fs/nfsd/nfsd.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Hodge-podge collection of knfsd-related stuff.
   4  * I will sort this out later.
   5  *
   6  * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
   7  */
   8
   9 #ifndef LINUX_NFSD_NFSD_H
  10 #define LINUX_NFSD_NFSD_H
  11
  12 #include <linux/types.h>
  13 #include <linux/mount.h>
  14
  15 #include <linux/nfs.h>
  16 #include <linux/nfs2.h>
  17 #include <linux/nfs3.h>
  18 #include <linux/nfs4.h>
  19 #include <linux/sunrpc/svc.h>
  20 #include <linux/sunrpc/svc_xprt.h>
  21 #include <linux/sunrpc/msg_prot.h>
  22 #include <linux/sunrpc/addr.h>
  23
  24 #include <uapi/linux/nfsd/debug.h>
  25
  26 #include "netns.h"
  27 #include "stats.h"
  28 #include "export.h"
  29
  30 #undef ifdebug
  31 #ifdef CONFIG_SUNRPC_DEBUG
  32 # define ifdebug(flag)          if (nfsd_debug & NFSDDBG_##flag)
  33 #else
  34 # define ifdebug(flag)          if (0)
  35 #endif
  36
  37 /*
  38  * nfsd version
  39  */
  40 #define NFSD_SUPPORTED_MINOR_VERSION    2
  41 /*
  42  * Maximum blocksizes supported by daemon under various circumstances.
  43  */
  44 #define NFSSVC_MAXBLKSIZE       RPCSVC_MAXPAYLOAD
  45 /* NFSv2 is limited by the protocol specification, see RFC 1094 */
  46 #define NFSSVC_MAXBLKSIZE_V2    (8*1024)
  47
  48
  49 /*
  50  * Largest number of bytes we need to allocate for an NFS
  51  * call or reply.  Used to control buffer sizes.  We use
  52  * the length of v3 WRITE, READDIR and READDIR replies
  53  * which are an RPC header, up to 26 XDR units of reply
  54  * data, and some page data.
  55  *
  56  * Note that accuracy here doesn't matter too much as the
  57  * size is rounded up to a page size when allocating space.
  58  */
  59 #define NFSD_BUFSIZE            ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
  60
  61 struct readdir_cd {
  62         __be32                  err;    /* 0, nfserr, or nfserr_eof */
  63 };
  64
  65
  66 extern struct svc_program       nfsd_program;
  67 extern const struct svc_version nfsd_version2, nfsd_version3,
  68                                 nfsd_version4;
  69 extern struct mutex             nfsd_mutex;
  70 extern spinlock_t               nfsd_drc_lock;
  71 extern unsigned long            nfsd_drc_max_mem;
  72 extern unsigned long            nfsd_drc_mem_used;
  73
  74 extern const struct seq_operations nfs_exports_op;
  75
  76 /*
  77  * Function prototypes.
  78  */
  79 int             nfsd_svc(int nrservs, struct net *net, const struct cred *cred);
  80 int             nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
  81
  82 int             nfsd_nrthreads(struct net *);
  83 int             nfsd_nrpools(struct net *);
  84 int             nfsd_get_nrthreads(int n, int *, struct net *);
  85 int             nfsd_set_nrthreads(int n, int *, struct net *);
  86 int             nfsd_pool_stats_open(struct inode *, struct file *);
  87 int             nfsd_pool_stats_release(struct inode *, struct file *);
  88
  89 void            nfsd_destroy(struct net *net);
  90
  91 struct nfsdfs_client {
  92         struct kref cl_ref;
  93         void (*cl_release)(struct kref *kref);
  94 };
  95
  96 struct nfsdfs_client *get_nfsdfs_client(struct inode *);
  97 struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
  98                 struct nfsdfs_client *ncl, u32 id, const struct tree_descr *);
  99 void nfsd_client_rmdir(struct dentry *dentry);
 100
 101 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
 102 #ifdef CONFIG_NFSD_V2_ACL
 103 extern const struct svc_version nfsd_acl_version2;
 104 #else
 105 #define nfsd_acl_version2 NULL
 106 #endif
 107 #ifdef CONFIG_NFSD_V3_ACL
 108 extern const struct svc_version nfsd_acl_version3;
 109 #else
 110 #define nfsd_acl_version3 NULL
 111 #endif
 112 #endif
 113
 114 struct nfsd_net;
 115
 116 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
