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 * Default and maximum payload size (NFS READ or WRITE), in bytes.
48 * The default is historical, and the maximum is an implementation
49 * limit.
50 */
51enum {
52 NFSSVC_DEFBLKSIZE = 1 * 1024 * 1024,
53 NFSSVC_MAXBLKSIZE = RPCSVC_MAXPAYLOAD,
54};
55
56struct readdir_cd {
57 __be32 err; /* 0, nfserr, or nfserr_eof */
58};
59
60/* Maximum number of operations per session compound */
61#define NFSD_MAX_OPS_PER_COMPOUND 50
62
63struct nfsd_genl_rqstp {
64 struct sockaddr rq_daddr;
65 struct sockaddr rq_saddr;
66 unsigned long rq_flags;
67 ktime_t rq_stime;
68 __be32 rq_xid;
69 u32 rq_vers;
70 u32 rq_prog;
71 u32 rq_proc;
72
73 /* NFSv4 compound */
74 u32 rq_opcnt;
75 u32 rq_opnum[NFSD_MAX_OPS_PER_COMPOUND];
76};
77
78extern struct svc_program nfsd_programs[];
79extern const struct svc_version nfsd_version2, nfsd_version3, nfsd_version4;
80extern struct mutex nfsd_mutex;
81extern atomic_t nfsd_th_cnt; /* number of available threads */
82
83extern const struct seq_operations nfs_exports_op;
84
85/*
86 * Common void argument and result helpers
87 */
88struct nfsd_voidargs { };
89struct nfsd_voidres { };
90bool nfssvc_decode_voidarg(struct svc_rqst *rqstp,
91 struct xdr_stream *xdr);
92bool nfssvc_encode_voidres(struct svc_rqst *rqstp,
93 struct xdr_stream *xdr);
94
95/*
96 * Function prototypes.
97 */
98int nfsd_svc(int n, int *nservers, struct net *net,
99 const struct cred *cred, const char *scope);
100int nfsd_dispatch(struct svc_rqst *rqstp);
101
102int nfsd_nrthreads(struct net *);
103int nfsd_nrpools(struct net *);
104int nfsd_get_nrthreads(int n, int *, struct net *);
105int nfsd_set_nrthreads(int n, int *, struct net *);
106void nfsd_shutdown_threads(struct net *net);
107
108struct svc_rqst *nfsd_current_rqst(void);
109
110struct nfsdfs_client {
111 struct kref cl_ref;
112 void (*cl_release)(struct kref *kref);
113};
114
115struct nfsdfs_client *get_nfsdfs_client(struct inode *);
116struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
117 struct nfsdfs_client *ncl, u32 id,
118 const struct tree_descr *,
119 struct dentry **fdentries);
120void nfsd_client_rmdir(struct dentry *dentry);
121
122
123#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
124#ifdef CONFIG_NFSD_V2_ACL
125extern const struct svc_version nfsd_acl_version2;
126#else
127#define nfsd_acl_version2 NULL
128#endif
129#ifdef CONFIG_NFSD_V3_ACL
130extern const struct svc_version nfsd_acl_version3;
131#else
132#define nfsd_acl_version3 NULL
133#endif
134#endif
135
136#if IS_ENABLED(CONFIG_NFS_LOCALIO)
137extern const struct svc_version localio_version1;
138#endif
139
140struct nfsd_net;
141
142enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
143int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
144int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
145void nfsd_reset_versions(struct nfsd_net *nn);
146int nfsd_create_serv(struct net *net);
147void nfsd_destroy_serv(struct net *net);
148
149#ifdef CONFIG_DEBUG_FS
150void nfsd_debugfs_init(void);
151void nfsd_debugfs_exit(void);
152#else
153static inline void nfsd_debugfs_init(void) {}
154static inline void nfsd_debugfs_exit(void) {}
155#endif
156
157extern bool nfsd_disable_splice_read __read_mostly;
158
159extern int nfsd_max_blksize;
160
161static inline int nfsd_v4client(struct svc_rqst *rq)
162{
163 return rq && rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
164}
165static inline struct user_namespace *
166nfsd_user_namespace(const struct svc_rqst *rqstp)
167{
168 const struct cred *cred = rqstp->rq_xprt->xpt_cred;
169 return cred ? cred->user_ns : &init_user_ns;
170}
171
172/*
173 * NFSv4 State
174 */
175#ifdef CONFIG_NFSD_V4
176extern unsigned long max_delegations;
177int nfsd4_init_slabs(void);
178void nfsd4_free_slabs(void);
179int nfs4_state_start(void);
180int nfs4_state_start_net(struct net *net);
181void nfs4_state_shutdown(void);
182void nfs4_state_shutdown_net(struct net *net);
183int nfs4_reset_recoverydir(char *recdir);
184char * nfs4_recoverydir(void);
185bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
186int nfsd4_create_laundry_wq(void);
187void nfsd4_destroy_laundry_wq(void);
188bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode);
189#else
190static inline int nfsd4_init_slabs(void) { return 0; }
191static inline void nfsd4_free_slabs(void) { }
192static inline int nfs4_state_start(void) { return 0; }
193static inline int nfs4_state_start_net(struct net *net) { return 0; }
194static inline void nfs4_state_shutdown(void) { }
195static inline void nfs4_state_shutdown_net(struct net *net) { }
196static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
197static inline char * nfs4_recoverydir(void) {return NULL; }
198static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
199{
200 return false;
201}
202static inline int nfsd4_create_laundry_wq(void) { return 0; };
203static inline void nfsd4_destroy_laundry_wq(void) {};
204static inline bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp,
205 struct inode *inode)
206{
207 return false;
208}
209#endif
210
211/*
212 * lockd binding
213 */
214void nfsd_lockd_init(void);
215void nfsd_lockd_shutdown(void);
216
217
218/*
219 * These macros provide pre-xdr'ed values for faster operation.
