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 36f7b37b8bSTrond Myklebust static inline bool nfs_lookup_is_soft_revalidate(const struct dentry *dentry) 37f7b37b8bSTrond Myklebust { 38f7b37b8bSTrond Myklebust if (!(NFS_SB(dentry->d_sb)->flags & NFS_MOUNT_SOFTREVAL)) 39f7b37b8bSTrond Myklebust return false; 40f7b37b8bSTrond Myklebust if (!d_is_positive(dentry) || !NFS_FH(d_inode(dentry))->size) 41f7b37b8bSTrond Myklebust return false; 42f7b37b8bSTrond Myklebust return true; 43f7b37b8bSTrond Myklebust } 44f7b37b8bSTrond Myklebust 456b18eaa0S\"Talpey, Thomas\ /* 46a14017dbSChuck Lever * Note: RFC 1813 doesn't limit the number of auth flavors that 47a14017dbSChuck Lever * a server can return, so make something up. 48a14017dbSChuck Lever */ 49a14017dbSChuck Lever #define NFS_MAX_SECFLAVORS (12) 50a14017dbSChuck Lever 51a14017dbSChuck Lever /* 524cfd74fcSChuck Lever * Value used if the user did not specify a port value. 534cfd74fcSChuck Lever */ 544cfd74fcSChuck Lever #define NFS_UNSPEC_PORT (-1) 554cfd74fcSChuck Lever 56a956bedaSTrond Myklebust #define NFS_UNSPEC_RETRANS (UINT_MAX) 57a956bedaSTrond Myklebust #define NFS_UNSPEC_TIMEO (UINT_MAX) 58a956bedaSTrond Myklebust 594cfd74fcSChuck Lever /* 6056e4ebf8SBryan Schumaker * Maximum number of pages that readdir can use for creating 6156e4ebf8SBryan Schumaker * a vmapped array of pages. 6256e4ebf8SBryan Schumaker */ 63db531db9SMax Kellermann #define NFS_MAX_READDIR_PAGES 8 6456e4ebf8SBryan Schumaker 65fcf10398SBryan Schumaker struct nfs_client_initdata { 66fcf10398SBryan Schumaker unsigned long init_flags; 675c6e5b60STrond Myklebust const char *hostname; /* Hostname of the server */ 685c6e5b60STrond Myklebust const struct sockaddr *addr; /* Address of the server */ 695c6e5b60STrond Myklebust const char *nodename; /* Hostname of the client */ 705c6e5b60STrond Myklebust const char *ip_addr; /* IP address of the client */ 71fcf10398SBryan Schumaker size_t addrlen; 72ab7017a3SBryan Schumaker struct nfs_subversion *nfs_mod; 73fcf10398SBryan Schumaker int proto; 74fcf10398SBryan Schumaker u32 minorversion; 756619079dSTrond Myklebust unsigned int nconnect; 76fcf10398SBryan Schumaker struct net *net; 775c6e5b60STrond Myklebust const struct rpc_timeout *timeparms; 781a58e8a0STrond Myklebust const struct cred *cred; 79fcf10398SBryan Schumaker }; 80fcf10398SBryan Schumaker 8156e4ebf8SBryan Schumaker /* 826b18eaa0S\"Talpey, Thomas\ * In-kernel mount arguments 836b18eaa0S\"Talpey, Thomas\ */ 845eb005caSDavid Howells struct nfs_fs_context { 85f2aedb71SDavid Howells bool internal; 86f2aedb71SDavid Howells bool skip_reconfig_option_check; 87f2aedb71SDavid Howells bool need_mount; 88f2aedb71SDavid Howells bool sloppy; 89e558100fSDavid Howells unsigned int flags; /* NFS{,4}_MOUNT_* flags */ 908cb7f74eSChuck Lever unsigned int rsize, wsize; 918cb7f74eSChuck Lever unsigned int timeo, retrans; 92e558100fSDavid Howells unsigned int acregmin, acregmax; 93e558100fSDavid Howells unsigned int acdirmin, acdirmax; 948cb7f74eSChuck Lever unsigned int namlen; 95b797cac7SDavid Howells unsigned int options; 966b18eaa0S\"Talpey, Thomas\ unsigned int bsize; 97a3f73c27SWeston Andros Adamson struct nfs_auth_info auth_info; 98a3f73c27SWeston Andros Adamson rpc_authflavor_t selected_flavor; 996b18eaa0S\"Talpey, Thomas\ char *client_address; 100764302ccSChuck Lever unsigned int version; 1013fd5be9eSMike Sager unsigned int minorversion; 10208734048SDavid Howells char *fscache_uniq; 103f8ee01e3SDavid Howells unsigned short protofamily; 104f8ee01e3SDavid Howells unsigned short mountfamily; 1056b18eaa0S\"Talpey, Thomas\ 1066b18eaa0S\"Talpey, Thomas\ struct { 107e558100fSDavid Howells union { 108e558100fSDavid Howells struct sockaddr address; 109e558100fSDavid Howells struct sockaddr_storage _address; 110e558100fSDavid Howells }; 1114c568017SChuck Lever size_t addrlen; 1126b18eaa0S\"Talpey, Thomas\ char *hostname; 11378fa701fSChuck Lever u32 version; 1144cfd74fcSChuck Lever int port; 11578fa701fSChuck Lever unsigned short protocol; 1166b18eaa0S\"Talpey, Thomas\ } mount_server; 1176b18eaa0S\"Talpey, Thomas\ 1186b18eaa0S\"Talpey, Thomas\ struct { 119e558100fSDavid Howells union { 120e558100fSDavid Howells struct sockaddr address; 121e558100fSDavid Howells struct sockaddr_storage _address; 122e558100fSDavid Howells }; 1234c568017SChuck Lever size_t addrlen; 1246b18eaa0S\"Talpey, Thomas\ char *hostname; 1256b18eaa0S\"Talpey, Thomas\ char *export_path; 1264cfd74fcSChuck Lever int port; 12778fa701fSChuck Lever unsigned short protocol; 12828cc5cd8STrond Myklebust unsigned short nconnect; 129f2aedb71SDavid Howells unsigned short export_path_len; 1306b18eaa0S\"Talpey, Thomas\ } nfs_server; 131f9c3a380SEric Paris 13262a55d08SScott Mayhew struct nfs_fh *mntfh; 13362a55d08SScott Mayhew struct nfs_server *server; 13462a55d08SScott Mayhew struct nfs_subversion *nfs_mod; 13548be8a66SDavid Howells 13662a55d08SScott Mayhew /* Information for a cloned mount. */ 13762a55d08SScott Mayhew struct nfs_clone_mount { 13862a55d08SScott Mayhew struct super_block *sb; 13962a55d08SScott Mayhew struct dentry *dentry; 14062a55d08SScott Mayhew struct nfs_fattr *fattr; 14162a55d08SScott Mayhew unsigned int inherited_bsize; 14262a55d08SScott Mayhew } clone_data; 1436b18eaa0S\"Talpey, Thomas\ }; 1446b18eaa0S\"Talpey, Thomas\ 145ce8866f0SScott Mayhew #define nfs_errorf(fc, fmt, ...) errorf(fc, fmt, ## __VA_ARGS__) 146ce8866f0SScott Mayhew #define nfs_invalf(fc, fmt, ...) invalf(fc, fmt, ## __VA_ARGS__) 147ce8866f0SScott Mayhew #define nfs_warnf(fc, fmt, ...) warnf(fc, fmt, ## __VA_ARGS__) 148ce8866f0SScott Mayhew 149f2aedb71SDavid Howells static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc) 150f2aedb71SDavid Howells { 151f2aedb71SDavid Howells return fc->fs_private; 152f2aedb71SDavid Howells } 153f2aedb71SDavid Howells 154146ec944SChuck Lever /* mount_clnt.c */ 155c5d120f8SChuck Lever struct nfs_mount_request { 156c5d120f8SChuck Lever struct sockaddr *sap; 157c5d120f8SChuck Lever size_t salen; 158c5d120f8SChuck Lever char *hostname; 159c5d120f8SChuck Lever char *dirpath; 160c5d120f8SChuck Lever u32 version; 161c5d120f8SChuck Lever unsigned short protocol; 162c5d120f8SChuck Lever struct nfs_fh *fh; 16350a737f8SChuck Lever int noresvport; 1648e02f6b9SChuck Lever unsigned int *auth_flav_len; 1658e02f6b9SChuck Lever rpc_authflavor_t *auth_flavs; 1666d59b8d5SStanislav Kinsbursky struct net *net; 167c5d120f8SChuck Lever }; 168c5d120f8SChuck Lever 169c5d120f8SChuck Lever extern int nfs_mount(struct nfs_mount_request *info); 1700b524123SChuck Lever extern void nfs_umount(const struct nfs_mount_request *info); 171146ec944SChuck Lever 17224c8dbbbSDavid Howells /* client.c */ 173a613fa16STrond Myklebust extern const struct rpc_program nfs_program; 1746b13168bSStanislav Kinsbursky extern void nfs_clients_init(struct net *net); 17510b7a70cSTrond Myklebust extern void nfs_clients_exit(struct net *net); 1766663ee7fSBryan Schumaker extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); 1775c6e5b60STrond Myklebust int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t); 1787d38de3fSAnna Schumaker struct nfs_client *nfs_get_client(const struct nfs_client_initdata *); 179fcf10398SBryan Schumaker int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); 180fcf10398SBryan Schumaker void nfs_server_insert_lists(struct nfs_server *); 18132e62b7cSChuck Lever void nfs_server_remove_lists(struct nfs_server *); 182a956bedaSTrond Myklebust void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans); 183fcf10398SBryan Schumaker int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, 184fcf10398SBryan Schumaker rpc_authflavor_t); 185fcf10398SBryan Schumaker struct nfs_server *nfs_alloc_server(void); 186fcf10398SBryan Schumaker void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); 18754ceac45SDavid Howells 18824c8dbbbSDavid Howells extern void nfs_put_client(struct nfs_client *); 189cdb7ecedSBryan Schumaker extern void nfs_free_client(struct nfs_client *); 19028cd1b3fSStanislav Kinsbursky extern struct nfs_client *nfs4_find_client_ident(struct net *, int); 191c36fca52SAndy Adamson extern struct nfs_client * 192c7add9a9SStanislav Kinsbursky nfs4_find_client_sessionid(struct net *, const struct sockaddr *, 193459de2edSBryan Schumaker struct nfs4_sessionid *, u32); 19462a55d08SScott Mayhew extern struct nfs_server *nfs_create_server(struct fs_context *); 19562a55d08SScott Mayhew extern struct nfs_server *nfs4_create_server(struct fs_context *); 19662a55d08SScott Mayhew extern struct nfs_server *nfs4_create_referral_server(struct fs_context *); 19732e62b7cSChuck Lever extern int nfs4_update_server(struct nfs_server *server, const char *hostname, 198292f503cSTrond Myklebust struct sockaddr *sap, size_t salen, 199292f503cSTrond Myklebust struct net *net); 20054ceac45SDavid Howells extern void nfs_free_server(struct nfs_server *server); 20154ceac45SDavid Howells extern struct nfs_server *nfs_clone_server(struct nfs_server *, 20254ceac45SDavid Howells struct nfs_fh *, 2037e6eb683SBryan Schumaker struct nfs_fattr *, 2047e6eb683SBryan Schumaker rpc_authflavor_t); 205a33e4b03SWeston Andros Adamson extern bool nfs_client_init_is_complete(const struct nfs_client *clp); 206a33e4b03SWeston Andros Adamson extern int nfs_client_init_status(const struct nfs_client *clp); 2074697bd5eSTrond Myklebust extern int nfs_wait_client_init_complete(const struct nfs_client *clp); 20876db6d95SAndy Adamson extern void nfs_mark_client_ready(struct nfs_client *clp, int state); 2093fc75f12STigran Mkrtchyan extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, 210d83217c1SAndy Adamson const struct sockaddr *ds_addr, 21198fc685aSAndy Adamson int ds_addrlen, int ds_proto, 21298fc685aSAndy Adamson unsigned int ds_timeo, 213064172f3SPeng Tao unsigned int ds_retrans, 2147d38de3fSAnna Schumaker u32 minor_version); 2150e20162eSAndy Adamson extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, 2160e20162eSAndy Adamson struct inode *); 217b224f7cbSTigran