192 lines
6.1 KiB
C
192 lines
6.1 KiB
C
/*
|
|
*
|
|
* Copyright (C) 2011 Novell Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published by
|
|
* the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
struct ovl_entry;
|
|
|
|
enum ovl_path_type {
|
|
OVL_PATH_PURE_UPPER,
|
|
OVL_PATH_UPPER,
|
|
OVL_PATH_MERGE,
|
|
OVL_PATH_LOWER,
|
|
};
|
|
|
|
extern const char *ovl_opaque_xattr;
|
|
|
|
static inline int ovl_do_rmdir(struct inode *dir, struct dentry *dentry)
|
|
{
|
|
int err = vfs_rmdir(dir, dentry);
|
|
pr_debug("rmdir(%pd2) = %i\n", dentry, err);
|
|
return err;
|
|
}
|
|
|
|
static inline int ovl_do_unlink(struct inode *dir, struct dentry *dentry)
|
|
{
|
|
int err = vfs_unlink(dir, dentry, NULL);
|
|
pr_debug("unlink(%pd2) = %i\n", dentry, err);
|
|
return err;
|
|
}
|
|
|
|
static inline int ovl_do_link(struct dentry *old_dentry, struct inode *dir,
|
|
struct dentry *new_dentry, bool debug)
|
|
{
|
|
int err = vfs_link(old_dentry, dir, new_dentry, NULL);
|
|
if (debug) {
|
|
pr_debug("link(%pd2, %pd2) = %i\n",
|
|
old_dentry, new_dentry, err);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static inline int ovl_do_create(struct inode *dir, struct dentry *dentry,
|
|
umode_t mode, bool debug)
|
|
{
|
|
int err = vfs_create(dir, dentry, mode, true);
|
|
if (debug)
|
|
pr_debug("create(%pd2, 0%o) = %i\n", dentry, mode, err);
|
|
return err;
|
|
}
|
|
|
|
static inline int ovl_do_mkdir(struct inode *dir, struct dentry *dentry,
|
|
umode_t mode, bool debug)
|
|
{
|
|
int err = vfs_mkdir(dir, dentry, mode);
|
|
if (debug)
|
|
pr_debug("mkdir(%pd2, 0%o) = %i\n", dentry, mode, err);
|
|
return err;
|
|
}
|
|
|
|
static inline int ovl_do_mknod(struct inode *dir, struct dentry *dentry,
|
|
umode_t mode, dev_t dev, bool debug)
|
|
{
|
|
int err = vfs_mknod(dir, dentry, mode, dev);
|
|
if (debug) {
|
|
pr_debug("mknod(%pd2, 0%o, 0%o) = %i\n",
|
|
dentry, mode, dev, err);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static inline int ovl_do_symlink(struct inode *dir, struct dentry *dentry,
|
|
const char *oldname, bool debug)
|
|
{
|
|
int err = vfs_symlink(dir, dentry, oldname);
|
|
if (debug)
|
|
pr_debug("symlink(\"%s\", %pd2) = %i\n", oldname, dentry, err);
|
|
return err;
|
|
}
|
|
|
|
static inline int ovl_do_setxattr(struct dentry *dentry, const char *name,
|
|
const void *value, size_t size, int flags)
|
|
{
|
|
int err = vfs_setxattr(dentry, name, value, size, flags);
|
|
pr_debug("setxattr(%pd2, \"%s\", \"%*s\", 0x%x) = %i\n",
|
|
dentry, name, (int) size, (char *) value, flags, err);
|
|
return err;
|
|
}
|
|
|
|
static inline int ovl_do_removexattr(struct dentry *dentry, const char *name)
|
|
{
|
|
int err = vfs_removexattr(dentry, name);
|
|
pr_debug("removexattr(%pd2, \"%s\") = %i\n", dentry, name, err);
|
|
return err;
|
|
}
|
|
|
|
static inline int ovl_do_rename(struct inode *olddir, struct dentry *olddentry,
|
|
struct inode *newdir, struct dentry *newdentry,
|
|
unsigned int flags)
|
|
{
|
|
int err;
|
|
|
|
pr_debug("rename2(%pd2, %pd2, 0x%x)\n",
|
|
olddentry, newdentry, flags);
|
|
|
|
err = vfs_rename(olddir, olddentry, newdir, newdentry, NULL, flags);
|
|
|
|
if (err) {
|
|
pr_debug("...rename2(%pd2, %pd2, ...) = %i\n",
|
|
olddentry, newdentry, err);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static inline int ovl_do_whiteout(struct inode *dir, struct dentry *dentry)
