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untracked cache: load from UNTR index extension
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Nguyễn Thái Ngọc Duy
Junio C Hamano
parent
83c094ad0d
commit
f9e6c64958
219
dir.c
219
dir.c
@ -2283,3 +2283,222 @@ void write_untracked_extension(struct strbuf *out, struct untracked_cache *untra
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strbuf_release(&wd.sb_stat);
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strbuf_release(&wd.sb_sha1);
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}
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static void free_untracked(struct untracked_cache_dir *ucd)
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{
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int i;
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if (!ucd)
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return;
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for (i = 0; i < ucd->dirs_nr; i++)
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free_untracked(ucd->dirs[i]);
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for (i = 0; i < ucd->untracked_nr; i++)
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free(ucd->untracked[i]);
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free(ucd->untracked);
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free(ucd->dirs);
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free(ucd);
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}
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void free_untracked_cache(struct untracked_cache *uc)
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{
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if (uc)
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free_untracked(uc->root);
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free(uc);
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}
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struct read_data {
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int index;
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struct untracked_cache_dir **ucd;
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struct ewah_bitmap *check_only;
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struct ewah_bitmap *valid;
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struct ewah_bitmap *sha1_valid;
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const unsigned char *data;
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const unsigned char *end;
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};
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static void stat_data_from_disk(struct stat_data *to, const struct stat_data *from)
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{
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to->sd_ctime.sec = get_be32(&from->sd_ctime.sec);
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to->sd_ctime.nsec = get_be32(&from->sd_ctime.nsec);
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to->sd_mtime.sec = get_be32(&from->sd_mtime.sec);
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to->sd_mtime.nsec = get_be32(&from->sd_mtime.nsec);
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to->sd_dev = get_be32(&from->sd_dev);
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to->sd_ino = get_be32(&from->sd_ino);
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to->sd_uid = get_be32(&from->sd_uid);
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to->sd_gid = get_be32(&from->sd_gid);
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to->sd_size = get_be32(&from->sd_size);
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}
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static int read_one_dir(struct untracked_cache_dir **untracked_,
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struct read_data *rd)
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{
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struct untracked_cache_dir ud, *untracked;
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const unsigned char *next, *data = rd->data, *end = rd->end;
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unsigned int value;
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int i, len;
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memset(&ud, 0, sizeof(ud));
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next = data;
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value = decode_varint(&next);
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if (next > end)
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return -1;
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ud.recurse = 1;
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ud.untracked_alloc = value;
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ud.untracked_nr = value;
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if (ud.untracked_nr)
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ud.untracked = xmalloc(sizeof(*ud.untracked) * ud.untracked_nr);
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data = next;
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next = data;
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ud.dirs_alloc = ud.dirs_nr = decode_varint(&next);
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if (next > end)
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return -1;
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ud.dirs = xmalloc(sizeof(*ud.dirs) * ud.dirs_nr);
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data = next;
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len = strlen((const char *)data);
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next = data + len + 1;
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if (next > rd->end)
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return -1;
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*untracked_ = untracked = xmalloc(sizeof(*untracked) + len);
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memcpy(untracked, &ud, sizeof(ud));
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memcpy(untracked->name, data, len + 1);
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data = next;
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for (i = 0; i < untracked->untracked_nr; i++) {
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len = strlen((const char *)data);
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next = data + len + 1;
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if (next > rd->end)
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return -1;
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untracked->untracked[i] = xstrdup((const char*)data);
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data = next;
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}
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rd->ucd[rd->index++] = untracked;
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rd->data = data;
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for (i = 0; i < untracked->dirs_nr; i++) {
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len = read_one_dir(untracked->dirs + i, rd);
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if (len < 0)
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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 void set_check_only(size_t pos, void *cb)
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{
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struct read_data *rd = cb;
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struct untracked_cache_dir *ud = rd->ucd[pos];
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ud->check_only = 1;
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}
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static void read_stat(size_t pos, void *cb)
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{
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struct read_data *rd = cb;
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struct untracked_cache_dir *ud = rd->ucd[pos];
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if (rd->data + sizeof(struct stat_data) > rd->end) {
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rd->data = rd->end + 1;
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return;
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}
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stat_data_from_disk(&ud->stat_data, (struct stat_data *)rd->data);
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rd->data += sizeof(struct stat_data);
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ud->valid = 1;
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}
