mirror of https://github.com/proski/madwifi
193 lines
7.4 KiB
C
193 lines
7.4 KiB
C
/*-
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* Copyright (c) 2007 Michael Taylor, Apprion
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: ieee80211_skb.h 2647 2007-08-09 08:43:58Z mtaylor $
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*/
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#ifndef _NET80211_IEEE80211_SKB_H_
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#define _NET80211_IEEE80211_SKB_H_
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/*******************************************************************************
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* Public API
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******************************************************************************/
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/* SKB_XX(...) macros will blow up if _skb is NULL (detect problems early) */
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#define SKB_CB(_skb) ((struct ieee80211_cb *)(_skb)->cb)
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#define SKB_NI(_skb) (SKB_CB(_skb)->ni)
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#define M_FLAG_SET(_skb, _flag) \
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(SKB_CB(_skb)->flags |= (_flag))
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#define M_FLAG_CLR(_skb, _flag) \
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(SKB_CB(_skb)->flags &= ~(_flag))
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#define M_FLAG_GET(_skb, _flag) \
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(SKB_CB(_skb)->flags & (_flag))
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#define M_FLAG_KEEP_ONLY(_skb, _flag) \
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(SKB_CB(_skb)->flags &= (_flag))
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#define M_PWR_SAV_SET(skb) M_FLAG_SET((skb), M_PWR_SAV)
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#define M_PWR_SAV_CLR(skb) M_FLAG_CLR((skb), M_PWR_SAV)
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#define M_PWR_SAV_GET(skb) M_FLAG_GET((skb), M_PWR_SAV)
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/* SKBs on the power save queue are tagged with an age and
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* timed out. We reuse the hardware checksum field in the
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* mbuf packet header to store this data.
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* XXX: use private CB area. */
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
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#define skb_age csum_offset
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#else
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#define skb_age csum
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#endif
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#define M_AGE_SET(_skb,_v) ((_skb)->skb_age = (_v))
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#define M_AGE_GET(_skb) ((_skb)->skb_age)
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#define M_AGE_SUB(_skb,_adj) ((_skb)->skb_age -= (_adj))
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/* ieee80211_dev_kfree_skb will release one reference from SKB.
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* If SKB refcount is going to zero:
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* - Free the node reference and set it to null.
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* - Break the linked list, clearing next skb's prev pointer if possible. */
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void ieee80211_dev_kfree_skb(struct sk_buff **pskb);
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static inline void ieee80211_skb_copy_noderef(struct sk_buff *src,
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struct sk_buff *dst)
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{
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if (SKB_NI(src) != NULL)
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SKB_NI(dst) = ieee80211_ref_node(SKB_NI(src));
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}
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/* ieee80211_dev_kfree_skb_list will invoke ieee80211_dev_kfree_skb on each node in
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* a list of skbs, starting with the first. */
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void ieee80211_dev_kfree_skb_list(struct sk_buff **pskb);
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struct sk_buff *ieee80211_dev_alloc_skb(int size);
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void ieee80211_skb_track(struct sk_buff *skb);
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void ieee80211_skb_untrack(struct sk_buff *skb);
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#ifdef IEEE80211_DEBUG_REFCNT
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int ieee80211_skb_counter(void);
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int ieee80211_skb_references(void);
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#else
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#define ieee80211_skb_counter() (0)
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#define ieee80211_skb_references() (0)
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#endif
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/*******************************************************************************
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* skbuff leak/refcount debugging Replacement Functions
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******************************************************************************/
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#ifdef IEEE80211_DEBUG_REFCNT
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#if IEEE80211_VLAN_TAG_USED
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int vlan_hwaccel_rx_debug(struct sk_buff *skb, struct vlan_group *grp,
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unsigned short vlan_tag, const char *func, int line);
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#endif
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int netif_rx_debug(struct sk_buff *skb, const char *func, int line);
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struct sk_buff *alloc_skb_debug(unsigned int length, gfp_t gfp_mask,
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const char *func, int line);
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struct sk_buff *dev_alloc_skb_debug(unsigned int length,
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const char *func, int line);
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struct sk_buff *skb_clone_debug(struct sk_buff *skb, gfp_t pri,
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const char *func, int line);
