/* SCTP kernel implementation * Copyright (c) 2003 International Business Machines, Corp. * * This file is part of the SCTP kernel implementation * * These functions manipulate sctp SSN tracker. * * This SCTP implementation 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; either version 2, or (at your option) * any later version. * * This SCTP implementation is distributed in the hope that it * will be useful, but WITHOUT ANY WARRANTY; without even the implied * ************************ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with GNU CC; see the file COPYING. If not, see * . * * Please send any bug reports or fixes you make to the * email address(es): * lksctp developers * * Written or modified by: * Jon Grimm */ #include #include #include #include static struct sctp_ssnmap *sctp_ssnmap_init(struct sctp_ssnmap *map, __u16 in, __u16 out); /* Storage size needed for map includes 2 headers and then the * specific needs of in or out streams. */ static inline size_t sctp_ssnmap_size(__u16 in, __u16 out) { return sizeof(struct sctp_ssnmap) + (in + out) * sizeof(__u16); } /* Create a new sctp_ssnmap. * Allocate room to store at least 'len' contiguous TSNs. */ struct sctp_ssnmap *sctp_ssnmap_new(__u16 in, __u16 out, gfp_t gfp) { struct sctp_ssnmap *retval; int size; size = sctp_ssnmap_size(in, out); if (size <= KMALLOC_MAX_SIZE) retval = kmalloc(size, gfp); else retval = (struct sctp_ssnmap *) __get_free_pages(gfp, get_order(size)); if (!retval) goto fail; if (!sctp_ssnmap_init(retval, in, out)) goto fail_map; SCTP_DBG_OBJCNT_INC(ssnmap); return retval; fail_map: if (size <= KMALLOC_MAX_SIZE) kfree(retval); else free_pages((unsigned long)retval, get_order(size)); fail: return NULL; } /* Initialize a block of memory as a ssnmap. */ static struct sctp_ssnmap *sctp_ssnmap_init(struct sctp_ssnmap *map, __u16 in, __u16 out) { memset(map, 0x00, sctp_ssnmap_size(in, out)); /* Start 'in' stream just after the map header. */ map->in.ssn = (__u16 *)&map[1]; map->in.len = in; /* Start 'out' stream just after 'in'. */ map->out.ssn = &map->in.ssn[in]; map->out.len = out; return map; } /* Clear out the ssnmap streams. */ void sctp_ssnmap_clear(struct sctp_ssnmap *map) { size_t size; size = (map->in.len + map->out.len) * sizeof(__u16); memset(map->in.ssn, 0x00, size); } /* Dispose of a ssnmap. */ void sctp_ssnmap_free(struct sctp_ssnmap *map) { int size; if (unlikely(!map)) return; size = sctp_ssnmap_size(map->in.len, map->out.len); if (size <= KMALLOC_MAX_SIZE) kfree(map); else free_pages((unsigned long)map, get_order(size)); SCTP_DBG_OBJCNT_DEC(ssnmap); } 6b22cf805011620f546384b271586548e8a7&showmsg=1'>Expand)AuthorFilesLines 2017-02-02net: add LINUX_MIB_PFMEMALLOCDROP counterEric Dumazet2-2/+4 2017-02-02net: ipv4: remove fib_lookup.h from devinet.c include listDavid Ahern1-2/+0 2017-02-02net: remove useless pfmemalloc settingEric Dumazet1-1/+0 2017-02-02unix: add ioctl to open a unix socket file with O_PATHAndrey Vagin1-0/+41 2017-02-02Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller12-104/+93 2017-02-01Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds10-103/+86 2017-02-01net/sched: act_psample: Remove unnecessary ASSERT_RTNLYotam Gigi1-1/+0 2017-02-01net/sched: act_sample: Fix error path in initYotam Gigi1-1/+4 2017-02-01tcp: fix 0 divide in __tcp_select_window()Eric Dumazet1-2/+4 2017-02-01ipv6: pointer math error in ip6_tnl_parse_tlv_enc_lim()Dan Carpenter1-1/+1 2017-02-01net: ipv6: add NLM_F_APPEND in notifications when applicableDavid Ahern1-0/+3 2017-02-01net: reduce skb_warn_bad_offload() noiseEric Dumazet1-3/+9 2017-02-01net/sched: matchall: Fix configuration raceYotam Gigi1-82/+45 2017-02-01rtnetlink: Handle IFLA_MASTER parameter when processing rtnl_newlinkTheuns Verwoerd1-1/+6