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dcssblk: issue warning when trying to save SN/EN type DCSS 

The content of a DCSS of type SN or EN cannot be saved. Issue a warning when
trying to save such a DCSS. Depending on the setup, this may be a user error
or intended behaviour e.g. with a multi-DCSS device.

Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Gerald Schaefer 2015-01-16 18:29:04 +01:00 committed by Martin Schwidefsky
parent 10ad34bc76
commit 5be6fdc090
1 changed files with 13 additions and 2 deletions
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15
drivers/s390/block/dcssblk.c
View File

@ -438,7 +438,13 @@ dcssblk_save_store(struct device *dev, struct device_attribute *attr, const char
pr_info("All DCSSs that map to device %s are "
"saved\n", dev_info->segment_name);
list_for_each_entry(entry, &dev_info->seg_list, lh) {
segment_save(entry->segment_name);
if (entry->segment_type == SEG_TYPE_EN ||
entry->segment_type == SEG_TYPE_SN)
pr_warn("DCSS %s is of type SN or EN"
" and cannot be saved\n",
entry->segment_name);
else
segment_save(entry->segment_name);
}
} else {
// device is busy => we save it when it becomes
@ -797,7 +803,12 @@ dcssblk_release(struct gendisk *disk, fmode_t mode)
pr_info("Device %s has become idle and is being saved "
"now\n", dev_info->segment_name);
list_for_each_entry(entry, &dev_info->seg_list, lh) {
segment_save(entry->segment_name);
if (entry->segment_type == SEG_TYPE_EN ||
entry->segment_type == SEG_TYPE_SN)
pr_warn("DCSS %s is of type SN or EN and cannot"
" be saved\n", entry->segment_name);
else
segment_save(entry->segment_name);
}
dev_info->save_pending = 0;
}