2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
13 Institution: The Information Technology Center, Carnegie-Mellon University
17 #define Date afs_uint32
19 typedef struct ViceLock
25 #define ViceLockCheckLocked(vptr) ((vptr)->lockTime == 0)
26 #define ViceLockClear(vptr) ((vptr)->lockCount = (vptr)->lockTime = 0)
30 /*typedef enum {vNull=0, vFile=1, vDirectory=2, vSymlink=3} VnodeType;*/
31 typedef int VnodeType;
37 /*typedef enum {vLarge=0,vSmall=1} VnodeClass;*/
40 typedef int VnodeClass;
41 #define VNODECLASSWIDTH 1
42 #define VNODECLASSMASK ((1<<VNODECLASSWIDTH)-1)
43 #define nVNODECLASSES (VNODECLASSMASK+1)
45 struct VnodeClassInfo {
46 struct Vnode *lruHead; /* Head of list of vnodes of this class */
47 int diskSize; /* size of vnode disk object, power of 2 */
48 int logSize; /* log 2 diskSize */
49 int residentSize; /* resident size of vnode */
50 int cacheSize; /* Vnode cache size */
51 bit32 magic; /* Magic number for this type of vnode,
52 for as long as we're using vnode magic
54 int allocs; /* Total number of successful allocation
55 requests; this is the same as the number
56 of sanity checks on the vnode index */
57 int gets,reads; /* Number of VGetVnodes and corresponding
59 int writes; /* Number of vnode writes */
62 extern struct VnodeClassInfo VnodeClassInfo[nVNODECLASSES];
64 #define vnodeTypeToClass(type) ((type) == vDirectory? vLarge: vSmall)
65 #define vnodeIdToClass(vnodeId) ((vnodeId-1)&VNODECLASSMASK)
66 #define vnodeIdToBitNumber(v) (((v)-1)>>VNODECLASSWIDTH)
67 /* The following calculation allows for a header record at the beginning
68 of the index. The header record is the same size as a vnode */
69 #define vnodeIndexOffset(vcp,vnodeNumber) \
70 ((vnodeIdToBitNumber(vnodeNumber)+1)<<(vcp)->logSize)
71 #define bitNumberToVnodeNumber(b,class) (((b)<<VNODECLASSWIDTH)+(class)+1)
72 #define vnodeIsDirectory(vnodeNumber) (vnodeIdToClass(vnodeNumber) == vLarge)
74 typedef struct VnodeDiskObject {
75 unsigned int type:3; /* Vnode is file, directory, symbolic link
77 unsigned int cloned:1; /* This vnode was cloned--therefore the inode
78 is copy-on-write; only set for directories*/
79 unsigned int modeBits:12; /* Unix mode bits */
80 signed int linkCount:16; /* Number of directory references to vnode
81 (from single directory only!) */
82 bit32 length; /* Number of bytes in this file */
83 Unique uniquifier; /* Uniquifier for the vnode; assigned
84 from the volume uniquifier (actually
85 from nextVnodeUnique in the Volume
87 FileVersion dataVersion; /* version number of the data */
88 afs_int32 vn_ino_lo; /* inode number of the data attached to
89 this vnode - entire ino for standard*/
90 Date unixModifyTime;/* set by user */
91 UserId author; /* Userid of the last user storing the file */
92 UserId owner; /* Userid of the user who created the file */
93 VnodeId parent; /* Parent directory vnode */
94 bit32 vnodeMagic; /* Magic number--mainly for file server
96 # define SMALLVNODEMAGIC 0xda8c041F
97 # define LARGEVNODEMAGIC 0xad8765fe
98 /* Vnode magic can be removed, someday, if we run need the room. Simply
99 have to be sure that the thing we replace can be VNODEMAGIC, rather
100 than 0 (in an old file system). Or go through and zero the fields,
101 when we notice a version change (the index version number) */
102 ViceLock lock; /* Advisory lock */
103 Date serverModifyTime; /* Used only by the server; for incremental
105 afs_int32 group; /* unix group */
106 afs_int32 vn_ino_hi; /* high part of 64 bit inode. */
