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> 1047af81f2SPeng Tao #include <linux/nfs_page.h> 115dd43ce2SIngo Molnar #include <linux/wait_bit.h> 12f7b422b1SDavid Howells 131751e8a6SLinus Torvalds #define NFS_MS_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS) 1408734048SDavid Howells 1520fa1902SPeng Tao extern const struct export_operations nfs_export_ops; 1620fa1902SPeng Tao 1754ceac45SDavid Howells struct nfs_string; 1854ceac45SDavid Howells 1954ceac45SDavid Howells /* Maximum number of readahead requests 2054ceac45SDavid Howells * FIXME: this should really be a sysctl so that users may tune it to suit 2154ceac45SDavid Howells * their needs. People that do NFS over a slow network, might for 2254ceac45SDavid Howells * instance want to reduce it to something closer to 1 for improved 2354ceac45SDavid Howells * interactive response. 2454ceac45SDavid Howells */ 2554ceac45SDavid Howells #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) 2654ceac45SDavid Howells 277ebb9315SBryan Schumaker static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) 287ebb9315SBryan Schumaker { 297ebb9315SBryan Schumaker if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid)) 307ebb9315SBryan Schumaker fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT; 317ebb9315SBryan Schumaker } 327ebb9315SBryan Schumaker 33533eb461SAndy Adamson static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) 34533eb461SAndy Adamson { 35533eb461SAndy Adamson if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) || 36533eb461SAndy Adamson (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) && 37533eb461SAndy Adamson ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0))) 38533eb461SAndy Adamson return 0; 39533eb461SAndy Adamson return 1; 40533eb461SAndy Adamson } 41533eb461SAndy Adamson 42f7b422b1SDavid Howells struct nfs_clone_mount { 43f7b422b1SDavid Howells const struct super_block *sb; 44f7b422b1SDavid Howells const struct dentry *dentry; 45f7b422b1SDavid Howells struct nfs_fh *fh; 46f7b422b1SDavid Howells struct nfs_fattr *fattr; 47f7b422b1SDavid Howells char *hostname; 48f7b422b1SDavid Howells char *mnt_path; 496677d095SChuck Lever struct sockaddr *addr; 506677d095SChuck Lever size_t addrlen; 51f7b422b1SDavid Howells rpc_authflavor_t authflavor; 52f7b422b1SDavid Howells }; 53f7b422b1SDavid Howells 546b18eaa0S\"Talpey, Thomas\ /* 55a14017dbSChuck Lever * Note: RFC 1813 doesn't limit the number of auth flavors that 56a14017dbSChuck Lever * a server can return, so make something up. 57a14017dbSChuck Lever */ 58a14017dbSChuck Lever #define NFS_MAX_SECFLAVORS (12) 59a14017dbSChuck Lever 60a14017dbSChuck Lever /* 614cfd74fcSChuck Lever * Value used if the user did not specify a port value. 624cfd74fcSChuck Lever */ 634cfd74fcSChuck Lever #define NFS_UNSPEC_PORT (-1) 644cfd74fcSChuck Lever 65a956bedaSTrond Myklebust #define NFS_UNSPEC_RETRANS (UINT_MAX) 66a956bedaSTrond Myklebust #define NFS_UNSPEC_TIMEO (UINT_MAX) 67a956bedaSTrond Myklebust 684cfd74fcSChuck Lever /* 6956e4ebf8SBryan Schumaker * Maximum number of pages that readdir can use for creating 7056e4ebf8SBryan Schumaker * a vmapped array of pages. 7156e4ebf8SBryan Schumaker */ 7256e4ebf8SBryan Schumaker #define NFS_MAX_READDIR_PAGES 8 7356e4ebf8SBryan Schumaker 74fcf10398SBryan Schumaker struct nfs_client_initdata { 75fcf10398SBryan Schumaker unsigned long init_flags; 765c6e5b60STrond Myklebust const char *hostname; /* Hostname of the server */ 775c6e5b60STrond Myklebust const struct sockaddr *addr; /* Address of the server */ 785c6e5b60STrond Myklebust const char *nodename; /* Hostname of the client */ 795c6e5b60STrond Myklebust const char *ip_addr; /* IP address of the client */ 80fcf10398SBryan Schumaker size_t addrlen; 81ab7017a3SBryan Schumaker struct nfs_subversion *nfs_mod; 82fcf10398SBryan Schumaker int proto; 83fcf10398SBryan Schumaker u32 minorversion; 84fcf10398SBryan Schumaker struct net *net; 855c6e5b60STrond Myklebust const struct rpc_timeout *timeparms; 86fcf10398SBryan Schumaker }; 87fcf10398SBryan Schumaker 8856e4ebf8SBryan Schumaker /* 896b18eaa0S\"Talpey, Thomas\ * In-kernel mount arguments 906b18eaa0S\"Talpey, Thomas\ */ 916b18eaa0S\"Talpey, Thomas\ struct nfs_parsed_mount_data { 926b18eaa0S\"Talpey, Thomas\ int flags; 938cb7f74eSChuck Lever unsigned int rsize, wsize; 948cb7f74eSChuck Lever unsigned int timeo, retrans; 958cb7f74eSChuck Lever unsigned int acregmin, acregmax, 966b18eaa0S\"Talpey, Thomas\ acdirmin, acdirmax; 978cb7f74eSChuck Lever unsigned int namlen; 98b797cac7SDavid Howells unsigned int options; 996b18eaa0S\"Talpey, Thomas\ unsigned int bsize; 100a3f73c27SWeston Andros Adamson struct nfs_auth_info auth_info; 101a3f73c27SWeston Andros Adamson rpc_authflavor_t selected_flavor; 1026b18eaa0S\"Talpey, Thomas\ char *client_address; 103764302ccSChuck Lever unsigned int version; 1043fd5be9eSMike Sager unsigned int minorversion; 10508734048SDavid Howells char *fscache_uniq; 106b72e4f42SBryan Schumaker bool need_mount; 1076b18eaa0S\"Talpey, Thomas\ 1086b18eaa0S\"Talpey, Thomas\ struct { 1094c568017SChuck Lever struct sockaddr_storage address; 1104c568017SChuck Lever size_t addrlen; 1116b18eaa0S\"Talpey, Thomas\ char *hostname; 11278fa701fSChuck Lever