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 bool            i_am_nfsd(void);
  92
  93 struct nfsdfs_client {
  94         struct kref cl_ref;
  95         void (*cl_release)(struct kref *kref);
  96 };
  97
  98 struct nfsdfs_client *get_nfsdfs_client(struct inode *);
  99 struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
 100                 struct nfsdfs_client *ncl, u32 id, const struct tree_descr *);
 101 void nfsd_client_rmdir(struct dentry *dentry);
 102
 103 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
 104 #ifdef CONFIG_NFSD_V2_ACL
 105 extern const struct svc_version nfsd_acl_version2;
 106 #else
 107 #define nfsd_acl_version2 NULL
 108 #endif
 109 #ifdef CONFIG_NFSD_V3_ACL
 110 extern const struct svc_version nfsd_acl_version3;
 111 #else
 112 #define nfsd_acl_version3 NULL
 113 #endif
 114 #endif
 115
 116 struct nfsd_net;
 117
 118 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
 119 int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
 120 int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
 121 void nfsd_reset_versions(struct nfsd_net *nn);
 122 int nfsd_create_serv(struct net *net);
 123
 124 extern int nfsd_max_blksize;
 125
 126 static inline int nfsd_v4client(struct svc_rqst *rq)
 127 {
 128         return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
 129 }
 130 static inline struct user_namespace *
 131 nfsd_user_namespace(const struct svc_rqst *rqstp)
 132 {
 133         const struct cred *cred = rqstp->rq_xprt->xpt_cred;
 134         return cred ? cred->user_ns : &init_user_ns;
 135 }
 136
 137 /*
 138  * NFSv4 State
 139  */
 140 #ifdef CONFIG_NFSD_V4
 141 extern unsigned long max_delegations;
 142 int nfsd4_init_slabs(void);
 143 void nfsd4_free_slabs(void);
 144 int nfs4_state_start(void);
 145 int nfs4_state_start_net(struct net *net);
 146 void nfs4_state_shutdown(void);
 147 void nfs4_state_shutdown_net(struct net *net);
 148 int nfs4_reset_recoverydir(char *recdir);
 149 char * nfs4_recoverydir(void);
 150 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
 151 #else
 152 static inline int nfsd4_init_slabs(void) { return 0; }
 153 static inline void nfsd4_free_slabs(void) { }
 154 static inline int nfs4_state_start(void) { return 0; }
 155 static inline int nfs4_state_start_net(struct net *net) { return 0; }
 156 static inline void nfs4_state_shutdown(void) { }
 157 static inline void nfs4_state_shutdown_net(struct net *net) { }
 158 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
 159 static inline char * nfs4_recoverydir(void) {return NULL; }
 160 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
 161 {
 162         return false;
 163 }
 164 #endif
 165
 166 /*
 167  * lockd binding
 168  */
 169 void            nfsd_lockd_init(void);
 170 void            nfsd_lockd_shutdown(void);
 171
 172
 173 /*
 174  * These macros provide pre-xdr'ed values for faster operation.
 175  */
 176 #define nfs_ok                  cpu_to_be32(NFS_OK)
 177 #define nfserr_perm             cpu_to_be32(NFSERR_PERM)
 178 #define nfserr_noent            cpu_to_be32(NFSERR_NOENT)
 179 #define nfserr_io               cpu_to_be32(NFSERR_IO)
 180 #define nfserr_nxio             cpu_to_be32(NFSERR_NXIO)
 181 #define nfserr_eagain           cpu_to_be32(NFSERR_EAGAIN)
 182 #define nfserr_acces            cpu_to_be32(NFSERR_ACCES)
 183 #define nfserr_exist            cpu_to_be32(NFSERR_EXIST)
 184 #define nfserr_xdev             cpu_to_be32(NFSERR_XDEV)
 185 #define nfserr_nodev            cpu_to_be32(NFSERR_NODEV)
 186 #define nfserr_notdir           cpu_to_be32(NFSERR_NOTDIR)
 187 #define nfserr_isdir            cpu_to_be32(NFSERR_ISDIR)
 188 #define nfserr_inval            cpu_to_be32(NFSERR_INVAL)
 189 #define nfserr_fbig             cpu_to_be32(NFSERR_FBIG)
 190 #define nfserr_nospc            cpu_to_be32(NFSERR_NOSPC)
 191 #define nfserr_rofs             cpu_to_be32(NFSERR_ROFS)
 192 #define nfserr_mlink            cpu_to_be32(NFSERR_MLINK)
 193 #define nfserr_opnotsupp        cpu_to_be32(NFSERR_OPNOTSUPP)
 194 #define nfserr_nametoolong      cpu_to_be32(NFSERR_NAMETOOLONG)
