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\ */ 845eb005caSDavid Howells struct nfs_fs_context { 85e558100fSDavid Howells unsigned int flags; /* NFS{,4}_MOUNT_* flags */ 868cb7f74eSChuck Lever unsigned int rsize, wsize; 878cb7f74eSChuck Lever unsigned int timeo, retrans; 88e558100fSDavid Howells unsigned int acregmin, acregmax; 89e558100fSDavid Howells unsigned int 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; 99f8ee01e3SDavid Howells unsigned short protofamily; 100f8ee01e3SDavid Howells unsigned short mountfamily; 101b72e4f42SBryan Schumaker bool need_mount; 102f8ee01e3SDavid Howells bool sloppy; 1036b18eaa0S\"Talpey, Thomas\ 1046b18eaa0S\"Talpey, Thomas\ struct { 105e558100fSDavid Howells union { 106e558100fSDavid Howells struct sockaddr address; 107e558100fSDavid Howells struct sockaddr_storage _address; 108e558100fSDavid Howells }; 1094c568017SChuck Lever size_t addrlen; 1106b18eaa0S\"Talpey, Thomas\ char *hostname; 11178fa701fSChuck Lever u32 version; 1124cfd74fcSChuck Lever int port; 11378fa701fSChuck Lever unsigned short protocol; 1146b18eaa0S\"Talpey, Thomas\ } mount_server; 1156b18eaa0S\"Talpey, Thomas\ 1166b18eaa0S\"Talpey, Thomas\ struct { 117e558100fSDavid Howells union { 118e558100fSDavid Howells struct sockaddr address; 119e558100fSDavid Howells struct sockaddr_storage _address; 120e558100fSDavid Howells }; 1214c568017SChuck Lever size_t addrlen; 1226b18eaa0S\"Talpey, Thomas\ char *hostname; 1236b18eaa0S\"Talpey, Thomas\ char *export_path; 1244cfd74fcSChuck Lever int port; 12578fa701fSChuck Lever unsigned short protocol; 12628cc5cd8STrond Myklebust unsigned short nconnect; 1276b18eaa0S\"Talpey, Thomas\ } nfs_server; 128f9c3a380SEric Paris 129204cc0ccSAl Viro void *lsm_opts; 130e50a7a1aSStanislav Kinsbursky struct net *net; 13148be8a66SDavid Howells 13248be8a66SDavid Howells char buf[32]; /* Parse buffer */ 1336b18eaa0S\"Talpey, Thomas\ }; 1346b18eaa0S\"Talpey, Thomas\ 135146ec944SChuck Lever /* mount_clnt.c */ 136c5d120f8SChuck Lever struct nfs_mount_request { 137c5d120f8SChuck Lever struct sockaddr *sap; 138c5d120f8SChuck Lever size_t salen; 139c5d120f8SChuck Lever char *hostname; 140c5d120f8SChuck Lever char *dirpath; 141c5d120f8SChuck Lever u32 version; 142c5d120f8SChuck Lever unsigned short protocol; 143c5d120f8SChuck Lever struct nfs_fh *fh; 14450a737f8SChuck Lever int noresvport; 1458e02f6b9SChuck Lever unsigned int *auth_flav_len; 1468e02f6b9SChuck Lever rpc_authflavor_t *auth_flavs; 1476d59b8d5SStanislav Kinsbursky struct net *net; 148c5d120f8SChuck Lever }; 149c5d120f8SChuck Lever 150fbdefd64SBryan Schumaker struct nfs_mount_info { 151ab88dca3SAl Viro unsigned int inherited_bsize; 1525eb005caSDavid Howells struct nfs_fs_context *ctx; 153fbdefd64SBryan Schumaker struct nfs_clone_mount *cloned; 154d0b779d4SAl Viro struct nfs_server *server; 155fbdefd64SBryan Schumaker struct nfs_fh *mntfh; 1566a3f7a39SAl Viro struct nfs_subversion *nfs_mod; 157fbdefd64SBryan Schumaker }; 158fbdefd64SBryan Schumaker 159c5d120f8SChuck Lever extern int nfs_mount(struct nfs_mount_request *info); 1600b524123SChuck Lever extern void nfs_umount(const struct nfs_mount_request *info); 161146ec944SChuck Lever 16224c8dbbbSDavid Howells /* client.c */ 163a613fa16STrond Myklebust extern const struct rpc_program nfs_program; 1646b13168bSStanislav Kinsbursky extern void nfs_clients_init(struct net *net); 16510b7a70cSTrond Myklebust extern void nfs_clients_exit(struct net *net); 1666663ee7fSBryan Schumaker extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); 1675c6e5b60STrond Myklebust int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t); 1687d38de3fSAnna Schumaker struct nfs_client *nfs_get_client(const struct nfs_client_initdata *); 169fcf10398SBryan Schumaker int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); 170fcf10398SBryan Schumaker void nfs_server_insert_lists(struct nfs_server *); 17132e62b7cSChuck Lever void nfs_server_remove_lists(struct nfs_server *); 172a956bedaSTrond Myklebust void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans); 173fcf10398SBryan Schumaker int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, 174fcf10398SBryan Schumaker rpc_authflavor_t); 175fcf10398SBryan Schumaker struct nfs_server *nfs_alloc_server(void); 176fcf10398SBryan Schumaker void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); 17754ceac45SDavid Howells 17824c8dbbbSDavid Howells extern void nfs_put_client(struct nfs_client *); 179cdb7ecedSBryan Schumaker extern void nfs_free_client(struct nfs_client *); 18028cd1b3fSStanislav Kinsbursky extern struct nfs_client *nfs4_find_client_ident(struct net *, int); 181c36fca52SAndy Adamson extern struct nfs_client * 182c7add9a9SStanislav Kinsbursky nfs4_find_client_sessionid(struct net *, const struct sockaddr *, 183459de2edSBryan Schumaker struct nfs4_sessionid *, u32); 1840c38f213SAl Viro extern struct nfs_server *nfs_create_server(struct nfs_mount_info *); 1850c38f213SAl