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; 916b18eaa0S\"Talpey, Thomas\ unsigned int auth_flavor_len; 926b18eaa0S\"Talpey, Thomas\ rpc_authflavor_t auth_flavors[1]; 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 *); 157fcf10398SBryan Schumaker void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int); 158fcf10398SBryan Schumaker int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, 159fcf10398SBryan Schumaker rpc_authflavor_t); 160fcf10398SBryan Schumaker struct nfs_server *nfs_alloc_server(void); 161fcf10398SBryan Schumaker void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); 16254ceac45SDavid Howells 16328cd1b3fSStanislav Kinsbursky extern void nfs_cleanup_cb_ident_idr(struct net *); 16424c8dbbbSDavid Howells extern void nfs_put_client(struct nfs_client *); 165cdb7ecedSBryan Schumaker extern void nfs_free_client(struct nfs_client *); 16628cd1b3fSStanislav Kinsbursky extern struct nfs_client *nfs4_find_client_ident(struct net *, int); 167c36fca52SAndy Adamson extern struct nfs_client * 168c7add9a9SStanislav Kinsbursky nfs4_find_client_sessionid(struct net *, const struct sockaddr *, 169459de2edSBryan Schumaker struct nfs4_sessionid *, u32); 1701179acc6SBryan Schumaker extern struct nfs_server *nfs_create_server(struct nfs_mount_info *, 171ab7017a3SBryan Schumaker struct nfs_subversion *); 17291ea40b9S\"Talpey, Thomas\ extern struct nfs_server *nfs4_create_server( 1731179acc6SBryan Schumaker struct nfs_mount_info *, 1741179acc6SBryan Schumaker struct nfs_subversion *); 17554ceac45SDavid Howells extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, 17654ceac45SDavid Howells struct nfs_fh *); 17754ceac45SDavid Howells extern void nfs_free_server(struct nfs_server *server); 17854ceac45SDavid Howells extern struct nfs_server *nfs_clone_server(struct nfs_server *, 17954ceac45SDavid Howells struct nfs_fh *, 1807e6eb683SBryan Schumaker struct nfs_fattr *, 1817e6eb683SBryan Schumaker rpc_authflavor_t); 1824697bd5eSTrond Myklebust extern int nfs_wait_client_init_complete(const struct nfs_client *clp); 18376db6d95SAndy Adamson extern void nfs_mark_client_ready(struct nfs_client *clp, int state); 184d83217c1SAndy Adamson extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, 185d83217c1SAndy Adamson const struct sockaddr *ds_addr, 18698fc685aSAndy Adamson int ds_addrlen, int ds_proto, 18798fc685aSAndy Adamson unsigned int ds_timeo, 18898fc685aSAndy Adamson unsigned int ds_retrans); 1896aaca566SDavid Howells #ifdef CONFIG_PROC_FS 1906aaca566SDavid Howells extern int __init nfs_fs_proc_init(void); 1916aaca566SDavid Howells extern void nfs_fs_proc_exit(void); 1926aaca566SDavid Howells #else 1936aaca566SDavid Howells static inline int nfs_fs_proc_init(void) 1946aaca566SDavid Howells { 1956aaca566SDavid Howells return 0; 1966aaca566SDavid Howells } 1976aaca566SDavid Howells static inline void nfs_fs_proc_exit(void) 1986aaca566SDavid Howells { 1996aaca566SDavid Howells } 2006aaca566SDavid Howells #endif 20124c8dbbbSDavid Howells 202fcf10398SBryan Schumaker #ifdef CONFIG_NFS_V4_1 203fcf10398SBryan Schumaker int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *); 204fcf10398SBryan Schumaker #endif 205fcf10398SBryan Schumaker 2061179acc6SBryan Schumaker /* nfs3client.c */ 2071c606fb7SBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V3) 2081179acc6SBryan Schumaker struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *); 2091179acc6SBryan Schumaker struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *, 2101179acc6SBryan Schumaker struct nfs_fattr *, rpc_authflavor_t); 2111179acc6SBryan Schumaker #endif 2121179acc6SBryan Schumaker 213f7b422b1SDavid Howells /* callback_xdr.c */ 214f7b422b1SDavid Howells extern struct svc_version nfs4_callback_version1; 