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nfsd: filter readdir results in V4ROOT case
[safe/jmp/linux-2.6]
/
kernel
/
relay.c
diff --git
a/kernel/relay.c
b/kernel/relay.c
index
09ac200
..
760c262
100644
(file)
--- a/
kernel/relay.c
+++ b/
kernel/relay.c
@@
-60,7
+60,7
@@
static int relay_buf_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
/*
* vm_ops for relay file mappings.
*/
/*
* vm_ops for relay file mappings.
*/
-static struct vm_operations_struct relay_file_mmap_ops = {
+static
const
struct vm_operations_struct relay_file_mmap_ops = {
.fault = relay_buf_fault,
.close = relay_file_mmap_close,
};
.fault = relay_buf_fault,
.close = relay_file_mmap_close,
};
@@
-663,8
+663,10
@@
int relay_late_setup_files(struct rchan *chan,
mutex_lock(&relay_channels_mutex);
/* Is chan already set up? */
mutex_lock(&relay_channels_mutex);
/* Is chan already set up? */
- if (unlikely(chan->has_base_filename))
+ if (unlikely(chan->has_base_filename)) {
+ mutex_unlock(&relay_channels_mutex);
return -EEXIST;
return -EEXIST;
+ }
chan->has_base_filename = 1;
chan->parent = parent;
curr_cpu = get_cpu();
chan->has_base_filename = 1;
chan->parent = parent;
curr_cpu = get_cpu();
@@
-675,9
+677,7
@@
int relay_late_setup_files(struct rchan *chan,
*/
for_each_online_cpu(i) {
if (unlikely(!chan->buf[i])) {
*/
for_each_online_cpu(i) {
if (unlikely(!chan->buf[i])) {
- printk(KERN_ERR "relay_late_setup_files: CPU %u "
- "has no buffer, it must have!\n", i);
- BUG();
+ WARN_ONCE(1, KERN_ERR "CPU has no buffer!\n");
err = -EINVAL;
break;
}
err = -EINVAL;
break;
}
@@
-748,7
+748,7
@@
size_t relay_switch_subbuf(struct rchan_buf *buf, size_t length)
* from the scheduler (trying to re-grab
* rq->lock), so defer it.
*/
* from the scheduler (trying to re-grab
* rq->lock), so defer it.
*/
-
__
mod_timer(&buf->timer, jiffies + 1);
+ mod_timer(&buf->timer, jiffies + 1);
}
old = buf->data;
}
old = buf->data;
@@
-795,13
+795,15
@@
void relay_subbufs_consumed(struct rchan *chan,
if (!chan)
return;
if (!chan)
return;
- if (cpu >= NR_CPUS || !chan->buf[cpu])
+ if (cpu >= NR_CPUS || !chan->buf[cpu] ||
+ subbufs_consumed > chan->n_subbufs)
return;
buf = chan->buf[cpu];
return;
buf = chan->buf[cpu];
- buf->subbufs_consumed += subbufs_consumed;
- if (buf->subbufs_consumed > buf->subbufs_produced)
+ if (subbufs_consumed > buf->subbufs_produced - buf->subbufs_consumed)
buf->subbufs_consumed = buf->subbufs_produced;
buf->subbufs_consumed = buf->subbufs_produced;
+ else
+ buf->subbufs_consumed += subbufs_consumed;
}
EXPORT_SYMBOL_GPL(relay_subbufs_consumed);
}
EXPORT_SYMBOL_GPL(relay_subbufs_consumed);