19642a0cfb
The NSEC_TO_XTIME macro already calls the htole32(), so there is no need to call it twice. This code does nothing on LE platforms and affects only nanosecond and birthtime fields so it's difficult to notice on regular use. X-MFC with: r361136
265 lines
9.0 KiB
C
265 lines
9.0 KiB
C
/*-
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* SPDX-License-Identifier: MIT-CMU
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*
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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/sdt.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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SDT_PROVIDER_DECLARE(ext2fs);
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/*
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* ext2fs trace probe:
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* arg0: verbosity. Higher numbers give more verbose messages
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* arg1: Textual message
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*/
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SDT_PROBE_DEFINE2(ext2fs, , trace, inode_cnv, "int", "char*");
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#ifdef EXT2FS_PRINT_EXTENTS
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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%jx\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\n", in->i_birthtime);
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else
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printf("\n");
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if (in->i_flag & IN_E4EXTENTS) {
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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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le16toh(ehp->eh_magic), le16toh(ehp->eh_ecount),
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le16toh(ehp->eh_max), le16toh(ehp->eh_depth),
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le32toh(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",
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le32toh(ep->e_blk),
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le16toh(ep->e_len), le32toh(ep->e_start_lo),
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le16toh(ep->e_start_hi));
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printf("\n");
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} else {
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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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#endif /* EXT2FS_PRINT_EXTENTS */
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#define XTIME_TO_NSEC(x) ((le32toh(x) & EXT3_NSEC_MASK) >> 2)
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/*
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* raw ext2 inode LE to host inode conversion
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*/
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int
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ext2_ei2i(struct ext2fs_dinode *ei, struct inode *ip)
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{
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struct m_ext2fs *fs = ip->i_e2fs;
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uint32_t ei_flags_host;
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uint16_t ei_extra_isize_le;
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int i;
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if ((ip->i_number < EXT2_FIRST_INO(fs) && ip->i_number != EXT2_ROOTINO) ||
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(ip->i_number < EXT2_ROOTINO) ||
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(ip->i_number > le32toh(fs->e2fs->e2fs_icount))) {
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SDT_PROBE2(ext2fs, , trace, inode_cnv, 1, "bad inode number");
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return (EINVAL);
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}
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ip->i_nlink = le16toh(ei->e2di_nlink);
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if (ip->i_number == EXT2_ROOTINO && ip->i_nlink == 0) {
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SDT_PROBE2(ext2fs, , trace, inode_cnv, 1, "root inode unallocated");
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return (EINVAL);
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}
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/* Check extra inode size */
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ei_extra_isize_le = le16toh(ei->e2di_extra_isize);
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if (EXT2_INODE_SIZE(fs) > E2FS_REV0_INODE_SIZE) {
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if (E2FS_REV0_INODE_SIZE + ei_extra_isize_le >
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EXT2_INODE_SIZE(fs) || (ei_extra_isize_le & 3)) {
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SDT_PROBE2(ext2fs, , trace, inode_cnv, 1,
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"bad extra inode size");
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return (EINVAL);
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}
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}
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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 = ip->i_nlink ? le16toh(ei->e2di_mode) : 0;
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ip->i_size = le32toh(ei->e2di_size);
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if (S_ISREG(ip->i_mode))
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ip->i_size |= (uint64_t)le32toh(ei->e2di_size_high) << 32;
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ip->i_atime = le32toh(ei->e2di_atime);
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ip->i_mtime = le32toh(ei->e2di_mtime);
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ip->i_ctime = le32toh(ei->e2di_ctime);
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if (E2DI_HAS_XTIME(ip)) {
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ip->i_atimensec = XTIME_TO_NSEC(le32toh(ei->e2di_atime_extra));
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ip->i_mtimensec = XTIME_TO_NSEC(le32toh(ei->e2di_mtime_extra));
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ip->i_ctimensec = XTIME_TO_NSEC(le32toh(ei->e2di_ctime_extra));
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ip->i_birthtime = le32toh(ei->e2di_crtime);
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ip->i_birthnsec = XTIME_TO_NSEC(le32toh(ei->e2di_crtime_extra));
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}
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ip->i_flags = 0;
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ei_flags_host = le32toh(ei->e2di_flags);
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ip->i_flags |= (ei_flags_host & EXT2_APPEND) ? SF_APPEND : 0;
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ip->i_flags |= (ei_flags_host & EXT2_IMMUTABLE) ? SF_IMMUTABLE : 0;
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ip->i_flags |= (ei_flags_host & EXT2_NODUMP) ? UF_NODUMP : 0;
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ip->i_flag |= (ei_flags_host & EXT3_INDEX) ? IN_E3INDEX : 0;
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ip->i_flag |= (ei_flags_host & EXT4_EXTENTS) ? IN_E4EXTENTS : 0;
