The kvmalloc function was added in RHEL 7.5. So the backport is
needed for RHEL 7.4 and older. _COMPAT_LINUX_MM_H is checked as
well to avoid a conflict with the appropriate backport in MOFED.
Signed-off-by: Sergey Gorenko <sergeygo@mellanox.com>
[ bvanassche: fixed spelling in commit message ]
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8578 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Fix the following Coverity complaint:
CID 344744 (#1 of 1): Resource leak (RESOURCE_LEAK)5. leaked_storage: Variable sioc going out of scope leaks the storage it points to.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8567 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Fix the following Coverity complaint:
CID 347914 (#1 of 1): Unintentional integer overflow (OVERFLOW_BEFORE_WIDEN)overflow_before_widen: Potentially overflowing expression blocks << cmd->dev->block_shift - 9 with type uint32_t (32 bits, unsigned) is evaluated using 32-bit arithmetic, and then used in a context that expects an expression of type sector_t (64 bits, unsigned).
To avoid overflow, cast blocks to type sector_t.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8566 d57e44dd-8a1f-0410-8b47-8ef2f437770f
r8478 was not necessary to fix the reported problem. Additionally, it
introduced a new problem, namely that detach_tgt was not called if the
associated device was deleted after the LUN was deleted and before it
was freed.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8517 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Avoid that deleting a device concurrently with scst_cm_init_inq_finish()
causes command processing to hang.
Reported-by: valera <valer4ik@users.sourceforge.net>
Fixes: 0bb6de9471 ("scst_vdisk: Avoid that LUN refresh triggers a general protection fault" / r7101)
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8515 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This patch makes the implementation of scst_prepare_request_sense() consistent
with the other code that submits internal commands.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8512 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This patch does not change any functionality but improves source code
readability.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8511 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Some scripts that use the SCST sysfs interface depend on filp_close()
having been called before device deletion via the sysfs interface
finishes. Hence make device deletion again synchronous.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8510 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Merge scst_free_device() and scst_finally_free_device() into a single
function. Increase dev->refcnt when registering a device or virtual
device. Kill and decrease dev->refcnt when unregistering a device or
virtual device. These changes ensure that a scst_free_device() is
only called after all users (commands and tgt_devs) have stopped
accessing the SCST device.
Fixes: 3f2d50b589 ("scst: Do not suspend command processing when deleting a device"; r8067)
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8501 d57e44dd-8a1f-0410-8b47-8ef2f437770f
scst_free_tgt_dev() waits until pending I/O commands have finished and hence
can take a while.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8487 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Since scst_free_tgt_dev() is called as soon as the tgt_dev refcount
drops to zero and since scst_del_tgt_dev() decrements that reference
count, remove all scst_free_tgt_dev() calls that follow a
scst_del_tgt_dev() call. Set nr_deleted_tgt_devs in scst_acg_add_lun()
to -1 to avoid that all scst_del_tgt_dev() calls try to free the
associated acg_dev.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8478 d57e44dd-8a1f-0410-8b47-8ef2f437770f
A later patch will introduce a delay between deleting and freeing a tgt_dev.
Move the code that decrements dev->not_pr_supporting_tgt_devs_num from the
function that frees a tgt_dev into the function that deletes a tgt_dev such
that the decrement code does not get delayed.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8476 d57e44dd-8a1f-0410-8b47-8ef2f437770f
A later patch will free tgt_devs after an RCU grace period. Make it
safe to access the target template pointer after an RCU grace period.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8474 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This is a command for tape devices. See also the ANSI T10 SSC document.
Signed-off-by: Rob Turk <robtu@rtist.nl>
[ bvanassche: added patch description ]
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8422 d57e44dd-8a1f-0410-8b47-8ef2f437770f