Viro extern struct nfs_server *nfs4_create_server(struct nfs_mount_info *); 18654ceac45SDavid Howells extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, 18754ceac45SDavid Howells struct nfs_fh *); 18832e62b7cSChuck Lever extern int nfs4_update_server(struct nfs_server *server, const char *hostname, 189292f503cSTrond Myklebust struct sockaddr *sap, size_t salen, 190292f503cSTrond Myklebust struct net *net); 19154ceac45SDavid Howells extern void nfs_free_server(struct nfs_server *server); 19254ceac45SDavid Howells extern struct nfs_server *nfs_clone_server(struct nfs_server *, 19354ceac45SDavid Howells struct nfs_fh *, 1947e6eb683SBryan Schumaker struct nfs_fattr *, 1957e6eb683SBryan Schumaker rpc_authflavor_t); 196a33e4b03SWeston Andros Adamson extern bool nfs_client_init_is_complete(const struct nfs_client *clp); 197a33e4b03SWeston Andros Adamson extern int nfs_client_init_status(const struct nfs_client *clp); 1984697bd5eSTrond Myklebust extern int nfs_wait_client_init_complete(const struct nfs_client *clp); 19976db6d95SAndy Adamson extern void nfs_mark_client_ready(struct nfs_client *clp, int state); 2003fc75f12STigran Mkrtchyan extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, 201d83217c1SAndy Adamson const struct sockaddr *ds_addr, 20298fc685aSAndy Adamson int ds_addrlen, int ds_proto, 20398fc685aSAndy Adamson unsigned int ds_timeo, 204064172f3SPeng Tao unsigned int ds_retrans, 2057d38de3fSAnna Schumaker u32 minor_version); 2060e20162eSAndy Adamson extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, 2070e20162eSAndy Adamson struct inode *); 208b224f7cbSTigran Mkrtchyan extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, 2091a04c6e1SPeng Tao const struct sockaddr *ds_addr, int ds_addrlen, 2101a04c6e1SPeng Tao int ds_proto, unsigned int ds_timeo, 2117d38de3fSAnna Schumaker unsigned int ds_retrans); 2126aaca566SDavid Howells #ifdef CONFIG_PROC_FS 2136aaca566SDavid Howells extern int __init nfs_fs_proc_init(void); 2146aaca566SDavid Howells extern void nfs_fs_proc_exit(void); 21565b38851SEric W. Biederman extern int nfs_fs_proc_net_init(struct net *net); 21665b38851SEric W. Biederman extern void nfs_fs_proc_net_exit(struct net *net); 2176aaca566SDavid Howells #else 21865b38851SEric W. Biederman static inline int nfs_fs_proc_net_init(struct net *net) 21965b38851SEric W. Biederman { 22065b38851SEric W. Biederman return 0; 22165b38851SEric W. Biederman } 22265b38851SEric W. Biederman static inline void nfs_fs_proc_net_exit(struct net *net) 22365b38851SEric W. Biederman { 22465b38851SEric W. Biederman } 2256aaca566SDavid Howells static inline int nfs_fs_proc_init(void) 2266aaca566SDavid Howells { 2276aaca566SDavid Howells return 0; 2286aaca566SDavid Howells } 2296aaca566SDavid Howells static inline void nfs_fs_proc_exit(void) 2306aaca566SDavid Howells { 2316aaca566SDavid Howells } 2326aaca566SDavid Howells #endif 23324c8dbbbSDavid Howells 234f7b422b1SDavid Howells /* callback_xdr.c */ 235e9679189SChristoph Hellwig extern const struct svc_version nfs4_callback_version1; 236e9679189SChristoph Hellwig extern const struct svc_version nfs4_callback_version4; 237f7b422b1SDavid Howells 2384db6e0b7SFred Isaman struct nfs_pageio_descriptor; 2399954bf92SDavid Howells 2409954bf92SDavid Howells /* mount.c */ 2419954bf92SDavid Howells #define NFS_TEXT_DATA 1 2429954bf92SDavid Howells 2435eb005caSDavid Howells extern struct nfs_fs_context *nfs_alloc_parsed_mount_data(void); 2445eb005caSDavid Howells extern void nfs_free_parsed_mount_data(struct nfs_fs_context *ctx); 2455eb005caSDavid Howells extern int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx); 2469954bf92SDavid Howells extern int nfs_validate_mount_data(struct file_system_type *fs_type, 2479954bf92SDavid Howells void *options, 2485eb005caSDavid Howells struct nfs_fs_context *ctx, 2499954bf92SDavid Howells struct nfs_fh *mntfh, 2509954bf92SDavid Howells const char *dev_name); 2519954bf92SDavid Howells extern int nfs_validate_text_mount_data(void *options, 2525eb005caSDavid Howells struct nfs_fs_context *ctx, 2539954bf92SDavid Howells const char *dev_name); 2549954bf92SDavid Howells 255f7b422b1SDavid Howells /* pagelist.c */ 256f7b422b1SDavid Howells extern int __init nfs_init_nfspagecache(void); 257266bee88SDavid Brownell extern void nfs_destroy_nfspagecache(void); 258f7b422b1SDavid Howells extern int __init nfs_init_readpagecache(void); 259266bee88SDavid Brownell extern void nfs_destroy_readpagecache(void); 260f7b422b1SDavid Howells extern int __init nfs_init_writepagecache(void); 261266bee88SDavid Brownell extern void nfs_destroy_writepagecache(void); 262f7b422b1SDavid Howells 263f7b422b1SDavid Howells extern int __init nfs_init_directcache(void); 264266bee88SDavid Brownell extern void nfs_destroy_directcache(void); 2654db6e0b7SFred Isaman extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 2664db6e0b7SFred Isaman struct nfs_pgio_header *hdr, 2674db6e0b7SFred Isaman