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63abb6a3b5
This makes it clear that 'methods' (if not NULL) points to an array that won't be modified. Internally, this array is indeed copied into the given OSD type's larger array of all methods for all slots. Reviewed by: jamie Approved by: markj (mentor) MFC after: 5 days Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D46886 (cherry picked from commit 4a26b63145a5e18610aa9050262e3b4f75aa7117)
115 lines
4.3 KiB
C
115 lines
4.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _SYS_OSD_H_
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#define _SYS_OSD_H_
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#include <sys/queue.h>
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/*
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* Lock key:
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* (c) container lock (e.g. jail's pr_mtx) and/or osd_object_lock
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* (l) osd_list_lock
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*/
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struct osd {
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u_int osd_nslots; /* (c) */
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void **osd_slots; /* (c) */
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LIST_ENTRY(osd) osd_next; /* (l) */
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};
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#ifdef _KERNEL
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#define OSD_THREAD 0
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#define OSD_JAIL 1
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#define OSD_KHELP 2
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#define OSD_FIRST OSD_THREAD
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#define OSD_LAST OSD_KHELP
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typedef void (*osd_destructor_t)(void *value);
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typedef int (*osd_method_t)(void *obj, void *data);
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int osd_register(u_int type, osd_destructor_t destructor,
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const osd_method_t *methods);
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void osd_deregister(u_int type, u_int slot);
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int osd_set(u_int type, struct osd *osd, u_int slot, void *value);
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void **osd_reserve(u_int slot);
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int osd_set_reserved(u_int type, struct osd *osd, u_int slot, void **rsv,
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void *value);
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void osd_free_reserved(void **rsv);
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void *osd_get(u_int type, struct osd *osd, u_int slot);
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void *osd_get_unlocked(u_int type, struct osd *osd, u_int slot);
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void osd_del(u_int type, struct osd *osd, u_int slot);
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int osd_call(u_int type, u_int method, void *obj, void *data);
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void osd_exit(u_int type, struct osd *osd);
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#define osd_thread_register(destructor) \
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osd_register(OSD_THREAD, (destructor), NULL)
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#define osd_thread_deregister(slot) \
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osd_deregister(OSD_THREAD, (slot))
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#define osd_thread_set(td, slot, value) \
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osd_set(OSD_THREAD, &(td)->td_osd, (slot), (value))
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#define osd_thread_set_reserved(td, slot, rsv, value) \
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osd_set_reserved(OSD_THREAD, &(td)->td_osd, (slot), (rsv), (value))
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#define osd_thread_get(td, slot) \
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osd_get(OSD_THREAD, &(td)->td_osd, (slot))
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#define osd_thread_get_unlocked(td, slot) \
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osd_get_unlocked(OSD_THREAD, &(td)->td_osd, (slot))
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#define osd_thread_del(td, slot) do { \
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KASSERT((td) == curthread, ("Not curthread.")); \
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osd_del(OSD_THREAD, &(td)->td_osd, (slot)); \
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} while (0)
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#define osd_thread_call(td, method, data) \
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osd_call(OSD_THREAD, (method), (td), (data))
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#define osd_thread_exit(td) \
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osd_exit(OSD_THREAD, &(td)->td_osd)
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#define osd_jail_register(destructor, methods) \
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osd_register(OSD_JAIL, (destructor), (methods))
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#define osd_jail_deregister(slot) \
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osd_deregister(OSD_JAIL, (slot))
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#define osd_jail_set(pr, slot, value) \
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osd_set(OSD_JAIL, &(pr)->pr_osd, (slot), (value))
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#define osd_jail_set_reserved(pr, slot, rsv, value) \
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osd_set_reserved(OSD_JAIL, &(pr)->pr_osd, (slot), (rsv), (value))
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#define osd_jail_get(pr, slot) \
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osd_get(OSD_JAIL, &(pr)->pr_osd, (slot))
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#define osd_jail_get_unlocked(pr, slot) \
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osd_get_unlocked(OSD_JAIL, &(pr)->pr_osd, (slot))
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#define osd_jail_del(pr, slot) \
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osd_del(OSD_JAIL, &(pr)->pr_osd, (slot))
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#define osd_jail_call(pr, method, data) \
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osd_call(OSD_JAIL, (method), (pr), (data))
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#define osd_jail_exit(pr) \
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osd_exit(OSD_JAIL, &(pr)->pr_osd)
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#endif /* _KERNEL */
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#endif /* !_SYS_OSD_H_ */
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