1 /* 2 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> 3 */ 4 5 #ifndef LINUX_NFSD_VFS_H 6 #define LINUX_NFSD_VFS_H 7 8 #include "nfsfh.h" 9 #include "nfsd.h" 10 11 /* 12 * Flags for nfsd_permission 13 */ 14 #define NFSD_MAY_NOP 0 15 #define NFSD_MAY_EXEC 0x001 /* == MAY_EXEC */ 16 #define NFSD_MAY_WRITE 0x002 /* == MAY_WRITE */ 17 #define NFSD_MAY_READ 0x004 /* == MAY_READ */ 18 #define NFSD_MAY_SATTR 0x008 19 #define NFSD_MAY_TRUNC 0x010 20 #define NFSD_MAY_LOCK 0x020 21 #define NFSD_MAY_MASK 0x03f 22 23 /* extra hints to permission and open routines: */ 24 #define NFSD_MAY_OWNER_OVERRIDE 0x040 25 #define NFSD_MAY_LOCAL_ACCESS 0x080 /* for device special files */ 26 #define NFSD_MAY_BYPASS_GSS_ON_ROOT 0x100 27 #define NFSD_MAY_NOT_BREAK_LEASE 0x200 28 #define NFSD_MAY_BYPASS_GSS 0x400 29 #define NFSD_MAY_READ_IF_EXEC 0x800 30 31 #define NFSD_MAY_64BIT_COOKIE 0x1000 /* 64 bit readdir cookies for >= NFSv3 */ 32 33 #define NFSD_MAY_CREATE (NFSD_MAY_EXEC|NFSD_MAY_WRITE) 34 #define NFSD_MAY_REMOVE (NFSD_MAY_EXEC|NFSD_MAY_WRITE|NFSD_MAY_TRUNC) 35 36 /* 37 * Callback function for readdir 38 */ 39 typedef int (*nfsd_dirop_t)(struct inode *, struct dentry *, int, int); 40 41 /* nfsd/vfs.c */ 42 int nfsd_racache_init(int); 43 void nfsd_racache_shutdown(void); 44 int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp, 45 struct svc_export **expp); 46 __be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *, 47 const char *, unsigned int, struct svc_fh *); 48 __be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *, 49 const char *, unsigned int, 50 struct svc_export **, struct dentry **); 51 __be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *, 52 struct iattr *, int, time_t); 53 int nfsd_mountpoint(struct dentry *, struct svc_export *); 54 #ifdef CONFIG_NFSD_V4 55 __be32 nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *, 56 struct xdr_netobj *); 57 #endif /* CONFIG_NFSD_V4 */ 58 __be32 nfsd_create(struct svc_rqst *, struct svc_fh *, 59 char *name, int len, struct iattr *attrs, 60 int type, dev_t rdev, struct svc_fh *res); 61 #ifdef CONFIG_NFSD_V3 62 __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *); 63 __be32 do_nfsd_create(struct svc_rqst *, struct svc_fh *, 64 char *name, int len, struct iattr *attrs, 65 struct svc_fh *res, int createmode, 66 u32 *verifier, bool *truncp, bool *created); 67 __be32 nfsd_commit(struct svc_rqst *, struct svc_fh *, 68 loff_t, unsigned long); 69 #endif /* CONFIG_NFSD_V3 */ 70 __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t, 71 int, struct file **); 72 void nfsd_close(struct file *); 73 __be32 nfsd_read(struct svc_rqst *, struct svc_fh *, 74 loff_t, struct kvec *, int, unsigned long *); 75 __be32 nfsd_read_file(struct svc_rqst *, struct svc_fh *, struct file *, 76 loff_t, struct kvec *, int, unsigned long *); 77 __be32 nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *, 78 loff_t, struct kvec *,int, unsigned long *, int *); 79 __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *, 80 char *, int *); 81 __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *, 82 char *name, int len, char *path, int plen, 83 struct svc_fh *res, struct iattr *); 84 __be32 nfsd_link(struct svc_rqst *, struct svc_fh *, 85 char *, int, struct svc_fh *); 86 __be32 nfsd_rename(struct svc_rqst *, 87 struct svc_fh *, char *, int, 88 struct svc_fh *, char *, int); 89 __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type, 90 char *name, int len); 91 __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *, 92 loff_t *, struct readdir_cd *, filldir_t); 93 __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *, 94 struct kstatfs *, int access); 95 96 __be32 nfsd_permission(struct svc_rqst *, struct svc_export *, 97 struct dentry *, int); 98 99 static inline int fh_want_write(struct svc_fh *fh) 100 { 101 int ret = mnt_want_write(fh->fh_export->ex_path.mnt); 102 103 if (!ret) 104 fh->fh_want_write = 1; 105 return ret; 106 } 107 108 static inline void fh_drop_write(struct svc_fh *fh) 109 { 110 if (fh->fh_want_write) { 111 fh->fh_want_write = 0; 112 mnt_drop_write(fh->fh_export->ex_path.mnt); 113 } 114 } 115 116 static inline __be32 fh_getattr(struct svc_fh *fh, struct kstat *stat) 117 { 118 struct path p = {.mnt = fh->fh_export->ex_path.mnt, 119 .dentry = fh->fh_dentry}; 120 return nfserrno(vfs_getattr(&p, stat)); 121 } 122 123 #endif /* LINUX_NFSD_VFS_H */ 124