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minix/include/ufs/chfs/chfs.h
Ben Gras 2fe8fb192f Full switch to clang/ELF. Drop ack. Simplify. 
There is important information about booting non-ack images in
docs/UPDATING. ack/aout-format images can't be built any more, and
booting clang/ELF-format ones is a little different. Updating to the
new boot monitor is recommended.

Changes in this commit:

	. drop boot monitor -> allowing dropping ack support
	. facility to copy ELF boot files to /boot so that old boot monitor
	  can still boot fairly easily, see UPDATING
	. no more ack-format libraries -> single-case libraries
	. some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases
	. drop several ack toolchain commands, but not all support
	  commands (e.g. aal is gone but acksize is not yet).
	. a few libc files moved to netbsd libc dir
	. new /bin/date as minix date used code in libc/
	. test compile fix
	. harmonize includes
	. /usr/lib is no longer special: without ack, /usr/lib plays no
	  kind of special bootstrapping role any more and bootstrapping
	  is done exclusively through packages, so releases depend even
	  less on the state of the machine making them now.
	. rename nbsd_lib* to lib*
	. reduce mtree
2012-02-14 14:52:02 +01:00

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/* $NetBSD: chfs.h,v 1.4 2011/11/28 12:50:07 ahoka Exp $ */
/*-
* Copyright (c) 2010 Department of Software Engineering,
* University of Szeged, Hungary
* Copyright (C) 2009 Ferenc Havasi <havasi@inf.u-szeged.hu>
* Copyright (C) 2009 Zoltan Sogor <weth@inf.u-szeged.hu>
* Copyright (C) 2009 David Tengeri <dtengeri@inf.u-szeged.hu>
* Copyright (C) 2009 Tamas Toth <ttoth@inf.u-szeged.hu>
* Copyright (C) 2010 Adam Hoka <ahoka@NetBSD.org>
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by the Department of Software Engineering, University of Szeged, Hungary
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef __CHFS_H__
#define __CHFS_H__
#if 0
#define DBG_MSG
#define DBG_MSG_GC
#endif
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/cdefs.h>
#include <sys/stdint.h>
#include <sys/types.h>
#include <sys/tree.h>
#include <sys/queue.h>
#include <sys/kmem.h>
#include <sys/endian.h>
#include <sys/rwlock.h>
#include <sys/condvar.h>
#include <sys/mutex.h>
#include <sys/kthread.h>
#include <sys/rbtree.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/hash.h>
#include <sys/module.h>
#include <sys/dirent.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ufs/dir.h>
/* XXX shouldnt be defined here, but needed by chfs_inode.h */
TAILQ_HEAD(chfs_dirent_list, chfs_dirent);
#include "chfs_pool.h"
#include "ebh.h"
#include "media.h"
#include "chfs_inode.h"
#ifndef MOUNT_CHFS
#define MOUNT_CHFS "chfs"
#endif
#define CHFS_ROOTINO ROOTINO /* ROOTINO == 2 */
enum {
VNO_STATE_UNCHECKED, /* CRC checks not yet done */
VNO_STATE_CHECKING, /* CRC checks in progress */
VNO_STATE_PRESENT, /* In core */
VNO_STATE_CHECKEDABSENT,/* Checked, cleared again */
VNO_STATE_GC, /* GCing a 'pristine' node */
VNO_STATE_READING, /* In read_inode() */
VNO_STATE_CLEARING /* In clear_inode() */
};
#define VNODECACHE_SIZE 128
#define MAX_READ_FREE(chmp) (((chmp)->chm_ebh)->eb_size / 8)
/* an eraseblock will be clean if its dirty size is smaller than this */
#define MAX_DIRTY_TO_CLEAN 255
#define VERY_DIRTY(chmp, size) ((size) >= (((chmp)->chm_ebh)->eb_size / 2))
