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962 lines
35 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* linux/include/linux/ufs_fs.h |
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* |
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* Copyright (C) 1996 |
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* Adrian Rodriguez ([email protected]) |
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* Laboratory for Computer Science Research Computing Facility |
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* Rutgers, The State University of New Jersey |
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* |
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* Clean swab support by Fare <[email protected]> |
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* just hope no one is using NNUUXXI on __?64 structure elements |
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* 64-bit clean thanks to Maciej W. Rozycki <[email protected]> |
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* |
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* 4.4BSD (FreeBSD) support added on February 1st 1998 by |
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* Niels Kristian Bech Jensen <[email protected]> partially based |
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* on code by Martin von Loewis <[email protected]>. |
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* |
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* NeXTstep support added on February 5th 1998 by |
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* Niels Kristian Bech Jensen <[email protected]>. |
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* |
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* Write support by Daniel Pirkl <[email protected]> |
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* |
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* HP/UX hfs filesystem support added by |
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* Martin K. Petersen <[email protected]>, August 1999 |
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* |
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* UFS2 (of FreeBSD 5.x) support added by |
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* Niraj Kumar <[email protected]> , Jan 2004 |
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* |
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*/ |
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#ifndef __LINUX_UFS_FS_H |
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#define __LINUX_UFS_FS_H |
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#include <linux/types.h> |
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#include <linux/kernel.h> |
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#include <linux/stat.h> |
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#include <linux/fs.h> |
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#include <linux/workqueue.h> |
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#include <asm/div64.h> |
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typedef __u64 __bitwise __fs64; |
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typedef __u32 __bitwise __fs32; |
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typedef __u16 __bitwise __fs16; |
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#define UFS_BBLOCK 0 |
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#define UFS_BBSIZE 8192 |
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#define UFS_SBLOCK 8192 |
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#define UFS_SBSIZE 8192 |
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#define UFS_SECTOR_SIZE 512 |
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#define UFS_SECTOR_BITS 9 |
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#define UFS_MAGIC 0x00011954 |
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#define UFS_MAGIC_BW 0x0f242697 |
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#define UFS2_MAGIC 0x19540119 |
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#define UFS_CIGAM 0x54190100 /* byteswapped MAGIC */ |
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|
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/* Copied from FreeBSD */ |
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/* |
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* Each disk drive contains some number of filesystems. |
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* A filesystem consists of a number of cylinder groups. |
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* Each cylinder group has inodes and data. |
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* |
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* A filesystem is described by its super-block, which in turn |
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* describes the cylinder groups. The super-block is critical |
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* data and is replicated in each cylinder group to protect against |
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* catastrophic loss. This is done at `newfs' time and the critical |
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* super-block data does not change, so the copies need not be |
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* referenced further unless disaster strikes. |
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* |
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* For filesystem fs, the offsets of the various blocks of interest |
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* are given in the super block as: |
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* [fs->fs_sblkno] Super-block |
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* [fs->fs_cblkno] Cylinder group block |
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* [fs->fs_iblkno] Inode blocks |
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* [fs->fs_dblkno] Data blocks |
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* The beginning of cylinder group cg in fs, is given by |
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* the ``cgbase(fs, cg)'' macro. |
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* |
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* Depending on the architecture and the media, the superblock may |
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* reside in any one of four places. For tiny media where every block |
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* counts, it is placed at the very front of the partition. Historically, |
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* UFS1 placed it 8K from the front to leave room for the disk label and |
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* a small bootstrap. For UFS2 it got moved to 64K from the front to leave |
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* room for the disk label and a bigger bootstrap, and for really piggy |
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* systems we check at 256K from the front if the first three fail. In |
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* all cases the size of the superblock will be SBLOCKSIZE. All values are |
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* given in byte-offset form, so they do not imply a sector size. The |