void (*release)(struct nfs_pgio_header *hdr)); 2684db6e0b7SFred Isaman void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 269210c7c17SBenjamin Coddington int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); 270577b4232STrond Myklebust 27141d8d5b7SAnna Schumaker extern const struct nfs_pageio_ops nfs_pgio_rw_ops; 2721e7f3a48SWeston Andros Adamson struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); 2731e7f3a48SWeston Andros Adamson void nfs_pgio_header_free(struct nfs_pgio_header *); 274ef2c488cSAnna Schumaker int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); 27546a5ab47SPeng Tao int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, 276a52458b4SNeilBrown const struct cred *cred, const struct nfs_rpc_ops *rpc_ops, 27746a5ab47SPeng Tao const struct rpc_call_ops *call_ops, int how, int flags); 278d4581383SWeston Andros Adamson void nfs_free_request(struct nfs_page *req); 27948d635f1SPeng Tao struct nfs_pgio_mirror * 28048d635f1SPeng Tao nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); 28100bfa30aSAnna Schumaker 28247af81f2SPeng Tao static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc) 28347af81f2SPeng Tao { 28447af81f2SPeng Tao WARN_ON_ONCE(desc->pg_mirror_count < 1); 28547af81f2SPeng Tao return desc->pg_mirror_count > 1; 28647af81f2SPeng Tao } 28747af81f2SPeng Tao 288138a2935STrond Myklebust static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, 289138a2935STrond Myklebust const struct nfs_open_context *ctx2) 290138a2935STrond Myklebust { 291a52458b4SNeilBrown return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state; 292138a2935STrond Myklebust } 293138a2935STrond Myklebust 294f7b422b1SDavid Howells /* nfs2xdr.c */ 295499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs_procedures[]; 296573c4e1eSChuck Lever extern int nfs2_decode_dirent(struct xdr_stream *, 297a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 298f7b422b1SDavid Howells 299f7b422b1SDavid Howells /* nfs3xdr.c */ 300499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs3_procedures[]; 301573c4e1eSChuck Lever extern int nfs3_decode_dirent(struct xdr_stream *, 302a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 303f7b422b1SDavid Howells 304f7b422b1SDavid Howells /* nfs4xdr.c */ 30589d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 306573c4e1eSChuck Lever extern int nfs4_decode_dirent(struct xdr_stream *, 307a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 3087d4e2747SDavid Howells #endif 3092449ea2eSAlexandros Batsakis #ifdef CONFIG_NFS_V4_1 3102449ea2eSAlexandros Batsakis extern const u32 nfs41_maxread_overhead; 3112449ea2eSAlexandros Batsakis extern const u32 nfs41_maxwrite_overhead; 312f1c097beSAndy Adamson extern const u32 nfs41_maxgetdevinfo_overhead; 3132449ea2eSAlexandros Batsakis #endif 314f7b422b1SDavid Howells 315f7b422b1SDavid Howells /* nfs4proc.c */ 31689d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 317499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs4_procedures[]; 318d75d5414SAndrew Morton #endif 319f7b422b1SDavid Howells 320694e096fSAnna Schumaker #ifdef CONFIG_NFS_V4_SECURITY_LABEL 321694e096fSAnna Schumaker extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); 322a49c2691SKinglong Mee static inline struct nfs4_label * 323a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 324a49c2691SKinglong Mee { 325a49c2691SKinglong Mee if (!dst || !src) 326a49c2691SKinglong Mee return NULL; 327a49c2691SKinglong Mee 328a49c2691SKinglong Mee if (src->len > NFS4_MAXLABELLEN) 329a49c2691SKinglong Mee return NULL; 330a49c2691SKinglong Mee 331a49c2691SKinglong Mee dst->lfs = src->lfs; 332a49c2691SKinglong Mee dst->pi = src->pi; 333a49c2691SKinglong Mee dst->len = src->len; 334a49c2691SKinglong Mee memcpy(dst->label, src->label, src->len); 335a49c2691SKinglong Mee 336a49c2691SKinglong Mee return dst; 337a49c2691SKinglong Mee } 338694e096fSAnna Schumaker static inline void nfs4_label_free(struct nfs4_label *label) 339694e096fSAnna Schumaker { 340694e096fSAnna Schumaker if (label) { 341694e096fSAnna Schumaker kfree(label->label); 342694e096fSAnna Schumaker kfree(label); 343694e096fSAnna Schumaker } 344694e096fSAnna Schumaker return; 345694e096fSAnna Schumaker } 346fd1defc2STrond Myklebust 347fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 348fd1defc2STrond Myklebust { 349fd1defc2STrond Myklebust if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) 350fd1defc2STrond Myklebust nfsi->cache_validity |= NFS_INO_INVALID_LABEL; 351fd1defc2STrond Myklebust } 352694e096fSAnna Schumaker #else 353694e096fSAnna Schumaker static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } 354694e096fSAnna Schumaker static inline void nfs4_label_free(void *label) {} 355fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 356fd1defc2STrond Myklebust { 357fd1defc2STrond Myklebust } 358a49c2691SKinglong Mee static inline struct nfs4_label * 359a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 