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Add "iscsictl -e". Among other things, it makes it possible to perform

Browse Source 
discovery without attaching to the targets ("iscsictl -Ad ... -e off"),
and then attach to selected ones ("iscsictl -Mi ... -e on").

PR:		204129
MFC after:	1 month
Relnotes:	yes
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D6633
This commit is contained in:
Edward Tomasz Napierala 2016-05-31 11:32:07 +00:00
parent 4b2933da88
commit ba165a31b3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=301033
8 changed files with 119 additions and 16 deletions
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28
sys/dev/iscsi/iscsi.c
View File

@ -406,6 +406,11 @@ iscsi_maintenance_thread_reconnect(struct iscsi_session *is)
KASSERT(STAILQ_EMPTY(&is->is_postponed),
("destroying session with postponed PDUs"));
if (is->is_conf.isc_enable == 0 && is->is_conf.isc_discovery == 0) {
ISCSI_SESSION_UNLOCK(is);
return;
}
/*
* Request immediate reconnection from iscsid(8).
*/
@ -549,6 +554,9 @@ iscsi_callout(void *context)
callout_schedule(&is->is_callout, 1 * hz);
if (is->is_conf.isc_enable == 0)
goto out;
is->is_timeout++;
if (is->is_waiting_for_iscsid) {
@ -1311,6 +1319,11 @@ iscsi_ioctl_daemon_wait(struct iscsi_softc *sc,
for (;;) {
TAILQ_FOREACH(is, &sc->sc_sessions, is_next) {
ISCSI_SESSION_LOCK(is);
if (is->is_conf.isc_enable == 0 &&
is->is_conf.isc_discovery == 0) {
ISCSI_SESSION_UNLOCK(is);
continue;
}
if (is->is_waiting_for_iscsid)
break;
ISCSI_SESSION_UNLOCK(is);
@ -1826,17 +1839,22 @@ iscsi_ioctl_session_add(struct iscsi_softc *sc, struct iscsi_session_add *isa)
callout_reset(&is->is_callout, 1 * hz, iscsi_callout, is);
TAILQ_INSERT_TAIL(&sc->sc_sessions, is, is_next);
/*
* Trigger immediate reconnection.
*/
ISCSI_SESSION_LOCK(is);
/*
* Don't notify iscsid(8) if the session is disabled and it's not
* a discovery session,
*/
if (is->is_conf.isc_enable == 0 && is->is_conf.isc_discovery == 0) {
ISCSI_SESSION_UNLOCK(is);
sx_xunlock(&sc->sc_lock);
return (0);
}
is->is_waiting_for_iscsid = true;
strlcpy(is->is_reason, "Waiting for iscsid(8)", sizeof(is->is_reason));
ISCSI_SESSION_UNLOCK(is);
cv_signal(&sc->sc_cv);
sx_xunlock(&sc->sc_lock);
return (0);
}

3
sys/dev/iscsi/iscsi_ioctl.h
View File

@ -67,7 +67,8 @@ struct iscsi_session_conf {
int isc_data_digest;
int isc_iser;
char isc_offload[ISCSI_OFFLOAD_LEN];
int isc_spare[2];
int isc_enable;
int isc_spare[1];
};
/*

8
usr.bin/iscsictl/iscsi.conf.5
View File

@ -125,6 +125,14 @@ must be defined.
Discovery sessions result in the initiator connecting to all the targets
returned by SendTargets iSCSI discovery with the defined
.Sy TargetAddress .
.It Cm Enable
Enable or disable the session.
State can be either
.Qq Ar On ,
or
.Qq Ar Off .
Default is
.Qq Ar On .
.It Cm Offload
Name of selected iSCSI hardware offload driver.
Default is

