1f7b422b1SDavid Howells /* 2f7b422b1SDavid Howells * NFS internal definitions 3f7b422b1SDavid Howells */ 4f7b422b1SDavid Howells 5eedc020eSAndy Adamson #include "nfs4_fs.h" 6f7b422b1SDavid Howells #include <linux/mount.h> 7f9c3a380SEric Paris #include <linux/security.h> 8f7b422b1SDavid Howells 908734048SDavid Howells #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) 1008734048SDavid Howells 1154ceac45SDavid Howells struct nfs_string; 1254ceac45SDavid Howells 1354ceac45SDavid Howells /* Maximum number of readahead requests 1454ceac45SDavid Howells * FIXME: this should really be a sysctl so that users may tune it to suit 1554ceac45SDavid Howells * their needs. People that do NFS over a slow network, might for 1654ceac45SDavid Howells * instance want to reduce it to something closer to 1 for improved 1754ceac45SDavid Howells * interactive response. 1854ceac45SDavid Howells */ 1954ceac45SDavid Howells #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) 2054ceac45SDavid Howells 21eedc020eSAndy Adamson /* 22eedc020eSAndy Adamson * Determine if sessions are in use. 23eedc020eSAndy Adamson */ 24eedc020eSAndy Adamson static inline int nfs4_has_session(const struct nfs_client *clp) 25eedc020eSAndy Adamson { 26eedc020eSAndy Adamson #ifdef CONFIG_NFS_V4_1 27eedc020eSAndy Adamson if (clp->cl_session) 28eedc020eSAndy Adamson return 1; 29eedc020eSAndy Adamson #endif /* CONFIG_NFS_V4_1 */ 30eedc020eSAndy Adamson return 0; 31eedc020eSAndy Adamson } 32eedc020eSAndy Adamson 33d8cb1a7cSAlexandros Batsakis static inline int nfs4_has_persistent_session(const struct nfs_client *clp) 34d8cb1a7cSAlexandros Batsakis { 35d8cb1a7cSAlexandros Batsakis #ifdef CONFIG_NFS_V4_1 36d8cb1a7cSAlexandros Batsakis if (nfs4_has_session(clp)) 37d8cb1a7cSAlexandros Batsakis return (clp->cl_session->flags & SESSION4_PERSIST); 38d8cb1a7cSAlexandros Batsakis #endif /* CONFIG_NFS_V4_1 */ 39d8cb1a7cSAlexandros Batsakis return 0; 40d8cb1a7cSAlexandros Batsakis } 41d8cb1a7cSAlexandros Batsakis 427ebb9315SBryan Schumaker static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) 437ebb9315SBryan Schumaker { 447ebb9315SBryan Schumaker if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid)) 457ebb9315SBryan Schumaker fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT; 467ebb9315SBryan Schumaker } 477ebb9315SBryan Schumaker 48533eb461SAndy Adamson static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) 49533eb461SAndy Adamson { 50533eb461SAndy Adamson if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) || 51533eb461SAndy Adamson (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) && 52533eb461SAndy Adamson ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0))) 53533eb461SAndy Adamson return 0; 54533eb461SAndy Adamson 55533eb461SAndy Adamson fattr->fileid = fattr->mounted_on_fileid; 56533eb461SAndy Adamson return 1; 57533eb461SAndy Adamson } 58533eb461SAndy Adamson 59f7b422b1SDavid Howells struct nfs_clone_mount { 60f7b422b1SDavid Howells const struct super_block *sb; 61f7b422b1SDavid Howells const struct dentry *dentry; 62f7b422b1SDavid Howells struct nfs_fh *fh; 63f7b422b1SDavid Howells struct nfs_fattr *fattr; 64f7b422b1SDavid Howells char *hostname; 65f7b422b1SDavid Howells char *mnt_path; 666677d095SChuck Lever struct sockaddr *addr; 676677d095SChuck Lever size_t addrlen; 68f7b422b1SDavid Howells rpc_authflavor_t authflavor; 69f7b422b1SDavid Howells }; 70f7b422b1SDavid Howells 716b18eaa0S\"Talpey, Thomas\ /* 72a14017dbSChuck Lever * Note: RFC 1813 doesn't limit the number of auth flavors that 73a14017dbSChuck Lever * a server can return, so make something up. 74a14017dbSChuck Lever */ 75a14017dbSChuck Lever #define NFS_MAX_SECFLAVORS (12) 76a14017dbSChuck Lever 77a14017dbSChuck Lever /* 784cfd74fcSChuck Lever * Value used if the user did not specify a port value. 