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TOMOYO Linux Cross Reference
Linux/fs/nfsd/nfsd.h

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  1 /*
  2  * Hodge-podge collection of knfsd-related stuff.
  3  * I will sort this out later.
  4  *
  5  * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
  6  */
  7 
  8 #ifndef LINUX_NFSD_NFSD_H
  9 #define LINUX_NFSD_NFSD_H
 10 
 11 #include <linux/types.h>
 12 #include <linux/mount.h>
 13 
 14 #include <linux/nfs.h>
 15 #include <linux/nfs2.h>
 16 #include <linux/nfs3.h>
 17 #include <linux/nfs4.h>
 18 #include <linux/sunrpc/svc.h>
 19 #include <linux/sunrpc/msg_prot.h>
 20 
 21 #include <uapi/linux/nfsd/debug.h>
 22 
 23 #include "stats.h"
 24 #include "export.h"
 25 
 26 #undef ifdebug
 27 #ifdef CONFIG_SUNRPC_DEBUG
 28 # define ifdebug(flag)          if (nfsd_debug & NFSDDBG_##flag)
 29 #else
 30 # define ifdebug(flag)          if (0)
 31 #endif
 32 
 33 /*
 34  * nfsd version
 35  */
 36 #define NFSD_SUPPORTED_MINOR_VERSION    2
 37 /*
 38  * Maximum blocksizes supported by daemon under various circumstances.
 39  */
 40 #define NFSSVC_MAXBLKSIZE       RPCSVC_MAXPAYLOAD
 41 /* NFSv2 is limited by the protocol specification, see RFC 1094 */
 42 #define NFSSVC_MAXBLKSIZE_V2    (8*1024)
 43 
 44 
 45 /*
 46  * Largest number of bytes we need to allocate for an NFS
 47  * call or reply.  Used to control buffer sizes.  We use
 48  * the length of v3 WRITE, READDIR and READDIR replies
 49  * which are an RPC header, up to 26 XDR units of reply
 50  * data, and some page data.
 51  *
 52  * Note that accuracy here doesn't matter too much as the
 53  * size is rounded up to a page size when allocating space.
 54  */
 55 #define NFSD_BUFSIZE            ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
 56 
 57 struct readdir_cd {
 58         __be32                  err;    /* 0, nfserr, or nfserr_eof */
 59 };
 60 
 61 
 62 extern struct svc_program       nfsd_program;
 63 extern struct svc_version       nfsd_version2, nfsd_version3,
 64                                 nfsd_version4;
 65 extern struct mutex             nfsd_mutex;
 66 extern spinlock_t               nfsd_drc_lock;
 67 extern unsigned long            nfsd_drc_max_mem;
 68 extern unsigned long            nfsd_drc_mem_used;
 69 
 70 extern const struct seq_operations nfs_exports_op;
 71 
 72 /*
 73  * Function prototypes.
