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" 7f2aedb71SDavid Howells #include <linux/fs_context.h> 8f9c3a380SEric Paris #include <linux/security.h> 91264a2f0STrond Myklebust #include <linux/crc32.h> 109954bf92SDavid Howells #include <linux/sunrpc/addr.h> 1147af81f2SPeng Tao #include <linux/nfs_page.h> 125dd43ce2SIngo Molnar #include <linux/wait_bit.h> 13f7b422b1SDavid Howells 1462a55d08SScott Mayhew #define NFS_SB_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS) 1508734048SDavid Howells 1620fa1902SPeng Tao extern const struct export_operations nfs_export_ops; 1720fa1902SPeng Tao 1854ceac45SDavid Howells struct nfs_string; 19f2aedb71SDavid Howells struct nfs_pageio_descriptor; 2054ceac45SDavid Howells 217ebb9315SBryan Schumaker static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) 227ebb9315SBryan Schumaker { 237ebb9315SBryan Schumaker if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid)) 247ebb9315SBryan Schumaker fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT; 257ebb9315SBryan Schumaker } 267ebb9315SBryan Schumaker 27533eb461SAndy Adamson static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) 28533eb461SAndy Adamson { 29533eb461SAndy Adamson if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) || 30533eb461SAndy Adamson (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) && 31533eb461SAndy Adamson ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0))) 32533eb461SAndy Adamson return 0; 33533eb461SAndy Adamson return 1; 34533eb461SAndy Adamson } 35533eb461SAndy Adamson 366b18eaa0S\"Talpey, Thomas\ /* 37a14017dbSChuck Lever * Note: RFC 1813 doesn't limit the number of auth flavors that 38a14017dbSChuck Lever * a server can return, so make something up. 39a14017dbSChuck Lever */ 40a14017dbSChuck Lever #define NFS_MAX_SECFLAVORS (12) 41a14017dbSChuck Lever 42a14017dbSChuck Lever /* 434cfd74fcSChuck Lever * Value used if the user did not specify a port value. 444cfd74fcSChuck Lever */ 454cfd74fcSChuck Lever #define NFS_UNSPEC_PORT (-1) 464cfd74fcSChuck Lever 47a956bedaSTrond Myklebust #define NFS_UNSPEC_RETRANS (UINT_MAX) 48a956bedaSTrond Myklebust #define NFS_UNSPEC_TIMEO (UINT_MAX) 49a956bedaSTrond Myklebust 504cfd74fcSChuck Lever /* 5156e4ebf8SBryan Schumaker * Maximum number of pages that readdir can use for creating 5256e4ebf8SBryan Schumaker * a vmapped array of pages. 5356e4ebf8SBryan Schumaker */ 54db531db9SMax Kellermann #define NFS_MAX_READDIR_PAGES 8 5556e4ebf8SBryan Schumaker 56fcf10398SBryan Schumaker struct nfs_client_initdata { 57fcf10398SBryan Schumaker unsigned long init_flags; 585c6e5b60STrond Myklebust const char *hostname; /* Hostname of the server */ 595c6e5b60STrond Myklebust const struct sockaddr *addr; /* Address of the server */ 605c6e5b60STrond Myklebust const char *nodename; /* Hostname of the client */ 615c6e5b60STrond Myklebust const char *ip_addr; /* IP address of the client */ 62fcf10398SBryan Schumaker size_t addrlen; 63ab7017a3SBryan Schumaker struct nfs_subversion *nfs_mod; 64fcf10398SBryan Schumaker int proto; 65fcf10398SBryan Schumaker u32 minorversion; 666619079dSTrond Myklebust unsigned int nconnect; 67fcf10398SBryan Schumaker struct net *net; 685c6e5b60STrond Myklebust const struct rpc_timeout *timeparms; 691a58e8a0STrond Myklebust const struct cred *cred; 70fcf10398SBryan Schumaker }; 71fcf10398SBryan Schumaker 7256e4ebf8SBryan Schumaker /* 736b18eaa0S\"Talpey, Thomas\ * In-kernel mount arguments 746b18eaa0S\"Talpey, Thomas\ */ 755eb005caSDavid Howells struct nfs_fs_context { 76f2aedb71SDavid Howells bool internal; 77f2aedb71SDavid Howells bool skip_reconfig_option_check; 78f2aedb71SDavid Howells bool need_mount; 79f2aedb71SDavid Howells bool sloppy; 80e558100fSDavid Howells unsigned int flags; /* NFS{,4}_MOUNT_* flags */ 818cb7f74eSChuck Lever unsigned int rsize, wsize; 828cb7f74eSChuck Lever unsigned int timeo, retrans; 83e558100fSDavid Howells unsigned int acregmin, acregmax; 84e558100fSDavid Howells unsigned int acdirmin, acdirmax; 858cb7f74eSChuck Lever unsigned int namlen; 86b797cac7SDavid Howells unsigned int options; 876b18eaa0S\"Talpey, Thomas\ unsigned int bsize; 88a3f73c27SWeston Andros Adamson struct nfs_auth_info auth_info; 89a3f73c27SWeston Andros Adamson rpc_authflavor_t selected_flavor; 906b18eaa0S\"Talpey, Thomas\ char *client_address; 91764302ccSChuck Lever unsigned int version; 923fd5be9eSMike Sager unsigned int minorversion; 9308734048SDavid Howells char *fscache_uniq; 94f8ee01e3SDavid Howells unsigned short protofamily; 95f8ee01e3SDavid Howells unsigned short mountfamily; 966b18eaa0S\"Talpey, Thomas\ 976b18eaa0S\"Talpey, Thomas\ struct { 98e558100fSDavid Howells union { 99e558100fSDavid Howells struct sockaddr address; 100e558100fSDavid Howells struct sockaddr_storage _address; 101e558100fSDavid Howells }; 1024c568017SChuck Lever size_t addrlen; 1036b18eaa0S\"Talpey, Thomas\ char *hostname; 10478fa701fSChuck Lever u32 version; 1054cfd74fcSChuck Lever int port; 10678fa701fSChuck Lever unsigned short protocol; 1076b18eaa0S\"Talpey, Thomas\ } mount_server; 1086b18eaa0S\"Talpey, Thomas\ 1096b18eaa0S\"Talpey, Thomas\ struct { 110e558100fSDavid Howells union { 111e558100fSDavid Howells struct sockaddr address; 112e558100fSDavid Howells struct sockaddr_storage _address; 113e558100fSDavid Howells }; 