![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
| author | Junio C Hamano <gitster@pobox.com> | |
| Sun, 27 Dec 2009 18:42:00 +0000 (10:42 -0800) | ||
| committer | Junio C Hamano <gitster@pobox.com> | |
| Sun, 27 Dec 2009 18:42:00 +0000 (10:42 -0800) |
* nf/maint-fix-index-ext-len-on-be64:
read_index(): fix reading extension size on BE 64-bit archs
read_index(): fix reading extension size on BE 64-bit archs
| 1 | 2 | |||
|---|---|---|---|---|
| read-cache.c | patch | | diff1 | | diff2 | | blob | history |
diff --combined read-cache.c
index 1bbaf1cffba3058667787fc4a267b87e21a6cad3,053bcf19167ccc8b1d04365da244bc0b358831fe..9033dd3ab938e2ee7b4248ff97645414ee3688db
--- 1/read-cache.c
--- 2/read-cache.c
+++ b/read-cache.c
#include "cache-tree.h"
#include "refs.h"
#include "dir.h"
+#include "tree.h"
+#include "commit.h"
+#include "diff.h"
+#include "diffcore.h"
+#include "revision.h"
+#include "blob.h"
/* Index extensions.
*
struct index_state the_index;
+static void set_index_entry(struct index_state *istate, int nr, struct cache_entry *ce)
+{
+ istate->cache[nr] = ce;
+ add_name_hash(istate, ce);
+}
+
+static void replace_index_entry(struct index_state *istate, int nr, struct cache_entry *ce)
+{
+ struct cache_entry *old = istate->cache[nr];
+
+ remove_name_hash(old);
+ set_index_entry(istate, nr, ce);
+ istate->cache_changed = 1;
+}
+
+void rename_index_entry_at(struct index_state *istate, int nr, const char *new_name)
+{
+ struct cache_entry *old = istate->cache[nr], *new;
+ int namelen = strlen(new_name);
+
+ new = xmalloc(cache_entry_size(namelen));
+ copy_cache_entry(new, old);
+ new->ce_flags &= ~(CE_STATE_MASK | CE_NAMEMASK);
+ new->ce_flags |= (namelen >= CE_NAMEMASK ? CE_NAMEMASK : namelen);
+ memcpy(new->name, new_name, namelen + 1);
+
+ cache_tree_invalidate_path(istate->cache_tree, old->name);
+ remove_index_entry_at(istate, nr);
+ add_index_entry(istate, new, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE);
+}
+
/*
* This only updates the "non-critical" parts of the directory
* cache, ie the parts that aren't tracked by GIT, and only used
*/
void fill_stat_cache_info(struct cache_entry *ce, struct stat *st)
{
- ce->ce_ctime = st->st_ctime;
- ce->ce_mtime = st->st_mtime;
+ ce->ce_ctime.sec = (unsigned int)st->st_ctime;
+ ce->ce_mtime.sec = (unsigned int)st->st_mtime;
+ ce->ce_ctime.nsec = ST_CTIME_NSEC(*st);
+ ce->ce_mtime.nsec = ST_MTIME_NSEC(*st);
ce->ce_dev = st->st_dev;
ce->ce_ino = st->st_ino;
ce->ce_uid = st->st_uid;
if (assume_unchanged)
ce->ce_flags |= CE_VALID;
+
+ if (S_ISREG(st->st_mode))
+ ce_mark_uptodate(ce);
}
static int ce_compare_data(struct cache_entry *ce, struct stat *st)
static int ce_compare_link(struct cache_entry *ce, size_t expected_size)
{
int match = -1;
- char *target;
void *buffer;
unsigned long size;
enum object_type type;
- int len;
+ struct strbuf sb = STRBUF_INIT;
- target = xmalloc(expected_size);
- len = readlink(ce->name, target, expected_size);
- if (len != expected_size) {
- free(target);
