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![brian m. carlson](/assets/img/avatar_default.png)
Convert this struct to use a member of type object_id. Convert various static functions as well. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
1833 lines
47 KiB
C
1833 lines
47 KiB
C
#include "builtin.h"
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#include "config.h"
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#include "delta.h"
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#include "pack.h"
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#include "csum-file.h"
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#include "blob.h"
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#include "commit.h"
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#include "tag.h"
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#include "tree.h"
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#include "progress.h"
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#include "fsck.h"
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#include "exec_cmd.h"
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#include "streaming.h"
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#include "thread-utils.h"
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#include "packfile.h"
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static const char index_pack_usage[] =
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"git index-pack [-v] [-o <index-file>] [--keep | --keep=<msg>] [--verify] [--strict] (<pack-file> | --stdin [--fix-thin] [<pack-file>])";
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struct object_entry {
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struct pack_idx_entry idx;
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unsigned long size;
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unsigned char hdr_size;
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signed char type;
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signed char real_type;
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};
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struct object_stat {
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unsigned delta_depth;
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int base_object_no;
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};
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struct base_data {
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struct base_data *base;
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struct base_data *child;
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struct object_entry *obj;
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void *data;
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unsigned long size;
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int ref_first, ref_last;
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int ofs_first, ofs_last;
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};
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struct thread_local {
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#ifndef NO_PTHREADS
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pthread_t thread;
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#endif
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struct base_data *base_cache;
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size_t base_cache_used;
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int pack_fd;
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};
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#define FLAG_LINK (1u<<20)
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#define FLAG_CHECKED (1u<<21)
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struct ofs_delta_entry {
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off_t offset;
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int obj_no;
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};
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struct ref_delta_entry {
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struct object_id oid;
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int obj_no;
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};
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static struct object_entry *objects;
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static struct object_stat *obj_stat;
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static struct ofs_delta_entry *ofs_deltas;
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static struct ref_delta_entry *ref_deltas;
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static struct thread_local nothread_data;
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static int nr_objects;
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static int nr_ofs_deltas;
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static int nr_ref_deltas;
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static int ref_deltas_alloc;
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static int nr_resolved_deltas;
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static int nr_threads;
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static int from_stdin;
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static int strict;
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static int do_fsck_object;
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static struct fsck_options fsck_options = FSCK_OPTIONS_STRICT;
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static int verbose;
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static int show_resolving_progress;
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static int show_stat;
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static int check_self_contained_and_connected;
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static struct progress *progress;
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/* We always read in 4kB chunks. */
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static unsigned char input_buffer[4096];
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static unsigned int input_offset, input_len;
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static off_t consumed_bytes;
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static off_t max_input_size;
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static unsigned deepest_delta;
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static git_hash_ctx input_ctx;
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static uint32_t input_crc32;
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static int input_fd, output_fd;
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static const char *curr_pack;
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#ifndef NO_PTHREADS
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static struct thread_local *thread_data;
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static int nr_dispatched;
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static int threads_active;
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static pthread_mutex_t read_mutex;
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#define read_lock() lock_mutex(&read_mutex)
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#define read_unlock() unlock_mutex(&read_mutex)
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static pthread_mutex_t counter_mutex;
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#define counter_lock() lock_mutex(&counter_mutex)
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#define counter_unlock() unlock_mutex(&counter_mutex)
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static pthread_mutex_t work_mutex;
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#define work_lock() lock_mutex(&work_mutex)
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#define work_unlock() unlock_mutex(&work_mutex)
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static pthread_mutex_t deepest_delta_mutex;
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#define deepest_delta_lock() lock_mutex(&deepest_delta_mutex)
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#define deepest_delta_unlock() unlock_mutex(&deepest_delta_mutex)
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static pthread_mutex_t type_cas_mutex;
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#define type_cas_lock() lock_mutex(&type_cas_mutex)
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#define type_cas_unlock() unlock_mutex(&type_cas_mutex)
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static pthread_key_t key;
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static inline void lock_mutex(pthread_mutex_t *mutex)
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{
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if (threads_active)
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pthread_mutex_lock(mutex);
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}
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static inline void unlock_mutex(pthread_mutex_t *mutex)
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{
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if (threads_active)
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pthread_mutex_unlock(mutex);
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}
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/*
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* Mutex and conditional variable can't be statically-initialized on Windows.
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*/
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static void init_thread(void)
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{
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int i;
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init_recursive_mutex(&read_mutex);
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pthread_mutex_init(&counter_mutex, NULL);
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pthread_mutex_init(&work_mutex, NULL);
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pthread_mutex_init(&type_cas_mutex, NULL);
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if (show_stat)
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pthread_mutex_init(&deepest_delta_mutex, NULL);
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pthread_key_create(&key, NULL);
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thread_data = xcalloc(nr_threads, sizeof(*thread_data));
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for (i = 0; i < nr_threads; i++) {
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thread_data[i].pack_fd = open(curr_pack, O_RDONLY);
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if (thread_data[i].pack_fd == -1)
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die_errno(_("unable to open %s"), curr_pack);
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}
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threads_active = 1;
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}
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static void cleanup_thread(void)
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{
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int i;
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if (!threads_active)
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return;
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threads_active = 0;
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pthread_mutex_destroy(&read_mutex);
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pthread_mutex_destroy(&counter_mutex);
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pthread_mutex_destroy(&work_mutex);
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pthread_mutex_destroy(&type_cas_mutex);
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if (show_stat)
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pthread_mutex_destroy(&deepest_delta_mutex);
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for (i = 0; i < nr_threads; i++)
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close(thread_data[i].pack_fd);
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pthread_key_delete(key);
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free(thread_data);
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}
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#else
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#define read_lock()
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#define read_unlock()
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#define counter_lock()
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#define counter_unlock()
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#define work_lock()
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#define work_unlock()
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#define deepest_delta_lock()
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#define deepest_delta_unlock()
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#define type_cas_lock()
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#define type_cas_unlock()
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#endif
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static int mark_link(struct object *obj, int type, void *data, struct fsck_options *options)
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{
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if (!obj)
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return -1;
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if (type != OBJ_ANY && obj->type != type)
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die(_("object type mismatch at %s"), oid_to_hex(&obj->oid));
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obj->flags |= FLAG_LINK;
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return 0;
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}
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/* The content of each linked object must have been checked
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or it must be already present in the object database */
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static unsigned check_object(struct object *obj)
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{
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if (!obj)
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return 0;
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if (!(obj->flags & FLAG_LINK))
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return 0;
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if (!(obj->flags & FLAG_CHECKED)) {
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unsigned long size;
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int type = sha1_object_info(obj->oid.hash, &size);
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if (type <= 0)
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die(_("did not receive expected object %s"),
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oid_to_hex(&obj->oid));
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if (type != obj->type)
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die(_("object %s: expected type %s, found %s"),
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oid_to_hex(&obj->oid),
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type_name(obj->type), type_name(type));
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obj->flags |= FLAG_CHECKED;
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return 1;
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}
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return 0;
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}
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static unsigned check_objects(void)
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{
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unsigned i, max, foreign_nr = 0;
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max = get_max_object_index();
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for (i = 0; i < max; i++)
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foreign_nr += check_object(get_indexed_object(i));
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return foreign_nr;
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}
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/* Discard current buffer used content. */
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static void flush(void)
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{
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if (input_offset) {
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if (output_fd >= 0)
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write_or_die(output_fd, input_buffer, input_offset);
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the_hash_algo->update_fn(&input_ctx, input_buffer, input_offset);
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memmove(input_buffer, input_buffer + input_offset, input_len);
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input_offset = 0;
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}
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}
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/*
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* Make sure at least "min" bytes are available in the buffer, and
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* return the pointer to the buffer.