 195 #define nfserr_notempty         cpu_to_be32(NFSERR_NOTEMPTY)
 196 #define nfserr_dquot            cpu_to_be32(NFSERR_DQUOT)
 197 #define nfserr_stale            cpu_to_be32(NFSERR_STALE)
 198 #define nfserr_remote           cpu_to_be32(NFSERR_REMOTE)
 199 #define nfserr_wflush           cpu_to_be32(NFSERR_WFLUSH)
 200 #define nfserr_badhandle        cpu_to_be32(NFSERR_BADHANDLE)
 201 #define nfserr_notsync          cpu_to_be32(NFSERR_NOT_SYNC)
 202 #define nfserr_badcookie        cpu_to_be32(NFSERR_BAD_COOKIE)
 203 #define nfserr_notsupp          cpu_to_be32(NFSERR_NOTSUPP)
 204 #define nfserr_toosmall         cpu_to_be32(NFSERR_TOOSMALL)
 205 #define nfserr_serverfault      cpu_to_be32(NFSERR_SERVERFAULT)
 206 #define nfserr_badtype          cpu_to_be32(NFSERR_BADTYPE)
 207 #define nfserr_jukebox          cpu_to_be32(NFSERR_JUKEBOX)
 208 #define nfserr_denied           cpu_to_be32(NFSERR_DENIED)
 209 #define nfserr_deadlock         cpu_to_be32(NFSERR_DEADLOCK)
 210 #define nfserr_expired          cpu_to_be32(NFSERR_EXPIRED)
 211 #define nfserr_bad_cookie       cpu_to_be32(NFSERR_BAD_COOKIE)
 212 #define nfserr_same             cpu_to_be32(NFSERR_SAME)
 213 #define nfserr_clid_inuse       cpu_to_be32(NFSERR_CLID_INUSE)
 214 #define nfserr_stale_clientid   cpu_to_be32(NFSERR_STALE_CLIENTID)
 215 #define nfserr_resource         cpu_to_be32(NFSERR_RESOURCE)
 216 #define nfserr_moved            cpu_to_be32(NFSERR_MOVED)
 217 #define nfserr_nofilehandle     cpu_to_be32(NFSERR_NOFILEHANDLE)
 218 #define nfserr_minor_vers_mismatch      cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
 219 #define nfserr_share_denied     cpu_to_be32(NFSERR_SHARE_DENIED)
 220 #define nfserr_stale_stateid    cpu_to_be32(NFSERR_STALE_STATEID)
 221 #define nfserr_old_stateid      cpu_to_be32(NFSERR_OLD_STATEID)
 222 #define nfserr_bad_stateid      cpu_to_be32(NFSERR_BAD_STATEID)
 223 #define nfserr_bad_seqid        cpu_to_be32(NFSERR_BAD_SEQID)
 224 #define nfserr_symlink          cpu_to_be32(NFSERR_SYMLINK)
 225 #define nfserr_not_same         cpu_to_be32(NFSERR_NOT_SAME)
 226 #define nfserr_lock_range       cpu_to_be32(NFSERR_LOCK_RANGE)
 227 #define nfserr_restorefh        cpu_to_be32(NFSERR_RESTOREFH)
 228 #define nfserr_attrnotsupp      cpu_to_be32(NFSERR_ATTRNOTSUPP)
 229 #define nfserr_bad_xdr          cpu_to_be32(NFSERR_BAD_XDR)
 230 #define nfserr_openmode         cpu_to_be32(NFSERR_OPENMODE)
 231 #define nfserr_badowner         cpu_to_be32(NFSERR_BADOWNER)
 232 #define nfserr_locks_held       cpu_to_be32(NFSERR_LOCKS_HELD)
 233 #define nfserr_op_illegal       cpu_to_be32(NFSERR_OP_ILLEGAL)
 234 #define nfserr_grace            cpu_to_be32(NFSERR_GRACE)
 235 #define nfserr_no_grace         cpu_to_be32(NFSERR_NO_GRACE)
 236 #define nfserr_reclaim_bad      cpu_to_be32(NFSERR_RECLAIM_BAD)
 237 #define nfserr_badname          cpu_to_be32(NFSERR_BADNAME)
 238 #define nfserr_cb_path_down     cpu_to_be32(NFSERR_CB_PATH_DOWN)
 239 #define nfserr_locked           cpu_to_be32(NFSERR_LOCKED)
 240 #define nfserr_wrongsec         cpu_to_be32(NFSERR_WRONGSEC)
 241 #define nfserr_badiomode                cpu_to_be32(NFS4ERR_BADIOMODE)
 242 #define nfserr_badlayout                cpu_to_be32(NFS4ERR_BADLAYOUT)
 243 #define nfserr_bad_session_digest       cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
 244 #define nfserr_badsession               cpu_to_be32(NFS4ERR_BADSESSION)
 245 #define nfserr_badslot                  cpu_to_be32(NFS4ERR_BADSLOT)
 246 #define nfserr_complete_already         cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
 247 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
 248 #define nfserr_deleg_already_wanted     cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
 249 #define nfserr_back_chan_busy           cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
 250 #define nfserr_layouttrylater           cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
 251 #define nfserr_layoutunavailable        cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
