERATIONS ZFS_AC_KERNEL_SRC_BIO ZFS_AC_KERNEL_SRC_BLKDEV @@ -145,6 +146,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [ ZFS_AC_KERNEL_RW ZFS_AC_KERNEL_TIMER_SETUP ZFS_AC_KERNEL_SUPER_USER_NS + ZFS_AC_KERNEL_PROC_OPERATIONS ZFS_AC_KERNEL_BLOCK_DEVICE_OPERATIONS ZFS_AC_KERNEL_BIO ZFS_AC_KERNEL_BLKDEV -- cgit v1.2.3