diff options
Diffstat (limited to 'xlators/cluster/dht/src/dht-common.h')
| -rw-r--r-- | xlators/cluster/dht/src/dht-common.h | 212 |
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 new file mode 100644 index 000000000..17017381b --- /dev/null +++ b/xlators/cluster/dht/src/dht-common.h @@ -0,0 +1,212 @@ +/* + 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 */ |