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 */ 72db531db9SMax Kellermann #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; 846619079dSTrond Myklebust unsigned int nconnect; 85fcf10398SBryan Schumaker struct net *net; 865c6e5b60STrond Myklebust const struct rpc_timeout *timeparms; 871a58e8a0STrond Myklebust const struct cred *cred; 88fcf10398SBryan Schumaker }; 89fcf10398SBryan Schumaker 9056e4ebf8SBryan Schumaker /* 916b18eaa0S\"Talpey, Thomas\ * In-kernel mount arguments 926b18eaa0S\"Talpey, Thomas\ */ 936b18eaa0S\"Talpey, Thomas\ struct nfs_parsed_mount_data { 946b18eaa0S\"Talpey, Thomas\ int flags; 958cb7f74eSChuck Lever unsigned int rsize, wsize; 968cb7f74eSChuck Lever unsigned int timeo, retrans; 978cb7f74eSChuck Lever unsigned int acregmin, acregmax, 986b18eaa0S\"Talpey, Thomas\ acdirmin, acdirmax; 998cb7f74eSChuck Lever unsigned int namlen; 100b797cac7SDavid Howells unsigned int options; 1016b18eaa0S\"Talpey, Thomas\ unsigned int bsize; 102a3f73c27SWeston Andros Adamson struct nfs_auth_info auth_info; 103a3f73c27SWeston Andros Adamson rpc_authflavor_t selected_flavor; 1046b18eaa0S\"Talpey, Thomas\ char *client_address; 105764302ccSChuck Lever unsigned int version; 1063fd5be9eSMike Sager unsigned int minorversion; 10708734048SDavid Howells char *fscache_uniq; 108b72e4f42SBryan Schumaker bool need_mount; 1096b18eaa0S\"Talpey, Thomas\ 1106b18eaa0S\"Talpey, Thomas\ struct { 1114c568017SChuck Lever struct sockaddr_storage address; 1124c568017SChuck Lever size_t addrlen; 1136b18eaa0S\"Talpey, Thomas\ char *hostname; 11478fa701fSChuck Lever u32 version; 1154cfd74fcSChuck Lever int port; 11678fa701fSChuck Lever unsigned short protocol; 1176b18eaa0S\"Talpey, Thomas\ } mount_server; 1186b18eaa0S\"Talpey, Thomas\ 1196b18eaa0S\"Talpey, Thomas\ struct { 1204c568017SChuck Lever struct sockaddr_storage address; 1214c568017SChuck Lever size_t addrlen; 1226b18eaa0S\"Talpey, Thomas\ char *hostname; 1236b18eaa0S\"Talpey, Thomas\ char *export_path; 1244cfd74fcSChuck Lever int port; 12578fa701fSChuck Lever unsigned short protocol; 12628cc5cd8STrond Myklebust unsigned short nconnect; 1276b18eaa0S\"Talpey, Thomas\ } nfs_server; 128f9c3a380SEric Paris 129204cc0ccSAl Viro void *lsm_opts; 130e50a7a1aSStanislav Kinsbursky struct net *net; 1316b18eaa0S\"Talpey, Thomas\ }; 1326b18eaa0S\"Talpey, Thomas\ 133146ec944SChuck Lever /* mount_clnt.c */ 134c5d120f8SChuck Lever struct nfs_mount_request { 135c5d120f8SChuck Lever struct sockaddr *sap; 136c5d120f8SChuck Lever size_t salen; 137c5d120f8SChuck Lever char *hostname; 138c5d120f8SChuck Lever char *dirpath; 139c5d120f8SChuck Lever u32 version; 140c5d120f8SChuck Lever unsigned short protocol; 141c5d120f8SChuck Lever struct nfs_fh *fh; 14250a737f8SChuck Lever int noresvport; 1438e02f6b9SChuck Lever unsigned int *auth_flav_len; 1448e02f6b9SChuck Lever rpc_authflavor_t *auth_flavs; 1456d59b8d5SStanislav Kinsbursky struct net *net; 146c5d120f8SChuck Lever }; 147c5d120f8SChuck Lever 148fbdefd64SBryan Schumaker struct nfs_mount_info { 149fbdefd64SBryan Schumaker void (*fill_super)(struct super_block *, struct nfs_mount_info *); 150fbdefd64SBryan Schumaker int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); 151fbdefd64SBryan Schumaker struct nfs_parsed_mount_data *parsed; 152fbdefd64SBryan Schumaker struct nfs_clone_mount *cloned; 153fbdefd64SBryan Schumaker struct nfs_fh *mntfh; 154fbdefd64SBryan Schumaker }; 155fbdefd64SBryan Schumaker 156c5d120f8SChuck Lever extern int nfs_mount(struct nfs_mount_request *info); 1570b524123SChuck Lever extern void nfs_umount(const struct nfs_mount_request *info); 158146ec944SChuck Lever 15924c8dbbbSDavid Howells /* client.c */ 160a613fa16STrond Myklebust extern const struct rpc_program nfs_program; 1616b13168bSStanislav Kinsbursky extern void nfs_clients_init(struct net *net); 16210b7a70cSTrond Myklebust extern void nfs_clients_exit(struct net *net); 1636663ee7fSBryan Schumaker extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); 1645c6e5b60STrond Myklebust int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t); 1657d38de3fSAnna Schumaker struct nfs_client *nfs_get_client(const struct nfs_client_initdata *); 166fcf10398SBryan Schumaker int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); 167fcf10398SBryan Schumaker void nfs_server_insert_lists(struct nfs_server *); 16832e62b7cSChuck Lever void nfs_server_remove_lists(struct nfs_server *); 169a956bedaSTrond Myklebust void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans); 170fcf10398SBryan Schumaker