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; 695c6e5b60STrond Myklebust const char *hostname; /* Hostname of the server */ 705c6e5b60STrond Myklebust const struct sockaddr *addr; /* Address of the server */ 715c6e5b60STrond Myklebust const char *nodename; /* Hostname of the client */ 725c6e5b60STrond Myklebust const char *ip_addr; /* IP address of the client */ 73fcf10398SBryan Schumaker size_t addrlen; 74ab7017a3SBryan Schumaker struct nfs_subversion *nfs_mod; 75fcf10398SBryan Schumaker int proto; 76fcf10398SBryan Schumaker u32 minorversion; 77fcf10398SBryan Schumaker struct net *net; 785c6e5b60STrond Myklebust const struct rpc_timeout *timeparms; 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; 1176b18eaa0S\"Talpey, Thomas\ } nfs_server; 118f9c3a380SEric Paris 119f9c3a380SEric Paris struct security_mnt_opts lsm_opts; 120e50a7a1aSStanislav Kinsbursky struct net *net; 1216b18eaa0S\"Talpey, Thomas\ }; 1226b18eaa0S\"Talpey, Thomas\ 123146ec944SChuck Lever /* mount_clnt.c */ 124c5d120f8SChuck Lever struct nfs_mount_request { 125c5d120f8SChuck Lever struct sockaddr *sap; 126c5d120f8SChuck Lever size_t salen; 127c5d120f8SChuck Lever char *hostname; 128c5d120f8SChuck Lever char *dirpath; 129c5d120f8SChuck Lever u32 version; 130c5d120f8SChuck Lever unsigned short protocol; 131c5d120f8SChuck Lever struct nfs_fh *fh; 13250a737f8SChuck Lever int noresvport; 1338e02f6b9SChuck Lever unsigned int *auth_flav_len; 1348e02f6b9SChuck Lever rpc_authflavor_t *auth_flavs; 1356d59b8d5SStanislav Kinsbursky struct net *net; 136c5d120f8SChuck Lever }; 137c5d120f8SChuck Lever 138fbdefd64SBryan Schumaker struct nfs_mount_info { 139fbdefd64SBryan Schumaker void (*fill_super)(struct super_block *, struct nfs_mount_info *); 140fbdefd64SBryan Schumaker int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); 141fbdefd64SBryan Schumaker struct nfs_parsed_mount_data *parsed; 142fbdefd64SBryan Schumaker struct nfs_clone_mount *cloned; 143fbdefd64SBryan Schumaker struct nfs_fh *mntfh; 144fbdefd64SBryan Schumaker }; 145fbdefd64SBryan Schumaker 146c5d120f8SChuck Lever extern int nfs_mount(struct nfs_mount_request *info); 1470b524123SChuck Lever extern void nfs_umount(const struct nfs_mount_request *info); 148146ec944SChuck Lever 14924c8dbbbSDavid Howells /* client.c */ 150a613fa16STrond Myklebust extern const struct rpc_program nfs_program; 1516b13168bSStanislav Kinsbursky extern void nfs_clients_init(struct net *net); 1526663ee7fSBryan Schumaker extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); 1535c6e5b60STrond Myklebust int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t); 154fcf10398SBryan Schumaker struct nfs_client *nfs_get_client(const struct nfs_client_initdata *, 155fcf10398SBryan Schumaker rpc_authflavor_t); 156fcf10398SBryan Schumaker int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); 157fcf10398SBryan Schumaker void nfs_server_insert_lists(struct nfs_server *); 15832e62b7cSChuck Lever void nfs_server_remove_lists(struct nfs_server *); 159fcf10398SBryan Schumaker void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int); 160fcf10398SBryan Schumaker int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, 161fcf10398SBryan Schumaker rpc_authflavor_t); 162fcf10398SBryan Schumaker struct nfs_server *nfs_alloc_server(void); 163fcf10398SBryan Schumaker void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); 16454ceac45SDavid Howells 16528cd1b3fSStanislav Kinsbursky extern void nfs_cleanup_cb_ident_idr(struct net *); 16624c8dbbbSDavid Howells extern void nfs_put_client(struct nfs_client *); 167cdb7ecedSBryan Schumaker extern void nfs_free_client(struct nfs_client *); 16828cd1b3fSStanislav Kinsbursky extern struct nfs_client *nfs4_find_client_ident(struct net *, int); 169c36fca52SAndy Adamson extern struct nfs_client * 170c7add9a9SStanislav Kinsbursky nfs4_find_client_sessionid(struct net *, const struct sockaddr *, 171459de2edSBryan Schumaker struct nfs4_sessionid *, u32); 1721179acc6SBryan Schumaker extern struct nfs_server *nfs_create_server(struct nfs_mount_info *, 173ab7017a3SBryan Schumaker struct nfs_subversion *); 17491ea40b9S\"Talpey, Thomas\ extern struct nfs_server *nfs4_create_server( 1751179acc6SBryan Schumaker struct nfs_mount_info *, 1761179acc6SBryan Schumaker struct nfs_subversion *); 17754ceac45SDavid Howells extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, 17854ceac45SDavid Howells struct nfs_fh *); 17932e62b7cSChuck Lever extern int nfs4_update_server(struct nfs_server *server, const char *hostname, 180292f503cSTrond Myklebust struct sockaddr *sap, size_t salen, 181292f503cSTrond Myklebust struct net *net); 18254ceac45SDavid Howells extern void nfs_free_server(struct nfs_server *server); 18354ceac45SDavid Howells extern struct nfs_server *nfs_clone_server(struct nfs_server *, 18454ceac45SDavid Howells struct nfs_fh *, 1857e6eb683SBryan Schumaker struct nfs_fattr *, 1867e6eb683SBryan Schumaker rpc_authflavor_t); 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, 19430626f9cSPeng Tao u32 minor_version, 195064172f3SPeng Tao rpc_authflavor_t au_flavor); 1960e20162eSAndy Adamson extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, 1970e20162eSAndy Adamson struct inode *); 1981a04c6e1SPeng Tao extern struct nfs_client *nfs3_set_ds_client(struct nfs_client *mds_clp, 1991a04c6e1SPeng Tao const struct sockaddr *ds_addr, int ds_addrlen, 2001a04c6e1SPeng Tao int ds_proto, unsigned int ds_timeo, 2011a04c6e1SPeng Tao unsigned int ds_retrans, rpc_authflavor_t au_flavor); 2026aaca566SDavid Howells #ifdef CONFIG_PROC_FS 2036aaca566SDavid Howells extern int __init nfs_fs_proc_init(void); 2046aaca566SDavid Howells extern void nfs_fs_proc_exit(void); 20565b38851SEric W. Biederman extern int nfs_fs_proc_net_init(struct net *net); 20665b38851SEric W. Biederman extern void nfs_fs_proc_net_exit(struct net *net); 2076aaca566SDavid Howells #else 20865b38851SEric W. Biederman static inline int nfs_fs_proc_net_init(struct net *net) 20965b38851SEric W. Biederman { 21065b38851SEric W. Biederman return 0; 21165b38851SEric W. Biederman } 21265b38851SEric W. Biederman static inline void nfs_fs_proc_net_exit(struct net *net) 21365b38851SEric W. Biederman { 21465b38851SEric W. Biederman } 2156aaca566SDavid Howells static inline int nfs_fs_proc_init(void) 2166aaca566SDavid Howells { 2176aaca566SDavid Howells return 0; 2186aaca566SDavid Howells } 2196aaca566SDavid Howells static inline void nfs_fs_proc_exit(void) 2206aaca566SDavid Howells { 2216aaca566SDavid Howells } 2226aaca566SDavid Howells #endif 22324c8dbbbSDavid Howells 224f7b422b1SDavid Howells /* callback_xdr.c */ 225f7b422b1SDavid Howells extern struct svc_version nfs4_callback_version1; 22607bccc2dSAlexandros Batsakis extern struct svc_version nfs4_callback_version4; 227f7b422b1SDavid Howells 2284db6e0b7SFred Isaman struct nfs_pageio_descriptor; 229f7b422b1SDavid Howells /* pagelist.c */ 230f7b422b1SDavid Howells extern int __init nfs_init_nfspagecache(void); 231266bee88SDavid Brownell extern void nfs_destroy_nfspagecache(void); 232f7b422b1SDavid Howells extern int __init nfs_init_readpagecache(void); 233266bee88SDavid Brownell extern void nfs_destroy_readpagecache(void); 234f7b422b1SDavid Howells extern int __init nfs_init_writepagecache(void); 235266bee88SDavid Brownell extern void nfs_destroy_writepagecache(void); 236f7b422b1SDavid Howells 237f7b422b1SDavid Howells extern int __init nfs_init_directcache(void); 238266bee88SDavid Brownell extern void nfs_destroy_directcache(void); 2394db6e0b7SFred Isaman extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 2404db6e0b7SFred Isaman struct nfs_pgio_header *hdr, 2414db6e0b7SFred Isaman void (*release)(struct nfs_pgio_header *hdr)); 2424db6e0b7SFred Isaman void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 243210c7c17SBenjamin Coddington int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); 244577b4232STrond Myklebust 24541d8d5b7SAnna Schumaker extern const struct nfs_pageio_ops nfs_pgio_rw_ops; 2461e7f3a48SWeston Andros Adamson struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); 2471e7f3a48SWeston Andros Adamson void nfs_pgio_header_free(struct nfs_pgio_header *); 248d45f60c6SWeston Andros Adamson void nfs_pgio_data_destroy(struct nfs_pgio_header *); 249ef2c488cSAnna Schumaker int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); 25046a5ab47SPeng Tao int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, 25146a5ab47SPeng Tao struct rpc_cred *cred, const struct nfs_rpc_ops *rpc_ops, 25246a5ab47SPeng Tao const struct rpc_call_ops *call_ops, int how, int flags); 253d4581383SWeston Andros Adamson void nfs_free_request(struct nfs_page *req); 25448d635f1SPeng Tao struct nfs_pgio_mirror * 25548d635f1SPeng Tao nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); 25600bfa30aSAnna Schumaker 25747af81f2SPeng Tao static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc) 25847af81f2SPeng Tao { 25947af81f2SPeng Tao WARN_ON_ONCE(desc->pg_mirror_count < 1); 26047af81f2SPeng Tao return desc->pg_mirror_count > 1; 26147af81f2SPeng Tao } 26247af81f2SPeng Tao 263138a2935STrond Myklebust static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, 264138a2935STrond Myklebust const struct nfs_open_context *ctx2) 265138a2935STrond Myklebust { 266138a2935STrond Myklebust return ctx1->cred == ctx2->cred && ctx1->state == ctx2->state; 267138a2935STrond Myklebust } 268138a2935STrond Myklebust 269f7b422b1SDavid Howells /* nfs2xdr.c */ 270f7b422b1SDavid Howells extern struct rpc_procinfo nfs_procedures[]; 271573c4e1eSChuck Lever extern int nfs2_decode_dirent(struct xdr_stream *, 272573c4e1eSChuck Lever struct nfs_entry *, int); 273f7b422b1SDavid Howells 274f7b422b1SDavid Howells /* nfs3xdr.c */ 275f7b422b1SDavid Howells extern struct rpc_procinfo nfs3_procedures[]; 276573c4e1eSChuck Lever extern int nfs3_decode_dirent(struct xdr_stream *, 277573c4e1eSChuck Lever struct nfs_entry *, int); 278f7b422b1SDavid Howells 279f7b422b1SDavid Howells /* nfs4xdr.c */ 28089d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 281573c4e1eSChuck Lever extern int nfs4_decode_dirent(struct xdr_stream *, 282573c4e1eSChuck Lever struct nfs_entry *, int); 2837d4e2747SDavid Howells #endif 2842449ea2eSAlexandros Batsakis #ifdef CONFIG_NFS_V4_1 2852449ea2eSAlexandros Batsakis extern const u32 nfs41_maxread_overhead; 2862449ea2eSAlexandros Batsakis extern const u32 nfs41_maxwrite_overhead; 287f1c097beSAndy Adamson extern const u32 nfs41_maxgetdevinfo_overhead; 2882449ea2eSAlexandros Batsakis #endif 289f7b422b1SDavid Howells 290f7b422b1SDavid Howells /* nfs4proc.c */ 29189d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 292f7b422b1SDavid Howells extern struct rpc_procinfo nfs4_procedures[]; 293d75d5414SAndrew Morton #endif 294f7b422b1SDavid Howells 295694e096fSAnna Schumaker #ifdef CONFIG_NFS_V4_SECURITY_LABEL 296694e096fSAnna Schumaker extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); 297a49c2691SKinglong Mee static inline struct nfs4_label * 298a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 299a49c2691SKinglong Mee { 300a49c2691SKinglong Mee if (!dst || !src) 301a49c2691SKinglong Mee return NULL; 302a49c2691SKinglong Mee 303a49c2691SKinglong Mee if (src->len > NFS4_MAXLABELLEN) 304a49c2691SKinglong Mee return NULL; 305a49c2691SKinglong Mee 306a49c2691SKinglong Mee dst->lfs = src->lfs; 307a49c2691SKinglong Mee dst->pi = src->pi; 308a49c2691SKinglong Mee dst->len = src->len; 309a49c2691SKinglong Mee memcpy(dst->label, src->label, src->len); 310a49c2691SKinglong Mee 311a49c2691SKinglong Mee return dst; 312a49c2691SKinglong Mee } 313694e096fSAnna Schumaker static inline void nfs4_label_free(struct nfs4_label *label) 314694e096fSAnna Schumaker { 315694e096fSAnna Schumaker if (label) { 316694e096fSAnna Schumaker kfree(label->label); 317694e096fSAnna Schumaker kfree(label); 318694e096fSAnna Schumaker } 319694e096fSAnna Schumaker return; 320694e096fSAnna Schumaker } 321fd1defc2STrond Myklebust 322fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 323fd1defc2STrond Myklebust { 324fd1defc2STrond Myklebust if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) 325fd1defc2STrond Myklebust nfsi->cache_validity |= NFS_INO_INVALID_LABEL; 326fd1defc2STrond Myklebust } 327694e096fSAnna Schumaker #else 328694e096fSAnna Schumaker static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } 329694e096fSAnna Schumaker static inline void nfs4_label_free(void *label) {} 330fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 331fd1defc2STrond Myklebust { 332fd1defc2STrond Myklebust } 333a49c2691SKinglong Mee static inline struct nfs4_label * 334a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 335a49c2691SKinglong Mee { 336a49c2691SKinglong Mee return NULL; 337a49c2691SKinglong Mee } 338694e096fSAnna Schumaker #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 339694e096fSAnna Schumaker 3407fe5c398STrond Myklebust /* proc.c */ 3417fe5c398STrond Myklebust void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 3428cab4c39SChuck Lever extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 