0f37d0c8be
Commit torvalds/linux@2233f31aad replaced ->readdir() with ->iterate() in struct file_operations. All filesystems must now use the new ->iterate method. To handle this the code was reworked to use the new ->iterate interface. Care was taken to keep the majority of changes confined to the ZPL layer which is already Linux specific. However, minor changes were required to the common zfs_readdir() function. Compatibility with older kernels was accomplished by adding versions of the trivial dir_emit* helper functions. Also the various *_readdir() functions were reworked in to wrappers which create a dir_context structure to pass to the new *_iterate() functions. Unfortunately, the new dir_emit* functions prevent us from passing a private pointer to the filldir function. The xattr directory code leveraged this ability through zfs_readdir() to generate the list of xattr names. Since we can no longer use zfs_readdir() a simplified zpl_xattr_readdir() function was added to perform the same task. Signed-off-by: Richard Yao <ryao@cs.stonybrook.edu> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #1653 Issue #1591
44 lines
989 B
Plaintext
44 lines
989 B
Plaintext
dnl #
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dnl # 3.11 API change
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_VFS_ITERATE], [
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AC_MSG_CHECKING([whether fops->iterate() is available])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/fs.h>
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int iterate(struct file *filp, struct dir_context * context)
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{ return 0; }
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static const struct file_operations fops
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__attribute__ ((unused)) = {
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.iterate = iterate,
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};
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],[
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_VFS_ITERATE, 1,
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[fops->iterate() is available])
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],[
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AC_MSG_RESULT(no)
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AC_MSG_CHECKING([whether fops->readdir() is available])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/fs.h>
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int readdir(struct file *filp, void *entry, filldir_t func)
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{ return 0; }
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static const struct file_operations fops
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__attribute__ ((unused)) = {
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.readdir = readdir,
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};
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],[
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_VFS_READDIR, 1,
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[fops->readdir() is available])
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],[
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AC_MSG_ERROR(no; file a bug report with ZFSOnLinux)
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])
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])
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])
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