 117 int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
 118 int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
 119 void nfsd_reset_versions(struct nfsd_net *nn);
 120 int nfsd_create_serv(struct net *net);
 121
 122 extern int nfsd_max_blksize;
 123
 124 static inline int nfsd_v4client(struct svc_rqst *rq)
 125 {
 126         return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
 127 }
 128 static inline struct user_namespace *
 129 nfsd_user_namespace(const struct svc_rqst *rqstp)
 130 {
 131         const struct cred *cred = rqstp->rq_xprt->xpt_cred;
 132         return cred ? cred->user_ns : &init_user_ns;
 133 }
 134
 135 /*
 136  * NFSv4 State
 137  */
 138 #ifdef CONFIG_NFSD_V4
 139 extern unsigned long max_delegations;
 140 int nfsd4_init_slabs(void);
 141 void nfsd4_free_slabs(void);
 142 int nfs4_state_start(void);
 143 int nfs4_state_start_net(struct net *net);
 144 void nfs4_state_shutdown(void);
 145 void nfs4_state_shutdown_net(struct net *net);
 146 int nfs4_reset_recoverydir(char *recdir);
 147 char * nfs4_recoverydir(void);
 148 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
 149 #else
 150 static inline int nfsd4_init_slabs(void) { return 0; }
 151 static inline void nfsd4_free_slabs(void) { }
 152 static inline int nfs4_state_start(void) { return 0; }
 153 static inline int nfs4_state_start_net(struct net *net) { return 0; }
 154 static inline void nfs4_state_shutdown(void) { }
 155 static inline void nfs4_state_shutdown_net(struct net *net) { }
 156 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
 157 static inline char * nfs4_recoverydir(void) {return NULL; }
 158 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
 159 {
 160         return false;
 161 }
 162 #endif
 163
 164 /*
 165  * lockd binding
 166  */
 167 void            nfsd_lockd_init(void);
 168 void            nfsd_lockd_shutdown(void);
 169
 170
 171 /*
 172  * These macros provide pre-xdr'ed values for faster operation.
 173  */
 174 #define nfs_ok                  cpu_to_be32(NFS_OK)
 175 #define nfserr_perm             cpu_to_be32(NFSERR_PERM)
 176 #define nfserr_noent            cpu_to_be32(NFSERR_NOENT)
 177 #define nfserr_io               cpu_to_be32(NFSERR_IO)
 178 #define nfserr_nxio             cpu_to_be32(NFSERR_NXIO)
 179 #define nfserr_eagain           cpu_to_be32(NFSERR_EAGAIN)
 180 #define nfserr_acces            cpu_to_be32(NFSERR_ACCES)
 181 #define nfserr_exist            cpu_to_be32(NFSERR_EXIST)
 182 #define nfserr_xdev             cpu_to_be32(NFSERR_XDEV)
 183 #define nfserr_nodev            cpu_to_be32(NFSERR_NODEV)
 184 #define nfserr_notdir           cpu_to_be32(NFSERR_NOTDIR)
 185 #define nfserr_isdir            cpu_to_be32(NFSERR_ISDIR)
 186 #define nfserr_inval            cpu_to_be32(NFSERR_INVAL)
 187 #define nfserr_fbig             cpu_to_be32(NFSERR_FBIG)
 188 #define nfserr_nospc            cpu_to_be32(NFSERR_NOSPC)
 189 #define nfserr_rofs             cpu_to_be32(NFSERR_ROFS)
 190 #define nfserr_mlink            cpu_to_be32(NFSERR_MLINK)
 191 #define nfserr_opnotsupp        cpu_to_be32(NFSERR_OPNOTSUPP)
 192 #define nfserr_nametoolong      cpu_to_be32(NFSERR_NAMETOOLONG)
 193 #define nfserr_notempty         cpu_to_be32(NFSERR_NOTEMPTY)
 194 #define nfserr_dquot            cpu_to_be32(NFSERR_DQUOT)
 195 #define nfserr_stale            cpu_to_be32(NFSERR_STALE)
 196 #define nfserr_remote           cpu_to_be32(NFSERR_REMOTE)
 197 #define nfserr_wflush           cpu_to_be32(NFSERR_WFLUSH)
 198 #define nfserr_badhandle        cpu_to_be32(NFSERR_BADHANDLE)
 199 #define nfserr_notsync          cpu_to_be32(NFSERR_NOT_SYNC)
 200 #define nfserr_badcookie        cpu_to_be32(NFSERR_BAD_COOKIE)
 201 #define nfserr_notsupp          cpu_to_be32(NFSERR_NOTSUPP)
 202 #define nfserr_toosmall         cpu_to_be32(NFSERR_TOOSMALL)
 203 #define nfserr_serverfault      cpu_to_be32(NFSERR_SERVERFAULT)
 204 #define nfserr_badtype          cpu_to_be32(NFSERR_BADTYPE)