Mkrtchyan extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, 2181a04c6e1SPeng Tao const struct sockaddr *ds_addr, int ds_addrlen, 2191a04c6e1SPeng Tao int ds_proto, unsigned int ds_timeo, 2207d38de3fSAnna Schumaker unsigned int ds_retrans); 2216aaca566SDavid Howells #ifdef CONFIG_PROC_FS 2226aaca566SDavid Howells extern int __init nfs_fs_proc_init(void); 2236aaca566SDavid Howells extern void nfs_fs_proc_exit(void); 22465b38851SEric W. Biederman extern int nfs_fs_proc_net_init(struct net *net); 22565b38851SEric W. Biederman extern void nfs_fs_proc_net_exit(struct net *net); 2266aaca566SDavid Howells #else 22765b38851SEric W. Biederman static inline int nfs_fs_proc_net_init(struct net *net) 22865b38851SEric W. Biederman { 22965b38851SEric W. Biederman return 0; 23065b38851SEric W. Biederman } 23165b38851SEric W. Biederman static inline void nfs_fs_proc_net_exit(struct net *net) 23265b38851SEric W. Biederman { 23365b38851SEric W. Biederman } 2346aaca566SDavid Howells static inline int nfs_fs_proc_init(void) 2356aaca566SDavid Howells { 2366aaca566SDavid Howells return 0; 2376aaca566SDavid Howells } 2386aaca566SDavid Howells static inline void nfs_fs_proc_exit(void) 2396aaca566SDavid Howells { 2406aaca566SDavid Howells } 2416aaca566SDavid Howells #endif 24224c8dbbbSDavid Howells 243f7b422b1SDavid Howells /* callback_xdr.c */ 244e9679189SChristoph Hellwig extern const struct svc_version nfs4_callback_version1; 245e9679189SChristoph Hellwig extern const struct svc_version nfs4_callback_version4; 246f7b422b1SDavid Howells 247f2aedb71SDavid Howells /* fs_context.c */ 248f2aedb71SDavid Howells extern struct file_system_type nfs_fs_type; 2499954bf92SDavid Howells 250f7b422b1SDavid Howells /* pagelist.c */ 251f7b422b1SDavid Howells extern int __init nfs_init_nfspagecache(void); 252266bee88SDavid Brownell extern void nfs_destroy_nfspagecache(void); 253f7b422b1SDavid Howells extern int __init nfs_init_readpagecache(void); 254266bee88SDavid Brownell extern void nfs_destroy_readpagecache(void); 255f7b422b1SDavid Howells extern int __init nfs_init_writepagecache(void); 256266bee88SDavid Brownell extern void nfs_destroy_writepagecache(void); 257f7b422b1SDavid Howells 258f7b422b1SDavid Howells extern int __init nfs_init_directcache(void); 259266bee88SDavid Brownell extern void nfs_destroy_directcache(void); 2604db6e0b7SFred Isaman extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 2614db6e0b7SFred Isaman struct nfs_pgio_header *hdr, 2624db6e0b7SFred Isaman void (*release)(struct nfs_pgio_header *hdr)); 2634db6e0b7SFred Isaman void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 264210c7c17SBenjamin Coddington int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); 265577b4232STrond Myklebust 26641d8d5b7SAnna Schumaker extern const struct nfs_pageio_ops nfs_pgio_rw_ops; 2671e7f3a48SWeston Andros Adamson struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); 2681e7f3a48SWeston Andros Adamson void nfs_pgio_header_free(struct nfs_pgio_header *); 269ef2c488cSAnna Schumaker int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); 27046a5ab47SPeng Tao int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, 271a52458b4SNeilBrown const struct cred *cred, const struct nfs_rpc_ops *rpc_ops, 27246a5ab47SPeng Tao const struct rpc_call_ops *call_ops, int how, int flags); 273d4581383SWeston Andros Adamson void nfs_free_request(struct nfs_page *req); 27448d635f1SPeng Tao struct nfs_pgio_mirror * 27548d635f1SPeng Tao nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); 27600bfa30aSAnna Schumaker 27747af81f2SPeng Tao static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc) 27847af81f2SPeng Tao { 27947af81f2SPeng Tao WARN_ON_ONCE(desc->pg_mirror_count < 1); 28047af81f2SPeng Tao return desc->pg_mirror_count > 1; 28147af81f2SPeng Tao } 28247af81f2SPeng Tao 283138a2935STrond Myklebust static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, 284138a2935STrond Myklebust const struct nfs_open_context *ctx2) 285138a2935STrond Myklebust { 286a52458b4SNeilBrown return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state; 287138a2935STrond Myklebust } 288138a2935STrond Myklebust 289f7b422b1SDavid Howells /* nfs2xdr.c */ 290499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs_procedures[]; 291573c4e1eSChuck Lever extern int nfs2_decode_dirent(struct xdr_stream *, 292a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 293f7b422b1SDavid Howells 294f7b422b1SDavid Howells /* nfs3xdr.c */ 295499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs3_procedures[]; 296573c4e1eSChuck Lever extern int nfs3_decode_dirent(struct xdr_stream *, 297a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 298f7b422b1SDavid Howells 299f7b422b1SDavid Howells /* nfs4xdr.c */ 30089d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 301573c4e1eSChuck Lever extern int nfs4_decode_dirent(struct xdr_stream *, 302a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 3037d4e2747SDavid Howells #endif 