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authorRusty Russell <rusty@rustcorp.com.au>2009-09-24 00:26:31 -0400
committerRusty Russell <rusty@rustcorp.com.au>2009-09-23 08:56:31 -0400
commit3c1b27d5043086a485f8526353ae9fe37bfa1065 (patch)
treee3b6eda3c66bcd1fc3af6e7fa6e4e3af77459474 /include/linux/virtio.h
parentf68d24082e22ccee3077d11aeb6dc5354f0ca7f1 (diff)
virtio: make add_buf return capacity remaining
This API change means that virtio_net can tell how much capacity remains for buffers. It's necessarily fuzzy, since VIRTIO_RING_F_INDIRECT_DESC means we can fit any number of descriptors in one, *if* we can kmalloc. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Dinesh Subhraveti <dineshs@us.ibm.com>
Diffstat (limited to 'include/linux/virtio.h')
-rw-r--r--include/linux/virtio.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index 4fca4f5440ba..057a2e010758 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -34,7 +34,7 @@ struct virtqueue {
34 * out_num: the number of sg readable by other side 34 * out_num: the number of sg readable by other side
35 * in_num: the number of sg which are writable (after readable ones) 35 * in_num: the number of sg which are writable (after readable ones)
36 * data: the token identifying the buffer. 36 * data: the token identifying the buffer.
37 * Returns 0 or an error. 37 * Returns remaining capacity of queue (sg segments) or a negative error.
38 * @kick: update after add_buf 38 * @kick: update after add_buf
39 * vq: the struct virtqueue 39 * vq: the struct virtqueue
40 * After one or more add_buf calls, invoke this to kick the other side. 40 * After one or more add_buf calls, invoke this to kick the other side.