int
DFlushEntry(afs_int32 *fid)
{
/* Flush pages modified by one entry. */
struct buffer *tb;
int code;
ObtainReadLock(&afs_bufferLock);
for (tb = phTable[pHash(fid)]; tb; tb = tb->hashNext)
if (FidEq(tb->fid, fid) && tb->dirty) {
ObtainWriteLock(&tb->lock);
if (tb->dirty) {
code = ReallyWrite(tb->fid, tb->page, tb->data);
if (code) {
ReleaseWriteLock(&tb->lock);
ReleaseReadLock(&afs_bufferLock);
return code;
}
tb->dirty = 0;
}
ReleaseWriteLock(&tb->lock);
}
ReleaseReadLock(&afs_bufferLock);
return 0;
}
void
DZap(afs_int32 *fid)
{
/* Destroy all buffers pertaining to a particular fid. */
struct buffer *tb;
ObtainReadLock(&afs_bufferLock);
for (tb = phTable[pHash(fid)]; tb; tb = tb->hashNext)
if (FidEq(tb->fid, fid)) {
ObtainWriteLock(&tb->lock);
FidZap(tb->fid);
tb->dirty = 0;
ReleaseWriteLock(&tb->lock);
}
ReleaseReadLock(&afs_bufferLock);
}
void
DZap(dir_file_t dir)
{
/* Destroy all buffers pertaining to a particular fid. */
struct buffer *tb;
ObtainReadLock(&afs_bufferLock);
for (tb = phTable[pHash(dir)]; tb; tb = tb->hashNext)
if (FidEq(bufferDir(tb), dir)) {
ObtainWriteLock(&tb->lock);
FidZap(bufferDir(tb));
tb->dirty = 0;
ReleaseWriteLock(&tb->lock);
}
ReleaseReadLock(&afs_bufferLock);
}