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/*
Copyright (c) 2008-2009 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 _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#ifndef _DHT_H
#define _DHT_H
#define GF_DHT_LOOKUP_UNHASHED_ON 1
#define GF_DHT_LOOKUP_UNHASHED_AUTO 2
typedef int (*dht_selfheal_dir_cbk_t) (call_frame_t *frame, void *cookie,
xlator_t *this,
int32_t op_ret, int32_t op_errno);
struct dht_layout {
int cnt;
int preset;
int gen;
int type;
int ref; /* use with dht_conf_t->layout_lock */
int search_unhashed;
struct {
int err; /* 0 = normal
-1 = dir exists and no xattr
>0 = dir lookup failed with errno
*/
uint32_t start;
uint32_t stop;
xlator_t *xlator;
} list[0];
};
typedef struct dht_layout dht_layout_t;
typedef enum {
DHT_HASH_TYPE_DM,
} dht_hashfn_type_t;
struct dht_local {
int call_cnt;
loc_t loc;
loc_t loc2;
int op_ret;
int op_errno;
int layout_mismatch;
/* Use stbuf as the postbuf, when we require both
* pre and post attrs */
struct iatt stbuf;
struct iatt prebuf;
struct iatt preoldparent;
struct iatt postoldparent;
struct iatt preparent;
struct iatt postparent;
struct statvfs statvfs;
fd_t *fd;
inode_t *inode;
dict_t *xattr;
dict_t *xattr_req;
dht_layout_t *layout;
size_t size;
ino_t ia_ino;
ino_t ia_gen;
xlator_t *src_hashed, *src_cached;
xlator_t *dst_hashed, *dst_cached;
xlator_t *cached_subvol;
xlator_t *hashed_subvol;
char need_selfheal;
int file_count;
int dir_count;
call_frame_t *main_frame;
struct {
fop_mknod_cbk_t linkfile_cbk;
struct iatt stbuf;
loc_t loc;
inode_t *inode;
dict_t *xattr;
xlator_t *srcvol;
} linkfile;
struct {
uint32_t hole_cnt;
uint32_t overlaps_cnt;
uint32_t missing;
uint32_t down;
uint32_t misc;
dht_selfheal_dir_cbk_t dir_cbk;
dht_layout_t *layout;
} selfheal;
uint32_t uid;
uint32_t gid;
/* needed by nufa */
int32_t flags;
mode_t mode;
dev_t rdev;
};
typedef struct dht_local dht_local_t;
/* du - disk-usage */
struct dht_du {
double avail_percent;
uint64_t avail_space;
uint32_t log;
};
typedef struct dht_du dht_du_t;
struct dht_conf {
gf_lock_t subvolume_lock;
int subvolume_cnt;
xlator_t **subvolumes;
char *subvolume_status;
dht_layout_t **file_layouts;
dht_layout_t **dir_layouts;
dht_layout_t *default_dir_layout;
gf_boolean_t search_unhashed;
int gen;
dht_du_t *du_stats;
uint64_t min_free_disk;
char disk_unit;
int32_t refresh_interval;
gf_boolean_t unhashed_sticky_bit;
struct timeval last_stat_fetch;
gf_lock_t layout_lock;
void *private; /* Can be used by wrapper xlators over
dht */
};
typedef struct dht_conf dht_conf_t;
struct dht_disk_layout {
uint32_t cnt;
uint32_t type;
struct {
uint32_t start;
uint32_t stop;
} list[1];
};
typedef struct dht_disk_layout dht_disk_layout_t;
#define WIPE(statp) do { typeof(*statp) z = {0,}; if (statp) *statp = z; } while (0)
#define ENTRY_MISSING(op_ret, op_errno) (op_ret == -1 && op_errno == ENOENT)
#define is_fs_root(loc) (strcmp (loc->path, "/") == 0)
#define is_revalidate(loc) (inode_ctx_get (loc->inode, this, NULL) == 0)
#define is_last_call(cnt) (cnt == 0)
#define DHT_LINKFILE_MODE (S_ISVTX)
#define check_is_linkfile(i,s,x) ( \
((st_mode_from_ia (s->ia_prot, s->ia_type) & ~S_IFMT) \
== DHT_LINKFILE_MODE) && \
(s->ia_size == 0))
#define check_is_dir(i,s,x) (IA_ISDIR(s->ia_type))
#define layout_is_sane(layout) ((layout) && (layout->cnt > 0))
#define DHT_STACK_UNWIND(fop, frame, params ...) do { \
dht_local_t *__local = NULL; \
xlator_t *__xl = NULL; \
__xl = frame->this; \
__local = frame->local; \
frame->local = NULL; \
STACK_UNWIND_STRICT (fop, frame, params); \
dht_local_wipe (__xl, __local); \
} while (0)
#define DHT_STACK_DESTROY(frame) do { \
dht_local_t *__local = NULL; \
xlator_t *__xl = NULL; \