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*/
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static void *fill(int min)
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{
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if (min <= input_len)
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return input_buffer + input_offset;
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if (min > sizeof(input_buffer))
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die(Q_("cannot fill %d byte",
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"cannot fill %d bytes",
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min),
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min);
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flush();
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do {
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ssize_t ret = xread(input_fd, input_buffer + input_len,
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sizeof(input_buffer) - input_len);
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if (ret <= 0) {
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if (!ret)
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die(_("early EOF"));
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die_errno(_("read error on input"));
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}
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input_len += ret;
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if (from_stdin)
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display_throughput(progress, consumed_bytes + input_len);
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} while (input_len < min);
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return input_buffer;
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}
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static void use(int bytes)
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{
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if (bytes > input_len)
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die(_("used more bytes than were available"));
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input_crc32 = crc32(input_crc32, input_buffer + input_offset, bytes);
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input_len -= bytes;
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input_offset += bytes;
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/* make sure off_t is sufficiently large not to wrap */
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if (signed_add_overflows(consumed_bytes, bytes))
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die(_("pack too large for current definition of off_t"));
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consumed_bytes += bytes;
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if (max_input_size && consumed_bytes > max_input_size)
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die(_("pack exceeds maximum allowed size"));
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}
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static const char *open_pack_file(const char *pack_name)
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{
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if (from_stdin) {
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input_fd = 0;
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if (!pack_name) {
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struct strbuf tmp_file = STRBUF_INIT;
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output_fd = odb_mkstemp(&tmp_file,
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"pack/tmp_pack_XXXXXX");
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pack_name = strbuf_detach(&tmp_file, NULL);
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} else {
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output_fd = open(pack_name, O_CREAT|O_EXCL|O_RDWR, 0600);
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if (output_fd < 0)
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die_errno(_("unable to create '%s'"), pack_name);
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}
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nothread_data.pack_fd = output_fd;
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} else {
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input_fd = open(pack_name, O_RDONLY);
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if (input_fd < 0)
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die_errno(_("cannot open packfile '%s'"), pack_name);
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output_fd = -1;
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nothread_data.pack_fd = input_fd;
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}
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the_hash_algo->init_fn(&input_ctx);
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return pack_name;
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}
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static void parse_pack_header(void)
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{
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struct pack_header *hdr = fill(sizeof(struct pack_header));
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/* Header consistency check */
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if (hdr->hdr_signature != htonl(PACK_SIGNATURE))
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die(_("pack signature mismatch"));
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if (!pack_version_ok(hdr->hdr_version))
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die(_("pack version %"PRIu32" unsupported"),
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ntohl(hdr->hdr_version));
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nr_objects = ntohl(hdr->hdr_entries);
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use(sizeof(struct pack_header));
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}
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static NORETURN void bad_object(off_t offset, const char *format,
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...) __attribute__((format (printf, 2, 3)));
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static NORETURN void bad_object(off_t offset, const char *format, ...)
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{
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va_list params;
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char buf[1024];
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va_start(params, format);
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vsnprintf(buf, sizeof(buf), format, params);
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va_end(params);
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die(_("pack has bad object at offset %"PRIuMAX": %s"),
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(uintmax_t)offset, buf);
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}
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static inline struct thread_local *get_thread_data(void)
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{
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#ifndef NO_PTHREADS
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if (threads_active)
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return pthread_getspecific(key);
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assert(!threads_active &&
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"This should only be reached when all threads are gone");
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#endif
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return ¬hread_data;
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}
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#ifndef NO_PTHREADS
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static void set_thread_data(struct thread_local *data)
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{
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if (threads_active)
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pthread_setspecific(key, data);
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}
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#endif
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static struct base_data *alloc_base_data(void)
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{
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struct base_data *base = xcalloc(1, sizeof(struct base_data));
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base->ref_last = -1;
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base->ofs_last = -1;
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return base;
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}
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static void free_base_data(struct base_data *c)
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{
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if (c->data) {
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FREE_AND_NULL(c->data);
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get_thread_data()->base_cache_used -= c->size;
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}
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}
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static void prune_base_data(struct base_data *retain)
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{
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struct base_data *b;
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struct thread_local *data = get_thread_data();
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for (b = data->base_cache;
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data->base_cache_used > delta_base_cache_limit && b;
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b = b->child) {
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if (b->data && b != retain)
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free_base_data(b);
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}
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}
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static void link_base_data(struct base_data *base, struct base_data *c)
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{
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if (base)
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base->child = c;
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else
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get_thread_data()->base_cache = c;
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c->base = base;
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c->child = NULL;
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if (c->data)
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get_thread_data()->base_cache_used += c->size;
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prune_base_data(c);
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}
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static void unlink_base_data(struct base_data *c)
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{
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struct base_data *base = c->base;
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if (base)
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base->child = NULL;
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else
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get_thread_data()->base_cache = NULL;
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free_base_data(c);
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}
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static int is_delta_type(enum object_type type)
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{
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return (type == OBJ_REF_DELTA || type == OBJ_OFS_DELTA);
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}
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static void *unpack_entry_data(off_t offset, unsigned long size,
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enum object_type type, struct object_id *oid)
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{
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static char fixed_buf[8192];
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int status;
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git_zstream stream;
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void *buf;
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git_hash_ctx c;
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char hdr[32];
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int hdrlen;
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if (!is_delta_type(type)) {
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hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", type_name(type), size) + 1;
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the_hash_algo->init_fn(&c);
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the_hash_algo->update_fn(&c, hdr, hdrlen);
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} else
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oid = NULL;
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if (type == OBJ_BLOB && size > big_file_threshold)
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buf = fixed_buf;
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else
