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 "export.h"
  28 #include "stats.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  * Common void argument and result helpers
  78  */
  79 struct nfsd_voidargs { };
  80 struct nfsd_voidres { };
  81 int             nfssvc_decode_voidarg(struct svc_rqst *rqstp, __be32 *p);
  82 int             nfssvc_encode_voidres(struct svc_rqst *rqstp, __be32 *p);
  83
  84 /*
  85  * Function prototypes.
  86  */
  87 int             nfsd_svc(int nrservs, struct net *net, const struct cred *cred);
  88 int             nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
  89
  90 int             nfsd_nrthreads(struct net *);
  91 int             nfsd_nrpools(struct net *);
  92 int             nfsd_get_nrthreads(int n, int *, struct net *);
  93 int             nfsd_set_nrthreads(int n, int *, struct net *);
  94 int             nfsd_pool_stats_open(struct inode *, struct file *);
  95 int             nfsd_pool_stats_release(struct inode *, struct file *);
  96 void            nfsd_shutdown_threads(struct net *net);
  97
  98 void            nfsd_destroy(struct net *net);
  99
 100 bool            i_am_nfsd(void);
 101
 102 struct nfsdfs_client {
 103         struct kref cl_ref;
 104         void (*cl_release)(struct kref *kref);
 105 };
 106
 107 struct nfsdfs_client *get_nfsdfs_client(struct inode *);
 108 struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
 109                                  struct nfsdfs_client *ncl, u32 id,
 110                                  const struct tree_descr *,
 111                                  struct dentry **fdentries);
 112 void nfsd_client_rmdir(struct dentry *dentry);
 113
 114
 115 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
 116 #ifdef CONFIG_NFSD_V2_ACL
 117 extern const struct svc_version nfsd_acl_version2;
 118 #else
 119 #define nfsd_acl_version2 NULL
 120 #endif
 121 #ifdef CONFIG_NFSD_V3_ACL
 122 extern const struct svc_version nfsd_acl_version3;
 123 #else
 124 #define nfsd_acl_version3 NULL
 125 #endif
 126 #endif
 127
 128 struct nfsd_net;
 129
 130 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
 131 int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
 132 int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
 133 void nfsd_reset_versions(struct nfsd_net *nn);
 134 int nfsd_create_serv(struct net *net);
 135
 136 extern int nfsd_max_blksize;
 137
 138 static inline int nfsd_v4client(struct svc_rqst *rq)
 139 {
 140         return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
 141 }
 142 static inline struct user_namespace *
 143 nfsd_user_namespace(const struct svc_rqst *rqstp)
 144 {
 145         const struct cred *cred = rqstp->rq_xprt->xpt_cred;
 146         return cred ? cred->user_ns : &init_user_ns;
 147 }
 148
 149 /*
 150  * NFSv4 State
 151  */
 152 #ifdef CONFIG_NFSD_V4
 153 extern unsigned long max_delegations;
 154 int nfsd4_init_slabs(void);
 155 void nfsd4_free_slabs(void);
 156 int nfs4_state_start(void);
 157 int nfs4_state_start_net(struct net *net);
 158 void nfs4_state_shutdown(void);
 159 void nfs4_state_shutdown_net(struct net *net);
 160 int nfs4_reset_recoverydir(char *recdir);
 161 char * nfs4_recoverydir(void);
 162 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
 163 #else
 164 static inline int nfsd4_init_slabs(void) { return 0; }
 165 static inline void nfsd4_free_slabs(void) { }
 166 static inline int nfs4_state_start(void) { return 0; }
 167 static inline int nfs4_state_start_net(struct net *net) { return 0; }
 168 static inline void nfs4_state_shutdown(void) { }
 169 static inline void nfs4_state_shutdown_net(struct net *net) { }
 170 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
 171 static inline char * nfs4_recoverydir(void) {return NULL; }
 172 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
 173 {
 174         return false;
 175 }
 176 #endif
 177
 178 /*
 179  * lockd binding
 180  */
 181 void            nfsd_lockd_init(void);
 182 void            nfsd_lockd_shutdown(void);
 183
 184
 185 /*
 186  * These macros provide pre-xdr'ed values for faster operation.
