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> 9f7b422b1SDavid Howells 1008734048SDavid Howells #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) 1108734048SDavid Howells 1254ceac45SDavid Howells struct nfs_string; 1354ceac45SDavid Howells 1454ceac45SDavid Howells /* Maximum number of readahead requests 1554ceac45SDavid Howells * FIXME: this should really be a sysctl so that users may tune it to suit 1654ceac45SDavid Howells * their needs. People that do NFS over a slow network, might for 1754ceac45SDavid Howells * instance want to reduce it to something closer to 1 for improved 1854ceac45SDavid Howells * interactive response. 1954ceac45SDavid Howells */ 2054ceac45SDavid Howells #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) 2154ceac45SDavid Howells 227ebb9315SBryan Schumaker static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) 237ebb9315SBryan Schumaker { 247ebb9315SBryan Schumaker if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid)) 257ebb9315SBryan Schumaker fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT; 267ebb9315SBryan Schumaker } 277ebb9315SBryan Schumaker 28533eb461SAndy Adamson static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) 29533eb461SAndy Adamson { 30533eb461SAndy Adamson if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) || 31533eb461SAndy Adamson (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) && 32533eb461SAndy Adamson ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0))) 33533eb461SAndy Adamson return 0; 34533eb461SAndy Adamson 35533eb461SAndy Adamson fattr->fileid = fattr->mounted_on_fileid; 36533eb461SAndy Adamson return 1; 37533eb461SAndy Adamson } 38533eb461SAndy Adamson 39f7b422b1SDavid Howells struct nfs_clone_mount { 40f7b422b1SDavid Howells const struct super_block *sb; 41f7b422b1SDavid Howells const struct dentry *dentry; 42f7b422b1SDavid Howells struct nfs_fh *fh; 43f7b422b1SDavid Howells struct nfs_fattr *fattr; 44f7b422b1SDavid Howells char *hostname; 45f7b422b1SDavid Howells char *mnt_path; 466677d095SChuck Lever struct sockaddr *addr; 476677d095SChuck Lever size_t addrlen; 48f7b422b1SDavid Howells rpc_authflavor_t authflavor; 49f7b422b1SDavid Howells }; 50f7b422b1SDavid Howells 516b18eaa0S\"Talpey, Thomas\ /* 52a14017dbSChuck Lever * Note: RFC 1813 doesn't limit the number of auth flavors that 53a14017dbSChuck Lever * a server can return, so make something up. 54a14017dbSChuck Lever */ 55a14017dbSChuck Lever #define NFS_MAX_SECFLAVORS (12) 56a14017dbSChuck Lever 57a14017dbSChuck Lever /* 584cfd74fcSChuck Lever * Value used if the user did not specify a port value. 594cfd74fcSChuck Lever */ 604cfd74fcSChuck Lever #define NFS_UNSPEC_PORT (-1) 614cfd74fcSChuck Lever 624cfd74fcSChuck Lever /* 6356e4ebf8SBryan Schumaker * Maximum number of pages that readdir can use for creating 6456e4ebf8SBryan Schumaker * a vmapped array of pages. 6556e4ebf8SBryan Schumaker */ 6656e4ebf8SBryan Schumaker #define NFS_MAX_READDIR_PAGES 8 6756e4ebf8SBryan Schumaker 68fcf10398SBryan Schumaker struct nfs_client_initdata { 69fcf10398SBryan Schumaker unsigned long init_flags; 70fcf10398SBryan Schumaker const char *hostname; 71fcf10398SBryan Schumaker const struct sockaddr *addr; 72fcf10398SBryan Schumaker size_t addrlen; 73ab7017a3SBryan Schumaker struct nfs_subversion *nfs_mod; 74fcf10398SBryan Schumaker int proto; 75fcf10398SBryan Schumaker u32 minorversion; 76fcf10398SBryan Schumaker struct net *net; 77fcf10398SBryan Schumaker }; 78fcf10398SBryan Schumaker 7956e4ebf8SBryan Schumaker /* 806b18eaa0S\"Talpey, Thomas\ * In-kernel mount arguments 816b18eaa0S\"Talpey, Thomas\ */ 826b18eaa0S\"Talpey, Thomas\ struct nfs_parsed_mount_data { 836b18eaa0S\"Talpey, Thomas\ int flags; 848cb7f74eSChuck Lever unsigned int rsize, wsize; 858cb7f74eSChuck Lever unsigned int timeo, retrans; 868cb7f74eSChuck Lever unsigned int acregmin, acregmax, 876b18eaa0S\"Talpey, Thomas\ acdirmin, acdirmax; 888cb7f74eSChuck Lever unsigned int namlen; 89b797cac7SDavid Howells unsigned int options; 906b18eaa0S\"Talpey, Thomas\ unsigned int bsize; 91a3f73c27SWeston Andros Adamson struct nfs_auth_info auth_info; 92a3f73c27SWeston Andros Adamson rpc_authflavor_t selected_flavor; 936b18eaa0S\"Talpey, Thomas\ char *client_address; 94764302ccSChuck Lever unsigned int version; 953fd5be9eSMike Sager unsigned int minorversion; 9608734048SDavid Howells char *fscache_uniq; 97b72e4f42SBryan Schumaker bool need_mount; 986b18eaa0S\"Talpey, Thomas\ 