360a49c2691SKinglong Mee { 361a49c2691SKinglong Mee return NULL; 362a49c2691SKinglong Mee } 363694e096fSAnna Schumaker #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 364694e096fSAnna Schumaker 3657fe5c398STrond Myklebust /* proc.c */ 3667fe5c398STrond Myklebust void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 3678cab4c39SChuck Lever extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 3685c6e5b60STrond Myklebust const struct nfs_client_initdata *); 3697fe5c398STrond Myklebust 370979df72eSTrond Myklebust /* dir.c */ 3711bcf4c5cSTrond Myklebust extern void nfs_advise_use_readdirplus(struct inode *dir); 372311324adSTrond Myklebust extern void nfs_force_use_readdirplus(struct inode *dir); 3731ab6c499SDave Chinner extern unsigned long nfs_access_cache_count(struct shrinker *shrink, 3741ab6c499SDave Chinner struct shrink_control *sc); 3751ab6c499SDave Chinner extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, 3761495f230SYing Han struct shrink_control *sc); 377597d9289SBryan Schumaker struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 378597d9289SBryan Schumaker int nfs_create(struct inode *, struct dentry *, umode_t, bool); 379597d9289SBryan Schumaker int nfs_mkdir(struct inode *, struct dentry *, umode_t); 380597d9289SBryan Schumaker int nfs_rmdir(struct inode *, struct dentry *); 381597d9289SBryan Schumaker int nfs_unlink(struct inode *, struct dentry *); 382597d9289SBryan Schumaker int nfs_symlink(struct inode *, struct dentry *, const char *); 383597d9289SBryan Schumaker int nfs_link(struct dentry *, struct inode *, struct dentry *); 384597d9289SBryan Schumaker int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); 3851cd66c93SMiklos Szeredi int nfs_rename(struct inode *, struct dentry *, 3861cd66c93SMiklos Szeredi struct inode *, struct dentry *, unsigned int); 387979df72eSTrond Myklebust 388ce4ef7c0SBryan Schumaker /* file.c */ 3894ff79bc7SChristoph Hellwig int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 390ce4ef7c0SBryan Schumaker loff_t nfs_file_llseek(struct file *, loff_t, int); 3913aa2d199SAl Viro ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); 392ce4ef7c0SBryan Schumaker int nfs_file_mmap(struct file *, struct vm_area_struct *); 393edaf4369SAl Viro ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); 394ce4ef7c0SBryan Schumaker int nfs_file_release(struct inode *, struct file *); 395ce4ef7c0SBryan Schumaker int nfs_lock(struct file *, int, struct file_lock *); 396ce4ef7c0SBryan Schumaker int nfs_flock(struct file *, int, struct file_lock *); 397ce4ef7c0SBryan Schumaker int nfs_check_flags(int); 398ce4ef7c0SBryan Schumaker 399f7b422b1SDavid Howells /* inode.c */ 4005746006fSTrond Myklebust extern struct workqueue_struct *nfsiod_workqueue; 401f7b422b1SDavid Howells extern struct inode *nfs_alloc_inode(struct super_block *sb); 402ca1a199eSAl Viro extern void nfs_free_inode(struct inode *); 403a9185b41SChristoph Hellwig extern int nfs_write_inode(struct inode *, struct writeback_control *); 404eed99357STrond Myklebust extern int nfs_drop_inode(struct inode *); 40519d87ca3SBryan Schumaker extern void nfs_clear_inode(struct inode *); 406b57922d9SAl Viro extern void nfs_evict_inode(struct inode *); 407f41f7418STrond Myklebust void nfs_zap_acl_cache(struct inode *inode); 40861540bf6STrond Myklebust extern bool nfs_check_cache_invalid(struct inode *, unsigned long); 409dfd01f02SPeter Zijlstra extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); 4105e4def20SDavid Howells extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode); 411f7b422b1SDavid Howells 412f7b422b1SDavid Howells /* super.c */ 4136a74490dSBryan Schumaker extern const struct super_operations nfs_sops; 414ab7017a3SBryan Schumaker extern struct file_system_type nfs_fs_type; 41582eaed2bSAl Viro extern struct file_system_type nfs_prepared_fs_type; 41689d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 41754ceac45SDavid Howells extern struct file_system_type nfs4_referral_fs_type; 418f7b422b1SDavid Howells #endif 4194d4b69ddSWeston Andros Adamson bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); 420a55d3297SAl Viro struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *); 421fbdefd64SBryan Schumaker struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); 422fbdefd64SBryan Schumaker void nfs_kill_super(struct super_block *); 4234ebd9ab3SDominik Hackl 424f7b422b1SDavid Howells extern struct rpc_stat nfs_rpcstat; 4254ebd9ab3SDominik Hackl 426f7b422b1SDavid Howells extern int __init register_nfs_fs(void); 427f7b422b1SDavid Howells extern void __exit unregister_nfs_fs(void); 428ea7c38feSTrond Myklebust extern bool nfs_sb_active(struct super_block *sb); 4291daef0a8STrond Myklebust extern void nfs_sb_deactive(struct super_block *sb); 430f7b422b1SDavid Howells 431a5864c99STrond Myklebust /* io.c */ 432a5864c99STrond Myklebust extern void nfs_start_io_read(struct inode *inode); 433a5864c99STrond Myklebust