1 files changed, 105 insertions, 0 deletions
diff --git a/fs/nfs/nfs4filelayout.h b/fs/nfs/nfs4filelayout.h
new file mode 100644
index 000000000000..cebe01e3795e
--- /dev/null
+++ b/fs/nfs/nfs4filelayout.h
@@ -0,0 +1,105 @@
+/*
+ *  NFSv4 file layout driver data structures.
+ *
+ *  Copyright (c) 2002
+ *  The Regents of the University of Michigan
+ *  All Rights Reserved
+ *
+ *  Dean Hildebrand <dhildebz@umich.edu>
+ *
+ *  Permission is granted to use, copy, create derivative works, and
+ *  redistribute this software and such derivative works for any purpose,
+ *  so long as the name of the University of Michigan is not used in
+ *  any advertising or publicity pertaining to the use or distribution
+ *  of this software without specific, written prior authorization. If
+ *  the above copyright notice or any other identification of the
+ *  University of Michigan is included in any copy of any portion of
+ *  this software, then the disclaimer below must also be included.
+ *
+ *  This software is provided as is, without representation or warranty
+ *  of any kind either express or implied, including without limitation
+ *  the implied warranties of merchantability, fitness for a particular
+ *  purpose, or noninfringement.  The Regents of the University of
+ *  Michigan shall not be liable for any damages, including special,
+ *  indirect, incidental, or consequential damages, with respect to any
+ *  claim arising out of or in connection with the use of the software,
+ *  even if it has been or is hereafter advised of the possibility of
+ *  such damages.
+ */
+#ifndef FS_NFS_NFS4FILELAYOUT_H
+#define FS_NFS_NFS4FILELAYOUT_H
+#include "pnfs.h"
+/*
+ * Field testing shows we need to support up to 4096 stripe indices.
+ * We store each index as a u8 (u32 on the wire) to keep the memory footprint
+ * reasonable. This in turn means we support a maximum of 256
+ * RFC 5661 multipath_list4 structures.
+ */
+#define NFS4_PNFS_MAX_STRIPE_CNT 4096
+#define NFS4_PNFS_MAX_MULTI_CNT  256 /* 256 fit into a u8 stripe_index */
+enum stripetype4 {
+        STRIPE_SPARSE = 1,
+        STRIPE_DENSE = 2
+};
+/* Individual ip address */
+struct nfs4_pnfs_ds {
+        struct list_head        ds_node;  /* nfs4_pnfs_dev_hlist dev_dslist */
+        u32                     ds_ip_addr;
+        u32                     ds_port;
+        struct nfs_client       *ds_clp;
+        atomic_t                ds_count;
+};
+/* nfs4_file_layout_dsaddr flags */
+#define NFS4_DEVICE_ID_NEG_ENTRY        0x00000001
+struct nfs4_file_layout_dsaddr {
+        struct nfs4_deviceid_node       id_node;
+        unsigned long                   flags;
+        u32                             stripe_count;
+        u8                              *stripe_indices;
+        u32                             ds_num;
+        struct nfs4_pnfs_ds             *ds_list[1];
+};
+struct nfs4_filelayout_segment {
+        struct pnfs_layout_segment generic_hdr;
+        u32 stripe_type;
+        u32 commit_through_mds;
+        u32 stripe_unit;
+        u32 first_stripe_index;
+        u64 pattern_offset;
+        struct nfs4_file_layout_dsaddr *dsaddr; /* Point to GETDEVINFO data */
+        unsigned int num_fh;
+        struct nfs_fh **fh_array;
+        struct list_head *commit_buckets; /* Sort commits to ds */
+        int number_of_buckets;
+};
+static inline struct nfs4_filelayout_segment *
+FILELAYOUT_LSEG(struct pnfs_layout_segment *lseg)
+{
+        return container_of(lseg,
+                            struct nfs4_filelayout_segment,
+                            generic_hdr);
+}
+extern struct nfs_fh *
+nfs4_fl_select_ds_fh(struct pnfs_layout_segment *lseg, u32 j);
+extern void print_ds(struct nfs4_pnfs_ds *ds);
+u32 nfs4_fl_calc_j_index(struct pnfs_layout_segment *lseg, loff_t offset);
+u32 nfs4_fl_calc_ds_index(struct pnfs_layout_segment *lseg, u32 j);
+struct nfs4_pnfs_ds *nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg,
+                                        u32 ds_idx);
+extern void nfs4_fl_put_deviceid(struct nfs4_file_layout_dsaddr *dsaddr);
+extern void nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr);
+struct nfs4_file_layout_dsaddr *
+get_device_info(struct inode *inode, struct nfs4_deviceid *dev_id, gfp_t gfp_flags);
+#endif /* FS_NFS_NFS4FILELAYOUT_H */

diff --git a/fs/nfs/nfs4filelayout.h b/fs/nfs/nfs4filelayout.h new file mode 100644 index 000000000000..cebe01e3795e --- /dev/null +++ b/fs/nfs/nfs4filelayout.h
@@ -0,0 +1,105 @@
	1	/*
	2	* NFSv4 file layout driver data structures.
