1f7b422b1SDavid Howells /* 2f7b422b1SDavid Howells * NFS internal definitions 3f7b422b1SDavid Howells */ 4f7b422b1SDavid Howells 5eedc020eSAndy Adamson #include "nfs4_fs.h" 6f7b422b1SDavid Howells #include <linux/mount.h> 7f9c3a380SEric Paris #include <linux/security.h> 81264a2f0STrond Myklebust #include <linux/crc32.h> 947af81f2SPeng Tao #include <linux/nfs_page.h> 10f7b422b1SDavid Howells 1108734048SDavid Howells #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) 1208734048SDavid Howells 1354ceac45SDavid Howells struct nfs_string; 1454ceac45SDavid Howells 1554ceac45SDavid Howells /* Maximum number of readahead requests 1654ceac45SDavid Howells * FIXME: this should really be a sysctl so that users may tune it to suit 1754ceac45SDavid Howells * their needs. People that do NFS over a slow network, might for 1854ceac45SDavid Howells * instance want to reduce it to something closer to 1 for improved 1954ceac45SDavid Howells * interactive response. 2054ceac45SDavid Howells */ 2154ceac45SDavid Howells #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) 2254ceac45SDavid Howells 237ebb9315SBryan Schumaker static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) 247ebb9315SBryan Schumaker { 257ebb9315SBryan Schumaker if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid)) 267ebb9315SBryan Schumaker fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT; 277ebb9315SBryan Schumaker } 287ebb9315SBryan Schumaker 29533eb461SAndy Adamson static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) 30533eb461SAndy Adamson { 31533eb461SAndy Adamson if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) || 32533eb461SAndy Adamson (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) && 33533eb461SAndy Adamson ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0))) 34533eb461SAndy Adamson return 0; 35533eb461SAndy Adamson return 1; 36533eb461SAndy Adamson } 37533eb461SAndy Adamson 38f7b422b1SDavid Howells struct nfs_clone_mount { 39f7b422b1SDavid Howells const struct super_block *sb; 40f7b422b1SDavid Howells const struct dentry *dentry; 41f7b422b1SDavid Howells struct nfs_fh *fh; 42f7b422b1SDavid Howells struct nfs_fattr *fattr; 43f7b422b1SDavid Howells char *hostname; 44f7b422b1SDavid Howells char *mnt_path; 456677d095SChuck Lever struct sockaddr *addr; 466677d095SChuck Lever size_t addrlen; 47f7b422b1SDavid Howells rpc_authflavor_t authflavor; 48f7b422b1SDavid Howells }; 49f7b422b1SDavid Howells 506b18eaa0S\"Talpey, Thomas\ /* 51a14017dbSChuck Lever * Note: RFC 1813 doesn't limit the number of auth flavors that 52a14017dbSChuck Lever * a server can return, so make something up. 53a14017dbSChuck Lever */ 54a14017dbSChuck Lever #define NFS_MAX_SECFLAVORS (12) 55a14017dbSChuck Lever 56a14017dbSChuck Lever /* 574cfd74fcSChuck Lever * Value used if the user did not specify a port value. 584cfd74fcSChuck Lever */ 594cfd74fcSChuck Lever #define NFS_UNSPEC_PORT (-1) 604cfd74fcSChuck Lever 614cfd74fcSChuck Lever /* 6256e4ebf8SBryan Schumaker * Maximum number of pages that readdir can use for creating 6356e4ebf8SBryan Schumaker * a vmapped array of pages. 6456e4ebf8SBryan Schumaker */ 6556e4ebf8SBryan Schumaker #define NFS_MAX_READDIR_PAGES 8 6656e4ebf8SBryan Schumaker 67fcf10398SBryan Schumaker struct nfs_client_initdata { 68fcf10398SBryan Schumaker unsigned long init_flags; 69fcf10398SBryan Schumaker const char *hostname; 70fcf10398SBryan Schumaker const struct sockaddr *addr; 71fcf10398SBryan Schumaker size_t addrlen; 72ab7017a3SBryan Schumaker struct nfs_subversion *nfs_mod; 73fcf10398SBryan Schumaker int proto; 74fcf10398SBryan Schumaker u32 minorversion; 75fcf10398SBryan Schumaker struct net *net; 76fcf10398SBryan Schumaker }; 77fcf10398SBryan Schumaker 7856e4ebf8SBryan Schumaker /* 796b18eaa0S\"Talpey, Thomas\ * In-kernel mount arguments 806b18eaa0S\"Talpey, Thomas\ */ 816b18eaa0S\"Talpey, Thomas\ struct nfs_parsed_mount_data { 826b18eaa0S\"Talpey, Thomas\ int flags; 838cb7f74eSChuck Lever unsigned int rsize, wsize; 848cb7f74eSChuck Lever unsigned int timeo, retrans; 858cb7f74eSChuck Lever unsigned int acregmin, acregmax, 866b18eaa0S\"Talpey, Thomas\ acdirmin, acdirmax; 878cb7f74eSChuck Lever unsigned int namlen; 88b797cac7SDavid Howells unsigned int options; 896b18eaa0S\"Talpey, Thomas\ unsigned int bsize; 90a3f73c27SWeston Andros Adamson struct nfs_auth_info auth_info; 91a3f73c27SWeston Andros Adamson rpc_authflavor_t selected_flavor; 926b18eaa0S\"Talpey, Thomas\ char *client_address; 93764302ccSChuck Lever unsigned int version; 943fd5be9eSMike Sager unsigned int minorversion; 9508734048SDavid Howells char *fscache_uniq; 96b72e4f42SBryan Schumaker bool need_mount; 976b18eaa0S\"Talpey, Thomas\ 986b18eaa0S\"Talpey, Thomas\ struct { 994c568017SChuck Lever struct sockaddr_storage address; 1004c568017SChuck Lever size_t addrlen; 1016b18eaa0S\"Talpey, Thomas\ char *hostname; 10278fa701fSChuck Lever u32 version; 1034cfd74fcSChuck Lever int port; 10478fa701fSChuck Lever unsigned short protocol; 1056b18eaa0S\"Talpey, Thomas\ } mount_server; 1066b18eaa0S\"Talpey, Thomas\ 1076b18eaa0S\"Talpey, Thomas\ struct { 1084c568017SChuck Lever struct sockaddr_storage address; 1094c568017SChuck Lever size_t