#define CHFS_PAD(x) (((x)+3)&~3)
enum {
CHFS_NODE_OK = 0,
CHFS_NODE_BADMAGIC,
CHFS_NODE_BADCRC,
CHFS_NODE_BADNAMECRC
};
enum {
CHFS_BLK_STATE_FREE = 100,
CHFS_BLK_STATE_CLEAN,
CHFS_BLK_STATE_PARTDIRTY,
CHFS_BLK_STATE_ALLDIRTY
};
extern struct pool chfs_inode_pool;
extern const struct genfs_ops chfs_genfsops;
/**
* struct chfs_node_ref - a reference to a node
* @lnr: logical identifier of the eraseblock where the node is
* @offset: offset int hte eraseblock where the node starts
* @next: used at data and dirent nodes, it points to the next data node which
* belongs to the same vnode
*/
struct chfs_node_ref
{
struct chfs_node_ref *nref_next;
uint32_t nref_lnr;
uint32_t nref_offset;
};
/* Constants for allocating node refs */
#define REFS_BLOCK_LEN (255/sizeof(struct chfs_node_ref))
#define REF_EMPTY_NODE (UINT_MAX)
#define REF_LINK_TO_NEXT (UINT_MAX - 1)
enum {
CHFS_NORMAL_NODE_MASK,
CHFS_UNCHECKED_NODE_MASK,
CHFS_OBSOLETE_NODE_MASK,
CHFS_PRISTINE_NODE_MASK
};
#define CHFS_REF_FLAGS(ref) ((ref)->nref_offset & 3)
#define CHFS_REF_OBSOLETE(ref) (((ref)->nref_offset & 3) == CHFS_OBSOLETE_NODE_MASK)
#define CHFS_MARK_REF_NORMAL(ref) \
do { \
(ref)->nref_offset = CHFS_GET_OFS((ref)->nref_offset) | CHFS_NORMAL_NODE_MASK; \
} while(0)
#define CHFS_GET_OFS(ofs) (ofs & ~ 3)
static inline struct chfs_node_ref *
node_next(struct chfs_node_ref *nref)
{
//dbg("node next: %u : %u\n", nref->nref_lnr, nref->nref_offset);
nref++;
//dbg("nref++: %u : %u\n", nref->nref_lnr, nref->nref_offset);
if (nref->nref_lnr == REF_LINK_TO_NEXT) {
//dbg("link to next\n");
nref = nref->nref_next;
if (!nref)
return nref;
}
if (nref->nref_lnr == REF_EMPTY_NODE) {
//dbg("empty\n");
return NULL;
}
return nref;
}
/**
* struct chfs_dirent - full representation of a directory entry
*/
struct chfs_dirent
{
struct chfs_node_ref *nref;
// struct chfs_dirent *next;
TAILQ_ENTRY(chfs_dirent) fds;
uint64_t version;
ino_t vno;
uint32_t nhash;
enum vtype type;
uint8_t nsize;
uint8_t name[0];
/* used by chfs_alloc_dirent and free counterpart */
// size_t alloc_size;
};
struct chfs_tmp_dnode {
struct chfs_full_dnode *node;
uint64_t version;
uint32_t data_crc;
//uint32_t partial_crc;
//uint16_t csize;
uint16_t overlapped;
struct chfs_tmp_dnode *next;
};
struct chfs_tmp_dnode_info {
struct rb_node rb_node;
struct chfs_tmp_dnode *tmpnode;
};
struct chfs_readinode_info {
struct rb_tree tdi_root;
struct chfs_tmp_dnode_info *mdata_tn;
uint64_t highest_version;
struct chfs_node_ref *latest_ref;
};
struct chfs_full_dnode {
struct chfs_node_ref *nref;
uint64_t ofs;
uint32_t size;
uint32_t frags;
};
struct chfs_node_frag {
struct rb_node rb_node;
struct chfs_full_dnode *node;
uint32_t size;
uint64_t ofs;
};
static inline struct chfs_node_frag *
frag_first(struct rb_tree *tree)
{
struct chfs_node_frag *frag;
frag = (struct chfs_node_frag *)RB_TREE_MIN(tree);
return frag;
}
static inline struct chfs_node_frag *
frag_last(struct rb_tree *tree)
{
struct chfs_node_frag *frag;
frag = (struct chfs_node_frag *)RB_TREE_MAX(tree);
return frag;
}
#define frag_next(tree, frag) (struct chfs_node_frag *)rb_tree_iterate(tree, frag, RB_DIR_RIGHT)
#define frag_prev(tree, frag) (struct chfs_node_frag *)rb_tree_iterate(tree, frag, RB_DIR_LEFT)
/* XXX hack
#ifndef CHFS_FRAG_TREE
#define CHFS_FRAG_TREE
RB_HEAD(chfs_frag_tree, chfs_node_frag);
#endif
*/
/* for prototypes, properly defined in chfs_inode.h */
