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 61a956bedaSTrond Myklebust #define NFS_UNSPEC_RETRANS (UINT_MAX) 62a956bedaSTrond Myklebust #define NFS_UNSPEC_TIMEO (UINT_MAX) 63a956bedaSTrond Myklebust 644cfd74fcSChuck Lever /* 6556e4ebf8SBryan Schumaker * Maximum number of pages that readdir can use for creating 6656e4ebf8SBryan Schumaker * a vmapped array of pages. 6756e4ebf8SBryan Schumaker */ 6856e4ebf8SBryan Schumaker #define NFS_MAX_READDIR_PAGES 8 6956e4ebf8SBryan Schumaker 70fcf10398SBryan Schumaker struct nfs_client_initdata { 71fcf10398SBryan Schumaker unsigned long init_flags; 725c6e5b60STrond Myklebust const char *hostname; /* Hostname of the server */ 735c6e5b60STrond Myklebust const struct sockaddr *addr; /* Address of the server */ 745c6e5b60STrond Myklebust const char *nodename; /* Hostname of the client */ 755c6e5b60STrond Myklebust const char *ip_addr; /* IP address of the client */ 76fcf10398SBryan Schumaker size_t addrlen; 77ab7017a3SBryan Schumaker struct nfs_subversion *nfs_mod; 78fcf10398SBryan Schumaker int proto; 79fcf10398SBryan Schumaker u32 minorversion; 80fcf10398SBryan Schumaker struct net *net; 815c6e5b60STrond Myklebust const struct rpc_timeout *timeparms; 82fcf10398SBryan Schumaker }; 83fcf10398SBryan Schumaker 8456e4ebf8SBryan Schumaker /* 856b18eaa0S\"Talpey, Thomas\ * In-kernel mount arguments 866b18eaa0S\"Talpey, Thomas\ */ 876b18eaa0S\"Talpey, Thomas\ struct nfs_parsed_mount_data { 886b18eaa0S\"Talpey, Thomas\ int flags; 898cb7f74eSChuck Lever unsigned int rsize, wsize; 908cb7f74eSChuck Lever unsigned int timeo, retrans; 918cb7f74eSChuck Lever unsigned int acregmin, acregmax, 926b18eaa0S\"Talpey, Thomas\ acdirmin, acdirmax; 938cb7f74eSChuck Lever unsigned int namlen; 94b797cac7SDavid Howells unsigned int options; 956b18eaa0S\"Talpey, Thomas\ unsigned int bsize; 96a3f73c27SWeston Andros Adamson struct nfs_auth_info auth_info; 97a3f73c27SWeston Andros Adamson rpc_authflavor_t selected_flavor; 986b18eaa0S\"Talpey, Thomas\ char *client_address; 99764302ccSChuck Lever unsigned int version; 1003fd5be9eSMike Sager unsigned int minorversion; 10108734048SDavid Howells char *fscache_uniq; 102b72e4f42SBryan Schumaker bool need_mount; 1036b18eaa0S\"Talpey, Thomas\ 1046b18eaa0S\"Talpey, Thomas\ struct { 1054c568017SChuck Lever struct sockaddr_storage address; 1064c568017SChuck Lever size_t addrlen; 1076b18eaa0S\"Talpey, Thomas\ char *hostname; 10878fa701fSChuck Lever u32 version; 1094cfd74fcSChuck Lever int port; 11078fa701fSChuck Lever unsigned short protocol; 1116b18eaa0S\"Talpey, Thomas\ } mount_server; 1126b18eaa0S\"Talpey, Thomas\ 1136b18eaa0S\"Talpey, Thomas\ struct { 1144c568017SChuck Lever struct sockaddr_storage address; 1154c568017SChuck Lever size_t addrlen; 1166b18eaa0S\"Talpey, Thomas\ char *hostname; 1176b18eaa0S\"Talpey, Thomas\ char *export_path; 1184cfd74fcSChuck Lever int port; 11978fa701fSChuck Lever unsigned short protocol; 1206b18eaa0S\"Talpey, Thomas\ } nfs_server; 121f9c3a380SEric Paris 122f9c3a380SEric Paris struct security_mnt_opts lsm_opts; 123e50a7a1aSStanislav Kinsbursky struct net *net; 1246b18eaa0S\"Talpey, Thomas\ }; 1256b18eaa0S\"Talpey, Thomas\ 126146ec944SChuck Lever /* mount_clnt.c */ 127c5d120f8SChuck Lever struct nfs_mount_request { 128c5d120f8SChuck Lever struct sockaddr *sap; 129c5d120f8SChuck Lever size_t salen; 130c5d120f8SChuck Lever char *hostname; 131c5d120f8SChuck Lever char *dirpath; 132c5d120f8SChuck Lever u32 version; 133c5d120f8SChuck Lever unsigned short protocol; 134c5d120f8SChuck Lever struct nfs_fh *fh; 13550a737f8SChuck Lever int noresvport; 1368e02f6b9SChuck Lever unsigned int *auth_flav_len; 1378e02f6b9SChuck Lever rpc_authflavor_t *auth_flavs; 1386d59b8d5SStanislav Kinsbursky struct net *net; 139c5d120f8SChuck Lever }; 140c5d120f8SChuck Lever 141fbdefd64SBryan Schumaker struct nfs_mount_info { 142fbdefd64SBryan Schumaker void (*fill_super)(struct super_block *, struct nfs_mount_info *); 143fbdefd64SBryan Schumaker int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); 144fbdefd64SBryan Schumaker struct nfs_parsed_mount_data *parsed; 145fbdefd64SBryan Schumaker struct nfs_clone_mount *cloned; 146fbdefd64SBryan Schumaker struct nfs_fh *mntfh; 147fbdefd64SBryan Schumaker }; 148fbdefd64SBryan Schumaker 149c5d120f8SChuck Lever extern int nfs_mount(struct nfs_mount_request *info); 1500b524123SChuck Lever extern void nfs_umount(const struct nfs_mount_request *info); 151146ec944SChuck Lever 15224c8dbbbSDavid Howells /* client.c */ 153a613fa16STrond Myklebust extern const struct rpc_program nfs_program; 1546b13168bSStanislav Kinsbursky extern void nfs_clients_init(struct net *net); 1556663ee7fSBryan Schumaker extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); 1565c6e5b60STrond Myklebust