u32 version; 1134cfd74fcSChuck Lever int port; 11478fa701fSChuck Lever unsigned short protocol; 1156b18eaa0S\"Talpey, Thomas\ } mount_server; 1166b18eaa0S\"Talpey, Thomas\ 1176b18eaa0S\"Talpey, Thomas\ struct { 1184c568017SChuck Lever struct sockaddr_storage address; 1194c568017SChuck Lever size_t addrlen; 1206b18eaa0S\"Talpey, Thomas\ char *hostname; 1216b18eaa0S\"Talpey, Thomas\ char *export_path; 1224cfd74fcSChuck Lever int port; 12378fa701fSChuck Lever unsigned short protocol; 1246b18eaa0S\"Talpey, Thomas\ } nfs_server; 125f9c3a380SEric Paris 126f9c3a380SEric Paris struct security_mnt_opts lsm_opts; 127e50a7a1aSStanislav Kinsbursky struct net *net; 1286b18eaa0S\"Talpey, Thomas\ }; 1296b18eaa0S\"Talpey, Thomas\ 130146ec944SChuck Lever /* mount_clnt.c */ 131c5d120f8SChuck Lever struct nfs_mount_request { 132c5d120f8SChuck Lever struct sockaddr *sap; 133c5d120f8SChuck Lever size_t salen; 134c5d120f8SChuck Lever char *hostname; 135c5d120f8SChuck Lever char *dirpath; 136c5d120f8SChuck Lever u32 version; 137c5d120f8SChuck Lever unsigned short protocol; 138c5d120f8SChuck Lever struct nfs_fh *fh; 13950a737f8SChuck Lever int noresvport; 1408e02f6b9SChuck Lever unsigned int *auth_flav_len; 1418e02f6b9SChuck Lever rpc_authflavor_t *auth_flavs; 1426d59b8d5SStanislav Kinsbursky struct net *net; 143c5d120f8SChuck Lever }; 144c5d120f8SChuck Lever 145fbdefd64SBryan Schumaker struct nfs_mount_info { 146fbdefd64SBryan Schumaker void (*fill_super)(struct super_block *, struct nfs_mount_info *); 147fbdefd64SBryan Schumaker int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); 148fbdefd64SBryan Schumaker struct nfs_parsed_mount_data *parsed; 149fbdefd64SBryan Schumaker struct nfs_clone_mount *cloned; 150fbdefd64SBryan Schumaker struct nfs_fh *mntfh; 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); 1596663ee7fSBryan Schumaker extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); 1605c6e5b60STrond Myklebust int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t); 1617d38de3fSAnna Schumaker struct nfs_client *nfs_get_client(const struct nfs_client_initdata *); 162fcf10398SBryan Schumaker int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); 163fcf10398SBryan Schumaker void nfs_server_insert_lists(struct nfs_server *); 16432e62b7cSChuck Lever void nfs_server_remove_lists(struct nfs_server *); 165a956bedaSTrond Myklebust void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans); 166fcf10398SBryan Schumaker int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, 167fcf10398SBryan Schumaker rpc_authflavor_t); 168fcf10398SBryan Schumaker struct nfs_server *nfs_alloc_server(void); 169fcf10398SBryan Schumaker void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); 17054ceac45SDavid Howells 17128cd1b3fSStanislav Kinsbursky extern void nfs_cleanup_cb_ident_idr(struct net *); 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); 1781179acc6SBryan Schumaker extern struct nfs_server *nfs_create_server(struct nfs_mount_info *, 179ab7017a3SBryan Schumaker struct nfs_subversion *); 18091ea40b9S\"Talpey, Thomas\ extern struct nfs_server *nfs4_create_server( 1811179acc6SBryan Schumaker struct nfs_mount_info *, 1821179acc6SBryan Schumaker struct nfs_subversion *); 18354ceac45SDavid Howells extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, 18454ceac45SDavid Howells struct nfs_fh *); 18532e62b7cSChuck Lever extern int nfs4_update_server(struct nfs_server *server, const char *hostname, 186292f503cSTrond Myklebust struct sockaddr *sap, size_t salen, 187292f503cSTrond Myklebust struct net *net); 18854ceac45SDavid Howells extern void nfs_free_server(struct nfs_server *server); 18954ceac45SDavid Howells extern struct nfs_server *nfs_clone_server(struct nfs_server *, 19054ceac45SDavid Howells struct nfs_fh *, 1917e6eb683SBryan Schumaker struct nfs_fattr *, 1927e6eb683SBryan Schumaker rpc_authflavor_t); 193a33e4b03SWeston Andros Adamson extern bool nfs_client_init_is_complete(const struct nfs_client *clp); 194a33e4b03SWeston Andros Adamson extern int nfs_client_init_status(const struct nfs_client *clp); 1954697bd5eSTrond Myklebust extern int nfs_wait_client_init_complete(const struct nfs_client *clp); 19676db6d95SAndy Adamson extern void nfs_mark_client_ready(struct nfs_client *clp, int state); 1973fc75f12STigran Mkrtchyan extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, 198d83217c1SAndy Adamson const struct sockaddr *ds_addr, 19998fc685aSAndy Adamson int ds_addrlen, int ds_proto, 20098fc685aSAndy Adamson unsigned int ds_timeo, 201064172f3SPeng Tao unsigned int ds_retrans, 2027d38de3fSAnna Schumaker u32 minor_version); 2030e20162eSAndy Adamson extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, 2040e20162eSAndy Adamson struct inode *); 205b224f7cbSTigran Mkrtchyan extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, 2061a04c6e1SPeng Tao const struct sockaddr *ds_addr, int ds_addrlen, 2071a04c6e1SPeng Tao int ds_proto, unsigned int ds_timeo, 2087d38de3fSAnna Schumaker unsigned int ds_retrans); 2096aaca566SDavid Howells #ifdef CONFIG_PROC_FS 2106aaca566SDavid Howells extern int __init nfs_fs_proc_init(void); 2116aaca566SDavid Howells extern void nfs_fs_proc_exit(void); 21265b38851SEric W. Biederman extern int