996b18eaa0S\"Talpey, Thomas\ struct { 1004c568017SChuck Lever struct sockaddr_storage address; 1014c568017SChuck Lever size_t addrlen; 1026b18eaa0S\"Talpey, Thomas\ char *hostname; 10378fa701fSChuck Lever u32 version; 1044cfd74fcSChuck Lever int port; 10578fa701fSChuck Lever unsigned short protocol; 1066b18eaa0S\"Talpey, Thomas\ } mount_server; 1076b18eaa0S\"Talpey, Thomas\ 1086b18eaa0S\"Talpey, Thomas\ struct { 1094c568017SChuck Lever struct sockaddr_storage address; 1104c568017SChuck Lever size_t addrlen; 1116b18eaa0S\"Talpey, Thomas\ char *hostname; 1126b18eaa0S\"Talpey, Thomas\ char *export_path; 1134cfd74fcSChuck Lever int port; 11478fa701fSChuck Lever unsigned short protocol; 1156b18eaa0S\"Talpey, Thomas\ } nfs_server; 116f9c3a380SEric Paris 117f9c3a380SEric Paris struct security_mnt_opts lsm_opts; 118e50a7a1aSStanislav Kinsbursky struct net *net; 1196b18eaa0S\"Talpey, Thomas\ }; 1206b18eaa0S\"Talpey, Thomas\ 121146ec944SChuck Lever /* mount_clnt.c */ 122c5d120f8SChuck Lever struct nfs_mount_request { 123c5d120f8SChuck Lever struct sockaddr *sap; 124c5d120f8SChuck Lever size_t salen; 125c5d120f8SChuck Lever char *hostname; 126c5d120f8SChuck Lever char *dirpath; 127c5d120f8SChuck Lever u32 version; 128c5d120f8SChuck Lever unsigned short protocol; 129c5d120f8SChuck Lever struct nfs_fh *fh; 13050a737f8SChuck Lever int noresvport; 1318e02f6b9SChuck Lever unsigned int *auth_flav_len; 1328e02f6b9SChuck Lever rpc_authflavor_t *auth_flavs; 1336d59b8d5SStanislav Kinsbursky struct net *net; 134c5d120f8SChuck Lever }; 135c5d120f8SChuck Lever 136fbdefd64SBryan Schumaker struct nfs_mount_info { 137fbdefd64SBryan Schumaker void (*fill_super)(struct super_block *, struct nfs_mount_info *); 138fbdefd64SBryan Schumaker int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); 139fbdefd64SBryan Schumaker struct nfs_parsed_mount_data *parsed; 140fbdefd64SBryan Schumaker struct nfs_clone_mount *cloned; 141fbdefd64SBryan Schumaker struct nfs_fh *mntfh; 142fbdefd64SBryan Schumaker }; 143fbdefd64SBryan Schumaker 144c5d120f8SChuck Lever extern int nfs_mount(struct nfs_mount_request *info); 1450b524123SChuck Lever extern void nfs_umount(const struct nfs_mount_request *info); 146146ec944SChuck Lever 14724c8dbbbSDavid Howells /* client.c */ 148a613fa16STrond Myklebust extern const struct rpc_program nfs_program; 1496b13168bSStanislav Kinsbursky extern void nfs_clients_init(struct net *net); 1506663ee7fSBryan Schumaker extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); 151428360d7SBryan Schumaker int nfs_create_rpc_client(struct nfs_client *, const struct rpc_timeout *, rpc_authflavor_t); 152fcf10398SBryan Schumaker struct nfs_client *nfs_get_client(const struct nfs_client_initdata *, 153fcf10398SBryan Schumaker const struct rpc_timeout *, const char *, 154fcf10398SBryan Schumaker rpc_authflavor_t); 155fcf10398SBryan Schumaker int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); 156fcf10398SBryan Schumaker void nfs_server_insert_lists(struct nfs_server *); 15732e62b7cSChuck Lever void nfs_server_remove_lists(struct nfs_server *); 158fcf10398SBryan Schumaker void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int); 159fcf10398SBryan Schumaker int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, 160fcf10398SBryan Schumaker rpc_authflavor_t); 161fcf10398SBryan Schumaker struct nfs_server *nfs_alloc_server(void); 162fcf10398SBryan Schumaker void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); 16354ceac45SDavid Howells 16428cd1b3fSStanislav Kinsbursky extern void nfs_cleanup_cb_ident_idr(struct net *); 16524c8dbbbSDavid Howells extern void nfs_put_client(struct nfs_client *); 166cdb7ecedSBryan Schumaker extern void nfs_free_client(struct nfs_client *); 16728cd1b3fSStanislav Kinsbursky extern struct nfs_client *nfs4_find_client_ident(struct net *, int); 168c36fca52SAndy Adamson extern struct nfs_client * 169c7add9a9SStanislav Kinsbursky nfs4_find_client_sessionid(struct net *, const struct sockaddr *, 170459de2edSBryan Schumaker struct nfs4_sessionid *, u32); 1711179acc6SBryan Schumaker extern struct nfs_server *nfs_create_server(struct nfs_mount_info *, 172ab7017a3SBryan Schumaker struct nfs_subversion *); 17391ea40b9S\"Talpey, Thomas\ extern struct nfs_server *nfs4_create_server( 1741179acc6SBryan Schumaker struct nfs_mount_info *, 1751179acc6SBryan Schumaker struct nfs_subversion *); 17654ceac45SDavid Howells extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, 