http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/linux/ext3_fs_i.h

/* * linux/include/linux/ext3_fs_i.h * * Copyright (C) 1992, 1993, 1994, 1995 * Remy Card (card@masi.ibp.fr) * Laboratoire MASI - Institut Blaise Pascal * Universite Pierre et Marie Curie (Paris VI) * * from * * linux/include/linux/minix_fs_i.h * * Copyright (C) 1991, 1992 Linus Torvalds */ #ifndef _LINUX_EXT3_FS_I #define _LINUX_EXT3_FS_I #include <linux/rwsem.h> #include <linux/rbtree.h> #include <linux/seqlock.h> struct ext3_reserve_window { __u32 _rsv_start; /* First byte reserved */ __u32 _rsv_end; /* Last byte reserved or 0 */ }; struct ext3_reserve_window_node { struct rb_node rsv_node; __u32 rsv_goal_size; __u32 rsv_alloc_hit; struct ext3_reserve_window rsv_window; }; struct ext3_block_alloc_info { /* information about reservation window */ struct ext3_reserve_window_node rsv_window_node; /* * was i_next_alloc_block in ext3_inode_info * is the logical (file-relative) number of the * most-recently-allocated block in this file. * We use this for detecting linearly ascending allocation requests. */ __u32 last_alloc_logical_block; /* * Was i_next_alloc_goal in ext3_inode_info * is the *physical* companion to i_next_alloc_block. * it the the physical block number of the block which was most-recentl * allocated to this file. This give us the goal (target) for the next * allocation when we detect linearly ascending requests. */ __u32 last_alloc_physical_block; }; #define rsv_start rsv_window._rsv_start #define rsv_end rsv_window._rsv_end /* * third extended file system inode data in memory */ struct ext3_inode_info { __le32 i_data[15]; /* unconverted */ __u32 i_flags; #ifdef EXT3_FRAGMENTS __u32 i_faddr; __u8 i_frag_no; __u8 i_frag_size; #endif __u32 i_file_acl; __u32 i_dir_acl; __u32 i_dtime; /* * i_block_group is the number of the block group which contains * this file's inode. Constant across the lifetime of the inode, * it is ued for making block allocation decisions - we try to * place a file's data blocks near its inode block, and new inodes * near to their parent directory's inode. */ __u32 i_block_group; __u32 i_state; /* Dynamic state flags for ext3 */ /* block reservation info */ struct ext3_block_alloc_info *i_block_alloc_info; __u32 i_dir_start_lookup; #ifdef CONFIG_EXT3_FS_XATTR /* * Extended attributes can be read independently of the main file * data. Taking i_mutex even when reading would cause contention * between readers of EAs and writers of regular file data, so * instead we synchronize on xattr_sem when reading or changing * EAs. */ struct rw_semaphore xattr_sem; #endif #ifdef CONFIG_EXT3_FS_POSIX_ACL struct posix_acl *i_acl; struct posix_acl *i_default_acl; #endif struct list_head i_orphan; /* unlinked but open inodes */ /* * i_disksize keeps track of what the inode size is ON DISK, not * in memory. During truncate, i_size is set to the new size by * the VFS prior to calling ext3_truncate(), but the filesystem won't * set i_disksize to 0 until the truncate is actually under way. * * The intent is that i_disksize always represents the blocks which * are used by this file. This allows recovery to restart truncate * on orphans if we crash during truncate. We actually write i_disksize * into the on-disk inode when writing inodes out, instead of i_size. * * The only time when i_disksize and i_size may be different is when * a truncate is in progress. The only things which change i_disksize * are ext3_get_block (growth) and ext3_truncate (shrinkth). */ loff_t i_disksize; /* on-disk additional length */ __u16 i_extra_isize; /* * truncate_sem is for serialising ext3_truncate() against * ext3_getblock(). In the 2.4 ext2 design, great chunks of inode's * data tree are chopped off during truncate. We can't do that in * ext3 because whenever we perform intermediate commits during * truncate, the inode and all the metadata blocks *must* be in a * consistent state which allows truncation of the orphans to restart * during recovery. Hence we must fix the get_block-vs-truncate race * by other means, so we have truncate_sem. */ struct semaphore truncate_sem; struct inode vfs_inode; }; #endif /* _LINUX_EXT3_FS_I */