extern void nfs_end_io_read(struct inode *inode); 434a5864c99STrond Myklebust extern void nfs_start_io_write(struct inode *inode); 435a5864c99STrond Myklebust extern void nfs_end_io_write(struct inode *inode); 436a5864c99STrond Myklebust extern void nfs_start_io_direct(struct inode *inode); 437a5864c99STrond Myklebust extern void nfs_end_io_direct(struct inode *inode); 438a5864c99STrond Myklebust 439651b0e70STrond Myklebust static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) 440651b0e70STrond Myklebust { 441651b0e70STrond Myklebust return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0; 442651b0e70STrond Myklebust } 443651b0e70STrond Myklebust 444f7b422b1SDavid Howells /* namespace.c */ 44597a54868SBen Hutchings #define NFS_PATH_CANONICAL 1 446b514f872SAl Viro extern char *nfs_path(char **p, struct dentry *dentry, 44797a54868SBen Hutchings char *buffer, ssize_t buflen, unsigned flags); 44836d43a43SDavid Howells extern struct vfsmount *nfs_d_automount(struct path *path); 449281cad46SBryan Schumaker struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, 450281cad46SBryan Schumaker struct nfs_fh *, struct nfs_fattr *); 451281cad46SBryan Schumaker struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, 452281cad46SBryan Schumaker struct nfs_fattr *, rpc_authflavor_t); 453f7b422b1SDavid Howells 45454ceac45SDavid Howells /* getroot.c */ 4550d5839adSAl Viro extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, 4560d5839adSAl Viro const char *); 45789d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 4580d5839adSAl Viro extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, 4590d5839adSAl Viro const char *); 46054ceac45SDavid Howells 4615e6b1990STrond Myklebust extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); 4627d4e2747SDavid Howells #endif 463f7b422b1SDavid Howells 464061ae2edSFred Isaman struct nfs_pgio_completion_ops; 465f11c88afSAndy Adamson /* read.c */ 466584aa810SFred Isaman extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 467fab5fc25SChristoph Hellwig struct inode *inode, bool force_mds, 468584aa810SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 469f11c88afSAndy Adamson extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 470493292ddSTrond Myklebust extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 471e885de1aSTrond Myklebust 472fbdefd64SBryan Schumaker /* super.c */ 473fbdefd64SBryan Schumaker void nfs_umount_begin(struct super_block *); 474fbdefd64SBryan Schumaker int nfs_statfs(struct dentry *, struct kstatfs *); 475fbdefd64SBryan Schumaker int nfs_show_options(struct seq_file *, struct dentry *); 476fbdefd64SBryan Schumaker int nfs_show_devname(struct seq_file *, struct dentry *); 477fbdefd64SBryan Schumaker int nfs_show_path(struct seq_file *, struct dentry *); 478fbdefd64SBryan Schumaker int nfs_show_stats(struct seq_file *, struct dentry *); 479fbdefd64SBryan Schumaker int nfs_remount(struct super_block *sb, int *flags, char *raw_data); 480fbdefd64SBryan Schumaker 481def6ed7eSAndy Adamson /* write.c */ 4821763da12SFred Isaman extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 483a20c93e3SChristoph Hellwig struct inode *inode, int ioflags, bool force_mds, 4841763da12SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 485dce81290STrond Myklebust extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 4860b7c0153SFred Isaman extern void nfs_commit_free(struct nfs_commit_data *p); 487def6ed7eSAndy Adamson extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 4880b7c0153SFred Isaman extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 4890b7c0153SFred Isaman extern int nfs_initiate_commit(struct rpc_clnt *clnt, 4900b7c0153SFred Isaman struct nfs_commit_data *data, 491c36aae9aSPeng Tao const struct nfs_rpc_ops *nfs_ops, 492e0c2b380SFred Isaman const struct rpc_call_ops *call_ops, 4939f0ec176SAndy Adamson int how, int flags); 4940b7c0153SFred Isaman extern void nfs_init_commit(struct nfs_commit_data *data, 495e0c2b380SFred Isaman struct list_head *head, 496f453a54aSFred Isaman struct pnfs_layout_segment *lseg, 497f453a54aSFred Isaman struct nfs_commit_info *cinfo); 4981763da12SFred Isaman int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 4991763da12SFred Isaman struct nfs_commit_info *cinfo, int max); 500ce59515cSAnna Schumaker unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); 5011763da12SFred Isaman int nfs_scan_commit(struct inode *inode, struct list_head *dst, 5021763da12SFred Isaman struct nfs_commit_info *cinfo); 5031763da12SFred Isaman void nfs_mark_request_commit(struct nfs_page *req, 5041763da12SFred Isaman struct pnfs_layout_segment *lseg, 505b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 506b57ff130SWeston Andros Adamson u32 ds_commit_idx); 507c65e6254SWeston Andros Adamson int nfs_write_need_commit(struct nfs_pgio_header *); 508a08a8cd3STrond Myklebust void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); 5091763da12SFred