nfs_fs_sb.h 3.8 KB

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  1. #ifndef _NFS_FS_SB
  2. #define _NFS_FS_SB
  3. #include <linux/list.h>
  4. #include <linux/backing-dev.h>
  5. struct nfs_iostats;
  6. /*
  7. * The nfs_client identifies our client state to the server.
  8. */
  9. struct nfs_client {
  10. atomic_t cl_count;
  11. int cl_cons_state; /* current construction state (-ve: init error) */
  12. #define NFS_CS_READY 0 /* ready to be used */
  13. #define NFS_CS_INITING 1 /* busy initialising */
  14. int cl_nfsversion; /* NFS protocol version */
  15. unsigned long cl_res_state; /* NFS resources state */
  16. #define NFS_CS_RPCIOD 0 /* - rpciod started */
  17. #define NFS_CS_CALLBACK 1 /* - callback started */
  18. #define NFS_CS_IDMAP 2 /* - idmap started */
  19. #define NFS_CS_RENEWD 3 /* - renewd started */
  20. struct sockaddr_in cl_addr; /* server identifier */
  21. char * cl_hostname; /* hostname of server */
  22. struct list_head cl_share_link; /* link in global client list */
  23. struct list_head cl_superblocks; /* List of nfs_server structs */
  24. struct rpc_clnt * cl_rpcclient;
  25. const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */
  26. unsigned long retrans_timeo; /* retransmit timeout */
  27. unsigned int retrans_count; /* number of retransmit tries */
  28. #ifdef CONFIG_NFS_V4
  29. u64 cl_clientid; /* constant */
  30. nfs4_verifier cl_confirm;
  31. unsigned long cl_state;
  32. u32 cl_lockowner_id;
  33. /*
  34. * The following rwsem ensures exclusive access to the server
  35. * while we recover the state following a lease expiration.
  36. */
  37. struct rw_semaphore cl_sem;
  38. struct list_head cl_delegations;
  39. struct list_head cl_state_owners;
  40. struct list_head cl_unused;
  41. int cl_nunused;
  42. spinlock_t cl_lock;
  43. unsigned long cl_lease_time;
  44. unsigned long cl_last_renewal;
  45. struct delayed_work cl_renewd;
  46. struct rpc_wait_queue cl_rpcwaitq;
  47. /* used for the setclientid verifier */
  48. struct timespec cl_boot_time;
  49. /* idmapper */
  50. struct idmap * cl_idmap;
  51. /* Our own IP address, as a null-terminated string.
  52. * This is used to generate the clientid, and the callback address.
  53. */
  54. char cl_ipaddr[16];
  55. unsigned char cl_id_uniquifier;
  56. #endif
  57. };
  58. /*
  59. * NFS client parameters stored in the superblock.
  60. */
  61. struct nfs_server {
  62. struct nfs_client * nfs_client; /* shared client and NFS4 state */
  63. struct list_head client_link; /* List of other nfs_server structs
  64. * that share the same client
  65. */
  66. struct list_head master_link; /* link in master servers list */
  67. struct rpc_clnt * client; /* RPC client handle */
  68. struct rpc_clnt * client_acl; /* ACL RPC client handle */
  69. struct nfs_iostats * io_stats; /* I/O statistics */
  70. struct backing_dev_info backing_dev_info;
  71. atomic_t writeback; /* number of writeback pages */
  72. int flags; /* various flags */
  73. unsigned int caps; /* server capabilities */
  74. unsigned int rsize; /* read size */
  75. unsigned int rpages; /* read size (in pages) */
  76. unsigned int wsize; /* write size */
  77. unsigned int wpages; /* write size (in pages) */
  78. unsigned int wtmult; /* server disk block size */
  79. unsigned int dtsize; /* readdir size */
  80. unsigned int bsize; /* server block size */
  81. unsigned int acregmin; /* attr cache timeouts */
  82. unsigned int acregmax;
  83. unsigned int acdirmin;
  84. unsigned int acdirmax;
  85. unsigned int namelen;
  86. struct nfs_fsid fsid;
  87. __u64 maxfilesize; /* maximum file size */
  88. unsigned long mount_time; /* when this fs was mounted */
  89. dev_t s_dev; /* superblock dev numbers */
  90. #ifdef CONFIG_NFS_V4
  91. u32 attr_bitmask[2];/* V4 bitmask representing the set
  92. of attributes supported on this
  93. filesystem */
  94. u32 acl_bitmask; /* V4 bitmask representing the ACEs
  95. that are supported on this
  96. filesystem */
  97. #endif
  98. void (*destroy)(struct nfs_server *);
  99. };
  100. /* Server capabilities */
  101. #define NFS_CAP_READDIRPLUS (1U << 0)
  102. #define NFS_CAP_HARDLINKS (1U << 1)
  103. #define NFS_CAP_SYMLINKS (1U << 2)
  104. #define NFS_CAP_ACLS (1U << 3)
  105. #define NFS_CAP_ATOMIC_OPEN (1U << 4)
  106. #endif