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294bfe0343
'struct sctp_sched_ops' is not modified in these drivers. Constifying this structure moves some data to a read-only section, so increases overall security, especially when the structure holds some function pointers. On a x86_64, with allmodconfig, as an example: Before: ====== text data bss dec hex filename 8019 568 0 8587 218b net/sctp/stream_sched_fc.o After: ===== text data bss dec hex filename 8275 312 0 8587 218b net/sctp/stream_sched_fc.o Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Link: https://patch.msgid.link/dce03527eb7b7cc8a3c26d5cdac12bafe3350135.1761377890.git.christophe.jaillet@wanadoo.fr Signed-off-by: Jakub Kicinski <kuba@kernel.org>
65 lines
2.4 KiB
C
65 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* SCTP kernel implementation
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* (C) Copyright Red Hat Inc. 2017
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*
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* These are definitions used by the stream schedulers, defined in RFC
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* draft ndata (https://tools.ietf.org/html/draft-ietf-tsvwg-sctp-ndata-11)
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*
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* Please send any bug reports or fixes you make to the
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* email addresses:
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* lksctp developers <linux-sctp@vger.kernel.org>
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*
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* Written or modified by:
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* Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
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*/
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#ifndef __sctp_stream_sched_h__
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#define __sctp_stream_sched_h__
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struct sctp_sched_ops {
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/* Property handling for a given stream */
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int (*set)(struct sctp_stream *stream, __u16 sid, __u16 value,
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gfp_t gfp);
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int (*get)(struct sctp_stream *stream, __u16 sid, __u16 *value);
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/* Init the specific scheduler */
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int (*init)(struct sctp_stream *stream);
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/* Init a stream */
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int (*init_sid)(struct sctp_stream *stream, __u16 sid, gfp_t gfp);
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/* free a stream */
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void (*free_sid)(struct sctp_stream *stream, __u16 sid);
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/* Enqueue a chunk */
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void (*enqueue)(struct sctp_outq *q, struct sctp_datamsg *msg);
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/* Dequeue a chunk */
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struct sctp_chunk *(*dequeue)(struct sctp_outq *q);
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/* Called only if the chunk fit the packet */
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void (*dequeue_done)(struct sctp_outq *q, struct sctp_chunk *chunk);
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/* Schedule all chunks already enqueued */
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void (*sched_all)(struct sctp_stream *stream);
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/* Unschedule all chunks already enqueued */
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void (*unsched_all)(struct sctp_stream *stream);
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};
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int sctp_sched_set_sched(struct sctp_association *asoc,
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enum sctp_sched_type sched);
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int sctp_sched_get_sched(struct sctp_association *asoc);
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int sctp_sched_set_value(struct sctp_association *asoc, __u16 sid,
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__u16 value, gfp_t gfp);
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int sctp_sched_get_value(struct sctp_association *asoc, __u16 sid,
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__u16 *value);
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void sctp_sched_dequeue_done(struct sctp_outq *q, struct sctp_chunk *ch);
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void sctp_sched_dequeue_common(struct sctp_outq *q, struct sctp_chunk *ch);
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int sctp_sched_init_sid(struct sctp_stream *stream, __u16 sid, gfp_t gfp);
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const struct sctp_sched_ops *sctp_sched_ops_from_stream(struct sctp_stream *stream);
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void sctp_sched_ops_register(enum sctp_sched_type sched,
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const struct sctp_sched_ops *sched_ops);
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void sctp_sched_ops_prio_init(void);
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void sctp_sched_ops_rr_init(void);
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void sctp_sched_ops_fc_init(void);
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void sctp_sched_ops_wfq_init(void);
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#endif /* __sctp_stream_sched_h__ */
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