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Update linux-atm fixes to reflect the final upstream pull request

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[juhosg: refresh the patches with quilt]

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 34443
This commit is contained in:
Gabor Juhos 2012-12-02 13:04:04 +00:00
parent 5d8a7a0ce5
commit 890f83dfb3
3 changed files with 833 additions and 260 deletions
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367
target/linux/generic/patches-3.3/131-atm-fixes.patch
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@ -1,4 +1,36 @@
commit 86768086727a60335b08c34b2966c784029a24cf
commit d7d3d8f1ee4435e32bc6c93187798b7e2e3170a9
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Thu Nov 29 23:28:30 2012 +0000
solos-pci: remove list_vccs() debugging function
No idea why we've gone so long dumping a list of VCCs with vci==0 on
every ->open() call...
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit c93967bfd3a3dffa759a3f28370167bf3cdbc3d0
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Thu Nov 29 23:27:20 2012 +0000
solos-pci: use GFP_KERNEL where possible, not GFP_ATOMIC
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit ad6999e17ae4f7b99f6d28f425ae970acb115347
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Thu Nov 29 23:15:30 2012 +0000
solos-pci: clean up pclose() function
- Flush pending TX skbs from the queue rather than waiting for them all to
complete (suggested by Krzysztof Mazur <krzysiek@podlesie.net>).
- Clear ATM_VF_ADDR only when the PKT_PCLOSE packet has been submitted.
- Don't clear ATM_VF_READY at all — vcc_destroy_socket() does that for us.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit 2547e97f29d6d69d567947d5ef90b6b4fbcaf565
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Wed Nov 28 10:15:05 2012 +0000
@ -10,7 +42,7 @@ Date: Wed Nov 28 10:15:05 2012 +0000
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Krzysztof Mazur <krzysiek@podlesie.net>
commit a009aa5fde926350f7a7e558a3ac0180e10eb24a
commit 990b0884a2e9668c08e9daa4d70a54d65329cb6f
Author: Krzysztof Mazur <krzysiek@podlesie.net>
Date: Wed Nov 28 09:08:04 2012 +0100
@ -26,7 +58,7 @@ Date: Wed Nov 28 09:08:04 2012 +0100
Signed-off-by: Krzysztof Mazur <krzysiek@podlesie.net>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit ae2169bcb6375fb214cadd0ea50ac54bcf39b0d6
commit f49b6da01f0abebb17f6241473d53018d923f6b0
Author: Nathan Williams <nathan@traverse.com.au>
Date: Tue Nov 27 17:34:09 2012 +1100
@ -37,7 +69,7 @@ Date: Tue Nov 27 17:34:09 2012 +1100
Signed-off-by: Nathan Williams <nathan@traverse.com.au>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit 6227612becaebe2f9f4ad7d0cdf27e298bb56687
commit a61d37ff4a555886c4ebe31d2c6d893afb6f4d3c
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Wed Nov 28 00:46:45 2012 +0000
@ -52,7 +84,7 @@ Date: Wed Nov 28 00:46:45 2012 +0000
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Krzysztof Mazur <krzysiek@podlesie.net>
commit 44abbb464896dc2270716d25e12fe47e57eeb1d3
commit c52f40629884ddc62c7af445fd5d620fdb466fb2
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Wed Nov 28 00:05:52 2012 +0000
@ -69,11 +101,30 @@ Date: Wed Nov 28 00:05:52 2012 +0000
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Krzysztof Mazur <krzysiek@podlesie.net>
commit c93eeac2ebee497dbc9b6ad39c235ff3061be141
commit 35826e7372fe39b7db7930eda0267c82d68d1a4c
Author: David Woodhouse <dwmw2@infradead.org>
Date: Tue Nov 27 23:28:36 2012 +0000
br2684: don't send frames on not-ready vcc
Avoid submitting packets to a vcc which is being closed. Things go badly
wrong when the ->pop method gets later called after everything's been
torn down.
Use the ATM socket lock for synchronisation with vcc_destroy_socket(),
which clears the ATM_VF_READY bit under the same lock. Otherwise, we
could end up submitting a packet to the device driver even after its
->ops->close method has been called. And it could call the vcc's ->pop
method after the protocol has been shut down. Which leads to a panic.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Krzysztof Mazur <krzysiek@podlesie.net>
commit 7f940dde65de4a707f3dd723bb6ce9de90ca1eab
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Wed Nov 28 00:03:11 2012 +0000
atm: Add release_cb() callback to vcc
atm: add release_cb() callback to vcc
The immediate use case for this is that it will allow us to ensure that a
pppoatm queue is woken after it has to drop a packet due to the sock being
@ -86,24 +137,11 @@ Date: Wed Nov 28 00:03:11 2012 +0000
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Krzysztof Mazur <krzysiek@podlesie.net>
commit 9b3e2e224cc4326d8897243b24d778abf9098a8d
Author: David Woodhouse <dwmw2@infradead.org>
Date: Tue Nov 27 23:28:36 2012 +0000
br2684: don't send frames on not-ready vcc
Avoid submitting packets to a vcc which is being closed. Things go badly
wrong when the ->pop method gets later called after everything's been
torn down.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Krzysztof Mazur <krzysiek@podlesie.net>
commit 26c7c53318cf56a690ae553104f4a60181734fb5
commit def1b2f9083f84d0a77730e537c76429914d17c1
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Tue Nov 27 23:49:24 2012 +0000
solos-pci: Wait for pending TX to complete when releasing vcc
solos-pci: wait for pending TX to complete when releasing vcc
We should no longer be calling the old pop routine for the vcc, after
vcc_release() has completed. Make sure we wait for any pending TX skbs
@ -111,7 +149,7 @@ Date: Tue Nov 27 23:49:24 2012 +0000
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit 1a3304e89b9ba168340a37926014be11c3ad110e
commit 397ff16dce53888ec693b3718640be2560204751
Author: Krzysztof Mazur <krzysiek@podlesie.net>
Date: Tue Nov 6 23:17:02 2012 +0100
@ -129,19 +167,16 @@ Date: Tue Nov 6 23:17:02 2012 +0100
Signed-off-by: Krzysztof Mazur <krzysiek@podlesie.net>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit 294398bcd0fe26335059a185b59cfb5de1fc4c71
commit 071d93931a75dc1f82f0baa9959613af81c5a032
Author: Krzysztof Mazur <krzysiek@podlesie.net>
Date: Sat Nov 10 23:33:19 2012 +0100
pppoatm: drop frames to not-ready vcc
Patches "atm: detach protocol before closing vcc"
and "pppoatm: allow assign only on a connected socket" fixed
common cases where the pppoatm_send() crashes while sending
frame to not-ready vcc. However there are still some other cases
where we can send frames to vcc, which is flagged as ATM_VF_CLOSE
(for instance after vcc_release_async()) or it's opened but not
ready yet.
The vcc_destroy_socket() closes vcc before the protocol is detached
from vcc by calling vcc->push() with NULL skb. This leaves some time
window, where the protocol may call vcc->send() on closed vcc
and crash.
Now pppoatm_send(), like vcc_sendmsg(), checks for vcc flags that
indicate that vcc is not ready. If the vcc is not ready we just
@ -277,8 +312,6 @@ Date: Sun Nov 25 12:06:52 2012 +0000
Reviewed-by: Krzysztof Mazur <krzysiek@podlesie.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/atm/solos-pci.c b/drivers/atm/solos-pci.c
index 9851093..6258961 100644
--- a/drivers/atm/solos-pci.c
+++ b/drivers/atm/solos-pci.c
@@ -92,6 +92,7 @@ struct pkt_hdr {
@ -289,7 +322,15 @@ index 9851093..6258961 100644
struct atm_vcc *vcc;
uint32_t dma_addr;
};
@@ -710,7 +711,8 @@ void solos_bh(unsigned long card_arg)
@@ -164,7 +165,6 @@ static void fpga_queue(struct solos_card
static uint32_t fpga_tx(struct solos_card *);
static irqreturn_t solos_irq(int irq, void *dev_id);
static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
-static int list_vccs(int vci);
static int atm_init(struct solos_card *, struct device *);
static void atm_remove(struct solos_card *);
static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
@@ -710,7 +710,8 @@ void solos_bh(unsigned long card_arg)
dev_warn(&card->dev->dev, "Received packet for unknown VPI.VCI %d.%d on port %d\n",
le16_to_cpu(header->vpi), le16_to_cpu(header->vci),
port);
@ -299,26 +340,119 @@ index 9851093..6258961 100644
}
atm_charge(vcc, skb->truesize);
vcc->push(vcc, skb);
@@ -881,11 +883,18 @@ static void pclose(struct atm_vcc *vcc)
@@ -790,44 +791,6 @@ static struct atm_vcc *find_vcc(struct a
return vcc;
}
-static int list_vccs(int vci)
-{
- struct hlist_head *head;
- struct atm_vcc *vcc;
- struct hlist_node *node;
- struct sock *s;
- int num_found = 0;
- int i;
-
- read_lock(&vcc_sklist_lock);
- if (vci != 0){
- head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
- sk_for_each(s, node, head) {
- num_found ++;
- vcc = atm_sk(s);
- printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
- vcc->dev->number,
- vcc->vpi,
- vcc->vci);
- }
- } else {
- for(i = 0; i < VCC_HTABLE_SIZE; i++){
- head = &vcc_hash[i];
- sk_for_each(s, node, head) {
- num_found ++;
- vcc = atm_sk(s);
- printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
- vcc->dev->number,
- vcc->vpi,
- vcc->vci);
- }
- }
- }
- read_unlock(&vcc_sklist_lock);
- return num_found;
-}
-
-
static int popen(struct atm_vcc *vcc)
{
struct solos_card *card = vcc->dev->dev_data;
@@ -840,7 +803,7 @@ static int popen(struct atm_vcc *vcc)
return -EINVAL;
}
- skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
+ skb = alloc_skb(sizeof(*header), GFP_KERNEL);
if (!skb) {
if (net_ratelimit())
dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
@@ -857,8 +820,6 @@ static int popen(struct atm_vcc *vcc)
set_bit(ATM_VF_ADDR, &vcc->flags);
set_bit(ATM_VF_READY, &vcc->flags);
- list_vccs(0);
-
return 0;
}
@@ -866,10 +827,21 @@ static int popen(struct atm_vcc *vcc)
static void pclose(struct atm_vcc *vcc)
{
struct solos_card *card = vcc->dev->dev_data;
- struct sk_buff *skb;
+ unsigned char port = SOLOS_CHAN(vcc->dev);
+ struct sk_buff *skb, *tmpskb;
struct pkt_hdr *header;
- skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
+ /* Remove any yet-to-be-transmitted packets from the pending queue */
+ spin_lock(&card->tx_queue_lock);
+ skb_queue_walk_safe(&card->tx_queue[port], skb, tmpskb) {
+ if (SKB_CB(skb)->vcc == vcc) {
+ skb_unlink(skb, &card->tx_queue[port]);
+ solos_pop(vcc, skb);
+ }
+ }
+ spin_unlock(&card->tx_queue_lock);
+
+ skb = alloc_skb(sizeof(*header), GFP_KERNEL);
if (!skb) {
dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
return;
@@ -881,15 +853,21 @@ static void pclose(struct atm_vcc *vcc)
header->vci = cpu_to_le16(vcc->vci);
header->type = cpu_to_le16(PKT_PCLOSE);
- fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
+ init_completion(&SKB_CB(skb)->c);
- clear_bit(ATM_VF_ADDR, &vcc->flags);
- clear_bit(ATM_VF_READY, &vcc->flags);
+ fpga_queue(card, port, skb, NULL);
+
fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
clear_bit(ATM_VF_ADDR, &vcc->flags);
clear_bit(ATM_VF_READY, &vcc->flags);
+ if (!wait_for_completion_timeout(&SKB_CB(skb)->c,
+ msecs_to_jiffies(5000)))
+ if (!wait_for_completion_timeout(&SKB_CB(skb)->c, 5 * HZ))
+ dev_warn(&card->dev->dev, "Timeout waiting for VCC close on port %d\n",
+ SOLOS_CHAN(vcc->dev));
+
+ port);
/* Hold up vcc_destroy_socket() (our caller) until solos_bh() in the
tasklet has finished processing any incoming packets (and, more to
the point, using the vcc pointer). */
@@ -1011,9 +1020,12 @@ static uint32_t fpga_tx(struct solos_card *card)
tasklet_unlock_wait(&card->tlet);
+
+ clear_bit(ATM_VF_ADDR, &vcc->flags);
+
return;
}
@@ -1010,9 +988,12 @@ static uint32_t fpga_tx(struct solos_car
if (vcc) {
atomic_inc(&vcc->stats->tx);
solos_pop(vcc, oldskb);
@ -333,7 +467,16 @@ index 9851093..6258961 100644
}
}
/* For non-DMA TX, write the 'TX start' bit for all four ports simultaneously */
@@ -1345,6 +1357,8 @@ static struct pci_driver fpga_driver = {
@@ -1246,7 +1227,7 @@ static int atm_init(struct solos_card *c
card->atmdev[i]->phy_data = (void *)(unsigned long)i;
atm_dev_signal_change(card->atmdev[i], ATM_PHY_SIG_FOUND);
- skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
+ skb = alloc_skb(sizeof(*header), GFP_KERNEL);
if (!skb) {
dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
continue;
@@ -1343,6 +1324,8 @@ static struct pci_driver fpga_driver = {
static int __init solos_pci_init(void)
{
@ -342,11 +485,9 @@ index 9851093..6258961 100644
printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
return pci_register_driver(&fpga_driver);
}
diff --git a/include/linux/atmdev.h b/include/linux/atmdev.h
index 22ef21c..c1da539 100644
--- a/include/linux/atmdev.h
+++ b/include/linux/atmdev.h
@@ -99,6 +99,7 @@ struct atm_vcc {
@@ -307,6 +307,7 @@ struct atm_vcc {
struct atm_dev *dev; /* device back pointer */
struct atm_qos qos; /* QOS */
struct atm_sap sap; /* SAP */
@ -354,7 +495,7 @@ index 22ef21c..c1da539 100644
void (*push)(struct atm_vcc *vcc,struct sk_buff *skb);
void (*pop)(struct atm_vcc *vcc,struct sk_buff *skb); /* optional */
int (*push_oam)(struct atm_vcc *vcc,void *cell);
@@ -106,6 +107,7 @@ struct atm_vcc {
@@ -314,6 +315,7 @@ struct atm_vcc {
void *dev_data; /* per-device data */
void *proto_data; /* per-protocol data */
struct k_atm_aal_stats *stats; /* pointer to AAL stats group */
@ -362,14 +503,13 @@ index 22ef21c..c1da539 100644
/* SVC part --- may move later ------------------------------------- */
short itf; /* interface number */
struct sockaddr_atmsvc local;
diff --git a/net/atm/br2684.c b/net/atm/br2684.c
index 4819d315..a4ee4ad 100644
--- a/net/atm/br2684.c
+++ b/net/atm/br2684.c
@@ -68,12 +68,14 @@ struct br2684_vcc {
@@ -68,12 +68,15 @@ struct br2684_vcc {
/* keep old push, pop functions for chaining */
void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb);
void (*old_pop)(struct atm_vcc *vcc, struct sk_buff *skb);
+ void (*old_release_cb)(struct atm_vcc *vcc);
+ struct module *old_owner;
enum br2684_encaps encaps;
struct list_head brvccs;
@ -381,7 +521,7 @@ index 4819d315..a4ee4ad 100644
};
struct br2684_dev {
@@ -181,18 +183,15 @@ static struct notifier_block atm_dev_notifier = {
@@ -181,18 +184,15 @@ static struct notifier_block atm_dev_not
static void br2684_pop(struct atm_vcc *vcc, struct sk_buff *skb)
{
struct br2684_vcc *brvcc = BR2684_VCC(vcc);
@ -405,18 +545,7 @@ index 4819d315..a4ee4ad 100644
/*
* Send a packet out a particular vcc. Not to useful right now, but paves
* the way for multiple vcc's per itf. Returns true if we can send,
@@ -251,21 +250,30 @@ static int br2684_xmit_vcc(struct sk_buff *skb, struct net_device *dev,
skb_debug(skb);
ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc;
+ if (test_bit(ATM_VF_RELEASED, &atmvcc->flags) ||
+ test_bit(ATM_VF_CLOSE, &atmvcc->flags) ||
+ !test_bit(ATM_VF_READY, &atmvcc->flags)) {
+ dev_kfree_skb(skb);
+ return 0;
+ }
pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev);
atomic_add(skb->truesize, &sk_atm(atmvcc)->sk_wmem_alloc);
@@ -256,16 +256,30 @@ static int br2684_xmit_vcc(struct sk_buf
ATM_SKB(skb)->atm_options = atmvcc->atm_options;
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
@ -439,12 +568,76 @@ index 4819d315..a4ee4ad 100644
+ will wake the queue if appropriate. Just return an error so that
+ the stats are updated correctly */
+ return !atmvcc->send(atmvcc, skb);
+}
+
+static void br2684_release_cb(struct atm_vcc *atmvcc)
+{
+ struct br2684_vcc *brvcc = BR2684_VCC(atmvcc);
+
+ if (atomic_read(&brvcc->qspace) > 0)
+ netif_wake_queue(brvcc->device);
+
+ if (brvcc->old_release_cb)
+ brvcc->old_release_cb(atmvcc);
}
static inline struct br2684_vcc *pick_outgoing_vcc(const struct sk_buff *skb,
@@ -378,8 +386,8 @@ static void br2684_close_vcc(struct br2684_vcc *brvcc)
@@ -279,6 +293,8 @@ static netdev_tx_t br2684_start_xmit(str
{
struct br2684_dev *brdev = BRPRIV(dev);
struct br2684_vcc *brvcc;
+ struct atm_vcc *atmvcc;
+ netdev_tx_t ret = NETDEV_TX_OK;
pr_debug("skb_dst(skb)=%p\n", skb_dst(skb));
read_lock(&devs_lock);
@@ -289,9 +305,26 @@ static netdev_tx_t br2684_start_xmit(str
dev->stats.tx_carrier_errors++;
/* netif_stop_queue(dev); */
dev_kfree_skb(skb);
- read_unlock(&devs_lock);
- return NETDEV_TX_OK;
+ goto out_devs;
}
+ atmvcc = brvcc->atmvcc;
+
+ bh_lock_sock(sk_atm(atmvcc));
+
+ if (test_bit(ATM_VF_RELEASED, &atmvcc->flags) ||
+ test_bit(ATM_VF_CLOSE, &atmvcc->flags) ||
+ !test_bit(ATM_VF_READY, &atmvcc->flags)) {
+ dev->stats.tx_dropped++;
+ dev_kfree_skb(skb);
+ goto out;
+ }
+
+ if (sock_owned_by_user(sk_atm(atmvcc))) {
+ netif_stop_queue(brvcc->device);
+ ret = NETDEV_TX_BUSY;
+ goto out;
+ }
+
if (!br2684_xmit_vcc(skb, dev, brvcc)) {
/*
* We should probably use netif_*_queue() here, but that
@@ -303,8 +336,11 @@ static netdev_tx_t br2684_start_xmit(str
dev->stats.tx_errors++;
dev->stats.tx_fifo_errors++;
}
+ out:
+ bh_unlock_sock(sk_atm(atmvcc));
+ out_devs:
read_unlock(&devs_lock);
- return NETDEV_TX_OK;
+ return ret;
}
/*
@@ -377,9 +413,10 @@ static void br2684_close_vcc(struct br26
list_del(&brvcc->brvccs);
write_unlock_irq(&devs_lock);
brvcc->atmvcc->user_back = NULL; /* what about vcc->recvq ??? */
+ brvcc->atmvcc->release_cb = brvcc->old_release_cb;
brvcc->old_push(brvcc->atmvcc, NULL); /* pass on the bad news */
+ module_put(brvcc->old_owner);
kfree(brvcc);
@ -452,7 +645,7 @@ index 4819d315..a4ee4ad 100644
}
/* when AAL5 PDU comes in: */
@@ -504,6 +512,13 @@ static int br2684_regvcc(struct atm_vcc *atmvcc, void __user * arg)
@@ -504,6 +541,13 @@ static int br2684_regvcc(struct atm_vcc
brvcc = kzalloc(sizeof(struct br2684_vcc), GFP_KERNEL);
if (!brvcc)
return -ENOMEM;
@ -466,19 +659,21 @@ index 4819d315..a4ee4ad 100644
write_lock_irq(&devs_lock);
net_dev = br2684_find_dev(&be.ifspec);
if (net_dev == NULL) {
@@ -546,9 +561,11 @@ static int br2684_regvcc(struct atm_vcc *atmvcc, void __user * arg)
@@ -546,9 +590,13 @@ static int br2684_regvcc(struct atm_vcc
brvcc->encaps = (enum br2684_encaps)be.encaps;
brvcc->old_push = atmvcc->push;
brvcc->old_pop = atmvcc->pop;
+ brvcc->old_release_cb = atmvcc->release_cb;
+ brvcc->old_owner = atmvcc->owner;
