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/*
Copyright (c) 2007, 2008 Z RESEARCH, Inc. <http://www.zresearch.com>
This file is part of GlusterFS.
GlusterFS 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 3 of the License,
or (at your option) any later version.
GlusterFS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see
<http://www.gnu.org/licenses/>.
*/
#ifndef _INODE_H
#define _INODE_H
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#include <stdint.h>
#include <sys/types.h>
struct _inode_table;
typedef struct _inode_table inode_table_t;
struct _inode;
typedef struct _inode inode_t;
struct _dentry;
typedef struct _dentry dentry_t;
#include "list.h"
#include "xlator.h"
struct _inode_table {
pthread_mutex_t lock;
size_t hashsize; /* bucket size of inode hash and dentry hash */
char *name; /* name of the inode table, just for gf_log() */
inode_t *root; /* root directory inode, with number 1 */
xlator_t *xl; /* xlator to be called to do purge */
uint32_t lru_limit; /* maximum LRU cache size */
struct list_head *inode_hash; /* buckets for inode hash table */
struct list_head *name_hash; /* buckets for dentry hash table */
struct list_head active; /* list of inodes currently active (in an fop) */
uint32_t active_size; /* count of inodes in active list */
struct list_head lru; /* list of inodes recently used.
lru.next most recent */
uint32_t lru_size; /* count of inodes in lru list */
struct list_head purge; /* list of inodes to be purged soon */
uint32_t purge_size; /* count of inodes in purge list */
};
struct _dentry {
struct list_head inode_list; /* list of dentries of inode */
struct list_head hash; /* hash table pointers */
struct list_head parent_list; /* list of dentries under the parent */
inode_t *inode; /* inode of this directory entry */
char *name; /* name of the directory entry */
inode_t *parent; /* directory of the entry */
};
//#define ZR_INODE_CTX_VALUE_LEN 2
struct _inode_ctx {
uint64_t key;
uint64_t value;
//uint64_t value[ZR_INODE_CTX_VALUE_LEN];
};
struct _inode {
inode_table_t *table; /* the table this inode belongs to */
gf_lock_t lock;
uint64_t nlookup;
uint64_t generation;
uint32_t ref; /* reference count on this inode */
ino_t ino; /* inode number in the storage (persistent) */
dict_t *ctx; /* per xlator private */
mode_t st_mode; /* what kind of file */
struct list_head fd_list; /* list of open files on this inode */
struct list_head dentry_list; /* list of directory entries for this inode */
struct list_head child_list; /* list of directory entries under this inode */
struct list_head hash; /* hash table pointers */
struct list_head list; /* active/lru/purge */
struct _inode_ctx *_ctx; /* replacement for dict_t *(inode->ctx) */
};
inode_table_t *
inode_table_new (size_t lru_limit, xlator_t *xl);
inode_t *
inode_new (inode_table_t *table);
inode_t *
inode_search (inode_table_t *table, ino_t ino, const char *name);
int
inode_link (inode_t *inode, inode_t *parent,
const char *name, struct stat *stbuf);
void
inode_unlink (inode_t *inode,
inode_t *parent,
const char *name);
inode_t *
inode_parent (inode_t *inode, ino_t par, const char *name);
inode_t *
inode_ref (inode_t *inode);
inode_t *
inode_unref (inode_t *inode);
int
inode_lookup (inode_t *inode);
int
inode_forget (inode_t *inode,
uint64_t nlookup);
int
inode_rename (inode_table_t *table,
inode_t *olddir,
const char *oldname,
inode_t *newdir,
const char *newname,
inode_t *inode,
struct stat *stbuf);
int32_t
inode_path (inode_t *inode,
const char *name,
char **bufp);
inode_t *
inode_from_path (inode_table_t *table,
const char *path);
int
inode_ctx_put (inode_t *inode, xlator_t *xlator, uint64_t value);
int
inode_ctx_get (inode_t *inode, xlator_t *xlator, uint64_t *value);
int
inode_ctx_del (inode_t *inode, xlator_t *xlator, uint64_t *value);
#endif /* _INODE_H */
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