Backup FATs were sometimes marked dirty by copying their first block
from the primary FAT, and then they were not marked clean on unmount. Force marking them clean when appropriate. Submitted by: bde MFC after: 1 week
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79fb7dd167
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=246218
@ -321,8 +321,8 @@ updatefats(pmp, bp, fatbn)
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struct buf *bp;
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u_long fatbn;
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{
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int i;
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struct buf *bpn;
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int cleanfat, i;
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#ifdef MSDOSFS_DEBUG
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printf("updatefats(pmp %p, bp %p, fatbn %lu)\n", pmp, bp, fatbn);
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@ -362,12 +362,23 @@ updatefats(pmp, bp, fatbn)
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* filesystem was mounted. If synch is asked for then use
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* bwrite()'s and really slow things down.
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*/
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if (fatbn != pmp->pm_fatblk || FAT12(pmp))
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cleanfat = 0;
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else if (FAT16(pmp))
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cleanfat = 16;
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else
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cleanfat = 32;
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for (i = 1; i < pmp->pm_FATs; i++) {
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fatbn += pmp->pm_FATsecs;
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/* getblk() never fails */
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bpn = getblk(pmp->pm_devvp, fatbn, bp->b_bcount,
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0, 0, 0);
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bcopy(bp->b_data, bpn->b_data, bp->b_bcount);
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/* Force the clean bit on in the other copies. */
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if (cleanfat == 16)
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((u_int8_t *)bpn->b_data)[3] |= 0x80;
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else if (cleanfat == 32)
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((u_int8_t *)bpn->b_data)[7] |= 0x08;
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if (pmp->pm_flags & MSDOSFSMNT_WAITONFAT)
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bwrite(bpn);
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else
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