fs/jffs2/jffs2_fs_i.h

   1 /*
   2  * JFFS2 -- Journalling Flash File System, Version 2.
   3  *
   4  * Copyright © 2001-2007 Red Hat, Inc.
   5  * Copyright © 2004-2010 David Woodhouse <dwmw2@infradead.org>
   6  *
   7  * Created by David Woodhouse <dwmw2@infradead.org>
   8  *
   9  * For licensing information, see the file 'LICENCE' in this directory.
  10  *
  11  */
  12
  13 #ifndef _JFFS2_FS_I
  14 #define _JFFS2_FS_I
  15
  16 #include <linux/rbtree.h>
  17 #include <linux/posix_acl.h>
  18 #include <linux/mutex.h>
  19
  20 struct jffs2_inode_info {
  21         /* We need an internal mutex similar to inode->i_mutex.
  22            Unfortunately, we can't used the existing one, because
  23            either the GC would deadlock, or we'd have to release it
  24            before letting GC proceed. Or we'd have to put ugliness
  25            into the GC code so it didn't attempt to obtain the i_mutex
  26            for the inode(s) which are already locked */
  27         struct mutex sem;
  28
  29         /* The highest (datanode) version number used for this ino */
  30         uint32_t highest_version;
  31
  32         /* List of data fragments which make up the file */
  33         struct rb_root fragtree;
  34
  35         /* There may be one datanode which isn't referenced by any of the
  36            above fragments, if it contains a metadata update but no actual
  37            data - or if this is a directory inode */
  38         /* This also holds the _only_ dnode for symlinks/device nodes,
  39            etc. */
  40         struct jffs2_full_dnode *metadata;
  41
  42         /* Directory entries */
  43         struct jffs2_full_dirent *dents;
  44
  45         /* The target path if this is the inode of a symlink */
  46         unsigned char *target;
  47
  48         /* Some stuff we just have to keep in-core at all times, for each inode. */
  49         struct jffs2_inode_cache *inocache;
  50
  51         uint16_t flags;
  52         uint8_t usercompr;
  53         struct inode vfs_inode;
  54 };
  55
  56 #endif /* _JFFS2_FS_I */