 205 #define nfserr_jukebox          cpu_to_be32(NFSERR_JUKEBOX)
 206 #define nfserr_denied           cpu_to_be32(NFSERR_DENIED)
 207 #define nfserr_deadlock         cpu_to_be32(NFSERR_DEADLOCK)
 208 #define nfserr_expired          cpu_to_be32(NFSERR_EXPIRED)
 209 #define nfserr_bad_cookie       cpu_to_be32(NFSERR_BAD_COOKIE)
 210 #define nfserr_same             cpu_to_be32(NFSERR_SAME)
 211 #define nfserr_clid_inuse       cpu_to_be32(NFSERR_CLID_INUSE)
 212 #define nfserr_stale_clientid   cpu_to_be32(NFSERR_STALE_CLIENTID)
 213 #define nfserr_resource         cpu_to_be32(NFSERR_RESOURCE)
 214 #define nfserr_moved            cpu_to_be32(NFSERR_MOVED)
 215 #define nfserr_nofilehandle     cpu_to_be32(NFSERR_NOFILEHANDLE)
 216 #define nfserr_minor_vers_mismatch      cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
 217 #define nfserr_share_denied     cpu_to_be32(NFSERR_SHARE_DENIED)
 218 #define nfserr_stale_stateid    cpu_to_be32(NFSERR_STALE_STATEID)
 219 #define nfserr_old_stateid      cpu_to_be32(NFSERR_OLD_STATEID)
 220 #define nfserr_bad_stateid      cpu_to_be32(NFSERR_BAD_STATEID)
 221 #define nfserr_bad_seqid        cpu_to_be32(NFSERR_BAD_SEQID)
 222 #define nfserr_symlink          cpu_to_be32(NFSERR_SYMLINK)
 223 #define nfserr_not_same         cpu_to_be32(NFSERR_NOT_SAME)
 224 #define nfserr_lock_range       cpu_to_be32(NFSERR_LOCK_RANGE)
 225 #define nfserr_restorefh        cpu_to_be32(NFSERR_RESTOREFH)
 226 #define nfserr_attrnotsupp      cpu_to_be32(NFSERR_ATTRNOTSUPP)
 227 #define nfserr_bad_xdr          cpu_to_be32(NFSERR_BAD_XDR)
 228 #define nfserr_openmode         cpu_to_be32(NFSERR_OPENMODE)
 229 #define nfserr_badowner         cpu_to_be32(NFSERR_BADOWNER)
 230 #define nfserr_locks_held       cpu_to_be32(NFSERR_LOCKS_HELD)
 231 #define nfserr_op_illegal       cpu_to_be32(NFSERR_OP_ILLEGAL)
 232 #define nfserr_grace            cpu_to_be32(NFSERR_GRACE)
 233 #define nfserr_no_grace         cpu_to_be32(NFSERR_NO_GRACE)
 234 #define nfserr_reclaim_bad      cpu_to_be32(NFSERR_RECLAIM_BAD)
 235 #define nfserr_badname          cpu_to_be32(NFSERR_BADNAME)
 236 #define nfserr_cb_path_down     cpu_to_be32(NFSERR_CB_PATH_DOWN)
 237 #define nfserr_locked           cpu_to_be32(NFSERR_LOCKED)
 238 #define nfserr_wrongsec         cpu_to_be32(NFSERR_WRONGSEC)
 239 #define nfserr_badiomode                cpu_to_be32(NFS4ERR_BADIOMODE)
 240 #define nfserr_badlayout                cpu_to_be32(NFS4ERR_BADLAYOUT)
 241 #define nfserr_bad_session_digest       cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
 242 #define nfserr_badsession               cpu_to_be32(NFS4ERR_BADSESSION)
 243 #define nfserr_badslot                  cpu_to_be32(NFS4ERR_BADSLOT)
 244 #define nfserr_complete_already         cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
 245 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
 246 #define nfserr_deleg_already_wanted     cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
 247 #define nfserr_back_chan_busy           cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
 248 #define nfserr_layouttrylater           cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
 249 #define nfserr_layoutunavailable        cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
 250 #define nfserr_nomatching_layout        cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
 251 #define nfserr_recallconflict           cpu_to_be32(NFS4ERR_RECALLCONFLICT)
 252 #define nfserr_unknown_layouttype       cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
 253 #define nfserr_seq_misordered           cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
 254 #define nfserr_sequence_pos             cpu_to_be32(NFS4ERR_SEQUENCE_POS)
 255 #define nfserr_req_too_big              cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
 256 #define nfserr_rep_too_big              cpu_to_be32(NFS4ERR_REP_TOO_BIG)
