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/idr.h>
7#include <linux/wait.h>
8#include <linux/nfs_xdr.h>
9#include <linux/sunrpc/xprt.h>
10
11#include <linux/atomic.h>
12
13struct nfs4_session;
14struct nfs_iostats;
15struct nlm_host;
16struct nfs4_sequence_args;
17struct nfs4_sequence_res;
18struct nfs_server;
19struct nfs4_minor_version_ops;
20struct nfs41_server_scope;
21struct nfs41_impl_id;
22
23/*
24 * The nfs_client identifies our client state to the server.
25 */
26struct nfs_client {
27 atomic_t cl_count;
28 atomic_t cl_mds_count;
29 int cl_cons_state; /* current construction state (-ve: init error) */
30#define NFS_CS_READY 0 /* ready to be used */
31#define NFS_CS_INITING 1 /* busy initialising */
32#define NFS_CS_SESSION_INITING 2 /* busy initialising session */
33 unsigned long cl_res_state; /* NFS resources state */
34#define NFS_CS_CALLBACK 1 /* - callback started */
35#define NFS_CS_IDMAP 2 /* - idmap started */
36#define NFS_CS_RENEWD 3 /* - renewd started */
37#define NFS_CS_STOP_RENEW 4 /* no more state to renew */
38#define NFS_CS_CHECK_LEASE_TIME 5 /* need to check lease time */
39 unsigned long cl_flags; /* behavior switches */
40#define NFS_CS_NORESVPORT 0 /* - use ephemeral src port */
41#define NFS_CS_DISCRTRY 1 /* - disconnect on RPC retry */
42 struct sockaddr_storage cl_addr; /* server identifier */
43 size_t cl_addrlen;
44 char * cl_hostname; /* hostname of server */
45 struct list_head cl_share_link; /* link in global client list */
46 struct list_head cl_superblocks; /* List of nfs_server structs */
47
48 struct rpc_clnt * cl_rpcclient;
49 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */
50 int cl_proto; /* Network transport protocol */
51 struct nfs_subversion * cl_nfs_mod; /* pointer to nfs version module */
52
53 u32 cl_minorversion;/* NFSv4 minorversion */
54 struct rpc_cred *cl_machine_cred;
55
56#if IS_ENABLED(CONFIG_NFS_V4)
57 u64 cl_clientid; /* constant */
58 nfs4_verifier cl_confirm; /* Clientid verifier */
59 unsigned long cl_state;
60
61 spinlock_t cl_lock;
62
63 unsigned long cl_lease_time;
64 unsigned long cl_last_renewal;
65 struct delayed_work cl_renewd;
66
67 struct rpc_wait_queue cl_rpcwaitq;
68
69 /* idmapper */
70 struct idmap * cl_idmap;
71
72 /* Our own IP address, as a null-terminated string.
73 * This is used to generate the mv0 callback address.
74 */
75 char cl_ipaddr[48];
76 u32 cl_cb_ident; /* v4.0 callback identifier */
77 const struct nfs4_minor_version_ops *cl_mvops;
78
79 /* The sequence id to use for the next CREATE_SESSION */
80 u32 cl_seqid;
81 /* The flags used for obtaining the clientid during EXCHANGE_ID */
82 u32 cl_exchange_flags;
83 struct nfs4_session *cl_session; /* shared session */
84 struct nfs41_server_owner *cl_serverowner;
85 struct nfs41_server_scope *cl_serverscope;
86 struct nfs41_impl_id *cl_implid;
87#endif /* CONFIG_NFS_V4 */
88
89#ifdef CONFIG_NFS_FSCACHE
90 struct fscache_cookie *fscache; /* client index cache cookie */
91#endif
92
93 struct net *cl_net;
94};
95
96/*
97 * NFS client parameters stored in the superblock.
