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![Jeff King](/assets/img/avatar_default.png)
This rounds out the previous three patches, covering the inequality logic for the "hash" variant of the functions. As with the previous three, the accompanying code changes are the mechanical result of applying the coccinelle patch; see those patches for more discussion. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
1854 lines
48 KiB
C
1854 lines
48 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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#include "object-store.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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/* Remember to update object flag allocation in object.h */
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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 = oid_object_info(the_repository, &obj->oid, &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))
|
|
bad_object(obj->idx.offset, _("offset value overflow for delta base object"));
|
|
p = fill(1);
|
|
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 && oideq(&ref_deltas[first - 1].oid, oid))
|
|
--first;
|
|
while (last < end && oideq(&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, &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 = oid_object_info(the_repository, oid, &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_object_file(oid, &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 || do_fsck_object) {
|
|
read_lock();
|
|
if (type == OBJ_BLOB) {
|
|
struct blob *blob = lookup_blob(the_repository, oid);
|
|
if (blob)
|
|
blob->object.flags |= FLAG_CHECKED;
|
|
else
|
|
die(_("invalid blob object %s"), oid_to_hex(oid));
|
|
if (do_fsck_object &&
|
|
fsck_object(&blob->object, (void *)data, size, &fsck_options))
|
|
die(_("fsck error in packed object"));
|
|
} 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(the_repository, 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(_("fsck error in packed object"));
|
|
if (strict && 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)
|
|
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))
|
|
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 (!hasheq(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);
|
|
finalize_hashfile(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 (!hasheq(read_hash, tail_hash))
|
|
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_object_file(&d->oid, &type,
|
|
&base_obj->size);
|
|
if (!base_obj->data)
|
|
continue;
|
|
|
|
if (check_object_signature(&d->oid, 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 (do_fsck_object) {
|
|
struct packed_git *p;
|
|
p = add_packed_git(final_index_name, strlen(final_index_name), 0);
|
|
if (p)
|
|
install_packed_git(the_repository, p);
|
|
}
|
|
|
|
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;
|
|
const uint32_t hashwords = the_hash_algo->rawsz / sizeof(uint32_t);
|
|
|
|
/* The address of the 4-byte offset table */
|
|
idx1 = (((const uint32_t *)p->index_data)
|
|
+ 2 /* 8-byte header */
|
|
+ 256 /* fan out */
|
|
+ hashwords * p->num_objects /* object ID 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);
|
|
|
|
read_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, "--fsck-objects")) {
|
|
do_fsck_object = 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);
|
|
|
|
if (do_fsck_object && fsck_finish(&fsck_options))
|
|
die(_("fsck error in pack objects"));
|
|
|
|
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;
|
|
}
|