barrier();
atmvcc->push = br2684_push;
atmvcc->pop = br2684_pop;
+ atmvcc->release_cb = br2684_release_cb;
+ atmvcc->owner = THIS_MODULE;
/* initialize netdev carrier state */
if (atmvcc->dev->signal == ATM_PHY_SIG_LOST)
@@ -687,10 +704,13 @@ static int br2684_ioctl(struct socket *sock, unsigned int cmd,
@@ -687,10 +735,13 @@ static int br2684_ioctl(struct socket *s
return -ENOIOCTLCMD;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
@ -494,11 +689,9 @@ index 4819d315..a4ee4ad 100644
#ifdef CONFIG_ATM_BR2684_IPFILTER
case BR2684_SETFILT:
if (atmvcc->push != br2684_push)
diff --git a/net/atm/common.c b/net/atm/common.c
index 0c0ad93..806fc0a 100644
--- a/net/atm/common.c
+++ b/net/atm/common.c
@@ -126,10 +126,19 @@ static void vcc_write_space(struct sock *sk)
@@ -126,10 +126,19 @@ static void vcc_write_space(struct sock
rcu_read_unlock();
}
@ -518,7 +711,7 @@ index 0c0ad93..806fc0a 100644
};
int vcc_create(struct net *net, struct socket *sock, int protocol, int family)
@@ -156,7 +165,9 @@ int vcc_create(struct net *net, struct socket *sock, int protocol, int family)
@@ -156,7 +165,9 @@ int vcc_create(struct net *net, struct s
atomic_set(&sk->sk_rmem_alloc, 0);
vcc->push = NULL;
vcc->pop = NULL;
@ -528,7 +721,7 @@ index 0c0ad93..806fc0a 100644
vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */
vcc->atm_options = vcc->aal_options = 0;
sk->sk_destruct = vcc_sock_destruct;
@@ -175,6 +186,7 @@ static void vcc_destroy_socket(struct sock *sk)
@@ -175,6 +186,7 @@ static void vcc_destroy_socket(struct so
vcc->dev->ops->close(vcc);
if (vcc->push)
vcc->push(vcc, NULL); /* atmarpd has no push */
@ -536,8 +729,6 @@ index 0c0ad93..806fc0a 100644
while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
atm_return(vcc, skb->truesize);
diff --git a/net/atm/pppoatm.c b/net/atm/pppoatm.c
index 226dca9..8c93267 100644
--- a/net/atm/pppoatm.c
+++ b/net/atm/pppoatm.c
@@ -60,6 +60,8 @@ struct pppoatm_vcc {
@ -549,7 +740,7 @@ index 226dca9..8c93267 100644
/* keep old push/pop for detaching */
enum pppoatm_encaps encaps;
atomic_t inflight;
@@ -107,6 +109,24 @@ static void pppoatm_wakeup_sender(unsigned long arg)
@@ -107,6 +109,24 @@ static void pppoatm_wakeup_sender(unsign
ppp_output_wakeup((struct ppp_channel *) arg);
}
@ -574,7 +765,7 @@ index 226dca9..8c93267 100644
/*
* This gets called every time the ATM card has finished sending our
* skb. The ->old_pop will take care up normal atm flow control,
@@ -151,12 +171,11 @@ static void pppoatm_unassign_vcc(struct atm_vcc *atmvcc)
@@ -151,12 +171,11 @@ static void pppoatm_unassign_vcc(struct
pvcc = atmvcc_to_pvcc(atmvcc);
atmvcc->push = pvcc->old_push;
atmvcc->pop = pvcc->old_pop;
@ -588,7 +779,7 @@ index 226dca9..8c93267 100644
}
/* Called when an AAL5 PDU comes in */
@@ -165,9 +184,13 @@ static void pppoatm_push(struct atm_vcc *atmvcc, struct sk_buff *skb)
@@ -165,9 +184,13 @@ static void pppoatm_push(struct atm_vcc
struct pppoatm_vcc *pvcc = atmvcc_to_pvcc(atmvcc);
pr_debug("\n");
if (skb == NULL) { /* VCC was closed */
@ -611,7 +802,7 @@ index 226dca9..8c93267 100644
{
/*
* It's not clear that we need to bother with using atm_may_send()
@@ -269,10 +292,33 @@ static inline int pppoatm_may_send(struct pppoatm_vcc *pvcc, int size)
@@ -269,10 +292,33 @@ static inline int pppoatm_may_send(struc
static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb)
{
struct pppoatm_vcc *pvcc = chan_to_pvcc(chan);
@ -645,9 +836,9 @@ index 226dca9..8c93267 100644
switch (pvcc->encaps) { /* LLC encapsulation needed */
case e_llc:
if (skb_headroom(skb) < LLC_LEN) {
@@ -285,8 +331,10 @@ static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb)
@@ -285,8 +331,10 @@ static int pppoatm_send(struct ppp_chann
}
consume_skb(skb);
kfree_skb(skb);
skb = n;
- if (skb == NULL)
+ if (skb == NULL) {
@ -657,7 +848,7 @@ index 226dca9..8c93267 100644
} else if (!pppoatm_may_send(pvcc, skb->truesize))
goto nospace;
memcpy(skb_push(skb, LLC_LEN), pppllc, LLC_LEN);
@@ -296,6 +344,7 @@ static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb)
@@ -296,6 +344,7 @@ static int pppoatm_send(struct ppp_chann
goto nospace;
break;
case e_autodetect:
@ -665,7 +856,7 @@ index 226dca9..8c93267 100644
pr_debug("Trying to send without setting encaps!\n");
kfree_skb(skb);
return 1;
@@ -305,9 +354,12 @@ static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb)
@@ -305,9 +354,12 @@ static int pppoatm_send(struct ppp_chann
ATM_SKB(skb)->atm_options = ATM_SKB(skb)->vcc->atm_options;
pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n",
skb, ATM_SKB(skb)->vcc, ATM_SKB(skb)->vcc->dev);
@ -679,7 +870,7 @@ index 226dca9..8c93267 100644
/*
* We don't have space to send this SKB now, but we might have
* already applied SC_COMP_PROT compression, so may need to undo
@@ -362,6 +414,8 @@ static int pppoatm_assign_vcc(struct atm_vcc *atmvcc, void __user *arg)
@@ -362,6 +414,8 @@ static int pppoatm_assign_vcc(struct atm
atomic_set(&pvcc->inflight, NONE_INFLIGHT);
pvcc->old_push = atmvcc->push;
pvcc->old_pop = atmvcc->pop;
@ -688,7 +879,7 @@ index 226dca9..8c93267 100644
pvcc->encaps = (enum pppoatm_encaps) be.encaps;
pvcc->chan.private = pvcc;
pvcc->chan.ops = &pppoatm_ops;
@@ -377,7 +431,9 @@ static int pppoatm_assign_vcc(struct atm_vcc *atmvcc, void __user *arg)
@@ -377,7 +431,9 @@ static int pppoatm_assign_vcc(struct atm
atmvcc->user_back = pvcc;
atmvcc->push = pppoatm_push;
atmvcc->pop = pppoatm_pop;
@ -698,7 +889,7 @@ index 226dca9..8c93267 100644
/* re-process everything received between connection setup and
backend setup */
@@ -406,6 +462,8 @@ static int pppoatm_ioctl(struct socket *sock, unsigned int cmd,
@@ -406,6 +462,8 @@ static int pppoatm_ioctl(struct socket *
return -ENOIOCTLCMD;
if (!capable(CAP_NET_ADMIN))
return -EPERM;

365
target/linux/generic/patches-3.6/131-atm-fixes.patch
View file

@ -1,4 +1,36 @@
commit 86768086727a60335b08c34b2966c784029a24cf
commit d7d3d8f1ee4435e32bc6c93187798b7e2e3170a9
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Thu Nov 29 23:28:30 2012 +0000
solos-pci: remove list_vccs() debugging function
No idea why we've gone so long dumping a list of VCCs with vci==0 on
every ->open() call...
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit c93967bfd3a3dffa759a3f28370167bf3cdbc3d0
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Thu Nov 29 23:27:20 2012 +0000
solos-pci: use GFP_KERNEL where possible, not GFP_ATOMIC
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit ad6999e17ae4f7b99f6d28f425ae970acb115347
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Thu Nov 29 23:15:30 2012 +0000
solos-pci: clean up pclose() function
- Flush pending TX skbs from the queue rather than waiting for them all to
complete (suggested by Krzysztof Mazur <krzysiek@podlesie.net>).
- Clear ATM_VF_ADDR only when the PKT_PCLOSE packet has been submitted.
- Don't clear ATM_VF_READY at all — vcc_destroy_socket() does that for us.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit 2547e97f29d6d69d567947d5ef90b6b4fbcaf565
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Wed Nov 28 10:15:05 2012 +0000
@ -10,7 +42,7 @@ Date: Wed Nov 28 10:15:05 2012 +0000
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Krzysztof Mazur <krzysiek@podlesie.net>
commit a009aa5fde926350f7a7e558a3ac0180e10eb24a
commit 990b0884a2e9668c08e9daa4d70a54d65329cb6f
Author: Krzysztof Mazur <krzysiek@podlesie.net>
Date: Wed Nov 28 09:08:04 2012 +0100
@ -26,7 +58,7 @@ Date: Wed Nov 28 09:08:04 2012 +0100
Signed-off-by: Krzysztof Mazur <krzysiek@podlesie.net>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit ae2169bcb6375fb214cadd0ea50ac54bcf39b0d6
commit f49b6da01f0abebb17f6241473d53018d923f6b0
Author: Nathan Williams <nathan@traverse.com.au>
Date: Tue Nov 27 17:34:09 2012 +1100
@ -37,7 +69,7 @@ Date: Tue Nov 27 17:34:09 2012 +1100
Signed-off-by: Nathan Williams <nathan@traverse.com.au>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit 6227612becaebe2f9f4ad7d0cdf27e298bb56687
commit a61d37ff4a555886c4ebe31d2c6d893afb6f4d3c
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Wed Nov 28 00:46:45 2012 +0000
@ -52,7 +84,7 @@ Date: Wed Nov 28 00:46:45 2012 +0000
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Krzysztof Mazur <krzysiek@podlesie.net>
commit 44abbb464896dc2270716d25e12fe47e57eeb1d3
commit c52f40629884ddc62c7af445fd5d620fdb466fb2
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Wed Nov 28 00:05:52 2012 +0000
@ -69,11 +101,30 @@ Date: Wed Nov 28 00:05:52 2012 +0000
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Krzysztof Mazur <krzysiek@podlesie.net>
commit c93eeac2ebee497dbc9b6ad39c235ff3061be141
commit 35826e7372fe39b7db7930eda0267c82d68d1a4c
Author: David Woodhouse <dwmw2@infradead.org>
Date: Tue Nov 27 23:28:36 2012 +0000
br2684: don't send frames on not-ready vcc
Avoid submitting packets to a vcc which is being closed. Things go badly
wrong when the ->pop method gets later called after everything's been
torn down.
