+++ /dev/null
-/* NTDB tools to create various canned database layouts. */
-#include "layout.h"
-#include <stdlib.h>
-#include <string.h>
-#include <assert.h>
-#include <ccan/err/err.h>
-#include "logging.h"
-
-struct ntdb_layout *new_ntdb_layout(void)
-{
- struct ntdb_layout *layout = malloc(sizeof(*layout));
- layout->num_elems = 0;
- layout->elem = NULL;
- return layout;
-}
-
-static void add(struct ntdb_layout *layout, union ntdb_layout_elem elem)
-{
- layout->elem = realloc(layout->elem,
- sizeof(layout->elem[0])
- * (layout->num_elems+1));
- layout->elem[layout->num_elems++] = elem;
-}
-
-void ntdb_layout_add_freetable(struct ntdb_layout *layout)
-{
- union ntdb_layout_elem elem;
- elem.base.type = FREETABLE;
- add(layout, elem);
-}
-
-void ntdb_layout_add_free(struct ntdb_layout *layout, ntdb_len_t len,
- unsigned ftable)
-{
- union ntdb_layout_elem elem;
- elem.base.type = FREE;
- elem.free.len = len;
- elem.free.ftable_num = ftable;
- add(layout, elem);
-}
-
-void ntdb_layout_add_capability(struct ntdb_layout *layout,
- uint64_t type,
- bool write_breaks,
- bool check_breaks,
- bool open_breaks,
- ntdb_len_t extra)
-{
- union ntdb_layout_elem elem;
- elem.base.type = CAPABILITY;
- elem.capability.type = type;
- if (write_breaks)
- elem.capability.type |= NTDB_CAP_NOWRITE;
- if (open_breaks)
- elem.capability.type |= NTDB_CAP_NOOPEN;
- if (check_breaks)
- elem.capability.type |= NTDB_CAP_NOCHECK;
- elem.capability.extra = extra;
- add(layout, elem);
-}
-
-static NTDB_DATA dup_key(NTDB_DATA key)
-{
- NTDB_DATA ret;
- ret.dsize = key.dsize;
- ret.dptr = malloc(ret.dsize);
- memcpy(ret.dptr, key.dptr, ret.dsize);
- return ret;
-}
-
-void ntdb_layout_add_used(struct ntdb_layout *layout,
- NTDB_DATA key, NTDB_DATA data,
- ntdb_len_t extra)
-{
- union ntdb_layout_elem elem;
- elem.base.type = DATA;
- elem.used.key = dup_key(key);
- elem.used.data = dup_key(data);
- elem.used.extra = extra;
- add(layout, elem);
-}
-
-static ntdb_len_t free_record_len(ntdb_len_t len)
-{
- return sizeof(struct ntdb_used_record) + len;
-}
-
-static ntdb_len_t data_record_len(struct tle_used *used)
-{
- ntdb_len_t len;
- len = sizeof(struct ntdb_used_record)
- + used->key.dsize + used->data.dsize + used->extra;
- assert(len >= sizeof(struct ntdb_free_record));
- return len;
-}
-
-static ntdb_len_t capability_len(struct tle_capability *cap)
-{
- return sizeof(struct ntdb_capability) + cap->extra;
-}
-
-static ntdb_len_t freetable_len(struct tle_freetable *ftable)
-{
- return sizeof(struct ntdb_freetable);
-}
-
-static void set_free_record(void *mem, ntdb_len_t len)
-{
- /* We do all the work in add_to_freetable */
-}
-
-static void add_zero_pad(struct ntdb_used_record *u, size_t len, size_t extra)
-{
- if (extra)
- ((char *)(u + 1))[len] = '\0';
-}
-
-static void set_data_record(void *mem, struct ntdb_context *ntdb,
- struct tle_used *used)
-{
- struct ntdb_used_record *u = mem;
-
