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 59fcf10398SBryan Schumaker struct nfs_client_initdata { 60fcf10398SBryan Schumaker unsigned long init_flags; 615c6e5b60STrond Myklebust const char *hostname; /* Hostname of the server */ 625c6e5b60STrond Myklebust const struct sockaddr *addr; /* Address of the server */ 635c6e5b60STrond Myklebust const char *nodename; /* Hostname of the client */ 645c6e5b60STrond Myklebust const char *ip_addr; /* IP address of the client */ 65fcf10398SBryan Schumaker size_t addrlen; 66ab7017a3SBryan Schumaker struct nfs_subversion *nfs_mod; 67fcf10398SBryan Schumaker int proto; 68fcf10398SBryan Schumaker u32 minorversion; 696619079dSTrond Myklebust unsigned int nconnect; 70fcf10398SBryan Schumaker struct net *net; 715c6e5b60STrond Myklebust const struct rpc_timeout *timeparms; 721a58e8a0STrond Myklebust const struct cred *cred; 73fcf10398SBryan Schumaker }; 74fcf10398SBryan Schumaker 7556e4ebf8SBryan Schumaker /* 766b18eaa0S\"Talpey, Thomas\ * In-kernel mount arguments 776b18eaa0S\"Talpey, Thomas\ */ 785eb005caSDavid Howells struct nfs_fs_context { 79f2aedb71SDavid Howells bool internal; 80f2aedb71SDavid Howells bool skip_reconfig_option_check; 81f2aedb71SDavid Howells bool need_mount; 82f2aedb71SDavid Howells bool sloppy; 83e558100fSDavid Howells unsigned int flags; /* NFS{,4}_MOUNT_* flags */ 848cb7f74eSChuck Lever unsigned int rsize, wsize; 858cb7f74eSChuck Lever unsigned int timeo, retrans; 86e558100fSDavid Howells unsigned int acregmin, acregmax; 87e558100fSDavid Howells unsigned int acdirmin, acdirmax; 888cb7f74eSChuck Lever unsigned int namlen; 89b797cac7SDavid Howells unsigned int options; 906b18eaa0S\"Talpey, Thomas\ unsigned int bsize; 91a3f73c27SWeston Andros Adamson struct nfs_auth_info auth_info; 92a3f73c27SWeston Andros Adamson rpc_authflavor_t selected_flavor; 936b18eaa0S\"Talpey, Thomas\ char *client_address; 94764302ccSChuck Lever unsigned int version; 953fd5be9eSMike Sager unsigned int minorversion; 9608734048SDavid Howells char *fscache_uniq; 97f8ee01e3SDavid Howells unsigned short protofamily; 98f8ee01e3SDavid Howells unsigned short mountfamily; 996b18eaa0S\"Talpey, Thomas\ 1006b18eaa0S\"Talpey, Thomas\ struct { 101e558100fSDavid Howells union { 102e558100fSDavid Howells struct sockaddr address; 103e558100fSDavid Howells struct sockaddr_storage _address; 104e558100fSDavid Howells }; 1054c568017SChuck Lever size_t addrlen; 1066b18eaa0S\"Talpey, Thomas\ char *hostname; 10778fa701fSChuck Lever u32 version; 1084cfd74fcSChuck Lever int port; 10978fa701fSChuck Lever unsigned short protocol; 1106b18eaa0S\"Talpey, Thomas\ } mount_server; 1116b18eaa0S\"Talpey, Thomas\ 1126b18eaa0S\"Talpey, Thomas\ struct { 113e558100fSDavid Howells union { 114e558100fSDavid Howells struct sockaddr address; 115e558100fSDavid Howells struct sockaddr_storage _address; 116e558100fSDavid Howells }; 1174c568017SChuck Lever size_t addrlen; 1186b18eaa0S\"Talpey, Thomas\ char *hostname; 1196b18eaa0S\"Talpey, Thomas\ char *export_path; 1204cfd74fcSChuck Lever int port; 12178fa701fSChuck Lever unsigned short protocol; 12228cc5cd8STrond Myklebust unsigned short nconnect; 123f2aedb71SDavid Howells unsigned short export_path_len; 1246b18eaa0S\"Talpey, Thomas\ } nfs_server; 125f9c3a380SEric Paris 12662a55d08SScott Mayhew struct nfs_fh *mntfh; 12762a55d08SScott Mayhew struct nfs_server *server; 12862a55d08SScott Mayhew struct nfs_subversion *nfs_mod; 12948be8a66SDavid Howells 13062a55d08SScott Mayhew /* Information for a cloned mount. */ 13162a55d08SScott Mayhew struct nfs_clone_mount { 13262a55d08SScott Mayhew struct super_block *sb; 13362a55d08SScott Mayhew struct dentry *dentry; 13462a55d08SScott Mayhew struct nfs_fattr *fattr; 13562a55d08SScott Mayhew unsigned int inherited_bsize; 13662a55d08SScott Mayhew } clone_data; 1376b18eaa0S\"Talpey, Thomas\ }; 1386b18eaa0S\"Talpey, Thomas\ 139c98e9daaSScott Mayhew #define nfs_errorf(fc, fmt, ...) ((fc)->log.log ? \ 140c98e9daaSScott Mayhew errorf(fc, fmt, ## __VA_ARGS__) : \ 141c98e9daaSScott Mayhew ({ dprintk(fmt "\n", ## __VA_ARGS__); })) 142c98e9daaSScott Mayhew 143c98e9daaSScott Mayhew #define nfs_ferrorf(fc, fac, fmt, ...) ((fc)->log.log ? \ 144c98e9daaSScott Mayhew errorf(fc, fmt, ## __VA_ARGS__) : \ 145c98e9daaSScott Mayhew ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); })) 146c98e9daaSScott Mayhew 147c98e9daaSScott Mayhew #define nfs_invalf(fc, fmt, ...) ((fc)->log.log ? \ 148c98e9daaSScott Mayhew invalf(fc, fmt, ## __VA_ARGS__) : \ 149c98e9daaSScott Mayhew ({ dprintk(fmt "\n", ## __VA_ARGS__); -EINVAL; })) 150c98e9daaSScott Mayhew 151c98e9daaSScott Mayhew #define nfs_finvalf(fc, fac, fmt, ...) ((fc)->log.log ? \ 152c98e9daaSScott Mayhew invalf(fc, fmt, ## __VA_ARGS__) : \ 153c98e9daaSScott Mayhew ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); -EINVAL; })) 154c98e9daaSScott Mayhew 155c98e9daaSScott Mayhew #define nfs_warnf(fc, fmt, ...) ((fc)->log.log ? \ 156c98e9daaSScott Mayhew warnf(fc, fmt, ## __VA_ARGS__) : \ 157c98e9daaSScott Mayhew ({ dprintk(fmt "\n", ## __VA_ARGS__); })) 158c98e9daaSScott Mayhew 159c98e9daaSScott Mayhew #define nfs_fwarnf(fc, fac, fmt, ...) ((fc)->log.log ? \ 160c98e9daaSScott Mayhew warnf(fc, fmt, ## __VA_ARGS__) : \ 161c98e9daaSScott Mayhew ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); })) 162ce8866f0SScott Mayhew 163f2aedb71SDavid Howells