int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t); 1577d38de3fSAnna Schumaker struct nfs_client *nfs_get_client(const struct nfs_client_initdata *); 158fcf10398SBryan Schumaker int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); 159fcf10398SBryan Schumaker void nfs_server_insert_lists(struct nfs_server *); 16032e62b7cSChuck Lever void nfs_server_remove_lists(struct nfs_server *); 161a956bedaSTrond Myklebust void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans); 162fcf10398SBryan Schumaker int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, 163fcf10398SBryan Schumaker rpc_authflavor_t); 164fcf10398SBryan Schumaker struct nfs_server *nfs_alloc_server(void); 165fcf10398SBryan Schumaker void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); 16654ceac45SDavid Howells 16728cd1b3fSStanislav Kinsbursky extern void nfs_cleanup_cb_ident_idr(struct net *); 16824c8dbbbSDavid Howells extern void nfs_put_client(struct nfs_client *); 169cdb7ecedSBryan Schumaker extern void nfs_free_client(struct nfs_client *); 17028cd1b3fSStanislav Kinsbursky extern struct nfs_client *nfs4_find_client_ident(struct net *, int); 171c36fca52SAndy Adamson extern struct nfs_client * 172c7add9a9SStanislav Kinsbursky nfs4_find_client_sessionid(struct net *, const struct sockaddr *, 173459de2edSBryan Schumaker struct nfs4_sessionid *, u32); 1741179acc6SBryan Schumaker extern struct nfs_server *nfs_create_server(struct nfs_mount_info *, 175ab7017a3SBryan Schumaker struct nfs_subversion *); 17691ea40b9S\"Talpey, Thomas\ extern struct nfs_server *nfs4_create_server( 1771179acc6SBryan Schumaker struct nfs_mount_info *, 1781179acc6SBryan Schumaker struct nfs_subversion *); 17954ceac45SDavid Howells extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, 18054ceac45SDavid Howells struct nfs_fh *); 18132e62b7cSChuck Lever extern int nfs4_update_server(struct nfs_server *server, const char *hostname, 182292f503cSTrond Myklebust struct sockaddr *sap, size_t salen, 183292f503cSTrond Myklebust struct net *net); 18454ceac45SDavid Howells extern void nfs_free_server(struct nfs_server *server); 18554ceac45SDavid Howells extern struct nfs_server *nfs_clone_server(struct nfs_server *, 18654ceac45SDavid Howells struct nfs_fh *, 1877e6eb683SBryan Schumaker struct nfs_fattr *, 1887e6eb683SBryan Schumaker rpc_authflavor_t); 1894697bd5eSTrond Myklebust extern int nfs_wait_client_init_complete(const struct nfs_client *clp); 19076db6d95SAndy Adamson extern void nfs_mark_client_ready(struct nfs_client *clp, int state); 1913fc75f12STigran Mkrtchyan extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, 192d83217c1SAndy Adamson const struct sockaddr *ds_addr, 19398fc685aSAndy Adamson int ds_addrlen, int ds_proto, 19498fc685aSAndy Adamson unsigned int ds_timeo, 195064172f3SPeng Tao unsigned int ds_retrans, 1967d38de3fSAnna Schumaker u32 minor_version); 1970e20162eSAndy Adamson extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, 1980e20162eSAndy Adamson struct inode *); 199b224f7cbSTigran Mkrtchyan extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, 2001a04c6e1SPeng Tao const struct sockaddr *ds_addr, int ds_addrlen, 2011a04c6e1SPeng Tao int ds_proto, unsigned int ds_timeo, 2027d38de3fSAnna Schumaker unsigned int ds_retrans); 2036aaca566SDavid Howells #ifdef CONFIG_PROC_FS 2046aaca566SDavid Howells extern int __init nfs_fs_proc_init(void); 2056aaca566SDavid Howells extern void nfs_fs_proc_exit(void); 20665b38851SEric W. Biederman extern int nfs_fs_proc_net_init(struct net *net); 20765b38851SEric W. Biederman extern void nfs_fs_proc_net_exit(struct net *net); 2086aaca566SDavid Howells #else 20965b38851SEric W. Biederman static inline int nfs_fs_proc_net_init(struct net *net) 21065b38851SEric W. Biederman { 21165b38851SEric W. Biederman return 0; 21265b38851SEric W. Biederman } 21365b38851SEric W. Biederman static inline void nfs_fs_proc_net_exit(struct net *net) 21465b38851SEric W. Biederman { 21565b38851SEric W. Biederman } 2166aaca566SDavid Howells static inline int nfs_fs_proc_init(void) 2176aaca566SDavid Howells { 2186aaca566SDavid Howells return 0; 2196aaca566SDavid Howells } 2206aaca566SDavid Howells static inline void nfs_fs_proc_exit(void) 2216aaca566SDavid Howells { 2226aaca566SDavid Howells } 2236aaca566SDavid Howells #endif 22424c8dbbbSDavid Howells 225f7b422b1SDavid Howells /* callback_xdr.c */ 226f7b422b1SDavid Howells extern struct svc_version nfs4_callback_version1; 22707bccc2dSAlexandros Batsakis extern struct svc_version nfs4_callback_version4; 228f7b422b1SDavid Howells 2294db6e0b7SFred Isaman struct nfs_pageio_descriptor; 230f7b422b1SDavid Howells /* pagelist.c */ 231f7b422b1SDavid Howells extern int __init nfs_init_nfspagecache(void); 232266bee88SDavid Brownell extern void nfs_destroy_nfspagecache(void); 