794cfd74fcSChuck Lever */ 804cfd74fcSChuck Lever #define NFS_UNSPEC_PORT (-1) 814cfd74fcSChuck Lever 824cfd74fcSChuck Lever /* 8356e4ebf8SBryan Schumaker * Maximum number of pages that readdir can use for creating 8456e4ebf8SBryan Schumaker * a vmapped array of pages. 8556e4ebf8SBryan Schumaker */ 8656e4ebf8SBryan Schumaker #define NFS_MAX_READDIR_PAGES 8 8756e4ebf8SBryan Schumaker 8856e4ebf8SBryan Schumaker /* 896b18eaa0S\"Talpey, Thomas\ * In-kernel mount arguments 906b18eaa0S\"Talpey, Thomas\ */ 916b18eaa0S\"Talpey, Thomas\ struct nfs_parsed_mount_data { 926b18eaa0S\"Talpey, Thomas\ int flags; 936b18eaa0S\"Talpey, Thomas\ int rsize, wsize; 946b18eaa0S\"Talpey, Thomas\ int timeo, retrans; 956b18eaa0S\"Talpey, Thomas\ int acregmin, acregmax, 966b18eaa0S\"Talpey, Thomas\ acdirmin, acdirmax; 976b18eaa0S\"Talpey, Thomas\ int namlen; 98b797cac7SDavid Howells unsigned int options; 996b18eaa0S\"Talpey, Thomas\ unsigned int bsize; 1006b18eaa0S\"Talpey, Thomas\ unsigned int auth_flavor_len; 1016b18eaa0S\"Talpey, Thomas\ rpc_authflavor_t auth_flavors[1]; 1026b18eaa0S\"Talpey, Thomas\ char *client_address; 103764302ccSChuck Lever unsigned int version; 1043fd5be9eSMike Sager unsigned int minorversion; 10508734048SDavid Howells char *fscache_uniq; 1066b18eaa0S\"Talpey, Thomas\ 1076b18eaa0S\"Talpey, Thomas\ struct { 1084c568017SChuck Lever struct sockaddr_storage address; 1094c568017SChuck Lever size_t addrlen; 1106b18eaa0S\"Talpey, Thomas\ char *hostname; 11178fa701fSChuck Lever u32 version; 1124cfd74fcSChuck Lever int port; 11378fa701fSChuck Lever unsigned short protocol; 1146b18eaa0S\"Talpey, Thomas\ } mount_server; 1156b18eaa0S\"Talpey, Thomas\ 1166b18eaa0S\"Talpey, Thomas\ struct { 1174c568017SChuck Lever struct sockaddr_storage address; 1184c568017SChuck Lever size_t addrlen; 1196b18eaa0S\"Talpey, Thomas\ char *hostname; 1206b18eaa0S\"Talpey, Thomas\ char *export_path; 1214cfd74fcSChuck Lever int port; 12278fa701fSChuck Lever unsigned short protocol; 1236b18eaa0S\"Talpey, Thomas\ } nfs_server; 124f9c3a380SEric Paris 125f9c3a380SEric Paris struct security_mnt_opts lsm_opts; 1266b18eaa0S\"Talpey, Thomas\ }; 1276b18eaa0S\"Talpey, Thomas\ 128146ec944SChuck Lever /* mount_clnt.c */ 129c5d120f8SChuck Lever struct nfs_mount_request { 130c5d120f8SChuck Lever struct sockaddr *sap; 131c5d120f8SChuck Lever size_t salen; 132c5d120f8SChuck Lever char *hostname; 133c5d120f8SChuck Lever char *dirpath; 134c5d120f8SChuck Lever u32 version; 135c5d120f8SChuck Lever unsigned short protocol; 136c5d120f8SChuck Lever struct nfs_fh *fh; 13750a737f8SChuck Lever int noresvport; 1388e02f6b9SChuck Lever unsigned int *auth_flav_len; 1398e02f6b9SChuck Lever rpc_authflavor_t *auth_flavs; 140c5d120f8SChuck Lever }; 141c5d120f8SChuck Lever 142c5d120f8SChuck Lever extern int nfs_mount(struct nfs_mount_request *info); 1430b524123SChuck Lever extern void nfs_umount(const struct nfs_mount_request *info); 144146ec944SChuck Lever 14524c8dbbbSDavid Howells /* client.c */ 14654ceac45SDavid Howells extern struct rpc_program nfs_program; 