3042449ea2eSAlexandros Batsakis #ifdef CONFIG_NFS_V4_1 3052449ea2eSAlexandros Batsakis extern const u32 nfs41_maxread_overhead; 3062449ea2eSAlexandros Batsakis extern const u32 nfs41_maxwrite_overhead; 307f1c097beSAndy Adamson extern const u32 nfs41_maxgetdevinfo_overhead; 3082449ea2eSAlexandros Batsakis #endif 309f7b422b1SDavid Howells 310f7b422b1SDavid Howells /* nfs4proc.c */ 31189d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 312499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs4_procedures[]; 313d75d5414SAndrew Morton #endif 314f7b422b1SDavid Howells 315694e096fSAnna Schumaker #ifdef CONFIG_NFS_V4_SECURITY_LABEL 316694e096fSAnna Schumaker extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); 317a49c2691SKinglong Mee static inline struct nfs4_label * 318a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 319a49c2691SKinglong Mee { 320a49c2691SKinglong Mee if (!dst || !src) 321a49c2691SKinglong Mee return NULL; 322a49c2691SKinglong Mee 323a49c2691SKinglong Mee if (src->len > NFS4_MAXLABELLEN) 324a49c2691SKinglong Mee return NULL; 325a49c2691SKinglong Mee 326a49c2691SKinglong Mee dst->lfs = src->lfs; 327a49c2691SKinglong Mee dst->pi = src->pi; 328a49c2691SKinglong Mee dst->len = src->len; 329a49c2691SKinglong Mee memcpy(dst->label, src->label, src->len); 330a49c2691SKinglong Mee 331a49c2691SKinglong Mee return dst; 332a49c2691SKinglong Mee } 333694e096fSAnna Schumaker static inline void nfs4_label_free(struct nfs4_label *label) 334694e096fSAnna Schumaker { 335694e096fSAnna Schumaker if (label) { 336694e096fSAnna Schumaker kfree(label->label); 337694e096fSAnna Schumaker kfree(label); 338694e096fSAnna Schumaker } 339694e096fSAnna Schumaker return; 340694e096fSAnna Schumaker } 341fd1defc2STrond Myklebust 342fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 343fd1defc2STrond Myklebust { 344fd1defc2STrond Myklebust if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) 345fd1defc2STrond Myklebust nfsi->cache_validity |= NFS_INO_INVALID_LABEL; 346fd1defc2STrond Myklebust } 347694e096fSAnna Schumaker #else 348694e096fSAnna Schumaker static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } 349694e096fSAnna Schumaker static inline void nfs4_label_free(void *label) {} 350fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 351fd1defc2STrond Myklebust { 352fd1defc2STrond Myklebust } 353a49c2691SKinglong Mee static inline struct nfs4_label * 354a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 355a49c2691SKinglong Mee { 356a49c2691SKinglong Mee return NULL; 357a49c2691SKinglong Mee } 358694e096fSAnna Schumaker #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 359694e096fSAnna Schumaker 3607fe5c398STrond Myklebust /* proc.c */ 3617fe5c398STrond Myklebust void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 3628cab4c39SChuck Lever extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 3635c6e5b60STrond Myklebust const struct nfs_client_initdata *); 3647fe5c398STrond Myklebust 365979df72eSTrond Myklebust /* dir.c */ 3661bcf4c5cSTrond Myklebust extern void nfs_advise_use_readdirplus(struct inode *dir); 367311324adSTrond Myklebust extern void nfs_force_use_readdirplus(struct inode *dir); 3681ab6c499SDave Chinner extern unsigned long nfs_access_cache_count(struct shrinker *shrink, 3691ab6c499SDave Chinner struct shrink_control *sc); 3701ab6c499SDave Chinner extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, 3711495f230SYing Han struct shrink_control *sc); 372597d9289SBryan Schumaker struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 373597d9289SBryan Schumaker int nfs_create(struct inode *, struct dentry *, umode_t, bool); 374597d9289SBryan Schumaker int nfs_mkdir(struct inode *, struct dentry *, umode_t); 375597d9289SBryan Schumaker int nfs_rmdir(struct inode *, struct dentry *); 376597d9289SBryan Schumaker int nfs_unlink(struct inode *, struct dentry *); 377597d9289SBryan Schumaker int nfs_symlink(struct inode *, struct dentry *, const char *); 378597d9289SBryan Schumaker int nfs_link(struct dentry *, struct inode *, struct dentry *); 379597d9289SBryan Schumaker int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); 3801cd66c93SMiklos Szeredi int nfs_rename(struct inode *, struct dentry *, 3811cd66c93SMiklos Szeredi struct inode *, struct dentry *, unsigned int); 382979df72eSTrond Myklebust 383ce4ef7c0SBryan Schumaker /* file.c */ 3844ff79bc7SChristoph Hellwig int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 385ce4ef7c0SBryan Schumaker loff_t nfs_file_llseek(struct file *, loff_t, int); 3863aa2d199SAl Viro ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); 387ce4ef7c0SBryan Schumaker int nfs_file_mmap(struct file *, struct vm_area_struct *); 388edaf4369SAl Viro ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); 389ce4ef7c0SBryan Schumaker int nfs_file_release(struct inode *, struct file *); 390ce4ef7c0SBryan Schumaker int nfs_lock(struct file *, int, struct file_lock *); 391ce4ef7c0SBryan Schumaker int nfs_flock(struct file *, int, struct file_lock *); 392ce4ef7c0SBryan Schumaker int nfs_check_flags(int); 393ce4ef7c0SBryan Schumaker 394f7b422b1SDavid Howells /* inode.c */ 3955746006fSTrond Myklebust extern struct workqueue_struct *nfsiod_workqueue; 396f7b422b1SDavid Howells extern struct inode *nfs_alloc_inode(struct super_block *sb); 397ca1a199eSAl Viro extern void nfs_free_inode(struct inode *); 398a9185b41SChristoph Hellwig extern int nfs_write_inode(struct inode *, struct writeback_control *); 399eed99357STrond Myklebust extern int nfs_drop_inode(struct inode *); 40019d87ca3SBryan Schumaker extern void nfs_clear_inode(struct inode *); 401b57922d9SAl Viro extern void nfs_evict_inode(struct inode *); 402f41f7418STrond Myklebust void nfs_zap_acl_cache(struct inode *inode); 40361540bf6STrond Myklebust extern bool nfs_check_cache_invalid(struct inode *, unsigned long); 404dfd01f02SPeter Zijlstra extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); 4055e4def20SDavid Howells extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode); 406f7b422b1SDavid Howells 407f7b422b1SDavid Howells /* super.c */ 4086a74490dSBryan Schumaker extern const struct super_operations nfs_sops; 4094d4b69ddSWeston Andros Adamson bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); 410f2aedb71SDavid Howells int nfs_try_get_tree(struct fs_context *); 411f2aedb71SDavid Howells int nfs_get_tree_common(struct fs_context *); 412fbdefd64SBryan Schumaker void nfs_kill_super(struct super_block *); 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); 439f2aedb71SDavid Howells int nfs_submount(struct fs_context *, struct nfs_server *); 440f2aedb71SDavid Howells int nfs_do_submount(struct fs_context *); 441f7b422b1SDavid Howells 44254ceac45SDavid Howells /* getroot.c */ 44362a55d08SScott Mayhew extern int nfs_get_root(struct super_block *s, struct fs_context *fc); 44489d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 4455e6b1990STrond Myklebust extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); 4467d4e2747SDavid Howells #endif 447f7b422b1SDavid Howells 448061ae2edSFred Isaman struct nfs_pgio_completion_ops; 449f11c88afSAndy Adamson /* read.c */ 450584aa810SFred Isaman extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 451fab5fc25SChristoph Hellwig struct inode *inode, bool force_mds, 452584aa810SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 453f11c88afSAndy Adamson extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 454493292ddSTrond Myklebust extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 455e885de1aSTrond Myklebust 456fbdefd64SBryan Schumaker /* super.c */ 457fbdefd64SBryan Schumaker void nfs_umount_begin(struct super_block *); 458fbdefd64SBryan Schumaker int nfs_statfs(struct dentry *, struct kstatfs *); 459fbdefd64SBryan Schumaker int nfs_show_options(struct seq_file *, struct dentry *); 460fbdefd64SBryan Schumaker int nfs_show_devname(struct seq_file *, struct dentry *); 461fbdefd64SBryan Schumaker int nfs_show_path(struct seq_file *, struct dentry *); 462fbdefd64SBryan Schumaker int nfs_show_stats(struct seq_file *, struct dentry *); 463f2aedb71SDavid Howells int nfs_reconfigure(struct fs_context *); 464fbdefd64SBryan Schumaker 465def6ed7eSAndy Adamson /* write.c */ 4661763da12SFred Isaman extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 467a20c93e3SChristoph Hellwig struct inode *inode, int ioflags, bool force_mds, 4681763da12SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 469dce81290STrond Myklebust extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 4700b7c0153SFred Isaman extern void nfs_commit_free(struct nfs_commit_data *p); 471def6ed7eSAndy Adamson extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 4720b7c0153SFred Isaman extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 4730b7c0153SFred Isaman extern int nfs_initiate_commit(struct rpc_clnt *clnt, 4740b7c0153SFred Isaman struct nfs_commit_data *data, 475c36aae9aSPeng Tao const struct nfs_rpc_ops *nfs_ops, 476e0c2b380SFred Isaman const struct rpc_call_ops *call_ops, 4779f0ec176SAndy Adamson int how, int flags); 4780b7c0153SFred Isaman extern void nfs_init_commit(struct nfs_commit_data *data, 479e0c2b380SFred Isaman struct list_head *head, 480f453a54aSFred Isaman struct pnfs_layout_segment *lseg, 481f453a54aSFred Isaman struct nfs_commit_info *cinfo); 4821763da12SFred Isaman int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 4831763da12SFred Isaman struct nfs_commit_info *cinfo, int max); 484ce59515cSAnna Schumaker unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); 4851763da12SFred Isaman int nfs_scan_commit(struct inode *inode, struct list_head *dst, 4861763da12SFred Isaman struct nfs_commit_info *cinfo); 4871763da12SFred Isaman void nfs_mark_request_commit(struct nfs_page *req, 4881763da12SFred Isaman struct pnfs_layout_segment *lseg, 489b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 490b57ff130SWeston Andros Adamson u32 ds_commit_idx); 491c65e6254SWeston Andros Adamson int