 187  */
 188 #define nfs_ok                  cpu_to_be32(NFS_OK)
 189 #define nfserr_perm             cpu_to_be32(NFSERR_PERM)
 190 #define nfserr_noent            cpu_to_be32(NFSERR_NOENT)
 191 #define nfserr_io               cpu_to_be32(NFSERR_IO)
 192 #define nfserr_nxio             cpu_to_be32(NFSERR_NXIO)
 193 #define nfserr_eagain           cpu_to_be32(NFSERR_EAGAIN)
 194 #define nfserr_acces            cpu_to_be32(NFSERR_ACCES)
 195 #define nfserr_exist            cpu_to_be32(NFSERR_EXIST)
 196 #define nfserr_xdev             cpu_to_be32(NFSERR_XDEV)
 197 #define nfserr_nodev            cpu_to_be32(NFSERR_NODEV)
 198 #define nfserr_notdir           cpu_to_be32(NFSERR_NOTDIR)
 199 #define nfserr_isdir            cpu_to_be32(NFSERR_ISDIR)
 200 #define nfserr_inval            cpu_to_be32(NFSERR_INVAL)
 201 #define nfserr_fbig             cpu_to_be32(NFSERR_FBIG)
 202 #define nfserr_nospc            cpu_to_be32(NFSERR_NOSPC)
 203 #define nfserr_rofs             cpu_to_be32(NFSERR_ROFS)
 204 #define nfserr_mlink            cpu_to_be32(NFSERR_MLINK)
 205 #define nfserr_opnotsupp        cpu_to_be32(NFSERR_OPNOTSUPP)
 206 #define nfserr_nametoolong      cpu_to_be32(NFSERR_NAMETOOLONG)
 207 #define nfserr_notempty         cpu_to_be32(NFSERR_NOTEMPTY)
 208 #define nfserr_dquot            cpu_to_be32(NFSERR_DQUOT)
 209 #define nfserr_stale            cpu_to_be32(NFSERR_STALE)
 210 #define nfserr_remote           cpu_to_be32(NFSERR_REMOTE)
 211 #define nfserr_wflush           cpu_to_be32(NFSERR_WFLUSH)
 212 #define nfserr_badhandle        cpu_to_be32(NFSERR_BADHANDLE)
 213 #define nfserr_notsync          cpu_to_be32(NFSERR_NOT_SYNC)
 214 #define nfserr_badcookie        cpu_to_be32(NFSERR_BAD_COOKIE)
 215 #define nfserr_notsupp          cpu_to_be32(NFSERR_NOTSUPP)
 216 #define nfserr_toosmall         cpu_to_be32(NFSERR_TOOSMALL)
 217 #define nfserr_serverfault      cpu_to_be32(NFSERR_SERVERFAULT)
 218 #define nfserr_badtype          cpu_to_be32(NFSERR_BADTYPE)
 219 #define nfserr_jukebox          cpu_to_be32(NFSERR_JUKEBOX)
 220 #define nfserr_denied           cpu_to_be32(NFSERR_DENIED)
 221 #define nfserr_deadlock         cpu_to_be32(NFSERR_DEADLOCK)
 222 #define nfserr_expired          cpu_to_be32(NFSERR_EXPIRED)
 223 #define nfserr_bad_cookie       cpu_to_be32(NFSERR_BAD_COOKIE)
 224 #define nfserr_same             cpu_to_be32(NFSERR_SAME)
 225 #define nfserr_clid_inuse       cpu_to_be32(NFSERR_CLID_INUSE)
 226 #define nfserr_stale_clientid   cpu_to_be32(NFSERR_STALE_CLIENTID)
 227 #define nfserr_resource         cpu_to_be32(NFSERR_RESOURCE)
 228 #define nfserr_moved            cpu_to_be32(NFSERR_MOVED)
 229 #define nfserr_nofilehandle     cpu_to_be32(NFSERR_NOFILEHANDLE)
 230 #define nfserr_minor_vers_mismatch      cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
 231 #define nfserr_share_denied     cpu_to_be32(NFSERR_SHARE_DENIED)
 232 #define nfserr_stale_stateid    cpu_to_be32(NFSERR_STALE_STATEID)
 233 #define nfserr_old_stateid      cpu_to_be32(NFSERR_OLD_STATEID)
 234 #define nfserr_bad_stateid      cpu_to_be32(NFSERR_BAD_STATEID)
 235 #define nfserr_bad_seqid        cpu_to_be32(NFSERR_BAD_SEQID)
 236 #define nfserr_symlink          cpu_to_be32(NFSERR_SYMLINK)
 237 #define nfserr_not_same         cpu_to_be32(NFSERR_NOT_SAME)
