337 lines
14 KiB
C
337 lines
14 KiB
C
/*
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* linux/include/linux/nfsd/nfsd.h
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*
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* Hodge-podge collection of knfsd-related stuff.
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* I will sort this out later.
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*
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* Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
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*/
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#ifndef LINUX_NFSD_NFSD_H
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#define LINUX_NFSD_NFSD_H
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#include <linux/types.h>
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#include <linux/unistd.h>
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#include <linux/fs.h>
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#include <linux/posix_acl.h>
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#include <linux/mount.h>
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#include <linux/nfsd/debug.h>
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#include <linux/nfsd/nfsfh.h>
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#include <linux/nfsd/export.h>
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#include <linux/nfsd/stats.h>
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/*
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* nfsd version
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*/
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#define NFSD_SUPPORTED_MINOR_VERSION 0
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/*
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* Flags for nfsd_permission
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*/
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#define NFSD_MAY_NOP 0
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#define NFSD_MAY_EXEC 1 /* == MAY_EXEC */
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#define NFSD_MAY_WRITE 2 /* == MAY_WRITE */
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#define NFSD_MAY_READ 4 /* == MAY_READ */
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#define NFSD_MAY_SATTR 8
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#define NFSD_MAY_TRUNC 16
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#define NFSD_MAY_LOCK 32
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#define NFSD_MAY_OWNER_OVERRIDE 64
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#define NFSD_MAY_LOCAL_ACCESS 128 /* IRIX doing local access check on device special file*/
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#define NFSD_MAY_BYPASS_GSS_ON_ROOT 256
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#define NFSD_MAY_CREATE (NFSD_MAY_EXEC|NFSD_MAY_WRITE)
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#define NFSD_MAY_REMOVE (NFSD_MAY_EXEC|NFSD_MAY_WRITE|NFSD_MAY_TRUNC)
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/*
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* Callback function for readdir
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*/
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struct readdir_cd {
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__be32 err; /* 0, nfserr, or nfserr_eof */
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};
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typedef int (*nfsd_dirop_t)(struct inode *, struct dentry *, int, int);
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extern struct svc_program nfsd_program;
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extern struct svc_version nfsd_version2, nfsd_version3,
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nfsd_version4;
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extern struct mutex nfsd_mutex;
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extern struct svc_serv *nfsd_serv;
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extern struct seq_operations nfs_exports_op;
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/*
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* Function prototypes.
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*/
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int nfsd_svc(unsigned short port, int nrservs);
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int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
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int nfsd_nrthreads(void);
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int nfsd_nrpools(void);
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int nfsd_get_nrthreads(int n, int *);
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int nfsd_set_nrthreads(int n, int *);
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/* nfsd/vfs.c */
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int fh_lock_parent(struct svc_fh *, struct dentry *);
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int nfsd_racache_init(int);
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void nfsd_racache_shutdown(void);
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int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
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struct svc_export **expp);
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__be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *,
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const char *, unsigned int, struct svc_fh *);
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__be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *,
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const char *, unsigned int,
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struct svc_export **, struct dentry **);
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__be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *,
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struct iattr *, int, time_t);
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#ifdef CONFIG_NFSD_V4
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__be32 nfsd4_set_nfs4_acl(struct svc_rqst *, struct svc_fh *,
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struct nfs4_acl *);
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int nfsd4_get_nfs4_acl(struct svc_rqst *, struct dentry *, struct nfs4_acl **);
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#endif /* CONFIG_NFSD_V4 */
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__be32 nfsd_create(struct svc_rqst *, struct svc_fh *,
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char *name, int len, struct iattr *attrs,
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int type, dev_t rdev, struct svc_fh *res);
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#ifdef CONFIG_NFSD_V3
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__be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);
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__be32 nfsd_create_v3(struct svc_rqst *, struct svc_fh *,
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char *name, int len, struct iattr *attrs,