nfs_fs_proc_net_init(struct net *net); 21365b38851SEric W. Biederman extern void nfs_fs_proc_net_exit(struct net *net); 2146aaca566SDavid Howells #else 21565b38851SEric W. Biederman static inline int nfs_fs_proc_net_init(struct net *net) 21665b38851SEric W. Biederman { 21765b38851SEric W. Biederman return 0; 21865b38851SEric W. Biederman } 21965b38851SEric W. Biederman static inline void nfs_fs_proc_net_exit(struct net *net) 22065b38851SEric W. Biederman { 22165b38851SEric W. Biederman } 2226aaca566SDavid Howells static inline int nfs_fs_proc_init(void) 2236aaca566SDavid Howells { 2246aaca566SDavid Howells return 0; 2256aaca566SDavid Howells } 2266aaca566SDavid Howells static inline void nfs_fs_proc_exit(void) 2276aaca566SDavid Howells { 2286aaca566SDavid Howells } 2296aaca566SDavid Howells #endif 23024c8dbbbSDavid Howells 231f7b422b1SDavid Howells /* callback_xdr.c */ 232e9679189SChristoph Hellwig extern const struct svc_version nfs4_callback_version1; 233e9679189SChristoph Hellwig extern const struct svc_version nfs4_callback_version4; 234f7b422b1SDavid Howells 2354db6e0b7SFred Isaman struct nfs_pageio_descriptor; 236f7b422b1SDavid Howells /* pagelist.c */ 237f7b422b1SDavid Howells extern int __init nfs_init_nfspagecache(void); 238266bee88SDavid Brownell extern void nfs_destroy_nfspagecache(void); 239f7b422b1SDavid Howells extern int __init nfs_init_readpagecache(void); 240266bee88SDavid Brownell extern void nfs_destroy_readpagecache(void); 241f7b422b1SDavid Howells extern int __init nfs_init_writepagecache(void); 242266bee88SDavid Brownell extern void nfs_destroy_writepagecache(void); 243f7b422b1SDavid Howells 244f7b422b1SDavid Howells extern int __init nfs_init_directcache(void); 245266bee88SDavid Brownell extern void nfs_destroy_directcache(void); 2464db6e0b7SFred Isaman extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 2474db6e0b7SFred Isaman struct nfs_pgio_header *hdr, 2484db6e0b7SFred Isaman void (*release)(struct nfs_pgio_header *hdr)); 2494db6e0b7SFred Isaman void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 250210c7c17SBenjamin Coddington int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); 251577b4232STrond Myklebust 25241d8d5b7SAnna Schumaker extern const struct nfs_pageio_ops nfs_pgio_rw_ops; 2531e7f3a48SWeston Andros Adamson struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); 2541e7f3a48SWeston Andros Adamson void nfs_pgio_header_free(struct nfs_pgio_header *); 255ef2c488cSAnna Schumaker int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); 25646a5ab47SPeng Tao int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, 25746a5ab47SPeng Tao struct rpc_cred *cred, const struct nfs_rpc_ops *rpc_ops, 25846a5ab47SPeng Tao const struct rpc_call_ops *call_ops, int how, int flags); 259d4581383SWeston Andros Adamson void nfs_free_request(struct nfs_page *req); 26048d635f1SPeng Tao struct nfs_pgio_mirror * 26148d635f1SPeng Tao nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); 26200bfa30aSAnna Schumaker 26347af81f2SPeng Tao static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc) 26447af81f2SPeng Tao { 26547af81f2SPeng Tao WARN_ON_ONCE(desc->pg_mirror_count < 1); 26647af81f2SPeng Tao return desc->pg_mirror_count > 1; 26747af81f2SPeng Tao } 26847af81f2SPeng Tao 269138a2935STrond Myklebust static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, 270138a2935STrond Myklebust const struct nfs_open_context *ctx2) 271138a2935STrond Myklebust { 272138a2935STrond Myklebust return ctx1->cred == ctx2->cred && ctx1->state == ctx2->state; 273138a2935STrond Myklebust } 274138a2935STrond Myklebust 275f7b422b1SDavid Howells /* nfs2xdr.c */ 276499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs_procedures[]; 277573c4e1eSChuck Lever extern int nfs2_decode_dirent(struct xdr_stream *, 278a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 279f7b422b1SDavid Howells 280f7b422b1SDavid Howells /* nfs3xdr.c */ 281499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs3_procedures[]; 282573c4e1eSChuck Lever extern int nfs3_decode_dirent(struct xdr_stream *, 283a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 284f7b422b1SDavid Howells 285f7b422b1SDavid Howells /* nfs4xdr.c */ 28689d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 287573c4e1eSChuck Lever extern int nfs4_decode_dirent(struct xdr_stream *, 288a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 2897d4e2747SDavid Howells #endif 2902449ea2eSAlexandros Batsakis #ifdef CONFIG_NFS_V4_1 2912449ea2eSAlexandros Batsakis extern const u32 nfs41_maxread_overhead; 2922449ea2eSAlexandros Batsakis extern const u32 nfs41_maxwrite_overhead; 293f1c097beSAndy Adamson extern const u32 nfs41_maxgetdevinfo_overhead; 2942449ea2eSAlexandros Batsakis #endif 295f7b422b1SDavid Howells 296f7b422b1SDavid Howells /* nfs4proc.c */ 29789d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 298499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs4_procedures[]; 299d75d5414SAndrew Morton #endif 300f7b422b1SDavid Howells 301694e096fSAnna Schumaker #ifdef CONFIG_NFS_V4_SECURITY_LABEL 302694e096fSAnna Schumaker extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); 303a49c2691SKinglong Mee static inline struct nfs4_label * 