Use the ATM socket lock for synchronisation with vcc_destroy_socket(),
which clears the ATM_VF_READY bit under the same lock. Otherwise, we
could end up submitting a packet to the device driver even after its
->ops->close method has been called. And it could call the vcc's ->pop
method after the protocol has been shut down. Which leads to a panic.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Krzysztof Mazur <krzysiek@podlesie.net>
commit 7f940dde65de4a707f3dd723bb6ce9de90ca1eab
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Wed Nov 28 00:03:11 2012 +0000
atm: Add release_cb() callback to vcc
atm: add release_cb() callback to vcc
The immediate use case for this is that it will allow us to ensure that a
pppoatm queue is woken after it has to drop a packet due to the sock being
@ -86,24 +137,11 @@ Date: Wed Nov 28 00:03:11 2012 +0000
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Krzysztof Mazur <krzysiek@podlesie.net>
commit 9b3e2e224cc4326d8897243b24d778abf9098a8d
Author: David Woodhouse <dwmw2@infradead.org>
Date: Tue Nov 27 23:28:36 2012 +0000
br2684: don't send frames on not-ready vcc
Avoid submitting packets to a vcc which is being closed. Things go badly
wrong when the ->pop method gets later called after everything's been
torn down.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Krzysztof Mazur <krzysiek@podlesie.net>
commit 26c7c53318cf56a690ae553104f4a60181734fb5
commit def1b2f9083f84d0a77730e537c76429914d17c1
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Tue Nov 27 23:49:24 2012 +0000
solos-pci: Wait for pending TX to complete when releasing vcc
solos-pci: wait for pending TX to complete when releasing vcc
We should no longer be calling the old pop routine for the vcc, after
vcc_release() has completed. Make sure we wait for any pending TX skbs
@ -111,7 +149,7 @@ Date: Tue Nov 27 23:49:24 2012 +0000
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit 1a3304e89b9ba168340a37926014be11c3ad110e
commit 397ff16dce53888ec693b3718640be2560204751
Author: Krzysztof Mazur <krzysiek@podlesie.net>
Date: Tue Nov 6 23:17:02 2012 +0100
@ -129,19 +167,16 @@ Date: Tue Nov 6 23:17:02 2012 +0100
Signed-off-by: Krzysztof Mazur <krzysiek@podlesie.net>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit 294398bcd0fe26335059a185b59cfb5de1fc4c71
commit 071d93931a75dc1f82f0baa9959613af81c5a032
Author: Krzysztof Mazur <krzysiek@podlesie.net>
Date: Sat Nov 10 23:33:19 2012 +0100
pppoatm: drop frames to not-ready vcc
Patches "atm: detach protocol before closing vcc"
and "pppoatm: allow assign only on a connected socket" fixed
common cases where the pppoatm_send() crashes while sending
frame to not-ready vcc. However there are still some other cases
where we can send frames to vcc, which is flagged as ATM_VF_CLOSE
(for instance after vcc_release_async()) or it's opened but not
ready yet.
The vcc_destroy_socket() closes vcc before the protocol is detached
from vcc by calling vcc->push() with NULL skb. This leaves some time
window, where the protocol may call vcc->send() on closed vcc
and crash.
Now pppoatm_send(), like vcc_sendmsg(), checks for vcc flags that
indicate that vcc is not ready. If the vcc is not ready we just
@ -277,8 +312,6 @@ Date: Sun Nov 25 12:06:52 2012 +0000
Reviewed-by: Krzysztof Mazur <krzysiek@podlesie.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/atm/solos-pci.c b/drivers/atm/solos-pci.c
index 9851093..6258961 100644
--- a/drivers/atm/solos-pci.c
+++ b/drivers/atm/solos-pci.c
@@ -92,6 +92,7 @@ struct pkt_hdr {
@ -289,7 +322,15 @@ index 9851093..6258961 100644
struct atm_vcc *vcc;
uint32_t dma_addr;
};
@@ -710,7 +711,8 @@ void solos_bh(unsigned long card_arg)
@@ -164,7 +165,6 @@ static void fpga_queue(struct solos_card
static uint32_t fpga_tx(struct solos_card *);
static irqreturn_t solos_irq(int irq, void *dev_id);
static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
-static int list_vccs(int vci);
static int atm_init(struct solos_card *, struct device *);
static void atm_remove(struct solos_card *);
static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
@@ -710,7 +710,8 @@ void solos_bh(unsigned long card_arg)
dev_warn(&card->dev->dev, "Received packet for unknown VPI.VCI %d.%d on port %d\n",
le16_to_cpu(header->vpi), le16_to_cpu(header->vci),
port);
@ -299,26 +340,119 @@ index 9851093..6258961 100644
}
atm_charge(vcc, skb->truesize);
vcc->push(vcc, skb);
@@ -881,11 +883,18 @@ static void pclose(struct atm_vcc *vcc)
@@ -790,44 +791,6 @@ static struct atm_vcc *find_vcc(struct a
return vcc;
}
-static int list_vccs(int vci)
-{
- struct hlist_head *head;
- struct atm_vcc *vcc;
- struct hlist_node *node;
- struct sock *s;
- int num_found = 0;
- int i;
-
- read_lock(&vcc_sklist_lock);
- if (vci != 0){
- head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
- sk_for_each(s, node, head) {
- num_found ++;
- vcc = atm_sk(s);
- printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
- vcc->dev->number,
- vcc->vpi,
- vcc->vci);
- }
- } else {
- for(i = 0; i < VCC_HTABLE_SIZE; i++){
- head = &vcc_hash[i];
- sk_for_each(s, node, head) {
- num_found ++;
- vcc = atm_sk(s);
- printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
- vcc->dev->number,
- vcc->vpi,
- vcc->vci);
- }
- }
- }
- read_unlock(&vcc_sklist_lock);
- return num_found;
-}
-
-
static int popen(struct atm_vcc *vcc)
{
struct solos_card *card = vcc->dev->dev_data;
@@ -840,7 +803,7 @@ static int popen(struct atm_vcc *vcc)
return -EINVAL;
}
- skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
+ skb = alloc_skb(sizeof(*header), GFP_KERNEL);
if (!skb) {
if (net_ratelimit())
dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
@@ -857,8 +820,6 @@ static int popen(struct atm_vcc *vcc)
set_bit(ATM_VF_ADDR, &vcc->flags);
set_bit(ATM_VF_READY, &vcc->flags);
- list_vccs(0);
-
return 0;
}
@@ -866,10 +827,21 @@ static int popen(struct atm_vcc *vcc)
static void pclose(struct atm_vcc *vcc)
{
struct solos_card *card = vcc->dev->dev_data;
- struct sk_buff *skb;
+ unsigned char port = SOLOS_CHAN(vcc->dev);
+ struct sk_buff *skb, *tmpskb;
struct pkt_hdr *header;
- skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
+ /* Remove any yet-to-be-transmitted packets from the pending queue */
+ spin_lock(&card->tx_queue_lock);
+ skb_queue_walk_safe(&card->tx_queue[port], skb, tmpskb) {
+ if (SKB_CB(skb)->vcc == vcc) {
+ skb_unlink(skb, &card->tx_queue[port]);
+ solos_pop(vcc, skb);
+ }
+ }
+ spin_unlock(&card->tx_queue_lock);
+
+ skb = alloc_skb(sizeof(*header), GFP_KERNEL);
if (!skb) {
dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
return;
@@ -881,15 +853,21 @@ static void pclose(struct atm_vcc *vcc)
header->vci = cpu_to_le16(vcc->vci);
header->type = cpu_to_le16(PKT_PCLOSE);
- fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
+ init_completion(&SKB_CB(skb)->c);
- clear_bit(ATM_VF_ADDR, &vcc->flags);
- clear_bit(ATM_VF_READY, &vcc->flags);
+ fpga_queue(card, port, skb, NULL);
+
fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
clear_bit(ATM_VF_ADDR, &vcc->flags);
clear_bit(ATM_VF_READY, &vcc->flags);
+ if (!wait_for_completion_timeout(&SKB_CB(skb)->c,
+ msecs_to_jiffies(5000)))
+ if (!wait_for_completion_timeout(&SKB_CB(skb)->c, 5 * HZ))
+ dev_warn(&card->dev->dev, "Timeout waiting for VCC close on port %d\n",
+ SOLOS_CHAN(vcc->dev));
+
+ port);
/* Hold up vcc_destroy_socket() (our caller) until solos_bh() in the
tasklet has finished processing any incoming packets (and, more to
the point, using the vcc pointer). */
@@ -1011,9 +1020,12 @@ static uint32_t fpga_tx(struct solos_card *card)
tasklet_unlock_wait(&card->tlet);
+
+ clear_bit(ATM_VF_ADDR, &vcc->flags);
+
return;
}
@@ -1011,9 +989,12 @@ static uint32_t fpga_tx(struct solos_car
if (vcc) {
atomic_inc(&vcc->stats->tx);
solos_pop(vcc, oldskb);
@ -333,7 +467,16 @@ index 9851093..6258961 100644
}
}
/* For non-DMA TX, write the 'TX start' bit for all four ports simultaneously */
@@ -1345,6 +1357,8 @@ static struct pci_driver fpga_driver = {
@@ -1248,7 +1229,7 @@ static int atm_init(struct solos_card *c
card->atmdev[i]->phy_data = (void *)(unsigned long)i;
atm_dev_signal_change(card->atmdev[i], ATM_PHY_SIG_FOUND);
- skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
+ skb = alloc_skb(sizeof(*header), GFP_KERNEL);
if (!skb) {
dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
continue;
@@ -1345,6 +1326,8 @@ static struct pci_driver fpga_driver = {
static int __init solos_pci_init(void)
{
@ -342,11 +485,9 @@ index 9851093..6258961 100644
printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
return pci_register_driver(&fpga_driver);
}
diff --git a/include/linux/atmdev.h b/include/linux/atmdev.h
