diff options
Diffstat (limited to 'refs.c')
| -rw-r--r-- | refs.c | 720 |
1 files changed, 529 insertions, 191 deletions
@@ -6,51 +6,71 @@ #include "string-list.h" /* - * Make sure "ref" is something reasonable to have under ".git/refs/"; - * We do not like it if: + * How to handle various characters in refnames: + * This table is used by both the SIMD and non-SIMD code. It has + * some cases that are only useful for the SIMD; these are handled + * equivalently to the listed disposition in the non-SIMD code. + * 0: An acceptable character for refs + * 1: @, look for a following { to reject @{ in refs (SIMD or = 0) + * 2: \0: End-of-component and string + * 3: /: End-of-component (SIMD or = 2) + * 4: ., look for a preceding . to reject .. in refs + * 5: {, look for a preceding @ to reject @{ in refs + * 6: *, usually a bad character except, once as a wildcard (SIMD or = 7) + * 7: A bad character except * (see check_refname_component below) + */ +static unsigned char refname_disposition[256] = { + 2, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, + 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, + 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 4, 3, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 7, 0, 0, 0, 0, 7, + 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 7, 7, 0, 7, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 7, 7 +}; + +/* + * Try to read one refname component from the front of refname. + * Return the length of the component found, or -1 if the component is + * not legal. It is legal if it is something reasonable to have under + * ".git/refs/"; We do not like it if: * * - any path component of it begins with ".", or * - it has double dots "..", or * - it has ASCII control character, "~", "^", ":" or SP, anywhere, or - * - it ends with a "/". - * - it ends with ".lock" + * - it has pattern-matching notation "*", "?", "[", anywhere, or + * - it ends with a "/", or + * - it ends with ".lock", or * - it contains a "\" (backslash) */ - -/* Return true iff ch is not allowed in reference names. */ -static inline int bad_ref_char(int ch) -{ - if (((unsigned) ch) <= ' ' || ch == 0x7f || - ch == '~' || ch == '^' || ch == ':' || ch == '\\') - return 1; - /* 2.13 Pattern Matching Notation */ - if (ch == '*' || ch == '?' || ch == '[') /* Unsupported */ - return 1; - return 0; -} - -/* - * Try to read one refname component from the front of refname. Return - * the length of the component found, or -1 if the component is not - * legal. - */ static int check_refname_component(const char *refname, int flags) { const char *cp; char last = '\0'; for (cp = refname; ; cp++) { - char ch = *cp; - if (ch == '\0' || ch == '/') + int ch = *cp & 255; + unsigned char disp = refname_disposition[ch]; + switch (disp) { + case 2: /* fall-through */ + case 3: + goto out; + case 4: + if (last == '.') + return -1; /* Refname contains "..". */ + break; + case 5: + if (last == '@') + return -1; /* Refname contains "@{". */ break; - if (bad_ref_char(ch)) - return -1; /* Illegal character in refname. */ - if (last == '.' && ch == '.') - return -1; /* Refname contains "..". */ - if (last == '@' && ch == '{') - return -1; /* Refname contains "@{". */ + case 6: /* fall-through */ + case 7: + return -1; + } last = ch; } +out: if (cp == refname) return 0; /* Component has zero length. */ if (refname[0] == '.') { @@ -68,7 +88,7 @@ static int check_refname_component(const char *refname, int flags) return cp - refname; } -int check_refname_format(const char *refname, int flags) +static int check_refname_format_bytewise(const char *refname, int flags) { int component_len, component_count = 0; @@ -104,6 +124,195 @@ int check_refname_format(const char *refname, int flags) return 0; } +#if defined(__GNUC__) && defined(__x86_64__) +#define SSE_VECTOR_BYTES 16 + +/* Vectorized version of check_refname_format. */ +int check_refname_format(const char *refname, int flags) +{ + const char *cp = refname; + + const __m128i dot = _mm_set1_epi8('.'); + const __m128i at = _mm_set1_epi8('@'); + const __m128i curly = _mm_set1_epi8('{'); + const __m128i slash = _mm_set1_epi8('/'); + const __m128i zero = _mm_set1_epi8('\000'); + const __m128i el = _mm_set1_epi8('l'); + + /* below '*', all characters are forbidden or rare */ + const __m128i star_ub = _mm_set1_epi8('*' + 1); + + const __m128i colon = _mm_set1_epi8(':'); + const __m128i question = _mm_set1_epi8('?'); + + /* '['..'^' contains 4 characters: 3 forbidden and 1 rare */ + const __m128i bracket_lb = _mm_set1_epi8('[' - 1); + const __m128i caret_ub = _mm_set1_epi8('^' + 1); + + /* '~' and above are forbidden */ + const __m128i tilde_lb = _mm_set1_epi8('~' - 1); + + int component_count = 0; + + if (refname[0] == 0 || refname[0] == '/') { + /* entirely empty ref or initial ref component */ + return -1; + } + + /* + * Initial ref component of '.'; below we look for /. so we'll + * miss this. + */ + if (refname[0] == '.') { + if (refname[1] == '/' || refname[1] == '\0') + return -1; + if (!(flags & REFNAME_DOT_COMPONENT)) + return -1; + } + while(1) { + __m128i tmp, tmp1, result; + uint64_t mask; + + if ((uintptr_t) cp % PAGE_SIZE > PAGE_SIZE - SSE_VECTOR_BYTES - 1) + /* + * End-of-page; fall back to slow method for + * this entire ref. + */ + return check_refname_format_bytewise(refname, flags); + + tmp = _mm_loadu_si128((__m128i *)cp); + tmp1 = _mm_loadu_si128((__m128i *)(cp + 1)); + + /* + * This range (note the lt) contains some + * permissible-but-rare characters (including all + * characters >= 128), which we handle later. It also + * includes \000. + */ + result = _mm_cmplt_epi8(tmp, star_ub); + + result = _mm_or_si128(result, _mm_cmpeq_epi8(tmp, question)); + result = _mm_or_si128(result, _mm_cmpeq_epi8(tmp, colon)); + + /* This range contains the permissible ] as bycatch */ + result = _mm_or_si128(result, _mm_and_si128( + _mm_cmpgt_epi8(tmp, bracket_lb), + _mm_cmplt_epi8(tmp, caret_ub))); + + result = _mm_or_si128(result, _mm_cmpgt_epi8(tmp, tilde_lb)); + + /* .. */ + result = _mm_or_si128(result, _mm_and_si128( + _mm_cmpeq_epi8(tmp, dot), + _mm_cmpeq_epi8(tmp1, dot))); + /* @{ */ + result = _mm_or_si128(result, _mm_and_si128( + _mm_cmpeq_epi8(tmp, at), + _mm_cmpeq_epi8(tmp1, curly))); + /* // */ + result = _mm_or_si128(result, _mm_and_si128( + _mm_cmpeq_epi8(tmp, slash), + _mm_cmpeq_epi8(tmp1, slash))); + /* trailing / */ + result = _mm_or_si128(result, _mm_and_si128( + _mm_cmpeq_epi8(tmp, slash), + _mm_cmpeq_epi8(tmp1, zero))); + /* .l, beginning of .lock */ + result = _mm_or_si128(result, _mm_and_si128( + _mm_cmpeq_epi8(tmp, dot), + _mm_cmpeq_epi8(tmp1, el))); + /* + * Even though /. is not necessarily an error, we flag + * it anyway. If we find it, we'll check if it's valid + * and if so we'll advance just past it. + */ + result = _mm_or_si128(result, _mm_and_si128( + _mm_cmpeq_epi8(tmp, slash), + _mm_cmpeq_epi8(tmp1, dot))); + + mask = _mm_movemask_epi8(result); + if (mask) { + /* + * We've found either end-of-string, or some + * probably-bad character or substring. + */ + int i = __builtin_ctz(mask); + switch (refname_disposition[cp[i] & 255]) { + case 0: /* fall-through */ + case 5: + /* + * bycatch: a good character that's in + * one of the ranges of mostly-forbidden + * characters + */ + cp += i + 1; + break; + case 1: + if (cp[i + 1] == '{') + return -1; + cp += i + 1; + break; + case 2: + if (!