304a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 305a49c2691SKinglong Mee { 306a49c2691SKinglong Mee if (!dst || !src) 307a49c2691SKinglong Mee return NULL; 308a49c2691SKinglong Mee 309a49c2691SKinglong Mee if (src->len > NFS4_MAXLABELLEN) 310a49c2691SKinglong Mee return NULL; 311a49c2691SKinglong Mee 312a49c2691SKinglong Mee dst->lfs = src->lfs; 313a49c2691SKinglong Mee dst->pi = src->pi; 314a49c2691SKinglong Mee dst->len = src->len; 315a49c2691SKinglong Mee memcpy(dst->label, src->label, src->len); 316a49c2691SKinglong Mee 317a49c2691SKinglong Mee return dst; 318a49c2691SKinglong Mee } 319694e096fSAnna Schumaker static inline void nfs4_label_free(struct nfs4_label *label) 320694e096fSAnna Schumaker { 321694e096fSAnna Schumaker if (label) { 322694e096fSAnna Schumaker kfree(label->label); 323694e096fSAnna Schumaker kfree(label); 324694e096fSAnna Schumaker } 325694e096fSAnna Schumaker return; 326694e096fSAnna Schumaker } 327fd1defc2STrond Myklebust 328fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 329fd1defc2STrond Myklebust { 330fd1defc2STrond Myklebust if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) 331fd1defc2STrond Myklebust nfsi->cache_validity |= NFS_INO_INVALID_LABEL; 332fd1defc2STrond Myklebust } 333694e096fSAnna Schumaker #else 334694e096fSAnna Schumaker static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } 335694e096fSAnna Schumaker static inline void nfs4_label_free(void *label) {} 336fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 337fd1defc2STrond Myklebust { 338fd1defc2STrond Myklebust } 339a49c2691SKinglong Mee static inline struct nfs4_label * 340a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 341a49c2691SKinglong Mee { 342a49c2691SKinglong Mee return NULL; 343a49c2691SKinglong Mee } 344694e096fSAnna Schumaker #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 345694e096fSAnna Schumaker 3467fe5c398STrond Myklebust /* proc.c */ 3477fe5c398STrond Myklebust void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 3488cab4c39SChuck Lever extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 3495c6e5b60STrond Myklebust const struct nfs_client_initdata *); 3507fe5c398STrond Myklebust 351979df72eSTrond Myklebust /* dir.c */ 3521bcf4c5cSTrond Myklebust extern void nfs_advise_use_readdirplus(struct inode *dir); 353311324adSTrond Myklebust extern void nfs_force_use_readdirplus(struct inode *dir); 3541ab6c499SDave Chinner extern unsigned long nfs_access_cache_count(struct shrinker *shrink, 3551ab6c499SDave Chinner struct shrink_control *sc); 3561ab6c499SDave Chinner extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, 3571495f230SYing Han struct shrink_control *sc); 358597d9289SBryan Schumaker struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 359597d9289SBryan Schumaker int nfs_create(struct inode *, struct dentry *, umode_t, bool); 360597d9289SBryan Schumaker int nfs_mkdir(struct inode *, struct dentry *, umode_t); 361597d9289SBryan Schumaker int nfs_rmdir(struct inode *, struct dentry *); 362597d9289SBryan Schumaker int nfs_unlink(struct inode *, struct dentry *); 363597d9289SBryan Schumaker int nfs_symlink(struct inode *, struct dentry *, const char *); 364597d9289SBryan Schumaker int nfs_link(struct dentry *, struct inode *, struct dentry *); 365597d9289SBryan Schumaker int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); 3661cd66c93SMiklos Szeredi int nfs_rename(struct inode *, struct dentry *, 3671cd66c93SMiklos Szeredi struct inode *, struct dentry *, unsigned int); 368979df72eSTrond Myklebust 369ce4ef7c0SBryan Schumaker /* file.c */ 3704ff79bc7SChristoph Hellwig int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 371ce4ef7c0SBryan Schumaker loff_t nfs_file_llseek(struct file *, loff_t, int); 3723aa2d199SAl Viro ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); 373ce4ef7c0SBryan Schumaker int nfs_file_mmap(struct file *, struct vm_area_struct *); 374edaf4369SAl Viro ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); 375ce4ef7c0SBryan Schumaker int nfs_file_release(struct inode *, struct file *); 376ce4ef7c0SBryan Schumaker int nfs_lock(struct file *, int, struct file_lock *); 377ce4ef7c0SBryan Schumaker int nfs_flock(struct file *, int, struct file_lock *); 378ce4ef7c0SBryan Schumaker int nfs_check_flags(int); 379ce4ef7c0SBryan Schumaker 380f7b422b1SDavid Howells /* inode.c */ 3815746006fSTrond Myklebust extern struct workqueue_struct *nfsiod_workqueue; 382f7b422b1SDavid Howells extern struct inode *nfs_alloc_inode(struct super_block *sb); 383f7b422b1SDavid Howells extern void nfs_destroy_inode(struct inode *); 384a9185b41SChristoph Hellwig extern int nfs_write_inode(struct inode *, struct writeback_control *); 385eed99357STrond Myklebust extern int nfs_drop_inode(struct inode *); 38619d87ca3SBryan Schumaker extern void nfs_clear_inode(struct inode *); 387b57922d9SAl Viro extern void nfs_evict_inode(struct inode *); 388f41f7418STrond Myklebust void nfs_zap_acl_cache(struct inode *inode); 38961540bf6STrond Myklebust extern bool nfs_check_cache_invalid(struct inode *, unsigned long); 390dfd01f02SPeter Zijlstra extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); 3915e4def20SDavid Howells extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode); 