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static void read_sha1(size_t pos, void *cb)
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{
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struct read_data *rd = cb;
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struct untracked_cache_dir *ud = rd->ucd[pos];
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if (rd->data + 20 > rd->end) {
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rd->data = rd->end + 1;
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return;
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}
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hashcpy(ud->exclude_sha1, rd->data);
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rd->data += 20;
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}
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static void load_sha1_stat(struct sha1_stat *sha1_stat,
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const struct stat_data *stat,
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const unsigned char *sha1)
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{
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stat_data_from_disk(&sha1_stat->stat, stat);
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hashcpy(sha1_stat->sha1, sha1);
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sha1_stat->valid = 1;
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}
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struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz)
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{
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const struct ondisk_untracked_cache *ouc;
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struct untracked_cache *uc;
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struct read_data rd;
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const unsigned char *next = data, *end = (const unsigned char *)data + sz;
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int len;
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if (sz <= 1 || end[-1] != '\0')
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return NULL;
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end--;
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ouc = (const struct ondisk_untracked_cache *)next;
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if (next + ouc_size(0) > end)
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return NULL;
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uc = xcalloc(1, sizeof(*uc));
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load_sha1_stat(&uc->ss_info_exclude, &ouc->info_exclude_stat,
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ouc->info_exclude_sha1);
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load_sha1_stat(&uc->ss_excludes_file, &ouc->excludes_file_stat,
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ouc->excludes_file_sha1);
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uc->dir_flags = get_be32(&ouc->dir_flags);
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uc->exclude_per_dir = xstrdup(ouc->exclude_per_dir);
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/* NUL after exclude_per_dir is covered by sizeof(*ouc) */
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next += ouc_size(strlen(ouc->exclude_per_dir));
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if (next >= end)
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goto done2;
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len = decode_varint(&next);
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if (next > end || len == 0)
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goto done2;
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rd.valid = ewah_new();
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rd.check_only = ewah_new();
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rd.sha1_valid = ewah_new();
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rd.data = next;
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rd.end = end;
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rd.index = 0;
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rd.ucd = xmalloc(sizeof(*rd.ucd) * len);
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if (read_one_dir(&uc->root, &rd) || rd.index != len)
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goto done;
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next = rd.data;
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len = ewah_read_mmap(rd.valid, next, end - next);
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if (len < 0)
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goto done;
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next += len;
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len = ewah_read_mmap(rd.check_only, next, end - next);
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if (len < 0)
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goto done;
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next += len;
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len = ewah_read_mmap(rd.sha1_valid, next, end - next);
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if (len < 0)
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goto done;
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ewah_each_bit(rd.check_only, set_check_only, &rd);
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rd.data = next + len;
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ewah_each_bit(rd.valid, read_stat, &rd);
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ewah_each_bit(rd.sha1_valid, read_sha1, &rd);
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next = rd.data;
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done:
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free(rd.ucd);
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ewah_free(rd.valid);
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ewah_free(rd.check_only);
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ewah_free(rd.sha1_valid);
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done2:
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if (next != end) {
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free_untracked_cache(uc);
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uc = NULL;
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}
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return uc;
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}
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2
dir.h
2
dir.h
@ -298,5 +298,7 @@ static inline int dir_path_match(const struct dir_entry *ent,
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has_trailing_dir);
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}
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void free_untracked_cache(struct untracked_cache *);
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struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz);
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void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked);
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#endif
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@ -1371,6 +1371,9 @@ static int read_index_extension(struct index_state *istate,
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if (read_link_extension(istate, data, sz))
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return -1;
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break;
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case CACHE_EXT_UNTRACKED:
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istate->untracked = read_untracked_extension(data, sz);
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break;
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default:
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if (*ext < 'A' || 'Z' < *ext)
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return error("index uses %.4s extension, which we do not understand",
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@ -1662,6 +1665,8 @@ int discard_index(struct index_state *istate)
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istate->cache = NULL;
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istate->cache_alloc = 0;
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discard_split_index(istate);
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free_untracked_cache(istate->untracked);
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istate->untracked = NULL;
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return 0;
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}
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