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* SBLOCKSEARCH specifies the order in which the locations should be searched. |
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*/ |
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#define SBLOCK_FLOPPY 0 |
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#define SBLOCK_UFS1 8192 |
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#define SBLOCK_UFS2 65536 |
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#define SBLOCK_PIGGY 262144 |
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#define SBLOCKSIZE 8192 |
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#define SBLOCKSEARCH \ |
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{ SBLOCK_UFS2, SBLOCK_UFS1, SBLOCK_FLOPPY, SBLOCK_PIGGY, -1 } |
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/* HP specific MAGIC values */ |
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#define UFS_MAGIC_LFN 0x00095014 /* fs supports filenames > 14 chars */ |
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#define UFS_CIGAM_LFN 0x14500900 /* srahc 41 < semanelif stroppus sf */ |
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#define UFS_MAGIC_SEC 0x00612195 /* B1 security fs */ |
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#define UFS_CIGAM_SEC 0x95216100 |
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#define UFS_MAGIC_FEA 0x00195612 /* fs_featurebits supported */ |
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#define UFS_CIGAM_FEA 0x12561900 |
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#define UFS_MAGIC_4GB 0x05231994 /* fs > 4 GB && fs_featurebits */ |
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#define UFS_CIGAM_4GB 0x94192305 |
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/* Seems somebody at HP goofed here. B1 and lfs are both 0x2 !?! */ |
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#define UFS_FSF_LFN 0x00000001 /* long file names */ |
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#define UFS_FSF_B1 0x00000002 /* B1 security */ |
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#define UFS_FSF_LFS 0x00000002 /* large files */ |
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#define UFS_FSF_LUID 0x00000004 /* large UIDs */ |
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/* End of HP stuff */ |
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#define UFS_BSIZE 8192 |
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#define UFS_MINBSIZE 4096 |
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#define UFS_FSIZE 1024 |
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#define UFS_MAXFRAG (UFS_BSIZE / UFS_FSIZE) |
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#define UFS_NDADDR 12 |
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#define UFS_NINDIR 3 |
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#define UFS_IND_BLOCK (UFS_NDADDR + 0) |
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#define UFS_DIND_BLOCK (UFS_NDADDR + 1) |
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#define UFS_TIND_BLOCK (UFS_NDADDR + 2) |
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#define UFS_NDIR_FRAGMENT (UFS_NDADDR << uspi->s_fpbshift) |
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#define UFS_IND_FRAGMENT (UFS_IND_BLOCK << uspi->s_fpbshift) |
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#define UFS_DIND_FRAGMENT (UFS_DIND_BLOCK << uspi->s_fpbshift) |
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#define UFS_TIND_FRAGMENT (UFS_TIND_BLOCK << uspi->s_fpbshift) |
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#define UFS_ROOTINO 2 |
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#define UFS_FIRST_INO (UFS_ROOTINO + 1) |
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#define UFS_USEEFT ((__u16)65535) |
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|
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/* fs_clean values */ |
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#define UFS_FSOK 0x7c269d38 |
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#define UFS_FSACTIVE ((__s8)0x00) |
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#define UFS_FSCLEAN ((__s8)0x01) |
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#define UFS_FSSTABLE ((__s8)0x02) |
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#define UFS_FSOSF1 ((__s8)0x03) /* is this correct for DEC OSF/1? */ |
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#define UFS_FSBAD ((__s8)0xff) |
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/* Solaris-specific fs_clean values */ |
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#define UFS_FSSUSPEND ((__s8)0xfe) /* temporarily suspended */ |
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#define UFS_FSLOG ((__s8)0xfd) /* logging fs */ |
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#define UFS_FSFIX ((__s8)0xfc) /* being repaired while mounted */ |
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/* From here to next blank line, s_flags for ufs_sb_info */ |
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/* directory entry encoding */ |
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#define UFS_DE_MASK 0x00000010 /* mask for the following */ |
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#define UFS_DE_OLD 0x00000000 |
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#define UFS_DE_44BSD 0x00000010 |
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/* uid encoding */ |
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#define UFS_UID_MASK 0x00000060 /* mask for the following */ |
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#define UFS_UID_OLD 0x00000000 |
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#define UFS_UID_44BSD 0x00000020 |
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#define UFS_UID_EFT 0x00000040 |
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/* superblock state encoding */ |
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#define UFS_ST_MASK 0x00000700 /* mask for the following */ |
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#define UFS_ST_OLD 0x00000000 |
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#define UFS_ST_44BSD 0x00000100 |
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#define UFS_ST_SUN 0x00000200 /* Solaris */ |
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#define UFS_ST_SUNOS 0x00000300 |
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#define UFS_ST_SUNx86 0x00000400 /* Solaris x86 */ |
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/*cylinder group encoding */ |
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#define UFS_CG_MASK 0x00003000 /* mask for the following */ |
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#define UFS_CG_OLD 0x00000000 |
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#define UFS_CG_44BSD 0x00002000 |
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#define UFS_CG_SUN 0x00001000 |
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/* filesystem type encoding */ |
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#define UFS_TYPE_MASK 0x00010000 /* mask for the following */ |
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#define UFS_TYPE_UFS1 0x00000000 |
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#define UFS_TYPE_UFS2 0x00010000 |