int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, 171fcf10398SBryan Schumaker rpc_authflavor_t); 172fcf10398SBryan Schumaker struct nfs_server *nfs_alloc_server(void); 173fcf10398SBryan Schumaker void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); 17454ceac45SDavid Howells 17524c8dbbbSDavid Howells extern void nfs_put_client(struct nfs_client *); 176cdb7ecedSBryan Schumaker extern void nfs_free_client(struct nfs_client *); 17728cd1b3fSStanislav Kinsbursky extern struct nfs_client *nfs4_find_client_ident(struct net *, int); 178c36fca52SAndy Adamson extern struct nfs_client * 179c7add9a9SStanislav Kinsbursky nfs4_find_client_sessionid(struct net *, const struct sockaddr *, 180459de2edSBryan Schumaker struct nfs4_sessionid *, u32); 1811179acc6SBryan Schumaker extern struct nfs_server *nfs_create_server(struct nfs_mount_info *, 182ab7017a3SBryan Schumaker struct nfs_subversion *); 18391ea40b9S\"Talpey, Thomas\ extern struct nfs_server *nfs4_create_server( 1841179acc6SBryan Schumaker struct nfs_mount_info *, 1851179acc6SBryan Schumaker struct nfs_subversion *); 18654ceac45SDavid Howells extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, 18754ceac45SDavid Howells struct nfs_fh *); 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 2384db6e0b7SFred Isaman struct nfs_pageio_descriptor; 239f7b422b1SDavid Howells /* pagelist.c */ 240f7b422b1SDavid Howells extern int __init nfs_init_nfspagecache(void); 241266bee88SDavid Brownell extern void nfs_destroy_nfspagecache(void); 242f7b422b1SDavid Howells extern int __init nfs_init_readpagecache(void); 243266bee88SDavid Brownell extern void nfs_destroy_readpagecache(void); 244f7b422b1SDavid Howells extern int __init nfs_init_writepagecache(void); 245266bee88SDavid Brownell extern void nfs_destroy_writepagecache(void); 246f7b422b1SDavid Howells 247f7b422b1SDavid Howells extern int __init nfs_init_directcache(void); 248266bee88SDavid Brownell extern void nfs_destroy_directcache(void); 2494db6e0b7SFred Isaman extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 2504db6e0b7SFred Isaman struct nfs_pgio_header *hdr, 2514db6e0b7SFred Isaman void (*release)(struct nfs_pgio_header *hdr)); 2524db6e0b7SFred Isaman void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 253210c7c17SBenjamin Coddington int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); 254577b4232STrond Myklebust 25541d8d5b7SAnna Schumaker extern const struct nfs_pageio_ops nfs_pgio_rw_ops; 2561e7f3a48SWeston Andros Adamson struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); 2571e7f3a48SWeston Andros Adamson void nfs_pgio_header_free(struct nfs_pgio_header *); 258ef2c488cSAnna Schumaker int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); 25946a5ab47SPeng Tao int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, 260a52458b4SNeilBrown const struct cred *cred, const struct nfs_rpc_ops *rpc_ops, 26146a5ab47SPeng Tao const struct rpc_call_ops *call_ops, int how, int flags); 262d4581383SWeston Andros Adamson void nfs_free_request(struct nfs_page *req); 26348d635f1SPeng Tao struct nfs_pgio_mirror * 26448d635f1SPeng Tao nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); 26500bfa30aSAnna Schumaker 26647af81f2SPeng Tao static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc) 26747af81f2SPeng Tao { 26847af81f2SPeng Tao WARN_ON_ONCE(desc->pg_mirror_count < 1); 26947af81f2SPeng Tao return desc->pg_mirror_count > 1; 27047af81f2SPeng Tao } 27147af81f2SPeng Tao 272138a2935STrond Myklebust static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, 273138a2935STrond Myklebust const struct nfs_open_context *ctx2) 274138a2935STrond Myklebust { 275a52458b4SNeilBrown return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state; 276138a2935STrond Myklebust } 277138a2935STrond Myklebust 278f7b422b1SDavid Howells /* nfs2xdr.c */ 279499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs_procedures[]; 280573c4e1eSChuck Lever extern int nfs2_decode_dirent(struct xdr_stream *, 281a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 282f7b422b1SDavid Howells 283f7b422b1SDavid Howells /* nfs3xdr.c */ 284499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs3_procedures[]; 285573c4e1eSChuck Lever extern int nfs3_decode_dirent(struct xdr_stream *, 286a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 287f7b422b1SDavid Howells 288f7b422b1SDavid Howells /* nfs4xdr.c */ 28989d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 290573c4e1eSChuck Lever extern int nfs4_decode_dirent(struct xdr_stream *, 