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authorRobert Love <robert.w.love@intel.com>2012-05-23 06:06:10 +0400
committerJames Bottomley <JBottomley@Parallels.com>2012-05-23 12:36:27 +0400
commit619fe4bed415e5d8a4749937f42b6a8a9031d4aa (patch)
tree8b52f6fd4b2ba58ef898f628aba8ab49111e1aa8 /include/scsi/libfcoe.h
parentb7e94a1686c5daef4f649f7f4f839cc294f07710 (diff)
downloadlinux-619fe4bed415e5d8a4749937f42b6a8a9031d4aa.tar.xz
[SCSI] fcoe: Allocate fcoe_ctlr with fcoe_interface, not as a member
Currently the fcoe_ctlr associated with an interface is allocated as a member of struct fcoe_interface. This causes problems when attempting to use the new fcoe_sysfs APIs which allow us to allocate the fcoe_interface as private data to the fcoe_ctlr_device instance. The problem is that libfcoe wants to be able use pointer math to find a fcoe_ctlr's fcoe_ctlr_device as well as finding a fcoe_ctlr_device's assocated fcoe_ctlr. To do this we need to allocate the fcoe_ctlr_device, with private data for the LLD. The private data contains the fcoe_ctlr and its private data is the fcoe_interface. This patch only allocates the fcoe_interface with the fcoe_ctlr, the fcoe_ctlr_device will be added in a later patch, which will complete the below diagram- +------------------+ | fcoe_ctlr_device | +------------------+ | fcoe_ctlr | +------------------+ | fcoe_interface | +------------------+ This prep work will allow us to go from a fcoe_ctlr_device instance to its fcoe_ctlr as well as from a fcoe_ctlr to its fcoe_ctlr_device once the fcoe_sysfs API is in use (later patches in this series). Signed-off-by: Robert Love <robert.w.love@intel.com> Tested-by: Ross Brattain <ross.b.brattain@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'include/scsi/libfcoe.h')
-rw-r--r--include/scsi/libfcoe.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/scsi/libfcoe.h b/include/scsi/libfcoe.h
index cfdb55f0937e..69eca4b7ce2b 100644
--- a/include/scsi/libfcoe.h
+++ b/include/scsi/libfcoe.h
@@ -159,6 +159,15 @@ struct fcoe_ctlr {
};
/**
+ * fcoe_ctlr_priv() - Return the private data from a fcoe_ctlr
+ * @cltr: The fcoe_ctlr whose private data will be returned
+ */
+static inline void *fcoe_ctlr_priv(const struct fcoe_ctlr *ctlr)
+{
+ return (void *)(ctlr + 1);
+}
+
+/**
* struct fcoe_fcf - Fibre-Channel Forwarder
* @list: list linkage
* @time: system time (jiffies) when an advertisement was last received