98 */
99struct nfs_server {
100 struct nfs_client * nfs_client; /* shared client and NFS4 state */
101 struct list_head client_link; /* List of other nfs_server structs
102 * that share the same client
103 */
104 struct list_head master_link; /* link in master servers list */
105 struct rpc_clnt * client; /* RPC client handle */
106 struct rpc_clnt * client_acl; /* ACL RPC client handle */
107 struct nlm_host *nlm_host; /* NLM client handle */
108 struct nfs_iostats __percpu *io_stats; /* I/O statistics */
109 struct backing_dev_info backing_dev_info;
110 atomic_long_t writeback; /* number of writeback pages */
111 int flags; /* various flags */
112 unsigned int caps; /* server capabilities */
113 unsigned int rsize; /* read size */
114 unsigned int rpages; /* read size (in pages) */
115 unsigned int wsize; /* write size */
116 unsigned int wpages; /* write size (in pages) */
117 unsigned int wtmult; /* server disk block size */
118 unsigned int dtsize; /* readdir size */
119 unsigned short port; /* "port=" setting */
120 unsigned int bsize; /* server block size */
121 unsigned int acregmin; /* attr cache timeouts */
122 unsigned int acregmax;
123 unsigned int acdirmin;
124 unsigned int acdirmax;
125 unsigned int namelen;
126 unsigned int options; /* extra options enabled by mount */
127#define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */
128
129 struct nfs_fsid fsid;
130 __u64 maxfilesize; /* maximum file size */
131 struct timespec time_delta; /* smallest time granularity */
132 unsigned long mount_time; /* when this fs was mounted */
133 dev_t s_dev; /* superblock dev numbers */
134
135#ifdef CONFIG_NFS_FSCACHE
136 struct nfs_fscache_key *fscache_key; /* unique key for superblock */
137 struct fscache_cookie *fscache; /* superblock cookie */
138#endif
139
140 u32 pnfs_blksize; /* layout_blksize attr */
141#if IS_ENABLED(CONFIG_NFS_V4)
142 u32 attr_bitmask[3];/* V4 bitmask representing the set
143 of attributes supported on this
144 filesystem */
145 u32 cache_consistency_bitmask[2];
146 /* V4 bitmask representing the subset
147 of change attribute, size, ctime
148 and mtime attributes supported by
149 the server */
150 u32 acl_bitmask; /* V4 bitmask representing the ACEs
151 that are supported on this
152 filesystem */
153 u32 fh_expire_type; /* V4 bitmask representing file
154 handle volatility type for
155 this filesystem */
156 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */
157 struct rpc_wait_queue roc_rpcwaitq;
158 void *pnfs_ld_data; /* per mount point data */
159
160 /* the following fields are protected by nfs_client->cl_lock */
161 struct rb_root state_owners;
162#endif
163 struct ida openowner_id;
164 struct ida lockowner_id;
165 struct list_head state_owners_lru;
166 struct list_head layouts;
167 struct list_head delegations;
168 void (*destroy)(struct nfs_server *);
169
170 atomic_t active; /* Keep trace of any activity to this server */
171
172 /* mountd-related mount options */
173 struct sockaddr_storage mountd_address;
174 size_t mountd_addrlen;
175 u32 mountd_version;
176 unsigned short mountd_port;
177 unsigned short mountd_protocol;
178};
179
180/* Server capabilities */
181#define NFS_CAP_READDIRPLUS (1U << 0)
182#define NFS_CAP_HARDLINKS (1U << 1)
183#define NFS_CAP_SYMLINKS (1U << 2)
184#define NFS_CAP_ACLS (1U << 3)
185#define NFS_CAP_ATOMIC_OPEN (1U << 4)
186#define NFS_CAP_CHANGE_ATTR (1U << 5)
187#define NFS_CAP_FILEID (1U << 6)
188#define NFS_CAP_MODE (1U << 7)
189#define NFS_CAP_NLINK (1U << 8)
190#define NFS_CAP_OWNER (1U << 9)
191#define NFS_CAP_OWNER_GROUP (1U << 10)
192#define NFS_CAP_ATIME (1U << 11)
193#define NFS_CAP_CTIME (1U << 12)
194#define NFS_CAP_MTIME (1U << 13)
195#define NFS_CAP_POSIX_LOCK (1U << 14)
196#define NFS_CAP_UIDGID_NOMAP (1U << 15)
197
198
199/* maximum number of slots to use */
200#define NFS4_DEF_SLOT_TABLE_SIZE (16U)
201#define NFS4_MAX_SLOT_TABLE (256U)
202#define NFS4_NO_SLOT ((u32)-1)
203
204#if IS_ENABLED(CONFIG_NFS_V4)
205
206/* Sessions */
207#define SLOT_TABLE_SZ DIV_ROUND_UP(NFS4_MAX_SLOT_TABLE, 8*sizeof(long))
208struct nfs4_slot_table {
209 struct nfs4_slot *slots; /* seqid per slot */
210 unsigned long used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */
211 spinlock_t slot_tbl_lock;
212 struct rpc_wait_queue slot_tbl_waitq; /* allocators may wait here */
213 u32 max_slots; /* # slots in table */
214 u32 highest_used_slotid; /* sent to server on each SEQ.
215 * op for dynamic resizing */
216 u32 target_max_slots; /* Set by CB_RECALL_SLOT as
217 * the new max_slots */
218 struct completion complete;
219};
220
221static inline int slot_idx(struct nfs4_slot_table *tbl, struct nfs4_slot *sp)
222{
223 return sp - tbl->slots;
224}
225
226/*
227 * Session related parameters
228 */
229struct nfs4_session {
230 struct nfs4_sessionid sess_id;
231 u32 flags;
232 unsigned long session_state;
233 u32 hash_alg;
234 u32 ssv_len;
235
236 /* The fore and back channel */
237 struct nfs4_channel_attrs fc_attrs;
238 struct nfs4_slot_table fc_slot_table;
239 struct nfs4_channel_attrs bc_attrs;
240 struct nfs4_slot_table bc_slot_table;
241 struct nfs_client *clp;
242};
243
244#endif /* CONFIG_NFS_V4 */
245#endif