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| author | tjr <tjr@FreeBSD.org> | 2004-02-17 08:51:49 +0000 |
|---|---|---|
| committer | tjr <tjr@FreeBSD.org> | 2004-02-17 08:51:49 +0000 |
| commit | e426f6c0bc27c74a12298323ed13254ab51304e0 (patch) | |
| tree | 1d0a1e68ee4cb16ae396b3067ec41daa18fc04c3 | |
| parent | 55590093d9518557a8233c2e404cde2205c920b3 (diff) | |
| download | FreeBSD-src-e426f6c0bc27c74a12298323ed13254ab51304e0.zip FreeBSD-src-e426f6c0bc27c74a12298323ed13254ab51304e0.tar.gz | |
If the "next free cluster" field of the FSInfo block is 0xFFFFFFFF,
it means that the correct value is unknown. Since this value is just
a hint to improve performance, initially assume that the first non-reserved
cluster is free, then correct this assumption if necessary before writing
the FSInfo block back to disk.
PR: 62826
MFC after: 2 weeks
| -rw-r--r-- | sys/fs/msdosfs/msdosfs_vfsops.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sys/fs/msdosfs/msdosfs_vfsops.c b/sys/fs/msdosfs/msdosfs_vfsops.c index edcdd2e..be56bfc 100644 --- a/sys/fs/msdosfs/msdosfs_vfsops.c +++ b/sys/fs/msdosfs/msdosfs_vfsops.c @@ -561,9 +561,11 @@ mountmsdosfs(devvp, mp, td, argp) if (!bcmp(fp->fsisig1, "RRaA", 4) && !bcmp(fp->fsisig2, "rrAa", 4) && !bcmp(fp->fsisig3, "\0\0\125\252", 4) - && !bcmp(fp->fsisig4, "\0\0\125\252", 4)) + && !bcmp(fp->fsisig4, "\0\0\125\252", 4)) { pmp->pm_nxtfree = getulong(fp->fsinxtfree); - else + if (pmp->pm_nxtfree == 0xffffffff) + pmp->pm_nxtfree = CLUST_FIRST; + } else pmp->pm_fsinfo = 0; brelse(bp); bp = NULL; |
