xref: /openbmc/linux/fs/nfsd/nfsd.h (revision cf26e043)
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, nfsd_version4;
68  extern struct mutex		nfsd_mutex;
69  extern spinlock_t		nfsd_drc_lock;
70  extern unsigned long		nfsd_drc_max_mem;
71  extern unsigned long		nfsd_drc_mem_used;
72  
73  extern const struct seq_operations nfs_exports_op;
74  
75  /*
76   * Common void argument and result helpers
77   */
78  struct nfsd_voidargs { };
79  struct nfsd_voidres { };
80  bool		nfssvc_decode_voidarg(struct svc_rqst *rqstp,
81  				      struct xdr_stream *xdr);
82  bool		nfssvc_encode_voidres(struct svc_rqst *rqstp,
83  				      struct xdr_stream *xdr);
84  
85  /*
86   * Function prototypes.
87   */
88  int		nfsd_svc(int nrservs, struct net *net, const struct cred *cred);
89  int		nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
90  
91  int		nfsd_nrthreads(struct net *);
92  int		nfsd_nrpools(struct net *);
93  int		nfsd_get_nrthreads(int n, int *, struct net *);
94  int		nfsd_set_nrthreads(int n, int *, struct net *);
95  int		nfsd_pool_stats_open(struct inode *, struct file *);
96  int		nfsd_pool_stats_release(struct inode *, struct file *);
97  void		nfsd_shutdown_threads(struct net *net);
98  
99  void		nfsd_put(struct net *net);
100  
101  bool		i_am_nfsd(void);
102  
103  struct nfsdfs_client {
104  	struct kref cl_ref;
105  	void (*cl_release)(struct kref *kref);
106  };
107  
108  struct nfsdfs_client *get_nfsdfs_client(struct inode *);
109  struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
110  				 struct nfsdfs_client *ncl, u32 id,
111  				 const struct tree_descr *,
112  				 struct dentry **fdentries);
113  void nfsd_client_rmdir(struct dentry *dentry);
114  
115  
116  #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
117  #ifdef CONFIG_NFSD_V2_ACL
118  extern const struct svc_version nfsd_acl_version2;
119  #else
120  #define nfsd_acl_version2 NULL
121  #endif
122  #ifdef CONFIG_NFSD_V3_ACL
123  extern const struct svc_version nfsd_acl_version3;
124  #else
125  #define nfsd_acl_version3 NULL
126  #endif
127  #endif
128  
129  struct nfsd_net;
130  
131  enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
132  int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
133  int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
134  void nfsd_reset_versions(struct nfsd_net *nn);
135  int nfsd_create_serv(struct net *net);
136  
137  extern int nfsd_max_blksize;
138  
139  static inline int nfsd_v4client(struct svc_rqst *rq)
140  {
141  	return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
142  }
143  static inline struct user_namespace *
144  nfsd_user_namespace(const struct svc_rqst *rqstp)
145  {
146  	const struct cred *cred = rqstp->rq_xprt->xpt_cred;
147  	return cred ? cred->user_ns : &init_user_ns;
148  }
149  
150  /*
151   * NFSv4 State
152   */
153  #ifdef CONFIG_NFSD_V4
154  extern unsigned long max_delegations;
155  int nfsd4_init_slabs(void);
156  void nfsd4_free_slabs(void);
157  int nfs4_state_start(void);
158  int nfs4_state_start_net(struct net *net);
159  void nfs4_state_shutdown(void);
160  void nfs4_state_shutdown_net(struct net *net);
161  int nfs4_reset_recoverydir(char *recdir);
162  char * nfs4_recoverydir(void);
163  bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
164  int nfsd4_create_laundry_wq(void);
165  void nfsd4_destroy_laundry_wq(void);
166  bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode);
167  #else
168  static inline int nfsd4_init_slabs(void) { return 0; }
169  static inline void nfsd4_free_slabs(void) { }
170  static inline int nfs4_state_start(void) { return 0; }
171  static inline int nfs4_state_start_net(struct net *net) { return 0; }
172  static inline void nfs4_state_shutdown(void) { }
173  static inline void nfs4_state_shutdown_net(struct net *net) { }
174  static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
175  static inline char * nfs4_recoverydir(void) {return NULL; }
176  static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
177  {
178  	return false;
179  }
180  static inline int nfsd4_create_laundry_wq(void) { return 0; };
181  static inline void nfsd4_destroy_laundry_wq(void) {};
182  static inline bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp,
183  					      struct inode *inode)
184  {
185  	return false;
186  }
187  #endif
188  
189  /*
190   * lockd binding
191   */
192  void		nfsd_lockd_init(void);
193  void		nfsd_lockd_shutdown(void);
194  
195  
196  /*
197   * These macros provide pre-xdr'ed values for faster operation.