17754ceac45SDavid Howells struct nfs_fh *); 17832e62b7cSChuck Lever extern int nfs4_update_server(struct nfs_server *server, const char *hostname, 179292f503cSTrond Myklebust struct sockaddr *sap, size_t salen, 180292f503cSTrond Myklebust struct net *net); 18154ceac45SDavid Howells extern void nfs_free_server(struct nfs_server *server); 18254ceac45SDavid Howells extern struct nfs_server *nfs_clone_server(struct nfs_server *, 18354ceac45SDavid Howells struct nfs_fh *, 1847e6eb683SBryan Schumaker struct nfs_fattr *, 1857e6eb683SBryan Schumaker rpc_authflavor_t); 1864697bd5eSTrond Myklebust extern int nfs_wait_client_init_complete(const struct nfs_client *clp); 18776db6d95SAndy Adamson extern void nfs_mark_client_ready(struct nfs_client *clp, int state); 188d83217c1SAndy Adamson extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, 189d83217c1SAndy Adamson const struct sockaddr *ds_addr, 19098fc685aSAndy Adamson int ds_addrlen, int ds_proto, 19198fc685aSAndy Adamson unsigned int ds_timeo, 192064172f3SPeng Tao unsigned int ds_retrans, 193064172f3SPeng Tao rpc_authflavor_t au_flavor); 1940e20162eSAndy Adamson extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, 1950e20162eSAndy Adamson struct inode *); 1961a04c6e1SPeng Tao extern struct nfs_client *nfs3_set_ds_client(struct nfs_client *mds_clp, 1971a04c6e1SPeng Tao const struct sockaddr *ds_addr, int ds_addrlen, 1981a04c6e1SPeng Tao int ds_proto, unsigned int ds_timeo, 1991a04c6e1SPeng Tao unsigned int ds_retrans, rpc_authflavor_t au_flavor); 2006aaca566SDavid Howells #ifdef CONFIG_PROC_FS 2016aaca566SDavid Howells extern int __init nfs_fs_proc_init(void); 2026aaca566SDavid Howells extern void nfs_fs_proc_exit(void); 20365b38851SEric W. Biederman extern int nfs_fs_proc_net_init(struct net *net); 20465b38851SEric W. Biederman extern void nfs_fs_proc_net_exit(struct net *net); 2056aaca566SDavid Howells #else 20665b38851SEric W. Biederman static inline int nfs_fs_proc_net_init(struct net *net) 20765b38851SEric W. Biederman { 20865b38851SEric W. Biederman return 0; 20965b38851SEric W. Biederman } 21065b38851SEric W. Biederman static inline void nfs_fs_proc_net_exit(struct net *net) 21165b38851SEric W. Biederman { 21265b38851SEric W. Biederman } 2136aaca566SDavid Howells static inline int nfs_fs_proc_init(void) 2146aaca566SDavid Howells { 2156aaca566SDavid Howells return 0; 2166aaca566SDavid Howells } 2176aaca566SDavid Howells static inline void nfs_fs_proc_exit(void) 2186aaca566SDavid Howells { 2196aaca566SDavid Howells } 2206aaca566SDavid Howells #endif 22124c8dbbbSDavid Howells 222fcf10398SBryan Schumaker #ifdef CONFIG_NFS_V4_1 223fcf10398SBryan Schumaker int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *); 224fcf10398SBryan Schumaker #endif 225fcf10398SBryan Schumaker 226f7b422b1SDavid Howells /* callback_xdr.c */ 227f7b422b1SDavid Howells extern struct svc_version nfs4_callback_version1; 22807bccc2dSAlexandros Batsakis extern struct svc_version nfs4_callback_version4; 229f7b422b1SDavid Howells 2304db6e0b7SFred Isaman struct nfs_pageio_descriptor; 231f7b422b1SDavid Howells /* pagelist.c */ 232f7b422b1SDavid Howells extern int __init nfs_init_nfspagecache(void); 233266bee88SDavid Brownell extern void nfs_destroy_nfspagecache(void); 234f7b422b1SDavid Howells extern int __init nfs_init_readpagecache(void); 235266bee88SDavid Brownell extern void nfs_destroy_readpagecache(void); 236f7b422b1SDavid Howells extern int __init nfs_init_writepagecache(void); 237266bee88SDavid Brownell extern void nfs_destroy_writepagecache(void); 238f7b422b1SDavid Howells 239f7b422b1SDavid Howells extern int __init nfs_init_directcache(void); 240266bee88SDavid Brownell extern void nfs_destroy_directcache(void); 2414db6e0b7SFred Isaman extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 2424db6e0b7SFred Isaman struct nfs_pgio_header *hdr, 2434db6e0b7SFred Isaman void (*release)(struct nfs_pgio_header *hdr)); 2444db6e0b7SFred Isaman void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 245577b4232STrond Myklebust int nfs_iocounter_wait(struct nfs_io_counter *c); 246577b4232STrond Myklebust 24741d8d5b7SAnna Schumaker extern const struct nfs_pageio_ops nfs_pgio_rw_ops; 2481e7f3a48SWeston Andros Adamson struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); 2491e7f3a48SWeston Andros Adamson void nfs_pgio_header_free(struct nfs_pgio_header *); 250d45f60c6SWeston Andros Adamson void nfs_pgio_data_destroy(struct nfs_pgio_header *); 251ef2c488cSAnna