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
9 * Portions Copyright (c) 2006 Sine Nomine Associates
15 Institution: The Information Technology Center, Carnegie-Mellon University
19 #ifndef AFS_VOL_PARTITION_H
20 #define AFS_VOL_PARTITION_H
22 #include <afs/param.h>
24 #if defined(AFS_HPUX_ENV)
25 #define AFS_DSKDEV "/dev/dsk"
26 #define AFS_RDSKDEV "/dev/rdsk/"
27 #define AFS_LVOLDEV "/dev/vg0"
28 #define AFS_ACVOLDEV "/dev/ac"
29 #define AFS_RACVOLDEV "/dev/ac/r"
31 #define AFS_DSKDEV "/dev"
32 #define AFS_RDSKDEV "/dev/r"
38 /* All Vice partitions on a server will have the following name prefix */
39 #define VICE_PARTITION_PREFIX "/vicep"
40 #define VICE_PREFIX_SIZE (sizeof(VICE_PARTITION_PREFIX)-1)
42 /* If a file by this name exists in a /vicepX directory, it means that
43 * this directory should be used as an AFS partition even if it's not
44 * on a separate partition (for instance if it's part of a large /).
45 * This feature only works with the NAMEI fileserver.
48 #define VICE_ALWAYSATTACH_FILE "AlwaysAttach"
51 #ifdef AFS_DEMAND_ATTACH_FS
54 * abstraction for files used for file-locking.
57 FD_t fd; /**< fd holding the lock(s) */
58 char *path; /**< path to the lock file */
60 pthread_mutex_t mutex; /**< lock for the VLockFile struct */
61 int refcount; /**< how many locks we have on the file */
65 * flag bits for 'flags' in struct VDiskLock.
67 #define VDISKLOCK_ACQUIRING 0x1 /**< is someone waiting for an fs lock? */
68 #define VDISKLOCK_ACQUIRED 0x2 /**< we have an fs lock */
71 * on-disk locking mechanism.
74 struct VLockFile *lockfile; /**< file holding the locks */
75 afs_uint32 offset; /**< what offset we lock in the file */
77 struct Lock rwlock; /**< rw lock for inter-thread locking */
78 pthread_mutex_t mutex; /**< lock for the DiskLock object itself */
79 pthread_cond_t cv; /**< cond var for 'acquiring' changes */
81 int lockers; /**< # of callers that have this locked; */
83 unsigned int flags; /**< see above for flag bits */
85 #endif /* AFS_DEMAND_ATTACH_FS */
88 /* For NT, the roles of "name" and "devName" are reversed. That is, "name"
89 * refers to the drive letter name and "devName" refers to the /vicep style
90 * or name. The reason for this is that a lot of places assume that "name"
91 * is the right thing to use to access the partition. Silly of them isn't it?
92 * The NT version of VInitPartition does the intial setup. There is an NT
93 * variant for VGetPartition as well. Also, the VolPartitionInfo RPC does
94 * a swap before sending the data out on the wire.
96 struct DiskPartition64 {
97 struct DiskPartition64 *next;
98 char *name; /* Mounted partition name */
99 char *devName; /* Device mounted on */
100 Device device; /* device number */
101 afs_int32 index; /* partition index (0<=x<=VOLMAXPARTS) */
102 FD_t lock_fd; /* File descriptor of this partition if locked; otherwise -1;
103 * Not used by the file server */
104 afs_int64 free; /* Total number of blocks (1K) presumed
105 * available on this partition (accounting
106 * for the minfree parameter for the
107 * partition). This is adjusted
108 * approximately by the sizes of files
109 * and directories read/written, and
110 * periodically the superblock is read and
111 * this is recomputed. This number can
112 * be negative, if the partition starts
114 afs_int64 totalUsable; /* Total number of blocks available on this
115 * partition, taking into account the minfree
116 * parameter for the partition (see the
117 * 4.2bsd command tunefs, but note that the
118 * bug mentioned there--that the superblock
119 * is not reread--does not apply here. The
120 * superblock is re-read periodically by
121 * VSetPartitionDiskUsage().) */
122 afs_int64 minFree; /* Number blocks to be kept free, as last read
123 * from the superblock */
125 afs_int64 f_files; /* total number of files in this partition */
126 #ifdef AFS_DEMAND_ATTACH_FS
128 struct rx_queue head; /* list of volumes on this partition (VByPList) */
129 afs_uint32 len; /* length of volume list */
130 int busy; /* asynch vol list op in progress */
131 pthread_cond_t cv; /* vol_list.busy change cond var */
133 struct VLockFile headerLockFile;
134 struct VDiskLock headerLock; /* lock for the collective headers on the partition */
135 #endif /* AFS_DEMAND_ATTACH_FS */
138 struct DiskPartitionStats64 {
140 afs_int64 totalUsable;
143 #ifdef AFS_DEMAND_ATTACH_FS
144 afs_int32 vol_list_len;
148 #define PART_DONTUPDATE 1
149 #define PART_DUPLICATE 2 /* NT - used if we find more than one partition
150 * using the same drive. Will be dumped before
151 * all partitions attached.
155 #include <WINNT/vptab.h>
156 extern int VValidVPTEntry(struct vptab *vptp);
160 struct Volume; /* Potentially forward definition */
162 extern struct DiskPartition64 *DiskPartitionList;
163 extern struct DiskPartition64 *VGetPartition(char * name, int abortp);
164 extern struct DiskPartition64 *VGetPartition_r(char * name, int abortp);
165 #ifdef AFS_DEMAND_ATTACH_FS
166 extern struct DiskPartition64 *VGetPartitionById(afs_int32 index, int abortp);
167 extern struct DiskPartition64 *VGetPartitionById_r(afs_int32 index, int abortp);
168 extern int VPartHeaderLock(struct DiskPartition64 *dp, int locktype);
169 extern void VPartHeaderUnlock(struct DiskPartition64 *dp, int locktype);
171 extern int VAttachPartitions(void);
172 extern void VLockPartition(char *name);
173 extern void VLockPartition_r(char *name);
174 extern void VUnlockPartition(char *name);
175 extern void VUnlockPartition_r(char *name);
176 extern void VResetDiskUsage(void);
177 extern void VResetDiskUsage_r(void);
178 extern void VSetPartitionDiskUsage(register struct DiskPartition64 *dp);
179 extern void VSetPartitionDiskUsage_r(register struct DiskPartition64 *dp);
180 extern char *VPartitionPath(struct DiskPartition64 *p);
181 extern void VAdjustDiskUsage(Error * ec, struct Volume *vp,
182 afs_sfsize_t blocks, afs_sfsize_t checkBlocks);
183 extern int VDiskUsage(struct Volume *vp, afs_sfsize_t blocks);
184 extern void VPrintDiskStats(void);
185 extern int VInitPartitionPackage(void);
187 #endif /* AFS_VOL_PARTITION_H */