comparison: tun/tun.patch
tun/tun.patch
- changeset 87
- 7cedea33cc19
- child 667
- 9dacbd1d1aa2
equal
deleted
inserted
replaced
| -1:000000000000 | 0:7677ad56a95b |
|---|---|
| 1 Index: linux/2.2/tun.c | |
| 2 --- linux/2.2/tun.c.orig 2006-10-10 14:45:00.338589000 +0200 | |
| 3 +++ linux/2.2/tun.c 2006-10-10 14:44:05.695404000 +0200 | |
| 4 @@ -178,10 +178,22 @@ | |
| 5 | |
| 6 DBG( KERN_INFO "%s: tun_chr_poll\n", tun->name); | |
| 7 | |
| 8 + /* Data written to the /dev/tunX device is immediately placed into a socket buffer, making it | |
| 9 + * available to networking code at the tunX interface. Writes never block. | |
| 10 + * Likewise, data flows from the network stack, through the tunX interface and into the /dev/tun* device, | |
| 11 + * where it is queued, making it available for read(). | |
| 12 + * Thus the character device /dev/tunX is: | |
| 13 + * - readable if data was "transmitted" to the tunX interface and is now queued at the /dev/tunX device. | |
| 14 + * - always writable. | |
| 15 + * Everything written here is equally true of taps. | |
| 16 + * The author made a mistake when implementing this routine; he forgot that the device is always writable. | |
| 17 + * -jeff stearns 22-Dec-2005 | |
| 18 + */ | |
| 19 + | |
| 20 poll_wait(file, &tun->read_wait, wait); | |
| 21 | |
| 22 if( skb_queue_len(&tun->txq) ) | |
| 23 - return POLLIN | POLLRDNORM; | |
| 24 + return POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM; | |
| 25 | |
| 26 return POLLOUT | POLLWRNORM; | |
| 27 } | |
| 28 Index: linux/2.4/tun.c | |
| 29 --- linux/2.4/tun.c.orig 2006-10-10 14:41:57.910408000 +0200 | |
| 30 +++ linux/2.4/tun.c 2006-10-10 14:43:40.067700000 +0200 | |
| 31 @@ -176,9 +176,21 @@ | |
| 32 DBG(KERN_INFO "%s: tun_chr_poll\n", tun->name); | |
| 33 | |
| 34 poll_wait(file, &tun->read_wait, wait); | |
| 35 + | |
| 36 + /* Data written to the /dev/tunX device is immediately placed into a socket buffer, making it | |
| 37 + * available to networking code at the tunX interface. Writes never block. | |
| 38 + * Likewise, data flows from the network stack, through the tunX interface and into the /dev/tun* device, | |
| 39 + * where it is queued, making it available for read(). | |
| 40 + * Thus the character device /dev/tunX is: | |
| 41 + * - readable if data was "transmitted" to the tunX interface and is now queued at the /dev/tunX device. | |
| 42 + * - always writable. | |
| 43 + * Everything written here is equally true of taps. | |
| 44 + * The author made a mistake when implementing this routine; he forgot that the device is always writable. | |
| 45 + * -jeff stearns 22-Dec-2005 | |
| 46 + */ | |
| 47 | |
| 48 if (skb_queue_len(&tun->txq)) | |
| 49 - return POLLIN | POLLRDNORM; | |
| 50 + return POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM; | |
| 51 | |
| 52 return POLLOUT | POLLWRNORM; | |
| 53 } |