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buf = xmallocz(size);
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memset(&stream, 0, sizeof(stream));
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git_inflate_init(&stream);
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stream.next_out = buf;
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stream.avail_out = buf == fixed_buf ? sizeof(fixed_buf) : size;
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do {
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unsigned char *last_out = stream.next_out;
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stream.next_in = fill(1);
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stream.avail_in = input_len;
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status = git_inflate(&stream, 0);
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use(input_len - stream.avail_in);
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if (oid)
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the_hash_algo->update_fn(&c, last_out, stream.next_out - last_out);
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if (buf == fixed_buf) {
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stream.next_out = buf;
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stream.avail_out = sizeof(fixed_buf);
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}
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} while (status == Z_OK);
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if (stream.total_out != size || status != Z_STREAM_END)
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bad_object(offset, _("inflate returned %d"), status);
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git_inflate_end(&stream);
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if (oid)
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the_hash_algo->final_fn(oid->hash, &c);
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return buf == fixed_buf ? NULL : buf;
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}
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static void *unpack_raw_entry(struct object_entry *obj,
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off_t *ofs_offset,
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struct object_id *ref_oid,
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struct object_id *oid)
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{
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unsigned char *p;
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unsigned long size, c;
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off_t base_offset;
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unsigned shift;
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void *data;
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obj->idx.offset = consumed_bytes;
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input_crc32 = crc32(0, NULL, 0);
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p = fill(1);
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c = *p;
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use(1);
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obj->type = (c >> 4) & 7;
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size = (c & 15);
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shift = 4;
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while (c & 0x80) {
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p = fill(1);
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c = *p;
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use(1);
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size += (c & 0x7f) << shift;
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shift += 7;
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}
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obj->size = size;
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switch (obj->type) {
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case OBJ_REF_DELTA:
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hashcpy(ref_oid->hash, fill(the_hash_algo->rawsz));
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use(the_hash_algo->rawsz);
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break;
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case OBJ_OFS_DELTA:
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p = fill(1);
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c = *p;
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use(1);
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base_offset = c & 127;
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while (c & 128) {
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base_offset += 1;
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if (!base_offset || MSB(base_offset, 7))
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bad_object(obj->idx.offset, _("offset value overflow for delta base object"));
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p = fill(1);
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c = *p;
|
|
use(1);
|
|
base_offset = (base_offset << 7) + (c & 127);
|
|
}
|
|
*ofs_offset = obj->idx.offset - base_offset;
|
|
if (*ofs_offset <= 0 || *ofs_offset >= obj->idx.offset)
|
|
bad_object(obj->idx.offset, _("delta base offset is out of bound"));
|
|
break;
|
|
case OBJ_COMMIT:
|
|
case OBJ_TREE:
|
|
case OBJ_BLOB:
|
|
case OBJ_TAG:
|
|
break;
|
|
default:
|
|
bad_object(obj->idx.offset, _("unknown object type %d"), obj->type);
|
|
}
|
|
obj->hdr_size = consumed_bytes - obj->idx.offset;
|
|
|
|
data = unpack_entry_data(obj->idx.offset, obj->size, obj->type, oid);
|
|
obj->idx.crc32 = input_crc32;
|
|
return data;
|
|
}
|
|
|
|
static void *unpack_data(struct object_entry *obj,
|
|
int (*consume)(const unsigned char *, unsigned long, void *),
|
|
void *cb_data)
|
|
{
|
|
off_t from = obj[0].idx.offset + obj[0].hdr_size;
|
|
off_t len = obj[1].idx.offset - from;
|
|
unsigned char *data, *inbuf;
|
|
git_zstream stream;
|
|
int status;
|
|
|
|
data = xmallocz(consume ? 64*1024 : obj->size);
|
|
inbuf = xmalloc((len < 64*1024) ? (int)len : 64*1024);
|
|
|
|
memset(&stream, 0, sizeof(stream));
|
|
git_inflate_init(&stream);
|
|
stream.next_out = data;
|
|
stream.avail_out = consume ? 64*1024 : obj->size;
|
|
|
|
do {
|
|
ssize_t n = (len < 64*1024) ? (ssize_t)len : 64*1024;
|
|
n = xpread(get_thread_data()->pack_fd, inbuf, n, from);
|
|
if (n < 0)
|
|
die_errno(_("cannot pread pack file"));
|
|
if (!n)
|
|
die(Q_("premature end of pack file, %"PRIuMAX" byte missing",
|
|
"premature end of pack file, %"PRIuMAX" bytes missing",
|
|
(unsigned int)len),
|
|
(uintmax_t)len);
|
|
from += n;
|
|
len -= n;
|
|
stream.next_in = inbuf;
|
|
stream.avail_in = n;
|
|
if (!consume)
|
|
status = git_inflate(&stream, 0);
|
|
else {
|
|
do {
|
|
status = git_inflate(&stream, 0);
|
|
if (consume(data, stream.next_out - data, cb_data)) {
|
|
free(inbuf);
|
|
free(data);
|
|
return NULL;
|
|
}
|
|
stream.next_out = data;
|
|
stream.avail_out = 64*1024;
|
|
} while (status == Z_OK && stream.avail_in);
|
|
}
|
|
} while (len && status == Z_OK && !stream.avail_in);
|
|
|
|
/* This has been inflated OK when first encountered, so... */
|
|
if (status != Z_STREAM_END || stream.total_out != obj->size)
|
|
die(_("serious inflate inconsistency"));
|
|
|
|
git_inflate_end(&stream);
|
|
free(inbuf);
|
|
if (consume) {
|
|
FREE_AND_NULL(data);
|
|
}
|
|
return data;
|
|
}
|
|
|
|
static void *get_data_from_pack(struct object_entry *obj)
|
|
{
|
|
return unpack_data(obj, NULL, NULL);
|
|
}
|
|
|
|
static int compare_ofs_delta_bases(off_t offset1, off_t offset2,
|
|
enum object_type type1,
|
|
enum object_type type2)
|
|
{
|
|
int cmp = type1 - type2;
|
|
if (cmp)
|
|
return cmp;
|
|
return offset1 < offset2 ? -1 :
|
|
offset1 > offset2 ? 1 :
|
|
0;
|
|
}
|
|
|
|
static int find_ofs_delta(const off_t offset, enum object_type type)
|
|
{
|
|
int first = 0, last = nr_ofs_deltas;
|
|
|
|
while (first < last) {
|
|
int next = first + (last - first) / 2;
|
|
struct ofs_delta_entry *delta = &ofs_deltas[next];
|
|
int cmp;
|
|
|
|
cmp = compare_ofs_delta_bases(offset, delta->offset,
|
|
type, objects[delta->obj_no].type);
|
|
if (!cmp)
|
|
return next;
|
|
if (cmp < 0) {
|
|
last = next;
|
|
continue;
|
|
}
|
|
first = next+1;
|
|
}
|
|
return -first-1;
|
|
}
|
|
|
|
static void find_ofs_delta_children(off_t offset,
|
|
int *first_index, int *last_index,
|
|
enum object_type type)
|
|
{
|
|
int first = find_ofs_delta(offset, type);
|
|
int last = first;
|
|
int end = nr_ofs_deltas - 1;
|
|
|
|
if (first < 0) {
|
|
*first_index = 0;
|
|
*last_index = -1;
|
|
return;
|
|
}
|
|
while (first > 0 && ofs_deltas[first - 1].offset == offset)
|
|
--first;
|
|
while (last < end && ofs_deltas[last + 1].offset == offset)
|
|
++last;
|
|
*first_index = first;
|
|
*last_index = last;
|
|
}
|
|
|
|
static int compare_ref_delta_bases(const struct object_id *oid1,
|
|
const struct object_id *oid2,
|
|
enum object_type type1,
|
|
enum object_type type2)
|
|
{
|
|
int cmp = type1 - type2;
|
|
if (cmp)
|
|
return cmp;
|
|
return oidcmp(oid1, oid2);
|
|
}
|
|
|
|
static int find_ref_delta(const struct object_id *oid, enum object_type type)
|
|
{
|
|
int first = 0, last = nr_ref_deltas;
|
|
|
|
while (first < last) {
|
|
int next = first + (last - first) / 2;
|
|
struct ref_delta_entry *delta = &ref_deltas[next];
|
|
int cmp;
|
|
|
|
cmp = compare_ref_delta_bases(oid, &delta->oid,
|
|
type, objects[delta->obj_no].type);
|
|
if (!cmp)
|
|
return next;
|
|
if (cmp < 0) {
|
|
last = next;
|
|
continue;
|
|
}
|
|
first = next+1;
|
|
}
|
|
return -first-1;
|
|
}
|
|
|
|
static void find_ref_delta_children(const struct object_id *oid,
|
|
int *first_index, int *last_index,
|
|
enum object_type type)
|
|
{
|
|
int first = find_ref_delta(oid, type);
|
|
int last = first;
|
|
int end = nr_ref_deltas - 1;
|
|
|
|
if (first < 0) {
|
|
*first_index = 0;
|
|
*last_index = -1;
|
|
return;
|
|
}
|
|
while (first > 0 && !oidcmp(&ref_deltas[first - 1].oid, oid))
|
|
--first;
|
|
while (last < end && !oidcmp(&ref_deltas[last + 1].oid, oid))
|
|
++last;
|
|
*first_index = first;
|
|
*last_index = last;
|
|
}
|
|
|
|
struct compare_data {
|
|
struct object_entry *entry;
|
|
struct git_istream *st;
|
|
unsigned char *buf;
|
|
unsigned long buf_size;
|
|
};
|
|
|
|
static int compare_objects(const unsigned char *buf, unsigned long size,
|
|
void *cb_data)
|
|
{
|
|
struct compare_data *data = cb_data;
|
|
|
|
if (data->buf_size < size) {
|
|
free(data->buf);
|
|
data->buf = xmalloc(size);
|
|
data->buf_size = size;
|
|
}
|
|
|
|
while (size) {
|
|
ssize_t len = read_istream(data->st, data->buf, size);
|
|
if (len == 0)
|
|
die(_("SHA1 COLLISION FOUND WITH %s !"),
|
|
oid_to_hex(&data->entry->idx.oid));
|
|
if (len < 0)
|
|
die(_("unable to read %s"),
|
|
oid_to_hex(&data->entry->idx.oid));
|
|
if (memcmp(buf, data->buf, len))
|
|
die(_("SHA1 COLLISION FOUND WITH %s !"),
|
|
oid_to_hex(&data->entry->idx.oid));
|
|
size -= len;
|
|
buf += len;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int check_collison(struct object_entry *entry)
|
|
{
|
|
struct compare_data data;
|
|
enum object_type type;
|
|
unsigned long size;
|
|
|
|
if (entry->size <= big_file_threshold || entry->type != OBJ_BLOB)
|
|
return -1;
|
|
|
|
memset(&data, 0, sizeof(data));
|
|
data.entry = entry;
|
|
data.st = open_istream(entry->idx.oid.hash, &type, &size, NULL);
|
|
if (!data.st)
|
|
return -1;
|
|
if (size != entry->size || type != entry->type)
|
|
die(_("SHA1 COLLISION FOUND WITH %s !"),
|
|
oid_to_hex(&entry->idx.oid));
|
|
unpack_data(entry, compare_objects, &data);
|
|
close_istream(data.st);
|
|
free(data.buf);
|
|
return 0;
|
|
}
|
|
|
|
static void sha1_object(const void *data, struct object_entry *obj_entry,
|
|
unsigned long size, enum object_type type,
|
|
const struct object_id *oid)
|
|
{
|
|
void *new_data = NULL;
|
|
int collision_test_needed = 0;
|
|
|
|
assert(data || obj_entry);
|
|
|
|
if (startup_info->have_repository) {
|
|
read_lock();
|
|
collision_test_needed =
|
|
has_sha1_file_with_flags(oid->hash, OBJECT_INFO_QUICK);
|
|
read_unlock();
|
|
}
|
|
|
|
if (collision_test_needed && !data) {
|
|
read_lock();
|
|
if (!check_collison(obj_entry))
|
|
collision_test_needed = 0;
|
|
read_unlock();
|
|
}
|
|
if (collision_test_needed) {
|
|
void *has_data;
|
|
enum object_type has_type;
|
|
unsigned long has_size;
|
|
read_lock();
|
|
has_type = sha1_object_info(oid->hash, &has_size);
|
|
if (has_type < 0)
|
|
die(_("cannot read existing object info %s"), oid_to_hex(oid));
|
|
if (has_type != type || has_size != size)
|
|
die(_("SHA1 COLLISION FOUND WITH %s !"), oid_to_hex(oid));
|
|
has_data = read_sha1_file(oid->hash, &has_type, &has_size);
|
|
read_unlock();
|
|
if (!data)
|
|
data = new_data = get_data_from_pack(obj_entry);
|
|
if (!has_data)
|
|
die(_("cannot read existing object %s"), oid_to_hex(oid));
|
|
if (size != has_size || type != has_type ||
|
|
memcmp(data, has_data, size) != 0)
|
|
die(_("SHA1 COLLISION FOUND WITH %s !"), oid_to_hex(oid));
|
|
free(has_data);
|
|
}
|
|
|
|
if (strict) {
|
|
read_lock();
|
|
if (type == OBJ_BLOB) {
|
|
struct blob *blob = lookup_blob(oid);
|
|
if (blob)
|
|
blob->object.flags |= FLAG_CHECKED;
|
|
else
|
|
die(_("invalid blob object %s"), oid_to_hex(oid));
|
|
} else {
|
|
struct object *obj;
|
|
int eaten;
|
|
void *buf = (void *) data;
|
|
|
|
assert(data && "data can only be NULL for large _blobs_");
|
|
|
|
/*
|
|
* we do not need to free the memory here, as the
|
|
* buf is deleted by the caller.
