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android_kernel_motorola_sm6225/include/linux/nfsd/nfsd.h
YAMAMOTO Takashi f193fbab2e [PATCH] nfsd: check error status from nfsd_sync_dir 
Change nfsd_sync_dir to return an error if ->sync fails, and pass that error
up through the stack.  This involves a number of rearrangements of error
paths, and care to distinguish between Linux -errno numbers and NFSERR
numbers.

In the 'create' routines, we continue with the 'setattr' even if a previous
sync_dir failed.

This patch is quite different from Takashi's in a few ways, but there is still
a strong lineage.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-18 19:20:24 -08:00

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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 */
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