21507bccc2dSAlexandros Batsakis extern struct svc_version nfs4_callback_version4; 216f7b422b1SDavid Howells 2174db6e0b7SFred Isaman struct nfs_pageio_descriptor; 218f7b422b1SDavid Howells /* pagelist.c */ 219f7b422b1SDavid Howells extern int __init nfs_init_nfspagecache(void); 220266bee88SDavid Brownell extern void nfs_destroy_nfspagecache(void); 221f7b422b1SDavid Howells extern int __init nfs_init_readpagecache(void); 222266bee88SDavid Brownell extern void nfs_destroy_readpagecache(void); 223f7b422b1SDavid Howells extern int __init nfs_init_writepagecache(void); 224266bee88SDavid Brownell extern void nfs_destroy_writepagecache(void); 225f7b422b1SDavid Howells 226f7b422b1SDavid Howells extern int __init nfs_init_directcache(void); 227266bee88SDavid Brownell extern void nfs_destroy_directcache(void); 22830dd374fSFred Isaman extern bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount); 2294db6e0b7SFred Isaman extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 2304db6e0b7SFred Isaman struct nfs_pgio_header *hdr, 2314db6e0b7SFred Isaman void (*release)(struct nfs_pgio_header *hdr)); 2324db6e0b7SFred Isaman void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 233577b4232STrond Myklebust int nfs_iocounter_wait(struct nfs_io_counter *c); 234577b4232STrond Myklebust 235577b4232STrond Myklebust static inline void nfs_iocounter_init(struct nfs_io_counter *c) 236577b4232STrond Myklebust { 237577b4232STrond Myklebust c->flags = 0; 238577b4232STrond Myklebust atomic_set(&c->io_count, 0); 239577b4232STrond Myklebust } 240f7b422b1SDavid Howells 241f7b422b1SDavid Howells /* nfs2xdr.c */ 242f7b422b1SDavid Howells extern struct rpc_procinfo nfs_procedures[]; 243573c4e1eSChuck Lever extern int nfs2_decode_dirent(struct xdr_stream *, 244573c4e1eSChuck Lever struct nfs_entry *, int); 245f7b422b1SDavid Howells 246f7b422b1SDavid Howells /* nfs3xdr.c */ 247f7b422b1SDavid Howells extern struct rpc_procinfo nfs3_procedures[]; 248573c4e1eSChuck Lever extern int nfs3_decode_dirent(struct xdr_stream *, 249573c4e1eSChuck Lever struct nfs_entry *, int); 250f7b422b1SDavid Howells 251f7b422b1SDavid Howells /* nfs4xdr.c */ 25289d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 253573c4e1eSChuck Lever extern int nfs4_decode_dirent(struct xdr_stream *, 254573c4e1eSChuck Lever struct nfs_entry *, int); 2557d4e2747SDavid Howells #endif 2562449ea2eSAlexandros Batsakis #ifdef CONFIG_NFS_V4_1 2572449ea2eSAlexandros Batsakis extern const u32 nfs41_maxread_overhead; 2582449ea2eSAlexandros Batsakis extern const u32 nfs41_maxwrite_overhead; 259f1c097beSAndy Adamson extern const u32 nfs41_maxgetdevinfo_overhead; 2602449ea2eSAlexandros Batsakis #endif 261f7b422b1SDavid Howells 262f7b422b1SDavid Howells /* nfs4proc.c */ 26389d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 264f7b422b1SDavid Howells extern struct rpc_procinfo nfs4_procedures[]; 265d75d5414SAndrew Morton #endif 266f7b422b1SDavid Howells 2677fe5c398STrond Myklebust /* proc.c */ 2687fe5c398STrond Myklebust void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 2698cab4c39SChuck Lever extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 27045a52a02SAndy Adamson const struct rpc_timeout *timeparms, 271f8407299SAndy Adamson const char *ip_addr); 2727fe5c398STrond Myklebust 273979df72eSTrond Myklebust /* dir.c */ 2747f8275d0SDave Chinner extern int nfs_access_cache_shrinker(struct shrinker *shrink, 2751495f230SYing Han struct shrink_control *sc); 276597d9289SBryan Schumaker struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 277597d9289SBryan Schumaker int nfs_create(struct inode *, struct dentry *, umode_t, bool); 278597d9289SBryan Schumaker int nfs_mkdir(struct inode *, struct dentry *, umode_t); 279597d9289SBryan Schumaker int nfs_rmdir(struct inode *, struct dentry *); 280597d9289SBryan Schumaker int nfs_unlink(struct inode *, struct dentry *); 281597d9289SBryan Schumaker int nfs_symlink(struct inode *, struct dentry *, const char *); 282597d9289SBryan Schumaker int nfs_link(struct dentry *, struct inode *, struct dentry *); 283597d9289SBryan Schumaker int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); 284597d9289SBryan Schumaker int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); 285979df72eSTrond Myklebust 286ce4ef7c0SBryan Schumaker /* file.c */ 287ce4ef7c0SBryan Schumaker int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int); 288ce4ef7c0SBryan Schumaker loff_t nfs_file_llseek(struct file *, loff_t, int); 289ce4ef7c0SBryan Schumaker int nfs_file_flush(struct file *, fl_owner_t); 290ce4ef7c0SBryan Schumaker ssize_t nfs_file_read(struct kiocb *, const struct iovec *, unsigned long, loff_t); 291ce4ef7c0SBryan Schumaker ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *, 292ce4ef7c0SBryan Schumaker size_t, unsigned int); 293ce4ef7c0SBryan Schumaker int nfs_file_mmap(struct file *, struct vm_area_struct *); 294ce4ef7c0SBryan Schumaker ssize_t nfs_file_write(struct kiocb *, const struct iovec *, unsigned long, loff_t); 295ce4ef7c0SBryan Schumaker int nfs_file_release(struct inode *, struct file *); 296ce4ef7c0SBryan Schumaker int nfs_lock(struct file *, int, struct file_lock *); 297ce4ef7c0SBryan Schumaker int nfs_flock(struct file *, int, struct file_lock *); 298ce4ef7c0SBryan Schumaker ssize_t nfs_file_splice_write(struct pipe_inode_info *, struct file *, loff_t *, 299ce4ef7c0SBryan Schumaker size_t, unsigned int); 300ce4ef7c0SBryan Schumaker int nfs_check_flags(int); 301ce4ef7c0SBryan Schumaker int nfs_setlease(struct file *, long, struct file_lock **); 302ce4ef7c0SBryan Schumaker 303f7b422b1SDavid Howells /* inode.c */ 3045746006fSTrond Myklebust extern struct workqueue_struct *nfsiod_workqueue; 305f7b422b1SDavid Howells extern struct inode *nfs_alloc_inode(struct super_block *sb); 306f7b422b1SDavid Howells extern void nfs_destroy_inode(struct inode *); 307a9185b41SChristoph Hellwig extern int nfs_write_inode(struct inode *, struct writeback_control *); 308eed99357STrond Myklebust extern int nfs_drop_inode(struct inode *); 30919d87ca3SBryan Schumaker extern void nfs_clear_inode(struct inode *); 310b57922d9SAl Viro extern void nfs_evict_inode(struct inode *); 311f41f7418STrond Myklebust void nfs_zap_acl_cache(struct inode *inode); 31272cb77f4STrond Myklebust extern int nfs_wait_bit_killable(void *word); 313f7b422b1SDavid Howells 314f7b422b1SDavid Howells /* super.c */ 3156a74490dSBryan Schumaker extern const struct super_operations nfs_sops; 316ab7017a3SBryan Schumaker extern struct file_system_type nfs_fs_type; 31754ceac45SDavid Howells extern struct file_system_type nfs_xdev_fs_type; 31889d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 31954ceac45SDavid Howells extern struct file_system_type nfs4_xdev_fs_type; 32054ceac45SDavid Howells extern struct file_system_type nfs4_referral_fs_type; 321f7b422b1SDavid Howells #endif 322ff9099f2SBryan Schumaker struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, 323ff9099f2SBryan Schumaker struct nfs_subversion *); 324fbdefd64SBryan Schumaker void nfs_initialise_sb(struct super_block *); 325fbdefd64SBryan Schumaker int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); 326fbdefd64SBryan Schumaker int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); 327ab7017a3SBryan Schumaker struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *, 328ab7017a3SBryan Schumaker struct nfs_mount_info *, struct nfs_subversion *); 329fbdefd64SBryan Schumaker struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); 330fbdefd64SBryan Schumaker struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, 331fbdefd64SBryan Schumaker const char *, struct nfs_mount_info *); 332fbdefd64SBryan Schumaker void nfs_kill_super(struct super_block *); 333fbdefd64SBryan Schumaker void nfs_fill_super(struct super_block *, struct nfs_mount_info *); 3344ebd9ab3SDominik Hackl 335f7b422b1SDavid Howells extern struct rpc_stat nfs_rpcstat; 3364ebd9ab3SDominik Hackl 337f7b422b1SDavid Howells extern int __init register_nfs_fs(void); 338f7b422b1SDavid Howells extern void __exit unregister_nfs_fs(void); 3391daef0a8STrond Myklebust extern void nfs_sb_active(struct super_block *sb); 3401daef0a8STrond Myklebust extern void nfs_sb_deactive(struct super_block *sb); 341f7b422b1SDavid Howells 342f7b422b1SDavid Howells /* namespace.c */ 34397a54868SBen Hutchings #define NFS_PATH_CANONICAL 1 344b514f872SAl Viro extern char *nfs_path(char **p, struct dentry *dentry, 34597a54868SBen Hutchings char *buffer, ssize_t buflen, unsigned flags); 34636d43a43SDavid Howells extern struct vfsmount *nfs_d_automount(struct path *path); 347281cad46SBryan Schumaker struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, 348281cad46SBryan Schumaker struct nfs_fh *, struct nfs_fattr *); 349281cad46SBryan Schumaker struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, 350281cad46SBryan Schumaker struct nfs_fattr *, rpc_authflavor_t); 351f7b422b1SDavid Howells 35254ceac45SDavid Howells /* getroot.c */ 3530d5839adSAl Viro extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, 3540d5839adSAl Viro const char *); 35589d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 3560d5839adSAl Viro extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, 3570d5839adSAl Viro const char *); 35854ceac45SDavid Howells 359815409d2STrond Myklebust extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh); 3607d4e2747SDavid Howells #endif 361f7b422b1SDavid Howells 362061ae2edSFred Isaman struct nfs_pgio_completion_ops; 363f11c88afSAndy Adamson /* read.c */ 3644db6e0b7SFred Isaman extern struct nfs_read_header *nfs_readhdr_alloc(void); 365cd841605SFred Isaman extern void nfs_readhdr_free(struct nfs_pgio_header *hdr); 366584aa810SFred Isaman extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 367584aa810SFred Isaman struct inode *inode, 368584aa810SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 369c5996c4eSFred Isaman extern int nfs_initiate_read(struct rpc_clnt *clnt, 370c5996c4eSFred Isaman struct nfs_read_data *data, 3719f0ec176SAndy Adamson const struct rpc_call_ops *call_ops, int flags); 372f11c88afSAndy Adamson extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 373493292ddSTrond Myklebust extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc, 3744db6e0b7SFred Isaman struct nfs_pgio_header *hdr); 375493292ddSTrond Myklebust extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 376493292ddSTrond Myklebust extern void nfs_readdata_release(struct nfs_read_data *rdata); 377e885de1aSTrond Myklebust 378fbdefd64SBryan Schumaker /* super.c */ 379fbdefd64SBryan Schumaker void nfs_clone_super(struct super_block *, struct nfs_mount_info *); 380fbdefd64SBryan Schumaker void nfs_umount_begin(struct super_block *); 381fbdefd64SBryan Schumaker int nfs_statfs(struct dentry *, struct kstatfs *); 382fbdefd64SBryan Schumaker int nfs_show_options(struct seq_file *, struct dentry *); 383fbdefd64SBryan Schumaker int nfs_show_devname(struct seq_file *, struct dentry *); 384fbdefd64SBryan Schumaker int nfs_show_path(struct seq_file *, struct dentry *); 385fbdefd64SBryan Schumaker int nfs_show_stats(struct seq_file *, struct dentry *); 386fbdefd64SBryan Schumaker void nfs_put_super(struct super_block *); 387fbdefd64SBryan Schumaker int nfs_remount(struct super_block *sb, int *flags, char *raw_data); 388fbdefd64SBryan