 252 #define nfserr_nomatching_layout        cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
 253 #define nfserr_recallconflict           cpu_to_be32(NFS4ERR_RECALLCONFLICT)
 254 #define nfserr_unknown_layouttype       cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
 255 #define nfserr_seq_misordered           cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
 256 #define nfserr_sequence_pos             cpu_to_be32(NFS4ERR_SEQUENCE_POS)
 257 #define nfserr_req_too_big              cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
 258 #define nfserr_rep_too_big              cpu_to_be32(NFS4ERR_REP_TOO_BIG)
 259 #define nfserr_rep_too_big_to_cache     cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
 260 #define nfserr_retry_uncached_rep       cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
 261 #define nfserr_unsafe_compound          cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
 262 #define nfserr_too_many_ops             cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
 263 #define nfserr_op_not_in_session        cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
 264 #define nfserr_hash_alg_unsupp          cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
 265 #define nfserr_clientid_busy            cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
 266 #define nfserr_pnfs_io_hole             cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
 267 #define nfserr_seq_false_retry          cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
 268 #define nfserr_bad_high_slot            cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
 269 #define nfserr_deadsession              cpu_to_be32(NFS4ERR_DEADSESSION)
 270 #define nfserr_encr_alg_unsupp          cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
 271 #define nfserr_pnfs_no_layout           cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
 272 #define nfserr_not_only_op              cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
 273 #define nfserr_wrong_cred               cpu_to_be32(NFS4ERR_WRONG_CRED)
 274 #define nfserr_wrong_type               cpu_to_be32(NFS4ERR_WRONG_TYPE)
 275 #define nfserr_dirdeleg_unavail         cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
 276 #define nfserr_reject_deleg             cpu_to_be32(NFS4ERR_REJECT_DELEG)
 277 #define nfserr_returnconflict           cpu_to_be32(NFS4ERR_RETURNCONFLICT)
 278 #define nfserr_deleg_revoked            cpu_to_be32(NFS4ERR_DELEG_REVOKED)
 279 #define nfserr_partner_notsupp          cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
 280 #define nfserr_partner_no_auth          cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
 281 #define nfserr_union_notsupp            cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
 282 #define nfserr_offload_denied           cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
 283 #define nfserr_wrong_lfs                cpu_to_be32(NFS4ERR_WRONG_LFS)
 284 #define nfserr_badlabel                 cpu_to_be32(NFS4ERR_BADLABEL)
 285 #define nfserr_file_open                cpu_to_be32(NFS4ERR_FILE_OPEN)
 286
 287 /* error codes for internal use */
 288 /* if a request fails due to kmalloc failure, it gets dropped.
 289  *  Client should resend eventually
 290  */
 291 #define nfserr_dropit           cpu_to_be32(30000)
 292 /* end-of-file indicator in readdir */
 293 #define nfserr_eof              cpu_to_be32(30001)
 294 /* replay detected */
 295 #define nfserr_replay_me        cpu_to_be32(11001)
 296 /* nfs41 replay detected */
 297 #define nfserr_replay_cache     cpu_to_be32(11002)
 298
 299 /* Check for dir entries '.' and '..' */
 300 #define isdotent(n, l)  (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
 301
 302 #ifdef CONFIG_NFSD_V4
 303
 304 /* before processing a COMPOUND operation, we have to check that there
 305  * is enough space in the buffer for XDR encode to succeed.  otherwise,
 306  * we might process an operation with side effects, and be unable to
 307  * tell the client that the operation succeeded.
