Build on existing scsi_cdb_extended_copy() functionality. This operation
can be used to offload inter and intra LU copies to the target.
The API is rather primitive, in that the caller needs to construct the
parameter buffer, including CSCD and segment descriptor lists, etc.
Signed-off-by: David Disseldorp <ddiss@suse.de>
Build on existing scsi_cdb_receive_copy_results() functionality. This
request is most commonly used to determine target-side EXTENDED COPY
operational parameters.
Signed-off-by: David Disseldorp <ddiss@suse.de>
iscsi_read_from_socket can currently only read one PDU in each iscsi_service invocation even
if there is more data available on the socket. This patch reads all PDUs until the socket
would block. It enqueues all complete read PDUs and then processes them in order of arrival.
Signed-off-by: Peter Lieven <pl@kamp.de>
This splits a transport into static driver specific functions for the common
iscsi commands. Optionally, a driver specific opaque memory is introduced
which is currently only used by iSER transport.
Last a lot of functions changed to static.
Signed-off-by: Peter Lieven <pl@kamp.de>
This commit includes all iSER implementation in libscsi
library and utilities.
Also, adding iser option in url.
Change-Id: I55ca8a9d4db802e72eb991061260dbb0bd0ef9ba
Signed-off-by: Roy Shterman <roysh@mellanox.com>
future iSER implementation will include different implementations
for all socket relative function. in iSER we get event only when
there is new entry in completion queue opposed to TCP that we get event
when we can write to the socket.
1. iscsi_get_fd -
TCP - returns socket fd.
ISER - returns completion queue channel fd.
2. iscsi_service -
TCP - processing the event type got from the socket
and handles it.
ISER - rearming the event mechanism in the completion queue
and polling all available completion queue entries for
process.
3. iscsi_which_events -
TCP - returns which type of event the library is waiting for
(Read, Write or both).
ISER - in iSER we are waiting only for POLLIN event, hence this
function always returns POLLIN.
Signed-off-by: Roy Shterman <roysh@mellanox.com>
iscsi-command: Adding new functions for all write operations (WRITE10,
WRITE12, WRITE16, WRITEOR, etc') for cases where the user wants
to pass his own io vectors (prevent memcpy).
new functions are called iscsi_write*_iov_task and looks
very similar to the iscsi_write*_task, only they get
scsi_iovec pointer and number of scsi_iovec as
parameters.
Change-Id: I719552b4cbda4f937975b5df7e77b4844e48cd16
Signed-off-by: Roy Shterman <roysh@mellanox.com>
iscsi-command: Adding new functions for all write operations (READ6,
READ10, READ12, READ16, etc') for cases where the
user wants to pass his own io vectors (prevent memcpy).
new functions are called iscsi_read*_iov_task and looks
very similar to the iscsi_read*_task, only they get
scsi_iovec pointer and number of scsi_iovec as
parameters.
Change-Id: Ice6bdb9227d72b20f495927f17d6757c124e4c84
Signed-off-by: Roy Shterman <roysh@mellanox.com>
all library: change disconnect to iscsi->t->disconnect
1. In TCP we need only to put -1 in fd and we don't
have more transport resources. In future iSER we will need to
clean resources and destroy the rdma connection.
Signed-off-by: Roy Shterman <roysh@mellanox.com>
socket: need to malloc hdr
include/iscsi-private: changing iscsi_in_pdu hdr to char*
instead of static array for more convinient iser
pdu creation.
To use iscsi_in_pdu in iSER without making a copy of it
we need to change hdr to pointer from static array,
Because of that, iscsi_tcp flow need to do szmalloc (small zero malloc)
hdr when creating new iscsi_in_pdu. iscsi_in_pdu is being malloced
once per each received pdu. This change is reducing iscsi_in_pdu struct
size but adding extra allocation of the same size we reduced
from the struct.
Signed-off-by: Roy Shterman <roysh@mellanox.com>
include/iscsi-private: adding queue_pdu in transport function pointers
struct
include/iscsi: declaration of tcp_queue_pdu function
socket: adding queue_pdu function to transport initialization
all_library: changing iscsi_queue_pdu into iscsi->t->queue_pdu
Signed-off-by: Roy Shterman <roysh@mellanox.com>
socket: adding tcp_connect function and implement it
in the last common part of iSER and TCP in iscsi_connect_async
Signed-off-by: Roy Shterman <roysh@mellanox.com>
lib/init: initializing connection transport
lib/socket: Adding function to initialize tcp transport.
future commits will include adding iSER transport layer,
so each transport option will has it's own template of functions.
all_utils: All utils stay the same, in future iSER commits in case of
iSER transport we will override tcp_transport in
iscsi_context.
connect: adding transport initialization when creating context
include/iscsi-private: Adding iscsi_transport attribute in iscsi_context
Signed-off-by: Roy Shterman <roysh@mellanox.com>
Make iscsi_init_tcp_transport private
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
we use the flag ISCSI_PDU_NO_CALLBACK and pdu->callback simultaneously, but
check only for one of them in various places. So drop ISCSI_PDU_NO_CALLBACK
and check for pdu->callback != NULL instead.