|
|
*/
|
|
obj = parse_object_buffer(oid, type, size, buf,
|
|
&eaten);
|
|
if (!obj)
|
|
die(_("invalid %s"), type_name(type));
|
|
if (do_fsck_object &&
|
|
fsck_object(obj, buf, size, &fsck_options))
|
|
die(_("Error in object"));
|
|
if (fsck_walk(obj, NULL, &fsck_options))
|
|
die(_("Not all child objects of %s are reachable"), oid_to_hex(&obj->oid));
|
|
|
|
if (obj->type == OBJ_TREE) {
|
|
struct tree *item = (struct tree *) obj;
|
|
item->buffer = NULL;
|
|
obj->parsed = 0;
|
|
}
|
|
if (obj->type == OBJ_COMMIT) {
|
|
struct commit *commit = (struct commit *) obj;
|
|
if (detach_commit_buffer(commit, NULL) != data)
|
|
die("BUG: parse_object_buffer transmogrified our buffer");
|
|
}
|
|
obj->flags |= FLAG_CHECKED;
|
|
}
|
|
read_unlock();
|
|
}
|
|
|
|
free(new_data);
|
|
}
|
|
|
|
/*
|
|
* This function is part of find_unresolved_deltas(). There are two
|
|
* walkers going in the opposite ways.
|
|
*
|
|
* The first one in find_unresolved_deltas() traverses down from
|
|
* parent node to children, deflating nodes along the way. However,
|
|
* memory for deflated nodes is limited by delta_base_cache_limit, so
|
|
* at some point parent node's deflated content may be freed.
|
|
*
|
|
* The second walker is this function, which goes from current node up
|
|
* to top parent if necessary to deflate the node. In normal
|
|
* situation, its parent node would be already deflated, so it just
|
|
* needs to apply delta.
|
|
*
|
|
* In the worst case scenario, parent node is no longer deflated because
|
|
* we're running out of delta_base_cache_limit; we need to re-deflate
|
|
* parents, possibly up to the top base.
|
|
*
|
|
* All deflated objects here are subject to be freed if we exceed
|
|
* delta_base_cache_limit, just like in find_unresolved_deltas(), we
|
|
* just need to make sure the last node is not freed.
|
|
*/
|
|
static void *get_base_data(struct base_data *c)
|
|
{
|
|
if (!c->data) {
|
|
struct object_entry *obj = c->obj;
|
|
struct base_data **delta = NULL;
|
|
int delta_nr = 0, delta_alloc = 0;
|
|
|
|
while (is_delta_type(c->obj->type) && !c->data) {
|
|
ALLOC_GROW(delta, delta_nr + 1, delta_alloc);
|
|
delta[delta_nr++] = c;
|
|
c = c->base;
|
|
}
|
|
if (!delta_nr) {
|
|
c->data = get_data_from_pack(obj);
|
|
c->size = obj->size;
|
|
get_thread_data()->base_cache_used += c->size;
|
|
prune_base_data(c);
|
|
}
|
|
for (; delta_nr > 0; delta_nr--) {
|
|
void *base, *raw;
|
|
c = delta[delta_nr - 1];
|
|
obj = c->obj;
|
|
base = get_base_data(c->base);
|
|
raw = get_data_from_pack(obj);
|
|
c->data = patch_delta(
|
|
base, c->base->size,
|
|
raw, obj->size,
|
|
&c->size);
|
|
free(raw);
|
|
if (!c->data)
|
|
bad_object(obj->idx.offset, _("failed to apply delta"));
|
|
get_thread_data()->base_cache_used += c->size;
|
|
prune_base_data(c);
|
|
}
|
|
free(delta);
|
|
}
|
|
return c->data;
|
|
}
|
|
|
|
static void resolve_delta(struct object_entry *delta_obj,
|
|
struct base_data *base, struct base_data *result)
|
|
{
|
|
void *base_data, *delta_data;
|
|
|
|
if (show_stat) {
|
|
int i = delta_obj - objects;
|
|
int j = base->obj - objects;
|
|
obj_stat[i].delta_depth = obj_stat[j].delta_depth + 1;
|
|
deepest_delta_lock();
|
|
if (deepest_delta < obj_stat[i].delta_depth)
|
|
deepest_delta = obj_stat[i].delta_depth;
|
|
deepest_delta_unlock();
|
|
obj_stat[i].base_object_no = j;
|
|
}
|
|
delta_data = get_data_from_pack(delta_obj);
|
|
base_data = get_base_data(base);
|
|
result->obj = delta_obj;
|
|
result->data = patch_delta(base_data, base->size,
|
|
delta_data, delta_obj->size, &result->size);
|
|
free(delta_data);
|
|
if (!result->data)
|
|
bad_object(delta_obj->idx.offset, _("failed to apply delta"));
|
|
hash_object_file(result->data, result->size,
|
|
type_name(delta_obj->real_type), &delta_obj->idx.oid);
|
|
sha1_object(result->data, NULL, result->size, delta_obj->real_type,
|
|
&delta_obj->idx.oid);
|
|
counter_lock();
|
|
nr_resolved_deltas++;
|
|
counter_unlock();
|
|
}
|
|
|
|
/*
|
|
* Standard boolean compare-and-swap: atomically check whether "*type" is
|
|
* "want"; if so, swap in "set" and return true. Otherwise, leave it untouched
|
|
* and return false.
