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Add a loader tunable, kern.cam.ctl.disable, that will disable
loading CTL. This may be useful in very low memory installations. MFC after: 3 days
This commit is contained in:
parent
d7f7144a73
commit
beedaee94a
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=237726
@ -308,7 +308,6 @@ static struct scsi_control_page control_page_changeable = {
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/*aen_holdoff_period*/{0, 0}
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};
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SYSCTL_NODE(_kern_cam, OID_AUTO, ctl, CTLFLAG_RD, 0, "CAM Target Layer");
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/*
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* XXX KDM move these into the softc.
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@ -318,7 +317,12 @@ static int persis_offset;
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static uint8_t ctl_pause_rtr;
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static int ctl_is_single;
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static int index_to_aps_page;
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int ctl_disable = 0;
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SYSCTL_NODE(_kern_cam, OID_AUTO, ctl, CTLFLAG_RD, 0, "CAM Target Layer");
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SYSCTL_INT(_kern_cam_ctl, OID_AUTO, disable, CTLFLAG_RDTUN, &ctl_disable, 0,
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"Disable CTL");
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TUNABLE_INT("kern.cam.ctl.disable", &ctl_disable);
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/*
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* Serial number (0x80), device id (0x83), and supported pages (0x00)
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@ -949,6 +953,10 @@ ctl_init(void)
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ctl_pause_rtr = 0;
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rcv_sync_msg = 0;
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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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control_softc = malloc(sizeof(*control_softc), M_DEVBUF, M_WAITOK);
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softc = control_softc;
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@ -62,6 +62,7 @@ __FBSDID("$FreeBSD$");
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#include <cam/ctl/ctl_debug.h>
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extern struct ctl_softc *control_softc;
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extern int ctl_disable;
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int
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ctl_backend_register(struct ctl_backend_driver *be)
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@ -71,6 +72,10 @@ ctl_backend_register(struct ctl_backend_driver *be)
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ctl_softc = control_softc;
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/* Don't continue if CTL is disabled */
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if (ctl_disable != 0)
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return (0);
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mtx_lock(&ctl_softc->ctl_lock);
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/*
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* Sanity check, make sure this isn't a duplicate registration.
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@ -119,6 +119,7 @@ struct cfcs_softc cfcs_softc;
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* amount of SCSI sense data that we will report to CAM.
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*/
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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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@ -138,6 +139,10 @@ cfcs_init(void)
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#endif
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int retval;
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/* Don't continue if CTL is disabled */
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if (ctl_disable != 0)
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return (0);
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softc = &cfcs_softc;
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retval = 0;
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bzero(softc, sizeof(*softc));
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@ -187,6 +187,7 @@ struct cfi_softc {
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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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void cfi_shutdown(void) __unused;
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@ -231,6 +232,10 @@ cfi_init(void)
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retval = 0;
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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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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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"CTL_PORT_PRIV_SIZE %d\n", __func__,
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@ -227,12 +227,17 @@ static struct periph_driver ctlfe_driver =
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PERIPHDRIVER_DECLARE(ctl, ctlfe_driver);
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extern struct ctl_softc *control_softc;
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extern int ctl_disable;
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int
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ctlfeinitialize(void)
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{
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cam_status status;
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/* Don't initialize if we're disabled */
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if (ctl_disable != 0)
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return (0);
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STAILQ_INIT(&ctlfe_softc_list);
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mtx_init(&ctlfe_list_mtx, ctlfe_mtx_desc, NULL, MTX_DEF);
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@ -263,6 +268,10 @@ ctlfeinit(void)
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{
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cam_status status;
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/* Don't initialize if we're disabled */
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if (ctl_disable != 0)
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return;
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STAILQ_INIT(&ctlfe_softc_list);
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mtx_init(&ctlfe_list_mtx, ctlfe_mtx_desc, NULL, MTX_DEF);
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