diff options
Diffstat (limited to 'include/linux/jffs.h')
| -rw-r--r-- | include/linux/jffs.h | 42 |
1 files changed, 29 insertions, 13 deletions
diff --git a/include/linux/jffs.h b/include/linux/jffs.h index 07621e2d5..61e7b66fe 100644 --- a/include/linux/jffs.h +++ b/include/linux/jffs.h @@ -1,14 +1,16 @@ /* * JFFS -- Journalling Flash File System, Linux implementation. * - * Copyright (C) 1999, 2000 Finn Hakansson, Axis Communications, Inc. + * 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 1.5 2000/06/13 14:22:48 alex Exp $ + * $Id: jffs.h,v 1.11 2000/08/04 12:46:34 dwmw2 Exp $ * * Ported to Linux 2.3.x and MTD: * Copyright (C) 2000 Alexander Larsson (alex@cendio.se), Cendio Systems AB @@ -59,9 +61,6 @@ #define JFFS_MODIFY_DATA 0x04 #define JFFS_MODIFY_EXIST 0x08 -/* Using the garbage collection mechanism. */ -#define USE_GC - struct jffs_control; /* The JFFS raw inode structure: Used for storage on physical media. */ @@ -87,7 +86,7 @@ struct jffs_raw_inode __u8 nsize; /* Name length. */ __u8 nlink; /* Number of links. */ __u8 spare : 6; /* For future use. */ - __u8 rename : 1; /* Is this a special rename? */ + __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 */ __u8 accurate; /* The inode is obsolete if accurate == 0.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. */ @@ -161,17 +160,34 @@ struct jffs_file }; +/* 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 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 semaphore gc_thread_sem; /* GC thread exit mutex */ + __u32 gc_minfree_threshold; /* GC trigger thresholds */ + __u32 gc_maxdirty_threshold; }; |