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| author | Kai Makisara <Kai.Makisara@kolumbus.fi> | 2008-02-24 22:29:12 +0200 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-04-07 12:15:40 -0500 |
| commit | b174be02f3634460ac215d249617dee5ae446ae1 (patch) | |
| tree | 6e62d2ff4b3c1cdfe2b36213992bd986ca9a5654 /Documentation/scsi/st.txt | |
| parent | 40f6b36c6243462fb95d0343237331c423494b03 (diff) | |
| download | lwn-b174be02f3634460ac215d249617dee5ae446ae1.tar.gz lwn-b174be02f3634460ac215d249617dee5ae446ae1.zip | |
[SCSI] st: show options currently set in sysfs
Show the current binary tape driver and mode options is sysfs. A file
(options) is created in each directory in /sys/class/scsi_tape. The files
contain masks showing the options. The mask bit definitions are the same as
used when setting the options using the MTSETDRVBUFFER function in the
MTIOCTOP ioctl (defined in include/linux/mtio.h). For example:
> cat /sys/class/scsi_tape/nst0/options
0x00000d07
[jejb: updated doc with correction from Randy Dunlap]
Signed-off-by: Kai Makisara <kai.makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'Documentation/scsi/st.txt')
| -rw-r--r-- | Documentation/scsi/st.txt | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/Documentation/scsi/st.txt b/Documentation/scsi/st.txt index 38f81188def0..40752602c050 100644 --- a/Documentation/scsi/st.txt +++ b/Documentation/scsi/st.txt @@ -2,7 +2,7 @@ This file contains brief information about the SCSI tape driver. The driver is currently maintained by Kai Mäkisara (email Kai.Makisara@kolumbus.fi) -Last modified: Thu Feb 21 21:54:16 2008 by kai.makisara +Last modified: Sun Feb 24 21:59:07 2008 by kai.makisara BASICS @@ -133,6 +133,11 @@ the defaults set by the user. The value -1 means the default is not set. The file 'dev' contains the device numbers corresponding to this device. The links 'device' and 'driver' point to the SCSI device and driver entries. +Each directory also contains the entry 'options' which shows the currently +enabled driver and mode options. The value in the file is a bit mask where the +bit definitions are the same as those used with MTSETDRVBUFFER in setting the +options. + A link named 'tape' is made from the SCSI device directory to the class directory corresponding to the mode 0 auto-rewind device (e.g., st0). |