291a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 2927d4e2747SDavid Howells #endif 2932449ea2eSAlexandros Batsakis #ifdef CONFIG_NFS_V4_1 2942449ea2eSAlexandros Batsakis extern const u32 nfs41_maxread_overhead; 2952449ea2eSAlexandros Batsakis extern const u32 nfs41_maxwrite_overhead; 296f1c097beSAndy Adamson extern const u32 nfs41_maxgetdevinfo_overhead; 2972449ea2eSAlexandros Batsakis #endif 298f7b422b1SDavid Howells 299f7b422b1SDavid Howells /* nfs4proc.c */ 30089d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 301499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs4_procedures[]; 302d75d5414SAndrew Morton #endif 303f7b422b1SDavid Howells 304694e096fSAnna Schumaker #ifdef CONFIG_NFS_V4_SECURITY_LABEL 305694e096fSAnna Schumaker extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); 306a49c2691SKinglong Mee static inline struct nfs4_label * 307a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 308a49c2691SKinglong Mee { 309a49c2691SKinglong Mee if (!dst || !src) 310a49c2691SKinglong Mee return NULL; 311a49c2691SKinglong Mee 312a49c2691SKinglong Mee if (src->len > NFS4_MAXLABELLEN) 313a49c2691SKinglong Mee return NULL; 314a49c2691SKinglong Mee 315a49c2691SKinglong Mee dst->lfs = src->lfs; 316a49c2691SKinglong Mee dst->pi = src->pi; 317a49c2691SKinglong Mee dst->len = src->len; 318a49c2691SKinglong Mee memcpy(dst->label, src->label, src->len); 319a49c2691SKinglong Mee 320a49c2691SKinglong Mee return dst; 321a49c2691SKinglong Mee } 322694e096fSAnna Schumaker static inline void nfs4_label_free(struct nfs4_label *label) 323694e096fSAnna Schumaker { 324694e096fSAnna Schumaker if (label) { 325694e096fSAnna Schumaker kfree(label->label); 326694e096fSAnna Schumaker kfree(label); 327694e096fSAnna Schumaker } 328694e096fSAnna Schumaker return; 329694e096fSAnna Schumaker } 330fd1defc2STrond Myklebust 331fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 332fd1defc2STrond Myklebust { 333fd1defc2STrond Myklebust if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) 334fd1defc2STrond Myklebust nfsi->cache_validity |= NFS_INO_INVALID_LABEL; 335fd1defc2STrond Myklebust } 336694e096fSAnna Schumaker #else 337694e096fSAnna Schumaker static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } 338694e096fSAnna Schumaker static inline void nfs4_label_free(void *label) {} 339fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 340fd1defc2STrond Myklebust { 341fd1defc2STrond Myklebust } 342a49c2691SKinglong Mee static inline struct nfs4_label * 343a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 344a49c2691SKinglong Mee { 345a49c2691SKinglong Mee return NULL; 346a49c2691SKinglong Mee } 347694e096fSAnna Schumaker #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 348694e096fSAnna Schumaker 3497fe5c398STrond Myklebust /* proc.c */ 3507fe5c398STrond Myklebust void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 3518cab4c39SChuck Lever extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 3525c6e5b60STrond Myklebust const struct nfs_client_initdata *); 3537fe5c398STrond Myklebust 354979df72eSTrond Myklebust /* dir.c */ 3551bcf4c5cSTrond Myklebust extern void nfs_advise_use_readdirplus(struct inode *dir); 356311324adSTrond Myklebust extern void nfs_force_use_readdirplus(struct inode *dir); 3571ab6c499SDave Chinner extern unsigned long nfs_access_cache_count(struct shrinker *shrink, 3581ab6c499SDave Chinner struct shrink_control *sc); 3591ab6c499SDave Chinner extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, 3601495f230SYing Han struct shrink_control *sc); 361597d9289SBryan Schumaker struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 362597d9289SBryan Schumaker int nfs_create(struct inode *, struct dentry *, umode_t, bool); 363597d9289SBryan Schumaker int nfs_mkdir(struct inode *, struct dentry *, umode_t); 364597d9289SBryan Schumaker int nfs_rmdir(struct inode *, struct dentry *); 365597d9289SBryan Schumaker int nfs_unlink(struct inode *, struct dentry *); 366597d9289SBryan Schumaker int nfs_symlink(struct inode *, struct dentry *, const char *); 367597d9289SBryan Schumaker int nfs_link(struct dentry *, struct inode *, struct dentry *); 368597d9289SBryan Schumaker int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); 3691cd66c93SMiklos Szeredi int nfs_rename(struct inode *, struct dentry *, 3701cd66c93SMiklos Szeredi struct inode *, struct dentry *, unsigned int); 371979df72eSTrond Myklebust 372ce4ef7c0SBryan Schumaker /* file.c */ 3734ff79bc7SChristoph Hellwig int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 374ce4ef7c0SBryan