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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 "export.h"
27
28#undef ifdebug
29#ifdef CONFIG_SUNRPC_DEBUG
30# define ifdebug(flag) if (nfsd_debug & NFSDDBG_##flag)
31#else
32# define ifdebug(flag) if (0)
33#endif
34
35/*
36 * nfsd version
37 */
38#define NFSD_MINVERS 2
39#define NFSD_MAXVERS 4
40#define NFSD_SUPPORTED_MINOR_VERSION 2
41bool nfsd_support_version(int vers);
42
43#include "netns.h"
44#include "stats.h"
45
46/*
47 * Maximum blocksizes supported by daemon under various circumstances.
48 */
49#define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD
50/* NFSv2 is limited by the protocol specification, see RFC 1094 */
51#define NFSSVC_MAXBLKSIZE_V2 (8*1024)
52
53
54/*
55 * Largest number of bytes we need to allocate for an NFS
56 * call or reply. Used to control buffer sizes. We use
57 * the length of v3 WRITE, READDIR and READDIR replies
58 * which are an RPC header, up to 26 XDR units of reply
59 * data, and some page data.
60 *
61 * Note that accuracy here doesn't matter too much as the
62 * size is rounded up to a page size when allocating space.
63 */
64#define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
65
66struct readdir_cd {
67 __be32 err; /* 0, nfserr, or nfserr_eof */
68};
69
70/* Maximum number of operations per session compound */
71#define NFSD_MAX_OPS_PER_COMPOUND 50
72
73struct nfsd_genl_rqstp {
74 struct sockaddr rq_daddr;
75 struct sockaddr rq_saddr;
76 unsigned long rq_flags;
77 ktime_t rq_stime;
78 __be32 rq_xid;
79 u32 rq_vers;
80 u32 rq_prog;
81 u32 rq_proc;
82
83 /* NFSv4 compound */
84 u32 rq_opcnt;
85 u32 rq_opnum[NFSD_MAX_OPS_PER_COMPOUND];
86};
87
88extern struct svc_program nfsd_programs[];
89extern const struct svc_version nfsd_version2, nfsd_version3, nfsd_version4;
90extern struct mutex nfsd_mutex;
91extern spinlock_t nfsd_drc_lock;
92extern unsigned long nfsd_drc_max_mem;
93extern unsigned long nfsd_drc_mem_used;
94extern atomic_t nfsd_th_cnt; /* number of available threads */
95
96extern const struct seq_operations nfs_exports_op;
97
98/*
99 * Common void argument and result helpers
100 */
101struct nfsd_voidargs { };
102struct nfsd_voidres { };
103bool nfssvc_decode_voidarg(struct svc_rqst *rqstp,
104 struct xdr_stream *xdr);
105bool nfssvc_encode_voidres(struct svc_rqst *rqstp,
106 struct xdr_stream *xdr);
107
108/*
109 * Function prototypes.
110 */
111int nfsd_svc(int n, int *nservers, struct net *net,
112 const struct cred *cred, const char *scope);
113int nfsd_dispatch(struct svc_rqst *rqstp);
114
115int nfsd_nrthreads(struct net *);
116int nfsd_nrpools(struct net *);
117int nfsd_get_nrthreads(int n, int *, struct net *);
118int nfsd_set_nrthreads(int n, int *, struct net *);
119void nfsd_shutdown_threads(struct net *net);
120
121struct svc_rqst *nfsd_current_rqst(void);
122
123struct nfsdfs_client {
124 struct kref cl_ref;
125 void (*cl_release)(struct kref *kref);
126};
127
128struct nfsdfs_client *get_nfsdfs_client(struct inode *);
129struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
130 struct nfsdfs_client *ncl, u32 id,
131 const struct tree_descr *,
132 struct dentry **fdentries);
133void nfsd_client_rmdir(struct dentry *dentry);
134
135
136#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
137#ifdef CONFIG_NFSD_V2_ACL
138extern const struct svc_version nfsd_acl_version2;
139#else
140#define nfsd_acl_version2 NULL
141#endif
142#ifdef CONFIG_NFSD_V3_ACL
143extern const struct svc_version nfsd_acl_version3;
144#else
145#define nfsd_acl_version3 NULL
146#endif
147#endif
148
149#if IS_ENABLED(CONFIG_NFS_LOCALIO)
150extern const struct svc_version localio_version1;
151#endif
152
153struct nfsd_net;
154
155enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
156int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
157int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
158void nfsd_reset_versions(struct nfsd_net *nn);
159int nfsd_create_serv(struct net *net);
160void nfsd_destroy_serv(struct net *net);
161
162extern int nfsd_max_blksize;
163
164static inline int nfsd_v4client(struct svc_rqst *rq)
165{
166 return rq && rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
167}
168static inline struct user_namespace *
169nfsd_user_namespace(const struct svc_rqst *rqstp)
170{
171 const struct cred *cred = rqstp->rq_xprt->xpt_cred;
172 return cred ? cred->user_ns : &init_user_ns;
173}
174
175/*
176 * NFSv4 State
177 */
178#ifdef CONFIG_NFSD_V4
179extern unsigned long max_delegations;
180int nfsd4_init_slabs(void);
181void nfsd4_free_slabs(void);
182int nfs4_state_start(void);
183int nfs4_state_start_net(struct net *net);
184void nfs4_state_shutdown(void);
185void nfs4_state_shutdown_net(struct net *net);
186int nfs4_reset_recoverydir(char *recdir);
187char * nfs4_recoverydir(void);
188bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
189int nfsd4_create_laundry_wq(void);
190void nfsd4_destroy_laundry_wq(void);
191bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode);
192#else
193static inline int nfsd4_init_slabs(void) { return 0; }
194static inline void nfsd4_free_slabs(void) { }
195static inline int nfs4_state_start(void) { return 0; }
196static inline int nfs4_state_start_net(struct net *net) { return 0; }
197static inline void nfs4_state_shutdown(void) { }
198static inline void nfs4_state_shutdown_net(struct net *net) { }
199static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
200static inline char * nfs4_recoverydir(void) {return NULL; }
201static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
202{
203 return false;
204}
205static inline int nfsd4_create_laundry_wq(void) { return 0; };
206static inline void nfsd4_destroy_laundry_wq(void) {};
207static inline bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp,
208 struct inode *inode)
209{
210 return false;
211}
212#endif
213
214/*
215 * lockd binding
216 */
217void nfsd_lockd_init(void);
218void nfsd_lockd_shutdown(void);
219
220
221/*
222 * These macros provide pre-xdr'ed values for faster operation.
223 */
224#define nfs_ok cpu_to_be32(NFS_OK)
225#define nfserr_perm cpu_to_be32(NFSERR_PERM)
226#define nfserr_noent cpu_to_be32(NFSERR_NOENT)
227#define nfserr_io cpu_to_be32(NFSERR_IO)
228#define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
229#define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
230#define nfserr_acces cpu_to_be32(NFSERR_ACCES)
231#define nfserr_exist cpu_to_be32(NFSERR_EXIST)
232#define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
233#define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
