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[PATCH] nfs: fix congestion control
[mirror_ubuntu-bionic-kernel.git] / include / linux / nfs_fs_sb.h
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1da177e4
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1#ifndef _NFS_FS_SB
2#define _NFS_FS_SB
3
4#include <linux/list.h>
5#include <linux/backing-dev.h>
6
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7struct nfs_iostats;
8
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9/*
10 * The nfs_client identifies our client state to the server.
11 */
12struct nfs_client {
13 atomic_t cl_count;
14 int cl_cons_state; /* current construction state (-ve: init error) */
15#define NFS_CS_READY 0 /* ready to be used */
16#define NFS_CS_INITING 1 /* busy initialising */
17 int cl_nfsversion; /* NFS protocol version */
18 unsigned long cl_res_state; /* NFS resources state */
19#define NFS_CS_RPCIOD 0 /* - rpciod started */
20#define NFS_CS_CALLBACK 1 /* - callback started */
21#define NFS_CS_IDMAP 2 /* - idmap started */
5dd3177a 22#define NFS_CS_RENEWD 3 /* - renewd started */
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23 struct sockaddr_in cl_addr; /* server identifier */
24 char * cl_hostname; /* hostname of server */
25 struct list_head cl_share_link; /* link in global client list */
26 struct list_head cl_superblocks; /* List of nfs_server structs */
27
28 struct rpc_clnt * cl_rpcclient;
8fa5c000 29 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */
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30 unsigned long retrans_timeo; /* retransmit timeout */
31 unsigned int retrans_count; /* number of retransmit tries */
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32
33#ifdef CONFIG_NFS_V4
34 u64 cl_clientid; /* constant */
35 nfs4_verifier cl_confirm;
36 unsigned long cl_state;
37
38 u32 cl_lockowner_id;
39
40 /*
41 * The following rwsem ensures exclusive access to the server
42 * while we recover the state following a lease expiration.
43 */
44 struct rw_semaphore cl_sem;
45
46 struct list_head cl_delegations;
47 struct list_head cl_state_owners;
48 struct list_head cl_unused;
49 int cl_nunused;
50 spinlock_t cl_lock;
51
52 unsigned long cl_lease_time;
53 unsigned long cl_last_renewal;
52bad64d 54 struct delayed_work cl_renewd;
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55
56 struct rpc_wait_queue cl_rpcwaitq;
57
58 /* used for the setclientid verifier */
59 struct timespec cl_boot_time;
60
61 /* idmapper */
62 struct idmap * cl_idmap;
63
64 /* Our own IP address, as a null-terminated string.
65 * This is used to generate the clientid, and the callback address.
66 */
67 char cl_ipaddr[16];
68 unsigned char cl_id_uniquifier;
69#endif
70};
71
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72/*
73 * NFS client parameters stored in the superblock.
74 */
75struct nfs_server {
27951bd2 76 struct nfs_client * nfs_client; /* shared client and NFS4 state */
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77 struct list_head client_link; /* List of other nfs_server structs
78 * that share the same client
79 */
80 struct list_head master_link; /* link in master servers list */
1da177e4 81 struct rpc_clnt * client; /* RPC client handle */
b7fa0554 82 struct rpc_clnt * client_acl; /* ACL RPC client handle */
d9ef5a8c 83 struct nfs_iostats * io_stats; /* I/O statistics */
1da177e4 84 struct backing_dev_info backing_dev_info;
89a09141 85 atomic_t writeback; /* number of writeback pages */
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86 int flags; /* various flags */
87 unsigned int caps; /* server capabilities */
88 unsigned int rsize; /* read size */
89 unsigned int rpages; /* read size (in pages) */
90 unsigned int wsize; /* write size */
91 unsigned int wpages; /* write size (in pages) */
92 unsigned int wtmult; /* server disk block size */
93 unsigned int dtsize; /* readdir size */
94 unsigned int bsize; /* server block size */
95 unsigned int acregmin; /* attr cache timeouts */
96 unsigned int acregmax;
97 unsigned int acdirmin;
98 unsigned int acdirmax;
99 unsigned int namelen;
54ceac45 100
8b4bdcf8 101 struct nfs_fsid fsid;
54ceac45 102 __u64 maxfilesize; /* maximum file size */
67ec9f46 103 unsigned long mount_time; /* when this fs was mounted */
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104 dev_t s_dev; /* superblock dev numbers */
105
1da177e4 106#ifdef CONFIG_NFS_V4
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107 u32 attr_bitmask[2];/* V4 bitmask representing the set
108 of attributes supported on this
109 filesystem */
110 u32 acl_bitmask; /* V4 bitmask representing the ACEs
111 that are supported on this
112 filesystem */
113#endif
54ceac45 114 void (*destroy)(struct nfs_server *);
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115};
116
117/* Server capabilities */
118#define NFS_CAP_READDIRPLUS (1U << 0)
119#define NFS_CAP_HARDLINKS (1U << 1)
120#define NFS_CAP_SYMLINKS (1U << 2)
121#define NFS_CAP_ACLS (1U << 3)
122#define NFS_CAP_ATOMIC_OPEN (1U << 4)
123
124#endif