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Diffstat (limited to 'include/linux/nfsd/nfsd.h')
| -rw-r--r-- | include/linux/nfsd/nfsd.h | 311 |
1 files changed, 311 insertions, 0 deletions
diff --git a/include/linux/nfsd/nfsd.h b/include/linux/nfsd/nfsd.h new file mode 100644 index 000000000000..8f85d9a59607 --- /dev/null +++ b/include/linux/nfsd/nfsd.h @@ -0,0 +1,311 @@ +/* + * 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/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; + +/* + * 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); + + +/* + * NFSv4 State + */ +#ifdef CONFIG_NFSD_V4 +int nfs4_state_init(void); +void nfs4_state_shutdown(void); +time_t nfs4_lease_time(void); +void nfs4_reset_lease(time_t leasetime); +#else +static inline int nfs4_state_init(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){} +#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) + +/* 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 */ |