Isaman int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 5101763da12SFred Isaman int how, struct nfs_commit_info *cinfo); 511e0c2b380SFred Isaman void nfs_retry_commit(struct list_head *page_list, 512ea2cf228SFred Isaman struct pnfs_layout_segment *lseg, 513b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 514b57ff130SWeston Andros Adamson u32 ds_commit_idx); 5150b7c0153SFred Isaman void nfs_commitdata_release(struct nfs_commit_data *data); 5166272dcc6SAnna Schumaker void nfs_request_add_commit_list(struct nfs_page *req, 517ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 51886d80f97STrond Myklebust void nfs_request_add_commit_list_locked(struct nfs_page *req, 51986d80f97STrond Myklebust struct list_head *dst, 52086d80f97STrond Myklebust struct nfs_commit_info *cinfo); 521ea2cf228SFred Isaman void nfs_request_remove_commit_list(struct nfs_page *req, 522ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 523ea2cf228SFred Isaman void nfs_init_cinfo(struct nfs_commit_info *cinfo, 524ea2cf228SFred Isaman struct inode *inode, 525ea2cf228SFred Isaman struct nfs_direct_req *dreq); 526dc24826bSAndy Adamson int nfs_key_timeout_notify(struct file *filp, struct inode *inode); 527ce52914eSScott Mayhew bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode); 528a7d42ddbSWeston Andros Adamson void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); 529e0c2b380SFred Isaman 530837bb1d7STrond Myklebust int nfs_filemap_write_and_wait_range(struct address_space *mapping, 531837bb1d7STrond Myklebust loff_t lstart, loff_t lend); 532837bb1d7STrond Myklebust 533a5314a74STrond Myklebust #ifdef CONFIG_NFS_V4_1 534a5314a74STrond Myklebust static inline 535a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 536a5314a74STrond Myklebust { 537a5314a74STrond Myklebust int i; 538a5314a74STrond Myklebust 539a5314a74STrond Myklebust for (i = 0; i < cinfo->nbuckets; i++) 540a5314a74STrond Myklebust cinfo->buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; 541a5314a74STrond Myklebust } 542a5314a74STrond Myklebust #else 543a5314a74STrond Myklebust static inline 544a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 545a5314a74STrond Myklebust { 546a5314a74STrond Myklebust } 547a5314a74STrond Myklebust #endif 548a5314a74STrond Myklebust 549074cc1deSTrond Myklebust #ifdef CONFIG_MIGRATION 550074cc1deSTrond Myklebust extern int nfs_migrate_page(struct address_space *, 551a6bc32b8SMel Gorman struct page *, struct page *, enum migrate_mode); 552074cc1deSTrond Myklebust #endif 553def6ed7eSAndy Adamson 5548fc3c386STrond Myklebust static inline int 5558fc3c386STrond Myklebust nfs_write_verifier_cmp(const struct nfs_write_verifier *v1, 5568fc3c386STrond Myklebust const struct nfs_write_verifier *v2) 5578fc3c386STrond Myklebust { 5588fc3c386STrond Myklebust return memcmp(v1->data, v2->data, sizeof(v1->data)); 5598fc3c386STrond Myklebust } 5608fc3c386STrond Myklebust 5610e862a40SJeff Layton /* unlink.c */ 5620e862a40SJeff Layton extern struct rpc_task * 5630e862a40SJeff Layton nfs_async_rename(struct inode *old_dir, struct inode *new_dir, 5640e862a40SJeff Layton struct dentry *old_dentry, struct dentry *new_dentry, 5650e862a40SJeff Layton void (*complete)(struct rpc_task *, struct nfs_renamedata *)); 5660e862a40SJeff Layton extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); 5670e862a40SJeff Layton 5681763da12SFred Isaman /* direct.c */ 5691763da12SFred Isaman void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, 5701763da12SFred Isaman struct nfs_direct_req *dreq); 5716296556fSPeng Tao extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); 5721763da12SFred Isaman 573cccef3b9SAndy Adamson /* nfs4proc.c */ 5748cab4c39SChuck Lever extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 5755c6e5b60STrond Myklebust const struct nfs_client_initdata *); 57605f4c350SChuck Lever extern int nfs40_walk_client_list(struct nfs_client *clp, 57705f4c350SChuck Lever struct nfs_client **result, 578a52458b4SNeilBrown const struct cred *cred); 57905f4c350SChuck Lever extern int nfs41_walk_client_list(struct nfs_client *clp, 58005f4c350SChuck Lever struct nfs_client **result, 581a52458b4SNeilBrown const struct cred *cred); 58210e037d1SSantosh kumar pradhan extern void nfs4_test_session_trunk(struct rpc_clnt *clnt, 58310e037d1SSantosh kumar pradhan struct rpc_xprt *xprt, 58410e037d1SSantosh kumar pradhan void *data); 585cccef3b9SAndy Adamson 586ea7c38feSTrond Myklebust static inline struct inode *nfs_igrab_and_active(struct inode *inode) 587ea7c38feSTrond Myklebust { 588ea7c38feSTrond Myklebust inode = igrab(inode); 589ea7c38feSTrond Myklebust if (inode != NULL && !nfs_sb_active(inode->i_sb)) { 590ea7c38feSTrond Myklebust iput(inode); 591ea7c38feSTrond Myklebust inode = NULL; 592ea7c38feSTrond Myklebust } 593ea7c38feSTrond Myklebust return inode; 594ea7c38feSTrond Myklebust } 595ea7c38feSTrond Myklebust 596ea7c38feSTrond Myklebust static inline void