Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 224 insertions, 0 deletions

diff --git a/include/linux/jffs.h b/include/linux/jffs.h
new file mode 100644
index 000000000000..92213215277f
--- /dev/null
+++ b/include/linux/jffs.h
@@ -0,0 +1,224 @@
+/*
+ * JFFS -- Journalling Flash File System, Linux implementation.
+ *
+ * Copyright (C) 1999, 2000  Axis Communications AB.
+ *
+ * Created by Finn Hakansson <finn@axis.com>.
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * $Id: jffs.h,v 1.20 2001/09/18 21:33:37 dwmw2 Exp $
+ *
+ * Ported to Linux 2.3.x and MTD:
+ * Copyright (C) 2000  Alexander Larsson (alex@cendio.se), Cendio Systems AB
+ *
+ */
+
+#ifndef __LINUX_JFFS_H__
+#define __LINUX_JFFS_H__
+
+#include <linux/types.h>
+#include <linux/completion.h>
+
+#define JFFS_VERSION_STRING "1.0"
+
+/* This is a magic number that is used as an identification number for
+   this file system.  It is written to the super_block structure.  */
+#define JFFS_MAGIC_SB_BITMASK 0x07c0  /* 1984 */
+
+/* This is a magic number that every on-flash raw inode begins with.  */
+#define JFFS_MAGIC_BITMASK 0x34383931 /* "1984" */
+
+/* These two bitmasks are the valid ones for the flash memories we have
+   for the moment.  */
+#define JFFS_EMPTY_BITMASK 0xffffffff
+#define JFFS_DIRTY_BITMASK 0x00000000
+
+/* This is the inode number of the root node.  */
+#define JFFS_MIN_INO 1
+
+/* How many slots in the file hash table should we have?  */
+#define JFFS_HASH_SIZE 40
+
+/* Don't use more than 254 bytes as the maximum allowed length of a file's
+   name due to errors that could occur during the scanning of the flash
+   memory. In fact, a name length of 255 or 0xff, could be the result of
+   an uncompleted write.  For instance, if a raw inode is written to the
+   flash memory and there is a power lossage just before the length of
+   the name is written, the length 255 would be interpreted as an illegal
+   value.  */
+#define JFFS_MAX_NAME_LEN 254
+
+/* Commands for ioctl().  */
+#define JFFS_IOCTL_MAGIC 't'
+#define JFFS_PRINT_HASH _IO(JFFS_IOCTL_MAGIC, 90)
+#define JFFS_PRINT_TREE _IO(JFFS_IOCTL_MAGIC, 91)
+#define JFFS_GET_STATUS _IO(JFFS_IOCTL_MAGIC, 92)
+
+/* XXX: This is something that we should try to get rid of in the future.  */
+#define JFFS_MODIFY_INODE 0x01
+#define JFFS_MODIFY_NAME  0x02
+#define JFFS_MODIFY_DATA  0x04
+#define JFFS_MODIFY_EXIST 0x08
+
+struct jffs_control;
+
+/* The JFFS raw inode structure: Used for storage on physical media.  */
+/* Perhaps the uid, gid, atime, mtime and ctime members should have
+   more space due to future changes in the Linux kernel. Anyhow, since
+   a user of this filesystem probably have to fix a large number of
+   other things, we have decided to not be forward compatible.  */
+struct jffs_raw_inode
+{
+        __u32 magic;      /* A constant magic number.  */
+        __u32 ino;        /* Inode number.  */
+        __u32 pino;       /* Parent's inode number.  */
+        __u32 version;    /* Version number.  */
+        __u32 mode;       /* The file's type or mode.  */
+        __u16 uid;        /* The file's owner.  */
+        __u16 gid;        /* The file's group.  */
+        __u32 atime;      /* Last access time.  */
+        __u32 mtime;      /* Last modification time.  */
+        __u32 ctime;      /* Creation time.  */
+        __u32 offset;     /* Where to begin to write.  */
+        __u32 dsize;      /* Size of the node's data.  */
+        __u32 rsize;      /* How much are going to be replaced?  */
+        __u8 nsize;       /* Name length.  */
+        __u8 nlink;       /* Number of links.  */
+        __u8 spare : 6;   /* For future use.  */
+        __u8 rename : 1;  /* Rename to a name of an already existing file?  */
+        __u8 deleted : 1; /* Has this file been deleted?  */
+        __u8 accurate;    /* The inode is obsolete if accurate == 0.  */
+        __u32 dchksum;    /* Checksum for the data.  */
+        __u16 nchksum;    /* Checksum for the name.  */
+        __u16 chksum;     /* Checksum for the raw inode.  */
+};
+
+/* Define the offset of the accurate byte in struct jffs_raw_inode.  */
+#define JFFS_RAW_INODE_ACCURATE_OFFSET (sizeof(struct jffs_raw_inode) \
+                                        - 2 * sizeof(__u32) - sizeof(__u8))
+
+/* Define the offset of the chksum member in struct jffs_raw_inode.  */
+#define JFFS_RAW_INODE_CHKSUM_OFFSET (sizeof(struct jffs_raw_inode) \
+                                      - sizeof(__u16))
+
+/* Define the offset of the dchksum member in struct jffs_raw_inode.  */
+#define JFFS_RAW_INODE_DCHKSUM_OFFSET (sizeof(struct jffs_raw_inode)   \
