1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2f7b422b1SDavid Howells /* 3f7b422b1SDavid Howells * NFS internal definitions 4f7b422b1SDavid Howells */ 5f7b422b1SDavid Howells 6eedc020eSAndy Adamson #include "nfs4_fs.h" 7f7b422b1SDavid Howells #include <linux/mount.h> 8f9c3a380SEric Paris #include <linux/security.h> 91264a2f0STrond Myklebust #include <linux/crc32.h> 109954bf92SDavid Howells #include <linux/sunrpc/addr.h> 1147af81f2SPeng Tao #include <linux/nfs_page.h> 125dd43ce2SIngo Molnar #include <linux/wait_bit.h> 13f7b422b1SDavid Howells 141751e8a6SLinus Torvalds #define NFS_MS_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS) 1508734048SDavid Howells 1620fa1902SPeng Tao extern const struct export_operations nfs_export_ops; 1720fa1902SPeng Tao 1854ceac45SDavid Howells struct nfs_string; 1954ceac45SDavid Howells 207ebb9315SBryan Schumaker static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) 217ebb9315SBryan Schumaker { 227ebb9315SBryan Schumaker if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid)) 237ebb9315SBryan Schumaker fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT; 247ebb9315SBryan Schumaker } 257ebb9315SBryan Schumaker 26533eb461SAndy Adamson static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) 27533eb461SAndy Adamson { 28533eb461SAndy Adamson if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) || 29533eb461SAndy Adamson (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) && 30533eb461SAndy Adamson ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0))) 31533eb461SAndy Adamson return 0; 32533eb461SAndy Adamson return 1; 33533eb461SAndy Adamson } 34533eb461SAndy Adamson 35f7b422b1SDavid Howells struct nfs_clone_mount { 36f7b422b1SDavid Howells const struct super_block *sb; 37f7b422b1SDavid Howells const struct dentry *dentry; 38f7b422b1SDavid Howells char *hostname; 39f7b422b1SDavid Howells char *mnt_path; 406677d095SChuck Lever struct sockaddr *addr; 416677d095SChuck Lever size_t addrlen; 42f7b422b1SDavid Howells rpc_authflavor_t authflavor; 43f7b422b1SDavid Howells }; 44f7b422b1SDavid Howells 456b18eaa0S\"Talpey, Thomas\ /* 46a14017dbSChuck Lever * Note: RFC 1813 doesn't limit the number of auth flavors that 47a14017dbSChuck Lever * a server can return, so make something up. 48a14017dbSChuck Lever */ 49a14017dbSChuck Lever #define NFS_MAX_SECFLAVORS (12) 50a14017dbSChuck Lever 51a14017dbSChuck Lever /* 524cfd74fcSChuck Lever * Value used if the user did not specify a port value. 534cfd74fcSChuck Lever */ 544cfd74fcSChuck Lever #define NFS_UNSPEC_PORT (-1) 554cfd74fcSChuck Lever 56a956bedaSTrond Myklebust #define NFS_UNSPEC_RETRANS (UINT_MAX) 57a956bedaSTrond Myklebust #define NFS_UNSPEC_TIMEO (UINT_MAX) 58a956bedaSTrond Myklebust 594cfd74fcSChuck Lever /* 6056e4ebf8SBryan Schumaker * Maximum number of pages that readdir can use for creating 6156e4ebf8SBryan Schumaker * a vmapped array of pages. 6256e4ebf8SBryan Schumaker */ 63db531db9SMax Kellermann #define NFS_MAX_READDIR_PAGES 8 6456e4ebf8SBryan Schumaker 65fcf10398SBryan Schumaker struct nfs_client_initdata { 66fcf10398SBryan Schumaker unsigned long init_flags; 675c6e5b60STrond Myklebust const char *hostname; /* Hostname of the server */ 685c6e5b60STrond Myklebust const struct sockaddr *addr; /* Address of the server */ 695c6e5b60STrond Myklebust const char *nodename; /* Hostname of the client */ 705c6e5b60STrond Myklebust const char *ip_addr; /* IP address of the client */ 71fcf10398SBryan Schumaker size_t addrlen; 72ab7017a3SBryan Schumaker struct nfs_subversion *nfs_mod; 73fcf10398SBryan Schumaker int proto; 74fcf10398SBryan Schumaker u32 minorversion; 756619079dSTrond Myklebust unsigned int nconnect; 76fcf10398SBryan Schumaker struct net *net; 775c6e5b60STrond Myklebust const struct rpc_timeout *timeparms; 781a58e8a0STrond Myklebust const struct cred *cred; 79fcf10398SBryan Schumaker }; 80fcf10398SBryan Schumaker 8156e4ebf8SBryan Schumaker /* 826b18eaa0S\"Talpey, Thomas\ * In-kernel mount arguments 836b18eaa0S\"Talpey, Thomas\ */ 845eb005caSDavid Howells struct nfs_fs_context { 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; 99f8ee01e3SDavid Howells unsigned short protofamily; 100f8ee01e3SDavid Howells unsigned short mountfamily; 101b72e4f42SBryan Schumaker bool need_mount; 102f8ee01e3SDavid Howells bool sloppy; 1036b18eaa0S\"Talpey, Thomas\ 1046b18eaa0S\"Talpey, Thomas\ struct { 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; 12028cc5cd8STrond Myklebust unsigned short nconnect; 1216b18eaa0S\"Talpey, Thomas\ } nfs_server; 122f9c3a380SEric Paris 123204cc0ccSAl Viro void *lsm_opts; 124e50a7a1aSStanislav Kinsbursky struct net *net; 12548be8a66SDavid Howells 12648be8a66SDavid Howells char buf[32]; /* Parse buffer */ 1276b18eaa0S\"Talpey, Thomas\ }; 1286b18eaa0S\"Talpey, Thomas\ 129146ec944SChuck Lever /* mount_clnt.c */ 130c5d120f8SChuck Lever struct nfs_mount_request { 131c5d120f8SChuck Lever struct sockaddr *sap; 132c5d120f8SChuck Lever size_t salen; 133c5d120f8SChuck Lever char *hostname; 134c5d120f8SChuck Lever char *dirpath; 135c5d120f8SChuck Lever u32 version; 136c5d120f8SChuck Lever unsigned short protocol; 137c5d120f8SChuck Lever struct nfs_fh *fh; 13850a737f8SChuck Lever int noresvport; 1398e02f6b9SChuck Lever unsigned int *auth_flav_len; 1408e02f6b9SChuck