Schumaker int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); 252d45f60c6SWeston Andros Adamson int nfs_initiate_pgio(struct rpc_clnt *, struct nfs_pgio_header *, 2531ed26f33SAnna Schumaker const struct rpc_call_ops *, int, int); 254d4581383SWeston Andros Adamson void nfs_free_request(struct nfs_page *req); 25500bfa30aSAnna Schumaker 256577b4232STrond Myklebust static inline void nfs_iocounter_init(struct nfs_io_counter *c) 257577b4232STrond Myklebust { 258577b4232STrond Myklebust c->flags = 0; 259577b4232STrond Myklebust atomic_set(&c->io_count, 0); 260577b4232STrond Myklebust } 261f7b422b1SDavid Howells 262f7b422b1SDavid Howells /* nfs2xdr.c */ 263f7b422b1SDavid Howells extern struct rpc_procinfo nfs_procedures[]; 264573c4e1eSChuck Lever extern int nfs2_decode_dirent(struct xdr_stream *, 265573c4e1eSChuck Lever struct nfs_entry *, int); 266f7b422b1SDavid Howells 267f7b422b1SDavid Howells /* nfs3xdr.c */ 268f7b422b1SDavid Howells extern struct rpc_procinfo nfs3_procedures[]; 269573c4e1eSChuck Lever extern int nfs3_decode_dirent(struct xdr_stream *, 270573c4e1eSChuck Lever struct nfs_entry *, int); 271f7b422b1SDavid Howells 272f7b422b1SDavid Howells /* nfs4xdr.c */ 27389d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 274573c4e1eSChuck Lever extern int nfs4_decode_dirent(struct xdr_stream *, 275573c4e1eSChuck Lever struct nfs_entry *, int); 2767d4e2747SDavid Howells #endif 2772449ea2eSAlexandros Batsakis #ifdef CONFIG_NFS_V4_1 2782449ea2eSAlexandros Batsakis extern const u32 nfs41_maxread_overhead; 2792449ea2eSAlexandros Batsakis extern const u32 nfs41_maxwrite_overhead; 280f1c097beSAndy Adamson extern const u32 nfs41_maxgetdevinfo_overhead; 2812449ea2eSAlexandros Batsakis #endif 282f7b422b1SDavid Howells 283f7b422b1SDavid Howells /* nfs4proc.c */ 28489d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 285f7b422b1SDavid Howells extern struct rpc_procinfo nfs4_procedures[]; 286d75d5414SAndrew Morton #endif 287f7b422b1SDavid Howells 288694e096fSAnna Schumaker #ifdef CONFIG_NFS_V4_SECURITY_LABEL 289694e096fSAnna Schumaker extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); 290694e096fSAnna Schumaker static inline void nfs4_label_free(struct nfs4_label *label) 291694e096fSAnna Schumaker { 292694e096fSAnna Schumaker if (label) { 293694e096fSAnna Schumaker kfree(label->label); 294694e096fSAnna Schumaker kfree(label); 295694e096fSAnna Schumaker } 296694e096fSAnna Schumaker return; 297694e096fSAnna Schumaker } 298fd1defc2STrond Myklebust 299fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 300fd1defc2STrond Myklebust { 301fd1defc2STrond Myklebust if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) 302fd1defc2STrond Myklebust nfsi->cache_validity |= NFS_INO_INVALID_LABEL; 303fd1defc2STrond Myklebust } 304694e096fSAnna Schumaker #else 305694e096fSAnna Schumaker static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } 306694e096fSAnna Schumaker static inline void nfs4_label_free(void *label) {} 307fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 308fd1defc2STrond Myklebust { 309fd1defc2STrond Myklebust } 310694e096fSAnna Schumaker #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 311694e096fSAnna Schumaker 3127fe5c398STrond Myklebust /* proc.c */ 3137fe5c398STrond Myklebust void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 3148cab4c39SChuck Lever extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 31545a52a02SAndy Adamson const struct rpc_timeout *timeparms, 316f8407299SAndy Adamson const char *ip_addr); 3177fe5c398STrond Myklebust 318979df72eSTrond Myklebust /* dir.c */ 319311324adSTrond Myklebust extern void nfs_force_use_readdirplus(struct inode *dir); 3201ab6c499SDave Chinner extern unsigned long nfs_access_cache_count(struct shrinker *shrink, 3211ab6c499SDave Chinner struct shrink_control *sc); 3221ab6c499SDave Chinner extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, 3231495f230SYing Han struct shrink_control *sc); 324597d9289SBryan Schumaker struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 325597d9289SBryan Schumaker int nfs_create(struct inode *, struct dentry *, umode_t, bool); 326597d9289SBryan Schumaker int nfs_mkdir(struct inode *, struct dentry *, umode_t); 327597d9289SBryan Schumaker int nfs_rmdir(struct inode *, struct dentry *); 328597d9289SBryan Schumaker int nfs_unlink(struct inode *, struct dentry *); 329597d9289SBryan Schumaker int nfs_symlink(struct inode *, struct dentry *, const char *); 