static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc) 164f2aedb71SDavid Howells { 165f2aedb71SDavid Howells return fc->fs_private; 166f2aedb71SDavid Howells } 167f2aedb71SDavid Howells 168146ec944SChuck Lever /* mount_clnt.c */ 169c5d120f8SChuck Lever struct nfs_mount_request { 170c5d120f8SChuck Lever struct sockaddr *sap; 171c5d120f8SChuck Lever size_t salen; 172c5d120f8SChuck Lever char *hostname; 173c5d120f8SChuck Lever char *dirpath; 174c5d120f8SChuck Lever u32 version; 175c5d120f8SChuck Lever unsigned short protocol; 176c5d120f8SChuck Lever struct nfs_fh *fh; 17750a737f8SChuck Lever int noresvport; 1788e02f6b9SChuck Lever unsigned int *auth_flav_len; 1798e02f6b9SChuck Lever rpc_authflavor_t *auth_flavs; 1806d59b8d5SStanislav Kinsbursky struct net *net; 181c5d120f8SChuck Lever }; 182c5d120f8SChuck Lever 183c5d120f8SChuck Lever extern int nfs_mount(struct nfs_mount_request *info); 1840b524123SChuck Lever extern void nfs_umount(const struct nfs_mount_request *info); 185146ec944SChuck Lever 18624c8dbbbSDavid Howells /* client.c */ 187a613fa16STrond Myklebust extern const struct rpc_program nfs_program; 1886b13168bSStanislav Kinsbursky extern void nfs_clients_init(struct net *net); 18910b7a70cSTrond Myklebust extern void nfs_clients_exit(struct net *net); 1906663ee7fSBryan Schumaker extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); 1915c6e5b60STrond Myklebust int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t); 1927d38de3fSAnna Schumaker struct nfs_client *nfs_get_client(const struct nfs_client_initdata *); 193fcf10398SBryan Schumaker int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); 194fcf10398SBryan Schumaker void nfs_server_insert_lists(struct nfs_server *); 19532e62b7cSChuck Lever void nfs_server_remove_lists(struct nfs_server *); 196a956bedaSTrond Myklebust void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans); 197fcf10398SBryan Schumaker int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, 198fcf10398SBryan Schumaker rpc_authflavor_t); 199fcf10398SBryan Schumaker struct nfs_server *nfs_alloc_server(void); 200fcf10398SBryan Schumaker void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); 20154ceac45SDavid Howells 20224c8dbbbSDavid Howells extern void nfs_put_client(struct nfs_client *); 203cdb7ecedSBryan Schumaker extern void nfs_free_client(struct nfs_client *); 20428cd1b3fSStanislav Kinsbursky extern struct nfs_client *nfs4_find_client_ident(struct net *, int); 205c36fca52SAndy Adamson extern struct nfs_client * 206c7add9a9SStanislav Kinsbursky nfs4_find_client_sessionid(struct net *, const struct sockaddr *, 207459de2edSBryan Schumaker struct nfs4_sessionid *, u32); 20862a55d08SScott Mayhew extern struct nfs_server *nfs_create_server(struct fs_context *); 20962a55d08SScott Mayhew extern struct nfs_server *nfs4_create_server(struct fs_context *); 21062a55d08SScott Mayhew extern struct nfs_server *nfs4_create_referral_server(struct fs_context *); 21132e62b7cSChuck Lever extern int nfs4_update_server(struct nfs_server *server, const char *hostname, 212292f503cSTrond Myklebust struct sockaddr *sap, size_t salen, 213292f503cSTrond Myklebust struct net *net); 21454ceac45SDavid Howells extern void nfs_free_server(struct nfs_server *server); 21554ceac45SDavid Howells extern struct nfs_server *nfs_clone_server(struct nfs_server *, 21654ceac45SDavid Howells struct nfs_fh *, 2177e6eb683SBryan Schumaker struct nfs_fattr *, 2187e6eb683SBryan Schumaker rpc_authflavor_t); 219a33e4b03SWeston Andros Adamson extern bool nfs_client_init_is_complete(const struct nfs_client *clp); 220a33e4b03SWeston Andros Adamson extern int nfs_client_init_status(const struct nfs_client *clp); 2214697bd5eSTrond Myklebust extern int nfs_wait_client_init_complete(const struct nfs_client *clp); 22276db6d95SAndy Adamson extern void nfs_mark_client_ready(struct nfs_client *clp, int state); 2233fc75f12STigran Mkrtchyan extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, 224d83217c1SAndy Adamson const struct sockaddr *ds_addr, 22598fc685aSAndy Adamson int ds_addrlen, int ds_proto, 22698fc685aSAndy Adamson unsigned int ds_timeo, 227064172f3SPeng Tao unsigned int ds_retrans, 2287d38de3fSAnna Schumaker u32 minor_version); 2290e20162eSAndy Adamson extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, 2300e20162eSAndy Adamson struct inode *); 231b224f7cbSTigran Mkrtchyan extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, 2321a04c6e1SPeng Tao const struct sockaddr *ds_addr, int ds_addrlen, 2331a04c6e1SPeng Tao int ds_proto, unsigned int ds_timeo, 2347d38de3fSAnna Schumaker unsigned int ds_retrans); 2356aaca566SDavid Howells #ifdef CONFIG_PROC_FS 2366aaca566SDavid Howells extern int __init nfs_fs_proc_init(void); 2376aaca566SDavid Howells extern void nfs_fs_proc_exit(void); 23865b38851SEric W. Biederman extern int nfs_fs_proc_net_init(struct net *net); 23965b38851SEric W. Biederman extern void nfs_fs_proc_net_exit(struct net *net); 2406aaca566SDavid Howells #else 24165b38851SEric W. Biederman static inline int nfs_fs_proc_net_init(struct net *net) 24265b38851SEric W. Biederman { 24365b38851SEric W. Biederman return 0; 24465b38851SEric W. Biederman } 24565b38851SEric W. Biederman static inline void nfs_fs_proc_net_exit(struct net *net) 24665b38851SEric W. Biederman { 24765b38851SEric W. Biederman } 2486aaca566SDavid Howells static inline int nfs_fs_proc_init(void) 