232 lines
6.9 KiB
C
232 lines
6.9 KiB
C
/* $NetBSD: nilfs.h,v 1.1 2009/07/18 16:31:42 reinoud Exp $ */
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/*
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* Copyright (c) 2008, 2009 Reinoud Zandijk
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef _FS_NILFS_NILFS_H_
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#define _FS_NILFS_NILFS_H_
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#include <sys/queue.h>
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#include <sys/uio.h>
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#include <sys/mutex.h>
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#include <sys/bufq.h>
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#include <sys/disk.h>
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#include <sys/kthread.h>
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#include <miscfs/genfs/genfs_node.h>
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#include "nilfs_fs.h"
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/* debug categories */
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#define NILFS_DEBUG_VOLUMES 0x000001
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#define NILFS_DEBUG_VFSCALL 0x000002
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#define NILFS_DEBUG_CALL 0x000004
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#define NILFS_DEBUG_LOCKING 0x000008
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#define NILFS_DEBUG_NODE 0x000010
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#define NILFS_DEBUG_LOOKUP 0x000020
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#define NILFS_DEBUG_READDIR 0x000040
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#define NILFS_DEBUG_TRANSLATE 0x000080
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#define NILFS_DEBUG_STRATEGY 0x000100
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#define NILFS_DEBUG_READ 0x000200
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#define NILFS_DEBUG_WRITE 0x000400
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#define NILFS_DEBUG_ATTR 0x001000
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#define NILFS_DEBUG_EXTATTR 0x002000
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#define NILFS_DEBUG_ALLOC 0x004000
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#define NILFS_DEBUG_DIRHASH 0x010000
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#define NILFS_DEBUG_NOTIMPL 0x020000
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#define NILFS_DEBUG_SHEDULE 0x040000
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#define NILFS_DEBUG_SYNC 0x100000
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#define NILFS_DEBUG_PARANOIA 0x200000
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extern int nilfs_verbose;
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/* initial value of nilfs_verbose */
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#define NILFS_DEBUGGING 0
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#ifdef DEBUG
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#define DPRINTF(name, arg) { \
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if (nilfs_verbose & NILFS_DEBUG_##name) {\
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printf arg;\
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};\
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}
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#define DPRINTFIF(name, cond, arg) { \
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if (nilfs_verbose & NILFS_DEBUG_##name) { \
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if (cond) printf arg;\
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};\
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}
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#else
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#define DPRINTF(name, arg) {}
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#define DPRINTFIF(name, cond, arg) {}
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#endif
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/* Configuration values */
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#define NILFS_INODE_HASHBITS 10
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#define NILFS_INODE_HASHSIZE (1<<NILFS_INODE_HASHBITS)
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#define NILFS_INODE_HASHMASK (NILFS_INODE_HASHSIZE - 1)
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/* readdir cookies */
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#define NILFS_DIRCOOKIE_DOT 1
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/* handies */
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#define VFSTONILFS(mp) ((struct nilfs_mount *)mp->mnt_data)
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/* malloc pools */
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MALLOC_DECLARE(M_NILFSMNT);
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MALLOC_DECLARE(M_NILFSTEMP);
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struct pool nilfs_node_pool;
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struct nilfs_node;
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struct nilfs_mount;
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/* structure and derivatives */
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struct nilfs_mdt {
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uint32_t entries_per_block;
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uint32_t entries_per_group;
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uint32_t blocks_per_group;
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uint32_t groups_per_desc_block; /* desc is super group */
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uint32_t blocks_per_desc_block; /* desc is super group */
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};
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/* all that is related to the nilfs itself */
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struct nilfs_device {
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/* device info */
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struct vnode *devvp;
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struct mount *vfs_mountp;
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int refcnt;
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/* meta : super block etc. */
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uint64_t devsize;
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uint32_t blocksize;
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struct nilfs_super_block super, super2;
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struct nilfs_node *dat_node;
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struct nilfs_node *cp_node;
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struct nilfs_node *su_node;
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/* segment usage */
