1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2f7b422b1SDavid Howells /* 3f7b422b1SDavid Howells * NFS internal definitions 4f7b422b1SDavid Howells */ 5f7b422b1SDavid Howells 6eedc020eSAndy Adamson #include "nfs4_fs.h" 7f7b422b1SDavid Howells #include <linux/mount.h> 8f9c3a380SEric Paris #include <linux/security.h> 91264a2f0STrond Myklebust #include <linux/crc32.h> 109954bf92SDavid Howells #include <linux/sunrpc/addr.h> 1147af81f2SPeng Tao #include <linux/nfs_page.h> 125dd43ce2SIngo Molnar #include <linux/wait_bit.h> 13f7b422b1SDavid Howells 141751e8a6SLinus Torvalds #define NFS_MS_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS) 1508734048SDavid Howells 1620fa1902SPeng Tao extern const struct export_operations nfs_export_ops; 1720fa1902SPeng Tao 1854ceac45SDavid Howells struct nfs_string; 1954ceac45SDavid Howells 207ebb9315SBryan Schumaker static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) 217ebb9315SBryan Schumaker { 227ebb9315SBryan Schumaker if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid)) 237ebb9315SBryan Schumaker fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT; 247ebb9315SBryan Schumaker } 257ebb9315SBryan Schumaker 26533eb461SAndy Adamson static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) 27533eb461SAndy Adamson { 28533eb461SAndy Adamson if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) || 29533eb461SAndy Adamson (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) && 30533eb461SAndy Adamson ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0))) 31533eb461SAndy Adamson return 0; 32533eb461SAndy Adamson return 1; 33533eb461SAndy Adamson } 34533eb461SAndy Adamson 35f7b422b1SDavid Howells struct nfs_clone_mount { 36f7b422b1SDavid Howells const struct super_block *sb; 37f7b422b1SDavid Howells const struct dentry *dentry; 38f7b422b1SDavid Howells char *hostname; 39f7b422b1SDavid Howells char *mnt_path; 406677d095SChuck Lever struct sockaddr *addr; 416677d095SChuck Lever size_t addrlen; 42f7b422b1SDavid Howells rpc_authflavor_t authflavor; 43f7b422b1SDavid Howells }; 44f7b422b1SDavid Howells 456b18eaa0S\"Talpey, Thomas\ /* 46a14017dbSChuck Lever * Note: RFC 1813 doesn't limit the number of auth flavors that 47a14017dbSChuck Lever * a server can return, so make something up. 48a14017dbSChuck Lever */ 49a14017dbSChuck Lever #define NFS_MAX_SECFLAVORS (12) 50a14017dbSChuck Lever 51a14017dbSChuck Lever /* 524cfd74fcSChuck Lever * Value used if the user did not specify a port value. 534cfd74fcSChuck Lever */ 544cfd74fcSChuck Lever #define NFS_UNSPEC_PORT (-1) 554cfd74fcSChuck Lever 56a956bedaSTrond Myklebust #define NFS_UNSPEC_RETRANS (UINT_MAX) 57a956bedaSTrond Myklebust #define NFS_UNSPEC_TIMEO (UINT_MAX) 58a956bedaSTrond Myklebust 594cfd74fcSChuck Lever /* 6056e4ebf8SBryan Schumaker * Maximum number of pages that readdir can use for creating 6156e4ebf8SBryan Schumaker * a vmapped array of pages. 6256e4ebf8SBryan Schumaker */ 63db531db9SMax Kellermann #define NFS_MAX_READDIR_PAGES 8 6456e4ebf8SBryan Schumaker 65fcf10398SBryan Schumaker struct nfs_client_initdata { 66fcf10398SBryan Schumaker unsigned long init_flags; 675c6e5b60STrond Myklebust const char *hostname; /* Hostname of the server */ 685c6e5b60STrond Myklebust const struct sockaddr *addr; /* Address of the server */ 695c6e5b60STrond Myklebust const char *nodename; /* Hostname of the client */ 705c6e5b60STrond Myklebust const char *ip_addr; /* IP address of the client */ 71fcf10398SBryan Schumaker size_t addrlen; 72ab7017a3SBryan Schumaker struct nfs_subversion *nfs_mod; 73fcf10398SBryan Schumaker int proto; 74fcf10398SBryan Schumaker u32 minorversion; 756619079dSTrond Myklebust unsigned int nconnect; 76fcf10398SBryan Schumaker struct net *net; 775c6e5b60STrond Myklebust const struct rpc_timeout *timeparms; 781a58e8a0STrond Myklebust const struct cred *cred; 79fcf10398SBryan Schumaker }; 80fcf10398SBryan Schumaker 8156e4ebf8SBryan Schumaker /* 826b18eaa0S\"Talpey, Thomas\ * In-kernel mount arguments 836b18eaa0S\"Talpey, Thomas\ */ 846b18eaa0S\"Talpey, Thomas\ struct nfs_parsed_mount_data { 856b18eaa0S\"Talpey, Thomas\ int flags; 868cb7f74eSChuck Lever unsigned int rsize, wsize; 878cb7f74eSChuck Lever unsigned int timeo, retrans; 888cb7f74eSChuck Lever unsigned int acregmin, acregmax, 896b18eaa0S\"Talpey, Thomas\ acdirmin, acdirmax; 908cb7f74eSChuck Lever unsigned int namlen; 91b797cac7SDavid Howells unsigned int options; 926b18eaa0S\"Talpey, Thomas\ unsigned int bsize; 93a3f73c27SWeston Andros Adamson struct nfs_auth_info auth_info; 94a3f73c27SWeston Andros Adamson rpc_authflavor_t selected_flavor; 956b18eaa0S\"Talpey, Thomas\ char *client_address; 96764302ccSChuck Lever unsigned int version; 973fd5be9eSMike Sager unsigned int minorversion; 9808734048SDavid Howells char *fscache_uniq; 99b72e4f42SBryan Schumaker bool need_mount; 1006b18eaa0S\"Talpey, Thomas\ 1016b18eaa0S\"Talpey, Thomas\ struct { 1024c568017SChuck Lever struct sockaddr_storage address; 1034c568017SChuck Lever size_t addrlen; 1046b18eaa0S\"Talpey, Thomas\ char *hostname; 10578fa701fSChuck Lever u32 version; 1064cfd74fcSChuck Lever int port; 10778fa701fSChuck Lever unsigned short protocol; 1086b18eaa0S\"Talpey, Thomas\ } mount_server; 1096b18eaa0S\"Talpey, Thomas\ 1106b18eaa0S\"Talpey, Thomas\ struct { 1114c568017SChuck Lever struct sockaddr_storage address; 1124c568017SChuck Lever size_t addrlen; 1136b18eaa0S\"Talpey, Thomas\ char *hostname; 