/* $NetBSD: lfs.h,v 1.160 2013/07/28 01:22:55 dholland Exp $ */ /* from NetBSD: dinode.h,v 1.22 2013/01/22 09:39:18 dholland Exp */ /* from NetBSD: dir.h,v 1.21 2009/07/22 04:49:19 dholland Exp */ /*- * Copyright (c) 1999, 2000, 2001, 2002, 2003 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Konrad E. Schroder . * * 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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. */ /*- * Copyright (c) 1991, 1993 * The Regents of the University of California. 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. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. * * @(#)lfs.h 8.9 (Berkeley) 5/8/95 */ /* * Copyright (c) 2002 Networks Associates Technology, Inc. * All rights reserved. * * This software was developed for the FreeBSD Project by Marshall * Kirk McKusick and Network Associates Laboratories, the Security * Research Division of Network Associates, Inc. under DARPA/SPAWAR * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS * research program * * Copyright (c) 1982, 1989, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * 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. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. * * @(#)dinode.h 8.9 (Berkeley) 3/29/95 */ /* * Copyright (c) 1982, 1986, 1989, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * 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. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. * * @(#)dir.h 8.5 (Berkeley) 4/27/95 */ /* * NOTE: COORDINATE ON-DISK FORMAT CHANGES WITH THE FREEBSD PROJECT. */ #ifndef _UFS_LFS_LFS_H_ #define _UFS_LFS_LFS_H_ #include #include #include #include #include #include /* * Compile-time options for LFS. */ #define LFS_IFIND_RETRIES 16 #define LFS_LOGLENGTH 1024 /* size of debugging log */ #define LFS_MAX_ACTIVE 10 /* Dirty segments before ckp forced */ /* * Fixed filesystem layout parameters */ #define LFS_LABELPAD 8192 /* LFS label size */ #define LFS_SBPAD 8192 /* LFS superblock size */ #define LFS_UNUSED_INUM 0 /* 0: out of band inode number */ #define LFS_IFILE_INUM 1 /* 1: IFILE inode number */ /* 2: Root inode number */ #define LFS_LOSTFOUNDINO 3 /* 3: lost+found inode number */ #define LFS_FIRST_INUM 4 /* 4: first free inode number */ /* * The root inode is the root of the file system. Inode 0 can't be used for * normal purposes and historically bad blocks were linked to inode 1, thus * the root inode is 2. (Inode 1 is no longer used for this purpose, however * numerous dump tapes make this assumption, so we are stuck with it). */ #define ULFS_ROOTINO ((ino_t)2) /* * The Whiteout inode# is a dummy non-zero inode number which will * never be allocated to a real file. It is used as a place holder * in the directory entry which has been tagged as a LFS_DT_WHT entry. * See the comments about ULFS_ROOTINO above. */ #define ULFS_WINO ((ino_t)1) #define LFS_V1_SUMMARY_SIZE 512 /* V1 fixed summary size */ #define LFS_DFL_SUMMARY_SIZE 512 /* Default summary size */ #define LFS_MAX_DADDR 0x7fffffff /* Highest addressable fsb */ #define LFS_MAXNAMLEN 255 /* maximum name length in a dir */ #define ULFS_NXADDR 2 #define ULFS_NDADDR 12 /* Direct addresses in inode. */ #define ULFS_NIADDR 3 /* Indirect addresses in inode. */ /* * Adjustable filesystem parameters */ #ifndef LFS_ATIME_IFILE # define LFS_ATIME_IFILE 0 /* Store atime info in ifile (optional in LFSv1) */ #endif #define LFS_MARKV_MAXBLKCNT 65536 /* Max block count for lfs_markv() */ /* * Directories */ /* * A directory consists of some number of blocks of LFS_DIRBLKSIZ * bytes, where LFS_DIRBLKSIZ is chosen such that it can be transferred * to disk in a single atomic operation (e.g. 512 bytes on most machines). * * Each LFS_DIRBLKSIZ byte block contains some number of directory entry * structures, which are of variable length. Each directory entry has * a struct lfs_direct at the front of it, containing its inode number, * the length of the entry, and the length of the name contained in * the entry. These are followed by the name padded to a 4 byte boundary. * All names are guaranteed null terminated. * The maximum length of a name in a directory is LFS_MAXNAMLEN. * * The macro DIRSIZ(fmt, dp) gives the amount of space required to represent * a directory entry. Free space in a directory is represented by * entries which have dp->d_reclen > DIRSIZ(fmt, dp). All LFS_DIRBLKSIZ bytes * in a directory block are claimed by the directory entries. This * usually results in the last entry in a directory having a large * dp->d_reclen. When entries are deleted from a directory, the * space is returned to the previous entry in the same directory * block by increasing its dp->d_reclen. If the first entry of * a directory block is free, then its dp->d_ino is set to 0. * Entries other than the first in a directory do not normally have * dp->d_ino set to 0. */ /* * Directory block size. */ #undef LFS_DIRBLKSIZ #define LFS_DIRBLKSIZ DEV_BSIZE /* * Convert between stat structure types and directory types. */ #define LFS_IFTODT(mode) (((mode) & 0170000) >> 12) #define LFS_DTTOIF(dirtype) ((dirtype) << 12) /* * The LFS_DIRSIZ macro gives the minimum record length which will hold * the directory entry. This requires the amount of space in struct lfs_direct * without the d_name field, plus enough space for the name with a terminating * null byte (dp->d_namlen+1), rounded up to a 4 byte boundary. */ #define LFS_DIRECTSIZ(namlen) \ ((sizeof(struct lfs_direct) - (LFS_MAXNAMLEN+1)) + (((namlen)+1 + 3) &~ 3)) #if (BYTE_ORDER == LITTLE_ENDIAN) #define LFS_DIRSIZ(oldfmt, dp, needswap) \ (((oldfmt) && !