 74  */
 75 int             nfsd_svc(int nrservs, struct net *net);
 76 int             nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
 77 
 78 int             nfsd_nrthreads(struct net *);
 79 int             nfsd_nrpools(struct net *);
 80 int             nfsd_get_nrthreads(int n, int *, struct net *);
 81 int             nfsd_set_nrthreads(int n, int *, struct net *);
 82 int             nfsd_pool_stats_open(struct inode *, struct file *);
 83 int             nfsd_pool_stats_release(struct inode *, struct file *);
 84 
 85 void            nfsd_destroy(struct net *net);
 86 
 87 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
 88 #ifdef CONFIG_NFSD_V2_ACL
 89 extern struct svc_version nfsd_acl_version2;
 90 #else
 91 #define nfsd_acl_version2 NULL
 92 #endif
 93 #ifdef CONFIG_NFSD_V3_ACL
 94 extern struct svc_version nfsd_acl_version3;
 95 #else
 96 #define nfsd_acl_version3 NULL
 97 #endif
 98 #endif
 99 
100 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
101 int nfsd_vers(int vers, enum vers_op change);
102 int nfsd_minorversion(u32 minorversion, enum vers_op change);
103 void nfsd_reset_versions(void);
104 int nfsd_create_serv(struct net *net);
105 
106 extern int nfsd_max_blksize;
107 
108 static inline int nfsd_v4client(struct svc_rqst *rq)
109 {
110         return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
111 }
112 
113 /* 
114  * NFSv4 State
115  */
116 #ifdef CONFIG_NFSD_V4
117 extern unsigned long max_delegations;
118 int nfsd4_init_slabs(void);
119 void nfsd4_free_slabs(void);
120 int nfs4_state_start(void);
121 int nfs4_state_start_net(struct net *net);
122 void nfs4_state_shutdown(void);
123 void nfs4_state_shutdown_net(struct net *net);
124 void nfs4_reset_lease(time_t leasetime);
125 int nfs4_reset_recoverydir(char *recdir);
126 char * nfs4_recoverydir(void);
127 #else
128 static inline int nfsd4_init_slabs(void) { return 0; }
129 static inline void nfsd4_free_slabs(void) { }
130 static inline int nfs4_state_start(void) { return 0; }
131 static inline int nfs4_state_start_net(struct net *net) { return 0; }
132 static inline void nfs4_state_shutdown(void) { }
133 static inline void nfs4_state_shutdown_net(struct net *net) { }
134 static inline void nfs4_reset_lease(time_t leasetime) { }
135 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
136 static inline char * nfs4_recoverydir(void) {return NULL; }
137 #endif
138 
139 /*
140  * lockd binding
141  */
142 void            nfsd_lockd_init(void);
143 void            nfsd_lockd_shutdown(void);
144 
145 
146 /*
147  * These macros provide pre-xdr'ed values for faster operation.
148  */
149 #define nfs_ok                  cpu_to_be32(NFS_OK)
150 #define nfserr_perm             cpu_to_be32(NFSERR_PERM)
151 #define nfserr_noent            cpu_to_be32(NFSERR_NOENT)
152 #define nfserr_io               cpu_to_be32(NFSERR_IO)
153 #define nfserr_nxio             cpu_to_be32(NFSERR_NXIO)
154 #define nfserr_eagain           cpu_to_be32(NFSERR_EAGAIN)
155 #define nfserr_acces            cpu_to_be32(NFSERR_ACCES)
156 #define nfserr_exist            cpu_to_be32(NFSERR_EXIST)
157 #define nfserr_xdev             cpu_to_be32(NFSERR_XDEV)
158 #define nfserr_nodev            cpu_to_be32(NFSERR_NODEV)
159 #define nfserr_notdir           cpu_to_be32(NFSERR_NOTDIR)
160 #define nfserr_isdir            cpu_to_be32(NFSERR_ISDIR)
161 #define nfserr_inval            cpu_to_be32(NFSERR_INVAL)
162 #define nfserr_fbig             cpu_to_be32(NFSERR_FBIG)
163 #define nfserr_nospc            cpu_to_be32(NFSERR_NOSPC)
164 #define nfserr_rofs             cpu_to_be32(NFSERR_ROFS)
165 #define nfserr_mlink            cpu_to_be32(NFSERR_MLINK)
166 #define nfserr_opnotsupp        cpu_to_be32(NFSERR_OPNOTSUPP)
167 #define nfserr_nametoolong      cpu_to_be32(NFSERR_NAMETOOLONG)
168 #define nfserr_notempty         cpu_to_be32(NFSERR_NOTEMPTY)
169 #define nfserr_dquot            cpu_to_be32(NFSERR_DQUOT)
