linux-stable/fs/nfsd/blocklayoutxdr.h
Chuck Lever 82e93bab50 NFSD: Make @gdev parameter of ->encode_getdeviceinfo a const pointer
This enables callers to be passed const pointer parameters.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:29 -04:00

62 lines
1.4 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _NFSD_BLOCKLAYOUTXDR_H
#define _NFSD_BLOCKLAYOUTXDR_H 1
#include <linux/blkdev.h>
#include "xdr4.h"
struct iomap;
struct xdr_stream;
struct pnfs_block_extent {
struct nfsd4_deviceid vol_id;
u64 foff;
u64 len;
u64 soff;
enum pnfs_block_extent_state es;
};
struct pnfs_block_range {
u64 foff;
u64 len;
};
/*
* Random upper cap for the uuid length to avoid unbounded allocation.
* Not actually limited by the protocol.
*/
#define PNFS_BLOCK_UUID_LEN 128
struct pnfs_block_volume {
enum pnfs_block_volume_type type;
union {
struct {
u64 offset;
u32 sig_len;
u8 sig[PNFS_BLOCK_UUID_LEN];
} simple;
struct {
enum scsi_code_set code_set;
enum scsi_designator_type designator_type;
int designator_len;
u8 designator[256];
u64 pr_key;
} scsi;
};
};
struct pnfs_block_deviceaddr {
u32 nr_volumes;
struct pnfs_block_volume volumes[];
};
__be32 nfsd4_block_encode_getdeviceinfo(struct xdr_stream *xdr,
const struct nfsd4_getdeviceinfo *gdp);
__be32 nfsd4_block_encode_layoutget(struct xdr_stream *xdr,
const struct nfsd4_layoutget *lgp);
int nfsd4_block_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp,
u32 block_size);
int nfsd4_scsi_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp,
u32 block_size);
#endif /* _NFSD_BLOCKLAYOUTXDR_H */