392f7b422b1SDavid Howells 393f7b422b1SDavid Howells /* super.c */ 3946a74490dSBryan Schumaker extern const struct super_operations nfs_sops; 395ab7017a3SBryan Schumaker extern struct file_system_type nfs_fs_type; 39654ceac45SDavid Howells extern struct file_system_type nfs_xdev_fs_type; 39789d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 39854ceac45SDavid Howells extern struct file_system_type nfs4_xdev_fs_type; 39954ceac45SDavid Howells extern struct file_system_type nfs4_referral_fs_type; 400f7b422b1SDavid Howells #endif 4014d4b69ddSWeston Andros Adamson bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); 402ff9099f2SBryan Schumaker struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, 403ff9099f2SBryan Schumaker struct nfs_subversion *); 404fbdefd64SBryan Schumaker int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); 405fbdefd64SBryan Schumaker int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); 406ab7017a3SBryan Schumaker struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *, 407ab7017a3SBryan Schumaker struct nfs_mount_info *, struct nfs_subversion *); 408fbdefd64SBryan Schumaker struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); 409fbdefd64SBryan Schumaker struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, 410fbdefd64SBryan Schumaker const char *, struct nfs_mount_info *); 411fbdefd64SBryan Schumaker void nfs_kill_super(struct super_block *); 412fbdefd64SBryan Schumaker void nfs_fill_super(struct super_block *, struct nfs_mount_info *); 4134ebd9ab3SDominik Hackl 414f7b422b1SDavid Howells extern struct rpc_stat nfs_rpcstat; 4154ebd9ab3SDominik Hackl 416f7b422b1SDavid Howells extern int __init register_nfs_fs(void); 417f7b422b1SDavid Howells extern void __exit unregister_nfs_fs(void); 418ea7c38feSTrond Myklebust extern bool nfs_sb_active(struct super_block *sb); 4191daef0a8STrond Myklebust extern void nfs_sb_deactive(struct super_block *sb); 420f7b422b1SDavid Howells 421a5864c99STrond Myklebust /* io.c */ 422a5864c99STrond Myklebust extern void nfs_start_io_read(struct inode *inode); 423a5864c99STrond Myklebust extern void nfs_end_io_read(struct inode *inode); 424a5864c99STrond Myklebust extern void nfs_start_io_write(struct inode *inode); 425a5864c99STrond Myklebust extern void nfs_end_io_write(struct inode *inode); 426a5864c99STrond Myklebust extern void nfs_start_io_direct(struct inode *inode); 427a5864c99STrond Myklebust extern void nfs_end_io_direct(struct inode *inode); 428a5864c99STrond Myklebust 429651b0e70STrond Myklebust static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) 430651b0e70STrond Myklebust { 431651b0e70STrond Myklebust return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0; 432651b0e70STrond Myklebust } 433651b0e70STrond Myklebust 434f7b422b1SDavid Howells /* namespace.c */ 43597a54868SBen Hutchings #define NFS_PATH_CANONICAL 1 436b514f872SAl Viro extern char *nfs_path(char **p, struct dentry *dentry, 43797a54868SBen Hutchings char *buffer, ssize_t buflen, unsigned flags); 43836d43a43SDavid Howells extern struct vfsmount *nfs_d_automount(struct path *path); 439281cad46SBryan Schumaker struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, 440281cad46SBryan Schumaker struct nfs_fh *, struct nfs_fattr *); 441281cad46SBryan Schumaker struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, 442281cad46SBryan Schumaker struct nfs_fattr *, rpc_authflavor_t); 443f7b422b1SDavid Howells 44454ceac45SDavid Howells /* getroot.c */ 4450d5839adSAl Viro extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, 4460d5839adSAl Viro const char *); 44789d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 4480d5839adSAl Viro extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, 4490d5839adSAl Viro const char *); 45054ceac45SDavid Howells 4515e6b1990STrond Myklebust extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); 4527d4e2747SDavid Howells #endif 453f7b422b1SDavid Howells 454061ae2edSFred Isaman struct nfs_pgio_completion_ops; 455f11c88afSAndy Adamson /* read.c */ 456584aa810SFred Isaman extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 457fab5fc25SChristoph Hellwig struct inode *inode, bool force_mds, 458584aa810SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 459f11c88afSAndy Adamson extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 460493292ddSTrond Myklebust extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 461e885de1aSTrond Myklebust 462fbdefd64SBryan Schumaker /* super.c */ 463fbdefd64SBryan Schumaker void nfs_umount_begin(struct super_block *); 464fbdefd64SBryan Schumaker int nfs_statfs(struct dentry *, struct kstatfs *); 465fbdefd64SBryan Schumaker int nfs_show_options(struct seq_file *, struct dentry *); 466fbdefd64SBryan Schumaker int nfs_show_devname(struct seq_file *, struct dentry *); 467fbdefd64SBryan Schumaker int nfs_show_path(struct seq_file *, struct dentry *); 468fbdefd64SBryan Schumaker int nfs_show_stats(struct seq_file *, struct dentry *); 469fbdefd64SBryan Schumaker int nfs_remount(struct super_block *sb, int *flags, char *raw_data); 470fbdefd64SBryan Schumaker 471def6ed7eSAndy Adamson /* write.c */ 4721763da12SFred Isaman extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 473a20c93e3SChristoph