170 #define nfserr_stale            cpu_to_be32(NFSERR_STALE)
171 #define nfserr_remote           cpu_to_be32(NFSERR_REMOTE)
172 #define nfserr_wflush           cpu_to_be32(NFSERR_WFLUSH)
173 #define nfserr_badhandle        cpu_to_be32(NFSERR_BADHANDLE)
174 #define nfserr_notsync          cpu_to_be32(NFSERR_NOT_SYNC)
175 #define nfserr_badcookie        cpu_to_be32(NFSERR_BAD_COOKIE)
176 #define nfserr_notsupp          cpu_to_be32(NFSERR_NOTSUPP)
177 #define nfserr_toosmall         cpu_to_be32(NFSERR_TOOSMALL)
178 #define nfserr_serverfault      cpu_to_be32(NFSERR_SERVERFAULT)
179 #define nfserr_badtype          cpu_to_be32(NFSERR_BADTYPE)
180 #define nfserr_jukebox          cpu_to_be32(NFSERR_JUKEBOX)
181 #define nfserr_denied           cpu_to_be32(NFSERR_DENIED)
182 #define nfserr_deadlock         cpu_to_be32(NFSERR_DEADLOCK)
183 #define nfserr_expired          cpu_to_be32(NFSERR_EXPIRED)
184 #define nfserr_bad_cookie       cpu_to_be32(NFSERR_BAD_COOKIE)
185 #define nfserr_same             cpu_to_be32(NFSERR_SAME)
186 #define nfserr_clid_inuse       cpu_to_be32(NFSERR_CLID_INUSE)
187 #define nfserr_stale_clientid   cpu_to_be32(NFSERR_STALE_CLIENTID)
188 #define nfserr_resource         cpu_to_be32(NFSERR_RESOURCE)
189 #define nfserr_moved            cpu_to_be32(NFSERR_MOVED)
190 #define nfserr_nofilehandle     cpu_to_be32(NFSERR_NOFILEHANDLE)
191 #define nfserr_minor_vers_mismatch      cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
192 #define nfserr_share_denied     cpu_to_be32(NFSERR_SHARE_DENIED)
193 #define nfserr_stale_stateid    cpu_to_be32(NFSERR_STALE_STATEID)
194 #define nfserr_old_stateid      cpu_to_be32(NFSERR_OLD_STATEID)
195 #define nfserr_bad_stateid      cpu_to_be32(NFSERR_BAD_STATEID)
196 #define nfserr_bad_seqid        cpu_to_be32(NFSERR_BAD_SEQID)
197 #define nfserr_symlink          cpu_to_be32(NFSERR_SYMLINK)
198 #define nfserr_not_same         cpu_to_be32(NFSERR_NOT_SAME)
199 #define nfserr_lock_range       cpu_to_be32(NFSERR_LOCK_RANGE)
200 #define nfserr_restorefh        cpu_to_be32(NFSERR_RESTOREFH)
201 #define nfserr_attrnotsupp      cpu_to_be32(NFSERR_ATTRNOTSUPP)
202 #define nfserr_bad_xdr          cpu_to_be32(NFSERR_BAD_XDR)
203 #define nfserr_openmode         cpu_to_be32(NFSERR_OPENMODE)
204 #define nfserr_badowner         cpu_to_be32(NFSERR_BADOWNER)
205 #define nfserr_locks_held       cpu_to_be32(NFSERR_LOCKS_HELD)
206 #define nfserr_op_illegal       cpu_to_be32(NFSERR_OP_ILLEGAL)
207 #define nfserr_grace            cpu_to_be32(NFSERR_GRACE)
208 #define nfserr_no_grace         cpu_to_be32(NFSERR_NO_GRACE)
209 #define nfserr_reclaim_bad      cpu_to_be32(NFSERR_RECLAIM_BAD)
210 #define nfserr_badname          cpu_to_be32(NFSERR_BADNAME)
211 #define nfserr_cb_path_down     cpu_to_be32(NFSERR_CB_PATH_DOWN)
212 #define nfserr_locked           cpu_to_be32(NFSERR_LOCKED)
213 #define nfserr_wrongsec         cpu_to_be32(NFSERR_WRONGSEC)
214 #define nfserr_badiomode                cpu_to_be32(NFS4ERR_BADIOMODE)
215 #define nfserr_badlayout                cpu_to_be32(NFS4ERR_BADLAYOUT)
216 #define nfserr_bad_session_digest       cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
217 #define nfserr_badsession               cpu_to_be32(NFS4ERR_BADSESSION)
218 #define nfserr_badslot                  cpu_to_be32(NFS4ERR_BADSLOT)
219 #define nfserr_complete_already         cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
220 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
221 #define nfserr_deleg_already_wanted     cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
222 #define nfserr_back_chan_busy           cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
223 #define nfserr_layouttrylater           cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
224 #define nfserr_layoutunavailable        cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