Lever rpc_authflavor_t *auth_flavs; 1416d59b8d5SStanislav Kinsbursky struct net *net; 142c5d120f8SChuck Lever }; 143c5d120f8SChuck Lever 144fbdefd64SBryan Schumaker struct nfs_mount_info { 145ab88dca3SAl Viro unsigned int inherited_bsize; 1465eb005caSDavid Howells struct nfs_fs_context *ctx; 147fbdefd64SBryan Schumaker struct nfs_clone_mount *cloned; 148d0b779d4SAl Viro struct nfs_server *server; 149fbdefd64SBryan Schumaker struct nfs_fh *mntfh; 1506a3f7a39SAl Viro struct nfs_subversion *nfs_mod; 151fbdefd64SBryan Schumaker }; 152fbdefd64SBryan Schumaker 153c5d120f8SChuck Lever extern int nfs_mount(struct nfs_mount_request *info); 1540b524123SChuck Lever extern void nfs_umount(const struct nfs_mount_request *info); 155146ec944SChuck Lever 15624c8dbbbSDavid Howells /* client.c */ 157a613fa16STrond Myklebust extern const struct rpc_program nfs_program; 1586b13168bSStanislav Kinsbursky extern void nfs_clients_init(struct net *net); 15910b7a70cSTrond Myklebust extern void nfs_clients_exit(struct net *net); 1606663ee7fSBryan Schumaker extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); 1615c6e5b60STrond Myklebust int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t); 1627d38de3fSAnna Schumaker struct nfs_client *nfs_get_client(const struct nfs_client_initdata *); 163fcf10398SBryan Schumaker int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); 164fcf10398SBryan Schumaker void nfs_server_insert_lists(struct nfs_server *); 16532e62b7cSChuck Lever void nfs_server_remove_lists(struct nfs_server *); 166a956bedaSTrond Myklebust void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans); 167fcf10398SBryan Schumaker int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, 168fcf10398SBryan Schumaker rpc_authflavor_t); 169fcf10398SBryan Schumaker struct nfs_server *nfs_alloc_server(void); 170fcf10398SBryan Schumaker void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); 17154ceac45SDavid Howells 17224c8dbbbSDavid Howells extern void nfs_put_client(struct nfs_client *); 173cdb7ecedSBryan Schumaker extern void nfs_free_client(struct nfs_client *); 17428cd1b3fSStanislav Kinsbursky extern struct nfs_client *nfs4_find_client_ident(struct net *, int); 175c36fca52SAndy Adamson extern struct nfs_client * 176c7add9a9SStanislav Kinsbursky nfs4_find_client_sessionid(struct net *, const struct sockaddr *, 177459de2edSBryan Schumaker struct nfs4_sessionid *, u32); 1780c38f213SAl Viro extern struct nfs_server *nfs_create_server(struct nfs_mount_info *); 1790c38f213SAl Viro extern struct nfs_server *nfs4_create_server(struct nfs_mount_info *); 18054ceac45SDavid Howells extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, 18154ceac45SDavid Howells struct nfs_fh *); 18232e62b7cSChuck Lever extern int nfs4_update_server(struct nfs_server *server, const char *hostname, 183292f503cSTrond Myklebust struct sockaddr *sap, size_t salen, 184292f503cSTrond Myklebust struct net *net); 18554ceac45SDavid Howells extern void nfs_free_server(struct nfs_server *server); 18654ceac45SDavid Howells extern struct nfs_server *nfs_clone_server(struct nfs_server *, 18754ceac45SDavid Howells struct nfs_fh *, 1887e6eb683SBryan Schumaker struct nfs_fattr *, 1897e6eb683SBryan Schumaker rpc_authflavor_t); 190a33e4b03SWeston Andros Adamson extern bool nfs_client_init_is_complete(const struct nfs_client *clp); 191a33e4b03SWeston Andros Adamson extern int nfs_client_init_status(const struct nfs_client *clp); 1924697bd5eSTrond Myklebust extern int nfs_wait_client_init_complete(const struct nfs_client *clp); 19376db6d95SAndy Adamson extern void nfs_mark_client_ready(struct nfs_client *clp, int state); 1943fc75f12STigran Mkrtchyan extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, 195d83217c1SAndy Adamson const struct sockaddr *ds_addr, 19698fc685aSAndy Adamson int ds_addrlen, int ds_proto, 19798fc685aSAndy Adamson unsigned int ds_timeo, 198064172f3SPeng Tao unsigned int ds_retrans, 1997d38de3fSAnna Schumaker u32 minor_version); 2000e20162eSAndy Adamson extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, 2010e20162eSAndy Adamson struct inode *); 202b224f7cbSTigran Mkrtchyan extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, 2031a04c6e1SPeng Tao const struct sockaddr *ds_addr, int ds_addrlen, 2041a04c6e1SPeng Tao int ds_proto, unsigned int ds_timeo, 2057d38de3fSAnna Schumaker unsigned int ds_retrans); 2066aaca566SDavid Howells #ifdef CONFIG_PROC_FS 2076aaca566SDavid Howells extern int __init nfs_fs_proc_init(void); 2086aaca566SDavid Howells extern void nfs_fs_proc_exit(void); 20965b38851SEric W. Biederman extern int nfs_fs_proc_net_init(struct net *net); 21065b38851SEric W. Biederman extern void nfs_fs_proc_net_exit(struct net *net); 2116aaca566SDavid Howells #else 21265b38851SEric W. Biederman static inline int nfs_fs_proc_net_init(struct net *net) 21365b38851SEric W. Biederman { 21465b38851SEric W. Biederman return 0; 21565b38851SEric W. Biederman } 21665b38851SEric W. Biederman static inline void nfs_fs_proc_net_exit(struct net *net) 21765b38851SEric W. Biederman { 21865b38851SEric W. Biederman } 2196aaca566SDavid Howells static inline int nfs_fs_proc_init(void) 2206aaca566SDavid Howells { 2216aaca566SDavid Howells return 0; 2226aaca566SDavid Howells } 2236aaca566SDavid Howells static inline void nfs_fs_proc_exit(void) 