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authorLinus Torvalds <torvalds@linux-foundation.org>2011-10-25 13:25:22 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2011-10-25 13:25:22 +0200
commit8a9ea3237e7eb5c25f09e429ad242ae5a3d5ea22 (patch)
treea0a63398a9983667d52cbbbf4e2405b4f22b1d83 /net/xfrm/xfrm_replay.c
parent1be025d3cb40cd295123af2c394f7229ef9b30ca (diff)
parent8b3408f8ee994973869d8ba32c5bf482bc4ddca4 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1745 commits) dp83640: free packet queues on remove dp83640: use proper function to free transmit time stamping packets ipv6: Do not use routes from locally generated RAs |PATCH net-next] tg3: add tx_dropped counter be2net: don't create multiple RX/TX rings in multi channel mode be2net: don't create multiple TXQs in BE2 be2net: refactor VF setup/teardown code into be_vf_setup/clear() be2net: add vlan/rx-mode/flow-control config to be_setup() net_sched: cls_flow: use skb_header_pointer() ipv4: avoid useless call of the function check_peer_pmtu TCP: remove TCP_DEBUG net: Fix driver name for mdio-gpio.c ipv4: tcp: fix TOS value in ACK messages sent from TIME_WAIT rtnetlink: Add missing manual netlink notification in dev_change_net_namespaces ipv4: fix ipsec forward performance regression jme: fix irq storm after suspend/resume route: fix ICMP redirect validation net: hold sock reference while processing tx timestamps tcp: md5: add more const attributes Add ethtool -g support to virtio_net ... Fix up conflicts in: - drivers/net/Kconfig: The split-up generated a trivial conflict with removal of a stale reference to Documentation/networking/net-modules.txt. Remove it from the new location instead. - fs/sysfs/dir.c: Fairly nasty conflicts with the sysfs rb-tree usage, conflicting with Eric Biederman's changes for tagged directories.
Diffstat (limited to 'net/xfrm/xfrm_replay.c')
-rw-r--r--net/xfrm/xfrm_replay.c98
1 files changed, 34 insertions, 64 deletions
diff --git a/net/xfrm/xfrm_replay.c b/net/xfrm/xfrm_replay.c
index b11ea692bd7..6ca357406ea 100644
--- a/net/xfrm/xfrm_replay.c
+++ b/net/xfrm/xfrm_replay.c
@@ -203,8 +203,6 @@ static int xfrm_replay_check_bmp(struct xfrm_state *x,
if (!replay_esn->replay_window)
return 0;
- pos = (replay_esn->seq - 1) % replay_esn->replay_window;
-
if (unlikely(seq == 0))
goto err;
@@ -216,19 +214,18 @@ static int xfrm_replay_check_bmp(struct xfrm_state *x,
goto err;
}
- if (pos >= diff) {
+ pos = (replay_esn->seq - 1) % replay_esn->replay_window;
+
+ if (pos >= diff)
bitnr = (pos - diff) % replay_esn->replay_window;
- nr = bitnr >> 5;
- bitnr = bitnr & 0x1F;
- if (replay_esn->bmp[nr] & (1U << bitnr))
- goto err_replay;
- } else {
+ else
bitnr = replay_esn->replay_window - (diff - pos);
- nr = bitnr >> 5;
- bitnr = bitnr & 0x1F;
- if (replay_esn->bmp[nr] & (1U << bitnr))
- goto err_replay;
- }
+
+ nr = bitnr >> 5;
+ bitnr = bitnr & 0x1F;
+ if (replay_esn->bmp[nr] & (1U << bitnr))
+ goto err_replay;
+
return 0;
err_replay:
@@ -259,39 +256,27 @@ static void xfrm_replay_advance_bmp(struct xfrm_state *x, __be32 net_seq)
bitnr = bitnr & 0x1F;
replay_esn->bmp[nr] &= ~(1U << bitnr);
}
-
- bitnr = (pos + diff) % replay_esn->replay_window;