index 22ef21c..c1da539 100644
--- a/include/linux/atmdev.h
+++ b/include/linux/atmdev.h
@@ -99,6 +99,7 @@ struct atm_vcc {
@@ -308,6 +308,7 @@ struct atm_vcc {
struct atm_dev *dev; /* device back pointer */
struct atm_qos qos; /* QOS */
struct atm_sap sap; /* SAP */
@ -354,7 +495,7 @@ index 22ef21c..c1da539 100644
void (*push)(struct atm_vcc *vcc,struct sk_buff *skb);
void (*pop)(struct atm_vcc *vcc,struct sk_buff *skb); /* optional */
int (*push_oam)(struct atm_vcc *vcc,void *cell);
@@ -106,6 +107,7 @@ struct atm_vcc {
@@ -315,6 +316,7 @@ struct atm_vcc {
void *dev_data; /* per-device data */
void *proto_data; /* per-protocol data */
struct k_atm_aal_stats *stats; /* pointer to AAL stats group */
@ -362,14 +503,13 @@ index 22ef21c..c1da539 100644
/* SVC part --- may move later ------------------------------------- */
short itf; /* interface number */
struct sockaddr_atmsvc local;
diff --git a/net/atm/br2684.c b/net/atm/br2684.c
index 4819d315..a4ee4ad 100644
--- a/net/atm/br2684.c
+++ b/net/atm/br2684.c
@@ -68,12 +68,14 @@ struct br2684_vcc {
@@ -68,12 +68,15 @@ struct br2684_vcc {
/* keep old push, pop functions for chaining */
void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb);
void (*old_pop)(struct atm_vcc *vcc, struct sk_buff *skb);
+ void (*old_release_cb)(struct atm_vcc *vcc);
+ struct module *old_owner;
enum br2684_encaps encaps;
struct list_head brvccs;
@ -381,7 +521,7 @@ index 4819d315..a4ee4ad 100644
};
struct br2684_dev {
@@ -181,18 +183,15 @@ static struct notifier_block atm_dev_notifier = {
@@ -181,18 +184,15 @@ static struct notifier_block atm_dev_not
static void br2684_pop(struct atm_vcc *vcc, struct sk_buff *skb)
{
struct br2684_vcc *brvcc = BR2684_VCC(vcc);
@ -405,18 +545,7 @@ index 4819d315..a4ee4ad 100644
/*
* Send a packet out a particular vcc. Not to useful right now, but paves
* the way for multiple vcc's per itf. Returns true if we can send,
@@ -251,21 +250,30 @@ static int br2684_xmit_vcc(struct sk_buff *skb, struct net_device *dev,
skb_debug(skb);
ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc;
+ if (test_bit(ATM_VF_RELEASED, &atmvcc->flags) ||
+ test_bit(ATM_VF_CLOSE, &atmvcc->flags) ||
+ !test_bit(ATM_VF_READY, &atmvcc->flags)) {
+ dev_kfree_skb(skb);
+ return 0;
+ }
pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev);
atomic_add(skb->truesize, &sk_atm(atmvcc)->sk_wmem_alloc);
@@ -256,16 +256,30 @@ static int br2684_xmit_vcc(struct sk_buf
ATM_SKB(skb)->atm_options = atmvcc->atm_options;
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
@ -439,12 +568,76 @@ index 4819d315..a4ee4ad 100644
+ will wake the queue if appropriate. Just return an error so that
+ the stats are updated correctly */
+ return !atmvcc->send(atmvcc, skb);
+}
+
+static void br2684_release_cb(struct atm_vcc *atmvcc)
+{
+ struct br2684_vcc *brvcc = BR2684_VCC(atmvcc);
+
+ if (atomic_read(&brvcc->qspace) > 0)
+ netif_wake_queue(brvcc->device);
+
+ if (brvcc->old_release_cb)
+ brvcc->old_release_cb(atmvcc);
}
static inline struct br2684_vcc *pick_outgoing_vcc(const struct sk_buff *skb,
@@ -378,8 +386,8 @@ static void br2684_close_vcc(struct br2684_vcc *brvcc)
@@ -279,6 +293,8 @@ static netdev_tx_t br2684_start_xmit(str
{
struct br2684_dev *brdev = BRPRIV(dev);
struct br2684_vcc *brvcc;
+ struct atm_vcc *atmvcc;
+ netdev_tx_t ret = NETDEV_TX_OK;
pr_debug("skb_dst(skb)=%p\n", skb_dst(skb));
read_lock(&devs_lock);
@@ -289,9 +305,26 @@ static netdev_tx_t br2684_start_xmit(str
dev->stats.tx_carrier_errors++;
/* netif_stop_queue(dev); */
dev_kfree_skb(skb);
- read_unlock(&devs_lock);
- return NETDEV_TX_OK;
+ goto out_devs;
}
+ atmvcc = brvcc->atmvcc;
+
+ bh_lock_sock(sk_atm(atmvcc));
+
+ if (test_bit(ATM_VF_RELEASED, &atmvcc->flags) ||
+ test_bit(ATM_VF_CLOSE, &atmvcc->flags) ||
+ !test_bit(ATM_VF_READY, &atmvcc->flags)) {
+ dev->stats.tx_dropped++;
+ dev_kfree_skb(skb);
+ goto out;
+ }
+
+ if (sock_owned_by_user(sk_atm(atmvcc))) {
+ netif_stop_queue(brvcc->device);
+ ret = NETDEV_TX_BUSY;
+ goto out;
+ }
+
if (!br2684_xmit_vcc(skb, dev, brvcc)) {
/*
* We should probably use netif_*_queue() here, but that
@@ -303,8 +336,11 @@ static netdev_tx_t br2684_start_xmit(str
dev->stats.tx_errors++;
dev->stats.tx_fifo_errors++;
}
+ out:
+ bh_unlock_sock(sk_atm(atmvcc));
+ out_devs:
read_unlock(&devs_lock);
- return NETDEV_TX_OK;
+ return ret;
}
/*
@@ -377,9 +413,10 @@ static void br2684_close_vcc(struct br26
list_del(&brvcc->brvccs);
write_unlock_irq(&devs_lock);
brvcc->atmvcc->user_back = NULL; /* what about vcc->recvq ??? */
+ brvcc->atmvcc->release_cb = brvcc->old_release_cb;
brvcc->old_push(brvcc->atmvcc, NULL); /* pass on the bad news */
+ module_put(brvcc->old_owner);
kfree(brvcc);
@ -452,7 +645,7 @@ index 4819d315..a4ee4ad 100644
}
/* when AAL5 PDU comes in: */
@@ -504,6 +512,13 @@ static int br2684_regvcc(struct atm_vcc *atmvcc, void __user * arg)
@@ -504,6 +541,13 @@ static int br2684_regvcc(struct atm_vcc
brvcc = kzalloc(sizeof(struct br2684_vcc), GFP_KERNEL);
if (!brvcc)
return -ENOMEM;
@ -466,19 +659,21 @@ index 4819d315..a4ee4ad 100644
write_lock_irq(&devs_lock);
net_dev = br2684_find_dev(&be.ifspec);
if (net_dev == NULL) {
@@ -546,9 +561,11 @@ static int br2684_regvcc(struct atm_vcc *atmvcc, void __user * arg)
@@ -546,9 +590,13 @@ static int br2684_regvcc(struct atm_vcc
brvcc->encaps = (enum br2684_encaps)be.encaps;
brvcc->old_push = atmvcc->push;
brvcc->old_pop = atmvcc->pop;
+ brvcc->old_release_cb = atmvcc->release_cb;
+ brvcc->old_owner = atmvcc->owner;
barrier();
atmvcc->push = br2684_push;
atmvcc->pop = br2684_pop;
+ atmvcc->release_cb = br2684_release_cb;
+ atmvcc->owner = THIS_MODULE;
/* initialize netdev carrier state */
if (atmvcc->dev->signal == ATM_PHY_SIG_LOST)
@@ -687,10 +704,13 @@ static int br2684_ioctl(struct socket *sock, unsigned int cmd,
@@ -687,10 +735,13 @@ static int br2684_ioctl(struct socket *s
return -ENOIOCTLCMD;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
@ -494,11 +689,9 @@ index 4819d315..a4ee4ad 100644
#ifdef CONFIG_ATM_BR2684_IPFILTER
case BR2684_SETFILT:
if (atmvcc->push != br2684_push)
diff --git a/net/atm/common.c b/net/atm/common.c
index 0c0ad93..806fc0a 100644
--- a/net/atm/common.c
+++ b/net/atm/common.c
@@ -126,10 +126,19 @@ static void vcc_write_space(struct sock *sk)
@@ -126,10 +126,19 @@ static void vcc_write_space(struct sock
rcu_read_unlock();
}
@ -518,7 +711,7 @@ index 0c0ad93..806fc0a 100644
};
int vcc_create(struct net *net, struct socket *sock, int protocol, int family)
@@ -156,7 +165,9 @@ int vcc_create(struct net *net, struct socket *sock, int protocol, int family)
@@ -156,7 +165,9 @@ int vcc_create(struct net *net, struct s
atomic_set(&sk->sk_rmem_alloc, 0);
vcc->push = NULL;
vcc->pop = NULL;
@ -528,7 +721,7 @@ index 0c0ad93..806fc0a 100644
vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */
vcc->atm_options = vcc->aal_options = 0;
sk->sk_destruct = vcc_sock_destruct;
@@ -175,6 +186,7 @@ static void vcc_destroy_socket(struct sock *sk)
@@ -175,6 +186,7 @@ static void vcc_destroy_socket(struct so
vcc->dev->ops->close(vcc);
if (vcc->push)
vcc->push(vcc, NULL); /* atmarpd has no push */
@ -536,8 +729,6 @@ index 0c0ad93..806fc0a 100644
while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
atm_return(vcc, skb->truesize);
diff --git a/net/atm/pppoatm.c b/net/atm/pppoatm.c
index 226dca9..8c93267 100644
--- a/net/atm/pppoatm.c
+++ b/net/atm/pppoatm.c
@@ -60,6 +60,8 @@ struct pppoatm_vcc {
@ -549,7 +740,7 @@ index 226dca9..8c93267 100644
/* keep old push/pop for detaching */
enum pppoatm_encaps encaps;
atomic_t inflight;
@@ -107,6 +109,24 @@ static void pppoatm_wakeup_sender(unsigned long arg)
@@ -107,6 +109,24 @@ static void pppoatm_wakeup_sender(unsign
ppp_output_wakeup((struct ppp_channel *) arg);
}
@ -574,7 +765,7 @@ index 226dca9..8c93267 100644
/*
* This gets called every time the ATM card has finished sending our
* skb. The ->old_pop will take care up normal atm flow control,
@@ -151,12 +171,11 @@ static void pppoatm_unassign_vcc(struct atm_vcc *atmvcc)
@@ -151,12 +171,11 @@ static void pppoatm_unassign_vcc(struct
pvcc = atmvcc_to_pvcc(atmvcc);
atmvcc->push = pvcc->old_push;
atmvcc->pop = pvcc->old_pop;
@ -588,7 +779,7 @@ index 226dca9..8c93267 100644
}
/* Called when an AAL5 PDU comes in */
@@ -165,9 +184,13 @@ static void pppoatm_push(struct atm_vcc *atmvcc, struct sk_buff *skb)
@@ -165,9 +184,13 @@ static void pppoatm_push(struct atm_vcc
struct pppoatm_vcc *pvcc = atmvcc_to_pvcc(atmvcc);
pr_debug("\n");
if (skb == NULL) { /* VCC was closed */
@ -611,7 +802,7 @@ index 226dca9..8c93267 100644
{
/*
* It's not clear that we need to bother with using atm_may_send()