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/* fs_inodefmt options */ |
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#define UFS_42INODEFMT -1 |
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#define UFS_44INODEFMT 2 |
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/* |
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* MINFREE gives the minimum acceptable percentage of file system |
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* blocks which may be free. If the freelist drops below this level |
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* only the superuser may continue to allocate blocks. This may |
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* be set to 0 if no reserve of free blocks is deemed necessary, |
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* however throughput drops by fifty percent if the file system |
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* is run at between 95% and 100% full; thus the minimum default |
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* value of fs_minfree is 5%. However, to get good clustering |
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* performance, 10% is a better choice. hence we use 10% as our |
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* default value. With 10% free space, fragmentation is not a |
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* problem, so we choose to optimize for time. |
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*/ |
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#define UFS_MINFREE 5 |
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#define UFS_DEFAULTOPT UFS_OPTTIME |
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/* |
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* Turn file system block numbers into disk block addresses. |
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* This maps file system blocks to device size blocks. |
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*/ |
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#define ufs_fsbtodb(uspi, b) ((b) << (uspi)->s_fsbtodb) |
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#define ufs_dbtofsb(uspi, b) ((b) >> (uspi)->s_fsbtodb) |
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/* |
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* Cylinder group macros to locate things in cylinder groups. |
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* They calc file system addresses of cylinder group data structures. |
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*/ |
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#define ufs_cgbase(c) (uspi->s_fpg * (c)) |
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#define ufs_cgstart(c) ((uspi)->fs_magic == UFS2_MAGIC ? ufs_cgbase(c) : \ |
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(ufs_cgbase(c) + uspi->s_cgoffset * ((c) & ~uspi->s_cgmask))) |
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#define ufs_cgsblock(c) (ufs_cgstart(c) + uspi->s_sblkno) /* super blk */ |
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#define ufs_cgcmin(c) (ufs_cgstart(c) + uspi->s_cblkno) /* cg block */ |
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#define ufs_cgimin(c) (ufs_cgstart(c) + uspi->s_iblkno) /* inode blk */ |
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#define ufs_cgdmin(c) (ufs_cgstart(c) + uspi->s_dblkno) /* 1st data */ |
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/* |
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* Macros for handling inode numbers: |
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* inode number to file system block offset. |
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* inode number to cylinder group number. |
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* inode number to file system block address. |
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*/ |
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#define ufs_inotocg(x) ((x) / uspi->s_ipg) |
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#define ufs_inotocgoff(x) ((x) % uspi->s_ipg) |
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#define ufs_inotofsba(x) (((u64)ufs_cgimin(ufs_inotocg(x))) + ufs_inotocgoff(x) / uspi->s_inopf) |
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#define ufs_inotofsbo(x) ((x) % uspi->s_inopf) |
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/* |
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* Compute the cylinder and rotational position of a cyl block addr. |
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*/ |
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#define ufs_cbtocylno(bno) \ |
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((bno) * uspi->s_nspf / uspi->s_spc) |
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#define ufs_cbtorpos(bno) \ |
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((UFS_SB(sb)->s_flags & UFS_CG_SUN) ? \ |
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(((((bno) * uspi->s_nspf % uspi->s_spc) % \ |
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uspi->s_nsect) * \ |
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uspi->s_nrpos) / uspi->s_nsect) \ |
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: \ |
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((((bno) * uspi->s_nspf % uspi->s_spc / uspi->s_nsect \ |
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* uspi->s_trackskew + (bno) * uspi->s_nspf % uspi->s_spc \ |
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% uspi->s_nsect * uspi->s_interleave) % uspi->s_nsect \ |
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* uspi->s_nrpos) / uspi->s_npsect)) |
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/* |
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* The following macros optimize certain frequently calculated |
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* quantities by using shifts and masks in place of divisions |
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* modulos and multiplications. |
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*/ |
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#define ufs_blkoff(loc) ((loc) & uspi->s_qbmask) |
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#define ufs_fragoff(loc) ((loc) & uspi->s_qfmask) |
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#define ufs_lblktosize(blk) ((blk) << uspi->s_bshift) |
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#define ufs_lblkno(loc) ((loc) >> uspi->s_bshift) |
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#define ufs_numfrags(loc) ((loc) >> uspi->s_fshift) |
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#define ufs_blkroundup(size) (((size) + uspi->s_qbmask) & uspi->s_bmask) |
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#define ufs_fragroundup(size) (((size) + uspi->s_qfmask) & uspi->s_fmask) |
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#define ufs_fragstoblks(frags) ((frags) >> uspi->s_fpbshift) |
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#define ufs_blkstofrags(blks) ((blks) << uspi->s_fpbshift) |
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#define ufs_fragnum(fsb) ((fsb) & uspi->s_fpbmask) |
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#define ufs_blknum(fsb) ((fsb) & ~uspi->s_fpbmask) |
