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-rw-r--r--xlators/cluster/dht/src/dht-common.h212
1 files changed, 212 insertions, 0 deletions
diff --git a/xlators/cluster/dht/src/dht-common.h b/xlators/cluster/dht/src/dht-common.h
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+++ b/xlators/cluster/dht/src/dht-common.h
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+/*
+ Copyright (c) 2008, 2009 Z RESEARCH, Inc. <http://www.zresearch.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
+
+
+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;
+ 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;
+
+
+struct dht_local {
+ int call_cnt;
+ loc_t loc;
+ loc_t loc2;
+ int op_ret;
+ int op_errno;
+ int layout_mismatch;
+ struct stat stbuf;
+ 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 st_ino;
+ xlator_t *src_hashed, *src_cached;
+ xlator_t *dst_hashed, *dst_cached;
+ xlator_t *cached_subvol;
+ xlator_t *hashed_subvol;
+ char need_selfheal;
+ struct {
+ fop_mknod_cbk_t linkfile_cbk;
+ struct stat 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;
+
+ /* needed by nufa */
+ int32_t flags;
+ mode_t mode;
+ dev_t rdev;
+};
+typedef struct dht_local dht_local_t;
+
+
+struct dht_conf {
+ gf_lock_t subvolume_lock;
+ int subvolume_cnt;
+ xlator_t **subvolumes;
+ xlator_t *local_volume; /* Needed by NUFA */
+ 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;
+};
+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 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) ((s->st_mode & ~S_IFMT) == DHT_LINKFILE_MODE)
+
+#define check_is_dir(i,s,x) (S_ISDIR(s->st_mode))
+
+#define layout_is_sane(layout) ((layout) && (layout->cnt > 0))
+
+#define DHT_STACK_UNWIND(frame, params ...) do { \
+ dht_local_t *__local = NULL; \
+ __local = frame->local; \
+ frame->local = NULL; \
+ STACK_UNWIND (frame, params); \
+ dht_local_wipe (__local); \
+ } while (0)
+
+#define DHT_STACK_DESTROY(frame) do { \
+ dht_local_t *__local = NULL; \
+ __local = frame->local; \
+ frame->local = NULL; \
+ STACK_DESTROY (frame->root); \
+ dht_local_wipe (__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 stat *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, int32_t *disk_layout);
+
+
+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 (dht_local_t *local);
+dht_local_t *dht_local_init (call_frame_t *frame);
+int dht_stat_merge (xlator_t *this, struct stat *to, struct stat *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_selfheal_directory (call_frame_t *frame, dht_selfheal_dir_cbk_t cbk,
+ loc_t *loc, 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_rename (call_frame_t *frame, xlator_t *this,
+ loc_t *oldloc, loc_t *newloc);
+#endif /* _DHT_H */