nfsd.h 19 KB

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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. #ifndef LINUX_NFSD_NFSD_H
  9. #define LINUX_NFSD_NFSD_H
  10. #include <linux/types.h>
  11. #include <linux/mount.h>
  12. #include <linux/nfs.h>
  13. #include <linux/nfs2.h>
  14. #include <linux/nfs3.h>
  15. #include <linux/nfs4.h>
  16. #include <linux/sunrpc/svc.h>
  17. #include <linux/sunrpc/svc_xprt.h>
  18. #include <linux/sunrpc/msg_prot.h>
  19. #include <linux/sunrpc/addr.h>
  20. #include <uapi/linux/nfsd/debug.h>
  21. #include "netns.h"
  22. #include "stats.h"
  23. #include "export.h"
  24. #undef ifdebug
  25. #ifdef CONFIG_SUNRPC_DEBUG
  26. # define ifdebug(flag) if (nfsd_debug & NFSDDBG_##flag)
  27. #else
  28. # define ifdebug(flag) if (0)
  29. #endif
  30. /*
  31. * nfsd version
  32. */
  33. #define NFSD_SUPPORTED_MINOR_VERSION 2
  34. /*
  35. * Maximum blocksizes supported by daemon under various circumstances.
  36. */
  37. #define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD
  38. /* NFSv2 is limited by the protocol specification, see RFC 1094 */
  39. #define NFSSVC_MAXBLKSIZE_V2 (8*1024)
  40. /*
  41. * Largest number of bytes we need to allocate for an NFS
  42. * call or reply. Used to control buffer sizes. We use
  43. * the length of v3 WRITE, READDIR and READDIR replies
  44. * which are an RPC header, up to 26 XDR units of reply
  45. * data, and some page data.
  46. *
  47. * Note that accuracy here doesn't matter too much as the
  48. * size is rounded up to a page size when allocating space.
  49. */
  50. #define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
  51. struct readdir_cd {
  52. __be32 err; /* 0, nfserr, or nfserr_eof */
  53. };
  54. extern struct svc_program nfsd_program;
  55. extern const struct svc_version nfsd_version2, nfsd_version3,
  56. nfsd_version4;
  57. extern struct mutex nfsd_mutex;
  58. extern spinlock_t nfsd_drc_lock;
  59. extern unsigned long nfsd_drc_max_mem;
  60. extern unsigned long nfsd_drc_mem_used;
  61. extern const struct seq_operations nfs_exports_op;
  62. /*
  63. * Function prototypes.
  64. */
  65. int nfsd_svc(int nrservs, struct net *net, const struct cred *cred);
  66. int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
  67. int nfsd_nrthreads(struct net *);
  68. int nfsd_nrpools(struct net *);
  69. int nfsd_get_nrthreads(int n, int *, struct net *);
  70. int nfsd_set_nrthreads(int n, int *, struct net *);
  71. int nfsd_pool_stats_open(struct inode *, struct file *);
  72. int nfsd_pool_stats_release(struct inode *, struct file *);
  73. void nfsd_destroy(struct net *net);
  74. bool i_am_nfsd(void);
  75. int get_nfsdfs(struct net *);
  76. struct nfsdfs_client {
  77. struct kref cl_ref;
  78. void (*cl_release)(struct kref *kref);
  79. };
  80. struct nfsdfs_client *get_nfsdfs_client(struct inode *);
  81. struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
  82. struct nfsdfs_client *ncl, u32 id, const struct tree_descr *);
  83. void nfsd_client_rmdir(struct dentry *dentry);
  84. #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
  85. #ifdef CONFIG_NFSD_V2_ACL
  86. extern const struct svc_version nfsd_acl_version2;
  87. #else
  88. #define nfsd_acl_version2 NULL
  89. #endif
  90. #ifdef CONFIG_NFSD_V3_ACL
  91. extern const struct svc_version nfsd_acl_version3;
  92. #else
  93. #define nfsd_acl_version3 NULL
  94. #endif
  95. #endif
  96. struct nfsd_net;
  97. enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
  98. int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
  99. int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
  100. void nfsd_reset_versions(struct nfsd_net *nn);
  101. int nfsd_create_serv(struct net *net);
  102. extern int nfsd_max_blksize;
  103. static inline int nfsd_v4client(struct svc_rqst *rq)
  104. {
  105. return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
  106. }
  107. static inline struct user_namespace *
  108. nfsd_user_namespace(const struct svc_rqst *rqstp)
  109. {
  110. const struct cred *cred = rqstp->rq_xprt->xpt_cred;
  111. return cred ? cred->user_ns : &init_user_ns;
  112. }
  113. /*
  114. * NFSv4 State
  115. */
  116. #ifdef CONFIG_NFSD_V4
  117. extern unsigned long max_delegations;
  118. int nfsd4_init_slabs(void);
  119. void nfsd4_free_slabs(void);
  120. int nfs4_state_start(void);
  121. int nfs4_state_start_net(struct net *net);
  122. void nfs4_state_shutdown(void);
  123. void nfs4_state_shutdown_net(struct net *net);
  124. int nfs4_reset_recoverydir(char *recdir);
  125. char * nfs4_recoverydir(void);
  126. bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
  127. #else
  128. static inline int nfsd4_init_slabs(void) { return 0; }
  129. static inline void nfsd4_free_slabs(void) { }
  130. static inline int nfs4_state_start(void) { return 0; }
  131. static inline int nfs4_state_start_net(struct net *net) { return 0; }
  132. static inline void nfs4_state_shutdown(void) { }
  133. static inline void nfs4_state_shutdown_net(struct net *net) { }
  134. static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
  135. static inline char * nfs4_recoverydir(void) {return NULL; }
  136. static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
  137. {
  138. return false;
  139. }
  140. #endif
  141. /*
  142. * lockd binding
  143. */
  144. void nfsd_lockd_init(void);
  145. void nfsd_lockd_shutdown(void);
  146. /*
  147. * These macros provide pre-xdr'ed values for faster operation.
  148. */
  149. #define nfs_ok cpu_to_be32(NFS_OK)
  150. #define nfserr_perm cpu_to_be32(NFSERR_PERM)
  151. #define nfserr_noent cpu_to_be32(NFSERR_NOENT)
  152. #define nfserr_io cpu_to_be32(NFSERR_IO)
  153. #define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
  154. #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
  155. #define nfserr_acces cpu_to_be32(NFSERR_ACCES)
  156. #define nfserr_exist cpu_to_be32(NFSERR_EXIST)
  157. #define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
  158. #define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
  159. #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
  160. #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
  161. #define nfserr_inval cpu_to_be32(NFSERR_INVAL)