225 #define nfserr_nomatching_layout        cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
226 #define nfserr_recallconflict           cpu_to_be32(NFS4ERR_RECALLCONFLICT)
227 #define nfserr_unknown_layouttype       cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
228 #define nfserr_seq_misordered           cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
229 #define nfserr_sequence_pos             cpu_to_be32(NFS4ERR_SEQUENCE_POS)
230 #define nfserr_req_too_big              cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
231 #define nfserr_rep_too_big              cpu_to_be32(NFS4ERR_REP_TOO_BIG)
232 #define nfserr_rep_too_big_to_cache     cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
233 #define nfserr_retry_uncached_rep       cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
234 #define nfserr_unsafe_compound          cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
235 #define nfserr_too_many_ops             cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
236 #define nfserr_op_not_in_session        cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
237 #define nfserr_hash_alg_unsupp          cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
238 #define nfserr_clientid_busy            cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
239 #define nfserr_pnfs_io_hole             cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
240 #define nfserr_seq_false_retry          cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
241 #define nfserr_bad_high_slot            cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
242 #define nfserr_deadsession              cpu_to_be32(NFS4ERR_DEADSESSION)
243 #define nfserr_encr_alg_unsupp          cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
244 #define nfserr_pnfs_no_layout           cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
245 #define nfserr_not_only_op              cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
246 #define nfserr_wrong_cred               cpu_to_be32(NFS4ERR_WRONG_CRED)
247 #define nfserr_wrong_type               cpu_to_be32(NFS4ERR_WRONG_TYPE)
248 #define nfserr_dirdeleg_unavail         cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
249 #define nfserr_reject_deleg             cpu_to_be32(NFS4ERR_REJECT_DELEG)
250 #define nfserr_returnconflict           cpu_to_be32(NFS4ERR_RETURNCONFLICT)
251 #define nfserr_deleg_revoked            cpu_to_be32(NFS4ERR_DELEG_REVOKED)
252 #define nfserr_partner_notsupp          cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
253 #define nfserr_partner_no_auth          cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
254 #define nfserr_union_notsupp            cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
255 #define nfserr_offload_denied           cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
256 #define nfserr_wrong_lfs                cpu_to_be32(NFS4ERR_WRONG_LFS)
257 #define nfserr_badlabel         cpu_to_be32(NFS4ERR_BADLABEL)
258 
259 /* error codes for internal use */
260 /* if a request fails due to kmalloc failure, it gets dropped.
261  *  Client should resend eventually
262  */
263 #define nfserr_dropit           cpu_to_be32(30000)
264 /* end-of-file indicator in readdir */
265 #define nfserr_eof              cpu_to_be32(30001)
266 /* replay detected */
267 #define nfserr_replay_me        cpu_to_be32(11001)
268 /* nfs41 replay detected */
269 #define nfserr_replay_cache     cpu_to_be32(11002)
270 
271 /* Check for dir entries '.' and '..' */
272 #define isdotent(n, l)  (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
273 
274 #ifdef CONFIG_NFSD_V4
275 
276 /* before processing a COMPOUND operation, we have to check that there
277  * is enough space in the buffer for XDR encode to succeed.  otherwise,
278  * we might process an operation with side effects, and be unable to
279  * tell the client that the operation succeeded.
