fd7ea6d48a
and d_stripesisze; Introduce si_stripesize and si_stripeoffset in struct cdev so we can make the visible to clustering code. Add stripesize and stripeoffset to providers. DTRT with stripesize and stripeoffset in various places in GEOM.
435 lines
12 KiB
C
435 lines
12 KiB
C
/*-
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* Copyright (c) 2002 Poul-Henning Kamp
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* Copyright (c) 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by Poul-Henning Kamp
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* and NAI Labs, the Security Research Division of Network Associates, Inc.
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* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
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* DARPA CHATS research program.
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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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* 3. The names of the authors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* $FreeBSD$
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*/
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#ifndef _GEOM_GEOM_H_
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#define _GEOM_GEOM_H_
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/sx.h>
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#include <sys/queue.h>
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#include <sys/ioccom.h>
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#include <sys/sbuf.h>
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#ifdef KERNELSIM
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/*
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* The GEOM subsystem makes a few concessions in order to be able to run as a
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* user-land simulation as well as a kernel component.
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*/
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#include <geom_sim.h>
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#endif
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struct g_class;
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struct g_geom;
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struct g_consumer;
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struct g_provider;
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struct g_event;
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struct g_stat;
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struct thread;
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struct bio;
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struct sbuf;
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struct g_configargs;
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typedef int g_config_t (struct g_configargs *ca);
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typedef struct g_geom * g_taste_t (struct g_class *, struct g_provider *,
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int flags);
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#define G_TF_NORMAL 0
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#define G_TF_INSIST 1
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#define G_TF_TRANSPARENT 2
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typedef int g_access_t (struct g_provider *, int, int, int);
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/* XXX: not sure about the thread arg */
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typedef void g_orphan_t (struct g_consumer *);
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typedef void g_start_t (struct bio *);
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typedef void g_spoiled_t (struct g_consumer *);
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typedef void g_dumpconf_t (struct sbuf *, const char *indent, struct g_geom *,
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struct g_consumer *, struct g_provider *);
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/*
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* The g_class structure describes a transformation class. In other words
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* all BSD disklabel handlers share one g_class, all MBR handlers share
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* one common g_class and so on.
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* Certain operations are instantiated on the class, most notably the
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* taste and config_geom functions.
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*/
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struct g_class {
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const char *name;
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g_taste_t *taste;
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g_config_t *config;
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/*
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* The remaning elements are private and classes should use
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* the G_CLASS_INITIALIZER macro to initialize them.
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*/
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LIST_ENTRY(g_class) class;
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LIST_HEAD(,g_geom) geom;
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struct g_event *event;
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u_int protect;
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};
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#define G_CLASS_INITIALIZER { 0, 0 }, { 0 }, 0, 0
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/*
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* The g_geom is an instance of a g_class.
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*/
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struct g_geom {
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u_int protect;
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char *name;
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struct g_class *class;
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LIST_ENTRY(g_geom) geom;
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LIST_HEAD(,g_consumer) consumer;
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LIST_HEAD(,g_provider) provider;
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TAILQ_ENTRY(g_geom) geoms; /* XXX: better name */
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int rank;
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g_start_t *start;
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g_spoiled_t *spoiled;
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g_dumpconf_t *dumpconf;
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g_access_t *access;
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g_orphan_t *orphan;
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void *softc;
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struct g_event *event;
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unsigned flags;
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#define G_GEOM_WITHER 1
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};
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/*
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* The g_bioq is a queue of struct bio's.
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* XXX: possibly collection point for statistics.
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* XXX: should (possibly) be collapsed with sys/bio.h::bio_queue_head.
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*/
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struct g_bioq {
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TAILQ_HEAD(, bio) bio_queue;
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struct mtx bio_queue_lock;
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int bio_queue_length;
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};
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/*
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* A g_consumer is an attachment point for a g_provider. One g_consumer
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* can only be attached to one g_provider, but multiple g_consumers
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* can be attached to one g_provider.
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*/
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struct g_consumer {
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u_int protect;
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struct g_geom *geom;
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LIST_ENTRY(g_consumer) consumer;
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struct g_provider *provider;
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LIST_ENTRY(g_consumer) consumers; /* XXX: better name */
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int acr, acw, ace;
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struct g_event *event;
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int spoiled;
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struct g_stat *stat;
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};
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/*
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* A g_provider is a "logical disk".