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#define UFS_MAXNAMLEN 255 |
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#define UFS_MAXMNTLEN 512 |
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#define UFS2_MAXMNTLEN 468 |
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#define UFS2_MAXVOLLEN 32 |
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#define UFS_MAXCSBUFS 31 |
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#define UFS_LINK_MAX 32000 |
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/* |
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#define UFS2_NOCSPTRS ((128 / sizeof(void *)) - 4) |
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*/ |
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#define UFS2_NOCSPTRS 28 |
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/* |
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* UFS_DIR_PAD defines the directory entries boundaries |
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* (must be a multiple of 4) |
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*/ |
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#define UFS_DIR_PAD 4 |
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#define UFS_DIR_ROUND (UFS_DIR_PAD - 1) |
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#define UFS_DIR_REC_LEN(name_len) (((name_len) + 1 + 8 + UFS_DIR_ROUND) & ~UFS_DIR_ROUND) |
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struct ufs_timeval { |
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__fs32 tv_sec; |
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__fs32 tv_usec; |
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}; |
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struct ufs_dir_entry { |
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__fs32 d_ino; /* inode number of this entry */ |
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__fs16 d_reclen; /* length of this entry */ |
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union { |
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__fs16 d_namlen; /* actual length of d_name */ |
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struct { |
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__u8 d_type; /* file type */ |
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__u8 d_namlen; /* length of string in d_name */ |
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} d_44; |
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} d_u; |
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__u8 d_name[UFS_MAXNAMLEN + 1]; /* file name */ |
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}; |
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struct ufs_csum { |
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__fs32 cs_ndir; /* number of directories */ |
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__fs32 cs_nbfree; /* number of free blocks */ |
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__fs32 cs_nifree; /* number of free inodes */ |
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__fs32 cs_nffree; /* number of free frags */ |
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}; |
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struct ufs2_csum_total { |
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__fs64 cs_ndir; /* number of directories */ |
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__fs64 cs_nbfree; /* number of free blocks */ |
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__fs64 cs_nifree; /* number of free inodes */ |
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__fs64 cs_nffree; /* number of free frags */ |
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__fs64 cs_numclusters; /* number of free clusters */ |
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__fs64 cs_spare[3]; /* future expansion */ |
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}; |
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struct ufs_csum_core { |
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__u64 cs_ndir; /* number of directories */ |
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__u64 cs_nbfree; /* number of free blocks */ |
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__u64 cs_nifree; /* number of free inodes */ |
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__u64 cs_nffree; /* number of free frags */ |
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__u64 cs_numclusters; /* number of free clusters */ |
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}; |
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/* |
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* File system flags |
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*/ |
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#define UFS_UNCLEAN 0x01 /* file system not clean at mount (unused) */ |
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#define UFS_DOSOFTDEP 0x02 /* file system using soft dependencies */ |
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#define UFS_NEEDSFSCK 0x04 /* needs sync fsck (FreeBSD compat, unused) */ |
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#define UFS_INDEXDIRS 0x08 /* kernel supports indexed directories */ |
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#define UFS_ACLS 0x10 /* file system has ACLs enabled */ |
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#define UFS_MULTILABEL 0x20 /* file system is MAC multi-label */ |
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#define UFS_FLAGS_UPDATED 0x80 /* flags have been moved to new location */ |
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#if 0 |
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/* |
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* This is the actual superblock, as it is laid out on the disk. |
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* Do NOT use this structure, because of sizeof(ufs_super_block) > 512 and |
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* it may occupy several blocks, use |
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* struct ufs_super_block_(first,second,third) instead. |
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*/ |
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struct ufs_super_block { |
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union { |
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struct { |
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__fs32 fs_link; /* UNUSED */ |
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} fs_42; |
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struct { |
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__fs32 fs_state; /* file system state flag */ |
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} fs_sun; |
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} fs_u0; |
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__fs32 fs_rlink; /* UNUSED */ |
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__fs32 fs_sblkno; /* addr of super-block in filesys */ |
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__fs32 fs_cblkno; /* offset of cyl-block in filesys */ |
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__fs32 fs_iblkno; /* offset of inode-blocks in filesys */ |
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__fs32 fs_dblkno; /* offset of first data after cg */ |