//struct chfs_inode_ext;
/**
* struct chfs_vnode_cache - in memory representation of a vnode
* @v: pointer to the vnode info node
* @dnode: pointer to the list of data nodes
* @dirents: pointer to the list of directory entries
* @vno_version: used only during scan, holds the current version number of
* chfs_flash_vnode
* @scan_dirents: used only during scan, holds the full representation of
* directory entries of this vnode
* @pvno: parent vnode number
* @nlink: number of links to this vnode
*/
struct chfs_vnode_cache {
// struct chfs_dirent *scan_dirents;
void *p;
struct chfs_dirent_list scan_dirents;
struct chfs_node_ref *v;
struct chfs_node_ref *dnode;
struct chfs_node_ref *dirents;
uint64_t *vno_version;
uint64_t highest_version;
uint8_t flags;
uint16_t state;
ino_t vno;
ino_t pvno;
struct chfs_vnode_cache* next;
uint32_t nlink;
};
struct chfs_eraseblock
{
uint32_t lnr;
TAILQ_ENTRY(chfs_eraseblock) queue;
//uint32_t bad_count;
uint32_t unchecked_size;
uint32_t used_size;
uint32_t dirty_size;
uint32_t free_size;
uint32_t wasted_size;
struct chfs_node_ref *first_node;
struct chfs_node_ref *last_node;
/* Next block to be garbage collected */
struct chfs_node_ref *gc_node;
};
TAILQ_HEAD(chfs_eraseblock_queue, chfs_eraseblock);
#define ALLOC_NORMAL 0
#define ALLOC_DELETION 1
#define ALLOC_GC 2
struct garbage_collector_thread {
lwp_t *gcth_thread;
kcondvar_t gcth_wakeup;
bool gcth_running;
};
#define CHFS_MP_FLAG_SCANNING 2
#define CHFS_MP_FLAG_BUILDING 4
/**
* struct chfs_mount - CHFS main descriptor structure
* @ebh: eraseblock handler
* @fl_index: index of flash device in the flash layer
* @fs_version: filesystem version descriptor
* @gbl_version: global version number
* @max_vno: max vnode id
* @chm_lock_mountfields:
* @vnocache_hash: hash table of vnode caches
* @vnocache_lock:
* @blocks: array of eraseblocks on flash
* @chm_root: used to protect all fields
* @free_size: free size on the flash
* @dirty_size: dirtied size on flash
* @unchecked_size: size of unchecked data on flash
* @free_queue: queue of free eraseblocks
* @clean_queue: queue of clean eraseblocks
* @dirty_queue: queue of dirty eraseblocks
* @very_dirty_queue: queue of very dirty eraseblocks
* @erase_pending_queue: queue of eraseblocks waiting for erasing
* @erasable_pending_wbuf_queue: queue of eraseblocks waiting for erasing and
* have data to write to them
* @nextblock: next eraseblock to write to
* @nr_free_blocks: number of free blocks on the free_queue
* @nr_erasable_blocks: number of blocks that can be erased and are on the
* erasable_queue
*/
struct chfs_mount {
struct mount *chm_fsmp;
struct chfs_ebh *chm_ebh;
int chm_fs_version;
uint64_t chm_gbl_version;
ino_t chm_max_vno;
ino_t chm_checked_vno;
unsigned int chm_flags;
/* chm_lock_mountfields:
* Used to protect all the following fields. */
kmutex_t chm_lock_mountfields;
struct chfs_vnode_cache **chm_vnocache_hash;
/* chm_lock_vnocache:
* Used to protect the vnode cache.
* If you have to lock chm_lock_mountfields and also chm_lock_vnocache,
* you must lock chm_lock_mountfields first. */
kmutex_t chm_lock_vnocache;
struct chfs_eraseblock *chm_blocks;
struct chfs_node *chm_root;
uint32_t chm_free_size;
uint32_t chm_dirty_size;
uint32_t chm_unchecked_size;
uint32_t chm_used_size;
uint32_t chm_wasted_size;
/* chm_lock_sizes:
* Used to protect the (free, used, etc.) sizes of the FS
* (and also the sizes of each eraseblock).