Schumaker loff_t nfs_file_llseek(struct file *, loff_t, int); 3753aa2d199SAl Viro ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); 376ce4ef7c0SBryan Schumaker int nfs_file_mmap(struct file *, struct vm_area_struct *); 377edaf4369SAl Viro ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); 378ce4ef7c0SBryan Schumaker int nfs_file_release(struct inode *, struct file *); 379ce4ef7c0SBryan Schumaker int nfs_lock(struct file *, int, struct file_lock *); 380ce4ef7c0SBryan Schumaker int nfs_flock(struct file *, int, struct file_lock *); 381ce4ef7c0SBryan Schumaker int nfs_check_flags(int); 382ce4ef7c0SBryan Schumaker 383f7b422b1SDavid Howells /* inode.c */ 3845746006fSTrond Myklebust extern struct workqueue_struct *nfsiod_workqueue; 385f7b422b1SDavid Howells extern struct inode *nfs_alloc_inode(struct super_block *sb); 386ca1a199eSAl Viro extern void nfs_free_inode(struct inode *); 387a9185b41SChristoph Hellwig extern int nfs_write_inode(struct inode *, struct writeback_control *); 388eed99357STrond Myklebust extern int nfs_drop_inode(struct inode *); 38919d87ca3SBryan Schumaker extern void nfs_clear_inode(struct inode *); 390b57922d9SAl Viro extern void nfs_evict_inode(struct inode *); 391f41f7418STrond Myklebust void nfs_zap_acl_cache(struct inode *inode); 39261540bf6STrond Myklebust extern bool nfs_check_cache_invalid(struct inode *, unsigned long); 393dfd01f02SPeter Zijlstra extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); 3945e4def20SDavid Howells extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode); 395f7b422b1SDavid Howells 396f7b422b1SDavid Howells /* super.c */ 3976a74490dSBryan Schumaker extern const struct super_operations nfs_sops; 398ab7017a3SBryan Schumaker extern struct file_system_type nfs_fs_type; 39954ceac45SDavid Howells extern struct file_system_type nfs_xdev_fs_type; 40089d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 40154ceac45SDavid Howells extern struct file_system_type nfs4_referral_fs_type; 402f7b422b1SDavid Howells #endif 4034d4b69ddSWeston Andros Adamson bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); 404ff9099f2SBryan Schumaker struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, 405ff9099f2SBryan Schumaker struct nfs_subversion *); 406fbdefd64SBryan Schumaker int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); 407fbdefd64SBryan Schumaker int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); 408ab7017a3SBryan Schumaker struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *, 409ab7017a3SBryan Schumaker struct nfs_mount_info *, struct nfs_subversion *); 410fbdefd64SBryan Schumaker struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); 411fbdefd64SBryan Schumaker struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, 412fbdefd64SBryan Schumaker const char *, struct nfs_mount_info *); 413fbdefd64SBryan Schumaker void nfs_kill_super(struct super_block *); 414fbdefd64SBryan Schumaker void nfs_fill_super(struct super_block *, struct nfs_mount_info *); 4154ebd9ab3SDominik Hackl 416f7b422b1SDavid Howells extern struct rpc_stat nfs_rpcstat; 4174ebd9ab3SDominik Hackl 418f7b422b1SDavid Howells extern int __init register_nfs_fs(void); 419f7b422b1SDavid Howells extern void __exit unregister_nfs_fs(void); 420ea7c38feSTrond Myklebust extern bool nfs_sb_active(struct super_block *sb); 4211daef0a8STrond Myklebust extern void nfs_sb_deactive(struct super_block *sb); 422f7b422b1SDavid Howells 423a5864c99STrond Myklebust /* io.c */ 424a5864c99STrond Myklebust extern void nfs_start_io_read(struct inode *inode); 425a5864c99STrond Myklebust extern void nfs_end_io_read(struct inode *inode); 426a5864c99STrond Myklebust extern void nfs_start_io_write(struct inode *inode); 427a5864c99STrond Myklebust extern void nfs_end_io_write(struct inode *inode); 428a5864c99STrond Myklebust extern void nfs_start_io_direct(struct inode *inode); 429a5864c99STrond Myklebust extern void nfs_end_io_direct(struct inode *inode); 430a5864c99STrond Myklebust 431651b0e70STrond Myklebust static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) 432651b0e70STrond Myklebust { 433651b0e70STrond Myklebust return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0; 434651b0e70STrond Myklebust } 435651b0e70STrond Myklebust 436f7b422b1SDavid Howells /* namespace.c */ 43797a54868SBen Hutchings #define NFS_PATH_CANONICAL 1 438b514f872SAl Viro extern char *nfs_path(char **p, struct dentry *dentry, 43997a54868SBen Hutchings char *buffer, ssize_t buflen, unsigned flags); 44036d43a43SDavid Howells extern struct