static int autofs_root_rmdir(struct inode *dir, struct dentry *dentry)
{
struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb);
struct autofs_dirhash *dh = &sbi->dirhash;
struct autofs_dir_ent *ent;
lock_kernel();
if (!autofs_oz_mode(sbi)) {
unlock_kernel();
return -EACCES;
}
ent = autofs_hash_lookup(dh, &dentry->d_name);
if (!ent) {
unlock_kernel();
return -ENOENT;
}
if ((unsigned int)ent->ino < AUTOFS_FIRST_DIR_INO) {
unlock_kernel();
return -ENOTDIR; /* Not a directory */
}
if (ent->dentry != dentry) {
printk("autofs_rmdir: odentry != dentry for entry %s\n", dentry->d_name.name);
}
dentry->d_time = (unsigned long)(struct autofs_dir_ent *)NULL;
autofs_hash_delete(ent);
drop_nlink(dir);
d_drop(dentry);
unlock_kernel();
return 0;
}
/*
* NOTE!
*
* Normal filesystems would do a "d_delete()" to tell the VFS dcache
* that the file no longer exists. However, doing that means that the
* VFS layer can turn the dentry into a negative dentry, which we
* obviously do not want (we're dropping the entry not because it
* doesn't exist, but because it has timed out).
*
* Also see autofs_root_rmdir()..
*/
static int autofs_root_unlink(struct inode *dir, struct dentry *dentry)
{
struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb);
struct autofs_dirhash *dh = &sbi->dirhash;
struct autofs_dir_ent *ent;
unsigned int n;
/* This allows root to remove symlinks */
if ( !autofs_oz_mode(sbi) && !capable(CAP_SYS_ADMIN) )
return -EACCES;
ent = autofs_hash_lookup(dh, &dentry->d_name);
if ( !ent )
return -ENOENT;
n = ent->ino - AUTOFS_FIRST_SYMLINK;
if ( n >= AUTOFS_MAX_SYMLINKS )
return -EISDIR; /* It's a directory, dummy */
if ( !test_bit(n,sbi->symlink_bitmap) )
return -EINVAL; /* Nonexistent symlink? Shouldn't happen */
dentry->d_time = (unsigned long)(struct autofs_dirhash *)NULL;
autofs_hash_delete(ent);
clear_bit(n,sbi->symlink_bitmap);
kfree(sbi->symlink[n].data);
d_drop(dentry);
return 0;
}