234#define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
235#define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
236#define nfserr_inval cpu_to_be32(NFSERR_INVAL)
237#define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
238#define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
239#define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
240#define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
241#define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
242#define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
243#define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
244#define nfserr_stale cpu_to_be32(NFSERR_STALE)
245#define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
246#define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
247#define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
248#define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
249#define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
250#define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
251#define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
252#define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
253#define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
254#define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
255#define nfserr_denied cpu_to_be32(NFSERR_DENIED)
256#define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
257#define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
258#define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
259#define nfserr_same cpu_to_be32(NFSERR_SAME)
260#define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
261#define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
262#define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
263#define nfserr_moved cpu_to_be32(NFSERR_MOVED)
264#define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
265#define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
266#define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
267#define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
268#define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
269#define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
270#define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
271#define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
272#define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
273#define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
274#define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
275#define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
276#define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
277#define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
278#define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
279#define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
280#define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
281#define nfserr_grace cpu_to_be32(NFSERR_GRACE)
282#define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
283#define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
284#define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
285#define nfserr_admin_revoked cpu_to_be32(NFS4ERR_ADMIN_REVOKED)
286#define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
287#define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
288#define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
289#define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
290#define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
291#define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
292#define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
293#define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
294#define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
295#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
296#define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
297#define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
298#define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
299#define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
300#define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
301#define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
302#define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
303#define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
304#define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
305#define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
306#define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
307#define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
308#define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
309#define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
310#define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
311#define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
312#define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
313#define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
314#define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
315#define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
316#define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
317#define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
318#define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
319#define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
320#define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
321#define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
322#define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
323#define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
324#define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
325#define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
326#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
327#define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
328#define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
329#define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
330#define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
331#define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
332#define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
333#define nfserr_file_open cpu_to_be32(NFS4ERR_FILE_OPEN)
334#define nfserr_xattr2big cpu_to_be32(NFS4ERR_XATTR2BIG)
335#define nfserr_noxattr cpu_to_be32(NFS4ERR_NOXATTR)
336
337/*
338 * Error codes for internal use. We use enum to choose numbers that are
339 * not already assigned, then covert to be32 resulting in a number that
340 * cannot conflict with any existing be32 nfserr value.