13
usr.bin/iscsictl/iscsictl.8
View File

@ -40,11 +40,13 @@
.Op Fl u Ar user Fl s Ar secret
.Op Fl w Ar timeout
.Op Fl r
.Op Fl e Cm on | off
.Nm
.Fl A
.Fl d Ar discovery-host
.Op Fl u Ar user Fl s Ar secret
.Op Fl r
.Op Fl e Cm on | off
.Nm
.Fl A
.Fl a Op Fl c Ar path
@ -58,6 +60,7 @@
.Op Fl t Ar target
.Op Fl u Ar user
.Op Fl s Ar secret
.Op Fl e Cm on | off
.Nm
.Fl M
.Fl i Ar session-id
@ -110,6 +113,10 @@ Target host name or address used for SendTargets discovery.
When used, it will add a temporary discovery session.
After discovery is done, sessions will be added for each discovered target,
and the temporary discovery session will be removed.
.It Fl e
Enable or disable the session.
This is ignored for discovery sessions, but gets passed down to normal
sessions they add.
.It Fl i
Session ID, as displayed by
.Nm
@ -189,6 +196,12 @@ utility exits 0 on success, and >0 if an error occurs.
Attach to target iqn.2012-06.com.example:target0, served by 192.168.1.1:
.Dl Nm Fl A Fl t Ar iqn.2012-06.com.example:target0 Fl p Ar 192.168.1.1
.Pp
Perform discovery on 192.168.1.1, and add disabled sessions for each
discovered target; use
.Nm -M -e on
to connect them:
.Dl Nm Fl A Fl d Ar 192.168.1.1 Fl e Ar off
.Pp
Disconnect all iSCSI sessions:
.Dl Nm Fl Ra
.Sh SEE ALSO

