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/*
Copyright (c) 2015 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 __SHARD_H__
#define __SHARD_H__
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#include "xlator.h"
#include "compat-errno.h"
#define GF_SHARD_DIR ".shard"
#define SHARD_MIN_BLOCK_SIZE (4 * GF_UNIT_MB)
#define SHARD_MAX_BLOCK_SIZE (4 * GF_UNIT_TB)
#define GF_XATTR_SHARD_BLOCK_SIZE "trusted.glusterfs.shard.block-size"
#define SHARD_ROOT_GFID "be318638-e8a0-4c6d-977d-7a937aa84806"
#define SHARD_INODE_LRU_LIMIT 4096
#define get_lowest_block(off, shard_size) (off / shard_size)
#define get_highest_block(off, len, shard_size) ((off+len-1) / shard_size)
#define SHARD_ENTRY_FOP_CHECK(loc, op_errno, label) do { \
if ((loc->name && !strcmp (GF_SHARD_DIR, loc->name)) && \
(((loc->parent) && \
__is_root_gfid (loc->parent->gfid)) || \
__is_root_gfid (loc->pargfid))) { \
op_errno = EPERM; \
goto label; \
} \
\
if ((loc->parent && \
__is_shard_dir (loc->parent->gfid)) || \
__is_shard_dir (loc->pargfid)) { \
op_errno = EPERM; \
goto label; \
} \
} while (0)
#define SHARD_INODE_OP_CHECK(gfid, err, label) do { \
if (__is_shard_dir(gfid)) { \
err = EPERM; \
goto label; \
} \
} while (0)
#define SHARD_STACK_UNWIND(fop, frame, params ...) do { \
shard_local_t *__local = NULL; \
if (frame) { \
__local = frame->local; \
frame->local = NULL; \
} \
STACK_UNWIND_STRICT (fop, frame, params); \
if (__local) { \
shard_local_wipe (__local); \
mem_put (__local); \
} \
} while (0) \
typedef struct shard_priv {
uint64_t block_size;
uuid_t dot_shard_gfid;
inode_t *dot_shard_inode;
} shard_priv_t;
typedef struct {
loc_t *loc;
short type;
char *domain;
} shard_lock_t;
typedef struct shard_local {
int op_ret;
int op_errno;
int first_block;
int last_block;
int num_blocks;
int call_count;
int eexist_count;
int xflag;
int count;
uint32_t flags;
uint64_t block_size;
off_t offset;
size_t total_size;
size_t written_size;
loc_t loc;
loc_t dot_shard_loc;
fd_t *fd;
dict_t *xattr_req;
dict_t *xattr_rsp;
inode_t **inode_list;
struct iovec *vector;
struct iobref *iobref;
struct {
int lock_count;
fop_inodelk_cbk_t inodelk_cbk;
shard_lock_t *shard_lock;
} lock;
} shard_local_t;
typedef struct shard_inode_ctx {
uint32_t rdev;
uint64_t block_size; /* The block size with which this inode is
sharded */
mode_t mode;
} shard_inode_ctx_t;
#endif /* __SHARD_H__ */
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