cpuset: PF_SPREAD_PAGE and PF_SPREAD_SLAB should be atomic flags
[pandora-kernel.git] / include / linux / nfs_fs_sb.h
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
13 struct nfs4_session;
14 struct nfs_iostats;
15 struct nlm_host;
16 struct nfs4_sequence_args;
17 struct nfs4_sequence_res;
18 struct nfs_server;
19 struct nfs4_minor_version_ops;
20 struct nfs41_server_scope;
21 struct nfs41_impl_id;
22
23 /*
24  * The nfs_client identifies our client state to the server.
25  */
26 struct 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         struct sockaddr_storage cl_addr;        /* server identifier */
46         size_t                  cl_addrlen;
47         char *                  cl_hostname;    /* hostname of server */
48         char *                  cl_acceptor;    /* GSSAPI acceptor name */
49         struct list_head        cl_share_link;  /* link in global client list */
50         struct list_head        cl_superblocks; /* List of nfs_server structs */
51
52         struct rpc_clnt *       cl_rpcclient;
53         const struct nfs_rpc_ops *rpc_ops;      /* NFS protocol vector */
54         int                     cl_proto;       /* Network transport protocol */
55         struct nfs_subversion * cl_nfs_mod;     /* pointer to nfs version module */
56
57         u32                     cl_minorversion;/* NFSv4 minorversion */
58         struct rpc_cred         *cl_machine_cred;
59
60 #if IS_ENABLED(CONFIG_NFS_V4)
61         struct list_head        cl_ds_clients; /* auth flavor data servers */
62         u64                     cl_clientid;    /* constant */
63         nfs4_verifier           cl_confirm;     /* Clientid verifier */
64         unsigned long           cl_state;
65
66         spinlock_t              cl_lock;
67
68         unsigned long           cl_lease_time;
69         unsigned long           cl_last_renewal;
70         struct delayed_work     cl_renewd;
71
72         struct rpc_wait_queue   cl_rpcwaitq;
73
74         /* idmapper */
75         struct idmap *          cl_idmap;
76
77         /* Our own IP address, as a null-terminated string.
78          * This is used to generate the mv0 callback address.
79          */
80         char                    cl_ipaddr[48];
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 #endif /* CONFIG_NFS_V4 */
107
108 #ifdef CONFIG_NFS_FSCACHE
109         struct fscache_cookie   *fscache;       /* client index cache cookie */
110 #endif
111
112         struct net              *cl_net;
113 };
114
115 /*
116  * NFS client parameters stored in the superblock.
117  */
118 struct nfs_server {
119         struct nfs_client *     nfs_client;     /* shared client and NFS4 state */
120         struct list_head        client_link;    /* List of other nfs_server structs
121                                                  * that share the same client
122                                                  */
123         struct list_head        master_link;    /* link in master servers list */
124         struct rpc_clnt *       client;         /* RPC client handle */
125         struct rpc_clnt *       client_acl;     /* ACL RPC client handle */
126         struct nlm_host         *nlm_host;      /* NLM client handle */
127         struct nfs_iostats __percpu *io_stats;  /* I/O statistics */
128         struct backing_dev_info backing_dev_info;
129         atomic_long_t           writeback;      /* number of writeback pages */
130         int                     flags;          /* various flags */
131         unsigned int            caps;           /* server capabilities */
132         unsigned int            rsize;          /* read size */
133         unsigned int            rpages;         /* read size (in pages) */
134         unsigned int            wsize;          /* write size */
135         unsigned int            wpages;         /* write size (in pages) */
136         unsigned int            wtmult;         /* server disk block size */
137         unsigned int            dtsize;         /* readdir size */
138         unsigned short          port;           /* "port=" setting */
139         unsigned int            bsize;          /* server block size */
140         unsigned int            acregmin;       /* attr cache timeouts */
141         unsigned int            acregmax;
142         unsigned int            acdirmin;
143         unsigned int            acdirmax;
144         unsigned int            namelen;
145         unsigned int            options;        /* extra options enabled by mount */
146 #define NFS_OPTION_FSCACHE      0x00000001      /* - local caching enabled */
