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Linux 4.9 compat: iops->rename() wants flags 

In Linux 4.9, torvalds/linux@2773bf0, iops->rename() and iops->rename2() are
merged together into iops->rename(), it now wants flags.

Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
This commit is contained in:
Chunwei Chen 2016-10-19 11:19:01 -07:00 committed by Brian Behlendorf
parent c0716f13ef
commit 28172e8aa7
4 changed files with 65 additions and 5 deletions
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25
config/kernel-rename.m4 Normal file
View File

@ -0,0 +1,25 @@
dnl #
dnl # 4.9 API change,
dnl # iops->rename2() merged into iops->rename(), and iops->rename() now wants
dnl # flags.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_RENAME_WANTS_FLAGS], [
AC_MSG_CHECKING([whether iops->rename() wants flags])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
int rename_fn(struct inode *sip, struct dentry *sdp,
struct inode *tip, struct dentry *tdp,
unsigned int flags) { return 0; }
static const struct inode_operations
iops __attribute__ ((unused)) = {
.rename = rename_fn,
};
],[
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_RENAME_WANTS_FLAGS, 1, [iops->rename() wants flags])
],[
AC_MSG_RESULT(no)
])
])

1
config/kernel.m4
View File

@ -99,6 +99,7 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
ZFS_AC_KERNEL_FOLLOW_DOWN_ONE
ZFS_AC_KERNEL_MAKE_REQUEST_FN
ZFS_AC_KERNEL_GENERIC_IO_ACCT
ZFS_AC_KERNEL_RENAME_WANTS_FLAGS
AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"

23
module/zfs/zpl_ctldir.c
View File

@ -301,13 +301,17 @@ zpl_snapdir_readdir(struct file *filp, void *dirent, filldir_t filldir)
}
#endif /* HAVE_VFS_ITERATE */
int
zpl_snapdir_rename(struct inode *sdip, struct dentry *sdentry,
struct inode *tdip, struct dentry *tdentry)
static int
zpl_snapdir_rename2(struct inode *sdip, struct dentry *sdentry,
struct inode *tdip, struct dentry *tdentry, unsigned int flags)
{
cred_t *cr = CRED();
int error;
/* We probably don't want to support renameat2(2) in ctldir */
if (flags)
return (-EINVAL);
crhold(cr);
error = -zfsctl_snapdir_rename(sdip, dname(sdentry),
tdip, dname(tdentry), cr, 0);
@ -317,6 +321,15 @@ zpl_snapdir_rename(struct inode *sdip, struct dentry *sdentry,
return (error);
}
#ifndef HAVE_RENAME_WANTS_FLAGS
static int
zpl_snapdir_rename(struct inode *sdip, struct dentry *sdentry,
struct inode *tdip, struct dentry *tdentry)
{
return (zpl_snapdir_rename2(sdip, sdentry, tdip, tdentry, 0));
}
#endif
static int
zpl_snapdir_rmdir(struct inode *dip, struct dentry *dentry)
{
@ -405,7 +418,11 @@ const struct file_operations zpl_fops_snapdir = {
const struct inode_operations zpl_ops_snapdir = {
.lookup = zpl_snapdir_lookup,
.getattr = zpl_snapdir_getattr,
#ifdef HAVE_RENAME_WANTS_FLAGS
.rename = zpl_snapdir_rename2,
#else
.rename = zpl_snapdir_rename,
#endif
.rmdir = zpl_snapdir_rmdir,
.mkdir = zpl_snapdir_mkdir,
};

21
module/zfs/zpl_inode.c
View File

@ -353,13 +353,17 @@ zpl_setattr(struct dentry *dentry, struct iattr *ia)
}
static int
zpl_rename(struct inode *sdip, struct dentry *sdentry,
struct inode *tdip, struct dentry *tdentry)
zpl_rename2(struct inode *sdip, struct dentry *sdentry,
struct inode *tdip, struct dentry *tdentry, unsigned int flags)
{
cred_t *cr = CRED();
int error;
fstrans_cookie_t cookie;
/* We don't have renameat2(2) support */
if (flags)
return (-EINVAL);
crhold(cr);
cookie = spl_fstrans_mark();
error = -zfs_rename(sdip, dname(sdentry), tdip, dname(tdentry), cr, 0);
@ -370,6 +374,15 @@ zpl_rename(struct inode *sdip, struct dentry *sdentry,
return (error);
}
#ifndef HAVE_RENAME_WANTS_FLAGS
static int
zpl_rename(struct inode *sdip, struct dentry *sdentry,
struct inode *tdip, struct dentry *tdentry)
{
return (zpl_rename2(sdip, sdentry, tdip, tdentry, 0));
}
#endif
static int
zpl_symlink(struct inode *dir, struct dentry *dentry, const char *name)
{
@ -678,7 +691,11 @@ const struct inode_operations zpl_dir_inode_operations = {
.mkdir = zpl_mkdir,
.rmdir = zpl_rmdir,
.mknod = zpl_mknod,
#ifdef HAVE_RENAME_WANTS_FLAGS
.rename = zpl_rename2,
#else
.rename = zpl_rename,
#endif
.setattr = zpl_setattr,
.getattr = zpl_getattr,
.setxattr = generic_setxattr,