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__fs32 fs_cgoffset; /* cylinder group offset in cylinder */ |
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__fs32 fs_cgmask; /* used to calc mod fs_ntrak */ |
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__fs32 fs_time; /* last time written -- time_t */ |
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__fs32 fs_size; /* number of blocks in fs */ |
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__fs32 fs_dsize; /* number of data blocks in fs */ |
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__fs32 fs_ncg; /* number of cylinder groups */ |
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__fs32 fs_bsize; /* size of basic blocks in fs */ |
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__fs32 fs_fsize; /* size of frag blocks in fs */ |
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__fs32 fs_frag; /* number of frags in a block in fs */ |
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/* these are configuration parameters */ |
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__fs32 fs_minfree; /* minimum percentage of free blocks */ |
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__fs32 fs_rotdelay; /* num of ms for optimal next block */ |
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__fs32 fs_rps; /* disk revolutions per second */ |
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/* these fields can be computed from the others */ |
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__fs32 fs_bmask; /* ``blkoff'' calc of blk offsets */ |
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__fs32 fs_fmask; /* ``fragoff'' calc of frag offsets */ |
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__fs32 fs_bshift; /* ``lblkno'' calc of logical blkno */ |
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__fs32 fs_fshift; /* ``numfrags'' calc number of frags */ |
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/* these are configuration parameters */ |
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__fs32 fs_maxcontig; /* max number of contiguous blks */ |
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__fs32 fs_maxbpg; /* max number of blks per cyl group */ |
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/* these fields can be computed from the others */ |
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__fs32 fs_fragshift; /* block to frag shift */ |
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__fs32 fs_fsbtodb; /* fsbtodb and dbtofsb shift constant */ |
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__fs32 fs_sbsize; /* actual size of super block */ |
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__fs32 fs_csmask; /* csum block offset */ |
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__fs32 fs_csshift; /* csum block number */ |
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__fs32 fs_nindir; /* value of NINDIR */ |
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__fs32 fs_inopb; /* value of INOPB */ |
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__fs32 fs_nspf; /* value of NSPF */ |
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/* yet another configuration parameter */ |
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__fs32 fs_optim; /* optimization preference, see below */ |
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/* these fields are derived from the hardware */ |
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union { |
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struct { |
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__fs32 fs_npsect; /* # sectors/track including spares */ |
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} fs_sun; |
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struct { |
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__fs32 fs_state; /* file system state time stamp */ |
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} fs_sunx86; |
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} fs_u1; |
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__fs32 fs_interleave; /* hardware sector interleave */ |
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__fs32 fs_trackskew; /* sector 0 skew, per track */ |
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/* a unique id for this filesystem (currently unused and unmaintained) */ |
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/* In 4.3 Tahoe this space is used by fs_headswitch and fs_trkseek */ |
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/* Neither of those fields is used in the Tahoe code right now but */ |
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/* there could be problems if they are. */ |
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__fs32 fs_id[2]; /* file system id */ |
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/* sizes determined by number of cylinder groups and their sizes */ |
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__fs32 fs_csaddr; /* blk addr of cyl grp summary area */ |
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__fs32 fs_cssize; /* size of cyl grp summary area */ |
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__fs32 fs_cgsize; /* cylinder group size */ |
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/* these fields are derived from the hardware */ |
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__fs32 fs_ntrak; /* tracks per cylinder */ |
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__fs32 fs_nsect; /* sectors per track */ |
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__fs32 fs_spc; /* sectors per cylinder */ |
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/* this comes from the disk driver partitioning */ |
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__fs32 fs_ncyl; /* cylinders in file system */ |
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/* these fields can be computed from the others */ |
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__fs32 fs_cpg; /* cylinders per group */ |
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__fs32 fs_ipg; /* inodes per cylinder group */ |
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__fs32 fs_fpg; /* blocks per group * fs_frag */ |
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/* this data must be re-computed after crashes */ |
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struct ufs_csum fs_cstotal; /* cylinder summary information */ |
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/* these fields are cleared at mount time */ |
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__s8 fs_fmod; /* super block modified flag */ |
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__s8 fs_clean; /* file system is clean flag */ |
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__s8 fs_ronly; /* mounted read-only flag */ |
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__s8 fs_flags; |
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union { |
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struct { |
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__s8 fs_fsmnt[UFS_MAXMNTLEN];/* name mounted on */ |
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__fs32 fs_cgrotor; /* last cg searched */ |
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__fs32 fs_csp[UFS_MAXCSBUFS];/*list of fs_cs info buffers */ |