@@ -269,10 +292,33 @@ static inline int pppoatm_may_send(struct pppoatm_vcc *pvcc, int size)
@@ -269,10 +292,33 @@ static inline int pppoatm_may_send(struc
static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb)
{
struct pppoatm_vcc *pvcc = chan_to_pvcc(chan);
@ -645,7 +836,7 @@ index 226dca9..8c93267 100644
switch (pvcc->encaps) { /* LLC encapsulation needed */
case e_llc:
if (skb_headroom(skb) < LLC_LEN) {
@@ -285,8 +331,10 @@ static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb)
@@ -285,8 +331,10 @@ static int pppoatm_send(struct ppp_chann
}
consume_skb(skb);
skb = n;
@ -657,7 +848,7 @@ index 226dca9..8c93267 100644
} else if (!pppoatm_may_send(pvcc, skb->truesize))
goto nospace;
memcpy(skb_push(skb, LLC_LEN), pppllc, LLC_LEN);
@@ -296,6 +344,7 @@ static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb)
@@ -296,6 +344,7 @@ static int pppoatm_send(struct ppp_chann
goto nospace;
break;
case e_autodetect:
@ -665,7 +856,7 @@ index 226dca9..8c93267 100644
pr_debug("Trying to send without setting encaps!\n");
kfree_skb(skb);
return 1;
@@ -305,9 +354,12 @@ static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb)
@@ -305,9 +354,12 @@ static int pppoatm_send(struct ppp_chann
ATM_SKB(skb)->atm_options = ATM_SKB(skb)->vcc->atm_options;
pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n",
skb, ATM_SKB(skb)->vcc, ATM_SKB(skb)->vcc->dev);
@ -679,7 +870,7 @@ index 226dca9..8c93267 100644
/*
* We don't have space to send this SKB now, but we might have
* already applied SC_COMP_PROT compression, so may need to undo
@@ -362,6 +414,8 @@ static int pppoatm_assign_vcc(struct atm_vcc *atmvcc, void __user *arg)
@@ -362,6 +414,8 @@ static int pppoatm_assign_vcc(struct atm
atomic_set(&pvcc->inflight, NONE_INFLIGHT);
pvcc->old_push = atmvcc->push;
pvcc->old_pop = atmvcc->pop;
@ -688,7 +879,7 @@ index 226dca9..8c93267 100644
pvcc->encaps = (enum pppoatm_encaps) be.encaps;
pvcc->chan.private = pvcc;
pvcc->chan.ops = &pppoatm_ops;
@@ -377,7 +431,9 @@ static int pppoatm_assign_vcc(struct atm_vcc *atmvcc, void __user *arg)
@@ -377,7 +431,9 @@ static int pppoatm_assign_vcc(struct atm
atmvcc->user_back = pvcc;
atmvcc->push = pppoatm_push;
atmvcc->pop = pppoatm_pop;
@ -698,7 +889,7 @@ index 226dca9..8c93267 100644
/* re-process everything received between connection setup and
backend setup */
@@ -406,6 +462,8 @@ static int pppoatm_ioctl(struct socket *sock, unsigned int cmd,
@@ -406,6 +462,8 @@ static int pppoatm_ioctl(struct socket *
return -ENOIOCTLCMD;
if (!capable(CAP_NET_ADMIN))
return -EPERM;

361
target/linux/generic/patches-3.7/131-atm-fixes.patch
View file

@ -1,4 +1,36 @@
commit 86768086727a60335b08c34b2966c784029a24cf
commit d7d3d8f1ee4435e32bc6c93187798b7e2e3170a9
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Thu Nov 29 23:28:30 2012 +0000
solos-pci: remove list_vccs() debugging function
No idea why we've gone so long dumping a list of VCCs with vci==0 on
every ->open() call...
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit c93967bfd3a3dffa759a3f28370167bf3cdbc3d0
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Thu Nov 29 23:27:20 2012 +0000
solos-pci: use GFP_KERNEL where possible, not GFP_ATOMIC
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit ad6999e17ae4f7b99f6d28f425ae970acb115347
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Thu Nov 29 23:15:30 2012 +0000
solos-pci: clean up pclose() function
- Flush pending TX skbs from the queue rather than waiting for them all to
complete (suggested by Krzysztof Mazur <krzysiek@podlesie.net>).
- Clear ATM_VF_ADDR only when the PKT_PCLOSE packet has been submitted.
- Don't clear ATM_VF_READY at all — vcc_destroy_socket() does that for us.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit 2547e97f29d6d69d567947d5ef90b6b4fbcaf565
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Wed Nov 28 10:15:05 2012 +0000
@ -10,7 +42,7 @@ Date: Wed Nov 28 10:15:05 2012 +0000
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Krzysztof Mazur <krzysiek@podlesie.net>
commit a009aa5fde926350f7a7e558a3ac0180e10eb24a
commit 990b0884a2e9668c08e9daa4d70a54d65329cb6f
Author: Krzysztof Mazur <krzysiek@podlesie.net>
Date: Wed Nov 28 09:08:04 2012 +0100
@ -26,7 +58,7 @@ Date: Wed Nov 28 09:08:04 2012 +0100
Signed-off-by: Krzysztof Mazur <krzysiek@podlesie.net>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit ae2169bcb6375fb214cadd0ea50ac54bcf39b0d6
commit f49b6da01f0abebb17f6241473d53018d923f6b0
Author: Nathan Williams <nathan@traverse.com.au>
Date: Tue Nov 27 17:34:09 2012 +1100
@ -37,7 +69,7 @@ Date: Tue Nov 27 17:34:09 2012 +1100
Signed-off-by: Nathan Williams <nathan@traverse.com.au>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit 6227612becaebe2f9f4ad7d0cdf27e298bb56687
commit a61d37ff4a555886c4ebe31d2c6d893afb6f4d3c
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Wed Nov 28 00:46:45 2012 +0000
@ -52,7 +84,7 @@ Date: Wed Nov 28 00:46:45 2012 +0000
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Krzysztof Mazur <krzysiek@podlesie.net>
commit 44abbb464896dc2270716d25e12fe47e57eeb1d3
commit c52f40629884ddc62c7af445fd5d620fdb466fb2
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Wed Nov 28 00:05:52 2012 +0000
@ -69,11 +101,30 @@ Date: Wed Nov 28 00:05:52 2012 +0000
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Krzysztof Mazur <krzysiek@podlesie.net>
commit c93eeac2ebee497dbc9b6ad39c235ff3061be141
commit 35826e7372fe39b7db7930eda0267c82d68d1a4c
Author: David Woodhouse <dwmw2@infradead.org>
Date: Tue Nov 27 23:28:36 2012 +0000
br2684: don't send frames on not-ready vcc
Avoid submitting packets to a vcc which is being closed. Things go badly
wrong when the ->pop method gets later called after everything's been
torn down.
Use the ATM socket lock for synchronisation with vcc_destroy_socket(),
which clears the ATM_VF_READY bit under the same lock. Otherwise, we
could end up submitting a packet to the device driver even after its
->ops->close method has been called. And it could call the vcc's ->pop
method after the protocol has been shut down. Which leads to a panic.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Krzysztof Mazur <krzysiek@podlesie.net>
commit 7f940dde65de4a707f3dd723bb6ce9de90ca1eab
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Wed Nov 28 00:03:11 2012 +0000
atm: Add release_cb() callback to vcc
atm: add release_cb() callback to vcc
The immediate use case for this is that it will allow us to ensure that a
pppoatm queue is woken after it has to drop a packet due to the sock being
@ -86,24 +137,11 @@ Date: Wed Nov 28 00:03:11 2012 +0000
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Krzysztof Mazur <krzysiek@podlesie.net>
commit 9b3e2e224cc4326d8897243b24d778abf9098a8d
Author: David Woodhouse <dwmw2@infradead.org>
Date: Tue Nov 27 23:28:36 2012 +0000
br2684: don't send frames on not-ready vcc
Avoid submitting packets to a vcc which is being closed. Things go badly
wrong when the ->pop method gets later called after everything's been
torn down.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Krzysztof Mazur <krzysiek@podlesie.net>
commit 26c7c53318cf56a690ae553104f4a60181734fb5
commit def1b2f9083f84d0a77730e537c76429914d17c1
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Tue Nov 27 23:49:24 2012 +0000
solos-pci: Wait for pending TX to complete when releasing vcc
solos-pci: wait for pending TX to complete when releasing vcc
We should no longer be calling the old pop routine for the vcc, after
vcc_release() has completed. Make sure we wait for any pending TX skbs
@ -111,7 +149,7 @@ Date: Tue Nov 27 23:49:24 2012 +0000
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit 1a3304e89b9ba168340a37926014be11c3ad110e
commit 397ff16dce53888ec693b3718640be2560204751
Author: Krzysztof Mazur <krzysiek@podlesie.net>
Date: Tue Nov 6 23:17:02 2012 +0100
@ -129,19 +167,16 @@ Date: Tue Nov 6 23:17:02 2012 +0100
Signed-off-by: Krzysztof Mazur <krzysiek@podlesie.net>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit 294398bcd0fe26335059a185b59cfb5de1fc4c71
commit 071d93931a75dc1f82f0baa9959613af81c5a032
Author: Krzysztof Mazur <krzysiek@podlesie.net>
Date: Sat Nov 10 23:33:19 2012 +0100
pppoatm: drop frames to not-ready vcc
Patches "atm: detach protocol before closing vcc"
and "pppoatm: allow assign only on a connected socket" fixed
common cases where the pppoatm_send() crashes while sending
frame to not-ready vcc. However there are still some other cases
where we can send frames to vcc, which is flagged as ATM_VF_CLOSE
(for instance after vcc_release_async()) or it's opened but not
ready yet.