3435c6e5b60STrond Myklebust const struct nfs_client_initdata *); 3447fe5c398STrond Myklebust 345979df72eSTrond Myklebust /* dir.c */ 346311324adSTrond Myklebust extern void nfs_force_use_readdirplus(struct inode *dir); 3471ab6c499SDave Chinner extern unsigned long nfs_access_cache_count(struct shrinker *shrink, 3481ab6c499SDave Chinner struct shrink_control *sc); 3491ab6c499SDave Chinner extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, 3501495f230SYing Han struct shrink_control *sc); 351597d9289SBryan Schumaker struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 352597d9289SBryan Schumaker int nfs_create(struct inode *, struct dentry *, umode_t, bool); 353597d9289SBryan Schumaker int nfs_mkdir(struct inode *, struct dentry *, umode_t); 354597d9289SBryan Schumaker int nfs_rmdir(struct inode *, struct dentry *); 355597d9289SBryan Schumaker int nfs_unlink(struct inode *, struct dentry *); 356597d9289SBryan Schumaker int nfs_symlink(struct inode *, struct dentry *, const char *); 357597d9289SBryan Schumaker int nfs_link(struct dentry *, struct inode *, struct dentry *); 358597d9289SBryan Schumaker int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); 359597d9289SBryan Schumaker int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); 360979df72eSTrond Myklebust 361ce4ef7c0SBryan Schumaker /* file.c */ 3624ff79bc7SChristoph Hellwig int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 363ce4ef7c0SBryan Schumaker loff_t nfs_file_llseek(struct file *, loff_t, int); 3643aa2d199SAl Viro ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); 365ce4ef7c0SBryan Schumaker ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *, 366ce4ef7c0SBryan Schumaker size_t, unsigned int); 367ce4ef7c0SBryan Schumaker int nfs_file_mmap(struct file *, struct vm_area_struct *); 368edaf4369SAl Viro ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); 369ce4ef7c0SBryan Schumaker int nfs_file_release(struct inode *, struct file *); 370ce4ef7c0SBryan Schumaker int nfs_lock(struct file *, int, struct file_lock *); 371ce4ef7c0SBryan Schumaker int nfs_flock(struct file *, int, struct file_lock *); 372ce4ef7c0SBryan Schumaker int nfs_check_flags(int); 373ce4ef7c0SBryan Schumaker 374f7b422b1SDavid Howells /* inode.c */ 3755746006fSTrond Myklebust extern struct workqueue_struct *nfsiod_workqueue; 376f7b422b1SDavid Howells extern struct inode *nfs_alloc_inode(struct super_block *sb); 377f7b422b1SDavid Howells extern void nfs_destroy_inode(struct inode *); 378a9185b41SChristoph Hellwig extern int nfs_write_inode(struct inode *, struct writeback_control *); 379eed99357STrond Myklebust extern int nfs_drop_inode(struct inode *); 38019d87ca3SBryan Schumaker extern void nfs_clear_inode(struct inode *); 381b57922d9SAl Viro extern void nfs_evict_inode(struct inode *); 382f41f7418STrond Myklebust void nfs_zap_acl_cache(struct inode *inode); 383dfd01f02SPeter Zijlstra extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); 384210c7c17SBenjamin Coddington extern int nfs_wait_atomic_killable(atomic_t *p); 385f7b422b1SDavid Howells 386f7b422b1SDavid Howells /* super.c */ 3876a74490dSBryan Schumaker extern const struct super_operations nfs_sops; 388ab7017a3SBryan Schumaker extern struct file_system_type nfs_fs_type; 38954ceac45SDavid Howells extern struct file_system_type nfs_xdev_fs_type; 39089d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 39154ceac45SDavid Howells extern struct file_system_type nfs4_xdev_fs_type; 39254ceac45SDavid Howells extern struct file_system_type nfs4_referral_fs_type; 393f7b422b1SDavid Howells #endif 3944d4b69ddSWeston Andros Adamson bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); 395ff9099f2SBryan Schumaker struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, 396ff9099f2SBryan Schumaker struct nfs_subversion *); 397fbdefd64SBryan Schumaker void nfs_initialise_sb(struct super_block *); 398fbdefd64SBryan Schumaker int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); 399fbdefd64SBryan Schumaker int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); 400ab7017a3SBryan Schumaker struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *, 401ab7017a3SBryan Schumaker struct nfs_mount_info *, struct nfs_subversion *); 402fbdefd64SBryan Schumaker struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); 