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18032ca062
Implement labeled NFS on the server: encoding and decoding, and writing and reading, of file labels. Enabled with CONFIG_NFSD_V4_SECURITY_LABEL. Signed-off-by: Matthew N. Dodd <Matthew.Dodd@sparta.com> Signed-off-by: Miguel Rodel Felipe <Rodel_FM@dsi.a-star.edu.sg> Signed-off-by: Phua Eu Gene <PHUA_Eu_Gene@dsi.a-star.edu.sg> Signed-off-by: Khin Mi Mi Aung <Mi_Mi_AUNG@dsi.a-star.edu.sg> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
402 lines
16 KiB
C
402 lines
16 KiB
C
/*
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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/mount.h>
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#include <linux/nfs.h>
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#include <linux/nfs2.h>
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#include <linux/nfs3.h>
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#include <linux/nfs4.h>
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#include <linux/sunrpc/msg_prot.h>
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#include <linux/nfsd/debug.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 2
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/*
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* Maximum blocksizes supported by daemon under various circumstances.
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*/
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#define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD
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/* NFSv2 is limited by the protocol specification, see RFC 1094 */
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#define NFSSVC_MAXBLKSIZE_V2 (8*1024)
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/*
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* Largest number of bytes we need to allocate for an NFS
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* call or reply. Used to control buffer sizes. We use
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* the length of v3 WRITE, READDIR and READDIR replies
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* which are an RPC header, up to 26 XDR units of reply
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* data, and some page data.
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*
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* Note that accuracy here doesn't matter too much as the
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* size is rounded up to a page size when allocating space.
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*/
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#define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
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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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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 u32 nfsd_supported_minorversion;
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extern struct mutex nfsd_mutex;
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extern spinlock_t nfsd_drc_lock;
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extern unsigned long nfsd_drc_max_mem;
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extern unsigned long nfsd_drc_mem_used;
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extern const 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(int nrservs, struct net *net);
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int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
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int nfsd_nrthreads(struct net *);
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int nfsd_nrpools(struct net *);
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int nfsd_get_nrthreads(int n, int *, struct net *);
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int nfsd_set_nrthreads(int n, int *, struct net *);
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int nfsd_pool_stats_open(struct inode *, struct file *);
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int nfsd_pool_stats_release(struct inode *, struct file *);
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void nfsd_destroy(struct net *net);
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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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#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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int nfsd_minorversion(u32 minorversion, enum vers_op change);
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void nfsd_reset_versions(void);
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int nfsd_create_serv(struct net *net);
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extern int nfsd_max_blksize;
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static inline int nfsd_v4client(struct svc_rqst *rq)
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{
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return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
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}
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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 long max_delegations;
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void nfs4_state_init(void);
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int nfsd4_init_slabs(void);
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void nfsd4_free_slabs(void);
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int nfs4_state_start(void);
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int nfs4_state_start_net(struct net *net);
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void nfs4_state_shutdown(void);
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void nfs4_state_shutdown_net(struct net *net);
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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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char * nfs4_recoverydir(void);
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#else
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static inline void nfs4_state_init(void) { }
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static inline int nfsd4_init_slabs(void) { return 0; }
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static inline void nfsd4_free_slabs(void) { }
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static inline int nfs4_state_start(void) { return 0; }
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static inline int nfs4_state_start_net(struct net *net) { return 0; }
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static inline void nfs4_state_shutdown(void) { }
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static inline void nfs4_state_shutdown_net(struct net *net) { }
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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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static inline char * nfs4_recoverydir(void) {return NULL; }
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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 cpu_to_be32(NFS_OK)
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#define nfserr_perm cpu_to_be32(NFSERR_PERM)
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#define nfserr_noent cpu_to_be32(NFSERR_NOENT)
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#define nfserr_io cpu_to_be32(NFSERR_IO)
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#define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
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#define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
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#define nfserr_acces cpu_to_be32(NFSERR_ACCES)
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#define nfserr_exist cpu_to_be32(NFSERR_EXIST)
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#define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
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#define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
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#define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
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#define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
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#define nfserr_inval cpu_to_be32(NFSERR_INVAL)
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#define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
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#define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
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#define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
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#define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
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#define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
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#define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
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#define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
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#define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
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#define nfserr_stale cpu_to_be32(NFSERR_STALE)
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#define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
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#define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
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#define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
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#define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
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#define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
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#define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
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#define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
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#define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
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#define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
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#define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
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#define nfserr_denied cpu_to_be32(NFSERR_DENIED)
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#define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
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#define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
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#define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
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#define nfserr_same cpu_to_be32(NFSERR_SAME)
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#define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
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#define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
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#define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
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#define nfserr_moved cpu_to_be32(NFSERR_MOVED)
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#define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
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#define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
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#define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
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#define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
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#define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
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#define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
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#define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
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#define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
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#define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
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#define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
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#define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
