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Diffstat (limited to 'source4/lib/tdb/common/tdb_private.h')
| -rw-r--r-- | source4/lib/tdb/common/tdb_private.h | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/source4/lib/tdb/common/tdb_private.h b/source4/lib/tdb/common/tdb_private.h deleted file mode 100644 index ffac89ff0e..0000000000 --- a/source4/lib/tdb/common/tdb_private.h +++ /dev/null @@ -1,213 +0,0 @@ - /* - Unix SMB/CIFS implementation. - - trivial database library - private includes - - Copyright (C) Andrew Tridgell 2005 - - ** NOTE! The following LGPL license applies to the tdb - ** library. This does NOT imply that all of Samba is released - ** under the LGPL - - This library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 3 of the License, or (at your option) any later version. - - This library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with this library; if not, see <http://www.gnu.org/licenses/>. -*/ - -#include "replace.h" -#include "system/filesys.h" -#include "system/time.h" -#include "system/shmem.h" -#include "system/select.h" -#include "system/wait.h" -#include "tdb.h" - -#ifndef HAVE_GETPAGESIZE -#define getpagesize() 0x2000 -#endif - -typedef uint32_t tdb_len_t; -typedef uint32_t tdb_off_t; - -#ifndef offsetof -#define offsetof(t,f) ((unsigned int)&((t *)0)->f) -#endif - -#define TDB_MAGIC_FOOD "TDB file\n" -#define TDB_VERSION (0x26011967 + 6) -#define TDB_MAGIC (0x26011999U) -#define TDB_FREE_MAGIC (~TDB_MAGIC) -#define TDB_DEAD_MAGIC (0xFEE1DEAD) -#define TDB_RECOVERY_MAGIC (0xf53bc0e7U) -#define TDB_ALIGNMENT 4 -#define DEFAULT_HASH_SIZE 131 -#define FREELIST_TOP (sizeof(struct tdb_header)) -#define TDB_ALIGN(x,a) (((x) + (a)-1) & ~((a)-1)) -#define TDB_BYTEREV(x) (((((x)&0xff)<<24)|((x)&0xFF00)<<8)|(((x)>>8)&0xFF00)|((x)>>24)) -#define TDB_DEAD(r) ((r)->magic == TDB_DEAD_MAGIC) -#define TDB_BAD_MAGIC(r) ((r)->magic != TDB_MAGIC && !TDB_DEAD(r)) -#define TDB_HASH_TOP(hash) (FREELIST_TOP + (BUCKET(hash)+1)*sizeof(tdb_off_t)) -#define TDB_HASHTABLE_SIZE(tdb) ((tdb->header.hash_size+1)*sizeof(tdb_off_t)) -#define TDB_DATA_START(hash_size) (TDB_HASH_TOP(hash_size-1) + sizeof(tdb_off_t)) -#define TDB_RECOVERY_HEAD offsetof(struct tdb_header, recovery_start) -#define TDB_SEQNUM_OFS offsetof(struct tdb_header, sequence_number) -#define TDB_PAD_BYTE 0x42 -#define TDB_PAD_U32 0x42424242 - -/* NB assumes there is a local variable called "tdb" that is the - * current context, also takes doubly-parenthesized print-style - * argument. */ -#define TDB_LOG(x) tdb->log.log_fn x - -/* lock offsets */ -#define GLOBAL_LOCK 0 -#define ACTIVE_LOCK 4 -#define TRANSACTION_LOCK 8 - -/* free memory if the pointer is valid and zero the pointer */ -#ifndef SAFE_FREE -#define SAFE_FREE(x) do { if ((x) != NULL) {free(x); (x)=NULL;} } while(0) -#endif - -#define BUCKET(hash) ((hash) % tdb->header.hash_size) - -#define DOCONV() (tdb->flags & TDB_CONVERT) -#define CONVERT(x) (DOCONV() ? tdb_convert(&x, sizeof(x)) : &x) - - -/* the body of the database is made of one list_struct for the free space - plus a separate data list for each hash value */ -struct list_struct { - tdb_off_t next; /* offset of the next record in the list */ - tdb_len_t rec_len; /* total byte length of record */ - tdb_len_t key_len; /* byte length of key */ - tdb_len_t data_len; /* byte length of data */ - uint32_t full_hash; /* the full 32 bit hash of the key */ - uint32_t magic; /* try to catch errors */ - /* the following union is implied: - union { - char record[rec_len]; - struct { - char key[key_len]; - char data[data_len]; - } - uint32_t totalsize; (tailer) - } - */ -}; - - -/* this is stored at the front of every database */ -struct tdb_header { - char magic_food[32]; /* for /etc/magic */ - uint32_t version; /* version of the code */ - uint32_t hash_size; /* number of hash entries */ - tdb_off_t rwlocks; /* obsolete - kept to detect old formats */ - tdb_off_t recovery_start; /* offset of transaction recovery region */ - tdb_off_t sequence_number; /* used when TDB_SEQNUM is set */ - tdb_off_t reserved[29]; -}; - -struct tdb_lock_type { - int list; - uint32_t count; - uint32_t