Make it possible to build CTL as a module.
Reviewed by: ken Sponsored by: FreeBSD Foundation
This commit is contained in:
trasz
parent
bd84789163
commit
124d4c1899
@ -99,6 +99,7 @@ MAN= aac.4 \
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${_cpuctl.4} \
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cpufreq.4 \
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crypto.4 \
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ctl.4 \
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cue.4 \
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cxgb.4 \
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cxgbe.4 \
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90
share/man/man4/ctl.4
Normal file
90
share/man/man4/ctl.4
Normal file
@ -0,0 +1,90 @@
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.\" Copyright (c) 2013 Edward Tomasz Napierala
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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 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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.Dd March 8, 2013
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.Dt CTL 4
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.Os
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.Sh NAME
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.Nm ctl
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.Nd CAM Target Layer
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.Sh SYNOPSIS
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To compile this driver into the kernel,
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place the following line in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device ctl"
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.Ed
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.Pp
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Alternatively, to load the driver as a
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module at boot time, place the following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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ctl_load="YES"
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.Ed
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.Sh DESCRIPTION
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The
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.Nm
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subsystem provides SCSI disk and processor emulation.
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It supports features such as:
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.Pp
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.Bl -bullet -compact
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.It
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Disk and processor device emulation
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.It
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Tagged queueing
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.It
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SCSI task attribute support (ordered, head of queue, simple tags)
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.It
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SCSI implicit command ordering support.
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.It
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Full task management support (abort, LUN reset, target reset, etc.)
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.It
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Support for multiple ports
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.It
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Support for multiple simultaneous initiators
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.It
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Support for multiple simultaneous backing stores
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.It
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Persistent reservation support
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.It
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Mode sense/select support
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.It
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Error injection support
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.It
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All I/O handled in-kernel, no userland context switch overhead
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.El
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.Sh SEE ALSO
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.Xr ctladm 8 ,
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.Xr ctlstat 8
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.Sh HISTORY
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The
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.Nm
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subsystem first appeared in
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.Fx 9.1 .
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.Sh AUTHORS
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The
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.Nm
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subsystem was written by
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.An Kenneth Merry Aq ken@FreeBSD.org .
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@ -227,9 +227,6 @@ Revision 1.2 Changes
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To Do List:
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==========
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- Make CTL buildable as a module. Work needs to be done on initialization,
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and on freeing resources and LUNs when it is built as a module.
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- Use devstat(9) for CTL's statistics collection. CTL uses a home-grown
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statistics collection system that is similar to devstat(9). ctlstat
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should be retired in favor of iostat, etc., once aggregation modes are
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@ -52,6 +52,7 @@ __FBSDID("$FreeBSD$");
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#include <sys/bio.h>
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#include <sys/fcntl.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/condvar.h>
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#include <sys/malloc.h>
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@ -338,7 +339,7 @@ TUNABLE_INT("kern.cam.ctl.disable", &ctl_disable);
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static void ctl_isc_event_handler(ctl_ha_channel chanel, ctl_ha_event event,
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int param);
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static void ctl_copy_sense_data(union ctl_ha_msg *src, union ctl_io *dest);
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static void ctl_init(void);
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static int ctl_init(void);
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void ctl_shutdown(void);
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static int ctl_open(struct cdev *dev, int flags, int fmt, struct thread *td);
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static int ctl_close(struct cdev *dev, int flags, int fmt, struct thread *td);
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@ -458,11 +459,16 @@ static struct cdevsw ctl_cdevsw = {
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MALLOC_DEFINE(M_CTL, "ctlmem", "Memory used for CTL");
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/*
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* If we have the CAM SIM, we may or may not have another SIM that will
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* cause CTL to get initialized. If not, we need to initialize it.