- set_header(ntdb, u, NTDB_USED_MAGIC, used->key.dsize, used->data.dsize,
- used->key.dsize + used->data.dsize + used->extra);
- memcpy(u + 1, used->key.dptr, used->key.dsize);
- memcpy((char *)(u + 1) + used->key.dsize,
- used->data.dptr, used->data.dsize);
- add_zero_pad(u, used->key.dsize + used->data.dsize, used->extra);
-}
-
-static void set_capability(void *mem, struct ntdb_context *ntdb,
- struct tle_capability *cap, struct ntdb_header *hdr,
- ntdb_off_t last_cap)
-{
- struct ntdb_capability *c = mem;
- ntdb_len_t len = sizeof(*c) - sizeof(struct ntdb_used_record) + cap->extra;
-
- c->type = cap->type;
- c->next = 0;
- set_header(ntdb, &c->hdr, NTDB_CAP_MAGIC, 0, len, len);
-
- /* Append to capability list. */
- if (!last_cap) {
- hdr->capabilities = cap->base.off;
- } else {
- c = (struct ntdb_capability *)((char *)hdr + last_cap);
- c->next = cap->base.off;
- }
-}
-
-static void set_freetable(void *mem, struct ntdb_context *ntdb,
- struct tle_freetable *freetable, struct ntdb_header *hdr,
- ntdb_off_t last_ftable)
-{
- struct ntdb_freetable *ftable = mem;
- memset(ftable, 0, sizeof(*ftable));
- set_header(ntdb, &ftable->hdr, NTDB_FTABLE_MAGIC, 0,
- sizeof(*ftable) - sizeof(ftable->hdr),
- sizeof(*ftable) - sizeof(ftable->hdr));
-
- if (last_ftable) {
- ftable = (struct ntdb_freetable *)((char *)hdr + last_ftable);
- ftable->next = freetable->base.off;
- } else {
- hdr->free_table = freetable->base.off;
- }
-}
-
-static void add_to_freetable(struct ntdb_context *ntdb,
- ntdb_off_t eoff,
- ntdb_off_t elen,
- unsigned ftable,
- struct tle_freetable *freetable)
-{
- ntdb->ftable_off = freetable->base.off;
- ntdb->ftable = ftable;
- add_free_record(ntdb, eoff, sizeof(struct ntdb_used_record) + elen,
- NTDB_LOCK_WAIT, false);
-}
-
-static ntdb_off_t hbucket_offset(ntdb_len_t idx)
-{
- return sizeof(struct ntdb_header) + sizeof(struct ntdb_used_record)
- + idx * sizeof(ntdb_off_t);
-}
-
-/* FIXME: Our hash table handling here is primitive: we don't expand! */
-static void add_to_hashtable(struct ntdb_context *ntdb,
- ntdb_off_t eoff,
- NTDB_DATA key)
-{
- ntdb_off_t b_off;
- uint32_t h = ntdb_hash(ntdb, key.dptr, key.dsize);
-
- b_off = hbucket_offset(h & ((1 << ntdb->hash_bits)-1));
- if (ntdb_read_off(ntdb, b_off) != 0)
- abort();
-
- ntdb_write_off(ntdb, b_off, encode_offset(ntdb, eoff, h));
-}
-
-static struct tle_freetable *find_ftable(struct ntdb_layout *layout, unsigned num)
-{
- unsigned i;
-
- for (i = 0; i < layout->num_elems; i++) {
- if (layout->elem[i].base.type != FREETABLE)
- continue;
- if (num == 0)
- return &layout->elem[i].ftable;
- num--;
- }
- abort();
-}
-
-/* FIXME: Support NTDB_CONVERT */
-struct ntdb_context *ntdb_layout_get(struct ntdb_layout *layout,
- void (*freefn)(void *),
- union ntdb_attribute *attr)
-{
- unsigned int i;
- ntdb_off_t off, hdrlen, len, last_ftable, last_cap;
- char *mem;
- struct ntdb_context *ntdb;
-
- /* Now populate our header, cribbing from a real NTDB header. */
