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linux/drivers/s390/net
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Alexandra Winter 2fe8a23643 s390/qeth: Fix potential loss of L3-IP@ in case of network issues 
Symptom:
In case of a bad cable connection (e.g. dirty optics) a fast sequence of
network DOWN-UP-DOWN-UP could happen. UP triggers recovery of the qeth
interface. In case of a second DOWN while recovery is still ongoing, it
can happen that the IP@ of a Layer3 qeth interface is lost and will not
be recovered by the second UP.

Problem:
When registration of IP addresses with Layer 3 qeth devices fails, (e.g.
because of bad address format) the respective IP address is deleted from
its hash-table in the driver. If registration fails because of a ENETDOWN
condition, the address should stay in the hashtable, so a subsequent
recovery can restore it.

3caa4af834 ("qeth: keep ip-address after LAN_OFFLINE failure")
fixes this for registration failures during normal operation, but not
during recovery.

Solution:
Keep L3-IP address in case of ENETDOWN in qeth_l3_recover_ip(). For
consistency with qeth_l3_add_ip() we also keep it in case of EADDRINUSE,
i.e. for some reason the card already/still has this address registered.

Fixes: 4a71df5004 ("qeth: new qeth device driver")
Cc: stable@vger.kernel.org
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Link: https://lore.kernel.org/r/20240206085849.2902775-1-wintera@linux.ibm.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2024-02-08 12:10:09 +01:00
..
ctcm_dbug.c s390/ctcm: Convert sprintf/snprintf to scnprintf 2023-06-23 11:55:55 +02:00
ctcm_dbug.h s390/ctcm: add __printf format attribute to ctcm_dbf_longtext 2021-11-19 11:12:30 +00:00
ctcm_fsms.c s390/ctcm: cleanup indenting 2023-02-10 19:49:53 -08:00
ctcm_fsms.h
ctcm_main.c s390/ctcm: replace deprecated strncpy with strscpy 2023-10-24 17:46:16 -07:00
ctcm_main.h s390/ctcm: Convert sprintf/snprintf to scnprintf 2023-06-23 11:55:55 +02:00
ctcm_mpc.c s390 updates for 6.5 merge window part 2 2023-07-06 13:18:30 -07:00
ctcm_mpc.h
ctcm_sysfs.c s390/ctcm: Convert sprintf/snprintf to scnprintf 2023-06-23 11:55:55 +02:00
fsm.c s390: move from strlcpy with unused retval to strscpy 2022-08-30 22:00:33 +02:00
fsm.h
ism_drv.c net/smc: manage system EID in SMC stack instead of ISM driver 2023-12-26 20:24:33 +00:00
ism.h net/smc: manage system EID in SMC stack instead of ISM driver 2023-12-26 20:24:33 +00:00
Kconfig s390/ism: ism driver implies smc protocol 2023-11-17 00:31:00 +00:00
lcs.c s390/lcs: Remove FDDI option 2023-07-25 20:06:56 -07:00
lcs.h s390/lcs: Convert sprintf to scnprintf 2023-06-23 11:55:54 +02:00
Makefile
netiucv.c s390: include linux/io.h instead of asm/io.h 2023-07-03 11:19:40 +02:00
qeth_core_main.c s390/qeth: Fix typo 'weed' in comment 2023-11-07 22:17:20 +00:00
qeth_core_mpc.c s390/qeth: remove OSN support 2021-07-20 06:17:06 -07:00
qeth_core_mpc.h s390/qeth: clean up QETH_PROT_* naming 2021-07-20 06:17:06 -07:00
qeth_core_sys.c s390/qeth: Convert sysfs sprintf to sysfs_emit 2023-02-10 19:49:53 -08:00
qeth_core.h s390/qeth: Don't call dev_close/dev_open (DOWN/UP) 2023-08-02 10:12:51 +01:00
qeth_ethtool.c s390/qeth: Convert sprintf/snprintf to scnprintf 2023-02-10 19:49:53 -08:00
qeth_l2_main.c s390/qeth: Don't call dev_close/dev_open (DOWN/UP) 2023-08-02 10:12:51 +01:00
qeth_l2_sys.c s390/qeth: Convert sysfs sprintf to sysfs_emit 2023-02-10 19:49:53 -08:00
qeth_l2.h
qeth_l3_main.c s390/qeth: Fix potential loss of L3-IP@ in case of network issues 2024-02-08 12:10:09 +01:00
qeth_l3_sys.c s390/qeth: Fix vipa deletion 2023-07-05 10:47:45 +01:00
qeth_l3.h
smsgiucv_app.c
smsgiucv.c
smsgiucv.h