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-rw-r--r--include/xen/grant_table.h2
-rw-r--r--include/xen/interface/grant_table.h161
-rw-r--r--include/xen/interface/io/ring.h19
-rw-r--r--include/xen/interface/io/vscsiif.h133
-rw-r--r--include/xen/interface/io/xs_wire.h37
-rw-r--r--include/xen/xenbus.h4
6 files changed, 279 insertions, 77 deletions
diff --git a/include/xen/grant_table.h b/include/xen/grant_table.h
index dfd5bf31cfb9..7d0f2f0037b8 100644
--- a/include/xen/grant_table.h
+++ b/include/xen/grant_table.h
@@ -57,8 +57,6 @@
#define INVALID_GRANT_REF ((grant_ref_t)-1)
#define INVALID_GRANT_HANDLE ((grant_handle_t)-1)
-#define GNTTAB_RESERVED_XENSTORE 1
-
/* NR_GRANT_FRAMES must be less than or equal to that configured in Xen */
#define NR_GRANT_FRAMES 4
diff --git a/include/xen/interface/grant_table.h b/include/xen/interface/grant_table.h
index 3eeabbc7ee09..cebbd99f1f84 100644
--- a/include/xen/interface/grant_table.h
+++ b/include/xen/interface/grant_table.h
@@ -19,7 +19,8 @@
/* Some rough guidelines on accessing and updating grant-table entries
* in a concurrency-safe manner. For more information, Linux contains a
- * reference implementation for guest OSes (arch/xen/kernel/grant_table.c).
+ * reference implementation for guest OSes (drivers/xen/grant_table.c, see
+ * http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=blob;f=drivers/xen/grant-table.c;hb=HEAD
*
* NB. WMB is a no-op on current-generation x86 processors. However, a
* compiler barrier will still be required.
@@ -80,8 +81,9 @@ typedef uint32_t grant_ref_t;
*/
/*
- * Version 1 of the grant table entry structure is maintained purely
- * for backwards compatibility. New guests should use version 2.
+ * Version 1 of the grant table entry structure is maintained largely for
+ * backwards compatibility. New guests are recommended to support using
+ * version 2 to overcome version 1 limitations, but to default to version 1.
*/
struct grant_entry_v1 {
/* GTF_xxx: various type and flag information. [XEN,GST] */
@@ -89,12 +91,21 @@ struct grant_entry_v1 {
/* The domain being granted foreign privileges. [GST] */
domid_t domid;
/*
- * GTF_permit_access: Frame that @domid is allowed to map and access. [GST]
- * GTF_accept_transfer: Frame whose ownership transferred by @domid. [XEN]
+ * GTF_permit_access: GFN that @domid is allowed to map and access. [GST]
+ * GTF_accept_transfer: GFN that @domid is allowed to transfer into. [GST]
+ * GTF_transfer_completed: MFN whose ownership transferred by @domid
+ * (non-translated guests only). [XEN]
*/
uint32_t frame;
};
+/* The first few grant table entries will be preserved across grant table
+ * version changes and may be pre-populated at domain creation by tools.
+ */
+#define GNTTAB_NR_RESERVED_ENTRIES 8
+#define GNTTAB_RESERVED_CONSOLE 0
+#define GNTTAB_RESERVED_XENSTORE 1
+
/*
* Type of grant entry.
* GTF_invalid: This grant entry grants no privileges.
@@ -111,10 +122,13 @@ struct grant_entry_v1 {
#define GTF_type_mask (3U<<0)
/*
- * Subflags for GTF_permit_access.
+ * Subflags for GTF_permit_access and GTF_transitive.
* GTF_readonly: Restrict @domid to read-only mappings and accesses. [GST]
* GTF_reading: Grant entry is currently mapped for reading by @domid. [XEN]
* GTF_writing: Grant entry is currently mapped for writing by @domid. [XEN]
+ * Further subflags for GTF_permit_access only.
