e28f5d5222
We also try to make better use of the fs flags instead of trying adapt the code according to the fs structures. In the case of subsecond timestamps and birthtime we now check that the feature is explicitly enabled: previously we only checked that the reserved space was available and silently wrote them. This approach is much safer, especially if the filesystem happens to use embedded inodes or support EAs. Discussed with: Zheng Liu MFC after: 5 days
157 lines
4.9 KiB
C
157 lines
4.9 KiB
C
/*-
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* Copyright (c) 1995 The University of Utah and
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* the Computer Systems Laboratory at the University of Utah (CSL).
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* All rights reserved.
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*
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* Permission to use, copy, modify and distribute this software is hereby
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* granted provided that (1) source code retains these copyright, permission,
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* and disclaimer notices, and (2) redistributions including binaries
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* reproduce the notices in supporting documentation, and (3) all advertising
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* materials mentioning features or use of this software display the following
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* acknowledgement: ``This product includes software developed by the
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* Computer Systems Laboratory at the University of Utah.''
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*
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* THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
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* IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
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* ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* CSL requests users of this software to return to csl-dist@cs.utah.edu any
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* improvements that they make and grant CSL redistribution rights.
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*
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* Utah $Hdr$
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* $FreeBSD$
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*/
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/*
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* routines to convert on disk ext2 inodes into inodes and back
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/endian.h>
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#include <sys/lock.h>
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#include <sys/stat.h>
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#include <sys/vnode.h>
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#include <fs/ext2fs/inode.h>
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#include <fs/ext2fs/ext2fs.h>
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#include <fs/ext2fs/ext2_dinode.h>
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#include <fs/ext2fs/ext2_extern.h>
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#define XTIME_TO_NSEC(x) ((x & EXT3_NSEC_MASK) >> 2)
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#define NSEC_TO_XTIME(t) (le32toh(t << 2) & EXT3_NSEC_MASK)
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void
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ext2_print_inode( in )
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struct inode *in;
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{
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int i;
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printf( "Inode: %5ju", (uintmax_t)in->i_number);
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printf( /* "Inode: %5d" */
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" Type: %10s Mode: 0x%o Flags: 0x%x Version: %d\n",
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"n/a", in->i_mode, in->i_flags, in->i_gen);
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printf( "User: %5lu Group: %5lu Size: %lu\n",
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(unsigned long)in->i_uid, (unsigned long)in->i_gid,
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(unsigned long)in->i_size);
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printf( "Links: %3d Blockcount: %d\n",
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in->i_nlink, in->i_blocks);
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printf( "ctime: 0x%x", in->i_ctime);
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printf( "atime: 0x%x", in->i_atime);
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printf( "mtime: 0x%x", in->i_mtime);
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printf( "BLOCKS: ");
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for(i=0; i < (in->i_blocks <= 24 ? ((in->i_blocks+1)/2): 12); i++)
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printf("%d ", in->i_db[i]);
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printf("\n");
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}
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/*
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* raw ext2 inode to inode
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*/
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void
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ext2_ei2i(ei, ip)
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struct ext2fs_dinode *ei;
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struct inode *ip;
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{
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int i;
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ip->i_nlink = ei->e2di_nlink;
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/* Godmar thinks - if the link count is zero, then the inode is
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unused - according to ext2 standards. Ufs marks this fact
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by setting i_mode to zero - why ?
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I can see that this might lead to problems in an undelete.
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*/
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ip->i_mode = ei->e2di_nlink ? ei->e2di_mode : 0;
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ip->i_size = ei->e2di_size;
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if (S_ISREG(ip->i_mode))
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ip->i_size |= ((u_int64_t)ei->e2di_size_high) << 32;
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ip->i_atime = ei->e2di_atime;
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ip->i_mtime = ei->e2di_mtime;
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ip->i_ctime = ei->e2di_ctime;
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if (E2DI_HAS_XTIME(ip)) {
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ip->i_atimensec = XTIME_TO_NSEC(ei->e2di_atime_extra);
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ip->i_mtimensec = XTIME_TO_NSEC(ei->e2di_mtime_extra);
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ip->i_ctimensec = XTIME_TO_NSEC(ei->e2di_ctime_extra);
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ip->i_birthtime = ei->e2di_crtime;
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ip->i_birthnsec = XTIME_TO_NSEC(ei->e2di_crtime_extra);
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}
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ip->i_flags = 0;
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ip->i_flags |= (ei->e2di_flags & EXT2_APPEND) ? SF_APPEND : 0;
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ip->i_flags |= (ei->e2di_flags & EXT2_IMMUTABLE) ? SF_IMMUTABLE : 0;
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ip->i_flags |= (ei->e2di_flags & EXT2_NODUMP) ? UF_NODUMP : 0;
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ip->i_blocks = ei->e2di_nblock;
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ip->i_gen = ei->e2di_gen;
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ip->i_uid = ei->e2di_uid;
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ip->i_gid = ei->e2di_gid;
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/* XXX use memcpy */
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for(i = 0; i < NDADDR; i++)
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ip->i_db[i] = ei->e2di_blocks[i];
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for(i = 0; i < NIADDR; i++)
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ip->i_ib[i] = ei->e2di_blocks[EXT2_NDIR_BLOCKS + i];
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}
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/*
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* inode to raw ext2 inode
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*/
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void
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ext2_i2ei(ip, ei)
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struct inode *ip;
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struct ext2fs_dinode *ei;
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{
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int i;
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ei->e2di_mode = ip->i_mode;
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ei->e2di_nlink = ip->i_nlink;
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/*
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Godmar thinks: if dtime is nonzero, ext2 says this inode
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has been deleted, this would correspond to a zero link count
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*/
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ei->e2di_dtime = ei->e2di_nlink ? 0 : ip->i_mtime;
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ei->e2di_size = ip->i_size;
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if (S_ISREG(ip->i_mode))
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ei->e2di_size_high = ip->i_size >> 32;
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ei->e2di_atime = ip->i_atime;
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ei->e2di_mtime = ip->i_mtime;
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ei->e2di_ctime = ip->i_ctime;
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if (E2DI_HAS_XTIME(ip)) {
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ei->e2di_ctime_extra = NSEC_TO_XTIME(ip->i_ctimensec);
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ei->e2di_mtime_extra = NSEC_TO_XTIME(ip->i_mtimensec);
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ei->e2di_atime_extra = NSEC_TO_XTIME(ip->i_atimensec);
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ei->e2di_crtime = ip->i_birthtime;
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ei->e2di_crtime_extra = NSEC_TO_XTIME(ip->i_birthnsec);
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}
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ei->e2di_flags = ip->i_flags;
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ei->e2di_flags = 0;
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ei->e2di_flags |= (ip->i_flags & SF_APPEND) ? EXT2_APPEND: 0;
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ei->e2di_flags |= (ip->i_flags & SF_IMMUTABLE) ? EXT2_IMMUTABLE: 0;
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ei->e2di_flags |= (ip->i_flags & UF_NODUMP) ? EXT2_NODUMP: 0;
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ei->e2di_nblock = ip->i_blocks;
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ei->e2di_gen = ip->i_gen;
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ei->e2di_uid = ip->i_uid;
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ei->e2di_gid = ip->i_gid;
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/* XXX use memcpy */
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for(i = 0; i < NDADDR; i++)
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ei->e2di_blocks[i] = ip->i_db[i];
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for(i = 0; i < NIADDR; i++)
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ei->e2di_blocks[EXT2_NDIR_BLOCKS + i] = ip->i_ib[i];
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}
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