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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 423 | giacomo | 1 | /* |
| 2 | * linux/include/linux/nfsd/nfsd.h |
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| 3 | * |
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| 4 | * Hodge-podge collection of knfsd-related stuff. |
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| 5 | * I will sort this out later. |
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| 6 | * |
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| 7 | * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> |
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| 8 | */ |
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| 9 | |||
| 10 | #ifndef LINUX_NFSD_NFSD_H |
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| 11 | #define LINUX_NFSD_NFSD_H |
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| 12 | |||
| 13 | #include <linux/config.h> |
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| 14 | #include <linux/types.h> |
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| 15 | #include <linux/unistd.h> |
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| 16 | #include <linux/dirent.h> |
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| 17 | #include <linux/fs.h> |
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| 18 | #include <linux/mount.h> |
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| 19 | |||
| 20 | #include <linux/nfsd/debug.h> |
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| 21 | #include <linux/nfsd/nfsfh.h> |
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| 22 | #include <linux/nfsd/export.h> |
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| 23 | #include <linux/nfsd/auth.h> |
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| 24 | #include <linux/nfsd/stats.h> |
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| 25 | #include <linux/nfsd/interface.h> |
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| 26 | /* |
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| 27 | * nfsd version |
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| 28 | */ |
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| 29 | #define NFSD_VERSION "0.5" |
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| 30 | #define NFSD_SUPPORTED_MINOR_VERSION 0 |
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| 31 | |||
| 32 | #ifdef __KERNEL__ |
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| 33 | /* |
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| 34 | * Special flags for nfsd_permission. These must be different from MAY_READ, |
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| 35 | * MAY_WRITE, and MAY_EXEC. |
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| 36 | */ |
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| 37 | #define MAY_NOP 0 |
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| 38 | #define MAY_SATTR 8 |
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| 39 | #define MAY_TRUNC 16 |
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| 40 | #define MAY_LOCK 32 |
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| 41 | #define MAY_OWNER_OVERRIDE 64 |
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| 42 | #define MAY_LOCAL_ACCESS 128 /* IRIX doing local access check on device special file*/ |
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| 43 | #if (MAY_SATTR | MAY_TRUNC | MAY_LOCK | MAY_OWNER_OVERRIDE | MAY_LOCAL_ACCESS) & (MAY_READ | MAY_WRITE | MAY_EXEC) |
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| 44 | # error "please use a different value for MAY_SATTR or MAY_TRUNC or MAY_LOCK or MAY_LOCAL_ACCESS or MAY_OWNER_OVERRIDE." |
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| 45 | #endif |
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| 46 | #define MAY_CREATE (MAY_EXEC|MAY_WRITE) |
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| 47 | #define MAY_REMOVE (MAY_EXEC|MAY_WRITE|MAY_TRUNC) |
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| 48 | |||
| 49 | /* |
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| 50 | * Callback function for readdir |
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| 51 | */ |
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| 52 | struct readdir_cd { |
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| 53 | int err; /* 0, nfserr, or nfserr_eof */ |
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| 54 | }; |
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| 55 | typedef int (*encode_dent_fn)(struct readdir_cd *, const char *, |
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| 56 | int, loff_t, ino_t, unsigned int); |
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| 57 | typedef int (*nfsd_dirop_t)(struct inode *, struct dentry *, int, int); |
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| 58 | |||
| 59 | extern struct svc_program nfsd_program; |
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| 60 | extern struct svc_version nfsd_version2, nfsd_version3, |
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| 61 | nfsd_version4; |
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| 62 | |||
| 63 | /* |
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| 64 | * Function prototypes. |
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| 65 | */ |
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| 66 | int nfsd_svc(unsigned short port, int nrservs); |
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| 67 | int nfsd_dispatch(struct svc_rqst *rqstp, u32 *statp); |
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| 68 | |||
| 69 | /* nfsd/vfs.c */ |
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| 70 | int fh_lock_parent(struct svc_fh *, struct dentry *); |
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| 71 | int nfsd_racache_init(int); |
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| 72 | void nfsd_racache_shutdown(void); |
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| 73 | int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp, |
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| 74 | struct svc_export **expp); |
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| 75 | int nfsd_lookup(struct svc_rqst *, struct svc_fh *, |
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| 76 | const char *, int, struct svc_fh *); |
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| 77 | int nfsd_setattr(struct svc_rqst *, struct svc_fh *, |
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| 78 | struct iattr *, int, time_t); |
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| 79 | int nfsd_create(struct svc_rqst *, struct svc_fh *, |
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| 80 | char *name, int len, struct iattr *attrs, |
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| 81 | int type, dev_t rdev, struct svc_fh *res); |