The vcc_destroy_socket() closes vcc before the protocol is detached
from vcc by calling vcc->push() with NULL skb. This leaves some time
window, where the protocol may call vcc->send() on closed vcc
and crash.
Now pppoatm_send(), like vcc_sendmsg(), checks for vcc flags that
indicate that vcc is not ready. If the vcc is not ready we just
@ -277,8 +312,6 @@ Date: Sun Nov 25 12:06:52 2012 +0000
Reviewed-by: Krzysztof Mazur <krzysiek@podlesie.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/atm/solos-pci.c b/drivers/atm/solos-pci.c
index 9851093..6258961 100644
--- a/drivers/atm/solos-pci.c
+++ b/drivers/atm/solos-pci.c
@@ -92,6 +92,7 @@ struct pkt_hdr {
@ -289,7 +322,15 @@ index 9851093..6258961 100644
struct atm_vcc *vcc;
uint32_t dma_addr;
};
@@ -710,7 +711,8 @@ void solos_bh(unsigned long card_arg)
@@ -164,7 +165,6 @@ static void fpga_queue(struct solos_card
static uint32_t fpga_tx(struct solos_card *);
static irqreturn_t solos_irq(int irq, void *dev_id);
static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
-static int list_vccs(int vci);
static int atm_init(struct solos_card *, struct device *);
static void atm_remove(struct solos_card *);
static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
@@ -710,7 +710,8 @@ void solos_bh(unsigned long card_arg)
dev_warn(&card->dev->dev, "Received packet for unknown VPI.VCI %d.%d on port %d\n",
le16_to_cpu(header->vpi), le16_to_cpu(header->vci),
port);
@ -299,26 +340,119 @@ index 9851093..6258961 100644
}
atm_charge(vcc, skb->truesize);
vcc->push(vcc, skb);
@@ -881,11 +883,18 @@ static void pclose(struct atm_vcc *vcc)
@@ -790,44 +791,6 @@ static struct atm_vcc *find_vcc(struct a
return vcc;
}
-static int list_vccs(int vci)
-{
- struct hlist_head *head;
- struct atm_vcc *vcc;
- struct hlist_node *node;
- struct sock *s;
- int num_found = 0;
- int i;
-
- read_lock(&vcc_sklist_lock);
- if (vci != 0){
- head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
- sk_for_each(s, node, head) {
- num_found ++;
- vcc = atm_sk(s);
- printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
- vcc->dev->number,
- vcc->vpi,
- vcc->vci);
- }
- } else {
- for(i = 0; i < VCC_HTABLE_SIZE; i++){
- head = &vcc_hash[i];
- sk_for_each(s, node, head) {
- num_found ++;
- vcc = atm_sk(s);
- printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
- vcc->dev->number,
- vcc->vpi,
- vcc->vci);
- }
- }
- }
- read_unlock(&vcc_sklist_lock);
- return num_found;
-}
-
-
static int popen(struct atm_vcc *vcc)
{
struct solos_card *card = vcc->dev->dev_data;
@@ -840,7 +803,7 @@ static int popen(struct atm_vcc *vcc)
return -EINVAL;
}
- skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
+ skb = alloc_skb(sizeof(*header), GFP_KERNEL);
if (!skb) {
if (net_ratelimit())
dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
@@ -857,8 +820,6 @@ static int popen(struct atm_vcc *vcc)
set_bit(ATM_VF_ADDR, &vcc->flags);
set_bit(ATM_VF_READY, &vcc->flags);
- list_vccs(0);
-
return 0;
}
@@ -866,10 +827,21 @@ static int popen(struct atm_vcc *vcc)
static void pclose(struct atm_vcc *vcc)
{
struct solos_card *card = vcc->dev->dev_data;
- struct sk_buff *skb;
+ unsigned char port = SOLOS_CHAN(vcc->dev);
+ struct sk_buff *skb, *tmpskb;
struct pkt_hdr *header;
- skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
+ /* Remove any yet-to-be-transmitted packets from the pending queue */
+ spin_lock(&card->tx_queue_lock);
+ skb_queue_walk_safe(&card->tx_queue[port], skb, tmpskb) {
+ if (SKB_CB(skb)->vcc == vcc) {
+ skb_unlink(skb, &card->tx_queue[port]);
+ solos_pop(vcc, skb);
+ }
+ }
+ spin_unlock(&card->tx_queue_lock);
+
+ skb = alloc_skb(sizeof(*header), GFP_KERNEL);
if (!skb) {
dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
return;
@@ -881,15 +853,21 @@ static void pclose(struct atm_vcc *vcc)
header->vci = cpu_to_le16(vcc->vci);
header->type = cpu_to_le16(PKT_PCLOSE);
- fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
+ init_completion(&SKB_CB(skb)->c);
- clear_bit(ATM_VF_ADDR, &vcc->flags);
- clear_bit(ATM_VF_READY, &vcc->flags);
+ fpga_queue(card, port, skb, NULL);
+
fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
clear_bit(ATM_VF_ADDR, &vcc->flags);
clear_bit(ATM_VF_READY, &vcc->flags);
+ if (!wait_for_completion_timeout(&SKB_CB(skb)->c,
+ msecs_to_jiffies(5000)))
+ if (!wait_for_completion_timeout(&SKB_CB(skb)->c, 5 * HZ))
+ dev_warn(&card->dev->dev, "Timeout waiting for VCC close on port %d\n",
+ SOLOS_CHAN(vcc->dev));
+
+ port);
/* Hold up vcc_destroy_socket() (our caller) until solos_bh() in the
tasklet has finished processing any incoming packets (and, more to
the point, using the vcc pointer). */
@@ -1011,9 +1020,12 @@ static uint32_t fpga_tx(struct solos_card *card)
tasklet_unlock_wait(&card->tlet);
+
+ clear_bit(ATM_VF_ADDR, &vcc->flags);
+
return;
}
@@ -1011,9 +989,12 @@ static uint32_t fpga_tx(struct solos_car
if (vcc) {
atomic_inc(&vcc->stats->tx);
solos_pop(vcc, oldskb);
@ -333,7 +467,16 @@ index 9851093..6258961 100644
}
}
/* For non-DMA TX, write the 'TX start' bit for all four ports simultaneously */
@@ -1345,6 +1357,8 @@ static struct pci_driver fpga_driver = {
@@ -1248,7 +1229,7 @@ static int atm_init(struct solos_card *c
card->atmdev[i]->phy_data = (void *)(unsigned long)i;
atm_dev_signal_change(card->atmdev[i], ATM_PHY_SIG_FOUND);
- skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
+ skb = alloc_skb(sizeof(*header), GFP_KERNEL);
if (!skb) {
dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
continue;
@@ -1345,6 +1326,8 @@ static struct pci_driver fpga_driver = {
static int __init solos_pci_init(void)
{
@ -342,8 +485,6 @@ index 9851093..6258961 100644
printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
return pci_register_driver(&fpga_driver);
}
diff --git a/include/linux/atmdev.h b/include/linux/atmdev.h
index 22ef21c..c1da539 100644
--- a/include/linux/atmdev.h
+++ b/include/linux/atmdev.h
@@ -99,6 +99,7 @@ struct atm_vcc {
@ -362,14 +503,13 @@ index 22ef21c..c1da539 100644
/* SVC part --- may move later ------------------------------------- */
short itf; /* interface number */
struct sockaddr_atmsvc local;
diff --git a/net/atm/br2684.c b/net/atm/br2684.c
index 4819d315..a4ee4ad 100644
--- a/net/atm/br2684.c
+++ b/net/atm/br2684.c
@@ -68,12 +68,14 @@ struct br2684_vcc {
@@ -68,12 +68,15 @@ struct br2684_vcc {
/* keep old push, pop functions for chaining */
void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb);
void (*old_pop)(struct atm_vcc *vcc, struct sk_buff *skb);
+ void (*old_release_cb)(struct atm_vcc *vcc);
+ struct module *old_owner;
enum br2684_encaps encaps;
struct list_head brvccs;
@ -381,7 +521,7 @@ index 4819d315..a4ee4ad 100644
};
struct br2684_dev {
@@ -181,18 +183,15 @@ static struct notifier_block atm_dev_notifier = {
@@ -181,18 +184,15 @@ static struct notifier_block atm_dev_not
static void br2684_pop(struct atm_vcc *vcc, struct sk_buff *skb)
{
struct br2684_vcc *brvcc = BR2684_VCC(vcc);
@ -405,18 +545,7 @@ index 4819d315..a4ee4ad 100644
/*
* Send a packet out a particular vcc. Not to useful right now, but paves
* the way for multiple vcc's per itf. Returns true if we can send,
@@ -251,21 +250,30 @@ static int br2684_xmit_vcc(struct sk_buff *skb, struct net_device *dev,
skb_debug(skb);
ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc;
+ if (test_bit(ATM_VF_RELEASED, &atmvcc->flags) ||
+ test_bit(ATM_VF_CLOSE, &atmvcc->flags) ||
+ !test_bit(ATM_VF_READY, &atmvcc->flags)) {
+ dev_kfree_skb(skb);
+ return 0;
+ }
pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev);
atomic_add(skb->truesize, &sk_atm(atmvcc)->sk_wmem_alloc);
@@ -256,16 +256,30 @@ static int br2684_xmit_vcc(struct sk_buf
ATM_SKB(skb)->atm_options = atmvcc->atm_options;
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
@ -439,12 +568,76 @@ index 4819d315..a4ee4ad 100644
+ will wake the queue if appropriate. Just return an error so that
+ the stats are updated correctly */
+ return !atmvcc->send(atmvcc, skb);
+}
+
+static void br2684_release_cb(struct atm_vcc *atmvcc)
+{
+ struct br2684_vcc *brvcc = BR2684_VCC(atmvcc);
+
+ if (atomic_read(&brvcc->qspace) > 0)
+ netif_wake_queue(brvcc->device);
+
+ if (brvcc->old_release_cb)
+ brvcc->old_release_cb(atmvcc);