(needswap)) ? \ LFS_DIRECTSIZ((dp)->d_type) : LFS_DIRECTSIZ((dp)->d_namlen)) #else #define LFS_DIRSIZ(oldfmt, dp, needswap) \ (((oldfmt) && (needswap)) ? \ LFS_DIRECTSIZ((dp)->d_type) : LFS_DIRECTSIZ((dp)->d_namlen)) #endif /* Constants for the first argument of LFS_DIRSIZ */ #define LFS_OLDDIRFMT 1 #define LFS_NEWDIRFMT 0 /* * Theoretically, directories can be more than 2Gb in length; however, in * practice this seems unlikely. So, we define the type doff_t as a 32-bit * quantity to keep down the cost of doing lookup on a 32-bit machine. */ #define doff_t int32_t #define lfs_doff_t int32_t #define LFS_MAXDIRSIZE (0x7fffffff) /* * File types for d_type */ #define LFS_DT_UNKNOWN 0 #define LFS_DT_FIFO 1 #define LFS_DT_CHR 2 #define LFS_DT_DIR 4 #define LFS_DT_BLK 6 #define LFS_DT_REG 8 #define LFS_DT_LNK 10 #define LFS_DT_SOCK 12 #define LFS_DT_WHT 14 /* * (See notes above) */ #define d_ino d_fileno struct lfs_direct { u_int32_t d_fileno; /* inode number of entry */ u_int16_t d_reclen; /* length of this record */ u_int8_t d_type; /* file type, see below */ u_int8_t d_namlen; /* length of string in d_name */ char d_name[LFS_MAXNAMLEN + 1];/* name with length <= LFS_MAXNAMLEN */ }; /* * Template for manipulating directories. Should use struct lfs_direct's, * but the name field is LFS_MAXNAMLEN - 1, and this just won't do. */ struct lfs_dirtemplate { u_int32_t dot_ino; int16_t dot_reclen; u_int8_t dot_type; u_int8_t dot_namlen; char dot_name[4]; /* must be multiple of 4 */ u_int32_t dotdot_ino; int16_t dotdot_reclen; u_int8_t dotdot_type; u_int8_t dotdot_namlen; char dotdot_name[4]; /* ditto */ }; /* * This is the old format of directories, sans type element. */ struct lfs_odirtemplate { u_int32_t dot_ino; int16_t dot_reclen; u_int16_t dot_namlen; char dot_name[4]; /* must be multiple of 4 */ u_int32_t dotdot_ino; int16_t dotdot_reclen; u_int16_t dotdot_namlen; char dotdot_name[4]; /* ditto */ }; /* * Inodes */ /* * A dinode contains all the meta-data associated with a LFS file. * This structure defines the on-disk format of a dinode. Since * this structure describes an on-disk structure, all its fields * are defined by types with precise widths. */ struct ulfs1_dinode { u_int16_t di_mode; /* 0: IFMT, permissions; see below. */ int16_t di_nlink; /* 2: File link count. */ u_int32_t di_inumber; /* 4: Inode number. */ u_int64_t di_size; /* 8: File byte count. */ int32_t di_atime; /* 16: Last access time. */ int32_t di_atimensec; /* 20: Last access time. */ int32_t di_mtime; /* 24: Last modified time. */ int32_t di_mtimensec; /* 28: Last modified time. */ int32_t di_ctime; /* 32: Last inode change time. */ int32_t di_ctimensec; /* 36: Last inode change time. */ int32_t di_db[ULFS_NDADDR]; /* 40: Direct disk blocks. */ int32_t di_ib[ULFS_NIADDR]; /* 88: Indirect disk blocks. */ u_int32_t di_flags; /* 100: Status flags (chflags). */ u_int32_t di_blocks; /* 104: Blocks actually held. */ int32_t di_gen; /* 108: Generation number. */ u_int32_t di_uid; /* 112: File owner. */ u_int32_t di_gid; /* 116: File group. */ u_int64_t di_modrev; /* 120: i_modrev for NFSv4 */ }; struct ulfs2_dinode { u_int16_t di_mode; /* 0: IFMT, permissions; see below. */ int16_t di_nlink; /* 2: File link count. */ u_int32_t di_uid; /* 4: File owner. */ u_int32_t di_gid; /* 8: File group. */ u_int32_t di_blksize; /* 12: Inode blocksize. */ u_int64_t di_size; /* 16: File byte count. */ u_int64_t di_blocks; /* 24: Bytes actually held. */ int64_t di_atime; /* 32: Last access time. */ int64_t di_mtime; /* 40: Last modified time. */ int64_t di_ctime; /* 48: Last inode change time. */ int64_t di_birthtime; /* 56: Inode creation time. */ int32_t di_mtimensec; /* 64: Last modified time. */ int32_t di_atimensec; /* 68: Last access time. */ int32_t di_ctimensec; /* 72: Last inode change time. */ int32_t di_birthnsec; /* 76: Inode creation time. */ int32_t di_gen; /* 80: Generation number. */ u_int32_t di_kernflags; /* 84: Kernel flags. */ u_int32_t di_flags; /* 88: Status flags (chflags). */ int32_t di_extsize; /* 92: External attributes block. */ int64_t di_extb[ULFS_NXADDR];/* 96: External attributes block. */ int64_t di_db[ULFS_NDADDR]; /* 112: Direct disk blocks. */ int64_t di_ib[ULFS_NIADDR]; /* 208: Indirect disk blocks. */ u_int64_t di_modrev; /* 232: i_modrev for NFSv4 */ int64_t di_spare[2]; /* 240: Reserved; currently unused */ }; /* * The di_db fields may be overlaid with other information for * file types that do not have associated disk storage. Block * and character devices overlay the first data block with their * dev_t value. Short symbolic links place their path in the * di_db area. */ #define di_rdev di_db[0] /* Size of the on-disk inode. */ #define LFS_DINODE1_SIZE (sizeof(struct