1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2008 Isilon Inc http://www.isilon.com/ 5 * Copyright (c) 2013 Spectra Logic Corporation 6 * 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 /* $FreeBSD$ */ 30 31 #ifndef _NFS_FHA_NEW_H 32 #define _NFS_FHA_NEW_H 1 33 34 #ifdef _KERNEL 35 36 #define FHANEW_SERVER_NAME "nfsd" 37 38 /* Sysctl defaults. */ 39 #define FHA_DEF_ENABLE 1 40 #define FHA_DEF_READ 1 41 #define FHA_DEF_WRITE 1 42 #define FHA_DEF_BIN_SHIFT 22 /* 4MB */ 43 #define FHA_DEF_MAX_NFSDS_PER_FH 8 44 #define FHA_DEF_MAX_REQS_PER_NFSD 0 /* Unlimited */ 45 46 #define FHA_HASH_SIZE 251 47 48 struct fha_ctls { 49 int enable; 50 int read; 51 int write; 52 uint32_t bin_shift; 53 uint32_t max_nfsds_per_fh; 54 uint32_t max_reqs_per_nfsd; 55 }; 56 57 /* 58 * These are the entries in the filehandle hash. They talk about a specific 59 * file, requests against which are being handled by one or more nfsds. We 60 * keep a chain of nfsds against the file. We only have more than one if reads 61 * are ongoing, and then only if the reads affect disparate regions of the 62 * file. 63 * 64 * In general, we want to assign a new request to an existing nfsd if it is 65 * going to contend with work happening already on that nfsd, or if the 66 * operation is a read and the nfsd is already handling a proximate read. We 67 * do this to avoid jumping around in the read stream unnecessarily, and to 68 * avoid contention between threads over single files. 69 */ 70 struct fha_hash_entry { 71 struct mtx *mtx; 72 LIST_ENTRY(fha_hash_entry) link; 73 u_int64_t fh; 74 u_int32_t num_rw; 75 u_int32_t num_exclusive; 76 u_int8_t num_threads; 77 struct svcthread_list threads; 78 }; 79 80 LIST_HEAD(fha_hash_entry_list, fha_hash_entry); 81 82 struct fha_hash_slot { 83 struct fha_hash_entry_list list; 84 struct mtx mtx; 85 }; 86 87 /* A structure used for passing around data internally. */ 88 struct fha_info { 89 u_int64_t fh; 90 off_t offset; 91 int locktype; 92 int read; 93 int write; 94 }; 95 96 struct fha_params { 97 struct fha_hash_slot fha_hash[FHA_HASH_SIZE]; 98 struct sysctl_ctx_list sysctl_ctx; 99 struct sysctl_oid *sysctl_tree; 100 struct fha_ctls ctls; 101 char server_name[32]; 102 SVCPOOL **pool; 103 }; 104 105 SVCTHREAD *fhanew_assign(SVCTHREAD *this_thread, struct svc_req *req); 106 void fhanew_nd_complete(SVCTHREAD *, struct svc_req *); 107 #endif /* _KERNEL */ 108 109 #endif /* _NFS_FHA_NEW_H */ 110