}
static inline struct br2684_vcc *pick_outgoing_vcc(const struct sk_buff *skb,
@@ -378,8 +386,8 @@ static void br2684_close_vcc(struct br2684_vcc *brvcc)
@@ -279,6 +293,8 @@ static netdev_tx_t br2684_start_xmit(str
{
struct br2684_dev *brdev = BRPRIV(dev);
struct br2684_vcc *brvcc;
+ struct atm_vcc *atmvcc;
+ netdev_tx_t ret = NETDEV_TX_OK;
pr_debug("skb_dst(skb)=%p\n", skb_dst(skb));
read_lock(&devs_lock);
@@ -289,9 +305,26 @@ static netdev_tx_t br2684_start_xmit(str
dev->stats.tx_carrier_errors++;
/* netif_stop_queue(dev); */
dev_kfree_skb(skb);
- read_unlock(&devs_lock);
- return NETDEV_TX_OK;
+ goto out_devs;
}
+ atmvcc = brvcc->atmvcc;
+
+ bh_lock_sock(sk_atm(atmvcc));
+
+ if (test_bit(ATM_VF_RELEASED, &atmvcc->flags) ||
+ test_bit(ATM_VF_CLOSE, &atmvcc->flags) ||
+ !test_bit(ATM_VF_READY, &atmvcc->flags)) {
+ dev->stats.tx_dropped++;
+ dev_kfree_skb(skb);
+ goto out;
+ }
+
+ if (sock_owned_by_user(sk_atm(atmvcc))) {
+ netif_stop_queue(brvcc->device);
+ ret = NETDEV_TX_BUSY;
+ goto out;
+ }
+
if (!br2684_xmit_vcc(skb, dev, brvcc)) {
/*
* We should probably use netif_*_queue() here, but that
@@ -303,8 +336,11 @@ static netdev_tx_t br2684_start_xmit(str
dev->stats.tx_errors++;
dev->stats.tx_fifo_errors++;
}
+ out:
+ bh_unlock_sock(sk_atm(atmvcc));
+ out_devs:
read_unlock(&devs_lock);
- return NETDEV_TX_OK;
+ return ret;
}
/*
@@ -377,9 +413,10 @@ static void br2684_close_vcc(struct br26
list_del(&brvcc->brvccs);
write_unlock_irq(&devs_lock);
brvcc->atmvcc->user_back = NULL; /* what about vcc->recvq ??? */
+ brvcc->atmvcc->release_cb = brvcc->old_release_cb;
brvcc->old_push(brvcc->atmvcc, NULL); /* pass on the bad news */
+ module_put(brvcc->old_owner);
kfree(brvcc);
@ -452,7 +645,7 @@ index 4819d315..a4ee4ad 100644
}
/* when AAL5 PDU comes in: */
@@ -504,6 +512,13 @@ static int br2684_regvcc(struct atm_vcc *atmvcc, void __user * arg)
@@ -504,6 +541,13 @@ static int br2684_regvcc(struct atm_vcc
brvcc = kzalloc(sizeof(struct br2684_vcc), GFP_KERNEL);
if (!brvcc)
return -ENOMEM;
@ -466,19 +659,21 @@ index 4819d315..a4ee4ad 100644
write_lock_irq(&devs_lock);
net_dev = br2684_find_dev(&be.ifspec);
if (net_dev == NULL) {
@@ -546,9 +561,11 @@ static int br2684_regvcc(struct atm_vcc *atmvcc, void __user * arg)
@@ -546,9 +590,13 @@ static int br2684_regvcc(struct atm_vcc
brvcc->encaps = (enum br2684_encaps)be.encaps;
brvcc->old_push = atmvcc->push;
brvcc->old_pop = atmvcc->pop;
+ brvcc->old_release_cb = atmvcc->release_cb;
+ brvcc->old_owner = atmvcc->owner;
barrier();
atmvcc->push = br2684_push;
atmvcc->pop = br2684_pop;
+ atmvcc->release_cb = br2684_release_cb;
+ atmvcc->owner = THIS_MODULE;
/* initialize netdev carrier state */
if (atmvcc->dev->signal == ATM_PHY_SIG_LOST)
@@ -687,10 +704,13 @@ static int br2684_ioctl(struct socket *sock, unsigned int cmd,
@@ -687,10 +735,13 @@ static int br2684_ioctl(struct socket *s
return -ENOIOCTLCMD;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
@ -494,11 +689,9 @@ index 4819d315..a4ee4ad 100644
#ifdef CONFIG_ATM_BR2684_IPFILTER
case BR2684_SETFILT:
if (atmvcc->push != br2684_push)
diff --git a/net/atm/common.c b/net/atm/common.c
index 0c0ad93..806fc0a 100644
--- a/net/atm/common.c
+++ b/net/atm/common.c
@@ -126,10 +126,19 @@ static void vcc_write_space(struct sock *sk)
@@ -126,10 +126,19 @@ static void vcc_write_space(struct sock
rcu_read_unlock();
}
@ -518,7 +711,7 @@ index 0c0ad93..806fc0a 100644
};
int vcc_create(struct net *net, struct socket *sock, int protocol, int family)
@@ -156,7 +165,9 @@ int vcc_create(struct net *net, struct socket *sock, int protocol, int family)
@@ -156,7 +165,9 @@ int vcc_create(struct net *net, struct s
atomic_set(&sk->sk_rmem_alloc, 0);
vcc->push = NULL;
vcc->pop = NULL;
@ -528,7 +721,7 @@ index 0c0ad93..806fc0a 100644
vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */
vcc->atm_options = vcc->aal_options = 0;
sk->sk_destruct = vcc_sock_destruct;
@@ -175,6 +186,7 @@ static void vcc_destroy_socket(struct sock *sk)
@@ -175,6 +186,7 @@ static void vcc_destroy_socket(struct so
vcc->dev->ops->close(vcc);
if (vcc->push)
vcc->push(vcc, NULL); /* atmarpd has no push */
@ -536,8 +729,6 @@ index 0c0ad93..806fc0a 100644
while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
atm_return(vcc, skb->truesize);
diff --git a/net/atm/pppoatm.c b/net/atm/pppoatm.c
index 226dca9..8c93267 100644
--- a/net/atm/pppoatm.c
+++ b/net/atm/pppoatm.c
@@ -60,6 +60,8 @@ struct pppoatm_vcc {
@ -549,7 +740,7 @@ index 226dca9..8c93267 100644
/* keep old push/pop for detaching */
enum pppoatm_encaps encaps;
atomic_t inflight;
@@ -107,6 +109,24 @@ static void pppoatm_wakeup_sender(unsigned long arg)
@@ -107,6 +109,24 @@ static void pppoatm_wakeup_sender(unsign
ppp_output_wakeup((struct ppp_channel *) arg);
}
@ -574,7 +765,7 @@ index 226dca9..8c93267 100644
/*
* This gets called every time the ATM card has finished sending our
* skb. The ->old_pop will take care up normal atm flow control,
@@ -151,12 +171,11 @@ static void pppoatm_unassign_vcc(struct atm_vcc *atmvcc)
@@ -151,12 +171,11 @@ static void pppoatm_unassign_vcc(struct
pvcc = atmvcc_to_pvcc(atmvcc);
atmvcc->push = pvcc->old_push;
atmvcc->pop = pvcc->old_pop;
@ -588,7 +779,7 @@ index 226dca9..8c93267 100644
}
/* Called when an AAL5 PDU comes in */
@@ -165,9 +184,13 @@ static void pppoatm_push(struct atm_vcc *atmvcc, struct sk_buff *skb)
@@ -165,9 +184,13 @@ static void pppoatm_push(struct atm_vcc
struct pppoatm_vcc *pvcc = atmvcc_to_pvcc(atmvcc);
pr_debug("\n");
if (skb == NULL) { /* VCC was closed */
@ -611,7 +802,7 @@ index 226dca9..8c93267 100644
{
/*
* It's not clear that we need to bother with using atm_may_send()
@@ -269,10 +292,33 @@ static inline int pppoatm_may_send(struct pppoatm_vcc *pvcc, int size)
@@ -269,10 +292,33 @@ static inline int pppoatm_may_send(struc
static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb)
{
struct pppoatm_vcc *pvcc = chan_to_pvcc(chan);
@ -645,7 +836,7 @@ index 226dca9..8c93267 100644
switch (pvcc->encaps) { /* LLC encapsulation needed */
case e_llc:
if (skb_headroom(skb) < LLC_LEN) {
@@ -285,8 +331,10 @@ static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb)
@@ -285,8 +331,10 @@ static int pppoatm_send(struct ppp_chann
}
consume_skb(skb);
skb = n;
@ -657,7 +848,7 @@ index 226dca9..8c93267 100644
} else if (!pppoatm_may_send(pvcc, skb->truesize))
goto nospace;
memcpy(skb_push(skb, LLC_LEN), pppllc, LLC_LEN);
@@ -296,6 +344,7 @@ static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb)
@@ -296,6 +344,7 @@ static int pppoatm_send(struct ppp_chann
goto nospace;
break;
case e_autodetect:
@ -665,7 +856,7 @@ index 226dca9..8c93267 100644
pr_debug("Trying to send without setting encaps!\n");
kfree_skb(skb);
return 1;
@@ -305,9 +354,12 @@ static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb)
@@ -305,9 +354,12 @@ static int pppoatm_send(struct ppp_chann
ATM_SKB(skb)->atm_options = ATM_SKB(skb)->vcc->atm_options;
pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n",
skb, ATM_SKB(skb)->vcc, ATM_SKB(skb)->vcc->dev);
@ -679,7 +870,7 @@ index 226dca9..8c93267 100644
/*
* We don't have space to send this SKB now, but we might have
* already applied SC_COMP_PROT compression, so may need to undo
@@ -362,6 +414,8 @@ static int pppoatm_assign_vcc(struct atm_vcc *atmvcc, void __user *arg)
@@ -362,6 +414,8 @@ static int pppoatm_assign_vcc(struct atm
atomic_set(&pvcc->inflight, NONE_INFLIGHT);
pvcc->old_push = atmvcc->push;
pvcc->old_pop = atmvcc->pop;
@ -688,7 +879,7 @@ index 226dca9..8c93267 100644
pvcc->encaps = (enum pppoatm_encaps) be.encaps;
pvcc->chan.private = pvcc;
pvcc->chan.ops = &pppoatm_ops;
@@ -377,7 +431,9 @@ static int pppoatm_assign_vcc(struct atm_vcc *atmvcc, void __user *arg)
@@ -377,7 +431,9 @@ static int pppoatm_assign_vcc(struct atm
atmvcc->user_back = pvcc;
atmvcc->push = pppoatm_push;
atmvcc->pop = pppoatm_pop;
@ -698,7 +889,7 @@ index 226dca9..8c93267 100644
/* re-process everything received between connection setup and
backend setup */
@@ -406,6 +462,8 @@ static int pppoatm_ioctl(struct socket *sock, unsigned int cmd,
@@ -406,6 +462,8 @@ static int pppoatm_ioctl(struct socket *
return -ENOIOCTLCMD;
if (!capable(CAP_NET_ADMIN))
return -EPERM;