(flags & REFNAME_ALLOW_ONELEVEL) + && !component_count && !strchr(refname, '/')) + /* Refname has only one component. */ + return -1; + return 0; + case 3: + component_count ++; + /* + * Even if leading dots are allowed, don't + * allow "." as a component (".." is + * prevented by case 4 below). + */ + if (cp[i + 1] == '.') { + if (cp[i + 2] == '\0') + return -1; + if (flags & REFNAME_DOT_COMPONENT) { + /* skip to just after the /. */ + cp += i + 2; + break; + } + return -1; + } else if (cp[i + 1] == '/' || cp[i + 1] == '\0') + return -1; + break; + case 4: + if (cp[i + 1] == '.' || cp[i + 1] == '\0') + return -1; + /* .lock as end-of-component or end-of-string */ + if ((!strncmp(cp + i, ".lock", 5)) + && (cp[i + 5] == '/' || cp[i + 5] == 0)) + return -1; + cp += 1; + break; + case 6: + if (((cp == refname + i) || cp[i - 1] == '/') + && (cp[i + 1] == '/' || cp[i + 1] == 0)) + if (flags & REFNAME_REFSPEC_PATTERN) { + flags &= ~REFNAME_REFSPEC_PATTERN; + /* restart after the * */ + cp += i + 1; + continue; + } + /* fall-through */ + case 7: + return -1; + } + } else + cp += SSE_VECTOR_BYTES; + } +} + +#else + +int check_refname_format (const char *refname, int flags) +{ + return check_refname_format_bytewise(refname, flags); +} + +#endif + struct ref_entry; /* @@ -1222,7 +1431,7 @@ static int resolve_gitlink_packed_ref(struct ref_cache *refs, if (ref == NULL) return -1; - memcpy(sha1, ref->u.value.sha1, 20); + hashcpy(sha1, ref->u.value.sha1); return 0; } @@ -1477,7 +1686,7 @@ static int filter_refs(const char *refname, const unsigned char *sha1, int flags void *data) { struct ref_filter *filter = (struct ref_filter *)data; - if (fnmatch(filter->pattern, refname, 0)) + if (wildmatch(filter->pattern, refname, 0, NULL)) return 0; return filter->fn(refname, sha1, flags, filter->cb_data); } @@ -1611,6 +1820,7 @@ int peel_ref(const char *refname, unsigned char *sha1) struct warn_if_dangling_data { FILE *fp; const char *refname; + const struct string_list *refnames; const char *msg_fmt; }; @@ -1625,8 +1835,12 @@ static int warn_if_dangling_symref(const char *refname, const unsigned char *sha return 0; resolves_to = resolve_ref_unsafe(refname, junk, 0, NULL); - if (!resolves_to || strcmp(resolves_to, d->refname)) + if (!resolves_to + || (d->refname + ? strcmp(resolves_to, d->refname) + : !string_list_has_string(d->refnames, resolves_to))) { return 0; + } fprintf(d->fp, d->msg_fmt, refname); fputc('\n', d->fp); @@ -1639,6 +1853,18 @@ void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname) data.fp = fp; data.refname = refname; + data.refnames = NULL; + data.msg_fmt = msg_fmt; + for_each_rawref(warn_if_dangling_symref, &data); +} + +void warn_dangling_symrefs(FILE *fp, const char *msg_fmt, const struct string_list *refnames) +{ + struct warn_if_dangling_data data; + + data.fp = fp; + data.refname = NULL; + data.refnames = refnames; data.msg_fmt = msg_fmt; for_each_rawref(warn_if_dangling_symref, &data); } @@ -1999,7 +2225,6 @@ int dwim_log(const char *str, int len, unsigned char *sha1, char **log) *log = NULL; for (p = ref_rev_parse_rules; *p; p++) { - struct stat st; unsigned char hash[20]; char path[PATH_MAX]; const char *ref, *it; @@ -2008,12 +2233,9 @@ int dwim_log(const char *str, int len, unsigned char *sha1, char **log) ref = resolve_ref_unsafe(path, hash, 1, NULL); if (!ref) continue; - if (!stat(git_path("logs/%s", path), &st) && - S_ISREG(st.st_mode)) + if (reflog_exists(path)) it = path; - else if (strcmp(ref, path) && - !stat(git_path("logs/%s", ref), &st) && - S_ISREG(st.st_mode)) + else if (strcmp(ref, path) && reflog_exists(ref)) it = ref; else continue; @@ -2431,7 +2653,7 @@ static int curate_packed_ref_fn(struct ref_entry *entry, void *cb_data) return 0; } -static int repack_without_refs(const char **refnames, int n) +int repack_without_refs(const char **refnames, int n) { struct ref_dir *packed; struct string_list refs_to_delete = STRING_LIST_INIT_DUP; @@ -2930,122 +3152,133 @@ int create_symref(const char *ref_target, const char *refs_heads_master, return 0; } -static char *ref_msg(const char *line, const char *endp) -{ - const char *ep; - line += 82; - ep = memchr(line, '\n', endp - line); - if (!ep) - ep = endp; - return xmemdupz(line, ep - line); +struct read_ref_at_cb { + const char *refname; + unsigned long at_time; + int cnt; + int reccnt; + unsigned char *sha1; + int found_it; + + unsigned char osha1[20]; + unsigned char nsha1[20]; + int tz; + unsigned long date; + char **msg; + unsigned long *cutoff_time; + int *cutoff_tz; + int *cutoff_cnt; +}; + +static int read_ref_at_ent(unsigned char *osha1, unsigned char *nsha1, + const char *email, unsigned long timestamp, int tz, + const char *message, void *cb_data) +{ + struct read_ref_at_cb *cb = cb_data; + + cb->reccnt++; + cb->tz = tz; + cb->date = timestamp; + + if (timestamp <= cb->at_time || cb->cnt == 0) { + if (cb->msg) + *cb->msg = xstrdup(message); + if (cb->cutoff_time) + *cb->cutoff_time = timestamp; + if (cb->cutoff_tz) + *cb->cutoff_tz = tz; + if (cb->cutoff_cnt) + *cb->cutoff_cnt = cb->reccnt - 1; + /* + * we have not yet updated cb->[n|o]sha1 so they still + * hold the values for the previous record. + */ + if (!is_null_sha1(cb->osha1)) { + hashcpy(cb->sha1, nsha1); + if (hashcmp(cb->osha1, nsha1)) + warning("Log for ref %s has gap after %s.", + cb->refname, show_date(cb->date, cb->tz, DATE_RFC2822)); + } + else if (cb->date == cb->at_time) + hashcpy(cb->sha1, nsha1); + else if (hashcmp(nsha1, cb->sha1)) + warning("Log for ref %s unexpectedly ended on %s.", + cb->refname, show_date(cb->date, cb->tz, + DATE_RFC2822)); + hashcpy(cb->osha1, osha1); + hashcpy(cb->nsha1, nsha1); + cb->found_it = 1; + return 1; + } + hashcpy(cb->osha1, osha1); + hashcpy(cb->nsha1, nsha1); + if (cb->cnt > 0) + cb->cnt--; + return 0; +} + +static int read_ref_at_ent_oldest(unsigned char *osha1, unsigned char *nsha1, + const char *email, unsigned long timestamp, + int tz, const char *message, void *cb_data) +{ + struct read_ref_at_cb *cb = cb_data; + + if (cb->msg) + *cb->msg = xstrdup(message); + if (cb->cutoff_time) + *cb->cutoff_time = timestamp; + if (cb->cutoff_tz) + *cb->cutoff_tz = tz; + if (cb->cutoff_cnt) + *cb->cutoff_cnt = cb->reccnt; + hashcpy(cb->sha1, osha1); + if (is_null_sha1(cb->sha1)) + hashcpy(cb->sha1, nsha1); + /* We just want the first entry */ + return 1; } int read_ref_at(const char *refname, unsigned long at_time, int cnt, unsigned char *sha1, char **msg, unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt) { - const char *logfile, *logdata, *logend, *rec, *lastgt, *lastrec; - char *tz_c; - int logfd, tz, reccnt = 0; - struct stat st; - unsigned long date; - unsigned char logged_sha1[20]; - void *log_mapped; - size_t mapsz; + struct read_ref_at_cb cb; - logfile = git_path("logs/%s", refname); - logfd = open(logfile, O_RDONLY, 0); - if (logfd < 0) - die_errno("Unable to read log '%s'", logfile); - fstat(logfd, &st); - if (!st.st_size) - die("Log %s is empty.", logfile); - mapsz = xsize_t(st.st_size); - log_mapped = xmmap(NULL, mapsz, PROT_READ, MAP_PRIVATE, logfd, 0); - logdata = log_mapped; - close(logfd); + memset(&cb, 0, sizeof(cb)); + cb.refname = refname; + cb.at_time = at_time; + cb.cnt = cnt; + cb.msg = msg; + cb.cutoff_time = cutoff_time; + cb.cutoff_tz = cutoff_tz; + cb.cutoff_cnt = cutoff_cnt; + cb.sha1 = sha1; + + for_each_reflog_ent_reverse(refname, read_ref_at_ent, &cb); + + if (!cb.reccnt) + die("Log for %s is empty.", refname); + if (cb.found_it) + return 0; + + for_each_reflog_ent(refname, read_ref_at_ent_oldest, &cb); - lastrec = NULL; - rec = logend = logdata + st.st_size; - while (logdata < rec) { - reccnt++; - if (logdata < rec && *(rec-1) == '\n') - rec--; - lastgt = NULL; - while (logdata < rec && *(rec-1) != '\n') { - rec--; - if (*rec == '>') - lastgt = rec; - } - if (!lastgt) - die("Log %s is corrupt.", logfile); - date = strtoul(lastgt + 1, &tz_c, 10); - if (date <= at_time || cnt == 0) { - tz = strtoul(tz_c, NULL, 10); - if (msg) - *msg = ref_msg(rec, logend); - if (cutoff_time) - *cutoff_time = date; - if (cutoff_tz) - *cutoff_tz = tz; - if (cutoff_cnt) - *cutoff_cnt = reccnt - 1; - if (lastrec) { - if (get_sha1_hex(lastrec, logged_sha1)) - die("Log %s is corrupt.", logfile); - if (get_sha1_hex(rec + 41, sha1)) - die("Log %s is corrupt.", logfile); - if (hashcmp(logged_sha1, sha1)) { - warning("Log %s has gap after %s.", - logfile, show_date(date, tz, DATE_RFC2822)); - } - } - else if (date == at_time) { - if (get_sha1_hex(rec + 41, sha1)) - die("Log %s is corrupt.", logfile); - } - else { - if (get_sha1_hex(rec + 41, logged_sha1)) - die("Log %s is corrupt.", logfile); - if (hashcmp(logged_sha1, sha1)) { - warning("Log %s unexpectedly ended on %s.", - logfile, show_date(date, tz, DATE_RFC2822)); - } - } - munmap(log_mapped, mapsz); - return 0; - } - lastrec = rec; - if (cnt > 0) - cnt--; - } - - rec = logdata; - while (rec < logend && *rec != '>' && *rec != '\n') - rec++; - if (rec == logend || *rec == '\n') - die("Log %s is corrupt.", logfile); - date = strtoul(rec + 1, &tz_c, 10); - tz = strtoul(tz_c, NULL, 10); - if (get_sha1_hex(logdata, sha1)) - die("Log %s is corrupt.", logfile); - if (is_null_sha1(sha1)) { - if (get_sha1_hex(logdata + 41, sha1)) - die("Log %s is corrupt.", logfile); - } - if (msg) - *msg = ref_msg(logdata, logend); - munmap(log_mapped, mapsz); - - if (cutoff_time) - *cutoff_time = date; - if (cutoff_tz) - *cutoff_tz = tz; - if (cutoff_cnt) - *cutoff_cnt = reccnt; return 1; } +int reflog_exists(const char *refname) +{ + struct stat st; + + return !lstat(git_path("logs/%s", refname), &st) && + S_ISREG(st.st_mode); +} + +int delete_reflog(const char *refname) +{ + return remove_path(git_path("logs/%s", refname)); +} + static int show_one_reflog_ent(struct strbuf *sb, each_reflog_ent_fn fn, void *cb_data) { unsigned char osha1[20], nsha1[20]; @@ -3243,9 +3476,9 @@ static struct ref_lock *update_ref_lock(const char *refname, if (!lock) { const char *str = "Cannot lock the ref '%s'."; switch (onerr) { - case MSG_ON_ERR: error(str, refname); break; - case DIE_ON_ERR: die(str, refname); break; - case QUIET_ON_ERR: break; + case UPDATE_REFS_MSG_ON_ERR: error(str, refname); break; + case UPDATE_REFS_DIE_ON_ERR: die(str, refname); break; + case UPDATE_REFS_QUIET_ON_ERR: break; } } return lock; @@ -3258,15 +3491,118 @@ static int update_ref_write(const char *action, const char *refname, if (write_ref_sha1(lock, sha1, action) < 0) { const char *str = "Cannot update the ref '%s'."; switch (onerr) { - case MSG_ON_ERR: error(str, refname); break; - case DIE_ON_ERR: die(str, refname); break; - case