* If you have to lock chm_lock_mountfields and also chm_lock_sizes,
* you must lock chm_lock_mountfields first. */
kmutex_t chm_lock_sizes;
struct chfs_eraseblock_queue chm_free_queue;
struct chfs_eraseblock_queue chm_clean_queue;
struct chfs_eraseblock_queue chm_dirty_queue;
struct chfs_eraseblock_queue chm_very_dirty_queue;
struct chfs_eraseblock_queue chm_erasable_pending_wbuf_queue;
struct chfs_eraseblock_queue chm_erase_pending_queue;
uint8_t chm_resv_blocks_deletion;
uint8_t chm_resv_blocks_write;
uint8_t chm_resv_blocks_gctrigger;
uint8_t chm_resv_blocks_gcmerge;
uint8_t chm_nospc_dirty;
uint8_t chm_vdirty_blocks_gctrigger;
struct chfs_eraseblock *chm_nextblock;
struct garbage_collector_thread chm_gc_thread;
struct chfs_eraseblock *chm_gcblock;
int chm_nr_free_blocks;
int chm_nr_erasable_blocks;
int32_t chm_fs_bmask;
int32_t chm_fs_bsize;
int32_t chm_fs_qbmask;
int32_t chm_fs_bshift;
int32_t chm_fs_fmask;
int64_t chm_fs_qfmask;
/* TODO will we use these? */
unsigned int chm_pages_max;
unsigned int chm_pages_used;
unsigned int chm_nodes_max;
unsigned int chm_nodes_cnt;
struct chfs_pool chm_dirent_pool;
struct chfs_pool chm_node_pool;
struct chfs_str_pool chm_str_pool;
/**/
size_t chm_wbuf_pagesize;
unsigned char* chm_wbuf;
size_t chm_wbuf_ofs;
size_t chm_wbuf_len;
/* chm_lock_wbuf:
* Used to protect the write buffer.
* If you have to lock chm_lock_mountfields and also chm_lock_wbuf,
* you must lock chm_lock_mountfields first. */
krwlock_t chm_lock_wbuf;
};
/*
* TODO we should move here all of these from the bottom of the file
* Macros/functions to convert from generic data structures to chfs
* specific ones.
*/
#define CHFS_OFFSET_DOT 0
#define CHFS_OFFSET_DOTDOT 1
#define CHFS_OFFSET_EOF 2
#define CHFS_OFFSET_FIRST 3
/*---------------------------------------------------------------------------*/
/* chfs_build.c */
void chfs_calc_trigger_levels(struct chfs_mount *);
int chfs_build_filesystem(struct chfs_mount *);
void chfs_build_set_vnodecache_nlink(struct chfs_mount *,
struct chfs_vnode_cache *);
void chfs_build_remove_unlinked_vnode(struct chfs_mount *,
struct chfs_vnode_cache *, struct chfs_dirent_list *);
/* chfs_scan.c */
int chfs_scan_eraseblock(struct chfs_mount *, struct chfs_eraseblock *);
struct chfs_vnode_cache *chfs_scan_make_vnode_cache(struct chfs_mount *,
ino_t);
int chfs_scan_check_node_hdr(struct chfs_flash_node_hdr *);
int chfs_scan_check_vnode(struct chfs_mount *,
struct chfs_eraseblock *, void *, off_t);
int chfs_scan_mark_dirent_obsolete(struct chfs_mount *,
struct chfs_vnode_cache *, struct chfs_dirent *);
void chfs_add_fd_to_list(struct chfs_mount *,
struct chfs_dirent *, struct chfs_vnode_cache *);
int chfs_scan_check_dirent_node(struct chfs_mount *,
struct chfs_eraseblock *, void *, off_t);
int chfs_scan_check_data_node(struct chfs_mount *,
struct chfs_eraseblock *, void *, off_t);
int chfs_scan_classify_cheb(struct chfs_mount *,
struct chfs_eraseblock *);
/* chfs_nodeops.c */
int chfs_update_eb_dirty(struct chfs_mount *,
struct chfs_eraseblock *, uint32_t);
void chfs_add_node_to_list(struct chfs_mount *, struct chfs_vnode_cache *,
struct chfs_node_ref *, struct chfs_node_ref **);