- ntdb = ntdb_open("layout", NTDB_INTERNAL, O_RDWR, 0, attr);
-
- off = sizeof(struct ntdb_header) + sizeof(struct ntdb_used_record)
- + (sizeof(ntdb_off_t) << ntdb->hash_bits);
- hdrlen = off;
-
- /* First pass of layout: calc lengths */
- for (i = 0; i < layout->num_elems; i++) {
- union ntdb_layout_elem *e = &layout->elem[i];
- e->base.off = off;
- switch (e->base.type) {
- case FREETABLE:
- len = freetable_len(&e->ftable);
- break;
- case FREE:
- len = free_record_len(e->free.len);
- break;
- case DATA:
- len = data_record_len(&e->used);
- break;
- case CAPABILITY:
- len = capability_len(&e->capability);
- break;
- default:
- abort();
- }
- off += len;
- }
-
- mem = malloc(off);
- /* Fill with some weird pattern. */
- memset(mem, 0x99, off);
- memcpy(mem, ntdb->file->map_ptr, hdrlen);
-
- /* Mug the ntdb we have to make it use this. */
- freefn(ntdb->file->map_ptr);
- ntdb->file->map_ptr = mem;
- ntdb->file->map_size = off;
-
- last_ftable = 0;
- last_cap = 0;
- for (i = 0; i < layout->num_elems; i++) {
- union ntdb_layout_elem *e = &layout->elem[i];
- switch (e->base.type) {
- case FREETABLE:
- set_freetable(mem + e->base.off, ntdb, &e->ftable,
- (struct ntdb_header *)mem, last_ftable);
- last_ftable = e->base.off;
- break;
- case FREE:
- set_free_record(mem + e->base.off, e->free.len);
- break;
- case DATA:
- set_data_record(mem + e->base.off, ntdb, &e->used);
- break;
- case CAPABILITY:
- set_capability(mem + e->base.off, ntdb, &e->capability,
- (struct ntdb_header *)mem, last_cap);
- last_cap = e->base.off;
- break;
- }
- }
- /* Must have a free table! */
- assert(last_ftable);
-
- /* Now fill the free and hash tables. */
- for (i = 0; i < layout->num_elems; i++) {
- union ntdb_layout_elem *e = &layout->elem[i];
- switch (e->base.type) {
- case FREE:
- add_to_freetable(ntdb, e->base.off, e->free.len,
- e->free.ftable_num,
- find_ftable(layout, e->free.ftable_num));
- break;
- case DATA:
- add_to_hashtable(ntdb, e->base.off, e->used.key);
- break;
- default:
- break;
- }
- }
-
- ntdb->ftable_off = find_ftable(layout, 0)->base.off;
- return ntdb;
-}
-
-void ntdb_layout_write(struct ntdb_layout *layout, void (*freefn)(void *),
- union ntdb_attribute *attr, const char *filename)
-{
- struct ntdb_context *ntdb = ntdb_layout_get(layout, freefn, attr);
- int fd;
-
- fd = open(filename, O_WRONLY|O_TRUNC|O_CREAT, 0600);
- if (fd < 0)
- err(1, "opening %s for writing", filename);
- if (write(fd, ntdb->file->map_ptr, ntdb->file->map_size)
- != ntdb->file->map_size)
- err(1, "writing %s", filename);
- close(fd);
- ntdb_close(ntdb);
-}
-
-void ntdb_layout_free(struct ntdb_layout *layout)
-{
- unsigned int i;
-
- for (i = 0; i < layout->num_elems; i++) {
- if (layout->elem[i].base.type == DATA) {
- free(layout->elem[i].used.key.dptr);
- free(layout->elem[i].used.data.dptr);
- }
- }
- free(layout->elem);
- free(layout);
-}
projects / ccan / blobdiff