1144c568017SChuck Lever size_t addrlen; 1156b18eaa0S\"Talpey, Thomas\ char *hostname; 1166b18eaa0S\"Talpey, Thomas\ char *export_path; 1174cfd74fcSChuck Lever int port; 11878fa701fSChuck Lever unsigned short protocol; 11928cc5cd8STrond Myklebust unsigned short nconnect; 120f2aedb71SDavid Howells unsigned short export_path_len; 1216b18eaa0S\"Talpey, Thomas\ } nfs_server; 122f9c3a380SEric Paris 12362a55d08SScott Mayhew struct nfs_fh *mntfh; 12462a55d08SScott Mayhew struct nfs_server *server; 12562a55d08SScott Mayhew struct nfs_subversion *nfs_mod; 12648be8a66SDavid Howells 12762a55d08SScott Mayhew /* Information for a cloned mount. */ 12862a55d08SScott Mayhew struct nfs_clone_mount { 12962a55d08SScott Mayhew struct super_block *sb; 13062a55d08SScott Mayhew struct dentry *dentry; 13162a55d08SScott Mayhew struct nfs_fattr *fattr; 13262a55d08SScott Mayhew unsigned int inherited_bsize; 13362a55d08SScott Mayhew } clone_data; 1346b18eaa0S\"Talpey, Thomas\ }; 1356b18eaa0S\"Talpey, Thomas\ 136ce8866f0SScott Mayhew #define nfs_errorf(fc, fmt, ...) errorf(fc, fmt, ## __VA_ARGS__) 137ce8866f0SScott Mayhew #define nfs_invalf(fc, fmt, ...) invalf(fc, fmt, ## __VA_ARGS__) 138ce8866f0SScott Mayhew #define nfs_warnf(fc, fmt, ...) warnf(fc, fmt, ## __VA_ARGS__) 139ce8866f0SScott Mayhew 140f2aedb71SDavid Howells static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc) 141f2aedb71SDavid Howells { 142f2aedb71SDavid Howells return fc->fs_private; 143f2aedb71SDavid Howells } 144f2aedb71SDavid Howells 145146ec944SChuck Lever /* mount_clnt.c */ 146c5d120f8SChuck Lever struct nfs_mount_request { 147c5d120f8SChuck Lever struct sockaddr *sap; 148c5d120f8SChuck Lever size_t salen; 149c5d120f8SChuck Lever char *hostname; 150c5d120f8SChuck Lever char *dirpath; 151c5d120f8SChuck Lever u32 version; 152c5d120f8SChuck Lever unsigned short protocol; 153c5d120f8SChuck Lever struct nfs_fh *fh; 15450a737f8SChuck Lever int noresvport; 1558e02f6b9SChuck Lever unsigned int *auth_flav_len; 1568e02f6b9SChuck Lever rpc_authflavor_t *auth_flavs; 1576d59b8d5SStanislav Kinsbursky struct net *net; 158c5d120f8SChuck Lever }; 159c5d120f8SChuck Lever 160c5d120f8SChuck Lever extern int nfs_mount(struct nfs_mount_request *info); 1610b524123SChuck Lever extern void nfs_umount(const struct nfs_mount_request *info); 162146ec944SChuck Lever 16324c8dbbbSDavid Howells /* client.c */ 164a613fa16STrond Myklebust extern const struct rpc_program nfs_program; 1656b13168bSStanislav Kinsbursky extern void nfs_clients_init(struct net *net); 16610b7a70cSTrond Myklebust extern void nfs_clients_exit(struct net *net); 1676663ee7fSBryan Schumaker extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); 1685c6e5b60STrond Myklebust int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t); 1697d38de3fSAnna Schumaker struct nfs_client *nfs_get_client(const struct nfs_client_initdata *); 170fcf10398SBryan Schumaker int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); 171fcf10398SBryan Schumaker void nfs_server_insert_lists(struct nfs_server *); 17232e62b7cSChuck Lever void nfs_server_remove_lists(struct nfs_server *); 173a956bedaSTrond Myklebust void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans); 174fcf10398SBryan Schumaker int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, 175fcf10398SBryan Schumaker rpc_authflavor_t); 176fcf10398SBryan Schumaker struct nfs_server *nfs_alloc_server(void); 177fcf10398SBryan Schumaker void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); 17854ceac45SDavid Howells 17924c8dbbbSDavid Howells extern void nfs_put_client(struct nfs_client *); 180cdb7ecedSBryan Schumaker extern void nfs_free_client(struct nfs_client *); 18128cd1b3fSStanislav Kinsbursky extern struct nfs_client *nfs4_find_client_ident(struct net *, int); 182c36fca52SAndy Adamson extern struct nfs_client * 183c7add9a9SStanislav Kinsbursky nfs4_find_client_sessionid(struct net *, const struct sockaddr *, 184459de2edSBryan Schumaker struct nfs4_sessionid *, u32); 18562a55d08SScott Mayhew extern struct nfs_server *nfs_create_server(struct fs_context *); 18662a55d08SScott Mayhew extern struct nfs_server *nfs4_create_server(struct fs_context *); 18762a55d08SScott Mayhew extern struct nfs_server *nfs4_create_referral_server(struct fs_context *); 18832e62b7cSChuck Lever extern int nfs4_update_server(struct nfs_server *server, const char *hostname, 189292f503cSTrond Myklebust struct sockaddr *sap, size_t salen, 190292f503cSTrond Myklebust struct net *net); 19154ceac45SDavid Howells extern void nfs_free_server(struct nfs_server *server); 19254ceac45SDavid Howells extern struct nfs_server *nfs_clone_server(struct nfs_server *, 19354ceac45SDavid Howells struct nfs_fh *, 1947e6eb683SBryan Schumaker struct nfs_fattr *, 1957e6eb683SBryan Schumaker rpc_authflavor_t); 196a33e4b03SWeston Andros Adamson extern bool nfs_client_init_is_complete(const struct nfs_client *clp); 197a33e4b03SWeston Andros Adamson extern int nfs_client_init_status(const struct nfs_client *clp); 1984697bd5eSTrond Myklebust extern int nfs_wait_client_init_complete(const struct nfs_client *clp); 19976db6d95SAndy Adamson extern void nfs_mark_client_ready(struct nfs_client *clp, int state); 2003fc75f12STigran Mkrtchyan extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, 201d83217c1SAndy Adamson