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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2010-08-09 16:12:53 (GMT) |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-08-09 16:12:54 (GMT) |
| commit | 982bdf814616bec77c920e16ea4108d409f144ed (patch) | |
| tree | 7aee4e1dde2001ca5415103778fb95e93c3d2065 /drivers/s390/cio/io_sch.h | |
| parent | 7cd403142d5dbffa354b7dd369b1069e01b1ae19 (diff) | |
| download | linux-982bdf814616bec77c920e16ea4108d409f144ed.tar.xz | |
[S390] ccwreq: add ability to use all paths
Change the ccwrequest infrastructure to use more than one channel
path per start I/O. A flag "singlepath" is added to struct
ccw_request - if set, the old behavior is used. This flag is set
for all exploiters of the ccwrequest infrastructure - so there
is no functional change through this patch.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/io_sch.h')
| -rw-r--r-- | drivers/s390/cio/io_sch.h | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/s390/cio/io_sch.h b/drivers/s390/cio/io_sch.h index b9ce712..469ef93 100644 --- a/drivers/s390/cio/io_sch.h +++ b/drivers/s390/cio/io_sch.h @@ -92,11 +92,12 @@ enum io_status { * @filter: optional callback to adjust request status based on IRB data * @callback: final callback * @data: user-defined pointer passed to all callbacks + * @singlepath: if set, use only one path from @lpm per start I/O + * @cancel: non-zero if request was cancelled + * @done: non-zero if request was finished * @mask: current path mask * @retries: current number of retries * @drc: delayed return code - * @cancel: non-zero if request was cancelled - * @done: non-zero if request was finished */ struct ccw_request { struct ccw1 *cp; @@ -108,12 +109,13 @@ struct ccw_request { enum io_status); void (*callback)(struct ccw_device *, void *, int); void *data; + unsigned int singlepath:1; /* These fields are used internally. */ + unsigned int cancel:1; + unsigned int done:1; u16 mask; u16 retries; int drc; - int cancel:1; - int done:1; } __attribute__((packed)); /* |