void chfs_add_fd_to_inode(struct chfs_mount *,
struct chfs_inode *, struct chfs_dirent *);
void chfs_add_vnode_ref_to_vc(struct chfs_mount *, struct chfs_vnode_cache *,
struct chfs_node_ref *);
struct chfs_node_ref* chfs_nref_next(struct chfs_node_ref *);
int chfs_nref_len(struct chfs_mount *,
struct chfs_eraseblock *, struct chfs_node_ref *);
int chfs_close_eraseblock(struct chfs_mount *,
struct chfs_eraseblock *);
int chfs_reserve_space_normal(struct chfs_mount *, uint32_t, int);
int chfs_reserve_space_gc(struct chfs_mount *, uint32_t);
int chfs_reserve_space(struct chfs_mount *, uint32_t);
void chfs_mark_node_obsolete(struct chfs_mount *, struct chfs_node_ref *);
static inline struct chfs_vnode_cache *
chfs_nref_to_vc(struct chfs_node_ref *nref)
{
while (nref->nref_next) {
nref = nref->nref_next;
//dbg("lnr: %u, ofs: %u\n", nref->nref_lnr, nref->nref_offset);
//dbg("vno: %llu\n", ((struct chfs_vnode_cache *)(nref))->vno);
//dbg("scan_dirents: %p\n", ((struct chfs_vnode_cache *)(nref))->scan_dirents);
if (nref->nref_lnr == REF_LINK_TO_NEXT) {
dbg("Link to next!\n");
} else if (nref->nref_lnr == REF_EMPTY_NODE) {
dbg("Empty!\n");
}
}
//dbg("vno: %llu\n", ((struct chfs_vnode_cache *)(nref))->vno);
//dbg("NREF_TO_VC: GET IT\n");
//dbg("nref_next: %p, lnr: %u, ofs: %u\n", nref->nref_next, nref->nref_lnr, nref->nref_offset);
struct chfs_vnode_cache *vc = (struct chfs_vnode_cache *) nref;
dbg("vno: %ju, pvno: %ju, hv: %ju, nlink: %u\n", (intmax_t )vc->vno,
(intmax_t )vc->pvno, (intmax_t )vc->highest_version, vc->nlink);
//return ((struct chfs_vnode_cache *)nref);
return vc;
}
/* chfs_malloc.c */
int chfs_alloc_pool_caches(void);
void chfs_destroy_pool_caches(void);
struct chfs_vnode_cache* chfs_vnode_cache_alloc(ino_t);
void chfs_vnode_cache_free(struct chfs_vnode_cache *);
struct chfs_node_ref* chfs_alloc_node_ref(
struct chfs_eraseblock *);
void chfs_free_node_refs(struct chfs_eraseblock *);
struct chfs_dirent* chfs_alloc_dirent(int);
void chfs_free_dirent(struct chfs_dirent *);
struct chfs_flash_vnode* chfs_alloc_flash_vnode(void);
void chfs_free_flash_vnode(struct chfs_flash_vnode *);
struct chfs_flash_dirent_node* chfs_alloc_flash_dirent(void);
void chfs_free_flash_dirent(struct chfs_flash_dirent_node *);
struct chfs_flash_data_node* chfs_alloc_flash_dnode(void);
void chfs_free_flash_dnode(struct chfs_flash_data_node *);
struct chfs_node_frag* chfs_alloc_node_frag(void);
void chfs_free_node_frag(struct chfs_node_frag *);
struct chfs_node_ref* chfs_alloc_refblock(void);
void chfs_free_refblock(struct chfs_node_ref *);
struct chfs_full_dnode* chfs_alloc_full_dnode(void);
void chfs_free_full_dnode(struct chfs_full_dnode *);
struct chfs_tmp_dnode * chfs_alloc_tmp_dnode(void);
void chfs_free_tmp_dnode(struct chfs_tmp_dnode *);
struct chfs_tmp_dnode_info * chfs_alloc_tmp_dnode_info(void);
void chfs_free_tmp_dnode_info(struct chfs_tmp_dnode_info *);
/* chfs_readinode.c */
int chfs_read_inode(struct chfs_mount *, struct chfs_inode *);
int chfs_read_inode_internal(struct chfs_mount *, struct chfs_inode *);
void chfs_kill_fragtree(struct rb_tree *);
uint32_t chfs_truncate_fragtree(struct chfs_mount *,