|
|
*/
|
|
static int compare_and_swap_type(signed char *type,
|
|
enum object_type want,
|
|
enum object_type set)
|
|
{
|
|
enum object_type old;
|
|
|
|
type_cas_lock();
|
|
old = *type;
|
|
if (old == want)
|
|
*type = set;
|
|
type_cas_unlock();
|
|
|
|
return old == want;
|
|
}
|
|
|
|
static struct base_data *find_unresolved_deltas_1(struct base_data *base,
|
|
struct base_data *prev_base)
|
|
{
|
|
if (base->ref_last == -1 && base->ofs_last == -1) {
|
|
find_ref_delta_children(&base->obj->idx.oid,
|
|
&base->ref_first, &base->ref_last,
|
|
OBJ_REF_DELTA);
|
|
|
|
find_ofs_delta_children(base->obj->idx.offset,
|
|
&base->ofs_first, &base->ofs_last,
|
|
OBJ_OFS_DELTA);
|
|
|
|
if (base->ref_last == -1 && base->ofs_last == -1) {
|
|
free(base->data);
|
|
return NULL;
|
|
}
|
|
|
|
link_base_data(prev_base, base);
|
|
}
|
|
|
|
if (base->ref_first <= base->ref_last) {
|
|
struct object_entry *child = objects + ref_deltas[base->ref_first].obj_no;
|
|
struct base_data *result = alloc_base_data();
|
|
|
|
if (!compare_and_swap_type(&child->real_type, OBJ_REF_DELTA,
|
|
base->obj->real_type))
|
|
die("BUG: child->real_type != OBJ_REF_DELTA");
|
|
|
|
resolve_delta(child, base, result);
|
|
if (base->ref_first == base->ref_last && base->ofs_last == -1)
|
|
free_base_data(base);
|
|
|
|
base->ref_first++;
|
|
return result;
|
|
}
|
|
|
|
if (base->ofs_first <= base->ofs_last) {
|
|
struct object_entry *child = objects + ofs_deltas[base->ofs_first].obj_no;
|
|
struct base_data *result = alloc_base_data();
|
|
|
|
assert(child->real_type == OBJ_OFS_DELTA);
|
|
child->real_type = base->obj->real_type;
|
|
resolve_delta(child, base, result);
|
|
if (base->ofs_first == base->ofs_last)
|
|
free_base_data(base);
|
|
|
|
base->ofs_first++;
|
|
return result;
|
|
}
|
|
|
|
unlink_base_data(base);
|
|
return NULL;
|
|
}
|
|
|
|
static void find_unresolved_deltas(struct base_data *base)
|
|
{
|
|
struct base_data *new_base, *prev_base = NULL;
|
|
for (;;) {
|
|
new_base = find_unresolved_deltas_1(base, prev_base);
|
|
|
|
if (new_base) {
|
|
prev_base = base;
|
|
base = new_base;
|
|
} else {
|
|
free(base);
|
|
base = prev_base;
|
|
if (!base)
|
|
return;
|
|
prev_base = base->base;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int compare_ofs_delta_entry(const void *a, const void *b)
|
|
{
|
|
const struct ofs_delta_entry *delta_a = a;
|
|
const struct ofs_delta_entry *delta_b = b;
|
|
|
|
return delta_a->offset < delta_b->offset ? -1 :
|
|
delta_a->offset > delta_b->offset ? 1 :
|
|
0;
|
|
}
|
|
|
|
static int compare_ref_delta_entry(const void *a, const void *b)
|
|
{
|
|
const struct ref_delta_entry *delta_a = a;
|
|
const struct ref_delta_entry *delta_b = b;
|
|
|
|
return oidcmp(&delta_a->oid, &delta_b->oid);
|
|
}
|
|
|
|
static void resolve_base(struct object_entry *obj)
|
|
{
|
|
struct base_data *base_obj = alloc_base_data();
|
|
base_obj->obj = obj;
|
|
base_obj->data = NULL;
|
|
find_unresolved_deltas(base_obj);
|
|
}
|
|
|
|
#ifndef NO_PTHREADS
|
|
static void *threaded_second_pass(void *data)
|
|
{
|
|
set_thread_data(data);
|
|
for (;;) {
|
|
int i;
|
|
counter_lock();
|
|
display_progress(progress, nr_resolved_deltas);
|
|
counter_unlock();
|
|
work_lock();
|
|
while (nr_dispatched < nr_objects &&
|
|
is_delta_type(objects[nr_dispatched].type))
|
|
nr_dispatched++;
|
|
if (nr_dispatched >= nr_objects) {
|
|
work_unlock();
|
|
break;
|
|
}
|
|
i = nr_dispatched++;
|
|
work_unlock();
|
|
|
|
resolve_base(&objects[i]);
|
|
}
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* First pass:
|
|
* - find locations of all objects;
|
|
* - calculate SHA1 of all non-delta objects;
|
|
* - remember base (SHA1 or offset) for all deltas.
|
|
*/
|
|
static void parse_pack_objects(unsigned char *hash)
|
|
{
|
|
int i, nr_delays = 0;
|
|
struct ofs_delta_entry *ofs_delta = ofs_deltas;
|
|
struct object_id ref_delta_oid;
|
|
struct stat st;
|
|
|
|
if (verbose)
|
|
progress = start_progress(
|
|
from_stdin ? _("Receiving objects") : _("Indexing objects"),
|
|
nr_objects);
|
|
for (i = 0; i < nr_objects; i++) {
|
|
struct object_entry *obj = &objects[i];
|
|
void *data = unpack_raw_entry(obj, &ofs_delta->offset,
|
|
&ref_delta_oid,
|
|
&obj->idx.oid);
|
|
obj->real_type = obj->type;
|
|
if (obj->type == OBJ_OFS_DELTA) {
|
|
nr_ofs_deltas++;
|
|
ofs_delta->obj_no = i;
|
|
ofs_delta++;
|
|
} else if (obj->type == OBJ_REF_DELTA) {
|
|
ALLOC_GROW(ref_deltas, nr_ref_deltas + 1, ref_deltas_alloc);
|
|
oidcpy(&ref_deltas[nr_ref_deltas].oid, &ref_delta_oid);
|
|
ref_deltas[nr_ref_deltas].obj_no = i;
|
|
nr_ref_deltas++;
|
|
} else if (!data) {
|
|
/* large blobs, check later */
|
|
obj->real_type = OBJ_BAD;
|
|
nr_delays++;
|
|
} else
|
|
sha1_object(data, NULL, obj->size, obj->type,
|
|
&obj->idx.oid);
|
|
free(data);
|
|
display_progress(progress, i+1);
|
|
}
|
|
objects[i].idx.offset = consumed_bytes;
|
|
stop_progress(&progress);
|
|
|
|
/* Check pack integrity */
|
|
flush();
|
|
the_hash_algo->final_fn(hash, &input_ctx);
|
|
if (hashcmp(fill(the_hash_algo->rawsz), hash))
|
|
die(_("pack is corrupted (SHA1 mismatch)"));
|
|
use(the_hash_algo->rawsz);
|
|
|
|
/* If input_fd is a file, we should have reached its end now. */
|
|
if (fstat(input_fd, &st))
|
|
die_errno(_("cannot fstat packfile"));
|
|
if (S_ISREG(st.st_mode) &&
|
|
lseek(input_fd, 0, SEEK_CUR) - input_len != st.st_size)
|
|
die(_("pack has junk at the end"));
|
|
|
|
for (i = 0; i < nr_objects; i++) {
|
|
struct object_entry *obj = &objects[i];
|
|
if (obj->real_type != OBJ_BAD)
|
|
continue;
|
|
obj->real_type = obj->type;
|
|
sha1_object(NULL, obj, obj->size, obj->type,
|
|
&obj->idx.oid);
|
|
nr_delays--;
|
|
}
|
|
if (nr_delays)
|
|
die(_("confusion beyond insanity in parse_pack_objects()"));
|
|
}
|
|
|
|
/*
|
|
* Second pass:
|
|
* - for all non-delta objects, look if it is used as a base for
|
|
* deltas;
|
|
* - if used as a base, uncompress the object and apply all deltas,
|
|
* recursively checking if the resulting object is used as a base
|
|
* for some more deltas.