233f7b422b1SDavid Howells extern int __init nfs_init_readpagecache(void); 234266bee88SDavid Brownell extern void nfs_destroy_readpagecache(void); 235f7b422b1SDavid Howells extern int __init nfs_init_writepagecache(void); 236266bee88SDavid Brownell extern void nfs_destroy_writepagecache(void); 237f7b422b1SDavid Howells 238f7b422b1SDavid Howells extern int __init nfs_init_directcache(void); 239266bee88SDavid Brownell extern void nfs_destroy_directcache(void); 2404db6e0b7SFred Isaman extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 2414db6e0b7SFred Isaman struct nfs_pgio_header *hdr, 2424db6e0b7SFred Isaman void (*release)(struct nfs_pgio_header *hdr)); 2434db6e0b7SFred Isaman void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 244210c7c17SBenjamin Coddington int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); 245577b4232STrond Myklebust 24641d8d5b7SAnna Schumaker extern const struct nfs_pageio_ops nfs_pgio_rw_ops; 2471e7f3a48SWeston Andros Adamson struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); 2481e7f3a48SWeston Andros Adamson void nfs_pgio_header_free(struct nfs_pgio_header *); 249d45f60c6SWeston Andros Adamson void nfs_pgio_data_destroy(struct nfs_pgio_header *); 250ef2c488cSAnna Schumaker int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); 25146a5ab47SPeng Tao int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, 25246a5ab47SPeng Tao struct rpc_cred *cred, const struct nfs_rpc_ops *rpc_ops, 25346a5ab47SPeng Tao const struct rpc_call_ops *call_ops, int how, int flags); 254d4581383SWeston Andros Adamson void nfs_free_request(struct nfs_page *req); 25548d635f1SPeng Tao struct nfs_pgio_mirror * 25648d635f1SPeng Tao nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); 25700bfa30aSAnna Schumaker 25847af81f2SPeng Tao static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc) 25947af81f2SPeng Tao { 26047af81f2SPeng Tao WARN_ON_ONCE(desc->pg_mirror_count < 1); 26147af81f2SPeng Tao return desc->pg_mirror_count > 1; 26247af81f2SPeng Tao } 26347af81f2SPeng Tao 264138a2935STrond Myklebust static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, 265138a2935STrond Myklebust const struct nfs_open_context *ctx2) 266138a2935STrond Myklebust { 267138a2935STrond Myklebust return ctx1->cred == ctx2->cred && ctx1->state == ctx2->state; 268138a2935STrond Myklebust } 269138a2935STrond Myklebust 270f7b422b1SDavid Howells /* nfs2xdr.c */ 271f7b422b1SDavid Howells extern struct rpc_procinfo nfs_procedures[]; 272573c4e1eSChuck Lever extern int nfs2_decode_dirent(struct xdr_stream *, 273573c4e1eSChuck Lever struct nfs_entry *, int); 274f7b422b1SDavid Howells 275f7b422b1SDavid Howells /* nfs3xdr.c */ 276f7b422b1SDavid Howells extern struct rpc_procinfo nfs3_procedures[]; 277573c4e1eSChuck Lever extern int nfs3_decode_dirent(struct xdr_stream *, 278573c4e1eSChuck Lever struct nfs_entry *, int); 279f7b422b1SDavid Howells 280f7b422b1SDavid Howells /* nfs4xdr.c */ 28189d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 282573c4e1eSChuck Lever extern int nfs4_decode_dirent(struct xdr_stream *, 283573c4e1eSChuck Lever struct nfs_entry *, int); 2847d4e2747SDavid Howells #endif 2852449ea2eSAlexandros Batsakis #ifdef CONFIG_NFS_V4_1 2862449ea2eSAlexandros Batsakis extern const u32 nfs41_maxread_overhead; 2872449ea2eSAlexandros Batsakis extern const u32 nfs41_maxwrite_overhead; 288f1c097beSAndy Adamson extern const u32 nfs41_maxgetdevinfo_overhead; 2892449ea2eSAlexandros Batsakis #endif 290f7b422b1SDavid Howells 291f7b422b1SDavid Howells /* nfs4proc.c */ 29289d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 293f7b422b1SDavid Howells extern struct rpc_procinfo nfs4_procedures[]; 294d75d5414SAndrew Morton #endif 295f7b422b1SDavid Howells 296694e096fSAnna Schumaker #ifdef CONFIG_NFS_V4_SECURITY_LABEL 297694e096fSAnna Schumaker extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); 298a49c2691SKinglong Mee static inline struct nfs4_label * 299a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 300a49c2691SKinglong Mee { 301a49c2691SKinglong Mee if (!dst || !src) 302a49c2691SKinglong Mee return NULL; 303a49c2691SKinglong Mee 304a49c2691SKinglong Mee if (src->len > NFS4_MAXLABELLEN) 305a49c2691SKinglong Mee return NULL; 306a49c2691SKinglong Mee 307a49c2691SKinglong Mee dst->lfs = src->lfs; 308a49c2691SKinglong Mee dst->pi = src->pi; 309a49c2691SKinglong Mee dst->len = src->len; 310a49c2691SKinglong Mee memcpy(dst->label, src->label, src->len); 311a49c2691SKinglong Mee 312a49c2691SKinglong Mee return dst; 313a49c2691SKinglong Mee } 314694e096fSAnna Schumaker static inline void nfs4_label_free(struct nfs4_label *label) 315694e096fSAnna Schumaker { 316694e096fSAnna Schumaker if (label) { 317694e096fSAnna Schumaker kfree(label->label); 318694e096fSAnna Schumaker kfree(label); 