ulfs1_dinode)) /* 128 */ #define LFS_DINODE2_SIZE (sizeof(struct ulfs2_dinode)) /* File types, found in the upper bits of di_mode. */ #define LFS_IFMT 0170000 /* Mask of file type. */ #define LFS_IFIFO 0010000 /* Named pipe (fifo). */ #define LFS_IFCHR 0020000 /* Character device. */ #define LFS_IFDIR 0040000 /* Directory file. */ #define LFS_IFBLK 0060000 /* Block device. */ #define LFS_IFREG 0100000 /* Regular file. */ #define LFS_IFLNK 0120000 /* Symbolic link. */ #define LFS_IFSOCK 0140000 /* UNIX domain socket. */ #define LFS_IFWHT 0160000 /* Whiteout. */ /* * Maximum length of a symlink that can be stored within the inode. */ #define ULFS1_MAXSYMLINKLEN ((ULFS_NDADDR + ULFS_NIADDR) * sizeof(int32_t)) #define ULFS2_MAXSYMLINKLEN ((ULFS_NDADDR + ULFS_NIADDR) * sizeof(int64_t)) #define ULFS_MAXSYMLINKLEN(ip) \ ((ip)->i_ump->um_fstype == ULFS1) ? \ ULFS1_MAXSYMLINKLEN : ULFS2_MAXSYMLINKLEN /* * "struct buf" associated definitions */ /* Unassigned disk addresses. */ #define UNASSIGNED -1 #define UNWRITTEN -2 /* Unused logical block number */ #define LFS_UNUSED_LBN -1 # define LFS_LOCK_BUF(bp) do { \ if (((bp)->b_flags & B_LOCKED) == 0 && bp->b_iodone == NULL) { \ mutex_enter(&lfs_lock); \ ++locked_queue_count; \ locked_queue_bytes += bp->b_bufsize; \ mutex_exit(&lfs_lock); \ } \ (bp)->b_flags |= B_LOCKED; \ } while (0) # define LFS_UNLOCK_BUF(bp) do { \ if (((bp)->b_flags & B_LOCKED) != 0 && bp->b_iodone == NULL) { \ mutex_enter(&lfs_lock); \ --locked_queue_count; \ locked_queue_bytes -= bp->b_bufsize; \ if (locked_queue_count < LFS_WAIT_BUFS && \ locked_queue_bytes < LFS_WAIT_BYTES) \ cv_broadcast(&locked_queue_cv); \ mutex_exit(&lfs_lock); \ } \ (bp)->b_flags &= ~B_LOCKED; \ } while (0) /* * "struct inode" associated definitions */ /* For convenience */ #define IN_ALLMOD (IN_MODIFIED|IN_ACCESS|IN_CHANGE|IN_UPDATE|IN_MODIFY|IN_ACCESSED|IN_CLEANING) #define LFS_SET_UINO(ip, flags) do { \ if (((flags) & IN_ACCESSED) && !((ip)->i_flag & IN_ACCESSED)) \ ++(ip)->i_lfs->lfs_uinodes; \ if (((flags) & IN_CLEANING) && !((ip)->i_flag & IN_CLEANING)) \ ++(ip)->i_lfs->lfs_uinodes; \ if (((flags) & IN_MODIFIED) && !((ip)->i_flag & IN_MODIFIED)) \ ++(ip)->i_lfs->lfs_uinodes; \ (ip)->i_flag |= (flags); \ } while (0) #define LFS_CLR_UINO(ip, flags) do { \ if (((flags) & IN_ACCESSED) && ((ip)->i_flag & IN_ACCESSED)) \ --(ip)->i_lfs->lfs_uinodes; \ if (((flags) & IN_CLEANING) && ((ip)->i_flag & IN_CLEANING)) \ --(ip)->i_lfs->lfs_uinodes; \ if (((flags) & IN_MODIFIED) && ((ip)->i_flag & IN_MODIFIED)) \ --(ip)->i_lfs->lfs_uinodes; \ (ip)->i_flag &= ~(flags); \ if ((ip)->i_lfs->lfs_uinodes < 0) { \ panic("lfs_uinodes < 0"); \ } \ } while (0) #define LFS_ITIMES(ip, acc, mod, cre) \ while ((ip)->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY)) \ lfs_itimes(ip, acc, mod, cre) /* * On-disk and in-memory checkpoint segment usage structure. */ typedef struct segusage SEGUSE; struct segusage { u_int32_t su_nbytes; /* 0: number of live bytes */ u_int32_t su_olastmod; /* 4: SEGUSE last modified timestamp */ u_int16_t su_nsums; /* 8: number of summaries in segment */ u_int16_t su_ninos; /* 10: number of inode blocks in seg */ #define SEGUSE_ACTIVE 0x01 /* segment currently being written */ #define SEGUSE_DIRTY 0x02 /* segment has data in it */ #define SEGUSE_SUPERBLOCK 0x04 /* segment contains a superblock */ #define SEGUSE_ERROR 0x08 /* cleaner: do not clean segment */ #define SEGUSE_EMPTY 0x10 /* segment is empty */ #define SEGUSE_INVAL 0x20 /* segment is invalid */ u_int32_t su_flags; /* 12: segment flags */ u_int64_t su_lastmod; /* 16: last modified timestamp */ }; typedef struct segusage_v1 SEGUSE_V1; struct segusage_v1 { u_int32_t su_nbytes; /* 0: number of live bytes */ u_int32_t su_lastmod; /* 4: SEGUSE last modified timestamp */ u_int16_t su_nsums; /* 8: number of summaries in segment */ u_int16_t su_ninos; /* 10: number of inode blocks in seg */ u_int32_t su_flags; /* 12: segment flags */ }; #define SEGUPB(fs) (fs->lfs_sepb) #define SEGTABSIZE_SU(fs) \ (((fs)->lfs_nseg + SEGUPB(fs) - 1) / (fs)->lfs_sepb) #ifdef _KERNEL # define SHARE_IFLOCK(F) \ do { \ rw_enter(&(F)->lfs_iflock, RW_READER); \ } while(0) # define UNSHARE_IFLOCK(F) \ do { \ rw_exit(&(F)->lfs_iflock); \ } while(0) #else /* ! _KERNEL */ # define SHARE_IFLOCK(F) # define UNSHARE_IFLOCK(F) #endif /* ! _KERNEL */ /* Read in the block with a specific segment usage entry from the ifile. */ #define LFS_SEGENTRY(SP, F, IN, BP) do { \ int _e; \ SHARE_IFLOCK(F); \ VTOI((F)->lfs_ivnode)->i_flag |= IN_ACCESS; \ if ((_e = bread((F)->lfs_ivnode, \ ((IN) / (F)->lfs_sepb) + (F)->lfs_cleansz, \ (F)->lfs_bsize, NOCRED, 0, &(BP))) != 0) \ panic("lfs: ifile read: %d", _e); \ if ((F)->lfs_version == 1) \ (SP) = (SEGUSE *)((SEGUSE_V1 *)(BP)->b_data + \ ((IN) & ((F)->lfs_sepb - 1))); \ else \ (SP) = (SEGUSE *)(BP)->b_data + ((IN) % (F)->lfs_sepb); \ UNSHARE_IFLOCK(F); \ } while (0) #define LFS_WRITESEGENTRY(SP, F, IN, BP) do { \ if ((SP)->su_nbytes == 0) \ (SP)->su_flags |= SEGUSE_EMPTY; \ else \ (SP)->su_flags &= ~SEGUSE_EMPTY; \ (F)->lfs_suflags[(F)->lfs_activesb][(IN)] = (SP)->su_flags; \ LFS_BWRITE_LOG(BP); \ } while (0) /* * On-disk file