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#define NFS_CS_INFINITE_SLOTS 3 /* - don't limit TCP slots */
44#define NFS_CS_NO_RETRANS_TIMEOUT 4 /* - Disable retransmit timeouts */
45#define NFS_CS_TSM_POSSIBLE 5 /* - Maybe state migration */
46 struct sockaddr_storage cl_addr; /* server identifier */
47 size_t cl_addrlen;
48 char * cl_hostname; /* hostname of server */
49 char * cl_acceptor; /* GSSAPI acceptor name */
50 struct list_head cl_share_link; /* link in global client list */
51 struct list_head cl_superblocks; /* List of nfs_server structs */
52
53 struct rpc_clnt * cl_rpcclient;
54 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */
55 int cl_proto; /* Network transport protocol */
56 struct nfs_subversion * cl_nfs_mod; /* pointer to nfs version module */
57
58 u32 cl_minorversion;/* NFSv4 minorversion */
59 struct rpc_cred *cl_machine_cred;
60
61#if IS_ENABLED(CONFIG_NFS_V4)
62 struct list_head cl_ds_clients; /* auth flavor data servers */
63 u64 cl_clientid; /* constant */
64 nfs4_verifier cl_confirm; /* Clientid verifier */
65 unsigned long cl_state;
66
67 spinlock_t cl_lock;
68
69 unsigned long cl_lease_time;
70 unsigned long cl_last_renewal;
71 struct delayed_work cl_renewd;
72
73 struct rpc_wait_queue cl_rpcwaitq;
74
75 /* idmapper */
76 struct idmap * cl_idmap;
77
78 /* Client owner identifier */
79 const char * cl_owner_id;
80
81 u32 cl_cb_ident; /* v4.0 callback identifier */
82 const struct nfs4_minor_version_ops *cl_mvops;
83 unsigned long cl_mig_gen;
84
85 /* NFSv4.0 transport blocking */
86 struct nfs4_slot_table *cl_slot_tbl;
87
88 /* The sequence id to use for the next CREATE_SESSION */
89 u32 cl_seqid;
90 /* The flags used for obtaining the clientid during EXCHANGE_ID */
91 u32 cl_exchange_flags;
92 struct nfs4_session *cl_session; /* shared session */
93 bool cl_preserve_clid;
94 struct nfs41_server_owner *cl_serverowner;
95 struct nfs41_server_scope *cl_serverscope;
96 struct nfs41_impl_id *cl_implid;
97 /* nfs 4.1+ state protection modes: */
98 unsigned long cl_sp4_flags;
99#define NFS_SP4_MACH_CRED_MINIMAL 1 /* Minimal sp4_mach_cred - state ops
100 * must use machine cred */
101#define NFS_SP4_MACH_CRED_CLEANUP 2 /* CLOSE and LOCKU */
102#define NFS_SP4_MACH_CRED_SECINFO 3 /* SECINFO and SECINFO_NO_NAME */
103#define NFS_SP4_MACH_CRED_STATEID 4 /* TEST_STATEID and FREE_STATEID */
104#define NFS_SP4_MACH_CRED_WRITE 5 /* WRITE */
105#define NFS_SP4_MACH_CRED_COMMIT 6 /* COMMIT */
106#define NFS_SP4_MACH_CRED_PNFS_CLEANUP 7 /* LAYOUTRETURN */
107#if IS_ENABLED(CONFIG_NFS_V4_1)
108 wait_queue_head_t cl_lock_waitq;
109#endif /* CONFIG_NFS_V4_1 */
110#endif /* CONFIG_NFS_V4 */
111
112 /* Our own IP address, as a null-terminated string.
113 * This is used to generate the mv0 callback address.
114 */
115 char cl_ipaddr[48];
116
117#ifdef CONFIG_NFS_FSCACHE
118 struct fscache_cookie *fscache; /* client index cache cookie */
119#endif
120
121 struct net *cl_net;
122};
123
124/*
125 * NFS client parameters stored in the superblock.