403fbdefd64SBryan Schumaker struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, 404fbdefd64SBryan Schumaker const char *, struct nfs_mount_info *); 405fbdefd64SBryan Schumaker void nfs_kill_super(struct super_block *); 406fbdefd64SBryan Schumaker void nfs_fill_super(struct super_block *, struct nfs_mount_info *); 4074ebd9ab3SDominik Hackl 408f7b422b1SDavid Howells extern struct rpc_stat nfs_rpcstat; 4094ebd9ab3SDominik Hackl 410f7b422b1SDavid Howells extern int __init register_nfs_fs(void); 411f7b422b1SDavid Howells extern void __exit unregister_nfs_fs(void); 412ea7c38feSTrond Myklebust extern bool nfs_sb_active(struct super_block *sb); 4131daef0a8STrond Myklebust extern void nfs_sb_deactive(struct super_block *sb); 414f7b422b1SDavid Howells 415f7b422b1SDavid Howells /* namespace.c */ 41697a54868SBen Hutchings #define NFS_PATH_CANONICAL 1 417b514f872SAl Viro extern char *nfs_path(char **p, struct dentry *dentry, 41897a54868SBen Hutchings char *buffer, ssize_t buflen, unsigned flags); 41936d43a43SDavid Howells extern struct vfsmount *nfs_d_automount(struct path *path); 420281cad46SBryan Schumaker struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, 421281cad46SBryan Schumaker struct nfs_fh *, struct nfs_fattr *); 422281cad46SBryan Schumaker struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, 423281cad46SBryan Schumaker struct nfs_fattr *, rpc_authflavor_t); 424f7b422b1SDavid Howells 42554ceac45SDavid Howells /* getroot.c */ 4260d5839adSAl Viro extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, 4270d5839adSAl Viro const char *); 42889d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 4290d5839adSAl Viro extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, 4300d5839adSAl Viro const char *); 43154ceac45SDavid Howells 4325e6b1990STrond Myklebust extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); 4337d4e2747SDavid Howells #endif 434f7b422b1SDavid Howells 435061ae2edSFred Isaman struct nfs_pgio_completion_ops; 436f11c88afSAndy Adamson /* read.c */ 437584aa810SFred Isaman extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 438fab5fc25SChristoph Hellwig struct inode *inode, bool force_mds, 439584aa810SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 440f11c88afSAndy Adamson extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 441493292ddSTrond Myklebust extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 442e885de1aSTrond Myklebust 443fbdefd64SBryan Schumaker /* super.c */ 444fbdefd64SBryan Schumaker void nfs_clone_super(struct super_block *, struct nfs_mount_info *); 445fbdefd64SBryan Schumaker void nfs_umount_begin(struct super_block *); 446fbdefd64SBryan Schumaker int nfs_statfs(struct dentry *, struct kstatfs *); 447fbdefd64SBryan Schumaker int nfs_show_options(struct seq_file *, struct dentry *); 448fbdefd64SBryan Schumaker int nfs_show_devname(struct seq_file *, struct dentry *); 449fbdefd64SBryan Schumaker int nfs_show_path(struct seq_file *, struct dentry *); 450fbdefd64SBryan Schumaker int nfs_show_stats(struct seq_file *, struct dentry *); 451fbdefd64SBryan Schumaker int nfs_remount(struct super_block *sb, int *flags, char *raw_data); 452fbdefd64SBryan Schumaker 453def6ed7eSAndy Adamson /* write.c */ 4541763da12SFred Isaman extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 455a20c93e3SChristoph Hellwig struct inode *inode, int ioflags, bool force_mds, 4561763da12SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 457dce81290STrond Myklebust extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 4580b7c0153SFred Isaman extern void nfs_commit_free(struct nfs_commit_data *p); 459def6ed7eSAndy Adamson extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 4600b7c0153SFred Isaman extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 4610b7c0153SFred Isaman extern int nfs_initiate_commit(struct rpc_clnt *clnt, 4620b7c0153SFred Isaman struct nfs_commit_data *data, 463c36aae9aSPeng Tao const struct nfs_rpc_ops *nfs_ops, 464e0c2b380SFred Isaman const struct rpc_call_ops *call_ops, 4659f0ec176SAndy Adamson int how, int flags); 4660b7c0153SFred Isaman extern void nfs_init_commit(struct nfs_commit_data *data, 467e0c2b380SFred Isaman struct list_head *head, 468f453a54aSFred Isaman struct pnfs_layout_segment *lseg, 469f453a54aSFred Isaman struct nfs_commit_info *cinfo); 4701763da12SFred Isaman