information. One per file with data blocks in the segment. */ typedef struct finfo FINFO; struct finfo { u_int32_t fi_nblocks; /* number of blocks */ u_int32_t fi_version; /* version number */ u_int32_t fi_ino; /* inode number */ u_int32_t fi_lastlength; /* length of last block in array */ int32_t fi_blocks[1]; /* array of logical block numbers */ }; /* sizeof FINFO except fi_blocks */ #define FINFOSIZE (sizeof(FINFO) - sizeof(int32_t)) /* * Index file inode entries. */ typedef struct ifile IFILE; struct ifile { u_int32_t if_version; /* inode version number */ #define LFS_UNUSED_DADDR 0 /* out-of-band daddr */ int32_t if_daddr; /* inode disk address */ #define LFS_ORPHAN_NEXTFREE (~(u_int32_t)0) /* indicate orphaned file */ u_int32_t if_nextfree; /* next-unallocated inode */ u_int32_t if_atime_sec; /* Last access time, seconds */ u_int32_t if_atime_nsec; /* and nanoseconds */ }; typedef struct ifile_v1 IFILE_V1; struct ifile_v1 { u_int32_t if_version; /* inode version number */ int32_t if_daddr; /* inode disk address */ u_int32_t if_nextfree; /* next-unallocated inode */ #if LFS_ATIME_IFILE struct timespec if_atime; /* Last access time */ #endif }; /* * LFSv1 compatibility code is not allowed to touch if_atime, since it * may not be mapped! */ /* Read in the block with a specific inode from the ifile. */ #define LFS_IENTRY(IP, F, IN, BP) do { \ int _e; \ SHARE_IFLOCK(F); \ VTOI((F)->lfs_ivnode)->i_flag |= IN_ACCESS; \ if ((_e = bread((F)->lfs_ivnode, \ (IN) / (F)->lfs_ifpb + (F)->lfs_cleansz + (F)->lfs_segtabsz, \ (F)->lfs_bsize, NOCRED, 0, &(BP))) != 0) \ panic("lfs: ifile ino %d read %d", (int)(IN), _e); \ if ((F)->lfs_version == 1) \ (IP) = (IFILE *)((IFILE_V1 *)(BP)->b_data + \ (IN) % (F)->lfs_ifpb); \ else \ (IP) = (IFILE *)(BP)->b_data + (IN) % (F)->lfs_ifpb; \ UNSHARE_IFLOCK(F); \ } while (0) /* * Cleaner information structure. This resides in the ifile and is used * to pass information from the kernel to the cleaner. */ typedef struct _cleanerinfo { u_int32_t clean; /* number of clean segments */ u_int32_t dirty; /* number of dirty segments */ int32_t bfree; /* disk blocks free */ int32_t avail; /* disk blocks available */ u_int32_t free_head; /* head of the inode free list */ u_int32_t free_tail; /* tail of the inode free list */ #define LFS_CLEANER_MUST_CLEAN 0x01 u_int32_t flags; /* status word from the kernel */ } CLEANERINFO; #define CLEANSIZE_SU(fs) \ ((sizeof(CLEANERINFO) + (fs)->lfs_bsize - 1) >> (fs)->lfs_bshift) /* Read in the block with the cleaner info from the ifile. */ #define LFS_CLEANERINFO(CP, F, BP) do { \ SHARE_IFLOCK(F); \ VTOI((F)->lfs_ivnode)->i_flag |= IN_ACCESS; \ if (bread((F)->lfs_ivnode, \ (daddr_t)0, (F)->lfs_bsize, NOCRED, 0, &(BP))) \ panic("lfs: ifile read"); \ (CP) = (CLEANERINFO *)(BP)->b_data; \ UNSHARE_IFLOCK(F); \ } while (0) /* * Synchronize the Ifile cleaner info with current avail and bfree. */ #define LFS_SYNC_CLEANERINFO(cip, fs, bp, w) do { \ mutex_enter(&lfs_lock); \ if ((w) || (cip)->bfree != (fs)->lfs_bfree || \ (cip)->avail != (fs)->lfs_avail - (fs)->lfs_ravail - \ (fs)->lfs_favail) { \ (cip)->bfree = (fs)->lfs_bfree; \ (cip)->avail = (fs)->lfs_avail - (fs)->lfs_ravail - \ (fs)->lfs_favail; \ if (((bp)->b_flags & B_GATHERED) == 0) { \ (fs)->lfs_flags |= LFS_IFDIRTY; \ } \ mutex_exit(&lfs_lock); \ (void) LFS_BWRITE_LOG(bp); /* Ifile */ \ } else { \ mutex_exit(&lfs_lock); \ brelse(bp, 0); \ } \ } while (0) /* * Get the head of the inode free list. * Always called with the segment lock held. */ #define LFS_GET_HEADFREE(FS, CIP, BP, FREEP) do { \ if ((FS)->lfs_version > 1) { \ LFS_CLEANERINFO((CIP), (FS), (BP)); \ (FS)->lfs_freehd = (CIP)->free_head; \ brelse(BP, 0); \ } \ *(FREEP) = (FS)->lfs_freehd; \ } while (0) #define LFS_PUT_HEADFREE(FS, CIP, BP, VAL) do { \ (FS)->lfs_freehd = (VAL); \ if ((FS)->lfs_version > 1) { \ LFS_CLEANERINFO((CIP), (FS), (BP)); \ (CIP)->free_head = (VAL); \ LFS_BWRITE_LOG(BP); \ mutex_enter(&lfs_lock); \ (FS)->lfs_flags |= LFS_IFDIRTY; \ mutex_exit(&lfs_lock); \ } \ } while (0) #define LFS_GET_TAILFREE(FS, CIP, BP, FREEP) do { \ LFS_CLEANERINFO((CIP), (FS), (BP)); \ *(FREEP) = (CIP)->free_tail; \ brelse(BP, 0); \ } while (0) #define LFS_PUT_TAILFREE(FS, CIP, BP, VAL) do { \ LFS_CLEANERINFO((CIP), (FS), (BP)); \ (CIP)->free_tail = (VAL); \ LFS_BWRITE_LOG(BP); \ mutex_enter(&lfs_lock); \ (FS)->lfs_flags |= LFS_IFDIRTY; \ mutex_exit(&lfs_lock); \ } while (0) /* * On-disk segment summary information */ typedef struct segsum_v1 SEGSUM_V1; struct segsum_v1 { u_int32_t ss_sumsum; /* 0: check sum of summary block */ u_int32_t ss_datasum; /* 4: check sum of data */ u_int32_t ss_magic; /* 8: segment summary magic number */ #define SS_MAGIC 0x061561 int32_t ss_next; /* 12: next segment */ u_int32_t ss_create; /* 16: creation time stamp */ u_int16_t ss_nfinfo; /* 20: number of file info structures */ u_int16_t ss_ninos; /* 22: number of inodes in summary */ #define SS_DIROP 0x01 /* segment begins a dirop */ #define SS_CONT 0x02 /* more partials to finish this write*/ #define SS_CLEAN 0x04 /* written by the cleaner */ #define SS_RFW 0x08 /* written by the roll-forward agent */ #define SS_RECLAIM 0x10 /* written by the