From 1b1048c40ff0200c5d37b52a62dd6f4554fdb258 Mon Sep 17 00:00:00 2001
From: Miles Bader <miles@gnu.org>
Date: Tue, 11 Apr 1995 16:37:40 +0000
Subject: Formerly ext2fs.h.~4~

---
 ext2fs/ext2fs.h | 109 ++++++++++++++++++++++++++++++++++++++------------------
 1 file changed, 75 insertions(+), 34 deletions(-)

(limited to 'ext2fs/ext2fs.h')

diff --git a/ext2fs/ext2fs.h b/ext2fs/ext2fs.h
index 8e2e2595..17b656fc 100644
--- a/ext2fs/ext2fs.h
+++ b/ext2fs/ext2fs.h
@@ -33,6 +33,24 @@
 
 /* #undef DONT_CACHE_MEMORY_OBJECTS */
 
+struct disknode 
+{
+  ino_t number;
+
+  /* For a directory, this array holds the number of directory entries in
+     each DIRBLKSIZE piece of the directory. */
+  int *dirents;
+
+  /* Links on hash list. */
+  struct node *hnext, **hprevp;
+
+  struct rwlock allocptrlock;
+
+  struct dirty_indir *dirty;
+
+  struct user_pager_info *fileinfo;
+};  
+
 /* Identifies a particular block and where it's found
    when interpreting indirect block structure.  */
 struct iblock_spec
@@ -63,20 +81,66 @@ struct user_pager_info
   struct pager *p;
   struct user_pager_info *next, **prevp;
 };
-
-struct user_pager_info *diskpager;
-mach_port_t diskpagerport;
-off_t diskpagersize;
-
 
 /* ---------------------------------------------------------------- */
 
-vm_address_t zeroblock;
-void *disk_image;
-
-struct super_block *sblock;
-int sblock_dirty;
-int csum_dirty;
+#define BLOCK_SIZE 1024
+#define BLOCK_SIZE_BITS 10
+
+extern unsigned long inode_init(unsigned long start, unsigned long end);
+extern unsigned long file_table_init(unsigned long start, unsigned long end);
+extern unsigned long name_cache_init(unsigned long start, unsigned long end);
+
+#ifndef NULL
+#define NULL ((void *) 0)
+#endif
+
+/*
+ * These are the fs-independent mount-flags: up to 16 flags are supported
+ */
+#define MS_RDONLY	 1 /* mount read-only */
+#define MS_NOSUID	 2 /* ignore suid and sgid bits */
+#define MS_NODEV	 4 /* disallow access to device special files */
+#define MS_NOEXEC	 8 /* disallow program execution */
+#define MS_SYNCHRONOUS	16 /* writes are synced at once */
+#define MS_REMOUNT	32 /* alter flags of a mounted FS */
+
+#define S_APPEND    256 /* append-only file */
+#define S_IMMUTABLE 512 /* immutable file */
+
+/*
+ * Note that read-only etc flags are inode-specific: setting some file-system
+ * flags just means all the inodes inherit those flags by default. It might be
+ * possible to override it selectively if you really wanted to with some
+ * ioctl() that is not currently implemented.
+ *
+ * Exception: MS_RDONLY is always applied to the entire file system.
+ */
+#define IS_RDONLY(inode) (((inode)->i_sb) && ((inode)->i_sb->s_flags & MS_RDONLY))
+#define IS_APPEND(inode) ((inode)->i_flags & S_APPEND)
+#define IS_IMMUTABLE(inode) ((inode)->i_flags & S_IMMUTABLE)
+
+struct super_block
+{
+  void *s_dev;			/* actually a point to the disk image */
+  char *s_devname;
+  mach_port_t s_device_port;
+
+  struct user_pager_info *s_pager;
+  mach_port_t s_pager_port;
+  off_t s_pager_size;
+
+  spin_lock_t file_pagers_lock;
+
+  unsigned long s_blocksize;
+  struct mutex s_lock;
+  unsigned char s_dirt;
+  unsigned long s_flags;
+  unsigned long s_magic;
+  union {
+    struct ext2_sb_info ext2_sb;
+  } u;
+};
 
 /* ---------------------------------------------------------------- */
 
@@ -86,11 +150,6 @@ spin_lock_t alloclock;
 
 spin_lock_t gennumberlock;
 u_long nextgennumber;
-
-
-/* ---------------------------------------------------------------- */
-
-mach_port_t ext2fs_device;
 
 /* ---------------------------------------------------------------- */
 
@@ -115,25 +174,7 @@ enum compat_mode
 #define isset(a, i) ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
 #define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
 #define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<(i)%NBBY))
-#define fsaddr(fs,n) (fsbtodb(fs,n)*DEV_BSIZE)
 
 #define bread(void *dev, long block, long amount) \
   ((char *)(vm_addres_t)dev + block * DEV_BSIZE)
 #define brelse(char *bh) ((void)0)
-
-
-/* Functions for looking inside disk_image */
-
-/* Sync part of the disk */
-extern inline void
-sync_disk_blocks (daddr_t blkno, size_t nbytes, int wait)
-{
-  pager_sync_some (diskpager->p, fsaddr (sblock, blkno), nbytes, wait);
-}
-
-/* Sync an disk inode */
-extern inline void
-sync_dinode (int inum, int wait)
-{
-  sync_disk_blocks (ino_to_fsba (sblock, inum), sblock->fs_fsize, wait);
-}
-- 
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