addrlen; 1106b18eaa0S\"Talpey, Thomas\ char *hostname; 1116b18eaa0S\"Talpey, Thomas\ char *export_path; 1124cfd74fcSChuck Lever int port; 11378fa701fSChuck Lever unsigned short protocol; 1146b18eaa0S\"Talpey, Thomas\ } nfs_server; 115f9c3a380SEric Paris 116f9c3a380SEric Paris struct security_mnt_opts lsm_opts; 117e50a7a1aSStanislav Kinsbursky struct net *net; 1186b18eaa0S\"Talpey, Thomas\ }; 1196b18eaa0S\"Talpey, Thomas\ 120146ec944SChuck Lever /* mount_clnt.c */ 121c5d120f8SChuck Lever struct nfs_mount_request { 122c5d120f8SChuck Lever struct sockaddr *sap; 123c5d120f8SChuck Lever size_t salen; 124c5d120f8SChuck Lever char *hostname; 125c5d120f8SChuck Lever char *dirpath; 126c5d120f8SChuck Lever u32 version; 127c5d120f8SChuck Lever unsigned short protocol; 128c5d120f8SChuck Lever struct nfs_fh *fh; 12950a737f8SChuck Lever int noresvport; 1308e02f6b9SChuck Lever unsigned int *auth_flav_len; 1318e02f6b9SChuck Lever rpc_authflavor_t *auth_flavs; 1326d59b8d5SStanislav Kinsbursky struct net *net; 133c5d120f8SChuck Lever }; 134c5d120f8SChuck Lever 135fbdefd64SBryan Schumaker struct nfs_mount_info { 136fbdefd64SBryan Schumaker void (*fill_super)(struct super_block *, struct nfs_mount_info *); 137fbdefd64SBryan Schumaker int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); 138fbdefd64SBryan Schumaker struct nfs_parsed_mount_data *parsed; 139fbdefd64SBryan Schumaker struct nfs_clone_mount *cloned; 140fbdefd64SBryan Schumaker struct nfs_fh *mntfh; 141fbdefd64SBryan Schumaker }; 142fbdefd64SBryan Schumaker 143c5d120f8SChuck Lever extern int nfs_mount(struct nfs_mount_request *info); 1440b524123SChuck Lever extern void nfs_umount(const struct nfs_mount_request *info); 145146ec944SChuck Lever 14624c8dbbbSDavid Howells /* client.c */ 147a613fa16STrond Myklebust extern const struct rpc_program nfs_program; 1486b13168bSStanislav Kinsbursky extern void nfs_clients_init(struct net *net); 1496663ee7fSBryan Schumaker extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); 150428360d7SBryan Schumaker int nfs_create_rpc_client(struct nfs_client *, const struct rpc_timeout *, rpc_authflavor_t); 151fcf10398SBryan Schumaker struct nfs_client *nfs_get_client(const struct nfs_client_initdata *, 152fcf10398SBryan Schumaker const struct rpc_timeout *, const char *, 153fcf10398SBryan Schumaker rpc_authflavor_t); 154fcf10398SBryan Schumaker int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); 155fcf10398SBryan Schumaker void nfs_server_insert_lists(struct nfs_server *); 15632e62b7cSChuck Lever void nfs_server_remove_lists(struct nfs_server *); 157fcf10398SBryan Schumaker void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int); 158fcf10398SBryan Schumaker int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, 159fcf10398SBryan Schumaker rpc_authflavor_t); 160fcf10398SBryan Schumaker struct nfs_server *nfs_alloc_server(void); 161fcf10398SBryan Schumaker void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); 16254ceac45SDavid Howells 16328cd1b3fSStanislav Kinsbursky extern void nfs_cleanup_cb_ident_idr(struct net *); 16424c8dbbbSDavid Howells extern void nfs_put_client(struct nfs_client *); 165cdb7ecedSBryan Schumaker extern void nfs_free_client(struct nfs_client *); 16628cd1b3fSStanislav Kinsbursky extern struct nfs_client *nfs4_find_client_ident(struct net *, int); 167c36fca52SAndy Adamson extern struct nfs_client * 168c7add9a9SStanislav Kinsbursky nfs4_find_client_sessionid(struct net *, const struct sockaddr *, 169459de2edSBryan Schumaker struct nfs4_sessionid *, u32); 1701179acc6SBryan Schumaker extern struct nfs_server *nfs_create_server(struct nfs_mount_info *, 171ab7017a3SBryan Schumaker struct nfs_subversion *); 17291ea40b9S\"Talpey, Thomas\ extern struct nfs_server *nfs4_create_server( 1731179acc6SBryan Schumaker struct nfs_mount_info *, 1741179acc6SBryan Schumaker struct nfs_subversion *); 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); 1854697bd5eSTrond Myklebust extern int nfs_wait_client_init_complete(const struct nfs_client *clp); 18676db6d95SAndy Adamson extern void nfs_mark_client_ready(struct nfs_client *clp, int state); 187d83217c1SAndy Adamson extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, 188d83217c1SAndy Adamson const struct sockaddr *ds_addr, 18998fc685aSAndy Adamson int ds_addrlen, int ds_proto, 19098fc685aSAndy Adamson unsigned int ds_timeo, 191064172f3SPeng Tao unsigned int ds_retrans, 19230626f9cSPeng Tao u32 minor_version, 193064172f3SPeng Tao rpc_authflavor_t au_flavor); 1940e20162eSAndy Adamson extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, 1950e20162eSAndy Adamson struct inode *); 1961a04c6e1SPeng Tao extern struct nfs_client *nfs3_set_ds_client(struct nfs_client *mds_clp, 1971a04c6e1SPeng Tao const struct sockaddr *ds_addr, int ds_addrlen, 1981a04c6e1SPeng Tao int ds_proto, unsigned int ds_timeo, 1991a04c6e1SPeng Tao unsigned int ds_retrans, rpc_authflavor_t au_flavor); 2006aaca566SDavid Howells #ifdef CONFIG_PROC_FS 2016aaca566SDavid Howells extern int __init nfs_fs_proc_init(void); 2026aaca566SDavid Howells extern void nfs_fs_proc_exit(void); 20365b38851SEric W. Biederman extern int nfs_fs_proc_net_init(struct net *net); 20465b38851SEric