|
|
{
|
|
int err = vfs_whiteout(dir, dentry);
|
|
pr_debug("whiteout(%pd2) = %i\n", dentry, err);
|
|
return err;
|
|
}
|
|
|
|
enum ovl_path_type ovl_path_type(struct dentry *dentry);
|
|
u64 ovl_dentry_version_get(struct dentry *dentry);
|
|
void ovl_dentry_version_inc(struct dentry *dentry);
|
|
void ovl_path_upper(struct dentry *dentry, struct path *path);
|
|
void ovl_path_lower(struct dentry *dentry, struct path *path);
|
|
enum ovl_path_type ovl_path_real(struct dentry *dentry, struct path *path);
|
|
struct dentry *ovl_dentry_upper(struct dentry *dentry);
|
|
struct dentry *ovl_dentry_lower(struct dentry *dentry);
|
|
struct dentry *ovl_dentry_real(struct dentry *dentry);
|
|
struct dentry *ovl_entry_real(struct ovl_entry *oe, bool *is_upper);
|
|
struct ovl_dir_cache *ovl_dir_cache(struct dentry *dentry);
|
|
void ovl_set_dir_cache(struct dentry *dentry, struct ovl_dir_cache *cache);
|
|
struct dentry *ovl_workdir(struct dentry *dentry);
|
|
int ovl_want_write(struct dentry *dentry);
|
|
void ovl_drop_write(struct dentry *dentry);
|
|
bool ovl_dentry_is_opaque(struct dentry *dentry);
|
|
void ovl_dentry_set_opaque(struct dentry *dentry, bool opaque);
|
|
bool ovl_is_whiteout(struct dentry *dentry);
|
|
void ovl_dentry_update(struct dentry *dentry, struct dentry *upperdentry);
|
|
struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
|
|
unsigned int flags);
|
|
struct file *ovl_path_open(struct path *path, int flags);
|
|
|
|
struct dentry *ovl_upper_create(struct dentry *upperdir, struct dentry *dentry,
|
|
struct kstat *stat, const char *link);
|
|
|
|
/* readdir.c */
|
|
extern const struct file_operations ovl_dir_operations;
|
|
int ovl_check_empty_dir(struct dentry *dentry, struct list_head *list);
|
|
void ovl_cleanup_whiteouts(struct dentry *upper, struct list_head *list);
|
|
void ovl_cache_free(struct list_head *list);
|
|
|
|
/* inode.c */
|
|
int ovl_setattr(struct dentry *dentry, struct iattr *attr);
|
|
int ovl_permission(struct inode *inode, int mask);
|
|
int ovl_setxattr(struct dentry *dentry, const char *name,
|
|
const void *value, size_t size, int flags);
|
|
ssize_t ovl_getxattr(struct dentry *dentry, const char *name,
|
|
void *value, size_t size);
|
|
ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size);
|
|
int ovl_removexattr(struct dentry *dentry, const char *name);
|
|
|
|
struct inode *ovl_new_inode(struct super_block *sb, umode_t mode,
|
|
struct ovl_entry *oe);
|
|
static inline void ovl_copyattr(struct inode *from, struct inode *to)
|
|
{
|
|
to->i_uid = from->i_uid;
|
|
to->i_gid = from->i_gid;
|
|
}
|
|
|
|
/* dir.c */
|
|
extern const struct inode_operations ovl_dir_inode_operations;
|
|
struct dentry *ovl_lookup_temp(struct dentry *workdir, struct dentry *dentry);
|
|
int ovl_create_real(struct inode *dir, struct dentry *newdentry,
|
|
struct kstat *stat, const char *link,
|
|
struct dentry *hardlink, bool debug);
|
|
void ovl_cleanup(struct inode *dir, struct dentry *dentry);
|
|
|
|
/* copy_up.c */
|
|
int ovl_copy_up(struct dentry *dentry);
|
|
int ovl_copy_up_one(struct dentry *parent, struct dentry *dentry,
|
|
struct path *lowerpath, struct kstat *stat,
|
|
struct iattr *attr);
|
|
int ovl_copy_xattr(struct dentry *old, struct dentry *new);
|
|
int ovl_set_attr(struct dentry *upper, struct kstat *stat);
|