int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 4711763da12SFred Isaman struct nfs_commit_info *cinfo, int max); 472ce59515cSAnna Schumaker unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); 4731763da12SFred Isaman int nfs_scan_commit(struct inode *inode, struct list_head *dst, 4741763da12SFred Isaman struct nfs_commit_info *cinfo); 4751763da12SFred Isaman void nfs_mark_request_commit(struct nfs_page *req, 4761763da12SFred Isaman struct pnfs_layout_segment *lseg, 477b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 478b57ff130SWeston Andros Adamson u32 ds_commit_idx); 479c65e6254SWeston Andros Adamson int nfs_write_need_commit(struct nfs_pgio_header *); 480a08a8cd3STrond Myklebust void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); 48167911c8fSAnna Schumaker int nfs_commit_file(struct file *file, struct nfs_write_verifier *verf); 4821763da12SFred Isaman int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 4831763da12SFred Isaman int how, struct nfs_commit_info *cinfo); 484e0c2b380SFred Isaman void nfs_retry_commit(struct list_head *page_list, 485ea2cf228SFred Isaman struct pnfs_layout_segment *lseg, 486b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 487b57ff130SWeston Andros Adamson u32 ds_commit_idx); 4880b7c0153SFred Isaman void nfs_commitdata_release(struct nfs_commit_data *data); 4896272dcc6SAnna Schumaker void nfs_request_add_commit_list(struct nfs_page *req, 490ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 49186d80f97STrond Myklebust void nfs_request_add_commit_list_locked(struct nfs_page *req, 49286d80f97STrond Myklebust struct list_head *dst, 49386d80f97STrond Myklebust struct nfs_commit_info *cinfo); 494ea2cf228SFred Isaman void nfs_request_remove_commit_list(struct nfs_page *req, 495ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 496ea2cf228SFred Isaman void nfs_init_cinfo(struct nfs_commit_info *cinfo, 497ea2cf228SFred Isaman struct inode *inode, 498ea2cf228SFred Isaman struct nfs_direct_req *dreq); 499dc24826bSAndy Adamson int nfs_key_timeout_notify(struct file *filp, struct inode *inode); 500ce52914eSScott Mayhew bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode); 501a7d42ddbSWeston Andros Adamson void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); 502e0c2b380SFred Isaman 503074cc1deSTrond Myklebust #ifdef CONFIG_MIGRATION 504074cc1deSTrond Myklebust extern int nfs_migrate_page(struct address_space *, 505a6bc32b8SMel Gorman struct page *, struct page *, enum migrate_mode); 506074cc1deSTrond Myklebust #else 507074cc1deSTrond Myklebust #define nfs_migrate_page NULL 508074cc1deSTrond Myklebust #endif 509def6ed7eSAndy Adamson 5100e862a40SJeff Layton /* unlink.c */ 5110e862a40SJeff Layton extern struct rpc_task * 5120e862a40SJeff Layton nfs_async_rename(struct inode *old_dir, struct inode *new_dir, 5130e862a40SJeff Layton struct dentry *old_dentry, struct dentry *new_dentry, 5140e862a40SJeff Layton void (*complete)(struct rpc_task *, struct nfs_renamedata *)); 5150e862a40SJeff Layton extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); 5160e862a40SJeff Layton 5171763da12SFred Isaman /* direct.c */ 5181763da12SFred Isaman void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, 5191763da12SFred Isaman struct nfs_direct_req *dreq); 5206296556fSPeng Tao extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); 5211763da12SFred Isaman 522cccef3b9SAndy Adamson /* nfs4proc.c */ 523d45f60c6SWeston Andros Adamson extern void __nfs4_read_done_cb(struct nfs_pgio_header *); 5248cab4c39SChuck Lever extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 5255c6e5b60STrond Myklebust const struct nfs_client_initdata *); 52605f4c350SChuck Lever extern int nfs40_walk_client_list(struct nfs_client *clp, 52705f4c350SChuck Lever struct nfs_client **result, 52805f4c350SChuck Lever struct rpc_cred *cred); 52905f4c350SChuck Lever extern int nfs41_walk_client_list(struct nfs_client *clp, 53005f4c350SChuck Lever struct nfs_client **result, 53105f4c350SChuck Lever struct rpc_cred *cred); 532cccef3b9SAndy Adamson 533ea7c38feSTrond Myklebust static inline struct inode *nfs_igrab_and_active(struct inode *inode) 534ea7c38feSTrond Myklebust { 535ea7c38feSTrond Myklebust inode = igrab(inode); 536ea7c38feSTrond Myklebust if (inode != NULL && !nfs_sb_active(inode->i_sb)) { 537ea7c38feSTrond Myklebust iput(inode); 538ea7c38feSTrond