W. Biederman extern void nfs_fs_proc_net_exit(struct net *net); 2056aaca566SDavid Howells #else 20665b38851SEric W. Biederman static inline int nfs_fs_proc_net_init(struct net *net) 20765b38851SEric W. Biederman { 20865b38851SEric W. Biederman return 0; 20965b38851SEric W. Biederman } 21065b38851SEric W. Biederman static inline void nfs_fs_proc_net_exit(struct net *net) 21165b38851SEric W. Biederman { 21265b38851SEric W. Biederman } 2136aaca566SDavid Howells static inline int nfs_fs_proc_init(void) 2146aaca566SDavid Howells { 2156aaca566SDavid Howells return 0; 2166aaca566SDavid Howells } 2176aaca566SDavid Howells static inline void nfs_fs_proc_exit(void) 2186aaca566SDavid Howells { 2196aaca566SDavid Howells } 2206aaca566SDavid Howells #endif 22124c8dbbbSDavid Howells 222f7b422b1SDavid Howells /* callback_xdr.c */ 223f7b422b1SDavid Howells extern struct svc_version nfs4_callback_version1; 22407bccc2dSAlexandros Batsakis extern struct svc_version nfs4_callback_version4; 225f7b422b1SDavid Howells 2264db6e0b7SFred Isaman struct nfs_pageio_descriptor; 227f7b422b1SDavid Howells /* pagelist.c */ 228f7b422b1SDavid Howells extern int __init nfs_init_nfspagecache(void); 229266bee88SDavid Brownell extern void nfs_destroy_nfspagecache(void); 230f7b422b1SDavid Howells extern int __init nfs_init_readpagecache(void); 231266bee88SDavid Brownell extern void nfs_destroy_readpagecache(void); 232f7b422b1SDavid Howells extern int __init nfs_init_writepagecache(void); 233266bee88SDavid Brownell extern void nfs_destroy_writepagecache(void); 234f7b422b1SDavid Howells 235f7b422b1SDavid Howells extern int __init nfs_init_directcache(void); 236266bee88SDavid Brownell extern void nfs_destroy_directcache(void); 2374db6e0b7SFred Isaman extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 2384db6e0b7SFred Isaman struct nfs_pgio_header *hdr, 2394db6e0b7SFred Isaman void (*release)(struct nfs_pgio_header *hdr)); 2404db6e0b7SFred Isaman void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 241210c7c17SBenjamin Coddington int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); 242577b4232STrond Myklebust 24341d8d5b7SAnna Schumaker extern const struct nfs_pageio_ops nfs_pgio_rw_ops; 2441e7f3a48SWeston Andros Adamson struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); 2451e7f3a48SWeston Andros Adamson void nfs_pgio_header_free(struct nfs_pgio_header *); 246d45f60c6SWeston Andros Adamson void nfs_pgio_data_destroy(struct nfs_pgio_header *); 247ef2c488cSAnna Schumaker int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); 24846a5ab47SPeng Tao int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, 24946a5ab47SPeng Tao struct rpc_cred *cred, const struct nfs_rpc_ops *rpc_ops, 25046a5ab47SPeng Tao const struct rpc_call_ops *call_ops, int how, int flags); 251d4581383SWeston Andros Adamson void nfs_free_request(struct nfs_page *req); 25248d635f1SPeng Tao struct nfs_pgio_mirror * 25348d635f1SPeng Tao nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); 25400bfa30aSAnna Schumaker 25547af81f2SPeng Tao static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc) 25647af81f2SPeng Tao { 25747af81f2SPeng Tao WARN_ON_ONCE(desc->pg_mirror_count < 1); 25847af81f2SPeng Tao return desc->pg_mirror_count > 1; 25947af81f2SPeng Tao } 26047af81f2SPeng Tao 261138a2935STrond Myklebust static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, 262138a2935STrond Myklebust const struct nfs_open_context *ctx2) 263138a2935STrond Myklebust { 264138a2935STrond Myklebust return ctx1->cred == ctx2->cred && ctx1->state == ctx2->state; 265138a2935STrond Myklebust } 266138a2935STrond Myklebust 267f7b422b1SDavid Howells /* nfs2xdr.c */ 268f7b422b1SDavid Howells extern struct rpc_procinfo nfs_procedures[]; 269573c4e1eSChuck Lever extern int nfs2_decode_dirent(struct xdr_stream *, 270573c4e1eSChuck Lever struct nfs_entry *, int); 271f7b422b1SDavid Howells 272f7b422b1SDavid Howells /* nfs3xdr.c */ 273f7b422b1SDavid Howells extern struct rpc_procinfo nfs3_procedures[]; 274573c4e1eSChuck Lever extern int nfs3_decode_dirent(struct xdr_stream *, 275573c4e1eSChuck Lever struct nfs_entry *, int); 276f7b422b1SDavid Howells 277f7b422b1SDavid Howells /* nfs4xdr.c */ 27889d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 279573c4e1eSChuck Lever extern int nfs4_decode_dirent(struct xdr_stream *, 280573c4e1eSChuck Lever struct nfs_entry *, int); 2817d4e2747SDavid Howells #endif 2822449ea2eSAlexandros Batsakis #ifdef CONFIG_NFS_V4_1 2832449ea2eSAlexandros Batsakis extern const u32 nfs41_maxread_overhead; 2842449ea2eSAlexandros Batsakis extern const u32 nfs41_maxwrite_overhead; 285f1c097beSAndy Adamson extern const u32 nfs41_maxgetdevinfo_overhead; 2862449ea2eSAlexandros Batsakis #endif 287f7b422b1SDavid Howells 288f7b422b1SDavid Howells /* nfs4proc.c */ 28989d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 290f7b422b1SDavid Howells extern struct rpc_procinfo nfs4_procedures[]; 291d75d5414SAndrew Morton #endif 292f7b422b1SDavid Howells 293694e096fSAnna Schumaker #ifdef CONFIG_NFS_V4_SECURITY_LABEL 294694e096fSAnna Schumaker extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); 295a49c2691SKinglong Mee static inline struct nfs4_label * 