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/*
Copyright (c) 2014 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 __META_H__
#define __META_H__
#include "strfd.h"
#define DEFAULT_META_DIR_NAME ".meta"
#define META_ROOT_GFID "ba926388-bb9c-4eec-ad60-79dba4cc083a"
#define IS_META_ROOT_GFID(g) (strcmp (uuid_utoa(g), META_ROOT_GFID) == 0)
typedef int (*meta_hook_t) (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata);
typedef struct {
dict_t *xdata;
} meta_local_t;
typedef struct {
char *meta_dir_name;
} meta_priv_t;
struct meta_dirent {
const char *name;
ia_type_t type;
meta_hook_t hook;
};
#define DOT_DOTDOT { .name = ".", .type = IA_IFDIR }, { .name = "..", .type = IA_IFDIR }
struct meta_ops {
struct meta_dirent *fixed_dirents;
int (*dir_fill) (xlator_t *this, inode_t *dir, struct meta_dirent **entries);
int (*file_fill) (xlator_t *this, inode_t *file, strfd_t *strfd);
int (*iatt_fill) (xlator_t *this, inode_t *inode, struct iatt *iatt);
int (*link_fill) (xlator_t *this, inode_t *inode, strfd_t *strfd);
int (*file_write) (xlator_t *this, fd_t *fd, struct iovec *iov, int count);
struct xlator_fops fops;
struct xlator_cbks cbks;
};
typedef struct {
char *data;
struct meta_dirent *dirents;
size_t size;
} meta_fd_t;
#define COUNT(arr) (sizeof(arr)/sizeof(arr[0]))
#define META_HOOK(loc) (__is_root_gfid (loc->pargfid) && !strcmp (loc->name, META_PRIV(THIS)->meta_dir_name))
#define META_PRIV(t) ((meta_priv_t *)(t->private))
#define META_STACK_UNWIND(fop, frame, params ...) \
do { \
meta_local_t *__local = NULL; \
xlator_t *__this = NULL; \
if (frame) { \
__local = frame->local; \
__this = frame->this; \
frame->local = NULL; \
} \
STACK_UNWIND_STRICT (fop, frame, params); \
if (__local) { \
meta_local_cleanup (__local, __this); \
} \
} while (0)
#define META_FOP(i, fop, fr, t, params ...) { \
struct xlator_fops *_fops = NULL; \
\
_fops = meta_fops_get (i, t); \
\
_fops->fop (fr, t, params); \
} while (0)
void meta_iatt_fill (struct iatt *iatt, inode_t *inode, ia_type_t type);
int meta_inode_discover (call_frame_t *frame, xlator_t *this, loc_t *loc,
dict_t *xdata);
int meta_ops_set (inode_t *inode, xlator_t *this, struct meta_ops *ops);
struct xlator_fops *meta_fops_get (inode_t *inode, xlator_t *this);
struct xlator_cbks *meta_cbks_get (inode_t *inode, xlator_t *this);
struct meta_ops *meta_ops_get (inode_t *inode, xlator_t *this);
int meta_ctx_set (inode_t *inode, xlator_t *this, void *ctx);
void *meta_ctx_get (inode_t *inode, xlator_t *this);
void meta_local_cleanup (meta_local_t *local, xlator_t *this);
struct xlator_fops *meta_defaults_init (struct xlator_fops *fops);
meta_fd_t *meta_fd_get (fd_t *fd, xlator_t *this);
int meta_fd_release (fd_t *fd, xlator_t *this);
dict_t *meta_direct_io_mode (dict_t *xdata, call_frame_t *frame);
meta_local_t *meta_local (call_frame_t *frame);
int meta_file_fill (xlator_t *this, fd_t *fd);
int meta_dir_fill (xlator_t *this, fd_t *fd);
int fixed_dirents_len (struct meta_dirent *dirents);
#endif /* __META_H__ */
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