nfs_iput_and_deactive(struct inode *inode) 597ea7c38feSTrond Myklebust { 598ea7c38feSTrond Myklebust if (inode != NULL) { 599ea7c38feSTrond Myklebust struct super_block *sb = inode->i_sb; 600ea7c38feSTrond Myklebust 601ea7c38feSTrond Myklebust iput(inode); 602ea7c38feSTrond Myklebust nfs_sb_deactive(sb); 603ea7c38feSTrond Myklebust } 604ea7c38feSTrond Myklebust } 605ea7c38feSTrond Myklebust 606557134a3SAndy Adamson /* 607f7b422b1SDavid Howells * Determine the device name as a string 608f7b422b1SDavid Howells */ 609b514f872SAl Viro static inline char *nfs_devname(struct dentry *dentry, 610f7b422b1SDavid Howells char *buffer, ssize_t buflen) 611f7b422b1SDavid Howells { 612b514f872SAl Viro char *dummy; 61397a54868SBen Hutchings return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); 614f7b422b1SDavid Howells } 615f7b422b1SDavid Howells 616f7b422b1SDavid Howells /* 617f7b422b1SDavid Howells * Determine the actual block size (and log2 thereof) 618f7b422b1SDavid Howells */ 619f7b422b1SDavid Howells static inline 620f7b422b1SDavid Howells unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 621f7b422b1SDavid Howells { 622f7b422b1SDavid Howells /* make sure blocksize is a power of two */ 623f7b422b1SDavid Howells if ((bsize & (bsize - 1)) || nrbitsp) { 624f7b422b1SDavid Howells unsigned char nrbits; 625f7b422b1SDavid Howells 626f7b422b1SDavid Howells for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 627f7b422b1SDavid Howells ; 628f7b422b1SDavid Howells bsize = 1 << nrbits; 629f7b422b1SDavid Howells if (nrbitsp) 630f7b422b1SDavid Howells *nrbitsp = nrbits; 631f7b422b1SDavid Howells } 632f7b422b1SDavid Howells 633f7b422b1SDavid Howells return bsize; 634f7b422b1SDavid Howells } 635f7b422b1SDavid Howells 636f7b422b1SDavid Howells /* 637f7b422b1SDavid Howells * Calculate the number of 512byte blocks used. 638f7b422b1SDavid Howells */ 6399eaa67c6SChuck Lever static inline blkcnt_t nfs_calc_block_size(u64 tsize) 640f7b422b1SDavid Howells { 6419eaa67c6SChuck Lever blkcnt_t used = (tsize + 511) >> 9; 642f7b422b1SDavid Howells return (used > ULONG_MAX) ? ULONG_MAX : used; 643f7b422b1SDavid Howells } 644f7b422b1SDavid Howells 645f7b422b1SDavid Howells /* 646f7b422b1SDavid Howells * Compute and set NFS server blocksize 647f7b422b1SDavid Howells */ 648f7b422b1SDavid Howells static inline 649f7b422b1SDavid Howells unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 650f7b422b1SDavid Howells { 651f7b422b1SDavid Howells if (bsize < NFS_MIN_FILE_IO_SIZE) 652f7b422b1SDavid Howells bsize = NFS_DEF_FILE_IO_SIZE; 653f7b422b1SDavid Howells else if (bsize >= NFS_MAX_FILE_IO_SIZE) 654f7b422b1SDavid Howells bsize = NFS_MAX_FILE_IO_SIZE; 655f7b422b1SDavid Howells 656f7b422b1SDavid Howells return nfs_block_bits(bsize, nrbitsp); 657f7b422b1SDavid Howells } 658f7b422b1SDavid Howells 659f7b422b1SDavid Howells /* 660f7b422b1SDavid Howells * Determine the maximum file size for a superblock 661f7b422b1SDavid Howells */ 662f7b422b1SDavid Howells static inline 663f7b422b1SDavid Howells void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 664f7b422b1SDavid Howells { 665f7b422b1SDavid Howells sb->s_maxbytes = (loff_t)maxfilesize; 666f7b422b1SDavid Howells if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 667f7b422b1SDavid Howells sb->s_maxbytes = MAX_LFS_FILESIZE; 668f7b422b1SDavid Howells } 66949a70f27STrond Myklebust 67049a70f27STrond Myklebust /* 671d15bc38dSTom Haynes * Record the page as unstable and mark its inode as dirty. 672d15bc38dSTom Haynes */ 673d15bc38dSTom Haynes static inline 67486d80f97STrond Myklebust void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) 675d15bc38dSTom Haynes { 67686d80f97STrond Myklebust if (!cinfo->dreq) { 677d15bc38dSTom Haynes struct inode *inode = page_file_mapping(page)->host; 678d15bc38dSTom Haynes 67911fb9989SMel Gorman inc_node_page_state(page, NR_UNSTABLE_NFS); 68093f78d88STejun Heo inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE); 681d15bc38dSTom Haynes __mark_inode_dirty(inode, I_DIRTY_DATASYNC); 682d15bc38dSTom Haynes } 68386d80f97STrond Myklebust } 684d15bc38dSTom Haynes 685d15bc38dSTom Haynes /* 68649a70f27STrond Myklebust * Determine the number of bytes of data the page contains 68749a70f27STrond Myklebust */ 68849a70f27STrond Myklebust static inline 68949a70f27STrond Myklebust unsigned int nfs_page_length(struct page *page) 69049a70f27STrond Myklebust { 691d56b4ddfSMel Gorman loff_t i_size = i_size_read(page_file_mapping(page)->host); 69249a70f27STrond Myklebust 69349a70f27STrond Myklebust if (i_size > 0) { 6948cd79788SHuang Ying pgoff_t index = page_index(page); 69509cbfeafSKirill A. Shutemov pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; 6968cd79788SHuang Ying if (index < end_index) 69709cbfeafSKirill A. Shutemov return PAGE_SIZE; 6988cd79788SHuang Ying if (index == end_index) 69909cbfeafSKirill A. Shutemov return ((i_size - 1) & ~PAGE_MASK) + 1; 70049a70f27STrond Myklebust } 70149a70f27STrond