summaryrefslogtreecommitdiff
path: root/fs/afs/cell.h
diff options
context:
space:
mode:
Diffstat (limited to 'fs/afs/cell.h')
-rw-r--r--fs/afs/cell.h78
1 files changed, 78 insertions, 0 deletions
diff --git a/fs/afs/cell.h b/fs/afs/cell.h
new file mode 100644
index 000000000000..48349108fb00
--- /dev/null
+++ b/fs/afs/cell.h
@@ -0,0 +1,78 @@
+/* cell.h: AFS cell record
+ *
+ * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _LINUX_AFS_CELL_H
+#define _LINUX_AFS_CELL_H
+
+#include "types.h"
+#include "cache.h"
+
+#define AFS_CELL_MAX_ADDRS 15
+
+extern volatile int afs_cells_being_purged; /* T when cells are being purged by rmmod */
+
+/*****************************************************************************/
+/*
+ * entry in the cached cell catalogue
+ */
+struct afs_cache_cell
+{
+ char name[64]; /* cell name (padded with NULs) */
+ struct in_addr vl_servers[15]; /* cached cell VL servers */
+};
+
+/*****************************************************************************/
+/*
+ * AFS cell record
+ */
+struct afs_cell
+{
+ atomic_t usage;
+ struct list_head link; /* main cell list link */
+ struct list_head proc_link; /* /proc cell list link */
+ struct proc_dir_entry *proc_dir; /* /proc dir for this cell */
+#ifdef AFS_CACHING_SUPPORT
+ struct cachefs_cookie *cache; /* caching cookie */
+#endif
+
+ /* server record management */
+ rwlock_t sv_lock; /* active server list lock */
+ struct list_head sv_list; /* active server list */
+ struct list_head sv_graveyard; /* inactive server list */
+ spinlock_t sv_gylock; /* inactive server list lock */
+
+ /* volume location record management */
+ struct rw_semaphore vl_sem; /* volume management serialisation semaphore */
+ struct list_head vl_list; /* cell's active VL record list */
+ struct list_head vl_graveyard; /* cell's inactive VL record list */
+ spinlock_t vl_gylock; /* graveyard lock */
+ unsigned short vl_naddrs; /* number of VL servers in addr list */
+ unsigned short vl_curr_svix; /* current server index */
+ struct in_addr vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */
+
+ char name[0]; /* cell name - must go last */
+};
+
+extern int afs_cell_init(char *rootcell);
+
+extern int afs_cell_create(const char *name, char *vllist, struct afs_cell **_cell);
+
+extern int afs_cell_lookup(const char *name, unsigned nmsize, struct afs_cell **_cell);
+
+#define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0)
+
+extern struct afs_cell *afs_get_cell_maybe(struct afs_cell **_cell);
+
+extern void afs_put_cell(struct afs_cell *cell);
+
+extern void afs_cell_purge(void);
+
+#endif /* _LINUX_AFS_CELL_H */