/* * net/ife/ife.c - Inter-FE protocol based on ForCES WG InterFE LFB * Copyright (c) 2015 Jamal Hadi Salim * Copyright (c) 2017 Yotam Gigi * * Refer to: draft-ietf-forces-interfelfb-03 and netdev01 paper: * "Distributing Linux Traffic Control Classifier-Action Subsystem" * Authors: Jamal Hadi Salim and Damascene M. Joachimpillai * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include #include struct ifeheadr { __be16 metalen; u8 tlv_data[]; }; void *ife_encode(struct sk_buff *skb, u16 metalen) { /* OUTERHDR:TOTMETALEN:{TLVHDR:Metadatum:TLVHDR..}:ORIGDATA * where ORIGDATA = original ethernet header ... */ int hdrm = metalen + IFE_METAHDRLEN; int total_push = hdrm + skb->dev->hard_header_len; struct ifeheadr *ifehdr; struct ethhdr *iethh; /* inner ether header */ int skboff = 0; int err; err = skb_cow_head(skb, total_push); if (unlikely(err)) return NULL; iethh = (struct ethhdr *) skb->data; __skb_push(skb, total_push); memcpy(skb->data, iethh, skb->dev->hard_header_len); skb_reset_mac_header(skb); skboff += skb->dev->hard_header_len; /* total metadata length */ ifehdr = (struct ifeheadr *) (skb->data + skboff); metalen += IFE_METAHDRLEN; ifehdr->metalen = htons(metalen); return ifehdr->tlv_data; } EXPORT_SYMBOL_GPL(ife_encode); void *ife_decode(struct sk_buff *skb, u16 *metalen) { struct ifeheadr *ifehdr; int total_pull; u16 ifehdrln; ifehdr = (struct ifeheadr *) (skb->data + skb->dev->hard_header_len); ifehdrln = ntohs(ifehdr->metalen); total_pull = skb->dev->hard_header_len + ifehdrln; if (unlikely(ifehdrln < 2)) return NULL; if (unlikely(!pskb_may_pull(skb, total_pull))) return NULL; skb_set_mac_header(skb, total_pull); __skb_pull(skb, total_pull); *metalen = ifehdrln - IFE_METAHDRLEN; return &ifehdr->tlv_data; } EXPORT_SYMBOL_GPL(ife_decode); struct meta_tlvhdr { __be16 type; __be16 len; }; /* Caller takes care of presenting data in network order */ void *ife_tlv_meta_decode(void *skbdata, u16 *attrtype, u16 *dlen, u16 *totlen) { struct meta_tlvhdr *tlv = (struct meta_tlvhdr *) skbdata; *dlen = ntohs(tlv->len) - NLA_HDRLEN; *attrtype = ntohs(tlv->type); if (totlen) *totlen = nla_total_size(*dlen); return skbdata + sizeof(struct meta_tlvhdr); } EXPORT_SYMBOL_GPL(ife_tlv_meta_decode); void *ife_tlv_meta_next(void *skbdata) { struct meta_tlvhdr *tlv = (struct meta_tlvhdr *) skbdata; u16 tlvlen = ntohs(tlv->len); tlvlen = NLA_ALIGN(tlvlen); return skbdata + tlvlen; } EXPORT_SYMBOL_GPL(ife_tlv_meta_next); /* Caller takes care of presenting data in network order */ int ife_tlv_meta_encode(void *skbdata, u16 attrtype, u16 dlen, const void *dval) { __be32 *tlv = (__be32 *) (skbdata); u16 totlen = nla_total_size(dlen); /*alignment + hdr */ char *dptr = (char *) tlv + NLA_HDRLEN; u32 htlv = attrtype << 16 | (dlen + NLA_HDRLEN); *tlv = htonl(htlv); memset(dptr, 0, totlen - NLA_HDRLEN); memcpy(dptr, dval, dlen); return totlen; } EXPORT_SYMBOL_GPL(ife_tlv_meta_encode); MODULE_AUTHOR("Jamal Hadi Salim "); MODULE_AUTHOR("Yotam Gigi "); MODULE_DESCRIPTION("Inter-FE LFB action"); MODULE_LICENSE("GPL"); >space:mode:
authorJohan Hovold <johan@kernel.org>2017-01-30 11:26:38 +0100
committerJiri Kosina <jkosina@suse.cz>2017-01-31 12:59:32 +0100
commit7a7b5df84b6b4e5d599c7289526eed96541a0654 (patch)
treecf7514c7ddf4410fe37ca9099a2785e1cf08fa7d /net/ax25/Makefile
parent877a021e08ccb6434718c0cc781fdf943c884cc0 (diff)
HID: cp2112: fix sleep-while-atomic
A recent commit fixing DMA-buffers on stack added a shared transfer buffer protected by a spinlock. This is broken as the USB HID request callbacks can sleep. Fix this up by replacing the spinlock with a mutex. Fixes: 1ffb3c40ffb5 ("HID: cp2112: make transfer buffers DMA capable") Cc: stable <stable@vger.kernel.org> # 4.9 Signed-off-by: Johan Hovold <johan@kernel.org> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'net/ax25/Makefile')