roll-forward agent */ u_int16_t ss_flags; /* 24: used for directory operations */ u_int16_t ss_pad; /* 26: extra space */ /* FINFO's and inode daddr's... */ }; typedef struct segsum SEGSUM; struct segsum { u_int32_t ss_sumsum; /* 0: check sum of summary block */ u_int32_t ss_datasum; /* 4: check sum of data */ u_int32_t ss_magic; /* 8: segment summary magic number */ int32_t ss_next; /* 12: next segment */ u_int32_t ss_ident; /* 16: roll-forward fsid */ #define ss_ocreate ss_ident /* ident is where create was in v1 */ u_int16_t ss_nfinfo; /* 20: number of file info structures */ u_int16_t ss_ninos; /* 22: number of inodes in summary */ u_int16_t ss_flags; /* 24: used for directory operations */ u_int8_t ss_pad[2]; /* 26: extra space */ u_int32_t ss_reclino; /* 28: inode being reclaimed */ u_int64_t ss_serial; /* 32: serial number */ u_int64_t ss_create; /* 40: time stamp */ /* FINFO's and inode daddr's... */ }; #define SEGSUM_SIZE(fs) ((fs)->lfs_version == 1 ? sizeof(SEGSUM_V1) : sizeof(SEGSUM)) /* * On-disk super block. */ struct dlfs { #define LFS_MAGIC 0x070162 u_int32_t dlfs_magic; /* 0: magic number */ #define LFS_VERSION 2 u_int32_t dlfs_version; /* 4: version number */ u_int32_t dlfs_size; /* 8: number of blocks in fs (v1) */ /* number of frags in fs (v2) */ u_int32_t dlfs_ssize; /* 12: number of blocks per segment (v1) */ /* number of bytes per segment (v2) */ u_int32_t dlfs_dsize; /* 16: number of disk blocks in fs */ u_int32_t dlfs_bsize; /* 20: file system block size */ u_int32_t dlfs_fsize; /* 24: size of frag blocks in fs */ u_int32_t dlfs_frag; /* 28: number of frags in a block in fs */ /* Checkpoint region. */ u_int32_t dlfs_freehd; /* 32: start of the free list */ int32_t dlfs_bfree; /* 36: number of free disk blocks */ u_int32_t dlfs_nfiles; /* 40: number of allocated inodes */ int32_t dlfs_avail; /* 44: blocks available for writing */ int32_t dlfs_uinodes; /* 48: inodes in cache not yet on disk */ int32_t dlfs_idaddr; /* 52: inode file disk address */ u_int32_t dlfs_ifile; /* 56: inode file inode number */ int32_t dlfs_lastseg; /* 60: address of last segment written */ int32_t dlfs_nextseg; /* 64: address of next segment to write */ int32_t dlfs_curseg; /* 68: current segment being written */ int32_t dlfs_offset; /* 72: offset in curseg for next partial */ int32_t dlfs_lastpseg; /* 76: address of last partial written */ u_int32_t dlfs_inopf; /* 80: v1: time stamp; v2: inodes per frag */ #define dlfs_otstamp dlfs_inopf /* These are configuration parameters. */ u_int32_t dlfs_minfree; /* 84: minimum percentage of free blocks */ /* These fields can be computed from the others. */ u_int64_t dlfs_maxfilesize; /* 88: maximum representable file size */ u_int32_t dlfs_fsbpseg; /* 96: fsb per segment */ u_int32_t dlfs_inopb; /* 100: inodes per block */ u_int32_t dlfs_ifpb; /* 104: IFILE entries per block */ u_int32_t dlfs_sepb; /* 108: SEGUSE entries per block */ u_int32_t dlfs_nindir; /* 112: indirect pointers per block */ u_int32_t dlfs_nseg; /* 116: number of segments */ u_int32_t dlfs_nspf; /* 120: number of sectors per fragment */ u_int32_t dlfs_cleansz; /* 124: cleaner info size in blocks */ u_int32_t dlfs_segtabsz; /* 128: segment table size in blocks */ u_int32_t dlfs_segmask; /* 132: calculate offset within a segment */ u_int32_t dlfs_segshift; /* 136: fast mult/div for segments */ u_int32_t dlfs_bshift; /* 140: calc block number from file offset */ u_int32_t dlfs_ffshift; /* 144: fast mult/div for frag from file */ u_int32_t dlfs_fbshift; /* 148: fast mult/div for frag from block */ u_int64_t dlfs_bmask; /* 152: calc block offset from file offset */ u_int64_t dlfs_ffmask; /* 160: calc frag offset from file offset */ u_int64_t dlfs_fbmask; /* 168: calc frag offset from block offset */ u_int32_t dlfs_blktodb; /* 176: blktodb and dbtoblk shift constant */ u_int32_t dlfs_sushift; /* 180: fast mult/div for segusage table */ int32_t dlfs_maxsymlinklen; /* 184: max length of an internal symlink */ #define LFS_MIN_SBINTERVAL 5 /* minimum superblock segment spacing */ #define LFS_MAXNUMSB 10 /* 188: superblock disk offsets */ int32_t dlfs_sboffs[LFS_MAXNUMSB]; u_int32_t dlfs_nclean; /* 228: Number of clean segments */ u_char dlfs_fsmnt[MNAMELEN]; /* 232: name mounted on */ #define LFS_PF_CLEAN 0x1 u_int16_t dlfs_pflags; /* 322: file system persistent flags */ int32_t dlfs_dmeta; /* 324: total number of dirty summaries */ u_int32_t dlfs_minfreeseg; /* 328: segments not counted in bfree */ u_int32_t dlfs_sumsize; /* 332: size of summary blocks */ u_int64_t dlfs_serial; /* 336: serial number */ u_int32_t dlfs_ibsize; /* 344: size of inode blocks */ int32_t dlfs_start; /* 348: start of segment 0 */ u_int64_t dlfs_tstamp; /* 352: time stamp */ #define LFS_44INODEFMT 0 #define LFS_MAXINODEFMT 0 u_int32_t dlfs_inodefmt; /* 360: inode format version */ u_int32_t dlfs_interleave; /* 364: segment interleave */ u_int32_t dlfs_ident; /* 368: per-fs identifier */ u_int32_t dlfs_fsbtodb; /* 372: fsbtodb and dbtodsb shift constant */ u_int32_t dlfs_resvseg; /* 376: segments reserved for the cleaner */ int8_t dlfs_pad[128]; /* 380: round to 512 bytes */ /* Checksum -- last valid disk