+ * GTF_PAT, GTF_PWT, GTF_PCD: (x86) cache attribute flags to be used for
+ * mappings of the grant [GST]
* GTF_sub_page: Grant access to only a subrange of the page. @domid
* will only be allowed to copy from the grant, and not
* map it. [GST]
@@ -125,6 +139,12 @@ struct grant_entry_v1 {
#define GTF_reading (1U<<_GTF_reading)
#define _GTF_writing (4)
#define GTF_writing (1U<<_GTF_writing)
+#define _GTF_PWT (5)
+#define GTF_PWT (1U<<_GTF_PWT)
+#define _GTF_PCD (6)
+#define GTF_PCD (1U<<_GTF_PCD)
+#define _GTF_PAT (7)
+#define GTF_PAT (1U<<_GTF_PAT)
#define _GTF_sub_page (8)
#define GTF_sub_page (1U<<_GTF_sub_page)
@@ -164,8 +184,7 @@ struct grant_entry_header {
};
/*
- * Version 2 of the grant entry structure, here is a union because three
- * different types are suppotted: full_page, sub_page and transitive.
+ * Version 2 of the grant entry structure.
*/
union grant_entry_v2 {
struct grant_entry_header hdr;
@@ -180,9 +199,9 @@ union grant_entry_v2 {
* field of the same name in the V1 entry structure.
*/
struct {
- struct grant_entry_header hdr;
- uint32_t pad0;
- uint64_t frame;
+ struct grant_entry_header hdr;
+ uint32_t pad0;
+ uint64_t frame;
} full_page;
/*
@@ -191,10 +210,10 @@ union grant_entry_v2 {
* in frame @frame.
*/
struct {
- struct grant_entry_header hdr;
- uint16_t page_off;
- uint16_t length;
- uint64_t frame;
+ struct grant_entry_header hdr;
+ uint16_t page_off;
+ uint16_t length;
+ uint64_t frame;
} sub_page;
/*
@@ -202,12 +221,15 @@ union grant_entry_v2 {
* grant @gref in domain @trans_domid, as if it was the local
* domain. Obviously, the transitive access must be compatible
* with the original grant.
+ *
+ * The current version of Xen does not allow transitive grants
+ * to be mapped.
*/
struct {
- struct grant_entry_header hdr;
- domid_t trans_domid;
- uint16_t pad0;
- grant_ref_t gref;
+ struct grant_entry_header hdr;
+ domid_t trans_domid;
+ uint16_t pad0;
+ grant_ref_t gref;
} transitive;
uint32_t __spacer[4]; /* Pad to a power of two */
@@ -219,6 +241,21 @@ typedef uint16_t grant_status_t;
* GRANT TABLE QUERIES AND USES
*/
+#define GNTTABOP_map_grant_ref 0
+#define GNTTABOP_unmap_grant_ref 1
+#define GNTTABOP_setup_table 2
+#define GNTTABOP_dump_table 3
+#define GNTTABOP_transfer 4
+#define GNTTABOP_copy 5
+#define GNTTABOP_query_size 6
+#define GNTTABOP_unmap_and_replace 7
+#define GNTTABOP_set_version 8
+#define GNTTABOP_get_status_frames 9
+#define GNTTABOP_get_version 10
+#define GNTTABOP_swap_grant_ref 11
+#define GNTTABOP_cache_flush 12
+/* ` } */
+
/*
* Handle to track a mapping created via a grant reference.
*/
@@ -227,7 +264,7 @@ typedef uint32_t grant_handle_t;
/*
* GNTTABOP_map_grant_ref: Map the grant entry (<dom>,<ref>) for access
* by devices and/or host CPUs. If successful, <handle> is a tracking number
- * that must be presented later to destroy the mapping(s). On error, <handle>
+ * that must be presented later to destroy the mapping(s). On error, <status>
* is a negative status code.
* NOTES:
* 1. If GNTMAP_device_map is specified then <dev_bus_addr> is the address
@@ -241,7 +278,6 @@ typedef uint32_t grant_handle_t;
* host mapping is destroyed by other means then it is *NOT* guaranteed
* to be accounted to the correct grant reference!
*/
-#define GNTTABOP_map_grant_ref 0
struct gnttab_map_grant_ref {
/* IN parameters. */
uint64_t host_addr;
@@ -266,7 +302,6 @@ DEFINE_GUEST_HANDLE_STRUCT(gnttab_map_grant_ref);
* 3. After executing a batch of unmaps, it is guaranteed that no stale
* mappings will remain in the device or host TLBs.
