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 * Default data server connection timeout and retrans vaules. 37 * Set by module paramters dataserver_timeo and dataserver_retrans. 38 */ 39 #define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */ 40 #define NFS4_DEF_DS_RETRANS 5 41 42 /* 43 * Field testing shows we need to support up to 4096 stripe indices. 44 * We store each index as a u8 (u32 on the wire) to keep the memory footprint 45 * reasonable. This in turn means we support a maximum of 256 46 * RFC 5661 multipath_list4 structures. 47 */ 48 #define NFS4_PNFS_MAX_STRIPE_CNT 4096 49 #define NFS4_PNFS_MAX_MULTI_CNT 256 /* 256 fit into a u8 stripe_index */ 50 51 /* error codes for internal use */ 52 #define NFS4ERR_RESET_TO_MDS 12001 53 54 enum stripetype4 { 55 STRIPE_SPARSE = 1, 56 STRIPE_DENSE = 2 57 }; 58 59 /* Individual ip address */ 60 struct nfs4_pnfs_ds_addr { 61 struct sockaddr_storage da_addr; 62 size_t da_addrlen; 63 struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */ 64 char *da_remotestr; /* human readable addr+port */ 65 }; 66 67 struct nfs4_pnfs_ds { 68 struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */ 69 char *ds_remotestr; /* comma sep list of addrs */ 70 struct list_head ds_addrs; 71 struct nfs_client *ds_clp; 72 atomic_t ds_count; 73 unsigned long ds_state; 74 #define NFS4DS_CONNECTING 0 /* ds is establishing connection */ 75 }; 76 77 struct nfs4_file_layout_dsaddr { 78 struct nfs4_deviceid_node id_node; 79 u32 stripe_count; 80 u8 *stripe_indices; 81 u32 ds_num; 82 struct nfs4_pnfs_ds *ds_list[1]; 83 }; 84 85 struct nfs4_filelayout_segment { 86 struct pnfs_layout_segment generic_hdr; 87 u32 stripe_type; 88 u32 commit_through_mds; 89 u32 stripe_unit; 90 u32 first_stripe_index; 91 u64 pattern_offset; 92 struct nfs4_file_layout_dsaddr *dsaddr; /* Point to GETDEVINFO data */ 93 unsigned int num_fh; 94 struct nfs_fh **fh_array; 95 }; 96 97 struct nfs4_filelayout { 98 struct pnfs_layout_hdr generic_hdr; 99 struct pnfs_ds_commit_info commit_info; 100 }; 101 102 static inline struct nfs4_filelayout * 103 FILELAYOUT_FROM_HDR(struct pnfs_layout_hdr *lo) 104 { 105 return container_of(lo, struct nfs4_filelayout, generic_hdr); 106 } 107 108 static inline struct nfs4_filelayout_segment * 109 FILELAYOUT_LSEG(struct pnfs_layout_segment *lseg) 110 { 111 return container_of(lseg, 112 struct nfs4_filelayout_segment, 113 generic_hdr); 114 } 115 116 static inline struct nfs4_deviceid_node * 117 FILELAYOUT_DEVID_NODE(struct pnfs_layout_segment *lseg) 118 { 119 return &FILELAYOUT_LSEG(lseg)->dsaddr->id_node; 120 } 121 122 static inline void 123 filelayout_mark_devid_invalid(struct nfs4_deviceid_node *node) 124 { 125 u32 *p = (u32 *)&node->deviceid; 126 127 printk(KERN_WARNING "NFS: Deviceid [%x%x%x%x] marked out of use.\n", 128 p[0], p[1], p[2], p[3]); 129 130 set_bit(NFS_DEVICEID_INVALID, &node->flags); 131 } 132 133 static inline bool 134 filelayout_test_devid_invalid(struct nfs4_deviceid_node *node) 135 { 136 return test_bit(NFS_DEVICEID_INVALID, &node->flags); 137 } 138 139 extern bool 140 filelayout_test_devid_unavailable(struct nfs4_deviceid_node *node); 141 142 extern struct nfs_fh * 143 nfs4_fl_select_ds_fh(struct pnfs_layout_segment *lseg, u32 j); 144 145 extern void print_ds(struct nfs4_pnfs_ds *ds); 146 u32 nfs4_fl_calc_j_index(struct pnfs_layout_segment *lseg, loff_t offset); 147 u32 nfs4_fl_calc_ds_index(struct pnfs_layout_segment *lseg, u32 j); 148 struct nfs4_pnfs_ds *nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg, 149 u32 ds_idx); 150 151 extern struct nfs4_file_layout_dsaddr * 152 nfs4_fl_alloc_deviceid_node(struct nfs_server *server, 153 struct pnfs_device *pdev, gfp_t gfp_flags); 154 extern void nfs4_fl_put_deviceid(struct nfs4_file_layout_dsaddr *dsaddr); 155 extern void nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr); 156 157 #endif /* FS_NFS_NFS4FILELAYOUT_H */ 158