319694e096fSAnna Schumaker } 320694e096fSAnna Schumaker return; 321694e096fSAnna Schumaker } 322fd1defc2STrond Myklebust 323fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 324fd1defc2STrond Myklebust { 325fd1defc2STrond Myklebust if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) 326fd1defc2STrond Myklebust nfsi->cache_validity |= NFS_INO_INVALID_LABEL; 327fd1defc2STrond Myklebust } 328694e096fSAnna Schumaker #else 329694e096fSAnna Schumaker static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } 330694e096fSAnna Schumaker static inline void nfs4_label_free(void *label) {} 331fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 332fd1defc2STrond Myklebust { 333fd1defc2STrond Myklebust } 334a49c2691SKinglong Mee static inline struct nfs4_label * 335a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 336a49c2691SKinglong Mee { 337a49c2691SKinglong Mee return NULL; 338a49c2691SKinglong Mee } 339694e096fSAnna Schumaker #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 340694e096fSAnna Schumaker 3417fe5c398STrond Myklebust /* proc.c */ 3427fe5c398STrond Myklebust void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 3438cab4c39SChuck Lever extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 3445c6e5b60STrond Myklebust const struct nfs_client_initdata *); 3457fe5c398STrond Myklebust 346979df72eSTrond Myklebust /* dir.c */ 3471bcf4c5cSTrond Myklebust extern void nfs_advise_use_readdirplus(struct inode *dir); 348311324adSTrond Myklebust extern void nfs_force_use_readdirplus(struct inode *dir); 3491ab6c499SDave Chinner extern unsigned long nfs_access_cache_count(struct shrinker *shrink, 3501ab6c499SDave Chinner struct shrink_control *sc); 3511ab6c499SDave Chinner extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, 3521495f230SYing Han struct shrink_control *sc); 353597d9289SBryan Schumaker struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 354597d9289SBryan Schumaker int nfs_create(struct inode *, struct dentry *, umode_t, bool); 355597d9289SBryan Schumaker int nfs_mkdir(struct inode *, struct dentry *, umode_t); 356597d9289SBryan Schumaker int nfs_rmdir(struct inode *, struct dentry *); 357597d9289SBryan Schumaker int nfs_unlink(struct inode *, struct dentry *); 358597d9289SBryan Schumaker int nfs_symlink(struct inode *, struct dentry *, const char *); 359597d9289SBryan Schumaker int nfs_link(struct dentry *, struct inode *, struct dentry *); 360597d9289SBryan Schumaker int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); 3611cd66c93SMiklos Szeredi int nfs_rename(struct inode *, struct dentry *, 3621cd66c93SMiklos Szeredi struct inode *, struct dentry *, unsigned int); 363979df72eSTrond Myklebust 364ce4ef7c0SBryan Schumaker /* file.c */ 3654ff79bc7SChristoph Hellwig int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 366ce4ef7c0SBryan Schumaker loff_t nfs_file_llseek(struct file *, loff_t, int); 3673aa2d199SAl Viro ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); 368ce4ef7c0SBryan Schumaker int nfs_file_mmap(struct file *, struct vm_area_struct *); 369edaf4369SAl Viro ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); 370ce4ef7c0SBryan Schumaker int nfs_file_release(struct inode *, struct file *); 371ce4ef7c0SBryan Schumaker int nfs_lock(struct file *, int, struct file_lock *); 372ce4ef7c0SBryan Schumaker int nfs_flock(struct file *, int, struct file_lock *); 373ce4ef7c0SBryan Schumaker int nfs_check_flags(int); 374ce4ef7c0SBryan Schumaker 375f7b422b1SDavid Howells /* inode.c */ 3765746006fSTrond Myklebust extern struct workqueue_struct *nfsiod_workqueue; 377f7b422b1SDavid Howells extern struct inode *nfs_alloc_inode(struct super_block *sb); 378f7b422b1SDavid Howells extern void nfs_destroy_inode(struct inode *); 379a9185b41SChristoph Hellwig extern int nfs_write_inode(struct inode *, struct writeback_control *); 380eed99357STrond Myklebust extern int nfs_drop_inode(struct inode *); 38119d87ca3SBryan Schumaker extern void nfs_clear_inode(struct inode *); 382b57922d9SAl Viro extern void nfs_evict_inode(struct inode *); 383f41f7418STrond Myklebust void nfs_zap_acl_cache(struct inode *inode); 38461540bf6STrond Myklebust extern bool nfs_check_cache_invalid(struct inode *, unsigned long); 385dfd01f02SPeter Zijlstra extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); 386210c7c17SBenjamin Coddington extern int nfs_wait_atomic_killable(atomic_t *p); 387f7b422b1SDavid Howells 388f7b422b1SDavid Howells /* super.c */ 3896a74490dSBryan Schumaker extern const struct super_operations nfs_sops; 390ab7017a3SBryan Schumaker extern struct file_system_type nfs_fs_type; 39154ceac45SDavid Howells extern struct file_system_type nfs_xdev_fs_type; 39289d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 39354ceac45SDavid Howells extern struct file_system_type