Myklebust inode = NULL; 539ea7c38feSTrond Myklebust } 540ea7c38feSTrond Myklebust return inode; 541ea7c38feSTrond Myklebust } 542ea7c38feSTrond Myklebust 543ea7c38feSTrond Myklebust static inline void nfs_iput_and_deactive(struct inode *inode) 544ea7c38feSTrond Myklebust { 545ea7c38feSTrond Myklebust if (inode != NULL) { 546ea7c38feSTrond Myklebust struct super_block *sb = inode->i_sb; 547ea7c38feSTrond Myklebust 548ea7c38feSTrond Myklebust iput(inode); 549ea7c38feSTrond Myklebust nfs_sb_deactive(sb); 550ea7c38feSTrond Myklebust } 551ea7c38feSTrond Myklebust } 552ea7c38feSTrond Myklebust 553557134a3SAndy Adamson /* 554f7b422b1SDavid Howells * Determine the device name as a string 555f7b422b1SDavid Howells */ 556b514f872SAl Viro static inline char *nfs_devname(struct dentry *dentry, 557f7b422b1SDavid Howells char *buffer, ssize_t buflen) 558f7b422b1SDavid Howells { 559b514f872SAl Viro char *dummy; 56097a54868SBen Hutchings return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); 561f7b422b1SDavid Howells } 562f7b422b1SDavid Howells 563f7b422b1SDavid Howells /* 564f7b422b1SDavid Howells * Determine the actual block size (and log2 thereof) 565f7b422b1SDavid Howells */ 566f7b422b1SDavid Howells static inline 567f7b422b1SDavid Howells unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 568f7b422b1SDavid Howells { 569f7b422b1SDavid Howells /* make sure blocksize is a power of two */ 570f7b422b1SDavid Howells if ((bsize & (bsize - 1)) || nrbitsp) { 571f7b422b1SDavid Howells unsigned char nrbits; 572f7b422b1SDavid Howells 573f7b422b1SDavid Howells for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 574f7b422b1SDavid Howells ; 575f7b422b1SDavid Howells bsize = 1 << nrbits; 576f7b422b1SDavid Howells if (nrbitsp) 577f7b422b1SDavid Howells *nrbitsp = nrbits; 578f7b422b1SDavid Howells } 579f7b422b1SDavid Howells 580f7b422b1SDavid Howells return bsize; 581f7b422b1SDavid Howells } 582f7b422b1SDavid Howells 583f7b422b1SDavid Howells /* 584f7b422b1SDavid Howells * Calculate the number of 512byte blocks used. 585f7b422b1SDavid Howells */ 5869eaa67c6SChuck Lever static inline blkcnt_t nfs_calc_block_size(u64 tsize) 587f7b422b1SDavid Howells { 5889eaa67c6SChuck Lever blkcnt_t used = (tsize + 511) >> 9; 589f7b422b1SDavid Howells return (used > ULONG_MAX) ? ULONG_MAX : used; 590f7b422b1SDavid Howells } 591f7b422b1SDavid Howells 592f7b422b1SDavid Howells /* 593f7b422b1SDavid Howells * Compute and set NFS server blocksize 594f7b422b1SDavid Howells */ 595f7b422b1SDavid Howells static inline 596f7b422b1SDavid Howells unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 597f7b422b1SDavid Howells { 598f7b422b1SDavid Howells if (bsize < NFS_MIN_FILE_IO_SIZE) 599f7b422b1SDavid Howells bsize = NFS_DEF_FILE_IO_SIZE; 600f7b422b1SDavid Howells else if (bsize >= NFS_MAX_FILE_IO_SIZE) 601f7b422b1SDavid Howells bsize = NFS_MAX_FILE_IO_SIZE; 602f7b422b1SDavid Howells 603f7b422b1SDavid Howells return nfs_block_bits(bsize, nrbitsp); 604f7b422b1SDavid Howells } 605f7b422b1SDavid Howells 606f7b422b1SDavid Howells /* 607f7b422b1SDavid Howells * Determine the maximum file size for a superblock 608f7b422b1SDavid Howells */ 609f7b422b1SDavid Howells static inline 610f7b422b1SDavid Howells void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 611f7b422b1SDavid Howells { 612f7b422b1SDavid Howells sb->s_maxbytes = (loff_t)maxfilesize; 613f7b422b1SDavid Howells if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 614f7b422b1SDavid Howells sb->s_maxbytes = MAX_LFS_FILESIZE; 615f7b422b1SDavid Howells } 61649a70f27STrond Myklebust 61749a70f27STrond Myklebust /* 618d15bc38dSTom Haynes * Record the page as unstable and mark its inode as dirty. 619d15bc38dSTom Haynes */ 620d15bc38dSTom Haynes static inline 62186d80f97STrond Myklebust void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) 622d15bc38dSTom Haynes { 62386d80f97STrond Myklebust if (!cinfo->dreq) { 624d15bc38dSTom Haynes struct inode *inode = page_file_mapping(page)->host; 625d15bc38dSTom Haynes 626d15bc38dSTom Haynes inc_zone_page_state(page, NR_UNSTABLE_NFS); 62793f78d88STejun Heo inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE); 628d15bc38dSTom Haynes __mark_inode_dirty(inode, I_DIRTY_DATASYNC); 629d15bc38dSTom Haynes } 63086d80f97STrond Myklebust } 631d15bc38dSTom Haynes 632d15bc38dSTom Haynes /* 63349a70f27STrond Myklebust * Determine the number of bytes of data the page contains 63449a70f27STrond Myklebust */ 63549a70f27STrond Myklebust static inline 63649a70f27STrond Myklebust unsigned int nfs_page_length(struct page *page) 63749a70f27STrond Myklebust { 638d56b4ddfSMel Gorman loff_t i_size = i_size_read(page_file_mapping(page)->host); 63949a70f27STrond Myklebust 64049a70f27STrond Myklebust if (i_size > 0) { 641d56b4ddfSMel Gorman pgoff_t page_index = page_file_index(page); 64209cbfeafSKirill A. Shutemov pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; 643d56b4ddfSMel Gorman if (page_index < end_index) 64409cbfeafSKirill A. Shutemov return PAGE_SIZE; 645d56b4ddfSMel Gorman if (page_index == end_index) 64609cbfeafSKirill A. Shutemov return ((i_size - 1) & ~PAGE_MASK) + 1; 64749a70f27STrond Myklebust } 64849a70f27STrond Myklebust return 0; 64949a70f27STrond Myklebust } 6508d5658c9STrond Myklebust 6518d5658c9STrond Myklebust /* 6520b26a0bfSTrond Myklebust * Convert a umode to a dirent->d_type 6530b26a0bfSTrond Myklebust */ 6540b26a0bfSTrond Myklebust static inline 6550b26a0bfSTrond Myklebust unsigned char nfs_umode_to_dtype(umode_t mode) 6560b26a0bfSTrond Myklebust { 6570b26a0bfSTrond Myklebust return (mode >> 12) & 15; 6580b26a0bfSTrond Myklebust } 6590b26a0bfSTrond Myklebust 6600b26a0bfSTrond Myklebust /* 6618d5658c9STrond Myklebust * Determine the number of pages in an array of length 'len' and 6628d5658c9STrond Myklebust * with a base offset of 'base' 6638d5658c9STrond Myklebust */ 6648d5658c9STrond Myklebust static inline 6658d5658c9STrond Myklebust unsigned int nfs_page_array_len(unsigned int base, size_t len) 6668d5658c9STrond Myklebust { 6678d5658c9STrond Myklebust return ((unsigned long)len + (unsigned long)base + 6688d5658c9STrond Myklebust PAGE_SIZE - 1) >> PAGE_SHIFT; 6698d5658c9STrond Myklebust } 6700110ee15STrond Myklebust 6713a1556e8STrond Myklebust /* 6723a1556e8STrond Myklebust * Convert a struct timespec into a 64-bit change attribute 6733a1556e8STrond Myklebust * 6743a1556e8STrond Myklebust * This does approximately the same thing as timespec_to_ns(), 6753a1556e8STrond Myklebust * but for calculation efficiency, we multiply the seconds by 6763a1556e8STrond Myklebust * 1024*1024*1024. 6773a1556e8STrond Myklebust */ 6783a1556e8STrond Myklebust static inline 6793a1556e8STrond Myklebust u64 nfs_timespec_to_change_attr(const struct timespec *ts) 6803a1556e8STrond Myklebust { 6813a1556e8STrond Myklebust return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 6823a1556e8STrond Myklebust } 6831264a2f0STrond Myklebust 6841264a2f0STrond Myklebust #ifdef CONFIG_CRC32 6851264a2f0STrond Myklebust /** 6861264a2f0STrond Myklebust * nfs_fhandle_hash - calculate the crc32 hash for the filehandle 6871264a2f0STrond Myklebust * @fh - pointer to filehandle 6881264a2f0STrond Myklebust * 6891264a2f0STrond Myklebust * returns a crc32 hash for the filehandle that is compatible with 6901264a2f0STrond Myklebust * the one displayed by "wireshark". 6911264a2f0STrond Myklebust */ 6921264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 6931264a2f0STrond Myklebust { 6941264a2f0STrond Myklebust return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); 6951264a2f0STrond Myklebust } 69648c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) 69748c9579aSOlga Kornievskaia { 69848c9579aSOlga Kornievskaia return ~crc32_le(0xFFFFFFFF, &stateid->other[0], 69948c9579aSOlga Kornievskaia NFS4_STATEID_OTHER_SIZE); 70048c9579aSOlga Kornievskaia } 7011264a2f0STrond Myklebust #else 7021264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7031264a2f0STrond Myklebust { 7041264a2f0STrond Myklebust return 0; 7051264a2f0STrond Myklebust } 70648c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) 70748c9579aSOlga Kornievskaia { 70848c9579aSOlga Kornievskaia return 0; 70948c9579aSOlga Kornievskaia } 7101264a2f0STrond Myklebust #endif 7110bcbf039SPeng Tao 7120bcbf039SPeng Tao static inline bool nfs_error_is_fatal(int err) 7130bcbf039SPeng Tao { 7140bcbf039SPeng Tao switch (err) { 7150bcbf039SPeng Tao case -ERESTARTSYS: 7160bcbf039SPeng Tao case -EIO: 7170bcbf039SPeng Tao case -ENOSPC: 7180bcbf039SPeng Tao case -EROFS: 7190bcbf039SPeng Tao case -E2BIG: 7200bcbf039SPeng Tao return true; 7210bcbf039SPeng Tao default: 7220bcbf039SPeng Tao return false; 7230bcbf039SPeng Tao } 7240bcbf039SPeng Tao } 725