/* -*- linux-c -*- ------------------------------------------------------- *
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/* -*- linux-c -*- ------------------------------------------------------- *
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*
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*
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* linux/fs/autofs/autofs_i.h
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* linux/fs/autofs/autofs_i.h
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*
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*
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* Copyright 1997 Transmeta Corporation - All Rights Reserved
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* Copyright 1997 Transmeta Corporation - All Rights Reserved
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*
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*
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* This file is part of the Linux kernel and is made available under
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* This file is part of the Linux kernel and is made available under
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* the terms of the GNU General Public License, version 2, or at your
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* the terms of the GNU General Public License, version 2, or at your
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* option, any later version, incorporated herein by reference.
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* option, any later version, incorporated herein by reference.
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*
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*
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* ----------------------------------------------------------------------- */
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* ----------------------------------------------------------------------- */
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/* Internal header file for autofs */
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/* Internal header file for autofs */
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#include <linux/auto_fs.h>
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#include <linux/auto_fs.h>
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/* This is the range of ioctl() numbers we claim as ours */
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/* This is the range of ioctl() numbers we claim as ours */
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#define AUTOFS_IOC_FIRST AUTOFS_IOC_READY
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#define AUTOFS_IOC_FIRST AUTOFS_IOC_READY
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#define AUTOFS_IOC_COUNT 32
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#define AUTOFS_IOC_COUNT 32
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#include <linux/malloc.h>
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#include <linux/malloc.h>
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#include <linux/sched.h>
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#include <linux/sched.h>
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#include <linux/string.h>
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#include <linux/string.h>
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#include <linux/wait.h>
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#include <linux/wait.h>
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#define kver(a,b,c) (((a) << 16) + ((b) << 8) + (c))
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#define kver(a,b,c) (((a) << 16) + ((b) << 8) + (c))
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#if LINUX_VERSION_CODE < kver(2,1,0)
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#if LINUX_VERSION_CODE < kver(2,1,0)
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/* Segmentation stuff for pre-2.1 kernels */
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/* Segmentation stuff for pre-2.1 kernels */
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#include <asm/segment.h>
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#include <asm/segment.h>
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static inline int copy_to_user(void *dst, void *src, unsigned long len)
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static inline int copy_to_user(void *dst, void *src, unsigned long len)
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{
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{
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int rv = verify_area(VERIFY_WRITE, dst, len);
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int rv = verify_area(VERIFY_WRITE, dst, len);
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if ( rv )
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if ( rv )
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return -1;
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return -1;
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memcpy_tofs(dst,src,len);
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memcpy_tofs(dst,src,len);
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return 0;
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return 0;
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}
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}
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static inline int copy_from_user(void *dst, void *src, unsigned long len)
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static inline int copy_from_user(void *dst, void *src, unsigned long len)
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{
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{
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int rv = verify_area(VERIFY_READ, src, len);
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int rv = verify_area(VERIFY_READ, src, len);
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if ( rv )
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if ( rv )
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return -1;
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return -1;
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memcpy_fromfs(dst,src,len);
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memcpy_fromfs(dst,src,len);
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return 0;
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return 0;
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}
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}
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#else
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#else
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/* Segmentation stuff for post-2.1 kernels */
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/* Segmentation stuff for post-2.1 kernels */
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#include <asm/uaccess.h>
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#include <asm/uaccess.h>
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#define register_symtab(x) ((void)0)
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#define register_symtab(x) ((void)0)
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#endif
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#endif
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#ifdef DEBUG
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#ifdef DEBUG
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#define DPRINTK(D) printk D;
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#define DPRINTK(D) printk D;
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#else
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#else
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#define DPRINTK(D)
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#define DPRINTK(D)
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#endif
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#endif
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#define AUTOFS_SUPER_MAGIC 0x0187
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#define AUTOFS_SUPER_MAGIC 0x0187