 257 #define nfserr_rep_too_big_to_cache     cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
 258 #define nfserr_retry_uncached_rep       cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
 259 #define nfserr_unsafe_compound          cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
 260 #define nfserr_too_many_ops             cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
 261 #define nfserr_op_not_in_session        cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
 262 #define nfserr_hash_alg_unsupp          cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
 263 #define nfserr_clientid_busy            cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
 264 #define nfserr_pnfs_io_hole             cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
 265 #define nfserr_seq_false_retry          cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
 266 #define nfserr_bad_high_slot            cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
 267 #define nfserr_deadsession              cpu_to_be32(NFS4ERR_DEADSESSION)
 268 #define nfserr_encr_alg_unsupp          cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
 269 #define nfserr_pnfs_no_layout           cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
 270 #define nfserr_not_only_op              cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
 271 #define nfserr_wrong_cred               cpu_to_be32(NFS4ERR_WRONG_CRED)
 272 #define nfserr_wrong_type               cpu_to_be32(NFS4ERR_WRONG_TYPE)
 273 #define nfserr_dirdeleg_unavail         cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
 274 #define nfserr_reject_deleg             cpu_to_be32(NFS4ERR_REJECT_DELEG)
 275 #define nfserr_returnconflict           cpu_to_be32(NFS4ERR_RETURNCONFLICT)
 276 #define nfserr_deleg_revoked            cpu_to_be32(NFS4ERR_DELEG_REVOKED)
 277 #define nfserr_partner_notsupp          cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
 278 #define nfserr_partner_no_auth          cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
 279 #define nfserr_union_notsupp            cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
 280 #define nfserr_offload_denied           cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
 281 #define nfserr_wrong_lfs                cpu_to_be32(NFS4ERR_WRONG_LFS)
 282 #define nfserr_badlabel                 cpu_to_be32(NFS4ERR_BADLABEL)
 283 #define nfserr_file_open                cpu_to_be32(NFS4ERR_FILE_OPEN)
 284
 285 /* error codes for internal use */
 286 /* if a request fails due to kmalloc failure, it gets dropped.
 287  *  Client should resend eventually
 288  */
 289 #define nfserr_dropit           cpu_to_be32(30000)
 290 /* end-of-file indicator in readdir */
 291 #define nfserr_eof              cpu_to_be32(30001)
 292 /* replay detected */
 293 #define nfserr_replay_me        cpu_to_be32(11001)
 294 /* nfs41 replay detected */
 295 #define nfserr_replay_cache     cpu_to_be32(11002)
 296
 297 /* Check for dir entries '.' and '..' */
 298 #define isdotent(n, l)  (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
 299
 300 #ifdef CONFIG_NFSD_V4
 301
 302 /* before processing a COMPOUND operation, we have to check that there
 303  * is enough space in the buffer for XDR encode to succeed.  otherwise,
 304  * we might process an operation with side effects, and be unable to
 305  * tell the client that the operation succeeded.
 306  *
 307  * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
 308  * needed to encode an "ordinary" _successful_ operation.  (GETATTR,
 309  * READ, READDIR, and READLINK have their own buffer checks.)  if we
 310  * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
 311  *
 312  * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
 313  * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
 314  * care is taken to ensure that we never fall below this level for any
 315  * reason.
