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vfs: Add inode uid,gid,mode init helper

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Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Dmitry Monakhov 2010-03-04 17:29:14 +03:00 committed by Al Viro
parent 52957fe1c7
commit a1bd120d13
2 changed files with 22 additions and 1 deletions
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20
fs/inode.c
View file

@ -1606,3 +1606,23 @@ void init_special_inode(struct inode *inode, umode_t mode, dev_t rdev)
inode->i_ino);
}
EXPORT_SYMBOL(init_special_inode);
/**
* Init uid,gid,mode for new inode according to posix standards
* @inode: New inode
* @dir: Directory inode
* @mode: mode of the new inode
*/
void inode_init_owner(struct inode *inode, const struct inode *dir,
mode_t mode)
{
inode->i_uid = current_fsuid();
if (dir && dir->i_mode & S_ISGID) {
inode->i_gid = dir->i_gid;
if (S_ISDIR(mode))
mode |= S_ISGID;
} else
inode->i_gid = current_fsgid();
inode->i_mode = mode;
}
EXPORT_SYMBOL(inode_init_owner);

3
include/linux/fs.h
View file

@ -1428,7 +1428,8 @@ extern void dentry_unhash(struct dentry *dentry);
* VFS file helper functions.
*/
extern int file_permission(struct file *, int);
extern void inode_init_owner(struct inode *inode, const struct inode *dir,
mode_t mode);
/*
* VFS FS_IOC_FIEMAP helper definitions.
*/