34f4388801
Extended attributes and their particular implementation in linux are different from FreeBSD so in this case we have started diverging from the UFS EA implementation, which would be the natural reference. Depending on future progress implementing ACLs this approach may change but for now bring to the tree an implementation that is consistent and can be tested. Submitted by: Fedor Uporov Differential Revision: https://reviews.freebsd.org/D10460
181 lines
6.1 KiB
C
181 lines
6.1 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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/* XXX use memcpy */
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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;
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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 < 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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