198   */
199  #define	nfs_ok			cpu_to_be32(NFS_OK)
200  #define	nfserr_perm		cpu_to_be32(NFSERR_PERM)
201  #define	nfserr_noent		cpu_to_be32(NFSERR_NOENT)
202  #define	nfserr_io		cpu_to_be32(NFSERR_IO)
203  #define	nfserr_nxio		cpu_to_be32(NFSERR_NXIO)
204  #define	nfserr_eagain		cpu_to_be32(NFSERR_EAGAIN)
205  #define	nfserr_acces		cpu_to_be32(NFSERR_ACCES)
206  #define	nfserr_exist		cpu_to_be32(NFSERR_EXIST)
207  #define	nfserr_xdev		cpu_to_be32(NFSERR_XDEV)
208  #define	nfserr_nodev		cpu_to_be32(NFSERR_NODEV)
209  #define	nfserr_notdir		cpu_to_be32(NFSERR_NOTDIR)
210  #define	nfserr_isdir		cpu_to_be32(NFSERR_ISDIR)
211  #define	nfserr_inval		cpu_to_be32(NFSERR_INVAL)
212  #define	nfserr_fbig		cpu_to_be32(NFSERR_FBIG)
213  #define	nfserr_nospc		cpu_to_be32(NFSERR_NOSPC)
214  #define	nfserr_rofs		cpu_to_be32(NFSERR_ROFS)
215  #define	nfserr_mlink		cpu_to_be32(NFSERR_MLINK)
216  #define	nfserr_opnotsupp	cpu_to_be32(NFSERR_OPNOTSUPP)
217  #define	nfserr_nametoolong	cpu_to_be32(NFSERR_NAMETOOLONG)
218  #define	nfserr_notempty		cpu_to_be32(NFSERR_NOTEMPTY)
219  #define	nfserr_dquot		cpu_to_be32(NFSERR_DQUOT)
220  #define	nfserr_stale		cpu_to_be32(NFSERR_STALE)
221  #define	nfserr_remote		cpu_to_be32(NFSERR_REMOTE)
222  #define	nfserr_wflush		cpu_to_be32(NFSERR_WFLUSH)
223  #define	nfserr_badhandle	cpu_to_be32(NFSERR_BADHANDLE)
224  #define	nfserr_notsync		cpu_to_be32(NFSERR_NOT_SYNC)
225  #define	nfserr_badcookie	cpu_to_be32(NFSERR_BAD_COOKIE)
226  #define	nfserr_notsupp		cpu_to_be32(NFSERR_NOTSUPP)
227  #define	nfserr_toosmall		cpu_to_be32(NFSERR_TOOSMALL)
228  #define	nfserr_serverfault	cpu_to_be32(NFSERR_SERVERFAULT)
229  #define	nfserr_badtype		cpu_to_be32(NFSERR_BADTYPE)
230  #define	nfserr_jukebox		cpu_to_be32(NFSERR_JUKEBOX)
231  #define	nfserr_denied		cpu_to_be32(NFSERR_DENIED)
232  #define	nfserr_deadlock		cpu_to_be32(NFSERR_DEADLOCK)
233  #define nfserr_expired          cpu_to_be32(NFSERR_EXPIRED)
234  #define	nfserr_bad_cookie	cpu_to_be32(NFSERR_BAD_COOKIE)
235  #define	nfserr_same		cpu_to_be32(NFSERR_SAME)
236  #define	nfserr_clid_inuse	cpu_to_be32(NFSERR_CLID_INUSE)
237  #define	nfserr_stale_clientid	cpu_to_be32(NFSERR_STALE_CLIENTID)
238  #define	nfserr_resource		cpu_to_be32(NFSERR_RESOURCE)
239  #define	nfserr_moved		cpu_to_be32(NFSERR_MOVED)
240  #define	nfserr_nofilehandle	cpu_to_be32(NFSERR_NOFILEHANDLE)
241  #define	nfserr_minor_vers_mismatch	cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
242  #define nfserr_share_denied	cpu_to_be32(NFSERR_SHARE_DENIED)
243  #define nfserr_stale_stateid	cpu_to_be32(NFSERR_STALE_STATEID)
244  #define nfserr_old_stateid	cpu_to_be32(NFSERR_OLD_STATEID)
245  #define nfserr_bad_stateid	cpu_to_be32(NFSERR_BAD_STATEID)
246  #define nfserr_bad_seqid	cpu_to_be32(NFSERR_BAD_SEQID)
247  #define	nfserr_symlink		cpu_to_be32(NFSERR_SYMLINK)
248  #define	nfserr_not_same		cpu_to_be32(NFSERR_NOT_SAME)
249  #define nfserr_lock_range	cpu_to_be32(NFSERR_LOCK_RANGE)
250  #define	nfserr_restorefh	cpu_to_be32(NFSERR_RESTOREFH)