nfs4_xdev_fs_type; 39454ceac45SDavid Howells extern struct file_system_type nfs4_referral_fs_type; 395f7b422b1SDavid Howells #endif 3964d4b69ddSWeston Andros Adamson bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); 397ff9099f2SBryan Schumaker struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, 398ff9099f2SBryan Schumaker struct nfs_subversion *); 399fbdefd64SBryan Schumaker void nfs_initialise_sb(struct super_block *); 400fbdefd64SBryan Schumaker int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); 401fbdefd64SBryan Schumaker int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); 402ab7017a3SBryan Schumaker struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *, 403ab7017a3SBryan Schumaker struct nfs_mount_info *, struct nfs_subversion *); 404fbdefd64SBryan Schumaker struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); 405fbdefd64SBryan Schumaker struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, 406fbdefd64SBryan Schumaker const char *, struct nfs_mount_info *); 407fbdefd64SBryan Schumaker void nfs_kill_super(struct super_block *); 408fbdefd64SBryan Schumaker void nfs_fill_super(struct super_block *, struct nfs_mount_info *); 4094ebd9ab3SDominik Hackl 410f7b422b1SDavid Howells extern struct rpc_stat nfs_rpcstat; 4114ebd9ab3SDominik Hackl 412f7b422b1SDavid Howells extern int __init register_nfs_fs(void); 413f7b422b1SDavid Howells extern void __exit unregister_nfs_fs(void); 414ea7c38feSTrond Myklebust extern bool nfs_sb_active(struct super_block *sb); 4151daef0a8STrond Myklebust extern void nfs_sb_deactive(struct super_block *sb); 416f7b422b1SDavid Howells 417a5864c99STrond Myklebust /* io.c */ 418a5864c99STrond Myklebust extern void nfs_start_io_read(struct inode *inode); 419a5864c99STrond Myklebust extern void nfs_end_io_read(struct inode *inode); 420a5864c99STrond Myklebust extern void nfs_start_io_write(struct inode *inode); 421a5864c99STrond Myklebust extern void nfs_end_io_write(struct inode *inode); 422a5864c99STrond Myklebust extern void nfs_start_io_direct(struct inode *inode); 423a5864c99STrond Myklebust extern void nfs_end_io_direct(struct inode *inode); 424a5864c99STrond Myklebust 425651b0e70STrond Myklebust static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) 426651b0e70STrond Myklebust { 427651b0e70STrond Myklebust return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0; 428651b0e70STrond Myklebust } 429651b0e70STrond Myklebust 430f7b422b1SDavid Howells /* namespace.c */ 43197a54868SBen Hutchings #define NFS_PATH_CANONICAL 1 432b514f872SAl Viro extern char *nfs_path(char **p, struct dentry *dentry, 43397a54868SBen Hutchings char *buffer, ssize_t buflen, unsigned flags); 43436d43a43SDavid Howells extern struct vfsmount *nfs_d_automount(struct path *path); 435281cad46SBryan Schumaker struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, 436281cad46SBryan Schumaker struct nfs_fh *, struct nfs_fattr *); 437281cad46SBryan Schumaker struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, 438281cad46SBryan Schumaker struct nfs_fattr *, rpc_authflavor_t); 439f7b422b1SDavid Howells 44054ceac45SDavid Howells /* getroot.c */ 4410d5839adSAl Viro extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, 4420d5839adSAl Viro const char *); 44389d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 4440d5839adSAl Viro extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, 4450d5839adSAl Viro const char *); 44654ceac45SDavid Howells 4475e6b1990STrond Myklebust extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); 4487d4e2747SDavid Howells #endif 449f7b422b1SDavid Howells 450061ae2edSFred Isaman struct nfs_pgio_completion_ops; 451f11c88afSAndy Adamson /* read.c */ 452584aa810SFred Isaman extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 453fab5fc25SChristoph Hellwig struct inode *inode, bool force_mds, 454584aa810SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 455f11c88afSAndy Adamson extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 456493292ddSTrond Myklebust extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 457e885de1aSTrond Myklebust 458fbdefd64SBryan Schumaker /* super.c */ 459fbdefd64SBryan Schumaker void nfs_clone_super(struct super_block *, struct nfs_mount_info *); 460fbdefd64SBryan Schumaker void nfs_umount_begin(struct super_block *); 461fbdefd64SBryan Schumaker int nfs_statfs(struct dentry *, struct kstatfs *); 462fbdefd64SBryan Schumaker int nfs_show_options(struct seq_file *, struct dentry *); 463fbdefd64SBryan Schumaker int nfs_show_devname(struct seq_file *, struct dentry *); 464fbdefd64SBryan Schumaker int nfs_show_path(struct seq_file *, struct dentry *); 465fbdefd64SBryan Schumaker int nfs_show_stats(struct seq_file *, struct dentry *); 466fbdefd64SBryan Schumaker int