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| author | Michael Tokarev <mjt@tls.msk.ru> | 2006-10-27 16:02:37 +0400 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2007-04-17 18:15:04 -0400 |
| commit | d7b8bcb0a0819315a51cae620ff7ae0c1704c069 (patch) | |
| tree | 13945e987d1654d58905bbb467b3671388d74746 /include/scsi | |
| parent | 44ec95425c1d9dce6e4638c29e4362cfb44814e7 (diff) | |
| download | linux-d7b8bcb0a0819315a51cae620ff7ae0c1704c069.tar.bz2 | |
[SCSI] modalias for scsi devices
The following patch adds support for sysfs/uevent modalias
attribute for scsi devices (like disks, tapes, cdroms etc),
based on whatever current sd.c, sr.c, st.c and osst.c drivers
supports.
The modalias format is like this:
scsi:type-0x04
(for TYPE_WORM, handled by sr.c now).
Several comments.
o This hexadecimal type value is because all TYPE_XXX constants
in include/scsi/scsi.h are given in hex, but __stringify() will
not convert them to decimal (so it will NOT be scsi:type-4).
Since it does not really matter in which format it is, while
both modalias in module and modalias attribute match each other,
I descided to go for that 0x%02x format (and added a comment in
include/scsi/scsi.h to keep them that way), instead of changing
them all to decimal.
o There was no .uevent routine for SCSI bus. It might be a good
idea to add some more ueven environment variables in there.
o osst.c driver handles tapes too, like st.c, but only SOME tapes.
With this setup, hotplug scripts (or whatever is used by the
user) will try to load both st and osst modules for all SCSI
tapes found, because both modules have scsi:type-0x01 alias).
It is not harmful, but one extra module is no good either.
It is possible to solve this, by exporting more info in
modalias attribute, including vendor and device identification
strings, so that modalias becomes something like
scsi:type-0x12:vendor-Adaptec LTD:device-OnStream Tape Drive
and having that, match for all 3 attributes, not only device
type. But oh well, vendor and device strings may be large,
and they do contain spaces and whatnot.
So I left them for now, awaiting for comments first.
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/scsi.h | 1 | ||||
| -rw-r--r-- | include/scsi/scsi_device.h | 5 |
2 files changed, 6 insertions, 0 deletions
diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h index 5c0e9791441c..9f8f80ab0c8b 100644 --- a/include/scsi/scsi.h +++ b/include/scsi/scsi.h @@ -203,6 +203,7 @@ static inline int scsi_status_is_good(int status) /* * DEVICE TYPES + * Please keep them in 0x%02x format for $MODALIAS to work */ #define TYPE_DISK 0x00 diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index b05cd3b09e6e..2f3c5b8b1d6a 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -358,4 +358,9 @@ static inline int scsi_device_qas(struct scsi_device *sdev) return 0; return sdev->inquiry[56] & 0x02; } + +#define MODULE_ALIAS_SCSI_DEVICE(type) \ + MODULE_ALIAS("scsi:t-" __stringify(type) "*") +#define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x" + #endif /* _SCSI_SCSI_DEVICE_H */ |