Differential D23259 Diff 67027 sys/fs/ext2fs/ext2_inode_cnv.c

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sys/fs/ext2fs/ext2_inode_cnv.c

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SDT_PROVIDER_DECLARE(ext2fs);		SDT_PROVIDER_DECLARE(ext2fs);
/*		/*
* ext2fs trace probe:		* ext2fs trace probe:
* arg0: verbosity. Higher numbers give more verbose messages		* arg0: verbosity. Higher numbers give more verbose messages
* arg1: Textual message		* arg1: Textual message
*/		*/
SDT_PROBE_DEFINE2(ext2fs, , trace, inode_cnv, "int", "char*");		SDT_PROBE_DEFINE2(ext2fs, , trace, inode_cnv, "int", "char*");

#define XTIME_TO_NSEC(x) ((x & EXT3_NSEC_MASK) >> 2)
#define NSEC_TO_XTIME(t) (le32toh(t << 2) & EXT3_NSEC_MASK)

#ifdef EXT2FS_PRINT_EXTENTS		#ifdef EXT2FS_PRINT_EXTENTS
void		void
ext2_print_inode(struct inode *in)		ext2_print_inode(struct inode *in)
{		{
int i;		int i;
struct ext4_extent_header *ehp;		struct ext4_extent_header *ehp;
struct ext4_extent *ep;		struct ext4_extent *ep;

Show All 26 Lines	if (in->i_flag & IN_E4EXTENTS) {
printf("BLOCKS:");		printf("BLOCKS:");
for (i = 0; i < (in->i_blocks <= 24 ? (in->i_blocks + 1) / 2 : 12); i++)		for (i = 0; i < (in->i_blocks <= 24 ? (in->i_blocks + 1) / 2 : 12); i++)
printf(" %d", in->i_db[i]);		printf(" %d", in->i_db[i]);
printf("\n");		printf("\n");
}		}
}		}
#endif /* EXT2FS_PRINT_EXTENTS */		#endif /* EXT2FS_PRINT_EXTENTS */


		#define XTIME_TO_NSEC(x) ((le32toh(x) & EXT3_NSEC_MASK) >> 2)

/*		/*
* raw ext2 inode to inode		* raw ext2 inode LE to host inode conversion
*/		*/
int		int
ext2_ei2i(struct ext2fs_dinode ei, struct inode ip)		ext2_ei2i(struct ext2fs_dinode ei, struct inode ip)
{		{
struct m_ext2fs *fs = ip->i_e2fs;		struct m_ext2fs *fs = ip->i_e2fs;
		uint32_t ei_flags_le;
		uint16_t ei_extra_isize_le;
		int i;

if ((ip->i_number < EXT2_FIRST_INO(fs) && ip->i_number != EXT2_ROOTINO) \|\|		if ((ip->i_number < EXT2_FIRST_INO(fs) && ip->i_number != EXT2_ROOTINO) \|\|
(ip->i_number < EXT2_ROOTINO) \|\|		(ip->i_number < EXT2_ROOTINO) \|\|
(ip->i_number > fs->e2fs->e2fs_icount)) {		(ip->i_number > fs->e2fs->e2fs_icount)) {
SDT_PROBE2(ext2fs, , trace, inode_cnv, 1, "bad inode number");		SDT_PROBE2(ext2fs, , trace, inode_cnv, 1, "bad inode number");
return (EINVAL);		return (EINVAL);
}		}

if (ip->i_number == EXT2_ROOTINO && ei->e2di_nlink == 0) {		ip->i_nlink = le16toh(ei->e2di_nlink);
		if (ip->i_number == EXT2_ROOTINO && ip->i_nlink == 0) {
SDT_PROBE2(ext2fs, , trace, inode_cnv, 1, "root inode unallocated");		SDT_PROBE2(ext2fs, , trace, inode_cnv, 1, "root inode unallocated");
return (EINVAL);		return (EINVAL);
}		}
ip->i_nlink = ei->e2di_nlink;

/* Check extra inode size */		/* Check extra inode size */
		ei_extra_isize_le = le16toh(ei->e2di_extra_isize);
if (EXT2_INODE_SIZE(fs) > E2FS_REV0_INODE_SIZE) {		if (EXT2_INODE_SIZE(fs) > E2FS_REV0_INODE_SIZE) {
if (E2FS_REV0_INODE_SIZE + ei->e2di_extra_isize >		if (E2FS_REV0_INODE_SIZE + ei_extra_isize_le >
EXT2_INODE_SIZE(fs) \|\| (ei->e2di_extra_isize & 3)) {		EXT2_INODE_SIZE(fs) \|\| (ei_extra_isize_le & 3)) {
SDT_PROBE2(ext2fs, , trace, inode_cnv, 1,		SDT_PROBE2(ext2fs, , trace, inode_cnv, 1,
"bad extra inode size");		"bad extra inode size");
return (EINVAL);		return (EINVAL);
}		}
}		}

