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authorDavid S. Miller <davem@davemloft.net>2008-07-18 02:39:39 -0700
committerDavid S. Miller <davem@davemloft.net>2008-07-18 02:39:39 -0700
commit49997d75152b3d23c53b0fa730599f2f74c92c65 (patch)
tree46e93126170d02cfec9505172e545732c1b69656 /include/scsi/scsi_dh.h
parenta0c80b80e0fb48129e4e9d6a9ede914f9ff1850d (diff)
parent5b664cb235e97afbf34db9c4d77f08ebd725335e (diff)
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Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts: Documentation/powerpc/booting-without-of.txt drivers/atm/Makefile drivers/net/fs_enet/fs_enet-main.c drivers/pci/pci-acpi.c net/8021q/vlan.c net/iucv/iucv.c
Diffstat (limited to 'include/scsi/scsi_dh.h')
-rw-r--r--include/scsi/scsi_dh.h69
1 files changed, 69 insertions, 0 deletions
diff --git a/include/scsi/scsi_dh.h b/include/scsi/scsi_dh.h
new file mode 100644
index 000000000000..3ad2303d1a16
--- /dev/null
+++ b/include/scsi/scsi_dh.h
@@ -0,0 +1,69 @@
+/*
+ * Header file for SCSI device handler infrastruture.
+ *
+ * Modified version of patches posted by Mike Christie <michaelc@cs.wisc.edu>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright IBM Corporation, 2007
+ * Authors:
+ * Chandra Seetharaman <sekharan@us.ibm.com>
+ * Mike Anderson <andmike@linux.vnet.ibm.com>
+ */
+
+#include <scsi/scsi_device.h>
+
+enum {
+ SCSI_DH_OK = 0,
+ /*
+ * device errors
+ */
+ SCSI_DH_DEV_FAILED, /* generic device error */
+ SCSI_DH_DEV_TEMP_BUSY,
+ SCSI_DH_DEVICE_MAX, /* max device blkerr definition */
+
+ /*
+ * transport errors
+ */
+ SCSI_DH_NOTCONN = SCSI_DH_DEVICE_MAX + 1,
+ SCSI_DH_CONN_FAILURE,
+ SCSI_DH_TRANSPORT_MAX, /* max transport blkerr definition */
+
+ /*
+ * driver and generic errors
+ */
+ SCSI_DH_IO = SCSI_DH_TRANSPORT_MAX + 1, /* generic error */
+ SCSI_DH_INVALID_IO,
+ SCSI_DH_RETRY, /* retry the req, but not immediately */
+ SCSI_DH_IMM_RETRY, /* immediately retry the req */
+ SCSI_DH_TIMED_OUT,
+ SCSI_DH_RES_TEMP_UNAVAIL,
+ SCSI_DH_DEV_OFFLINED,
+ SCSI_DH_NOSYS,
+ SCSI_DH_DRIVER_MAX,
+};
+#if defined(CONFIG_SCSI_DH) || defined(CONFIG_SCSI_DH_MODULE)
+extern int scsi_dh_activate(struct request_queue *);
+extern int scsi_dh_handler_exist(const char *);
+#else
+static inline int scsi_dh_activate(struct request_queue *req)
+{
+ return 0;
+}
+static inline int scsi_dh_handler_exist(const char *name)
+{
+ return 0;
+}
+#endif