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Fix ntfs such that it understand media with a non-512-bytes sector size:

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1. Fixups are always done on 512 byte chunks (in stead of sectors). This
is kind of stupid.
2. Conevrt between NTFS blocknumbers (the blocksize equals the media
sector size) and the bread() and getblk() blocknr (which are 512-byte
sized)

NB: this change should not affect ntfs for 512-byte sector sizes.
This commit is contained in:
Guido van Rooij 2009-12-07 15:15:08 +00:00
parent 58a0206d63
commit c53a28102a
3 changed files with 15 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
sys/fs/ntfs/ntfs.h
View File

@ -183,6 +183,7 @@ struct attr_indexentry {
};
#define NTFS_FILEMAGIC (u_int32_t)(0x454C4946)
#define NTFS_BLOCK_SIZE 512
#define NTFS_FRFLAG_DIR 0x0002
struct filerec {
struct fixuphdr fr_fixup;
@ -257,6 +258,7 @@ struct ntfsmount {
char ** ntm_u28; /* Unicode to 8 bit */
void * ntm_ic_l2u; /* Local to Unicode (iconv) */
void * ntm_ic_u2l; /* Unicode to Local (iconv) */
u_int8_t ntm_multiplier; /* NTFS blockno to DEV_BSIZE sectorno */
};
#define ntm_mftcn ntm_bootfile.bf_mftcn

18
sys/fs/ntfs/ntfs_subr.c
View File

@ -278,6 +278,7 @@ ntfs_loadntnode(
bn = ntfs_cntobn(ntmp->ntm_mftcn) +
ntmp->ntm_bpmftrec * ip->i_number;
bn *= ntmp->ntm_multiplier;
error = bread(ntmp->ntm_devvp,
bn, ntfs_bntob(ntmp->ntm_bpmftrec),
@ -581,7 +582,7 @@ ntfs_attrtontvattr(
memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff,
rap->a_r.a_datalen);
}
ddprintf((", len: %d", vap->va_datalen));
ddprintf((", len: %lld", vap->va_datalen));
if (error)
free(vap, M_NTFSNTVATTR);
@ -1491,11 +1492,13 @@ ntfs_writentvattr_plain(
(u_int32_t) left));
if ((off == 0) && (tocopy == ntfs_cntob(cl)))
{
bp = getblk(ntmp->ntm_devvp, ntfs_cntobn(cn),
bp = getblk(ntmp->ntm_devvp, ntfs_cntobn(cn)
* ntmp->ntm_multiplier,
ntfs_cntob(cl), 0, 0, 0);
clrbuf(bp);
} else {
error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn),
error = bread(ntmp->ntm_devvp, ntfs_cntobn(cn)
* ntmp->ntm_multiplier,
ntfs_cntob(cl), NOCRED, &bp);
if (error) {
brelse(bp);
@ -1602,7 +1605,8 @@ ntfs_readntvattr_plain(
(u_int32_t) tocopy,
(u_int32_t) left));
error = bread(ntmp->ntm_devvp,
ntfs_cntobn(cn),
ntfs_cntobn(cn)
* ntmp->ntm_multiplier,
ntfs_cntob(cl),
NOCRED, &bp);
if (error) {
@ -1878,7 +1882,7 @@ ntfs_procfixups(
fhp->fh_magic, magic);
return (EINVAL);
}
if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) {
if ((fhp->fh_fnum - 1) * NTFS_BLOCK_SIZE != len) {
printf("ntfs_procfixups: " \
"bad fixups number: %d for %ld bytes block\n",
fhp->fh_fnum, (long)len); /* XXX printf kludge */
@ -1889,7 +1893,7 @@ ntfs_procfixups(
return (EINVAL);
}
fxp = (u_int16_t *) (buf + fhp->fh_foff);
cfxp = (u_int16_t *) (buf + ntmp->ntm_bps - 2);
cfxp = (u_int16_t *) (buf + NTFS_BLOCK_SIZE - 2);
fixup = *fxp++;
for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
if (*cfxp != fixup) {
@ -1897,7 +1901,7 @@ ntfs_procfixups(
return (EINVAL);
}
*cfxp = *fxp;
cfxp = (u_int16_t *) ((caddr_t) cfxp + ntmp->ntm_bps);
cfxp = (u_int16_t *) ((caddr_t) cfxp + NTFS_BLOCK_SIZE);
}
return (0);
}

2
sys/fs/ntfs/ntfs_vfsops.c
View File

@ -316,6 +316,8 @@ ntfs_mountfs(devvp, mp, td)
else
ntmp->ntm_bpmftrec = (1 << (-cpr)) / ntmp->ntm_bps;
}
ntmp->ntm_multiplier = ntmp->ntm_bps / DEV_BSIZE;
dprintf(("ntfs_mountfs(): bps: %d, spc: %d, media: %x, mftrecsz: %d (%d sects)\n",
ntmp->ntm_bps,ntmp->ntm_spc,ntmp->ntm_bootfile.bf_media,
ntmp->ntm_mftrecsz,ntmp->ntm_bpmftrec));