220 */
221#define nfs_ok cpu_to_be32(NFS_OK)
222#define nfserr_perm cpu_to_be32(NFSERR_PERM)
223#define nfserr_noent cpu_to_be32(NFSERR_NOENT)
224#define nfserr_io cpu_to_be32(NFSERR_IO)
225#define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
226#define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
227#define nfserr_acces cpu_to_be32(NFSERR_ACCES)
228#define nfserr_exist cpu_to_be32(NFSERR_EXIST)
229#define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
230#define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
231#define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
232#define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
233#define nfserr_inval cpu_to_be32(NFSERR_INVAL)
234#define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
235#define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
236#define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
237#define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
238#define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
239#define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
240#define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
241#define nfserr_stale cpu_to_be32(NFSERR_STALE)
242#define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
243#define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
244#define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
245#define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
246#define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
247#define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
248#define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
249#define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
250#define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
251#define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
252#define nfserr_denied cpu_to_be32(NFSERR_DENIED)
253#define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
254#define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
255#define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
256#define nfserr_same cpu_to_be32(NFSERR_SAME)
257#define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
258#define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
259#define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
260#define nfserr_moved cpu_to_be32(NFSERR_MOVED)
261#define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
262#define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
263#define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
264#define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
265#define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
266#define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
267#define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
268#define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
269#define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
270#define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
271#define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
272#define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
273#define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
274#define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
275#define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
276#define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
277#define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
278#define nfserr_grace cpu_to_be32(NFSERR_GRACE)
279#define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
280#define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
281#define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
282#define nfserr_admin_revoked cpu_to_be32(NFS4ERR_ADMIN_REVOKED)
283#define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
284#define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
285#define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
286#define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
287#define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
288#define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
289#define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
290#define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
291#define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
292#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
293#define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
294#define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
295#define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
296#define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
297#define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
298#define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
299#define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
300#define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
301#define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
302#define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
303#define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
304#define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
305#define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
306#define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
307#define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
308#define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
309#define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
310#define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
311#define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
312#define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
313#define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
314#define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
315#define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
316#define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
317#define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
318#define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
319#define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
320#define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
321#define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
322#define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
323#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
324#define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
325#define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
326#define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
327#define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
328#define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
329#define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
330#define nfserr_file_open cpu_to_be32(NFS4ERR_FILE_OPEN)
331#define nfserr_xattr2big cpu_to_be32(NFS4ERR_XATTR2BIG)
332#define nfserr_noxattr cpu_to_be32(NFS4ERR_NOXATTR)
333
334/*
335 * Error codes for internal use. We use enum to choose numbers that are
336 * not already assigned, then covert to be32 resulting in a number that
337 * cannot conflict with any existing be32 nfserr value.
338 */
339enum {
340 NFSERR_DROPIT = NFS4ERR_FIRST_FREE,
341/* if a request fails due to kmalloc failure, it gets dropped.
342 * Client should resend eventually
343 */
344#define nfserr_dropit cpu_to_be32(NFSERR_DROPIT)
345
346/* end-of-file indicator in readdir */
347 NFSERR_EOF,
348#define nfserr_eof cpu_to_be32(NFSERR_EOF)
349
350/* replay detected */
351 NFSERR_REPLAY_ME,
352#define nfserr_replay_me cpu_to_be32(NFSERR_REPLAY_ME)
353
354/* nfs41 replay detected */
355 NFSERR_REPLAY_CACHE,
356#define nfserr_replay_cache cpu_to_be32(NFSERR_REPLAY_CACHE)
357
358/* symlink found where dir expected - handled differently to
359 * other symlink found errors by NFSv3.
360 */
361 NFSERR_SYMLINK_NOT_DIR,
362#define nfserr_symlink_not_dir cpu_to_be32(NFSERR_SYMLINK_NOT_DIR)
363};
364
365/* Check for dir entries '.' and '..' */
366#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
367
368#ifdef CONFIG_NFSD_V4
369
370/* before processing a COMPOUND operation, we have to check that there
371 * is enough space in the buffer for XDR encode to succeed. otherwise,
372 * we might process an operation with side effects, and be unable to
373 * tell the client that the operation succeeded.