  162. #define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
  163. #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
  164. #define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
  165. #define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
  166. #define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
  167. #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
  168. #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
  169. #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
  170. #define nfserr_stale cpu_to_be32(NFSERR_STALE)
  171. #define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
  172. #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
  173. #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
  174. #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
  175. #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
  176. #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
  177. #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
  178. #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
  179. #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
  180. #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
  181. #define nfserr_denied cpu_to_be32(NFSERR_DENIED)
  182. #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
  183. #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
  184. #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
  185. #define nfserr_same cpu_to_be32(NFSERR_SAME)
  186. #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
  187. #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
  188. #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
  189. #define nfserr_moved cpu_to_be32(NFSERR_MOVED)
  190. #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
  191. #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
  192. #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
  193. #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
  194. #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
  195. #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
  196. #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
  197. #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
  198. #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
  199. #define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
  200. #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
  201. #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
  202. #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
  203. #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
  204. #define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
  205. #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
  206. #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
  207. #define nfserr_grace cpu_to_be32(NFSERR_GRACE)
  208. #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
  209. #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
  210. #define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
  211. #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
  212. #define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
  213. #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
  214. #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
  215. #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
  216. #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
  217. #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
  218. #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
  219. #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
  220. #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
  221. #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
  222. #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
  223. #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
  224. #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
  225. #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
  226. #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
  227. #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
  228. #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
  229. #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
  230. #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
  231. #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
  232. #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
  233. #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
  234. #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
  235. #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
  236. #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
  237. #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
  238. #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
  239. #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
  240. #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
  241. #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
  242. #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
  243. #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
  244. #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
  245. #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
  246. #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
  247. #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
  248. #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
  249. #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
  250. #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
  251. #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
  252. #define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
  253. #define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
  254. #define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
  255. #define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
  256. #define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
  257. #define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
  258. #define nfserr_file_open cpu_to_be32(NFS4ERR_FILE_OPEN)
  259. #define nfserr_xattr2big cpu_to_be32(NFS4ERR_XATTR2BIG)
  260. #define nfserr_noxattr cpu_to_be32(NFS4ERR_NOXATTR)
  261. /* error codes for internal use */
  262. /* if a request fails due to kmalloc failure, it gets dropped.