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| 82 | #ifdef CONFIG_NFSD_V3 |
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| 83 | int nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *); |
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| 84 | int nfsd_create_v3(struct svc_rqst *, struct svc_fh *, |
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| 85 | char *name, int len, struct iattr *attrs, |
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| 86 | struct svc_fh *res, int createmode, |
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| 87 | u32 *verifier, int *truncp); |
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| 88 | int nfsd_commit(struct svc_rqst *, struct svc_fh *, |
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| 89 | off_t, unsigned long); |
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| 90 | #endif /* CONFIG_NFSD_V3 */ |
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| 91 | int nfsd_open(struct svc_rqst *, struct svc_fh *, int, |
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| 92 | int, struct file *); |
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| 93 | void nfsd_close(struct file *); |
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| 94 | int nfsd_read(struct svc_rqst *, struct svc_fh *, |
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| 95 | loff_t, struct iovec *,int, unsigned long *); |
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| 96 | int nfsd_write(struct svc_rqst *, struct svc_fh *, |
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| 97 | loff_t, struct iovec *,int, unsigned long, int *); |
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| 98 | int nfsd_readlink(struct svc_rqst *, struct svc_fh *, |
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| 99 | char *, int *); |
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| 100 | int nfsd_symlink(struct svc_rqst *, struct svc_fh *, |
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| 101 | char *name, int len, char *path, int plen, |
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| 102 | struct svc_fh *res, struct iattr *); |
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| 103 | int nfsd_link(struct svc_rqst *, struct svc_fh *, |
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| 104 | char *, int, struct svc_fh *); |
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| 105 | int nfsd_rename(struct svc_rqst *, |
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| 106 | struct svc_fh *, char *, int, |
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| 107 | struct svc_fh *, char *, int); |
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| 108 | int nfsd_remove(struct svc_rqst *, |
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| 109 | struct svc_fh *, char *, int); |
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| 110 | int nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type, |
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| 111 | char *name, int len); |
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| 112 | int nfsd_truncate(struct svc_rqst *, struct svc_fh *, |
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| 113 | unsigned long size); |
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| 114 | int nfsd_readdir(struct svc_rqst *, struct svc_fh *, |
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| 115 | loff_t *, struct readdir_cd *, encode_dent_fn); |
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| 116 | int nfsd_statfs(struct svc_rqst *, struct svc_fh *, |
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| 117 | struct kstatfs *); |
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| 118 | |||
| 119 | int nfsd_notify_change(struct inode *, struct iattr *); |
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| 120 | int nfsd_permission(struct svc_export *, struct dentry *, int); |
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| 121 | |||
| 122 | |||
| 123 | /* |
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| 124 | * NFSv4 State |
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| 125 | */ |
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| 126 | #ifdef CONFIG_NFSD_V4 |
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| 127 | void nfs4_state_init(void); |
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| 128 | void nfs4_state_shutdown(void); |
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| 129 | #else |
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| 130 | void static inline nfs4_state_init(void){} |
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| 131 | void static inline nfs4_state_shutdown(void){} |
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| 132 | #endif |
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| 133 | |||
| 134 | /* |
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| 135 | * lockd binding |
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| 136 | */ |
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| 137 | void nfsd_lockd_init(void); |
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| 138 | void nfsd_lockd_shutdown(void); |
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| 139 | |||
| 140 | |||
| 141 | /* |
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| 142 | * These macros provide pre-xdr'ed values for faster operation. |
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| 143 | */ |
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| 144 | #define nfs_ok __constant_htonl(NFS_OK) |
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| 145 | #define nfserr_perm __constant_htonl(NFSERR_PERM) |
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| 146 | #define nfserr_noent __constant_htonl(NFSERR_NOENT) |
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| 147 | #define nfserr_io __constant_htonl(NFSERR_IO) |
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| 148 | #define nfserr_nxio __constant_htonl(NFSERR_NXIO) |
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| 149 | #define nfserr_eagain __constant_htonl(NFSERR_EAGAIN) |
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| 150 | #define nfserr_acces __constant_htonl(NFSERR_ACCES) |
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| 151 | #define nfserr_exist __constant_htonl(NFSERR_EXIST) |
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| 152 | #define nfserr_xdev __constant_htonl(NFSERR_XDEV) |
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| 153 | #define nfserr_nodev __constant_htonl(NFSERR_NODEV) |
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| 154 | #define nfserr_notdir __constant_htonl(NFSERR_NOTDIR) |
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| 155 | #define nfserr_isdir __constant_htonl(NFSERR_ISDIR) |
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| 156 | #define nfserr_inval __constant_htonl(NFSERR_INVAL) |