Hellwig struct inode *inode, int ioflags, bool force_mds, 4741763da12SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 475dce81290STrond Myklebust extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 4760b7c0153SFred Isaman extern void nfs_commit_free(struct nfs_commit_data *p); 477def6ed7eSAndy Adamson extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 4780b7c0153SFred Isaman extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 4790b7c0153SFred Isaman extern int nfs_initiate_commit(struct rpc_clnt *clnt, 4800b7c0153SFred Isaman struct nfs_commit_data *data, 481c36aae9aSPeng Tao const struct nfs_rpc_ops *nfs_ops, 482e0c2b380SFred Isaman const struct rpc_call_ops *call_ops, 4839f0ec176SAndy Adamson int how, int flags); 4840b7c0153SFred Isaman extern void nfs_init_commit(struct nfs_commit_data *data, 485e0c2b380SFred Isaman struct list_head *head, 486f453a54aSFred Isaman struct pnfs_layout_segment *lseg, 487f453a54aSFred Isaman struct nfs_commit_info *cinfo); 4881763da12SFred Isaman int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 4891763da12SFred Isaman struct nfs_commit_info *cinfo, int max); 490ce59515cSAnna Schumaker unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); 4911763da12SFred Isaman int nfs_scan_commit(struct inode *inode, struct list_head *dst, 4921763da12SFred Isaman struct nfs_commit_info *cinfo); 4931763da12SFred Isaman void nfs_mark_request_commit(struct nfs_page *req, 4941763da12SFred Isaman struct pnfs_layout_segment *lseg, 495b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 496b57ff130SWeston Andros Adamson u32 ds_commit_idx); 497c65e6254SWeston Andros Adamson int nfs_write_need_commit(struct nfs_pgio_header *); 498a08a8cd3STrond Myklebust void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); 4991763da12SFred Isaman int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 5001763da12SFred Isaman int how, struct nfs_commit_info *cinfo); 501e0c2b380SFred Isaman void nfs_retry_commit(struct list_head *page_list, 502ea2cf228SFred Isaman struct pnfs_layout_segment *lseg, 503b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 504b57ff130SWeston Andros Adamson u32 ds_commit_idx); 5050b7c0153SFred Isaman void nfs_commitdata_release(struct nfs_commit_data *data); 5066272dcc6SAnna Schumaker void nfs_request_add_commit_list(struct nfs_page *req, 507ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 50886d80f97STrond Myklebust void nfs_request_add_commit_list_locked(struct nfs_page *req, 50986d80f97STrond Myklebust struct list_head *dst, 51086d80f97STrond Myklebust struct nfs_commit_info *cinfo); 511ea2cf228SFred Isaman void nfs_request_remove_commit_list(struct nfs_page *req, 512ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 513ea2cf228SFred Isaman void nfs_init_cinfo(struct nfs_commit_info *cinfo, 514ea2cf228SFred Isaman struct inode *inode, 515ea2cf228SFred Isaman struct nfs_direct_req *dreq); 516dc24826bSAndy Adamson int nfs_key_timeout_notify(struct file *filp, struct inode *inode); 517ce52914eSScott Mayhew bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode); 518a7d42ddbSWeston Andros Adamson void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); 519e0c2b380SFred Isaman 520837bb1d7STrond Myklebust int nfs_filemap_write_and_wait_range(struct address_space *mapping, 521837bb1d7STrond Myklebust loff_t lstart, loff_t lend); 522837bb1d7STrond Myklebust 523a5314a74STrond Myklebust #ifdef CONFIG_NFS_V4_1 524a5314a74STrond Myklebust static inline 525a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 526a5314a74STrond Myklebust { 527a5314a74STrond Myklebust int i; 528a5314a74STrond Myklebust 529a5314a74STrond Myklebust for (i = 0; i < cinfo->nbuckets; i++) 530a5314a74STrond Myklebust cinfo->buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; 531a5314a74STrond Myklebust } 532a5314a74STrond Myklebust #else 533a5314a74STrond Myklebust static inline 534a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 535a5314a74STrond Myklebust { 536a5314a74STrond Myklebust } 537a5314a74STrond Myklebust #endif 538a5314a74STrond Myklebust 539074cc1deSTrond Myklebust #ifdef CONFIG_MIGRATION 540074cc1deSTrond Myklebust extern int nfs_migrate_page(struct address_space *, 541a6bc32b8SMel Gorman struct page *, struct page *, enum migrate_mode); 542074cc1deSTrond Myklebust #endif 543def6ed7eSAndy Adamson 5448fc3c386STrond Myklebust static inline int 5458fc3c386STrond Myklebust nfs_write_verifier_cmp(const struct nfs_write_verifier *v1, 5468fc3c386STrond Myklebust const struct nfs_write_verifier *v2) 5478fc3c386STrond Myklebust { 5488fc3c386STrond Myklebust return memcmp(v1->data, v2->data, sizeof(v1->data)); 5498fc3c386STrond Myklebust } 5508fc3c386STrond Myklebust 5510e862a40SJeff Layton /* unlink.c */ 5520e862a40SJeff Layton extern struct rpc_task * 5530e862a40SJeff Layton nfs_async_rename(struct inode *old_dir, struct inode *new_dir, 5540e862a40SJeff Layton struct dentry *old_dentry, struct dentry *new_dentry, 5550e862a40SJeff Layton void (*complete)(struct rpc_task *, struct nfs_renamedata *)); 5560e862a40SJeff Layton extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); 5570e862a40SJeff Layton 5581763da12SFred Isaman /* direct.c */ 5591763da12SFred Isaman