const struct sockaddr *ds_addr, 20298fc685aSAndy Adamson int ds_addrlen, int ds_proto, 20398fc685aSAndy Adamson unsigned int ds_timeo, 204064172f3SPeng Tao unsigned int ds_retrans, 2057d38de3fSAnna Schumaker u32 minor_version); 2060e20162eSAndy Adamson extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, 2070e20162eSAndy Adamson struct inode *); 208b224f7cbSTigran Mkrtchyan extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, 2091a04c6e1SPeng Tao const struct sockaddr *ds_addr, int ds_addrlen, 2101a04c6e1SPeng Tao int ds_proto, unsigned int ds_timeo, 2117d38de3fSAnna Schumaker unsigned int ds_retrans); 2126aaca566SDavid Howells #ifdef CONFIG_PROC_FS 2136aaca566SDavid Howells extern int __init nfs_fs_proc_init(void); 2146aaca566SDavid Howells extern void nfs_fs_proc_exit(void); 21565b38851SEric W. Biederman extern int nfs_fs_proc_net_init(struct net *net); 21665b38851SEric W. Biederman extern void nfs_fs_proc_net_exit(struct net *net); 2176aaca566SDavid Howells #else 21865b38851SEric W. Biederman static inline int nfs_fs_proc_net_init(struct net *net) 21965b38851SEric W. Biederman { 22065b38851SEric W. Biederman return 0; 22165b38851SEric W. Biederman } 22265b38851SEric W. Biederman static inline void nfs_fs_proc_net_exit(struct net *net) 22365b38851SEric W. Biederman { 22465b38851SEric W. Biederman } 2256aaca566SDavid Howells static inline int nfs_fs_proc_init(void) 2266aaca566SDavid Howells { 2276aaca566SDavid Howells return 0; 2286aaca566SDavid Howells } 2296aaca566SDavid Howells static inline void nfs_fs_proc_exit(void) 2306aaca566SDavid Howells { 2316aaca566SDavid Howells } 2326aaca566SDavid Howells #endif 23324c8dbbbSDavid Howells 234f7b422b1SDavid Howells /* callback_xdr.c */ 235e9679189SChristoph Hellwig extern const struct svc_version nfs4_callback_version1; 236e9679189SChristoph Hellwig extern const struct svc_version nfs4_callback_version4; 237f7b422b1SDavid Howells 238f2aedb71SDavid Howells /* fs_context.c */ 239f2aedb71SDavid Howells extern struct file_system_type nfs_fs_type; 2409954bf92SDavid Howells 241f7b422b1SDavid Howells /* pagelist.c */ 242f7b422b1SDavid Howells extern int __init nfs_init_nfspagecache(void); 243266bee88SDavid Brownell extern void nfs_destroy_nfspagecache(void); 244f7b422b1SDavid Howells extern int __init nfs_init_readpagecache(void); 245266bee88SDavid Brownell extern void nfs_destroy_readpagecache(void); 246f7b422b1SDavid Howells extern int __init nfs_init_writepagecache(void); 247266bee88SDavid Brownell extern void nfs_destroy_writepagecache(void); 248f7b422b1SDavid Howells 249f7b422b1SDavid Howells extern int __init nfs_init_directcache(void); 250266bee88SDavid Brownell extern void nfs_destroy_directcache(void); 2514db6e0b7SFred Isaman extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 2524db6e0b7SFred Isaman struct nfs_pgio_header *hdr, 2534db6e0b7SFred Isaman void (*release)(struct nfs_pgio_header *hdr)); 2544db6e0b7SFred Isaman void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 255210c7c17SBenjamin Coddington int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); 256577b4232STrond Myklebust 25741d8d5b7SAnna Schumaker extern const struct nfs_pageio_ops nfs_pgio_rw_ops; 2581e7f3a48SWeston Andros Adamson struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); 2591e7f3a48SWeston Andros Adamson void nfs_pgio_header_free(struct nfs_pgio_header *); 260ef2c488cSAnna Schumaker int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); 26146a5ab47SPeng Tao int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, 262a52458b4SNeilBrown const struct cred *cred, const struct nfs_rpc_ops *rpc_ops, 26346a5ab47SPeng Tao const struct rpc_call_ops *call_ops, int how, int flags); 264d4581383SWeston Andros Adamson void nfs_free_request(struct nfs_page *req); 26548d635f1SPeng Tao struct nfs_pgio_mirror * 26648d635f1SPeng Tao nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); 26700bfa30aSAnna Schumaker 26847af81f2SPeng Tao static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc) 26947af81f2SPeng Tao { 27047af81f2SPeng Tao WARN_ON_ONCE(desc->pg_mirror_count < 1); 27147af81f2SPeng Tao return desc->pg_mirror_count > 1; 27247af81f2SPeng Tao } 27347af81f2SPeng Tao 274138a2935STrond Myklebust static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, 275138a2935STrond Myklebust const struct nfs_open_context *ctx2) 276138a2935STrond Myklebust { 277a52458b4SNeilBrown return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state; 278138a2935STrond Myklebust } 279138a2935STrond Myklebust 280f7b422b1SDavid Howells /* nfs2xdr.c */ 281499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs_procedures[]; 282573c4e1eSChuck Lever extern int nfs2_decode_dirent(struct xdr_stream *, 283a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 284f7b422b1SDavid Howells 285f7b422b1SDavid Howells /* nfs3xdr.c */ 286499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs3_procedures[]; 287573c4e1eSChuck Lever extern int nfs3_decode_dirent(struct xdr_stream *, 288a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 289f7b422b1SDavid Howells 290f7b422b1SDavid Howells /* nfs4xdr.c */ 29189d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 292573c4e1eSChuck Lever extern int nfs4_decode_dirent(struct xdr_stream *, 293a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 