This patch adds support for kernel module namespaces. This patch is essential
when using SCST in combination with kernel version v5.4 or later.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8673 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Remove this debug assert because it a write residual can happen, e.g. if the
expected transfer length exceeds the Data Out buffer length. This statement
was hit by the following CDB, submitted by the libiscsi regression tests:
[14896]: scst: scst_parse_cmd:1235:Warning: expected transfer length 0 (DIF 0) for opcode WRITE(10) (handler vdisk_fileio, target iscsi) doesn't match decoded value 512
[14896]: scst_parse_cmd:1243:Suspicious CDB:
(h)___0__1__2__3__4__5__6__7__8__9__A__B__C__D__E__F
0: 2a 00 00 00 00 00 00 00 01 00 *.........
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8659 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Surrounding IS_ERR(...) with unlikely() is redundant. Remove the redundant
unlikely() annotations.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8623 d57e44dd-8a1f-0410-8b47-8ef2f437770f
In kernel v5.3 the ib_destroy_cq() return type has been changed from 'int'
into 'void'.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8475 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Move the build_mode file from the top level into the scst directory. Write
build mode defines into scst/include/build_mode.h and include that file
directly or indirectly in all source files that depend on these #defines.
This approach has the advantage that "make clean" does no longer has to
be run when switching between build modes because the kernel build system
recognizes build_mode.h as a dependency and triggers a rebuild of all
source files that directly or indirectly include the build_mode.h header
file.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8347 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This patch avoids that the build_mode file is read when applying the
generate-kernel-patch output to the kernel tree and when building the
kernel tree.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8272 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Move the $(SCST_INC_DIR) definitions from the out-of-tree sections into
the in-kernel sections. Since SCST is now distributed as a single tar
archive, only support in-tree builds with $(SCST_INC_DIR) and $(SCST_DIR).
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8079 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This patch is necessary to make SCST work with Linux kernel v5.1 and
does not change any functionality. See also upstream commit 736706bee329
("get rid of legacy 'get_ds()' function").
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8057 d57e44dd-8a1f-0410-8b47-8ef2f437770f
conn->sock is set by the TCP/IP transport but not by the iSER transport.
Hence check the conn->sock pointer from common code before dereferencing it.
Reported-by: Doug Dumitru <doug@easyco.com>
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8051 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Since all RHEL/CentOS 5 users have upgraded to a newer version, procfs
support is no longer necessary. Hence remove procfs support. This patch
has been generated as follows:
git grep -lw CONFIG_SCST_PROC iscsi-scst qla2x00t scst scst_local srpt |\
while read f; do
echo ${f}
unifdef -U CONFIG_SCST_PROC ${f} >${f}.out
mv ${f}.out ${f}
done
followed by two small manual edits in scst/include/scst.h and also in
qla2x00t/qla2x00-target/qla2x00t.c.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7999 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Zero-copy TCP/IP support is deprecated since a while and is no longer
supported for recent kernels. Hence remove it and also all references
to zero-copy TCP/IP support.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7809 d57e44dd-8a1f-0410-8b47-8ef2f437770f
From the snprintf() man page:
If n is zero, nothing shall be written and s may be a null pointer.
This patch does not change any functionality.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7435 d57e44dd-8a1f-0410-8b47-8ef2f437770f
The system is running an iSCSI write test with header and data digests
enabled. On the command that resulted in the assert, all of the write
data was sent as immediate and unsolicited. The unsolicited data
consisted of a single DataOut PDU and it was the iscsi_cmnd resource
allocated for receiving the unsolicited DataOut that caused the assert,
not the iscsi_cmnd resource tracking the iSCSI write command. As the
Recv thread is finishing up with the iscsi_cmnd struct for receiving the
final unsolicited DataOut, SCST is call the iscsi_pre_exec function to
restart the command and this routine will process the DataOut
iscsi_cmnd as it is queued onto the rx_digest_list of the iscsi_cmnd for
Write.
ffff8a984150c600 is the iscsi_cmnd allocated to track the iSCSI Write command
ffff8a984150d680 is the iscsi_cmnd allocated for receiving the Data-out PDU
In the logs below, recv thread 3677 just completed receiving the unsolicited DataOut.