struct rb_tree *, uint32_t);
int chfs_add_full_dnode_to_inode(struct chfs_mount *,
struct chfs_inode *,
struct chfs_full_dnode *);
int chfs_read_data(struct chfs_mount*, struct vnode *,
struct buf *);
/* chfs_erase.c */
int chfs_remap_leb(struct chfs_mount *);
/* chfs_ihash.c */
void chfs_ihashinit(void);
void chfs_ihashreinit(void);
void chfs_ihashdone(void);
struct vnode *chfs_ihashlookup(dev_t, ino_t);
struct vnode *chfs_ihashget(dev_t, ino_t, int);
void chfs_ihashins(struct chfs_inode *);
void chfs_ihashrem(struct chfs_inode *);
extern kmutex_t chfs_ihash_lock;
extern kmutex_t chfs_hashlock;
/* chfs_gc.c */
void chfs_gc_trigger(struct chfs_mount *);
int chfs_gc_thread_should_wake(struct chfs_mount *);
void chfs_gc_thread(void *);
void chfs_gc_thread_start(struct chfs_mount *);
void chfs_gc_thread_stop(struct chfs_mount *);
int chfs_gcollect_pass(struct chfs_mount *);
/* chfs_vfsops.c*/
int chfs_gop_alloc(struct vnode *, off_t, off_t, int, kauth_cred_t);
int chfs_mountfs(struct vnode *, struct mount *);
/* chfs_vnops.c */
extern int (**chfs_vnodeop_p)(void *);
extern int (**chfs_specop_p)(void *);
extern int (**chfs_fifoop_p)(void *);
int chfs_lookup(void *);
int chfs_create(void *);
int chfs_mknod(void *);
int chfs_open(void *);
int chfs_close(void *);
int chfs_access(void *);
int chfs_getattr(void *);
int chfs_setattr(void *);
int chfs_chown(struct vnode *, uid_t, gid_t, kauth_cred_t);
int chfs_chmod(struct vnode *, int, kauth_cred_t);
int chfs_read(void *);
int chfs_write(void *);
int chfs_fsync(void *);
int chfs_remove(void *);
int chfs_link(void *);
int chfs_rename(void *);
int chfs_mkdir(void *);
int chfs_rmdir(void *);
int chfs_symlink(void *);
int chfs_readdir(void *);
int chfs_readlink(void *);
int chfs_inactive(void *);
int chfs_reclaim(void *);
int chfs_advlock(void *);
int chfs_strategy(void *);
int chfs_bmap(void *);
/* chfs_vnode.c */
struct vnode *chfs_vnode_lookup(struct chfs_mount *, ino_t);
int chfs_readvnode(struct mount *, ino_t, struct vnode **);
int chfs_readdirent(struct mount *, struct chfs_node_ref *,
struct chfs_inode *);
int chfs_makeinode(int, struct vnode *, struct vnode **,
struct componentname *, int );
void chfs_set_vnode_size(struct vnode *, size_t);
void chfs_change_size_free(struct chfs_mount *,
struct chfs_eraseblock *, int);
void chfs_change_size_dirty(struct chfs_mount *,
struct chfs_eraseblock *, int);
void chfs_change_size_unchecked(struct chfs_mount *,
struct chfs_eraseblock *, int);
void chfs_change_size_used(struct chfs_mount *,
struct chfs_eraseblock *, int);
void chfs_change_size_wasted(struct chfs_mount *,
struct chfs_eraseblock *, int);
/* chfs_vnode_cache.c */
struct chfs_vnode_cache **chfs_vnocache_hash_init(void);
void chfs_vnocache_hash_destroy(struct chfs_vnode_cache **);
void chfs_vnode_cache_set_state(struct chfs_mount *,
struct chfs_vnode_cache *, int);
struct chfs_vnode_cache* chfs_vnode_cache_get(struct chfs_mount *, ino_t);
void chfs_vnode_cache_add(struct chfs_mount *, struct chfs_vnode_cache *);
void chfs_vnode_cache_remove(struct chfs_mount *, struct chfs_vnode_cache *);
/* chfs_wbuf.c */
int chfs_write_wbuf(struct chfs_mount*,
