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Really implement PREVENT ALLOW MEDIUM REMOVAL command.

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This commit is contained in:
Alexander Motin 2015-09-29 15:12:40 +00:00
parent 7f3d6f1fe3
commit 66b6967686
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=288369
5 changed files with 66 additions and 21 deletions
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73
sys/cam/ctl/ctl.c
View file

@ -5129,30 +5129,43 @@ ctl_start_stop(struct ctl_scsiio *ctsio)
lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr;
cdb = (struct scsi_start_stop_unit *)ctsio->cdb;
if ((lun->flags & CTL_LUN_PR_RESERVED)
&& ((cdb->how & SSS_START)==0)) {
uint32_t residx;
if ((cdb->how & SSS_PC_MASK) == 0) {
if ((lun->flags & CTL_LUN_PR_RESERVED) &&
(cdb->how & SSS_START) == 0) {
uint32_t residx;
residx = ctl_get_initindex(&ctsio->io_hdr.nexus);
if (ctl_get_prkey(lun, residx) == 0
|| (lun->pr_res_idx!=residx && lun->res_type < 4)) {
residx = ctl_get_initindex(&ctsio->io_hdr.nexus);
if (ctl_get_prkey(lun, residx) == 0 ||
(lun->pr_res_idx != residx && lun->res_type < 4)) {
ctl_set_reservation_conflict(ctsio);
ctl_set_reservation_conflict(ctsio);
ctl_done((union ctl_io *)ctsio);
return (CTL_RETVAL_COMPLETE);
}
}
if ((cdb->how & SSS_LOEJ) &&
(lun->flags & CTL_LUN_REMOVABLE) == 0) {
ctl_set_invalid_field(ctsio,
/*sks_valid*/ 1,
/*command*/ 1,
/*field*/ 4,
/*bit_valid*/ 1,
/*bit*/ 1);
ctl_done((union ctl_io *)ctsio);
return (CTL_RETVAL_COMPLETE);
}
}
if ((cdb->how & SSS_LOEJ) &&
(lun->flags & CTL_LUN_REMOVABLE) == 0) {
ctl_set_invalid_field(ctsio,
/*sks_valid*/ 1,
/*command*/ 1,
/*field*/ 4,
/*bit_valid*/ 1,
/*bit*/ 1);
ctl_done((union ctl_io *)ctsio);
return (CTL_RETVAL_COMPLETE);
if ((cdb->how & SSS_START) == 0 && (cdb->how & SSS_LOEJ) &&
lun->prevent_count > 0) {
/* "Medium removal prevented" */
ctl_set_sense(ctsio, /*current_error*/ 1,
/*sense_key*/(lun->flags & CTL_LUN_NO_MEDIA) ?
SSD_KEY_NOT_READY : SSD_KEY_ILLEGAL_REQUEST,
/*asc*/ 0x53, /*ascq*/ 0x02, SSD_ELEM_NONE);
ctl_done((union ctl_io *)ctsio);
return (CTL_RETVAL_COMPLETE);
}
}
retval = lun->backend->config_write((union ctl_io *)ctsio);
@ -5163,11 +5176,14 @@ int
ctl_prevent_allow(struct ctl_scsiio *ctsio)
{
struct ctl_lun *lun;
struct scsi_prevent *cdb;
int retval;
uint32_t initidx;
CTL_DEBUG_PRINT(("ctl_prevent_allow\n"));
lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr;
cdb = (struct scsi_prevent *)ctsio->cdb;
if ((lun->flags & CTL_LUN_REMOVABLE) == 0) {
ctl_set_invalid_opcode(ctsio);
@ -5175,6 +5191,18 @@ ctl_prevent_allow(struct ctl_scsiio *ctsio)
return (CTL_RETVAL_COMPLETE);
}
initidx = ctl_get_initindex(&ctsio->io_hdr.nexus);
mtx_lock(&lun->lun_lock);
if ((cdb->how & PR_PREVENT) &&
ctl_is_set(lun->prevent, initidx) == 0) {
ctl_set_mask(lun->prevent, initidx);
lun->prevent_count++;
} else if ((cdb->how & PR_PREVENT) == 0 &&
ctl_is_set(lun->prevent, initidx)) {
ctl_clear_mask(lun->prevent, initidx);
lun->prevent_count--;
}
mtx_unlock(&lun->lun_lock);
retval = lun->backend->config_write((union ctl_io *)ctsio);
return (retval);
}
@ -11805,9 +11833,7 @@ ctl_do_lun_reset(struct ctl_lun *lun, union ctl_io *io, ctl_ua_type ua_type)
#if 0
uint32_t initidx;
#endif
#ifdef CTL_WITH_CA
int i;
#endif
mtx_lock(&lun->lun_lock);
/*
@ -11842,6 +11868,9 @@ ctl_do_lun_reset(struct ctl_lun *lun, union ctl_io *io, ctl_ua_type ua_type)
for (i = 0; i < CTL_MAX_INITIATORS; i++)
ctl_clear_mask(lun->have_ca, i);
#endif
lun->prevent_count = 0;
for (i = 0; i < CTL_MAX_INITIATORS; i++)
ctl_clear_mask(lun->prevent, i);
mtx_unlock(&lun->lun_lock);
return (0);
@ -11987,6 +12016,10 @@ ctl_i_t_nexus_reset(union ctl_io *io)
#endif
if ((lun->flags & CTL_LUN_RESERVED) && (lun->res_idx == initidx))
lun->flags &= ~CTL_LUN_RESERVED;
if (ctl_is_set(lun->prevent, initidx)) {
ctl_clear_mask(lun->prevent, initidx);
lun->prevent_count--;
}
ctl_est_ua(lun, initidx, CTL_UA_I_T_NEXUS_LOSS);
mtx_unlock(&lun->lun_lock);
}