Myklebust return 0; 70249a70f27STrond Myklebust } 7038d5658c9STrond Myklebust 7048d5658c9STrond Myklebust /* 7050b26a0bfSTrond Myklebust * Convert a umode to a dirent->d_type 7060b26a0bfSTrond Myklebust */ 7070b26a0bfSTrond Myklebust static inline 7080b26a0bfSTrond Myklebust unsigned char nfs_umode_to_dtype(umode_t mode) 7090b26a0bfSTrond Myklebust { 7100b26a0bfSTrond Myklebust return (mode >> 12) & 15; 7110b26a0bfSTrond Myklebust } 7120b26a0bfSTrond Myklebust 7130b26a0bfSTrond Myklebust /* 7148d5658c9STrond Myklebust * Determine the number of pages in an array of length 'len' and 7158d5658c9STrond Myklebust * with a base offset of 'base' 7168d5658c9STrond Myklebust */ 7178d5658c9STrond Myklebust static inline 7188d5658c9STrond Myklebust unsigned int nfs_page_array_len(unsigned int base, size_t len) 7198d5658c9STrond Myklebust { 7208d5658c9STrond Myklebust return ((unsigned long)len + (unsigned long)base + 7218d5658c9STrond Myklebust PAGE_SIZE - 1) >> PAGE_SHIFT; 7228d5658c9STrond Myklebust } 7230110ee15STrond Myklebust 7243a1556e8STrond Myklebust /* 7253a1556e8STrond Myklebust * Convert a struct timespec into a 64-bit change attribute 7263a1556e8STrond Myklebust * 7273a1556e8STrond Myklebust * This does approximately the same thing as timespec_to_ns(), 7283a1556e8STrond Myklebust * but for calculation efficiency, we multiply the seconds by 7293a1556e8STrond Myklebust * 1024*1024*1024. 7303a1556e8STrond Myklebust */ 7313a1556e8STrond Myklebust static inline 732e86d5a02STrond Myklebust u64 nfs_timespec_to_change_attr(const struct timespec64 *ts) 7333a1556e8STrond Myklebust { 7343a1556e8STrond Myklebust return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 7353a1556e8STrond Myklebust } 7361264a2f0STrond Myklebust 7371264a2f0STrond Myklebust #ifdef CONFIG_CRC32 7381264a2f0STrond Myklebust /** 7391264a2f0STrond Myklebust * nfs_fhandle_hash - calculate the crc32 hash for the filehandle 7401264a2f0STrond Myklebust * @fh - pointer to filehandle 7411264a2f0STrond Myklebust * 7421264a2f0STrond Myklebust * returns a crc32 hash for the filehandle that is compatible with 7431264a2f0STrond Myklebust * the one displayed by "wireshark". 7441264a2f0STrond Myklebust */ 7451264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7461264a2f0STrond Myklebust { 7471264a2f0STrond Myklebust return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); 7481264a2f0STrond Myklebust } 74948c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) 75048c9579aSOlga Kornievskaia { 75148c9579aSOlga Kornievskaia return ~crc32_le(0xFFFFFFFF, &stateid->other[0], 75248c9579aSOlga Kornievskaia NFS4_STATEID_OTHER_SIZE); 75348c9579aSOlga Kornievskaia } 7541264a2f0STrond Myklebust #else 7551264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7561264a2f0STrond Myklebust { 7571264a2f0STrond Myklebust return 0; 7581264a2f0STrond Myklebust } 75948c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) 76048c9579aSOlga Kornievskaia { 76148c9579aSOlga Kornievskaia return 0; 76248c9579aSOlga Kornievskaia } 7631264a2f0STrond Myklebust #endif 7640bcbf039SPeng Tao 7650bcbf039SPeng Tao static inline bool nfs_error_is_fatal(int err) 7660bcbf039SPeng Tao { 7670bcbf039SPeng Tao switch (err) { 7680bcbf039SPeng Tao case -ERESTARTSYS: 7697dc58ca5STrond Myklebust case -EINTR: 77054551d85STrond Myklebust case -EACCES: 77154551d85STrond Myklebust case -EDQUOT: 77254551d85STrond Myklebust case -EFBIG: 7730bcbf039SPeng Tao case -EIO: 7740bcbf039SPeng Tao case -ENOSPC: 7750bcbf039SPeng Tao case -EROFS: 77654551d85STrond Myklebust case -ESTALE: 7770bcbf039SPeng Tao case -E2BIG: 7782dc23affSTrond Myklebust case -ENOMEM: 77911982a7cSTrond Myklebust case -ETIMEDOUT: 7800bcbf039SPeng Tao return true; 7810bcbf039SPeng Tao default: 7820bcbf039SPeng Tao return false; 7830bcbf039SPeng Tao } 7840bcbf039SPeng Tao } 785bf4b4905SNeilBrown 7868f54c7a4STrond Myklebust static inline bool nfs_error_is_fatal_on_server(int err) 7878f54c7a4STrond Myklebust { 7888f54c7a4STrond Myklebust switch (err) { 7898f54c7a4STrond Myklebust case 0: 7908f54c7a4STrond Myklebust case -ERESTARTSYS: 7918f54c7a4STrond Myklebust case -EINTR: 7928f54c7a4STrond Myklebust return false; 7938f54c7a4STrond Myklebust } 7948f54c7a4STrond Myklebust return nfs_error_is_fatal(err); 7958f54c7a4STrond Myklebust } 7969954bf92SDavid Howells 7979954bf92SDavid Howells /* 7989954bf92SDavid Howells * Select between a default port value and a user-specified port value. 7999954bf92SDavid Howells * If a zero value is set, then autobind will be used. 8009954bf92SDavid Howells */ 8019954bf92SDavid Howells static inline void nfs_set_port(struct sockaddr *sap, int *port, 8029954bf92SDavid Howells const unsigned short default_port) 8039954bf92SDavid Howells { 8049954bf92SDavid Howells if (*port == NFS_UNSPEC_PORT) 8059954bf92SDavid Howells *port = default_port; 8069954bf92SDavid Howells 8079954bf92SDavid Howells rpc_set_port(sap, *port); 8089954bf92SDavid Howells } 809