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- Lock the buf before inspecting its contents.

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This commit is contained in:
Jeff Roberson 2003-03-13 07:04:11 +00:00
parent 542bd65fcb
commit 619bddc702
1 changed files with 5 additions and 7 deletions
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12
sys/nfsclient/nfs_vnops.c
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@ -2658,18 +2658,16 @@ again:
for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
if (bvecpos >= bvecsize) if (bvecpos >= bvecsize)
break; break;
if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
nbp = TAILQ_NEXT(bp, b_vnbufs);
continue;
}
if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) != if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
(B_DELWRI | B_NEEDCOMMIT)) { (B_DELWRI | B_NEEDCOMMIT)) {
nbp = TAILQ_NEXT(bp, b_vnbufs); nbp = TAILQ_NEXT(bp, b_vnbufs);
continue; continue;
} }
if (BUF_LOCK(bp, VI_UNLOCK(vp);
LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK,
VI_MTX(vp))) {
VI_LOCK(vp);
nbp = TAILQ_NEXT(bp, b_vnbufs);
continue;
}
bremfree(bp); bremfree(bp);
/* /*
* Work out if all buffers are using the same cred * Work out if all buffers are using the same cred