[ 977.563046] [3677]: do_recv:808:nr_segs 0, bytes_left 0, res 196608
[ 977.563048] [31728]: iscsi_make_conn_rd_active:351:conn ffff8a97d0df1600, rd_state 2, rd_data_ready 1
[ 977.563065] [3677]: do_recv:808:nr_segs 0, bytes_left 0, res 4
[ 977.563069] [31728]: iscsi_make_conn_rd_active:351:conn ffff8a97d0df1600, rd_state 2, rd_data_ready 1
[ 977.563076] [3677]: cmnd_rx_end:3475:cmnd ffff8a984150d680, opcode 5
[ 977.563078] [31728]: iscsi_make_conn_rd_active:351:conn ffff8a97d0df1600, rd_state 2, rd_data_ready 1
[ 977.563081] [3677]: cmnd_rx_end:3478:Updated last_rcv_time 4295644274
[ 977.563091] [3677]: data_out_end:2455:cmnd ffff8a984150d680, req ffff8a984150c600
[ 977.563093] [3677]: cmd_add_on_rx_ddigest_list:820:Adding RX ddigest cmd ffff8a984150d680 to digest list of req ffff8a984150c600
[ 977.563096] [3677]: cmnd_get:764:cmnd ffff8a984150d680, new cmnd->ref_cnt 2
Here we see no more data is pending to be received on this write, so
iscsi_restart_cmnd is called by recv thread which should trigger SCST to
start processing the command:
[ 977.563106] [3677]: data_out_end:2495:req ffff8a984150c600, FINAL 80, outstanding_r2t 0, r2t_len_to_receive 0, r2t_len_to_send 0
[ 977.563108] [3677]: req_del_from_write_timeout_list:141:Deleting cmd ffff8a984150c600 from conn ffff8a97d0df1600 write_timeout_list
[ 977.563111] [3677]: cmnd_remove_data_wait_hash:1606:Deleting cmnd ffff8a984150c600 from the hash (ITT 1e230400)
SCST thread 24654 calls the pre execute routine which verifies the data
digest on immediate and unsolicited data:
[ 977.563157] [24654]: iscsi_pre_exec:1917:Checking digest of RX ddigest cmd ffff8a984150c600
[ 977.563161] [24654]: digest_data:125:req ffff8a984150c600, idx 0, count 16, sg_cnt 64, size 65536, offset 0
[ 977.563170] [24654]: digest_rx_data:219:RX data digest OK for cmd ffff8a984150c600
[ 977.563173] [3677]: cmnd_put:775:cmnd ffff8a984150c600, new ref_cnt 2
[ 977.563176] [24654]: cmd_del_from_rx_ddigest_list:830:Deleting RX digest cmd ffff8a984150c600 from digest list
Recv thread calls pre release on iscsi_cmnd allocated for unsolicited
DataOut PDU:
[ 977.563178] [3677]: req_cmnd_pre_release:820:req ffff8a984150d680
[ 977.563181] [24654]: cmnd_put:775:cmnd ffff8a984150c600, new ref_cnt 1
SCST thread 24654 processing data digest on unsolicited DataOut PDU.
Here we have two threads accessing the same iscsi_cmnd struct. SCST
thread will set on_rx_digest_list flag to 0. Recv thread will set
release_called flag to 1.
[ 977.563184] [24654]: iscsi_pre_exec:1917:Checking digest of RX ddigest cmd ffff8a984150d680
[ 977.563186] [24654]: cmd_del_from_rx_ddigest_list:830:Deleting RX digest cmd ffff8a984150d680 from digest list
[ 977.563189] [24654]: cmnd_put:775:cmnd ffff8a984150d680, new ref_cnt 0
[ 977.563191] [3677]: conn_get:868:conn ffff8a97d0df1600, new conn_ref_cnt 4
[ 977.563194] [24654]: cmnd_done:589:cmnd ffff8a984150d680
[ 977.563196] BUG at ./iscsi-scst/kernel/iscsi.c:598 (cmnd->on_rx_digest_list)
[ 977.563212] ------------[ cut here ]------------
[ 977.563215] kernel BUG at ./iscsi-scst/kernel/iscsi.c:598!
Reported and analyzed by Adam Hutchinson <ajhutchin@gmail.com>
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7338 d57e44dd-8a1f-0410-8b47-8ef2f437770f
Avoid that building SCST with W=1 against kernel v4.15 triggers warnings about
kernel-doc header issues.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7298 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This makes it easier to add support for new kernel versions, e.g. kernel
version v4.14.
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7260 d57e44dd-8a1f-0410-8b47-8ef2f437770f