*/
-#define GNTTABOP_unmap_grant_ref 1
struct gnttab_unmap_grant_ref {
/* IN parameters. */
uint64_t host_addr;
@@ -286,7 +321,6 @@ DEFINE_GUEST_HANDLE_STRUCT(gnttab_unmap_grant_ref);
* 2. Only a sufficiently-privileged domain may specify <dom> != DOMID_SELF.
* 3. Xen may not support more than a single grant-table page per domain.
*/
-#define GNTTABOP_setup_table 2
struct gnttab_setup_table {
/* IN parameters. */
domid_t dom;
@@ -301,7 +335,6 @@ DEFINE_GUEST_HANDLE_STRUCT(gnttab_setup_table);
* GNTTABOP_dump_table: Dump the contents of the grant table to the
* xen console. Debugging use only.
*/
-#define GNTTABOP_dump_table 3
struct gnttab_dump_table {
/* IN parameters. */
domid_t dom;
@@ -311,17 +344,17 @@ struct gnttab_dump_table {
DEFINE_GUEST_HANDLE_STRUCT(gnttab_dump_table);
/*
- * GNTTABOP_transfer_grant_ref: Transfer <frame> to a foreign domain. The
- * foreign domain has previously registered its interest in the transfer via
- * <domid, ref>.
+ * GNTTABOP_transfer: Transfer <frame> to a foreign domain. The foreign domain
+ * has previously registered its interest in the transfer via <domid, ref>.
*
* Note that, even if the transfer fails, the specified page no longer belongs
* to the calling domain *unless* the error is GNTST_bad_page.
+ *
+ * Note further that only PV guests can use this operation.
*/
-#define GNTTABOP_transfer 4
struct gnttab_transfer {
/* IN parameters. */
- xen_pfn_t mfn;
+ xen_pfn_t mfn;
domid_t domid;
grant_ref_t ref;
/* OUT parameters. */
@@ -352,21 +385,20 @@ DEFINE_GUEST_HANDLE_STRUCT(gnttab_transfer);
#define _GNTCOPY_dest_gref (1)
#define GNTCOPY_dest_gref (1<<_GNTCOPY_dest_gref)
-#define GNTTABOP_copy 5
struct gnttab_copy {
- /* IN parameters. */
- struct {
- union {
- grant_ref_t ref;
- xen_pfn_t gmfn;
- } u;
- domid_t domid;
- uint16_t offset;
- } source, dest;
- uint16_t len;
- uint16_t flags; /* GNTCOPY_* */
- /* OUT parameters. */
- int16_t status;
+ /* IN parameters. */
+ struct gnttab_copy_ptr {
+ union {
+ grant_ref_t ref;
+ xen_pfn_t gmfn;
+ } u;
+ domid_t domid;
+ uint16_t offset;
+ } source, dest;
+ uint16_t len;
+ uint16_t flags; /* GNTCOPY_* */
+ /* OUT parameters. */
+ int16_t status;
};
DEFINE_GUEST_HANDLE_STRUCT(gnttab_copy);
@@ -377,7 +409,6 @@ DEFINE_GUEST_HANDLE_STRUCT(gnttab_copy);
* 1. <dom> may be specified as DOMID_SELF.
* 2. Only a sufficiently-privileged domain may specify <dom> != DOMID_SELF.
*/
-#define GNTTABOP_query_size 6
struct gnttab_query_size {
/* IN parameters. */
domid_t dom;
@@ -399,7 +430,6 @@ DEFINE_GUEST_HANDLE_STRUCT(gnttab_query_size);
* 2. After executing a batch of unmaps, it is guaranteed that no stale
* mappings will remain in the device or host TLBs.
*/
-#define GNTTABOP_unmap_and_replace 7
struct gnttab_unmap_and_replace {
/* IN parameters. */
uint64_t host_addr;
@@ -412,14 +442,12 @@ DEFINE_GUEST_HANDLE_STRUCT(gnttab_unmap_and_replace);
/*
* GNTTABOP_set_version: Request a particular version of the grant
- * table shared table structure. This operation can only be performed
- * once in any given domain. It must be performed before any grants
- * are activated; otherwise, the domain will be stuck with version 1.