field. */ u_int32_t dlfs_cksum; /* 508: checksum for superblock checking */ }; /* Type used for the inode bitmap */ typedef u_int32_t lfs_bm_t; /* * Linked list of segments whose byte count needs updating following a * file truncation. */ struct segdelta { long segnum; size_t num; LIST_ENTRY(segdelta) list; }; /* * In-memory super block. */ struct lfs { struct dlfs lfs_dlfs; /* on-disk parameters */ #define lfs_magic lfs_dlfs.dlfs_magic #define lfs_version lfs_dlfs.dlfs_version #define lfs_size lfs_dlfs.dlfs_size #define lfs_ssize lfs_dlfs.dlfs_ssize #define lfs_dsize lfs_dlfs.dlfs_dsize #define lfs_bsize lfs_dlfs.dlfs_bsize #define lfs_fsize lfs_dlfs.dlfs_fsize #define lfs_frag lfs_dlfs.dlfs_frag #define lfs_freehd lfs_dlfs.dlfs_freehd #define lfs_bfree lfs_dlfs.dlfs_bfree #define lfs_nfiles lfs_dlfs.dlfs_nfiles #define lfs_avail lfs_dlfs.dlfs_avail #define lfs_uinodes lfs_dlfs.dlfs_uinodes #define lfs_idaddr lfs_dlfs.dlfs_idaddr #define lfs_ifile lfs_dlfs.dlfs_ifile #define lfs_lastseg lfs_dlfs.dlfs_lastseg #define lfs_nextseg lfs_dlfs.dlfs_nextseg #define lfs_curseg lfs_dlfs.dlfs_curseg #define lfs_offset lfs_dlfs.dlfs_offset #define lfs_lastpseg lfs_dlfs.dlfs_lastpseg #define lfs_otstamp lfs_dlfs.dlfs_inopf #define lfs_inopf lfs_dlfs.dlfs_inopf #define lfs_minfree lfs_dlfs.dlfs_minfree #define lfs_maxfilesize lfs_dlfs.dlfs_maxfilesize #define lfs_fsbpseg lfs_dlfs.dlfs_fsbpseg #define lfs_inopb lfs_dlfs.dlfs_inopb #define lfs_ifpb lfs_dlfs.dlfs_ifpb #define lfs_sepb lfs_dlfs.dlfs_sepb #define lfs_nindir lfs_dlfs.dlfs_nindir #define lfs_nseg lfs_dlfs.dlfs_nseg #define lfs_nspf lfs_dlfs.dlfs_nspf #define lfs_cleansz lfs_dlfs.dlfs_cleansz #define lfs_segtabsz lfs_dlfs.dlfs_segtabsz #define lfs_segmask lfs_dlfs.dlfs_segmask #define lfs_segshift lfs_dlfs.dlfs_segshift #define lfs_bmask lfs_dlfs.dlfs_bmask #define lfs_bshift lfs_dlfs.dlfs_bshift #define lfs_ffmask lfs_dlfs.dlfs_ffmask #define lfs_ffshift lfs_dlfs.dlfs_ffshift #define lfs_fbmask lfs_dlfs.dlfs_fbmask #define lfs_fbshift lfs_dlfs.dlfs_fbshift #define lfs_blktodb lfs_dlfs.dlfs_blktodb #define lfs_fsbtodb lfs_dlfs.dlfs_fsbtodb #define lfs_sushift lfs_dlfs.dlfs_sushift #define lfs_maxsymlinklen lfs_dlfs.dlfs_maxsymlinklen #define lfs_sboffs lfs_dlfs.dlfs_sboffs #define lfs_cksum lfs_dlfs.dlfs_cksum #define lfs_pflags lfs_dlfs.dlfs_pflags #define lfs_fsmnt lfs_dlfs.dlfs_fsmnt #define lfs_nclean lfs_dlfs.dlfs_nclean #define lfs_dmeta lfs_dlfs.dlfs_dmeta #define lfs_minfreeseg lfs_dlfs.dlfs_minfreeseg #define lfs_sumsize lfs_dlfs.dlfs_sumsize #define lfs_serial lfs_dlfs.dlfs_serial #define lfs_ibsize lfs_dlfs.dlfs_ibsize #define lfs_start lfs_dlfs.dlfs_start #define lfs_tstamp lfs_dlfs.dlfs_tstamp #define lfs_inodefmt lfs_dlfs.dlfs_inodefmt #define lfs_interleave lfs_dlfs.dlfs_interleave #define lfs_ident lfs_dlfs.dlfs_ident #define lfs_resvseg lfs_dlfs.dlfs_resvseg /* These fields are set at mount time and are meaningless on disk. */ struct segment *lfs_sp; /* current segment being written */ struct vnode *lfs_ivnode; /* vnode for the ifile */ u_int32_t lfs_seglock; /* single-thread the segment writer */ pid_t lfs_lockpid; /* pid of lock holder */ lwpid_t lfs_locklwp; /* lwp of lock holder */ u_int32_t lfs_iocount; /* number of ios pending */ u_int32_t lfs_writer; /* don't allow any dirops to start */ u_int32_t lfs_dirops; /* count of active directory ops */ u_int32_t lfs_dirvcount; /* count of VDIROP nodes in this fs */ u_int32_t lfs_doifile; /* Write ifile blocks on next write */ u_int32_t lfs_nactive; /* Number of segments since last ckp */ int8_t lfs_fmod; /* super block modified flag */ int8_t lfs_ronly; /* mounted read-only flag */ #define LFS_NOTYET 0x01 #define LFS_IFDIRTY 0x02 #define LFS_WARNED 0x04 #define LFS_UNDIROP 0x08 int8_t lfs_flags; /* currently unused flag */ u_int16_t lfs_activesb; /* toggle between superblocks */ daddr_t lfs_sbactive; /* disk address of current sb write */ struct vnode *lfs_flushvp; /* vnode being flushed */ int lfs_flushvp_fakevref; /* fake vref count for flushvp */ struct vnode *lfs_unlockvp; /* being inactivated in lfs_segunlock */ u_int32_t lfs_diropwait; /* # procs waiting on dirop flush */ size_t lfs_devbsize; /* Device block size */ size_t lfs_devbshift; /* Device block shift */ krwlock_t lfs_fraglock; krwlock_t lfs_iflock; /* Ifile lock */ kcondvar_t lfs_stopcv; /* Wrap lock */ struct lwp *lfs_stoplwp; pid_t lfs_rfpid; /* Process ID of roll-forward agent */ int lfs_nadirop; /* number of active dirop nodes */ long lfs_ravail; /* blocks pre-reserved for writing */ long lfs_favail; /* blocks pre-reserved for writing */ struct lfs_res_blk *lfs_resblk; /* Reserved memory for pageout */ TAILQ_HEAD(, inode) lfs_dchainhd; /* dirop vnodes */ TAILQ_HEAD(, inode) lfs_pchainhd; /* paging vnodes */ #define LFS_RESHASH_WIDTH 17 LIST_HEAD(, lfs_res_blk) lfs_reshash[LFS_RESHASH_WIDTH]; int lfs_pdflush; /* pagedaemon wants us to flush */ u_int32_t **lfs_suflags; /* Segment use flags */ #ifdef _KERNEL struct pool lfs_clpool; /* Pool for struct lfs_cluster */ struct pool lfs_bpppool; /* Pool for bpp */ struct pool lfs_segpool; /* Pool for struct segment */ #endif /* _KERNEL */ #define LFS_MAX_CLEANIND 