NetBSD/sys/fs/nilfs/nilfs.h

229 lines
6.8 KiB
C

/* $NetBSD: nilfs.h,v 1.5 2014/10/15 09:05:46 hannken Exp $ */
/*
* Copyright (c) 2008, 2009 Reinoud Zandijk
* All rights reserved.
*
* 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 _FS_NILFS_NILFS_H_
#define _FS_NILFS_NILFS_H_
#include <sys/queue.h>
#include <sys/uio.h>
#include <sys/mutex.h>
#include <sys/bufq.h>
#include <sys/disk.h>
#include <sys/kthread.h>
#include <miscfs/genfs/genfs_node.h>
#include "nilfs_fs.h"
/* debug categories */
#define NILFS_DEBUG_VOLUMES 0x000001
#define NILFS_DEBUG_VFSCALL 0x000002
#define NILFS_DEBUG_CALL 0x000004
#define NILFS_DEBUG_LOCKING 0x000008
#define NILFS_DEBUG_NODE 0x000010
#define NILFS_DEBUG_LOOKUP 0x000020
#define NILFS_DEBUG_READDIR 0x000040
#define NILFS_DEBUG_TRANSLATE 0x000080
#define NILFS_DEBUG_STRATEGY 0x000100
#define NILFS_DEBUG_READ 0x000200
#define NILFS_DEBUG_WRITE 0x000400
#define NILFS_DEBUG_ATTR 0x001000
#define NILFS_DEBUG_EXTATTR 0x002000
#define NILFS_DEBUG_ALLOC 0x004000
#define NILFS_DEBUG_DIRHASH 0x010000
#define NILFS_DEBUG_NOTIMPL 0x020000
#define NILFS_DEBUG_SHEDULE 0x040000
#define NILFS_DEBUG_SYNC 0x100000
#define NILFS_DEBUG_PARANOIA 0x200000
extern int nilfs_verbose;
/* initial value of nilfs_verbose */
#define NILFS_DEBUGGING 0
#ifdef NILFS_DEBUG
#define DPRINTF(name, arg) { \
if (nilfs_verbose & NILFS_DEBUG_##name) {\
printf arg;\
};\
}
#define DPRINTFIF(name, cond, arg) { \
if (nilfs_verbose & NILFS_DEBUG_##name) { \
if (cond) printf arg;\
};\
}
#else
#define DPRINTF(name, arg) {}
#define DPRINTFIF(name, cond, arg) {}
#endif
/* Configuration values */
#define NILFS_INODE_HASHBITS 10
#define NILFS_INODE_HASHSIZE (1<<NILFS_INODE_HASHBITS)
#define NILFS_INODE_HASHMASK (NILFS_INODE_HASHSIZE - 1)
/* readdir cookies */
#define NILFS_DIRCOOKIE_DOT 1
/* handies */
#define VFSTONILFS(mp) ((struct nilfs_mount *)mp->mnt_data)
/* malloc pools */
MALLOC_DECLARE(M_NILFSMNT);
MALLOC_DECLARE(M_NILFSTEMP);
extern struct pool nilfs_node_pool;
struct nilfs_node;
struct nilfs_mount;
#define NILFS_MAXNAMLEN 255
/* structure and derivatives */
struct nilfs_mdt {
uint32_t entries_per_block;
uint32_t entries_per_group;
uint32_t blocks_per_group;
uint32_t groups_per_desc_block; /* desc is super group */
uint32_t blocks_per_desc_block; /* desc is super group */
};
/* all that is related to the nilfs itself */
struct nilfs_device {
/* device info */
struct vnode *devvp;
struct mount *vfs_mountp;
int refcnt;
/* meta : super block etc. */
uint64_t devsize;
uint32_t blocksize;
struct nilfs_super_block super, super2;
struct nilfs_node *dat_node;
struct nilfs_node *cp_node;
struct nilfs_node *su_node;
/* segment usage */
/* checkpoints */
/* dat structure and derivatives */
struct nilfs_mdt dat_mdt;
struct nilfs_mdt ifile_mdt;
/* running values */
int mount_state; /* ? */
uint64_t last_seg_seq; /* current segment sequence number */
uint64_t last_seg_num; /* last segment */
uint64_t next_seg_num; /* next segment to fill */
uint64_t last_cno; /* current checkpoint number */
struct nilfs_segment_summary last_segsum;
struct nilfs_super_root super_root;
/* syncing and late allocation */
int syncing; /* are we syncing? */
/* XXX sync_cv on what mutex? */
kcondvar_t sync_cv; /* sleeping on sync */
uint32_t uncomitted_bl; /* for free space */
/* lists */
STAILQ_HEAD(nilfs_mnts, nilfs_mount) mounts;
SLIST_ENTRY(nilfs_device) next_device;
};
extern SLIST_HEAD(_nilfs_devices, nilfs_device) nilfs_devices;
/* a specific mountpoint; head or a checkpoint/snapshot */
struct nilfs_mount {
struct mount *vfs_mountp;
struct nilfs_device *nilfsdev;
struct nilfs_args mount_args; /* flags RO access */
/* instance values */
struct nilfs_node *ifile_node;
/* lists */
STAILQ_ENTRY(nilfs_mount) next_mount; /* in nilfs_device */
};
/*
* NILFS node describing a file/directory.
*
* BUGALERT claim node_mutex before reading/writing to prevent inconsistencies !
*/
struct nilfs_node {
struct genfs_node i_gnode; /* has to be first */
struct vnode *vnode; /* vnode associated */
struct nilfs_mount *ump;
struct nilfs_device *nilfsdev;
ino_t ino;
struct nilfs_inode inode; /* readin copy */
struct dirhash *dir_hash; /* if VDIR */
/* XXX do we need this lock? */
kmutex_t node_mutex;
kcondvar_t node_lock; /* sleeping lock */
char const *lock_fname;
int lock_lineno;
/* misc */
uint32_t i_flags; /* associated flags */
struct lockf *lockf; /* lock list */
LIST_ENTRY(nilfs_node) hashchain; /* inside hash line */
};
/* misc. flags stored in i_flags (XXX needs cleaning up) */
#define IN_ACCESS 0x0001 /* Inode access time update request */
#define IN_CHANGE 0x0002 /* Inode change time update request */
#define IN_UPDATE 0x0004 /* Inode was written to; update mtime*/
#define IN_MODIFY 0x0008 /* Modification time update request */
#define IN_MODIFIED 0x0010 /* node has been modified */
#define IN_ACCESSED 0x0020 /* node has been accessed */
#define IN_RENAME 0x0040 /* node is being renamed. XXX ?? */
#define IN_DELETED 0x0080 /* node is unlinked, no FID reference*/
#define IN_LOCKED 0x0100 /* node is locked by condvar */
#define IN_SYNCED 0x0200 /* node is being used by sync */
#define IN_CALLBACK_ULK 0x0400 /* node will be unlocked by callback */
#define IN_NODE_REBUILD 0x0800 /* node is rebuild */
#define IN_FLAGBITS \
"\10\1IN_ACCESS\2IN_CHANGE\3IN_UPDATE\4IN_MODIFY\5IN_MODIFIED" \
"\6IN_ACCESSED\7IN_RENAME\10IN_DELETED\11IN_LOCKED\12IN_SYNCED" \
"\13IN_CALLBACK_ULK\14IN_NODE_REBUILD"
#endif /* !_FS_NILFS_NILFS_H_ */