- * The only defined versions are 1 and 2.
+ * table shared table structure. This operation may be used to toggle
+ * between different versions, but must be performed while no grants
+ * are active. The only defined versions are 1 and 2.
*/
-#define GNTTABOP_set_version 8
struct gnttab_set_version {
- /* IN parameters */
+ /* IN/OUT parameters */
uint32_t version;
};
DEFINE_GUEST_HANDLE_STRUCT(gnttab_set_version);
@@ -436,7 +464,6 @@ DEFINE_GUEST_HANDLE_STRUCT(gnttab_set_version);
* 1. <dom> may be specified as DOMID_SELF.
* 2. Only a sufficiently-privileged domain may specify <dom> != DOMID_SELF.
*/
-#define GNTTABOP_get_status_frames 9
struct gnttab_get_status_frames {
/* IN parameters. */
uint32_t nr_frames;
@@ -451,7 +478,6 @@ DEFINE_GUEST_HANDLE_STRUCT(gnttab_get_status_frames);
* GNTTABOP_get_version: Get the grant table version which is in
* effect for domain <dom>.
*/
-#define GNTTABOP_get_version 10
struct gnttab_get_version {
/* IN parameters */
domid_t dom;
@@ -462,26 +488,37 @@ struct gnttab_get_version {
DEFINE_GUEST_HANDLE_STRUCT(gnttab_get_version);
/*
+ * GNTTABOP_swap_grant_ref: Swap the contents of two grant entries.
+ */
+struct gnttab_swap_grant_ref {
+ /* IN parameters */
+ grant_ref_t ref_a;
+ grant_ref_t ref_b;
+ /* OUT parameters */
+ int16_t status; /* GNTST_* */
+};
+DEFINE_GUEST_HANDLE_STRUCT(gnttab_swap_grant_ref);
+
+/*
* Issue one or more cache maintenance operations on a portion of a
* page granted to the calling domain by a foreign domain.
*/
-#define GNTTABOP_cache_flush 12
struct gnttab_cache_flush {
union {
uint64_t dev_bus_addr;
grant_ref_t ref;
} a;
- uint16_t offset; /* offset from start of grant */
- uint16_t length; /* size within the grant */
-#define GNTTAB_CACHE_CLEAN (1<<0)
-#define GNTTAB_CACHE_INVAL (1<<1)
-#define GNTTAB_CACHE_SOURCE_GREF (1<<31)
+ uint16_t offset; /* offset from start of grant */
+ uint16_t length; /* size within the grant */
+#define GNTTAB_CACHE_CLEAN (1u<<0)
+#define GNTTAB_CACHE_INVAL (1u<<1)
+#define GNTTAB_CACHE_SOURCE_GREF (1u<<31)
uint32_t op;
};
DEFINE_GUEST_HANDLE_STRUCT(gnttab_cache_flush);
/*
- * Bitfield values for update_pin_status.flags.
+ * Bitfield values for gnttab_map_grant_ref.flags.