2947d4e2747SDavid Howells #endif 2952449ea2eSAlexandros Batsakis #ifdef CONFIG_NFS_V4_1 2962449ea2eSAlexandros Batsakis extern const u32 nfs41_maxread_overhead; 2972449ea2eSAlexandros Batsakis extern const u32 nfs41_maxwrite_overhead; 298f1c097beSAndy Adamson extern const u32 nfs41_maxgetdevinfo_overhead; 2992449ea2eSAlexandros Batsakis #endif 300f7b422b1SDavid Howells 301f7b422b1SDavid Howells /* nfs4proc.c */ 30289d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 303499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs4_procedures[]; 304d75d5414SAndrew Morton #endif 305f7b422b1SDavid Howells 306694e096fSAnna Schumaker #ifdef CONFIG_NFS_V4_SECURITY_LABEL 307694e096fSAnna Schumaker extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); 308a49c2691SKinglong Mee static inline struct nfs4_label * 309a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 310a49c2691SKinglong Mee { 311a49c2691SKinglong Mee if (!dst || !src) 312a49c2691SKinglong Mee return NULL; 313a49c2691SKinglong Mee 314a49c2691SKinglong Mee if (src->len > NFS4_MAXLABELLEN) 315a49c2691SKinglong Mee return NULL; 316a49c2691SKinglong Mee 317a49c2691SKinglong Mee dst->lfs = src->lfs; 318a49c2691SKinglong Mee dst->pi = src->pi; 319a49c2691SKinglong Mee dst->len = src->len; 320a49c2691SKinglong Mee memcpy(dst->label, src->label, src->len); 321a49c2691SKinglong Mee 322a49c2691SKinglong Mee return dst; 323a49c2691SKinglong Mee } 324694e096fSAnna Schumaker static inline void nfs4_label_free(struct nfs4_label *label) 325694e096fSAnna Schumaker { 326694e096fSAnna Schumaker if (label) { 327694e096fSAnna Schumaker kfree(label->label); 328694e096fSAnna Schumaker kfree(label); 329694e096fSAnna Schumaker } 330694e096fSAnna Schumaker return; 331694e096fSAnna Schumaker } 332fd1defc2STrond Myklebust 333fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 334fd1defc2STrond Myklebust { 335fd1defc2STrond Myklebust if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) 336fd1defc2STrond Myklebust nfsi->cache_validity |= NFS_INO_INVALID_LABEL; 337fd1defc2STrond Myklebust } 338694e096fSAnna Schumaker #else 339694e096fSAnna Schumaker static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } 340694e096fSAnna Schumaker static inline void nfs4_label_free(void *label) {} 341fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 342fd1defc2STrond Myklebust { 343fd1defc2STrond Myklebust } 344a49c2691SKinglong Mee static inline struct nfs4_label * 345a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 346a49c2691SKinglong Mee { 347a49c2691SKinglong Mee return NULL; 348a49c2691SKinglong Mee } 349694e096fSAnna Schumaker #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 350694e096fSAnna Schumaker 3517fe5c398STrond Myklebust /* proc.c */ 3527fe5c398STrond Myklebust void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 3538cab4c39SChuck Lever extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 3545c6e5b60STrond Myklebust const struct nfs_client_initdata *); 3557fe5c398STrond Myklebust 356979df72eSTrond Myklebust /* dir.c */ 3571bcf4c5cSTrond Myklebust extern void nfs_advise_use_readdirplus(struct inode *dir); 358311324adSTrond Myklebust extern void nfs_force_use_readdirplus(struct inode *dir); 3591ab6c499SDave Chinner extern unsigned long nfs_access_cache_count(struct shrinker *shrink, 3601ab6c499SDave Chinner struct shrink_control *sc); 3611ab6c499SDave Chinner extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, 3621495f230SYing Han struct shrink_control *sc); 363597d9289SBryan Schumaker struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 364597d9289SBryan Schumaker int nfs_create(struct inode *, struct dentry *, umode_t, bool); 365597d9289SBryan Schumaker int nfs_mkdir(struct inode *, struct dentry *, umode_t); 366597d9289SBryan Schumaker int nfs_rmdir(struct inode *, struct dentry *); 367597d9289SBryan Schumaker int nfs_unlink(struct inode *, struct dentry *); 368597d9289SBryan Schumaker int nfs_symlink(struct inode *, struct dentry *, const char *); 369597d9289SBryan Schumaker int nfs_link(struct dentry *, struct inode *, struct dentry *); 370597d9289SBryan Schumaker int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); 3711cd66c93SMiklos Szeredi int nfs_rename(struct inode *, struct dentry *, 3721cd66c93SMiklos Szeredi struct inode *, struct dentry *, unsigned int); 373979df72eSTrond Myklebust 374ce4ef7c0SBryan Schumaker /* file.c */ 3754ff79bc7SChristoph Hellwig int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 376ce4ef7c0SBryan Schumaker loff_t nfs_file_llseek(struct file *, loff_t, int); 3773aa2d199SAl Viro ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); 378ce4ef7c0SBryan Schumaker int nfs_file_mmap(struct file *, struct vm_area_struct *); 379edaf4369SAl Viro ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); 380ce4ef7c0SBryan Schumaker int nfs_file_release(struct inode *, struct file *); 381ce4ef7c0SBryan Schumaker int nfs_lock(struct file *, int, struct file_lock *); 382ce4ef7c0SBryan Schumaker int nfs_flock(struct file *, int, struct file_lock *); 383ce4ef7c0SBryan Schumaker int nfs_check_flags(int); 384ce4ef7c0SBryan Schumaker 385f7b422b1SDavid Howells /* inode.c */ 3865746006fSTrond Myklebust extern struct workqueue_struct *nfsiod_workqueue; 387f7b422b1SDavid Howells extern struct