5
sys/cam/ctl/ctl_backend_block.c
View file

@ -2754,6 +2754,11 @@ ctl_be_block_config_write(union ctl_io *io)
struct ctl_lun_req req;
cdb = (struct scsi_start_stop_unit *)io->scsiio.cdb;
if ((cdb->how & SSS_PC_MASK) != 0) {
ctl_set_success(&io->scsiio);
ctl_config_write_done(io);
break;
}
if (cdb->how & SSS_START) {
if ((cdb->how & SSS_LOEJ) && be_lun->vn == NULL) {
retval = ctl_be_block_open(be_lun, &req);

5
sys/cam/ctl/ctl_backend_ramdisk.c
View file

@ -880,6 +880,11 @@ ctl_backend_ramdisk_config_write(union ctl_io *io)
struct scsi_start_stop_unit *cdb;
cdb = (struct scsi_start_stop_unit *)io->scsiio.cdb;
if ((cdb->how & SSS_PC_MASK) != 0) {
ctl_set_success(&io->scsiio);
ctl_config_write_done(io);
break;
}
if (cdb->how & SSS_START) {
if (cdb->how & SSS_LOEJ)
ctl_lun_has_media(cbe_lun);

2
sys/cam/ctl/ctl_cmd_table.c
View file

@ -658,7 +658,7 @@ const struct ctl_cmd_entry ctl_cmd_table[256] =
CTL_CMD_FLAG_OK_ON_NO_MEDIA |
CTL_FLAG_DATA_NONE |
CTL_CMD_FLAG_ALLOW_ON_PR_RESV,
CTL_LUN_PAT_NONE, 6, {0x01, 0, 0, 0x03, 0x07}},
CTL_LUN_PAT_NONE, 6, {0x01, 0, 0x0f, 0xf7, 0x07}},
/* 1C RECEIVE DIAGNOSTIC RESULTS */
{NULL, CTL_SERIDX_INVLD, CTL_CMD_FLAG_NONE, CTL_LUN_PAT_NONE},

2
sys/cam/ctl/ctl_private.h
View file

@ -397,6 +397,8 @@ struct ctl_lun {
int pr_key_count;
uint32_t pr_res_idx;
uint8_t res_type;
int prevent_count;
uint32_t prevent[(CTL_MAX_INITIATORS+31)/32];
uint8_t *write_buffer;
struct ctl_devid *lun_devid;
TAILQ_HEAD(tpc_lists, tpc_list) tpc_lists;