All PDUs that carried this flag have pdu->callback set to NULL.
Signed-off-by: Peter Lieven <pl@kamp.de>
- Various test updates.
- Add tests for ExtendedCopy and ReceiveCopyResults
- Add support for WRITE_ATOMIC_16 and tests
- Multipath tests added
- Persistent Reservation test updates.
- Make sure to process target NOPs in the tests
- Fix broken CHAP has handling.
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
There is technically no reason why a SSD with (assumingly with thin
provisioning) can not support SANITIZE/OVERWRITE instead or or in addition
to the more expected SANITIZE/BLOCK-ERASE so remove the warning for this.
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
This function allows the caller to determine the number of PDUs queued
for transmission for a given iscsi context.
Signed-off-by: David Disseldorp <ddiss@suse.de>
These values are defined in rfc3720
10.6. Task Management Function Response
-> 10.6.1. Response
The response field is a single byte value, and is already used within
libiscsi as a command_data parameter for iscsi_task_mgmt_async()
callbacks.
Signed-off-by: David Disseldorp <ddiss@suse.de>
This seriously breaks qemu NOP timeouts and probably other things.
The reason is that the
define ISCSI_PDU_ERROR_ON_RECONNECT 0x00000016
is masking bits 0x2 and 0x4 as well.
Correctly it should read:
define ISCSI_PDU_ERROR_ON_RECONNECT 0x00000010
However, the better solution for this approach is invoke all callbacks
of PDUs which carry the ISCSI_PDU_DROP_ON_RECONNECT flag. This will
make sure that callbacks of whatever sync tasks are invoked.
This reverts commit 0407cf6aed.
Certain iSCSI commands such as NOP and LOGOUT commands are discarded instead
of re-queued when we have a session failure and reconnect.
Change the LOGOUT command to instead fail with SCSI_STATUS_ERROR when this
happens.
Otherwise, IF we are in iscsi_logout_sync() and we get a session failure
at the same-ish time we may end up automatically re-connecting the
session, but since we have discarded the logout command we will never
get a reply and will hang indefinitely in the event loop for synchronous
commands.
Arguably, we could also just return SCSI_STATUS_GOOD here since
when we perform a logout, we probably don't care too much about how we
disconnected from the server, only that we did disconnect from the server.
That is academic anyway since this only affects the sync API which is only
meant for trivial applications, which will likely not inspect the result
and just do a:
...
iscsi_logout_sync()
iscsi_destroy_context()
...
anyway.
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
We unified ISCSI and SCSI status codes a long long time ago
and got rid of the actual ISCSI_STATUS_* codes.
Update iscsi.h and remove references to these obsolete symbols
and replace with SCSI_STATUS_*
Normal applications want the current behaviour where we have the library
consume any/all of the UnitAttentions that the target may have queued on the
initial connection, but when we reconnect the session after a failure the
library will pass all the UAs back to the application to process.
Some applications, such as the test suite or really trivial applications
might not want to have to deal with handling of UAs and just "make it work".
Those applications can now request that upon any reconnection of the session
that libiscsi will automatically consume any and all UAs and hide them from
the application.
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Check that the Persistent Reserve In REPORT CAPABILITIES response
carries valid LENGTH, ALLOW COMMANDS, and PERSISTENT RESERVATION TYPE
MASK fields.
Signed-off-by: David Disseldorp <ddiss@suse.de>
- Replace some u_int32_t with uint32_t
- Portability fixes to iscsi-perf
- Improved documentation for the tests in README
- Add/fix support for setting task/pdu timeouts and add unit tests for it.
- Add multipath helpers for the test suite and add a simple multipath test
- Skip sending TUR during reconnect, since it can cause the connection to
- hang.
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Add a test to verify the pdu timeout handling.
Fix numerous bugs in the timeout handling. It was really broken.
Add test for non-SCSI task PDUs too and verify they works.
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
- Add support to use /dev/* nodes instead of just iscsi devices.
- Create a dedicated test for the FUA/DPO flags
- Allow reusing the context after disconnect
- Fix non-randomness in rand_key()
- Add iscsi-perf tool
- Fix length bug when sending unsolicited data in iscsi_command
- Reqrite the reconnect logic to begome fully async
- Fix wrong checks for username in CHAP
- Support Bidirectional CHAP
- Improve handling of IMMEDIATE bit
- Cmdsn, statsn fixes+
- iscsi_which_events can return 0, which means that there are no events right
now but try again in a second or so.
- Ignore any ASYNC EVENTS we receive since we can not yet pass them back to
the application.
- Add initial make test support
- Various minor fixes to libiscsi and the test suite
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
this variable was introduced for iscsi-test-cu only. This patch
makes it a generic environment variable that can be set per context.
Signed-off-by: Peter Lieven <pl@kamp.de>
Extend struct scsi_sense with sense specific descriptor information,
introduce the function scsi_parse_sense_data() and let that function
parse the sense specific descriptor.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Disable memory caching in libiscsi if the environment variable
LIBISCSI_CACHE_ALLOCATIONS has been set to zero. This makes
Valgrind reports more meaningful.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