374 *
375 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
376 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
377 * READ, READDIR, and READLINK have their own buffer checks.) if we
378 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
379 *
380 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
381 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
382 * care is taken to ensure that we never fall below this level for any
383 * reason.
384 */
385#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
386#define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */
387
388#define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
389#define NFSD_COURTESY_CLIENT_TIMEOUT (24 * 60 * 60) /* seconds */
390#define NFSD_CLIENT_MAX_TRIM_PER_RUN 128
391#define NFS4_CLIENTS_PER_GB 1024
392#define NFSD_DELEGRETURN_TIMEOUT (HZ / 34) /* 30ms */
393#define NFSD_CB_GETATTR_TIMEOUT NFSD_DELEGRETURN_TIMEOUT
394
395/*
396 * The following attributes are currently not supported by the NFSv4 server:
397 * ARCHIVE (deprecated anyway)
398 * HIDDEN (unlikely to be supported any time soon)
399 * MIMETYPE (unlikely to be supported any time soon)
400 * QUOTA_* (will be supported in a forthcoming patch)
401 * SYSTEM (unlikely to be supported any time soon)
402 * TIME_BACKUP (unlikely to be supported any time soon)
403 * TIME_CREATE (unlikely to be supported any time soon)
404 */
405#define NFSD4_SUPPORTED_ATTRS_WORD0 \
406(FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
407 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
408 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
409 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
410 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
411 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
412 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
413 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
414 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
415 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
416
417#define NFSD4_SUPPORTED_ATTRS_WORD1 \
418(FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
419 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
420 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
421 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
422 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_CREATE \
423 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
424
425#define NFSD4_SUPPORTED_ATTRS_WORD2 0
426
427/* 4.1 */
428#ifdef CONFIG_NFSD_PNFS
429#define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES
430#define PNFSD_SUPPORTED_ATTRS_WORD2 \
431(FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES)
432#else
433#define PNFSD_SUPPORTED_ATTRS_WORD1 0
434#define PNFSD_SUPPORTED_ATTRS_WORD2 0
435#endif /* CONFIG_NFSD_PNFS */
436
437#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
438 NFSD4_SUPPORTED_ATTRS_WORD0
439
440#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
441 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1)
442
443#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
444 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \
445 FATTR4_WORD2_SUPPATTR_EXCLCREAT)
446
447/* 4.2 */
448#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
449#define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL
450#else
451#define NFSD4_2_SECURITY_ATTRS 0
452#endif
453
454#define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
455 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
456 FATTR4_WORD2_MODE_UMASK | \
457 NFSD4_2_SECURITY_ATTRS | \
458 FATTR4_WORD2_XATTR_SUPPORT | \
459 FATTR4_WORD2_TIME_DELEG_ACCESS | \
460 FATTR4_WORD2_TIME_DELEG_MODIFY | \
461 FATTR4_WORD2_OPEN_ARGUMENTS)
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(buf: netaddr->netid, fmt: "tcp");
477 netaddr->netid_len = 3;
478 break;
479 case AF_INET6:
480 port = ntohs(sin6->sin6_port);
481 sprintf(buf: netaddr->netid, fmt: "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(buf: netaddr->addr + ret_addr,
489 RPCBIND_MAXUADDRLEN + 1 - ret_addr,
490 fmt: ".%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(bm1: bmval, bm2: 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 | FATTR4_WORD2_TIME_DELEG_ACCESS \
533 | FATTR4_WORD2_TIME_DELEG_MODIFY \
534 )
535
536#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
537 NFSD_WRITEABLE_ATTRS_WORD0
538/*
539 * we currently store the exclusive create verifier in the v_{a,m}time
540 * attributes so the client can't set these at create time using EXCLUSIVE4_1
541 */
542#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
543 (NFSD_WRITEABLE_ATTRS_WORD1 & \
544 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
545#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
546 NFSD_WRITEABLE_ATTRS_WORD2
547
548extern int nfsd4_is_junction(struct dentry *dentry);
549extern int register_cld_notifier(void);
550extern void unregister_cld_notifier(void);
551#ifdef CONFIG_NFSD_V4_2_INTER_SSC
552extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn);
553#endif
554
555extern void nfsd4_init_leases_net(struct nfsd_net *nn);
556
557#else /* CONFIG_NFSD_V4 */
558static inline int nfsd4_is_junction(struct dentry *dentry)
559{
560 return 0;
561}
562
563static inline void nfsd4_init_leases_net(struct nfsd_net *nn) { };
564
565#define register_cld_notifier() 0
566#define unregister_cld_notifier() do { } while(0)
567
568#endif /* CONFIG_NFSD_V4 */
569
570#endif /* LINUX_NFSD_NFSD_H */
571

source code of linux/fs/nfsd/nfsd.h