296a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 297a49c2691SKinglong Mee { 298a49c2691SKinglong Mee if (!dst || !src) 299a49c2691SKinglong Mee return NULL; 300a49c2691SKinglong Mee 301a49c2691SKinglong Mee if (src->len > NFS4_MAXLABELLEN) 302a49c2691SKinglong Mee return NULL; 303a49c2691SKinglong Mee 304a49c2691SKinglong Mee dst->lfs = src->lfs; 305a49c2691SKinglong Mee dst->pi = src->pi; 306a49c2691SKinglong Mee dst->len = src->len; 307a49c2691SKinglong Mee memcpy(dst->label, src->label, src->len); 308a49c2691SKinglong Mee 309a49c2691SKinglong Mee return dst; 310a49c2691SKinglong Mee } 311694e096fSAnna Schumaker static inline void nfs4_label_free(struct nfs4_label *label) 312694e096fSAnna Schumaker { 313694e096fSAnna Schumaker if (label) { 314694e096fSAnna Schumaker kfree(label->label); 315694e096fSAnna Schumaker kfree(label); 316694e096fSAnna Schumaker } 317694e096fSAnna Schumaker return; 318694e096fSAnna Schumaker } 319fd1defc2STrond Myklebust 320fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 321fd1defc2STrond Myklebust { 322fd1defc2STrond Myklebust if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) 323fd1defc2STrond Myklebust nfsi->cache_validity |= NFS_INO_INVALID_LABEL; 324fd1defc2STrond Myklebust } 325694e096fSAnna Schumaker #else 326694e096fSAnna Schumaker static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } 327694e096fSAnna Schumaker static inline void nfs4_label_free(void *label) {} 328fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 329fd1defc2STrond Myklebust { 330fd1defc2STrond Myklebust } 331a49c2691SKinglong Mee static inline struct nfs4_label * 332a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 333a49c2691SKinglong Mee { 334a49c2691SKinglong Mee return NULL; 335a49c2691SKinglong Mee } 336694e096fSAnna Schumaker #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 337694e096fSAnna Schumaker 3387fe5c398STrond Myklebust /* proc.c */ 3397fe5c398STrond Myklebust void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 3408cab4c39SChuck Lever extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 34145a52a02SAndy Adamson const struct rpc_timeout *timeparms, 342f8407299SAndy Adamson const char *ip_addr); 3437fe5c398STrond Myklebust 344979df72eSTrond Myklebust /* dir.c */ 345311324adSTrond Myklebust extern void nfs_force_use_readdirplus(struct inode *dir); 3461ab6c499SDave Chinner extern unsigned long nfs_access_cache_count(struct shrinker *shrink, 3471ab6c499SDave Chinner struct shrink_control *sc); 3481ab6c499SDave Chinner extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, 3491495f230SYing Han struct shrink_control *sc); 350597d9289SBryan Schumaker struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 351597d9289SBryan Schumaker int nfs_create(struct inode *, struct dentry *, umode_t, bool); 352597d9289SBryan Schumaker int nfs_mkdir(struct inode *, struct dentry *, umode_t); 353597d9289SBryan Schumaker int nfs_rmdir(struct inode *, struct dentry *); 354597d9289SBryan Schumaker int nfs_unlink(struct inode *, struct dentry *); 355597d9289SBryan Schumaker int nfs_symlink(struct inode *, struct dentry *, const char *); 356597d9289SBryan Schumaker int nfs_link(struct dentry *, struct inode *, struct dentry *); 357597d9289SBryan Schumaker int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); 358597d9289SBryan Schumaker int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); 359979df72eSTrond Myklebust 360ce4ef7c0SBryan Schumaker /* file.c */ 3614ff79bc7SChristoph Hellwig int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 362ce4ef7c0SBryan Schumaker loff_t nfs_file_llseek(struct file *, loff_t, int); 3633aa2d199SAl Viro ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); 364ce4ef7c0SBryan Schumaker ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *, 365ce4ef7c0SBryan Schumaker size_t, unsigned int); 366ce4ef7c0SBryan Schumaker int nfs_file_mmap(struct file *, struct vm_area_struct *); 367edaf4369SAl Viro ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); 368ce4ef7c0SBryan Schumaker int nfs_file_release(struct inode *, struct file *); 369ce4ef7c0SBryan Schumaker int nfs_lock(struct file *, int, struct file_lock *); 370ce4ef7c0SBryan Schumaker int nfs_flock(struct file *, int, struct file_lock *); 371ce4ef7c0SBryan Schumaker int nfs_check_flags(int); 372ce4ef7c0SBryan Schumaker 373f7b422b1SDavid Howells /* inode.c */ 3745746006fSTrond Myklebust extern struct workqueue_struct *nfsiod_workqueue; 375f7b422b1SDavid Howells extern struct inode *nfs_alloc_inode(struct super_block *sb); 376f7b422b1SDavid Howells extern void nfs_destroy_inode(struct inode *); 377a9185b41SChristoph Hellwig extern int nfs_write_inode(struct inode *, struct writeback_control *); 378eed99357STrond Myklebust extern int nfs_drop_inode(struct inode *); 37919d87ca3SBryan Schumaker extern void nfs_clear_inode(struct inode *); 380b57922d9SAl Viro extern void nfs_evict_inode(struct inode *); 381f41f7418STrond Myklebust void nfs_zap_acl_cache(struct inode *inode); 382dfd01f02SPeter Zijlstra extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); 383210c7c17SBenjamin Coddington extern int nfs_wait_atomic_killable(atomic_t *p); 384f7b422b1SDavid Howells 