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#include <linux/nfs_xdr.h>
8#include <linux/sunrpc/xprt.h>
9
10#include <asm/atomic.h>
11
12struct nfs4_session;
13struct nfs_iostats;
14struct nlm_host;
15struct nfs4_sequence_args;
16struct nfs4_sequence_res;
17struct nfs_server;
18struct nfs4_minor_version_ops;
19
20/*
21 * The nfs_client identifies our client state to the server.
22 */
23struct nfs_client {
24 atomic_t cl_count;
25 int cl_cons_state; /* current construction state (-ve: init error) */
26#define NFS_CS_READY 0 /* ready to be used */
27#define NFS_CS_INITING 1 /* busy initialising */
28#define NFS_CS_SESSION_INITING 2 /* busy initialising session */
29 unsigned long cl_res_state; /* NFS resources state */
30#define NFS_CS_CALLBACK 1 /* - callback started */
31#define NFS_CS_IDMAP 2 /* - idmap started */
32#define NFS_CS_RENEWD 3 /* - renewd started */
33#define NFS_CS_STOP_RENEW 4 /* no more state to renew */
34#define NFS_CS_CHECK_LEASE_TIME 5 /* need to check lease time */
35 struct sockaddr_storage cl_addr; /* server identifier */
36 size_t cl_addrlen;
37 char * cl_hostname; /* hostname of server */
38 struct list_head cl_share_link; /* link in global client list */
39 struct list_head cl_superblocks; /* List of nfs_server structs */
40
41 struct rpc_clnt * cl_rpcclient;
42 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */
43 int cl_proto; /* Network transport protocol */
44
45 u32 cl_minorversion;/* NFSv4 minorversion */
46 struct rpc_cred *cl_machine_cred;
47
48#ifdef CONFIG_NFS_V4
49 u64 cl_clientid; /* constant */
50 unsigned long cl_state;
51
52 spinlock_t cl_lock;
53
54 unsigned long cl_lease_time;
55 unsigned long cl_last_renewal;
56 struct delayed_work cl_renewd;
57
58 struct rpc_wait_queue cl_rpcwaitq;
59
60 /* used for the setclientid verifier */
61 struct timespec cl_boot_time;
62
63 /* idmapper */
64 struct idmap * cl_idmap;
65
66 /* Our own IP address, as a null-terminated string.
67 * This is used to generate the clientid, and the callback address.
68 */
69 char cl_ipaddr[48];
70 unsigned char cl_id_uniquifier;
71 u32 cl_cb_ident; /* v4.0 callback identifier */
72 const struct nfs4_minor_version_ops *cl_mvops;
73
74 /* The sequence id to use for the next CREATE_SESSION */
75 u32 cl_seqid;
76 /* The flags used for obtaining the clientid during EXCHANGE_ID */
77 u32 cl_exchange_flags;
78 struct nfs4_session *cl_session; /* sharred session */
79 struct list_head cl_layouts;
80#endif /* CONFIG_NFS_V4 */
81
82#ifdef CONFIG_NFS_FSCACHE
83 struct fscache_cookie *fscache; /* client index cache cookie */
84#endif
85};
86
87/*
88 * NFS client parameters stored in the superblock.