330597d9289SBryan Schumaker int nfs_link(struct dentry *, struct inode *, struct dentry *); 331597d9289SBryan Schumaker int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); 332597d9289SBryan Schumaker int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); 333979df72eSTrond Myklebust 334ce4ef7c0SBryan Schumaker /* file.c */ 335ce4ef7c0SBryan Schumaker int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int); 336ce4ef7c0SBryan Schumaker loff_t nfs_file_llseek(struct file *, loff_t, int); 337ce4ef7c0SBryan Schumaker int nfs_file_flush(struct file *, fl_owner_t); 3383aa2d199SAl Viro ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); 339ce4ef7c0SBryan Schumaker ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *, 340ce4ef7c0SBryan Schumaker size_t, unsigned int); 341ce4ef7c0SBryan Schumaker int nfs_file_mmap(struct file *, struct vm_area_struct *); 342edaf4369SAl Viro ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); 343ce4ef7c0SBryan Schumaker int nfs_file_release(struct inode *, struct file *); 344ce4ef7c0SBryan Schumaker int nfs_lock(struct file *, int, struct file_lock *); 345ce4ef7c0SBryan Schumaker int nfs_flock(struct file *, int, struct file_lock *); 346ce4ef7c0SBryan Schumaker int nfs_check_flags(int); 347ce4ef7c0SBryan Schumaker 348f7b422b1SDavid Howells /* inode.c */ 3495746006fSTrond Myklebust extern struct workqueue_struct *nfsiod_workqueue; 350f7b422b1SDavid Howells extern struct inode *nfs_alloc_inode(struct super_block *sb); 351f7b422b1SDavid Howells extern void nfs_destroy_inode(struct inode *); 352a9185b41SChristoph Hellwig extern int nfs_write_inode(struct inode *, struct writeback_control *); 353eed99357STrond Myklebust extern int nfs_drop_inode(struct inode *); 35419d87ca3SBryan Schumaker extern void nfs_clear_inode(struct inode *); 355b57922d9SAl Viro extern void nfs_evict_inode(struct inode *); 356f41f7418STrond Myklebust void nfs_zap_acl_cache(struct inode *inode); 357c1221321SNeilBrown extern int nfs_wait_bit_killable(struct wait_bit_key *key); 358f7b422b1SDavid Howells 359f7b422b1SDavid Howells /* super.c */ 3606a74490dSBryan Schumaker extern const struct super_operations nfs_sops; 361ab7017a3SBryan Schumaker extern struct file_system_type nfs_fs_type; 36254ceac45SDavid Howells extern struct file_system_type nfs_xdev_fs_type; 36389d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 36454ceac45SDavid Howells extern struct file_system_type nfs4_xdev_fs_type; 36554ceac45SDavid Howells extern struct file_system_type nfs4_referral_fs_type; 366f7b422b1SDavid Howells #endif 3674d4b69ddSWeston Andros Adamson bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); 368ff9099f2SBryan Schumaker struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, 369ff9099f2SBryan Schumaker struct nfs_subversion *); 370fbdefd64SBryan Schumaker void nfs_initialise_sb(struct super_block *); 371fbdefd64SBryan Schumaker int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); 372fbdefd64SBryan Schumaker int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); 373ab7017a3SBryan Schumaker struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *, 374ab7017a3SBryan Schumaker struct nfs_mount_info *, struct nfs_subversion *); 375fbdefd64SBryan Schumaker struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); 376fbdefd64SBryan Schumaker struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, 377fbdefd64SBryan Schumaker const char *, struct nfs_mount_info *); 378fbdefd64SBryan Schumaker void nfs_kill_super(struct super_block *); 379fbdefd64SBryan Schumaker void nfs_fill_super(struct super_block *, struct nfs_mount_info *); 3804ebd9ab3SDominik Hackl 381f7b422b1SDavid Howells extern struct rpc_stat nfs_rpcstat; 3824ebd9ab3SDominik Hackl 383f7b422b1SDavid Howells extern int __init register_nfs_fs(void); 384f7b422b1SDavid Howells extern void __exit unregister_nfs_fs(void); 3851daef0a8STrond Myklebust extern void nfs_sb_active(struct super_block *sb); 3861daef0a8STrond Myklebust extern void nfs_sb_deactive(struct super_block *sb); 387f7b422b1SDavid Howells 388f7b422b1SDavid Howells /* namespace.c */ 38997a54868SBen Hutchings #define NFS_PATH_CANONICAL 1 390b514f872SAl Viro extern char *nfs_path(char **p, struct dentry *dentry, 39197a54868SBen Hutchings char *buffer, ssize_t buflen, unsigned flags); 39236d43a43SDavid Howells extern struct vfsmount *nfs_d_automount(struct path *path); 393281cad46SBryan Schumaker struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, 