+                                       - sizeof(__u16) - sizeof(__u16) \
+                                       - sizeof(__u32))
+
+
+/* The RAM representation of the node.  The names of pointers to
+   jffs_nodes are very often just called `n' in the source code.  */
+struct jffs_node
+{
+        __u32 ino;          /* Inode number.  */
+        __u32 version;      /* Version number.  */
+        __u32 data_offset;  /* Logic location of the data to insert.  */
+        __u32 data_size;    /* The amount of data this node inserts.  */
+        __u32 removed_size; /* The amount of data that this node removes.  */
+        __u32 fm_offset;    /* Physical location of the data in the actual
+                               flash memory data chunk.  */
+        __u8 name_size;     /* Size of the name.  */
+        struct jffs_fm *fm; /* Physical memory information.  */
+        struct jffs_node *version_prev;
+        struct jffs_node *version_next;
+        struct jffs_node *range_prev;
+        struct jffs_node *range_next;
+};
+
+
+/* The RAM representation of a file (plain files, directories,
+   links, etc.).  Pointers to jffs_files are normally named `f'
+   in the JFFS source code.  */
+struct jffs_file
+{
+        __u32 ino;    /* Inode number.  */
+        __u32 pino;   /* Parent's inode number.  */
+        __u32 mode;   /* file_type, mode  */
+        __u16 uid;    /* owner  */
+        __u16 gid;    /* group  */
+        __u32 atime;  /* Last access time.  */
+        __u32 mtime;  /* Last modification time.  */
+        __u32 ctime;  /* Creation time.  */
+        __u8 nsize;   /* Name length.  */
+        __u8 nlink;   /* Number of links.  */
+        __u8 deleted; /* Has this file been deleted?  */
+        char *name;   /* The name of this file; NULL-terminated.  */
+        __u32 size;   /* The total size of the file's data.  */
+        __u32 highest_version; /* The highest version number of this file.  */
+        struct jffs_control *c;
+        struct jffs_file *parent;   /* Reference to the parent directory.  */
+        struct jffs_file *children; /* Always NULL for plain files.  */
+        struct jffs_file *sibling_prev; /* Siblings in the same directory.  */
+        struct jffs_file *sibling_next;
+        struct list_head hash;    /* hash list.  */
+        struct jffs_node *range_head;   /* The final data.  */
+        struct jffs_node *range_tail;   /* The first data.  */
+        struct jffs_node *version_head; /* The youngest node.  */
+        struct jffs_node *version_tail; /* The oldest node.  */
+};
+
+
+/* This is just a definition of a simple list used for keeping track of
+   files deleted due to a rename.  This list is only used during the
+   mounting of the file system and only if there have been rename operations
+   earlier.  */
+struct jffs_delete_list
+{
+        __u32 ino;
+        struct jffs_delete_list *next;
+};
+
+
+/* A struct for the overall file system control.  Pointers to
+   jffs_control structs are named `c' in the source code.  */
+struct jffs_control
+{
+        struct super_block *sb;         /* Reference to the VFS super block.  */
+        struct jffs_file *root;         /* The root directory file.  */
+        struct list_head *hash;         /* Hash table for finding files by ino.  */
+        struct jffs_fmcontrol *fmc;     /* Flash memory control structure.  */
+        __u32 hash_len;                 /* The size of the hash table.  */
+        __u32 next_ino;                 /* Next inode number to use for new files.  */
+        __u16 building_fs;              /* Is the file system being built right now?  */
+        struct jffs_delete_list *delete_list; /* Track deleted files.  */
+        pid_t thread_pid;               /* GC thread's PID */
+        struct task_struct *gc_task;    /* GC task struct */
+        struct completion gc_thread_comp; /* GC thread exit mutex */
+        __u32 gc_minfree_threshold;     /* GC trigger thresholds */
+        __u32 gc_maxdirty_threshold;
+};
+
+
+/* Used to inform about flash status.  */
+struct jffs_flash_status
+{
+        __u32 size;
+        __u32 used;
+        __u32 dirty;
+        __u32 begin;
+        __u32 end;
+};
+
+/* This stuff could be used for finding memory leaks.  */
+#define JFFS_MEMORY_DEBUG 0
+
+extern long no_jffs_node;
+#if defined(JFFS_MEMORY_DEBUG) && JFFS_MEMORY_DEBUG
+extern long no_jffs_control;
+extern long no_jffs_raw_inode;
+extern long no_jffs_node_ref;
+extern long no_jffs_fm;
+extern long no_jffs_fmcontrol;
+extern long no_hash;
+extern long no_name;
+#define DJM(x) x
+#else
+#define DJM(x)
+#endif
+
+#endif /* __LINUX_JFFS_H__ */