89 */
90struct nfs_server {
91 struct nfs_client * nfs_client; /* shared client and NFS4 state */
92 struct list_head client_link; /* List of other nfs_server structs
93 * that share the same client
94 */
95 struct list_head master_link; /* link in master servers list */
96 struct rpc_clnt * client; /* RPC client handle */
97 struct rpc_clnt * client_acl; /* ACL RPC client handle */
98 struct nlm_host *nlm_host; /* NLM client handle */
99 struct nfs_iostats __percpu *io_stats; /* I/O statistics */
100 struct backing_dev_info backing_dev_info;
101 atomic_long_t writeback; /* number of writeback pages */
102 int flags; /* various flags */
103 unsigned int caps; /* server capabilities */
104 unsigned int rsize; /* read size */
105 unsigned int rpages; /* read size (in pages) */
106 unsigned int wsize; /* write size */
107 unsigned int wpages; /* write size (in pages) */
108 unsigned int wtmult; /* server disk block size */
109 unsigned int dtsize; /* readdir size */
110 unsigned short port; /* "port=" setting */
111 unsigned int bsize; /* server block size */
112 unsigned int acregmin; /* attr cache timeouts */
113 unsigned int acregmax;
114 unsigned int acdirmin;
115 unsigned int acdirmax;
116 unsigned int namelen;
117 unsigned int options; /* extra options enabled by mount */
118#define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */
119
120 struct nfs_fsid fsid;
121 __u64 maxfilesize; /* maximum file size */
122 struct timespec time_delta; /* smallest time granularity */
123 unsigned long mount_time; /* when this fs was mounted */
124 dev_t s_dev; /* superblock dev numbers */
125
126#ifdef CONFIG_NFS_FSCACHE
127 struct nfs_fscache_key *fscache_key; /* unique key for superblock */
128 struct fscache_cookie *fscache; /* superblock cookie */
129#endif
130
131#ifdef CONFIG_NFS_V4
132 u32 attr_bitmask[2];/* V4 bitmask representing the set
133 of attributes supported on this
134 filesystem */
135 u32 cache_consistency_bitmask[2];
136 /* V4 bitmask representing the subset
137 of change attribute, size, ctime
138 and mtime attributes supported by
139 the server */
140 u32 acl_bitmask; /* V4 bitmask representing the ACEs
141 that are supported on this
142 filesystem */
143 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */
144 struct rpc_wait_queue roc_rpcwaitq;
145
146 /* the following fields are protected by nfs_client->cl_lock */
147 struct rb_root state_owners;
148 struct rb_root openowner_id;
149 struct rb_root lockowner_id;
150#endif
151 struct list_head delegations;
152 void (*destroy)(struct nfs_server *);
153
154 atomic_t active; /* Keep trace of any activity to this server */
155
156 /* mountd-related mount options */
157 struct sockaddr_storage mountd_address;
158 size_t mountd_addrlen;
159 u32 mountd_version;
160 unsigned short mountd_port;
161 unsigned short mountd_protocol;
162};
163
164/* Server capabilities */
165#define NFS_CAP_READDIRPLUS (1U << 0)
166#define NFS_CAP_HARDLINKS (1U << 1)
167#define NFS_CAP_SYMLINKS (1U << 2)
168#define NFS_CAP_ACLS (1U << 3)
169#define NFS_CAP_ATOMIC_OPEN (1U << 4)
170#define NFS_CAP_CHANGE_ATTR (1U << 5)
171#define NFS_CAP_FILEID (1U << 6)
172#define NFS_CAP_MODE (1U << 7)
173#define NFS_CAP_NLINK (1U << 8)
174#define NFS_CAP_OWNER (1U << 9)
175#define NFS_CAP_OWNER_GROUP (1U << 10)
176#define NFS_CAP_ATIME (1U << 11)
177#define NFS_CAP_CTIME (1U << 12)
178#define NFS_CAP_MTIME (1U << 13)
179#define NFS_CAP_POSIX_LOCK (1U << 14)
180#define NFS_CAP_UIDGID_NOMAP (1U << 15)
181
182
183/* maximum number of slots to use */
184#define NFS4_MAX_SLOT_TABLE RPC_MAX_SLOT_TABLE
185
186#if defined(CONFIG_NFS_V4)
187
188/* Sessions */
189#define SLOT_TABLE_SZ (NFS4_MAX_SLOT_TABLE/(8*sizeof(long)))
190struct nfs4_slot_table {
191 struct nfs4_slot *slots; /* seqid per slot */
192 unsigned long used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */
193 spinlock_t slot_tbl_lock;
194 struct rpc_wait_queue slot_tbl_waitq; /* allocators may wait here */
195 int max_slots; /* # slots in table */
196 int highest_used_slotid; /* sent to server on each SEQ.
197 * op for dynamic resizing */
198 int target_max_slots; /* Set by CB_RECALL_SLOT as
199 * the new max_slots */
200 struct completion complete;
201};
202
203static inline int slot_idx(struct nfs4_slot_table *tbl, struct nfs4_slot *sp)
204{
205 return sp - tbl->slots;
206}
207
208/*
209 * Session related parameters
210 */
211struct nfs4_session {
212 struct nfs4_sessionid sess_id;
213 u32 flags;
214 unsigned long session_state;
215 u32 hash_alg;
216 u32 ssv_len;
217
218 /* The fore and back channel */
219 struct nfs4_channel_attrs fc_attrs;
220 struct nfs4_slot_table fc_slot_table;
221 struct nfs4_channel_attrs bc_attrs;
222 struct nfs4_slot_table bc_slot_table;
223 struct nfs_client *clp;
224};
225
226#endif /* CONFIG_NFS_V4 */
227#endif