From: Parthasarathy Bhuvaragan Date: Fri, 13 Jan 2017 14:46:25 +0000 (+0100) Subject: tipc: allocate user memory with GFP_KERNEL flag X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=57d5f64d83ab5b5a5118b1597386dd76eaf4340d;p=linux-beck.git tipc: allocate user memory with GFP_KERNEL flag Until now, we allocate memory always with GFP_ATOMIC flag. When the system is under memory pressure and a user tries to send, the send fails due to low memory. However, the user application can wait for free memory if we allocate it using GFP_KERNEL flag. In this commit, we use allocate memory with GFP_KERNEL for all user allocation. Reported-by: Rune Torgersen Acked-by: Jon Maloy Signed-off-by: Parthasarathy Bhuvaragan Signed-off-by: David S. Miller --- diff --git a/net/tipc/discover.c b/net/tipc/discover.c index 6b109a808d4c..02462d67d191 100644 --- a/net/tipc/discover.c +++ b/net/tipc/discover.c @@ -169,7 +169,7 @@ void tipc_disc_rcv(struct net *net, struct sk_buff *skb, /* Send response, if necessary */ if (respond && (mtyp == DSC_REQ_MSG)) { - rskb = tipc_buf_acquire(MAX_H_SIZE); + rskb = tipc_buf_acquire(MAX_H_SIZE, GFP_ATOMIC); if (!rskb) return; tipc_disc_init_msg(net, rskb, DSC_RESP_MSG, bearer); @@ -278,7 +278,7 @@ int tipc_disc_create(struct net *net, struct tipc_bearer *b, req = kmalloc(sizeof(*req), GFP_ATOMIC); if (!req) return -ENOMEM; - req->buf = tipc_buf_acquire(MAX_H_SIZE); + req->buf = tipc_buf_acquire(MAX_H_SIZE, GFP_ATOMIC); if (!req->buf) { kfree(req); return -ENOMEM; diff --git a/net/tipc/link.c b/net/tipc/link.c index bda89bf9f4ff..4e8647aef01c 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -1395,7 +1395,7 @@ tnl: msg_set_seqno(hdr, seqno++); pktlen = msg_size(hdr); msg_set_size(&tnlhdr, pktlen + INT_H_SIZE); - tnlskb = tipc_buf_acquire(pktlen + INT_H_SIZE); + tnlskb = tipc_buf_acquire(pktlen + INT_H_SIZE, GFP_ATOMIC); if (!tnlskb) { pr_warn("%sunable to send packet\n", link_co_err); return; diff --git a/net/tipc/msg.c b/net/tipc/msg.c index a22be502f1bd..ab02d0742476 100644 --- a/net/tipc/msg.c +++ b/net/tipc/msg.c @@ -58,12 +58,12 @@ static unsigned int align(unsigned int i) * NOTE: Headroom is reserved to allow prepending of a data link header. * There may also be unrequested tailroom present at the buffer's end. */ -struct sk_buff *tipc_buf_acquire(u32 size) +struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp) { struct sk_buff *skb; unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u; - skb = alloc_skb_fclone(buf_size, GFP_ATOMIC); + skb = alloc_skb_fclone(buf_size, gfp); if (skb) { skb_reserve(skb, BUF_HEADROOM); skb_put(skb, size); @@ -95,7 +95,7 @@ struct sk_buff *tipc_msg_create(uint user, uint type, struct tipc_msg *msg; struct sk_buff *buf; - buf = tipc_buf_acquire(hdr_sz + data_sz); + buf = tipc_buf_acquire(hdr_sz + data_sz, GFP_ATOMIC); if (unlikely(!buf)) return NULL; @@ -261,7 +261,7 @@ int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m, /* No fragmentation needed? */ if (likely(msz <= pktmax)) { - skb = tipc_buf_acquire(msz); + skb = tipc_buf_acquire(msz, GFP_KERNEL); if (unlikely(!skb)) return -ENOMEM; skb_orphan(skb); @@ -282,7 +282,7 @@ int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m, msg_set_importance(&pkthdr, msg_importance(mhdr)); /* Prepare first fragment */ - skb = tipc_buf_acquire(pktmax); + skb = tipc_buf_acquire(pktmax, GFP_KERNEL); if (!skb) return -ENOMEM; skb_orphan(skb); @@ -313,7 +313,7 @@ int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m, pktsz = drem + INT_H_SIZE; else pktsz = pktmax; - skb = tipc_buf_acquire(pktsz); + skb = tipc_buf_acquire(pktsz, GFP_KERNEL); if (!skb) { rc = -ENOMEM; goto error; @@ -448,7 +448,7 @@ bool tipc_msg_make_bundle(struct sk_buff **skb, struct tipc_msg *msg, if (msz > (max / 2)) return false; - _skb = tipc_buf_acquire(max); + _skb = tipc_buf_acquire(max, GFP_ATOMIC); if (!_skb) return false; @@ -496,7 +496,7 @@ bool tipc_msg_reverse(u32 own_node, struct sk_buff **skb, int err) /* Never return SHORT header; expand by replacing buffer if necessary */ if (msg_short(hdr)) { - *skb = tipc_buf_acquire(BASIC_H_SIZE + dlen); + *skb = tipc_buf_acquire(BASIC_H_SIZE + dlen, GFP_ATOMIC); if (!*skb) goto exit; memcpy((*skb)->data + BASIC_H_SIZE, msg_data(hdr), dlen); diff --git a/net/tipc/msg.h b/net/tipc/msg.h index 8d408612ffa4..2c3dc38abf9c 100644 --- a/net/tipc/msg.h +++ b/net/tipc/msg.h @@ -820,7 +820,7 @@ static inline bool msg_is_reset(struct tipc_msg *hdr) return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG); } -struct sk_buff *tipc_buf_acquire(u32 size); +struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp); bool tipc_msg_validate(struct sk_buff *skb); bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err); void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type, diff --git a/net/tipc/name_distr.c b/net/tipc/name_distr.c index c1cfd92de17a..23f8899e0f8c 100644 --- a/net/tipc/name_distr.c +++ b/net/tipc/name_distr.c @@ -69,7 +69,7 @@ static struct sk_buff *named_prepare_buf(struct net *net, u32 type, u32 size, u32 dest) { struct tipc_net *tn = net_generic(net, tipc_net_id); - struct sk_buff *buf = tipc_buf_acquire(INT_H_SIZE + size); + struct sk_buff *buf = tipc_buf_acquire(INT_H_SIZE + size, GFP_ATOMIC); struct tipc_msg *msg; if (buf != NULL) {