2246aaca566SDavid Howells { 2256aaca566SDavid Howells } 2266aaca566SDavid Howells #endif 22724c8dbbbSDavid Howells 228f7b422b1SDavid Howells /* callback_xdr.c */ 229e9679189SChristoph Hellwig extern const struct svc_version nfs4_callback_version1; 230e9679189SChristoph Hellwig extern const struct svc_version nfs4_callback_version4; 231f7b422b1SDavid Howells 2324db6e0b7SFred Isaman struct nfs_pageio_descriptor; 2339954bf92SDavid Howells 2349954bf92SDavid Howells /* mount.c */ 2359954bf92SDavid Howells #define NFS_TEXT_DATA 1 2369954bf92SDavid Howells 2375eb005caSDavid Howells extern struct nfs_fs_context *nfs_alloc_parsed_mount_data(void); 2385eb005caSDavid Howells extern void nfs_free_parsed_mount_data(struct nfs_fs_context *ctx); 2395eb005caSDavid Howells extern int nfs_parse_mount_options(char *raw, struct nfs_fs_context *ctx); 2409954bf92SDavid Howells extern int nfs_validate_mount_data(struct file_system_type *fs_type, 2419954bf92SDavid Howells void *options, 2425eb005caSDavid Howells struct nfs_fs_context *ctx, 2439954bf92SDavid Howells struct nfs_fh *mntfh, 2449954bf92SDavid Howells const char *dev_name); 2459954bf92SDavid Howells extern int nfs_validate_text_mount_data(void *options, 2465eb005caSDavid Howells struct nfs_fs_context *ctx, 2479954bf92SDavid Howells const char *dev_name); 2489954bf92SDavid Howells 249f7b422b1SDavid Howells /* pagelist.c */ 250f7b422b1SDavid Howells extern int __init nfs_init_nfspagecache(void); 251266bee88SDavid Brownell extern void nfs_destroy_nfspagecache(void); 252f7b422b1SDavid Howells extern int __init nfs_init_readpagecache(void); 253266bee88SDavid Brownell extern void nfs_destroy_readpagecache(void); 254f7b422b1SDavid Howells extern int __init nfs_init_writepagecache(void); 255266bee88SDavid Brownell extern void nfs_destroy_writepagecache(void); 256f7b422b1SDavid Howells 257f7b422b1SDavid Howells extern int __init nfs_init_directcache(void); 258266bee88SDavid Brownell extern void nfs_destroy_directcache(void); 2594db6e0b7SFred Isaman extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 2604db6e0b7SFred Isaman struct nfs_pgio_header *hdr, 2614db6e0b7SFred Isaman void (*release)(struct nfs_pgio_header *hdr)); 2624db6e0b7SFred Isaman void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 263210c7c17SBenjamin Coddington int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); 264577b4232STrond Myklebust 26541d8d5b7SAnna Schumaker extern const struct nfs_pageio_ops nfs_pgio_rw_ops; 2661e7f3a48SWeston Andros Adamson struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); 2671e7f3a48SWeston Andros Adamson void nfs_pgio_header_free(struct nfs_pgio_header *); 268ef2c488cSAnna Schumaker int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); 26946a5ab47SPeng Tao int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, 270a52458b4SNeilBrown const struct cred *cred, const struct nfs_rpc_ops *rpc_ops, 27146a5ab47SPeng Tao const struct rpc_call_ops *call_ops, int how, int flags); 272d4581383SWeston Andros Adamson void nfs_free_request(struct nfs_page *req); 27348d635f1SPeng Tao struct nfs_pgio_mirror * 27448d635f1SPeng Tao nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); 27500bfa30aSAnna Schumaker 27647af81f2SPeng Tao static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc) 27747af81f2SPeng Tao { 27847af81f2SPeng Tao WARN_ON_ONCE(desc->pg_mirror_count < 1); 27947af81f2SPeng Tao return desc->pg_mirror_count > 1; 28047af81f2SPeng Tao } 28147af81f2SPeng Tao 282138a2935STrond Myklebust static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, 283138a2935STrond Myklebust const struct nfs_open_context *ctx2) 284138a2935STrond Myklebust { 285a52458b4SNeilBrown return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state; 286138a2935STrond Myklebust } 287138a2935STrond Myklebust 288f7b422b1SDavid Howells /* nfs2xdr.c */ 289499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs_procedures[]; 290573c4e1eSChuck Lever extern int nfs2_decode_dirent(struct xdr_stream *, 291a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 292f7b422b1SDavid Howells 293f7b422b1SDavid Howells /* nfs3xdr.c */ 294499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs3_procedures[]; 295573c4e1eSChuck Lever extern int nfs3_decode_dirent(struct xdr_stream *, 296a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 297f7b422b1SDavid Howells 298f7b422b1SDavid Howells /* nfs4xdr.c */ 29989d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 300573c4e1eSChuck Lever extern int nfs4_decode_dirent(struct xdr_stream *, 301a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 3027d4e2747SDavid Howells #endif 3032449ea2eSAlexandros Batsakis #ifdef CONFIG_NFS_V4_1 3042449ea2eSAlexandros Batsakis extern const u32 nfs41_maxread_overhead; 3052449ea2eSAlexandros Batsakis extern const u32 nfs41_maxwrite_overhead; 306f1c097beSAndy Adamson extern const u32 nfs41_maxgetdevinfo_overhead; 3072449ea2eSAlexandros Batsakis #endif 308f7b422b1SDavid Howells 309f7b422b1SDavid Howells /* nfs4proc.c */ 31089d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 311499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs4_procedures[]; 312d75d5414SAndrew Morton #endif 313f7b422b1SDavid Howells 314694e096fSAnna Schumaker #ifdef CONFIG_NFS_V4_SECURITY_LABEL 315694e096fSAnna Schumaker extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); 316a49c2691SKinglong Mee static inline struct nfs4_label * 317a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 318a49c2691SKinglong Mee { 319a49c2691SKinglong Mee if (!dst || !src) 320a49c2691SKinglong Mee return NULL; 321a49c2691SKinglong Mee 322a49c2691SKinglong Mee if (src->len > NFS4_MAXLABELLEN) 323a49c2691SKinglong Mee return NULL; 324a49c2691SKinglong Mee 325a49c2691SKinglong Mee dst->lfs = src->lfs; 326a49c2691SKinglong Mee dst->pi = src->pi; 327a49c2691SKinglong Mee dst->len = src->len; 328a49c2691SKinglong Mee memcpy(dst->label, src->label, src->len); 329a49c2691SKinglong Mee 330a49c2691SKinglong Mee return dst; 331a49c2691SKinglong Mee } 332694e096fSAnna Schumaker static inline void nfs4_label_free(struct nfs4_label *label) 333694e096fSAnna Schumaker { 334694e096fSAnna Schumaker if (label) { 335694e096fSAnna Schumaker kfree(label->label); 336694e096fSAnna Schumaker kfree(label); 337694e096fSAnna Schumaker } 338694e096fSAnna Schumaker return; 339694e096fSAnna Schumaker } 340fd1defc2STrond Myklebust 341fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 342fd1defc2STrond Myklebust { 343fd1defc2STrond Myklebust if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) 344fd1defc2STrond Myklebust nfsi->cache_validity |= NFS_INO_INVALID_LABEL; 345fd1defc2STrond Myklebust } 346694e096fSAnna Schumaker #else 347694e096fSAnna Schumaker static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } 348694e096fSAnna Schumaker static inline void nfs4_label_free(void *label) {} 349fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 350fd1defc2STrond Myklebust { 351fd1defc2STrond Myklebust } 352a49c2691SKinglong Mee static inline struct nfs4_label * 353a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 354a49c2691SKinglong Mee { 355a49c2691SKinglong Mee return NULL; 356a49c2691SKinglong Mee } 357694e096fSAnna Schumaker #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 358694e096fSAnna Schumaker 3597fe5c398STrond Myklebust /* proc.c */ 3607fe5c398STrond Myklebust void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 3618cab4c39SChuck Lever extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 3625c6e5b60STrond Myklebust const struct nfs_client_initdata *); 3637fe5c398STrond Myklebust 364979df72eSTrond Myklebust /* dir.c */ 3651bcf4c5cSTrond Myklebust extern void nfs_advise_use_readdirplus(struct inode *dir); 366311324adSTrond Myklebust extern void nfs_force_use_readdirplus(struct inode *dir); 3671ab6c499SDave Chinner extern unsigned long nfs_access_cache_count(struct shrinker *shrink, 3681ab6c499SDave Chinner struct shrink_control *sc); 3691ab6c499SDave Chinner extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, 3701495f230SYing Han struct shrink_control *sc); 371597d9289SBryan Schumaker struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 372597d9289SBryan Schumaker int nfs_create(struct inode *, struct dentry *, umode_t, bool); 373597d9289SBryan Schumaker int nfs_mkdir(struct inode *, struct dentry *, umode_t); 374597d9289SBryan Schumaker int nfs_rmdir(struct inode *, struct dentry *); 375597d9289SBryan Schumaker int nfs_unlink(struct inode *, struct dentry *); 376597d9289SBryan Schumaker int nfs_symlink(struct inode *, struct dentry *, const char *); 377597d9289SBryan Schumaker int nfs_link(struct dentry *, struct inode *, struct dentry *); 378597d9289SBryan Schumaker int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); 3791cd66c93SMiklos Szeredi int nfs_rename(struct inode *, struct dentry *, 3801cd66c93SMiklos Szeredi struct inode *, struct dentry *, unsigned int); 381979df72eSTrond Myklebust 382ce4ef7c0SBryan Schumaker /* file.c */ 3834ff79bc7SChristoph Hellwig int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 384ce4ef7c0SBryan Schumaker loff_t nfs_file_llseek(struct file *, loff_t, int); 3853aa2d199SAl Viro ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); 386ce4ef7c0SBryan Schumaker int nfs_file_mmap(struct file *, struct vm_area_struct *); 387edaf4369SAl Viro ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); 388ce4ef7c0SBryan Schumaker int nfs_file_release(struct inode *, struct file *); 389ce4ef7c0SBryan Schumaker int nfs_lock(struct file *, int, struct file_lock *); 390ce4ef7c0SBryan Schumaker int nfs_flock(struct file *, int, struct file_lock *); 391ce4ef7c0SBryan Schumaker int nfs_check_flags(int); 392ce4ef7c0SBryan Schumaker 393f7b422b1SDavid Howells /* inode.c */ 3945746006fSTrond Myklebust extern struct workqueue_struct *nfsiod_workqueue; 395f7b422b1SDavid Howells extern struct inode *nfs_alloc_inode(struct super_block *sb); 396ca1a199eSAl Viro extern void nfs_free_inode(struct inode *); 397a9185b41SChristoph Hellwig extern int nfs_write_inode(struct inode *, struct writeback_control *); 398eed99357STrond Myklebust extern int nfs_drop_inode(struct inode *); 39919d87ca3SBryan Schumaker extern void nfs_clear_inode(struct inode *); 400b57922d9SAl Viro extern void nfs_evict_inode(struct inode *); 401f41f7418STrond Myklebust void nfs_zap_acl_cache(struct inode *inode); 40261540bf6STrond Myklebust extern bool nfs_check_cache_invalid(struct inode *, unsigned long); 403dfd01f02SPeter Zijlstra extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); 4045e4def20SDavid Howells extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode); 405f7b422b1SDavid Howells 406f7b422b1SDavid Howells /* super.c */ 4076a74490dSBryan Schumaker extern const struct super_operations nfs_sops; 408ab7017a3SBryan Schumaker extern struct file_system_type nfs_fs_type; 40982eaed2bSAl Viro extern struct file_system_type nfs_prepared_fs_type; 41089d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 41154ceac45SDavid Howells extern struct file_system_type nfs4_referral_fs_type; 412f7b422b1SDavid Howells #endif 4134d4b69ddSWeston Andros Adamson bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); 414a55d3297SAl Viro struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *); 415fbdefd64SBryan Schumaker struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); 416fbdefd64SBryan Schumaker void nfs_kill_super(struct super_block *); 4174ebd9ab3SDominik Hackl 418f7b422b1SDavid Howells extern struct rpc_stat nfs_rpcstat; 4194ebd9ab3SDominik Hackl 420f7b422b1SDavid Howells extern int __init register_nfs_fs(void); 421f7b422b1SDavid Howells extern void __exit unregister_nfs_fs(void); 422ea7c38feSTrond Myklebust extern bool nfs_sb_active(struct super_block *sb); 4231daef0a8STrond Myklebust extern void nfs_sb_deactive(struct super_block *sb); 424f7b422b1SDavid Howells 425a5864c99STrond Myklebust /* io.c */ 426a5864c99STrond Myklebust extern void nfs_start_io_read(struct inode *inode); 427a5864c99STrond Myklebust extern void nfs_end_io_read(struct inode *inode); 428a5864c99STrond Myklebust extern void nfs_start_io_write(struct inode *inode); 429a5864c99STrond Myklebust extern void nfs_end_io_write(struct inode *inode); 430a5864c99STrond Myklebust extern void nfs_start_io_direct(struct inode *inode); 431a5864c99STrond Myklebust extern void nfs_end_io_direct(struct inode *inode); 432a5864c99STrond Myklebust 433651b0e70STrond Myklebust static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) 434651b0e70STrond Myklebust { 435651b0e70STrond Myklebust return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0; 436651b0e70STrond Myklebust } 437651b0e70STrond Myklebust 438f7b422b1SDavid Howells /* namespace.c */ 43997a54868SBen Hutchings #define NFS_PATH_CANONICAL 1 440b514f872SAl Viro extern char *nfs_path(char **p, struct dentry *dentry, 44197a54868SBen Hutchings char *buffer, ssize_t buflen, unsigned flags); 44236d43a43SDavid Howells extern struct vfsmount *nfs_d_automount(struct path *path); 443281cad46SBryan Schumaker struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, 444281cad46SBryan Schumaker struct nfs_fh *, struct nfs_fattr *); 445281cad46SBryan Schumaker struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, 446281cad46SBryan Schumaker struct nfs_fattr *, rpc_authflavor_t); 447f7b422b1SDavid Howells 44854ceac45SDavid Howells /* getroot.c */ 4490d5839adSAl Viro extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, 4500d5839adSAl Viro const char *); 45189d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 4520d5839adSAl Viro extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, 4530d5839adSAl Viro const char *); 45454ceac45SDavid Howells 4555e6b1990STrond Myklebust extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); 4567d4e2747SDavid Howells #endif 457f7b422b1SDavid Howells 458061ae2edSFred Isaman struct nfs_pgio_completion_ops; 459f11c88afSAndy Adamson /* read.c */ 460584aa810SFred Isaman extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 461fab5fc25SChristoph Hellwig struct inode *inode, bool force_mds, 462584aa810SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 463f11c88afSAndy Adamson extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 464493292ddSTrond Myklebust extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 465e885de1aSTrond Myklebust 466fbdefd64SBryan Schumaker /* super.c */ 467fbdefd64SBryan Schumaker void nfs_umount_begin(struct super_block *); 468fbdefd64SBryan Schumaker int nfs_statfs(struct dentry *, struct kstatfs *); 469fbdefd64SBryan Schumaker int nfs_show_options(struct seq_file *, struct dentry *); 470fbdefd64SBryan Schumaker int nfs_show_devname(struct seq_file *, struct dentry *); 471fbdefd64SBryan Schumaker int nfs_show_path(struct seq_file *, struct dentry *); 472fbdefd64SBryan Schumaker int nfs_show_stats(struct seq_file *, struct dentry *); 473fbdefd64SBryan Schumaker int nfs_remount(struct super_block *sb, int *flags, char *raw_data); 474fbdefd64SBryan Schumaker 475def6ed7eSAndy Adamson /* write.c */ 4761763da12SFred Isaman extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 477a20c93e3SChristoph Hellwig struct inode *inode, int ioflags, bool force_mds, 4781763da12SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 479dce81290STrond Myklebust extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 4800b7c0153SFred Isaman extern void nfs_commit_free(struct nfs_commit_data *p); 481def6ed7eSAndy Adamson extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 4820b7c0153SFred Isaman extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 4830b7c0153SFred Isaman extern int nfs_initiate_commit(struct rpc_clnt *clnt, 4840b7c0153SFred Isaman struct nfs_commit_data *data, 485c36aae9aSPeng Tao const struct nfs_rpc_ops *nfs_ops, 486e0c2b380SFred Isaman const struct rpc_call_ops *call_ops, 4879f0ec176SAndy Adamson