385f7b422b1SDavid Howells /* super.c */ 3866a74490dSBryan Schumaker extern const struct super_operations nfs_sops; 387ab7017a3SBryan Schumaker extern struct file_system_type nfs_fs_type; 38854ceac45SDavid Howells extern struct file_system_type nfs_xdev_fs_type; 38989d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 39054ceac45SDavid Howells extern struct file_system_type nfs4_xdev_fs_type; 39154ceac45SDavid Howells extern struct file_system_type nfs4_referral_fs_type; 392f7b422b1SDavid Howells #endif 3934d4b69ddSWeston Andros Adamson bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); 394ff9099f2SBryan Schumaker struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, 395ff9099f2SBryan Schumaker struct nfs_subversion *); 396fbdefd64SBryan Schumaker void nfs_initialise_sb(struct super_block *); 397fbdefd64SBryan Schumaker int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); 398fbdefd64SBryan Schumaker int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); 399ab7017a3SBryan Schumaker struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *, 400ab7017a3SBryan Schumaker struct nfs_mount_info *, struct nfs_subversion *); 401fbdefd64SBryan Schumaker struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); 402fbdefd64SBryan Schumaker struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, 403fbdefd64SBryan Schumaker const char *, struct nfs_mount_info *); 404fbdefd64SBryan Schumaker void nfs_kill_super(struct super_block *); 405fbdefd64SBryan Schumaker void nfs_fill_super(struct super_block *, struct nfs_mount_info *); 4064ebd9ab3SDominik Hackl 407f7b422b1SDavid Howells extern struct rpc_stat nfs_rpcstat; 4084ebd9ab3SDominik Hackl 409f7b422b1SDavid Howells extern int __init register_nfs_fs(void); 410f7b422b1SDavid Howells extern void __exit unregister_nfs_fs(void); 411ea7c38feSTrond Myklebust extern bool nfs_sb_active(struct super_block *sb); 4121daef0a8STrond Myklebust extern void nfs_sb_deactive(struct super_block *sb); 413f7b422b1SDavid Howells 414a5864c99STrond Myklebust /* io.c */ 415a5864c99STrond Myklebust extern void nfs_start_io_read(struct inode *inode); 416a5864c99STrond Myklebust extern void nfs_end_io_read(struct inode *inode); 417a5864c99STrond Myklebust extern void nfs_start_io_write(struct inode *inode); 418a5864c99STrond Myklebust extern void nfs_end_io_write(struct inode *inode); 419a5864c99STrond Myklebust extern void nfs_start_io_direct(struct inode *inode); 420a5864c99STrond Myklebust extern void nfs_end_io_direct(struct inode *inode); 421a5864c99STrond Myklebust 422651b0e70STrond Myklebust static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) 423651b0e70STrond Myklebust { 424651b0e70STrond Myklebust return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0; 425651b0e70STrond Myklebust } 426651b0e70STrond Myklebust 427f7b422b1SDavid Howells /* namespace.c */ 42897a54868SBen Hutchings #define NFS_PATH_CANONICAL 1 429b514f872SAl Viro extern char *nfs_path(char **p, struct dentry *dentry, 43097a54868SBen Hutchings char *buffer, ssize_t buflen, unsigned flags); 43136d43a43SDavid Howells extern struct vfsmount *nfs_d_automount(struct path *path); 432281cad46SBryan Schumaker struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, 433281cad46SBryan Schumaker struct nfs_fh *, struct nfs_fattr *); 434281cad46SBryan Schumaker struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, 435281cad46SBryan Schumaker struct nfs_fattr *, rpc_authflavor_t); 436f7b422b1SDavid Howells 43754ceac45SDavid Howells /* getroot.c */ 4380d5839adSAl Viro extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, 4390d5839adSAl Viro const char *); 44089d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 4410d5839adSAl Viro extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, 4420d5839adSAl Viro const char *); 44354ceac45SDavid Howells 4445e6b1990STrond Myklebust extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); 4457d4e2747SDavid Howells #endif 446f7b422b1SDavid Howells 447061ae2edSFred Isaman struct nfs_pgio_completion_ops; 448f11c88afSAndy Adamson /* read.c */ 449584aa810SFred Isaman extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 450fab5fc25SChristoph Hellwig struct inode *inode, bool force_mds, 451584aa810SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 452f11c88afSAndy Adamson extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 453493292ddSTrond Myklebust extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 454e885de1aSTrond Myklebust 455fbdefd64SBryan Schumaker /* super.c */ 456fbdefd64SBryan Schumaker void nfs_clone_super(struct super_block *, struct nfs_mount_info *); 457fbdefd64SBryan Schumaker void nfs_umount_begin(struct super_block *); 458fbdefd64SBryan Schumaker int nfs_statfs(struct dentry *, struct kstatfs *); 459fbdefd64SBryan Schumaker int nfs_show_options(struct seq_file *, struct dentry *); 460fbdefd64SBryan Schumaker int nfs_show_devname(struct seq_file *, struct dentry *); 461fbdefd64SBryan Schumaker int nfs_show_path(struct seq_file *, struct dentry *); 462fbdefd64SBryan Schumaker int nfs_show_stats(struct seq_file *, struct dentry *); 463fbdefd64SBryan Schumaker int nfs_remount(struct super_block *sb, int *flags, char *raw_data); 464fbdefd64SBryan Schumaker 465def6ed7eSAndy Adamson /* write.c */ 4661763da12SFred Isaman extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 467a20c93e3SChristoph Hellwig struct inode *inode, int ioflags, bool force_mds, 4681763da12SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 469dce81290STrond Myklebust extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 4700b7c0153SFred Isaman extern void nfs_commit_free(struct nfs_commit_data *p); 471def6ed7eSAndy Adamson extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 4720b7c0153SFred Isaman extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 4730b7c0153SFred Isaman extern int nfs_initiate_commit(struct rpc_clnt *clnt, 4740b7c0153SFred Isaman struct nfs_commit_data *data, 475c36aae9aSPeng Tao const struct nfs_rpc_ops *nfs_ops, 476e0c2b380SFred Isaman const struct rpc_call_ops *call_ops, 4779f0ec176SAndy Adamson int how, int flags); 4780b7c0153SFred Isaman extern void nfs_init_commit(struct nfs_commit_data *data, 479e0c2b380SFred Isaman struct list_head *head, 480f453a54aSFred Isaman struct pnfs_layout_segment *lseg, 481f453a54aSFred Isaman struct nfs_commit_info *cinfo); 4821763da12SFred Isaman int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 4831763da12SFred Isaman struct nfs_commit_info *cinfo, int max); 484ce59515cSAnna Schumaker unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); 4851763da12SFred Isaman int nfs_scan_commit(struct inode *inode, struct list_head *dst, 4861763da12SFred Isaman struct nfs_commit_info *cinfo); 4871763da12SFred Isaman void nfs_mark_request_commit(struct nfs_page *req, 4881763da12SFred Isaman struct pnfs_layout_segment *lseg, 489b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 490b57ff130SWeston Andros Adamson u32 ds_commit_idx); 491c65e6254SWeston Andros Adamson int nfs_write_need_commit(struct nfs_pgio_header *); 492a08a8cd3STrond Myklebust void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); 49367911c8fSAnna Schumaker int nfs_commit_file(struct file *file, struct nfs_write_verifier *verf); 4941763da12SFred Isaman int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 4951763da12SFred Isaman int how, struct nfs_commit_info *cinfo); 496e0c2b380SFred Isaman void nfs_retry_commit(struct list_head *page_list, 497ea2cf228SFred Isaman struct pnfs_layout_segment *lseg, 498b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 499b57ff130SWeston Andros Adamson u32 ds_commit_idx); 5000b7c0153SFred Isaman void nfs_commitdata_release(struct nfs_commit_data *data); 5016272dcc6SAnna Schumaker void nfs_request_add_commit_list(struct nfs_page *req, 502ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 50386d80f97STrond Myklebust void nfs_request_add_commit_list_locked(struct nfs_page *req, 50486d80f97STrond Myklebust struct list_head *dst, 50586d80f97STrond Myklebust struct nfs_commit_info *cinfo); 506ea2cf228SFred Isaman void nfs_request_remove_commit_list(struct nfs_page *req, 507ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 508ea2cf228SFred Isaman void nfs_init_cinfo(struct nfs_commit_info *cinfo, 509ea2cf228SFred Isaman struct inode *inode, 510ea2cf228SFred Isaman struct nfs_direct_req *dreq); 511dc24826bSAndy Adamson int nfs_key_timeout_notify(struct file *filp, struct inode *inode); 512dc24826bSAndy Adamson bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx); 513a7d42ddbSWeston Andros Adamson void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); 514e0c2b380SFred Isaman 515837bb1d7STrond Myklebust int nfs_filemap_write_and_wait_range(struct address_space *mapping, 516837bb1d7STrond Myklebust loff_t lstart, loff_t lend); 517837bb1d7STrond Myklebust 518a5314a74STrond Myklebust #ifdef CONFIG_NFS_V4_1 519a5314a74STrond Myklebust static inline 520a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 521a5314a74STrond Myklebust { 522a5314a74STrond Myklebust int i; 523a5314a74STrond Myklebust 524a5314a74STrond Myklebust for (i = 0; i < cinfo->nbuckets; i++) 525a5314a74STrond Myklebust cinfo->buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; 526a5314a74STrond Myklebust } 527a5314a74STrond Myklebust #else 528a5314a74STrond Myklebust static inline 529a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 530a5314a74STrond Myklebust { 531a5314a74STrond Myklebust } 532a5314a74STrond Myklebust #endif 533a5314a74STrond Myklebust 534a5314a74STrond Myklebust 535074cc1deSTrond Myklebust #ifdef CONFIG_MIGRATION 536074cc1deSTrond Myklebust extern int nfs_migrate_page(struct address_space *, 537a6bc32b8SMel Gorman struct page *, struct page *, enum migrate_mode); 538074cc1deSTrond Myklebust #else 539074cc1deSTrond Myklebust #define nfs_migrate_page NULL 540074cc1deSTrond Myklebust #endif 541def6ed7eSAndy Adamson 5428fc3c386STrond Myklebust static inline int 5438fc3c386STrond Myklebust nfs_write_verifier_cmp(const struct nfs_write_verifier *v1, 5448fc3c386STrond Myklebust const struct nfs_write_verifier *v2) 5458fc3c386STrond Myklebust { 5468fc3c386STrond Myklebust return memcmp(v1->data, v2->data, sizeof(v1->data)); 5478fc3c386STrond Myklebust } 5488fc3c386STrond Myklebust 5490e862a40SJeff Layton /* unlink.c */ 5500e862a40SJeff Layton extern