QUIET_ON_ERR: break; + case UPDATE_REFS_MSG_ON_ERR: error(str, refname); break; + case UPDATE_REFS_DIE_ON_ERR: die(str, refname); break; + case UPDATE_REFS_QUIET_ON_ERR: break; } return 1; } return 0; } +/** + * Information needed for a single ref update. Set new_sha1 to the + * new value or to zero to delete the ref. To check the old value + * while locking the ref, set have_old to 1 and set old_sha1 to the + * value or to zero to ensure the ref does not exist before update. + */ +struct ref_update { + unsigned char new_sha1[20]; + unsigned char old_sha1[20]; + int flags; /* REF_NODEREF? */ + int have_old; /* 1 if old_sha1 is valid, 0 otherwise */ + struct ref_lock *lock; + int type; + const char refname[FLEX_ARRAY]; +}; + +/* + * Data structure for holding a reference transaction, which can + * consist of checks and updates to multiple references, carried out + * as atomically as possible. This structure is opaque to callers. + */ +struct ref_transaction { + struct ref_update **updates; + size_t alloc; + size_t nr; +}; + +struct ref_transaction *ref_transaction_begin(void) +{ + return xcalloc(1, sizeof(struct ref_transaction)); +} + +static void ref_transaction_free(struct ref_transaction *transaction) +{ + int i; + + for (i = 0; i < transaction->nr; i++) + free(transaction->updates[i]); + + free(transaction->updates); + free(transaction); +} + +void ref_transaction_rollback(struct ref_transaction *transaction) +{ + ref_transaction_free(transaction); +} + +static struct ref_update *add_update(struct ref_transaction *transaction, + const char *refname) +{ + size_t len = strlen(refname); + struct ref_update *update = xcalloc(1, sizeof(*update) + len + 1); + + strcpy((char *)update->refname, refname); + ALLOC_GROW(transaction->updates, transaction->nr + 1, transaction->alloc); + transaction->updates[transaction->nr++] = update; + return update; +} + +void ref_transaction_update(struct ref_transaction *transaction, + const char *refname, + unsigned char *new_sha1, unsigned char *old_sha1, + int flags, int have_old) +{ + struct ref_update *update = add_update(transaction, refname); + + hashcpy(update->new_sha1, new_sha1); + update->flags = flags; + update->have_old = have_old; + if (have_old) + hashcpy(update->old_sha1, old_sha1); +} + +void ref_transaction_create(struct ref_transaction *transaction, + const char *refname, + unsigned char *new_sha1, + int flags) +{ + struct ref_update *update = add_update(transaction, refname); + + assert(!is_null_sha1(new_sha1)); + hashcpy(update->new_sha1, new_sha1); + hashclr(update->old_sha1); + update->flags = flags; + update->have_old = 1; +} + +void ref_transaction_delete(struct ref_transaction *transaction, + const char *refname, + unsigned char *old_sha1, + int flags, int have_old) +{ + struct ref_update *update = add_update(transaction, refname); + + update->flags = flags; + update->have_old = have_old; + if (have_old) { + assert(!is_null_sha1(old_sha1)); + hashcpy(update->old_sha1, old_sha1); + } +} + int update_ref(const char *action, const char *refname, const unsigned char *sha1, const unsigned char *oldval, int flags, enum action_on_err onerr) @@ -3282,7 +3618,7 @@ static int ref_update_compare(const void *r1, const void *r2) { const struct ref_update * const *u1 = r1; const struct ref_update * const *u2 = r2; - return strcmp((*u1)->ref_name, (*u2)->ref_name); + return strcmp((*u1)->refname, (*u2)->refname); } static int ref_update_reject_duplicates(struct ref_update **updates, int n, @@ -3290,15 +3626,15 @@ static int ref_update_reject_duplicates(struct ref_update **updates, int