int how, int flags); 4880b7c0153SFred Isaman extern void nfs_init_commit(struct nfs_commit_data *data, 489e0c2b380SFred Isaman struct list_head *head, 490f453a54aSFred Isaman struct pnfs_layout_segment *lseg, 491f453a54aSFred Isaman struct nfs_commit_info *cinfo); 4921763da12SFred Isaman int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 4931763da12SFred Isaman struct nfs_commit_info *cinfo, int max); 494ce59515cSAnna Schumaker unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); 4951763da12SFred Isaman int nfs_scan_commit(struct inode *inode, struct list_head *dst, 4961763da12SFred Isaman struct nfs_commit_info *cinfo); 4971763da12SFred Isaman void nfs_mark_request_commit(struct nfs_page *req, 4981763da12SFred Isaman struct pnfs_layout_segment *lseg, 499b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 500b57ff130SWeston Andros Adamson u32 ds_commit_idx); 501c65e6254SWeston Andros Adamson int nfs_write_need_commit(struct nfs_pgio_header *); 502a08a8cd3STrond Myklebust void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); 5031763da12SFred Isaman int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 5041763da12SFred Isaman int how, struct nfs_commit_info *cinfo); 505e0c2b380SFred Isaman void nfs_retry_commit(struct list_head *page_list, 506ea2cf228SFred Isaman struct pnfs_layout_segment *lseg, 507b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 508b57ff130SWeston Andros Adamson u32 ds_commit_idx); 5090b7c0153SFred Isaman void nfs_commitdata_release(struct nfs_commit_data *data); 5106272dcc6SAnna Schumaker void nfs_request_add_commit_list(struct nfs_page *req, 511ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 51286d80f97STrond Myklebust void nfs_request_add_commit_list_locked(struct nfs_page *req, 51386d80f97STrond Myklebust struct list_head *dst, 51486d80f97STrond Myklebust struct nfs_commit_info *cinfo); 515ea2cf228SFred Isaman void nfs_request_remove_commit_list(struct nfs_page *req, 516ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 517ea2cf228SFred Isaman void nfs_init_cinfo(struct nfs_commit_info *cinfo, 518ea2cf228SFred Isaman struct inode *inode, 519ea2cf228SFred Isaman struct nfs_direct_req *dreq); 520dc24826bSAndy Adamson int nfs_key_timeout_notify(struct file *filp, struct inode *inode); 521ce52914eSScott Mayhew bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode); 522a7d42ddbSWeston Andros Adamson void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); 523e0c2b380SFred Isaman 524837bb1d7STrond Myklebust int nfs_filemap_write_and_wait_range(struct address_space *mapping, 525837bb1d7STrond Myklebust loff_t lstart, loff_t lend); 526837bb1d7STrond Myklebust 527a5314a74STrond Myklebust #ifdef CONFIG_NFS_V4_1 528a5314a74STrond Myklebust static inline 529a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 530a5314a74STrond Myklebust { 531a5314a74STrond Myklebust int i; 532a5314a74STrond Myklebust 533a5314a74STrond Myklebust for (i = 0; i < cinfo->nbuckets; i++) 534a5314a74STrond Myklebust cinfo->buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; 535a5314a74STrond Myklebust } 536a5314a74STrond Myklebust #else 537a5314a74STrond Myklebust static inline 538a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 539a5314a74STrond Myklebust { 540a5314a74STrond Myklebust } 541a5314a74STrond Myklebust #endif 542a5314a74STrond Myklebust 543074cc1deSTrond Myklebust #ifdef CONFIG_MIGRATION 544074cc1deSTrond Myklebust extern int nfs_migrate_page(struct address_space *, 545a6bc32b8SMel Gorman struct page *, struct page *, enum migrate_mode); 546074cc1deSTrond Myklebust #endif 547def6ed7eSAndy Adamson 5488fc3c386STrond Myklebust static inline int 5498fc3c386STrond Myklebust nfs_write_verifier_cmp(const struct nfs_write_verifier *v1, 5508fc3c386STrond Myklebust const struct nfs_write_verifier *v2) 5518fc3c386STrond Myklebust { 5528fc3c386STrond Myklebust return memcmp(v1->data, v2->data, sizeof(v1->data)); 5538fc3c386STrond Myklebust } 5548fc3c386STrond Myklebust 5550e862a40SJeff Layton /* unlink.c */ 5560e862a40SJeff Layton extern struct rpc_task * 5570e862a40SJeff Layton nfs_async_rename(struct inode *old_dir, struct inode *new_dir, 5580e862a40SJeff Layton struct dentry *old_dentry, struct dentry *new_dentry, 5590e862a40SJeff Layton void (*complete)(struct rpc_task *, struct nfs_renamedata *)); 5600e862a40SJeff Layton extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); 5610e862a40SJeff Layton 5621763da12SFred Isaman /* direct.c */ 5631763da12SFred Isaman void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, 5641763da12SFred Isaman struct nfs_direct_req *dreq); 5656296556fSPeng Tao extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); 5661763da12SFred Isaman 567cccef3b9SAndy Adamson /* nfs4proc.c */ 5688cab4c39SChuck Lever extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 5695c6e5b60STrond Myklebust const struct nfs_client_initdata *); 57005f4c350SChuck Lever extern int nfs40_walk_client_list(struct nfs_client *clp, 57105f4c350SChuck Lever struct nfs_client **result, 572a52458b4SNeilBrown const struct cred *cred); 57305f4c350SChuck Lever extern int nfs41_walk_client_list(struct nfs_client *clp, 57405f4c350SChuck Lever struct nfs_client **result, 575a52458b4SNeilBrown const struct cred *cred); 57610e037d1SSantosh kumar pradhan