2496aaca566SDavid Howells { 2506aaca566SDavid Howells return 0; 2516aaca566SDavid Howells } 2526aaca566SDavid Howells static inline void nfs_fs_proc_exit(void) 2536aaca566SDavid Howells { 2546aaca566SDavid Howells } 2556aaca566SDavid Howells #endif 25624c8dbbbSDavid Howells 257f7b422b1SDavid Howells /* callback_xdr.c */ 258e9679189SChristoph Hellwig extern const struct svc_version nfs4_callback_version1; 259e9679189SChristoph Hellwig extern const struct svc_version nfs4_callback_version4; 260f7b422b1SDavid Howells 261f2aedb71SDavid Howells /* fs_context.c */ 262f2aedb71SDavid Howells extern struct file_system_type nfs_fs_type; 2639954bf92SDavid Howells 264f7b422b1SDavid Howells /* pagelist.c */ 265f7b422b1SDavid Howells extern int __init nfs_init_nfspagecache(void); 266266bee88SDavid Brownell extern void nfs_destroy_nfspagecache(void); 267f7b422b1SDavid Howells extern int __init nfs_init_readpagecache(void); 268266bee88SDavid Brownell extern void nfs_destroy_readpagecache(void); 269f7b422b1SDavid Howells extern int __init nfs_init_writepagecache(void); 270266bee88SDavid Brownell extern void nfs_destroy_writepagecache(void); 271f7b422b1SDavid Howells 272f7b422b1SDavid Howells extern int __init nfs_init_directcache(void); 273266bee88SDavid Brownell extern void nfs_destroy_directcache(void); 2744db6e0b7SFred Isaman extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, 2754db6e0b7SFred Isaman struct nfs_pgio_header *hdr, 2764db6e0b7SFred Isaman void (*release)(struct nfs_pgio_header *hdr)); 2774db6e0b7SFred Isaman void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); 278210c7c17SBenjamin Coddington int nfs_iocounter_wait(struct nfs_lock_context *l_ctx); 279577b4232STrond Myklebust 28041d8d5b7SAnna Schumaker extern const struct nfs_pageio_ops nfs_pgio_rw_ops; 2811e7f3a48SWeston Andros Adamson struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); 2821e7f3a48SWeston Andros Adamson void nfs_pgio_header_free(struct nfs_pgio_header *); 283ef2c488cSAnna Schumaker int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); 28446a5ab47SPeng Tao int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, 285a52458b4SNeilBrown const struct cred *cred, const struct nfs_rpc_ops *rpc_ops, 28646a5ab47SPeng Tao const struct rpc_call_ops *call_ops, int how, int flags); 287d4581383SWeston Andros Adamson void nfs_free_request(struct nfs_page *req); 28848d635f1SPeng Tao struct nfs_pgio_mirror * 28948d635f1SPeng Tao nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc); 29000bfa30aSAnna Schumaker 291138a2935STrond Myklebust static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1, 292138a2935STrond Myklebust const struct nfs_open_context *ctx2) 293138a2935STrond Myklebust { 294a52458b4SNeilBrown return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state; 295138a2935STrond Myklebust } 296138a2935STrond Myklebust 297f7b422b1SDavid Howells /* nfs2xdr.c */ 298499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs_procedures[]; 299573c4e1eSChuck Lever extern int nfs2_decode_dirent(struct xdr_stream *, 300a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 301f7b422b1SDavid Howells 302f7b422b1SDavid Howells /* nfs3xdr.c */ 303499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs3_procedures[]; 304573c4e1eSChuck Lever extern int nfs3_decode_dirent(struct xdr_stream *, 305a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 306f7b422b1SDavid Howells 307f7b422b1SDavid Howells /* nfs4xdr.c */ 30889d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 309573c4e1eSChuck Lever extern int nfs4_decode_dirent(struct xdr_stream *, 310a7a3b1e9SBenjamin Coddington struct nfs_entry *, bool); 3117d4e2747SDavid Howells #endif 3122449ea2eSAlexandros Batsakis #ifdef CONFIG_NFS_V4_1 3132449ea2eSAlexandros Batsakis extern const u32 nfs41_maxread_overhead; 3142449ea2eSAlexandros Batsakis extern const u32 nfs41_maxwrite_overhead; 315f1c097beSAndy Adamson extern const u32 nfs41_maxgetdevinfo_overhead; 3162449ea2eSAlexandros Batsakis #endif 317f7b422b1SDavid Howells 318f7b422b1SDavid Howells /* nfs4proc.c */ 31989d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 320499b4988SChristoph Hellwig extern const struct rpc_procinfo nfs4_procedures[]; 321d75d5414SAndrew Morton #endif 322f7b422b1SDavid Howells 323694e096fSAnna Schumaker #ifdef CONFIG_NFS_V4_SECURITY_LABEL 324694e096fSAnna Schumaker extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); 325a49c2691SKinglong Mee static inline struct nfs4_label * 326a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 327a49c2691SKinglong Mee { 328a49c2691SKinglong Mee if (!dst || !src) 329a49c2691SKinglong Mee return NULL; 330a49c2691SKinglong Mee 331a49c2691SKinglong Mee if (src->len > NFS4_MAXLABELLEN) 332a49c2691SKinglong Mee return NULL; 333a49c2691SKinglong Mee 334a49c2691SKinglong Mee dst->lfs = src->lfs; 335a49c2691SKinglong Mee dst->pi = src->pi; 336a49c2691SKinglong Mee dst->len = src->len; 337a49c2691SKinglong Mee memcpy(dst->label, src->label, src->len); 338a49c2691SKinglong Mee 339a49c2691SKinglong Mee return dst; 340a49c2691SKinglong Mee } 341694e096fSAnna Schumaker static inline void nfs4_label_free(struct nfs4_label *label) 342694e096fSAnna Schumaker { 343694e096fSAnna Schumaker if (label) { 344694e096fSAnna Schumaker kfree(label->label); 345694e096fSAnna Schumaker kfree(label); 346694e096fSAnna Schumaker } 347694e096fSAnna