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| author | Christoph Hellwig <hch@lst.de> | 2006-01-13 19:04:00 +0100 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.(none)> | 2006-01-14 17:55:05 +0100 |
| commit | e02f3f59225d8c3b2a0ad0dc941a09865e27da61 (patch) | |
| tree | 37d2931f5d24dc063d9606ec6b5e8db359b439c7 /include | |
| parent | [SCSI] fusion - adding support for FC949ES (diff) | |
| download | linux-e02f3f59225d8c3b2a0ad0dc941a09865e27da61.tar.xz linux-e02f3f59225d8c3b2a0ad0dc941a09865e27da61.zip | |
[SCSI] remove target parent limitiation
When James Smart fixed the issue of the userspace scan atributes
crashing the system with the FC transport class he added a patch to
let the transport class check if the parent is valid for a given
transport class.
When adding support for the integrated raid of fusion sas devices
we ran into a problem with that, as it didn't allow adding virtual
raid volumes without the transport class knowing about it.
So this patch adds a user_scan attribute instead, that takes over from
scsi_scan_host_selected if the transport class sets it and thus lets
the transport class control the user-initiated scanning. As this
plugs the hole about user-initiated scanning the target_parent hook
goes away and we rely on callers of the scanning routines to do
something sensible.
For SAS this meant I had to switch from a spinlock to a mutex to
synchronize the topology linked lists, in FC they were completely
unsynchronized which seems wrong.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/scsi/scsi.h | 6 | ||||
| -rw-r--r-- | include/scsi/scsi_transport.h | 7 |
2 files changed, 8 insertions, 5 deletions
diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h index 6cb1e2788d8b..c60b8ff2f5e4 100644 --- a/include/scsi/scsi.h +++ b/include/scsi/scsi.h @@ -32,6 +32,12 @@ extern const unsigned char scsi_command_size[8]; extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE]; /* + * Special value for scanning to specify scanning or rescanning of all + * possible channels, (target) ids, or luns on a given shost. + */ +#define SCAN_WILD_CARD ~0 + +/* * SCSI opcodes */ diff --git a/include/scsi/scsi_transport.h b/include/scsi/scsi_transport.h index f6e0bb484c63..e7b1054adf86 100644 --- a/include/scsi/scsi_transport.h +++ b/include/scsi/scsi_transport.h @@ -30,12 +30,9 @@ struct scsi_transport_template { struct transport_container device_attrs; /* - * If set, call target_parent prior to allocating a scsi_target, - * so we get the appropriate parent for the target. This function - * is required for transports like FC and iSCSI that do not put the - * scsi_target under scsi_host. + * If set, called from sysfs and legacy procfs rescanning code. */ - struct device *(*target_parent)(struct Scsi_Host *, int, uint); + int (*user_scan)(struct Scsi_Host *, uint, uint, uint); /* The size of the specific transport attribute structure (a * space of this size will be left at the end of the |