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*/
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struct g_provider {
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u_int protect;
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char *name;
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LIST_ENTRY(g_provider) provider;
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struct g_geom *geom;
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LIST_HEAD(,g_consumer) consumers;
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int acr, acw, ace;
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int error;
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struct g_event *event;
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TAILQ_ENTRY(g_provider) orphan;
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u_int index;
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off_t mediasize;
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u_int sectorsize;
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u_int stripesize;
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u_int stripeoffset;
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struct g_stat *stat;
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u_int flags;
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#define G_PF_CANDELETE 0x1
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};
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/*
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* This gadget is used by userland to pinpoint a particular instance of
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* something in the kernel. The name is unreadable on purpose, people
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* should not encounter it directly but use library functions to deal
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* with it.
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* If len is zero, "id" contains a cast of the kernel pointer where the
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* entity is located, (likely derived from the "id=" attribute in the
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* XML config) and the g_id*() functions will validate this before allowing
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* it to be used.
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* If len is non-zero, it is the strlen() of the name which is pointed to
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* by "name".
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*/
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struct geomidorname {
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u_int len;
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union {
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const char *name;
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uintptr_t id;
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} u;
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};
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/* geom_dev.c */
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int g_dev_print(void);
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/* geom_dump.c */
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void g_hexdump(void *ptr, int length);
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void g_trace(int level, const char *, ...);
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# define G_T_TOPOLOGY 1
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# define G_T_BIO 2
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# define G_T_ACCESS 4
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/* geom_event.c */
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typedef void g_call_me_t(void *);
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int g_call_me(g_call_me_t *func, void *arg);
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void g_orphan_provider(struct g_provider *pp, int error);
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void g_waitidle(void);
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/* geom_subr.c */
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int g_access_abs(struct g_consumer *cp, int nread, int nwrite, int nexcl);
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int g_access_rel(struct g_consumer *cp, int nread, int nwrite, int nexcl);
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void g_add_class(struct g_class *mp);
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int g_attach(struct g_consumer *cp, struct g_provider *pp);
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void g_destroy_consumer(struct g_consumer *cp);
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void g_destroy_geom(struct g_geom *pp);
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void g_destroy_provider(struct g_provider *pp);
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void g_detach(struct g_consumer *cp);
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void g_error_provider(struct g_provider *pp, int error);
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int g_getattr__(const char *attr, struct g_consumer *cp, void *var, int len);
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#define g_getattr(a, c, v) g_getattr__((a), (c), (v), sizeof *(v))
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int g_handleattr(struct bio *bp, const char *attribute, void *val, int len);
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int g_handleattr_int(struct bio *bp, const char *attribute, int val);
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int g_handleattr_off_t(struct bio *bp, const char *attribute, off_t val);
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struct g_geom * g_insert_geom(const char *class, struct g_consumer *cp);
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struct g_consumer * g_new_consumer(struct g_geom *gp);
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struct g_geom * g_new_geomf(struct g_class *mp, const char *fmt, ...);
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struct g_provider * g_new_providerf(struct g_geom *gp, const char *fmt, ...);
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void g_sanity(void *ptr);
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void g_spoil(struct g_provider *pp, struct g_consumer *cp);
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int g_std_access(struct g_provider *pp, int dr, int dw, int de);
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void g_std_done(struct bio *bp);
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void g_std_spoiled(struct g_consumer *cp);
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struct g_class *g_idclass(struct geomidorname *);
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struct g_geom *g_idgeom(struct geomidorname *);
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struct g_provider *g_idprovider(struct geomidorname *);
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/* geom_io.c */
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struct bio * g_clone_bio(struct bio *);
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void g_destroy_bio(struct bio *);
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void g_io_deliver(struct bio *bp, int error);
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int g_io_getattr(const char *attr, struct g_consumer *cp, int *len, void *ptr);
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void g_io_request(struct bio *bp, struct g_consumer *cp);
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int g_io_setattr(const char *attr, struct g_consumer *cp, int len, void *ptr);
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struct bio *g_new_bio(void);
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void * g_read_data(struct g_consumer *cp, off_t offset, off_t length, int *error);
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int g_write_data(struct g_consumer *cp, off_t offset, void *ptr, off_t length);
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/* geom_kern.c / geom_kernsim.c */
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#ifndef _SYS_CONF_H_
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typedef int d_ioctl_t(dev_t dev, u_long cmd, caddr_t data,
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int fflag, struct thread *td);
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#endif
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struct g_ioctl {
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u_long cmd;
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void *data;
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int fflag;
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struct thread *td;
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d_ioctl_t *func;
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void *dev;
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};
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#ifdef _KERNEL
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struct g_kerneldump {
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off_t offset;
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off_t length;
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};
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MALLOC_DECLARE(M_GEOM);
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static __inline void *
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g_malloc(int size, int flags)
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{
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void *p;
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p = malloc(size, M_GEOM, flags);
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g_sanity(p);