*/
/* Map the grant entry for access by I/O devices. */
#define _GNTMAP_device_map (0)
@@ -531,6 +568,7 @@ DEFINE_GUEST_HANDLE_STRUCT(gnttab_cache_flush);
#define GNTST_bad_copy_arg (-10) /* copy arguments cross page boundary. */
#define GNTST_address_too_big (-11) /* transfer page address too large. */
#define GNTST_eagain (-12) /* Operation not done; try again. */
+#define GNTST_no_space (-13) /* Out of space (handles etc). */
#define GNTTABOP_error_msgs { \
"okay", \
@@ -545,7 +583,8 @@ DEFINE_GUEST_HANDLE_STRUCT(gnttab_cache_flush);
"bad page", \
"copy arguments cross page boundary", \
"page address size too large", \
- "operation not done; try again" \
+ "operation not done; try again", \
+ "out of space", \
}
#endif /* __XEN_PUBLIC_GRANT_TABLE_H__ */
diff --git a/include/xen/interface/io/ring.h b/include/xen/interface/io/ring.h
index 2470ec45ebb2..ba4c4274b714 100644
--- a/include/xen/interface/io/ring.h
+++ b/include/xen/interface/io/ring.h
@@ -72,9 +72,8 @@ typedef unsigned int RING_IDX;
* of the shared memory area (PAGE_SIZE, for instance). To initialise
* the front half:
*
- * mytag_front_ring_t front_ring;
- * SHARED_RING_INIT((mytag_sring_t *)shared_page);
- * FRONT_RING_INIT(&front_ring, (mytag_sring_t *)shared_page, PAGE_SIZE);
+ * mytag_front_ring_t ring;
+ * XEN_FRONT_RING_INIT(&ring, (mytag_sring_t *)shared_page, PAGE_SIZE);
*
* Initializing the back follows similarly (note that only the front
* initializes the shared ring):
@@ -146,6 +145,11 @@ struct __name##_back_ring { \
#define FRONT_RING_INIT(_r, _s, __size) FRONT_RING_ATTACH(_r, _s, 0, __size)
+#define XEN_FRONT_RING_INIT(r, s, size) do { \
+ SHARED_RING_INIT(s); \
+ FRONT_RING_INIT(r, s, size); \
+} while (0)
+
#define BACK_RING_ATTACH(_r, _s, _i, __size) do { \
(_r)->rsp_prod_pvt = (_i); \
(_r)->req_cons = (_i); \
@@ -170,16 +174,21 @@ struct __name##_back_ring { \
(RING_FREE_REQUESTS(_r) == 0)
/* Test if there are outstanding messages to be processed on a ring. */
-#define RING_HAS_UNCONSUMED_RESPONSES(_r) \
+#define XEN_RING_NR_UNCONSUMED_RESPONSES(_r) \
((_r)->sring->rsp_prod - (_r)->rsp_cons)
-#define RING_HAS_UNCONSUMED_REQUESTS(_r) ({ \
+#define XEN_RING_NR_UNCONSUMED_REQUESTS(_r) ({ \
unsigned int req = (_r)->sring->req_prod - (_r)->req_cons; \
unsigned int rsp = RING_SIZE(_r) - \
((_r)->req_cons - (_r)->rsp_prod_pvt); \
req < rsp ? req : rsp; \
})
+#define RING_HAS_UNCONSUMED_RESPONSES(_r) \
+ (!!XEN_RING_NR_UNCONSUMED_RESPONSES(_r))
+#define RING_HAS_UNCONSUMED_REQUESTS(_r) \
+ (!!XEN_RING_NR_UNCONSUMED_REQUESTS(_r))
+
/* Direct access to individual ring elements, by index. */
#define RING_GET_REQUEST(_r, _idx) \
(&((_r)->sring->ring[((_idx) & (RING_SIZE(_r) - 1))].req))
diff --git a/include/xen/interface/io/vscsiif.h b/include/xen/interface/io/vscsiif.h
index 1f6047d3de44..7ea4dc9611c4 100644
--- a/include/xen/interface/io/vscsiif.h
+++ b/include/xen/interface/io/vscsiif.h
@@ -43,7 +43,7 @@
*
* A string specifying the backend device: either a 4-tuple "h:c:t:l"
* (host, controller, target, lun, all integers), or a WWN (e.g.
- * "naa.60014054ac780582").
+ * "naa.60014054ac780582:0").
*
* v-dev
* Values: string
@@ -87,6 +87,75 @@
* response structures.
*/
+/*
+ * Xenstore format in practice
+ * ===========================
+ *
+ * The backend driver uses a single_host:many_devices notation to manage domU
+ * devices. Everything is stored in /local/domain/<backend_domid>/backend/vscsi/.
