tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _NFS_FS_SB
2#define _NFS_FS_SB
3
4#include <linux/list.h>
5#include <linux/backing-dev.h>
6#include <linux/wait.h>
7
8#include <asm/atomic.h>
9
10struct nfs_iostats;
11struct nlm_host;
12
13/*
14 * The nfs_client identifies our client state to the server.
15 */
16struct nfs_client {
17 atomic_t cl_count;
18 int cl_cons_state; /* current construction state (-ve: init error) */
19#define NFS_CS_READY 0 /* ready to be used */
20#define NFS_CS_INITING 1 /* busy initialising */
21 unsigned long cl_res_state; /* NFS resources state */
22#define NFS_CS_CALLBACK 1 /* - callback started */
23#define NFS_CS_IDMAP 2 /* - idmap started */
24#define NFS_CS_RENEWD 3 /* - renewd started */
25 struct sockaddr_storage cl_addr; /* server identifier */
26 size_t cl_addrlen;
27 char * cl_hostname; /* hostname of server */
28 struct list_head cl_share_link; /* link in global client list */
29 struct list_head cl_superblocks; /* List of nfs_server structs */
30
31 struct rpc_clnt * cl_rpcclient;
32 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */
33 int cl_proto; /* Network transport protocol */
34
35#ifdef CONFIG_NFS_V4
36 u64 cl_clientid; /* constant */
37 nfs4_verifier cl_confirm;
38 unsigned long cl_state;
39
40 struct rb_root cl_openowner_id;
41 struct rb_root cl_lockowner_id;
42
43 /*
44 * The following rwsem ensures exclusive access to the server
45 * while we recover the state following a lease expiration.
46 */
47 struct rw_semaphore cl_sem;
48
49 struct list_head cl_delegations;
50 struct rb_root cl_state_owners;
51 spinlock_t cl_lock;
52
53 unsigned long cl_lease_time;
54 unsigned long cl_last_renewal;
55 struct delayed_work cl_renewd;
56
57 struct rpc_wait_queue cl_rpcwaitq;
58
59 /* used for the setclientid verifier */
60 struct timespec cl_boot_time;
61
62 /* idmapper */
63 struct idmap * cl_idmap;
64
65 /* Our own IP address, as a null-terminated string.
66 * This is used to generate the clientid, and the callback address.
67 */
68 char cl_ipaddr[48];
69 unsigned char cl_id_uniquifier;
70#endif
71};
72
73/*
74 * NFS client parameters stored in the superblock.
75 */
76struct nfs_server {
77 struct nfs_client * nfs_client; /* shared client and NFS4 state */
78 struct list_head client_link; /* List of other nfs_server structs
79 * that share the same client
80 */
81 struct list_head master_link; /* link in master servers list */
82 struct rpc_clnt * client; /* RPC client handle */
83 struct rpc_clnt * client_acl; /* ACL RPC client handle */
84 struct nlm_host *nlm_host; /* NLM client handle */
85 struct nfs_iostats * io_stats; /* I/O statistics */
86 struct backing_dev_info backing_dev_info;
87 atomic_long_t writeback; /* number of writeback pages */
88 int flags; /* various flags */
89 unsigned int caps; /* server capabilities */
90 unsigned int rsize; /* read size */
91 unsigned int rpages; /* read size (in pages) */
92 unsigned int wsize; /* write size */
93 unsigned int wpages; /* write size (in pages) */
94 unsigned int wtmult; /* server disk block size */
95 unsigned int dtsize; /* readdir size */
96 unsigned int bsize; /* server block size */
97 unsigned int acregmin; /* attr cache timeouts */
98 unsigned int acregmax;
99 unsigned int acdirmin;
100 unsigned int acdirmax;
101 unsigned int namelen;
102
103 struct nfs_fsid fsid;
104 __u64 maxfilesize; /* maximum file size */
105 unsigned long mount_time; /* when this fs was mounted */
106 dev_t s_dev; /* superblock dev numbers */
107
108#ifdef CONFIG_NFS_V4
109 u32 attr_bitmask[2];/* V4 bitmask representing the set
110 of attributes supported on this
111 filesystem */
112 u32 acl_bitmask; /* V4 bitmask representing the ACEs
113 that are supported on this
114 filesystem */
115#endif
116 void (*destroy)(struct nfs_server *);
117
118 atomic_t active; /* Keep trace of any activity to this server */
119 wait_queue_head_t active_wq; /* Wait for any activity to stop */
120};
121
122/* Server capabilities */
123#define NFS_CAP_READDIRPLUS (1U << 0)
124#define NFS_CAP_HARDLINKS (1U << 1)
125#define NFS_CAP_SYMLINKS (1U << 2)
126#define NFS_CAP_ACLS (1U << 3)
127#define NFS_CAP_ATOMIC_OPEN (1U << 4)
128
129#endif