114 #define SIZEOF_SMALLDISKVNODE 64
115 #define CHECKSIZE_SMALLVNODE\
116 (sizeof(VnodeDiskObject) == SIZEOF_SMALLDISKVNODE)
117 #define SIZEOF_LARGEDISKVNODE 256
119 typedef struct Vnode {
120 struct Vnode *hashNext;/* Next vnode on hash conflict chain */
121 struct Vnode *lruNext; /* Less recently used vnode than this one */
122 struct Vnode *lruPrev; /* More recently used vnode than this one */
123 /* The lruNext, lruPrev fields are not
124 meaningful if the vnode is in use */
125 bit16 hashIndex; /* Hash table index */
127 unsigned changed_newTime:1; /* 1 if vnode changed, write time */
128 unsigned changed_oldTime:1; /* 1 changed, don't update time. */
129 unsigned delete:1; /* 1 if the vnode should be deleted; in
130 this case, changed must also be 1 */
132 byte changed_newTime:1; /* 1 if vnode changed, write time */
133 byte changed_oldTime:1; /* 1 changed, don't update time. */
134 byte delete:1; /* 1 if the vnode should be deleted; in
135 this case, changed must also be 1 */
139 *volumePtr; /* Pointer to the volume containing this file*/
140 byte nUsers; /* Number of lwp's who have done a VGetVnode */
141 bit16 cacheCheck; /* Must equal the value in the volume Header
142 for the cache entry to be valid */
143 struct Lock lock; /* Internal lock */
144 #ifdef AFS_PTHREAD_ENV
145 pthread_t writer; /* thread holding write lock */
146 #else /* AFS_PTHREAD_ENV */
147 PROCESS writer; /* Process id having write lock */
148 #endif /* AFS_PTHREAD_ENV */
150 VnodeDiskObject disk; /* The actual disk data for the vnode */
153 #define SIZEOF_LARGEVNODE \
154 (sizeof(struct Vnode) - sizeof(VnodeDiskObject) + SIZEOF_LARGEDISKVNODE)
155 #define SIZEOF_SMALLVNODE (sizeof (struct Vnode))
157 #ifdef AFS_64BIT_IOPS_ENV
158 #define VN_GET_INO(V) ((Inode)((V)->disk.vn_ino_lo | \
159 ((V)->disk.vn_ino_hi ? \
160 (((Inode)(V)->disk.vn_ino_hi)<<32) : 0)))
162 #define VN_SET_INO(V, I) ((V)->disk.vn_ino_lo = (int)((I)&0xffffffff), \
163 ((V)->disk.vn_ino_hi = (I) ? \
164 (int)(((I)>>32)&0xffffffff) : 0))
166 #define VNDISK_GET_INO(V) ((Inode)((V)->vn_ino_lo | \
168 (((Inode)(V)->vn_ino_hi)<<32) : 0)))
170 #define VNDISK_SET_INO(V, I) ((V)->vn_ino_lo = (int)(I&0xffffffff), \
171 ((V)->vn_ino_hi = (I) ? \
172 (int)(((I)>>32)&0xffffffff) : 0))
174 #define VN_GET_INO(V) ((V)->disk.vn_ino_lo)
175 #define VN_SET_INO(V, I) ((V)->disk.vn_ino_lo = (I))
176 #define VNDISK_GET_INO(V) ((V)->vn_ino_lo)
177 #define VNDISK_SET_INO(V, I) ((V)->vn_ino_lo = (I))
180 #define VVnodeDiskACL(v) /* Only call this with large (dir) vnode!! */ \
181 ((AL_AccessList *) (((byte *)(v))+SIZEOF_SMALLDISKVNODE))
182 #define VVnodeACL(vnp) (VVnodeDiskACL(&(vnp)->disk))
183 /* VAclSize is defined this way to allow information in the vnode header
184 to grow, in a POSSIBLY upward compatible manner. SIZEOF_SMALLDISKVNODE
185 is the maximum size of the basic vnode. The vnode header of either type
186 can actually grow to this size without conflicting with the ACL on larger
188 #define VAclSize(vnp) (SIZEOF_LARGEDISKVNODE - SIZEOF_SMALLDISKVNODE)
189 #define VAclDiskSize(v) (SIZEOF_LARGEDISKVNODE - SIZEOF_SMALLDISKVNODE)
190 extern int VolumeHashOffset();
191 extern int VolumeHashOffset_r();
192 extern VInitVnodes();
193 extern VInitVnodes_r();
194 extern Vnode *VGetVnode();
195 extern Vnode *VGetVnode_r();
197 extern VputVnode_r();
198 extern VVnodeWriteToRead();
199 extern VVnodeWriteToRead_r();
200 extern Vnode *VAllocVnode();
201 extern Vnode *VAllocVnode_r();
203 extern VFreeVnode_r();