1AC_DEFUN([ZFS_AC_KERNEL_SRC_VFS_ITERATE], [ 2 ZFS_LINUX_TEST_SRC([file_operations_iterate_shared], [ 3 #include <linux/fs.h> 4 static int iterate(struct file *filp, struct dir_context * context) 5 { return 0; } 6 7 static const struct file_operations fops 8 __attribute__ ((unused)) = { 9 .iterate_shared = iterate, 10 }; 11 ],[]) 12 13 ZFS_LINUX_TEST_SRC([file_operations_iterate], [ 14 #include <linux/fs.h> 15 static int iterate(struct file *filp, 16 struct dir_context *context) { return 0; } 17 18 static const struct file_operations fops 19 __attribute__ ((unused)) = { 20 .iterate = iterate, 21 }; 22 23 #if defined(FMODE_KABI_ITERATE) 24 #error "RHEL 7.5, FMODE_KABI_ITERATE interface" 25 #endif 26 ],[]) 27 28 ZFS_LINUX_TEST_SRC([file_operations_readdir], [ 29 #include <linux/fs.h> 30 static int readdir(struct file *filp, void *entry, 31 filldir_t func) { return 0; } 32 33 static const struct file_operations fops 34 __attribute__ ((unused)) = { 35 .readdir = readdir, 36 }; 37 ],[]) 38]) 39 40AC_DEFUN([ZFS_AC_KERNEL_VFS_ITERATE], [ 41 dnl # 42 dnl # 4.7 API change 43 dnl # 44 AC_MSG_CHECKING([whether fops->iterate_shared() is available]) 45 ZFS_LINUX_TEST_RESULT([file_operations_iterate_shared], [ 46 AC_MSG_RESULT(yes) 47 AC_DEFINE(HAVE_VFS_ITERATE_SHARED, 1, 48 [fops->iterate_shared() is available]) 49 ],[ 50 AC_MSG_RESULT(no) 51 52 dnl # 53 dnl # 3.11 API change 54 dnl # 55 dnl # RHEL 7.5 compatibility; the fops.iterate() method was 56 dnl # added to the file_operations structure but in order to 57 dnl # maintain KABI compatibility all callers must set 58 dnl # FMODE_KABI_ITERATE which is checked in iterate_dir(). 59 dnl # When detected ignore this interface and fallback to 60 dnl # to using fops.readdir() to retain KABI compatibility. 61 dnl # 62 AC_MSG_CHECKING([whether fops->iterate() is available]) 63 ZFS_LINUX_TEST_RESULT([file_operations_iterate], [ 64 AC_MSG_RESULT(yes) 65 AC_DEFINE(HAVE_VFS_ITERATE, 1, 66 [fops->iterate() is available]) 67 ],[ 68 AC_MSG_RESULT(no) 69 70 dnl # 71 dnl # readdir interface introduced 72 dnl # 73 AC_MSG_CHECKING([whether fops->readdir() is available]) 74 ZFS_LINUX_TEST_RESULT([file_operations_readdir], [ 75 AC_MSG_RESULT(yes) 76 AC_DEFINE(HAVE_VFS_READDIR, 1, 77 [fops->readdir() is available]) 78 ],[ 79 ZFS_LINUX_TEST_ERROR([vfs_iterate]) 80 ]) 81 ]) 82 ]) 83]) 84