const struct iovec *, long, off_t, size_t *);
int chfs_flush_pending_wbuf(struct chfs_mount *);
/* chfs_write.c */
int chfs_write_flash_vnode(struct chfs_mount *, struct chfs_inode *, int);
int chfs_write_flash_dirent(struct chfs_mount *, struct chfs_inode *,
struct chfs_inode *, struct chfs_dirent *, ino_t, int);
int chfs_write_flash_dnode(struct chfs_mount *, struct vnode *,
struct buf *, struct chfs_full_dnode *);
int chfs_do_link(struct chfs_inode *,
struct chfs_inode *, const char *, int, enum vtype);
int chfs_do_unlink(struct chfs_inode *,
struct chfs_inode *, const char *, int);
/* chfs_subr.c */
size_t chfs_mem_info(bool);
struct chfs_dirent * chfs_dir_lookup(struct chfs_inode *,
struct componentname *);
int chfs_filldir (struct uio *, ino_t, const char *, int, enum vtype);
int chfs_chsize(struct vnode *, u_quad_t, kauth_cred_t);
int chfs_chflags(struct vnode *, int, kauth_cred_t);
void chfs_itimes(struct chfs_inode *, const struct timespec *,
const struct timespec *, const struct timespec *);
int chfs_update(struct vnode *, const struct timespec *,
const struct timespec *, int);
//int chfs_truncate(struct vnode *, off_t);
/*---------------------------------------------------------------------------*/
/* Some inline functions temporarily placed here */
static inline int
chfs_map_leb(struct chfs_mount *chmp, int lnr)
{
int err;
err = ebh_map_leb(chmp->chm_ebh, lnr);
if (err)
chfs_err("unmap leb %d failed, error: %d\n",lnr, err);
return err;
}
static inline int
chfs_unmap_leb(struct chfs_mount *chmp, int lnr)
{
int err;
err = ebh_unmap_leb(chmp->chm_ebh, lnr);
if (err)
chfs_err("unmap leb %d failed, error: %d\n",lnr, err);
return err;
}
static inline int
chfs_read_leb(struct chfs_mount *chmp, int lnr, char *buf,
int offset, int len, size_t *retlen)
{
int err;
err = ebh_read_leb(chmp->chm_ebh, lnr, buf, offset, len, retlen);
if (err)
chfs_err("read leb %d:%d failed, error: %d\n",
lnr, offset, err);
return err;
}
static inline int chfs_write_leb(struct chfs_mount *chmp, int lnr, char *buf,
int offset, int len, size_t *retlen)
{
int err;
err = ebh_write_leb(chmp->chm_ebh, lnr, buf, offset, len, retlen);
if (err)
chfs_err("write leb %d:%d failed, error: %d\n",
lnr, offset, err);
return err;
}
/******************************************************************************/
/* Code from dummyfs.h */
/******************************************************************************/
/* --------------------------------------------------------------------- */
#define CHFS_PAGES_RESERVED (4 * 1024 * 1024 / PAGE_SIZE)
static __inline size_t
CHFS_PAGES_MAX(struct chfs_mount *chmp)
{
size_t freepages;
freepages = chfs_mem_info(false);
if (freepages < CHFS_PAGES_RESERVED)
freepages = 0;
else
freepages -= CHFS_PAGES_RESERVED;
return MIN(chmp->chm_pages_max, freepages + chmp->chm_pages_used);
}
#define CHFS_ITIMES(ip, acc, mod, cre) \
while ((ip)->iflag & (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY)) \
chfs_itimes(ip, acc, mod, cre)
/* used for KASSERTs */
#define IMPLIES(a, b) (!(a) || (b))
#define IFF(a, b) (IMPLIES(a, b) && IMPLIES(b, a))
#endif /* __CHFS_H__ */
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