14754ceac45SDavid Howells 148f4eecd5dSAndy Adamson extern void nfs_cleanup_cb_ident_idr(void); 14924c8dbbbSDavid Howells extern void nfs_put_client(struct nfs_client *); 150c36fca52SAndy Adamson extern struct nfs_client *nfs4_find_client_no_ident(const struct sockaddr *); 151c36fca52SAndy Adamson extern struct nfs_client *nfs4_find_client_ident(int); 152c36fca52SAndy Adamson extern struct nfs_client * 153778be232SAndy Adamson nfs4_find_client_sessionid(const struct sockaddr *, struct nfs4_sessionid *); 1542283f8d6S\"Talpey, Thomas\ extern struct nfs_server *nfs_create_server( 1552283f8d6S\"Talpey, Thomas\ const struct nfs_parsed_mount_data *, 15654ceac45SDavid Howells struct nfs_fh *); 15791ea40b9S\"Talpey, Thomas\ extern struct nfs_server *nfs4_create_server( 15891ea40b9S\"Talpey, Thomas\ const struct nfs_parsed_mount_data *, 15954ceac45SDavid Howells struct nfs_fh *); 16054ceac45SDavid Howells extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, 16154ceac45SDavid Howells struct nfs_fh *); 16254ceac45SDavid Howells extern void nfs_free_server(struct nfs_server *server); 16354ceac45SDavid Howells extern struct nfs_server *nfs_clone_server(struct nfs_server *, 16454ceac45SDavid Howells struct nfs_fh *, 16554ceac45SDavid Howells struct nfs_fattr *); 16676db6d95SAndy Adamson extern void nfs_mark_client_ready(struct nfs_client *clp, int state); 167008f55d0SBenny Halevy extern int nfs4_check_client_ready(struct nfs_client *clp); 168d83217c1SAndy Adamson extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, 169d83217c1SAndy Adamson const struct sockaddr *ds_addr, 170d83217c1SAndy Adamson int ds_addrlen, int ds_proto); 1716aaca566SDavid Howells #ifdef CONFIG_PROC_FS 1726aaca566SDavid Howells extern int __init nfs_fs_proc_init(void); 1736aaca566SDavid Howells extern void nfs_fs_proc_exit(void); 1746aaca566SDavid Howells #else 1756aaca566SDavid Howells static inline int nfs_fs_proc_init(void) 1766aaca566SDavid Howells { 1776aaca566SDavid Howells return 0; 1786aaca566SDavid Howells } 1796aaca566SDavid Howells static inline void nfs_fs_proc_exit(void) 1806aaca566SDavid Howells { 1816aaca566SDavid Howells } 1826aaca566SDavid Howells #endif 18324c8dbbbSDavid Howells 1847d4e2747SDavid Howells /* nfs4namespace.c */ 185f7b422b1SDavid Howells #ifdef CONFIG_NFS_V4 186f8ad9c4bSAl Viro extern struct vfsmount *nfs_do_refmount(struct dentry *dentry); 187f7b422b1SDavid Howells #else 188f7b422b1SDavid Howells static inline 189f8ad9c4bSAl Viro struct vfsmount *nfs_do_refmount(struct dentry *dentry) 190f7b422b1SDavid Howells { 191f7b422b1SDavid Howells return ERR_PTR(-ENOENT); 192f7b422b1SDavid Howells } 193f7b422b1SDavid Howells #endif 194f7b422b1SDavid Howells 195f7b422b1SDavid Howells /* callback_xdr.c */ 196f7b422b1SDavid Howells extern struct svc_version nfs4_callback_version1; 19707bccc2dSAlexandros Batsakis extern struct svc_version nfs4_callback_version4; 198f7b422b1SDavid Howells 199f7b422b1SDavid Howells /* pagelist.c */ 200f7b422b1SDavid Howells extern int __init nfs_init_nfspagecache(void); 201266bee88SDavid Brownell extern void nfs_destroy_nfspagecache(void); 202f7b422b1SDavid Howells extern int __init nfs_init_readpagecache(void); 203266bee88SDavid Brownell extern void nfs_destroy_readpagecache(void); 204f7b422b1SDavid Howells extern int __init nfs_init_writepagecache(void); 205266bee88SDavid Brownell extern void nfs_destroy_writepagecache(void); 206f7b422b1SDavid Howells 