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struct svc_fh *res, int createmode,
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u32 *verifier, int *truncp, int *created);
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__be32 nfsd_commit(struct svc_rqst *, struct svc_fh *,
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loff_t, unsigned long);
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#endif /* CONFIG_NFSD_V3 */
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__be32 nfsd_open(struct svc_rqst *, struct svc_fh *, int,
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int, struct file **);
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void nfsd_close(struct file *);
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__be32 nfsd_read(struct svc_rqst *, struct svc_fh *, struct file *,
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loff_t, struct kvec *, int, unsigned long *);
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__be32 nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *,
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loff_t, struct kvec *,int, unsigned long, int *);
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__be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *,
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char *, int *);
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__be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *,
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char *name, int len, char *path, int plen,
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struct svc_fh *res, struct iattr *);
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__be32 nfsd_link(struct svc_rqst *, struct svc_fh *,
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char *, int, struct svc_fh *);
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__be32 nfsd_rename(struct svc_rqst *,
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struct svc_fh *, char *, int,
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struct svc_fh *, char *, int);
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__be32 nfsd_remove(struct svc_rqst *,
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struct svc_fh *, char *, int);
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__be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,
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char *name, int len);
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int nfsd_truncate(struct svc_rqst *, struct svc_fh *,
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unsigned long size);
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__be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *,
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loff_t *, struct readdir_cd *, filldir_t);
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__be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *,
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struct kstatfs *, int access);
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int nfsd_notify_change(struct inode *, struct iattr *);
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__be32 nfsd_permission(struct svc_rqst *, struct svc_export *,
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struct dentry *, int);
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int nfsd_sync_dir(struct dentry *dp);
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#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
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#ifdef CONFIG_NFSD_V2_ACL
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extern struct svc_version nfsd_acl_version2;
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#else
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#define nfsd_acl_version2 NULL
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#endif
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#ifdef CONFIG_NFSD_V3_ACL
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extern struct svc_version nfsd_acl_version3;
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#else
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#define nfsd_acl_version3 NULL
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#endif
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struct posix_acl *nfsd_get_posix_acl(struct svc_fh *, int);
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int nfsd_set_posix_acl(struct svc_fh *, int, struct posix_acl *);
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#endif
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enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
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int nfsd_vers(int vers, enum vers_op change);
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void nfsd_reset_versions(void);
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int nfsd_create_serv(void);
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extern int nfsd_max_blksize;
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/*
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* NFSv4 State
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*/
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#ifdef CONFIG_NFSD_V4
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extern unsigned int max_delegations;
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int nfs4_state_init(void);
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void nfsd4_free_slabs(void);
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void nfs4_state_start(void);
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void nfs4_state_shutdown(void);
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time_t nfs4_lease_time(void);
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void nfs4_reset_lease(time_t leasetime);
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int nfs4_reset_recoverydir(char *recdir);
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#else
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static inline int nfs4_state_init(void) { return 0; }
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static inline void nfsd4_free_slabs(void) { }
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static inline void nfs4_state_start(void) { }
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static inline void nfs4_state_shutdown(void) { }
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static inline time_t nfs4_lease_time(void) { return 0; }
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static inline void nfs4_reset_lease(time_t leasetime) { }
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static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
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#endif
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/*
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* lockd binding
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*/
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void nfsd_lockd_init(void);
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void nfsd_lockd_shutdown(void);
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/*
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* These macros provide pre-xdr'ed values for faster operation.
