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_filldir_t)(void *, const char *, int, loff_t, u64, unsigned); 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 __be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *, 58 struct file *, loff_t, loff_t, int); 59 #endif /* CONFIG_NFSD_V4 */ 60 __be32 nfsd_create(struct svc_rqst *, struct svc_fh *, 61 char *name, int len, struct iattr *attrs, 62 int type, dev_t rdev, struct svc_fh *res); 63 #ifdef CONFIG_NFSD_V3 64 __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *); 65 __be32 do_nfsd_create(struct svc_rqst *, struct svc_fh *, 66 char *name, int len, struct iattr *attrs, 67 struct svc_fh *res, int createmode, 68 u32 *verifier, bool *truncp, bool *created); 69 __be32 nfsd_commit(struct svc_rqst *, struct svc_fh *, 70 loff_t, unsigned long); 71 #endif /* CONFIG_NFSD_V3 */ 72 __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t, 73 int, struct file **); 74 void nfsd_close(struct file *); 75 struct raparms; 76 __be32 nfsd_get_tmp_read_open(struct svc_rqst *, struct svc_fh *, 77 struct file **, struct raparms **); 78 void nfsd_put_tmp_read_open(struct file *, struct raparms *); 79 __be32 nfsd_splice_read(struct svc_rqst *, 80 struct file *, loff_t, unsigned long *); 81 __be32 nfsd_readv(struct file *, loff_t, struct kvec *, int, 82 unsigned long *); 83 __be32 nfsd_read(struct svc_rqst *, struct svc_fh *, 84 loff_t, struct kvec *, int, unsigned long *); 85 __be32 nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *, 86 loff_t, struct kvec *,int, unsigned long *, int *); 87 __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *, 88 char *, int *); 89 __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *, 90 char *name, int len, char *path, 91 struct svc_fh *res); 92 __be32 nfsd_link(struct svc_rqst *, struct svc_fh *, 93 char *, int, struct svc_fh *); 94 __be32 nfsd_rename(struct svc_rqst *, 95 struct svc_fh *, char *, int, 96 struct svc_fh *, char *, int); 97 __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type, 98 char *name, int len); 99 __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *, 100 loff_t *, struct readdir_cd *, nfsd_filldir_t); 101 __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *, 102 struct kstatfs *, int access); 103 104 __be32 nfsd_permission(struct svc_rqst *, struct svc_export *, 105 struct dentry *, int); 106 107 static inline int fh_want_write(struct svc_fh *fh) 108 { 109 int ret = mnt_want_write(fh->fh_export->ex_path.mnt); 110 111 if (!ret) 112 fh->fh_want_write = 1; 113 return ret; 114 } 115 116 static inline void fh_drop_write(struct svc_fh *fh) 117 { 118 if (fh->fh_want_write) { 119 fh->fh_want_write = 0; 120 mnt_drop_write(fh->fh_export->ex_path.mnt); 121 } 122 } 123 124 static inline __be32 fh_getattr(struct svc_fh *fh, struct kstat *stat) 125 { 126 struct path p = {.mnt = fh->fh_export->ex_path.mnt, 127 .dentry = fh->fh_dentry}; 128 return nfserrno(vfs_getattr(&p, stat)); 129 } 130 131 #endif /* LINUX_NFSD_VFS_H */ 132