1146b18eaa0S\"Talpey, Thomas\ char *export_path; 1154cfd74fcSChuck Lever int port; 11678fa701fSChuck Lever unsigned short protocol; 11728cc5cd8STrond Myklebust unsigned short nconnect; 1186b18eaa0S\"Talpey, Thomas\ } nfs_server; 119f9c3a380SEric Paris 120204cc0ccSAl Viro void *lsm_opts; 121e50a7a1aSStanislav Kinsbursky struct net *net; 1226b18eaa0S\"Talpey, Thomas\ }; 1236b18eaa0S\"Talpey, Thomas\ 124146ec944SChuck Lever /* mount_clnt.c */ 125c5d120f8SChuck Lever struct nfs_mount_request { 126c5d120f8SChuck Lever struct sockaddr *sap; 127c5d120f8SChuck Lever size_t salen; 128c5d120f8SChuck Lever char *hostname; 129c5d120f8SChuck Lever char *dirpath; 130c5d120f8SChuck Lever u32 version; 131c5d120f8SChuck Lever unsigned short protocol; 132c5d120f8SChuck Lever struct nfs_fh *fh; 13350a737f8SChuck Lever int noresvport; 1348e02f6b9SChuck Lever unsigned int *auth_flav_len; 1358e02f6b9SChuck Lever rpc_authflavor_t *auth_flavs; 1366d59b8d5SStanislav Kinsbursky struct net *net; 137c5d120f8SChuck Lever }; 138c5d120f8SChuck Lever 139fbdefd64SBryan Schumaker struct nfs_mount_info { 140ab88dca3SAl Viro unsigned int inherited_bsize; 141fbdefd64SBryan Schumaker struct nfs_parsed_mount_data *parsed; 142fbdefd64SBryan Schumaker struct nfs_clone_mount *cloned; 143d0b779d4SAl Viro struct nfs_server *server; 144fbdefd64SBryan Schumaker struct nfs_fh *mntfh; 1456a3f7a39SAl Viro struct nfs_subversion *nfs_mod; 146fbdefd64SBryan Schumaker }; 147fbdefd64SBryan Schumaker 148c5d120f8SChuck Lever extern int nfs_mount(struct nfs_mount_request *info); 1490b524123SChuck Lever extern void nfs_umount(const struct nfs_mount_request *info); 150146ec944SChuck Lever 15124c8dbbbSDavid Howells /* client.c */ 152a613fa16STrond Myklebust extern const struct rpc_program nfs_program; 1536b13168bSStanislav Kinsbursky extern void nfs_clients_init(struct net *net); 15410b7a70cSTrond Myklebust extern void nfs_clients_exit(struct net *net); 1556663ee7fSBryan Schumaker extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); 1565c6e5b60STrond Myklebust int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t); 1577d38de3fSAnna Schumaker struct nfs_client *nfs_get_client(const struct nfs_client_initdata *); 158fcf10398SBryan Schumaker int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); 159fcf10398SBryan Schumaker void nfs_server_insert_lists(struct nfs_server *); 16032e62b7cSChuck Lever void nfs_server_remove_lists(struct nfs_server *); 161a956bedaSTrond Myklebust void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans); 162fcf10398SBryan Schumaker int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, 163fcf10398SBryan Schumaker rpc_authflavor_t); 164fcf10398SBryan Schumaker struct nfs_server *nfs_alloc_server(void); 165fcf10398SBryan Schumaker void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); 16654ceac45SDavid Howells 16724c8dbbbSDavid Howells extern void nfs_put_client(struct nfs_client *); 168cdb7ecedSBryan Schumaker extern void nfs_free_client(struct nfs_client *); 16928cd1b3fSStanislav Kinsbursky extern struct nfs_client *nfs4_find_client_ident(struct net *, int); 170c36fca52SAndy Adamson extern struct nfs_client * 171c7add9a9SStanislav Kinsbursky nfs4_find_client_sessionid(struct net *, const struct sockaddr *, 172459de2edSBryan Schumaker struct nfs4_sessionid *, u32); 1730c38f213SAl Viro extern struct nfs_server *nfs_create_server(struct nfs_mount_info *); 1740c38f213SAl Viro extern struct nfs_server *nfs4_create_server(struct nfs_mount_info *); 17554ceac45SDavid Howells extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, 17654ceac45SDavid Howells struct nfs_fh *); 17732e62b7cSChuck Lever extern int nfs4_update_server(struct nfs_server *server, const char *hostname, 178292f503cSTrond Myklebust struct sockaddr *sap, size_t salen, 179292f503cSTrond Myklebust struct net *net); 18054ceac45SDavid Howells extern void nfs_free_server(struct nfs_server *server); 18154ceac45SDavid Howells extern struct nfs_server *nfs_clone_server(struct nfs_server *, 18254ceac45SDavid Howells struct nfs_fh *, 1837e6eb683SBryan Schumaker struct nfs_fattr *, 1847e6eb683SBryan Schumaker rpc_authflavor_t); 185a33e4b03SWeston Andros Adamson extern bool nfs_client_init_is_complete(const struct nfs_client *clp); 186a33e4b03SWeston Andros Adamson extern int nfs_client_init_status(const struct nfs_client *clp); 1874697bd5eSTrond Myklebust extern int nfs_wait_client_init_complete(const struct nfs_client *clp); 18876db6d95SAndy Adamson extern void nfs_mark_client_ready(struct nfs_client *clp, int state); 1893fc75f12STigran Mkrtchyan extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, 190d83217c1SAndy Adamson const struct sockaddr *ds_addr, 19198fc685aSAndy Adamson int ds_addrlen, int ds_proto, 19298fc685aSAndy Adamson unsigned int ds_timeo, 193064172f3SPeng Tao unsigned int ds_retrans, 1947d38de3fSAnna Schumaker u32 minor_version); 1950e20162eSAndy Adamson extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, 1960e20162eSAndy Adamson struct inode *); 197b224f7cbSTigran Mkrtchyan extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, 1981a04c6e1SPeng Tao const struct sockaddr *ds_addr, int ds_addrlen, 1991a04c6e1SPeng Tao int ds_proto, unsigned int ds_timeo, 2007d38de3fSAnna Schumaker unsigned int ds_retrans); 2016aaca566SDavid Howells #ifdef CONFIG_PROC_FS 2026aaca566SDavid Howells extern int __init nfs_fs_proc_init(void); 2036aaca566SDavid Howells extern void