struct rpc_task * 5510e862a40SJeff Layton nfs_async_rename(struct inode *old_dir, struct inode *new_dir, 5520e862a40SJeff Layton struct dentry *old_dentry, struct dentry *new_dentry, 5530e862a40SJeff Layton void (*complete)(struct rpc_task *, struct nfs_renamedata *)); 5540e862a40SJeff Layton extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); 5550e862a40SJeff Layton 5561763da12SFred Isaman /* direct.c */ 5571763da12SFred Isaman void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, 5581763da12SFred Isaman struct nfs_direct_req *dreq); 5596296556fSPeng Tao extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); 5601763da12SFred Isaman 561cccef3b9SAndy Adamson /* nfs4proc.c */ 562d45f60c6SWeston Andros Adamson extern void __nfs4_read_done_cb(struct nfs_pgio_header *); 5638cab4c39SChuck Lever extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 56445a52a02SAndy Adamson const struct rpc_timeout *timeparms, 565f8407299SAndy Adamson const char *ip_addr); 56605f4c350SChuck Lever extern int nfs40_walk_client_list(struct nfs_client *clp, 56705f4c350SChuck Lever struct nfs_client **result, 56805f4c350SChuck Lever struct rpc_cred *cred); 56905f4c350SChuck Lever extern int nfs41_walk_client_list(struct nfs_client *clp, 57005f4c350SChuck Lever struct nfs_client **result, 57105f4c350SChuck Lever struct rpc_cred *cred); 572cccef3b9SAndy Adamson 573ea7c38feSTrond Myklebust static inline struct inode *nfs_igrab_and_active(struct inode *inode) 574ea7c38feSTrond Myklebust { 575ea7c38feSTrond Myklebust inode = igrab(inode); 576ea7c38feSTrond Myklebust if (inode != NULL && !nfs_sb_active(inode->i_sb)) { 577ea7c38feSTrond Myklebust iput(inode); 578ea7c38feSTrond Myklebust inode = NULL; 579ea7c38feSTrond Myklebust } 580ea7c38feSTrond Myklebust return inode; 581ea7c38feSTrond Myklebust } 582ea7c38feSTrond Myklebust 583ea7c38feSTrond Myklebust static inline void nfs_iput_and_deactive(struct inode *inode) 584ea7c38feSTrond Myklebust { 585ea7c38feSTrond Myklebust if (inode != NULL) { 586ea7c38feSTrond Myklebust struct super_block *sb = inode->i_sb; 587ea7c38feSTrond Myklebust 588ea7c38feSTrond Myklebust iput(inode); 589ea7c38feSTrond Myklebust nfs_sb_deactive(sb); 590ea7c38feSTrond Myklebust } 591ea7c38feSTrond Myklebust } 592ea7c38feSTrond Myklebust 593557134a3SAndy Adamson /* 594f7b422b1SDavid Howells * Determine the device name as a string 595f7b422b1SDavid Howells */ 596b514f872SAl Viro static inline char *nfs_devname(struct dentry *dentry, 597f7b422b1SDavid Howells char *buffer, ssize_t buflen) 598f7b422b1SDavid Howells { 599b514f872SAl Viro char *dummy; 60097a54868SBen Hutchings return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); 601f7b422b1SDavid Howells } 602f7b422b1SDavid Howells 603f7b422b1SDavid Howells /* 604f7b422b1SDavid Howells * Determine the actual block size (and log2 thereof) 605f7b422b1SDavid Howells */ 606f7b422b1SDavid Howells static inline 607f7b422b1SDavid Howells unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 608f7b422b1SDavid Howells { 609f7b422b1SDavid Howells /* make sure blocksize is a power of two */ 610f7b422b1SDavid Howells if ((bsize & (bsize - 1)) || nrbitsp) { 611f7b422b1SDavid Howells unsigned char nrbits; 612f7b422b1SDavid Howells 613f7b422b1SDavid Howells for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 614f7b422b1SDavid Howells ; 615f7b422b1SDavid Howells bsize = 1 << nrbits; 616f7b422b1SDavid Howells if (nrbitsp) 617f7b422b1SDavid Howells *nrbitsp = nrbits; 618f7b422b1SDavid Howells } 619f7b422b1SDavid Howells 620f7b422b1SDavid Howells return bsize; 621f7b422b1SDavid Howells } 622f7b422b1SDavid Howells 623f7b422b1SDavid Howells /* 624f7b422b1SDavid Howells * Calculate the number of 512byte blocks used. 625f7b422b1SDavid Howells */ 6269eaa67c6SChuck Lever static inline blkcnt_t nfs_calc_block_size(u64 tsize) 627f7b422b1SDavid Howells { 6289eaa67c6SChuck Lever blkcnt_t used = (tsize + 511) >> 9; 629f7b422b1SDavid Howells return (used > ULONG_MAX) ? ULONG_MAX : used; 630f7b422b1SDavid Howells } 631f7b422b1SDavid Howells 632f7b422b1SDavid Howells /* 633f7b422b1SDavid Howells * Compute and set NFS server blocksize 634f7b422b1SDavid Howells */ 635f7b422b1SDavid Howells static inline 636f7b422b1SDavid Howells unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 637f7b422b1SDavid Howells { 638f7b422b1SDavid Howells if (bsize < NFS_MIN_FILE_IO_SIZE) 639f7b422b1SDavid Howells bsize = NFS_DEF_FILE_IO_SIZE; 640f7b422b1SDavid Howells else if (bsize >= NFS_MAX_FILE_IO_SIZE) 641f7b422b1SDavid Howells bsize = NFS_MAX_FILE_IO_SIZE; 642f7b422b1SDavid Howells 643f7b422b1SDavid Howells return nfs_block_bits(bsize, nrbitsp); 644f7b422b1SDavid Howells } 645f7b422b1SDavid Howells 646f7b422b1SDavid Howells /* 647f7b422b1SDavid Howells * Determine the maximum file size for a superblock 648f7b422b1SDavid Howells */ 649f7b422b1SDavid Howells static inline 650f7b422b1SDavid Howells void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 651f7b422b1SDavid Howells { 652f7b422b1SDavid Howells sb->s_maxbytes = (loff_t)maxfilesize; 653f7b422b1SDavid Howells if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 654f7b422b1SDavid Howells sb->s_maxbytes = MAX_LFS_FILESIZE; 655f7b422b1SDavid Howells } 65649a70f27STrond Myklebust 65749a70f27STrond Myklebust /* 658d15bc38dSTom Haynes * Record the page as unstable and mark its inode as dirty. 