nfs_write_need_commit(struct nfs_pgio_header *); 492a08a8cd3STrond Myklebust void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); 4931763da12SFred Isaman int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 4941763da12SFred Isaman int how, struct nfs_commit_info *cinfo); 495e0c2b380SFred Isaman void nfs_retry_commit(struct list_head *page_list, 496ea2cf228SFred Isaman struct pnfs_layout_segment *lseg, 497b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 498b57ff130SWeston Andros Adamson u32 ds_commit_idx); 4990b7c0153SFred Isaman void nfs_commitdata_release(struct nfs_commit_data *data); 5006272dcc6SAnna Schumaker void nfs_request_add_commit_list(struct nfs_page *req, 501ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 50286d80f97STrond Myklebust void nfs_request_add_commit_list_locked(struct nfs_page *req, 50386d80f97STrond Myklebust struct list_head *dst, 50486d80f97STrond Myklebust struct nfs_commit_info *cinfo); 505ea2cf228SFred Isaman void nfs_request_remove_commit_list(struct nfs_page *req, 506ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 507ea2cf228SFred Isaman void nfs_init_cinfo(struct nfs_commit_info *cinfo, 508ea2cf228SFred Isaman struct inode *inode, 509ea2cf228SFred Isaman struct nfs_direct_req *dreq); 510dc24826bSAndy Adamson int nfs_key_timeout_notify(struct file *filp, struct inode *inode); 511ce52914eSScott Mayhew bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode); 512a7d42ddbSWeston Andros Adamson void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); 513e0c2b380SFred Isaman 514837bb1d7STrond Myklebust int nfs_filemap_write_and_wait_range(struct address_space *mapping, 515837bb1d7STrond Myklebust loff_t lstart, loff_t lend); 516837bb1d7STrond Myklebust 517a5314a74STrond Myklebust #ifdef CONFIG_NFS_V4_1 518a5314a74STrond Myklebust static inline 519a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 520a5314a74STrond Myklebust { 521a5314a74STrond Myklebust int i; 522a5314a74STrond Myklebust 523a5314a74STrond Myklebust for (i = 0; i < cinfo->nbuckets; i++) 524a5314a74STrond Myklebust cinfo->buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; 525a5314a74STrond Myklebust } 526a5314a74STrond Myklebust #else 527a5314a74STrond Myklebust static inline 528a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 529a5314a74STrond Myklebust { 530a5314a74STrond Myklebust } 531a5314a74STrond Myklebust #endif 532a5314a74STrond Myklebust 533074cc1deSTrond Myklebust #ifdef CONFIG_MIGRATION 534074cc1deSTrond Myklebust extern int nfs_migrate_page(struct address_space *, 535a6bc32b8SMel Gorman struct page *, struct page *, enum migrate_mode); 536074cc1deSTrond Myklebust #endif 537def6ed7eSAndy Adamson 5388fc3c386STrond Myklebust static inline int 5398fc3c386STrond Myklebust nfs_write_verifier_cmp(const struct nfs_write_verifier *v1, 5408fc3c386STrond Myklebust const struct nfs_write_verifier *v2) 5418fc3c386STrond Myklebust { 5428fc3c386STrond Myklebust return memcmp(v1->data, v2->data, sizeof(v1->data)); 5438fc3c386STrond Myklebust } 5448fc3c386STrond Myklebust 5450e862a40SJeff Layton /* unlink.c */ 5460e862a40SJeff Layton extern struct rpc_task * 5470e862a40SJeff Layton nfs_async_rename(struct inode *old_dir, struct inode *new_dir, 5480e862a40SJeff Layton struct dentry *old_dentry, struct dentry *new_dentry, 5490e862a40SJeff Layton void (*complete)(struct rpc_task *, struct nfs_renamedata *)); 5500e862a40SJeff Layton extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); 5510e862a40SJeff Layton 5521763da12SFred Isaman /* direct.c */ 5531763da12SFred Isaman void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, 5541763da12SFred Isaman struct nfs_direct_req *dreq); 5556296556fSPeng Tao extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); 5561763da12SFred Isaman 557cccef3b9SAndy Adamson /* nfs4proc.c */ 5588cab4c39SChuck Lever extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 5595c6e5b60STrond Myklebust const struct nfs_client_initdata *); 56005f4c350SChuck Lever extern int nfs40_walk_client_list(struct nfs_client *clp, 56105f4c350SChuck Lever struct nfs_client **result, 562a52458b4SNeilBrown const struct cred *cred); 56305f4c350SChuck Lever extern int nfs41_walk_client_list(struct nfs_client *clp, 56405f4c350SChuck Lever struct nfs_client **result, 565a52458b4SNeilBrown const struct cred *cred); 56610e037d1SSantosh kumar pradhan extern void nfs4_test_session_trunk(struct rpc_clnt *clnt, 56710e037d1SSantosh kumar pradhan struct rpc_xprt *xprt, 56810e037d1SSantosh kumar pradhan void *data); 569cccef3b9SAndy Adamson 570ea7c38feSTrond Myklebust static inline struct inode *nfs_igrab_and_active(struct inode *inode) 571ea7c38feSTrond Myklebust { 572ea7c38feSTrond Myklebust inode = igrab(inode); 573ea7c38feSTrond Myklebust if (inode != NULL && !nfs_sb_active(inode->i_sb)) { 574ea7c38feSTrond Myklebust iput(inode); 575ea7c38feSTrond Myklebust inode = NULL; 576ea7c38feSTrond Myklebust } 577ea7c38feSTrond Myklebust return inode; 578ea7c38feSTrond