341 */
342enum {
343 NFSERR_DROPIT = NFS4ERR_FIRST_FREE,
344/* if a request fails due to kmalloc failure, it gets dropped.
345 * Client should resend eventually
346 */
347#define nfserr_dropit cpu_to_be32(NFSERR_DROPIT)
348
349/* end-of-file indicator in readdir */
350 NFSERR_EOF,
351#define nfserr_eof cpu_to_be32(NFSERR_EOF)
352
353/* replay detected */
354 NFSERR_REPLAY_ME,
355#define nfserr_replay_me cpu_to_be32(NFSERR_REPLAY_ME)
356
357/* nfs41 replay detected */
358 NFSERR_REPLAY_CACHE,
359#define nfserr_replay_cache cpu_to_be32(NFSERR_REPLAY_CACHE)
360
361/* symlink found where dir expected - handled differently to
362 * other symlink found errors by NFSv3.
363 */
364 NFSERR_SYMLINK_NOT_DIR,
365#define nfserr_symlink_not_dir cpu_to_be32(NFSERR_SYMLINK_NOT_DIR)
366};
367
368/* Check for dir entries '.' and '..' */
369#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
370
371#ifdef CONFIG_NFSD_V4
372
373/* before processing a COMPOUND operation, we have to check that there
374 * is enough space in the buffer for XDR encode to succeed. otherwise,
375 * we might process an operation with side effects, and be unable to
376 * tell the client that the operation succeeded.
377 *
378 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
379 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
380 * READ, READDIR, and READLINK have their own buffer checks.) if we
381 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
382 *
383 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
384 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
385 * care is taken to ensure that we never fall below this level for any
386 * reason.
387 */
388#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
389#define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */
390
391#define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
392#define NFSD_COURTESY_CLIENT_TIMEOUT (24 * 60 * 60) /* seconds */
393#define NFSD_CLIENT_MAX_TRIM_PER_RUN 128
394#define NFS4_CLIENTS_PER_GB 1024
395#define NFSD_DELEGRETURN_TIMEOUT (HZ / 34) /* 30ms */
396#define NFSD_CB_GETATTR_TIMEOUT NFSD_DELEGRETURN_TIMEOUT
397
398/*
399 * The following attributes are currently not supported by the NFSv4 server:
400 * ARCHIVE (deprecated anyway)
401 * HIDDEN (unlikely to be supported any time soon)
402 * MIMETYPE (unlikely to be supported any time soon)
403 * QUOTA_* (will be supported in a forthcoming patch)
404 * SYSTEM (unlikely to be supported any time soon)
405 * TIME_BACKUP (unlikely to be supported any time soon)
406 * TIME_CREATE (unlikely to be supported any time soon)
407 */
408#define NFSD4_SUPPORTED_ATTRS_WORD0 \
409(FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
410 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
411 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
412 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
413 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
414 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
415 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
416 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
417 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
418 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
419
420#define NFSD4_SUPPORTED_ATTRS_WORD1 \
421(FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
422 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
423 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
424 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
425 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_CREATE \
426 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
427
428#define NFSD4_SUPPORTED_ATTRS_WORD2 0
429
430/* 4.1 */
431#ifdef CONFIG_NFSD_PNFS
432#define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES
433#define PNFSD_SUPPORTED_ATTRS_WORD2 \
434(FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES)
435#else
436#define PNFSD_SUPPORTED_ATTRS_WORD1 0
437#define PNFSD_SUPPORTED_ATTRS_WORD2 0
438#endif /* CONFIG_NFSD_PNFS */
439
440#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
441 NFSD4_SUPPORTED_ATTRS_WORD0
442
443#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
444 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1)
445
446#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
447 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \
448 FATTR4_WORD2_SUPPATTR_EXCLCREAT)
449
450/* 4.2 */
451#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
452#define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL
453#else
454#define NFSD4_2_SECURITY_ATTRS 0
455#endif
456
457#define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
458 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
459 FATTR4_WORD2_MODE_UMASK | \
460 NFSD4_2_SECURITY_ATTRS | \
461 FATTR4_WORD2_XATTR_SUPPORT)
462
463extern const u32 nfsd_suppattrs[3][3];
464
465static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr,
466 struct nfs42_netaddr *netaddr)
467{
468 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
469 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
470 unsigned int port;
471 size_t ret_addr, ret_port;
472
473 switch (addr->sa_family) {
474 case AF_INET:
475 port = ntohs(sin->sin_port);
476 sprintf(netaddr->netid, "tcp");
477 netaddr->netid_len = 3;
478 break;
479 case AF_INET6:
480 port = ntohs(sin6->sin6_port);
481 sprintf(netaddr->netid, "tcp6");
482 netaddr->netid_len = 4;
483 break;
484 default:
485 return nfserr_inval;
486 }
487 ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr));
488 ret_port = snprintf(netaddr->addr + ret_addr,
489 RPCBIND_MAXUADDRLEN + 1 - ret_addr,
490 ".%u.%u", port >> 8, port & 0xff);
491 WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr);
492 netaddr->addr_len = ret_addr + ret_port;
493 return 0;
494}
495
496static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
497{
498 return !((bm1[0] & ~bm2[0]) ||
499 (bm1[1] & ~bm2[1]) ||
500 (bm1[2] & ~bm2[2]));
501}
502
503static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
504{
505 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
506}
507
508/* These will return ERR_INVAL if specified in GETATTR or READDIR. */
509#define NFSD_WRITEONLY_ATTRS_WORD1 \
510 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
511
512/*
513 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
514 * a writeable attribute here without also adding code to parse it to
515 * nfsd4_decode_fattr().
516 */
517#define NFSD_WRITEABLE_ATTRS_WORD0 \
518 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
519#define NFSD_WRITEABLE_ATTRS_WORD1 \
520 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
521 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_CREATE \
522 | FATTR4_WORD1_TIME_MODIFY_SET)
523#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
524#define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
525 FATTR4_WORD2_SECURITY_LABEL
526#else
527#define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
528#endif
529#define NFSD_WRITEABLE_ATTRS_WORD2 \
530 (FATTR4_WORD2_MODE_UMASK \
531 | MAYBE_FATTR4_WORD2_SECURITY_LABEL)
532
533#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
534 NFSD_WRITEABLE_ATTRS_WORD0
535/*
536 * we currently store the exclusive create verifier in the v_{a,m}time
537 * attributes so the client can't set these at create time using EXCLUSIVE4_1
538 */
539#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
540 (NFSD_WRITEABLE_ATTRS_WORD1 & \
541 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
542#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
543 NFSD_WRITEABLE_ATTRS_WORD2
544
545extern int nfsd4_is_junction(struct dentry *dentry);
546extern int register_cld_notifier(void);
547extern void unregister_cld_notifier(void);
548#ifdef CONFIG_NFSD_V4_2_INTER_SSC
549extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn);
550#endif
551
552extern void nfsd4_init_leases_net(struct nfsd_net *nn);
553
554#else /* CONFIG_NFSD_V4 */
555static inline int nfsd4_is_junction(struct dentry *dentry)
556{
557 return 0;
558}
559
560static inline void nfsd4_init_leases_net(struct nfsd_net *nn) { };
561
562#define register_cld_notifier() 0
563#define unregister_cld_notifier() do { } while(0)
564
565#endif /* CONFIG_NFSD_V4 */
566
567#endif /* LINUX_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
23#include <uapi/linux/nfsd/debug.h>
24
25#include "netns.h"
26#include "stats.h"
27#include "export.h"
28
29#undef ifdebug
30#ifdef CONFIG_SUNRPC_DEBUG
31# define ifdebug(flag) if (nfsd_debug & NFSDDBG_##flag)
32#else
33# define ifdebug(flag) if (0)
34#endif
35
36/*
37 * nfsd version
38 */
39#define NFSD_SUPPORTED_MINOR_VERSION 2
40/*
41 * Maximum blocksizes supported by daemon under various circumstances.
