autofs4: add miscellaneous device for ioctls

[linux-2.6-omap-h63xx.git] / fs / autofs4 / autofs_i.h

diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index c3d352d7fa9304cb44c6ec4e4542bbc46f8ec2b2..e0f16da00e54294912bfd3a36fab3a09d0f1741f 100644 (file)
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -14,6 +14,7 @@
 /* Internal header file for autofs */
 
 #include <linux/auto_fs4.h>
+#include <linux/auto_dev-ioctl.h>
 #include <linux/mutex.h>
 #include <linux/list.h>
 
@@ -21,6 +22,11 @@
 #define AUTOFS_IOC_FIRST     AUTOFS_IOC_READY
 #define AUTOFS_IOC_COUNT     32
 
+#define AUTOFS_DEV_IOCTL_IOC_FIRST     (AUTOFS_DEV_IOCTL_VERSION)
+#define AUTOFS_DEV_IOCTL_IOC_COUNT     (AUTOFS_IOC_COUNT - 11)
+
+#define AUTOFS_TYPE_TRIGGER    (AUTOFS_TYPE_DIRECT|AUTOFS_TYPE_OFFSET)
+
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/time.h>
@@ -35,11 +41,27 @@
 /* #define DEBUG */
 
 #ifdef DEBUG
-#define DPRINTK(fmt,args...) do { printk(KERN_DEBUG "pid %d: %s: " fmt "\n" , current->pid , __func__ , ##args); } while(0)
+#define DPRINTK(fmt, args...)                          \
+do {                                                   \
+       printk(KERN_DEBUG "pid %d: %s: " fmt "\n",      \
+               current->pid, __func__, ##args);        \
+} while (0)
 #else
-#define DPRINTK(fmt,args...) do {} while(0)
+#define DPRINTK(fmt, args...) do {} while (0)
 #endif
 
+#define AUTOFS_WARN(fmt, args...)                      \
+do {                                                   \
+       printk(KERN_WARNING "pid %d: %s: " fmt "\n",    \
+               current->pid, __func__, ##args);        \
+} while (0)
+
+#define AUTOFS_ERROR(fmt, args...)                     \
+do {                                                   \
+       printk(KERN_ERR "pid %d: %s: " fmt "\n",        \
+               current->pid, __func__, ##args);        \
+} while (0)
+
 /* 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
@@ -52,12 +74,18 @@ struct autofs_info {
 
        int             flags;
 
-       struct list_head rehash;
+       struct completion expire_complete;
+
+       struct list_head active;
+       struct list_head expiring;
 
        struct autofs_sb_info *sbi;
        unsigned long last_used;
        atomic_t count;
 
+       uid_t uid;
+       gid_t gid;
+
        mode_t  mode;
        size_t  size;
 
@@ -68,15 +96,14 @@ struct autofs_info {
 };
 
 #define AUTOFS_INF_EXPIRING    (1<<0) /* dentry is in the process of expiring */
+#define AUTOFS_INF_MOUNTPOINT  (1<<1) /* mountpoint status for direct expire */
 
 struct autofs_wait_queue {
        wait_queue_head_t queue;
        struct autofs_wait_queue *next;
        autofs_wqt_t wait_queue_token;
        /* We use the following to see what we are waiting for */
-       unsigned int hash;
-       unsigned int len;
-       char *name;
+       struct qstr name;
        u32 dev;
        u64 ino;
        uid_t uid;
@@ -85,15 +112,11 @@ struct autofs_wait_queue {
        pid_t tgid;
        /* This is for status reporting upon return */
        int status;
-       atomic_t wait_ctr;
+       unsigned int 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;
@@ -112,8 +135,9 @@ struct autofs_sb_info {
        struct mutex wq_mutex;
        spinlock_t fs_lock;
        struct autofs_wait_queue *queues; /* Wait queue pointer */
-       spinlock_t rehash_lock;
-       struct list_head rehash_list;
+       spinlock_t lookup_lock;
+       struct list_head active_list;
+       struct list_head expiring_list;
 };
 
 static inline struct autofs_sb_info *autofs4_sbi(struct super_block *sb)
@@ -138,18 +162,14 @@ static inline int autofs4_oz_mode(struct autofs_sb_info *sbi) {
 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);
-       }
+       if (inf->flags & AUTOFS_INF_EXPIRING)
+               return 1;
 
-       return pending;
+       return 0;
 }
 
 static inline void autofs4_copy_atime(struct file *src, struct file *dst)
@@ -164,11 +184,23 @@ void autofs4_free_ino(struct autofs_info *);
 
 /* Expiration */
 int is_autofs4_dentry(struct dentry *);
+int autofs4_expire_wait(struct dentry *dentry);
 int autofs4_expire_run(struct super_block *, struct vfsmount *,
                        struct autofs_sb_info *,
                        struct autofs_packet_expire __user *);
 int autofs4_expire_multi(struct super_block *, struct vfsmount *,
                        struct autofs_sb_info *, int __user *);
+struct dentry *autofs4_expire_direct(struct super_block *sb,
+                                    struct vfsmount *mnt,
+                                    struct autofs_sb_info *sbi, int how);
+struct dentry *autofs4_expire_indirect(struct super_block *sb,
+                                      struct vfsmount *mnt,
+                                      struct autofs_sb_info *sbi, int how);
+
+/* Device node initialization */
+
+int autofs_dev_ioctl_init(void);
+void autofs_dev_ioctl_exit(void);
 
 /* Operations structures */