394281cad46SBryan Schumaker struct nfs_fh *, struct nfs_fattr *); 395281cad46SBryan Schumaker struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, 396281cad46SBryan Schumaker struct nfs_fattr *, rpc_authflavor_t); 397f7b422b1SDavid Howells 39854ceac45SDavid Howells /* getroot.c */ 3990d5839adSAl Viro extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, 4000d5839adSAl Viro const char *); 40189d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 4020d5839adSAl Viro extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, 4030d5839adSAl Viro const char *); 40454ceac45SDavid Howells 4055e6b1990STrond Myklebust extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); 4067d4e2747SDavid Howells #endif 407f7b422b1SDavid Howells 408061ae2edSFred Isaman struct nfs_pgio_completion_ops; 409f11c88afSAndy Adamson /* read.c */ 410584aa810SFred Isaman extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 411fab5fc25SChristoph Hellwig struct inode *inode, bool force_mds, 412584aa810SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 413f11c88afSAndy Adamson extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 414493292ddSTrond Myklebust extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 415e885de1aSTrond Myklebust 416fbdefd64SBryan Schumaker /* super.c */ 417fbdefd64SBryan Schumaker void nfs_clone_super(struct super_block *, struct nfs_mount_info *); 418fbdefd64SBryan Schumaker void nfs_umount_begin(struct super_block *); 419fbdefd64SBryan Schumaker int nfs_statfs(struct dentry *, struct kstatfs *); 420fbdefd64SBryan Schumaker int nfs_show_options(struct seq_file *, struct dentry *); 421fbdefd64SBryan Schumaker int nfs_show_devname(struct seq_file *, struct dentry *); 422fbdefd64SBryan Schumaker int nfs_show_path(struct seq_file *, struct dentry *); 423fbdefd64SBryan Schumaker int nfs_show_stats(struct seq_file *, struct dentry *); 424fbdefd64SBryan Schumaker void nfs_put_super(struct super_block *); 425fbdefd64SBryan Schumaker int nfs_remount(struct super_block *sb, int *flags, char *raw_data); 426fbdefd64SBryan Schumaker 427def6ed7eSAndy Adamson /* write.c */ 4281763da12SFred Isaman extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 429a20c93e3SChristoph Hellwig struct inode *inode, int ioflags, bool force_mds, 4301763da12SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 431dce81290STrond Myklebust extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 4320b7c0153SFred Isaman extern void nfs_commit_free(struct nfs_commit_data *p); 433def6ed7eSAndy Adamson extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 4340b7c0153SFred Isaman extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 4350b7c0153SFred Isaman extern int nfs_initiate_commit(struct rpc_clnt *clnt, 4360b7c0153SFred Isaman struct nfs_commit_data *data, 437e0c2b380SFred Isaman const struct rpc_call_ops *call_ops, 4389f0ec176SAndy Adamson int how, int flags); 4390b7c0153SFred Isaman extern void nfs_init_commit(struct nfs_commit_data *data, 440e0c2b380SFred Isaman struct list_head *head, 441f453a54aSFred Isaman struct pnfs_layout_segment *lseg, 442f453a54aSFred Isaman struct nfs_commit_info *cinfo); 4431763da12SFred Isaman int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 4441763da12SFred Isaman struct nfs_commit_info *cinfo, int max); 445ce59515cSAnna Schumaker unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); 4461763da12SFred Isaman int nfs_scan_commit(struct inode *inode, struct list_head *dst, 4471763da12SFred Isaman struct nfs_commit_info *cinfo); 4481763da12SFred Isaman void nfs_mark_request_commit(struct nfs_page *req, 4491763da12SFred Isaman struct pnfs_layout_segment *lseg, 4501763da12SFred Isaman struct nfs_commit_info *cinfo); 451c65e6254SWeston Andros Adamson int nfs_write_need_commit(struct nfs_pgio_header *); 4521763da12SFred Isaman int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 4531763da12SFred Isaman int how, struct nfs_commit_info *cinfo); 454e0c2b380SFred Isaman void nfs_retry_commit(struct list_head *page_list, 455ea2cf228SFred Isaman struct pnfs_layout_segment *lseg, 456ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 4570b7c0153SFred Isaman void nfs_commitdata_release(struct nfs_commit_data *data); 458ea2cf228SFred Isaman void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst, 459ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 460ea2cf228SFred Isaman void nfs_request_remove_commit_list(struct nfs_page *req, 461ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 462ea2cf228SFred Isaman void nfs_init_cinfo(struct nfs_commit_info *cinfo, 463ea2cf228SFred Isaman struct inode *inode, 464ea2cf228SFred Isaman struct nfs_direct_req *dreq); 465dc24826bSAndy Adamson int nfs_key_timeout_notify(struct file *filp, struct inode *inode); 466dc24826bSAndy Adamson bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx); 467e0c2b380SFred Isaman 468074cc1deSTrond Myklebust #ifdef CONFIG_MIGRATION 469074cc1deSTrond Myklebust extern int nfs_migrate_page(struct address_space *, 470a6bc32b8SMel Gorman struct page *, struct page *, enum migrate_mode); 471074cc1deSTrond Myklebust #else 472074cc1deSTrond Myklebust #define nfs_migrate_page NULL 473074cc1deSTrond Myklebust #endif 474def6ed7eSAndy Adamson 4750e862a40SJeff Layton /* unlink.c */ 4760e862a40SJeff Layton extern struct rpc_task * 4770e862a40SJeff Layton nfs_async_rename(struct inode *old_dir, struct inode *new_dir, 4780e862a40SJeff Layton struct dentry *old_dentry, struct dentry *new_dentry, 4790e862a40SJeff Layton void (*complete)(struct rpc_task *, struct nfs_renamedata *)); 4800e862a40SJeff Layton extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); 4810e862a40SJeff Layton 4821763da12SFred Isaman /* direct.c */ 4831763da12SFred Isaman void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, 4841763da12SFred Isaman struct nfs_direct_req *dreq); 4851d59d61fSTrond Myklebust static inline void nfs_inode_dio_wait(struct inode *inode) 4861d59d61fSTrond Myklebust { 4871d59d61fSTrond Myklebust inode_dio_wait(inode); 4881d59d61fSTrond Myklebust } 4896296556fSPeng Tao extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); 4901763da12SFred Isaman 491cccef3b9SAndy Adamson /* nfs4proc.c */ 492d45f60c6SWeston Andros Adamson extern void __nfs4_read_done_cb(struct nfs_pgio_header *); 4938cab4c39SChuck Lever extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 49445a52a02SAndy Adamson const struct rpc_timeout *timeparms, 495f8407299SAndy Adamson const char *ip_addr); 49605f4c350SChuck Lever extern int nfs40_walk_client_list(struct nfs_client *clp, 49705f4c350SChuck Lever struct nfs_client **result, 49805f4c350SChuck Lever struct rpc_cred *cred); 49905f4c350SChuck Lever extern int nfs41_walk_client_list(struct nfs_client *clp, 50005f4c350SChuck Lever struct nfs_client **result, 50105f4c350SChuck Lever struct rpc_cred *cred); 502cccef3b9SAndy Adamson 503557134a3SAndy Adamson /* 504f7b422b1SDavid Howells * Determine the device name as a string 505f7b422b1SDavid Howells */ 506b514f872SAl Viro static inline char *nfs_devname(struct dentry *dentry, 507f7b422b1SDavid Howells char *buffer, ssize_t buflen) 508f7b422b1SDavid Howells { 509b514f872SAl Viro char *dummy; 51097a54868SBen Hutchings return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); 511f7b422b1SDavid Howells } 512f7b422b1SDavid Howells 513f7b422b1SDavid Howells /* 514f7b422b1SDavid Howells * Determine the actual block size (and log2 thereof) 515f7b422b1SDavid Howells */ 516f7b422b1SDavid Howells static inline 517f7b422b1SDavid Howells unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 518f7b422b1SDavid Howells { 519f7b422b1SDavid Howells /* make sure blocksize is a power of two */ 520f7b422b1SDavid Howells if ((bsize & (bsize - 1)) || nrbitsp) { 521f7b422b1SDavid Howells unsigned char nrbits; 522f7b422b1SDavid Howells 523f7b422b1SDavid Howells for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 524f7b422b1SDavid Howells ; 525f7b422b1SDavid Howells bsize = 1 << nrbits; 526f7b422b1SDavid Howells if (nrbitsp) 527f7b422b1SDavid Howells *nrbitsp = nrbits; 528f7b422b1SDavid Howells } 529f7b422b1SDavid Howells 530f7b422b1SDavid Howells return bsize; 531f7b422b1SDavid Howells } 532f7b422b1SDavid Howells 533f7b422b1SDavid Howells /* 534f7b422b1SDavid Howells * Calculate the number of 512byte blocks used. 535f7b422b1SDavid Howells */ 5369eaa67c6SChuck Lever static inline blkcnt_t nfs_calc_block_size(u64 tsize) 537f7b422b1SDavid Howells { 5389eaa67c6SChuck Lever blkcnt_t used = (tsize + 511) >> 9; 539f7b422b1SDavid Howells return (used > ULONG_MAX) ? ULONG_MAX : used; 540f7b422b1SDavid Howells } 541f7b422b1SDavid Howells 542f7b422b1SDavid Howells /* 543f7b422b1SDavid Howells * Compute and set NFS server blocksize 544f7b422b1SDavid Howells */ 545f7b422b1SDavid Howells static inline 546f7b422b1SDavid Howells unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 547f7b422b1SDavid Howells { 