__xl = frame->this; \
__local = frame->local; \
frame->local = NULL; \
STACK_DESTROY (frame->root); \
dht_local_wipe (__xl, __local); \
} while (0)
dht_layout_t *dht_layout_new (xlator_t *this, int cnt);
dht_layout_t *dht_layout_get (xlator_t *this, inode_t *inode);
dht_layout_t *dht_layout_for_subvol (xlator_t *this, xlator_t *subvol);
xlator_t *dht_layout_search (xlator_t *this, dht_layout_t *layout,
const char *name);
int dht_layout_normalize (xlator_t *this, loc_t *loc, dht_layout_t *layout);
int dht_layout_anomalies (xlator_t *this, loc_t *loc, dht_layout_t *layout,
uint32_t *holes_p, uint32_t *overlaps_p,
uint32_t *missing_p, uint32_t *down_p,
uint32_t *misc_p);
int dht_layout_dir_mismatch (xlator_t *this, dht_layout_t *layout,
xlator_t *subvol, loc_t *loc, dict_t *xattr);
xlator_t *dht_linkfile_subvol (xlator_t *this, inode_t *inode,
struct iatt *buf, dict_t *xattr);
int dht_linkfile_unlink (call_frame_t *frame, xlator_t *this,
xlator_t *subvol, loc_t *loc);
int dht_layouts_init (xlator_t *this, dht_conf_t *conf);
int dht_layout_merge (xlator_t *this, dht_layout_t *layout, xlator_t *subvol,
int op_ret, int op_errno, dict_t *xattr);
int dht_disk_layout_extract (xlator_t *this, dht_layout_t *layout,
int pos, int32_t **disk_layout_p);
int dht_disk_layout_merge (xlator_t *this, dht_layout_t *layout,
int pos, void *disk_layout_raw);
int dht_frame_return (call_frame_t *frame);
int dht_itransform (xlator_t *this, xlator_t *subvol, uint64_t x, uint64_t *y);
int dht_deitransform (xlator_t *this, uint64_t y, xlator_t **subvol,
uint64_t *x);
void dht_local_wipe (xlator_t *this, dht_local_t *local);
dht_local_t *dht_local_init (call_frame_t *frame);
int dht_iatt_merge (xlator_t *this, struct iatt *to, struct iatt *from,
xlator_t *subvol);
xlator_t *dht_subvol_get_hashed (xlator_t *this, loc_t *loc);
xlator_t *dht_subvol_get_cached (xlator_t *this, inode_t *inode);
xlator_t *dht_subvol_next (xlator_t *this, xlator_t *prev);
int dht_subvol_cnt (xlator_t *this, xlator_t *subvol);
int dht_hash_compute (int type, const char *name, uint32_t *hash_p);
int dht_linkfile_create (call_frame_t *frame, fop_mknod_cbk_t linkfile_cbk,
xlator_t *tovol, xlator_t *fromvol, loc_t *loc);
int dht_lookup_directory (call_frame_t *frame, xlator_t *this, loc_t *loc);
int dht_lookup_everywhere (call_frame_t *frame, xlator_t *this, loc_t *loc);
int
dht_selfheal_directory (call_frame_t *frame, dht_selfheal_dir_cbk_t cbk,
loc_t *loc, dht_layout_t *layout);
int
dht_selfheal_new_directory (call_frame_t *frame, dht_selfheal_dir_cbk_t cbk,
dht_layout_t *layout);
int
dht_selfheal_restore (call_frame_t *frame, dht_selfheal_dir_cbk_t cbk,
loc_t *loc, dht_layout_t *layout);
int
dht_layout_sort_volname (dht_layout_t *layout);
int dht_rename (call_frame_t *frame, xlator_t *this,
loc_t *oldloc, loc_t *newloc);
int dht_get_du_info (call_frame_t *frame, xlator_t *this, loc_t *loc);
int dht_is_subvol_filled (xlator_t *this, xlator_t *subvol);
xlator_t *dht_free_disk_available_subvol (xlator_t *this, xlator_t *subvol);
int dht_get_du_info_for_subvol (xlator_t *this, int subvol_idx);
int dht_layout_preset (xlator_t *this, xlator_t *subvol, inode_t *inode);
int dht_layout_set (xlator_t *this, inode_t *inode, dht_layout_t *layout);
void dht_layout_unref (xlator_t *this, dht_layout_t *layout);
dht_layout_t *dht_layout_ref (xlator_t *this, dht_layout_t *layout);
xlator_t *dht_first_up_subvol (xlator_t *this);
xlator_t *dht_last_up_subvol (xlator_t *this);
int dht_frame_su_do (call_frame_t *frame);
int dht_frame_su_undo (call_frame_t *frame);
int dht_build_child_loc (xlator_t *this, loc_t *child, loc_t *parent, char *name);
#endif /* _DHT_H */
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