ltype; -}; - -struct tdb_traverse_lock { - struct tdb_traverse_lock *next; - uint32_t off; - uint32_t hash; - int lock_rw; -}; - - -struct tdb_methods { - int (*tdb_read)(struct tdb_context *, tdb_off_t , void *, tdb_len_t , int ); - int (*tdb_write)(struct tdb_context *, tdb_off_t, const void *, tdb_len_t); - void (*next_hash_chain)(struct tdb_context *, uint32_t *); - int (*tdb_oob)(struct tdb_context *, tdb_off_t , int ); - int (*tdb_expand_file)(struct tdb_context *, tdb_off_t , tdb_off_t ); - int (*tdb_brlock)(struct tdb_context *, tdb_off_t , int, int, int, size_t); -}; - -struct tdb_context { - char *name; /* the name of the database */ - void *map_ptr; /* where it is currently mapped */ - int fd; /* open file descriptor for the database */ - tdb_len_t map_size; /* how much space has been mapped */ - int read_only; /* opened read-only */ - int traverse_read; /* read-only traversal */ - int traverse_write; /* read-write traversal */ - struct tdb_lock_type global_lock; - int num_lockrecs; - struct tdb_lock_type *lockrecs; /* only real locks, all with count>0 */ - enum TDB_ERROR ecode; /* error code for last tdb error */ - struct tdb_header header; /* a cached copy of the header */ - uint32_t flags; /* the flags passed to tdb_open */ - struct tdb_traverse_lock travlocks; /* current traversal locks */ - struct tdb_context *next; /* all tdbs to avoid multiple opens */ - dev_t device; /* uniquely identifies this tdb */ - ino_t inode; /* uniquely identifies this tdb */ - struct tdb_logging_context log; - unsigned int (*hash_fn)(TDB_DATA *key); - int open_flags; /* flags used in the open - needed by reopen */ - unsigned int num_locks; /* number of chain locks held */ - const struct tdb_methods *methods; - struct tdb_transaction *transaction; - int page_size; - int max_dead_records; - bool have_transaction_lock; - volatile sig_atomic_t *interrupt_sig_ptr; -}; - - -/* - internal prototypes -*/ -int tdb_munmap(struct tdb_context *tdb); -void tdb_mmap(struct tdb_context *tdb); -int tdb_lock(struct tdb_context *tdb, int list, int ltype); -int tdb_lock_nonblock(struct tdb_context *tdb, int list, int ltype); -int tdb_unlock(struct tdb_context *tdb, int list, int ltype); -int tdb_brlock(struct tdb_context *tdb, tdb_off_t offset, int rw_type, int lck_type, int probe, size_t len); -int tdb_transaction_lock(struct tdb_context *tdb, int ltype); -int tdb_transaction_unlock(struct tdb_context *tdb); -int tdb_brlock_upgrade(struct tdb_context *tdb, tdb_off_t offset, size_t len); -int tdb_write_lock_record(struct tdb_context *tdb, tdb_off_t off); -int tdb_write_unlock_record(struct tdb_context *tdb, tdb_off_t off); -int tdb_ofs_read(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d); -int tdb_ofs_write(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d); -void *tdb_convert(void *buf, uint32_t size); -int tdb_free(struct tdb_context *tdb, tdb_off_t offset, struct list_struct *rec); -tdb_off_t tdb_allocate(struct tdb_context *tdb, tdb_len_t length, struct list_struct *rec); -int tdb_ofs_read(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d); -int tdb_ofs_write(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d); -int tdb_lock_record(struct tdb_context *tdb, tdb_off_t off); -int tdb_unlock_record(struct tdb_context *tdb, tdb_off_t off); -int tdb_rec_read(struct tdb_context *tdb, tdb_off_t offset, struct list_struct *rec); -int tdb_rec_write(struct tdb_context *tdb, tdb_off_t offset, struct list_struct *rec); -int tdb_do_delete(struct tdb_context *tdb, tdb_off_t rec_ptr, struct list_struct *rec); -unsigned char *tdb_alloc_read(struct tdb_context *tdb, tdb_off_t offset, tdb_len_t len); -int tdb_parse_data(struct tdb_context *tdb, TDB_DATA key, - tdb_off_t offset, tdb_len_t len, - int (*parser)(TDB_DATA key, TDB_DATA data, - void *private_data), - void *private_data); -tdb_off_t tdb_find_lock_hash(struct tdb_context *tdb, TDB_DATA key, uint32_t hash, int locktype, - struct list_struct *rec); -void tdb_io_init(struct tdb_context *tdb); -int tdb_expand(struct tdb_context *tdb, tdb_off_t size); -int tdb_rec_free_read(struct tdb_context *tdb, tdb_off_t off, - struct list_struct *rec); - - |