inode *nfs_alloc_inode(struct super_block *sb); 388ca1a199eSAl Viro extern void nfs_free_inode(struct inode *); 389a9185b41SChristoph Hellwig extern int nfs_write_inode(struct inode *, struct writeback_control *); 390eed99357STrond Myklebust extern int nfs_drop_inode(struct inode *); 39119d87ca3SBryan Schumaker extern void nfs_clear_inode(struct inode *); 392b57922d9SAl Viro extern void nfs_evict_inode(struct inode *); 393f41f7418STrond Myklebust void nfs_zap_acl_cache(struct inode *inode); 39461540bf6STrond Myklebust extern bool nfs_check_cache_invalid(struct inode *, unsigned long); 395dfd01f02SPeter Zijlstra extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); 3965e4def20SDavid Howells extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode); 397f7b422b1SDavid Howells 398f7b422b1SDavid Howells /* super.c */ 3996a74490dSBryan Schumaker extern const struct super_operations nfs_sops; 4004d4b69ddSWeston Andros Adamson bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); 401f2aedb71SDavid Howells int nfs_try_get_tree(struct fs_context *); 402f2aedb71SDavid Howells int nfs_get_tree_common(struct fs_context *); 403fbdefd64SBryan Schumaker void nfs_kill_super(struct super_block *); 4044ebd9ab3SDominik Hackl 405f7b422b1SDavid Howells extern struct rpc_stat nfs_rpcstat; 4064ebd9ab3SDominik Hackl 407f7b422b1SDavid Howells extern int __init register_nfs_fs(void); 408f7b422b1SDavid Howells extern void __exit unregister_nfs_fs(void); 409ea7c38feSTrond Myklebust extern bool nfs_sb_active(struct super_block *sb); 4101daef0a8STrond Myklebust extern void nfs_sb_deactive(struct super_block *sb); 411f7b422b1SDavid Howells 412a5864c99STrond Myklebust /* io.c */ 413a5864c99STrond Myklebust extern void nfs_start_io_read(struct inode *inode); 414a5864c99STrond Myklebust extern void nfs_end_io_read(struct inode *inode); 415a5864c99STrond Myklebust extern void nfs_start_io_write(struct inode *inode); 416a5864c99STrond Myklebust extern void nfs_end_io_write(struct inode *inode); 417a5864c99STrond Myklebust extern void nfs_start_io_direct(struct inode *inode); 418a5864c99STrond Myklebust extern void nfs_end_io_direct(struct inode *inode); 419a5864c99STrond Myklebust 420651b0e70STrond Myklebust static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) 421651b0e70STrond Myklebust { 422651b0e70STrond Myklebust return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0; 423651b0e70STrond Myklebust } 424651b0e70STrond Myklebust 425f7b422b1SDavid Howells /* namespace.c */ 42697a54868SBen Hutchings #define NFS_PATH_CANONICAL 1 427b514f872SAl Viro extern char *nfs_path(char **p, struct dentry *dentry, 42897a54868SBen Hutchings char *buffer, ssize_t buflen, unsigned flags); 42936d43a43SDavid Howells extern struct vfsmount *nfs_d_automount(struct path *path); 430f2aedb71SDavid Howells int nfs_submount(struct fs_context *, struct nfs_server *); 431f2aedb71SDavid Howells int nfs_do_submount(struct fs_context *); 432f7b422b1SDavid Howells 43354ceac45SDavid Howells /* getroot.c */ 43462a55d08SScott Mayhew extern int nfs_get_root(struct super_block *s, struct fs_context *fc); 43589d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 4365e6b1990STrond Myklebust extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); 4377d4e2747SDavid Howells #endif 438f7b422b1SDavid Howells 439061ae2edSFred Isaman struct nfs_pgio_completion_ops; 440f11c88afSAndy Adamson /* read.c */ 441584aa810SFred Isaman extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 442fab5fc25SChristoph Hellwig struct inode *inode, bool force_mds, 443584aa810SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 444f11c88afSAndy Adamson extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 445493292ddSTrond Myklebust extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 446e885de1aSTrond Myklebust 447fbdefd64SBryan Schumaker /* super.c */ 448fbdefd64SBryan Schumaker void nfs_umount_begin(struct super_block *); 449fbdefd64SBryan Schumaker int nfs_statfs(struct dentry *, struct kstatfs *); 450fbdefd64SBryan Schumaker int nfs_show_options(struct seq_file *, struct dentry *); 451fbdefd64SBryan Schumaker int nfs_show_devname(struct seq_file *, struct dentry *); 452fbdefd64SBryan Schumaker int nfs_show_path(struct seq_file *, struct dentry *); 453fbdefd64SBryan Schumaker int nfs_show_stats(struct seq_file *, struct dentry *); 454f2aedb71SDavid Howells int nfs_reconfigure(struct fs_context *); 455fbdefd64SBryan Schumaker 456def6ed7eSAndy Adamson /* write.c */ 4571763da12SFred Isaman extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 458a20c93e3SChristoph Hellwig struct inode *inode, int ioflags, bool force_mds, 4591763da12SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 460dce81290STrond Myklebust extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 4610b7c0153SFred Isaman extern void nfs_commit_free(struct nfs_commit_data *p); 462def6ed7eSAndy Adamson extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 4630b7c0153SFred Isaman extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 4640b7c0153SFred Isaman extern int nfs_initiate_commit(struct rpc_clnt *clnt, 4650b7c0153SFred Isaman struct nfs_commit_data *data, 466c36aae9aSPeng Tao const struct nfs_rpc_ops *nfs_ops, 467e0c2b380SFred Isaman const struct rpc_call_ops *call_ops, 4689f0ec176SAndy