Schumaker 389def6ed7eSAndy Adamson /* write.c */ 3901763da12SFred Isaman extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 3911763da12SFred Isaman struct inode *inode, int ioflags, 3921763da12SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 3936c75dc0dSFred Isaman extern struct nfs_write_header *nfs_writehdr_alloc(void); 394cd841605SFred Isaman extern void nfs_writehdr_free(struct nfs_pgio_header *hdr); 395dce81290STrond Myklebust extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc, 3966c75dc0dSFred Isaman struct nfs_pgio_header *hdr); 397dce81290STrond Myklebust extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 398dce81290STrond Myklebust extern void nfs_writedata_release(struct nfs_write_data *wdata); 3990b7c0153SFred Isaman extern void nfs_commit_free(struct nfs_commit_data *p); 400c5996c4eSFred Isaman extern int nfs_initiate_write(struct rpc_clnt *clnt, 401c5996c4eSFred Isaman struct nfs_write_data *data, 402a69aef14SFred Isaman const struct rpc_call_ops *call_ops, 4039f0ec176SAndy Adamson int how, int flags); 404def6ed7eSAndy Adamson extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 4050b7c0153SFred Isaman extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 4060b7c0153SFred Isaman extern int nfs_initiate_commit(struct rpc_clnt *clnt, 4070b7c0153SFred Isaman struct nfs_commit_data *data, 408e0c2b380SFred Isaman const struct rpc_call_ops *call_ops, 4099f0ec176SAndy Adamson int how, int flags); 4100b7c0153SFred Isaman extern void nfs_init_commit(struct nfs_commit_data *data, 411e0c2b380SFred Isaman struct list_head *head, 412f453a54aSFred Isaman struct pnfs_layout_segment *lseg, 413f453a54aSFred Isaman struct nfs_commit_info *cinfo); 4141763da12SFred Isaman int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 4151763da12SFred Isaman struct nfs_commit_info *cinfo, int max); 4161763da12SFred Isaman int nfs_scan_commit(struct inode *inode, struct list_head *dst, 4171763da12SFred Isaman struct nfs_commit_info *cinfo); 4181763da12SFred Isaman void nfs_mark_request_commit(struct nfs_page *req, 4191763da12SFred Isaman struct pnfs_layout_segment *lseg, 4201763da12SFred Isaman struct nfs_commit_info *cinfo); 4211763da12SFred Isaman int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 4221763da12SFred Isaman int how, struct nfs_commit_info *cinfo); 423e0c2b380SFred Isaman void nfs_retry_commit(struct list_head *page_list, 424ea2cf228SFred Isaman struct pnfs_layout_segment *lseg, 425ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 4260b7c0153SFred Isaman void nfs_commitdata_release(struct nfs_commit_data *data); 427ea2cf228SFred Isaman void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst, 428ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 429ea2cf228SFred Isaman void nfs_request_remove_commit_list(struct nfs_page *req, 430ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 431ea2cf228SFred Isaman void nfs_init_cinfo(struct nfs_commit_info *cinfo, 432ea2cf228SFred Isaman struct inode *inode, 433ea2cf228SFred Isaman struct nfs_direct_req *dreq); 434dc24826bSAndy Adamson int nfs_key_timeout_notify(struct file *filp, struct inode *inode); 435dc24826bSAndy Adamson bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx); 436e0c2b380SFred Isaman 437074cc1deSTrond Myklebust #ifdef CONFIG_MIGRATION 438074cc1deSTrond Myklebust extern int nfs_migrate_page(struct address_space *, 439a6bc32b8SMel Gorman struct page *, struct page *, enum migrate_mode); 440074cc1deSTrond Myklebust #else 441074cc1deSTrond Myklebust #define nfs_migrate_page NULL 442074cc1deSTrond Myklebust #endif 443def6ed7eSAndy Adamson 4441763da12SFred Isaman /* direct.c */ 4451763da12SFred Isaman void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, 4461763da12SFred Isaman struct