  263. * Client should resend eventually
  264. */
  265. #define nfserr_dropit cpu_to_be32(30000)
  266. /* end-of-file indicator in readdir */
  267. #define nfserr_eof cpu_to_be32(30001)
  268. /* replay detected */
  269. #define nfserr_replay_me cpu_to_be32(11001)
  270. /* nfs41 replay detected */
  271. #define nfserr_replay_cache cpu_to_be32(11002)
  272. /* Check for dir entries '.' and '..' */
  273. #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
  274. #ifdef CONFIG_NFSD_V4
  275. /* before processing a COMPOUND operation, we have to check that there
  276. * is enough space in the buffer for XDR encode to succeed. otherwise,
  277. * we might process an operation with side effects, and be unable to
  278. * tell the client that the operation succeeded.
  279. *
  280. * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
  281. * needed to encode an "ordinary" _successful_ operation. (GETATTR,
  282. * READ, READDIR, and READLINK have their own buffer checks.) if we
  283. * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
  284. *
  285. * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
  286. * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
  287. * care is taken to ensure that we never fall below this level for any
  288. * reason.
  289. */
  290. #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
  291. #define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */
  292. #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
  293. /*
  294. * The following attributes are currently not supported by the NFSv4 server:
  295. * ARCHIVE (deprecated anyway)
  296. * HIDDEN (unlikely to be supported any time soon)
  297. * MIMETYPE (unlikely to be supported any time soon)
  298. * QUOTA_* (will be supported in a forthcoming patch)
  299. * SYSTEM (unlikely to be supported any time soon)
  300. * TIME_BACKUP (unlikely to be supported any time soon)
  301. * TIME_CREATE (unlikely to be supported any time soon)
  302. */
  303. #define NFSD4_SUPPORTED_ATTRS_WORD0 \
  304. (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
  305. | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
  306. | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
  307. | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
  308. | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
  309. | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
  310. | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
  311. | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
  312. | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
  313. | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
  314. #define NFSD4_SUPPORTED_ATTRS_WORD1 \
  315. (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
  316. | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
  317. | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
  318. | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
  319. | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \
  320. | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
  321. #define NFSD4_SUPPORTED_ATTRS_WORD2 0
  322. /* 4.1 */
  323. #ifdef CONFIG_NFSD_PNFS
  324. #define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES
  325. #define PNFSD_SUPPORTED_ATTRS_WORD2 \
  326. (FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES)
  327. #else
  328. #define PNFSD_SUPPORTED_ATTRS_WORD1 0
  329. #define PNFSD_SUPPORTED_ATTRS_WORD2 0
  330. #endif /* CONFIG_NFSD_PNFS */
  331. #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
  332. NFSD4_SUPPORTED_ATTRS_WORD0
  333. #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
  334. (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1)
  335. #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
  336. (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \
  337. FATTR4_WORD2_SUPPATTR_EXCLCREAT)