nfs_fs_proc_exit(void); 20465b38851SEric W. Biederman extern int nfs_fs_proc_net_init(struct net *net); 20565b38851SEric W. Biederman extern void nfs_fs_proc_net_exit(struct net *net); 2066aaca566SDavid Howells #else 20765b38851SEric W. Biederman static inline int nfs_fs_proc_net_init(struct net *net) 20865b38851SEric W. Biederman { 20965b38851SEric W. Biederman return 0; 21065b38851SEric W. Biederman } 21165b38851SEric W. Biederman static inline void nfs_fs_proc_net_exit(struct net *net) 21265b38851SEric W. Biederman { 21365b38851SEric W. Biederman } 2146aaca566SDavid Howells static inline int nfs_fs_proc_init(void) 2156aaca566SDavid Howells { 2166aaca566SDavid Howells return 0; 2176aaca566SDavid Howells } 2186aaca566SDavid Howells static inline void nfs_fs_proc_exit(void) 2196aaca566SDavid Howells { 2206aaca566SDavid Howells } 2216aaca566SDavid Howells #endif 22224c8dbbbSDavid Howells 223f7b422b1SDavid Howells /* callback_xdr.c */ 224e9679189SChristoph Hellwig extern const struct svc_version nfs4_callback_version1; 225e9679189SChristoph Hellwig extern const struct svc_version nfs4_callback_version4; 226f7b422b1SDavid Howells 2274db6e0b7SFred Isaman struct nfs_pageio_descriptor; 2289954bf92SDavid Howells 2299954bf92SDavid Howells /* mount.c */ 2309954bf92SDavid Howells #define NFS_TEXT_DATA 1 2319954bf92SDavid Howells 2329954bf92SDavid Howells extern struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void); 2339954bf92SDavid Howells extern void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data); 2349954bf92SDavid Howells extern int nfs_parse_mount_options(char *raw, struct nfs_parsed_mount_data *mnt); 2359954bf92SDavid Howells extern int nfs_validate_mount_data(struct file_system_type *fs_type, 2369954bf92SDavid Howells void *options, 2379954bf92SDavid Howells struct nfs_parsed_mount_data *args, 2389954bf92SDavid Howells struct nfs_fh *mntfh, 2399954bf92SDavid Howells const char *dev_name); 2409954bf92SDavid Howells extern int nfs_validate_text_mount_data(void *options, 2419954bf92SDavid Howells struct nfs_parsed_mount_data *args, 2429954bf92SDavid Howells const char *dev_name); 2439954bf92SDavid Howells 244f7b422b1SDavid Howells /* pagelist.c */ 245f7b422b1SDavid Howells extern int __init nfs_init_nfspagecache(void); 246266bee88SDavid Brownell extern void nfs_destroy_nfspagecache(void); 247f7b422b1SDavid Howells extern int __init nfs_init_readpagecache(void); 248266bee88SDavid Brownell extern void nfs_destroy_readpagecache(void); 249f7b422b1SDavid Howells extern int __init nfs_init_writepagecache(void); 250266bee88SDavid Brownell extern void nfs_destroy_writepagecache(void); 251f7b422b1SDavid Howells 252f7b422b1SDavid Howells extern int __init nfs_init_directcache(void); 253266bee88SDavid Brownell extern void nfs_destroy_directcache(void); 2544db6e0b7SFred Isaman extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 2554db6e0b7SFred Isaman struct nfs_pgio_header *hdr, 2564db6e0b7SFred Isaman void (*release)(struct nfs_pgio_header *hdr)); 2574db6e0b7SFred Isaman void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 258210c7c17SBenjamin Coddington int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); 259577b4232STrond Myklebust 26041d8d5b7SAnna Schumaker extern const struct nfs_pageio_ops nfs_pgio_rw_ops; 2611e7f3a48SWeston Andros Adamson struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); 2621e7f3a48SWeston Andros Adamson void nfs_pgio_header_free(struct nfs_pgio_header *); 263ef2c488cSAnna Schumaker int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); 26446a5ab47SPeng Tao int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, 265a52458b4SNeilBrown const struct cred *cred, const struct nfs_rpc_ops *rpc_ops, 26646a5ab47SPeng Tao const struct rpc_call_ops *call_ops, int how, int flags); 267d4581383SWeston Andros Adamson void nfs_free_request(struct nfs_page *req); 26848d635f1SPeng Tao struct nfs_pgio_mirror * 26948d635f1SPeng Tao nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); 27000bfa30aSAnna Schumaker 27147af81f2SPeng Tao static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc) 27247af81f2SPeng Tao { 27347af81f2SPeng Tao WARN_ON_ONCE(desc->pg_mirror_count < 1); 27447af81f2SPeng Tao return desc->pg_mirror_count > 1; 27547af81f2SPeng Tao } 27647af81f2SPeng Tao 277138a2935STrond Myklebust static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, 278138a2935STrond Myklebust const struct nfs_open_context *ctx2) 279138a2935STrond Myklebust { 280a52458b4SNeilBrown return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state; 281138a2935STrond Myklebust } 282138a2935STrond Myklebust 283f7b422b1SDavid Howells /* nfs2xdr.c */ 284499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs_procedures[]; 285573c4e1eSChuck Lever extern int nfs2_decode_dirent(struct xdr_stream *, 286a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 287f7b422b1SDavid Howells 288f7b422b1SDavid Howells /* nfs3xdr.c */ 289499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs3_procedures[]; 290573c4e1eSChuck Lever extern int nfs3_decode_dirent(struct xdr_stream *, 291a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 292f7b422b1SDavid Howells 293f7b422b1SDavid Howells /* nfs4xdr.c */ 29489d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 295573c4e1eSChuck Lever extern int nfs4_decode_dirent(struct xdr_stream *, 296a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 2977d4e2747SDavid Howells #endif 2982449ea2eSAlexandros Batsakis #ifdef CONFIG_NFS_V4_1 2992449ea2eSAlexandros Batsakis extern const u32 nfs41_maxread_overhead; 3002449ea2eSAlexandros Batsakis extern const u32 nfs41_maxwrite_overhead; 301f1c097beSAndy Adamson extern const u32 nfs41_maxgetdevinfo_overhead; 3022449ea2eSAlexandros Batsakis #endif 303f7b422b1SDavid Howells 304f7b422b1SDavid Howells /* nfs4proc.c */ 30589d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 306499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs4_procedures[]; 307d75d5414SAndrew Morton #endif 308f7b422b1SDavid Howells 309694e096fSAnna Schumaker #ifdef CONFIG_NFS_V4_SECURITY_LABEL 310694e096fSAnna Schumaker extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); 311a49c2691SKinglong Mee static inline struct nfs4_label * 312a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 313a49c2691SKinglong Mee { 314a49c2691SKinglong Mee if (!dst || !src) 315a49c2691SKinglong Mee return NULL; 316a49c2691SKinglong Mee 317a49c2691SKinglong Mee if (src->len > NFS4_MAXLABELLEN) 318a49c2691SKinglong Mee return NULL; 319a49c2691SKinglong Mee 320a49c2691SKinglong Mee dst->lfs = src->lfs; 321a49c2691SKinglong Mee dst->pi = src->pi; 322a49c2691SKinglong Mee dst->len = src->len; 323a49c2691SKinglong Mee memcpy(dst->label, src->label, src->len); 324a49c2691SKinglong Mee 325a49c2691SKinglong Mee return dst; 326a49c2691SKinglong Mee } 327694e096fSAnna Schumaker static inline void nfs4_label_free(struct nfs4_label *label) 328694e096fSAnna Schumaker { 329694e096fSAnna Schumaker if (label) { 330694e096fSAnna Schumaker kfree(label->label); 331694e096fSAnna Schumaker kfree(label); 332694e096fSAnna Schumaker } 333694e096fSAnna Schumaker return; 334694e096fSAnna Schumaker } 335fd1defc2STrond Myklebust 336fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 337fd1defc2STrond Myklebust { 338fd1defc2STrond Myklebust if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) 339fd1defc2STrond Myklebust nfsi->cache_validity |= NFS_INO_INVALID_LABEL; 340fd1defc2STrond Myklebust } 341694e096fSAnna Schumaker #else 342694e096fSAnna Schumaker static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } 343694e096fSAnna Schumaker static inline void nfs4_label_free(void *label) {} 344fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 345fd1defc2STrond Myklebust { 346fd1defc2STrond Myklebust } 347a49c2691SKinglong Mee static inline struct nfs4_label * 348a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 349a49c2691SKinglong Mee { 350a49c2691SKinglong Mee return NULL; 351a49c2691SKinglong Mee } 352694e096fSAnna Schumaker #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 353694e096fSAnna Schumaker 3547fe5c398STrond Myklebust /* proc.c */ 3557fe5c398STrond Myklebust void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 3568cab4c39SChuck Lever extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 3575c6e5b60STrond Myklebust const struct nfs_client_initdata *); 3587fe5c398STrond Myklebust 359979df72eSTrond Myklebust /* dir.c */ 3601bcf4c5cSTrond Myklebust extern void nfs_advise_use_readdirplus(struct inode *dir); 361311324adSTrond Myklebust extern void nfs_force_use_readdirplus(struct inode *dir); 3621ab6c499SDave Chinner extern unsigned long nfs_access_cache_count(struct shrinker *shrink, 3631ab6c499SDave Chinner struct shrink_control *sc); 3641ab6c499SDave Chinner extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, 3651495f230SYing Han struct shrink_control *sc); 366597d9289SBryan Schumaker struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 367597d9289SBryan Schumaker int nfs_create(struct inode *, struct dentry *, umode_t, bool); 368597d9289SBryan Schumaker int nfs_mkdir(struct inode *, struct dentry *, umode_t); 369597d9289SBryan Schumaker int nfs_rmdir(struct inode *, struct dentry *); 370597d9289SBryan Schumaker int nfs_unlink(struct inode *, struct dentry *); 371597d9289SBryan Schumaker int nfs_symlink(struct inode *, struct dentry *, const char *); 372597d9289SBryan Schumaker int nfs_link(struct dentry *, struct inode *, struct dentry *); 373597d9289SBryan Schumaker int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); 3741cd66c93SMiklos Szeredi int nfs_rename(struct inode *, struct dentry *, 3751cd66c93SMiklos Szeredi struct inode *, struct dentry *, unsigned int); 376979df72eSTrond Myklebust 377ce4ef7c0SBryan Schumaker /* file.c */ 3784ff79bc7SChristoph Hellwig int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 379ce4ef7c0SBryan Schumaker loff_t nfs_file_llseek(struct file *, loff_t, int); 3803aa2d199SAl Viro ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); 381ce4ef7c0SBryan Schumaker int nfs_file_mmap(struct file *, struct vm_area_struct *); 382edaf4369SAl Viro ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); 383ce4ef7c0SBryan Schumaker int nfs_file_release(struct inode *, struct file *); 384ce4ef7c0SBryan Schumaker int nfs_lock(struct file *, int, struct file_lock *); 385ce4ef7c0SBryan Schumaker int nfs_flock(struct file *, int, struct file_lock *); 386ce4ef7c0SBryan Schumaker int nfs_check_flags(int); 387ce4ef7c0SBryan Schumaker 388f7b422b1SDavid Howells /* inode.c */ 3895746006fSTrond Myklebust extern struct workqueue_struct *nfsiod_workqueue; 390f7b422b1SDavid Howells extern struct inode *nfs_alloc_inode(struct super_block *sb); 391ca1a199eSAl Viro extern void nfs_free_inode(struct inode *); 392a9185b41SChristoph Hellwig extern int