147 #define NFS_OPTION_MIGRATION    0x00000002      /* - NFSv4 migration enabled */
148
149         struct nfs_fsid         fsid;
150         __u64                   maxfilesize;    /* maximum file size */
151         struct timespec         time_delta;     /* smallest time granularity */
152         unsigned long           mount_time;     /* when this fs was mounted */
153         struct super_block      *super;         /* VFS super block */
154         dev_t                   s_dev;          /* superblock dev numbers */
155         struct nfs_auth_info    auth_info;      /* parsed auth flavors */
156
157 #ifdef CONFIG_NFS_FSCACHE
158         struct nfs_fscache_key  *fscache_key;   /* unique key for superblock */
159         struct fscache_cookie   *fscache;       /* superblock cookie */
160 #endif
161
162         u32                     pnfs_blksize;   /* layout_blksize attr */
163 #if IS_ENABLED(CONFIG_NFS_V4)
164         u32                     attr_bitmask[3];/* V4 bitmask representing the set
165                                                    of attributes supported on this
166                                                    filesystem */
167         u32                     attr_bitmask_nl[3];
168                                                 /* V4 bitmask representing the
169                                                    set of attributes supported
170                                                    on this filesystem excluding
171                                                    the label support bit. */
172         u32                     cache_consistency_bitmask[3];
173                                                 /* V4 bitmask representing the subset
174                                                    of change attribute, size, ctime
175                                                    and mtime attributes supported by
176                                                    the server */
177         u32                     acl_bitmask;    /* V4 bitmask representing the ACEs
178                                                    that are supported on this
179                                                    filesystem */
180         u32                     fh_expire_type; /* V4 bitmask representing file
181                                                    handle volatility type for
182                                                    this filesystem */
183         struct pnfs_layoutdriver_type  *pnfs_curr_ld; /* Active layout driver */
184         struct rpc_wait_queue   roc_rpcwaitq;
185         void                    *pnfs_ld_data;  /* per mount point data */
186
187         /* the following fields are protected by nfs_client->cl_lock */
188         struct rb_root          state_owners;
189 #endif
190         struct ida              openowner_id;
191         struct ida              lockowner_id;
192         struct list_head        state_owners_lru;
193         struct list_head        layouts;
194         struct list_head        delegations;
195
196         unsigned long           mig_gen;
197         unsigned long           mig_status;
198 #define NFS_MIG_IN_TRANSITION           (1)
199 #define NFS_MIG_FAILED                  (2)
200
201         void (*destroy)(struct nfs_server *);
202
203         atomic_t active; /* Keep trace of any activity to this server */
204
205         /* mountd-related mount options */
206         struct sockaddr_storage mountd_address;
207         size_t                  mountd_addrlen;
208         u32                     mountd_version;
209         unsigned short          mountd_port;
210         unsigned short          mountd_protocol;
211 };
212
213 /* Server capabilities */
214 #define NFS_CAP_READDIRPLUS     (1U << 0)
215 #define NFS_CAP_HARDLINKS       (1U << 1)
216 #define NFS_CAP_SYMLINKS        (1U << 2)
217 #define NFS_CAP_ACLS            (1U << 3)
218 #define NFS_CAP_ATOMIC_OPEN     (1U << 4)
219 #define NFS_CAP_CHANGE_ATTR     (1U << 5)
220 #define NFS_CAP_FILEID          (1U << 6)
221 #define NFS_CAP_MODE            (1U << 7)
222 #define NFS_CAP_NLINK           (1U << 8)
223 #define NFS_CAP_OWNER           (1U << 9)
224 #define NFS_CAP_OWNER_GROUP     (1U << 10)
225 #define NFS_CAP_ATIME           (1U << 11)
226 #define NFS_CAP_CTIME           (1U << 12)
227 #define NFS_CAP_MTIME           (1U << 13)
228 #define NFS_CAP_POSIX_LOCK      (1U << 14)
229 #define NFS_CAP_UIDGID_NOMAP    (1U << 15)
230 #define NFS_CAP_STATEID_NFSV41  (1U << 16)
231 #define NFS_CAP_ATOMIC_OPEN_V1  (1U << 17)
232 #define NFS_CAP_SECURITY_LABEL  (1U << 18)
233
234 #endif