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#define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
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#define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
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#define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
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#define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
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#define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
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#define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
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#define nfserr_grace cpu_to_be32(NFSERR_GRACE)
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#define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
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#define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
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#define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
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#define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
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#define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
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#define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
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#define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
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#define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
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#define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
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#define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
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#define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
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#define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
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#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
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#define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
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#define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
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#define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
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#define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
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#define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
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#define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
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#define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
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#define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
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#define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
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#define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
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#define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
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#define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
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#define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
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#define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
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#define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
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#define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
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#define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
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#define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
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#define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
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#define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
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#define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
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#define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
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#define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
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#define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
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#define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
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#define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
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#define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
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#define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
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#define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
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#define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
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#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
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#define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
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#define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
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#define nfserr_metadata_notsupp cpu_to_be32(NFS4ERR_METADATA_NOTSUPP)
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#define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
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#define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
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#define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
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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 cpu_to_be32(30000)
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/* end-of-file indicator in readdir */
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#define nfserr_eof cpu_to_be32(30001)
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/* replay detected */
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#define nfserr_replay_me cpu_to_be32(11001)
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/* nfs41 replay detected */
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#define nfserr_replay_cache cpu_to_be32(11002)
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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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#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_LAUNDROMAT_MINTIMEOUT 1 /* 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 NFSD4_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 NFSD4_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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#define NFSD4_SUPPORTED_ATTRS_WORD2 0
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#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
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NFSD4_SUPPORTED_ATTRS_WORD0
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#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
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NFSD4_SUPPORTED_ATTRS_WORD1
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#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
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(NFSD4_SUPPORTED_ATTRS_WORD2 | FATTR4_WORD2_SUPPATTR_EXCLCREAT)
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#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
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#define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
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(NFSD4_1_SUPPORTED_ATTRS_WORD2 | FATTR4_WORD2_SECURITY_LABEL)
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#else
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#define NFSD4_2_SUPPORTED_ATTRS_WORD2 0
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#endif
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static inline u32 nfsd_suppattrs0(u32 minorversion)
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{
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return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD0
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: NFSD4_SUPPORTED_ATTRS_WORD0;
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}
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static inline u32 nfsd_suppattrs1(u32 minorversion)
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{
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return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD1
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: NFSD4_SUPPORTED_ATTRS_WORD1;
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}
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static inline u32 nfsd_suppattrs2(u32 minorversion)
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{
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switch (minorversion) {
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default: return NFSD4_2_SUPPORTED_ATTRS_WORD2;
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case 1: return NFSD4_1_SUPPORTED_ATTRS_WORD2;
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case 0: return NFSD4_SUPPORTED_ATTRS_WORD2;
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}
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}
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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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#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
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#define NFSD_WRITEABLE_ATTRS_WORD2 FATTR4_WORD2_SECURITY_LABEL
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#else
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#define NFSD_WRITEABLE_ATTRS_WORD2 0
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#endif
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#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
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NFSD_WRITEABLE_ATTRS_WORD0
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/*
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* we currently store the exclusive create verifier in the v_{a,m}time
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* attributes so the client can't set these at create time using EXCLUSIVE4_1
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*/
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#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
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(NFSD_WRITEABLE_ATTRS_WORD1 & \
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~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
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#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
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NFSD_WRITEABLE_ATTRS_WORD2
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extern int nfsd4_is_junction(struct dentry *dentry);
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extern int register_cld_notifier(void);
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extern void unregister_cld_notifier(void);
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#else /* CONFIG_NFSD_V4 */
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static inline int nfsd4_is_junction(struct dentry *dentry)
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{
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return 0;
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}
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#define register_cld_notifier() 0
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#define unregister_cld_notifier() do { } while(0)
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#endif /* CONFIG_NFSD_V4 */
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#endif /* LINUX_NFSD_NFSD_H */
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