n, { int i; for (i = 1; i < n; i++) - if (!strcmp(updates[i - 1]->ref_name, updates[i]->ref_name)) { + if (!strcmp(updates[i - 1]->refname, updates[i]->refname)) { const char *str = "Multiple updates for ref '%s' not allowed."; switch (onerr) { - case MSG_ON_ERR: - error(str, updates[i]->ref_name); break; - case DIE_ON_ERR: - die(str, updates[i]->ref_name); break; - case QUIET_ON_ERR: + case UPDATE_REFS_MSG_ON_ERR: + error(str, updates[i]->refname); break; + case UPDATE_REFS_DIE_ON_ERR: + die(str, updates[i]->refname); break; + case UPDATE_REFS_QUIET_ON_ERR: break; } return 1; @@ -3306,26 +3642,21 @@ static int ref_update_reject_duplicates(struct ref_update **updates, int n, return 0; } -int update_refs(const char *action, const struct ref_update **updates_orig, - int n, enum action_on_err onerr) +int ref_transaction_commit(struct ref_transaction *transaction, + const char *msg, enum action_on_err onerr) { int ret = 0, delnum = 0, i; - struct ref_update **updates; - int *types; - struct ref_lock **locks; const char **delnames; + int n = transaction->nr; + struct ref_update **updates = transaction->updates; - if (!updates_orig || !n) + if (!n) return 0; /* Allocate work space */ - updates = xmalloc(sizeof(*updates) * n); - types = xmalloc(sizeof(*types) * n); - locks = xcalloc(n, sizeof(*locks)); delnames = xmalloc(sizeof(*delnames) * n); /* Copy, sort, and reject duplicate refs */ - memcpy(updates, updates_orig, sizeof(*updates) * n); qsort(updates, n, sizeof(*updates), ref_update_compare); ret = ref_update_reject_duplicates(updates, n, onerr); if (ret) @@ -3333,35 +3664,44 @@ int update_refs(const char *action, const struct ref_update **updates_orig, /* Acquire all locks while verifying old values */ for (i = 0; i < n; i++) { - locks[i] = update_ref_lock(updates[i]->ref_name, - (updates[i]->have_old ? - updates[i]->old_sha1 : NULL), - updates[i]->flags, - &types[i], onerr); - if (!locks[i]) { + struct ref_update *update = updates[i]; + + update->lock = update_ref_lock(update->refname, + (update->have_old ? + update->old_sha1 : NULL), + update->flags, + &update->type, onerr); + if (!update->lock) { ret = 1; goto cleanup; } } /* Perform updates first so live commits remain referenced */ - for (i = 0; i < n; i++) - if (!is_null_sha1(updates[i]->new_sha1)) { - ret = update_ref_write(action, - updates[i]->ref_name, - updates[i]->new_sha1, - locks[i], onerr); - locks[i] = NULL; /* freed by update_ref_write */ + for (i = 0; i < n; i++) { + struct ref_update *update = updates[i]; + + if (!is_null_sha1(update->new_sha1)) { + ret = update_ref_write(msg, + update->refname, + update->new_sha1, + update->lock, onerr); + update->lock = NULL; /* freed by update_ref_write */ if (ret) goto cleanup; } + } /* Perform deletes now that updates are safely completed */ - for (i = 0; i < n; i++) - if (locks[i]) { - delnames[delnum++] = locks[i]->ref_name; - ret |= delete_ref_loose(locks[i], types[i]); + for (i = 0; i < n; i++) { + struct ref_update *update = updates[i]; + + if (update->lock) { + delnames[delnum++] = update->lock->ref_name; + ret |= delete_ref_loose(update->lock, update->type); } + } + ret |= repack_without_refs(delnames, delnum); for (i = 0; i < delnum; i++) unlink_or_warn(git_path("logs/%s", delnames[i])); @@ -3369,12 +3709,10 @@ int update_refs(const char *action, const struct ref_update **updates_orig, cleanup: for (i = 0; i < n; i++) - if (locks[i]) - unlock_ref(locks[i]); - free(updates); - free(types); - free(locks); + if (updates[i]->lock) + unlock_ref(updates[i]->lock); free(delnames); + ref_transaction_free(transaction); return ret; } |