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 struct sockaddr_storage cl_addr; /* server identifier */
34 size_t cl_addrlen;
35 char * cl_hostname; /* hostname of server */
36 struct list_head cl_share_link; /* link in global client list */
37 struct list_head cl_superblocks; /* List of nfs_server structs */
38
39 struct rpc_clnt * cl_rpcclient;
40 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */
41 int cl_proto; /* Network transport protocol */
42
43 u32 cl_minorversion;/* NFSv4 minorversion */
44 struct rpc_cred *cl_machine_cred;
45
46#ifdef CONFIG_NFS_V4
47 u64 cl_clientid; /* constant */
48 unsigned long cl_state;
49
50 spinlock_t cl_lock;
51
52 unsigned long cl_lease_time;
53 unsigned long cl_last_renewal;
54 struct delayed_work cl_renewd;
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[48];
68 unsigned char cl_id_uniquifier;
69 u32 cl_cb_ident; /* v4.0 callback identifier */
70 const struct nfs4_minor_version_ops *cl_mvops;
71#endif /* CONFIG_NFS_V4 */
72
73#ifdef CONFIG_NFS_V4_1
74 /* clientid returned from EXCHANGE_ID, used by session operations */
75 u64 cl_ex_clid;
76 /* The sequence id to use for the next CREATE_SESSION */
77 u32 cl_seqid;
78 /* The flags used for obtaining the clientid during EXCHANGE_ID */
79 u32 cl_exchange_flags;
80 struct nfs4_session *cl_session; /* sharred session */
81 struct list_head cl_layouts;
82 struct pnfs_deviceid_cache *cl_devid_cache; /* pNFS deviceid cache */
83#endif /* CONFIG_NFS_V4_1 */
84
85#ifdef CONFIG_NFS_FSCACHE
86 struct fscache_cookie *fscache; /* client index cache cookie */
87#endif
88};
89
90/*
91 * NFS client parameters stored in the superblock.
92 */
93struct nfs_server {
94 struct nfs_client * nfs_client; /* shared client and NFS4 state */
95 struct list_head client_link; /* List of other nfs_server structs
96 * that share the same client
97 */
98 struct list_head master_link; /* link in master servers list */
99 struct rpc_clnt * client; /* RPC client handle */
100 struct rpc_clnt * client_acl; /* ACL RPC client handle */
101 struct nlm_host *nlm_host; /* NLM client handle */
102 struct nfs_iostats __percpu *io_stats; /* I/O statistics */
103 struct backing_dev_info backing_dev_info;
104 atomic_long_t writeback; /* number of writeback pages */
105 int flags; /* various flags */
106 unsigned int caps; /* server capabilities */
107 unsigned int rsize; /* read size */
108 unsigned int rpages; /* read size (in pages) */
109 unsigned int wsize; /* write size */
110 unsigned int wpages; /* write size (in pages) */
111 unsigned int wtmult; /* server disk block size */
112 unsigned int dtsize; /* readdir size */
113 unsigned short port; /* "port=" setting */
114 unsigned int bsize; /* server block size */
115 unsigned int acregmin; /* attr cache timeouts */
116 unsigned int acregmax;
117 unsigned int acdirmin;
118 unsigned int acdirmax;
119 unsigned int namelen;
120 unsigned int options; /* extra options enabled by mount */
121#define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */
122
123 struct nfs_fsid fsid;
124 __u64 maxfilesize; /* maximum file size */
125 struct timespec time_delta; /* smallest time granularity */
126 unsigned long mount_time; /* when this fs was mounted */
127 dev_t s_dev; /* superblock dev numbers */
128
129#ifdef CONFIG_NFS_FSCACHE
130 struct nfs_fscache_key *fscache_key; /* unique key for superblock */
131 struct fscache_cookie *fscache; /* superblock cookie */
132#endif
133
134#ifdef CONFIG_NFS_V4
135 u32 attr_bitmask[2];/* V4 bitmask representing the set
136 of attributes supported on this
137 filesystem */
138 u32 cache_consistency_bitmask[2];
139 /* V4 bitmask representing the subset
140 of change attribute, size, ctime
141 and mtime attributes supported by
142 the server */
143 u32 acl_bitmask; /* V4 bitmask representing the ACEs
144 that are supported on this
145 filesystem */
146 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */
147 struct rpc_wait_queue roc_rpcwaitq;
148
149 /* the following fields are protected by nfs_client->cl_lock */
150 struct rb_root state_owners;
151 struct rb_root openowner_id;
152 struct rb_root lockowner_id;
153#endif
154 struct list_head delegations;
155 void (*destroy)(struct nfs_server *);
156
157 atomic_t active; /* Keep trace of any activity to this server */
158
159 /* mountd-related mount options */
160 struct sockaddr_storage mountd_address;
161 size_t mountd_addrlen;
162 u32 mountd_version;
163 unsigned short mountd_port;
164 unsigned short mountd_protocol;
165};
166
167/* Server capabilities */
168#define NFS_CAP_READDIRPLUS (1U << 0)
169#define NFS_CAP_HARDLINKS (1U << 1)
170#define NFS_CAP_SYMLINKS (1U << 2)
171#define NFS_CAP_ACLS (1U << 3)
172#define NFS_CAP_ATOMIC_OPEN (1U << 4)
173#define NFS_CAP_CHANGE_ATTR (1U << 5)
174#define NFS_CAP_FILEID (1U << 6)
175#define NFS_CAP_MODE (1U << 7)
176#define NFS_CAP_NLINK (1U << 8)
177#define NFS_CAP_OWNER (1U << 9)
178#define NFS_CAP_OWNER_GROUP (1U << 10)
179#define NFS_CAP_ATIME (1U << 11)
180#define NFS_CAP_CTIME (1U << 12)
181#define NFS_CAP_MTIME (1U << 13)
182#define NFS_CAP_POSIX_LOCK (1U << 14)
183
184
185/* maximum number of slots to use */
186#define NFS4_MAX_SLOT_TABLE RPC_MAX_SLOT_TABLE
187
188#if defined(CONFIG_NFS_V4_1)
189
190/* Sessions */
191#define SLOT_TABLE_SZ (NFS4_MAX_SLOT_TABLE/(8*sizeof(long)))
192struct nfs4_slot_table {
193 struct nfs4_slot *slots; /* seqid per slot */
194 unsigned long used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */
195 spinlock_t slot_tbl_lock;
196 struct rpc_wait_queue slot_tbl_waitq; /* allocators may wait here */
197 int max_slots; /* # slots in table */
198 int highest_used_slotid; /* sent to server on each SEQ.
199 * op for dynamic resizing */
200 int target_max_slots; /* Set by CB_RECALL_SLOT as
201 * the new max_slots */
202 struct completion complete;
203};
204
205static inline int slot_idx(struct nfs4_slot_table *tbl, struct nfs4_slot *sp)
206{
207 return sp - tbl->slots;
208}
209
210/*
211 * Session related parameters
212 */
213struct nfs4_session {
214 struct nfs4_sessionid sess_id;
215 u32 flags;
216 unsigned long session_state;
217 u32 hash_alg;
218 u32 ssv_len;
219
220 /* The fore and back channel */
221 struct nfs4_channel_attrs fc_attrs;
222 struct nfs4_slot_table fc_slot_table;
223 struct nfs4_channel_attrs bc_attrs;
224 struct nfs4_slot_table bc_slot_table;
225 struct nfs_client *clp;
226};
227
228#endif /* CONFIG_NFS_V4_1 */
229#endif