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infra: replace sys_mkdir() by vfs_mkdir()

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This commit is contained in:
Thomas Schoebel-Theuer 2015-05-26 13:45:35 +02:00
parent 8fe84d32d8
commit c4b055584c
2 changed files with 52 additions and 0 deletions
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4
kernel/compat.h
View File

@ -47,6 +47,10 @@ extern int _compat_symlink(
const char __user *oldname,
const char __user *newname);
extern int _compat_mkdir(
const char __user *pathname,
int mode);
#endif /* HAS_MARS_PREPATCH */
#endif /* _MARS_COMPAT */

48
kernel/sy_old/sy_generic.c
View File

@ -204,6 +204,50 @@ out_putname:
return error;
}
/* code is stolen from mkdirat()
*/
int _compat_mkdir(const char __user *pathname,
int mode)
{
const int dfd = AT_FDCWD;
struct dentry *dentry;
struct path path;
int error;
unsigned int lookup_flags = LOOKUP_DIRECTORY;
#ifdef __HAS_RETRY_ESTALE
retry:
#endif
dentry = user_path_create(dfd, pathname, &path, lookup_flags);
if (IS_ERR(dentry))
return PTR_ERR(dentry);
if (!IS_POSIXACL(path.dentry->d_inode))
mode &= ~current_umask();
#ifndef __NEW_PATH_CREATE
error = mnt_want_write(path.mnt);
if (error)
goto out_dput;
#endif
error = vfs_mkdir(path.dentry->d_inode, dentry, mode);
#ifdef __NEW_PATH_CREATE
done_path_create(&path, dentry);
#else
mnt_drop_write(path.mnt);
out_dput:
dput(dentry);
mutex_unlock(&path.dentry->d_inode->i_mutex);
path_put(&path);
#endif
#ifdef __HAS_RETRY_ESTALE
if (retry_estale(error, lookup_flags)) {
lookup_flags |= LOOKUP_REVAL;
goto retry;
}
#endif
return error;
}
#endif
// end_remove_this
/////////////////////////////////////////////////////////////////////
@ -279,7 +323,11 @@ int mars_mkdir(const char *path)
oldfs = get_fs();
set_fs(get_ds());
#ifdef HAS_MARS_PREPATCH
status = sys_mkdir(path, 0700);
#else
status = _compat_mkdir(path, 0700);
#endif
set_fs(oldfs);
return status;