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Differential D19848 Diff 56242 head/sys/fs/ext2fs/ext2_inode_cnv.c

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head/sys/fs/ext2fs/ext2_inode_cnv.c

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/* /*
* routines to convert on disk ext2 inodes into inodes and back * routines to convert on disk ext2 inodes into inodes and back
*/ */
#include <sys/param.h> #include <sys/param.h>
#include <sys/systm.h> #include <sys/systm.h>
#include <sys/endian.h> #include <sys/endian.h>
#include <sys/lock.h> #include <sys/lock.h>
#include <sys/sdt.h>
#include <sys/stat.h> #include <sys/stat.h>
#include <sys/vnode.h> #include <sys/vnode.h>
#include <fs/ext2fs/fs.h> #include <fs/ext2fs/fs.h>
#include <fs/ext2fs/inode.h> #include <fs/ext2fs/inode.h>
#include <fs/ext2fs/ext2fs.h> #include <fs/ext2fs/ext2fs.h>
#include <fs/ext2fs/ext2_dinode.h> #include <fs/ext2fs/ext2_dinode.h>
#include <fs/ext2fs/ext2_extern.h> #include <fs/ext2fs/ext2_extern.h>
SDT_PROVIDER_DECLARE(ext2fs);
/*
* ext2fs trace probe:
* arg0: verbosity. Higher numbers give more verbose messages
* arg1: Textual message
*/
SDT_PROBE_DEFINE2(ext2fs, , trace, inode_cnv, "int", "char*");
#define XTIME_TO_NSEC(x) ((x & EXT3_NSEC_MASK) >> 2) #define XTIME_TO_NSEC(x) ((x & EXT3_NSEC_MASK) >> 2)
#define NSEC_TO_XTIME(t) (le32toh(t << 2) & EXT3_NSEC_MASK) #define NSEC_TO_XTIME(t) (le32toh(t << 2) & EXT3_NSEC_MASK)
#ifdef EXT2FS_DEBUG #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;
printf("Inode: %5ju", (uintmax_t)in->i_number); printf("Inode: %5ju", (uintmax_t)in->i_number);
Show All 23 Lines if (in->i_flag & IN_E4EXTENTS) {
printf("\n"); printf("\n");
} else { } else {
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_DEBUG */ #endif /* EXT2FS_PRINT_EXTENTS */
/* /*
* raw ext2 inode to inode * raw ext2 inode to inode
*/ */
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;
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)) {
printf("ext2fs: bad inode number %ju\n", ip->i_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) { if (ip->i_number == EXT2_ROOTINO && ei->e2di_nlink == 0) {
printf("ext2fs: root inode unallocated\n"); SDT_PROBE2(ext2fs, , trace, inode_cnv, 1, "root inode unallocated");
return (EINVAL); return (EINVAL);
} }
ip->i_nlink = ei->e2di_nlink; ip->i_nlink = ei->e2di_nlink;
/* Check extra inode size */ /* Check extra inode size */
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->e2di_extra_isize >
EXT2_INODE_SIZE(fs) || (ei->e2di_extra_isize & 3)) { EXT2_INODE_SIZE(fs) || (ei->e2di_extra_isize & 3)) {
printf("ext2fs: bad extra inode size %u, inode size=%u\n", SDT_PROBE2(ext2fs, , trace, inode_cnv, 1,
ei->e2di_extra_isize, EXT2_INODE_SIZE(fs)); "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
▲ Show 20 Lines • Show All 71 Lines • ▼ Show 20 Linesext2_i2ei(struct inode *ip, struct ext2fs_dinode *ei)
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)) {
ext2_fserr(fs, ip->i_uid, "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);
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