2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2004, 2007 Lukas Ertl
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8 * modification, are permitted provided that the following conditions
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31 #ifndef _GEOM_VINUM_RAID5_H_
32 #define _GEOM_VINUM_RAID5_H_
35 * A single RAID5 request usually needs more than one I/O transaction,
36 * depending on the state of the associated subdisks and the direction of the
37 * transaction (read or write).
40 struct gv_raid5_packet {
41 caddr_t data; /* Data buffer of this sub-request- */
42 off_t length; /* Size of data buffer. */
43 off_t lockbase; /* Deny access to our plex offset. */
45 struct bio *bio; /* Pointer to the original bio. */
46 struct bio *parity; /* The bio containing the parity data. */
47 struct bio *waiting; /* A bio that need to wait for other bios. */
49 TAILQ_HEAD(,gv_bioq) bits; /* List of subrequests. */
50 TAILQ_ENTRY(gv_raid5_packet) list; /* Entry in plex's packet list. */
53 struct gv_raid5_packet * gv_raid5_start(struct gv_plex *, struct bio *,
54 caddr_t, off_t, off_t);
55 int gv_stripe_active(struct gv_plex *, struct bio *);
57 #endif /* !_GEOM_VINUM_RAID5_H_ */