^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * NFSv4 file layout driver data structures.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 2002
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * The Regents of the University of Michigan
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * All Rights Reserved
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Dean Hildebrand <dhildebz@umich.edu>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Permission is granted to use, copy, create derivative works, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * redistribute this software and such derivative works for any purpose,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * so long as the name of the University of Michigan is not used in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * any advertising or publicity pertaining to the use or distribution
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * of this software without specific, written prior authorization. If
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * the above copyright notice or any other identification of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * University of Michigan is included in any copy of any portion of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * this software, then the disclaimer below must also be included.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * This software is provided as is, without representation or warranty
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * of any kind either express or implied, including without limitation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * the implied warranties of merchantability, fitness for a particular
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * purpose, or noninfringement. The Regents of the University of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * Michigan shall not be liable for any damages, including special,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * indirect, incidental, or consequential damages, with respect to any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * claim arising out of or in connection with the use of the software,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * even if it has been or is hereafter advised of the possibility of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * such damages.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #ifndef FS_NFS_NFS4FILELAYOUT_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define FS_NFS_NFS4FILELAYOUT_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include "../pnfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * Field testing shows we need to support up to 4096 stripe indices.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * We store each index as a u8 (u32 on the wire) to keep the memory footprint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * reasonable. This in turn means we support a maximum of 256
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * RFC 5661 multipath_list4 structures.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define NFS4_PNFS_MAX_STRIPE_CNT 4096
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define NFS4_PNFS_MAX_MULTI_CNT 256 /* 256 fit into a u8 stripe_index */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) enum stripetype4 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) STRIPE_SPARSE = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) STRIPE_DENSE = 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct nfs4_file_layout_dsaddr {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct nfs4_deviceid_node id_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) u32 stripe_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) u8 *stripe_indices;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) u32 ds_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct nfs4_pnfs_ds *ds_list[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct nfs4_filelayout_segment {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct pnfs_layout_segment generic_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) u32 stripe_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) u32 commit_through_mds;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) u32 stripe_unit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) u32 first_stripe_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) u64 pattern_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct nfs4_deviceid deviceid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct nfs4_file_layout_dsaddr *dsaddr; /* Point to GETDEVINFO data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) unsigned int num_fh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct nfs_fh **fh_array;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct nfs4_filelayout {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct pnfs_layout_hdr generic_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) struct pnfs_ds_commit_info commit_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) static inline struct nfs4_filelayout *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) FILELAYOUT_FROM_HDR(struct pnfs_layout_hdr *lo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return container_of(lo, struct nfs4_filelayout, generic_hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static inline struct nfs4_filelayout_segment *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) FILELAYOUT_LSEG(struct pnfs_layout_segment *lseg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return container_of(lseg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct nfs4_filelayout_segment,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) generic_hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static inline struct nfs4_deviceid_node *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) FILELAYOUT_DEVID_NODE(struct pnfs_layout_segment *lseg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return &FILELAYOUT_LSEG(lseg)->dsaddr->id_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) static inline bool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) filelayout_test_devid_invalid(struct nfs4_deviceid_node *node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return test_bit(NFS_DEVICEID_INVALID, &node->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) extern bool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) filelayout_test_devid_unavailable(struct nfs4_deviceid_node *node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) extern struct nfs_fh *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) nfs4_fl_select_ds_fh(struct pnfs_layout_segment *lseg, u32 j);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) u32 nfs4_fl_calc_j_index(struct pnfs_layout_segment *lseg, loff_t offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) u32 nfs4_fl_calc_ds_index(struct pnfs_layout_segment *lseg, u32 j);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) struct nfs4_pnfs_ds *nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) u32 ds_idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) extern struct nfs4_file_layout_dsaddr *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) nfs4_fl_alloc_deviceid_node(struct nfs_server *server,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct pnfs_device *pdev, gfp_t gfp_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) extern void nfs4_fl_put_deviceid(struct nfs4_file_layout_dsaddr *dsaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) extern void nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #endif /* FS_NFS_NFS4FILELAYOUT_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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