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/*
Copyright (c) 2007-2009 Gluster, Inc. <http://www.gluster.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 _FD_H
#define _FD_H
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#include "list.h"
#include <sys/types.h>
#include <unistd.h>
#include "glusterfs.h"
#include "locking.h"
struct _inode;
struct _dict;
struct _fd_ctx {
union {
uint64_t key;
void *xl_key;
};
union {
uint64_t value1;
void *ptr1;
};
};
/* If this structure changes, please have mercy on the booster maintainer
* and update the fd_t struct in booster/src/booster-fd.h.
* See the comment there to know why.
*/
struct _fd {
pid_t pid;
int32_t flags;
int32_t refcount;
uint64_t flush_unique;
struct list_head inode_list;
struct _inode *inode;
gf_lock_t lock; /* used ONLY for manipulating
'struct _fd_ctx' array (_ctx).*/
struct _fd_ctx *_ctx;
int xl_count; /* Number of xl referred in this fd */
};
typedef struct _fd fd_t;
struct fd_table_entry {
fd_t *fd;
int next_free;
};
typedef struct fd_table_entry fdentry_t;
struct _fdtable {
int refcount;
uint32_t max_fds;
pthread_mutex_t lock;
fdentry_t *fdentries;
int first_free;
};
typedef struct _fdtable fdtable_t;
/* Signifies no more entries in the fd table. */
#define GF_FDTABLE_END -1
/* This is used to invalidated
* the next_free value in an fdentry that has been allocated
*/
#define GF_FDENTRY_ALLOCATED -2
#include "logging.h"
#include "xlator.h"
inline void
gf_fd_put (fdtable_t *fdtable, int32_t fd);
fd_t *
gf_fd_fdptr_get (fdtable_t *fdtable, int64_t fd);
fdtable_t *
gf_fd_fdtable_alloc (void);
int
gf_fd_unused_get (fdtable_t *fdtable, fd_t *fdptr);
fdentry_t *
gf_fd_fdtable_get_all_fds (fdtable_t *fdtable, uint32_t *count);
void
gf_fd_fdtable_destroy (fdtable_t *fdtable);
fd_t *
fd_ref (fd_t *fd);
void
fd_unref (fd_t *fd);
fd_t *
fd_create (struct _inode *inode, pid_t pid);
fd_t *
fd_lookup (struct _inode *inode, pid_t pid);
uint8_t
fd_list_empty (struct _inode *inode);
fd_t *
fd_bind (fd_t *fd);
int
fd_ctx_set (fd_t *fd, xlator_t *xlator, uint64_t value);
int
fd_ctx_get (fd_t *fd, xlator_t *xlator, uint64_t *value);
int
fd_ctx_del (fd_t *fd, xlator_t *xlator, uint64_t *value);
int
__fd_ctx_set (fd_t *fd, xlator_t *xlator, uint64_t value);
int
__fd_ctx_get (fd_t *fd, xlator_t *xlator, uint64_t *value);
int
__fd_ctx_del (fd_t *fd, xlator_t *xlator, uint64_t *value);
fd_t *
_fd_ref (fd_t *fd);
void
fd_ctx_dump (fd_t *fd, char *prefix);
#endif /* _FD_H */
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