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__fs32 fs_maxcluster; |
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__fs32 fs_cpc; /* cyl per cycle in postbl */ |
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__fs16 fs_opostbl[16][8]; /* old rotation block list head */ |
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} fs_u1; |
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struct { |
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__s8 fs_fsmnt[UFS2_MAXMNTLEN]; /* name mounted on */ |
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__u8 fs_volname[UFS2_MAXVOLLEN]; /* volume name */ |
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__fs64 fs_swuid; /* system-wide uid */ |
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__fs32 fs_pad; /* due to alignment of fs_swuid */ |
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__fs32 fs_cgrotor; /* last cg searched */ |
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__fs32 fs_ocsp[UFS2_NOCSPTRS]; /*list of fs_cs info buffers */ |
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__fs32 fs_contigdirs;/*# of contiguously allocated dirs */ |
|
__fs32 fs_csp; /* cg summary info buffer for fs_cs */ |
|
__fs32 fs_maxcluster; |
|
__fs32 fs_active;/* used by snapshots to track fs */ |
|
__fs32 fs_old_cpc; /* cyl per cycle in postbl */ |
|
__fs32 fs_maxbsize;/*maximum blocking factor permitted */ |
|
__fs64 fs_sparecon64[17];/*old rotation block list head */ |
|
__fs64 fs_sblockloc; /* byte offset of standard superblock */ |
|
struct ufs2_csum_total fs_cstotal;/*cylinder summary information*/ |
|
struct ufs_timeval fs_time; /* last time written */ |
|
__fs64 fs_size; /* number of blocks in fs */ |
|
__fs64 fs_dsize; /* number of data blocks in fs */ |
|
__fs64 fs_csaddr; /* blk addr of cyl grp summary area */ |
|
__fs64 fs_pendingblocks;/* blocks in process of being freed */ |
|
__fs32 fs_pendinginodes;/*inodes in process of being freed */ |
|
} fs_u2; |
|
} fs_u11; |
|
union { |
|
struct { |
|
__fs32 fs_sparecon[53];/* reserved for future constants */ |
|
__fs32 fs_reclaim; |
|
__fs32 fs_sparecon2[1]; |
|
__fs32 fs_state; /* file system state time stamp */ |
|
__fs32 fs_qbmask[2]; /* ~usb_bmask */ |
|
__fs32 fs_qfmask[2]; /* ~usb_fmask */ |
|
} fs_sun; |
|
struct { |
|
__fs32 fs_sparecon[53];/* reserved for future constants */ |
|
__fs32 fs_reclaim; |
|
__fs32 fs_sparecon2[1]; |
|
__fs32 fs_npsect; /* # sectors/track including spares */ |
|
__fs32 fs_qbmask[2]; /* ~usb_bmask */ |
|
__fs32 fs_qfmask[2]; /* ~usb_fmask */ |
|
} fs_sunx86; |
|
struct { |
|
__fs32 fs_sparecon[50];/* reserved for future constants */ |
|
__fs32 fs_contigsumsize;/* size of cluster summary array */ |
|
__fs32 fs_maxsymlinklen;/* max length of an internal symlink */ |
|
__fs32 fs_inodefmt; /* format of on-disk inodes */ |
|
__fs32 fs_maxfilesize[2]; /* max representable file size */ |
|
__fs32 fs_qbmask[2]; /* ~usb_bmask */ |
|
__fs32 fs_qfmask[2]; /* ~usb_fmask */ |
|
__fs32 fs_state; /* file system state time stamp */ |
|
} fs_44; |
|
} fs_u2; |
|
__fs32 fs_postblformat; /* format of positional layout tables */ |
|
__fs32 fs_nrpos; /* number of rotational positions */ |
|
__fs32 fs_postbloff; /* (__s16) rotation block list head */ |
|
__fs32 fs_rotbloff; /* (__u8) blocks for each rotation */ |
|
__fs32 fs_magic; /* magic number */ |
|
__u8 fs_space[1]; /* list of blocks for each rotation */ |
|
}; |
|
#endif/*struct ufs_super_block*/ |
|
|
|
/* |
|
* Preference for optimization. |
|
*/ |
|
#define UFS_OPTTIME 0 /* minimize allocation time */ |
|
#define UFS_OPTSPACE 1 /* minimize disk fragmentation */ |
|
|
|
/* |
|
* Rotational layout table format types |
|
*/ |
|
#define UFS_42POSTBLFMT -1 /* 4.2BSD rotational table format */ |
|
#define UFS_DYNAMICPOSTBLFMT 1 /* dynamic rotational table format */ |
|
|
|
/* |
|
* Convert cylinder group to base address of its global summary info. |
|
*/ |
|
#define fs_cs(indx) s_csp[(indx)] |
|
|
|
/* |
|
* Cylinder group block for a file system. |
|
* |
|
* Writable fields in the cylinder group are protected by the associated |
|
* super block lock fs->fs_lock. |
|
*/ |
|
#define CG_MAGIC 0x090255 |
|
#define ufs_cg_chkmagic(sb, ucg) \ |
|
(fs32_to_cpu((sb), (ucg)->cg_magic) == CG_MAGIC) |
|
/* |
|
* Macros for access to old cylinder group array structures |
|
*/ |
|
#define ufs_ocg_blktot(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_btot) |
|
#define ufs_ocg_blks(sb, ucg, cylno) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_b[cylno]) |
|
#define ufs_ocg_inosused(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_iused) |
|
#define ufs_ocg_blksfree(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_free) |
|
#define ufs_ocg_chkmagic(sb, ucg) \ |
|
(fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_magic) == CG_MAGIC) |
|
|
|
/* |
|
* size of this structure is 172 B |
|
*/ |
|
struct ufs_cylinder_group { |
|
__fs32 cg_link; /* linked list of cyl groups */ |
|
__fs32 cg_magic; /* magic number */ |
|
__fs32 cg_time; /* time last written */ |
|
__fs32 cg_cgx; /* we are the cgx'th cylinder group */ |
|
__fs16 cg_ncyl; /* number of cyl's this cg */ |
|
__fs16 cg_niblk; /* number of inode blocks this cg */ |
|
__fs32 cg_ndblk; /* number of data blocks this cg */ |
|
struct ufs_csum cg_cs; /* cylinder summary information */ |
|
__fs32 cg_rotor; /* position of last used block */ |
|
__fs32 cg_frotor; /* position of last used frag */ |
|
__fs32 cg_irotor; /* position of last used inode */ |
|
__fs32 cg_frsum[UFS_MAXFRAG]; /* counts of available frags */ |
|
__fs32 cg_btotoff; /* (__u32) block totals per cylinder */ |
|
__fs32 cg_boff; /* (short) free block positions */ |
|
__fs32 cg_iusedoff; /* (char) used inode map */ |
|
__fs32 cg_freeoff; /* (u_char) free block map */ |
|
__fs32 cg_nextfreeoff; /* (u_char) next available space */ |
|
union { |
|
struct { |
|
__fs32 cg_clustersumoff; /* (u_int32) counts of avail clusters */ |
|
__fs32 cg_clusteroff; /* (u_int8) free cluster map */ |
|
__fs32 cg_nclusterblks; /* number of clusters this cg */ |
|
__fs32 cg_sparecon[13]; /* reserved for future use */ |
|
} cg_44; |
|
struct { |
|
__fs32 cg_clustersumoff;/* (u_int32) counts of avail clusters */ |
|
__fs32 cg_clusteroff; /* (u_int8) free cluster map */ |
|
__fs32 cg_nclusterblks;/* number of clusters this cg */ |
|
__fs32 cg_niblk; /* number of inode blocks this cg */ |
|
__fs32 cg_initediblk; /* last initialized inode */ |
|
__fs32 cg_sparecon32[3];/* reserved for future use */ |
|
__fs64 cg_time; /* time last written */ |
|
__fs64 cg_sparecon[3]; /* reserved for future use */ |
|
} cg_u2; |
|
__fs32 cg_sparecon[16]; /* reserved for future use */ |
|
} cg_u; |
|
__u8 cg_space[1]; /* space for cylinder group maps */ |
|
/* actually longer */ |
|
}; |
|
|
|
/* Historic Cylinder group info */ |
|
struct ufs_old_cylinder_group { |
|
__fs32 cg_link; /* linked list of cyl groups */ |
|
__fs32 cg_rlink; /* for incore cyl groups */ |
|
__fs32 cg_time; /* time last written */ |
|
__fs32 cg_cgx; /* we are the cgx'th cylinder group */ |
|
__fs16 cg_ncyl; /* number of cyl's this cg */ |
|
__fs16 cg_niblk; /* number of inode blocks this cg */ |
|
__fs32 cg_ndblk; /* number of data blocks this cg */ |
|
struct ufs_csum cg_cs; /* cylinder summary information */ |
|
__fs32 cg_rotor; /* position of last used block */ |
|
__fs32 cg_frotor; /* position of last used frag */ |
|