42 */
43#define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD
44/* NFSv2 is limited by the protocol specification, see RFC 1094 */
45#define NFSSVC_MAXBLKSIZE_V2 (8*1024)
46
47
48/*
49 * Largest number of bytes we need to allocate for an NFS
50 * call or reply. Used to control buffer sizes. We use
51 * the length of v3 WRITE, READDIR and READDIR replies
52 * which are an RPC header, up to 26 XDR units of reply
53 * data, and some page data.
54 *
55 * Note that accuracy here doesn't matter too much as the
56 * size is rounded up to a page size when allocating space.
57 */
58#define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
59
60struct readdir_cd {
61 __be32 err; /* 0, nfserr, or nfserr_eof */
62};
63
64
65extern struct svc_program nfsd_program;
66extern const struct svc_version nfsd_version2, nfsd_version3,
67 nfsd_version4;
68extern struct mutex nfsd_mutex;
69extern spinlock_t nfsd_drc_lock;
70extern unsigned long nfsd_drc_max_mem;
71extern unsigned long nfsd_drc_mem_used;
72
73extern const struct seq_operations nfs_exports_op;
74
75/*
76 * Function prototypes.
77 */
78int nfsd_svc(int nrservs, struct net *net, const struct cred *cred);
79int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
80
81int nfsd_nrthreads(struct net *);
82int nfsd_nrpools(struct net *);
83int nfsd_get_nrthreads(int n, int *, struct net *);
84int nfsd_set_nrthreads(int n, int *, struct net *);
85int nfsd_pool_stats_open(struct inode *, struct file *);
86int nfsd_pool_stats_release(struct inode *, struct file *);
87
88void nfsd_destroy(struct net *net);
89
90struct nfsdfs_client {
91 struct kref cl_ref;
92 void (*cl_release)(struct kref *kref);
93};
94
95struct nfsdfs_client *get_nfsdfs_client(struct inode *);
96struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
97 struct nfsdfs_client *ncl, u32 id, const struct tree_descr *);
98void nfsd_client_rmdir(struct dentry *dentry);
99
100#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
101#ifdef CONFIG_NFSD_V2_ACL
102extern const struct svc_version nfsd_acl_version2;
103#else
104#define nfsd_acl_version2 NULL
105#endif
106#ifdef CONFIG_NFSD_V3_ACL
107extern const struct svc_version nfsd_acl_version3;
108#else
109#define nfsd_acl_version3 NULL
110#endif
111#endif
112
113struct nfsd_net;
114
115enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
116int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
117int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
118void nfsd_reset_versions(struct nfsd_net *nn);
119int nfsd_create_serv(struct net *net);
120
121extern int nfsd_max_blksize;
122
123static inline int nfsd_v4client(struct svc_rqst *rq)
124{
125 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
126}
127static inline struct user_namespace *
128nfsd_user_namespace(const struct svc_rqst *rqstp)
129{
130 const struct cred *cred = rqstp->rq_xprt->xpt_cred;
131 return cred ? cred->user_ns : &init_user_ns;
132}
133
134/*
135 * NFSv4 State
136 */
137#ifdef CONFIG_NFSD_V4
138extern unsigned long max_delegations;
139int nfsd4_init_slabs(void);
140void nfsd4_free_slabs(void);
141int nfs4_state_start(void);
142int nfs4_state_start_net(struct net *net);
143void nfs4_state_shutdown(void);
144void nfs4_state_shutdown_net(struct net *net);
145void nfs4_reset_lease(time_t leasetime);
146int nfs4_reset_recoverydir(char *recdir);
147char * nfs4_recoverydir(void);
148bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
149#else
150static inline int nfsd4_init_slabs(void) { return 0; }
151static inline void nfsd4_free_slabs(void) { }
152static inline int nfs4_state_start(void) { return 0; }
153static inline int nfs4_state_start_net(struct net *net) { return 0; }
154static inline void nfs4_state_shutdown(void) { }
155static inline void nfs4_state_shutdown_net(struct net *net) { }
156static inline void nfs4_reset_lease(time_t leasetime) { }
157static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
158static inline char * nfs4_recoverydir(void) {return NULL; }
159static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
160{
161 return false;
162}
163#endif
164
165/*
166 * lockd binding
167 */
168void nfsd_lockd_init(void);
169void nfsd_lockd_shutdown(void);
170
171
172/*
173 * These macros provide pre-xdr'ed values for faster operation.