nfs_direct_req *dreq); 4471d59d61fSTrond Myklebust static inline void nfs_inode_dio_wait(struct inode *inode) 4481d59d61fSTrond Myklebust { 4491d59d61fSTrond Myklebust inode_dio_wait(inode); 4501d59d61fSTrond Myklebust } 4516296556fSPeng Tao extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); 4521763da12SFred Isaman 453cccef3b9SAndy Adamson /* nfs4proc.c */ 454d20581aaSBenny Halevy extern void __nfs4_read_done_cb(struct nfs_read_data *); 4558cab4c39SChuck Lever extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 45645a52a02SAndy Adamson const struct rpc_timeout *timeparms, 457f8407299SAndy Adamson const char *ip_addr); 45805f4c350SChuck Lever extern int nfs40_walk_client_list(struct nfs_client *clp, 45905f4c350SChuck Lever struct nfs_client **result, 46005f4c350SChuck Lever struct rpc_cred *cred); 46105f4c350SChuck Lever extern int nfs41_walk_client_list(struct nfs_client *clp, 46205f4c350SChuck Lever struct nfs_client **result, 46305f4c350SChuck Lever struct rpc_cred *cred); 464cccef3b9SAndy Adamson 465557134a3SAndy Adamson /* 466f7b422b1SDavid Howells * Determine the device name as a string 467f7b422b1SDavid Howells */ 468b514f872SAl Viro static inline char *nfs_devname(struct dentry *dentry, 469f7b422b1SDavid Howells char *buffer, ssize_t buflen) 470f7b422b1SDavid Howells { 471b514f872SAl Viro char *dummy; 47297a54868SBen Hutchings return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); 473f7b422b1SDavid Howells } 474f7b422b1SDavid Howells 475f7b422b1SDavid Howells /* 476f7b422b1SDavid Howells * Determine the actual block size (and log2 thereof) 477f7b422b1SDavid Howells */ 478f7b422b1SDavid Howells static inline 479f7b422b1SDavid Howells unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 480f7b422b1SDavid Howells { 481f7b422b1SDavid Howells /* make sure blocksize is a power of two */ 482f7b422b1SDavid Howells if ((bsize & (bsize - 1)) || nrbitsp) { 483f7b422b1SDavid Howells unsigned char nrbits; 484f7b422b1SDavid Howells 485f7b422b1SDavid Howells for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 486f7b422b1SDavid Howells ; 487f7b422b1SDavid Howells bsize = 1 << nrbits; 488f7b422b1SDavid Howells if (nrbitsp) 489f7b422b1SDavid Howells *nrbitsp = nrbits; 490f7b422b1SDavid Howells } 491f7b422b1SDavid Howells 492f7b422b1SDavid Howells return bsize; 493f7b422b1SDavid Howells } 494f7b422b1SDavid Howells 495f7b422b1SDavid Howells /* 496f7b422b1SDavid Howells * Calculate the number of 512byte blocks used. 497f7b422b1SDavid Howells */ 4989eaa67c6SChuck Lever static inline blkcnt_t nfs_calc_block_size(u64 tsize) 499f7b422b1SDavid Howells { 5009eaa67c6SChuck Lever blkcnt_t used = (tsize + 511) >> 9; 501f7b422b1SDavid Howells return (used > ULONG_MAX) ? ULONG_MAX : used; 502f7b422b1SDavid Howells } 503f7b422b1SDavid Howells 504f7b422b1SDavid Howells /* 505f7b422b1SDavid Howells * Compute and set NFS server blocksize 506f7b422b1SDavid Howells */ 507f7b422b1SDavid Howells static inline 508f7b422b1SDavid Howells unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 509f7b422b1SDavid Howells { 510f7b422b1SDavid Howells if (bsize < NFS_MIN_FILE_IO_SIZE) 511f7b422b1SDavid Howells bsize = NFS_DEF_FILE_IO_SIZE; 512f7b422b1SDavid Howells else if (bsize >= NFS_MAX_FILE_IO_SIZE) 513f7b422b1SDavid Howells bsize = NFS_MAX_FILE_IO_SIZE; 514f7b422b1SDavid Howells 515f7b422b1SDavid Howells return nfs_block_bits(bsize, nrbitsp); 516f7b422b1SDavid Howells } 517f7b422b1SDavid Howells 518f7b422b1SDavid Howells /* 519f7b422b1SDavid Howells * Determine the maximum file size for a superblock 520f7b422b1SDavid Howells */ 521f7b422b1SDavid Howells static inline 522f7b422b1SDavid Howells void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 523f7b422b1SDavid Howells { 524f7b422b1SDavid Howells