diff options
| author | Richard Gobert <richardbgobert@gmail.com> | 2022-09-28 14:55:31 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-09-30 12:31:46 +0100 |
| commit | d427c8999b071af2003203b42a007c4a80156c18 (patch) | |
| tree | 60f7796211722aabd9ef73237e93d29c0177dcdb | |
| parent | 96e0718165a0d36ed4cba365c542818f20bf7640 (diff) | |
net-next: skbuff: refactor pskb_pull
pskb_may_pull already contains all of the checks performed by
pskb_pull.
Use pskb_may_pull for validation in pskb_pull, eliminating the
duplication and making __pskb_pull obsolete.
Replace __pskb_pull with pskb_pull where applicable.
Signed-off-by: Richard Gobert <richardbgobert@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/linux/skbuff.h | 23 | ||||
| -rw-r--r-- | net/ipv6/ip6_offload.c | 2 | ||||
| -rw-r--r-- | net/mac80211/rx.c | 4 | ||||
| -rw-r--r-- | net/xfrm/espintcp.c | 2 |
4 files changed, 13 insertions, 18 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 920eb6413fee..9fcf534f2d92 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2616,20 +2616,6 @@ void *skb_pull_data(struct sk_buff *skb, size_t len); void *__pskb_pull_tail(struct sk_buff *skb, int delta); -static inline void *__pskb_pull(struct sk_buff *skb, unsigned int len) -{ - if (len > skb_headlen(skb) && - !__pskb_pull_tail(skb, len - skb_headlen(skb))) - return NULL; - skb->len -= len; - return skb->data += len; -} - -static inline void *pskb_pull(struct sk_buff *skb, unsigned int len) -{ - return unlikely(len > skb->len) ? NULL : __pskb_pull(skb, len); -} - static inline bool pskb_may_pull(struct sk_buff *skb, unsigned int len) { if (likely(len <= skb_headlen(skb))) @@ -2639,6 +2625,15 @@ static inline bool pskb_may_pull(struct sk_buff *skb, unsigned int len) return __pskb_pull_tail(skb, len - skb_headlen(skb)) != NULL; } +static inline void *pskb_pull(struct sk_buff *skb, unsigned int len) +{ + if (!pskb_may_pull(skb, len)) + return NULL; + + skb->len -= len; + return skb->data += len; +} + void skb_condense(struct sk_buff *skb); /** diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c index f00fd67fd0c4..3ee345672849 100644 --- a/net/ipv6/ip6_offload.c +++ b/net/ipv6/ip6_offload.c @@ -232,7 +232,7 @@ INDIRECT_CALLABLE_SCOPE struct sk_buff *ipv6_gro_receive(struct list_head *head, proto = iph->nexthdr; ops = rcu_dereference(inet6_offloads[proto]); if (!ops || !ops->callbacks.gro_receive) { - __pskb_pull(skb, skb_gro_offset(skb)); + pskb_pull(skb, skb_gro_offset(skb)); skb_gro_frag0_invalidate(skb); proto = ipv6_gso_pull_exthdrs(skb, proto); skb_gro_pull(skb, -skb_transport_offset(skb)); diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 511c809e2c6b..44474889e8e4 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -49,7 +49,7 @@ static struct sk_buff *ieee80211_clean_skb(struct sk_buff *skb, if (present_fcs_len) __pskb_trim(skb, skb->len - present_fcs_len); - __pskb_pull(skb, rtap_space); + pskb_pull(skb, rtap_space); hdr = (void *)skb->data; fc = hdr->frame_control; @@ -74,7 +74,7 @@ static struct sk_buff *ieee80211_clean_skb(struct sk_buff *skb, memmove(skb->data + IEEE80211_HT_CTL_LEN, skb->data, hdrlen - IEEE80211_HT_CTL_LEN); - __pskb_pull(skb, IEEE80211_HT_CTL_LEN); + pskb_pull(skb, IEEE80211_HT_CTL_LEN); return skb; } diff --git a/net/xfrm/espintcp.c b/net/xfrm/espintcp.c index 974eb97b77d2..29a540dcb5a7 100644 --- a/net/xfrm/espintcp.c +++ b/net/xfrm/espintcp.c @@ -91,7 +91,7 @@ static void espintcp_rcv(struct strparser *strp, struct sk_buff *skb) } /* remove header, leave non-ESP marker/SPI */ - if (!__pskb_pull(skb, rxm->offset + 2)) { + if (!pskb_pull(skb, rxm->offset + 2)) { XFRM_INC_STATS(sock_net(strp->sk), LINUX_MIB_XFRMINERROR); kfree_skb(skb); return; |