nfs_remount(struct super_block *sb, int *flags, char *raw_data); 467fbdefd64SBryan Schumaker 468def6ed7eSAndy Adamson /* write.c */ 4691763da12SFred Isaman extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 470a20c93e3SChristoph Hellwig struct inode *inode, int ioflags, bool force_mds, 4711763da12SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 472dce81290STrond Myklebust extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 4730b7c0153SFred Isaman extern void nfs_commit_free(struct nfs_commit_data *p); 474def6ed7eSAndy Adamson extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 4750b7c0153SFred Isaman extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 4760b7c0153SFred Isaman extern int nfs_initiate_commit(struct rpc_clnt *clnt, 4770b7c0153SFred Isaman struct nfs_commit_data *data, 478c36aae9aSPeng Tao const struct nfs_rpc_ops *nfs_ops, 479e0c2b380SFred Isaman const struct rpc_call_ops *call_ops, 4809f0ec176SAndy Adamson int how, int flags); 4810b7c0153SFred Isaman extern void nfs_init_commit(struct nfs_commit_data *data, 482e0c2b380SFred Isaman struct list_head *head, 483f453a54aSFred Isaman struct pnfs_layout_segment *lseg, 484f453a54aSFred Isaman struct nfs_commit_info *cinfo); 4851763da12SFred Isaman int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 4861763da12SFred Isaman struct nfs_commit_info *cinfo, int max); 487ce59515cSAnna Schumaker unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); 4881763da12SFred Isaman int nfs_scan_commit(struct inode *inode, struct list_head *dst, 4891763da12SFred Isaman struct nfs_commit_info *cinfo); 4901763da12SFred Isaman void nfs_mark_request_commit(struct nfs_page *req, 4911763da12SFred Isaman struct pnfs_layout_segment *lseg, 492b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 493b57ff130SWeston Andros Adamson u32 ds_commit_idx); 494c65e6254SWeston Andros Adamson int nfs_write_need_commit(struct nfs_pgio_header *); 495a08a8cd3STrond Myklebust void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); 49667911c8fSAnna Schumaker int nfs_commit_file(struct file *file, struct nfs_write_verifier *verf); 4971763da12SFred Isaman int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 4981763da12SFred Isaman int how, struct nfs_commit_info *cinfo); 499e0c2b380SFred Isaman void nfs_retry_commit(struct list_head *page_list, 500ea2cf228SFred Isaman struct pnfs_layout_segment *lseg, 501b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 502b57ff130SWeston Andros Adamson u32 ds_commit_idx); 5030b7c0153SFred Isaman void nfs_commitdata_release(struct nfs_commit_data *data); 5046272dcc6SAnna Schumaker void nfs_request_add_commit_list(struct nfs_page *req, 505ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 50686d80f97STrond Myklebust void nfs_request_add_commit_list_locked(struct nfs_page *req, 50786d80f97STrond Myklebust struct list_head *dst, 50886d80f97STrond Myklebust struct nfs_commit_info *cinfo); 509ea2cf228SFred Isaman void nfs_request_remove_commit_list(struct nfs_page *req, 510ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 511ea2cf228SFred Isaman void nfs_init_cinfo(struct nfs_commit_info *cinfo, 512ea2cf228SFred Isaman struct inode *inode, 513ea2cf228SFred Isaman struct nfs_direct_req *dreq); 514dc24826bSAndy Adamson int nfs_key_timeout_notify(struct file *filp, struct inode *inode); 515ce52914eSScott Mayhew bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode); 516a7d42ddbSWeston Andros Adamson void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); 517e0c2b380SFred Isaman 518837bb1d7STrond Myklebust int nfs_filemap_write_and_wait_range(struct address_space *mapping, 519837bb1d7STrond Myklebust loff_t lstart, loff_t lend); 520837bb1d7STrond Myklebust 521a5314a74STrond Myklebust #ifdef CONFIG_NFS_V4_1 522a5314a74STrond Myklebust static inline 523a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 524a5314a74STrond Myklebust { 525a5314a74STrond Myklebust int i; 526a5314a74STrond Myklebust 527a5314a74STrond Myklebust for (i = 0; i < cinfo->nbuckets; i++) 528a5314a74STrond Myklebust cinfo->buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; 529a5314a74STrond Myklebust } 530a5314a74STrond Myklebust #else 531a5314a74STrond Myklebust static inline 532a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 533a5314a74STrond Myklebust { 534a5314a74STrond Myklebust } 535a5314a74STrond Myklebust #endif 536a5314a74STrond Myklebust 537074cc1deSTrond Myklebust #ifdef CONFIG_MIGRATION 538074cc1deSTrond Myklebust extern int nfs_migrate_page(struct address_space *, 539a6bc32b8SMel Gorman struct page *, struct page *, enum migrate_mode); 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 */ 5628cab4c39SChuck Lever extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 5635c6e5b60STrond Myklebust const