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 struct rb_root cl_openowner_id;
51 struct rb_root cl_lockowner_id;
52
53 struct list_head cl_delegations;
54 struct rb_root cl_state_owners;
55 spinlock_t cl_lock;
56
57 unsigned long cl_lease_time;
58 unsigned long cl_last_renewal;
59 struct delayed_work cl_renewd;
60
61 struct rpc_wait_queue cl_rpcwaitq;
62
63 /* used for the setclientid verifier */
64 struct timespec cl_boot_time;
65
66 /* idmapper */
67 struct idmap * cl_idmap;
68
69 /* Our own IP address, as a null-terminated string.
70 * This is used to generate the clientid, and the callback address.
71 */
72 char cl_ipaddr[48];
73 unsigned char cl_id_uniquifier;
74 const struct nfs4_minor_version_ops *cl_mvops;
75#endif /* CONFIG_NFS_V4 */
76
77#ifdef CONFIG_NFS_V4_1
78 /* clientid returned from EXCHANGE_ID, used by session operations */
79 u64 cl_ex_clid;
80 /* The sequence id to use for the next CREATE_SESSION */
81 u32 cl_seqid;
82 /* The flags used for obtaining the clientid during EXCHANGE_ID */
83 u32 cl_exchange_flags;
84 struct nfs4_session *cl_session; /* sharred session */
85 struct list_head cl_layouts;
86 struct pnfs_deviceid_cache *cl_devid_cache; /* pNFS deviceid cache */
87#endif /* CONFIG_NFS_V4_1 */
88
89#ifdef CONFIG_NFS_FSCACHE
90 struct fscache_cookie *fscache; /* client index cache cookie */
91#endif
92};
93
94/*
95 * NFS client parameters stored in the superblock.
96 */
97struct nfs_server {
98 struct nfs_client * nfs_client; /* shared client and NFS4 state */
99 struct list_head client_link; /* List of other nfs_server structs
100 * that share the same client
101 */
102 struct list_head master_link; /* link in master servers list */
103 struct rpc_clnt * client; /* RPC client handle */
104 struct rpc_clnt * client_acl; /* ACL RPC client handle */
105 struct nlm_host *nlm_host; /* NLM client handle */
106 struct nfs_iostats __percpu *io_stats; /* I/O statistics */
107 struct backing_dev_info backing_dev_info;
108 atomic_long_t writeback; /* number of writeback pages */
109 int flags; /* various flags */
110 unsigned int caps; /* server capabilities */
111 unsigned int rsize; /* read size */
112 unsigned int rpages; /* read size (in pages) */
113 unsigned int wsize; /* write size */
114 unsigned int wpages; /* write size (in pages) */
115 unsigned int wtmult; /* server disk block size */
116 unsigned int dtsize; /* readdir size */
117 unsigned short port; /* "port=" setting */
118 unsigned int bsize; /* server block size */
119 unsigned int acregmin; /* attr cache timeouts */
120 unsigned int acregmax;
121 unsigned int acdirmin;
122 unsigned int acdirmax;
123 unsigned int namelen;
124 unsigned int options; /* extra options enabled by mount */
125#define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */
126
127 struct nfs_fsid fsid;
128 __u64 maxfilesize; /* maximum file size */
129 struct timespec time_delta; /* smallest time granularity */
130 unsigned long mount_time; /* when this fs was mounted */
131 dev_t s_dev; /* superblock dev numbers */
132
133#ifdef CONFIG_NFS_FSCACHE
134 struct nfs_fscache_key *fscache_key; /* unique key for superblock */
135 struct fscache_cookie *fscache; /* superblock cookie */
136#endif
137
138#ifdef CONFIG_NFS_V4
139 u32 attr_bitmask[2];/* V4 bitmask representing the set
140 of attributes supported on this
141 filesystem */
142 u32 cache_consistency_bitmask[2];
143 /* V4 bitmask representing the subset
144 of change attribute, size, ctime
145 and mtime attributes supported by
146 the server */
147 u32 acl_bitmask; /* V4 bitmask representing the ACEs
148 that are supported on this
149 filesystem */
150 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */
151#endif
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
181
182/* maximum number of slots to use */
183#define NFS4_MAX_SLOT_TABLE RPC_MAX_SLOT_TABLE
184
185#if defined(CONFIG_NFS_V4_1)
186
187/* Sessions */
188#define SLOT_TABLE_SZ (NFS4_MAX_SLOT_TABLE/(8*sizeof(long)))
189struct nfs4_slot_table {
190 struct nfs4_slot *slots; /* seqid per slot */
191 unsigned long used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */
192 spinlock_t slot_tbl_lock;
193 struct rpc_wait_queue slot_tbl_waitq; /* allocators may wait here */
194 int max_slots; /* # slots in table */
195 int highest_used_slotid; /* sent to server on each SEQ.
196 * op for dynamic resizing */
197 int target_max_slots; /* Set by CB_RECALL_SLOT as
198 * the new max_slots */
199};
200
201static inline int slot_idx(struct nfs4_slot_table *tbl, struct nfs4_slot *sp)
202{
203 return sp - tbl->slots;
204}
205
206/*
207 * Session related parameters
208 */
209struct nfs4_session {
210 struct nfs4_sessionid sess_id;
211 u32 flags;
212 unsigned long session_state;
213 u32 hash_alg;
214 u32 ssv_len;
215 struct completion complete;
216
217 /* The fore and back channel */
218 struct nfs4_channel_attrs fc_attrs;
219 struct nfs4_slot_table fc_slot_table;
220 struct nfs4_channel_attrs bc_attrs;
221 struct nfs4_slot_table bc_slot_table;
222 struct nfs_client *clp;
223};
224
225#endif /* CONFIG_NFS_V4_1 */
226#endif