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 struct rpc_cred *cl_machine_cred;
36
37#ifdef CONFIG_NFS_V4
38 u64 cl_clientid; /* constant */
39 nfs4_verifier cl_confirm;
40 unsigned long cl_state;
41
42 struct rb_root cl_openowner_id;
43 struct rb_root cl_lockowner_id;
44
45 /*
46 * The following rwsem ensures exclusive access to the server
47 * while we recover the state following a lease expiration.
48 */
49 struct rw_semaphore cl_sem;
50
51 struct list_head cl_delegations;
52 struct rb_root cl_state_owners;
53 spinlock_t cl_lock;
54
55 unsigned long cl_lease_time;
56 unsigned long cl_last_renewal;
57 struct delayed_work cl_renewd;
58
59 struct rpc_wait_queue cl_rpcwaitq;
60
61 /* used for the setclientid verifier */
62 struct timespec cl_boot_time;
63
64 /* idmapper */
65 struct idmap * cl_idmap;
66
67 /* Our own IP address, as a null-terminated string.
68 * This is used to generate the clientid, and the callback address.
69 */
70 char cl_ipaddr[48];
71 unsigned char cl_id_uniquifier;
72#endif
73};
74
75/*
76 * NFS client parameters stored in the superblock.
77 */
78struct nfs_server {
79 struct nfs_client * nfs_client; /* shared client and NFS4 state */
80 struct list_head client_link; /* List of other nfs_server structs
81 * that share the same client
82 */
83 struct list_head master_link; /* link in master servers list */
84 struct rpc_clnt * client; /* RPC client handle */
85 struct rpc_clnt * client_acl; /* ACL RPC client handle */
86 struct nlm_host *nlm_host; /* NLM client handle */
87 struct nfs_iostats * io_stats; /* I/O statistics */
88 struct backing_dev_info backing_dev_info;
89 atomic_long_t writeback; /* number of writeback pages */
90 int flags; /* various flags */
91 unsigned int caps; /* server capabilities */
92 unsigned int rsize; /* read size */
93 unsigned int rpages; /* read size (in pages) */
94 unsigned int wsize; /* write size */
95 unsigned int wpages; /* write size (in pages) */
96 unsigned int wtmult; /* server disk block size */
97 unsigned int dtsize; /* readdir size */
98 unsigned short port; /* "port=" setting */
99 unsigned int bsize; /* server block size */
100 unsigned int acregmin; /* attr cache timeouts */
101 unsigned int acregmax;
102 unsigned int acdirmin;
103 unsigned int acdirmax;
104 unsigned int namelen;
105
106 struct nfs_fsid fsid;
107 __u64 maxfilesize; /* maximum file size */
108 unsigned long mount_time; /* when this fs was mounted */
109 dev_t s_dev; /* superblock dev numbers */
110
111#ifdef CONFIG_NFS_V4
112 u32 attr_bitmask[2];/* V4 bitmask representing the set
113 of attributes supported on this
114 filesystem */
115 u32 acl_bitmask; /* V4 bitmask representing the ACEs
116 that are supported on this
117 filesystem */
118#endif
119 void (*destroy)(struct nfs_server *);
120
121 atomic_t active; /* Keep trace of any activity to this server */
122
123 /* mountd-related mount options */
124 struct sockaddr_storage mountd_address;
125 size_t mountd_addrlen;
126 u32 mountd_version;
127 unsigned short mountd_port;
128 unsigned short mountd_protocol;
129};
130
131/* Server capabilities */
132#define NFS_CAP_READDIRPLUS (1U << 0)
133#define NFS_CAP_HARDLINKS (1U << 1)
134#define NFS_CAP_SYMLINKS (1U << 2)
135#define NFS_CAP_ACLS (1U << 3)
136#define NFS_CAP_ATOMIC_OPEN (1U << 4)
137
138#endif