280  *
281  * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
282  * needed to encode an "ordinary" _successful_ operation.  (GETATTR,
283  * READ, READDIR, and READLINK have their own buffer checks.)  if we
284  * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
285  *
286  * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
287  * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
288  * care is taken to ensure that we never fall below this level for any
289  * reason.
290  */
291 #define COMPOUND_SLACK_SPACE            140    /* OP_GETFH */
292 #define COMPOUND_ERR_SLACK_SPACE        16     /* OP_SETATTR */
293 
294 #define NFSD_LAUNDROMAT_MINTIMEOUT      1   /* seconds */
295 
296 /*
297  * The following attributes are currently not supported by the NFSv4 server:
298  *    ARCHIVE       (deprecated anyway)
299  *    HIDDEN        (unlikely to be supported any time soon)
300  *    MIMETYPE      (unlikely to be supported any time soon)
301  *    QUOTA_*       (will be supported in a forthcoming patch)
302  *    SYSTEM        (unlikely to be supported any time soon)
303  *    TIME_BACKUP   (unlikely to be supported any time soon)
304  *    TIME_CREATE   (unlikely to be supported any time soon)
305  */
306 #define NFSD4_SUPPORTED_ATTRS_WORD0                                                         \
307 (FATTR4_WORD0_SUPPORTED_ATTRS   | FATTR4_WORD0_TYPE         | FATTR4_WORD0_FH_EXPIRE_TYPE   \
308  | FATTR4_WORD0_CHANGE          | FATTR4_WORD0_SIZE         | FATTR4_WORD0_LINK_SUPPORT     \
309  | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR   | FATTR4_WORD0_FSID             \
310  | FATTR4_WORD0_UNIQUE_HANDLES  | FATTR4_WORD0_LEASE_TIME   | FATTR4_WORD0_RDATTR_ERROR     \
311  | FATTR4_WORD0_ACLSUPPORT      | FATTR4_WORD0_CANSETTIME   | FATTR4_WORD0_CASE_INSENSITIVE \
312  | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED                             \
313  | FATTR4_WORD0_FILEHANDLE      | FATTR4_WORD0_FILEID       | FATTR4_WORD0_FILES_AVAIL      \
314  | FATTR4_WORD0_FILES_FREE      | FATTR4_WORD0_FILES_TOTAL  | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS      \
315  | FATTR4_WORD0_MAXFILESIZE     | FATTR4_WORD0_MAXLINK      | FATTR4_WORD0_MAXNAME          \
316  | FATTR4_WORD0_MAXREAD         | FATTR4_WORD0_MAXWRITE     | FATTR4_WORD0_ACL)
317 
318 #define NFSD4_SUPPORTED_ATTRS_WORD1                                                         \
319 (FATTR4_WORD1_MODE              | FATTR4_WORD1_NO_TRUNC     | FATTR4_WORD1_NUMLINKS         \
320  | FATTR4_WORD1_OWNER           | FATTR4_WORD1_OWNER_GROUP  | FATTR4_WORD1_RAWDEV           \
321  | FATTR4_WORD1_SPACE_AVAIL     | FATTR4_WORD1_SPACE_FREE   | FATTR4_WORD1_SPACE_TOTAL      \
322  | FATTR4_WORD1_SPACE_USED      | FATTR4_WORD1_TIME_ACCESS  | FATTR4_WORD1_TIME_ACCESS_SET  \
323  | FATTR4_WORD1_TIME_DELTA   | FATTR4_WORD1_TIME_METADATA    \
324  | FATTR4_WORD1_TIME_MODIFY     | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
325 
326 #define NFSD4_SUPPORTED_ATTRS_WORD2 0
327 
328 /* 4.1 */
329 #ifdef CONFIG_NFSD_PNFS
330 #define PNFSD_SUPPORTED_ATTRS_WORD1     FATTR4_WORD1_FS_LAYOUT_TYPES
331 #define PNFSD_SUPPORTED_ATTRS_WORD2 \
332 (FATTR4_WORD2_LAYOUT_BLKSIZE    | FATTR4_WORD2_LAYOUT_TYPES)
333 #else
334 #define PNFSD_SUPPORTED_ATTRS_WORD1     0
335 #define PNFSD_SUPPORTED_ATTRS_WORD2     0