void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, 5601763da12SFred Isaman struct nfs_direct_req *dreq); 5616296556fSPeng Tao extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); 5621763da12SFred Isaman 563cccef3b9SAndy Adamson /* nfs4proc.c */ 5648cab4c39SChuck Lever extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 5655c6e5b60STrond Myklebust const struct nfs_client_initdata *); 56605f4c350SChuck Lever extern int nfs40_walk_client_list(struct nfs_client *clp, 56705f4c350SChuck Lever struct nfs_client **result, 56805f4c350SChuck Lever struct rpc_cred *cred); 56905f4c350SChuck Lever extern int nfs41_walk_client_list(struct nfs_client *clp, 57005f4c350SChuck Lever struct nfs_client **result, 57105f4c350SChuck Lever struct rpc_cred *cred); 57204fa2c6bSAndy Adamson extern int nfs4_test_session_trunk(struct rpc_clnt *, 57304fa2c6bSAndy Adamson struct rpc_xprt *, 57404fa2c6bSAndy Adamson void *); 575cccef3b9SAndy Adamson 576ea7c38feSTrond Myklebust static inline struct inode *nfs_igrab_and_active(struct inode *inode) 577ea7c38feSTrond Myklebust { 578ea7c38feSTrond Myklebust inode = igrab(inode); 579ea7c38feSTrond Myklebust if (inode != NULL && !nfs_sb_active(inode->i_sb)) { 580ea7c38feSTrond Myklebust iput(inode); 581ea7c38feSTrond Myklebust inode = NULL; 582ea7c38feSTrond Myklebust } 583ea7c38feSTrond Myklebust return inode; 584ea7c38feSTrond Myklebust } 585ea7c38feSTrond Myklebust 586ea7c38feSTrond Myklebust static inline void nfs_iput_and_deactive(struct inode *inode) 587ea7c38feSTrond Myklebust { 588ea7c38feSTrond Myklebust if (inode != NULL) { 589ea7c38feSTrond Myklebust struct super_block *sb = inode->i_sb; 590ea7c38feSTrond Myklebust 591ea7c38feSTrond Myklebust iput(inode); 592ea7c38feSTrond Myklebust nfs_sb_deactive(sb); 593ea7c38feSTrond Myklebust } 594ea7c38feSTrond Myklebust } 595ea7c38feSTrond Myklebust 596557134a3SAndy Adamson /* 597f7b422b1SDavid Howells * Determine the device name as a string 598f7b422b1SDavid Howells */ 599b514f872SAl Viro static inline char *nfs_devname(struct dentry *dentry, 600f7b422b1SDavid Howells char *buffer, ssize_t buflen) 601f7b422b1SDavid Howells { 602b514f872SAl Viro char *dummy; 60397a54868SBen Hutchings return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); 604f7b422b1SDavid Howells } 605f7b422b1SDavid Howells 606f7b422b1SDavid Howells /* 607f7b422b1SDavid Howells * Determine the actual block size (and log2 thereof) 608f7b422b1SDavid Howells */ 609f7b422b1SDavid Howells static inline 610f7b422b1SDavid Howells unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 611f7b422b1SDavid Howells { 612f7b422b1SDavid Howells /* make sure blocksize is a power of two */ 613f7b422b1SDavid Howells if ((bsize & (bsize - 1)) || nrbitsp) { 614f7b422b1SDavid Howells unsigned char nrbits; 615f7b422b1SDavid Howells 616f7b422b1SDavid Howells for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 617f7b422b1SDavid Howells ; 618f7b422b1SDavid Howells bsize = 1 << nrbits; 619f7b422b1SDavid Howells if (nrbitsp) 620f7b422b1SDavid Howells *nrbitsp = nrbits; 621f7b422b1SDavid Howells } 622f7b422b1SDavid Howells 623f7b422b1SDavid Howells return bsize; 624f7b422b1SDavid Howells } 625f7b422b1SDavid Howells 626f7b422b1SDavid Howells /* 627f7b422b1SDavid Howells * Calculate the number of 512byte blocks used. 628f7b422b1SDavid Howells */ 6299eaa67c6SChuck Lever static inline blkcnt_t nfs_calc_block_size(u64 tsize) 630f7b422b1SDavid Howells { 6319eaa67c6SChuck Lever blkcnt_t used = (tsize + 511) >> 9; 632f7b422b1SDavid Howells return (used > ULONG_MAX) ? ULONG_MAX : used; 633f7b422b1SDavid Howells } 634f7b422b1SDavid Howells 635f7b422b1SDavid Howells /* 636f7b422b1SDavid Howells * Compute and set NFS server blocksize 637f7b422b1SDavid Howells */ 638f7b422b1SDavid Howells static inline 639f7b422b1SDavid Howells unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 640f7b422b1SDavid Howells { 641f7b422b1SDavid Howells if (bsize < NFS_MIN_FILE_IO_SIZE) 642f7b422b1SDavid Howells bsize = NFS_DEF_FILE_IO_SIZE; 643f7b422b1SDavid Howells else if (bsize >= NFS_MAX_FILE_IO_SIZE) 644f7b422b1SDavid Howells bsize = NFS_MAX_FILE_IO_SIZE; 645f7b422b1SDavid Howells 646f7b422b1SDavid Howells return nfs_block_bits(bsize, nrbitsp); 647f7b422b1SDavid Howells } 648f7b422b1SDavid Howells 649f7b422b1SDavid Howells /* 650f7b422b1SDavid Howells * Determine the maximum file size for a superblock 651f7b422b1SDavid Howells */ 652f7b422b1SDavid Howells static inline 653f7b422b1SDavid Howells void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 654f7b422b1SDavid Howells { 655f7b422b1SDavid Howells sb->s_maxbytes = (loff_t)maxfilesize; 656f7b422b1SDavid Howells if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 657f7b422b1SDavid Howells sb->s_maxbytes = MAX_LFS_FILESIZE; 658f7b422b1SDavid Howells } 65949a70f27STrond Myklebust 66049a70f27STrond Myklebust /* 661d15bc38dSTom Haynes * Record the page as unstable and mark its inode as dirty. 