+ if (strbuf_readlink(&sb, ce->name, expected_size))
return -1;
- }
+
buffer = read_sha1_file(ce->sha1, &type, &size);
- if (!buffer) {
- free(target);
- return -1;
+ if (buffer) {
+ if (size == sb.len)
+ match = memcmp(buffer, sb.buf, size);
+ free(buffer);
}
- if (size == expected_size)
- match = memcmp(buffer, target, size);
- free(buffer);
- free(target);
+ strbuf_release(&sb);
return match;
}
break;
case S_IFDIR:
if (S_ISGITLINK(ce->ce_mode))
- return 0;
+ return ce_compare_gitlink(ce) ? DATA_CHANGED : 0;
default:
return TYPE_CHANGED;
}
return 0;
}
+int is_empty_blob_sha1(const unsigned char *sha1)
+{
+ static const unsigned char empty_blob_sha1[20] = {
+ 0xe6,0x9d,0xe2,0x9b,0xb2,0xd1,0xd6,0x43,0x4b,0x8b,
+ 0x29,0xae,0x77,0x5a,0xd8,0xc2,0xe4,0x8c,0x53,0x91
+ };
+
+ return !hashcmp(sha1, empty_blob_sha1);
+}
+
static int ce_match_stat_basic(struct cache_entry *ce, struct stat *st)
{
unsigned int changed = 0;
changed |= TYPE_CHANGED;
break;
case S_IFGITLINK:
+ /* We ignore most of the st_xxx fields for gitlinks */
if (!S_ISDIR(st->st_mode))
changed |= TYPE_CHANGED;
else if (ce_compare_gitlink(ce))
default:
die("internal error: ce_mode is %o", ce->ce_mode);
}
- if (ce->ce_mtime != (unsigned int) st->st_mtime)
+ if (ce->ce_mtime.sec != (unsigned int)st->st_mtime)
changed |= MTIME_CHANGED;
- if (ce->ce_ctime != (unsigned int) st->st_ctime)
+ if (trust_ctime && ce->ce_ctime.sec != (unsigned int)st->st_ctime)
changed |= CTIME_CHANGED;
+#ifdef USE_NSEC
+ if (ce->ce_mtime.nsec != ST_MTIME_NSEC(*st))
+ changed |= MTIME_CHANGED;
+ if (trust_ctime && ce->ce_ctime.nsec != ST_CTIME_NSEC(*st))
+ changed |= CTIME_CHANGED;
+#endif
+
if (ce->ce_uid != (unsigned int) st->st_uid ||
ce->ce_gid != (unsigned int) st->st_gid)
changed |= OWNER_CHANGED;
if (ce->ce_size != (unsigned int) st->st_size)
changed |= DATA_CHANGED;
+ /* Racily smudged entry? */
+ if (!ce->ce_size) {
+ if (!is_empty_blob_sha1(ce->sha1))
+ changed |= DATA_CHANGED;
+ }
+
return changed;
}
-int ie_match_stat(struct index_state *istate,
+static int is_racy_timestamp(const struct index_state *istate, struct cache_entry *ce)
+{
+ return (!S_ISGITLINK(ce->ce_mode) &&
+ istate->timestamp.sec &&
+#ifdef USE_NSEC
+ /* nanosecond timestamped files can also be racy! */
+ (istate->timestamp.sec < ce->ce_mtime.sec ||
+ (istate->timestamp.sec == ce->ce_mtime.sec &&
+ istate->timestamp.nsec <= ce->ce_mtime.nsec))
+#else
+ istate->timestamp.sec <= ce->ce_mtime.sec
+#endif
+ );
+}
+
+int ie_match_stat(const struct index_state *istate,
struct cache_entry *ce, struct stat *st,
unsigned int options)
{
if (!ignore_valid && (ce->ce_flags & CE_VALID))
return 0;
+ /*
+ * Intent-to-add entries have not been added, so the index entry
+ * by definition never matches what is in the work tree until it
+ * actually gets added.
+ */
+ if (ce->ce_flags & CE_INTENT_TO_ADD)
+ return DATA_CHANGED | TYPE_CHANGED | MODE_CHANGED;
+
changed = ce_match_stat_basic(ce, st);
/*
* whose mtime are the same as the index file timestamp more
* carefully than others.