64 int32_t lfs_cleanint[LFS_MAX_CLEANIND]; /* Active cleaning intervals */ int lfs_cleanind; /* Index into intervals */ int lfs_sleepers; /* # procs sleeping this fs */ int lfs_pages; /* dirty pages blaming this fs */ lfs_bm_t *lfs_ino_bitmap; /* Inuse inodes bitmap */ int lfs_nowrap; /* Suspend log wrap */ int lfs_wrappass; /* Allow first log wrap requester to pass */ int lfs_wrapstatus; /* Wrap status */ int lfs_reclino; /* Inode being reclaimed */ int lfs_startseg; /* Segment we started writing at */ LIST_HEAD(, segdelta) lfs_segdhd; /* List of pending trunc accounting events */ #ifdef _KERNEL /* ULFS-level information */ u_int32_t um_flags; /* ULFS flags (below) */ u_long um_nindir; /* indirect ptrs per block */ u_long um_lognindir; /* log2 of um_nindir */ u_long um_bptrtodb; /* indir ptr to disk block */ u_long um_seqinc; /* inc between seq blocks */ int um_maxsymlinklen; int um_dirblksiz; u_int64_t um_maxfilesize; /* Stuff used by quota2 code, not currently operable */ unsigned lfs_use_quota2 : 1; uint32_t lfs_quota_magic; uint8_t lfs_quota_flags; uint64_t lfs_quotaino[2]; #endif }; /* LFS_NINDIR is the number of indirects in a file system block. */ #define LFS_NINDIR(fs) ((fs)->lfs_nindir) /* LFS_INOPB is the number of inodes in a secondary storage block. */ #define LFS_INOPB(fs) ((fs)->lfs_inopb) /* LFS_INOPF is the number of inodes in a fragment. */ #define LFS_INOPF(fs) ((fs)->lfs_inopf) #define lfs_blksize(fs, ip, lbn) \ (((lbn) >= ULFS_NDADDR || (ip)->i_ffs1_size >= ((lbn) + 1) << (fs)->lfs_bshift) \ ? (fs)->lfs_bsize \ : (lfs_fragroundup(fs, lfs_blkoff(fs, (ip)->i_ffs1_size)))) #define lfs_blkoff(fs, loc) ((int)((loc) & (fs)->lfs_bmask)) #define lfs_fragoff(fs, loc) /* calculates (loc % fs->lfs_fsize) */ \ ((int)((loc) & (fs)->lfs_ffmask)) #if defined(_KERNEL) #define LFS_FSBTODB(fs, b) ((b) << ((fs)->lfs_ffshift - DEV_BSHIFT)) #define LFS_DBTOFSB(fs, b) ((b) >> ((fs)->lfs_ffshift - DEV_BSHIFT)) #else #define LFS_FSBTODB(fs, b) ((b) << (fs)->lfs_fsbtodb) #define LFS_DBTOFSB(fs, b) ((b) >> (fs)->lfs_fsbtodb) #endif #define lfs_lblkno(fs, loc) ((loc) >> (fs)->lfs_bshift) #define lfs_lblktosize(fs, blk) ((blk) << (fs)->lfs_bshift) #define lfs_fsbtob(fs, b) ((b) << (fs)->lfs_ffshift) #define lfs_btofsb(fs, b) ((b) >> (fs)->lfs_ffshift) #define lfs_numfrags(fs, loc) /* calculates (loc / fs->lfs_fsize) */ \ ((loc) >> (fs)->lfs_ffshift) #define lfs_blkroundup(fs, size)/* calculates roundup(size, fs->lfs_bsize) */ \ ((off_t)(((size) + (fs)->lfs_bmask) & (~(fs)->lfs_bmask))) #define lfs_fragroundup(fs, size)/* calculates roundup(size, fs->lfs_fsize) */ \ ((off_t)(((size) + (fs)->lfs_ffmask) & (~(fs)->lfs_ffmask))) #define lfs_fragstoblks(fs, frags)/* calculates (frags / fs->fs_frag) */ \ ((frags) >> (fs)->lfs_fbshift) #define lfs_blkstofrags(fs, blks)/* calculates (blks * fs->fs_frag) */ \ ((blks) << (fs)->lfs_fbshift) #define lfs_fragnum(fs, fsb) /* calculates (fsb % fs->lfs_frag) */ \ ((fsb) & ((fs)->lfs_frag - 1)) #define lfs_blknum(fs, fsb) /* calculates rounddown(fsb, fs->lfs_frag) */ \ ((fsb) &~ ((fs)->lfs_frag - 1)) #define lfs_dblksize(fs, dp, lbn) \ (((lbn) >= ULFS_NDADDR || (dp)->di_size >= ((lbn) + 1) << (fs)->lfs_bshift)\ ? (fs)->lfs_bsize \ : (lfs_fragroundup(fs, lfs_blkoff(fs, (dp)->di_size)))) #define lfs_segsize(fs) ((fs)->lfs_version == 1 ? \ lfs_lblktosize((fs), (fs)->lfs_ssize) : \ (fs)->lfs_ssize) #define lfs_segtod(fs, seg) (((fs)->lfs_version == 1 ? \ (fs)->lfs_ssize << (fs)->lfs_blktodb : \ lfs_btofsb((fs), (fs)->lfs_ssize)) * (seg)) #define lfs_dtosn(fs, daddr) /* block address to segment number */ \ ((uint32_t)(((daddr) - (fs)->lfs_start) / lfs_segtod((fs), 1))) #define lfs_sntod(fs, sn) /* segment number to disk address */ \ ((daddr_t)(lfs_segtod((fs), (sn)) + (fs)->lfs_start)) /* * Structures used by lfs_bmapv and lfs_markv to communicate information * about inodes and data blocks. */ typedef struct block_info { u_int32_t bi_inode; /* inode # */ int32_t bi_lbn; /* logical block w/in file */ int32_t bi_daddr; /* disk address of block */ u_int64_t bi_segcreate; /* origin segment create time */ int bi_version; /* file version number */ void *bi_bp; /* data buffer */ int bi_size; /* size of the block (if fragment) */ } BLOCK_INFO; /* Compatibility for 1.5 binaries */ typedef struct block_info_15 { u_int32_t bi_inode; /* inode # */ int32_t bi_lbn; /* logical block w/in file */ int32_t bi_daddr; /* disk address of block */ u_int32_t bi_segcreate; /* origin segment create time */ int bi_version; /* file version number */ void *bi_bp; /* data buffer */ int bi_size; /* size of the block (if fragment) */ } BLOCK_INFO_15; /* In-memory description of a segment about to be written. */ struct segment { struct lfs *fs; /* file system pointer */ struct buf **bpp; /* pointer to buffer array */ struct buf **cbpp; /* pointer to next available bp */ struct buf **start_bpp; /* pointer to first bp in this set */ struct buf *ibp; /* buffer pointer to inode page */ struct ulfs1_dinode *idp; /* pointer to ifile dinode */ struct finfo *fip; /* current fileinfo pointer */ struct vnode *vp; /* vnode being gathered */ void *segsum; /* segment summary info */ u_int32_t