/* Copyright (c) 2008-2010 Gluster, Inc. This file is part of GlusterFS. GlusterFS is free software; you can redistribute it and/or modify it under the terms of the GNU Affero 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 Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program. If not, see . */ #ifndef _CONFIG_H #define _CONFIG_H #include "config.h" #endif #include "dht-mem-types.h" #include "libxlator.h" #include "syncop.h" #ifndef _DHT_H #define _DHT_H #define GF_XATTR_FIX_LAYOUT_KEY "trusted.distribute.fix.layout" #define GF_DHT_LOOKUP_UNHASHED_ON 1 #define GF_DHT_LOOKUP_UNHASHED_AUTO 2 #define DHT_PATHINFO_HEADER "DISTRIBUTE:" #include 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 spread_cnt; /* layout spread count per directory, is controlled by 'setxattr()' with special key */ 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 *params; dict_t *xattr; dict_t *xattr_req; dht_layout_t *layout; size_t size; ino_t ia_ino; 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; /* need for file-info */ char *pathinfo; char *key; char *newpath; /* gfid related */ uuid_t gfid; /*Marker Related*/ struct marker_str marker; /* flag used to make sure we need to return estale in {lookup,revalidate}_cbk */ char return_estale; /* rebalance related */ #define to_subvol hashed_subvol #define from_subvol cached_subvol }; 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; int *last_event; dht_layout_t **file_layouts; dht_layout_t **dir_layouts; 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 */ gf_boolean_t use_readdirp; char vol_uuid[UUID_SIZE + 1]; gf_boolean_t assert_no_child_down; time_t *subvol_up_time; /* This is the count used as the distribute layout for a directory */ /* Will be a global flag to control the layout spread count */ uint32_t dir_spread_cnt; struct syncenv *env; /* The env pointer to the rebalance synctask */ }; 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; \ if (frame) { \ __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_build_child_loc (xlator_t *this, loc_t *child, loc_t *parent, char *name); int dht_filter_loc_subvol_key (xlator_t *this, loc_t *loc, loc_t *new_loc, xlator_t **subvol); int dht_rename_cleanup (call_frame_t *frame); int dht_rename_links_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, inode_t *inode, struct iatt *stbuf, struct iatt *preparent, struct iatt *postparent); int dht_linkfile_recreate(call_frame_t *frame, fop_mknod_cbk_t linkfile_cbk, xlator_t *tovol, xlator_t *fromvol, loc_t *loc); int dht_fix_directory_layout (call_frame_t *frame, dht_selfheal_dir_cbk_t dir_cbk, dht_layout_t *layout); int dht_start_rebalance_task (xlator_t *this, call_frame_t *frame); #endif /* _DHT_H */