+ * The xenstore layout looks like this (dom0 is assumed to be the backend_domid):
+ *
+ * <domid>/<vhost>/feature-host = "0"
+ * <domid>/<vhost>/frontend = "/local/domain/<domid>/device/vscsi/0"
+ * <domid>/<vhost>/frontend-id = "<domid>"
+ * <domid>/<vhost>/online = "1"
+ * <domid>/<vhost>/state = "4"
+ * <domid>/<vhost>/vscsi-devs/dev-0/p-dev = "8:0:2:1" or "naa.wwn:lun"
+ * <domid>/<vhost>/vscsi-devs/dev-0/state = "4"
+ * <domid>/<vhost>/vscsi-devs/dev-0/v-dev = "0:0:0:0"
+ * <domid>/<vhost>/vscsi-devs/dev-1/p-dev = "8:0:2:2"
+ * <domid>/<vhost>/vscsi-devs/dev-1/state = "4"
+ * <domid>/<vhost>/vscsi-devs/dev-1/v-dev = "0:0:1:0"
+ *
+ * The frontend driver maintains its state in
+ * /local/domain/<domid>/device/vscsi/.
+ *
+ * <vhost>/backend = "/local/domain/0/backend/vscsi/<domid>/<vhost>"
+ * <vhost>/backend-id = "0"
+ * <vhost>/event-channel = "20"
+ * <vhost>/ring-ref = "43"
+ * <vhost>/state = "4"
+ * <vhost>/vscsi-devs/dev-0/state = "4"
+ * <vhost>/vscsi-devs/dev-1/state = "4"
+ *
+ * In addition to the entries for backend and frontend these flags are stored
+ * for the toolstack:
+ *
+ * <domid>/<vhost>/vscsi-devs/dev-1/p-devname = "/dev/$device"
+ * <domid>/<vhost>/libxl_ctrl_index = "0"
+ *
+ *
+ * Backend/frontend protocol
+ * =========================
+ *
+ * To create a vhost along with a device:
+ * <domid>/<vhost>/feature-host = "0"
+ * <domid>/<vhost>/frontend = "/local/domain/<domid>/device/vscsi/0"
+ * <domid>/<vhost>/frontend-id = "<domid>"
+ * <domid>/<vhost>/online = "1"
+ * <domid>/<vhost>/state = "1"
+ * <domid>/<vhost>/vscsi-devs/dev-0/p-dev = "8:0:2:1"
+ * <domid>/<vhost>/vscsi-devs/dev-0/state = "1"
+ * <domid>/<vhost>/vscsi-devs/dev-0/v-dev = "0:0:0:0"
+ * Wait for <domid>/<vhost>/state + <domid>/<vhost>/vscsi-devs/dev-0/state become 4
+ *
+ * To add another device to a vhost:
+ * <domid>/<vhost>/state = "7"
+ * <domid>/<vhost>/vscsi-devs/dev-1/p-dev = "8:0:2:2"
+ * <domid>/<vhost>/vscsi-devs/dev-1/state = "1"
+ * <domid>/<vhost>/vscsi-devs/dev-1/v-dev = "0:0:1:0"
+ * Wait for <domid>/<vhost>/state + <domid>/<vhost>/vscsi-devs/dev-1/state become 4
+ *
+ * To remove a device from a vhost:
+ * <domid>/<vhost>/state = "7"
+ * <domid>/<vhost>/vscsi-devs/dev-1/state = "5"
+ * Wait for <domid>/<vhost>/state to become 4
+ * Wait for <domid>/<vhost>/vscsi-devs/dev-1/state become 6
+ * Remove <domid>/<vhost>/vscsi-devs/dev-1/{state,p-dev,v-dev,p-devname}
+ * Remove <domid>/<vhost>/vscsi-devs/dev-1/
+ *
+ */
+
/* Requests from the frontend to the backend */
/*
@@ -117,7 +186,8 @@
* (plus the set VSCSIIF_SG_GRANT bit), the number of scsiif_request_segment
* elements referencing the target data buffers is calculated from the lengths
* of the seg[] elements (the sum of all valid seg[].length divided by the
- * size of one scsiif_request_segment structure).
+ * size of one scsiif_request_segment structure). The frontend may use a mix of
+ * direct and indirect requests.
*/
#define VSCSIIF_ACT_SCSI_CDB 1
@@ -154,12 +224,14 @@
/*
* based on Linux kernel 2.6.18, still valid
+ *
* Changing these values requires support of multiple protocols via the rings
* as "old clients" will blindly use these values and the resulting structure
* sizes.