ninodes; /* number of inodes in this segment */ int32_t seg_bytes_left; /* bytes left in segment */ int32_t sum_bytes_left; /* bytes left in summary block */ u_int32_t seg_number; /* number of this segment */ int32_t *start_lbp; /* beginning lbn for this set */ #define SEGM_CKP 0x0001 /* doing a checkpoint */ #define SEGM_CLEAN 0x0002 /* cleaner call; don't sort */ #define SEGM_SYNC 0x0004 /* wait for segment */ #define SEGM_PROT 0x0008 /* don't inactivate at segunlock */ #define SEGM_PAGEDAEMON 0x0010 /* pagedaemon called us */ #define SEGM_WRITERD 0x0020 /* LFS writed called us */ #define SEGM_FORCE_CKP 0x0040 /* Force checkpoint right away */ #define SEGM_RECLAIM 0x0080 /* Writing to reclaim vnode */ #define SEGM_SINGLE 0x0100 /* Opportunistic writevnodes */ u_int16_t seg_flags; /* run-time flags for this segment */ u_int32_t seg_iocount; /* number of ios pending */ int ndupino; /* number of duplicate inodes */ }; /* * Macros for determining free space on the disk, with the variable metadata * of segment summaries and inode blocks taken into account. */ /* * Estimate number of clean blocks not available for writing because * they will contain metadata or overhead. This is calculated as * * E = ((C * M / D) * D + (0) * (T - D)) / T * or more simply * E = (C * M) / T * * where * C is the clean space, * D is the dirty space, * M is the dirty metadata, and * T = C + D is the total space on disk. * * This approximates the old formula of E = C * M / D when D is close to T, * but avoids falsely reporting "disk full" when the sample size (D) is small. */ #define LFS_EST_CMETA(F) (int32_t)(( \ ((F)->lfs_dmeta * (int64_t)(F)->lfs_nclean) / \ ((F)->lfs_nseg))) /* Estimate total size of the disk not including metadata */ #define LFS_EST_NONMETA(F) ((F)->lfs_dsize - (F)->lfs_dmeta - LFS_EST_CMETA(F)) /* Estimate number of blocks actually available for writing */ #define LFS_EST_BFREE(F) ((F)->lfs_bfree > LFS_EST_CMETA(F) ? \ (F)->lfs_bfree - LFS_EST_CMETA(F) : 0) /* Amount of non-meta space not available to mortal man */ #define LFS_EST_RSVD(F) (int32_t)((LFS_EST_NONMETA(F) * \ (u_int64_t)(F)->lfs_minfree) / \ 100) /* Can credential C write BB blocks */ #define ISSPACE(F, BB, C) \ ((((C) == NOCRED || kauth_cred_geteuid(C) == 0) && \ LFS_EST_BFREE(F) >= (BB)) || \ (kauth_cred_geteuid(C) != 0 && IS_FREESPACE(F, BB))) /* Can an ordinary user write BB blocks */ #define IS_FREESPACE(F, BB) \ (LFS_EST_BFREE(F) >= (BB) + LFS_EST_RSVD(F)) /* * The minimum number of blocks to create a new inode. This is: * directory direct block (1) + ULFS_NIADDR indirect blocks + inode block (1) + * ifile direct block (1) + ULFS_NIADDR indirect blocks = 3 + 2 * ULFS_NIADDR blocks. */ #define LFS_NRESERVE(F) (lfs_btofsb((F), (2 * ULFS_NIADDR + 3) << (F)->lfs_bshift)) /* Statistics Counters */ struct lfs_stats { /* Must match sysctl list in lfs_vfsops.h ! */ u_int segsused; u_int psegwrites; u_int psyncwrites; u_int pcleanwrites; u_int blocktot; u_int cleanblocks; u_int ncheckpoints; u_int nwrites; u_int nsync_writes; u_int wait_exceeded; u_int write_exceeded; u_int flush_invoked; u_int vflush_invoked; u_int clean_inlocked; u_int clean_vnlocked; u_int segs_reclaimed; }; /* Fcntls to take the place of the lfs syscalls */ struct lfs_fcntl_markv { BLOCK_INFO *blkiov; /* blocks to relocate */ int blkcnt; /* number of blocks */ }; #define LFCNSEGWAITALL _FCNR_FSPRIV('L', 14, struct timeval) #define LFCNSEGWAIT _FCNR_FSPRIV('L', 15, struct timeval) #define LFCNBMAPV _FCNRW_FSPRIV('L', 2, struct lfs_fcntl_markv) #define LFCNMARKV _FCNRW_FSPRIV('L', 3, struct lfs_fcntl_markv) #define LFCNRECLAIM _FCNO_FSPRIV('L', 4) struct lfs_fhandle { char space[28]; /* FHANDLE_SIZE_COMPAT (but used from userland too) */ }; #define LFCNREWIND _FCNR_FSPRIV('L', 6, int) #define LFCNINVAL _FCNR_FSPRIV('L', 7, int) #define LFCNRESIZE _FCNR_FSPRIV('L', 8, int) #define LFCNWRAPSTOP _FCNR_FSPRIV('L', 9, int) #define LFCNWRAPGO _FCNR_FSPRIV('L', 10, int) #define LFCNIFILEFH _FCNW_FSPRIV('L', 11, struct lfs_fhandle) #define LFCNWRAPPASS _FCNR_FSPRIV('L', 12, int) # define LFS_WRAP_GOING 0x0 # define LFS_WRAP_WAITING 0x1 #define LFCNWRAPSTATUS _FCNW_FSPRIV('L', 13, int) /* Debug segment lock */ #ifdef notyet # define ASSERT_SEGLOCK(fs) KASSERT(LFS_SEGLOCK_HELD(fs)) # define ASSERT_NO_SEGLOCK(fs) KASSERT(!LFS_SEGLOCK_HELD(fs)) # define ASSERT_DUNNO_SEGLOCK(fs) # define ASSERT_MAYBE_SEGLOCK(fs) #else /* !notyet */ # define ASSERT_DUNNO_SEGLOCK(fs) \ DLOG((DLOG_SEG, "lfs func %s seglock wrong (%d)\n", __func__, \ LFS_SEGLOCK_HELD(fs))) # define ASSERT_SEGLOCK(fs) do { \ if (!LFS_SEGLOCK_HELD(fs)) { \ DLOG((DLOG_SEG, "lfs func %s seglock wrong (0)\n", __func__)); \ } \ } while(0) # define ASSERT_NO_SEGLOCK(fs) do { \ if (LFS_SEGLOCK_HELD(fs)) { \ DLOG((DLOG_SEG, "lfs func %s seglock wrong (1)\n", __func__)); \ } \ } while(0) # define ASSERT_MAYBE_SEGLOCK(x) #endif /* !notyet */ /* * Arguments to mount LFS filesystems */ struct ulfs_args { char *fspec; /* block special device to mount */ }; __BEGIN_DECLS void lfs_itimes(struct inode *, const struct timespec *, const struct timespec *, const struct timespec *); __END_DECLS #endif /* !_UFS_LFS_LFS_H_ */