185 lines
6.3 KiB
C
185 lines
6.3 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/fs.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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#ifdef EXT2FS_DEBUG
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void
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ext2_print_inode(struct inode *in)
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{
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int i;
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struct ext4_extent_header *ehp;
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struct ext4_extent *ep;
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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 acl: 0x%llx\n",
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"n/a", in->i_mode, in->i_flags, in->i_gen, in->i_facl);
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printf("User: %5u Group: %5u Size: %ju\n",
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in->i_uid, in->i_gid, (uintmax_t)in->i_size);
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printf("Links: %3d Blockcount: %ju\n",
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in->i_nlink, (uintmax_t)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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if (E2DI_HAS_XTIME(in))
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printf("crtime %#x ", in->i_birthtime);
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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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printf("Extents:\n");
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ehp = (struct ext4_extent_header *)in->i_db;
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printf("Header (magic 0x%x entries %d max %d depth %d gen %d)\n",
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ehp->eh_magic, ehp->eh_ecount, ehp->eh_max, ehp->eh_depth,
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ehp->eh_gen);
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ep = (struct ext4_extent *)(char *)(ehp + 1);
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printf("Index (blk %d len %d start_lo %d start_hi %d)\n", ep->e_blk,
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ep->e_len, ep->e_start_lo, ep->e_start_hi);
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printf("\n");
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}
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#endif /* EXT2FS_DEBUG */
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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(struct ext2fs_dinode *ei, 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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/*
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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 by
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* setting i_mode to zero - why ? I can see that this might lead to
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* 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_flag |= (ei->e2di_flags & EXT3_INDEX) ? IN_E3INDEX : 0;
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ip->i_flag |= (ei->e2di_flags & EXT4_EXTENTS) ? IN_E4EXTENTS : 0;
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ip->i_blocks = ei->e2di_nblock;
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ip->i_facl = ei->e2di_facl;
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if (E2DI_HAS_HUGE_FILE(ip)) {
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ip->i_blocks |= (uint64_t)ei->e2di_nblock_high << 32;
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ip->i_facl |= (uint64_t)ei->e2di_facl_high << 32;
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if (ei->e2di_flags & EXT4_HUGE_FILE)
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ip->i_blocks = fsbtodb(ip->i_e2fs, ip->i_blocks);
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}
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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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ip->i_uid |= (uint32_t)ei->e2di_uid_high << 16;
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ip->i_gid |= (uint32_t)ei->e2di_gid_high << 16;
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for (i = 0; i < EXT2_NDADDR; i++)
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ip->i_db[i] = ei->e2di_blocks[i];
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for (i = 0; i < EXT2_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(struct inode *ip, 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 has been
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* 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 = 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_flags |= (ip->i_flag & IN_E3INDEX) ? EXT3_INDEX : 0;
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ei->e2di_flags |= (ip->i_flag & IN_E4EXTENTS) ? EXT4_EXTENTS : 0;
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ei->e2di_nblock = ip->i_blocks & 0xffffffff;
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ei->e2di_nblock_high = ip->i_blocks >> 32 & 0xffff;
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ei->e2di_facl = ip->i_facl & 0xffffffff;
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ei->e2di_facl_high = ip->i_facl >> 32 & 0xffff;
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ei->e2di_gen = ip->i_gen;
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ei->e2di_uid = ip->i_uid & 0xffff;
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ei->e2di_uid_high = ip->i_uid >> 16 & 0xffff;
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ei->e2di_gid = ip->i_gid & 0xffff;
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ei->e2di_gid_high = ip->i_gid >> 16 & 0xffff;
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for (i = 0; i < EXT2_NDADDR; i++)
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ei->e2di_blocks[i] = ip->i_db[i];
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for (i = 0; i < EXT2_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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