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/* Structures associated with the root directory hash */
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/* Structures associated with the root directory hash */
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#define AUTOFS_HASH_SIZE 67
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#define AUTOFS_HASH_SIZE 67
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typedef u32 autofs_hash_t; /* Type returned by autofs_hash() */
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typedef u32 autofs_hash_t; /* Type returned by autofs_hash() */
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struct autofs_dir_ent {
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struct autofs_dir_ent {
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autofs_hash_t hash;
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autofs_hash_t hash;
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struct autofs_dir_ent *next;
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struct autofs_dir_ent *next;
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struct autofs_dir_ent **back;
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struct autofs_dir_ent **back;
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char *name;
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char *name;
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int len;
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int len;
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ino_t ino;
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ino_t ino;
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/* The following entries are for the expiry system */
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/* The following entries are for the expiry system */
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unsigned long last_usage;
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unsigned long last_usage;
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struct autofs_dir_ent *exp_next;
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struct autofs_dir_ent *exp_next;
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struct autofs_dir_ent *exp_prev;
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struct autofs_dir_ent *exp_prev;
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};
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};
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struct autofs_dirhash {
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struct autofs_dirhash {
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struct autofs_dir_ent *h[AUTOFS_HASH_SIZE];
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struct autofs_dir_ent *h[AUTOFS_HASH_SIZE];
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struct autofs_dir_ent expiry_head;
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struct autofs_dir_ent expiry_head;
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};
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};
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struct autofs_wait_queue {
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struct autofs_wait_queue {
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unsigned long wait_queue_token;
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unsigned long wait_queue_token;
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struct wait_queue *queue;
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struct wait_queue *queue;
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struct autofs_wait_queue *next;
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struct autofs_wait_queue *next;
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/* We use the following to see what we are waiting for */
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/* We use the following to see what we are waiting for */
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autofs_hash_t hash;
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autofs_hash_t hash;
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int len;
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int len;
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char *name;
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char *name;
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/* This is for status reporting upon return */
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/* This is for status reporting upon return */
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int status;
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int status;
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int wait_ctr;
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int wait_ctr;
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};
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};
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struct autofs_symlink {
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struct autofs_symlink {
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int len;
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int len;
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char *data;
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char *data;
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time_t mtime;
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time_t mtime;
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};
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};
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#define AUTOFS_MAX_SYMLINKS 256
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#define AUTOFS_MAX_SYMLINKS 256
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#define AUTOFS_ROOT_INO 1
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#define AUTOFS_ROOT_INO 1
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#define AUTOFS_FIRST_SYMLINK 2
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#define AUTOFS_FIRST_SYMLINK 2
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#define AUTOFS_FIRST_DIR_INO (AUTOFS_FIRST_SYMLINK+AUTOFS_MAX_SYMLINKS)
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#define AUTOFS_FIRST_DIR_INO (AUTOFS_FIRST_SYMLINK+AUTOFS_MAX_SYMLINKS)
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#define AUTOFS_SYMLINK_BITMAP_LEN ((AUTOFS_MAX_SYMLINKS+31)/32)
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#define AUTOFS_SYMLINK_BITMAP_LEN ((AUTOFS_MAX_SYMLINKS+31)/32)
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#ifndef END_OF_TIME
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#ifndef END_OF_TIME
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#define END_OF_TIME ((time_t)((unsigned long)((time_t)(~0UL)) >> 1))
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#define END_OF_TIME ((time_t)((unsigned long)((time_t)(~0UL)) >> 1))
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#endif
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#endif
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#define AUTOFS_SBI_MAGIC 0x6d4a556d
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#define AUTOFS_SBI_MAGIC 0x6d4a556d
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struct autofs_sb_info {
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struct autofs_sb_info {
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u32 magic;
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u32 magic;
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struct file *pipe;
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struct file *pipe;
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pid_t oz_pgrp;
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pid_t oz_pgrp;
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int catatonic;
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int catatonic;
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unsigned long exp_timeout;
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unsigned long exp_timeout;
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ino_t next_dir_ino;
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ino_t next_dir_ino;
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struct autofs_wait_queue *queues; /* Wait queue pointer */