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struct sk_buff *skb_copy_debug(struct sk_buff *skb, gfp_t pri,
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const char *func, int line);
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struct sk_buff *skb_get_debug(struct sk_buff *skb,
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const char *func, int line);
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struct sk_buff *skb_realloc_headroom_debug(struct sk_buff *skb, unsigned int headroom,
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const char *func, int line);
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struct sk_buff *pskb_copy_debug(struct sk_buff *skb, gfp_t pri,
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const char *func, int line);
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int dev_queue_xmit_debug(struct sk_buff *skb,
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const char *func, int line);
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struct sk_buff *skb_share_check_debug(struct sk_buff *skb, gfp_t pri,
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const char *func, int line);
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void kfree_skb_fast_debug(struct sk_buff *skb,
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const char *func, int line);
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struct sk_buff *skb_unshare_debug(struct sk_buff *skb, gfp_t pri,
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const char *func, int line);
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struct sk_buff *skb_copy_expand_debug(const struct sk_buff *skb, int newheadroom,
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int newtailroom, gfp_t gfp_mask,
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const char *func, int line);
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#undef alloc_skb
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#undef dev_alloc_skb
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#undef dev_kfree_skb
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#undef dev_kfree_skb_any
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#undef dev_kfree_skb_irq
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#undef dev_queue_xmit
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#undef kfree_skb
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#undef kfree_skb_fast
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#undef netif_rx
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#undef pskb_copy
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#undef skb_clone
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#undef skb_copy
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#undef skb_copy_expand
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#undef skb_get
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#undef skb_realloc_headroom
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#undef skb_share_check
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#undef skb_unshare
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#undef vlan_hwaccel_rx
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#define skb_unshare(_skb, _pri) \
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skb_unshare_debug(_skb, _pri, __func__, __LINE__)
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#define skb_copy_expand(_skb, _newheadroom, _newtailroom, _gfp_mask) \
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skb_copy_expand_debug(_skb, _newheadroom, _newtailroom, _gfp_mask, __func__, __LINE__)
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#define vlan_hwaccel_rx(_skb, _grp, _tag) \
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vlan_hwaccel_rx_debug(_skb, _grp, _tag, __func__, __LINE__)
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#define netif_rx(_skb) \
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netif_rx_debug(_skb, __func__, __LINE__)
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#define alloc_skb(_length, _gfp_mask) \
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alloc_skb_debug(_length, _gfp_mask, __func__, __LINE__)
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#define dev_alloc_skb(_length) \
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dev_alloc_skb_debug(_length, __func__, __LINE__)
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#define dev_kfree_skb_irq(_skb) \
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unref_skb(_skb, UNREF_USE_DEV_KFREE_SKB_IRQ, __func__, __LINE__)
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#define dev_kfree_skb_any(_skb) \
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unref_skb(_skb, UNREF_USE_DEV_KFREE_SKB_ANY, __func__, __LINE__)
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#define dev_kfree_skb(_skb) \
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unref_skb(_skb, UNREF_USE_DEV_KFREE_SKB, __func__, __LINE__)
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#define kfree_skb(_skb) \
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unref_skb(_skb, UNREF_USE_KFREE_SKB, __func__, __LINE__)
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#define skb_clone(_skb, _pri) \
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skb_clone_debug(_skb, _pri, __func__, __LINE__)
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#define skb_share_check(_skb, _pri) \
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skb_share_check_debug(_skb, _pri, __func__, __LINE__)
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#define kfree_skb_fast(_skb) \
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kfree_skb_fast_debug(_skb, __func__, __LINE__)
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#define skb_realloc_headroom(_skb, _headroom) \
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skb_realloc_headroom_debug(_skb, _headroom, __func__, __LINE__)
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#define pskb_copy(_skb, _pri) \
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pskb_copy_debug(_skb, _pri, __func__, __LINE__)
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#define skb_get(_skb) \
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skb_get_debug(_skb, __func__, __LINE__)
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#define skb_copy(_skb, _pri) \
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skb_copy_debug(_skb, _pri, __func__, __LINE__)
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#define dev_queue_xmit(_skb) \
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dev_queue_xmit_debug(_skb, __func__, __LINE__)
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#endif /* #ifdef IEEE80211_DEBUG_REFCNT */
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#endif /* _NET80211_IEEE80211_SKB_H_ */
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