 238 #define nfserr_lock_range       cpu_to_be32(NFSERR_LOCK_RANGE)
 239 #define nfserr_restorefh        cpu_to_be32(NFSERR_RESTOREFH)
 240 #define nfserr_attrnotsupp      cpu_to_be32(NFSERR_ATTRNOTSUPP)
 241 #define nfserr_bad_xdr          cpu_to_be32(NFSERR_BAD_XDR)
 242 #define nfserr_openmode         cpu_to_be32(NFSERR_OPENMODE)
 243 #define nfserr_badowner         cpu_to_be32(NFSERR_BADOWNER)
 244 #define nfserr_locks_held       cpu_to_be32(NFSERR_LOCKS_HELD)
 245 #define nfserr_op_illegal       cpu_to_be32(NFSERR_OP_ILLEGAL)
 246 #define nfserr_grace            cpu_to_be32(NFSERR_GRACE)
 247 #define nfserr_no_grace         cpu_to_be32(NFSERR_NO_GRACE)
 248 #define nfserr_reclaim_bad      cpu_to_be32(NFSERR_RECLAIM_BAD)
 249 #define nfserr_badname          cpu_to_be32(NFSERR_BADNAME)
 250 #define nfserr_cb_path_down     cpu_to_be32(NFSERR_CB_PATH_DOWN)
 251 #define nfserr_locked           cpu_to_be32(NFSERR_LOCKED)
 252 #define nfserr_wrongsec         cpu_to_be32(NFSERR_WRONGSEC)
 253 #define nfserr_badiomode                cpu_to_be32(NFS4ERR_BADIOMODE)
 254 #define nfserr_badlayout                cpu_to_be32(NFS4ERR_BADLAYOUT)
 255 #define nfserr_bad_session_digest       cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
 256 #define nfserr_badsession               cpu_to_be32(NFS4ERR_BADSESSION)
 257 #define nfserr_badslot                  cpu_to_be32(NFS4ERR_BADSLOT)
 258 #define nfserr_complete_already         cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
 259 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
 260 #define nfserr_deleg_already_wanted     cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
 261 #define nfserr_back_chan_busy           cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
 262 #define nfserr_layouttrylater           cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
 263 #define nfserr_layoutunavailable        cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
 264 #define nfserr_nomatching_layout        cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
 265 #define nfserr_recallconflict           cpu_to_be32(NFS4ERR_RECALLCONFLICT)
 266 #define nfserr_unknown_layouttype       cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
 267 #define nfserr_seq_misordered           cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
 268 #define nfserr_sequence_pos             cpu_to_be32(NFS4ERR_SEQUENCE_POS)
 269 #define nfserr_req_too_big              cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
 270 #define nfserr_rep_too_big              cpu_to_be32(NFS4ERR_REP_TOO_BIG)
 271 #define nfserr_rep_too_big_to_cache     cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
 272 #define nfserr_retry_uncached_rep       cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
 273 #define nfserr_unsafe_compound          cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
 274 #define nfserr_too_many_ops             cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
 275 #define nfserr_op_not_in_session        cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
 276 #define nfserr_hash_alg_unsupp          cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
 277 #define nfserr_clientid_busy            cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
 278 #define nfserr_pnfs_io_hole             cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