659d15bc38dSTom Haynes */ 660d15bc38dSTom Haynes static inline 66186d80f97STrond Myklebust void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) 662d15bc38dSTom Haynes { 66386d80f97STrond Myklebust if (!cinfo->dreq) { 664d15bc38dSTom Haynes struct inode *inode = page_file_mapping(page)->host; 665d15bc38dSTom Haynes 666d15bc38dSTom Haynes inc_zone_page_state(page, NR_UNSTABLE_NFS); 66793f78d88STejun Heo inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE); 668d15bc38dSTom Haynes __mark_inode_dirty(inode, I_DIRTY_DATASYNC); 669d15bc38dSTom Haynes } 67086d80f97STrond Myklebust } 671d15bc38dSTom Haynes 672d15bc38dSTom Haynes /* 67349a70f27STrond Myklebust * Determine the number of bytes of data the page contains 67449a70f27STrond Myklebust */ 67549a70f27STrond Myklebust static inline 67649a70f27STrond Myklebust unsigned int nfs_page_length(struct page *page) 67749a70f27STrond Myklebust { 678d56b4ddfSMel Gorman loff_t i_size = i_size_read(page_file_mapping(page)->host); 67949a70f27STrond Myklebust 68049a70f27STrond Myklebust if (i_size > 0) { 681d56b4ddfSMel Gorman pgoff_t page_index = page_file_index(page); 68209cbfeafSKirill A. Shutemov pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; 683d56b4ddfSMel Gorman if (page_index < end_index) 68409cbfeafSKirill A. Shutemov return PAGE_SIZE; 685d56b4ddfSMel Gorman if (page_index == end_index) 68609cbfeafSKirill A. Shutemov return ((i_size - 1) & ~PAGE_MASK) + 1; 68749a70f27STrond Myklebust } 68849a70f27STrond Myklebust return 0; 68949a70f27STrond Myklebust } 6908d5658c9STrond Myklebust 6918d5658c9STrond Myklebust /* 6920b26a0bfSTrond Myklebust * Convert a umode to a dirent->d_type 6930b26a0bfSTrond Myklebust */ 6940b26a0bfSTrond Myklebust static inline 6950b26a0bfSTrond Myklebust unsigned char nfs_umode_to_dtype(umode_t mode) 6960b26a0bfSTrond Myklebust { 6970b26a0bfSTrond Myklebust return (mode >> 12) & 15; 6980b26a0bfSTrond Myklebust } 6990b26a0bfSTrond Myklebust 7000b26a0bfSTrond Myklebust /* 7018d5658c9STrond Myklebust * Determine the number of pages in an array of length 'len' and 7028d5658c9STrond Myklebust * with a base offset of 'base' 7038d5658c9STrond Myklebust */ 7048d5658c9STrond Myklebust static inline 7058d5658c9STrond Myklebust unsigned int nfs_page_array_len(unsigned int base, size_t len) 7068d5658c9STrond Myklebust { 7078d5658c9STrond Myklebust return ((unsigned long)len + (unsigned long)base + 7088d5658c9STrond Myklebust PAGE_SIZE - 1) >> PAGE_SHIFT; 7098d5658c9STrond Myklebust } 7100110ee15STrond Myklebust 7113a1556e8STrond Myklebust /* 7123a1556e8STrond Myklebust * Convert a struct timespec into a 64-bit change attribute 7133a1556e8STrond Myklebust * 7143a1556e8STrond Myklebust * This does approximately the same thing as timespec_to_ns(), 7153a1556e8STrond Myklebust * but for calculation efficiency, we multiply the seconds by 7163a1556e8STrond Myklebust * 1024*1024*1024. 7173a1556e8STrond Myklebust */ 7183a1556e8STrond Myklebust static inline 7193a1556e8STrond Myklebust u64 nfs_timespec_to_change_attr(const struct timespec *ts) 7203a1556e8STrond Myklebust { 7213a1556e8STrond Myklebust return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 7223a1556e8STrond Myklebust } 7231264a2f0STrond Myklebust 7241264a2f0STrond Myklebust #ifdef CONFIG_CRC32 7251264a2f0STrond Myklebust /** 7261264a2f0STrond Myklebust * nfs_fhandle_hash - calculate the crc32 hash for the filehandle 7271264a2f0STrond Myklebust * @fh - pointer to filehandle 7281264a2f0STrond Myklebust * 7291264a2f0STrond Myklebust * returns a crc32 hash for the filehandle that is compatible with 7301264a2f0STrond Myklebust * the one displayed by "wireshark". 7311264a2f0STrond Myklebust */ 7321264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7331264a2f0STrond Myklebust { 7341264a2f0STrond Myklebust return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); 7351264a2f0STrond Myklebust } 73648c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) 73748c9579aSOlga Kornievskaia { 73848c9579aSOlga Kornievskaia return ~crc32_le(0xFFFFFFFF, &stateid->other[0], 73948c9579aSOlga Kornievskaia NFS4_STATEID_OTHER_SIZE); 74048c9579aSOlga Kornievskaia } 7411264a2f0STrond Myklebust #else 7421264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7431264a2f0STrond Myklebust { 7441264a2f0STrond Myklebust return 0; 7451264a2f0STrond Myklebust } 74648c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) 74748c9579aSOlga Kornievskaia { 74848c9579aSOlga Kornievskaia return 0; 74948c9579aSOlga Kornievskaia } 7501264a2f0STrond Myklebust #endif 7510bcbf039SPeng Tao 7520bcbf039SPeng Tao static inline bool nfs_error_is_fatal(int err) 7530bcbf039SPeng Tao { 7540bcbf039SPeng Tao switch (err) { 7550bcbf039SPeng Tao case -ERESTARTSYS: 7560bcbf039SPeng Tao case -EIO: 7570bcbf039SPeng Tao case -ENOSPC: 7580bcbf039SPeng Tao case -EROFS: 7590bcbf039SPeng Tao case -E2BIG: 7600bcbf039SPeng Tao return true; 7610bcbf039SPeng Tao default: 7620bcbf039SPeng Tao return false; 7630bcbf039SPeng Tao } 7640bcbf039SPeng Tao } 765