  338. /* 4.2 */
  339. #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
  340. #define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL
  341. #else
  342. #define NFSD4_2_SECURITY_ATTRS 0
  343. #endif
  344. #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
  345. (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
  346. FATTR4_WORD2_CHANGE_ATTR_TYPE | \
  347. FATTR4_WORD2_MODE_UMASK | \
  348. NFSD4_2_SECURITY_ATTRS | \
  349. FATTR4_WORD2_XATTR_SUPPORT)
  350. extern const u32 nfsd_suppattrs[3][3];
  351. static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr,
  352. struct nfs42_netaddr *netaddr)
  353. {
  354. struct sockaddr_in *sin = (struct sockaddr_in *)addr;
  355. struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
  356. unsigned int port;
  357. size_t ret_addr, ret_port;
  358. switch (addr->sa_family) {
  359. case AF_INET:
  360. port = ntohs(sin->sin_port);
  361. sprintf(netaddr->netid, "tcp");
  362. netaddr->netid_len = 3;
  363. break;
  364. case AF_INET6:
  365. port = ntohs(sin6->sin6_port);
  366. sprintf(netaddr->netid, "tcp6");
  367. netaddr->netid_len = 4;
  368. break;
  369. default:
  370. return nfserr_inval;
  371. }
  372. ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr));
  373. ret_port = snprintf(netaddr->addr + ret_addr,
  374. RPCBIND_MAXUADDRLEN + 1 - ret_addr,
  375. ".%u.%u", port >> 8, port & 0xff);
  376. WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr);
  377. netaddr->addr_len = ret_addr + ret_port;
  378. return 0;
  379. }
  380. static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
  381. {
  382. return !((bm1[0] & ~bm2[0]) ||
  383. (bm1[1] & ~bm2[1]) ||
  384. (bm1[2] & ~bm2[2]));
  385. }
  386. static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
  387. {
  388. return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
  389. }
  390. /* These will return ERR_INVAL if specified in GETATTR or READDIR. */
  391. #define NFSD_WRITEONLY_ATTRS_WORD1 \
  392. (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
  393. /*
  394. * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
  395. * a writeable attribute here without also adding code to parse it to
  396. * nfsd4_decode_fattr().
  397. */
  398. #define NFSD_WRITEABLE_ATTRS_WORD0 \
  399. (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
  400. #define NFSD_WRITEABLE_ATTRS_WORD1 \
  401. (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
  402. | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
  403. #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
  404. #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
  405. FATTR4_WORD2_SECURITY_LABEL
  406. #else
  407. #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
  408. #endif
  409. #define NFSD_WRITEABLE_ATTRS_WORD2 \
  410. (FATTR4_WORD2_MODE_UMASK \
  411. | MAYBE_FATTR4_WORD2_SECURITY_LABEL)
  412. #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
  413. NFSD_WRITEABLE_ATTRS_WORD0
  414. /*
  415. * we currently store the exclusive create verifier in the v_{a,m}time
  416. * attributes so the client can't set these at create time using EXCLUSIVE4_1
  417. */
  418. #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
  419. (NFSD_WRITEABLE_ATTRS_WORD1 & \
  420. ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
  421. #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
  422. NFSD_WRITEABLE_ATTRS_WORD2
  423. extern int nfsd4_is_junction(struct dentry *dentry);
  424. extern int register_cld_notifier(void);
  425. extern void unregister_cld_notifier(void);
  426. #else /* CONFIG_NFSD_V4 */
  427. static inline int nfsd4_is_junction(struct dentry *dentry)
  428. {
  429. return 0;
  430. }
  431. #define register_cld_notifier() 0
  432. #define unregister_cld_notifier() do { } while(0)
  433. #endif /* CONFIG_NFSD_V4 */
  434. #endif /* LINUX_NFSD_NFSD_H */