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*/
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#define nfs_ok __constant_htonl(NFS_OK)
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#define nfserr_perm __constant_htonl(NFSERR_PERM)
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#define nfserr_noent __constant_htonl(NFSERR_NOENT)
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#define nfserr_io __constant_htonl(NFSERR_IO)
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#define nfserr_nxio __constant_htonl(NFSERR_NXIO)
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#define nfserr_eagain __constant_htonl(NFSERR_EAGAIN)
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#define nfserr_acces __constant_htonl(NFSERR_ACCES)
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#define nfserr_exist __constant_htonl(NFSERR_EXIST)
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#define nfserr_xdev __constant_htonl(NFSERR_XDEV)
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#define nfserr_nodev __constant_htonl(NFSERR_NODEV)
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#define nfserr_notdir __constant_htonl(NFSERR_NOTDIR)
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#define nfserr_isdir __constant_htonl(NFSERR_ISDIR)
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#define nfserr_inval __constant_htonl(NFSERR_INVAL)
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#define nfserr_fbig __constant_htonl(NFSERR_FBIG)
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#define nfserr_nospc __constant_htonl(NFSERR_NOSPC)
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#define nfserr_rofs __constant_htonl(NFSERR_ROFS)
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#define nfserr_mlink __constant_htonl(NFSERR_MLINK)
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#define nfserr_opnotsupp __constant_htonl(NFSERR_OPNOTSUPP)
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#define nfserr_nametoolong __constant_htonl(NFSERR_NAMETOOLONG)
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#define nfserr_notempty __constant_htonl(NFSERR_NOTEMPTY)
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#define nfserr_dquot __constant_htonl(NFSERR_DQUOT)
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#define nfserr_stale __constant_htonl(NFSERR_STALE)
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#define nfserr_remote __constant_htonl(NFSERR_REMOTE)
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#define nfserr_wflush __constant_htonl(NFSERR_WFLUSH)
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#define nfserr_badhandle __constant_htonl(NFSERR_BADHANDLE)
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#define nfserr_notsync __constant_htonl(NFSERR_NOT_SYNC)
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#define nfserr_badcookie __constant_htonl(NFSERR_BAD_COOKIE)
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#define nfserr_notsupp __constant_htonl(NFSERR_NOTSUPP)
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#define nfserr_toosmall __constant_htonl(NFSERR_TOOSMALL)
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#define nfserr_serverfault __constant_htonl(NFSERR_SERVERFAULT)
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#define nfserr_badtype __constant_htonl(NFSERR_BADTYPE)
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#define nfserr_jukebox __constant_htonl(NFSERR_JUKEBOX)
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#define nfserr_denied __constant_htonl(NFSERR_DENIED)
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#define nfserr_deadlock __constant_htonl(NFSERR_DEADLOCK)
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#define nfserr_expired __constant_htonl(NFSERR_EXPIRED)
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#define nfserr_bad_cookie __constant_htonl(NFSERR_BAD_COOKIE)
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#define nfserr_same __constant_htonl(NFSERR_SAME)
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#define nfserr_clid_inuse __constant_htonl(NFSERR_CLID_INUSE)
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#define nfserr_stale_clientid __constant_htonl(NFSERR_STALE_CLIENTID)
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#define nfserr_resource __constant_htonl(NFSERR_RESOURCE)
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#define nfserr_moved __constant_htonl(NFSERR_MOVED)
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#define nfserr_nofilehandle __constant_htonl(NFSERR_NOFILEHANDLE)
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#define nfserr_minor_vers_mismatch __constant_htonl(NFSERR_MINOR_VERS_MISMATCH)
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#define nfserr_share_denied __constant_htonl(NFSERR_SHARE_DENIED)
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#define nfserr_stale_stateid __constant_htonl(NFSERR_STALE_STATEID)
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#define nfserr_old_stateid __constant_htonl(NFSERR_OLD_STATEID)
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#define nfserr_bad_stateid __constant_htonl(NFSERR_BAD_STATEID)
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#define nfserr_bad_seqid __constant_htonl(NFSERR_BAD_SEQID)
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#define nfserr_symlink __constant_htonl(NFSERR_SYMLINK)
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#define nfserr_not_same __constant_htonl(NFSERR_NOT_SAME)
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#define nfserr_restorefh __constant_htonl(NFSERR_RESTOREFH)
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#define nfserr_attrnotsupp __constant_htonl(NFSERR_ATTRNOTSUPP)
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#define nfserr_bad_xdr __constant_htonl(NFSERR_BAD_XDR)
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#define nfserr_openmode __constant_htonl(NFSERR_OPENMODE)
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#define nfserr_locks_held __constant_htonl(NFSERR_LOCKS_HELD)
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#define nfserr_op_illegal __constant_htonl(NFSERR_OP_ILLEGAL)
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#define nfserr_grace __constant_htonl(NFSERR_GRACE)
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#define nfserr_no_grace __constant_htonl(NFSERR_NO_GRACE)
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#define nfserr_reclaim_bad __constant_htonl(NFSERR_RECLAIM_BAD)
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#define nfserr_badname __constant_htonl(NFSERR_BADNAME)
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#define nfserr_cb_path_down __constant_htonl(NFSERR_CB_PATH_DOWN)
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#define nfserr_locked __constant_htonl(NFSERR_LOCKED)
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#define nfserr_wrongsec __constant_htonl(NFSERR_WRONGSEC)
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#define nfserr_replay_me __constant_htonl(NFSERR_REPLAY_ME)