251  #define	nfserr_attrnotsupp	cpu_to_be32(NFSERR_ATTRNOTSUPP)
252  #define	nfserr_bad_xdr		cpu_to_be32(NFSERR_BAD_XDR)
253  #define	nfserr_openmode		cpu_to_be32(NFSERR_OPENMODE)
254  #define	nfserr_badowner		cpu_to_be32(NFSERR_BADOWNER)
255  #define	nfserr_locks_held	cpu_to_be32(NFSERR_LOCKS_HELD)
256  #define	nfserr_op_illegal	cpu_to_be32(NFSERR_OP_ILLEGAL)
257  #define	nfserr_grace		cpu_to_be32(NFSERR_GRACE)
258  #define	nfserr_no_grace		cpu_to_be32(NFSERR_NO_GRACE)
259  #define	nfserr_reclaim_bad	cpu_to_be32(NFSERR_RECLAIM_BAD)
260  #define	nfserr_badname		cpu_to_be32(NFSERR_BADNAME)
261  #define	nfserr_cb_path_down	cpu_to_be32(NFSERR_CB_PATH_DOWN)
262  #define	nfserr_locked		cpu_to_be32(NFSERR_LOCKED)
263  #define	nfserr_wrongsec		cpu_to_be32(NFSERR_WRONGSEC)
264  #define nfserr_badiomode		cpu_to_be32(NFS4ERR_BADIOMODE)
265  #define nfserr_badlayout		cpu_to_be32(NFS4ERR_BADLAYOUT)
266  #define nfserr_bad_session_digest	cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
267  #define nfserr_badsession		cpu_to_be32(NFS4ERR_BADSESSION)
268  #define nfserr_badslot			cpu_to_be32(NFS4ERR_BADSLOT)
269  #define nfserr_complete_already		cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
270  #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
271  #define nfserr_deleg_already_wanted	cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
272  #define nfserr_back_chan_busy		cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
273  #define nfserr_layouttrylater		cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
274  #define nfserr_layoutunavailable	cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
275  #define nfserr_nomatching_layout	cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
276  #define nfserr_recallconflict		cpu_to_be32(NFS4ERR_RECALLCONFLICT)
277  #define nfserr_unknown_layouttype	cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
278  #define nfserr_seq_misordered		cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
279  #define nfserr_sequence_pos		cpu_to_be32(NFS4ERR_SEQUENCE_POS)
280  #define nfserr_req_too_big		cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
281  #define nfserr_rep_too_big		cpu_to_be32(NFS4ERR_REP_TOO_BIG)
282  #define nfserr_rep_too_big_to_cache	cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
283  #define nfserr_retry_uncached_rep	cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
284  #define nfserr_unsafe_compound		cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
285  #define nfserr_too_many_ops		cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
286  #define nfserr_op_not_in_session	cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
287  #define nfserr_hash_alg_unsupp		cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
288  #define nfserr_clientid_busy		cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
289  #define nfserr_pnfs_io_hole		cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