__fs32 cg_irotor; /* position of last used inode */ |
|
__fs32 cg_frsum[8]; /* counts of available frags */ |
|
__fs32 cg_btot[32]; /* block totals per cylinder */ |
|
__fs16 cg_b[32][8]; /* positions of free blocks */ |
|
__u8 cg_iused[256]; /* used inode map */ |
|
__fs32 cg_magic; /* magic number */ |
|
__u8 cg_free[1]; /* free block map */ |
|
/* actually longer */ |
|
}; |
|
|
|
/* |
|
* structure of an on-disk inode |
|
*/ |
|
struct ufs_inode { |
|
__fs16 ui_mode; /* 0x0 */ |
|
__fs16 ui_nlink; /* 0x2 */ |
|
union { |
|
struct { |
|
__fs16 ui_suid; /* 0x4 */ |
|
__fs16 ui_sgid; /* 0x6 */ |
|
} oldids; |
|
__fs32 ui_inumber; /* 0x4 lsf: inode number */ |
|
__fs32 ui_author; /* 0x4 GNU HURD: author */ |
|
} ui_u1; |
|
__fs64 ui_size; /* 0x8 */ |
|
struct ufs_timeval ui_atime; /* 0x10 access */ |
|
struct ufs_timeval ui_mtime; /* 0x18 modification */ |
|
struct ufs_timeval ui_ctime; /* 0x20 creation */ |
|
union { |
|
struct { |
|
__fs32 ui_db[UFS_NDADDR];/* 0x28 data blocks */ |
|
__fs32 ui_ib[UFS_NINDIR];/* 0x58 indirect blocks */ |
|
} ui_addr; |
|
__u8 ui_symlink[4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */ |
|
} ui_u2; |
|
__fs32 ui_flags; /* 0x64 immutable, append-only... */ |
|
__fs32 ui_blocks; /* 0x68 blocks in use */ |
|
__fs32 ui_gen; /* 0x6c like ext2 i_version, for NFS support */ |
|
union { |
|
struct { |
|
__fs32 ui_shadow; /* 0x70 shadow inode with security data */ |
|
__fs32 ui_uid; /* 0x74 long EFT version of uid */ |
|
__fs32 ui_gid; /* 0x78 long EFT version of gid */ |
|
__fs32 ui_oeftflag; /* 0x7c reserved */ |
|
} ui_sun; |
|
struct { |
|
__fs32 ui_uid; /* 0x70 File owner */ |
|
__fs32 ui_gid; /* 0x74 File group */ |
|
__fs32 ui_spare[2]; /* 0x78 reserved */ |
|
} ui_44; |
|
struct { |
|
__fs32 ui_uid; /* 0x70 */ |
|
__fs32 ui_gid; /* 0x74 */ |
|
__fs16 ui_modeh; /* 0x78 mode high bits */ |
|
__fs16 ui_spare; /* 0x7A unused */ |
|
__fs32 ui_trans; /* 0x7c filesystem translator */ |
|
} ui_hurd; |
|
} ui_u3; |
|
}; |
|
|
|
#define UFS_NXADDR 2 /* External addresses in inode. */ |
|
struct ufs2_inode { |
|
__fs16 ui_mode; /* 0: IFMT, permissions; see below. */ |
|
__fs16 ui_nlink; /* 2: File link count. */ |
|
__fs32 ui_uid; /* 4: File owner. */ |
|
__fs32 ui_gid; /* 8: File group. */ |
|
__fs32 ui_blksize; /* 12: Inode blocksize. */ |
|
__fs64 ui_size; /* 16: File byte count. */ |
|
__fs64 ui_blocks; /* 24: Bytes actually held. */ |
|
__fs64 ui_atime; /* 32: Last access time. */ |
|
__fs64 ui_mtime; /* 40: Last modified time. */ |
|
__fs64 ui_ctime; /* 48: Last inode change time. */ |
|
__fs64 ui_birthtime; /* 56: Inode creation time. */ |
|
__fs32 ui_mtimensec; /* 64: Last modified time. */ |
|
__fs32 ui_atimensec; /* 68: Last access time. */ |
|
__fs32 ui_ctimensec; /* 72: Last inode change time. */ |
|
__fs32 ui_birthnsec; /* 76: Inode creation time. */ |
|
__fs32 ui_gen; /* 80: Generation number. */ |
|
__fs32 ui_kernflags; /* 84: Kernel flags. */ |
|
__fs32 ui_flags; /* 88: Status flags (chflags). */ |
|
__fs32 ui_extsize; /* 92: External attributes block. */ |
|
__fs64 ui_extb[UFS_NXADDR];/* 96: External attributes block. */ |
|
union { |
|
struct { |
|
__fs64 ui_db[UFS_NDADDR]; /* 112: Direct disk blocks. */ |
|
__fs64 ui_ib[UFS_NINDIR];/* 208: Indirect disk blocks.*/ |
|
} ui_addr; |
|
__u8 ui_symlink[2*4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */ |
|
} ui_u2; |
|
__fs64 ui_spare[3]; /* 232: Reserved; currently unused */ |
|
}; |
|
|
|
|
|
/* FreeBSD has these in sys/stat.h */ |
|
/* ui_flags that can be set by a file owner */ |
|
#define UFS_UF_SETTABLE 0x0000ffff |
|
#define UFS_UF_NODUMP 0x00000001 /* do not dump */ |
|
#define UFS_UF_IMMUTABLE 0x00000002 /* immutable (can't "change") */ |
|
#define UFS_UF_APPEND 0x00000004 /* append-only */ |
|
#define UFS_UF_OPAQUE 0x00000008 /* directory is opaque (unionfs) */ |
|
#define UFS_UF_NOUNLINK 0x00000010 /* can't be removed or renamed */ |
|
/* ui_flags that only root can set */ |
|
#define UFS_SF_SETTABLE 0xffff0000 |
|
#define UFS_SF_ARCHIVED 0x00010000 /* archived */ |
|
#define UFS_SF_IMMUTABLE 0x00020000 /* immutable (can't "change") */ |
|
#define UFS_SF_APPEND 0x00040000 /* append-only */ |
|
#define UFS_SF_NOUNLINK 0x00100000 /* can't be removed or renamed */ |
|
|
|
/* |
|
* This structure is used for reading disk structures larger |
|
* than the size of fragment. |
|
*/ |
|
struct ufs_buffer_head { |
|
__u64 fragment; /* first fragment */ |
|
__u64 count; /* number of fragments */ |
|
struct buffer_head * bh[UFS_MAXFRAG]; /* buffers */ |
|
}; |
|
|
|
struct ufs_cg_private_info { |
|
struct ufs_buffer_head c_ubh; |
|
__u32 c_cgx; /* number of cylidner group */ |
|
__u16 c_ncyl; /* number of cyl's this cg */ |
|
__u16 c_niblk; /* number of inode blocks this cg */ |
|
__u32 c_ndblk; /* number of data blocks this cg */ |
|
__u32 c_rotor; /* position of last used block */ |
|
__u32 c_frotor; /* position of last used frag */ |
|
__u32 c_irotor; /* position of last used inode */ |
|
__u32 c_btotoff; /* (__u32) block totals per cylinder */ |
|
__u32 c_boff; /* (short) free block positions */ |
|
__u32 c_iusedoff; /* (char) used inode map */ |
|
__u32 c_freeoff; /* (u_char) free block map */ |
|
__u32 c_nextfreeoff; /* (u_char) next available space */ |
|
__u32 c_clustersumoff;/* (u_int32) counts of avail clusters */ |
|
__u32 c_clusteroff; /* (u_int8) free cluster map */ |
|
__u32 c_nclusterblks; /* number of clusters this cg */ |
|
}; |
|
|
|
|
|
struct ufs_sb_private_info { |
|
struct ufs_buffer_head s_ubh; /* buffer containing super block */ |
|
struct ufs_csum_core cs_total; |
|
__u32 s_sblkno; /* offset of super-blocks in filesys */ |
|
__u32 s_cblkno; /* offset of cg-block in filesys */ |
|
__u32 s_iblkno; /* offset of inode-blocks in filesys */ |
|
__u32 s_dblkno; /* offset of first data after cg */ |
|
__u32 s_cgoffset; /* cylinder group offset in cylinder */ |
|
__u32 s_cgmask; /* used to calc mod fs_ntrak */ |
|
__u64 s_size; /* number of blocks (fragments) in fs */ |
|
__u64 s_dsize; /* number of data blocks in fs */ |
|
__u32 s_ncg; /* number of cylinder groups */ |
|
__u32 s_bsize; /* size of basic blocks */ |
|
__u32 s_fsize; /* size of fragments */ |
|
__u32 s_fpb; /* fragments per block */ |
|
__u32 s_minfree; /* minimum percentage of free blocks */ |
|
__u32 s_bmask; /* `blkoff'' calc of blk offsets */ |
|
__u32 s_fmask; /* s_fsize mask */ |
|
__u32 s_bshift; /* `lblkno'' calc of logical blkno */ |
|
__u32 s_fshift; /* s_fsize shift */ |
|
__u32 s_fpbshift; /* fragments per block shift */ |
|
__u32 s_fsbtodb; /* fsbtodb and dbtofsb shift constant */ |
|
__u32 s_sbsize; /* actual size of super block */ |
|
__u32 s_csmask; /* csum block offset */ |
|
__u32 s_csshift; /* csum block number */ |
|
__u32 s_nindir; /* value of NINDIR */ |
|
__u32 s_inopb; /* value of INOPB */ |
|
__u32 s_nspf; /* value of NSPF */ |
|
__u32 s_npsect; /* # sectors/track including spares */ |
|
__u32 s_interleave; /* hardware sector interleave */ |
|
__u32 s_trackskew; /* sector 0 skew, per track */ |
|
__u64 s_csaddr; /* blk addr of cyl grp summary area */ |
|
__u32 s_cssize; /* size of cyl grp summary area */ |
|
__u32 s_cgsize; /* cylinder group size */ |
|
__u32 s_ntrak; /* tracks per cylinder */ |
|
__u32 s_nsect; /* sectors per track */ |
|
__u32 s_spc; /* sectors per cylinder */ |
|
__u32 s_ipg; /* inodes per cylinder group */ |
|
__u32 s_fpg; /* fragments per group */ |
|
