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9c77b803f2
Transport header size could be 60 bytes, and network header
size can also be 60 bytes. Add the Ethernet header and we
are above 128 bytes.
Since drivers using net/core/tso.c usually allocates
one DMA coherent piece of memory per TX queue, this patch
might cause issues if a driver was using too many slots.
For 1024 slots, we would need 256 KB of physically
contiguous memory instead of 128 KB.
Alternative fix would be to add checks in the fast path,
but this involves more work in all drivers using net/core/tso.c.
Fixes: f9cbe9a556 ("net: define the TSO header size in net/tso.h")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
24 lines
515 B
C
24 lines
515 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _TSO_H
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#define _TSO_H
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#include <net/ip.h>
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#define TSO_HEADER_SIZE 256
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struct tso_t {
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int next_frag_idx;
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void *data;
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size_t size;
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u16 ip_id;
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bool ipv6;
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u32 tcp_seq;
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};
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int tso_count_descs(struct sk_buff *skb);
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void tso_build_hdr(struct sk_buff *skb, char *hdr, struct tso_t *tso,
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int size, bool is_last);
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void tso_build_data(struct sk_buff *skb, struct tso_t *tso, int size);
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void tso_start(struct sk_buff *skb, struct tso_t *tso);
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#endif /* _TSO_H */
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