/*		/*
* Godmar thinks - if the link count is zero, then the inode is		* Godmar thinks - if the link count is zero, then the inode is
* unused - according to ext2 standards. Ufs marks this fact by		* unused - according to ext2 standards. Ufs marks this fact by
* setting i_mode to zero - why ? I can see that this might lead to		* setting i_mode to zero - why ? I can see that this might lead to
* problems in an undelete.		* problems in an undelete.
*/		*/
ip->i_mode = ei->e2di_nlink ? ei->e2di_mode : 0;		ip->i_mode = ip->i_nlink ? le16toh(ei->e2di_mode) : 0;
ip->i_size = ei->e2di_size;		ip->i_size = le32toh(ei->e2di_size);
if (S_ISREG(ip->i_mode))		if (S_ISREG(ip->i_mode))
ip->i_size \|= ((u_int64_t)ei->e2di_size_high) << 32;		ip->i_size \|= le64toh(ei->e2di_size_high) << 32;
ip->i_atime = ei->e2di_atime;		ip->i_atime = le32toh(ei->e2di_atime);
ip->i_mtime = ei->e2di_mtime;		ip->i_mtime = le32toh(ei->e2di_mtime);
ip->i_ctime = ei->e2di_ctime;		ip->i_ctime = le32toh(ei->e2di_ctime);
if (E2DI_HAS_XTIME(ip)) {		if (E2DI_HAS_XTIME(ip)) {
ip->i_atimensec = XTIME_TO_NSEC(ei->e2di_atime_extra);		ip->i_atimensec = XTIME_TO_NSEC(ei->e2di_atime_extra);
ip->i_mtimensec = XTIME_TO_NSEC(ei->e2di_mtime_extra);		ip->i_mtimensec = XTIME_TO_NSEC(ei->e2di_mtime_extra);
ip->i_ctimensec = XTIME_TO_NSEC(ei->e2di_ctime_extra);		ip->i_ctimensec = XTIME_TO_NSEC(ei->e2di_ctime_extra);
ip->i_birthtime = ei->e2di_crtime;		ip->i_birthtime = le32toh(ei->e2di_crtime);
ip->i_birthnsec = XTIME_TO_NSEC(ei->e2di_crtime_extra);		ip->i_birthnsec = XTIME_TO_NSEC(ei->e2di_crtime_extra);
}		}
ip->i_flags = 0;		ip->i_flags = 0;
ip->i_flags \|= (ei->e2di_flags & EXT2_APPEND) ? SF_APPEND : 0;		ei_flags_le = le32toh(ei->e2di_flags);
ip->i_flags \|= (ei->e2di_flags & EXT2_IMMUTABLE) ? SF_IMMUTABLE : 0;		ip->i_flags \|= (ei_flags_le & EXT2_APPEND) ? SF_APPEND : 0;
ip->i_flags \|= (ei->e2di_flags & EXT2_NODUMP) ? UF_NODUMP : 0;		ip->i_flags \|= (ei_flags_le & EXT2_IMMUTABLE) ? SF_IMMUTABLE : 0;
ip->i_flag \|= (ei->e2di_flags & EXT3_INDEX) ? IN_E3INDEX : 0;		ip->i_flags \|= (ei_flags_le & EXT2_NODUMP) ? UF_NODUMP : 0;
ip->i_flag \|= (ei->e2di_flags & EXT4_EXTENTS) ? IN_E4EXTENTS : 0;		ip->i_flag \|= (ei_flags_le & EXT3_INDEX) ? IN_E3INDEX : 0;
ip->i_blocks = ei->e2di_nblock;		ip->i_flag \|= (ei_flags_le & EXT4_EXTENTS) ? IN_E4EXTENTS : 0;
ip->i_facl = ei->e2di_facl;		ip->i_blocks = le32toh(ei->e2di_nblock);
		ip->i_facl = le32toh(ei->e2di_facl);
if (E2DI_HAS_HUGE_FILE(ip)) {		if (E2DI_HAS_HUGE_FILE(ip)) {
ip->i_blocks \|= (uint64_t)ei->e2di_nblock_high << 32;		ip->i_blocks \|= (uint64_t)le16toh(ei->e2di_nblock_high) << 32;
ip->i_facl \|= (uint64_t)ei->e2di_facl_high << 32;		ip->i_facl \|= (uint64_t)le16toh(ei->e2di_facl_high) << 32;
if (ei->e2di_flags & EXT4_HUGE_FILE)		if (ei_flags_le & EXT4_HUGE_FILE)
ip->i_blocks = fsbtodb(ip->i_e2fs, ip->i_blocks);		ip->i_blocks = fsbtodb(ip->i_e2fs, ip->i_blocks);
}		}
ip->i_gen = ei->e2di_gen;		ip->i_gen = le32toh(ei->e2di_gen);
ip->i_uid = ei->e2di_uid;		ip->i_uid = le16toh(ei->e2di_uid);
ip->i_gid = ei->e2di_gid;		ip->i_gid = le16toh(ei->e2di_gid);
ip->i_uid \|= (uint32_t)ei->e2di_uid_high << 16;		ip->i_uid \|= (uint32_t)le16toh(ei->e2di_uid_high) << 16;
ip->i_gid \|= (uint32_t)ei->e2di_gid_high << 16;		ip->i_gid \|= (uint32_t)le16toh(ei->e2di_gid_high) << 16;