61
usr.bin/iscsictl/iscsictl.c
View File

@ -98,7 +98,6 @@ target_delete(struct target *targ)
free(targ);
}
static char *
default_initiator_name(void)
{
@ -152,6 +151,23 @@ valid_hex(const char ch)
}
}
int
parse_enable(const char *enable)
{
if (enable == NULL)
return (ENABLE_UNSPECIFIED);
if (strcasecmp(enable, "on") == 0 ||
strcasecmp(enable, "yes") == 0)
return (ENABLE_ON);
if (strcasecmp(enable, "off") == 0 ||
strcasecmp(enable, "no") == 0)
return (ENABLE_OFF);
return (ENABLE_UNSPECIFIED);
}
bool
valid_iscsi_name(const char *name)
{
@ -325,6 +341,8 @@ conf_from_target(struct iscsi_session_conf *conf,
sizeof(conf->isc_mutual_secret));
if (targ->t_session_type == SESSION_TYPE_DISCOVERY)
conf->isc_discovery = 1;
if (targ->t_enable != ENABLE_OFF)
conf->isc_enable = 1;
if (targ->t_protocol == PROTOCOL_ISER)
conf->isc_iser = 1;
if (targ->t_offload != NULL)
@ -371,7 +389,7 @@ kernel_modify(int iscsi_fd, unsigned int session_id, const struct target *targ)
static void
kernel_modify_some(int iscsi_fd, unsigned int session_id, const char *target,
const char *target_addr, const char *user, const char *secret)
const char *target_addr, const char *user, const char *secret, int enable)
{
struct iscsi_session_state *states = NULL;
struct iscsi_session_state *state;
@ -421,6 +439,10 @@ kernel_modify_some(int iscsi_fd, unsigned int session_id, const char *target,
strlcpy(conf->isc_user, user, sizeof(conf->isc_user));
if (secret != NULL)
strlcpy(conf->isc_secret, secret, sizeof(conf->isc_secret));
if (enable == ENABLE_ON)
conf->isc_enable = 1;
else if (enable == ENABLE_OFF)
conf->isc_enable = 0;
memset(&ism, 0, sizeof(ism));
ism.ism_session_id = session_id;
@ -527,6 +549,9 @@ kernel_list(int iscsi_fd, const struct target *targ __unused,
xo_emit("{L:/%-18s}{V:type/%s}\n",
"Session type:",
conf->isc_discovery ? "Discovery" : "Normal");
xo_emit("{L:/%-18s}{V:enable/%s}\n",
"Enable:",
conf->isc_enable ? "Yes" : "No");
xo_emit("{L:/%-18s}{V:state/%s}\n",
"Session state:",
state->iss_connected ? "Connected" : "Disconnected");
@ -575,6 +600,8 @@ kernel_list(int iscsi_fd, const struct target *targ __unused,
} else {
if (conf->isc_discovery) {
xo_emit("{V:state}\n", "Discovery");
} else if (conf->isc_enable == 0) {
xo_emit("{V:state}\n", "Disabled");
} else if (state->iss_connected) {
xo_emit("{V:state}: ", "Connected");
print_periphs(state->iss_id);
@ -653,13 +680,13 @@ usage(void)
{
fprintf(stderr, "usage: iscsictl -A -p portal -t target "
"[-u user -s secret] [-w timeout]\n");
"[-u user -s secret] [-w timeout] [-e on | off]\n");
fprintf(stderr, " iscsictl -A -d discovery-host "
"[-u user -s secret]\n");
"[-u user -s secret] [-e on | off]\n");
fprintf(stderr, " iscsictl -A -a [-c path]\n");
fprintf(stderr, " iscsictl -A -n nickname [-c path]\n");
fprintf(stderr, " iscsictl -M -i session-id [-p portal] "
"[-t target] [-u user] [-s secret]\n");
"[-t target] [-u user] [-s secret] [-e on | off]\n");
fprintf(stderr, " iscsictl -M -i session-id -n nickname "
"[-c path]\n");
fprintf(stderr, " iscsictl -R [-p portal] [-t target]\n");
@ -687,8 +714,8 @@ main(int argc, char **argv)
rflag = 0, vflag = 0;
const char *conf_path = DEFAULT_CONFIG_PATH;
char *nickname = NULL, *discovery_host = NULL, *portal = NULL,
*target = NULL, *user = NULL, *secret = NULL;
int timeout = -1;
*target = NULL, *user = NULL, *secret = NULL;
int timeout = -1, enable = ENABLE_UNSPECIFIED;
long long session_id = -1;
char *end;
int ch, error, iscsi_fd, retval, saved_errno;
@ -699,7 +726,7 @@ main(int argc, char **argv)
argc = xo_parse_args(argc, argv);
xo_open_container("iscsictl");
while ((ch = getopt(argc, argv, "AMRLac:d:i:n:p:rt:u:s:vw:")) != -1) {
while ((ch = getopt(argc, argv, "AMRLac:d:e:i:n:p:rt:u:s:vw:")) != -1) {
switch (ch) {
case 'A':
Aflag = 1;
@ -722,6 +749,13 @@ main(int argc, char **argv)
case 'd':
discovery_host = optarg;
break;
case 'e':
enable = parse_enable(optarg);
if (enable == ENABLE_UNSPECIFIED) {
xo_errx(1, "invalid argument to -e, "
"must be either \"on\" or \"off\"");
}
break;
case 'i':
session_id = strtol(optarg, &end, 10);
if ((size_t)(end - optarg) != strlen(optarg))
@ -781,6 +815,8 @@ main(int argc, char **argv)
*/
if (Aflag != 0) {
if (aflag != 0) {
if (enable != ENABLE_UNSPECIFIED)
xo_errx(1, "-a and -e and mutually exclusive");
if (portal != NULL)
xo_errx(1, "-a and -p and mutually exclusive");
if (target != NULL)
@ -796,6 +832,8 @@ main(int argc, char **argv)
if (rflag != 0)
xo_errx(1, "-a and -r and mutually exclusive");
} else if (nickname != NULL) {
if (enable != ENABLE_UNSPECIFIED)
xo_errx(1, "-n and -e and mutually exclusive");
if (portal != NULL)
xo_errx(1, "-n and -p and mutually exclusive");
if (target != NULL)
@ -838,6 +876,8 @@ main(int argc, char **argv)
xo_errx(1, "-M requires -i");
if (nickname != NULL) {
if (enable != ENABLE_UNSPECIFIED)
xo_errx(1, "-n and -e and mutually exclusive");
if (portal != NULL)
xo_errx(1, "-n and -p and mutually exclusive");
if (target != NULL)
@ -878,6 +918,8 @@ main(int argc, char **argv)
if (discovery_host != NULL)
xo_errx(1, "-d cannot be used with -R");
if (enable != ENABLE_UNSPECIFIED)
xo_errx(1, "-e cannot be used with -R");
if (session_id != -1)
xo_errx(1, "-i cannot be used with -R");
if (rflag != 0)
@ -946,7 +988,7 @@ main(int argc, char **argv)
failed += kernel_list(iscsi_fd, targ, vflag);
} else if (Mflag != 0) {
kernel_modify_some(iscsi_fd, session_id, target, portal,
user, secret);
user, secret, enable);
} else {
if (Aflag != 0 && target != NULL) {
if (valid_iscsi_name(target) == false)
@ -965,6 +1007,7 @@ main(int argc, char **argv)
targ->t_session_type = SESSION_TYPE_NORMAL;
targ->t_address = portal;
}
targ->t_enable = enable;
if (rflag != 0)
targ->t_protocol = PROTOCOL_ISER;
targ->t_user = user;