nfs_write_inode(struct inode *, struct writeback_control *); 393eed99357STrond Myklebust extern int nfs_drop_inode(struct inode *); 39419d87ca3SBryan Schumaker extern void nfs_clear_inode(struct inode *); 395b57922d9SAl Viro extern void nfs_evict_inode(struct inode *); 396f41f7418STrond Myklebust void nfs_zap_acl_cache(struct inode *inode); 39761540bf6STrond Myklebust extern bool nfs_check_cache_invalid(struct inode *, unsigned long); 398dfd01f02SPeter Zijlstra extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); 3995e4def20SDavid Howells extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode); 400f7b422b1SDavid Howells 401f7b422b1SDavid Howells /* super.c */ 4026a74490dSBryan Schumaker extern const struct super_operations nfs_sops; 403ab7017a3SBryan Schumaker extern struct file_system_type nfs_fs_type; 40482eaed2bSAl Viro extern struct file_system_type nfs_prepared_fs_type; 40589d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 40654ceac45SDavid Howells extern struct file_system_type nfs4_referral_fs_type; 407f7b422b1SDavid Howells #endif 4084d4b69ddSWeston Andros Adamson bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); 409a55d3297SAl Viro struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *); 410fbdefd64SBryan Schumaker struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); 411fbdefd64SBryan Schumaker void nfs_kill_super(struct super_block *); 4124ebd9ab3SDominik Hackl 413f7b422b1SDavid Howells extern struct rpc_stat nfs_rpcstat; 4144ebd9ab3SDominik Hackl 415f7b422b1SDavid Howells extern int __init register_nfs_fs(void); 416f7b422b1SDavid Howells extern void __exit unregister_nfs_fs(void); 417ea7c38feSTrond Myklebust extern bool nfs_sb_active(struct super_block *sb); 4181daef0a8STrond Myklebust extern void nfs_sb_deactive(struct super_block *sb); 419f7b422b1SDavid Howells 420a5864c99STrond Myklebust /* io.c */ 421a5864c99STrond Myklebust extern void nfs_start_io_read(struct inode *inode); 422a5864c99STrond Myklebust extern void nfs_end_io_read(struct inode *inode); 423a5864c99STrond Myklebust extern void nfs_start_io_write(struct inode *inode); 424a5864c99STrond Myklebust extern void nfs_end_io_write(struct inode *inode); 425a5864c99STrond Myklebust extern void nfs_start_io_direct(struct inode *inode); 426a5864c99STrond Myklebust extern void nfs_end_io_direct(struct inode *inode); 427a5864c99STrond Myklebust 428651b0e70STrond Myklebust static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) 429651b0e70STrond Myklebust { 430651b0e70STrond Myklebust return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0; 431651b0e70STrond Myklebust } 432651b0e70STrond Myklebust 433f7b422b1SDavid Howells /* namespace.c */ 43497a54868SBen Hutchings #define NFS_PATH_CANONICAL 1 435b514f872SAl Viro extern char *nfs_path(char **p, struct dentry *dentry, 43697a54868SBen Hutchings char *buffer, ssize_t buflen, unsigned flags); 43736d43a43SDavid Howells extern struct vfsmount *nfs_d_automount(struct path *path); 438281cad46SBryan Schumaker struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, 439281cad46SBryan Schumaker struct nfs_fh *, struct nfs_fattr *); 440281cad46SBryan Schumaker struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, 441281cad46SBryan Schumaker struct nfs_fattr *, rpc_authflavor_t); 442f7b422b1SDavid Howells 44354ceac45SDavid Howells /* getroot.c */ 4440d5839adSAl Viro extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, 4450d5839adSAl Viro const char *); 44689d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 4470d5839adSAl Viro extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, 4480d5839adSAl Viro const char *); 44954ceac45SDavid Howells 4505e6b1990STrond Myklebust extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); 4517d4e2747SDavid Howells #endif 452f7b422b1SDavid Howells 453061ae2edSFred Isaman struct nfs_pgio_completion_ops; 454f11c88afSAndy Adamson /* read.c */ 455584aa810SFred Isaman extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 456fab5fc25SChristoph Hellwig struct inode *inode, bool force_mds, 457584aa810SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 458f11c88afSAndy Adamson extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 459493292ddSTrond Myklebust extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 460e885de1aSTrond Myklebust 461fbdefd64SBryan Schumaker /* super.c */ 462fbdefd64SBryan Schumaker void nfs_umount_begin(struct super_block *); 463fbdefd64SBryan Schumaker int nfs_statfs(struct dentry *, struct kstatfs *); 464fbdefd64SBryan Schumaker int nfs_show_options(struct seq_file *, struct dentry *); 465fbdefd64SBryan Schumaker int nfs_show_devname(struct seq_file *, struct dentry *); 466fbdefd64SBryan Schumaker int nfs_show_path(struct seq_file *, struct dentry *); 467fbdefd64SBryan Schumaker int nfs_show_stats(struct seq_file *, struct dentry *); 468fbdefd64SBryan Schumaker int nfs_remount(struct super_block *sb, int *flags, char *raw_data); 469fbdefd64SBryan Schumaker 470def6ed7eSAndy Adamson /* write.c */ 4711763da12SFred Isaman extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 472a20c93e3SChristoph Hellwig struct inode *inode, int ioflags, bool force_mds, 4731763da12SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 474dce81290STrond Myklebust extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 4750b7c0153SFred Isaman extern void nfs_commit_free(struct nfs_commit_data *p); 476def6ed7eSAndy Adamson extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 4770b7c0153SFred Isaman extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 4780b7c0153SFred Isaman extern int nfs_initiate_commit(struct rpc_clnt *clnt, 4790b7c0153SFred Isaman struct nfs_commit_data *data, 480c36aae9aSPeng Tao const struct nfs_rpc_ops *nfs_ops, 481e0c2b380SFred Isaman const struct rpc_call_ops *call_ops, 4829f0ec176SAndy Adamson int how, int flags); 4830b7c0153SFred Isaman extern void nfs_init_commit(struct nfs_commit_data *data, 484e0c2b380SFred Isaman struct list_head *head, 485f453a54aSFred Isaman struct pnfs_layout_segment *lseg, 486f453a54aSFred Isaman struct nfs_commit_info *cinfo); 4871763da12SFred Isaman int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 4881763da12SFred Isaman struct nfs_commit_info *cinfo, int max); 489ce59515cSAnna Schumaker unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); 4901763da12SFred Isaman int nfs_scan_commit(struct inode *inode, struct list_head *dst, 4911763da12SFred Isaman struct nfs_commit_info *cinfo); 4921763da12SFred Isaman void nfs_mark_request_commit(struct nfs_page *req, 4931763da12SFred Isaman struct pnfs_layout_segment *lseg, 494b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 495b57ff130SWeston Andros Adamson u32 ds_commit_idx); 496c65e6254SWeston Andros Adamson int nfs_write_need_commit(struct nfs_pgio_header *); 497a08a8cd3STrond Myklebust void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); 4981763da12SFred Isaman int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 4991763da12SFred Isaman int how, struct nfs_commit_info *cinfo); 500e0c2b380SFred Isaman void nfs_retry_commit(struct list_head *page_list, 501ea2cf228SFred Isaman struct pnfs_layout_segment *lseg, 502b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 503b57ff130SWeston Andros Adamson u32 ds_commit_idx); 5040b7c0153SFred Isaman void nfs_commitdata_release(struct nfs_commit_data *data); 5056272dcc6SAnna Schumaker void nfs_request_add_commit_list(struct nfs_page *req, 506ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 50786d80f97STrond Myklebust void nfs_request_add_commit_list_locked(struct nfs_page *req, 50886d80f97STrond Myklebust struct list_head *dst, 50986d80f97STrond Myklebust struct nfs_commit_info *cinfo); 510ea2cf228SFred Isaman void nfs_request_remove_commit_list(struct nfs_page *req, 511ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 512ea2cf228SFred Isaman void nfs_init_cinfo(struct nfs_commit_info *cinfo, 513ea2cf228SFred Isaman struct inode *inode, 514ea2cf228SFred Isaman struct nfs_direct_req *dreq); 515dc24826bSAndy Adamson int nfs_key_timeout_notify(struct file *filp, struct inode *inode); 516ce52914eSScott Mayhew bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode); 517a7d42ddbSWeston Andros Adamson void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); 518e0c2b380SFred Isaman 519837bb1d7STrond Myklebust int nfs_filemap_write_and_wait_range(struct address_space *mapping, 520837bb1d7STrond Myklebust loff_t lstart, loff_t lend); 521837bb1d7STrond Myklebust 522a5314a74STrond Myklebust #ifdef CONFIG_NFS_V4_1 523a5314a74STrond Myklebust static inline 524a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 525a5314a74STrond Myklebust { 526a5314a74STrond Myklebust int i; 527a5314a74STrond Myklebust 528a5314a74STrond Myklebust for (i = 0; i < cinfo->nbuckets; i++) 529a5314a74STrond Myklebust cinfo->buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; 530a5314a74STrond Myklebust } 531a5314a74STrond Myklebust #else 532a5314a74STrond Myklebust static inline 533a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 534a5314a74STrond Myklebust { 535a5314a74STrond Myklebust } 536a5314a74STrond Myklebust #endif 537a5314a74STrond Myklebust 538074cc1deSTrond Myklebust #ifdef CONFIG_MIGRATION 539074cc1deSTrond Myklebust extern int nfs_migrate_page(struct address_space *, 540a6bc32b8SMel Gorman struct page *, struct page *, enum migrate_mode); 541074cc1deSTrond Myklebust #endif 542def6ed7eSAndy Adamson 5438fc3c386STrond Myklebust static inline int 5448fc3c386STrond Myklebust nfs_write_verifier_cmp(const struct nfs_write_verifier *v1, 5458fc3c386STrond Myklebust const struct nfs_write_verifier *v2) 5468fc3c386STrond Myklebust { 5478fc3c386STrond Myklebust return memcmp(v1->data, v2->data, sizeof(v1->data)); 5488fc3c386STrond Myklebust } 5498fc3c386STrond Myklebust 5500e862a40SJeff Layton /* unlink.c */ 5510e862a40SJeff Layton extern struct rpc_task * 5520e862a40SJeff Layton nfs_async_rename(struct inode *old_dir, struct inode *new_dir, 5530e862a40SJeff Layton struct dentry *old_dentry, struct dentry *new_dentry, 5540e862a40SJeff Layton void (*complete)(struct rpc_task *, struct nfs_renamedata *)); 5550e862a40SJeff Layton extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); 5560e862a40SJeff Layton 5571763da12SFred Isaman /* direct.c */ 5581763da12SFred Isaman void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, 5591763da12SFred Isaman struct nfs_direct_req *dreq); 5606296556fSPeng Tao extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); 5611763da12SFred Isaman 562cccef3b9SAndy Adamson /* nfs4proc.c */ 5638cab4c39SChuck Lever extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 5645c6e5b60STrond Myklebust const struct nfs_client_initdata *); 56505f4c350SChuck Lever extern int nfs40_walk_client_list(struct nfs_client *clp, 56605f4c350SChuck Lever struct nfs_client **result, 567a52458b4SNeilBrown const struct cred *cred); 56805f4c350SChuck Lever extern int nfs41_walk_client_list(struct nfs_client *clp, 56905f4c350SChuck Lever struct nfs_client **result, 570a52458b4SNeilBrown const struct cred *cred); 57110e037d1SSantosh kumar pradhan extern void nfs4_test_session_trunk(struct rpc_clnt *clnt, 57210e037d1SSantosh kumar pradhan struct rpc_xprt *xprt, 57310e037d1SSantosh kumar pradhan void *data); 574cccef3b9SAndy Adamson 575ea7c38feSTrond Myklebust static inline struct inode *nfs_igrab_and_active(struct inode *inode) 576ea7c38feSTrond Myklebust { 577ea7c38feSTrond Myklebust inode = igrab(inode); 578ea7c38feSTrond Myklebust if (inode != NULL && !nfs_sb_active(inode->i_sb)) { 579ea7c38feSTrond Myklebust iput(inode); 580ea7c38feSTrond Myklebust inode = NULL; 581ea7c38feSTrond Myklebust } 582ea7c38feSTrond Myklebust return inode; 583ea7c38feSTrond Myklebust } 584ea7c38feSTrond Myklebust 585ea7c38feSTrond Myklebust static inline void nfs_iput_and_deactive(struct inode *inode) 586ea7c38feSTrond Myklebust { 587ea7c38feSTrond Myklebust if (inode != NULL) { 588ea7c38feSTrond Myklebust struct super_block *sb = inode->i_sb; 589ea7c38feSTrond Myklebust 590ea7c38feSTrond Myklebust iput(inode); 591ea7c38feSTrond Myklebust nfs_sb_deactive(sb); 592ea7c38feSTrond Myklebust } 593ea7c38feSTrond Myklebust } 594ea7c38feSTrond Myklebust 595557134a3SAndy Adamson /* 596f7b422b1SDavid Howells * Determine the device name as a string 597f7b422b1SDavid Howells */ 598b514f872SAl Viro static inline char *nfs_devname(struct dentry *dentry, 599f7b422b1SDavid Howells char *buffer, ssize_t buflen) 600f7b422b1SDavid Howells { 601b514f872SAl Viro char *dummy; 60297a54868SBen Hutchings return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); 603f7b422b1SDavid Howells } 604f7b422b1SDavid Howells 605f7b422b1SDavid Howells /* 606f7b422b1SDavid Howells * Determine the actual block size (and log2 thereof) 607f7b422b1SDavid Howells */ 608f7b422b1SDavid Howells static inline 609f7b422b1SDavid Howells unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 610f7b422b1SDavid Howells { 611f7b422b1SDavid Howells /* make sure blocksize is a power of two */ 612f7b422b1SDavid Howells if ((bsize & (bsize - 1)) || nrbitsp) { 613f7b422b1SDavid Howells unsigned char nrbits; 614f7b422b1SDavid Howells 615f7b422b1SDavid Howells for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 616f7b422b1SDavid Howells ; 617f7b422b1SDavid Howells bsize = 1 << nrbits; 618f7b422b1SDavid Howells if (nrbitsp) 619f7b422b1SDavid Howells *nrbitsp = nrbits; 620f7b422b1SDavid Howells } 621f7b422b1SDavid Howells 622f7b422b1SDavid Howells return bsize; 623f7b422b1SDavid Howells } 624f7b422b1SDavid Howells 625f7b422b1SDavid Howells /* 626f7b422b1SDavid Howells * Calculate the number of 512byte blocks used. 627f7b422b1SDavid Howells */ 6289eaa67c6SChuck Lever static inline blkcnt_t nfs_calc_block_size(u64 tsize) 629f7b422b1SDavid Howells { 6309eaa67c6SChuck Lever blkcnt_t used = (tsize + 511) >> 9; 631f7b422b1SDavid Howells return (used > ULONG_MAX) ? ULONG_MAX : used; 632f7b422b1SDavid Howells } 633f7b422b1SDavid Howells 634f7b422b1SDavid Howells /* 635f7b422b1SDavid Howells * Compute and set NFS server blocksize 636f7b422b1SDavid Howells */ 637f7b422b1SDavid Howells static inline 638f7b422b1SDavid Howells unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 639f7b422b1SDavid Howells { 640f7b422b1SDavid Howells if (bsize < NFS_MIN_FILE_IO_SIZE) 641f7b422b1SDavid Howells bsize = NFS_DEF_FILE_IO_SIZE; 642f7b422b1SDavid Howells else if (bsize >= NFS_MAX_FILE_IO_SIZE) 643f7b422b1SDavid Howells bsize = NFS_MAX_FILE_IO_SIZE; 644f7b422b1SDavid Howells 645f7b422b1SDavid Howells return nfs_block_bits(bsize, nrbitsp); 646f7b422b1SDavid Howells } 647f7b422b1SDavid Howells 648f7b422b1SDavid Howells /* 649f7b422b1SDavid Howells * Determine the maximum file size for a superblock 650f7b422b1SDavid Howells */ 651f7b422b1SDavid Howells static inline 652f7b422b1SDavid Howells void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 653f7b422b1SDavid Howells { 654f7b422b1SDavid Howells sb->s_maxbytes = (loff_t)maxfilesize; 655f7b422b1SDavid Howells if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 656f7b422b1SDavid Howells sb->s_maxbytes = MAX_LFS_FILESIZE; 657f7b422b1SDavid Howells } 65849a70f27STrond Myklebust 65949a70f27STrond Myklebust /* 660d15bc38dSTom Haynes * Record the page as unstable and mark its inode as dirty. 661d15bc38dSTom Haynes */ 662d15bc38dSTom Haynes static inline 66386d80f97STrond Myklebust void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) 664d15bc38dSTom Haynes { 66586d80f97STrond Myklebust if (!cinfo->dreq) { 666d15bc38dSTom Haynes struct inode *inode = page_file_mapping(page)->host; 667d15bc38dSTom Haynes 66811fb9989SMel Gorman inc_node_page_state(page, NR_UNSTABLE_NFS); 66993f78d88STejun Heo inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE); 670d15bc38dSTom Haynes __mark_inode_dirty(inode, I_DIRTY_DATASYNC); 671d15bc38dSTom Haynes } 67286d80f97STrond Myklebust } 673d15bc38dSTom Haynes 674d15bc38dSTom Haynes /* 67549a70f27STrond Myklebust * Determine the number of bytes of data the page contains 67649a70f27STrond Myklebust */ 67749a70f27STrond Myklebust static inline 67849a70f27STrond Myklebust unsigned int nfs_page_length(struct page *page) 67949a70f27STrond Myklebust { 680d56b4ddfSMel Gorman loff_t i_size = i_size_read(page_file_mapping(page)->host); 