174 */
175#define nfs_ok cpu_to_be32(NFS_OK)
176#define nfserr_perm cpu_to_be32(NFSERR_PERM)
177#define nfserr_noent cpu_to_be32(NFSERR_NOENT)
178#define nfserr_io cpu_to_be32(NFSERR_IO)
179#define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
180#define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
181#define nfserr_acces cpu_to_be32(NFSERR_ACCES)
182#define nfserr_exist cpu_to_be32(NFSERR_EXIST)
183#define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
184#define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
185#define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
186#define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
187#define nfserr_inval cpu_to_be32(NFSERR_INVAL)
188#define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
189#define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
190#define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
191#define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
192#define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
193#define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
194#define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
195#define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
196#define nfserr_stale cpu_to_be32(NFSERR_STALE)
197#define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
198#define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
199#define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
200#define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
201#define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
202#define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
203#define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
204#define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
205#define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
206#define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
207#define nfserr_denied cpu_to_be32(NFSERR_DENIED)
208#define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
209#define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
210#define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
211#define nfserr_same cpu_to_be32(NFSERR_SAME)
212#define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
213#define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
214#define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
215#define nfserr_moved cpu_to_be32(NFSERR_MOVED)
216#define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
217#define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
218#define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
219#define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
220#define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
221#define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
222#define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
223#define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
224#define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
225#define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
226#define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
227#define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
228#define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
229#define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
230#define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
231#define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
232#define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
233#define nfserr_grace cpu_to_be32(NFSERR_GRACE)
234#define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
235#define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
236#define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
237#define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
238#define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
239#define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
240#define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
241#define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
242#define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
243#define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
244#define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
245#define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
246#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
247#define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
248#define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
249#define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
250#define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
251#define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
252#define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
253#define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
254#define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
255#define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
256#define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
257#define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
258#define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
259#define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
260#define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
261#define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
262#define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
263#define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
264#define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
265#define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
266#define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
267#define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
268#define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
269#define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
270#define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
271#define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
272#define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
273#define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
274#define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
275#define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
276#define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
277#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
278#define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
279#define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
280#define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
281#define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
282#define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
283#define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
284
285/* error codes for internal use */
286/* if a request fails due to kmalloc failure, it gets dropped.
287 * Client should resend eventually
288 */
289#define nfserr_dropit cpu_to_be32(30000)
290/* end-of-file indicator in readdir */
291#define nfserr_eof cpu_to_be32(30001)
292/* replay detected */
293#define nfserr_replay_me cpu_to_be32(11001)
294/* nfs41 replay detected */
295#define nfserr_replay_cache cpu_to_be32(11002)
296
297/* Check for dir entries '.' and '..' */
298#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
299
300#ifdef CONFIG_NFSD_V4
301
302/* before processing a COMPOUND operation, we have to check that there
303 * is enough space in the buffer for XDR encode to succeed. otherwise,
304 * we might process an operation with side effects, and be unable to
305 * tell the client that the operation succeeded.
306 *
307 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
308 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
309 * READ, READDIR, and READLINK have their own buffer checks.) if we
310 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
311 *
312 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
313 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
314 * care is taken to ensure that we never fall below this level for any
315 * reason.