290  #define nfserr_seq_false_retry		cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
291  #define nfserr_bad_high_slot		cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
292  #define nfserr_deadsession		cpu_to_be32(NFS4ERR_DEADSESSION)
293  #define nfserr_encr_alg_unsupp		cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
294  #define nfserr_pnfs_no_layout		cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
295  #define nfserr_not_only_op		cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
296  #define nfserr_wrong_cred		cpu_to_be32(NFS4ERR_WRONG_CRED)
297  #define nfserr_wrong_type		cpu_to_be32(NFS4ERR_WRONG_TYPE)
298  #define nfserr_dirdeleg_unavail		cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
299  #define nfserr_reject_deleg		cpu_to_be32(NFS4ERR_REJECT_DELEG)
300  #define nfserr_returnconflict		cpu_to_be32(NFS4ERR_RETURNCONFLICT)
301  #define nfserr_deleg_revoked		cpu_to_be32(NFS4ERR_DELEG_REVOKED)
302  #define nfserr_partner_notsupp		cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
303  #define nfserr_partner_no_auth		cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
304  #define nfserr_union_notsupp		cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
305  #define nfserr_offload_denied		cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
306  #define nfserr_wrong_lfs		cpu_to_be32(NFS4ERR_WRONG_LFS)
307  #define nfserr_badlabel			cpu_to_be32(NFS4ERR_BADLABEL)
308  #define nfserr_file_open		cpu_to_be32(NFS4ERR_FILE_OPEN)
309  #define nfserr_xattr2big		cpu_to_be32(NFS4ERR_XATTR2BIG)
310  #define nfserr_noxattr			cpu_to_be32(NFS4ERR_NOXATTR)
311  
312  /* error codes for internal use */
313  /* if a request fails due to kmalloc failure, it gets dropped.
314   *  Client should resend eventually
315   */
316  #define	nfserr_dropit		cpu_to_be32(30000)
317  /* end-of-file indicator in readdir */
318  #define	nfserr_eof		cpu_to_be32(30001)
319  /* replay detected */
320  #define	nfserr_replay_me	cpu_to_be32(11001)
321  /* nfs41 replay detected */
322  #define	nfserr_replay_cache	cpu_to_be32(11002)
323  
324  /* Check for dir entries '.' and '..' */
325  #define isdotent(n, l)	(l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
326  
327  #ifdef CONFIG_NFSD_V4
328  
329  /* before processing a COMPOUND operation, we have to check that there
330   * is enough space in the buffer for XDR encode to succeed.  otherwise,
331   * we might process an operation with side effects, and be unable to
332   * tell the client that the operation succeeded.
333   *
334   * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
335   * needed to encode an "ordinary" _successful_ operation.  (GETATTR,
336   * READ, READDIR, and READLINK have their own buffer checks.)  if we
337   * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
338   *
339   * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
340   * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
341   * care is taken to ensure that we never fall below this level for any
342   * reason.