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ip->i_blocks = le32toh(ei->e2di_nblock);
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ip->i_facl = le32toh(ei->e2di_facl);
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if (E2DI_HAS_HUGE_FILE(ip)) {
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ip->i_blocks |= (uint64_t)le16toh(ei->e2di_nblock_high) << 32;
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ip->i_facl |= (uint64_t)le16toh(ei->e2di_facl_high) << 32;
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if (ei_flags_host & 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 = le32toh(ei->e2di_gen);
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ip->i_uid = le16toh(ei->e2di_uid);
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ip->i_gid = le16toh(ei->e2di_gid);
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ip->i_uid |= (uint32_t)le16toh(ei->e2di_uid_high) << 16;
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ip->i_gid |= (uint32_t)le16toh(ei->e2di_gid_high) << 16;
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if ((ip->i_flag & IN_E4EXTENTS)) {
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memcpy(ip->i_data, ei->e2di_blocks, sizeof(ei->e2di_blocks));
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} else {
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for (i = 0; i < EXT2_NDADDR; i++)
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ip->i_db[i] = le32toh(ei->e2di_blocks[i]);
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for (i = 0; i < EXT2_NIADDR; i++)
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ip->i_ib[i] = le32toh(ei->e2di_blocks[EXT2_NDIR_BLOCKS + i]);
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}
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/* Verify inode csum. */
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return (ext2_ei_csum_verify(ip, ei));
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}
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#define NSEC_TO_XTIME(t) (htole32((t << 2) & EXT3_NSEC_MASK))
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/*
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* inode to raw ext2 LE inode conversion
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*/
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int
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ext2_i2ei(struct inode *ip, struct ext2fs_dinode *ei)
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{
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struct m_ext2fs *fs;
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int i;
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fs = ip->i_e2fs;
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ei->e2di_mode = htole16(ip->i_mode);
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ei->e2di_nlink = htole16(ip->i_nlink);
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ei->e2di_size = htole32(ip->i_size);
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if (S_ISREG(ip->i_mode))
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ei->e2di_size_high = htole32(ip->i_size >> 32);
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ei->e2di_atime = htole32(ip->i_atime);
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ei->e2di_mtime = htole32(ip->i_mtime);
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ei->e2di_ctime = htole32(ip->i_ctime);
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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 = htole32(le16toh(ei->e2di_nlink) ? 0 :
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le32toh(ei->e2di_mtime));
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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 = htole32(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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/* Keep these in host endian for a while since they change a lot */
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ei->e2di_flags = 0;
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ei->e2di_flags |= htole32((ip->i_flags & SF_APPEND) ? EXT2_APPEND : 0);
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ei->e2di_flags |= htole32((ip->i_flags & SF_IMMUTABLE) ? EXT2_IMMUTABLE : 0);
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ei->e2di_flags |= htole32((ip->i_flags & UF_NODUMP) ? EXT2_NODUMP : 0);
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ei->e2di_flags |= htole32((ip->i_flag & IN_E3INDEX) ? EXT3_INDEX : 0);
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ei->e2di_flags |= htole32((ip->i_flag & IN_E4EXTENTS) ? EXT4_EXTENTS : 0);
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if (ip->i_blocks > ~0U &&
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!EXT2_HAS_RO_COMPAT_FEATURE(fs, EXT2F_ROCOMPAT_HUGE_FILE)) {
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SDT_PROBE2(ext2fs, , trace, inode_cnv, 1, "i_blocks value is out of range");
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return (EIO);
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}
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if (ip->i_blocks <= 0xffffffffffffULL) {
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ei->e2di_nblock = htole32(ip->i_blocks & 0xffffffff);
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ei->e2di_nblock_high = htole16(ip->i_blocks >> 32 & 0xffff);
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} else {
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ei->e2di_flags |= htole32(EXT4_HUGE_FILE);
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ei->e2di_nblock = htole32(dbtofsb(fs, ip->i_blocks));
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ei->e2di_nblock_high = htole16(dbtofsb(fs, ip->i_blocks) >> 32 & 0xffff);
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}
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ei->e2di_facl = htole32(ip->i_facl & 0xffffffff);
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ei->e2di_facl_high = htole16(ip->i_facl >> 32 & 0xffff);
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ei->e2di_gen = htole32(ip->i_gen);
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ei->e2di_uid = htole16(ip->i_uid & 0xffff);
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ei->e2di_uid_high = htole16(ip->i_uid >> 16 & 0xffff);
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ei->e2di_gid = htole16(ip->i_gid & 0xffff);
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ei->e2di_gid_high = htole16(ip->i_gid >> 16 & 0xffff);
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if ((ip->i_flag & IN_E4EXTENTS)) {
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memcpy(ei->e2di_blocks, ip->i_data, sizeof(ei->e2di_blocks));
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} else {
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for (i = 0; i < EXT2_NDADDR; i++)
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ei->e2di_blocks[i] = htole32(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] = htole32(ip->i_ib[i]);
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}
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/* Set inode csum. */
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ext2_ei_csum_set(ip, ei);
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return (0);
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}
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