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struct autofs_wait_queue *queues; /* Wait queue pointer */
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struct autofs_dirhash dirhash; /* Root directory hash */
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struct autofs_dirhash dirhash; /* Root directory hash */
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struct autofs_symlink symlink[AUTOFS_MAX_SYMLINKS];
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struct autofs_symlink symlink[AUTOFS_MAX_SYMLINKS];
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u32 symlink_bitmap[AUTOFS_SYMLINK_BITMAP_LEN];
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u32 symlink_bitmap[AUTOFS_SYMLINK_BITMAP_LEN];
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};
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};
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/* autofs_oz_mode(): do we see the man behind the curtain? */
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/* autofs_oz_mode(): do we see the man behind the curtain? */
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static inline int autofs_oz_mode(struct autofs_sb_info *sbi) {
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static inline int autofs_oz_mode(struct autofs_sb_info *sbi) {
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return sbi->catatonic || current->pgrp == sbi->oz_pgrp;
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return sbi->catatonic || current->pgrp == sbi->oz_pgrp;
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}
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}
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/* Debug the mysteriously disappearing wait list */
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/* Debug the mysteriously disappearing wait list */
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#ifdef DEBUG_WAITLIST
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#ifdef DEBUG_WAITLIST
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#define CHECK_WAITLIST(S,O) autofs_check_waitlist_integrity(S,O)
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#define CHECK_WAITLIST(S,O) autofs_check_waitlist_integrity(S,O)
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void autofs_check_waitlist_integrity(struct autofs_sb_info *,char *);
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void autofs_check_waitlist_integrity(struct autofs_sb_info *,char *);
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#else
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#else
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#define CHECK_WAITLIST(S,O)
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#define CHECK_WAITLIST(S,O)
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#endif
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#endif
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/* Hash operations */
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/* Hash operations */
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autofs_hash_t autofs_hash(const char *,int);
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autofs_hash_t autofs_hash(const char *,int);
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void autofs_initialize_hash(struct autofs_dirhash *);
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void autofs_initialize_hash(struct autofs_dirhash *);
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struct autofs_dir_ent *autofs_hash_lookup(const struct autofs_dirhash *,autofs_hash_t,const char *,int);
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struct autofs_dir_ent *autofs_hash_lookup(const struct autofs_dirhash *,autofs_hash_t,const char *,int);
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void autofs_hash_insert(struct autofs_dirhash *,struct autofs_dir_ent *);
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void autofs_hash_insert(struct autofs_dirhash *,struct autofs_dir_ent *);
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void autofs_hash_delete(struct autofs_dir_ent *);
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void autofs_hash_delete(struct autofs_dir_ent *);
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struct autofs_dir_ent *autofs_hash_enum(const struct autofs_dirhash *,off_t *);
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struct autofs_dir_ent *autofs_hash_enum(const struct autofs_dirhash *,off_t *);
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void autofs_hash_nuke(struct autofs_dirhash *);
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void autofs_hash_nuke(struct autofs_dirhash *);
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/* Expiration-handling functions */
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/* Expiration-handling functions */
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void autofs_update_usage(struct autofs_dirhash *,struct autofs_dir_ent *);
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void autofs_update_usage(struct autofs_dirhash *,struct autofs_dir_ent *);
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struct autofs_dir_ent *autofs_expire(struct autofs_dirhash *,unsigned long);
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struct autofs_dir_ent *autofs_expire(struct autofs_dirhash *,unsigned long);
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/* Operations structures */
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/* Operations structures */
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extern struct inode_operations autofs_root_inode_operations;
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extern struct inode_operations autofs_root_inode_operations;
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extern struct inode_operations autofs_symlink_inode_operations;
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extern struct inode_operations autofs_symlink_inode_operations;
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extern struct inode_operations autofs_dir_inode_operations;
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extern struct inode_operations autofs_dir_inode_operations;
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/* Initializing function */
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/* Initializing function */
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struct super_block *autofs_read_super(struct super_block *, void *,int);
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struct super_block *autofs_read_super(struct super_block *, void *,int);
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/* Queue management functions */
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/* Queue management functions */
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int autofs_wait(struct autofs_sb_info *,autofs_hash_t,const char *,int);
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int autofs_wait(struct autofs_sb_info *,autofs_hash_t,const char *,int);
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int autofs_wait_release(struct autofs_sb_info *,unsigned long,int);
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int autofs_wait_release(struct autofs_sb_info *,unsigned long,int);
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void autofs_catatonic_mode(struct autofs_sb_info *);
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void autofs_catatonic_mode(struct autofs_sb_info *);
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#ifdef DEBUG
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#ifdef DEBUG
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void autofs_say(const char *name, int len);
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void autofs_say(const char *name, int len);
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#else
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#else
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#define autofs_say(n,l)
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#define autofs_say(n,l)
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#endif
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#endif
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