 316  */
 317 #define COMPOUND_SLACK_SPACE            140    /* OP_GETFH */
 318 #define COMPOUND_ERR_SLACK_SPACE        16     /* OP_SETATTR */
 319
 320 #define NFSD_LAUNDROMAT_MINTIMEOUT      1   /* seconds */
 321
 322 /*
 323  * The following attributes are currently not supported by the NFSv4 server:
 324  *    ARCHIVE       (deprecated anyway)
 325  *    HIDDEN        (unlikely to be supported any time soon)
 326  *    MIMETYPE      (unlikely to be supported any time soon)
 327  *    QUOTA_*       (will be supported in a forthcoming patch)
 328  *    SYSTEM        (unlikely to be supported any time soon)
 329  *    TIME_BACKUP   (unlikely to be supported any time soon)
 330  *    TIME_CREATE   (unlikely to be supported any time soon)
 331  */
 332 #define NFSD4_SUPPORTED_ATTRS_WORD0                                                         \
 333 (FATTR4_WORD0_SUPPORTED_ATTRS   | FATTR4_WORD0_TYPE         | FATTR4_WORD0_FH_EXPIRE_TYPE   \
 334  | FATTR4_WORD0_CHANGE          | FATTR4_WORD0_SIZE         | FATTR4_WORD0_LINK_SUPPORT     \
 335  | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR   | FATTR4_WORD0_FSID             \
 336  | FATTR4_WORD0_UNIQUE_HANDLES  | FATTR4_WORD0_LEASE_TIME   | FATTR4_WORD0_RDATTR_ERROR     \
 337  | FATTR4_WORD0_ACLSUPPORT      | FATTR4_WORD0_CANSETTIME   | FATTR4_WORD0_CASE_INSENSITIVE \
 338  | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED                             \
 339  | FATTR4_WORD0_FILEHANDLE      | FATTR4_WORD0_FILEID       | FATTR4_WORD0_FILES_AVAIL      \
 340  | FATTR4_WORD0_FILES_FREE      | FATTR4_WORD0_FILES_TOTAL  | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS      \
 341  | FATTR4_WORD0_MAXFILESIZE     | FATTR4_WORD0_MAXLINK      | FATTR4_WORD0_MAXNAME          \
 342  | FATTR4_WORD0_MAXREAD         | FATTR4_WORD0_MAXWRITE     | FATTR4_WORD0_ACL)
 343
 344 #define NFSD4_SUPPORTED_ATTRS_WORD1                                                         \
 345 (FATTR4_WORD1_MODE              | FATTR4_WORD1_NO_TRUNC     | FATTR4_WORD1_NUMLINKS         \
 346  | FATTR4_WORD1_OWNER           | FATTR4_WORD1_OWNER_GROUP  | FATTR4_WORD1_RAWDEV           \
 347  | FATTR4_WORD1_SPACE_AVAIL     | FATTR4_WORD1_SPACE_FREE   | FATTR4_WORD1_SPACE_TOTAL      \
 348  | FATTR4_WORD1_SPACE_USED      | FATTR4_WORD1_TIME_ACCESS  | FATTR4_WORD1_TIME_ACCESS_SET  \
 349  | FATTR4_WORD1_TIME_DELTA   | FATTR4_WORD1_TIME_METADATA    \
 350  | FATTR4_WORD1_TIME_MODIFY     | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
 351
 352 #define NFSD4_SUPPORTED_ATTRS_WORD2 0
 353
 354 /* 4.1 */
 355 #ifdef CONFIG_NFSD_PNFS
 356 #define PNFSD_SUPPORTED_ATTRS_WORD1     FATTR4_WORD1_FS_LAYOUT_TYPES
 357 #define PNFSD_SUPPORTED_ATTRS_WORD2 \
 358 (FATTR4_WORD2_LAYOUT_BLKSIZE    | FATTR4_WORD2_LAYOUT_TYPES)
 359 #else
 360 #define PNFSD_SUPPORTED_ATTRS_WORD1     0
 361 #define PNFSD_SUPPORTED_ATTRS_WORD2     0
 362 #endif /* CONFIG_NFSD_PNFS */
 363
 364 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
 365         NFSD4_SUPPORTED_ATTRS_WORD0
 366
 367 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
 368         (NFSD4_SUPPORTED_ATTRS_WORD1    | PNFSD_SUPPORTED_ATTRS_WORD1)
 369
 370 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
 371         (NFSD4_SUPPORTED_ATTRS_WORD2    | PNFSD_SUPPORTED_ATTRS_WORD2 | \
 372          FATTR4_WORD2_SUPPATTR_EXCLCREAT)
 373
 374 /* 4.2 */
 375 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
 376 #define NFSD4_2_SECURITY_ATTRS          FATTR4_WORD2_SECURITY_LABEL
 377 #else
 378 #define NFSD4_2_SECURITY_ATTRS          0
 379 #endif
 380
 381 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
 382         (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
 383         FATTR4_WORD2_CHANGE_ATTR_TYPE | \
 384         FATTR4_WORD2_MODE_UMASK | \
