Avoid that building SCST with gcc version 8 or later againstkernel v4.14 or
before triggers a compiler warning about casting a function pointer to an
incompatible type.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7881 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Since not setting the fs register correctly leads to silent data
corruption, if scst_read(), scst_write(), scst_readv() or scst_writev()
is called, complain loudly if 'fs' has not been set correctly.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7873 d57e44dd-8a1f-0410-8b47-8ef2f437770f
The 'fs' register must be set before vfs_read() is called. kernel_read()
does this but scst_read() not. Hence change the scst_read() call in the
dlm code into a kernel_read() call.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7872 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Protect modifications of sess_tgt_dev_list with the new mutex
tgt_dev_list_mutex. Protect read-only accesses of this list via
RCU. Do no longer lock scst_mutex when invoking any of the
following functions:
* scst_queue_report_luns_changed_UA().
* scst_report_luns_changed_sess().
* scst_lookup_tgt_dev() when invoked outside of command context.
* scst_nexus_loss().
* scst_do_nexus_loss_sess().
* scst_abort_all_nexus_loss_sess().
* scst_do_nexus_loss_tgt().
That change makes it safe to remove a LUN from sess_tgt_dev_list
while I/O is in progress. Hence allow LUN management without
suspending I/O. When removing a LUN, the LUN visibility changes
immediately without suspending I/O but the corresponding
scst_tgt_dev structures are only freed after a RCU grace period.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7866 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Remove the comment blocks from scst_block_generic_dev_done()
and scst_tape_generic_dev_done() since that comment does
not apply to these functions. Remove the trace statement from
scst_block_generic_dev_done() since it prints values that
are not modified by this function.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7864 d57e44dd-8a1f-0410-8b47-8ef2f437770f
The scst_block_generic_dev_done() function parses the READ CAPACITY
response. Add support for parsing the READ CAPACITY(16) response.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7863 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Some but not all SCSI LLD drivers set req->errors. Some SCSI
LLD drivers set req->errors to a negative Unix error code and
others assign the result of make_status_bytes() to req->errors.
The SCSI core finishes failed pass-through requests by calling
blk_finish_request(). That function calls req->end_io() without
setting req->errors. Hence check both the error argument and
req->errors before calling sioc->done().
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7861 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Bart Van Assche