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| 157 | #define nfserr_fbig __constant_htonl(NFSERR_FBIG) |
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| 158 | #define nfserr_nospc __constant_htonl(NFSERR_NOSPC) |
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| 159 | #define nfserr_rofs __constant_htonl(NFSERR_ROFS) |
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| 160 | #define nfserr_mlink __constant_htonl(NFSERR_MLINK) |
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| 161 | #define nfserr_opnotsupp __constant_htonl(NFSERR_OPNOTSUPP) |
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| 162 | #define nfserr_nametoolong __constant_htonl(NFSERR_NAMETOOLONG) |
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| 163 | #define nfserr_notempty __constant_htonl(NFSERR_NOTEMPTY) |
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| 164 | #define nfserr_dquot __constant_htonl(NFSERR_DQUOT) |
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| 165 | #define nfserr_stale __constant_htonl(NFSERR_STALE) |
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| 166 | #define nfserr_remote __constant_htonl(NFSERR_REMOTE) |
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| 167 | #define nfserr_wflush __constant_htonl(NFSERR_WFLUSH) |
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| 168 | #define nfserr_badhandle __constant_htonl(NFSERR_BADHANDLE) |
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| 169 | #define nfserr_notsync __constant_htonl(NFSERR_NOT_SYNC) |
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| 170 | #define nfserr_badcookie __constant_htonl(NFSERR_BAD_COOKIE) |
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| 171 | #define nfserr_notsupp __constant_htonl(NFSERR_NOTSUPP) |
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| 172 | #define nfserr_toosmall __constant_htonl(NFSERR_TOOSMALL) |
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| 173 | #define nfserr_serverfault __constant_htonl(NFSERR_SERVERFAULT) |
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| 174 | #define nfserr_badtype __constant_htonl(NFSERR_BADTYPE) |
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| 175 | #define nfserr_jukebox __constant_htonl(NFSERR_JUKEBOX) |
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| 176 | #define nfserr_denied __constant_htonl(NFSERR_DENIED) |
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| 177 | #define nfserr_deadlock __constant_htonl(NFSERR_DEADLOCK) |
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| 178 | #define nfserr_expired __constant_htonl(NFSERR_EXPIRED) |
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| 179 | #define nfserr_bad_cookie __constant_htonl(NFSERR_BAD_COOKIE) |
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| 180 | #define nfserr_same __constant_htonl(NFSERR_SAME) |
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| 181 | #define nfserr_clid_inuse __constant_htonl(NFSERR_CLID_INUSE) |
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| 182 | #define nfserr_stale_clientid __constant_htonl(NFSERR_STALE_CLIENTID) |
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| 183 | #define nfserr_resource __constant_htonl(NFSERR_RESOURCE) |
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| 184 | #define nfserr_nofilehandle __constant_htonl(NFSERR_NOFILEHANDLE) |
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| 185 | #define nfserr_minor_vers_mismatch __constant_htonl(NFSERR_MINOR_VERS_MISMATCH) |
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| 186 | #define nfserr_share_denied __constant_htonl(NFSERR_SHARE_DENIED) |
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| 187 | #define nfserr_stale_stateid __constant_htonl(NFSERR_STALE_STATEID) |
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| 188 | #define nfserr_old_stateid __constant_htonl(NFSERR_OLD_STATEID) |
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| 189 | #define nfserr_bad_stateid __constant_htonl(NFSERR_BAD_STATEID) |
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| 190 | #define nfserr_bad_seqid __constant_htonl(NFSERR_BAD_SEQID) |
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| 191 | #define nfserr_symlink __constant_htonl(NFSERR_SYMLINK) |
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| 192 | #define nfserr_not_same __constant_htonl(NFSERR_NOT_SAME) |
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| 193 | #define nfserr_readdir_nospc __constant_htonl(NFSERR_READDIR_NOSPC) |
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| 194 | #define nfserr_bad_xdr __constant_htonl(NFSERR_BAD_XDR) |
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| 195 | #define nfserr_openmode __constant_htonl(NFSERR_OPENMODE) |
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| 196 | |||
| 197 | /* error codes for internal use */ |
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| 198 | /* if a request fails due to kmalloc failure, it gets dropped. |
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| 199 | * Client should resend eventually |
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| 200 | */ |
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| 201 | #define nfserr_dropit __constant_htonl(30000) |
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| 202 | /* end-of-file indicator in readdir */ |
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| 203 | #define nfserr_eof __constant_htonl(30001) |
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| 204 | |||
| 205 | /* Check for dir entries '.' and '..' */ |
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| 206 | #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.')) |
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| 207 | |||
| 208 | /* |
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| 209 | * Time of server startup |
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| 210 | */ |
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| 211 | extern struct timeval nfssvc_boot; |
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| 212 | |||
| 213 | static inline int is_fsid(struct svc_fh *fh, struct knfsd_fh *reffh) |
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| 214 | { |
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| 215 | if (fh->fh_export->ex_flags & NFSEXP_FSID) { |
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| 216 | struct vfsmount *mnt = fh->fh_export->ex_mnt; |
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| 217 | if (!old_valid_dev(mnt->mnt_sb->s_dev) || |
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| 218 | (reffh->fh_version == 1 && reffh->fh_fsid_type == 1)) |
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| 219 | return 1; |
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| 220 | } |
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| 221 | return 0; |
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| 222 | } |
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| 223 | |||