662d15bc38dSTom Haynes */ 663d15bc38dSTom Haynes static inline 66486d80f97STrond Myklebust void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) 665d15bc38dSTom Haynes { 66686d80f97STrond Myklebust if (!cinfo->dreq) { 667d15bc38dSTom Haynes struct inode *inode = page_file_mapping(page)->host; 668d15bc38dSTom Haynes 66911fb9989SMel Gorman inc_node_page_state(page, NR_UNSTABLE_NFS); 67093f78d88STejun Heo inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE); 671d15bc38dSTom Haynes __mark_inode_dirty(inode, I_DIRTY_DATASYNC); 672d15bc38dSTom Haynes } 67386d80f97STrond Myklebust } 674d15bc38dSTom Haynes 675d15bc38dSTom Haynes /* 67649a70f27STrond Myklebust * Determine the number of bytes of data the page contains 67749a70f27STrond Myklebust */ 67849a70f27STrond Myklebust static inline 67949a70f27STrond Myklebust unsigned int nfs_page_length(struct page *page) 68049a70f27STrond Myklebust { 681d56b4ddfSMel Gorman loff_t i_size = i_size_read(page_file_mapping(page)->host); 68249a70f27STrond Myklebust 68349a70f27STrond Myklebust if (i_size > 0) { 6848cd79788SHuang Ying pgoff_t index = page_index(page); 68509cbfeafSKirill A. Shutemov pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; 6868cd79788SHuang Ying if (index < end_index) 68709cbfeafSKirill A. Shutemov return PAGE_SIZE; 6888cd79788SHuang Ying if (index == end_index) 68909cbfeafSKirill A. Shutemov return ((i_size - 1) & ~PAGE_MASK) + 1; 69049a70f27STrond Myklebust } 69149a70f27STrond Myklebust return 0; 69249a70f27STrond Myklebust } 6938d5658c9STrond Myklebust 6948d5658c9STrond Myklebust /* 6950b26a0bfSTrond Myklebust * Convert a umode to a dirent->d_type 6960b26a0bfSTrond Myklebust */ 6970b26a0bfSTrond Myklebust static inline 6980b26a0bfSTrond Myklebust unsigned char nfs_umode_to_dtype(umode_t mode) 6990b26a0bfSTrond Myklebust { 7000b26a0bfSTrond Myklebust return (mode >> 12) & 15; 7010b26a0bfSTrond Myklebust } 7020b26a0bfSTrond Myklebust 7030b26a0bfSTrond Myklebust /* 7048d5658c9STrond Myklebust * Determine the number of pages in an array of length 'len' and 7058d5658c9STrond Myklebust * with a base offset of 'base' 7068d5658c9STrond Myklebust */ 7078d5658c9STrond Myklebust static inline 7088d5658c9STrond Myklebust unsigned int nfs_page_array_len(unsigned int base, size_t len) 7098d5658c9STrond Myklebust { 7108d5658c9STrond Myklebust return ((unsigned long)len + (unsigned long)base + 7118d5658c9STrond Myklebust PAGE_SIZE - 1) >> PAGE_SHIFT; 7128d5658c9STrond Myklebust } 7130110ee15STrond Myklebust 7143a1556e8STrond Myklebust /* 7153a1556e8STrond Myklebust * Convert a struct timespec into a 64-bit change attribute 7163a1556e8STrond Myklebust * 7173a1556e8STrond Myklebust * This does approximately the same thing as timespec_to_ns(), 7183a1556e8STrond Myklebust * but for calculation efficiency, we multiply the seconds by 7193a1556e8STrond Myklebust * 1024*1024*1024. 7203a1556e8STrond Myklebust */ 7213a1556e8STrond Myklebust static inline 7223a1556e8STrond Myklebust u64 nfs_timespec_to_change_attr(const struct timespec *ts) 7233a1556e8STrond Myklebust { 7243a1556e8STrond Myklebust return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 7253a1556e8STrond Myklebust } 7261264a2f0STrond Myklebust 7271264a2f0STrond Myklebust #ifdef CONFIG_CRC32 7281264a2f0STrond Myklebust /** 7291264a2f0STrond Myklebust * nfs_fhandle_hash - calculate the crc32 hash for the filehandle 7301264a2f0STrond Myklebust * @fh - pointer to filehandle 7311264a2f0STrond Myklebust * 7321264a2f0STrond Myklebust * returns a crc32 hash for the filehandle that is compatible with 7331264a2f0STrond Myklebust * the one displayed by "wireshark". 7341264a2f0STrond Myklebust */ 7351264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7361264a2f0STrond Myklebust { 7371264a2f0STrond Myklebust return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); 7381264a2f0STrond Myklebust } 73948c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) 74048c9579aSOlga Kornievskaia { 74148c9579aSOlga Kornievskaia return ~crc32_le(0xFFFFFFFF, &stateid->other[0], 74248c9579aSOlga Kornievskaia NFS4_STATEID_OTHER_SIZE); 74348c9579aSOlga Kornievskaia } 7441264a2f0STrond Myklebust #else 7451264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7461264a2f0STrond Myklebust { 7471264a2f0STrond Myklebust return 0; 7481264a2f0STrond Myklebust } 74948c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) 75048c9579aSOlga Kornievskaia { 75148c9579aSOlga Kornievskaia return 0; 75248c9579aSOlga Kornievskaia } 7531264a2f0STrond Myklebust #endif 7540bcbf039SPeng Tao 7550bcbf039SPeng Tao static inline bool nfs_error_is_fatal(int err) 7560bcbf039SPeng Tao { 7570bcbf039SPeng Tao switch (err) { 7580bcbf039SPeng Tao case -ERESTARTSYS: 75954551d85STrond Myklebust case -EACCES: 76054551d85STrond Myklebust case -EDQUOT: 76154551d85STrond Myklebust case -EFBIG: 7620bcbf039SPeng Tao case -EIO: 7630bcbf039SPeng Tao case -ENOSPC: 7640bcbf039SPeng Tao case -EROFS: 76554551d85STrond Myklebust case -ESTALE: 7660bcbf039SPeng Tao case -E2BIG: 7670bcbf039SPeng Tao return true; 7680bcbf039SPeng Tao default: 7690bcbf039SPeng Tao return false; 7700bcbf039SPeng Tao } 7710bcbf039SPeng Tao } 772bf4b4905SNeilBrown 773bf4b4905SNeilBrown static inline void nfs_context_set_write_error(struct nfs_open_context *ctx, int error) 774bf4b4905SNeilBrown { 775bf4b4905SNeilBrown ctx->error = error; 776bf4b4905SNeilBrown smp_wmb(); 777bf4b4905SNeilBrown set_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags); 778bf4b4905SNeilBrown } 779