vfsmount *nfs_d_automount(struct path *path); 441281cad46SBryan Schumaker struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, 442281cad46SBryan Schumaker struct nfs_fh *, struct nfs_fattr *); 443281cad46SBryan Schumaker struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, 444281cad46SBryan Schumaker struct nfs_fattr *, rpc_authflavor_t); 445f7b422b1SDavid Howells 44654ceac45SDavid Howells /* getroot.c */ 4470d5839adSAl Viro extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, 4480d5839adSAl Viro const char *); 44989d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 4500d5839adSAl Viro extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, 4510d5839adSAl Viro const char *); 45254ceac45SDavid Howells 4535e6b1990STrond Myklebust extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); 4547d4e2747SDavid Howells #endif 455f7b422b1SDavid Howells 456061ae2edSFred Isaman struct nfs_pgio_completion_ops; 457f11c88afSAndy Adamson /* read.c */ 458584aa810SFred Isaman extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 459fab5fc25SChristoph Hellwig struct inode *inode, bool force_mds, 460584aa810SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 461f11c88afSAndy Adamson extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 462493292ddSTrond Myklebust extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 463e885de1aSTrond Myklebust 464fbdefd64SBryan Schumaker /* super.c */ 465fbdefd64SBryan Schumaker void nfs_umount_begin(struct super_block *); 466fbdefd64SBryan Schumaker int nfs_statfs(struct dentry *, struct kstatfs *); 467fbdefd64SBryan Schumaker int nfs_show_options(struct seq_file *, struct dentry *); 468fbdefd64SBryan Schumaker int nfs_show_devname(struct seq_file *, struct dentry *); 469fbdefd64SBryan Schumaker int nfs_show_path(struct seq_file *, struct dentry *); 470fbdefd64SBryan Schumaker int nfs_show_stats(struct seq_file *, struct dentry *); 471fbdefd64SBryan Schumaker int nfs_remount(struct super_block *sb, int *flags, char *raw_data); 472fbdefd64SBryan Schumaker 473def6ed7eSAndy Adamson /* write.c */ 4741763da12SFred Isaman extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 475a20c93e3SChristoph Hellwig struct inode *inode, int ioflags, bool force_mds, 4761763da12SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 477dce81290STrond Myklebust extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 4780b7c0153SFred Isaman extern void nfs_commit_free(struct nfs_commit_data *p); 479def6ed7eSAndy Adamson extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 4800b7c0153SFred Isaman extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 4810b7c0153SFred Isaman extern int nfs_initiate_commit(struct rpc_clnt *clnt, 4820b7c0153SFred Isaman struct nfs_commit_data *data, 483c36aae9aSPeng Tao const struct nfs_rpc_ops *nfs_ops, 484e0c2b380SFred Isaman const struct rpc_call_ops *call_ops, 4859f0ec176SAndy Adamson int how, int flags); 4860b7c0153SFred Isaman extern void nfs_init_commit(struct nfs_commit_data *data, 487e0c2b380SFred Isaman struct list_head *head, 488f453a54aSFred Isaman struct pnfs_layout_segment *lseg, 489f453a54aSFred Isaman struct nfs_commit_info *cinfo); 4901763da12SFred Isaman int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 4911763da12SFred Isaman struct nfs_commit_info *cinfo, int max); 492ce59515cSAnna Schumaker unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); 4931763da12SFred Isaman int nfs_scan_commit(struct inode *inode, struct list_head *dst, 4941763da12SFred Isaman struct nfs_commit_info *cinfo); 4951763da12SFred Isaman void nfs_mark_request_commit(struct nfs_page *req, 4961763da12SFred Isaman struct pnfs_layout_segment *lseg, 497b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 498b57ff130SWeston Andros Adamson u32 ds_commit_idx); 499c65e6254SWeston Andros Adamson int nfs_write_need_commit(struct nfs_pgio_header *); 500a08a8cd3STrond Myklebust void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); 5011763da12SFred Isaman int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 5021763da12SFred Isaman int how, struct nfs_commit_info *cinfo); 503e0c2b380SFred Isaman void nfs_retry_commit(struct list_head *page_list, 504ea2cf228SFred Isaman struct pnfs_layout_segment *lseg, 505b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 506b57ff130SWeston Andros Adamson u32 ds_commit_idx); 5070b7c0153SFred Isaman void nfs_commitdata_release(struct nfs_commit_data *data); 5086272dcc6SAnna Schumaker void nfs_request_add_commit_list(struct nfs_page *req, 509ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 51086d80f97STrond Myklebust void nfs_request_add_commit_list_locked(struct nfs_page *req, 51186d80f97STrond Myklebust struct list_head *dst, 51286d80f97STrond Myklebust struct nfs_commit_info *cinfo); 513ea2cf228SFred Isaman void nfs_request_remove_commit_list(struct nfs_page *req, 514ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 515ea2cf228SFred Isaman void nfs_init_cinfo(struct nfs_commit_info *cinfo, 516ea2cf228SFred Isaman struct inode *inode, 517ea2cf228SFred Isaman struct nfs_direct_req *dreq); 518dc24826bSAndy Adamson int nfs_key_timeout_notify(struct file *filp, struct inode *inode); 519ce52914eSScott Mayhew bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode); 520a7d42ddbSWeston Andros Adamson void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); 521e0c2b380SFred Isaman 522837bb1d7STrond Myklebust int nfs_filemap_write_and_wait_range(struct address_space *mapping, 523837bb1d7STrond Myklebust loff_t lstart, loff_t lend); 524837bb1d7STrond Myklebust 525a5314a74STrond Myklebust #ifdef CONFIG_NFS_V4_1 526a5314a74STrond Myklebust static inline 527a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 528a5314a74STrond Myklebust { 529a5314a74STrond Myklebust int i; 530a5314a74STrond Myklebust 531a5314a74STrond Myklebust for (i = 0; i < cinfo->nbuckets; i++) 532a5314a74STrond Myklebust cinfo->buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; 533a5314a74STrond Myklebust } 534a5314a74STrond Myklebust #else 535a5314a74STrond Myklebust static inline 536a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 537a5314a74STrond Myklebust { 538a5314a74STrond Myklebust } 539a5314a74STrond Myklebust #endif 540a5314a74STrond Myklebust 541074cc1deSTrond Myklebust #ifdef CONFIG_MIGRATION 542074cc1deSTrond Myklebust extern int nfs_migrate_page(struct address_space *, 543a6bc32b8SMel Gorman struct page *, struct page *, enum migrate_mode); 544074cc1deSTrond Myklebust #endif 545def6ed7eSAndy Adamson 5468fc3c386STrond Myklebust static inline int 5478fc3c386STrond Myklebust nfs_write_verifier_cmp(const struct nfs_write_verifier *v1, 5488fc3c386STrond Myklebust const struct nfs_write_verifier *v2) 5498fc3c386STrond Myklebust { 5508fc3c386STrond Myklebust return memcmp(v1->data, v2->data, sizeof(v1->data)); 5518fc3c386STrond Myklebust } 5528fc3c386STrond Myklebust 5530e862a40SJeff Layton /* unlink.c */ 5540e862a40SJeff Layton extern struct rpc_task * 5550e862a40SJeff Layton nfs_async_rename(struct inode *old_dir, struct inode *new_dir, 5560e862a40SJeff Layton struct dentry *old_dentry, struct dentry *new_dentry, 5570e862a40SJeff Layton void (*complete)(struct rpc_task *, struct nfs_renamedata *)); 5580e862a40SJeff Layton extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); 5590e862a40SJeff Layton 5601763da12SFred Isaman /* direct.c */ 5611763da12SFred Isaman void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, 5621763da12SFred Isaman struct nfs_direct_req *dreq); 5636296556fSPeng Tao extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); 5641763da12SFred Isaman 565cccef3b9SAndy Adamson /* nfs4proc.c */ 5668cab4c39SChuck Lever extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 5675c6e5b60STrond Myklebust const struct nfs_client_initdata *); 56805f4c350SChuck Lever extern int nfs40_walk_client_list(struct nfs_client *clp, 56905f4c350SChuck Lever struct nfs_client **result, 570a52458b4SNeilBrown const struct cred *cred); 57105f4c350SChuck Lever extern int nfs41_walk_client_list(struct nfs_client *clp, 57205f4c350SChuck Lever struct nfs_client **result, 573a52458b4SNeilBrown const struct cred *cred); 57410e037d1SSantosh kumar pradhan extern void nfs4_test_session_trunk(struct rpc_clnt *clnt, 57510e037d1SSantosh kumar pradhan struct rpc_xprt *xprt, 57610e037d1SSantosh kumar pradhan void *data); 577cccef3b9SAndy Adamson 578ea7c38feSTrond Myklebust static inline struct inode *nfs_igrab_and_active(struct inode *inode) 579ea7c38feSTrond Myklebust { 580ea7c38feSTrond Myklebust inode = igrab(inode); 581ea7c38feSTrond Myklebust if (inode != NULL && !nfs_sb_active(inode->i_sb)) { 582ea7c38feSTrond Myklebust iput(inode); 583ea7c38feSTrond Myklebust inode = NULL; 584ea7c38feSTrond Myklebust } 585ea7c38feSTrond Myklebust return inode; 586ea7c38feSTrond Myklebust } 587ea7c38feSTrond Myklebust 588ea7c38feSTrond Myklebust static inline void nfs_iput_and_deactive(struct inode *inode) 589ea7c38feSTrond Myklebust { 590ea7c38feSTrond Myklebust if (inode != NULL) { 591ea7c38feSTrond Myklebust struct