* linux/fs/autofs/autofs_i.h
*
* Copyright 1997-1998 Transmeta Corporation - All Rights Reserved
+ * Copyright 2005-2006 Ian Kent <raven@themaw.net>
*
* This file is part of the Linux kernel and is made available under
* the terms of the GNU General Public License, version 2, or at your
/* Internal header file for autofs */
#include <linux/auto_fs4.h>
+#include <linux/mutex.h>
#include <linux/list.h>
/* This is the range of ioctl() numbers we claim as ours */
#include <linux/string.h>
#include <linux/wait.h>
#include <linux/sched.h>
+#include <linux/mount.h>
+#include <linux/namei.h>
#include <asm/current.h>
#include <asm/uaccess.h>
/* #define DEBUG */
#ifdef DEBUG
-#define DPRINTK(D) do{ printk("pid %d: ", current->pid); printk D; } while(0)
+#define DPRINTK(fmt,args...) do { printk(KERN_DEBUG "pid %d: %s: " fmt "\n" , current->pid , __FUNCTION__ , ##args); } while(0)
#else
-#define DPRINTK(D) do {} while(0)
+#define DPRINTK(fmt,args...) do {} while(0)
#endif
-#define AUTOFS_SUPER_MAGIC 0x0187
-
-/*
- * If the daemon returns a negative response (AUTOFS_IOC_FAIL) then the
- * kernel will keep the negative response cached for up to the time given
- * here, although the time can be shorter if the kernel throws the dcache
- * entry away. This probably should be settable from user space.
- */
-#define AUTOFS_NEGATIVE_TIMEOUT (60*HZ) /* 1 minute */
-
/* Unified info structure. This is pointed to by both the dentry and
inode structures. Each file in the filesystem has an instance of this
structure. It holds a reference to the dentry, so dentries are never
struct autofs_sb_info *sbi;
unsigned long last_used;
+ atomic_t count;
mode_t mode;
size_t size;
struct autofs_wait_queue *next;
autofs_wqt_t wait_queue_token;
/* We use the following to see what we are waiting for */
- int hash;
- int len;
+ unsigned int hash;
+ unsigned int len;
char *name;
+ u32 dev;
+ u64 ino;
+ uid_t uid;
+ gid_t gid;
+ pid_t pid;
+ pid_t tgid;
/* This is for status reporting upon return */
int status;
- int wait_ctr;
+ atomic_t wait_ctr;
};
#define AUTOFS_SBI_MAGIC 0x6d4a556d
+#define AUTOFS_TYPE_INDIRECT 0x0001
+#define AUTOFS_TYPE_DIRECT 0x0002
+#define AUTOFS_TYPE_OFFSET 0x0004
+
struct autofs_sb_info {
u32 magic;
+ int pipefd;
struct file *pipe;
pid_t oz_pgrp;
int catatonic;
int version;
+ int sub_version;
+ int min_proto;
+ int max_proto;
unsigned long exp_timeout;
+ unsigned int type;
+ int reghost_enabled;
+ int needs_reghost;
struct super_block *sb;
+ struct mutex wq_mutex;
+ spinlock_t fs_lock;
struct autofs_wait_queue *queues; /* Wait queue pointer */
};
static inline int autofs4_ispending(struct dentry *dentry)
{
struct autofs_info *inf = autofs4_dentry_ino(dentry);
+ int pending = 0;
+
+ if (dentry->d_flags & DCACHE_AUTOFS_PENDING)
+ return 1;
+
+ if (inf) {
+ spin_lock(&inf->sbi->fs_lock);
+ pending = inf->flags & AUTOFS_INF_EXPIRING;
+ spin_unlock(&inf->sbi->fs_lock);
+ }
+
+ return pending;
+}
- return (dentry->d_flags & DCACHE_AUTOFS_PENDING) ||
- (inf != NULL && inf->flags & AUTOFS_INF_EXPIRING);
+static inline void autofs4_copy_atime(struct file *src, struct file *dst)
+{
+ dst->f_path.dentry->d_inode->i_atime =
+ src->f_path.dentry->d_inode->i_atime;
+ return;
}
struct inode *autofs4_get_inode(struct super_block *, struct autofs_info *);
-struct autofs_info *autofs4_init_inf(struct autofs_sb_info *, mode_t mode);
void autofs4_free_ino(struct autofs_info *);
/* Expiration */
int is_autofs4_dentry(struct dentry *);
int autofs4_expire_run(struct super_block *, struct vfsmount *,
- struct autofs_sb_info *, struct autofs_packet_expire *);
+ struct autofs_sb_info *,
+ struct autofs_packet_expire __user *);
int autofs4_expire_multi(struct super_block *, struct vfsmount *,
- struct autofs_sb_info *, int *);
+ struct autofs_sb_info *, int __user *);
/* Operations structures */
extern struct inode_operations autofs4_symlink_inode_operations;
extern struct inode_operations autofs4_dir_inode_operations;
extern struct inode_operations autofs4_root_inode_operations;
-extern struct file_operations autofs4_root_operations;
+extern struct inode_operations autofs4_indirect_root_inode_operations;
+extern struct inode_operations autofs4_direct_root_inode_operations;
+extern const struct file_operations autofs4_dir_operations;
+extern const struct file_operations autofs4_root_operations;
/* Initializing function */
/* Queue management functions */
-enum autofs_notify
-{
- NFY_NONE,
- NFY_MOUNT,
- NFY_EXPIRE
-};
-
-int autofs4_wait(struct autofs_sb_info *,struct qstr *, enum autofs_notify);
+int autofs4_wait(struct autofs_sb_info *,struct dentry *, enum autofs_notify);
int autofs4_wait_release(struct autofs_sb_info *,autofs_wqt_t,int);
void autofs4_catatonic_mode(struct autofs_sb_info *);
+
+static inline int autofs4_follow_mount(struct vfsmount **mnt, struct dentry **dentry)
+{
+ int res = 0;
+
+ while (d_mountpoint(*dentry)) {
+ int followed = follow_down(mnt, dentry);
+ if (!followed)
+ break;
+ res = 1;
+ }
+ return res;
+}
+
+static inline u32 autofs4_get_dev(struct autofs_sb_info *sbi)
+{
+ return new_encode_dev(sbi->sb->s_dev);
+}
+
+static inline u64 autofs4_get_ino(struct autofs_sb_info *sbi)
+{
+ return sbi->sb->s_root->d_inode->i_ino;
+}
+
+static inline int simple_positive(struct dentry *dentry)
+{
+ return dentry->d_inode && !d_unhashed(dentry);
+}
+
+static inline int __simple_empty(struct dentry *dentry)
+{
+ struct dentry *child;
+ int ret = 0;
+
+ list_for_each_entry(child, &dentry->d_subdirs, d_u.d_child)
+ if (simple_positive(child))
+ goto out;
+ ret = 1;
+out:
+ return ret;
+}
+
+void autofs4_dentry_release(struct dentry *);
+extern void autofs4_kill_sb(struct super_block *);