207f7b422b1SDavid Howells extern int __init nfs_init_directcache(void); 208266bee88SDavid Brownell extern void nfs_destroy_directcache(void); 209f7b422b1SDavid Howells 210f7b422b1SDavid Howells /* nfs2xdr.c */ 21185828493SChuck Lever extern int nfs_stat_to_errno(enum nfs_stat); 212f7b422b1SDavid Howells extern struct rpc_procinfo nfs_procedures[]; 213573c4e1eSChuck Lever extern int nfs2_decode_dirent(struct xdr_stream *, 214573c4e1eSChuck Lever struct nfs_entry *, int); 215f7b422b1SDavid Howells 216f7b422b1SDavid Howells /* nfs3xdr.c */ 217f7b422b1SDavid Howells extern struct rpc_procinfo nfs3_procedures[]; 218573c4e1eSChuck Lever extern int nfs3_decode_dirent(struct xdr_stream *, 219573c4e1eSChuck Lever struct nfs_entry *, int); 220f7b422b1SDavid Howells 221f7b422b1SDavid Howells /* nfs4xdr.c */ 2227d4e2747SDavid Howells #ifdef CONFIG_NFS_V4 223573c4e1eSChuck Lever extern int nfs4_decode_dirent(struct xdr_stream *, 224573c4e1eSChuck Lever struct nfs_entry *, int); 2257d4e2747SDavid Howells #endif 2262449ea2eSAlexandros Batsakis #ifdef CONFIG_NFS_V4_1 2272449ea2eSAlexandros Batsakis extern const u32 nfs41_maxread_overhead; 2282449ea2eSAlexandros Batsakis extern const u32 nfs41_maxwrite_overhead; 2292449ea2eSAlexandros Batsakis #endif 230f7b422b1SDavid Howells 231f7b422b1SDavid Howells /* nfs4proc.c */ 232d75d5414SAndrew Morton #ifdef CONFIG_NFS_V4 233f7b422b1SDavid Howells extern struct rpc_procinfo nfs4_procedures[]; 2347ebb9315SBryan Schumaker void nfs_fixup_secinfo_attributes(struct nfs_fattr *, struct nfs_fh *); 235d75d5414SAndrew Morton #endif 236f7b422b1SDavid Howells 237d83217c1SAndy Adamson extern int nfs4_init_ds_session(struct nfs_client *clp); 238d83217c1SAndy Adamson 2397fe5c398STrond Myklebust /* proc.c */ 2407fe5c398STrond Myklebust void nfs_close_context(struct nfs_open_context *ctx, int is_sync); 24145a52a02SAndy Adamson extern int nfs_init_client(struct nfs_client *clp, 24245a52a02SAndy Adamson const struct rpc_timeout *timeparms, 24345a52a02SAndy Adamson const char *ip_addr, rpc_authflavor_t authflavour, 24445a52a02SAndy Adamson int noresvport); 2457fe5c398STrond Myklebust 246979df72eSTrond Myklebust /* dir.c */ 2477f8275d0SDave Chinner extern int nfs_access_cache_shrinker(struct shrinker *shrink, 2481495f230SYing Han struct shrink_control *sc); 249979df72eSTrond Myklebust 250f7b422b1SDavid Howells /* inode.c */ 2515746006fSTrond Myklebust extern struct workqueue_struct *nfsiod_workqueue; 252f7b422b1SDavid Howells extern struct inode *nfs_alloc_inode(struct super_block *sb); 253f7b422b1SDavid Howells extern void nfs_destroy_inode(struct inode *); 254a9185b41SChristoph Hellwig extern int nfs_write_inode(struct inode *, struct writeback_control *); 255b57922d9SAl Viro extern void nfs_evict_inode(struct inode *); 256f7b422b1SDavid Howells #ifdef CONFIG_NFS_V4 257b57922d9SAl Viro extern void nfs4_evict_inode(struct inode *); 258f7b422b1SDavid Howells #endif 259f41f7418STrond Myklebust void nfs_zap_acl_cache(struct inode *inode); 26072cb77f4STrond Myklebust extern int nfs_wait_bit_killable(void *word); 261f7b422b1SDavid Howells 262f7b422b1SDavid Howells /* super.c */ 26354ceac45SDavid Howells extern struct file_system_type nfs_xdev_fs_type; 264f7b422b1SDavid Howells #ifdef CONFIG_NFS_V4 26554ceac45SDavid Howells extern struct file_system_type nfs4_xdev_fs_type; 26654ceac45SDavid Howells extern struct file_system_type nfs4_referral_fs_type; 267f7b422b1SDavid Howells #endif 2684ebd9ab3SDominik Hackl 269f7b422b1SDavid Howells extern struct rpc_stat nfs_rpcstat; 2704ebd9ab3SDominik Hackl 271f7b422b1SDavid Howells extern int __init register_nfs_fs(void); 272f7b422b1SDavid Howells extern void __exit unregister_nfs_fs(void); 2731daef0a8STrond Myklebust extern void nfs_sb_active(struct super_block *sb); 2741daef0a8STrond Myklebust extern void nfs_sb_deactive(struct super_block *sb); 275f7b422b1SDavid Howells 276f7b422b1SDavid Howells /* namespace.c */ 277b514f872SAl Viro extern char *nfs_path(char **p, struct dentry *dentry, 278f7b422b1SDavid Howells char *buffer, ssize_t buflen); 27936d43a43SDavid Howells extern struct vfsmount *nfs_d_automount(struct path *path); 280fca78d6dSBryan Schumaker #ifdef CONFIG_NFS_V4 281fca78d6dSBryan Schumaker rpc_authflavor_t nfs_find_best_sec(struct nfs4_secinfo_flavors *); 282fca78d6dSBryan Schumaker #endif 283f7b422b1SDavid Howells 28454ceac45SDavid Howells /* getroot.c */ 2850d5839adSAl Viro extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, 2860d5839adSAl Viro const char *); 2877d4e2747SDavid Howells #ifdef CONFIG_NFS_V4 2880d5839adSAl Viro extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, 2890d5839adSAl Viro const char *); 29054ceac45SDavid Howells 291815409d2STrond Myklebust extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh); 2927d4e2747SDavid Howells #endif 293f7b422b1SDavid Howells 294493292ddSTrond Myklebust struct nfs_pageio_descriptor; 295f11c88afSAndy Adamson /* read.c */ 296dc70d7b3SAndy Adamson extern int nfs_initiate_read(struct nfs_read_data *data, struct rpc_clnt *clnt, 297dc70d7b3SAndy Adamson const struct rpc_call_ops *call_ops); 298f11c88afSAndy Adamson extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 299493292ddSTrond Myklebust extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc, 300493292ddSTrond Myklebust struct list_head *head); 301f11c88afSAndy Adamson 30262e4a769STrond Myklebust extern void nfs_pageio_init_read_mds(struct nfs_pageio_descriptor *pgio, 30362e4a769STrond Myklebust struct inode *inode); 304493292ddSTrond Myklebust extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); 305493292ddSTrond Myklebust extern void nfs_readdata_release(struct nfs_read_data *rdata); 306e885de1aSTrond Myklebust 307def6ed7eSAndy Adamson /* write.c */ 308dce81290STrond Myklebust extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc, 309dce81290STrond Myklebust struct list_head *head); 310dce81290STrond Myklebust extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); 311dce81290STrond Myklebust extern void nfs_writedata_release(struct nfs_write_data *wdata); 312e0c2b380SFred Isaman extern void nfs_commit_free(struct nfs_write_data *p); 313a69aef14SFred Isaman extern int nfs_initiate_write(struct nfs_write_data *data, 314a69aef14SFred Isaman struct rpc_clnt *clnt, 315a69aef14SFred Isaman const struct rpc_call_ops *call_ops, 316a69aef14SFred Isaman int how); 317def6ed7eSAndy Adamson extern void nfs_write_prepare(struct rpc_task *task, void *calldata); 318e0c2b380SFred Isaman extern int nfs_initiate_commit(struct nfs_write_data *data, 319e0c2b380SFred Isaman struct rpc_clnt *clnt, 320e0c2b380SFred Isaman const struct rpc_call_ops *call_ops, 321e0c2b380SFred Isaman int how); 322e0c2b380SFred Isaman extern void nfs_init_commit(struct nfs_write_data *data, 323e0c2b380SFred Isaman struct list_head *head, 324e0c2b380SFred Isaman struct pnfs_layout_segment *lseg); 