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#define NFS_CS_MIGRATION 2 /* - transparent state migr */
43 struct sockaddr_storage cl_addr; /* server identifier */
44 size_t cl_addrlen;
45 char * cl_hostname; /* hostname of server */
46 struct list_head cl_share_link; /* link in global client list */
47 struct list_head cl_superblocks; /* List of nfs_server structs */
48
49 struct rpc_clnt * cl_rpcclient;
50 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */
51 int cl_proto; /* Network transport protocol */
52 struct nfs_subversion * cl_nfs_mod; /* pointer to nfs version module */
53
54 u32 cl_minorversion;/* NFSv4 minorversion */
55 struct rpc_cred *cl_machine_cred;
56
57#if IS_ENABLED(CONFIG_NFS_V4)
58 u64 cl_clientid; /* constant */
59 nfs4_verifier cl_confirm; /* Clientid verifier */
60 unsigned long cl_state;
61
62 spinlock_t cl_lock;
63
64 unsigned long cl_lease_time;
65 unsigned long cl_last_renewal;
66 struct delayed_work cl_renewd;
67
68 struct rpc_wait_queue cl_rpcwaitq;
69
70 /* idmapper */
71 struct idmap * cl_idmap;
72
73 /* Our own IP address, as a null-terminated string.
74 * This is used to generate the mv0 callback address.
75 */
76 char cl_ipaddr[48];
77 u32 cl_cb_ident; /* v4.0 callback identifier */
78 const struct nfs4_minor_version_ops *cl_mvops;
79
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; /* shared session */
85 bool cl_preserve_clid;
86 struct nfs41_server_owner *cl_serverowner;
87 struct nfs41_server_scope *cl_serverscope;
88 struct nfs41_impl_id *cl_implid;
89#endif /* CONFIG_NFS_V4 */
90
91#ifdef CONFIG_NFS_FSCACHE
92 struct fscache_cookie *fscache; /* client index cache cookie */
93#endif
94
95 struct net *cl_net;
96};
97
98/*
99 * NFS client parameters stored in the superblock.
100 */
101struct nfs_server {
102 struct nfs_client * nfs_client; /* shared client and NFS4 state */
103 struct list_head client_link; /* List of other nfs_server structs
104 * that share the same client
105 */
106 struct list_head master_link; /* link in master servers list */
107 struct rpc_clnt * client; /* RPC client handle */
108 struct rpc_clnt * client_acl; /* ACL RPC client handle */
109 struct nlm_host *nlm_host; /* NLM client handle */
110 struct nfs_iostats __percpu *io_stats; /* I/O statistics */
111 struct backing_dev_info backing_dev_info;
112 atomic_long_t writeback; /* number of writeback pages */
113 int flags; /* various flags */
114 unsigned int caps; /* server capabilities */
115 unsigned int rsize; /* read size */
116 unsigned int rpages; /* read size (in pages) */
117 unsigned int wsize; /* write size */
118 unsigned int wpages; /* write size (in pages) */
119 unsigned int wtmult; /* server disk block size */
120 unsigned int dtsize; /* readdir size */
121 unsigned short port; /* "port=" setting */
122 unsigned int bsize; /* server block size */
123 unsigned int acregmin; /* attr cache timeouts */
124 unsigned int acregmax;
125 unsigned int acdirmin;
126 unsigned int acdirmax;
127 unsigned int namelen;
128 unsigned int options; /* extra options enabled by mount */
129#define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */
130#define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */
131
132 struct nfs_fsid fsid;
133 __u64 maxfilesize; /* maximum file size */
134 struct timespec time_delta; /* smallest time granularity */
135 unsigned long mount_time; /* when this fs was mounted */
136 dev_t s_dev; /* superblock dev numbers */
137
138#ifdef CONFIG_NFS_FSCACHE
139 struct nfs_fscache_key *fscache_key; /* unique key for superblock */
140 struct fscache_cookie *fscache; /* superblock cookie */
141#endif
142
143 u32 pnfs_blksize; /* layout_blksize attr */
144#if IS_ENABLED(CONFIG_NFS_V4)
145 u32 attr_bitmask[3];/* V4 bitmask representing the set
146 of attributes supported on this
147 filesystem */
148 u32 cache_consistency_bitmask[2];
149 /* V4 bitmask representing the subset
150 of change attribute, size, ctime
151 and mtime attributes supported by
152 the server */
153 u32 acl_bitmask; /* V4 bitmask representing the ACEs
154 that are supported on this
155 filesystem */
156 u32 fh_expire_type; /* V4 bitmask representing file
157 handle volatility type for
158 this filesystem */
159 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */
160 struct rpc_wait_queue roc_rpcwaitq;
161 void *pnfs_ld_data; /* per mount point data */
162
163 /* the following fields are protected by nfs_client->cl_lock */
164 struct rb_root state_owners;
165#endif
166 struct ida openowner_id;
167 struct ida lockowner_id;
168 struct list_head state_owners_lru;
169 struct list_head layouts;
170 struct list_head delegations;
171 void (*destroy)(struct nfs_server *);
172
173 atomic_t active; /* Keep trace of any activity to this server */
174
175 /* mountd-related mount options */
176 struct sockaddr_storage mountd_address;
177 size_t mountd_addrlen;
178 u32 mountd_version;
179 unsigned short mountd_port;
180 unsigned short mountd_protocol;
181};
182
183/* Server capabilities */
184#define NFS_CAP_READDIRPLUS (1U << 0)
185#define NFS_CAP_HARDLINKS (1U << 1)
186#define NFS_CAP_SYMLINKS (1U << 2)
187#define NFS_CAP_ACLS (1U << 3)
188#define NFS_CAP_ATOMIC_OPEN (1U << 4)
189#define NFS_CAP_CHANGE_ATTR (1U << 5)
190#define NFS_CAP_FILEID (1U << 6)
191#define NFS_CAP_MODE (1U << 7)
192#define NFS_CAP_NLINK (1U << 8)
193#define NFS_CAP_OWNER (1U << 9)
194#define NFS_CAP_OWNER_GROUP (1U << 10)
195#define NFS_CAP_ATIME (1U << 11)
196#define NFS_CAP_CTIME (1U << 12)
197#define NFS_CAP_MTIME (1U << 13)
198#define NFS_CAP_POSIX_LOCK (1U << 14)
199#define NFS_CAP_UIDGID_NOMAP (1U << 15)
200
201#endif