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*/
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SYSINIT(ctl_init, SI_SUB_CONFIGURE, SI_ORDER_THIRD, ctl_init, NULL);
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static int ctl_module_event_handler(module_t, int /*modeventtype_t*/, void *);
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static moduledata_t ctl_moduledata = {
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"ctl",
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ctl_module_event_handler,
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NULL
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};
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DECLARE_MODULE(ctl, ctl_moduledata, SI_SUB_CONFIGURE, SI_ORDER_THIRD);
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MODULE_VERSION(ctl, 1);
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static void
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ctl_isc_handler_finish_xfer(struct ctl_softc *ctl_softc,
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@ -942,7 +948,7 @@ ctl_copy_sense_data(union ctl_ha_msg *src, union ctl_io *dest)
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dest->io_hdr.status = src->hdr.status;
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}
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static void
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static int
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ctl_init(void)
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{
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struct ctl_softc *softc;
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@ -953,7 +959,7 @@ ctl_init(void)
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#if 0
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int i;
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#endif
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int retval;
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int error, retval;
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//int isc_retval;
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retval = 0;
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@ -962,7 +968,7 @@ ctl_init(void)
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/* If we're disabled, don't initialize. */
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if (ctl_disable != 0)
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return;
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return (0);
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control_softc = malloc(sizeof(*control_softc), M_DEVBUF,
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M_WAITOK | M_ZERO);
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@ -991,7 +997,7 @@ ctl_init(void)
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destroy_dev(softc->dev);
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free(control_softc, M_DEVBUF);
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control_softc = NULL;
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return;
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return (ENOMEM);
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}
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SYSCTL_ADD_INT(&softc->sysctl_ctx,
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@ -1053,7 +1059,7 @@ ctl_init(void)
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&internal_pool)!= 0){
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printf("ctl: can't allocate %d entry internal pool, "
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"exiting\n", CTL_POOL_ENTRIES_INTERNAL);
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return;
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return (ENOMEM);
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}
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if (ctl_pool_create(softc, CTL_POOL_EMERGENCY,
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@ -1061,7 +1067,7 @@ ctl_init(void)
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printf("ctl: can't allocate %d entry emergency pool, "
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"exiting\n", CTL_POOL_ENTRIES_EMERGENCY);
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ctl_pool_free(softc, internal_pool);
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return;
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return (ENOMEM);
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}
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if (ctl_pool_create(softc, CTL_POOL_4OTHERSC, CTL_POOL_ENTRIES_OTHER_SC,
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@ -1071,7 +1077,7 @@ ctl_init(void)
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"exiting\n", CTL_POOL_ENTRIES_OTHER_SC);
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ctl_pool_free(softc, internal_pool);
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ctl_pool_free(softc, emergency_pool);
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return;
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return (ENOMEM);
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}
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softc->internal_pool = internal_pool;
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@ -1092,14 +1098,15 @@ ctl_init(void)
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mtx_unlock(&softc->ctl_lock);
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#endif
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if (kproc_create(ctl_work_thread, softc, &softc->work_thread, 0, 0,
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"ctl_thrd") != 0) {
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error = kproc_create(ctl_work_thread, softc, &softc->work_thread, 0, 0,
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"ctl_thrd");
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if (error != 0) {
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printf("error creating CTL work thread!\n");
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ctl_free_lun(lun);
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ctl_pool_free(softc, internal_pool);
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ctl_pool_free(softc, emergency_pool);
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ctl_pool_free(softc, other_pool);
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return;
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return (error);
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}
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printf("ctl: CAM Target Layer loaded\n");
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@ -1139,10 +1146,11 @@ ctl_init(void)
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if (sizeof(struct callout) > CTL_TIMER_BYTES) {
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printf("sizeof(struct callout) %zd > CTL_TIMER_BYTES %zd\n",
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sizeof(struct callout), CTL_TIMER_BYTES);
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return;
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return (EINVAL);
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}
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#endif /* CTL_IO_DELAY */
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return (0);
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}
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void
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@ -1199,6 +1207,20 @@ ctl_shutdown(void)
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printf("ctl: CAM Target Layer unloaded\n");
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}
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static int
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ctl_module_event_handler(module_t mod, int what, void *arg)
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{
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switch (what) {
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case MOD_LOAD:
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return (ctl_init());
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case MOD_UNLOAD:
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return (EBUSY);
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default:
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return (EOPNOTSUPP);
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}
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}
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/*
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* XXX KDM should we do some access checks here? Bump a reference count to
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* prevent a CTL module from being unloaded while someone has it open?