__u32 s_cpc; /* cyl per cycle in postbl */ |
|
__s32 s_contigsumsize;/* size of cluster summary array, 44bsd */ |
|
__s64 s_qbmask; /* ~usb_bmask */ |
|
__s64 s_qfmask; /* ~usb_fmask */ |
|
__s32 s_postblformat; /* format of positional layout tables */ |
|
__s32 s_nrpos; /* number of rotational positions */ |
|
__s32 s_postbloff; /* (__s16) rotation block list head */ |
|
__s32 s_rotbloff; /* (__u8) blocks for each rotation */ |
|
|
|
__u32 s_fpbmask; /* fragments per block mask */ |
|
__u32 s_apb; /* address per block */ |
|
__u32 s_2apb; /* address per block^2 */ |
|
__u32 s_3apb; /* address per block^3 */ |
|
__u32 s_apbmask; /* address per block mask */ |
|
__u32 s_apbshift; /* address per block shift */ |
|
__u32 s_2apbshift; /* address per block shift * 2 */ |
|
__u32 s_3apbshift; /* address per block shift * 3 */ |
|
__u32 s_nspfshift; /* number of sector per fragment shift */ |
|
__u32 s_nspb; /* number of sector per block */ |
|
__u32 s_inopf; /* inodes per fragment */ |
|
__u32 s_sbbase; /* offset of NeXTstep superblock */ |
|
__u32 s_bpf; /* bits per fragment */ |
|
__u32 s_bpfshift; /* bits per fragment shift*/ |
|
__u32 s_bpfmask; /* bits per fragment mask */ |
|
|
|
__u32 s_maxsymlinklen;/* upper limit on fast symlinks' size */ |
|
__s32 fs_magic; /* filesystem magic */ |
|
unsigned int s_dirblksize; |
|
__u64 s_root_blocks; |
|
__u64 s_time_to_space; |
|
__u64 s_space_to_time; |
|
}; |
|
|
|
/* |
|
* Sizes of this structures are: |
|
* ufs_super_block_first 512 |
|
* ufs_super_block_second 512 |
|
* ufs_super_block_third 356 |
|
*/ |
|
struct ufs_super_block_first { |
|
union { |
|
struct { |
|
__fs32 fs_link; /* UNUSED */ |
|
} fs_42; |
|
struct { |
|
__fs32 fs_state; /* file system state flag */ |
|
} fs_sun; |
|
} fs_u0; |
|
__fs32 fs_rlink; |
|
__fs32 fs_sblkno; |
|
__fs32 fs_cblkno; |
|
__fs32 fs_iblkno; |
|
__fs32 fs_dblkno; |
|
__fs32 fs_cgoffset; |
|
__fs32 fs_cgmask; |
|
__fs32 fs_time; |
|
__fs32 fs_size; |
|
__fs32 fs_dsize; |
|
__fs32 fs_ncg; |
|
__fs32 fs_bsize; |
|
__fs32 fs_fsize; |
|
__fs32 fs_frag; |
|
__fs32 fs_minfree; |
|
__fs32 fs_rotdelay; |
|
__fs32 fs_rps; |
|
__fs32 fs_bmask; |
|
__fs32 fs_fmask; |
|
__fs32 fs_bshift; |
|
__fs32 fs_fshift; |
|
__fs32 fs_maxcontig; |
|
__fs32 fs_maxbpg; |
|
__fs32 fs_fragshift; |
|
__fs32 fs_fsbtodb; |
|
__fs32 fs_sbsize; |
|
__fs32 fs_csmask; |
|
__fs32 fs_csshift; |
|
__fs32 fs_nindir; |
|
__fs32 fs_inopb; |
|
__fs32 fs_nspf; |
|
__fs32 fs_optim; |
|
union { |
|
struct { |
|
__fs32 fs_npsect; |
|
} fs_sun; |
|
struct { |
|
__fs32 fs_state; |
|
} fs_sunx86; |
|
} fs_u1; |
|
__fs32 fs_interleave; |
|
__fs32 fs_trackskew; |
|
__fs32 fs_id[2]; |
|
__fs32 fs_csaddr; |
|
__fs32 fs_cssize; |
|
__fs32 fs_cgsize; |
|
__fs32 fs_ntrak; |
|
__fs32 fs_nsect; |
|
__fs32 fs_spc; |
|
__fs32 fs_ncyl; |
|
__fs32 fs_cpg; |
|
__fs32 fs_ipg; |
|
__fs32 fs_fpg; |
|
struct ufs_csum fs_cstotal; |
|
__s8 fs_fmod; |
|
__s8 fs_clean; |
|
__s8 fs_ronly; |
|
__s8 fs_flags; |
|
__s8 fs_fsmnt[UFS_MAXMNTLEN - 212]; |
|
|
|
}; |
|
|
|
struct ufs_super_block_second { |
|
union { |
|
struct { |
|
__s8 fs_fsmnt[212]; |
|
__fs32 fs_cgrotor; |
|
__fs32 fs_csp[UFS_MAXCSBUFS]; |
|
__fs32 fs_maxcluster; |
|
__fs32 fs_cpc; |
|
__fs16 fs_opostbl[82]; |
|
} fs_u1; |
|
struct { |
|
__s8 fs_fsmnt[UFS2_MAXMNTLEN - UFS_MAXMNTLEN + 212]; |
|
__u8 fs_volname[UFS2_MAXVOLLEN]; |
|
__fs64 fs_swuid; |
|
__fs32 fs_pad; |
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__fs32 fs_cgrotor; |
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__fs32 fs_ocsp[UFS2_NOCSPTRS]; |
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__fs32 fs_contigdirs; |
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__fs32 fs_csp; |
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__fs32 fs_maxcluster; |
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__fs32 fs_active; |
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__fs32 fs_old_cpc; |
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__fs32 fs_maxbsize; |
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__fs64 fs_sparecon64[17]; |
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__fs64 fs_sblockloc; |
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__fs64 cs_ndir; |
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__fs64 cs_nbfree; |
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} fs_u2; |
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} fs_un; |
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}; |
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struct ufs_super_block_third { |
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union { |
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struct { |
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__fs16 fs_opostbl[46]; |
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} fs_u1; |
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struct { |
|
__fs64 cs_nifree; /* number of free inodes */ |
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__fs64 cs_nffree; /* number of free frags */ |
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__fs64 cs_numclusters; /* number of free clusters */ |
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__fs64 cs_spare[3]; /* future expansion */ |
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struct ufs_timeval fs_time; /* last time written */ |
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__fs64 fs_size; /* number of blocks in fs */ |
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__fs64 fs_dsize; /* number of data blocks in fs */ |
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__fs64 fs_csaddr; /* blk addr of cyl grp summary area */ |
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__fs64 fs_pendingblocks;/* blocks in process of being freed */ |
|
__fs32 fs_pendinginodes;/*inodes in process of being freed */ |
|
} __attribute__ ((packed)) fs_u2; |
|
} fs_un1; |
|
union { |
|
struct { |
|
__fs32 fs_sparecon[53];/* reserved for future constants */ |
|
__fs32 fs_reclaim; |
|
__fs32 fs_sparecon2[1]; |
|
__fs32 fs_state; /* file system state time stamp */ |
|
__fs32 fs_qbmask[2]; /* ~usb_bmask */ |
|
__fs32 fs_qfmask[2]; /* ~usb_fmask */ |
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} fs_sun; |
|
struct { |
|
__fs32 fs_sparecon[53];/* reserved for future constants */ |
|
__fs32 fs_reclaim; |
|
__fs32 fs_sparecon2[1]; |
|
__fs32 fs_npsect; /* # sectors/track including spares */ |
|
__fs32 fs_qbmask[2]; /* ~usb_bmask */ |
|
__fs32 fs_qfmask[2]; /* ~usb_fmask */ |
|
} fs_sunx86; |
|
struct { |
|
__fs32 fs_sparecon[50];/* reserved for future constants */ |
|
__fs32 fs_contigsumsize;/* size of cluster summary array */ |
|
__fs32 fs_maxsymlinklen;/* max length of an internal symlink */ |
|
__fs32 fs_inodefmt; /* format of on-disk inodes */ |
|
__fs32 fs_maxfilesize[2]; /* max representable file size */ |
|
__fs32 fs_qbmask[2]; /* ~usb_bmask */ |
|
__fs32 fs_qfmask[2]; /* ~usb_fmask */ |
|
__fs32 fs_state; /* file system state time stamp */ |
|
} fs_44; |
|
} fs_un2; |
|
__fs32 fs_postblformat; |
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__fs32 fs_nrpos; |
|
__fs32 fs_postbloff; |
|
__fs32 fs_rotbloff; |
|
__fs32 fs_magic; |
|
__u8 fs_space[1]; |
|
}; |
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|
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#endif /* __LINUX_UFS_FS_H */
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