~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/fs/nfs/filelayout/filelayout.h

Version: ~ [ linux-5.4-rc3 ] ~ [ linux-5.3.6 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.79 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.149 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.196 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.196 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.75 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 struct nfs4_file_layout_dsaddr {
 50         struct nfs4_deviceid_node       id_node;
 51         u32                             stripe_count;
 52         u8                              *stripe_indices;
 53         u32                             ds_num;
 54         struct nfs4_pnfs_ds             *ds_list[1];
 55 };
 56 
 57 struct nfs4_filelayout_segment {
 58         struct pnfs_layout_segment      generic_hdr;
 59         u32                             stripe_type;
 60         u32                             commit_through_mds;
 61         u32                             stripe_unit;
 62         u32                             first_stripe_index;
 63         u64                             pattern_offset;
 64         struct nfs4_deviceid            deviceid;
 65         struct nfs4_file_layout_dsaddr  *dsaddr; /* Point to GETDEVINFO data */
 66         unsigned int                    num_fh;
 67         struct nfs_fh                   **fh_array;
 68 };
 69 
 70 struct nfs4_filelayout {
 71         struct pnfs_layout_hdr generic_hdr;
 72         struct pnfs_ds_commit_info commit_info;
 73 };
 74 
 75 static inline struct nfs4_filelayout *
 76 FILELAYOUT_FROM_HDR(struct pnfs_layout_hdr *lo)
 77 {
 78         return container_of(lo, struct nfs4_filelayout, generic_hdr);
 79 }
 80 
 81 static inline struct nfs4_filelayout_segment *
 82 FILELAYOUT_LSEG(struct pnfs_layout_segment *lseg)
 83 {
 84         return container_of(lseg,
 85                             struct nfs4_filelayout_segment,
 86                             generic_hdr);
 87 }
 88 
 89 static inline struct nfs4_deviceid_node *
 90 FILELAYOUT_DEVID_NODE(struct pnfs_layout_segment *lseg)
 91 {
 92         return &FILELAYOUT_LSEG(lseg)->dsaddr->id_node;
 93 }
 94 
 95 static inline bool
 96 filelayout_test_devid_invalid(struct nfs4_deviceid_node *node)
 97 {
 98         return test_bit(NFS_DEVICEID_INVALID, &node->flags);
 99 }
100 
101 extern bool
102 filelayout_test_devid_unavailable(struct nfs4_deviceid_node *node);
103 
104 extern struct nfs_fh *
105 nfs4_fl_select_ds_fh(struct pnfs_layout_segment *lseg, u32 j);
106 
107 u32 nfs4_fl_calc_j_index(struct pnfs_layout_segment *lseg, loff_t offset);
108 u32 nfs4_fl_calc_ds_index(struct pnfs_layout_segment *lseg, u32 j);
109 struct nfs4_pnfs_ds *nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg,
110                                         u32 ds_idx);
111 
112 extern struct nfs4_file_layout_dsaddr *
113 nfs4_fl_alloc_deviceid_node(struct nfs_server *server,
114         struct pnfs_device *pdev, gfp_t gfp_flags);
115 extern void nfs4_fl_put_deviceid(struct nfs4_file_layout_dsaddr *dsaddr);
116 extern void nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr);
117 
118 #endif /* FS_NFS_NFS4FILELAYOUT_H */
119 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp