tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
61struct readdir_cd {
62 __be32 err; /* 0, nfserr, or nfserr_eof */
63};
64
65
66extern struct svc_program nfsd_program;
67extern const struct svc_version nfsd_version2, nfsd_version3,
68 nfsd_version4;
69extern struct mutex nfsd_mutex;
70extern spinlock_t nfsd_drc_lock;
71extern unsigned long nfsd_drc_max_mem;
72extern unsigned long nfsd_drc_mem_used;
73
74extern const struct seq_operations nfs_exports_op;
75
76/*
77 * Common void argument and result helpers
78 */
79struct nfsd_voidargs { };
80struct nfsd_voidres { };
81bool nfssvc_decode_voidarg(struct svc_rqst *rqstp,
82 struct xdr_stream *xdr);
83bool nfssvc_encode_voidres(struct svc_rqst *rqstp,
84 struct xdr_stream *xdr);
85
86/*
87 * Function prototypes.
88 */
89int nfsd_svc(int nrservs, struct net *net, const struct cred *cred);
90int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
91
92int nfsd_nrthreads(struct net *);
93int nfsd_nrpools(struct net *);
94int nfsd_get_nrthreads(int n, int *, struct net *);
95int nfsd_set_nrthreads(int n, int *, struct net *);
96int nfsd_pool_stats_open(struct inode *, struct file *);
97int nfsd_pool_stats_release(struct inode *, struct file *);
98void nfsd_shutdown_threads(struct net *net);
99
100void nfsd_put(struct net *net);
101
102bool i_am_nfsd(void);
103
104struct nfsdfs_client {
105 struct kref cl_ref;
106 void (*cl_release)(struct kref *kref);
107};
108
109struct nfsdfs_client *get_nfsdfs_client(struct inode *);
110struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
111 struct nfsdfs_client *ncl, u32 id,
112 const struct tree_descr *,
113 struct dentry **fdentries);
114void nfsd_client_rmdir(struct dentry *dentry);
115
116
117#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
118#ifdef CONFIG_NFSD_V2_ACL
119extern const struct svc_version nfsd_acl_version2;
120#else
121#define nfsd_acl_version2 NULL
122#endif
123#ifdef CONFIG_NFSD_V3_ACL
124extern const struct svc_version nfsd_acl_version3;
125#else
126#define nfsd_acl_version3 NULL
127#endif
128#endif
129
130struct nfsd_net;
131
132enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
133int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
134int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
135void nfsd_reset_versions(struct nfsd_net *nn);
136int nfsd_create_serv(struct net *net);
137
138extern int nfsd_max_blksize;
139
140static inline int nfsd_v4client(struct svc_rqst *rq)
141{
142 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
143}
144static inline struct user_namespace *
145nfsd_user_namespace(const struct svc_rqst *rqstp)
146{
147 const struct cred *cred = rqstp->rq_xprt->xpt_cred;
148 return cred ? cred->user_ns : &init_user_ns;
149}
150
151/*
152 * NFSv4 State
153 */
154#ifdef CONFIG_NFSD_V4
155extern unsigned long max_delegations;
156int nfsd4_init_slabs(void);
157void nfsd4_free_slabs(void);
158int nfs4_state_start(void);
159int nfs4_state_start_net(struct net *net);
160void nfs4_state_shutdown(void);
161void nfs4_state_shutdown_net(struct net *net);
162int nfs4_reset_recoverydir(char *recdir);
163char * nfs4_recoverydir(void);
164bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
165int nfsd4_create_laundry_wq(void);
166void nfsd4_destroy_laundry_wq(void);
167#else
168static inline int nfsd4_init_slabs(void) { return 0; }
169static inline void nfsd4_free_slabs(void) { }
170static inline int nfs4_state_start(void) { return 0; }
171static inline int nfs4_state_start_net(struct net *net) { return 0; }
172static inline void nfs4_state_shutdown(void) { }
173static inline void nfs4_state_shutdown_net(struct net *net) { }
174static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
175static inline char * nfs4_recoverydir(void) {return NULL; }
176static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
177{
178 return false;
179}
180static inline int nfsd4_create_laundry_wq(void) { return 0; };
181static inline void nfsd4_destroy_laundry_wq(void) {};
182#endif
183
184/*
185 * lockd binding
186 */
187void nfsd_lockd_init(void);
188void nfsd_lockd_shutdown(void);
189
190
191/*
192 * These macros provide pre-xdr'ed values for faster operation.
193 */
194#define nfs_ok cpu_to_be32(NFS_OK)
195#define nfserr_perm cpu_to_be32(NFSERR_PERM)
196#define nfserr_noent cpu_to_be32(NFSERR_NOENT)
197#define nfserr_io cpu_to_be32(NFSERR_IO)
198#define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
199#define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
200#define nfserr_acces cpu_to_be32(NFSERR_ACCES)
201#define nfserr_exist cpu_to_be32(NFSERR_EXIST)
202#define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
203#define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
204#define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
205#define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
206#define nfserr_inval cpu_to_be32(NFSERR_INVAL)
207#define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
208#define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
209#define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
210#define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
211#define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
212#define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
213#define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
214#define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
215#define nfserr_stale cpu_to_be32(NFSERR_STALE)
216#define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
217#define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
218#define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
219#define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
220#define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
221#define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
222#define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
223#define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
224#define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
225#define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
226#define nfserr_denied cpu_to_be32(NFSERR_DENIED)
227#define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
228#define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
229#define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
230#define nfserr_same cpu_to_be32(NFSERR_SAME)
231#define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
232#define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
233#define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
234#define nfserr_moved cpu_to_be32(NFSERR_MOVED)
235#define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
236#define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
237#define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
238#define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
239#define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
240#define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
241#define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
242#define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
243#define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
244#define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
245#define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
246#define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
247#define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
248#define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
249#define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
250#define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
251#define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
252#define nfserr_grace cpu_to_be32(NFSERR_GRACE)
253#define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
254#define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
255#define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
256#define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
257#define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
258#define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
259#define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
260#define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
261#define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
262#define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
263#define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
264#define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
265#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
266#define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
267#define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
268#define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
269#define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
270#define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
271#define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
272#define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
273#define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
274#define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
275#define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
276#define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
277#define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
278#define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
279#define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
280#define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
281#define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
282#define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
283#define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
284#define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
285#define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
286#define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
287#define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
288#define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
289#define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
290#define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
291#define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
292#define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
293#define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
294#define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
295#define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
296#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
297#define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
298#define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
299#define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
300#define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
301#define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
302#define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
303#define nfserr_file_open cpu_to_be32(NFS4ERR_FILE_OPEN)
304#define nfserr_xattr2big cpu_to_be32(NFS4ERR_XATTR2BIG)
305#define nfserr_noxattr cpu_to_be32(NFS4ERR_NOXATTR)
306
307/* error codes for internal use */
308/* if a request fails due to kmalloc failure, it gets dropped.
309 * Client should resend eventually
310 */
311#define nfserr_dropit cpu_to_be32(30000)
312/* end-of-file indicator in readdir */
313#define nfserr_eof cpu_to_be32(30001)
314/* replay detected */
315#define nfserr_replay_me cpu_to_be32(11001)
316/* nfs41 replay detected */
317#define nfserr_replay_cache cpu_to_be32(11002)
318
319/* Check for dir entries '.' and '..' */
320#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
321
322#ifdef CONFIG_NFSD_V4
323
324/* before processing a COMPOUND operation, we have to check that there
325 * is enough space in the buffer for XDR encode to succeed. otherwise,
326 * we might process an operation with side effects, and be unable to
327 * tell the client that the operation succeeded.
328 *
329 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
330 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
331 * READ, READDIR, and READLINK have their own buffer checks.) if we
332 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
333 *
334 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
335 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
336 * care is taken to ensure that we never fall below this level for any
337 * reason.
338 */
339#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
340#define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */
341
342#define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
343#define NFSD_COURTESY_CLIENT_TIMEOUT (24 * 60 * 60) /* seconds */
344#define NFSD_CLIENT_MAX_TRIM_PER_RUN 128
345#define NFS4_CLIENTS_PER_GB 1024
346
347/*
348 * The following attributes are currently not supported by the NFSv4 server:
349 * ARCHIVE (deprecated anyway)
350 * HIDDEN (unlikely to be supported any time soon)
351 * MIMETYPE (unlikely to be supported any time soon)
352 * QUOTA_* (will be supported in a forthcoming patch)
353 * SYSTEM (unlikely to be supported any time soon)
354 * TIME_BACKUP (unlikely to be supported any time soon)
355 * TIME_CREATE (unlikely to be supported any time soon)
356 */
357#define NFSD4_SUPPORTED_ATTRS_WORD0 \
358(FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
359 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
360 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
361 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
362 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
363 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
364 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
365 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
366 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
367 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
368
369#define NFSD4_SUPPORTED_ATTRS_WORD1 \
370(FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
371 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
372 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
373 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
374 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_CREATE \
375 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
376
377#define NFSD4_SUPPORTED_ATTRS_WORD2 0
378
379/* 4.1 */
380#ifdef CONFIG_NFSD_PNFS
381#define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES
382#define PNFSD_SUPPORTED_ATTRS_WORD2 \
383(FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES)
384#else
385#define PNFSD_SUPPORTED_ATTRS_WORD1 0
386#define PNFSD_SUPPORTED_ATTRS_WORD2 0
387#endif /* CONFIG_NFSD_PNFS */
388
389#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
390 NFSD4_SUPPORTED_ATTRS_WORD0
391
392#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
393 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1)
394
395#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
396 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \
397 FATTR4_WORD2_SUPPATTR_EXCLCREAT)
398
399/* 4.2 */
400#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
401#define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL
402#else
403#define NFSD4_2_SECURITY_ATTRS 0
404#endif
405
406#define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
407 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
408 FATTR4_WORD2_MODE_UMASK | \
409 NFSD4_2_SECURITY_ATTRS | \
410 FATTR4_WORD2_XATTR_SUPPORT)
411
412extern const u32 nfsd_suppattrs[3][3];
413
414static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr,
415 struct nfs42_netaddr *netaddr)
416{
417 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
418 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
419 unsigned int port;
420 size_t ret_addr, ret_port;
421
422 switch (addr->sa_family) {
423 case AF_INET:
424 port = ntohs(sin->sin_port);
425 sprintf(netaddr->netid, "tcp");
426 netaddr->netid_len = 3;
427 break;
428 case AF_INET6:
429 port = ntohs(sin6->sin6_port);
430 sprintf(netaddr->netid, "tcp6");
431 netaddr->netid_len = 4;
432 break;
433 default:
434 return nfserr_inval;
435 }
436 ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr));
437 ret_port = snprintf(netaddr->addr + ret_addr,
438 RPCBIND_MAXUADDRLEN + 1 - ret_addr,
439 ".%u.%u", port >> 8, port & 0xff);
440 WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr);
441 netaddr->addr_len = ret_addr + ret_port;
442 return 0;
443}
444
445static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
446{
447 return !((bm1[0] & ~bm2[0]) ||
448 (bm1[1] & ~bm2[1]) ||
449 (bm1[2] & ~bm2[2]));
450}
451
452static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
453{
454 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
455}
456
457/* These will return ERR_INVAL if specified in GETATTR or READDIR. */
458#define NFSD_WRITEONLY_ATTRS_WORD1 \
459 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
460
461/*
462 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
463 * a writeable attribute here without also adding code to parse it to
464 * nfsd4_decode_fattr().
465 */
466#define NFSD_WRITEABLE_ATTRS_WORD0 \
467 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
468#define NFSD_WRITEABLE_ATTRS_WORD1 \
469 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
470 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_CREATE \
471 | FATTR4_WORD1_TIME_MODIFY_SET)
472#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
473#define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
474 FATTR4_WORD2_SECURITY_LABEL
475#else
476#define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
477#endif
478#define NFSD_WRITEABLE_ATTRS_WORD2 \
479 (FATTR4_WORD2_MODE_UMASK \
480 | MAYBE_FATTR4_WORD2_SECURITY_LABEL)
481
482#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
483 NFSD_WRITEABLE_ATTRS_WORD0
484/*
485 * we currently store the exclusive create verifier in the v_{a,m}time
486 * attributes so the client can't set these at create time using EXCLUSIVE4_1
487 */
488#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
489 (NFSD_WRITEABLE_ATTRS_WORD1 & \
490 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
491#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
492 NFSD_WRITEABLE_ATTRS_WORD2
493
494extern int nfsd4_is_junction(struct dentry *dentry);
495extern int register_cld_notifier(void);
496extern void unregister_cld_notifier(void);
497#ifdef CONFIG_NFSD_V4_2_INTER_SSC
498extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn);
499#endif
500
501extern void nfsd4_init_leases_net(struct nfsd_net *nn);
502
503#else /* CONFIG_NFSD_V4 */
504static inline int nfsd4_is_junction(struct dentry *dentry)
505{
506 return 0;
507}
508
509static inline void nfsd4_init_leases_net(struct nfsd_net *nn) {};
510
511#define register_cld_notifier() 0
512#define unregister_cld_notifier() do { } while(0)
513
514#endif /* CONFIG_NFSD_V4 */
515
516#endif /* LINUX_NFSD_NFSD_H */