memcpy(ip->i_data, ei->e2di_blocks, sizeof(ei->e2di_blocks));		for (i = 0; i < EXT2_NDADDR; i++)
		ip->i_db[i] = le32toh(ei->e2di_blocks[i]);
		for (i = 0; i < EXT2_NIADDR; i++)
		ip->i_ib[i] = le32toh(ei->e2di_blocks[EXT2_NDIR_BLOCKS + i]);

/* Verify inode csum. */		/* Verify inode csum. */
return (ext2_ei_csum_verify(ip, ei));		return (ext2_ei_csum_verify(ip, ei));
}		}

		#define NSEC_TO_XTIME(t) (htole32((t << 2) & EXT3_NSEC_MASK))

/*		/*
* inode to raw ext2 inode		* inode to raw ext2 LE inode conversion
*/		*/
int		int
ext2_i2ei(struct inode ip, struct ext2fs_dinode ei)		ext2_i2ei(struct inode ip, struct ext2fs_dinode ei)
{		{
struct m_ext2fs *fs;		struct m_ext2fs *fs;
		int i;

fs = ip->i_e2fs;		fs = ip->i_e2fs;
ei->e2di_mode = ip->i_mode;		ei->e2di_mode = htole16(ip->i_mode);
ei->e2di_nlink = ip->i_nlink;		ei->e2di_nlink = htole16(ip->i_nlink);
		ei->e2di_size = htole32(ip->i_size);
		if (S_ISREG(ip->i_mode))
		ei->e2di_size_high = htole32(ip->i_size >> 32);
		ei->e2di_atime = htole32(ip->i_atime);
		ei->e2di_mtime = htole32(ip->i_mtime);
		ei->e2di_ctime = htole32(ip->i_ctime);
/*		/*
* Godmar thinks: if dtime is nonzero, ext2 says this inode has been		* Godmar thinks: if dtime is nonzero, ext2 says this inode has been
* deleted, this would correspond to a zero link count		* deleted, this would correspond to a zero link count
*/		*/
ei->e2di_dtime = ei->e2di_nlink ? 0 : ip->i_mtime;		ei->e2di_dtime = ei->e2di_nlink ? 0 : ei->e2di_mtime;
ei->e2di_size = ip->i_size;
if (S_ISREG(ip->i_mode))
ei->e2di_size_high = ip->i_size >> 32;
ei->e2di_atime = ip->i_atime;
ei->e2di_mtime = ip->i_mtime;
ei->e2di_ctime = ip->i_ctime;
if (E2DI_HAS_XTIME(ip)) {		if (E2DI_HAS_XTIME(ip)) {
ei->e2di_ctime_extra = NSEC_TO_XTIME(ip->i_ctimensec);		ei->e2di_ctime_extra = NSEC_TO_XTIME(ip->i_ctimensec);
ei->e2di_mtime_extra = NSEC_TO_XTIME(ip->i_mtimensec);		ei->e2di_mtime_extra = NSEC_TO_XTIME(ip->i_mtimensec);
ei->e2di_atime_extra = NSEC_TO_XTIME(ip->i_atimensec);		ei->e2di_atime_extra = NSEC_TO_XTIME(ip->i_atimensec);
ei->e2di_crtime = ip->i_birthtime;		ei->e2di_crtime = htole32(ip->i_birthtime);
ei->e2di_crtime_extra = NSEC_TO_XTIME(ip->i_birthnsec);		ei->e2di_crtime_extra = NSEC_TO_XTIME(ip->i_birthnsec);
}		}
		/* Keep these in host endian for a while since they change a lot */
ei->e2di_flags = 0;		ei->e2di_flags = 0;
ei->e2di_flags \|= (ip->i_flags & SF_APPEND) ? EXT2_APPEND : 0;		ei->e2di_flags \|= (ip->i_flags & SF_APPEND) ? EXT2_APPEND : 0;
ei->e2di_flags \|= (ip->i_flags & SF_IMMUTABLE) ? EXT2_IMMUTABLE : 0;		ei->e2di_flags \|= (ip->i_flags & SF_IMMUTABLE) ? EXT2_IMMUTABLE : 0;