 279 #define nfserr_seq_false_retry          cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
 280 #define nfserr_bad_high_slot            cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
 281 #define nfserr_deadsession              cpu_to_be32(NFS4ERR_DEADSESSION)
 282 #define nfserr_encr_alg_unsupp          cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
 283 #define nfserr_pnfs_no_layout           cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
 284 #define nfserr_not_only_op              cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
 285 #define nfserr_wrong_cred               cpu_to_be32(NFS4ERR_WRONG_CRED)
 286 #define nfserr_wrong_type               cpu_to_be32(NFS4ERR_WRONG_TYPE)
 287 #define nfserr_dirdeleg_unavail         cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
 288 #define nfserr_reject_deleg             cpu_to_be32(NFS4ERR_REJECT_DELEG)
 289 #define nfserr_returnconflict           cpu_to_be32(NFS4ERR_RETURNCONFLICT)
 290 #define nfserr_deleg_revoked            cpu_to_be32(NFS4ERR_DELEG_REVOKED)
 291 #define nfserr_partner_notsupp          cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
 292 #define nfserr_partner_no_auth          cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
 293 #define nfserr_union_notsupp            cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
 294 #define nfserr_offload_denied           cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
 295 #define nfserr_wrong_lfs                cpu_to_be32(NFS4ERR_WRONG_LFS)
 296 #define nfserr_badlabel                 cpu_to_be32(NFS4ERR_BADLABEL)
 297 #define nfserr_file_open                cpu_to_be32(NFS4ERR_FILE_OPEN)
 298 #define nfserr_xattr2big                cpu_to_be32(NFS4ERR_XATTR2BIG)
 299 #define nfserr_noxattr                  cpu_to_be32(NFS4ERR_NOXATTR)
 300
 301 /* error codes for internal use */
 302 /* if a request fails due to kmalloc failure, it gets dropped.
 303  *  Client should resend eventually
 304  */
 305 #define nfserr_dropit           cpu_to_be32(30000)
 306 /* end-of-file indicator in readdir */
 307 #define nfserr_eof              cpu_to_be32(30001)
 308 /* replay detected */
 309 #define nfserr_replay_me        cpu_to_be32(11001)
 310 /* nfs41 replay detected */
 311 #define nfserr_replay_cache     cpu_to_be32(11002)
 312
 313 /* Check for dir entries '.' and '..' */
 314 #define isdotent(n, l)  (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
 315
 316 #ifdef CONFIG_NFSD_V4
 317
 318 /* before processing a COMPOUND operation, we have to check that there
 319  * is enough space in the buffer for XDR encode to succeed.  otherwise,
 320  * we might process an operation with side effects, and be unable to
 321  * tell the client that the operation succeeded.
 322  *
 323  * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
 324  * needed to encode an "ordinary" _successful_ operation.  (GETATTR,
 325  * READ, READDIR, and READLINK have their own buffer checks.)  if we
 326  * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
 327  *
 328  * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
 329  * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
 330  * care is taken to ensure that we never fall below this level for any
 331  * reason.