super_block *sb = inode->i_sb; 592ea7c38feSTrond Myklebust 593ea7c38feSTrond Myklebust iput(inode); 594ea7c38feSTrond Myklebust nfs_sb_deactive(sb); 595ea7c38feSTrond Myklebust } 596ea7c38feSTrond Myklebust } 597ea7c38feSTrond Myklebust 598557134a3SAndy Adamson /* 599f7b422b1SDavid Howells * Determine the device name as a string 600f7b422b1SDavid Howells */ 601b514f872SAl Viro static inline char *nfs_devname(struct dentry *dentry, 602f7b422b1SDavid Howells char *buffer, ssize_t buflen) 603f7b422b1SDavid Howells { 604b514f872SAl Viro char *dummy; 60597a54868SBen Hutchings return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); 606f7b422b1SDavid Howells } 607f7b422b1SDavid Howells 608f7b422b1SDavid Howells /* 609f7b422b1SDavid Howells * Determine the actual block size (and log2 thereof) 610f7b422b1SDavid Howells */ 611f7b422b1SDavid Howells static inline 612f7b422b1SDavid Howells unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 613f7b422b1SDavid Howells { 614f7b422b1SDavid Howells /* make sure blocksize is a power of two */ 615f7b422b1SDavid Howells if ((bsize & (bsize - 1)) || nrbitsp) { 616f7b422b1SDavid Howells unsigned char nrbits; 617f7b422b1SDavid Howells 618f7b422b1SDavid Howells for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 619f7b422b1SDavid Howells ; 620f7b422b1SDavid Howells bsize = 1 << nrbits; 621f7b422b1SDavid Howells if (nrbitsp) 622f7b422b1SDavid Howells *nrbitsp = nrbits; 623f7b422b1SDavid Howells } 624f7b422b1SDavid Howells 625f7b422b1SDavid Howells return bsize; 626f7b422b1SDavid Howells } 627f7b422b1SDavid Howells 628f7b422b1SDavid Howells /* 629f7b422b1SDavid Howells * Calculate the number of 512byte blocks used. 630f7b422b1SDavid Howells */ 6319eaa67c6SChuck Lever static inline blkcnt_t nfs_calc_block_size(u64 tsize) 632f7b422b1SDavid Howells { 6339eaa67c6SChuck Lever blkcnt_t used = (tsize + 511) >> 9; 634f7b422b1SDavid Howells return (used > ULONG_MAX) ? ULONG_MAX : used; 635f7b422b1SDavid Howells } 636f7b422b1SDavid Howells 637f7b422b1SDavid Howells /* 638f7b422b1SDavid Howells * Compute and set NFS server blocksize 639f7b422b1SDavid Howells */ 640f7b422b1SDavid Howells static inline 641f7b422b1SDavid Howells unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 642f7b422b1SDavid Howells { 643f7b422b1SDavid Howells if (bsize < NFS_MIN_FILE_IO_SIZE) 644f7b422b1SDavid Howells bsize = NFS_DEF_FILE_IO_SIZE; 645f7b422b1SDavid Howells else if (bsize >= NFS_MAX_FILE_IO_SIZE) 646f7b422b1SDavid Howells bsize = NFS_MAX_FILE_IO_SIZE; 647f7b422b1SDavid Howells 648f7b422b1SDavid Howells return nfs_block_bits(bsize, nrbitsp); 649f7b422b1SDavid Howells } 650f7b422b1SDavid Howells 651f7b422b1SDavid Howells /* 652f7b422b1SDavid Howells * Determine the maximum file size for a superblock 653f7b422b1SDavid Howells */ 654f7b422b1SDavid Howells static inline 655f7b422b1SDavid Howells void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 656f7b422b1SDavid Howells { 657f7b422b1SDavid Howells sb->s_maxbytes = (loff_t)maxfilesize; 658f7b422b1SDavid Howells if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 659f7b422b1SDavid Howells sb->s_maxbytes = MAX_LFS_FILESIZE; 660f7b422b1SDavid Howells } 66149a70f27STrond Myklebust 66249a70f27STrond Myklebust /* 663d15bc38dSTom Haynes * Record the page as unstable and mark its inode as dirty. 664d15bc38dSTom Haynes */ 665d15bc38dSTom Haynes static inline 66686d80f97STrond Myklebust void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) 667d15bc38dSTom Haynes { 66886d80f97STrond Myklebust if (!cinfo->dreq) { 669d15bc38dSTom Haynes struct inode *inode = page_file_mapping(page)->host; 670d15bc38dSTom Haynes 67111fb9989SMel Gorman inc_node_page_state(page, NR_UNSTABLE_NFS); 67293f78d88STejun Heo inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE); 673d15bc38dSTom Haynes __mark_inode_dirty(inode, I_DIRTY_DATASYNC); 674d15bc38dSTom Haynes } 67586d80f97STrond Myklebust } 676d15bc38dSTom Haynes 677d15bc38dSTom Haynes /* 67849a70f27STrond Myklebust * Determine the number of bytes of data the page contains 67949a70f27STrond Myklebust */ 68049a70f27STrond Myklebust static inline 68149a70f27STrond Myklebust unsigned int nfs_page_length(struct page *page) 68249a70f27STrond Myklebust { 683d56b4ddfSMel Gorman loff_t i_size = i_size_read(page_file_mapping(page)->host); 68449a70f27STrond Myklebust 68549a70f27STrond Myklebust if (i_size > 0) { 6868cd79788SHuang Ying pgoff_t index = page_index(page); 68709cbfeafSKirill A. Shutemov pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; 6888cd79788SHuang