extern void nfs4_test_session_trunk(struct rpc_clnt *clnt, 57710e037d1SSantosh kumar pradhan struct rpc_xprt *xprt, 57810e037d1SSantosh kumar pradhan void *data); 579cccef3b9SAndy Adamson 580ea7c38feSTrond Myklebust static inline struct inode *nfs_igrab_and_active(struct inode *inode) 581ea7c38feSTrond Myklebust { 582ea7c38feSTrond Myklebust inode = igrab(inode); 583ea7c38feSTrond Myklebust if (inode != NULL && !nfs_sb_active(inode->i_sb)) { 584ea7c38feSTrond Myklebust iput(inode); 585ea7c38feSTrond Myklebust inode = NULL; 586ea7c38feSTrond Myklebust } 587ea7c38feSTrond Myklebust return inode; 588ea7c38feSTrond Myklebust } 589ea7c38feSTrond Myklebust 590ea7c38feSTrond Myklebust static inline void nfs_iput_and_deactive(struct inode *inode) 591ea7c38feSTrond Myklebust { 592ea7c38feSTrond Myklebust if (inode != NULL) { 593ea7c38feSTrond Myklebust struct super_block *sb = inode->i_sb; 594ea7c38feSTrond Myklebust 595ea7c38feSTrond Myklebust iput(inode); 596ea7c38feSTrond Myklebust nfs_sb_deactive(sb); 597ea7c38feSTrond Myklebust } 598ea7c38feSTrond Myklebust } 599ea7c38feSTrond Myklebust 600557134a3SAndy Adamson /* 601f7b422b1SDavid Howells * Determine the device name as a string 602f7b422b1SDavid Howells */ 603b514f872SAl Viro static inline char *nfs_devname(struct dentry *dentry, 604f7b422b1SDavid Howells char *buffer, ssize_t buflen) 605f7b422b1SDavid Howells { 606b514f872SAl Viro char *dummy; 60797a54868SBen Hutchings return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); 608f7b422b1SDavid Howells } 609f7b422b1SDavid Howells 610f7b422b1SDavid Howells /* 611f7b422b1SDavid Howells * Determine the actual block size (and log2 thereof) 612f7b422b1SDavid Howells */ 613f7b422b1SDavid Howells static inline 614f7b422b1SDavid Howells unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 615f7b422b1SDavid Howells { 616f7b422b1SDavid Howells /* make sure blocksize is a power of two */ 617f7b422b1SDavid Howells if ((bsize & (bsize - 1)) || nrbitsp) { 618f7b422b1SDavid Howells unsigned char nrbits; 619f7b422b1SDavid Howells 620f7b422b1SDavid Howells for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 621f7b422b1SDavid Howells ; 622f7b422b1SDavid Howells bsize = 1 << nrbits; 623f7b422b1SDavid Howells if (nrbitsp) 624f7b422b1SDavid Howells *nrbitsp = nrbits; 625f7b422b1SDavid Howells } 626f7b422b1SDavid Howells 627f7b422b1SDavid Howells return bsize; 628f7b422b1SDavid Howells } 629f7b422b1SDavid Howells 630f7b422b1SDavid Howells /* 631f7b422b1SDavid Howells * Calculate the number of 512byte blocks used. 632f7b422b1SDavid Howells */ 6339eaa67c6SChuck Lever static inline blkcnt_t nfs_calc_block_size(u64 tsize) 634f7b422b1SDavid Howells { 6359eaa67c6SChuck Lever blkcnt_t used = (tsize + 511) >> 9; 636f7b422b1SDavid Howells return (used > ULONG_MAX) ? ULONG_MAX : used; 637f7b422b1SDavid Howells } 638f7b422b1SDavid Howells 639f7b422b1SDavid Howells /* 640f7b422b1SDavid Howells * Compute and set NFS server blocksize 641f7b422b1SDavid Howells */ 642f7b422b1SDavid Howells static inline 643f7b422b1SDavid Howells unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 644f7b422b1SDavid Howells { 645f7b422b1SDavid Howells if (bsize < NFS_MIN_FILE_IO_SIZE) 646f7b422b1SDavid Howells bsize = NFS_DEF_FILE_IO_SIZE; 647f7b422b1SDavid Howells else if (bsize >= NFS_MAX_FILE_IO_SIZE) 648f7b422b1SDavid Howells bsize = NFS_MAX_FILE_IO_SIZE; 649f7b422b1SDavid Howells 650f7b422b1SDavid Howells return nfs_block_bits(bsize, nrbitsp); 651f7b422b1SDavid Howells } 652f7b422b1SDavid Howells 653f7b422b1SDavid Howells /* 654f7b422b1SDavid Howells * Determine the maximum file size for a superblock 655f7b422b1SDavid Howells */ 656f7b422b1SDavid Howells static inline 657f7b422b1SDavid Howells void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 658f7b422b1SDavid Howells { 659f7b422b1SDavid Howells sb->s_maxbytes = (loff_t)maxfilesize; 660f7b422b1SDavid Howells if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 661f7b422b1SDavid Howells sb->s_maxbytes = MAX_LFS_FILESIZE; 662f7b422b1SDavid Howells } 66349a70f27STrond Myklebust 66449a70f27STrond Myklebust /* 665d15bc38dSTom Haynes * Record the page as unstable and mark its inode as dirty. 666d15bc38dSTom Haynes */ 667d15bc38dSTom Haynes static inline 66886d80f97STrond Myklebust void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) 669d15bc38dSTom Haynes { 67086d80f97STrond Myklebust if (!cinfo->dreq) { 671d15bc38dSTom Haynes struct inode *inode = page_file_mapping(page)->host; 672d15bc38dSTom Haynes 67311fb9989SMel Gorman inc_node_page_state(page, NR_UNSTABLE_NFS); 67493f78d88STejun Heo inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE); 675d15bc38dSTom Haynes __mark_inode_dirty(inode, I_DIRTY_DATASYNC); 676d15bc38dSTom Haynes } 67786d80f97STrond Myklebust } 678d15bc38dSTom Haynes 679d15bc38dSTom Haynes /* 68049a70f27STrond Myklebust * Determine the number of bytes of data the page contains 68149a70f27STrond Myklebust */ 68249a70f27STrond Myklebust static inline 68349a70f27STrond Myklebust unsigned int nfs_page_length(struct page *page) 68449a70f27STrond Myklebust { 685d56b4ddfSMel Gorman loff_t i_size = i_size_read(page_file_mapping(page)->host); 68649a70f27STrond Myklebust 68749a70f27STrond Myklebust if (i_size > 0) { 6888cd79788SHuang Ying pgoff_t index = page_index(page); 