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@ -121,12 +121,23 @@ struct cfcs_softc cfcs_softc;
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static int cfcs_max_sense = sizeof(struct scsi_sense_data);
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extern int ctl_disable;
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SYSINIT(cfcs_init, SI_SUB_CONFIGURE, SI_ORDER_FOURTH, cfcs_init, NULL);
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SYSCTL_NODE(_kern_cam, OID_AUTO, ctl2cam, CTLFLAG_RD, 0,
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"CAM Target Layer SIM frontend");
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SYSCTL_INT(_kern_cam_ctl2cam, OID_AUTO, max_sense, CTLFLAG_RW,
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&cfcs_max_sense, 0, "Maximum sense data size");
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static int cfcs_module_event_handler(module_t, int /*modeventtype_t*/, void *);
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static moduledata_t cfcs_moduledata = {
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"ctlcfcs",
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cfcs_module_event_handler,
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NULL
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};
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DECLARE_MODULE(ctlcfcs, cfcs_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH);
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MODULE_VERSION(ctlcfcs, 1);
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MODULE_DEPEND(ctlcfi, ctl, 1, 1, 1);
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MODULE_DEPEND(ctlcfi, cam, 1, 1, 1);
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int
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cfcs_init(void)
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@ -176,7 +187,7 @@ cfcs_init(void)
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printf("%s: ctl_frontend_register() failed with error %d!\n",
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__func__, retval);
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mtx_destroy(&softc->lock);
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return (1);
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return (retval);
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}
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/*
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@ -236,7 +247,7 @@ cfcs_init(void)
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CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
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printf("%s: error creating path\n", __func__);
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xpt_bus_deregister(cam_sim_path(softc->sim));
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retval = 1;
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retval = EINVAL;
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goto bailout;
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}
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@ -274,6 +285,20 @@ cfcs_shutdown(void)
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}
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static int
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cfcs_module_event_handler(module_t mod, int what, void *arg)
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{
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switch (what) {
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case MOD_LOAD:
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return (cfcs_init());
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case MOD_UNLOAD:
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return (EBUSY);
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default:
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return (EOPNOTSUPP);
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}
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}
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static void
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cfcs_onoffline(void *arg, int online)
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{
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@ -55,6 +55,7 @@ __FBSDID("$FreeBSD$");
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#include <sys/kernel.h>
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#include <sys/types.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/condvar.h>
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@ -189,7 +190,7 @@ MALLOC_DEFINE(M_CTL_CFI, "ctlcfi", "CTL CFI");
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static struct cfi_softc fetd_internal_softc;
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extern int ctl_disable;
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void cfi_init(void);
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int cfi_init(void);
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void cfi_shutdown(void) __unused;
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static void cfi_online(void *arg);
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static void cfi_offline(void *arg);
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@ -217,9 +218,19 @@ static void cfi_metatask_io_done(union ctl_io *io);
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static void cfi_err_recovery_done(union ctl_io *io);
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static void cfi_lun_io_done(union ctl_io *io);
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SYSINIT(cfi_init, SI_SUB_CONFIGURE, SI_ORDER_FOURTH, cfi_init, NULL);
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static int cfi_module_event_handler(module_t, int /*modeventtype_t*/, void *);
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void
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static moduledata_t cfi_moduledata = {
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"ctlcfi",
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cfi_module_event_handler,
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NULL
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};
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DECLARE_MODULE(ctlcfi, cfi_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH);
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MODULE_VERSION(ctlcfi, 1);
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MODULE_DEPEND(ctlcfi, ctl, 1, 1, 1);
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int
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cfi_init(void)
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{
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struct cfi_softc *softc;
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@ -234,7 +245,7 @@ cfi_init(void)
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/* If we're disabled, don't initialize */
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if (ctl_disable != 0)
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return;
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return (0);
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if (sizeof(struct cfi_lun_io) > CTL_PORT_PRIV_SIZE) {
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printf("%s: size of struct cfi_lun_io %zd > "
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@ -292,7 +303,7 @@ cfi_init(void)
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}
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bailout:
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return;
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return (0);
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bailout_error:
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@ -309,6 +320,8 @@ cfi_init(void)
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default:
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break;
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}
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return (ENOMEM);
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}
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void
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@ -331,6 +344,20 @@ cfi_shutdown(void)
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printf("%s: error shrinking LUN pool\n", __func__);
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}
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static int
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cfi_module_event_handler(module_t mod, int what, void *arg)
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{
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switch (what) {
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case MOD_LOAD:
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return (cfi_init());
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case MOD_UNLOAD:
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return (EBUSY);
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default:
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return (EOPNOTSUPP);
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}
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}
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static void
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cfi_online(void *arg)
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{
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@ -225,11 +225,28 @@ static struct periph_driver ctlfe_driver =
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ctlfeinit, "ctl",
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TAILQ_HEAD_INITIALIZER(ctlfe_driver.units), /*generation*/ 0
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};
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PERIPHDRIVER_DECLARE(ctl, ctlfe_driver);
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static int ctlfe_module_event_handler(module_t, int /*modeventtype_t*/, void *);
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/*
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* We're not using PERIPHDRIVER_DECLARE(), because it runs at SI_SUB_DRIVERS,
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* and that happens before CTL gets initialised.