316 */
317#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
318#define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */
319
320#define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
321
322/*
323 * The following attributes are currently not supported by the NFSv4 server:
324 * ARCHIVE (deprecated anyway)
325 * HIDDEN (unlikely to be supported any time soon)
326 * MIMETYPE (unlikely to be supported any time soon)
327 * QUOTA_* (will be supported in a forthcoming patch)
328 * SYSTEM (unlikely to be supported any time soon)
329 * TIME_BACKUP (unlikely to be supported any time soon)
330 * TIME_CREATE (unlikely to be supported any time soon)
331 */
332#define NFSD4_SUPPORTED_ATTRS_WORD0 \
333(FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
334 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
335 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
336 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
337 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
338 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
339 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
340 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
341 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
342 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
343
344#define NFSD4_SUPPORTED_ATTRS_WORD1 \
345(FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
346 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
347 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
348 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
349 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \
350 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
351
352#define NFSD4_SUPPORTED_ATTRS_WORD2 0
353
354/* 4.1 */
355#ifdef CONFIG_NFSD_PNFS
356#define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES
357#define PNFSD_SUPPORTED_ATTRS_WORD2 \
358(FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES)
359#else
360#define PNFSD_SUPPORTED_ATTRS_WORD1 0
361#define PNFSD_SUPPORTED_ATTRS_WORD2 0
362#endif /* CONFIG_NFSD_PNFS */
363
364#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
365 NFSD4_SUPPORTED_ATTRS_WORD0
366
367#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
368 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1)
369
370#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
371 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \
372 FATTR4_WORD2_SUPPATTR_EXCLCREAT)
373
374/* 4.2 */
375#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
376#define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL
377#else
378#define NFSD4_2_SECURITY_ATTRS 0
379#endif
380
381#define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
382 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
383 FATTR4_WORD2_CHANGE_ATTR_TYPE | \
384 FATTR4_WORD2_MODE_UMASK | \
385 NFSD4_2_SECURITY_ATTRS)
386
387extern const u32 nfsd_suppattrs[3][3];
388
389static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
390{
391 return !((bm1[0] & ~bm2[0]) ||
392 (bm1[1] & ~bm2[1]) ||
393 (bm1[2] & ~bm2[2]));
394}
395
396static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
397{
398 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
399}
400
401/* These will return ERR_INVAL if specified in GETATTR or READDIR. */
402#define NFSD_WRITEONLY_ATTRS_WORD1 \
403 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
404
405/*
406 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
407 * a writeable attribute here without also adding code to parse it to
408 * nfsd4_decode_fattr().
409 */
410#define NFSD_WRITEABLE_ATTRS_WORD0 \
411 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
412#define NFSD_WRITEABLE_ATTRS_WORD1 \
413 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
414 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
415#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
416#define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
417 FATTR4_WORD2_SECURITY_LABEL
418#else
419#define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
420#endif
421#define NFSD_WRITEABLE_ATTRS_WORD2 \
422 (FATTR4_WORD2_MODE_UMASK \
423 | MAYBE_FATTR4_WORD2_SECURITY_LABEL)
424
425#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
426 NFSD_WRITEABLE_ATTRS_WORD0
427/*
428 * we currently store the exclusive create verifier in the v_{a,m}time
429 * attributes so the client can't set these at create time using EXCLUSIVE4_1
430 */
431#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
432 (NFSD_WRITEABLE_ATTRS_WORD1 & \
433 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
434#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
435 NFSD_WRITEABLE_ATTRS_WORD2
436
437extern int nfsd4_is_junction(struct dentry *dentry);
438extern int register_cld_notifier(void);
439extern void unregister_cld_notifier(void);
440#else /* CONFIG_NFSD_V4 */
441static inline int nfsd4_is_junction(struct dentry *dentry)
442{
443 return 0;
444}
445
446#define register_cld_notifier() 0
447#define unregister_cld_notifier() do { } while(0)
448
449#endif /* CONFIG_NFSD_V4 */
450
451#endif /* LINUX_NFSD_NFSD_H */