343   */
344  #define	COMPOUND_SLACK_SPACE		140    /* OP_GETFH */
345  #define COMPOUND_ERR_SLACK_SPACE	16     /* OP_SETATTR */
346  
347  #define NFSD_LAUNDROMAT_MINTIMEOUT      1   /* seconds */
348  #define	NFSD_COURTESY_CLIENT_TIMEOUT	(24 * 60 * 60)	/* seconds */
349  #define	NFSD_CLIENT_MAX_TRIM_PER_RUN	128
350  #define	NFS4_CLIENTS_PER_GB		1024
351  #define NFSD_DELEGRETURN_TIMEOUT	(HZ / 34)	/* 30ms */
352  
353  /*
354   * The following attributes are currently not supported by the NFSv4 server:
355   *    ARCHIVE       (deprecated anyway)
356   *    HIDDEN        (unlikely to be supported any time soon)
357   *    MIMETYPE      (unlikely to be supported any time soon)
358   *    QUOTA_*       (will be supported in a forthcoming patch)
359   *    SYSTEM        (unlikely to be supported any time soon)
360   *    TIME_BACKUP   (unlikely to be supported any time soon)
361   *    TIME_CREATE   (unlikely to be supported any time soon)
362   */
363  #define NFSD4_SUPPORTED_ATTRS_WORD0                                                         \
364  (FATTR4_WORD0_SUPPORTED_ATTRS   | FATTR4_WORD0_TYPE         | FATTR4_WORD0_FH_EXPIRE_TYPE   \
365   | FATTR4_WORD0_CHANGE          | FATTR4_WORD0_SIZE         | FATTR4_WORD0_LINK_SUPPORT     \
366   | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR   | FATTR4_WORD0_FSID             \
367   | FATTR4_WORD0_UNIQUE_HANDLES  | FATTR4_WORD0_LEASE_TIME   | FATTR4_WORD0_RDATTR_ERROR     \
368   | FATTR4_WORD0_ACLSUPPORT      | FATTR4_WORD0_CANSETTIME   | FATTR4_WORD0_CASE_INSENSITIVE \
369   | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED                             \
370   | FATTR4_WORD0_FILEHANDLE      | FATTR4_WORD0_FILEID       | FATTR4_WORD0_FILES_AVAIL      \
371   | FATTR4_WORD0_FILES_FREE      | FATTR4_WORD0_FILES_TOTAL  | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS      \
372   | FATTR4_WORD0_MAXFILESIZE     | FATTR4_WORD0_MAXLINK      | FATTR4_WORD0_MAXNAME          \
373   | FATTR4_WORD0_MAXREAD         | FATTR4_WORD0_MAXWRITE     | FATTR4_WORD0_ACL)
374  
375  #define NFSD4_SUPPORTED_ATTRS_WORD1                                                         \
376  (FATTR4_WORD1_MODE              | FATTR4_WORD1_NO_TRUNC     | FATTR4_WORD1_NUMLINKS         \
377   | FATTR4_WORD1_OWNER	        | FATTR4_WORD1_OWNER_GROUP  | FATTR4_WORD1_RAWDEV           \
378   | FATTR4_WORD1_SPACE_AVAIL     | FATTR4_WORD1_SPACE_FREE   | FATTR4_WORD1_SPACE_TOTAL      \
379   | FATTR4_WORD1_SPACE_USED      | FATTR4_WORD1_TIME_ACCESS  | FATTR4_WORD1_TIME_ACCESS_SET  \
380   | FATTR4_WORD1_TIME_DELTA      | FATTR4_WORD1_TIME_METADATA   | FATTR4_WORD1_TIME_CREATE      \
381   | FATTR4_WORD1_TIME_MODIFY     | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
382  
383  #define NFSD4_SUPPORTED_ATTRS_WORD2 0
384  
385  /* 4.1 */
386  #ifdef CONFIG_NFSD_PNFS
387  #define PNFSD_SUPPORTED_ATTRS_WORD1	FATTR4_WORD1_FS_LAYOUT_TYPES
388  #define PNFSD_SUPPORTED_ATTRS_WORD2 \
389  (FATTR4_WORD2_LAYOUT_BLKSIZE	| FATTR4_WORD2_LAYOUT_TYPES)
390  #else
391  #define PNFSD_SUPPORTED_ATTRS_WORD1	0
392  #define PNFSD_SUPPORTED_ATTRS_WORD2	0
393  #endif /* CONFIG_NFSD_PNFS */
394  
395  #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
396  	NFSD4_SUPPORTED_ATTRS_WORD0
397  
398  #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
399  	(NFSD4_SUPPORTED_ATTRS_WORD1	| PNFSD_SUPPORTED_ATTRS_WORD1)
400  
401  #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
402  	(NFSD4_SUPPORTED_ATTRS_WORD2	| PNFSD_SUPPORTED_ATTRS_WORD2 | \
403  	 FATTR4_WORD2_SUPPATTR_EXCLCREAT)
404  
405  /* 4.2 */
406  #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
407  #define NFSD4_2_SECURITY_ATTRS		FATTR4_WORD2_SECURITY_LABEL
408  #else
409  #define NFSD4_2_SECURITY_ATTRS		0
410  #endif
411  
412  #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