548f7b422b1SDavid Howells if (bsize < NFS_MIN_FILE_IO_SIZE) 549f7b422b1SDavid Howells bsize = NFS_DEF_FILE_IO_SIZE; 550f7b422b1SDavid Howells else if (bsize >= NFS_MAX_FILE_IO_SIZE) 551f7b422b1SDavid Howells bsize = NFS_MAX_FILE_IO_SIZE; 552f7b422b1SDavid Howells 553f7b422b1SDavid Howells return nfs_block_bits(bsize, nrbitsp); 554f7b422b1SDavid Howells } 555f7b422b1SDavid Howells 556f7b422b1SDavid Howells /* 557f7b422b1SDavid Howells * Determine the maximum file size for a superblock 558f7b422b1SDavid Howells */ 559f7b422b1SDavid Howells static inline 560f7b422b1SDavid Howells void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 561f7b422b1SDavid Howells { 562f7b422b1SDavid Howells sb->s_maxbytes = (loff_t)maxfilesize; 563f7b422b1SDavid Howells if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 564f7b422b1SDavid Howells sb->s_maxbytes = MAX_LFS_FILESIZE; 565f7b422b1SDavid Howells } 56649a70f27STrond Myklebust 56749a70f27STrond Myklebust /* 56849a70f27STrond Myklebust * Determine the number of bytes of data the page contains 56949a70f27STrond Myklebust */ 57049a70f27STrond Myklebust static inline 57149a70f27STrond Myklebust unsigned int nfs_page_length(struct page *page) 57249a70f27STrond Myklebust { 573d56b4ddfSMel Gorman loff_t i_size = i_size_read(page_file_mapping(page)->host); 57449a70f27STrond Myklebust 57549a70f27STrond Myklebust if (i_size > 0) { 576d56b4ddfSMel Gorman pgoff_t page_index = page_file_index(page); 57749a70f27STrond Myklebust pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; 578d56b4ddfSMel Gorman if (page_index < end_index) 57949a70f27STrond Myklebust return PAGE_CACHE_SIZE; 580d56b4ddfSMel Gorman if (page_index == end_index) 58149a70f27STrond Myklebust return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1; 58249a70f27STrond Myklebust } 58349a70f27STrond Myklebust return 0; 58449a70f27STrond Myklebust } 5858d5658c9STrond Myklebust 5868d5658c9STrond Myklebust /* 5870b26a0bfSTrond Myklebust * Convert a umode to a dirent->d_type 5880b26a0bfSTrond Myklebust */ 5890b26a0bfSTrond Myklebust static inline 5900b26a0bfSTrond Myklebust unsigned char nfs_umode_to_dtype(umode_t mode) 5910b26a0bfSTrond Myklebust { 5920b26a0bfSTrond Myklebust return (mode >> 12) & 15; 5930b26a0bfSTrond Myklebust } 5940b26a0bfSTrond Myklebust 5950b26a0bfSTrond Myklebust /* 5968d5658c9STrond Myklebust * Determine the number of pages in an array of length 'len' and 5978d5658c9STrond Myklebust * with a base offset of 'base' 5988d5658c9STrond Myklebust */ 5998d5658c9STrond Myklebust static inline 6008d5658c9STrond Myklebust unsigned int nfs_page_array_len(unsigned int base, size_t len) 6018d5658c9STrond Myklebust { 6028d5658c9STrond Myklebust return ((unsigned long)len + (unsigned long)base + 6038d5658c9STrond Myklebust PAGE_SIZE - 1) >> PAGE_SHIFT; 6048d5658c9STrond Myklebust } 6050110ee15STrond Myklebust 6063a1556e8STrond Myklebust /* 6073a1556e8STrond Myklebust * Convert a struct timespec into a 64-bit change attribute 6083a1556e8STrond Myklebust * 6093a1556e8STrond Myklebust * This does approximately the same thing as timespec_to_ns(), 6103a1556e8STrond Myklebust * but for calculation efficiency, we multiply the seconds by 6113a1556e8STrond Myklebust * 1024*1024*1024. 6123a1556e8STrond Myklebust */ 6133a1556e8STrond Myklebust static inline 6143a1556e8STrond Myklebust u64 nfs_timespec_to_change_attr(const struct timespec *ts) 6153a1556e8STrond Myklebust { 6163a1556e8STrond Myklebust return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 6173a1556e8STrond Myklebust } 6181264a2f0STrond Myklebust 6191264a2f0STrond Myklebust #ifdef CONFIG_CRC32 6201264a2f0STrond Myklebust /** 6211264a2f0STrond Myklebust * nfs_fhandle_hash - calculate the crc32 hash for the filehandle 6221264a2f0STrond Myklebust * @fh - pointer to filehandle 6231264a2f0STrond Myklebust * 6241264a2f0STrond Myklebust * returns a crc32 hash for the filehandle that is compatible with 6251264a2f0STrond Myklebust * the one displayed by "wireshark". 6261264a2f0STrond Myklebust */ 6271264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 6281264a2f0STrond Myklebust { 6291264a2f0STrond Myklebust return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); 6301264a2f0STrond Myklebust } 6311264a2f0STrond Myklebust #else 6321264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 6331264a2f0STrond Myklebust { 6341264a2f0STrond Myklebust return 0; 6351264a2f0STrond Myklebust } 6361264a2f0STrond Myklebust #endif 637