 385         NFSD4_2_SECURITY_ATTRS)
 386
 387 extern const u32 nfsd_suppattrs[3][3];
 388
 389 static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr,
 390                                     struct nfs42_netaddr *netaddr)
 391 {
 392         struct sockaddr_in *sin = (struct sockaddr_in *)addr;
 393         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
 394         unsigned int port;
 395         size_t ret_addr, ret_port;
 396
 397         switch (addr->sa_family) {
 398         case AF_INET:
 399                 port = ntohs(sin->sin_port);
 400                 sprintf(netaddr->netid, "tcp");
 401                 netaddr->netid_len = 3;
 402                 break;
 403         case AF_INET6:
 404                 port = ntohs(sin6->sin6_port);
 405                 sprintf(netaddr->netid, "tcp6");
 406                 netaddr->netid_len = 4;
 407                 break;
 408         default:
 409                 return nfserr_inval;
 410         }
 411         ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr));
 412         ret_port = snprintf(netaddr->addr + ret_addr,
 413                             RPCBIND_MAXUADDRLEN + 1 - ret_addr,
 414                             ".%u.%u", port >> 8, port & 0xff);
 415         WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr);
 416         netaddr->addr_len = ret_addr + ret_port;
 417         return 0;
 418 }
 419
 420 static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
 421 {
 422         return !((bm1[0] & ~bm2[0]) ||
 423                  (bm1[1] & ~bm2[1]) ||
 424                  (bm1[2] & ~bm2[2]));
 425 }
 426
 427 static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
 428 {
 429         return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
 430 }
 431
 432 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */
 433 #define NFSD_WRITEONLY_ATTRS_WORD1 \
 434         (FATTR4_WORD1_TIME_ACCESS_SET   | FATTR4_WORD1_TIME_MODIFY_SET)
 435
 436 /*
 437  * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
 438  * a writeable attribute here without also adding code to parse it to
 439  * nfsd4_decode_fattr().
 440  */
 441 #define NFSD_WRITEABLE_ATTRS_WORD0 \
 442         (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
 443 #define NFSD_WRITEABLE_ATTRS_WORD1 \
 444         (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
 445         | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
 446 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
 447 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
 448         FATTR4_WORD2_SECURITY_LABEL
 449 #else
 450 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
 451 #endif
 452 #define NFSD_WRITEABLE_ATTRS_WORD2 \
 453         (FATTR4_WORD2_MODE_UMASK \
 454         | MAYBE_FATTR4_WORD2_SECURITY_LABEL)
 455
 456 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
 457         NFSD_WRITEABLE_ATTRS_WORD0
 458 /*
 459  * we currently store the exclusive create verifier in the v_{a,m}time
 460  * attributes so the client can't set these at create time using EXCLUSIVE4_1
 461  */
 462 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
 463         (NFSD_WRITEABLE_ATTRS_WORD1 & \
 464          ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
 465 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
 466         NFSD_WRITEABLE_ATTRS_WORD2
 467
 468 extern int nfsd4_is_junction(struct dentry *dentry);
 469 extern int register_cld_notifier(void);
 470 extern void unregister_cld_notifier(void);
 471 #else /* CONFIG_NFSD_V4 */
 472 static inline int nfsd4_is_junction(struct dentry *dentry)
 473 {
 474         return 0;
 475 }
 476
 477 #define register_cld_notifier() 0
 478 #define unregister_cld_notifier() do { } while(0)
 479
 480 #endif /* CONFIG_NFSD_V4 */
 481
 482 #endif /* LINUX_NFSD_NFSD_H */