 308  *
 309  * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
 310  * needed to encode an "ordinary" _successful_ operation.  (GETATTR,
 311  * READ, READDIR, and READLINK have their own buffer checks.)  if we
 312  * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
 313  *
 314  * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
 315  * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
 316  * care is taken to ensure that we never fall below this level for any
 317  * reason.
 318  */
 319 #define COMPOUND_SLACK_SPACE            140    /* OP_GETFH */
 320 #define COMPOUND_ERR_SLACK_SPACE        16     /* OP_SETATTR */
 321
 322 #define NFSD_LAUNDROMAT_MINTIMEOUT      1   /* seconds */
 323
 324 /*
 325  * The following attributes are currently not supported by the NFSv4 server:
 326  *    ARCHIVE       (deprecated anyway)
 327  *    HIDDEN        (unlikely to be supported any time soon)
 328  *    MIMETYPE      (unlikely to be supported any time soon)
 329  *    QUOTA_*       (will be supported in a forthcoming patch)
 330  *    SYSTEM        (unlikely to be supported any time soon)
 331  *    TIME_BACKUP   (unlikely to be supported any time soon)
 332  *    TIME_CREATE   (unlikely to be supported any time soon)
 333  */
 334 #define NFSD4_SUPPORTED_ATTRS_WORD0                                                         \
 335 (FATTR4_WORD0_SUPPORTED_ATTRS   | FATTR4_WORD0_TYPE         | FATTR4_WORD0_FH_EXPIRE_TYPE   \
 336  | FATTR4_WORD0_CHANGE          | FATTR4_WORD0_SIZE         | FATTR4_WORD0_LINK_SUPPORT     \
 337  | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR   | FATTR4_WORD0_FSID             \
 338  | FATTR4_WORD0_UNIQUE_HANDLES  | FATTR4_WORD0_LEASE_TIME   | FATTR4_WORD0_RDATTR_ERROR     \
 339  | FATTR4_WORD0_ACLSUPPORT      | FATTR4_WORD0_CANSETTIME   | FATTR4_WORD0_CASE_INSENSITIVE \
 340  | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED                             \
 341  | FATTR4_WORD0_FILEHANDLE      | FATTR4_WORD0_FILEID       | FATTR4_WORD0_FILES_AVAIL      \
 342  | FATTR4_WORD0_FILES_FREE      | FATTR4_WORD0_FILES_TOTAL  | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS      \
 343  | FATTR4_WORD0_MAXFILESIZE     | FATTR4_WORD0_MAXLINK      | FATTR4_WORD0_MAXNAME          \
 344  | FATTR4_WORD0_MAXREAD         | FATTR4_WORD0_MAXWRITE     | FATTR4_WORD0_ACL)
 345
 346 #define NFSD4_SUPPORTED_ATTRS_WORD1                                                         \
 347 (FATTR4_WORD1_MODE              | FATTR4_WORD1_NO_TRUNC     | FATTR4_WORD1_NUMLINKS         \
 348  | FATTR4_WORD1_OWNER           | FATTR4_WORD1_OWNER_GROUP  | FATTR4_WORD1_RAWDEV           \
 349  | FATTR4_WORD1_SPACE_AVAIL     | FATTR4_WORD1_SPACE_FREE   | FATTR4_WORD1_SPACE_TOTAL      \
 350  | FATTR4_WORD1_SPACE_USED      | FATTR4_WORD1_TIME_ACCESS  | FATTR4_WORD1_TIME_ACCESS_SET  \
 351  | FATTR4_WORD1_TIME_DELTA   | FATTR4_WORD1_TIME_METADATA    \
 352  | FATTR4_WORD1_TIME_MODIFY     | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
 353
 354 #define NFSD4_SUPPORTED_ATTRS_WORD2 0
 355
 356 /* 4.1 */
 357 #ifdef CONFIG_NFSD_PNFS
 358 #define PNFSD_SUPPORTED_ATTRS_WORD1     FATTR4_WORD1_FS_LAYOUT_TYPES
 359 #define PNFSD_SUPPORTED_ATTRS_WORD2 \
 360 (FATTR4_WORD2_LAYOUT_BLKSIZE    | FATTR4_WORD2_LAYOUT_TYPES)
 361 #else
 362 #define PNFSD_SUPPORTED_ATTRS_WORD1     0
 363 #define PNFSD_SUPPORTED_ATTRS_WORD2     0
 364 #endif /* CONFIG_NFSD_PNFS */
 365
 366 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
 367         NFSD4_SUPPORTED_ATTRS_WORD0
 368
 369 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
 370         (NFSD4_SUPPORTED_ATTRS_WORD1    | PNFSD_SUPPORTED_ATTRS_WORD1)
 371
 372 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
 373         (NFSD4_SUPPORTED_ATTRS_WORD2    | PNFSD_SUPPORTED_ATTRS_WORD2 | \
 374          FATTR4_WORD2_SUPPATTR_EXCLCREAT)
 375
 376 /* 4.2 */
 377 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
 378 #define NFSD4_2_SECURITY_ATTRS          FATTR4_WORD2_SECURITY_LABEL
 379 #else
 380 #define NFSD4_2_SECURITY_ATTRS          0