Myklebust } 579ea7c38feSTrond Myklebust 580ea7c38feSTrond Myklebust static inline void nfs_iput_and_deactive(struct inode *inode) 581ea7c38feSTrond Myklebust { 582ea7c38feSTrond Myklebust if (inode != NULL) { 583ea7c38feSTrond Myklebust struct super_block *sb = inode->i_sb; 584ea7c38feSTrond Myklebust 585ea7c38feSTrond Myklebust iput(inode); 586ea7c38feSTrond Myklebust nfs_sb_deactive(sb); 587ea7c38feSTrond Myklebust } 588ea7c38feSTrond Myklebust } 589ea7c38feSTrond Myklebust 590557134a3SAndy Adamson /* 591f7b422b1SDavid Howells * Determine the device name as a string 592f7b422b1SDavid Howells */ 593b514f872SAl Viro static inline char *nfs_devname(struct dentry *dentry, 594f7b422b1SDavid Howells char *buffer, ssize_t buflen) 595f7b422b1SDavid Howells { 596b514f872SAl Viro char *dummy; 59797a54868SBen Hutchings return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); 598f7b422b1SDavid Howells } 599f7b422b1SDavid Howells 600f7b422b1SDavid Howells /* 601f7b422b1SDavid Howells * Determine the actual block size (and log2 thereof) 602f7b422b1SDavid Howells */ 603f7b422b1SDavid Howells static inline 604f7b422b1SDavid Howells unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 605f7b422b1SDavid Howells { 606f7b422b1SDavid Howells /* make sure blocksize is a power of two */ 607f7b422b1SDavid Howells if ((bsize & (bsize - 1)) || nrbitsp) { 608f7b422b1SDavid Howells unsigned char nrbits; 609f7b422b1SDavid Howells 610f7b422b1SDavid Howells for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 611f7b422b1SDavid Howells ; 612f7b422b1SDavid Howells bsize = 1 << nrbits; 613f7b422b1SDavid Howells if (nrbitsp) 614f7b422b1SDavid Howells *nrbitsp = nrbits; 615f7b422b1SDavid Howells } 616f7b422b1SDavid Howells 617f7b422b1SDavid Howells return bsize; 618f7b422b1SDavid Howells } 619f7b422b1SDavid Howells 620f7b422b1SDavid Howells /* 621f7b422b1SDavid Howells * Calculate the number of 512byte blocks used. 622f7b422b1SDavid Howells */ 6239eaa67c6SChuck Lever static inline blkcnt_t nfs_calc_block_size(u64 tsize) 624f7b422b1SDavid Howells { 6259eaa67c6SChuck Lever blkcnt_t used = (tsize + 511) >> 9; 626f7b422b1SDavid Howells return (used > ULONG_MAX) ? ULONG_MAX : used; 627f7b422b1SDavid Howells } 628f7b422b1SDavid Howells 629f7b422b1SDavid Howells /* 630f7b422b1SDavid Howells * Compute and set NFS server blocksize 631f7b422b1SDavid Howells */ 632f7b422b1SDavid Howells static inline 633f7b422b1SDavid Howells unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 634f7b422b1SDavid Howells { 635f7b422b1SDavid Howells if (bsize < NFS_MIN_FILE_IO_SIZE) 636f7b422b1SDavid Howells bsize = NFS_DEF_FILE_IO_SIZE; 637f7b422b1SDavid Howells else if (bsize >= NFS_MAX_FILE_IO_SIZE) 638f7b422b1SDavid Howells bsize = NFS_MAX_FILE_IO_SIZE; 639f7b422b1SDavid Howells 640f7b422b1SDavid Howells return nfs_block_bits(bsize, nrbitsp); 641f7b422b1SDavid Howells } 642f7b422b1SDavid Howells 643f7b422b1SDavid Howells /* 644f7b422b1SDavid Howells * Determine the maximum file size for a superblock 645f7b422b1SDavid Howells */ 646f7b422b1SDavid Howells static inline 647f7b422b1SDavid Howells void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 648f7b422b1SDavid Howells { 649f7b422b1SDavid Howells sb->s_maxbytes = (loff_t)maxfilesize; 650f7b422b1SDavid Howells if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 651f7b422b1SDavid Howells sb->s_maxbytes = MAX_LFS_FILESIZE; 652f7b422b1SDavid Howells } 65349a70f27STrond Myklebust 65449a70f27STrond Myklebust /* 655d15bc38dSTom Haynes * Record the page as unstable and mark its inode as dirty. 656d15bc38dSTom Haynes */ 657d15bc38dSTom Haynes static inline 65886d80f97STrond Myklebust void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) 659d15bc38dSTom Haynes { 66086d80f97STrond Myklebust if (!cinfo->dreq) { 661d15bc38dSTom Haynes struct inode *inode = page_file_mapping(page)->host; 662d15bc38dSTom Haynes 66311fb9989SMel Gorman inc_node_page_state(page, NR_UNSTABLE_NFS); 66493f78d88STejun Heo inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE); 665d15bc38dSTom Haynes __mark_inode_dirty(inode, I_DIRTY_DATASYNC); 666d15bc38dSTom Haynes } 66786d80f97STrond Myklebust } 668d15bc38dSTom Haynes 669d15bc38dSTom Haynes /* 67049a70f27STrond Myklebust * Determine the number of bytes of data the page contains 67149a70f27STrond Myklebust */ 67249a70f27STrond Myklebust static inline 67349a70f27STrond Myklebust unsigned int nfs_page_length(struct page *page) 67449a70f27STrond Myklebust { 675d56b4ddfSMel Gorman loff_t i_size = i_size_read(page_file_mapping(page)->host); 67649a70f27STrond Myklebust 67749a70f27STrond Myklebust if (i_size > 0) { 6788cd79788SHuang Ying pgoff_t index = page_index(page); 67909cbfeafSKirill A. Shutemov pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; 6808cd79788SHuang Ying if (index < end_index) 68109cbfeafSKirill A. Shutemov return PAGE_SIZE; 6828cd79788SHuang Ying if (index == end_index) 68309cbfeafSKirill A. Shutemov return ((i_size - 1) & ~PAGE_MASK) + 1; 