sb->s_maxbytes = (loff_t)maxfilesize; 525f7b422b1SDavid Howells if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 526f7b422b1SDavid Howells sb->s_maxbytes = MAX_LFS_FILESIZE; 527f7b422b1SDavid Howells } 52849a70f27STrond Myklebust 52949a70f27STrond Myklebust /* 53049a70f27STrond Myklebust * Determine the number of bytes of data the page contains 53149a70f27STrond Myklebust */ 53249a70f27STrond Myklebust static inline 53349a70f27STrond Myklebust unsigned int nfs_page_length(struct page *page) 53449a70f27STrond Myklebust { 535d56b4ddfSMel Gorman loff_t i_size = i_size_read(page_file_mapping(page)->host); 53649a70f27STrond Myklebust 53749a70f27STrond Myklebust if (i_size > 0) { 538d56b4ddfSMel Gorman pgoff_t page_index = page_file_index(page); 53949a70f27STrond Myklebust pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; 540d56b4ddfSMel Gorman if (page_index < end_index) 54149a70f27STrond Myklebust return PAGE_CACHE_SIZE; 542d56b4ddfSMel Gorman if (page_index == end_index) 54349a70f27STrond Myklebust return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1; 54449a70f27STrond Myklebust } 54549a70f27STrond Myklebust return 0; 54649a70f27STrond Myklebust } 5478d5658c9STrond Myklebust 5488d5658c9STrond Myklebust /* 5490b26a0bfSTrond Myklebust * Convert a umode to a dirent->d_type 5500b26a0bfSTrond Myklebust */ 5510b26a0bfSTrond Myklebust static inline 5520b26a0bfSTrond Myklebust unsigned char nfs_umode_to_dtype(umode_t mode) 5530b26a0bfSTrond Myklebust { 5540b26a0bfSTrond Myklebust return (mode >> 12) & 15; 5550b26a0bfSTrond Myklebust } 5560b26a0bfSTrond Myklebust 5570b26a0bfSTrond Myklebust /* 5588d5658c9STrond Myklebust * Determine the number of pages in an array of length 'len' and 5598d5658c9STrond Myklebust * with a base offset of 'base' 5608d5658c9STrond Myklebust */ 5618d5658c9STrond Myklebust static inline 5628d5658c9STrond Myklebust unsigned int nfs_page_array_len(unsigned int base, size_t len) 5638d5658c9STrond Myklebust { 5648d5658c9STrond Myklebust return ((unsigned long)len + (unsigned long)base + 5658d5658c9STrond Myklebust PAGE_SIZE - 1) >> PAGE_SHIFT; 5668d5658c9STrond Myklebust } 5670110ee15STrond Myklebust 5683a1556e8STrond Myklebust /* 5693a1556e8STrond Myklebust * Convert a struct timespec into a 64-bit change attribute 5703a1556e8STrond Myklebust * 5713a1556e8STrond Myklebust * This does approximately the same thing as timespec_to_ns(), 5723a1556e8STrond Myklebust * but for calculation efficiency, we multiply the seconds by 5733a1556e8STrond Myklebust * 1024*1024*1024. 5743a1556e8STrond Myklebust */ 5753a1556e8STrond Myklebust static inline 5763a1556e8STrond Myklebust u64 nfs_timespec_to_change_attr(const struct timespec *ts) 5773a1556e8STrond Myklebust { 5783a1556e8STrond Myklebust return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 5793a1556e8STrond Myklebust } 5801264a2f0STrond Myklebust 5811264a2f0STrond Myklebust #ifdef CONFIG_CRC32 5821264a2f0STrond Myklebust /** 5831264a2f0STrond Myklebust * nfs_fhandle_hash - calculate the crc32 hash for the filehandle 5841264a2f0STrond Myklebust * @fh - pointer to filehandle 5851264a2f0STrond Myklebust * 5861264a2f0STrond Myklebust * returns a crc32 hash for the filehandle that is compatible with 5871264a2f0STrond Myklebust * the one displayed by "wireshark". 5881264a2f0STrond Myklebust */ 5891264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 5901264a2f0STrond Myklebust { 5911264a2f0STrond Myklebust return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); 5921264a2f0STrond Myklebust } 5931264a2f0STrond Myklebust #else 5941264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 5951264a2f0STrond Myklebust { 5961264a2f0STrond Myklebust return 0; 5971264a2f0STrond Myklebust } 5981264a2f0STrond Myklebust #endif 599