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/* printf("malloc(%d, %x) -> %p\n", size, flags, p); */
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return (p);
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}
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static __inline void
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g_free(void *ptr)
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{
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g_sanity(ptr);
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/* printf("free(%p)\n", ptr); */
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free(ptr, M_GEOM);
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}
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extern struct sx topology_lock;
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#define g_topology_lock() \
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do { \
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mtx_assert(&Giant, MA_NOTOWNED); \
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sx_xlock(&topology_lock); \
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} while (0)
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#define g_topology_unlock() \
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do { \
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g_sanity(NULL); \
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sx_xunlock(&topology_lock); \
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} while (0)
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#define g_topology_assert() \
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do { \
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g_sanity(NULL); \
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sx_assert(&topology_lock, SX_XLOCKED); \
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} while (0)
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#define DECLARE_GEOM_CLASS_INIT(class, name, init) \
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SYSINIT(name, SI_SUB_DRIVERS, SI_ORDER_FIRST, init, NULL);
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#define DECLARE_GEOM_CLASS(class, name) \
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static void \
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name##init(void) \
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{ \
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mtx_unlock(&Giant); \
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g_add_class(&class); \
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mtx_lock(&Giant); \
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} \
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DECLARE_GEOM_CLASS_INIT(class, name, name##init);
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#endif /* _KERNEL */
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/*
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* IOCTLS for talking to the geom.ctl device.
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*/
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/*
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* This is the structure used internally in the kernel, it is created and
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* populated by geom_ctl.c.
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*/
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struct g_configargs {
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/* Valid on call */
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struct g_class *class;
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struct g_geom *geom;
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struct g_provider *provider;
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u_int flag;
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u_int len;
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void *ptr;
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};
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/*
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* This is the structure used to communicate with userland.
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*/
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struct geomconfiggeom {
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/* Valid on call */
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struct geomidorname class;
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struct geomidorname geom;
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struct geomidorname provider;
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u_int flag;
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u_int len;
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void *ptr;
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};
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#define GEOMCONFIGGEOM _IOW('G', 0, struct geomconfiggeom)
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#define GCFG_GENERIC0 0x00000000
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/*
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* Generic requests suitable for all classes.
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*/
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#define GCFG_CLASS0 0x10000000
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/*
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* Class specific verbs. Allocations in this part of the numberspace
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* can only be done after review and approval of phk@FreeBSD.org.
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* All allocations in this space will be listed in this file.
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*/
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#define GCFG_PRIVATE0 0x20000000
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/*
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* Lowest allocation for private flag definitions.
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* If you define you own private "verbs", please express them in
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* your code as (GCFG_PRIVATE0 + somenumber), where somenumber is
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* a magic number in the range [0x0 ... 0xfffffff] chosen the way
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* magic numbers are chosen. Such allocation SHALL NOT be listed
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* here but SHOULD be listed in some suitable .h file.
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*/
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#define GCFG_RESERVED0 0x30000000
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#define GCFG_RESERVEDN 0xffffffff
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/*
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* This area is reserved for the future.
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*/
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#define GCFG_CREATE (GCFG_GENERIC0 + 0x0)
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/*
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* Request geom construction.
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* ptr/len is class-specific.
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*/
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#define GCFG_DISMANTLE (GCFG_GENERIC0 + 0x1)
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/*
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* Request orderly geom dismantling.
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* ptr/len is class-specific.
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*/
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struct gcfg_magicrw {
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off_t offset;
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u_int len;
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};
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#define GCFG_MAGICREAD (GCFG_GENERIC0 + 0x100)
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/*
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* Read of magic spaces.
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* ptr/len is gcfgmagicrw structure followed by bufferspace
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* for data to be read.
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*/
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#define GCFG_MAGICWRITE (GCFG_GENERIC0 + 0x101)
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/*
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* Write of magic spaces.
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* as above, only the other way.
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*/
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/* geom_enc.c */
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uint16_t g_dec_be2(const u_char *p);
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uint32_t g_dec_be4(const u_char *p);
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uint16_t g_dec_le2(const u_char *p);
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uint32_t g_dec_le4(const u_char *p);
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uint64_t g_dec_le8(const u_char *p);
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void g_enc_le2(u_char *p, uint16_t u);
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void g_enc_le4(u_char *p, uint32_t u);
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void g_enc_le8(u_char *p, uint64_t u);
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#endif /* _GEOM_GEOM_H_ */
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