1 files changed, 164 insertions, 0 deletions

diff --git a/fs/autofs/autofs_i.h b/fs/autofs/autofs_i.h
new file mode 100644
index 000000000000..6171431272dc
--- /dev/null
+++ b/fs/autofs/autofs_i.h
@@ -0,0 +1,164 @@
+/* -*- linux-c -*- ------------------------------------------------------- *
+ *   
+ * linux/fs/autofs/autofs_i.h
+ *
+ *   Copyright 1997-1998 Transmeta Corporation - All Rights Reserved
+ *
+ * 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
+ * option, any later version, incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+/* Internal header file for autofs */
+
+#include <linux/auto_fs.h>
+
+/* This is the range of ioctl() numbers we claim as ours */
+#define AUTOFS_IOC_FIRST     AUTOFS_IOC_READY
+#define AUTOFS_IOC_COUNT     32
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/string.h>
+#include <linux/wait.h>
+#include <linux/dcache.h>
+#include <linux/namei.h>
+#include <linux/mount.h>
+#include <linux/sched.h>
+
+#include <asm/current.h>
+#include <asm/uaccess.h>
+
+#ifdef DEBUG
+#define DPRINTK(D) (printk D)
+#else
+#define DPRINTK(D) ((void)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 */
+
+/* Structures associated with the root directory hash table */
+
+#define AUTOFS_HASH_SIZE 67
+
+struct autofs_dir_ent {
+        int hash;
+        char *name;
+        int len;
+        ino_t ino;
+        struct dentry *dentry;
+        /* Linked list of entries */
+        struct autofs_dir_ent *next;
+        struct autofs_dir_ent **back;
+        /* The following entries are for the expiry system */
+        unsigned long last_usage;
+        struct list_head exp;
+};
+
+struct autofs_dirhash {
+        struct autofs_dir_ent *h[AUTOFS_HASH_SIZE];
+        struct list_head expiry_head;
+};
+
+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 */
+        int hash;
+        int len;
+        char *name;
+        /* This is for status reporting upon return */
+        int status;
+        int wait_ctr;
+};
+
+struct autofs_symlink {
+        char *data;
+        int len;
+        time_t mtime;
+};
+
+#define AUTOFS_MAX_SYMLINKS 256
+
+#define AUTOFS_ROOT_INO      1
+#define AUTOFS_FIRST_SYMLINK 2
+#define AUTOFS_FIRST_DIR_INO (AUTOFS_FIRST_SYMLINK+AUTOFS_MAX_SYMLINKS)
+
+#define AUTOFS_SYMLINK_BITMAP_LEN \
+        ((AUTOFS_MAX_SYMLINKS+((sizeof(long)*1)-1))/(sizeof(long)*8))
+
+#define AUTOFS_SBI_MAGIC 0x6d4a556d
+
+struct autofs_sb_info {
+        u32 magic;
+        struct file *pipe;
+        pid_t oz_pgrp;
+        int catatonic;
+        unsigned long exp_timeout;
+        ino_t next_dir_ino;
+        struct autofs_wait_queue *queues; /* Wait queue pointer */
+        struct autofs_dirhash dirhash; /* Root directory hash */
+        struct autofs_symlink symlink[AUTOFS_MAX_SYMLINKS];
+        unsigned long symlink_bitmap[AUTOFS_SYMLINK_BITMAP_LEN];
+};
+
+static inline struct autofs_sb_info *autofs_sbi(struct super_block *sb)
+{
+        return (struct autofs_sb_info *)(sb->s_fs_info);
+}
+
+/* autofs_oz_mode(): do we see the man behind the curtain?  (The
+   processes which do manipulations for us in user space sees the raw
+   filesystem without "magic".) */
+
+static inline int autofs_oz_mode(struct autofs_sb_info *sbi) {
+        return sbi->catatonic || process_group(current) == sbi->oz_pgrp;
+}
+
+/* Hash operations */
+
+void autofs_initialize_hash(struct autofs_dirhash *);
+struct autofs_dir_ent *autofs_hash_lookup(const struct autofs_dirhash *,struct qstr *);
+void autofs_hash_insert(struct autofs_dirhash *,struct autofs_dir_ent *);
+void autofs_hash_delete(struct autofs_dir_ent *);
+struct autofs_dir_ent *autofs_hash_enum(const struct autofs_dirhash *,off_t *,struct autofs_dir_ent *);
+void autofs_hash_dputall(struct autofs_dirhash *);
+void autofs_hash_nuke(struct autofs_dirhash *);
+
+/* Expiration-handling functions */
+
+void autofs_update_usage(struct autofs_dirhash *,struct autofs_dir_ent *);
+struct autofs_dir_ent *autofs_expire(struct super_block *,struct autofs_sb_info *, struct vfsmount *mnt);
+
+/* Operations structures */
+
+extern struct inode_operations autofs_root_inode_operations;
+extern struct inode_operations autofs_symlink_inode_operations;
+extern struct file_operations autofs_root_operations;
+
+/* Initializing function */
+
+int autofs_fill_super(struct super_block *, void *, int);
+
+/* Queue management functions */
+
+int autofs_wait(struct autofs_sb_info *,struct qstr *);
+int autofs_wait_release(struct autofs_sb_info *,autofs_wqt_t,int);
+void autofs_catatonic_mode(struct autofs_sb_info *);
+
+#ifdef DEBUG
+void autofs_say(const char *name, int len);
+#else
+#define autofs_say(n,l) ((void)0)
+#endif