*/
#define VSCSIIF_MAX_COMMAND_SIZE 16
#define VSCSIIF_SENSE_BUFFERSIZE 96
+#define VSCSIIF_PAGE_SIZE 4096
struct scsiif_request_segment {
grant_ref_t gref;
@@ -167,7 +239,8 @@ struct scsiif_request_segment {
uint16_t length;
};
-#define VSCSIIF_SG_PER_PAGE (PAGE_SIZE / sizeof(struct scsiif_request_segment))
+#define VSCSIIF_SG_PER_PAGE (VSCSIIF_PAGE_SIZE / \
+ sizeof(struct scsiif_request_segment))
/* Size of one request is 252 bytes */
struct vscsiif_request {
@@ -207,6 +280,58 @@ struct vscsiif_response {
uint32_t reserved[36];
};
+/* SCSI I/O status from vscsiif_response->rslt */
+#define XEN_VSCSIIF_RSLT_STATUS(x) ((x) & 0x00ff)
+
+/* Host I/O status from vscsiif_response->rslt */
+#define XEN_VSCSIIF_RSLT_HOST(x) (((x) & 0x00ff0000) >> 16)
+#define XEN_VSCSIIF_RSLT_HOST_OK 0
+/* Couldn't connect before timeout */
+#define XEN_VSCSIIF_RSLT_HOST_NO_CONNECT 1
+/* Bus busy through timeout */
+#define XEN_VSCSIIF_RSLT_HOST_BUS_BUSY 2
+/* Timed out for other reason */
+#define XEN_VSCSIIF_RSLT_HOST_TIME_OUT 3
+/* Bad target */
+#define XEN_VSCSIIF_RSLT_HOST_BAD_TARGET 4
+/* Abort for some other reason */
+#define XEN_VSCSIIF_RSLT_HOST_ABORT 5
+/* Parity error */
+#define XEN_VSCSIIF_RSLT_HOST_PARITY 6
+/* Internal error */
+#define XEN_VSCSIIF_RSLT_HOST_ERROR 7
+/* Reset by somebody */
+#define XEN_VSCSIIF_RSLT_HOST_RESET 8
+/* Unexpected interrupt */
+#define XEN_VSCSIIF_RSLT_HOST_BAD_INTR 9
+/* Force command past mid-layer */
+#define XEN_VSCSIIF_RSLT_HOST_PASSTHROUGH 10
+/* Retry requested */
+#define XEN_VSCSIIF_RSLT_HOST_SOFT_ERROR 11
+/* Hidden retry requested */
+#define XEN_VSCSIIF_RSLT_HOST_IMM_RETRY 12
+/* Requeue command requested */
+#define XEN_VSCSIIF_RSLT_HOST_REQUEUE 13
+/* Transport error disrupted I/O */
+#define XEN_VSCSIIF_RSLT_HOST_TRANSPORT_DISRUPTED 14
+/* Transport class fastfailed */
+#define XEN_VSCSIIF_RSLT_HOST_TRANSPORT_FAILFAST 15
+/* Permanent target failure */
+#define XEN_VSCSIIF_RSLT_HOST_TARGET_FAILURE 16
+/* Permanent nexus failure on path */
+#define XEN_VSCSIIF_RSLT_HOST_NEXUS_FAILURE 17
+/* Space allocation on device failed */
+#define XEN_VSCSIIF_RSLT_HOST_ALLOC_FAILURE 18
+/* Medium error */
+#define XEN_VSCSIIF_RSLT_HOST_MEDIUM_ERROR 19
+/* Transport marginal errors */
+#define XEN_VSCSIIF_RSLT_HOST_TRANSPORT_MARGINAL 20
+
+/* Result values of reset operations */
+#define XEN_VSCSIIF_RSLT_RESET_SUCCESS 0x2002
+#define XEN_VSCSIIF_RSLT_RESET_FAILED 0x2003
+
DEFINE_RING_TYPES(vscsiif, struct vscsiif_request, struct vscsiif_response);
-#endif /*__XEN__PUBLIC_IO_SCSI_H__*/
+
+#endif /*__XEN__PUBLIC_IO_SCSI_H__*/
diff --git a/include/xen/interface/io/xs_wire.h b/include/xen/interface/io/xs_wire.h
index d40a44f09b16..b62365478ac0 100644
--- a/include/xen/interface/io/xs_wire.h