325e0c2b380SFred Isaman void nfs_retry_commit(struct list_head *page_list, 326e0c2b380SFred Isaman struct pnfs_layout_segment *lseg); 327e0c2b380SFred Isaman void nfs_commit_clear_lock(struct nfs_inode *nfsi); 328e0c2b380SFred Isaman void nfs_commitdata_release(void *data); 329e0c2b380SFred Isaman void nfs_commit_release_pages(struct nfs_write_data *data); 330e0c2b380SFred Isaman 331074cc1deSTrond Myklebust #ifdef CONFIG_MIGRATION 332074cc1deSTrond Myklebust extern int nfs_migrate_page(struct address_space *, 333074cc1deSTrond Myklebust struct page *, struct page *); 334074cc1deSTrond Myklebust #else 335074cc1deSTrond Myklebust #define nfs_migrate_page NULL 336074cc1deSTrond Myklebust #endif 337def6ed7eSAndy Adamson 338cccef3b9SAndy Adamson /* nfs4proc.c */ 339d20581aaSBenny Halevy extern void __nfs4_read_done_cb(struct nfs_read_data *); 340cbdabc7fSAndy Adamson extern void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data); 34145a52a02SAndy Adamson extern int nfs4_init_client(struct nfs_client *clp, 34245a52a02SAndy Adamson const struct rpc_timeout *timeparms, 34345a52a02SAndy Adamson const char *ip_addr, 34445a52a02SAndy Adamson rpc_authflavor_t authflavour, 34545a52a02SAndy Adamson int noresvport); 346a69aef14SFred Isaman extern void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data); 3477c513058SBryan Schumaker extern int _nfs4_call_sync(struct rpc_clnt *clnt, 3487c513058SBryan Schumaker struct nfs_server *server, 349cccef3b9SAndy Adamson struct rpc_message *msg, 350cccef3b9SAndy Adamson struct nfs4_sequence_args *args, 351cccef3b9SAndy Adamson struct nfs4_sequence_res *res, 352cccef3b9SAndy Adamson int cache_reply); 3537c513058SBryan Schumaker extern int _nfs4_call_sync_session(struct rpc_clnt *clnt, 3547c513058SBryan Schumaker struct nfs_server *server, 355cccef3b9SAndy Adamson struct rpc_message *msg, 356cccef3b9SAndy Adamson struct nfs4_sequence_args *args, 357cccef3b9SAndy Adamson struct nfs4_sequence_res *res, 358cccef3b9SAndy Adamson int cache_reply); 359cccef3b9SAndy Adamson 360557134a3SAndy Adamson /* 361f7b422b1SDavid Howells * Determine the device name as a string 362f7b422b1SDavid Howells */ 363b514f872SAl Viro static inline char *nfs_devname(struct dentry *dentry, 364f7b422b1SDavid Howells char *buffer, ssize_t buflen) 365f7b422b1SDavid Howells { 366b514f872SAl Viro char *dummy; 367b514f872SAl Viro return nfs_path(&dummy, dentry, buffer, buflen); 368f7b422b1SDavid Howells } 369f7b422b1SDavid Howells 370f7b422b1SDavid Howells /* 371f7b422b1SDavid Howells * Determine the actual block size (and log2 thereof) 372f7b422b1SDavid Howells */ 373f7b422b1SDavid Howells static inline 374f7b422b1SDavid Howells unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) 375f7b422b1SDavid Howells { 376f7b422b1SDavid Howells /* make sure blocksize is a power of two */ 377f7b422b1SDavid Howells if ((bsize & (bsize - 1)) || nrbitsp) { 378f7b422b1SDavid Howells unsigned char nrbits; 379f7b422b1SDavid Howells 380f7b422b1SDavid Howells for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) 381f7b422b1SDavid Howells ; 382f7b422b1SDavid Howells bsize = 1 << nrbits; 383f7b422b1SDavid Howells if (nrbitsp) 384f7b422b1SDavid Howells *nrbitsp = nrbits; 385f7b422b1SDavid Howells } 386f7b422b1SDavid Howells 387f7b422b1SDavid Howells return bsize; 388f7b422b1SDavid Howells } 389f7b422b1SDavid Howells 390f7b422b1SDavid Howells /* 391f7b422b1SDavid Howells * Calculate the