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/* error codes for internal use */
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/* if a request fails due to kmalloc failure, it gets dropped.
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* Client should resend eventually
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*/
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#define nfserr_dropit __constant_htonl(30000)
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/* end-of-file indicator in readdir */
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#define nfserr_eof __constant_htonl(30001)
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/* Check for dir entries '.' and '..' */
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#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
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/*
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* Time of server startup
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*/
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extern struct timeval nfssvc_boot;
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#ifdef CONFIG_NFSD_V4
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/* before processing a COMPOUND operation, we have to check that there
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* is enough space in the buffer for XDR encode to succeed. otherwise,
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* we might process an operation with side effects, and be unable to
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* tell the client that the operation succeeded.
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*
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* COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
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* needed to encode an "ordinary" _successful_ operation. (GETATTR,
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* READ, READDIR, and READLINK have their own buffer checks.) if we
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* fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
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*
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* COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
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* needed to encode an operation which has failed with NFS4ERR_RESOURCE.
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* care is taken to ensure that we never fall below this level for any
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* reason.
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*/
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#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
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#define COMPOUND_ERR_SLACK_SPACE 12 /* OP_SETATTR */
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#define NFSD_LEASE_TIME (nfs4_lease_time())
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#define NFSD_LAUNDROMAT_MINTIMEOUT 10 /* seconds */
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/*
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* The following attributes are currently not supported by the NFSv4 server:
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* ARCHIVE (deprecated anyway)
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* HIDDEN (unlikely to be supported any time soon)
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* MIMETYPE (unlikely to be supported any time soon)
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* QUOTA_* (will be supported in a forthcoming patch)
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* SYSTEM (unlikely to be supported any time soon)
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* TIME_BACKUP (unlikely to be supported any time soon)
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* TIME_CREATE (unlikely to be supported any time soon)
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*/
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#define NFSD_SUPPORTED_ATTRS_WORD0 \
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(FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
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| FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
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| FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
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| FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
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| FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
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| FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
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| FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
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| FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
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| FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
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| FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
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#define NFSD_SUPPORTED_ATTRS_WORD1 \
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(FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
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| FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
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| FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
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| FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
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| FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \
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| FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
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/* These will return ERR_INVAL if specified in GETATTR or READDIR. */
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#define NFSD_WRITEONLY_ATTRS_WORD1 \
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(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
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/* These are the only attrs allowed in CREATE/OPEN/SETATTR. */
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#define NFSD_WRITEABLE_ATTRS_WORD0 \
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(FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL )
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#define NFSD_WRITEABLE_ATTRS_WORD1 \
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(FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
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| FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
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#endif /* CONFIG_NFSD_V4 */
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#endif /* LINUX_NFSD_NFSD_H */
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