336 #endif /* CONFIG_NFSD_PNFS */
337 
338 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
339         NFSD4_SUPPORTED_ATTRS_WORD0
340 
341 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
342         (NFSD4_SUPPORTED_ATTRS_WORD1    | PNFSD_SUPPORTED_ATTRS_WORD1)
343 
344 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
345         (NFSD4_SUPPORTED_ATTRS_WORD2    | PNFSD_SUPPORTED_ATTRS_WORD2 | \
346          FATTR4_WORD2_SUPPATTR_EXCLCREAT)
347 
348 /* 4.2 */
349 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
350 #define NFSD4_2_SECURITY_ATTRS          FATTR4_WORD2_SECURITY_LABEL
351 #else
352 #define NFSD4_2_SECURITY_ATTRS          0
353 #endif
354 
355 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
356         (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
357         NFSD4_2_SECURITY_ATTRS)
358 
359 static inline u32 nfsd_suppattrs0(u32 minorversion)
360 {
361         return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD0
362                             : NFSD4_SUPPORTED_ATTRS_WORD0;
363 }
364 
365 static inline u32 nfsd_suppattrs1(u32 minorversion)
366 {
367         return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD1
368                             : NFSD4_SUPPORTED_ATTRS_WORD1;
369 }
370 
371 static inline u32 nfsd_suppattrs2(u32 minorversion)
372 {
373         switch (minorversion) {
374         default: return NFSD4_2_SUPPORTED_ATTRS_WORD2;
375         case 1:  return NFSD4_1_SUPPORTED_ATTRS_WORD2;
376         case 0:  return NFSD4_SUPPORTED_ATTRS_WORD2;
377         }
378 }
379 
380 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */
381 #define NFSD_WRITEONLY_ATTRS_WORD1 \
382         (FATTR4_WORD1_TIME_ACCESS_SET   | FATTR4_WORD1_TIME_MODIFY_SET)
383 
384 /* These are the only attrs allowed in CREATE/OPEN/SETATTR. */
385 #define NFSD_WRITEABLE_ATTRS_WORD0 \
386         (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
387 #define NFSD_WRITEABLE_ATTRS_WORD1 \
388         (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
389         | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
390 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
391 #define NFSD_WRITEABLE_ATTRS_WORD2 FATTR4_WORD2_SECURITY_LABEL
392 #else
393 #define NFSD_WRITEABLE_ATTRS_WORD2 0
394 #endif
395 
396 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
397         NFSD_WRITEABLE_ATTRS_WORD0
398 /*
399  * we currently store the exclusive create verifier in the v_{a,m}time
400  * attributes so the client can't set these at create time using EXCLUSIVE4_1
401  */
402 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
403         (NFSD_WRITEABLE_ATTRS_WORD1 & \
404          ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
405 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
406         NFSD_WRITEABLE_ATTRS_WORD2
407 
408 extern int nfsd4_is_junction(struct dentry *dentry);
409 extern int register_cld_notifier(void);
410 extern void unregister_cld_notifier(void);
411 #else /* CONFIG_NFSD_V4 */
412 static inline int nfsd4_is_junction(struct dentry *dentry)
413 {
414         return 0;
415 }
416 
417 #define register_cld_notifier() 0
418 #define unregister_cld_notifier() do { } while(0)
419 
420 #endif /* CONFIG_NFSD_V4 */
421 
422 #endif /* LINUX_NFSD_NFSD_H */
423 

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