number of 512byte blocks used. 392f7b422b1SDavid Howells */ 3939eaa67c6SChuck Lever static inline blkcnt_t nfs_calc_block_size(u64 tsize) 394f7b422b1SDavid Howells { 3959eaa67c6SChuck Lever blkcnt_t used = (tsize + 511) >> 9; 396f7b422b1SDavid Howells return (used > ULONG_MAX) ? ULONG_MAX : used; 397f7b422b1SDavid Howells } 398f7b422b1SDavid Howells 399f7b422b1SDavid Howells /* 400f7b422b1SDavid Howells * Compute and set NFS server blocksize 401f7b422b1SDavid Howells */ 402f7b422b1SDavid Howells static inline 403f7b422b1SDavid Howells unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) 404f7b422b1SDavid Howells { 405f7b422b1SDavid Howells if (bsize < NFS_MIN_FILE_IO_SIZE) 406f7b422b1SDavid Howells bsize = NFS_DEF_FILE_IO_SIZE; 407f7b422b1SDavid Howells else if (bsize >= NFS_MAX_FILE_IO_SIZE) 408f7b422b1SDavid Howells bsize = NFS_MAX_FILE_IO_SIZE; 409f7b422b1SDavid Howells 410f7b422b1SDavid Howells return nfs_block_bits(bsize, nrbitsp); 411f7b422b1SDavid Howells } 412f7b422b1SDavid Howells 413f7b422b1SDavid Howells /* 414f7b422b1SDavid Howells * Determine the maximum file size for a superblock 415f7b422b1SDavid Howells */ 416f7b422b1SDavid Howells static inline 417f7b422b1SDavid Howells void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) 418f7b422b1SDavid Howells { 419f7b422b1SDavid Howells sb->s_maxbytes = (loff_t)maxfilesize; 420f7b422b1SDavid Howells if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) 421f7b422b1SDavid Howells sb->s_maxbytes = MAX_LFS_FILESIZE; 422f7b422b1SDavid Howells } 42349a70f27STrond Myklebust 42449a70f27STrond Myklebust /* 42549a70f27STrond Myklebust * Determine the number of bytes of data the page contains 42649a70f27STrond Myklebust */ 42749a70f27STrond Myklebust static inline 42849a70f27STrond Myklebust unsigned int nfs_page_length(struct page *page) 42949a70f27STrond Myklebust { 43049a70f27STrond Myklebust loff_t i_size = i_size_read(page->mapping->host); 43149a70f27STrond Myklebust 43249a70f27STrond Myklebust if (i_size > 0) { 43349a70f27STrond Myklebust pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; 43449a70f27STrond Myklebust if (page->index < end_index) 43549a70f27STrond Myklebust return PAGE_CACHE_SIZE; 43649a70f27STrond Myklebust if (page->index == end_index) 43749a70f27STrond Myklebust return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1; 43849a70f27STrond Myklebust } 43949a70f27STrond Myklebust return 0; 44049a70f27STrond Myklebust } 4418d5658c9STrond Myklebust 4428d5658c9STrond Myklebust /* 4430b26a0bfSTrond Myklebust * Convert a umode to a dirent->d_type 4440b26a0bfSTrond Myklebust */ 4450b26a0bfSTrond Myklebust static inline 4460b26a0bfSTrond Myklebust unsigned char nfs_umode_to_dtype(umode_t mode) 4470b26a0bfSTrond Myklebust { 4480b26a0bfSTrond Myklebust return (mode >> 12) & 15; 4490b26a0bfSTrond Myklebust } 4500b26a0bfSTrond Myklebust 4510b26a0bfSTrond Myklebust /* 4528d5658c9STrond Myklebust * Determine the number of pages in an array of length 'len' and 4538d5658c9STrond Myklebust * with a base offset of 'base' 4548d5658c9STrond Myklebust */ 4558d5658c9STrond Myklebust static inline 4568d5658c9STrond Myklebust unsigned int nfs_page_array_len(unsigned int base, size_t len) 4578d5658c9STrond Myklebust { 4588d5658c9STrond Myklebust return ((unsigned long)len + (unsigned long)base + 4598d5658c9STrond Myklebust PAGE_SIZE - 1) >> PAGE_SHIFT; 4608d5658c9STrond Myklebust } 4610110ee15STrond Myklebust 462