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/* checkpoints */
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/* dat structure and derivatives */
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struct nilfs_mdt dat_mdt;
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struct nilfs_mdt ifile_mdt;
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/* running values */
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int mount_state; /* ? */
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uint64_t last_seg_seq; /* current segment sequence number */
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uint64_t last_seg_num; /* last segment */
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uint64_t next_seg_num; /* next segment to fill */
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uint64_t last_cno; /* current checkpoint number */
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struct nilfs_segment_summary last_segsum;
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struct nilfs_super_root super_root;
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/* syncing and late allocation */
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int syncing; /* are we syncing? */
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/* XXX sync_cv on what mutex? */
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kcondvar_t sync_cv; /* sleeping on sync */
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uint32_t uncomitted_bl; /* for free space */
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/* lists */
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STAILQ_HEAD(nilfs_mnts, nilfs_mount) mounts;
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SLIST_ENTRY(nilfs_device) next_device;
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};
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extern SLIST_HEAD(_nilfs_devices, nilfs_device) nilfs_devices;
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/* a specific mountpoint; head or a checkpoint/snapshot */
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struct nilfs_mount {
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struct mount *vfs_mountp;
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struct nilfs_device *nilfsdev;
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struct nilfs_args mount_args; /* flags RO access */
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/* instance values */
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struct nilfs_node *ifile_node;
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/* hash table to lookup ino -> nilfs_node */
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kmutex_t ihash_lock;
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kmutex_t get_node_lock;
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LIST_HEAD(, nilfs_node) nilfs_nodes[NILFS_INODE_HASHSIZE];
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/* lists */
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STAILQ_ENTRY(nilfs_mount) next_mount; /* in nilfs_device */
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};
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/*
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* NILFS node describing a file/directory.
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*
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* BUGALERT claim node_mutex before reading/writing to prevent inconsistencies !
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*/
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struct nilfs_node {
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struct genfs_node i_gnode; /* has to be first */
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struct vnode *vnode; /* vnode associated */
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struct nilfs_mount *ump;
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struct nilfs_device *nilfsdev;
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ino_t ino;
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struct nilfs_inode inode; /* readin copy */
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struct dirhash *dir_hash; /* if VDIR */
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/* XXX do we need this lock? */
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kmutex_t node_mutex;
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kcondvar_t node_lock; /* sleeping lock */
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char const *lock_fname;
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int lock_lineno;
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/* misc */
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uint32_t i_flags; /* associated flags */
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struct lockf *lockf; /* lock list */
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LIST_ENTRY(nilfs_node) hashchain; /* inside hash line */
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};
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/* misc. flags stored in i_flags (XXX needs cleaning up) */
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#define IN_ACCESS 0x0001 /* Inode access time update request */
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#define IN_CHANGE 0x0002 /* Inode change time update request */
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#define IN_UPDATE 0x0004 /* Inode was written to; update mtime*/
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#define IN_MODIFY 0x0008 /* Modification time update request */
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#define IN_MODIFIED 0x0010 /* node has been modified */
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#define IN_ACCESSED 0x0020 /* node has been accessed */
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#define IN_RENAME 0x0040 /* node is being renamed. XXX ?? */
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#define IN_DELETED 0x0080 /* node is unlinked, no FID reference*/
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#define IN_LOCKED 0x0100 /* node is locked by condvar */
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#define IN_SYNCED 0x0200 /* node is being used by sync */
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#define IN_CALLBACK_ULK 0x0400 /* node will be unlocked by callback */
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#define IN_NODE_REBUILD 0x0800 /* node is rebuild */
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#define IN_FLAGBITS \
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"\10\1IN_ACCESS\2IN_CHANGE\3IN_UPDATE\4IN_MODIFY\5IN_MODIFIED" \
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"\6IN_ACCESSED\7IN_RENAME\10IN_DELETED\11IN_LOCKED\12IN_SYNCED" \
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"\13IN_CALLBACK_ULK\14IN_NODE_REBUILD"
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#endif /* !_FS_NILFS_NILFS_H_ */
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