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/* * linux/include/linux/nfsd/nfsd.h * * Hodge-podge collection of knfsd-related stuff. * I will sort this out later. * * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> */ #ifndef LINUX_NFSD_NFSD_H #define LINUX_NFSD_NFSD_H #include <linux/config.h> #include <linux/types.h> #include <linux/unistd.h> #include <linux/dirent.h> #include <linux/fs.h> #include <linux/posix_acl.h> #include <linux/mount.h> #include <linux/nfsd/debug.h> #include <linux/nfsd/nfsfh.h> #include <linux/nfsd/export.h> #include <linux/nfsd/auth.h> #include <linux/nfsd/stats.h> #include <linux/nfsd/interface.h> /* * nfsd version */ #define NFSD_VERSION "0.5" #define NFSD_SUPPORTED_MINOR_VERSION 0 #ifdef __KERNEL__ /* * Special flags for nfsd_permission. These must be different from MAY_READ, * MAY_WRITE, and MAY_EXEC. */ #define MAY_NOP 0 #define MAY_SATTR 8 #define MAY_TRUNC 16 #define MAY_LOCK 32 #define MAY_OWNER_OVERRIDE 64 #define MAY_LOCAL_ACCESS 128 /* IRIX doing local access check on device special file*/ #if (MAY_SATTR | MAY_TRUNC | MAY_LOCK | MAY_OWNER_OVERRIDE | MAY_LOCAL_ACCESS) & (MAY_READ | MAY_WRITE | MAY_EXEC) # error "please use a different value for MAY_SATTR or MAY_TRUNC or MAY_LOCK or MAY_LOCAL_ACCESS or MAY_OWNER_OVERRIDE." #endif #define MAY_CREATE (MAY_EXEC|MAY_WRITE) #define MAY_REMOVE (MAY_EXEC|MAY_WRITE|MAY_TRUNC) /* * Callback function for readdir */ struct readdir_cd { int err; /* 0, nfserr, or nfserr_eof */ }; typedef int (*encode_dent_fn)(struct readdir_cd *, const char *, int, loff_t, ino_t, unsigned int); typedef int (*nfsd_dirop_t)(struct inode *, struct dentry *, int, int); extern struct svc_program nfsd_program; extern struct svc_version nfsd_version2, nfsd_version3, nfsd_version4; extern struct svc_serv *nfsd_serv; /* * Function prototypes. */ int nfsd_svc(unsigned short port, int nrservs); int nfsd_dispatch(struct svc_rqst *rqstp, u32 *statp); /* nfsd/vfs.c */ int fh_lock_parent(struct svc_fh *, struct dentry *); int nfsd_racache_init(int); void nfsd_racache_shutdown(void); int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp, struct svc_export **expp); int nfsd_lookup(struct svc_rqst *, struct svc_fh *, const char *, int, struct svc_fh *); int nfsd_setattr(struct svc_rqst *, struct svc_fh *, struct iattr *, int, time_t); #ifdef CONFIG_NFSD_V4 int nfsd4_set_nfs4_acl(struct svc_rqst *, struct svc_fh *, struct nfs4_acl *); int nfsd4_get_nfs4_acl(struct svc_rqst *, struct dentry *, struct nfs4_acl **); #endif /* CONFIG_NFSD_V4 */ int nfsd_create(struct svc_rqst *, struct svc_fh *, char *name, int len, struct iattr *attrs, int type, dev_t rdev, struct svc_fh *res); #ifdef CONFIG_NFSD_V3 int nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *); int nfsd_create_v3(struct svc_rqst *, struct svc_fh *, char *name, int len, struct iattr *attrs, struct svc_fh *res, int createmode, u32 *verifier, int *truncp); int nfsd_commit(struct svc_rqst *, struct svc_fh *, loff_t, unsigned long); #endif /* CONFIG_NFSD_V3 */ int nfsd_open(struct svc_rqst *, struct svc_fh *, int, int, struct file **); void nfsd_close(struct file *); int nfsd_read(struct svc_rqst *, struct svc_fh *, struct file *, loff_t, struct kvec *, int, unsigned long *); int nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *, loff_t, struct kvec *,int, unsigned long, int *); int nfsd_readlink(struct svc_rqst *, struct svc_fh *, char *, int *); int nfsd_symlink(struct svc_rqst *, struct svc_fh *, char *name, int len, char *path, int plen, struct svc_fh *res, struct iattr *); int nfsd_link(struct svc_rqst *, struct svc_fh *, char *, int, struct svc_fh *); int nfsd_rename(struct svc_rqst *, struct svc_fh *, char *, int, struct svc_fh *, char *, int); int nfsd_remove(struct svc_rqst *, struct svc_fh *, char *, int); int nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type, char *name, int len); int nfsd_truncate(struct svc_rqst *, struct svc_fh *, unsigned long size); int nfsd_readdir(struct svc_rqst *, struct svc_fh *, loff_t *, struct readdir_cd *, encode_dent_fn); int nfsd_statfs(struct svc_rqst *, struct svc_fh *, struct kstatfs *); int nfsd_notify_change(struct inode *, struct iattr *); int nfsd_permission(struct