Ying if (index < end_index) 68909cbfeafSKirill A. Shutemov return PAGE_SIZE; 6908cd79788SHuang Ying if (index == end_index) 69109cbfeafSKirill A. Shutemov return ((i_size - 1) & ~PAGE_MASK) + 1; 69249a70f27STrond Myklebust } 69349a70f27STrond Myklebust return 0; 69449a70f27STrond Myklebust } 6958d5658c9STrond Myklebust 6968d5658c9STrond Myklebust /* 6970b26a0bfSTrond Myklebust * Convert a umode to a dirent->d_type 6980b26a0bfSTrond Myklebust */ 6990b26a0bfSTrond Myklebust static inline 7000b26a0bfSTrond Myklebust unsigned char nfs_umode_to_dtype(umode_t mode) 7010b26a0bfSTrond Myklebust { 7020b26a0bfSTrond Myklebust return (mode >> 12) & 15; 7030b26a0bfSTrond Myklebust } 7040b26a0bfSTrond Myklebust 7050b26a0bfSTrond Myklebust /* 7068d5658c9STrond Myklebust * Determine the number of pages in an array of length 'len' and 7078d5658c9STrond Myklebust * with a base offset of 'base' 7088d5658c9STrond Myklebust */ 7098d5658c9STrond Myklebust static inline 7108d5658c9STrond Myklebust unsigned int nfs_page_array_len(unsigned int base, size_t len) 7118d5658c9STrond Myklebust { 7128d5658c9STrond Myklebust return ((unsigned long)len + (unsigned long)base + 7138d5658c9STrond Myklebust PAGE_SIZE - 1) >> PAGE_SHIFT; 7148d5658c9STrond Myklebust } 7150110ee15STrond Myklebust 7163a1556e8STrond Myklebust /* 7173a1556e8STrond Myklebust * Convert a struct timespec into a 64-bit change attribute 7183a1556e8STrond Myklebust * 7193a1556e8STrond Myklebust * This does approximately the same thing as timespec_to_ns(), 7203a1556e8STrond Myklebust * but for calculation efficiency, we multiply the seconds by 7213a1556e8STrond Myklebust * 1024*1024*1024. 7223a1556e8STrond Myklebust */ 7233a1556e8STrond Myklebust static inline 7243a1556e8STrond Myklebust u64 nfs_timespec_to_change_attr(const struct timespec *ts) 7253a1556e8STrond Myklebust { 7263a1556e8STrond Myklebust return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 7273a1556e8STrond Myklebust } 7281264a2f0STrond Myklebust 7291264a2f0STrond Myklebust #ifdef CONFIG_CRC32 7301264a2f0STrond Myklebust /** 7311264a2f0STrond Myklebust * nfs_fhandle_hash - calculate the crc32 hash for the filehandle 7321264a2f0STrond Myklebust * @fh - pointer to filehandle 7331264a2f0STrond Myklebust * 7341264a2f0STrond Myklebust * returns a crc32 hash for the filehandle that is compatible with 7351264a2f0STrond Myklebust * the one displayed by "wireshark". 7361264a2f0STrond Myklebust */ 7371264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7381264a2f0STrond Myklebust { 7391264a2f0STrond Myklebust return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); 7401264a2f0STrond Myklebust } 74148c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) 74248c9579aSOlga Kornievskaia { 74348c9579aSOlga Kornievskaia return ~crc32_le(0xFFFFFFFF, &stateid->other[0], 74448c9579aSOlga Kornievskaia NFS4_STATEID_OTHER_SIZE); 74548c9579aSOlga Kornievskaia } 7461264a2f0STrond Myklebust #else 7471264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7481264a2f0STrond Myklebust { 7491264a2f0STrond Myklebust return 0; 7501264a2f0STrond Myklebust } 75148c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) 75248c9579aSOlga Kornievskaia { 75348c9579aSOlga Kornievskaia return 0; 75448c9579aSOlga Kornievskaia } 7551264a2f0STrond Myklebust #endif 7560bcbf039SPeng Tao 7570bcbf039SPeng Tao static inline bool nfs_error_is_fatal(int err) 7580bcbf039SPeng Tao { 7590bcbf039SPeng Tao switch (err) { 7600bcbf039SPeng Tao case -ERESTARTSYS: 7617dc58ca5STrond Myklebust case -EINTR: 76254551d85STrond Myklebust case -EACCES: 76354551d85STrond Myklebust case -EDQUOT: 76454551d85STrond Myklebust case -EFBIG: 7650bcbf039SPeng Tao case -EIO: 7660bcbf039SPeng Tao case -ENOSPC: 7670bcbf039SPeng Tao case -EROFS: 76854551d85STrond Myklebust case -ESTALE: 7690bcbf039SPeng Tao case -E2BIG: 7702dc23affSTrond Myklebust case -ENOMEM: 77111982a7cSTrond Myklebust case -ETIMEDOUT: 7720bcbf039SPeng Tao return true; 7730bcbf039SPeng Tao default: 7740bcbf039SPeng Tao return false; 7750bcbf039SPeng Tao } 7760bcbf039SPeng Tao } 777bf4b4905SNeilBrown 7788f54c7a4STrond Myklebust static inline bool nfs_error_is_fatal_on_server(int err) 7798f54c7a4STrond Myklebust { 7808f54c7a4STrond Myklebust switch (err) { 7818f54c7a4STrond Myklebust case 0: 7828f54c7a4STrond Myklebust case -ERESTARTSYS: 7838f54c7a4STrond Myklebust case -EINTR: 7848f54c7a4STrond Myklebust return false; 7858f54c7a4STrond Myklebust } 7868f54c7a4STrond Myklebust return nfs_error_is_fatal(err); 7878f54c7a4STrond Myklebust } 788