 332  */
 333 #define COMPOUND_SLACK_SPACE            140    /* OP_GETFH */
 334 #define COMPOUND_ERR_SLACK_SPACE        16     /* OP_SETATTR */
 335
 336 #define NFSD_LAUNDROMAT_MINTIMEOUT      1   /* seconds */
 337
 338 /*
 339  * The following attributes are currently not supported by the NFSv4 server:
 340  *    ARCHIVE       (deprecated anyway)
 341  *    HIDDEN        (unlikely to be supported any time soon)
 342  *    MIMETYPE      (unlikely to be supported any time soon)
 343  *    QUOTA_*       (will be supported in a forthcoming patch)
 344  *    SYSTEM        (unlikely to be supported any time soon)
 345  *    TIME_BACKUP   (unlikely to be supported any time soon)
 346  *    TIME_CREATE   (unlikely to be supported any time soon)
 347  */
 348 #define NFSD4_SUPPORTED_ATTRS_WORD0                                                         \
 349 (FATTR4_WORD0_SUPPORTED_ATTRS   | FATTR4_WORD0_TYPE         | FATTR4_WORD0_FH_EXPIRE_TYPE   \
 350  | FATTR4_WORD0_CHANGE          | FATTR4_WORD0_SIZE         | FATTR4_WORD0_LINK_SUPPORT     \
 351  | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR   | FATTR4_WORD0_FSID             \
 352  | FATTR4_WORD0_UNIQUE_HANDLES  | FATTR4_WORD0_LEASE_TIME   | FATTR4_WORD0_RDATTR_ERROR     \
 353  | FATTR4_WORD0_ACLSUPPORT      | FATTR4_WORD0_CANSETTIME   | FATTR4_WORD0_CASE_INSENSITIVE \
 354  | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED                             \
 355  | FATTR4_WORD0_FILEHANDLE      | FATTR4_WORD0_FILEID       | FATTR4_WORD0_FILES_AVAIL      \
 356  | FATTR4_WORD0_FILES_FREE      | FATTR4_WORD0_FILES_TOTAL  | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS      \
 357  | FATTR4_WORD0_MAXFILESIZE     | FATTR4_WORD0_MAXLINK      | FATTR4_WORD0_MAXNAME          \
 358  | FATTR4_WORD0_MAXREAD         | FATTR4_WORD0_MAXWRITE     | FATTR4_WORD0_ACL)
 359
 360 #define NFSD4_SUPPORTED_ATTRS_WORD1                                                         \
 361 (FATTR4_WORD1_MODE              | FATTR4_WORD1_NO_TRUNC     | FATTR4_WORD1_NUMLINKS         \
 362  | FATTR4_WORD1_OWNER           | FATTR4_WORD1_OWNER_GROUP  | FATTR4_WORD1_RAWDEV           \
 363  | FATTR4_WORD1_SPACE_AVAIL     | FATTR4_WORD1_SPACE_FREE   | FATTR4_WORD1_SPACE_TOTAL      \
 364  | FATTR4_WORD1_SPACE_USED      | FATTR4_WORD1_TIME_ACCESS  | FATTR4_WORD1_TIME_ACCESS_SET  \
 365  | FATTR4_WORD1_TIME_DELTA   | FATTR4_WORD1_TIME_METADATA    \
 366  | FATTR4_WORD1_TIME_MODIFY     | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
 367
 368 #define NFSD4_SUPPORTED_ATTRS_WORD2 0
 369
 370 /* 4.1 */
 371 #ifdef CONFIG_NFSD_PNFS
 372 #define PNFSD_SUPPORTED_ATTRS_WORD1     FATTR4_WORD1_FS_LAYOUT_TYPES
 373 #define PNFSD_SUPPORTED_ATTRS_WORD2 \
 374 (FATTR4_WORD2_LAYOUT_BLKSIZE    | FATTR4_WORD2_LAYOUT_TYPES)
 375 #else
 376 #define PNFSD_SUPPORTED_ATTRS_WORD1     0
 377 #define PNFSD_SUPPORTED_ATTRS_WORD2     0
 378 #endif /* CONFIG_NFSD_PNFS */
 379
 380 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
 381         NFSD4_SUPPORTED_ATTRS_WORD0
 382
 383 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
 384         (NFSD4_SUPPORTED_ATTRS_WORD1    | PNFSD_SUPPORTED_ATTRS_WORD1)
 385
 386 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
 387         (NFSD4_SUPPORTED_ATTRS_WORD2    | PNFSD_SUPPORTED_ATTRS_WORD2 | \
 388          FATTR4_WORD2_SUPPATTR_EXCLCREAT)
 389
 390 /* 4.2 */
 391 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
 392 #define NFSD4_2_SECURITY_ATTRS          FATTR4_WORD2_SECURITY_LABEL
 393 #else
 394 #define NFSD4_2_SECURITY_ATTRS          0
 395 #endif
 396
 397 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
 398         (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
 399         FATTR4_WORD2_MODE_UMASK | \
 400         NFSD4_2_SECURITY_ATTRS | \
 401         FATTR4_WORD2_XATTR_SUPPORT)
 402
 403 extern const u32 nfsd_suppattrs[3][3];