	3	*
	4	* Copyright (c) 2002
	5	* The Regents of the University of Michigan
	6	* All Rights Reserved
	7	*
	8	* Dean Hildebrand <dhildebz@umich.edu>
	9	*
	10	* Permission is granted to use, copy, create derivative works, and
	11	* redistribute this software and such derivative works for any purpose,
	12	* so long as the name of the University of Michigan is not used in
	13	* any advertising or publicity pertaining to the use or distribution
	14	* of this software without specific, written prior authorization. If
	15	* the above copyright notice or any other identification of the
	16	* University of Michigan is included in any copy of any portion of
	17	* this software, then the disclaimer below must also be included.
	18	*
	19	* This software is provided as is, without representation or warranty
	20	* of any kind either express or implied, including without limitation
	21	* the implied warranties of merchantability, fitness for a particular
	22	* purpose, or noninfringement. The Regents of the University of
	23	* Michigan shall not be liable for any damages, including special,
	24	* indirect, incidental, or consequential damages, with respect to any
	25	* claim arising out of or in connection with the use of the software,
	26	* even if it has been or is hereafter advised of the possibility of
	27	* such damages.
	28	*/
	29
	30	#ifndef FS_NFS_NFS4FILELAYOUT_H
	31	#define FS_NFS_NFS4FILELAYOUT_H
	32
	33	#include "pnfs.h"
	34
	35	/*
	36	* Field testing shows we need to support up to 4096 stripe indices.
	37	* We store each index as a u8 (u32 on the wire) to keep the memory footprint
	38	* reasonable. This in turn means we support a maximum of 256
	39	* RFC 5661 multipath_list4 structures.
	40	*/
	41	#define NFS4_PNFS_MAX_STRIPE_CNT 4096
	42	#define NFS4_PNFS_MAX_MULTI_CNT 256 /* 256 fit into a u8 stripe_index */
	43
	44	enum stripetype4 {
	45	STRIPE_SPARSE = 1,
	46	STRIPE_DENSE = 2
	47	};
	48
	49	/* Individual ip address */
	50	struct nfs4_pnfs_ds {
	51	struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */
	52	u32 ds_ip_addr;
	53	u32 ds_port;
	54	struct nfs_client *ds_clp;
	55	atomic_t ds_count;
	56	};
	57
	58	/* nfs4_file_layout_dsaddr flags */
	59	#define NFS4_DEVICE_ID_NEG_ENTRY 0x00000001
	60
	61	struct nfs4_file_layout_dsaddr {
	62	struct nfs4_deviceid_node id_node;
	63	unsigned long flags;
	64	u32 stripe_count;
	65	u8 *stripe_indices;
	66	u32 ds_num;
	67	struct nfs4_pnfs_ds *ds_list[1];
	68	};
	69
	70	struct nfs4_filelayout_segment {
	71	struct pnfs_layout_segment generic_hdr;
	72	u32 stripe_type;
	73	u32 commit_through_mds;
	74	u32 stripe_unit;
	75	u32 first_stripe_index;
	76	u64 pattern_offset;
	77	struct nfs4_file_layout_dsaddr dsaddr; / Point to GETDEVINFO data */
	78	unsigned int num_fh;
	79	struct nfs_fh **fh_array;
	80	struct list_head commit_buckets; / Sort commits to ds */
	81	int number_of_buckets;
	82	};
	83
	84	static inline struct nfs4_filelayout_segment *
	85	FILELAYOUT_LSEG(struct pnfs_layout_segment *lseg)
	86	{
	87	return container_of(lseg,
	88	struct nfs4_filelayout_segment,
	89	generic_hdr);
	90	}
	91
	92	extern struct nfs_fh *
	93	nfs4_fl_select_ds_fh(struct pnfs_layout_segment *lseg, u32 j);
	94
	95	extern void print_ds(struct nfs4_pnfs_ds *ds);
	96	u32 nfs4_fl_calc_j_index(struct pnfs_layout_segment *lseg, loff_t offset);
	97	u32 nfs4_fl_calc_ds_index(struct pnfs_layout_segment *lseg, u32 j);
	98	struct nfs4_pnfs_ds nfs4_fl_prepare_ds(struct pnfs_layout_segment lseg,
	99	u32 ds_idx);
	100	extern void nfs4_fl_put_deviceid(struct nfs4_file_layout_dsaddr *dsaddr);
	101	extern void nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr);
	102	struct nfs4_file_layout_dsaddr *
	103	get_device_info(struct inode inode, struct nfs4_deviceid dev_id, gfp_t gfp_flags);
	104
	105	#endif /* FS_NFS_NFS4FILELAYOUT_H */