|
|
*/
|
|
static void resolve_deltas(void)
|
|
{
|
|
int i;
|
|
|
|
if (!nr_ofs_deltas && !nr_ref_deltas)
|
|
return;
|
|
|
|
/* Sort deltas by base SHA1/offset for fast searching */
|
|
QSORT(ofs_deltas, nr_ofs_deltas, compare_ofs_delta_entry);
|
|
QSORT(ref_deltas, nr_ref_deltas, compare_ref_delta_entry);
|
|
|
|
if (verbose || show_resolving_progress)
|
|
progress = start_progress(_("Resolving deltas"),
|
|
nr_ref_deltas + nr_ofs_deltas);
|
|
|
|
#ifndef NO_PTHREADS
|
|
nr_dispatched = 0;
|
|
if (nr_threads > 1 || getenv("GIT_FORCE_THREADS")) {
|
|
init_thread();
|
|
for (i = 0; i < nr_threads; i++) {
|
|
int ret = pthread_create(&thread_data[i].thread, NULL,
|
|
threaded_second_pass, thread_data + i);
|
|
if (ret)
|
|
die(_("unable to create thread: %s"),
|
|
strerror(ret));
|
|
}
|
|
for (i = 0; i < nr_threads; i++)
|
|
pthread_join(thread_data[i].thread, NULL);
|
|
cleanup_thread();
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
for (i = 0; i < nr_objects; i++) {
|
|
struct object_entry *obj = &objects[i];
|
|
|
|
if (is_delta_type(obj->type))
|
|
continue;
|
|
resolve_base(obj);
|
|
display_progress(progress, nr_resolved_deltas);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Third pass:
|
|
* - append objects to convert thin pack to full pack if required
|
|
* - write the final pack hash
|
|
*/
|
|
static void fix_unresolved_deltas(struct hashfile *f);
|
|
static void conclude_pack(int fix_thin_pack, const char *curr_pack, unsigned char *pack_hash)
|
|
{
|
|
if (nr_ref_deltas + nr_ofs_deltas == nr_resolved_deltas) {
|
|
stop_progress(&progress);
|
|
/* Flush remaining pack final hash. */
|
|
flush();
|
|
return;
|
|
}
|
|
|
|
if (fix_thin_pack) {
|
|
struct hashfile *f;
|
|
unsigned char read_hash[GIT_MAX_RAWSZ], tail_hash[GIT_MAX_RAWSZ];
|
|
struct strbuf msg = STRBUF_INIT;
|
|
int nr_unresolved = nr_ofs_deltas + nr_ref_deltas - nr_resolved_deltas;
|
|
int nr_objects_initial = nr_objects;
|
|
if (nr_unresolved <= 0)
|
|
die(_("confusion beyond insanity"));
|
|
REALLOC_ARRAY(objects, nr_objects + nr_unresolved + 1);
|
|
memset(objects + nr_objects + 1, 0,
|
|
nr_unresolved * sizeof(*objects));
|
|
f = hashfd(output_fd, curr_pack);
|
|
fix_unresolved_deltas(f);
|
|
strbuf_addf(&msg, Q_("completed with %d local object",
|
|
"completed with %d local objects",
|
|
nr_objects - nr_objects_initial),
|
|
nr_objects - nr_objects_initial);
|
|
stop_progress_msg(&progress, msg.buf);
|
|
strbuf_release(&msg);
|
|
hashclose(f, tail_hash, 0);
|
|
hashcpy(read_hash, pack_hash);
|
|
fixup_pack_header_footer(output_fd, pack_hash,
|
|
curr_pack, nr_objects,
|
|
read_hash, consumed_bytes-the_hash_algo->rawsz);
|
|
if (hashcmp(read_hash, tail_hash) != 0)
|
|
die(_("Unexpected tail checksum for %s "
|
|
"(disk corruption?)"), curr_pack);
|
|
}
|
|
if (nr_ofs_deltas + nr_ref_deltas != nr_resolved_deltas)
|
|
die(Q_("pack has %d unresolved delta",
|
|
"pack has %d unresolved deltas",
|
|
nr_ofs_deltas + nr_ref_deltas - nr_resolved_deltas),
|
|
nr_ofs_deltas + nr_ref_deltas - nr_resolved_deltas);
|
|
}
|
|
|
|
static int write_compressed(struct hashfile *f, void *in, unsigned int size)
|
|
{
|
|
git_zstream stream;
|
|
int status;
|
|
unsigned char outbuf[4096];
|
|
|
|
git_deflate_init(&stream, zlib_compression_level);
|
|
stream.next_in = in;
|
|
stream.avail_in = size;
|
|
|
|
do {
|
|
stream.next_out = outbuf;
|
|
stream.avail_out = sizeof(outbuf);
|
|
status = git_deflate(&stream, Z_FINISH);
|
|
hashwrite(f, outbuf, sizeof(outbuf) - stream.avail_out);
|
|
} while (status == Z_OK);
|
|
|
|
if (status != Z_STREAM_END)
|
|
die(_("unable to deflate appended object (%d)"), status);
|
|
size = stream.total_out;
|
|
git_deflate_end(&stream);
|
|
return size;
|
|
}
|
|
|
|
static struct object_entry *append_obj_to_pack(struct hashfile *f,
|
|
const unsigned char *sha1, void *buf,
|
|
unsigned long size, enum object_type type)
|
|
{
|
|
struct object_entry *obj = &objects[nr_objects++];
|
|
unsigned char header[10];
|
|
unsigned long s = size;
|
|
int n = 0;
|
|
unsigned char c = (type << 4) | (s & 15);
|
|
s >>= 4;
|
|
while (s) {
|
|
header[n++] = c | 0x80;
|
|
c = s & 0x7f;
|
|
s >>= 7;
|
|
}
|
|
header[n++] = c;
|
|
crc32_begin(f);
|
|
hashwrite(f, header, n);
|
|
obj[0].size = size;
|
|
obj[0].hdr_size = n;
|
|
obj[0].type = type;
|
|
obj[0].real_type = type;
|
|
obj[1].idx.offset = obj[0].idx.offset + n;
|
|
obj[1].idx.offset += write_compressed(f, buf, size);
|
|
obj[0].idx.crc32 = crc32_end(f);
|
|
hashflush(f);
|
|
hashcpy(obj->idx.oid.hash, sha1);
|
|
return obj;
|
|
}
|
|
|
|
static int delta_pos_compare(const void *_a, const void *_b)
|
|
{
|
|
struct ref_delta_entry *a = *(struct ref_delta_entry **)_a;
|
|
struct ref_delta_entry *b = *(struct ref_delta_entry **)_b;
|
|
return a->obj_no - b->obj_no;
|
|
}
|
|
|
|
static void fix_unresolved_deltas(struct hashfile *f)
|
|
{
|
|
struct ref_delta_entry **sorted_by_pos;
|
|
int i;
|
|
|
|
/*
|
|
* Since many unresolved deltas may well be themselves base objects
|
|
* for more unresolved deltas, we really want to include the
|
|
* smallest number of base objects that would cover as much delta
|
|
* as possible by picking the
|
|
* trunc deltas first, allowing for other deltas to resolve without
|
|
* additional base objects. Since most base objects are to be found
|
|
* before deltas depending on them, a good heuristic is to start
|
|
* resolving deltas in the same order as their position in the pack.
|
|
*/
|
|
ALLOC_ARRAY(sorted_by_pos, nr_ref_deltas);
|
|
for (i = 0; i < nr_ref_deltas; i++)
|
|
sorted_by_pos[i] = &ref_deltas[i];
|
|
QSORT(sorted_by_pos, nr_ref_deltas, delta_pos_compare);
|
|
|
|
for (i = 0; i < nr_ref_deltas; i++) {
|
|
struct ref_delta_entry *d = sorted_by_pos[i];
|
|
enum object_type type;
|
|
struct base_data *base_obj = alloc_base_data();
|
|
|
|
if (objects[d->obj_no].real_type != OBJ_REF_DELTA)
|
|
continue;
|
|
base_obj->data = read_sha1_file(d->oid.hash, &type, &base_obj->size);
|
|
if (!base_obj->data)
|
|
continue;
|
|
|
|
if (check_sha1_signature(d->oid.hash, base_obj->data,
|
|
base_obj->size, type_name(type)))
|
|
die(_("local object %s is corrupt"), oid_to_hex(&d->oid));
|
|
base_obj->obj = append_obj_to_pack(f, d->oid.hash,
|
|
base_obj->data, base_obj->size, type);
|
|
find_unresolved_deltas(base_obj);
|
|
display_progress(progress, nr_resolved_deltas);
|
|
}
|
|
free(sorted_by_pos);
|
|
}
|
|
|
|
static const char *derive_filename(const char *pack_name, const char *suffix,
|
|
struct strbuf *buf)
|
|
{
|
|
size_t len;
|
|
if (!strip_suffix(pack_name, ".pack", &len))
|
|
die(_("packfile name '%s' does not end with '.pack'"),
|
|
pack_name);
|
|
strbuf_add(buf, pack_name, len);
|
|
strbuf_addch(buf, '.');
|
|
strbuf_addstr(buf, suffix);
|
|
return buf->buf;
|
|
}
|
|
|
|
static void write_special_file(const char *suffix, const char *msg,
|
|
const char *pack_name, const unsigned char *hash,
|
|
const char **report)
|
|
{
|
|
struct strbuf name_buf = STRBUF_INIT;
|
|
const char *filename;
|
|
int fd;
|
|
int msg_len = strlen(msg);
|
|
|
|
if (pack_name)
|
|
filename = derive_filename(pack_name, suffix, &name_buf);
|
|
else
|
|
filename = odb_pack_name(&name_buf, hash, suffix);
|
|
|
|
fd = odb_pack_keep(filename);
|
|
if (fd < 0) {
|
|
if (errno != EEXIST)
|
|
die_errno(_("cannot write %s file '%s'"),
|
|
suffix, filename);
|
|
} else {
|
|
if (msg_len > 0) {
|
|
write_or_die(fd, msg, msg_len);
|
|
write_or_die(fd, "\n", 1);
|
|
}
|
|
if (close(fd) != 0)
|
|
die_errno(_("cannot close written %s file '%s'"),
|
|
suffix, filename);
|
|
if (report)
|
|
*report = suffix;
|
|
}
|
|
strbuf_release(&name_buf);
|
|
}
|
|
|
|
static void final(const char *final_pack_name, const char *curr_pack_name,
|
|
const char *final_index_name, const char *curr_index_name,
|
|
const char *keep_msg, const char *promisor_msg,
|
|
unsigned char *hash)
|
|
{
|
|
const char *report = "pack";
|
|
struct strbuf pack_name = STRBUF_INIT;
|
|
struct strbuf index_name = STRBUF_INIT;
|
|
int err;
|
|
|
|
if (!from_stdin) {
|
|
close(input_fd);
|
|
} else {
|
|
fsync_or_die(output_fd, curr_pack_name);
|
|
err = close(output_fd);
|
|
if (err)
|
|
die_errno(_("error while closing pack file"));
|
|
}
|
|
|
|
if (keep_msg)
|
|
write_special_file("keep", keep_msg, final_pack_name, hash,
|
|
&report);
|
|
if (promisor_msg)
|
|
write_special_file("promisor", promisor_msg, final_pack_name,
|
|
hash, NULL);
|
|
|
|
if (final_pack_name != curr_pack_name) {
|
|
if (!final_pack_name)
|
|
final_pack_name = odb_pack_name(&pack_name, hash, "pack");
|
|
if (finalize_object_file(curr_pack_name, final_pack_name))
|
|
die(_("cannot store pack file"));
|
|
} else if (from_stdin)
|
|
chmod(final_pack_name, 0444);
|
|
|
|
if (final_index_name != curr_index_name) {
|
|
if (!final_index_name)
|
|
final_index_name = odb_pack_name(&index_name, hash, "idx");
|
|
if (finalize_object_file(curr_index_name, final_index_name))
|
|
die(_("cannot store index file"));
|
|
} else
|
|
chmod(final_index_name, 0444);
|
|
|
|
if (!from_stdin) {
|
|
printf("%s\n", sha1_to_hex(hash));
|
|
} else {
|
|
struct strbuf buf = STRBUF_INIT;
|
|
|
|
strbuf_addf(&buf, "%s\t%s\n", report, sha1_to_hex(hash));
|
|
write_or_die(1, buf.buf, buf.len);
|
|
strbuf_release(&buf);
|
|
|
|
/*
|
|
* Let's just mimic git-unpack-objects here and write
|
|
* the last part of the input buffer to stdout.
