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/*
Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#ifndef _FD_H
#define _FD_H
#include "list.h"
#include <sys/types.h>
#include <unistd.h>
#include "glusterfs.h"
#include "locking.h"
#include "fd-lk.h"
#include "common-utils.h"
#define GF_ANON_FD_NO -2
#define GF_ANON_FD_FLAGS (O_RDWR|O_LARGEFILE)
struct _inode;
struct _dict;
struct fd_lk_ctx;
struct _fd_ctx {
union {
uint64_t key;
void *xl_key;
};
union {
uint64_t value1;
void *ptr1;
};
};
struct _fd {
uint64_t pid;
int32_t flags;
int32_t refcount;
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 */
struct fd_lk_ctx *lk_ctx;
gf_boolean_t anonymous; /* fd which does not have counterpart open
fd on backend (server for client, posix
for server). */
};
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"
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);
fd_t *
fd_ref (fd_t *fd);
fd_t *
__fd_unref (fd_t *fd);
void
fd_unref (fd_t *fd);
fd_t *
fd_create (struct _inode *inode, pid_t pid);
fd_t *
fd_create_uint64 (struct _inode *inode, uint64_t pid);
fd_t *
fd_lookup (struct _inode *inode, pid_t pid);
fd_t *
fd_lookup_uint64 (struct _inode *inode, uint64_t pid);
fd_t*
fd_lookup_anonymous (inode_t *inode, int32_t flags);
fd_t *
fd_anonymous (inode_t *inode);
fd_t *
fd_anonymous_with_flags (inode_t *inode, int32_t flags);
gf_boolean_t
fd_is_anonymous (fd_t *fd);
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_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);
void
fd_ctx_dump (fd_t *fd, char *prefix);
fdentry_t *
gf_fd_fdtable_copy_all_fds (fdtable_t *fdtable, uint32_t *count);
void
gf_fdptr_put (fdtable_t *fdtable, fd_t *fd);
#endif /* _FD_H */
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