413  	(NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
414  	FATTR4_WORD2_MODE_UMASK | \
415  	NFSD4_2_SECURITY_ATTRS | \
416  	FATTR4_WORD2_XATTR_SUPPORT)
417  
418  extern const u32 nfsd_suppattrs[3][3];
419  
420  static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr,
421  				    struct nfs42_netaddr *netaddr)
422  {
423  	struct sockaddr_in *sin = (struct sockaddr_in *)addr;
424  	struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
425  	unsigned int port;
426  	size_t ret_addr, ret_port;
427  
428  	switch (addr->sa_family) {
429  	case AF_INET:
430  		port = ntohs(sin->sin_port);
431  		sprintf(netaddr->netid, "tcp");
432  		netaddr->netid_len = 3;
433  		break;
434  	case AF_INET6:
435  		port = ntohs(sin6->sin6_port);
436  		sprintf(netaddr->netid, "tcp6");
437  		netaddr->netid_len = 4;
438  		break;
439  	default:
440  		return nfserr_inval;
441  	}
442  	ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr));
443  	ret_port = snprintf(netaddr->addr + ret_addr,
444  			    RPCBIND_MAXUADDRLEN + 1 - ret_addr,
445  			    ".%u.%u", port >> 8, port & 0xff);
446  	WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr);
447  	netaddr->addr_len = ret_addr + ret_port;
448  	return 0;
449  }
450  
451  static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
452  {
453  	return !((bm1[0] & ~bm2[0]) ||
454  	         (bm1[1] & ~bm2[1]) ||
455  		 (bm1[2] & ~bm2[2]));
456  }
457  
458  static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
459  {
460  	return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
461  }
462  
463  /* These will return ERR_INVAL if specified in GETATTR or READDIR. */
464  #define NFSD_WRITEONLY_ATTRS_WORD1 \
465  	(FATTR4_WORD1_TIME_ACCESS_SET   | FATTR4_WORD1_TIME_MODIFY_SET)
466  
467  /*
468   * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
469   * a writeable attribute here without also adding code to parse it to
470   * nfsd4_decode_fattr().
471   */
472  #define NFSD_WRITEABLE_ATTRS_WORD0 \
473  	(FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
474  #define NFSD_WRITEABLE_ATTRS_WORD1 \
475  	(FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
476  	| FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_CREATE \
477  	| FATTR4_WORD1_TIME_MODIFY_SET)
478  #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
479  #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
480  	FATTR4_WORD2_SECURITY_LABEL
481  #else
482  #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
483  #endif
484  #define NFSD_WRITEABLE_ATTRS_WORD2 \
485  	(FATTR4_WORD2_MODE_UMASK \
486  	| MAYBE_FATTR4_WORD2_SECURITY_LABEL)
487  
488  #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
489  	NFSD_WRITEABLE_ATTRS_WORD0
490  /*
491   * we currently store the exclusive create verifier in the v_{a,m}time
492   * attributes so the client can't set these at create time using EXCLUSIVE4_1
493   */
494  #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
495  	(NFSD_WRITEABLE_ATTRS_WORD1 & \
496  	 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
497  #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
498  	NFSD_WRITEABLE_ATTRS_WORD2
499  
500  extern int nfsd4_is_junction(struct dentry *dentry);
501  extern int register_cld_notifier(void);
502  extern void unregister_cld_notifier(void);
503  #ifdef CONFIG_NFSD_V4_2_INTER_SSC
504  extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn);
505  #endif
506  
507  extern void nfsd4_init_leases_net(struct nfsd_net *nn);
508  
509  #else /* CONFIG_NFSD_V4 */
510  static inline int nfsd4_is_junction(struct dentry *dentry)
511  {
512  	return 0;
513  }
514  
515  static inline void nfsd4_init_leases_net(struct nfsd_net *nn) { };
516  
517  #define register_cld_notifier() 0
518  #define unregister_cld_notifier() do { } while(0)
519  
520  #endif /* CONFIG_NFSD_V4 */
521  
522  #endif /* LINUX_NFSD_NFSD_H */
523