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*/
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static moduledata_t ctlfe_moduledata = {
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"ctlfe",
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ctlfe_module_event_handler,
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NULL
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};
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DECLARE_MODULE(ctlfe, ctlfe_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH);
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MODULE_VERSION(ctlfe, 1);
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MODULE_DEPEND(ctlfe, ctl, 1, 1, 1);
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MODULE_DEPEND(ctlfe, cam, 1, 1, 1);
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extern struct ctl_softc *control_softc;
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extern int ctl_disable;
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#ifdef seems_unused
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int
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ctlfeinitialize(void)
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{
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@ -257,6 +274,7 @@ ctlfeinitialize(void)
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return (0);
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}
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#endif
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void
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ctlfeshutdown(void)
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@ -288,6 +306,21 @@ ctlfeinit(void)
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}
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}
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static int
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ctlfe_module_event_handler(module_t mod, int what, void *arg)
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{
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switch (what) {
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case MOD_LOAD:
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periphdriver_register(&ctlfe_driver);
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return (0);
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case MOD_UNLOAD:
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return (EBUSY);
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default:
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return (EOPNOTSUPP);
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}
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}
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static void
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ctlfeasync(void *callback_arg, uint32_t code, struct cam_path *path, void *arg)
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{
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@ -1971,7 +2004,6 @@ ctlfe_lun_enable(void *arg, struct ctl_id targ_id, int lun_id)
|
||||
struct cam_sim *sim;
|
||||
cam_status status;
|
||||
|
||||
|
||||
bus_softc = (struct ctlfe_softc *)arg;
|
||||
sim = bus_softc->sim;
|
||||
|
||||
|
||||
@ -78,6 +78,7 @@ SUBDIR= \
|
||||
${_cs} \
|
||||
${_ct} \
|
||||
${_ctau} \
|
||||
ctl \
|
||||
${_cxgb} \
|
||||
cxgbe \
|
||||
${_cyclic} \
|
||||
|
||||
26
sys/modules/ctl/Makefile
Normal file
26
sys/modules/ctl/Makefile
Normal file
@ -0,0 +1,26 @@
|
||||
# $FreeBSD$
|
||||
|
||||
# $FreeBSD$
|
||||
|
||||
.PATH: ${.CURDIR}/../../cam/ctl
|
||||
|
||||
KMOD= ctl
|
||||
|
||||
SRCS= ctl.c
|
||||
SRCS+= ctl_backend.c
|
||||
SRCS+= ctl_backend_block.c
|
||||
SRCS+= ctl_backend_ramdisk.c
|
||||
SRCS+= ctl_cmd_table.c
|
||||
SRCS+= ctl_frontend.c
|
||||
SRCS+= ctl_frontend_cam_sim.c
|
||||
SRCS+= ctl_frontend_internal.c
|
||||
SRCS+= ctl_mem_pool.c
|
||||
SRCS+= ctl_scsi_all.c
|
||||
SRCS+= ctl_error.c
|
||||
SRCS+= ctl_util.c
|
||||
SRCS+= scsi_ctl.c
|
||||
SRCS+= bus_if.h
|
||||
SRCS+= device_if.h
|
||||
SRCS+= vnode_if.h
|
||||
|
||||
.include <bsd.kmod.mk>
|
||||
@ -34,7 +34,7 @@
|
||||
.\" $Id: //depot/users/kenm/FreeBSD-test2/usr.bin/ctlstat/ctlstat.8#2 $
|
||||
.\" $FreeBSD$
|
||||
.\"
|
||||
.Dd June 4, 2010
|
||||
.Dd March 6, 2013
|
||||
.Dt CTLSTAT 8
|
||||
.Os
|
||||
.Sh NAME
|
||||
@ -113,6 +113,7 @@ every 10 seconds.
|
||||
.Sh SEE ALSO
|
||||
.Xr cam 3 ,
|
||||
.Xr cam 4 ,
|
||||
.Xr ctl 4 ,
|
||||
.Xr xpt 4 ,
|
||||
.Xr camcontrol 8 ,
|
||||
.Xr ctladm 8 ,
|
||||
|
||||
@ -34,7 +34,7 @@
|
||||
.\" $Id: //depot/users/kenm/FreeBSD-test2/usr.sbin/ctladm/ctladm.8#3 $
|
||||
.\" $FreeBSD$
|
||||
.\"
|
||||
.Dd March 6, 2012
|
||||
.Dd March 6, 2013
|
||||
.Dt CTLADM 8
|
||||
.Os
|
||||
.Sh NAME
|
||||
@ -975,6 +975,7 @@ This will result in a sense key of NOT READY (0x02), and an ASC/ASCQ of
|
||||
.Xr cam 3 ,
|
||||
.Xr cam_cdbparse 3 ,
|
||||
.Xr cam 4 ,
|
||||
.Xr ctl 4 ,
|
||||
.Xr xpt 4 ,
|
||||
.Xr camcontrol 8
|
||||
.Sh HISTORY
|
||||
|
||||
Loading…
Reference in New Issue
Block a user