af90f707fa
This patch changes nfs4_preprocess_stateid_op so it always returns a valid struct file if it has been asked for that. For that we now allocate a temporary struct file for special stateids, and check permissions if we got the file structure from the stateid. This ensures that all callers will get their handling of special stateids right, and avoids code duplication. There is a little wart in here because the read code needs to know if we allocated a file structure so that it can copy around the read-ahead parameters. In the long run we should probably aim to cache full file structures used with special stateids instead. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
134 lines
4.5 KiB
C
134 lines
4.5 KiB
C
/*
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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_VFS_H
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#define LINUX_NFSD_VFS_H
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#include "nfsfh.h"
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#include "nfsd.h"
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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 0x001 /* == MAY_EXEC */
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#define NFSD_MAY_WRITE 0x002 /* == MAY_WRITE */
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#define NFSD_MAY_READ 0x004 /* == MAY_READ */
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#define NFSD_MAY_SATTR 0x008
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#define NFSD_MAY_TRUNC 0x010
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#define NFSD_MAY_LOCK 0x020
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#define NFSD_MAY_MASK 0x03f
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/* extra hints to permission and open routines: */
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#define NFSD_MAY_OWNER_OVERRIDE 0x040
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#define NFSD_MAY_LOCAL_ACCESS 0x080 /* for device special files */
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#define NFSD_MAY_BYPASS_GSS_ON_ROOT 0x100
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#define NFSD_MAY_NOT_BREAK_LEASE 0x200
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#define NFSD_MAY_BYPASS_GSS 0x400
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#define NFSD_MAY_READ_IF_EXEC 0x800
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#define NFSD_MAY_64BIT_COOKIE 0x1000 /* 64 bit readdir cookies for >= NFSv3 */
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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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typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
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/* nfsd/vfs.c */
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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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int nfsd_mountpoint(struct dentry *, struct svc_export *);
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#ifdef CONFIG_NFSD_V4
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__be32 nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *,
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struct xdr_netobj *);
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__be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *,
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struct file *, loff_t, loff_t, int);
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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 do_nfsd_create(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, bool *truncp, bool *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 *, umode_t,
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int, struct file **);
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struct raparms;
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__be32 nfsd_splice_read(struct svc_rqst *,
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struct file *, loff_t, unsigned long *);
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__be32 nfsd_readv(struct file *, loff_t, struct kvec *, int,
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unsigned long *);
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__be32 nfsd_read(struct svc_rqst *, struct svc_fh *,
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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_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp,
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struct file *file, loff_t offset,
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struct kvec *vec, int vlen, unsigned long *cnt,
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int *stablep);
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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,
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struct svc_fh *res);
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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_unlink(struct svc_rqst *, struct svc_fh *, int type,
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char *name, int len);
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__be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *,
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loff_t *, struct readdir_cd *, nfsd_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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__be32 nfsd_permission(struct svc_rqst *, struct svc_export *,
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struct dentry *, int);
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struct raparms *nfsd_init_raparms(struct file *file);
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void nfsd_put_raparams(struct file *file, struct raparms *ra);
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static inline int fh_want_write(struct svc_fh *fh)
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{
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int ret = mnt_want_write(fh->fh_export->ex_path.mnt);
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if (!ret)
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fh->fh_want_write = 1;
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return ret;
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}
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static inline void fh_drop_write(struct svc_fh *fh)
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{
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if (fh->fh_want_write) {
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fh->fh_want_write = 0;
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mnt_drop_write(fh->fh_export->ex_path.mnt);
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}
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}
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static inline __be32 fh_getattr(struct svc_fh *fh, struct kstat *stat)
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{
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struct path p = {.mnt = fh->fh_export->ex_path.mnt,
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.dentry = fh->fh_dentry};
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return nfserrno(vfs_getattr(&p, stat));
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}
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#endif /* LINUX_NFSD_VFS_H */
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