 404
 405 static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr,
 406                                     struct nfs42_netaddr *netaddr)
 407 {
 408         struct sockaddr_in *sin = (struct sockaddr_in *)addr;
 409         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
 410         unsigned int port;
 411         size_t ret_addr, ret_port;
 412
 413         switch (addr->sa_family) {
 414         case AF_INET:
 415                 port = ntohs(sin->sin_port);
 416                 sprintf(netaddr->netid, "tcp");
 417                 netaddr->netid_len = 3;
 418                 break;
 419         case AF_INET6:
 420                 port = ntohs(sin6->sin6_port);
 421                 sprintf(netaddr->netid, "tcp6");
 422                 netaddr->netid_len = 4;
 423                 break;
 424         default:
 425                 return nfserr_inval;
 426         }
 427         ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr));
 428         ret_port = snprintf(netaddr->addr + ret_addr,
 429                             RPCBIND_MAXUADDRLEN + 1 - ret_addr,
 430                             ".%u.%u", port >> 8, port & 0xff);
 431         WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr);
 432         netaddr->addr_len = ret_addr + ret_port;
 433         return 0;
 434 }
 435
 436 static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
 437 {
 438         return !((bm1[0] & ~bm2[0]) ||
 439                  (bm1[1] & ~bm2[1]) ||
 440                  (bm1[2] & ~bm2[2]));
 441 }
 442
 443 static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
 444 {
 445         return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
 446 }
 447
 448 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */
 449 #define NFSD_WRITEONLY_ATTRS_WORD1 \
 450         (FATTR4_WORD1_TIME_ACCESS_SET   | FATTR4_WORD1_TIME_MODIFY_SET)
 451
 452 /*
 453  * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
 454  * a writeable attribute here without also adding code to parse it to
 455  * nfsd4_decode_fattr().
 456  */
 457 #define NFSD_WRITEABLE_ATTRS_WORD0 \
 458         (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
 459 #define NFSD_WRITEABLE_ATTRS_WORD1 \
 460         (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
 461         | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
 462 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
 463 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
 464         FATTR4_WORD2_SECURITY_LABEL
 465 #else
 466 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
 467 #endif
 468 #define NFSD_WRITEABLE_ATTRS_WORD2 \
 469         (FATTR4_WORD2_MODE_UMASK \
 470         | MAYBE_FATTR4_WORD2_SECURITY_LABEL)
 471
 472 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
 473         NFSD_WRITEABLE_ATTRS_WORD0
 474 /*
 475  * we currently store the exclusive create verifier in the v_{a,m}time
 476  * attributes so the client can't set these at create time using EXCLUSIVE4_1
 477  */
 478 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
 479         (NFSD_WRITEABLE_ATTRS_WORD1 & \
 480          ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
 481 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
 482         NFSD_WRITEABLE_ATTRS_WORD2
 483
 484 extern int nfsd4_is_junction(struct dentry *dentry);
 485 extern int register_cld_notifier(void);
 486 extern void unregister_cld_notifier(void);
 487 #ifdef CONFIG_NFSD_V4_2_INTER_SSC
 488 extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn);
 489 #endif
 490
 491 #else /* CONFIG_NFSD_V4 */
 492 static inline int nfsd4_is_junction(struct dentry *dentry)
 493 {
 494         return 0;
 495 }
 496
 497 #define register_cld_notifier() 0
 498 #define unregister_cld_notifier() do { } while(0)
 499
 500 #endif /* CONFIG_NFSD_V4 */
 501
 502 #endif /* LINUX_NFSD_NFSD_H */