Adamson int how, int flags); 4690b7c0153SFred Isaman extern void nfs_init_commit(struct nfs_commit_data *data, 470e0c2b380SFred Isaman struct list_head *head, 471f453a54aSFred Isaman struct pnfs_layout_segment *lseg, 472f453a54aSFred Isaman struct nfs_commit_info *cinfo); 4731763da12SFred Isaman int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 4741763da12SFred Isaman struct nfs_commit_info *cinfo, int max); 475ce59515cSAnna Schumaker unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); 4761763da12SFred Isaman int nfs_scan_commit(struct inode *inode, struct list_head *dst, 4771763da12SFred Isaman struct nfs_commit_info *cinfo); 4781763da12SFred Isaman void nfs_mark_request_commit(struct nfs_page *req, 4791763da12SFred Isaman struct pnfs_layout_segment *lseg, 480b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 481b57ff130SWeston Andros Adamson u32 ds_commit_idx); 482c65e6254SWeston Andros Adamson int nfs_write_need_commit(struct nfs_pgio_header *); 483a08a8cd3STrond Myklebust void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); 4841763da12SFred Isaman int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 4851763da12SFred Isaman int how, struct nfs_commit_info *cinfo); 486e0c2b380SFred Isaman void nfs_retry_commit(struct list_head *page_list, 487ea2cf228SFred Isaman struct pnfs_layout_segment *lseg, 488b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 489b57ff130SWeston Andros Adamson u32 ds_commit_idx); 4900b7c0153SFred Isaman void nfs_commitdata_release(struct nfs_commit_data *data); 4916272dcc6SAnna Schumaker void nfs_request_add_commit_list(struct nfs_page *req, 492ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 49386d80f97STrond Myklebust void nfs_request_add_commit_list_locked(struct nfs_page *req, 49486d80f97STrond Myklebust struct list_head *dst, 49586d80f97STrond Myklebust struct nfs_commit_info *cinfo); 496ea2cf228SFred Isaman void nfs_request_remove_commit_list(struct nfs_page *req, 497ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 498ea2cf228SFred Isaman void nfs_init_cinfo(struct nfs_commit_info *cinfo, 499ea2cf228SFred Isaman struct inode *inode, 500ea2cf228SFred Isaman struct nfs_direct_req *dreq); 501dc24826bSAndy Adamson int nfs_key_timeout_notify(struct file *filp, struct inode *inode); 502ce52914eSScott Mayhew bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode); 503a7d42ddbSWeston Andros Adamson void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); 504e0c2b380SFred Isaman 505837bb1d7STrond Myklebust int nfs_filemap_write_and_wait_range(struct address_space *mapping, 506837bb1d7STrond Myklebust loff_t lstart, loff_t lend); 507837bb1d7STrond Myklebust 508a5314a74STrond Myklebust #ifdef CONFIG_NFS_V4_1 509a5314a74STrond Myklebust static inline 510a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 511a5314a74STrond Myklebust { 512a5314a74STrond Myklebust int i; 513a5314a74STrond Myklebust 514a5314a74STrond Myklebust for (i = 0; i < cinfo->nbuckets; i++) 515a5314a74STrond Myklebust cinfo->buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; 516a5314a74STrond Myklebust } 517a5314a74STrond Myklebust #else 518a5314a74STrond Myklebust static inline 519a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 520a5314a74STrond Myklebust { 521a5314a74STrond Myklebust } 522a5314a74STrond Myklebust #endif 523a5314a74STrond Myklebust 524074cc1deSTrond Myklebust #ifdef CONFIG_MIGRATION 525074cc1deSTrond Myklebust extern int nfs_migrate_page(struct address_space *, 526a6bc32b8SMel Gorman struct page *, struct page *, enum migrate_mode); 527074cc1deSTrond Myklebust #endif 528def6ed7eSAndy Adamson 5298fc3c386STrond Myklebust static inline int 5308fc3c386STrond Myklebust nfs_write_verifier_cmp(const struct nfs_write_verifier *v1, 5318fc3c386STrond Myklebust const struct nfs_write_verifier *v2) 5328fc3c386STrond Myklebust { 5338fc3c386STrond Myklebust return memcmp(v1->data, v2->data, sizeof(v1->data)); 5348fc3c386STrond Myklebust } 5358fc3c386STrond Myklebust 5360e862a40SJeff Layton /* unlink.c */ 5370e862a40SJeff Layton extern struct rpc_task * 5380e862a40SJeff Layton nfs_async_rename(struct inode *old_dir, struct inode *new_dir, 5390e862a40SJeff Layton struct dentry *old_dentry, struct dentry *new_dentry, 5400e862a40SJeff Layton void (*complete)(struct rpc_task *, struct nfs_renamedata *)); 5410e862a40SJeff Layton extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); 5420e862a40SJeff Layton 5431763da12SFred Isaman /* direct.c */ 5441763da12SFred Isaman void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, 5451763da12SFred Isaman struct nfs_direct_req *dreq); 5466296556fSPeng Tao extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); 5471763da12SFred Isaman 548cccef3b9SAndy Adamson /* nfs4proc.c */ 5498cab4c39SChuck Lever extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 5505c6e5b60STrond Myklebust const struct nfs_client_initdata *); 55105f4c350SChuck Lever extern int nfs40_walk_client_list(struct nfs_client *clp, 55205f4c350SChuck Lever struct nfs_client **result, 553a52458b4SNeilBrown const struct cred *cred); 55405f4c350SChuck Lever extern int nfs41_walk_client_list(struct nfs_client *clp, 55505f4c350SChuck Lever struct nfs_client **result, 556a52458b4SNeilBrown const struct cred *cred); 55710e037d1SSantosh kumar