68149a70f27STrond Myklebust 68249a70f27STrond Myklebust if (i_size > 0) { 6838cd79788SHuang Ying pgoff_t index = page_index(page); 68409cbfeafSKirill A. Shutemov pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; 6858cd79788SHuang Ying if (index < end_index) 68609cbfeafSKirill A. Shutemov return PAGE_SIZE; 6878cd79788SHuang Ying if (index == end_index) 68809cbfeafSKirill A. Shutemov return ((i_size - 1) & ~PAGE_MASK) + 1; 68949a70f27STrond Myklebust } 69049a70f27STrond Myklebust return 0; 69149a70f27STrond Myklebust } 6928d5658c9STrond Myklebust 6938d5658c9STrond Myklebust /* 6940b26a0bfSTrond Myklebust * Convert a umode to a dirent->d_type 6950b26a0bfSTrond Myklebust */ 6960b26a0bfSTrond Myklebust static inline 6970b26a0bfSTrond Myklebust unsigned char nfs_umode_to_dtype(umode_t mode) 6980b26a0bfSTrond Myklebust { 6990b26a0bfSTrond Myklebust return (mode >> 12) & 15; 7000b26a0bfSTrond Myklebust } 7010b26a0bfSTrond Myklebust 7020b26a0bfSTrond Myklebust /* 7038d5658c9STrond Myklebust * Determine the number of pages in an array of length 'len' and 7048d5658c9STrond Myklebust * with a base offset of 'base' 7058d5658c9STrond Myklebust */ 7068d5658c9STrond Myklebust static inline 7078d5658c9STrond Myklebust unsigned int nfs_page_array_len(unsigned int base, size_t len) 7088d5658c9STrond Myklebust { 7098d5658c9STrond Myklebust return ((unsigned long)len + (unsigned long)base + 7108d5658c9STrond Myklebust PAGE_SIZE - 1) >> PAGE_SHIFT; 7118d5658c9STrond Myklebust } 7120110ee15STrond Myklebust 7133a1556e8STrond Myklebust /* 7143a1556e8STrond Myklebust * Convert a struct timespec into a 64-bit change attribute 7153a1556e8STrond Myklebust * 7163a1556e8STrond Myklebust * This does approximately the same thing as timespec_to_ns(), 7173a1556e8STrond Myklebust * but for calculation efficiency, we multiply the seconds by 7183a1556e8STrond Myklebust * 1024*1024*1024. 7193a1556e8STrond Myklebust */ 7203a1556e8STrond Myklebust static inline 721e86d5a02STrond Myklebust u64 nfs_timespec_to_change_attr(const struct timespec64 *ts) 7223a1556e8STrond Myklebust { 7233a1556e8STrond Myklebust return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 7243a1556e8STrond Myklebust } 7251264a2f0STrond Myklebust 7261264a2f0STrond Myklebust #ifdef CONFIG_CRC32 7271264a2f0STrond Myklebust /** 7281264a2f0STrond Myklebust * nfs_fhandle_hash - calculate the crc32 hash for the filehandle 7291264a2f0STrond Myklebust * @fh - pointer to filehandle 7301264a2f0STrond Myklebust * 7311264a2f0STrond Myklebust * returns a crc32 hash for the filehandle that is compatible with 7321264a2f0STrond Myklebust * the one displayed by "wireshark". 7331264a2f0STrond Myklebust */ 7341264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7351264a2f0STrond Myklebust { 7361264a2f0STrond Myklebust return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); 7371264a2f0STrond Myklebust } 73848c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) 73948c9579aSOlga Kornievskaia { 74048c9579aSOlga Kornievskaia return ~crc32_le(0xFFFFFFFF, &stateid->other[0], 74148c9579aSOlga Kornievskaia NFS4_STATEID_OTHER_SIZE); 74248c9579aSOlga Kornievskaia } 7431264a2f0STrond Myklebust #else 7441264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7451264a2f0STrond Myklebust { 7461264a2f0STrond Myklebust return 0; 7471264a2f0STrond Myklebust } 74848c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) 74948c9579aSOlga Kornievskaia { 75048c9579aSOlga Kornievskaia return 0; 75148c9579aSOlga Kornievskaia } 7521264a2f0STrond Myklebust #endif 7530bcbf039SPeng Tao 7540bcbf039SPeng Tao static inline bool nfs_error_is_fatal(int err) 7550bcbf039SPeng Tao { 7560bcbf039SPeng Tao switch (err) { 7570bcbf039SPeng Tao case -ERESTARTSYS: 7587dc58ca5STrond Myklebust case -EINTR: 75954551d85STrond Myklebust case -EACCES: 76054551d85STrond Myklebust case -EDQUOT: 76154551d85STrond Myklebust case -EFBIG: 7620bcbf039SPeng Tao case -EIO: 7630bcbf039SPeng Tao case -ENOSPC: 7640bcbf039SPeng Tao case -EROFS: 76554551d85STrond Myklebust case -ESTALE: 7660bcbf039SPeng Tao case -E2BIG: 7672dc23affSTrond Myklebust case -ENOMEM: 76811982a7cSTrond Myklebust case -ETIMEDOUT: 7690bcbf039SPeng Tao return true; 7700bcbf039SPeng Tao default: 7710bcbf039SPeng Tao return false; 7720bcbf039SPeng Tao } 7730bcbf039SPeng Tao } 774bf4b4905SNeilBrown 7758f54c7a4STrond Myklebust static inline bool nfs_error_is_fatal_on_server(int err) 7768f54c7a4STrond Myklebust { 7778f54c7a4STrond Myklebust switch (err) { 7788f54c7a4STrond Myklebust case 0: 7798f54c7a4STrond Myklebust case -ERESTARTSYS: 7808f54c7a4STrond Myklebust case -EINTR: 7818f54c7a4STrond Myklebust return false; 7828f54c7a4STrond Myklebust } 7838f54c7a4STrond Myklebust return nfs_error_is_fatal(err); 7848f54c7a4STrond Myklebust } 7859954bf92SDavid Howells 7869954bf92SDavid Howells /* 7879954bf92SDavid Howells * Select between a default port value and a user-specified port value. 7889954bf92SDavid Howells * If a zero value is set, then autobind will be used. 7899954bf92SDavid Howells */ 7909954bf92SDavid Howells static inline void nfs_set_port(struct sockaddr *sap, int *port, 7919954bf92SDavid Howells const unsigned short default_port) 7929954bf92SDavid Howells { 7939954bf92SDavid Howells if (*port == NFS_UNSPEC_PORT) 7949954bf92SDavid Howells *port = default_port; 7959954bf92SDavid Howells 7969954bf92SDavid Howells rpc_set_port(sap, *port); 7979954bf92SDavid Howells } 798