svc_export *, struct dentry *, int); int nfsd_sync_dir(struct dentry *dp); #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) #ifdef CONFIG_NFSD_V2_ACL extern struct svc_version nfsd_acl_version2; #else #define nfsd_acl_version2 NULL #endif #ifdef CONFIG_NFSD_V3_ACL extern struct svc_version nfsd_acl_version3; #else #define nfsd_acl_version3 NULL #endif struct posix_acl *nfsd_get_posix_acl(struct svc_fh *, int); int nfsd_set_posix_acl(struct svc_fh *, int, struct posix_acl *); #endif /* * NFSv4 State */ #ifdef CONFIG_NFSD_V4 void nfs4_state_init(void); int nfs4_state_start(void); void nfs4_state_shutdown(void); time_t nfs4_lease_time(void); void nfs4_reset_lease(time_t leasetime); int nfs4_reset_recoverydir(char *recdir); #else static inline void nfs4_state_init(void){}; static inline int nfs4_state_start(void){return 0;} static inline void nfs4_state_shutdown(void){} static inline time_t nfs4_lease_time(void){return 0;} static inline void nfs4_reset_lease(time_t leasetime){} static inline int nfs4_reset_recoverydir(char *recdir) {return 0;} #endif /* * lockd binding */ void nfsd_lockd_init(void); void nfsd_lockd_shutdown(void); /* * These macros provide pre-xdr'ed values for faster operation. */ #define nfs_ok __constant_htonl(NFS_OK) #define nfserr_perm __constant_htonl(NFSERR_PERM) #define nfserr_noent __constant_htonl(NFSERR_NOENT) #define nfserr_io __constant_htonl(NFSERR_IO) #define nfserr_nxio __constant_htonl(NFSERR_NXIO) #define nfserr_eagain __constant_htonl(NFSERR_EAGAIN) #define nfserr_acces __constant_htonl(NFSERR_ACCES) #define nfserr_exist __constant_htonl(NFSERR_EXIST) #define nfserr_xdev __constant_htonl(NFSERR_XDEV) #define nfserr_nodev __constant_htonl(NFSERR_NODEV) #define nfserr_notdir __constant_htonl(NFSERR_NOTDIR) #define nfserr_isdir __constant_htonl(NFSERR_ISDIR) #define nfserr_inval __constant_htonl(NFSERR_INVAL) #define nfserr_fbig __constant_htonl(NFSERR_FBIG) #define nfserr_nospc __constant_htonl(NFSERR_NOSPC) #define nfserr_rofs __constant_htonl(NFSERR_ROFS) #define nfserr_mlink __constant_htonl(NFSERR_MLINK) #define nfserr_opnotsupp __constant_htonl(NFSERR_OPNOTSUPP) #define nfserr_nametoolong __constant_htonl(NFSERR_NAMETOOLONG) #define nfserr_notempty __constant_htonl(NFSERR_NOTEMPTY) #define nfserr_dquot __constant_htonl(NFSERR_DQUOT) #define nfserr_stale __constant_htonl(NFSERR_STALE) #define nfserr_remote __constant_htonl(NFSERR_REMOTE) #define nfserr_wflush __constant_htonl(NFSERR_WFLUSH) #define nfserr_badhandle __constant_htonl(NFSERR_BADHANDLE) #define nfserr_notsync __constant_htonl(NFSERR_NOT_SYNC) #define nfserr_badcookie __constant_htonl(NFSERR_BAD_COOKIE) #define nfserr_notsupp __constant_htonl(NFSERR_NOTSUPP) #define nfserr_toosmall __constant_htonl(NFSERR_TOOSMALL) #define nfserr_serverfault __constant_htonl(NFSERR_SERVERFAULT) #define nfserr_badtype __constant_htonl(NFSERR_BADTYPE) #define nfserr_jukebox __constant_htonl(NFSERR_JUKEBOX) #define nfserr_denied __constant_htonl(NFSERR_DENIED) #define nfserr_deadlock __constant_htonl(NFSERR_DEADLOCK) #define nfserr_expired __constant_htonl(NFSERR_EXPIRED) #define nfserr_bad_cookie __constant_htonl(NFSERR_BAD_COOKIE) #define nfserr_same __constant_htonl(NFSERR_SAME) #define nfserr_clid_inuse __constant_htonl(NFSERR_CLID_INUSE) #define nfserr_stale_clientid __constant_htonl(NFSERR_STALE_CLIENTID) #define nfserr_resource __constant_htonl(NFSERR_RESOURCE) #define nfserr_nofilehandle __constant_htonl(NFSERR_NOFILEHANDLE) #define nfserr_minor_vers_mismatch __constant_htonl(NFSERR_MINOR_VERS_MISMATCH) #define nfserr_share_denied __constant_htonl(NFSERR_SHARE_DENIED) #define nfserr_stale_stateid __constant_htonl(NFSERR_STALE_STATEID) #define nfserr_old_stateid __constant_htonl(NFSERR_OLD_STATEID) #define nfserr_bad_stateid __constant_htonl(NFSERR_BAD_STATEID) #define nfserr_bad_seqid __constant_htonl(NFSERR_BAD_SEQID) #define nfserr_symlink __constant_htonl(NFSERR_SYMLINK) #define nfserr_not_same __constant_htonl(NFSERR_NOT_SAME) #define nfserr_restorefh __constant_htonl(NFSERR_RESTOREFH) #define nfserr_attrnotsupp __constant_htonl(NFSERR_ATTRNOTSUPP) #define nfserr_bad_xdr __constant_htonl(NFSERR_BAD_XDR) #define nfserr_openmode __constant_htonl(NFSERR_OPENMODE) #define nfserr_locks_held __constant_htonl(NFSERR_LOCKS_HELD) #define nfserr_op_illegal __constant_htonl(NFSERR_OP_ILLEGAL) #define nfserr_grace __constant_htonl(NFSERR_GRACE) #define nfserr_no_grace __constant_htonl(NFSERR_NO_GRACE) #define nfserr_reclaim_bad __constant_htonl(NFSERR_RECLAIM_BAD) #define nfserr_badname __constant_htonl(NFSERR_BADNAME) #define nfserr_cb_path_down __constant_htonl(NFSERR_CB_PATH_DOWN) #define nfserr_locked __constant_htonl(NFSERR_LOCKED) /* error codes for internal use */ /* if a request fails due to kmalloc failure, it gets dropped. * Client should resend eventually */ #define nfserr_dropit __constant_htonl(30000) /* end-of-file indicator in readdir */ #define nfserr_eof __constant_htonl(30001) /* Check for dir entries '.' and '..' */ #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.')) /* * Time of server startup */ extern struct timeval nfssvc_boot; static inline int is_fsid(struct svc_fh *fh, struct knfsd_fh *reffh) { if (fh->fh_export->ex_flags & NFSEXP_FSID) { struct vfsmount *mnt = fh->fh_export->ex_mnt; if (!old_valid_dev(mnt->mnt_sb->s_dev) || (reffh->fh_version == 1 && reffh->fh_fsid_type == 1)) return 1; } return 0; } #ifdef CONFIG_NFSD_V4 /* before processing a COMPOUND operation, we have to check that there * is enough space in the buffer for XDR encode to succeed. otherwise, * we might process an operation with side effects, and be unable to * tell the client that the operation succeeded. * * COMPOUND_SLACK_SPACE - this is the minimum amount of buffer space * needed to encode an "ordinary" _successful_ operation. (GETATTR, * READ, READDIR, and READLINK have their own buffer checks.) if we * fall below this level, we fail the next operation with NFS4ERR_RESOURCE. * * COMPOUND_ERR_SLACK_SPACE - this is the minimum amount of buffer space * needed to encode an operation which has failed with NFS4ERR_RESOURCE. * care is taken to ensure that we never fall below this level for any * reason. */ #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */ #define COMPOUND_ERR_SLACK_SPACE 12 /* OP_SETATTR */ #define NFSD_LEASE_TIME (nfs4_lease_time()) #define NFSD_LAUNDROMAT_MINTIMEOUT 10 /* seconds */ /* * The following attributes are currently not supported by the NFSv4 server: * ARCHIVE (deprecated anyway) * FS_LOCATIONS (will be supported eventually) * HIDDEN (unlikely to be supported any time soon) * MIMETYPE (unlikely to be supported any time soon) * QUOTA_* (will be supported in a forthcoming patch) * SYSTEM (unlikely to be supported any time soon) * TIME_BACKUP (unlikely to be supported any time soon) * TIME_CREATE (unlikely to be supported any time soon) */ #define NFSD_SUPPORTED_ATTRS_WORD0 \ (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \ | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \ | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \ | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \ | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \ | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \ | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \ | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_HOMOGENEOUS \ | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \ | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL) #define NFSD_SUPPORTED_ATTRS_WORD1 \ (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \ | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \ | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \ | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \ | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \ | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID) /* These will return ERR_INVAL if specified in GETATTR or READDIR. */ #define NFSD_WRITEONLY_ATTRS_WORD1 \ (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) /* These are the only attrs allowed in CREATE/OPEN/SETATTR. */ #define NFSD_WRITEABLE_ATTRS_WORD0 \ (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL ) #define NFSD_WRITEABLE_ATTRS_WORD1 \ (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \ | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_MODIFY_SET) #endif /* CONFIG_NFSD_V4 */ #endif /* __KERNEL__ */ #endif /* LINUX_NFSD_NFSD_H */