Schumaker return; 348694e096fSAnna Schumaker } 349fd1defc2STrond Myklebust 350fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 351fd1defc2STrond Myklebust { 352fd1defc2STrond Myklebust if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) 353fd1defc2STrond Myklebust nfsi->cache_validity |= NFS_INO_INVALID_LABEL; 354fd1defc2STrond Myklebust } 355694e096fSAnna Schumaker #else 356694e096fSAnna Schumaker static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } 357694e096fSAnna Schumaker static inline void nfs4_label_free(void *label) {} 358fd1defc2STrond Myklebust static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) 359fd1defc2STrond Myklebust { 360fd1defc2STrond Myklebust } 361a49c2691SKinglong Mee static inline struct nfs4_label * 362a49c2691SKinglong Mee nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src) 363a49c2691SKinglong Mee { 364a49c2691SKinglong Mee return NULL; 365a49c2691SKinglong Mee } 366694e096fSAnna Schumaker #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 367694e096fSAnna Schumaker 3687fe5c398STrond Myklebust /* proc.c */ 3697fe5c398STrond Myklebust void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 3708cab4c39SChuck Lever extern struct nfs_client *nfs_init_client(struct nfs_client *clp, 3715c6e5b60STrond Myklebust const struct nfs_client_initdata *); 3727fe5c398STrond Myklebust 373979df72eSTrond Myklebust /* dir.c */ 3741bcf4c5cSTrond Myklebust extern void nfs_advise_use_readdirplus(struct inode *dir); 375311324adSTrond Myklebust extern void nfs_force_use_readdirplus(struct inode *dir); 3761ab6c499SDave Chinner extern unsigned long nfs_access_cache_count(struct shrinker *shrink, 3771ab6c499SDave Chinner struct shrink_control *sc); 3781ab6c499SDave Chinner extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, 3791495f230SYing Han struct shrink_control *sc); 380597d9289SBryan Schumaker struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); 381549c7297SChristian Brauner int nfs_create(struct user_namespace *, struct inode *, struct dentry *, 382549c7297SChristian Brauner umode_t, bool); 383549c7297SChristian Brauner int nfs_mkdir(struct user_namespace *, struct inode *, struct dentry *, 384549c7297SChristian Brauner umode_t); 385597d9289SBryan Schumaker int nfs_rmdir(struct inode *, struct dentry *); 386597d9289SBryan Schumaker int nfs_unlink(struct inode *, struct dentry *); 387549c7297SChristian Brauner int nfs_symlink(struct user_namespace *, struct inode *, struct dentry *, 388549c7297SChristian Brauner const char *); 389597d9289SBryan Schumaker int nfs_link(struct dentry *, struct inode *, struct dentry *); 390549c7297SChristian Brauner int nfs_mknod(struct user_namespace *, struct inode *, struct dentry *, umode_t, 391549c7297SChristian Brauner dev_t); 392549c7297SChristian Brauner int nfs_rename(struct user_namespace *, struct inode *, struct dentry *, 3931cd66c93SMiklos Szeredi struct inode *, struct dentry *, unsigned int); 394979df72eSTrond Myklebust 395ce4ef7c0SBryan Schumaker /* file.c */ 3964ff79bc7SChristoph Hellwig int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync); 397ce4ef7c0SBryan Schumaker loff_t nfs_file_llseek(struct file *, loff_t, int); 3983aa2d199SAl Viro ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); 399ce4ef7c0SBryan Schumaker int nfs_file_mmap(struct file *, struct vm_area_struct *); 400edaf4369SAl Viro ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); 401ce4ef7c0SBryan Schumaker int nfs_file_release(struct inode *, struct file *); 402ce4ef7c0SBryan Schumaker int nfs_lock(struct file *, int, struct file_lock *); 403ce4ef7c0SBryan Schumaker int nfs_flock(struct file *, int, struct file_lock *); 404ce4ef7c0SBryan Schumaker int nfs_check_flags(int); 405ce4ef7c0SBryan Schumaker 406f7b422b1SDavid Howells /* inode.c */ 4075746006fSTrond Myklebust extern struct workqueue_struct *nfsiod_workqueue; 408f7b422b1SDavid Howells extern struct inode *nfs_alloc_inode(struct super_block *sb); 409ca1a199eSAl Viro extern void nfs_free_inode(struct inode *); 410a9185b41SChristoph Hellwig extern int nfs_write_inode(struct inode *, struct writeback_control *); 411eed99357STrond Myklebust extern int nfs_drop_inode(struct inode *); 41219d87ca3SBryan Schumaker extern void nfs_clear_inode(struct inode *); 413b57922d9SAl Viro extern void nfs_evict_inode(struct inode *); 414*fd6d3feeSTrond Myklebust extern void nfs_zap_acl_cache(struct inode *inode); 415*fd6d3feeSTrond Myklebust extern void nfs_set_cache_invalid(struct inode *inode, unsigned long flags); 41661540bf6STrond Myklebust extern bool nfs_check_cache_invalid(struct inode *, unsigned long); 417dfd01f02SPeter Zijlstra extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode); 4185e4def20SDavid Howells extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode); 419f7b422b1SDavid Howells 420f7b422b1SDavid Howells /* super.c */ 4216a74490dSBryan Schumaker extern const struct super_operations nfs_sops; 4224d4b69ddSWeston Andros Adamson bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); 423f2aedb71SDavid Howells int nfs_try_get_tree(struct fs_context *); 424f2aedb71SDavid Howells int nfs_get_tree_common(struct fs_context *); 425fbdefd64SBryan Schumaker void nfs_kill_super(struct super_block *); 4264ebd9ab3SDominik Hackl 427f7b422b1SDavid Howells extern struct rpc_stat nfs_rpcstat; 4284ebd9ab3SDominik Hackl 429f7b422b1SDavid Howells