pradhan extern void nfs4_test_session_trunk(struct rpc_clnt *clnt, 55810e037d1SSantosh kumar pradhan struct rpc_xprt *xprt, 55910e037d1SSantosh kumar pradhan void *data); 560cccef3b9SAndy Adamson 561ea7c38feSTrond Myklebust static inline struct inode *nfs_igrab_and_active(struct inode *inode) 562ea7c38feSTrond Myklebust { 563ea7c38feSTrond Myklebust inode = igrab(inode); 564ea7c38feSTrond Myklebust if (inode != NULL && !nfs_sb_active(inode->i_sb)) { 565ea7c38feSTrond Myklebust iput(inode); 566ea7c38feSTrond Myklebust inode = NULL; 567ea7c38feSTrond Myklebust } 568ea7c38feSTrond Myklebust return inode; 569ea7c38feSTrond Myklebust } 570ea7c38feSTrond Myklebust 571ea7c38feSTrond Myklebust static inline void nfs_iput_and_deactive(struct inode *inode) 572ea7c38feSTrond Myklebust { 573ea7c38feSTrond Myklebust if (inode != NULL) { 574ea7c38feSTrond Myklebust struct super_block *sb = inode->i_sb; 575ea7c38feSTrond Myklebust 576ea7c38feSTrond Myklebust iput(inode); 577ea7c38feSTrond Myklebust nfs_sb_deactive(sb); 578ea7c38feSTrond Myklebust } 579ea7c38feSTrond Myklebust } 580ea7c38feSTrond Myklebust 581557134a3SAndy Adamson /* 582f7b422b1SDavid Howells * Determine the device name as a string 583f7b422b1SDavid Howells */ 584b514f872SAl Viro static inline char *nfs_devname(struct dentry *dentry, 585f7b422b1SDavid Howells char *buffer, ssize_t buflen) 586f7b422b1SDavid Howells { 587b514f872SAl Viro char *dummy; 58897a54868SBen Hutchings return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); 589f7b422b1SDavid Howells } 590f7b422b1SDavid Howells 591f7b422b1SDavid Howells /* 592f7b422b1SDavid Howells * Determine the actual block size (and log2 thereof) 593f7b422b1SDavid Howells */ 594f7b422b1SDavid Howells static inline 595f7b422b1SDavid Howells unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 596f7b422b1SDavid Howells { 597f7b422b1SDavid Howells /* make sure blocksize is a power of two */ 598f7b422b1SDavid Howells if ((bsize & (bsize - 1)) || nrbitsp) { 599f7b422b1SDavid Howells unsigned char nrbits; 600f7b422b1SDavid Howells 601f7b422b1SDavid Howells for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 602f7b422b1SDavid Howells ; 603f7b422b1SDavid Howells bsize = 1 << nrbits; 604f7b422b1SDavid Howells if (nrbitsp) 605f7b422b1SDavid Howells *nrbitsp = nrbits; 606f7b422b1SDavid Howells } 607f7b422b1SDavid Howells 608f7b422b1SDavid Howells return bsize; 609f7b422b1SDavid Howells } 610f7b422b1SDavid Howells 611f7b422b1SDavid Howells /* 612f7b422b1SDavid Howells * Calculate the number of 512byte blocks used. 613f7b422b1SDavid Howells */ 6149eaa67c6SChuck Lever static inline blkcnt_t nfs_calc_block_size(u64 tsize) 615f7b422b1SDavid Howells { 6169eaa67c6SChuck Lever blkcnt_t used = (tsize + 511) >> 9; 617f7b422b1SDavid Howells return (used > ULONG_MAX) ? ULONG_MAX : used; 618f7b422b1SDavid Howells } 619f7b422b1SDavid Howells 620f7b422b1SDavid Howells /* 621f7b422b1SDavid Howells * Compute and set NFS server blocksize 622f7b422b1SDavid Howells */ 623f7b422b1SDavid Howells static inline 624f7b422b1SDavid Howells unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 625f7b422b1SDavid Howells { 626f7b422b1SDavid Howells if (bsize < NFS_MIN_FILE_IO_SIZE) 627f7b422b1SDavid Howells bsize = NFS_DEF_FILE_IO_SIZE; 628f7b422b1SDavid Howells else if (bsize >= NFS_MAX_FILE_IO_SIZE) 629f7b422b1SDavid Howells bsize = NFS_MAX_FILE_IO_SIZE; 630f7b422b1SDavid Howells 631f7b422b1SDavid Howells return nfs_block_bits(bsize, nrbitsp); 632f7b422b1SDavid Howells } 633f7b422b1SDavid Howells 634f7b422b1SDavid Howells /* 635f7b422b1SDavid Howells * Determine the maximum file size for a superblock 636f7b422b1SDavid Howells */ 637f7b422b1SDavid Howells static inline 638f7b422b1SDavid Howells void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 639f7b422b1SDavid Howells { 640f7b422b1SDavid Howells sb->s_maxbytes = (loff_t)maxfilesize; 641f7b422b1SDavid Howells if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 642f7b422b1SDavid Howells sb->s_maxbytes = MAX_LFS_FILESIZE; 643f7b422b1SDavid Howells } 64449a70f27STrond Myklebust 64549a70f27STrond Myklebust /* 646d15bc38dSTom Haynes * Record the page as unstable and mark its inode as dirty. 647d15bc38dSTom Haynes */ 648d15bc38dSTom Haynes static inline 64986d80f97STrond Myklebust void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) 650d15bc38dSTom Haynes { 65186d80f97STrond Myklebust if (!cinfo->dreq) { 652d15bc38dSTom Haynes struct inode *inode = page_file_mapping(page)->host; 653d15bc38dSTom Haynes 65411fb9989SMel Gorman inc_node_page_state(page, NR_UNSTABLE_NFS); 65593f78d88STejun Heo inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE); 656d15bc38dSTom Haynes __mark_inode_dirty(inode, I_DIRTY_DATASYNC); 657d15bc38dSTom Haynes } 65886d80f97STrond Myklebust } 659d15bc38dSTom Haynes 660d15bc38dSTom Haynes /* 66149a70f27STrond Myklebust * Determine the number of bytes of data the page contains 66249a70f27STrond Myklebust */ 66349a70f27STrond Myklebust static inline 66449a70f27STrond Myklebust unsigned int nfs_page_length(struct page *page) 66549a70f27STrond Myklebust { 666d56b4ddfSMel Gorman loff_t i_size = i_size_read(page_file_mapping(page)->host); 66749a70f27STrond Myklebust 66849a70f27STrond Myklebust if (i_size > 0) { 6698cd79788SHuang Ying pgoff_t index = page_index(page); 67009cbfeafSKirill A. Shutemov pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; 6718cd79788SHuang Ying if (index < end_index) 67209cbfeafSKirill A. Shutemov return PAGE_SIZE; 6738cd79788SHuang Ying if (index == end_index) 67409cbfeafSKirill A. Shutemov return ((i_size - 1) & ~PAGE_MASK) + 1; 67549a70f27STrond Myklebust } 67649a70f27STrond Myklebust return 0; 67749a70f27STrond Myklebust } 6788d5658c9STrond Myklebust 6798d5658c9STrond Myklebust /* 6800b26a0bfSTrond Myklebust * Convert a umode to a dirent->d_type 6810b26a0bfSTrond Myklebust */ 6820b26a0bfSTrond Myklebust static inline 6830b26a0bfSTrond Myklebust unsigned char nfs_umode_to_dtype(umode_t mode) 6840b26a0bfSTrond Myklebust { 6850b26a0bfSTrond Myklebust return (mode >> 12) & 15; 6860b26a0bfSTrond Myklebust } 6870b26a0bfSTrond Myklebust 6880b26a0bfSTrond Myklebust /* 6898d5658c9STrond Myklebust * Determine the number of pages in an array of length 'len' and 6908d5658c9STrond Myklebust * with a base offset of 'base' 6918d5658c9STrond Myklebust */ 6928d5658c9STrond Myklebust static inline 6938d5658c9STrond Myklebust unsigned int nfs_page_array_len(unsigned int base, size_t len) 6948d5658c9STrond Myklebust { 6958d5658c9STrond Myklebust return ((unsigned long)len + (unsigned long)base + 6968d5658c9STrond Myklebust PAGE_SIZE - 1) >> PAGE_SHIFT; 6978d5658c9STrond Myklebust } 6980110ee15STrond Myklebust 6993a1556e8STrond Myklebust /* 7003a1556e8STrond Myklebust * Convert a struct timespec into a 64-bit change attribute 7013a1556e8STrond Myklebust * 7023a1556e8STrond Myklebust * This does approximately the same thing as timespec_to_ns(), 7033a1556e8STrond Myklebust * but for calculation efficiency, we multiply the seconds by 7043a1556e8STrond Myklebust * 1024*1024*1024. 7053a1556e8STrond Myklebust */ 7063a1556e8STrond Myklebust static inline 707e86d5a02STrond Myklebust u64 nfs_timespec_to_change_attr(const struct timespec64 *ts) 7083a1556e8STrond Myklebust { 7093a1556e8STrond Myklebust return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 7103a1556e8STrond Myklebust } 7111264a2f0STrond Myklebust 7121264a2f0STrond Myklebust #ifdef CONFIG_CRC32 7131264a2f0STrond Myklebust /** 7141264a2f0STrond Myklebust * nfs_fhandle_hash - calculate the crc32 hash for the filehandle 7151264a2f0STrond Myklebust * @fh - pointer to filehandle 7161264a2f0STrond Myklebust * 7171264a2f0STrond Myklebust * returns a crc32 hash for the filehandle that is compatible with 7181264a2f0STrond Myklebust * the one displayed by "wireshark". 7191264a2f0STrond Myklebust */ 7201264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7211264a2f0STrond Myklebust { 7221264a2f0STrond Myklebust return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); 7231264a2f0STrond Myklebust } 72448c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) 72548c9579aSOlga Kornievskaia { 72648c9579aSOlga Kornievskaia return ~crc32_le(0xFFFFFFFF, &stateid->other[0], 72748c9579aSOlga Kornievskaia NFS4_STATEID_OTHER_SIZE); 72848c9579aSOlga Kornievskaia } 7291264a2f0STrond Myklebust #else 7301264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7311264a2f0STrond Myklebust { 7321264a2f0STrond Myklebust return 0; 7331264a2f0STrond Myklebust } 73448c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) 73548c9579aSOlga Kornievskaia { 73648c9579aSOlga Kornievskaia return 0; 73748c9579aSOlga Kornievskaia } 7381264a2f0STrond Myklebust #endif 7390bcbf039SPeng Tao 7400bcbf039SPeng Tao static inline bool nfs_error_is_fatal(int err) 7410bcbf039SPeng Tao { 7420bcbf039SPeng Tao switch (err) { 7430bcbf039SPeng Tao case -ERESTARTSYS: 7447dc58ca5STrond Myklebust case -EINTR: 74554551d85STrond Myklebust case -EACCES: 74654551d85STrond Myklebust case -EDQUOT: 74754551d85STrond Myklebust case -EFBIG: 7480bcbf039SPeng Tao case -EIO: 7490bcbf039SPeng Tao case -ENOSPC: 7500bcbf039SPeng Tao case -EROFS: 75154551d85STrond Myklebust case -ESTALE: 7520bcbf039SPeng Tao case -E2BIG: 7532dc23affSTrond Myklebust case -ENOMEM: 75411982a7cSTrond Myklebust case -ETIMEDOUT: 7550bcbf039SPeng Tao return true; 7560bcbf039SPeng Tao default: 7570bcbf039SPeng Tao return false; 7580bcbf039SPeng Tao } 7590bcbf039SPeng Tao } 760bf4b4905SNeilBrown 7618f54c7a4STrond Myklebust static inline bool nfs_error_is_fatal_on_server(int err) 7628f54c7a4STrond Myklebust { 7638f54c7a4STrond Myklebust switch (err) { 7648f54c7a4STrond Myklebust case 0: 7658f54c7a4STrond Myklebust case -ERESTARTSYS: 7668f54c7a4STrond Myklebust case -EINTR: 7678f54c7a4STrond Myklebust return false; 7688f54c7a4STrond Myklebust } 7698f54c7a4STrond Myklebust return nfs_error_is_fatal(err); 7708f54c7a4STrond Myklebust } 7719954bf92SDavid Howells 7729954bf92SDavid Howells /* 7739954bf92SDavid Howells * Select between a default port value and a user-specified port value. 7749954bf92SDavid Howells * If a zero value is set, then autobind will be used. 7759954bf92SDavid Howells */ 7769954bf92SDavid Howells static inline void nfs_set_port(struct sockaddr *sap, int *port, 7779954bf92SDavid Howells const unsigned short default_port) 7789954bf92SDavid Howells { 7799954bf92SDavid Howells if (*port == NFS_UNSPEC_PORT) 7809954bf92SDavid Howells *port = default_port; 7819954bf92SDavid Howells 7829954bf92SDavid Howells rpc_set_port(sap, *port); 7839954bf92SDavid Howells } 784