ei->e2di_flags \|= (ip->i_flags & UF_NODUMP) ? EXT2_NODUMP : 0;		ei->e2di_flags \|= (ip->i_flags & UF_NODUMP) ? EXT2_NODUMP : 0;
ei->e2di_flags \|= (ip->i_flag & IN_E3INDEX) ? EXT3_INDEX : 0;		ei->e2di_flags \|= (ip->i_flag & IN_E3INDEX) ? EXT3_INDEX : 0;
ei->e2di_flags \|= (ip->i_flag & IN_E4EXTENTS) ? EXT4_EXTENTS : 0;		ei->e2di_flags \|= (ip->i_flag & IN_E4EXTENTS) ? EXT4_EXTENTS : 0;
if (ip->i_blocks > ~0U &&		if (ip->i_blocks > ~0U &&
!EXT2_HAS_RO_COMPAT_FEATURE(fs, EXT2F_ROCOMPAT_HUGE_FILE)) {		!EXT2_HAS_RO_COMPAT_FEATURE(fs, EXT2F_ROCOMPAT_HUGE_FILE)) {
SDT_PROBE2(ext2fs, , trace, inode_cnv, 1, "i_blocks value is out of range");		SDT_PROBE2(ext2fs, , trace, inode_cnv, 1, "i_blocks value is out of range");
return (EIO);		return (EIO);
}		}
if (ip->i_blocks <= 0xffffffffffffULL) {		if (ip->i_blocks <= 0xffffffffffffULL) {
ei->e2di_nblock = ip->i_blocks & 0xffffffff;		ei->e2di_nblock = ip->i_blocks & 0xffffffff;
ei->e2di_nblock_high = ip->i_blocks >> 32 & 0xffff;		ei->e2di_nblock_high = ip->i_blocks >> 32 & 0xffff;
} else {		} else {
ei->e2di_flags \|= EXT4_HUGE_FILE;		ei->e2di_flags \|= EXT4_HUGE_FILE;
ei->e2di_nblock = dbtofsb(fs, ip->i_blocks);		ei->e2di_nblock = dbtofsb(fs, ip->i_blocks);
ei->e2di_nblock_high = dbtofsb(fs, ip->i_blocks) >> 32 & 0xffff;		ei->e2di_nblock_high = dbtofsb(fs, ip->i_blocks) >> 32 & 0xffff;
}		}
ei->e2di_facl = ip->i_facl & 0xffffffff;		/* Catch up with the conversion */
ei->e2di_facl_high = ip->i_facl >> 32 & 0xffff;		ei->e2di_flags = htole32(ei->e2di_flags);
ei->e2di_gen = ip->i_gen;		ei->e2di_nblock = htole32(ei->e2di_nblock);
ei->e2di_uid = ip->i_uid & 0xffff;		ei->e2di_nblock_high = htole16(ei->e2di_nblock_high);
ei->e2di_uid_high = ip->i_uid >> 16 & 0xffff;
ei->e2di_gid = ip->i_gid & 0xffff;
ei->e2di_gid_high = ip->i_gid >> 16 & 0xffff;

memcpy(ei->e2di_blocks, ip->i_data, sizeof(ei->e2di_blocks));		ei->e2di_facl = htole32(ip->i_facl & 0xffffffff);
		ei->e2di_facl_high = htole16(ip->i_facl >> 32 & 0xffff);
		ei->e2di_gen = htole32(ip->i_gen);
		ei->e2di_uid = htole16(ip->i_uid & 0xffff);
		ei->e2di_uid_high = htole16(ip->i_uid >> 16 & 0xffff);
		ei->e2di_gid = htole16(ip->i_gid & 0xffff);
		ei->e2di_gid_high = htole16(ip->i_gid >> 16 & 0xffff);

		for (i = 0; i < EXT2_NDADDR; i++)
		ei->e2di_blocks[i] = htole32(ip->i_db[i]);
		for (i = 0; i < EXT2_NIADDR; i++)
		ei->e2di_blocks[EXT2_NDIR_BLOCKS + i] = htole32(ip->i_ib[i]);

/* Set inode csum. */		/* Set inode csum. */
ext2_ei_csum_set(ip, ei);		ext2_ei_csum_set(ip, ei);

return (0);		return (0);
}		}