- nr = bitnr >> 5;
- bitnr = bitnr & 0x1F;
- replay_esn->bmp[nr] |= (1U << bitnr);
} else {
nr = (replay_esn->replay_window - 1) >> 5;
for (i = 0; i <= nr; i++)
replay_esn->bmp[i] = 0;
-
- bitnr = (pos + diff) % replay_esn->replay_window;
- nr = bitnr >> 5;
- bitnr = bitnr & 0x1F;
- replay_esn->bmp[nr] |= (1U << bitnr);
}
+ bitnr = (pos + diff) % replay_esn->replay_window;
replay_esn->seq = seq;
} else {
diff = replay_esn->seq - seq;
- if (pos >= diff) {
+ if (pos >= diff)
bitnr = (pos - diff) % replay_esn->replay_window;
- nr = bitnr >> 5;
- bitnr = bitnr & 0x1F;
- replay_esn->bmp[nr] |= (1U << bitnr);
- } else {
+ else
bitnr = replay_esn->replay_window - (diff - pos);
- nr = bitnr >> 5;
- bitnr = bitnr & 0x1F;
- replay_esn->bmp[nr] |= (1U << bitnr);
- }
}
+ nr = bitnr >> 5;
+ bitnr = bitnr & 0x1F;
+ replay_esn->bmp[nr] |= (1U << bitnr);
+
if (xfrm_aevent_is_on(xs_net(x)))
xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
}
@@ -390,8 +375,6 @@ static int xfrm_replay_check_esn(struct xfrm_state *x,
if (!wsize)
return 0;
- pos = (replay_esn->seq - 1) % replay_esn->replay_window;
-
if (unlikely(seq == 0 && replay_esn->seq_hi == 0 &&
(replay_esn->seq < replay_esn->replay_window - 1)))
goto err;
@@ -415,19 +398,18 @@ static int xfrm_replay_check_esn(struct xfrm_state *x,
goto err;
}
- if (pos >= diff) {
+ pos = (replay_esn->seq - 1) % replay_esn->replay_window;
+
+ if (pos >= diff)
bitnr = (pos - diff) % replay_esn->replay_window;
- nr = bitnr >> 5;
- bitnr = bitnr & 0x1F;
- if (replay_esn->bmp[nr] & (1U << bitnr))
- goto err_replay;
- } else {
+ else
bitnr = replay_esn->replay_window - (diff - pos);
- nr = bitnr >> 5;
- bitnr = bitnr & 0x1F;
- if (replay_esn->bmp[nr] & (1U << bitnr))
- goto err_replay;
- }
+
+ nr = bitnr >> 5;
+ bitnr = bitnr & 0x1F;
+ if (replay_esn->bmp[nr] & (1U << bitnr))
+ goto err_replay;
+
return 0;
err_replay:
@@ -465,22 +447,13 @@ static void xfrm_replay_advance_esn(struct xfrm_state *x, __be32 net_seq)
bitnr = bitnr & 0x1F;
replay_esn->bmp[nr] &= ~(1U << bitnr);
}
-
- bitnr = (pos + diff) % replay_esn->replay_window;
- nr = bitnr >> 5;
- bitnr = bitnr & 0x1F;
- replay_esn->bmp[nr] |= (1U << bitnr);
} else {
nr = (replay_esn->replay_window - 1) >> 5;
for (i = 0; i <= nr; i++)
replay_esn->bmp[i] = 0;
-
- bitnr = (pos + diff) % replay_esn->replay_window;
- nr = bitnr >> 5;
- bitnr = bitnr & 0x1F;
- replay_esn->bmp[nr] |= (1U << bitnr);
}
+ bitnr = (pos + diff) % replay_esn->replay_window;
replay_esn->seq = seq;
if (unlikely(wrap > 0))
@@ -488,19 +461,16 @@ static void xfrm_replay_advance_esn(struct xfrm_state *x, __be32 net_seq)
} else {
diff = replay_esn->seq - seq;
- if (pos >= diff) {
+ if (pos >= diff)
bitnr = (pos - diff) % replay_esn->replay_window;
- nr = bitnr >> 5;
- bitnr = bitnr & 0x1F;
- replay_esn->bmp[nr] |= (1U << bitnr);
- } else {
+ else
bitnr = replay_esn->replay_window - (diff - pos);
- nr = bitnr >> 5;
- bitnr = bitnr & 0x1F;
- replay_esn->bmp[nr] |= (1U << bitnr);
- }
}
+ nr = bitnr >> 5;
+ bitnr = bitnr & 0x1F;
+ replay_esn->bmp[nr] |= (1U << bitnr);
+
if (xfrm_aevent_is_on(xs_net(x)))
xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
}