+++ b/include/xen/interface/io/xs_wire.h
@@ -10,7 +10,8 @@
enum xsd_sockmsg_type
{
- XS_DEBUG,
+ XS_CONTROL,
+#define XS_DEBUG XS_CONTROL
XS_DIRECTORY,
XS_READ,
XS_GET_PERMS,
@@ -30,8 +31,13 @@ enum xsd_sockmsg_type
XS_IS_DOMAIN_INTRODUCED,
XS_RESUME,
XS_SET_TARGET,
- XS_RESTRICT,
- XS_RESET_WATCHES,
+ /* XS_RESTRICT has been removed */
+ XS_RESET_WATCHES = XS_SET_TARGET + 2,
+ XS_DIRECTORY_PART,
+
+ XS_TYPE_COUNT, /* Number of valid types. */
+
+ XS_INVALID = 0xffff /* Guaranteed to remain an invalid type */
};
#define XS_WRITE_NONE "NONE"
@@ -59,7 +65,8 @@ static struct xsd_errors xsd_errors[] __attribute__((unused)) = {
XSD_ERROR(EROFS),
XSD_ERROR(EBUSY),
XSD_ERROR(EAGAIN),
- XSD_ERROR(EISCONN)
+ XSD_ERROR(EISCONN),
+ XSD_ERROR(E2BIG)
};
struct xsd_sockmsg
@@ -87,9 +94,31 @@ struct xenstore_domain_interface {
char rsp[XENSTORE_RING_SIZE]; /* Replies and async watch events. */
XENSTORE_RING_IDX req_cons, req_prod;
XENSTORE_RING_IDX rsp_cons, rsp_prod;
+ uint32_t server_features; /* Bitmap of features supported by the server */
+ uint32_t connection;
+ uint32_t error;
};
/* Violating this is very bad. See docs/misc/xenstore.txt. */
#define XENSTORE_PAYLOAD_MAX 4096
+/* Violating these just gets you an error back */
+#define XENSTORE_ABS_PATH_MAX 3072
+#define XENSTORE_REL_PATH_MAX 2048
+
+/* The ability to reconnect a ring */
+#define XENSTORE_SERVER_FEATURE_RECONNECTION 1
+/* The presence of the "error" field in the ring page */
+#define XENSTORE_SERVER_FEATURE_ERROR 2
+
+/* Valid values for the connection field */
+#define XENSTORE_CONNECTED 0 /* the steady-state */
+#define XENSTORE_RECONNECT 1 /* guest has initiated a reconnect */
+
+/* Valid values for the error field */
+#define XENSTORE_ERROR_NONE 0 /* No error */
+#define XENSTORE_ERROR_COMM 1 /* Communication problem */
+#define XENSTORE_ERROR_RINGIDX 2 /* Invalid ring index */
+#define XENSTORE_ERROR_PROTO 3 /* Protocol violation (payload too long) */
+
#endif /* _XS_WIRE_H */
diff --git a/include/xen/xenbus.h b/include/xen/xenbus.h
index b13eb86395e0..eaa932b99d8a 100644
--- a/include/xen/xenbus.h
+++ b/include/xen/xenbus.h
@@ -224,8 +224,10 @@ int xenbus_watch_pathfmt(struct xenbus_device *dev, struct xenbus_watch *watch,
const char *pathfmt, ...);
int xenbus_switch_state(struct xenbus_device *dev, enum xenbus_state new_state);
-int xenbus_grant_ring(struct xenbus_device *dev, void *vaddr,
+int xenbus_setup_ring(struct xenbus_device *dev, gfp_t gfp, void **vaddr,
unsigned int nr_pages, grant_ref_t *grefs);
+void xenbus_teardown_ring(void **vaddr, unsigned int nr_pages,
+ grant_ref_t *grefs);
int xenbus_map_ring_valloc(struct xenbus_device *dev, grant_ref_t *gnt_refs,
unsigned int nr_grefs, void **vaddr);
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-07 16:16:06 +0300