68449a70f27STrond Myklebust } 68549a70f27STrond Myklebust return 0; 68649a70f27STrond Myklebust } 6878d5658c9STrond Myklebust 6888d5658c9STrond Myklebust /* 6890b26a0bfSTrond Myklebust * Convert a umode to a dirent->d_type 6900b26a0bfSTrond Myklebust */ 6910b26a0bfSTrond Myklebust static inline 6920b26a0bfSTrond Myklebust unsigned char nfs_umode_to_dtype(umode_t mode) 6930b26a0bfSTrond Myklebust { 6940b26a0bfSTrond Myklebust return (mode >> 12) & 15; 6950b26a0bfSTrond Myklebust } 6960b26a0bfSTrond Myklebust 6970b26a0bfSTrond Myklebust /* 6988d5658c9STrond Myklebust * Determine the number of pages in an array of length 'len' and 6998d5658c9STrond Myklebust * with a base offset of 'base' 7008d5658c9STrond Myklebust */ 7018d5658c9STrond Myklebust static inline 7028d5658c9STrond Myklebust unsigned int nfs_page_array_len(unsigned int base, size_t len) 7038d5658c9STrond Myklebust { 7048d5658c9STrond Myklebust return ((unsigned long)len + (unsigned long)base + 7058d5658c9STrond Myklebust PAGE_SIZE - 1) >> PAGE_SHIFT; 7068d5658c9STrond Myklebust } 7070110ee15STrond Myklebust 7083a1556e8STrond Myklebust /* 709ae08483cSArnd Bergmann * Convert a struct timespec64 into a 64-bit change attribute 7103a1556e8STrond Myklebust * 711ae08483cSArnd Bergmann * This does approximately the same thing as timespec64_to_ns(), 7123a1556e8STrond Myklebust * but for calculation efficiency, we multiply the seconds by 7133a1556e8STrond Myklebust * 1024*1024*1024. 7143a1556e8STrond Myklebust */ 7153a1556e8STrond Myklebust static inline 716e86d5a02STrond Myklebust u64 nfs_timespec_to_change_attr(const struct timespec64 *ts) 7173a1556e8STrond Myklebust { 7183a1556e8STrond Myklebust return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 7193a1556e8STrond Myklebust } 7201264a2f0STrond Myklebust 7211264a2f0STrond Myklebust #ifdef CONFIG_CRC32 7221264a2f0STrond Myklebust /** 7231264a2f0STrond Myklebust * nfs_fhandle_hash - calculate the crc32 hash for the filehandle 7241264a2f0STrond Myklebust * @fh - pointer to filehandle 7251264a2f0STrond Myklebust * 7261264a2f0STrond Myklebust * returns a crc32 hash for the filehandle that is compatible with 7271264a2f0STrond Myklebust * the one displayed by "wireshark". 7281264a2f0STrond Myklebust */ 7291264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7301264a2f0STrond Myklebust { 7311264a2f0STrond Myklebust return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); 7321264a2f0STrond Myklebust } 73348c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) 73448c9579aSOlga Kornievskaia { 73548c9579aSOlga Kornievskaia return ~crc32_le(0xFFFFFFFF, &stateid->other[0], 73648c9579aSOlga Kornievskaia NFS4_STATEID_OTHER_SIZE); 73748c9579aSOlga Kornievskaia } 7381264a2f0STrond Myklebust #else 7391264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7401264a2f0STrond Myklebust { 7411264a2f0STrond Myklebust return 0; 7421264a2f0STrond Myklebust } 74348c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) 74448c9579aSOlga Kornievskaia { 74548c9579aSOlga Kornievskaia return 0; 74648c9579aSOlga Kornievskaia } 7471264a2f0STrond Myklebust #endif 7480bcbf039SPeng Tao 7490bcbf039SPeng Tao static inline bool nfs_error_is_fatal(int err) 7500bcbf039SPeng Tao { 7510bcbf039SPeng Tao switch (err) { 7520bcbf039SPeng Tao case -ERESTARTSYS: 7537dc58ca5STrond Myklebust case -EINTR: 75454551d85STrond Myklebust case -EACCES: 75554551d85STrond Myklebust case -EDQUOT: 75654551d85STrond Myklebust case -EFBIG: 7570bcbf039SPeng Tao case -EIO: 7580bcbf039SPeng Tao case -ENOSPC: 7590bcbf039SPeng Tao case -EROFS: 76054551d85STrond Myklebust case -ESTALE: 7610bcbf039SPeng Tao case -E2BIG: 7622dc23affSTrond Myklebust case -ENOMEM: 76311982a7cSTrond Myklebust case -ETIMEDOUT: 7640bcbf039SPeng Tao return true; 7650bcbf039SPeng Tao default: 7660bcbf039SPeng Tao return false; 7670bcbf039SPeng Tao } 7680bcbf039SPeng Tao } 769bf4b4905SNeilBrown 7708f54c7a4STrond Myklebust static inline bool nfs_error_is_fatal_on_server(int err) 7718f54c7a4STrond Myklebust { 7728f54c7a4STrond Myklebust switch (err) { 7738f54c7a4STrond Myklebust case 0: 7748f54c7a4STrond Myklebust case -ERESTARTSYS: 7758f54c7a4STrond Myklebust case -EINTR: 7768f54c7a4STrond Myklebust return false; 7778f54c7a4STrond Myklebust } 7788f54c7a4STrond Myklebust return nfs_error_is_fatal(err); 7798f54c7a4STrond Myklebust } 7809954bf92SDavid Howells 7819954bf92SDavid Howells /* 7829954bf92SDavid Howells * Select between a default port value and a user-specified port value. 7839954bf92SDavid Howells * If a zero value is set, then autobind will be used. 7849954bf92SDavid Howells */ 7859954bf92SDavid Howells static inline void nfs_set_port(struct sockaddr *sap, int *port, 7869954bf92SDavid Howells const unsigned short default_port) 7879954bf92SDavid Howells { 7889954bf92SDavid Howells if (*port == NFS_UNSPEC_PORT) 7899954bf92SDavid Howells *port = default_port; 7909954bf92SDavid Howells 7919954bf92SDavid Howells rpc_set_port(sap, *port); 7929954bf92SDavid Howells } 793