 381 #endif
 382
 383 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
 384         (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
 385         FATTR4_WORD2_CHANGE_ATTR_TYPE | \
 386         FATTR4_WORD2_MODE_UMASK | \
 387         NFSD4_2_SECURITY_ATTRS)
 388
 389 extern const u32 nfsd_suppattrs[3][3];
 390
 391 static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr,
 392                                     struct nfs42_netaddr *netaddr)
 393 {
 394         struct sockaddr_in *sin = (struct sockaddr_in *)addr;
 395         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
 396         unsigned int port;
 397         size_t ret_addr, ret_port;
 398
 399         switch (addr->sa_family) {
 400         case AF_INET:
 401                 port = ntohs(sin->sin_port);
 402                 sprintf(netaddr->netid, "tcp");
 403                 netaddr->netid_len = 3;
 404                 break;
 405         case AF_INET6:
 406                 port = ntohs(sin6->sin6_port);
 407                 sprintf(netaddr->netid, "tcp6");
 408                 netaddr->netid_len = 4;
 409                 break;
 410         default:
 411                 return nfserr_inval;
 412         }
 413         ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr));
 414         ret_port = snprintf(netaddr->addr + ret_addr,
 415                             RPCBIND_MAXUADDRLEN + 1 - ret_addr,
 416                             ".%u.%u", port >> 8, port & 0xff);
 417         WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr);
 418         netaddr->addr_len = ret_addr + ret_port;
 419         return 0;
 420 }
 421
 422 static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
 423 {
 424         return !((bm1[0] & ~bm2[0]) ||
 425                  (bm1[1] & ~bm2[1]) ||
 426                  (bm1[2] & ~bm2[2]));
 427 }
 428
 429 static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
 430 {
 431         return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
 432 }
 433
 434 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */
 435 #define NFSD_WRITEONLY_ATTRS_WORD1 \
 436         (FATTR4_WORD1_TIME_ACCESS_SET   | FATTR4_WORD1_TIME_MODIFY_SET)
 437
 438 /*
 439  * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
 440  * a writeable attribute here without also adding code to parse it to
 441  * nfsd4_decode_fattr().
 442  */
 443 #define NFSD_WRITEABLE_ATTRS_WORD0 \
 444         (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
 445 #define NFSD_WRITEABLE_ATTRS_WORD1 \
 446         (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
 447         | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
 448 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
 449 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
 450         FATTR4_WORD2_SECURITY_LABEL
 451 #else
 452 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
 453 #endif
 454 #define NFSD_WRITEABLE_ATTRS_WORD2 \
 455         (FATTR4_WORD2_MODE_UMASK \
 456         | MAYBE_FATTR4_WORD2_SECURITY_LABEL)
 457
 458 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
 459         NFSD_WRITEABLE_ATTRS_WORD0
 460 /*
 461  * we currently store the exclusive create verifier in the v_{a,m}time
 462  * attributes so the client can't set these at create time using EXCLUSIVE4_1
 463  */
 464 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
 465         (NFSD_WRITEABLE_ATTRS_WORD1 & \
 466          ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
 467 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
 468         NFSD_WRITEABLE_ATTRS_WORD2
 469
 470 extern int nfsd4_is_junction(struct dentry *dentry);
 471 extern int register_cld_notifier(void);
 472 extern void unregister_cld_notifier(void);
 473 #else /* CONFIG_NFSD_V4 */
 474 static inline int nfsd4_is_junction(struct dentry *dentry)
 475 {
 476         return 0;
 477 }
 478
 479 #define register_cld_notifier() 0
 480 #define unregister_cld_notifier() do { } while(0)
 481
 482 #endif /* CONFIG_NFSD_V4 */
 483
 484 #endif /* LINUX_NFSD_NFSD_H */