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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 _STRIPE_H_
#define _STRIPE_H_
#include "xlator.h"
#include "logging.h"
#include "defaults.h"
#include "common-utils.h"
#include "compat.h"
#include "compat-errno.h"
#include "stripe-mem-types.h"
#include "libxlator.h"
#include <fnmatch.h>
#include <signal.h>
#define STRIPE_PATHINFO_HEADER "STRIPE:"
#define STRIPE_MIN_BLOCK_SIZE (16 * GF_UNIT_KB)
#define STRIPE_STACK_UNWIND(fop, frame, params...) \
do { \
stripe_local_t *__local = NULL; \
if (frame) { \
__local = frame->local; \
frame->local = NULL; \
} \
STACK_UNWIND_STRICT(fop, frame, params); \
if (__local) { \
stripe_local_wipe(__local); \
mem_put(__local); \
} \
} while (0)
#define STRIPE_STACK_DESTROY(frame) \
do { \
stripe_local_t *__local = NULL; \
__local = frame->local; \
frame->local = NULL; \
STACK_DESTROY(frame->root); \
if (__local) { \
stripe_local_wipe(__local); \
mem_put(__local); \
} \
} while (0)
#define STRIPE_VALIDATE_FCTX(fctx, label) \
do { \
int idx = 0; \
if (!fctx) { \
op_errno = EINVAL; \
goto label; \
} \
for (idx = 0; idx < fctx->stripe_count; idx++) { \
if (!fctx->xl_array[idx]) { \
gf_log(this->name, GF_LOG_ERROR, "fctx->xl_array[%d] is NULL", \
idx); \
op_errno = ESTALE; \
goto label; \
} \
} \
} while (0)
typedef struct stripe_xattr_sort {
int pos;
int xattr_len;
char *xattr_value;
} stripe_xattr_sort_t;
/**
* struct stripe_options : This keeps the pattern and the block-size
* information, which is used for striping on a file.
*/
struct stripe_options {
struct stripe_options *next;
char path_pattern[256];
uint64_t block_size;
};
/**
* Private structure for stripe translator
*/
struct stripe_private {
struct stripe_options *pattern;
xlator_t **xl_array;
uint64_t block_size;
gf_lock_t lock;
uint8_t nodes_down;
int8_t first_child_down;
int *last_event;
int8_t child_count;
gf_boolean_t xattr_supported; /* default yes */
gf_boolean_t coalesce;
char vol_uuid[UUID_SIZE + 1];
};
/**
* Used to keep info about the replies received from readv/writev calls
*/
struct stripe_replies {
struct iovec *vector;
int32_t count; // count of vector
int32_t op_ret; // op_ret of readv
int32_t op_errno;
int32_t requested_size;
struct iatt stbuf; /* 'stbuf' is also a part of reply */
};
typedef struct _stripe_fd_ctx {
off_t stripe_size;
int stripe_count;
int stripe_coalesce;
int static_array;
xlator_t **xl_array;
} stripe_fd_ctx_t;
/**
* Local structure to be passed with all the frames in case of STACK_WIND
*/
struct stripe_local; /* this itself is used inside the structure; */
struct stripe_local {
struct stripe_local *next;
call_frame_t *orig_frame;
stripe_fd_ctx_t *fctx;
/* Used by _cbk functions */
struct iatt stbuf;
struct iatt pre_buf;
struct iatt post_buf;
struct iatt preparent;
struct iatt postparent;
off_t stbuf_size;
off_t prebuf_size;
off_t postbuf_size;
off_t preparent_size;
off_t postparent_size;
blkcnt_t stbuf_blocks;
blkcnt_t prebuf_blocks;
blkcnt_t postbuf_blocks;
blkcnt_t preparent_blocks;
blkcnt_t postparent_blocks;
struct stripe_replies *replies;
struct statvfs statvfs_buf;
dir_entry_t *entry;
int8_t revalidate;
int8_t failed;
int8_t unwind;
size_t readv_size;
int32_t entry_count;
int32_t node_index;
int32_t call_count;
int32_t wind_count; /* used instead of child_cound
in case of read and write */
int32_t op_ret;
int32_t op_errno;
int32_t count;
int32_t flags;
char *name;
inode_t *inode;
loc_t loc;
loc_t loc2;
mode_t mode;
dev_t rdev;
/* For File I/O fops */
dict_t *xdata;
stripe_xattr_sort_t *xattr_list;
int32_t xattr_total_len;
int32_t nallocs;
char xsel[256];
/* General usage */
off_t offset;
off_t stripe_size;
int xattr_self_heal_needed;
int entry_self_heal_needed;
int8_t *list;
struct gf_flock lock;
fd_t *fd;
void *value;
struct iobref *iobref;
gf_dirent_t entries;
gf_dirent_t *dirent;
dict_t *xattr;
uuid_t ia_gfid;
int xflag;
mode_t umask;
};
typedef struct stripe_local stripe_local_t;
typedef struct stripe_private stripe_private_t;
/*
* Determine the stripe index of a particular frame based on the translator.
*/
static inline int32_t
stripe_get_frame_index(stripe_fd_ctx_t *fctx, call_frame_t *prev)
{
int32_t i, idx = -1;
for (i = 0; i < fctx->stripe_count; i++) {
if (fctx->xl_array[i] == prev->this) {
idx = i;
break;
}
}
return idx;
}
static inline void
stripe_copy_xl_array(xlator_t **dst, xlator_t **src, int count)
{
int i;
for (i = 0; i < count; i++)
dst[i] = src[i];
}
void
stripe_local_wipe(stripe_local_t *local);
int32_t
stripe_ctx_handle(xlator_t *this, call_frame_t *prev, stripe_local_t *local,
dict_t *dict);
void
stripe_aggregate_xattr(dict_t *dst, dict_t *src);
int32_t
stripe_xattr_request_build(xlator_t *this, dict_t *dict, uint64_t stripe_size,
uint32_t stripe_count, uint32_t stripe_index,
uint32_t stripe_coalesce);
int32_t
stripe_get_matching_bs(const char *path, stripe_private_t *priv);
int
set_stripe_block_size(xlator_t *this, stripe_private_t *priv, char *data);
int32_t
stripe_iatt_merge(struct iatt *from, struct iatt *to);
int32_t
stripe_fill_pathinfo_xattr(xlator_t *this, stripe_local_t *local,
char **xattr_serz);
int32_t
stripe_free_xattr_str(stripe_local_t *local);
int32_t
stripe_xattr_aggregate(char *buffer, stripe_local_t *local, int32_t *total);
off_t
coalesced_offset(off_t offset, uint64_t stripe_size, int stripe_count);
off_t
uncoalesced_size(off_t size, uint64_t stripe_size, int stripe_count,
int stripe_index);
int32_t
stripe_fill_lockinfo_xattr(xlator_t *this, stripe_local_t *local,
void **xattr_serz);
/*
* Adjust the size attribute for files if coalesce is enabled.
*/
static inline void
correct_file_size(struct iatt *buf, stripe_fd_ctx_t *fctx, call_frame_t *prev)
{
int index;
if (!IA_ISREG(buf->ia_type))
return;
if (!fctx || !fctx->stripe_coalesce)
return;
index = stripe_get_frame_index(fctx, prev);
buf->ia_size = uncoalesced_size(buf->ia_size, fctx->stripe_size,
fctx->stripe_count, index);
}
#endif /* _STRIPE_H_ */
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