struct nfs_client_initdata *); 56405f4c350SChuck Lever extern int nfs40_walk_client_list(struct nfs_client *clp, 56505f4c350SChuck Lever struct nfs_client **result, 56605f4c350SChuck Lever struct rpc_cred *cred); 56705f4c350SChuck Lever extern int nfs41_walk_client_list(struct nfs_client *clp, 56805f4c350SChuck Lever struct nfs_client **result, 56905f4c350SChuck Lever struct rpc_cred *cred); 57004fa2c6bSAndy Adamson extern int nfs4_test_session_trunk(struct rpc_clnt *, 57104fa2c6bSAndy Adamson struct rpc_xprt *, 57204fa2c6bSAndy Adamson void *); 573cccef3b9SAndy Adamson 574ea7c38feSTrond Myklebust static inline struct inode *nfs_igrab_and_active(struct inode *inode) 575ea7c38feSTrond Myklebust { 576ea7c38feSTrond Myklebust inode = igrab(inode); 577ea7c38feSTrond Myklebust if (inode != NULL && !nfs_sb_active(inode->i_sb)) { 578ea7c38feSTrond Myklebust iput(inode); 579ea7c38feSTrond Myklebust inode = NULL; 580ea7c38feSTrond Myklebust } 581ea7c38feSTrond Myklebust return inode; 582ea7c38feSTrond Myklebust } 583ea7c38feSTrond Myklebust 584ea7c38feSTrond Myklebust static inline void nfs_iput_and_deactive(struct inode *inode) 585ea7c38feSTrond Myklebust { 586ea7c38feSTrond Myklebust if (inode != NULL) { 587ea7c38feSTrond Myklebust struct super_block *sb = inode->i_sb; 588ea7c38feSTrond Myklebust 589ea7c38feSTrond Myklebust iput(inode); 590ea7c38feSTrond Myklebust nfs_sb_deactive(sb); 591ea7c38feSTrond Myklebust } 592ea7c38feSTrond Myklebust } 593ea7c38feSTrond Myklebust 594557134a3SAndy Adamson /* 595f7b422b1SDavid Howells * Determine the device name as a string 596f7b422b1SDavid Howells */ 597b514f872SAl Viro static inline char *nfs_devname(struct dentry *dentry, 598f7b422b1SDavid Howells char *buffer, ssize_t buflen) 599f7b422b1SDavid Howells { 600b514f872SAl Viro char *dummy; 60197a54868SBen Hutchings return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); 602f7b422b1SDavid Howells } 603f7b422b1SDavid Howells 604f7b422b1SDavid Howells /* 605f7b422b1SDavid Howells * Determine the actual block size (and log2 thereof) 606f7b422b1SDavid Howells */ 607f7b422b1SDavid Howells static inline 608f7b422b1SDavid Howells unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 609f7b422b1SDavid Howells { 610f7b422b1SDavid Howells /* make sure blocksize is a power of two */ 611f7b422b1SDavid Howells if ((bsize & (bsize - 1)) || nrbitsp) { 612f7b422b1SDavid Howells unsigned char nrbits; 613f7b422b1SDavid Howells 614f7b422b1SDavid Howells for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 615f7b422b1SDavid Howells ; 616f7b422b1SDavid Howells bsize = 1 << nrbits; 617f7b422b1SDavid Howells if (nrbitsp) 618f7b422b1SDavid Howells *nrbitsp = nrbits; 619f7b422b1SDavid Howells } 620f7b422b1SDavid Howells 621f7b422b1SDavid Howells return bsize; 622f7b422b1SDavid Howells } 623f7b422b1SDavid Howells 624f7b422b1SDavid Howells /* 625f7b422b1SDavid Howells * Calculate the number of 512byte blocks used. 626f7b422b1SDavid Howells */ 6279eaa67c6SChuck Lever static inline blkcnt_t nfs_calc_block_size(u64 tsize) 628f7b422b1SDavid Howells { 6299eaa67c6SChuck Lever blkcnt_t used = (tsize + 511) >> 9; 630f7b422b1SDavid Howells return (used > ULONG_MAX) ? ULONG_MAX : used; 631f7b422b1SDavid Howells } 632f7b422b1SDavid Howells 633f7b422b1SDavid Howells /* 634f7b422b1SDavid Howells * Compute and set NFS server blocksize 635f7b422b1SDavid Howells */ 636f7b422b1SDavid Howells static inline 637f7b422b1SDavid Howells unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 638f7b422b1SDavid Howells { 639f7b422b1SDavid Howells if (bsize < NFS_MIN_FILE_IO_SIZE) 640f7b422b1SDavid Howells bsize = NFS_DEF_FILE_IO_SIZE; 641f7b422b1SDavid Howells else if (bsize >= NFS_MAX_FILE_IO_SIZE) 642f7b422b1SDavid Howells bsize = NFS_MAX_FILE_IO_SIZE; 643f7b422b1SDavid Howells 644f7b422b1SDavid Howells return nfs_block_bits(bsize, nrbitsp); 645f7b422b1SDavid Howells } 646f7b422b1SDavid Howells 647f7b422b1SDavid Howells /* 648f7b422b1SDavid Howells * Determine the maximum file size for a superblock 649f7b422b1SDavid Howells */ 650f7b422b1SDavid Howells static inline 651f7b422b1SDavid Howells void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 652f7b422b1SDavid Howells { 653f7b422b1SDavid Howells sb->s_maxbytes = (loff_t)maxfilesize; 654f7b422b1SDavid Howells if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 655f7b422b1SDavid Howells sb->s_maxbytes = MAX_LFS_FILESIZE; 656f7b422b1SDavid Howells } 65749a70f27STrond Myklebust 65849a70f27STrond Myklebust /* 659d15bc38dSTom Haynes * Record the page as unstable and mark its inode as dirty. 