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Drop support for 3 argument version of set_fs_pwd

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This was a suggestion that Brian Behlendorf made when reviewing an early
pull request for Linux 3.9 support. This commit was made intentionally
easy to revert should we ever have a reason to reintroduce support for
older kernels.

Signed-off-by: Richard Yao <ryao@cs.stonybrook.edu>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Richard Yao 2013-03-11 22:02:45 -04:00 committed by Brian Behlendorf
parent a54718cfe0
commit 8274ed5988
2 changed files with 2 additions and 65 deletions
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24
config/spl-build.m4
View File

@ -63,7 +63,6 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
SPL_AC_GET_ZONE_COUNTS
SPL_AC_USER_PATH_DIR
SPL_AC_SET_FS_PWD
SPL_AC_2ARGS_SET_FS_PWD
SPL_AC_SET_FS_PWD_WITH_CONST
SPL_AC_2ARGS_VFS_UNLINK
SPL_AC_4ARGS_VFS_RENAME
@ -1672,33 +1671,11 @@ AC_DEFUN([SPL_AC_SET_FS_PWD],
])
])
dnl #
dnl # 2.6.25 API change,
dnl # Simplied API by replacing mnt+dentry args with a single path arg.
dnl #
AC_DEFUN([SPL_AC_2ARGS_SET_FS_PWD],
[AC_MSG_CHECKING([whether set_fs_pwd() wants 2 args])
SPL_LINUX_TRY_COMPILE([
#include <linux/sched.h>
#include <linux/fs_struct.h>
],[
set_fs_pwd(NULL, NULL);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_2ARGS_SET_FS_PWD, 1,
[set_fs_pwd() wants 2 args])
HAVE_2ARGS_SET_FS_PWD=yes
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 3.9 API change
dnl # set_fs_pwd takes const struct path *
dnl #
AC_DEFUN([SPL_AC_SET_FS_PWD_WITH_CONST],
if test "x$HAVE_2ARGS_SET_FS_PWD" = xyes; then
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
[AC_MSG_CHECKING([whether set_fs_pwd() requires const struct path *])
@ -1732,7 +1709,6 @@ if test "x$HAVE_2ARGS_SET_FS_PWD" = xyes; then
])
])
EXTRA_KCFLAGS="$tmp_flags"
fi
])
dnl #

43
module/spl/spl-vnode.c
View File

@ -837,8 +837,6 @@ vn_releasef(int fd)
EXPORT_SYMBOL(releasef);
#ifndef HAVE_SET_FS_PWD
# ifdef HAVE_2ARGS_SET_FS_PWD
/* Used from 2.6.25 - 2.6.31+ */
void
# ifdef HAVE_SET_FS_PWD_WITH_CONST
set_fs_pwd(struct fs_struct *fs, const struct path *path)
@ -865,37 +863,16 @@ set_fs_pwd(struct fs_struct *fs, struct path *path)
if (old_pwd.dentry)
path_put(&old_pwd);
}
# else
/* Used from 2.6.11 - 2.6.24 */
void
set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt, struct dentry *dentry)
{
struct dentry *old_pwd;
struct vfsmount *old_pwdmnt;
write_lock(&fs->lock);
old_pwd = fs->pwd;
old_pwdmnt = fs->pwdmnt;
fs->pwdmnt = mntget(mnt);
fs->pwd = dget(dentry);
write_unlock(&fs->lock);
if (old_pwd) {
dput(old_pwd);
mntput(old_pwdmnt);
}
}
# endif /* HAVE_2ARGS_SET_FS_PWD */
#endif /* HAVE_SET_FS_PWD */
int
vn_set_pwd(const char *filename)
{
#if defined(HAVE_2ARGS_SET_FS_PWD) && defined(HAVE_USER_PATH_DIR)
#ifdef HAVE_USER_PATH_DIR
struct path path;
#else
struct nameidata nd;
#endif /* HAVE_2ARGS_SET_FS_PWD */
#endif /* HAVE_USER_PATH_DIR */
mm_segment_t saved_fs;
int rc;
SENTRY;
@ -908,7 +885,6 @@ vn_set_pwd(const char *filename)
saved_fs = get_fs();
set_fs(get_ds());
#ifdef HAVE_2ARGS_SET_FS_PWD
# ifdef HAVE_USER_PATH_DIR
rc = user_path_dir(filename, &path);
if (rc)
@ -937,21 +913,6 @@ dput_and_out:
dput_and_out:
path_put(&nd.path);
# endif /* HAVE_USER_PATH_DIR */
#else
rc = __user_walk(filename,
LOOKUP_FOLLOW|LOOKUP_DIRECTORY|LOOKUP_CHDIR, &nd);
if (rc)
SGOTO(out, rc);
rc = vfs_permission(&nd, MAY_EXEC);
if (rc)
SGOTO(dput_and_out, rc);
set_fs_pwd(current->fs, nd.nd_mnt, nd.nd_dentry);
dput_and_out:
vn_path_release(&nd);
#endif /* HAVE_2ARGS_SET_FS_PWD */
out:
set_fs(saved_fs);