|
|
*/
|
|
while (input_len) {
|
|
err = xwrite(1, input_buffer + input_offset, input_len);
|
|
if (err <= 0)
|
|
break;
|
|
input_len -= err;
|
|
input_offset += err;
|
|
}
|
|
}
|
|
|
|
strbuf_release(&index_name);
|
|
strbuf_release(&pack_name);
|
|
}
|
|
|
|
static int git_index_pack_config(const char *k, const char *v, void *cb)
|
|
{
|
|
struct pack_idx_option *opts = cb;
|
|
|
|
if (!strcmp(k, "pack.indexversion")) {
|
|
opts->version = git_config_int(k, v);
|
|
if (opts->version > 2)
|
|
die(_("bad pack.indexversion=%"PRIu32), opts->version);
|
|
return 0;
|
|
}
|
|
if (!strcmp(k, "pack.threads")) {
|
|
nr_threads = git_config_int(k, v);
|
|
if (nr_threads < 0)
|
|
die(_("invalid number of threads specified (%d)"),
|
|
nr_threads);
|
|
#ifdef NO_PTHREADS
|
|
if (nr_threads != 1)
|
|
warning(_("no threads support, ignoring %s"), k);
|
|
nr_threads = 1;
|
|
#endif
|
|
return 0;
|
|
}
|
|
return git_default_config(k, v, cb);
|
|
}
|
|
|
|
static int cmp_uint32(const void *a_, const void *b_)
|
|
{
|
|
uint32_t a = *((uint32_t *)a_);
|
|
uint32_t b = *((uint32_t *)b_);
|
|
|
|
return (a < b) ? -1 : (a != b);
|
|
}
|
|
|
|
static void read_v2_anomalous_offsets(struct packed_git *p,
|
|
struct pack_idx_option *opts)
|
|
{
|
|
const uint32_t *idx1, *idx2;
|
|
uint32_t i;
|
|
|
|
/* The address of the 4-byte offset table */
|
|
idx1 = (((const uint32_t *)p->index_data)
|
|
+ 2 /* 8-byte header */
|
|
+ 256 /* fan out */
|
|
+ 5 * p->num_objects /* 20-byte SHA-1 table */
|
|
+ p->num_objects /* CRC32 table */
|
|
);
|
|
|
|
/* The address of the 8-byte offset table */
|
|
idx2 = idx1 + p->num_objects;
|
|
|
|
for (i = 0; i < p->num_objects; i++) {
|
|
uint32_t off = ntohl(idx1[i]);
|
|
if (!(off & 0x80000000))
|
|
continue;
|
|
off = off & 0x7fffffff;
|
|
check_pack_index_ptr(p, &idx2[off * 2]);
|
|
if (idx2[off * 2])
|
|
continue;
|
|
/*
|
|
* The real offset is ntohl(idx2[off * 2]) in high 4
|
|
* octets, and ntohl(idx2[off * 2 + 1]) in low 4
|
|
* octets. But idx2[off * 2] is Zero!!!
|
|
*/
|
|
ALLOC_GROW(opts->anomaly, opts->anomaly_nr + 1, opts->anomaly_alloc);
|
|
opts->anomaly[opts->anomaly_nr++] = ntohl(idx2[off * 2 + 1]);
|
|
}
|
|
|
|
QSORT(opts->anomaly, opts->anomaly_nr, cmp_uint32);
|
|
}
|
|
|
|
static void read_idx_option(struct pack_idx_option *opts, const char *pack_name)
|
|
{
|
|
struct packed_git *p = add_packed_git(pack_name, strlen(pack_name), 1);
|
|
|
|
if (!p)
|
|
die(_("Cannot open existing pack file '%s'"), pack_name);
|
|
if (open_pack_index(p))
|
|
die(_("Cannot open existing pack idx file for '%s'"), pack_name);
|
|
|
|
/* Read the attributes from the existing idx file */
|
|
opts->version = p->index_version;
|
|
|
|
if (opts->version == 2)
|
|
read_v2_anomalous_offsets(p, opts);
|
|
|
|
/*
|
|
* Get rid of the idx file as we do not need it anymore.
|
|
* NEEDSWORK: extract this bit from free_pack_by_name() in
|
|
* sha1_file.c, perhaps? It shouldn't matter very much as we
|
|
* know we haven't installed this pack (hence we never have
|
|
* read anything from it).