660d15bc38dSTom Haynes */ 661d15bc38dSTom Haynes static inline 66286d80f97STrond Myklebust void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) 663d15bc38dSTom Haynes { 66486d80f97STrond Myklebust if (!cinfo->dreq) { 665d15bc38dSTom Haynes struct inode *inode = page_file_mapping(page)->host; 666d15bc38dSTom Haynes 66711fb9989SMel Gorman inc_node_page_state(page, NR_UNSTABLE_NFS); 66893f78d88STejun Heo inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE); 669d15bc38dSTom Haynes __mark_inode_dirty(inode, I_DIRTY_DATASYNC); 670d15bc38dSTom Haynes } 67186d80f97STrond Myklebust } 672d15bc38dSTom Haynes 673d15bc38dSTom Haynes /* 67449a70f27STrond Myklebust * Determine the number of bytes of data the page contains 67549a70f27STrond Myklebust */ 67649a70f27STrond Myklebust static inline 67749a70f27STrond Myklebust unsigned int nfs_page_length(struct page *page) 67849a70f27STrond Myklebust { 679d56b4ddfSMel Gorman loff_t i_size = i_size_read(page_file_mapping(page)->host); 68049a70f27STrond Myklebust 68149a70f27STrond Myklebust if (i_size > 0) { 6828cd79788SHuang Ying pgoff_t index = page_index(page); 68309cbfeafSKirill A. Shutemov pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; 6848cd79788SHuang Ying if (index < end_index) 68509cbfeafSKirill A. Shutemov return PAGE_SIZE; 6868cd79788SHuang Ying if (index == end_index) 68709cbfeafSKirill A. Shutemov return ((i_size - 1) & ~PAGE_MASK) + 1; 68849a70f27STrond Myklebust } 68949a70f27STrond Myklebust return 0; 69049a70f27STrond Myklebust } 6918d5658c9STrond Myklebust 6928d5658c9STrond Myklebust /* 6930b26a0bfSTrond Myklebust * Convert a umode to a dirent->d_type 6940b26a0bfSTrond Myklebust */ 6950b26a0bfSTrond Myklebust static inline 6960b26a0bfSTrond Myklebust unsigned char nfs_umode_to_dtype(umode_t mode) 6970b26a0bfSTrond Myklebust { 6980b26a0bfSTrond Myklebust return (mode >> 12) & 15; 6990b26a0bfSTrond Myklebust } 7000b26a0bfSTrond Myklebust 7010b26a0bfSTrond Myklebust /* 7028d5658c9STrond Myklebust * Determine the number of pages in an array of length 'len' and 7038d5658c9STrond Myklebust * with a base offset of 'base' 7048d5658c9STrond Myklebust */ 7058d5658c9STrond Myklebust static inline 7068d5658c9STrond Myklebust unsigned int nfs_page_array_len(unsigned int base, size_t len) 7078d5658c9STrond Myklebust { 7088d5658c9STrond Myklebust return ((unsigned long)len + (unsigned long)base + 7098d5658c9STrond Myklebust PAGE_SIZE - 1) >> PAGE_SHIFT; 7108d5658c9STrond Myklebust } 7110110ee15STrond Myklebust 7123a1556e8STrond Myklebust /* 7133a1556e8STrond Myklebust * Convert a struct timespec into a 64-bit change attribute 7143a1556e8STrond Myklebust * 7153a1556e8STrond Myklebust * This does approximately the same thing as timespec_to_ns(), 7163a1556e8STrond Myklebust * but for calculation efficiency, we multiply the seconds by 7173a1556e8STrond Myklebust * 1024*1024*1024. 7183a1556e8STrond Myklebust */ 7193a1556e8STrond Myklebust static inline 7203a1556e8STrond Myklebust u64 nfs_timespec_to_change_attr(const struct timespec *ts) 7213a1556e8STrond Myklebust { 7223a1556e8STrond Myklebust return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 7233a1556e8STrond Myklebust } 7241264a2f0STrond Myklebust 7251264a2f0STrond Myklebust #ifdef CONFIG_CRC32 7261264a2f0STrond Myklebust /** 7271264a2f0STrond Myklebust * nfs_fhandle_hash - calculate the crc32 hash for the filehandle 7281264a2f0STrond Myklebust * @fh - pointer to filehandle 7291264a2f0STrond Myklebust * 7301264a2f0STrond Myklebust * returns a crc32 hash for the filehandle that is compatible with 7311264a2f0STrond Myklebust * the one displayed by "wireshark". 7321264a2f0STrond Myklebust */ 7331264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7341264a2f0STrond Myklebust { 7351264a2f0STrond Myklebust return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); 7361264a2f0STrond Myklebust } 73748c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) 73848c9579aSOlga Kornievskaia { 73948c9579aSOlga Kornievskaia return ~crc32_le(0xFFFFFFFF, &stateid->other[0], 74048c9579aSOlga Kornievskaia NFS4_STATEID_OTHER_SIZE); 74148c9579aSOlga Kornievskaia } 7421264a2f0STrond Myklebust #else 7431264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7441264a2f0STrond Myklebust { 7451264a2f0STrond Myklebust return 0; 7461264a2f0STrond Myklebust } 74748c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) 74848c9579aSOlga Kornievskaia { 74948c9579aSOlga Kornievskaia return 0; 75048c9579aSOlga Kornievskaia } 7511264a2f0STrond Myklebust #endif 7520bcbf039SPeng Tao 7530bcbf039SPeng Tao static inline bool nfs_error_is_fatal(int err) 7540bcbf039SPeng Tao { 7550bcbf039SPeng Tao switch (err) { 7560bcbf039SPeng Tao case -ERESTARTSYS: 7570bcbf039SPeng Tao case -EIO: 7580bcbf039SPeng Tao case -ENOSPC: 7590bcbf039SPeng Tao case -EROFS: 7600bcbf039SPeng Tao case -E2BIG: 7610bcbf039SPeng Tao return true; 7620bcbf039SPeng Tao default: 7630bcbf039SPeng Tao return false; 7640bcbf039SPeng Tao } 7650bcbf039SPeng Tao } 766