| 224 | |||
| 225 | #ifdef CONFIG_NFSD_V4 |
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| 226 | |||
| 227 | /* before processing a COMPOUND operation, we have to check that there |
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| 228 | * is enough space in the buffer for XDR encode to succeed. otherwise, |
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| 229 | * we might process an operation with side effects, and be unable to |
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| 230 | * tell the client that the operation succeeded. |
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| 231 | * |
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| 232 | * COMPOUND_SLACK_SPACE - this is the minimum amount of buffer space |
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| 233 | * needed to encode an "ordinary" _successful_ operation. (GETATTR, |
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| 234 | * READ, READDIR, and READLINK have their own buffer checks.) if we |
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| 235 | * fall below this level, we fail the next operation with NFS4ERR_RESOURCE. |
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| 236 | * |
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| 237 | * COMPOUND_ERR_SLACK_SPACE - this is the minimum amount of buffer space |
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| 238 | * needed to encode an operation which has failed with NFS4ERR_RESOURCE. |
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| 239 | * care is taken to ensure that we never fall below this level for any |
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| 240 | * reason. |
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| 241 | */ |
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| 242 | #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */ |
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| 243 | #define COMPOUND_ERR_SLACK_SPACE 12 /* OP_SETATTR */ |
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| 244 | |||
| 245 | #define NFSD_LEASE_TIME 60 /* seconds */ |
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| 246 | #define NFSD_LAUNDROMAT_MINTIMEOUT 10 /* seconds */ |
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| 247 | |||
| 248 | /* |
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| 249 | * The following attributes are currently not supported by the NFSv4 server: |
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| 250 | * ACL (will be supported in a forthcoming patch) |
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| 251 | * ARCHIVE (deprecated anyway) |
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| 252 | * FS_LOCATIONS (will be supported eventually) |
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| 253 | * HIDDEN (unlikely to be supported any time soon) |
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| 254 | * MIMETYPE (unlikely to be supported any time soon) |
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| 255 | * QUOTA_* (will be supported in a forthcoming patch) |
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| 256 | * SYSTEM (unlikely to be supported any time soon) |
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| 257 | * TIME_BACKUP (unlikely to be supported any time soon) |
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| 258 | * TIME_CREATE (unlikely to be supported any time soon) |
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| 259 | */ |
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| 260 | #define NFSD_SUPPORTED_ATTRS_WORD0 \ |
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| 261 | (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \ |
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| 262 | | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \ |
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| 263 | | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \ |
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| 264 | | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \ |
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| 265 | | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \ |
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| 266 | | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \ |
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| 267 | | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \ |
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| 268 | | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_HOMOGENEOUS \ |
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| 269 | | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \ |
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| 270 | | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE) |
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| 271 | |||
| 272 | #define NFSD_SUPPORTED_ATTRS_WORD1 \ |
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| 273 | (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \ |
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| 274 | | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \ |
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| 275 | | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \ |
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| 276 | | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \ |
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| 277 | | FATTR4_WORD1_TIME_CREATE | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \ |
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| 278 | | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET) |
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| 279 | |||
| 280 | /* These will return ERR_INVAL if specified in GETATTR or READDIR. */ |
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| 281 | #define NFSD_WRITEONLY_ATTRS_WORD1 \ |
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| 282 | (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET) |
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| 283 | |||
| 284 | /* These are the only attrs allowed in CREATE/OPEN/SETATTR. */ |
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| 285 | #define NFSD_WRITEABLE_ATTRS_WORD0 FATTR4_WORD0_SIZE |
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| 286 | #define NFSD_WRITEABLE_ATTRS_WORD1 \ |
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| 287 | (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \ |
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| 288 | | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_MODIFY_SET) |
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| 289 | |||
| 290 | #endif /* CONFIG_NFSD_V4 */ |
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| 291 | |||
| 292 | #endif /* __KERNEL__ */ |
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| 293 | |||
| 294 | #endif /* LINUX_NFSD_NFSD_H */ |