68909cbfeafSKirill A. Shutemov pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; 6908cd79788SHuang Ying if (index < end_index) 69109cbfeafSKirill A. Shutemov return PAGE_SIZE; 6928cd79788SHuang Ying if (index == end_index) 69309cbfeafSKirill A. Shutemov return ((i_size - 1) & ~PAGE_MASK) + 1; 69449a70f27STrond Myklebust } 69549a70f27STrond Myklebust return 0; 69649a70f27STrond Myklebust } 6978d5658c9STrond Myklebust 6988d5658c9STrond Myklebust /* 6990b26a0bfSTrond Myklebust * Convert a umode to a dirent->d_type 7000b26a0bfSTrond Myklebust */ 7010b26a0bfSTrond Myklebust static inline 7020b26a0bfSTrond Myklebust unsigned char nfs_umode_to_dtype(umode_t mode) 7030b26a0bfSTrond Myklebust { 7040b26a0bfSTrond Myklebust return (mode >> 12) & 15; 7050b26a0bfSTrond Myklebust } 7060b26a0bfSTrond Myklebust 7070b26a0bfSTrond Myklebust /* 7088d5658c9STrond Myklebust * Determine the number of pages in an array of length 'len' and 7098d5658c9STrond Myklebust * with a base offset of 'base' 7108d5658c9STrond Myklebust */ 7118d5658c9STrond Myklebust static inline 7128d5658c9STrond Myklebust unsigned int nfs_page_array_len(unsigned int base, size_t len) 7138d5658c9STrond Myklebust { 7148d5658c9STrond Myklebust return ((unsigned long)len + (unsigned long)base + 7158d5658c9STrond Myklebust PAGE_SIZE - 1) >> PAGE_SHIFT; 7168d5658c9STrond Myklebust } 7170110ee15STrond Myklebust 7183a1556e8STrond Myklebust /* 7193a1556e8STrond Myklebust * Convert a struct timespec into a 64-bit change attribute 7203a1556e8STrond Myklebust * 7213a1556e8STrond Myklebust * This does approximately the same thing as timespec_to_ns(), 7223a1556e8STrond Myklebust * but for calculation efficiency, we multiply the seconds by 7233a1556e8STrond Myklebust * 1024*1024*1024. 7243a1556e8STrond Myklebust */ 7253a1556e8STrond Myklebust static inline 726e86d5a02STrond Myklebust u64 nfs_timespec_to_change_attr(const struct timespec64 *ts) 7273a1556e8STrond Myklebust { 7283a1556e8STrond Myklebust return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 7293a1556e8STrond Myklebust } 7301264a2f0STrond Myklebust 7311264a2f0STrond Myklebust #ifdef CONFIG_CRC32 7321264a2f0STrond Myklebust /** 7331264a2f0STrond Myklebust * nfs_fhandle_hash - calculate the crc32 hash for the filehandle 7341264a2f0STrond Myklebust * @fh - pointer to filehandle 7351264a2f0STrond Myklebust * 7361264a2f0STrond Myklebust * returns a crc32 hash for the filehandle that is compatible with 7371264a2f0STrond Myklebust * the one displayed by "wireshark". 7381264a2f0STrond Myklebust */ 7391264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7401264a2f0STrond Myklebust { 7411264a2f0STrond Myklebust return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); 7421264a2f0STrond Myklebust } 74348c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) 74448c9579aSOlga Kornievskaia { 74548c9579aSOlga Kornievskaia return ~crc32_le(0xFFFFFFFF, &stateid->other[0], 74648c9579aSOlga Kornievskaia NFS4_STATEID_OTHER_SIZE); 74748c9579aSOlga Kornievskaia } 7481264a2f0STrond Myklebust #else 7491264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7501264a2f0STrond Myklebust { 7511264a2f0STrond Myklebust return 0; 7521264a2f0STrond Myklebust } 75348c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) 75448c9579aSOlga Kornievskaia { 75548c9579aSOlga Kornievskaia return 0; 75648c9579aSOlga Kornievskaia } 7571264a2f0STrond Myklebust #endif 7580bcbf039SPeng Tao 7590bcbf039SPeng Tao static inline bool nfs_error_is_fatal(int err) 7600bcbf039SPeng Tao { 7610bcbf039SPeng Tao switch (err) { 7620bcbf039SPeng Tao case -ERESTARTSYS: 7637dc58ca5STrond Myklebust case -EINTR: 76454551d85STrond Myklebust case -EACCES: 76554551d85STrond Myklebust case -EDQUOT: 76654551d85STrond Myklebust case -EFBIG: 7670bcbf039SPeng Tao case -EIO: 7680bcbf039SPeng Tao case -ENOSPC: 7690bcbf039SPeng Tao case -EROFS: 77054551d85STrond Myklebust case -ESTALE: 7710bcbf039SPeng Tao case -E2BIG: 7722dc23affSTrond Myklebust case -ENOMEM: 77311982a7cSTrond Myklebust case -ETIMEDOUT: 7740bcbf039SPeng Tao return true; 7750bcbf039SPeng Tao default: 7760bcbf039SPeng Tao return false; 7770bcbf039SPeng Tao } 7780bcbf039SPeng Tao } 779bf4b4905SNeilBrown 7808f54c7a4STrond Myklebust static inline bool nfs_error_is_fatal_on_server(int err) 7818f54c7a4STrond Myklebust { 7828f54c7a4STrond Myklebust switch (err) { 7838f54c7a4STrond Myklebust case 0: 7848f54c7a4STrond Myklebust case -ERESTARTSYS: 7858f54c7a4STrond Myklebust case -EINTR: 7868f54c7a4STrond Myklebust return false; 7878f54c7a4STrond Myklebust } 7888f54c7a4STrond Myklebust return nfs_error_is_fatal(err); 7898f54c7a4STrond Myklebust } 7909954bf92SDavid Howells 7919954bf92SDavid Howells /* 7929954bf92SDavid Howells * Select between a default port value and a user-specified port value. 7939954bf92SDavid Howells * If a zero value is set, then autobind will be used. 7949954bf92SDavid Howells */ 7959954bf92SDavid Howells static inline void nfs_set_port(struct sockaddr *sap, int *port, 7969954bf92SDavid Howells const unsigned short default_port) 7979954bf92SDavid Howells { 7989954bf92SDavid Howells if (*port == NFS_UNSPEC_PORT) 7999954bf92SDavid Howells *port = default_port; 8009954bf92SDavid Howells 8019954bf92SDavid Howells rpc_set_port(sap, *port); 8029954bf92SDavid Howells } 803