/* $NetBSD: nilfs.h,v 1.6 2020/03/21 13:38:29 reinoud 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 #include #include #include #include #include #include #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 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<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_ */