extern int __init register_nfs_fs(void); 430f7b422b1SDavid Howells extern void __exit unregister_nfs_fs(void); 431ea7c38feSTrond Myklebust extern bool nfs_sb_active(struct super_block *sb); 4321daef0a8STrond Myklebust extern void nfs_sb_deactive(struct super_block *sb); 4333c9e502bSTrond Myklebust extern int nfs_client_for_each_server(struct nfs_client *clp, 4343c9e502bSTrond Myklebust int (*fn)(struct nfs_server *, void *), 4353c9e502bSTrond Myklebust void *data); 436a5864c99STrond Myklebust /* io.c */ 437a5864c99STrond Myklebust extern void nfs_start_io_read(struct inode *inode); 438a5864c99STrond Myklebust extern void nfs_end_io_read(struct inode *inode); 439a5864c99STrond Myklebust extern void nfs_start_io_write(struct inode *inode); 440a5864c99STrond Myklebust extern void nfs_end_io_write(struct inode *inode); 441a5864c99STrond Myklebust extern void nfs_start_io_direct(struct inode *inode); 442a5864c99STrond Myklebust extern void nfs_end_io_direct(struct inode *inode); 443a5864c99STrond Myklebust 444651b0e70STrond Myklebust static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi) 445651b0e70STrond Myklebust { 446651b0e70STrond Myklebust return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0; 447651b0e70STrond Myklebust } 448651b0e70STrond Myklebust 449f7b422b1SDavid Howells /* namespace.c */ 45097a54868SBen Hutchings #define NFS_PATH_CANONICAL 1 451b514f872SAl Viro extern char *nfs_path(char **p, struct dentry *dentry, 45297a54868SBen Hutchings char *buffer, ssize_t buflen, unsigned flags); 45336d43a43SDavid Howells extern struct vfsmount *nfs_d_automount(struct path *path); 454f2aedb71SDavid Howells int nfs_submount(struct fs_context *, struct nfs_server *); 455f2aedb71SDavid Howells int nfs_do_submount(struct fs_context *); 456f7b422b1SDavid Howells 45754ceac45SDavid Howells /* getroot.c */ 45862a55d08SScott Mayhew extern int nfs_get_root(struct super_block *s, struct fs_context *fc); 45989d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4) 4605e6b1990STrond Myklebust extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); 4617d4e2747SDavid Howells #endif 462f7b422b1SDavid Howells 463061ae2edSFred Isaman struct nfs_pgio_completion_ops; 464f11c88afSAndy Adamson /* read.c */ 465584aa810SFred Isaman extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, 466fab5fc25SChristoph Hellwig struct inode *inode, bool force_mds, 467584aa810SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 468f11c88afSAndy Adamson extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 469493292ddSTrond Myklebust extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 470e885de1aSTrond Myklebust 471fbdefd64SBryan Schumaker /* super.c */ 472fbdefd64SBryan Schumaker void nfs_umount_begin(struct super_block *); 473fbdefd64SBryan Schumaker int nfs_statfs(struct dentry *, struct kstatfs *); 474fbdefd64SBryan Schumaker int nfs_show_options(struct seq_file *, struct dentry *); 475fbdefd64SBryan Schumaker int nfs_show_devname(struct seq_file *, struct dentry *); 476fbdefd64SBryan Schumaker int nfs_show_path(struct seq_file *, struct dentry *); 477fbdefd64SBryan Schumaker int nfs_show_stats(struct seq_file *, struct dentry *); 478f2aedb71SDavid Howells int nfs_reconfigure(struct fs_context *); 479fbdefd64SBryan Schumaker 480def6ed7eSAndy Adamson /* write.c */ 4811763da12SFred Isaman extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, 482a20c93e3SChristoph Hellwig struct inode *inode, int ioflags, bool force_mds, 4831763da12SFred Isaman const struct nfs_pgio_completion_ops *compl_ops); 484dce81290STrond Myklebust extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 4850b7c0153SFred Isaman extern void nfs_commit_free(struct nfs_commit_data *p); 486def6ed7eSAndy Adamson extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 4870b7c0153SFred Isaman extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); 4880b7c0153SFred Isaman extern int nfs_initiate_commit(struct rpc_clnt *clnt, 4890b7c0153SFred Isaman struct nfs_commit_data *data, 490c36aae9aSPeng Tao const struct nfs_rpc_ops *nfs_ops, 491e0c2b380SFred Isaman const struct rpc_call_ops *call_ops, 4929f0ec176SAndy Adamson int how, int flags); 4930b7c0153SFred Isaman extern void nfs_init_commit(struct nfs_commit_data *data, 494e0c2b380SFred Isaman struct list_head *head, 495f453a54aSFred Isaman struct pnfs_layout_segment *lseg, 496f453a54aSFred Isaman struct nfs_commit_info *cinfo); 4971763da12SFred Isaman int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, 4981763da12SFred Isaman struct nfs_commit_info *cinfo, int max); 499ce59515cSAnna Schumaker unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); 5001763da12SFred Isaman int nfs_scan_commit(struct inode *inode, struct list_head *dst, 5011763da12SFred Isaman struct nfs_commit_info *cinfo); 5021763da12SFred Isaman void nfs_mark_request_commit(struct nfs_page *req, 5031763da12SFred Isaman struct pnfs_layout_segment *lseg, 504b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 505b57ff130SWeston Andros Adamson u32 ds_commit_idx); 506c65e6254SWeston Andros Adamson int nfs_write_need_commit(struct nfs_pgio_header *); 507a08a8cd3STrond Myklebust void nfs_writeback_update_inode(struct nfs_pgio_header *hdr); 5081763da12SFred Isaman int nfs_generic_commit_list(struct inode *inode, struct list_head *head, 5091763da12SFred Isaman int how, struct nfs_commit_info *cinfo); 510e0c2b380SFred Isaman void nfs_retry_commit(struct list_head *page_list, 511ea2cf228SFred Isaman struct pnfs_layout_segment *lseg, 512b57ff130SWeston Andros Adamson struct nfs_commit_info *cinfo, 513b57ff130SWeston Andros Adamson u32 ds_commit_idx); 5140b7c0153SFred Isaman void nfs_commitdata_release(struct nfs_commit_data *data); 5156272dcc6SAnna Schumaker void nfs_request_add_commit_list(struct nfs_page *req, 516ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 51786d80f97STrond Myklebust void nfs_request_add_commit_list_locked(struct nfs_page *req, 51886d80f97STrond Myklebust struct list_head *dst, 51986d80f97STrond Myklebust struct nfs_commit_info *cinfo); 520ea2cf228SFred Isaman void nfs_request_remove_commit_list(struct nfs_page *req, 521ea2cf228SFred Isaman struct nfs_commit_info *cinfo); 522ea2cf228SFred Isaman void nfs_init_cinfo(struct nfs_commit_info *cinfo, 523ea2cf228SFred Isaman struct inode *inode, 524ea2cf228SFred Isaman struct nfs_direct_req *dreq); 525dc24826bSAndy Adamson int nfs_key_timeout_notify(struct file *filp, struct inode *inode); 526ce52914eSScott Mayhew bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode); 527a7d42ddbSWeston Andros Adamson void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio); 528e0c2b380SFred Isaman 529837bb1d7STrond Myklebust int nfs_filemap_write_and_wait_range(struct address_space *mapping, 530837bb1d7STrond Myklebust loff_t lstart, loff_t lend); 531837bb1d7STrond Myklebust 532a5314a74STrond Myklebust #ifdef CONFIG_NFS_V4_1 533e3b9f7e6STrond Myklebust static inline void 534e3b9f7e6STrond Myklebust pnfs_bucket_clear_pnfs_ds_commit_verifiers(struct pnfs_commit_bucket *buckets, 535e3b9f7e6STrond Myklebust unsigned int nbuckets) 536e3b9f7e6STrond Myklebust { 537e3b9f7e6STrond Myklebust unsigned int i; 538e3b9f7e6STrond Myklebust 539e3b9f7e6STrond Myklebust for (i = 0; i < nbuckets; i++) 540e3b9f7e6STrond Myklebust buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; 541e3b9f7e6STrond Myklebust } 542a5314a74STrond Myklebust static inline 543a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 544a5314a74STrond Myklebust { 545e3b9f7e6STrond Myklebust struct pnfs_commit_array *array; 546a5314a74STrond Myklebust 547a9901899STrond Myklebust rcu_read_lock(); 548a9901899STrond Myklebust list_for_each_entry_rcu(array, &cinfo->commits, cinfo_list) 549e3b9f7e6STrond Myklebust pnfs_bucket_clear_pnfs_ds_commit_verifiers(array->buckets, 550e3b9f7e6STrond Myklebust array->nbuckets); 551a9901899STrond Myklebust rcu_read_unlock(); 552a5314a74STrond Myklebust } 553a5314a74STrond Myklebust #else 554a5314a74STrond Myklebust static inline 555a5314a74STrond Myklebust void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo) 556a5314a74STrond Myklebust { 557a5314a74STrond Myklebust } 558a5314a74STrond Myklebust #endif 559a5314a74STrond Myklebust 560074cc1deSTrond Myklebust #ifdef CONFIG_MIGRATION 561074cc1deSTrond Myklebust extern int nfs_migrate_page(struct address_space *, 562a6bc32b8SMel Gorman struct page *, struct page *, enum migrate_mode); 563074cc1deSTrond Myklebust #endif 564def6ed7eSAndy Adamson 5658fc3c386STrond Myklebust static inline int 5668fc3c386STrond Myklebust nfs_write_verifier_cmp(const struct nfs_write_verifier *v1, 5678fc3c386STrond Myklebust const struct nfs_write_verifier *v2) 5688fc3c386STrond Myklebust { 5698fc3c386STrond Myklebust return memcmp(v1->data, v2->data, sizeof(v1->data)); 5708fc3c386STrond Myklebust } 5718fc3c386STrond Myklebust 5721f28476dSTrond Myklebust static inline bool 5731f28476dSTrond Myklebust nfs_write_match_verf(const struct nfs_writeverf *verf, 5741f28476dSTrond Myklebust struct nfs_page *req) 5751f28476dSTrond Myklebust { 5761f28476dSTrond Myklebust return verf->committed > NFS_UNSTABLE && 5771f28476dSTrond Myklebust !nfs_write_verifier_cmp(&req->wb_verf, &verf->verifier); 5781f28476dSTrond Myklebust } 5791f28476dSTrond Myklebust 5800e862a40SJeff Layton /* unlink.c */ 5810e862a40SJeff Layton extern struct rpc_task * 5820e862a40SJeff Layton nfs_async_rename(struct inode *old_dir, struct inode *new_dir, 5830e862a40SJeff Layton struct dentry *old_dentry, struct dentry *new_dentry, 5840e862a40SJeff Layton void (*complete)(struct rpc_task *, struct nfs_renamedata *)); 5850e862a40SJeff Layton extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); 5860e862a40SJeff Layton 5871763da12SFred Isaman /* direct.c */ 5881763da12SFred Isaman void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, 5891763da12SFred Isaman struct nfs_direct_req *dreq); 5906296556fSPeng Tao extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); 5911763da12SFred Isaman 592cccef3b9SAndy Adamson /* nfs4proc.c */ 5938cab4c39SChuck Lever extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, 5945c6e5b60STrond Myklebust const struct nfs_client_initdata *); 59505f4c350SChuck Lever extern int nfs40_walk_client_list(struct nfs_client *clp, 59605f4c350SChuck Lever struct nfs_client **result, 597a52458b4SNeilBrown const struct cred *cred); 59805f4c350SChuck Lever extern int nfs41_walk_client_list(struct nfs_client *clp, 59905f4c350SChuck Lever struct nfs_client **result, 600a52458b4SNeilBrown const struct cred *cred); 60110e037d1SSantosh kumar pradhan extern void nfs4_test_session_trunk(struct rpc_clnt *clnt, 60210e037d1SSantosh kumar pradhan struct rpc_xprt *xprt, 60310e037d1SSantosh kumar pradhan void *data); 604cccef3b9SAndy Adamson 605ea7c38feSTrond Myklebust static inline struct inode *nfs_igrab_and_active(struct inode *inode) 606ea7c38feSTrond Myklebust { 607896567eeSTrond Myklebust struct super_block *sb = inode->i_sb; 608896567eeSTrond Myklebust 609896567eeSTrond Myklebust if (sb && nfs_sb_active(sb)) { 610896567eeSTrond Myklebust if (igrab(inode)) 611ea7c38feSTrond Myklebust return inode; 612896567eeSTrond Myklebust nfs_sb_deactive(sb); 613896567eeSTrond Myklebust } 614896567eeSTrond Myklebust return NULL; 615ea7c38feSTrond Myklebust } 616ea7c38feSTrond Myklebust 617ea7c38feSTrond Myklebust static inline void nfs_iput_and_deactive(struct inode *inode) 618ea7c38feSTrond Myklebust { 619ea7c38feSTrond Myklebust if (inode != NULL) { 620ea7c38feSTrond Myklebust struct super_block *sb = inode->i_sb; 621ea7c38feSTrond Myklebust 622ea7c38feSTrond Myklebust iput(inode); 623ea7c38feSTrond Myklebust nfs_sb_deactive(sb); 624ea7c38feSTrond Myklebust } 625ea7c38feSTrond Myklebust } 626ea7c38feSTrond Myklebust 627557134a3SAndy Adamson /* 628f7b422b1SDavid Howells * Determine the device name as a string 629f7b422b1SDavid Howells */ 630b514f872SAl Viro static inline char *nfs_devname(struct dentry *dentry, 631f7b422b1SDavid Howells char *buffer, ssize_t buflen) 632f7b422b1SDavid Howells { 633b514f872SAl Viro char *dummy; 63497a54868SBen Hutchings return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); 635f7b422b1SDavid Howells } 636f7b422b1SDavid Howells 637f7b422b1SDavid Howells /* 638f7b422b1SDavid Howells * Determine the actual block size (and log2 thereof) 639f7b422b1SDavid Howells */ 640f7b422b1SDavid Howells static inline 641f7b422b1SDavid Howells unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 642f7b422b1SDavid Howells { 643f7b422b1SDavid Howells /* make sure blocksize is a power of two */ 644f7b422b1SDavid Howells if ((bsize & (bsize - 1)) || nrbitsp) { 645f7b422b1SDavid Howells unsigned char nrbits; 646f7b422b1SDavid Howells 647f7b422b1SDavid Howells for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 648f7b422b1SDavid Howells ; 649f7b422b1SDavid Howells bsize = 1 << nrbits; 650f7b422b1SDavid Howells if (nrbitsp) 651f7b422b1SDavid Howells *nrbitsp = nrbits; 652f7b422b1SDavid Howells } 653f7b422b1SDavid Howells 654f7b422b1SDavid Howells return bsize; 655f7b422b1SDavid Howells } 656f7b422b1SDavid Howells 657f7b422b1SDavid Howells /* 658f7b422b1SDavid Howells * Calculate the number of 512byte blocks used. 659f7b422b1SDavid Howells */ 6609eaa67c6SChuck Lever static inline blkcnt_t nfs_calc_block_size(u64 tsize) 661f7b422b1SDavid Howells { 6629eaa67c6SChuck Lever blkcnt_t used = (tsize + 511) >> 9; 663f7b422b1SDavid Howells return (used > ULONG_MAX) ? ULONG_MAX : used; 664f7b422b1SDavid Howells } 665f7b422b1SDavid Howells 666f7b422b1SDavid Howells /* 667f7b422b1SDavid Howells * Compute and set NFS server blocksize 668f7b422b1SDavid Howells */ 669f7b422b1SDavid Howells static inline 670f7b422b1SDavid Howells unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 671f7b422b1SDavid Howells { 672f7b422b1SDavid Howells if (bsize < NFS_MIN_FILE_IO_SIZE) 673f7b422b1SDavid Howells bsize = NFS_DEF_FILE_IO_SIZE; 674f7b422b1SDavid Howells else if (bsize >= NFS_MAX_FILE_IO_SIZE) 675f7b422b1SDavid Howells bsize = NFS_MAX_FILE_IO_SIZE; 676f7b422b1SDavid Howells 677f7b422b1SDavid Howells return nfs_block_bits(bsize, nrbitsp); 678f7b422b1SDavid Howells } 679f7b422b1SDavid Howells 680f7b422b1SDavid Howells /* 681f7b422b1SDavid Howells * Determine the maximum file size for a superblock 682f7b422b1SDavid Howells */ 683f7b422b1SDavid Howells static inline 684f7b422b1SDavid Howells void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 685f7b422b1SDavid Howells { 686f7b422b1SDavid Howells sb->s_maxbytes = (loff_t)maxfilesize; 687f7b422b1SDavid Howells if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 688f7b422b1SDavid Howells sb->s_maxbytes = MAX_LFS_FILESIZE; 689f7b422b1SDavid Howells } 69049a70f27STrond Myklebust 69149a70f27STrond Myklebust /* 6928d92890bSNeilBrown * Record the page as unstable (an extra writeback period) and mark its 6938d92890bSNeilBrown * inode as dirty. 694d15bc38dSTom Haynes */ 695d15bc38dSTom Haynes static inline 69686d80f97STrond Myklebust void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo) 697d15bc38dSTom Haynes { 69886d80f97STrond Myklebust if (!cinfo->dreq) { 699d15bc38dSTom Haynes struct inode *inode = page_file_mapping(page)->host; 700d15bc38dSTom Haynes 7018d92890bSNeilBrown /* This page is really still in write-back - just that the 7028d92890bSNeilBrown * writeback is happening on the server now. 7038d92890bSNeilBrown */ 7048d92890bSNeilBrown inc_node_page_state(page, NR_WRITEBACK); 7058d92890bSNeilBrown inc_wb_stat(&inode_to_bdi(inode)->wb, WB_WRITEBACK); 706d15bc38dSTom Haynes __mark_inode_dirty(inode, I_DIRTY_DATASYNC); 707d15bc38dSTom Haynes } 70886d80f97STrond Myklebust } 709d15bc38dSTom Haynes 710d15bc38dSTom Haynes /* 71149a70f27STrond Myklebust * Determine the number of bytes of data the page contains 71249a70f27STrond Myklebust */ 71349a70f27STrond Myklebust static inline 71449a70f27STrond Myklebust unsigned int nfs_page_length(struct page *page) 71549a70f27STrond Myklebust { 716d56b4ddfSMel Gorman loff_t i_size = i_size_read(page_file_mapping(page)->host); 71749a70f27STrond Myklebust 71849a70f27STrond Myklebust if (i_size > 0) { 7198cd79788SHuang Ying pgoff_t index = page_index(page); 72009cbfeafSKirill A. Shutemov pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT; 7218cd79788SHuang Ying if (index < end_index) 72209cbfeafSKirill A. Shutemov return PAGE_SIZE; 7238cd79788SHuang Ying if (index == end_index) 72409cbfeafSKirill A. Shutemov return ((i_size - 1) & ~PAGE_MASK) + 1; 72549a70f27STrond Myklebust } 72649a70f27STrond Myklebust return 0; 72749a70f27STrond Myklebust } 7288d5658c9STrond Myklebust 7298d5658c9STrond Myklebust /* 7300b26a0bfSTrond Myklebust * Convert a umode to a dirent->d_type 7310b26a0bfSTrond Myklebust */ 7320b26a0bfSTrond Myklebust static inline 7330b26a0bfSTrond Myklebust unsigned char nfs_umode_to_dtype(umode_t mode) 7340b26a0bfSTrond Myklebust { 7350b26a0bfSTrond Myklebust return (mode >> 12) & 15; 7360b26a0bfSTrond Myklebust } 7370b26a0bfSTrond Myklebust 7380b26a0bfSTrond Myklebust /* 7398d5658c9STrond Myklebust * Determine the number of pages in an array of length 'len' and 7408d5658c9STrond Myklebust * with a base offset of 'base' 7418d5658c9STrond Myklebust */ 7428d5658c9STrond Myklebust static inline 7438d5658c9STrond Myklebust unsigned int nfs_page_array_len(unsigned int base, size_t len) 7448d5658c9STrond Myklebust { 7458d5658c9STrond Myklebust return ((unsigned long)len + (unsigned long)base + 7468d5658c9STrond Myklebust PAGE_SIZE - 1) >> PAGE_SHIFT; 7478d5658c9STrond Myklebust } 7480110ee15STrond Myklebust 7493a1556e8STrond Myklebust /* 750ae08483cSArnd Bergmann * Convert a struct timespec64 into a 64-bit change attribute 7513a1556e8STrond Myklebust * 752ae08483cSArnd Bergmann * This does approximately the same thing as timespec64_to_ns(), 7533a1556e8STrond Myklebust * but for calculation efficiency, we multiply the seconds by 7543a1556e8STrond Myklebust * 1024*1024*1024. 7553a1556e8STrond Myklebust */ 7563a1556e8STrond Myklebust static inline 757e86d5a02STrond Myklebust u64 nfs_timespec_to_change_attr(const struct timespec64 *ts) 7583a1556e8STrond Myklebust { 7593a1556e8STrond Myklebust return ((u64)ts->tv_sec << 30) + ts->tv_nsec; 7603a1556e8STrond Myklebust } 7611264a2f0STrond Myklebust 7621264a2f0STrond Myklebust #ifdef CONFIG_CRC32 7631264a2f0STrond Myklebust /** 7641264a2f0STrond Myklebust * nfs_fhandle_hash - calculate the crc32 hash for the filehandle 7651264a2f0STrond Myklebust * @fh - pointer to filehandle 7661264a2f0STrond Myklebust * 7671264a2f0STrond Myklebust * returns a crc32 hash for the filehandle that is compatible with 7681264a2f0STrond Myklebust * the one displayed by "wireshark". 7691264a2f0STrond Myklebust */ 7701264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7711264a2f0STrond Myklebust { 7721264a2f0STrond Myklebust return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); 7731264a2f0STrond Myklebust } 77448c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid) 77548c9579aSOlga Kornievskaia { 77648c9579aSOlga Kornievskaia return ~crc32_le(0xFFFFFFFF, &stateid->other[0], 77748c9579aSOlga Kornievskaia NFS4_STATEID_OTHER_SIZE); 77848c9579aSOlga Kornievskaia } 7791264a2f0STrond Myklebust #else 7801264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) 7811264a2f0STrond Myklebust { 7821264a2f0STrond Myklebust return 0; 7831264a2f0STrond Myklebust } 78448c9579aSOlga Kornievskaia static inline u32 nfs_stateid_hash(nfs4_stateid *stateid) 78548c9579aSOlga Kornievskaia { 78648c9579aSOlga Kornievskaia return 0; 78748c9579aSOlga Kornievskaia } 7881264a2f0STrond Myklebust #endif 7890bcbf039SPeng Tao 7900bcbf039SPeng Tao static inline bool nfs_error_is_fatal(int err) 7910bcbf039SPeng Tao { 7920bcbf039SPeng Tao switch (err) { 7930bcbf039SPeng Tao case -ERESTARTSYS: 7947dc58ca5STrond Myklebust case -EINTR: 79554551d85STrond Myklebust case -EACCES: 79654551d85STrond Myklebust case -EDQUOT: 79754551d85STrond Myklebust case -EFBIG: 7980bcbf039SPeng Tao case -EIO: 7990bcbf039SPeng Tao case -ENOSPC: 8000bcbf039SPeng Tao case -EROFS: 80154551d85STrond Myklebust case -ESTALE: 8020bcbf039SPeng Tao case -E2BIG: 8032dc23affSTrond Myklebust case -ENOMEM: 80411982a7cSTrond Myklebust case -ETIMEDOUT: 8050bcbf039SPeng Tao return true; 8060bcbf039SPeng Tao default: 8070bcbf039SPeng Tao return false; 8080bcbf039SPeng Tao } 8090bcbf039SPeng Tao } 810bf4b4905SNeilBrown 8118f54c7a4STrond Myklebust static inline bool nfs_error_is_fatal_on_server(int err) 8128f54c7a4STrond Myklebust { 8138f54c7a4STrond Myklebust switch (err) { 8148f54c7a4STrond Myklebust case 0: 8158f54c7a4STrond Myklebust case -ERESTARTSYS: 8168f54c7a4STrond Myklebust case -EINTR: 8178f54c7a4STrond Myklebust return false; 8188f54c7a4STrond Myklebust } 8198f54c7a4STrond Myklebust return nfs_error_is_fatal(err); 8208f54c7a4STrond Myklebust } 8219954bf92SDavid Howells 8229954bf92SDavid Howells /* 8239954bf92SDavid Howells * Select between a default port value and a user-specified port value. 8249954bf92SDavid Howells * If a zero value is set, then autobind will be used. 8259954bf92SDavid Howells */ 8269954bf92SDavid Howells static inline void nfs_set_port(struct sockaddr *sap, int *port, 8279954bf92SDavid Howells const unsigned short default_port) 8289954bf92SDavid Howells { 8299954bf92SDavid Howells if (*port == NFS_UNSPEC_PORT) 8309954bf92SDavid Howells *port = default_port; 8319954bf92SDavid Howells 8329954bf92SDavid Howells rpc_set_port(sap, *port); 8339954bf92SDavid Howells } 834