6
usr.bin/iscsictl/iscsictl.h
View File

@ -58,6 +58,10 @@
#define PROTOCOL_ISCSI 1
#define PROTOCOL_ISER 2
#define ENABLE_UNSPECIFIED 0
#define ENABLE_ON 1
#define ENABLE_OFF 2
struct target {
TAILQ_ENTRY(target) t_next;
struct conf *t_conf;
@ -71,6 +75,7 @@ struct target {
int t_data_digest;
int t_auth_method;
int t_session_type;
int t_enable;
int t_protocol;
char *t_offload;
char *t_user;
@ -113,5 +118,6 @@ void print_periphs(int session_id);
char *checked_strdup(const char *);
bool valid_iscsi_name(const char *name);
int parse_enable(const char *enable);
#endif /* !ISCSICTL_H */

15
usr.bin/iscsictl/parse.y
View File

@ -56,7 +56,7 @@ extern void yyrestart(FILE *);
%}
%token AUTH_METHOD HEADER_DIGEST DATA_DIGEST TARGET_NAME TARGET_ADDRESS
%token AUTH_METHOD ENABLE HEADER_DIGEST DATA_DIGEST TARGET_NAME TARGET_ADDRESS
%token INITIATOR_NAME INITIATOR_ADDRESS INITIATOR_ALIAS USER SECRET
%token MUTUAL_USER MUTUAL_SECRET SEMICOLON SESSION_TYPE PROTOCOL OFFLOAD
%token IGNORED EQUALS OPENING_BRACKET CLOSING_BRACKET
@ -118,6 +118,8 @@ target_entry:
|
session_type
|
enable
|
offload
|
protocol
@ -253,6 +255,17 @@ session_type: SESSION_TYPE EQUALS STR
}
;
enable: ENABLE EQUALS STR
{
if (target->t_enable != ENABLE_UNSPECIFIED)
xo_errx(1, "duplicated enable at line %d", lineno);
target->t_enable = parse_enable($3);
if (target->t_enable == ENABLE_UNSPECIFIED)
xo_errx(1, "invalid enable at line %d; "
"must be either \"on\" or \"off\"", lineno);
}
;
offload: OFFLOAD EQUALS STR
{
if (target->t_offload != NULL)

1
usr.bin/iscsictl/token.l
View File

@ -62,6 +62,7 @@ tgtChapName { return MUTUAL_USER; }
tgtChapSecret { return MUTUAL_SECRET; }
AuthMethod { return AUTH_METHOD; }
SessionType { return SESSION_TYPE; }
enable { return ENABLE; }
protocol { return PROTOCOL; }
offload { return OFFLOAD; }
port { return IGNORED; }