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Update tmpfile() existence detection 

Linux changed the tmpfile() signature again in torvalds/linux@6521f89,
which in turn broke our HAVE_TMPFILE detection in configure.

Update that macro to include the new case, and change the signature of
zpl_tmpfile as appropriate.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rich Ercolani <rincebrain@gmail.com>
Closes: #12060
Closes: #12087
This commit is contained in:
Rich Ercolani 2021-05-20 19:02:36 -04:00 committed by Tony Hutter
parent 87b5e7fb1d
commit 88891b804b
2 changed files with 29 additions and 4 deletions
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20
config/kernel-tmpfile.m4
View File

@ -3,6 +3,20 @@ dnl # 3.11 API change
dnl # Add support for i_op->tmpfile
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_TMPFILE], [
dnl #
dnl # 5.11 API change
dnl # add support for userns parameter to tmpfile
dnl #
ZFS_LINUX_TEST_SRC([inode_operations_tmpfile_userns], [
#include <linux/fs.h>
int tmpfile(struct user_namespace *userns,
struct inode *inode, struct dentry *dentry,
umode_t mode) { return 0; }
static struct inode_operations
iops __attribute__ ((unused)) = {
.tmpfile = tmpfile,
};
],[])
ZFS_LINUX_TEST_SRC([inode_operations_tmpfile], [
#include <linux/fs.h>
int tmpfile(struct inode *inode, struct dentry *dentry,
@ -16,10 +30,16 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_TMPFILE], [
AC_DEFUN([ZFS_AC_KERNEL_TMPFILE], [
AC_MSG_CHECKING([whether i_op->tmpfile() exists])
ZFS_LINUX_TEST_RESULT([inode_operations_tmpfile_userns], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_TMPFILE, 1, [i_op->tmpfile() exists])
AC_DEFINE(HAVE_TMPFILE_USERNS, 1, [i_op->tmpfile() has userns])
],[
ZFS_LINUX_TEST_RESULT([inode_operations_tmpfile], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_TMPFILE, 1, [i_op->tmpfile() exists])
],[
AC_MSG_RESULT(no)
])
])
])

5
module/os/linux/zfs/zpl_inode.c
View File

@ -218,7 +218,12 @@ zpl_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
#ifdef HAVE_TMPFILE
static int
#ifdef HAVE_TMPFILE_USERNS
zpl_tmpfile(struct user_namespace *userns, struct inode *dir,
struct dentry *dentry, umode_t mode)
#else
zpl_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
#endif
{
cred_t *cr = CRED();
struct inode *ip;