this patch adds a read of VPD page 0x80 (unit serial number) after successful login.
The serial is then validated on secutive reconnects to avoid the accidental mismatch
of LUN ids if some kind of remapping appears between loss of connection and a later
reconnect.
An additional url parameter force_usn is added to enforce the usn right from the beginning.
If not set via url or the new iscsi_set_unit_serial_number function the usn is learned
at the first successful login.
Signed-off-by: Peter Lieven <pl@dlhnet.de>
This is the basic support for doing i/o in a separate worker thread.
It is still not threads safe but a start.
Now we need to protect all variables such as outqueue, waitpdu
and friends.
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
When an iSCSI connection enters the reconnection phase, the backoff
time (next_reconnect) increases with reconnection retry_cnt. However,
if the client detects that the target has recovered before reaching
next_reconnect, calling iscsi_reconnect/iscsi_force_reconnect has no
any effect, making fast reconnection impossible.
This patch introduces an interface to reset next_reconnect, so that
the client can reset the backoff time upon detecting target recovery
and achieve faster reconnection.
Resolves: https://github.com/sahlberg/libiscsi/issues/428
Signed-off-by: raywang <honglei.wang@smartx.com>
Users need to check if a task is queued to send (not sent yet)
before invoking functions such as iscsi_task_mgmt_abort_task_async.
Otherwise, because task management requests are automatically
treated as "immediate", a request to abort a task is sent before
the task itself.
if (iscsi_scsi_is_task_in_outqueue(iscsi_, task_)) {
iscsi_scsi_cancel_task(iscsi_, task_);
} else {
iscsi_task_mgmt_abort_task_async(iscsi_, task_, AbortCb, context_);
}
If a connection attempt is hung, then iscsi_reconnect() won't do anything. This
makes sense if we'd just re-try to connect to the same target, but if (for
example) login redirect might point us to a different, healthy, target, it
should be possible to restart the full connection process on request.
Signed-off-by: John Levon <john.levon@nutanix.com>
Declare dynamically allocated strings as 'char *' instead of 'const char *'.
Remove the discard_const() macro. Do not test whether or not a pointer is
NULL before calling free() because it is allowed to pass NULL to free().
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
In our use at Datto, we have come across several issues related to the
automatic reconnect logic (mainly its interaction with POLLHUP). This
allows us to disable the functionality, at the expense of writing our
own reconnect logic.
Related: #241
Using WIN32 depends on the build environment defining the variable.
_WIN32 is a predefined MSVC macro and is always available.
Signed-off-by: Tim Crawford <crawfxrd@gmail.com>
The primary issue is that in MSVC 14.00 (VS2015) Microsoft added
snprintf as a function to the standard library and prevents users from
defining it to something else (typically, this was _snprintf). So, only
define it when using _MSC_VER < 1900.
Other changes are:
- Fix macro definition of dup2
- Add macro for getpid
- Add function definition for win32_dup
- Add missing EXTERNs
Signed-off-by: Tim Crawford <crawfxrd@gmail.com>
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>
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>
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>
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>
- 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>
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>
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>
- 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>
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>
We allowed iscsi to be NULL in iscsi_parse_url. Especially
qemu does this and currently segfaults at start. Change the
usage guidelines for target username/password to be the same
as for chap username/password.
Signed-off-by: Peter Lieven <pl@kamp.de>
Some targets return multiple TargetAddress for individual targets.
Create a linked list of addresses for each target instead of
failing the discovery process when this happens.