126 */
127struct nfs_server {
128 struct nfs_client * nfs_client; /* shared client and NFS4 state */
129 struct list_head client_link; /* List of other nfs_server structs
130 * that share the same client
131 */
132 struct list_head master_link; /* link in master servers list */
133 struct rpc_clnt * client; /* RPC client handle */
134 struct rpc_clnt * client_acl; /* ACL RPC client handle */
135 struct nlm_host *nlm_host; /* NLM client handle */
136 struct nfs_iostats __percpu *io_stats; /* I/O statistics */
137 atomic_long_t writeback; /* number of writeback pages */
138 int flags; /* various flags */
139 unsigned int caps; /* server capabilities */
140 unsigned int rsize; /* read size */
141 unsigned int rpages; /* read size (in pages) */
142 unsigned int wsize; /* write size */
143 unsigned int wpages; /* write size (in pages) */
144 unsigned int wtmult; /* server disk block size */
145 unsigned int dtsize; /* readdir size */
146 unsigned short port; /* "port=" setting */
147 unsigned int bsize; /* server block size */
148 unsigned int acregmin; /* attr cache timeouts */
149 unsigned int acregmax;
150 unsigned int acdirmin;
151 unsigned int acdirmax;
152 unsigned int namelen;
153 unsigned int options; /* extra options enabled by mount */
154 unsigned int clone_blksize; /* granularity of a CLONE operation */
155#define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */
156#define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */
157
158 struct nfs_fsid fsid;
159 __u64 maxfilesize; /* maximum file size */
160 struct timespec time_delta; /* smallest time granularity */
161 unsigned long mount_time; /* when this fs was mounted */
162 struct super_block *super; /* VFS super block */
163 dev_t s_dev; /* superblock dev numbers */
164 struct nfs_auth_info auth_info; /* parsed auth flavors */
165
166#ifdef CONFIG_NFS_FSCACHE
167 struct nfs_fscache_key *fscache_key; /* unique key for superblock */
168 struct fscache_cookie *fscache; /* superblock cookie */
169#endif
170
171 u32 pnfs_blksize; /* layout_blksize attr */
172#if IS_ENABLED(CONFIG_NFS_V4)
173 u32 attr_bitmask[3];/* V4 bitmask representing the set
174 of attributes supported on this
175 filesystem */
176 u32 attr_bitmask_nl[3];
177 /* V4 bitmask representing the
178 set of attributes supported
179 on this filesystem excluding
180 the label support bit. */
181 u32 exclcreat_bitmask[3];
182 /* V4 bitmask representing the
183 set of attributes supported
184 on this filesystem for the
185 exclusive create. */
186 u32 cache_consistency_bitmask[3];
187 /* V4 bitmask representing the subset
188 of change attribute, size, ctime
189 and mtime attributes supported by
190 the server */
191 u32 acl_bitmask; /* V4 bitmask representing the ACEs
192 that are supported on this
193 filesystem */
194 u32 fh_expire_type; /* V4 bitmask representing file
195 handle volatility type for
196 this filesystem */
197 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */
198 struct rpc_wait_queue roc_rpcwaitq;
199 void *pnfs_ld_data; /* per mount point data */
200
201 /* the following fields are protected by nfs_client->cl_lock */
202 struct rb_root state_owners;
203#endif
204 struct ida openowner_id;
205 struct ida lockowner_id;
206 struct list_head state_owners_lru;
207 struct list_head layouts;
208 struct list_head delegations;
209
210 unsigned long mig_gen;
211 unsigned long mig_status;
212#define NFS_MIG_IN_TRANSITION (1)
213#define NFS_MIG_FAILED (2)
214#define NFS_MIG_TSM_POSSIBLE (3)
215
216 void (*destroy)(struct nfs_server *);
217
218 atomic_t active; /* Keep trace of any activity to this server */
219
220 /* mountd-related mount options */
221 struct sockaddr_storage mountd_address;
222 size_t mountd_addrlen;
223 u32 mountd_version;
224 unsigned short mountd_port;
225 unsigned short mountd_protocol;
226 struct rpc_wait_queue uoc_rpcwaitq;
227};
228
229/* Server capabilities */
230#define NFS_CAP_READDIRPLUS (1U << 0)
231#define NFS_CAP_HARDLINKS (1U << 1)
232#define NFS_CAP_SYMLINKS (1U << 2)
233#define NFS_CAP_ACLS (1U << 3)
234#define NFS_CAP_ATOMIC_OPEN (1U << 4)
235/* #define NFS_CAP_CHANGE_ATTR (1U << 5) */
236#define NFS_CAP_FILEID (1U << 6)
237#define NFS_CAP_MODE (1U << 7)
238#define NFS_CAP_NLINK (1U << 8)
239#define NFS_CAP_OWNER (1U << 9)
240#define NFS_CAP_OWNER_GROUP (1U << 10)
241#define NFS_CAP_ATIME (1U << 11)
242#define NFS_CAP_CTIME (1U << 12)
243#define NFS_CAP_MTIME (1U << 13)
244#define NFS_CAP_POSIX_LOCK (1U << 14)
245#define NFS_CAP_UIDGID_NOMAP (1U << 15)
246#define NFS_CAP_STATEID_NFSV41 (1U << 16)
247#define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17)
248#define NFS_CAP_SECURITY_LABEL (1U << 18)
249#define NFS_CAP_SEEK (1U << 19)
250#define NFS_CAP_ALLOCATE (1U << 20)
251#define NFS_CAP_DEALLOCATE (1U << 21)
252#define NFS_CAP_LAYOUTSTATS (1U << 22)
253#define NFS_CAP_CLONE (1U << 23)
254#define NFS_CAP_COPY (1U << 24)
255
256#endif