|
|
*/
|
|
close_pack_index(p);
|
|
free(p);
|
|
}
|
|
|
|
static void show_pack_info(int stat_only)
|
|
{
|
|
int i, baseobjects = nr_objects - nr_ref_deltas - nr_ofs_deltas;
|
|
unsigned long *chain_histogram = NULL;
|
|
|
|
if (deepest_delta)
|
|
chain_histogram = xcalloc(deepest_delta, sizeof(unsigned long));
|
|
|
|
for (i = 0; i < nr_objects; i++) {
|
|
struct object_entry *obj = &objects[i];
|
|
|
|
if (is_delta_type(obj->type))
|
|
chain_histogram[obj_stat[i].delta_depth - 1]++;
|
|
if (stat_only)
|
|
continue;
|
|
printf("%s %-6s %lu %lu %"PRIuMAX,
|
|
oid_to_hex(&obj->idx.oid),
|
|
type_name(obj->real_type), obj->size,
|
|
(unsigned long)(obj[1].idx.offset - obj->idx.offset),
|
|
(uintmax_t)obj->idx.offset);
|
|
if (is_delta_type(obj->type)) {
|
|
struct object_entry *bobj = &objects[obj_stat[i].base_object_no];
|
|
printf(" %u %s", obj_stat[i].delta_depth,
|
|
oid_to_hex(&bobj->idx.oid));
|
|
}
|
|
putchar('\n');
|
|
}
|
|
|
|
if (baseobjects)
|
|
printf_ln(Q_("non delta: %d object",
|
|
"non delta: %d objects",
|
|
baseobjects),
|
|
baseobjects);
|
|
for (i = 0; i < deepest_delta; i++) {
|
|
if (!chain_histogram[i])
|
|
continue;
|
|
printf_ln(Q_("chain length = %d: %lu object",
|
|
"chain length = %d: %lu objects",
|
|
chain_histogram[i]),
|
|
i + 1,
|
|
chain_histogram[i]);
|
|
}
|
|
}
|
|
|
|
int cmd_index_pack(int argc, const char **argv, const char *prefix)
|
|
{
|
|
int i, fix_thin_pack = 0, verify = 0, stat_only = 0;
|
|
const char *curr_index;
|
|
const char *index_name = NULL, *pack_name = NULL;
|
|
const char *keep_msg = NULL;
|
|
const char *promisor_msg = NULL;
|
|
struct strbuf index_name_buf = STRBUF_INIT;
|
|
struct pack_idx_entry **idx_objects;
|
|
struct pack_idx_option opts;
|
|
unsigned char pack_hash[GIT_MAX_RAWSZ];
|
|
unsigned foreign_nr = 1; /* zero is a "good" value, assume bad */
|
|
int report_end_of_input = 0;
|
|
|
|
/*
|
|
* index-pack never needs to fetch missing objects, since it only
|
|
* accesses the repo to do hash collision checks
|
|
*/
|
|
fetch_if_missing = 0;
|
|
|
|
if (argc == 2 && !strcmp(argv[1], "-h"))
|
|
usage(index_pack_usage);
|
|
|
|
check_replace_refs = 0;
|
|
fsck_options.walk = mark_link;
|
|
|
|
reset_pack_idx_option(&opts);
|
|
git_config(git_index_pack_config, &opts);
|
|
if (prefix && chdir(prefix))
|
|
die(_("Cannot come back to cwd"));
|
|
|
|
for (i = 1; i < argc; i++) {
|
|
const char *arg = argv[i];
|
|
|
|
if (*arg == '-') {
|
|
if (!strcmp(arg, "--stdin")) {
|
|
from_stdin = 1;
|
|
} else if (!strcmp(arg, "--fix-thin")) {
|
|
fix_thin_pack = 1;
|
|
} else if (skip_to_optional_arg(arg, "--strict", &arg)) {
|
|
strict = 1;
|
|
do_fsck_object = 1;
|
|
fsck_set_msg_types(&fsck_options, arg);
|
|
} else if (!strcmp(arg, "--check-self-contained-and-connected")) {
|
|
strict = 1;
|
|
check_self_contained_and_connected = 1;
|
|
} else if (!strcmp(arg, "--verify")) {
|
|
verify = 1;
|
|
} else if (!strcmp(arg, "--verify-stat")) {
|
|
verify = 1;
|
|
show_stat = 1;
|
|
} else if (!strcmp(arg, "--verify-stat-only")) {
|
|
verify = 1;
|
|
show_stat = 1;
|
|
stat_only = 1;
|
|
} else if (skip_to_optional_arg(arg, "--keep", &keep_msg)) {
|
|
; /* nothing to do */
|
|
} else if (skip_to_optional_arg(arg, "--promisor", &promisor_msg)) {
|
|
; /* already parsed */
|
|
} else if (starts_with(arg, "--threads=")) {
|
|
char *end;
|
|
nr_threads = strtoul(arg+10, &end, 0);
|
|
if (!arg[10] || *end || nr_threads < 0)
|
|
usage(index_pack_usage);
|
|
#ifdef NO_PTHREADS
|
|
if (nr_threads != 1)
|
|
warning(_("no threads support, "
|
|
"ignoring %s"), arg);
|
|
nr_threads = 1;
|
|
#endif
|
|
} else if (starts_with(arg, "--pack_header=")) {
|
|
struct pack_header *hdr;
|
|
char *c;
|
|
|
|
hdr = (struct pack_header *)input_buffer;
|
|
hdr->hdr_signature = htonl(PACK_SIGNATURE);
|
|
hdr->hdr_version = htonl(strtoul(arg + 14, &c, 10));
|
|
if (*c != ',')
|
|
die(_("bad %s"), arg);
|
|
hdr->hdr_entries = htonl(strtoul(c + 1, &c, 10));
|
|
if (*c)
|
|
die(_("bad %s"), arg);
|
|
input_len = sizeof(*hdr);
|
|
} else if (!strcmp(arg, "-v")) {
|
|
verbose = 1;
|
|
} else if (!strcmp(arg, "--show-resolving-progress")) {
|
|
show_resolving_progress = 1;
|
|
} else if (!strcmp(arg, "--report-end-of-input")) {
|
|
report_end_of_input = 1;
|
|
} else if (!strcmp(arg, "-o")) {
|
|
if (index_name || (i+1) >= argc)
|
|
usage(index_pack_usage);
|
|
index_name = argv[++i];
|
|
} else if (starts_with(arg, "--index-version=")) {
|
|
char *c;
|
|
opts.version = strtoul(arg + 16, &c, 10);
|
|
if (opts.version > 2)
|
|
die(_("bad %s"), arg);
|
|
if (*c == ',')
|
|
opts.off32_limit = strtoul(c+1, &c, 0);
|
|
if (*c || opts.off32_limit & 0x80000000)
|
|
die(_("bad %s"), arg);
|
|
} else if (skip_prefix(arg, "--max-input-size=", &arg)) {
|
|
max_input_size = strtoumax(arg, NULL, 10);
|
|
} else
|
|
usage(index_pack_usage);
|
|
continue;
|
|
}
|
|
|
|
if (pack_name)
|
|
usage(index_pack_usage);
|
|
pack_name = arg;
|
|
}
|
|
|
|
if (!pack_name && !from_stdin)
|
|
usage(index_pack_usage);
|
|
if (fix_thin_pack && !from_stdin)
|
|
die(_("--fix-thin cannot be used without --stdin"));
|
|
if (from_stdin && !startup_info->have_repository)
|
|
die(_("--stdin requires a git repository"));
|
|
if (!index_name && pack_name)
|
|
index_name = derive_filename(pack_name, "idx", &index_name_buf);
|
|
|
|
if (verify) {
|
|
if (!index_name)
|
|
die(_("--verify with no packfile name given"));
|
|
read_idx_option(&opts, index_name);
|
|
opts.flags |= WRITE_IDX_VERIFY | WRITE_IDX_STRICT;
|
|
}
|
|
if (strict)
|
|
opts.flags |= WRITE_IDX_STRICT;
|
|
|
|
#ifndef NO_PTHREADS
|
|
if (!nr_threads) {
|
|
nr_threads = online_cpus();
|
|
/* An experiment showed that more threads does not mean faster */
|
|
if (nr_threads > 3)
|
|
nr_threads = 3;
|
|
}
|
|
#endif
|
|
|
|
curr_pack = open_pack_file(pack_name);
|
|
parse_pack_header();
|
|
objects = xcalloc(st_add(nr_objects, 1), sizeof(struct object_entry));
|
|
if (show_stat)
|
|
obj_stat = xcalloc(st_add(nr_objects, 1), sizeof(struct object_stat));
|
|
ofs_deltas = xcalloc(nr_objects, sizeof(struct ofs_delta_entry));
|
|
parse_pack_objects(pack_hash);
|
|
if (report_end_of_input)
|
|
write_in_full(2, "\0", 1);
|
|
resolve_deltas();
|
|
conclude_pack(fix_thin_pack, curr_pack, pack_hash);
|
|
free(ofs_deltas);
|
|
free(ref_deltas);
|
|
if (strict)
|
|
foreign_nr = check_objects();
|
|
|
|
if (show_stat)
|
|
show_pack_info(stat_only);
|
|
|
|
ALLOC_ARRAY(idx_objects, nr_objects);
|
|
for (i = 0; i < nr_objects; i++)
|
|
idx_objects[i] = &objects[i].idx;
|
|
curr_index = write_idx_file(index_name, idx_objects, nr_objects, &opts, pack_hash);
|
|
free(idx_objects);
|
|
|
|
if (!verify)
|
|
final(pack_name, curr_pack,
|
|
index_name, curr_index,
|
|
keep_msg, promisor_msg,
|
|
pack_hash);
|
|
else
|
|
close(input_fd);
|
|
free(objects);
|
|
strbuf_release(&index_name_buf);
|
|
if (pack_name == NULL)
|
|
free((void *) curr_pack);
|
|
if (index_name == NULL)
|
|
free((void *) curr_index);
|
|
|
|
/*
|
|
* Let the caller know this pack is not self contained
|
|
*/
|
|
if (check_self_contained_and_connected && foreign_nr)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|