*/
- if (!changed &&
- istate->timestamp &&
- istate->timestamp <= ce->ce_mtime) {
+ if (!changed && is_racy_timestamp(istate, ce)) {
if (assume_racy_is_modified)
changed |= DATA_CHANGED;
else
return changed;
}
-int ie_modified(struct index_state *istate,
+int ie_modified(const struct index_state *istate,
struct cache_entry *ce, struct stat *st, unsigned int options)
{
int changed, changed_fs;
if (changed & (MODE_CHANGED | TYPE_CHANGED))
return changed;
- /* Immediately after read-tree or update-index --cacheinfo,
- * the length field is zero. For other cases the ce_size
- * should match the SHA1 recorded in the index entry.
+ /*
+ * Immediately after read-tree or update-index --cacheinfo,
+ * the length field is zero, as we have never even read the
+ * lstat(2) information once, and we cannot trust DATA_CHANGED
+ * returned by ie_match_stat() which in turn was returned by
+ * ce_match_stat_basic() to signal that the filesize of the
+ * blob changed. We have to actually go to the filesystem to
+ * see if the contents match, and if so, should answer "unchanged".
+ *
+ * The logic does not apply to gitlinks, as ce_match_stat_basic()
+ * already has checked the actual HEAD from the filesystem in the
+ * subproject. If ie_match_stat() already said it is different,
+ * then we know it is.
*/
- if ((changed & DATA_CHANGED) && ce->ce_size != 0)
+ if ((changed & DATA_CHANGED) &&
+ (S_ISGITLINK(ce->ce_mode) || ce->ce_size != 0))
return changed;
changed_fs = ce_modified_check_fs(ce, st);
return (c1 < c2) ? -1 : (c1 > c2) ? 1 : 0;
}
+/*
+ * df_name_compare() is identical to base_name_compare(), except it
+ * compares conflicting directory/file entries as equal. Note that
+ * while a directory name compares as equal to a regular file, they
+ * then individually compare _differently_ to a filename that has
+ * a dot after the basename (because '\0' < '.' < '/').
+ *
+ * This is used by routines that want to traverse the git namespace
+ * but then handle conflicting entries together when possible.
+ */
+int df_name_compare(const char *name1, int len1, int mode1,
+ const char *name2, int len2, int mode2)
+{
+ int len = len1 < len2 ? len1 : len2, cmp;
+ unsigned char c1, c2;
+
+ cmp = memcmp(name1, name2, len);
+ if (cmp)
+ return cmp;
+ /* Directories and files compare equal (same length, same name) */
+ if (len1 == len2)
+ return 0;
+ c1 = name1[len];
+ if (!c1 && S_ISDIR(mode1))
+ c1 = '/';
+ c2 = name2[len];
+ if (!c2 && S_ISDIR(mode2))
+ c2 = '/';
+ if (c1 == '/' && !c2)
+ return 0;
+ if (c2 == '/' && !c1)
+ return 0;
+ return c1 - c2;
+}
+
int cache_name_compare(const char *name1, int flags1, const char *name2, int flags2)
{
int len1 = flags1 & CE_NAMEMASK;
return 0;
}
-int index_name_pos(struct index_state *istate, const char *name, int namelen)
+int index_name_pos(const struct index_state *istate, const char *name, int namelen)
{
int first, last;
/* Remove entry, return true if there are more entries to go.. */
int remove_index_entry_at(struct index_state *istate, int pos)
{
+ struct cache_entry *ce = istate->cache[pos];
+
+ remove_name_hash(ce);
istate->cache_changed = 1;
istate->cache_nr--;
if (pos >= istate->cache_nr)
return 1;
}
+/*
+ * Remove all cache ententries marked for removal, that is where
+ * CE_REMOVE is set in ce_flags. This is much more effective than
+ * calling remove_index_entry_at() for each entry to be removed.
+ */
+void remove_marked_cache_entries(struct index_state *istate)
+{
+ struct cache_entry **ce_array = istate->cache;
+ unsigned int i, j;
+
+ for (i = j = 0; i < istate->cache_nr; i++) {
+ if (ce_array[i]->ce_flags & CE_REMOVE)
+ remove_name_hash(ce_array[i]);
+ else
+ ce_array[j++] = ce_array[i];
+ }
+ istate->cache_changed = 1;
+ istate->cache_nr = j;
+}
+
int remove_file_from_index(struct index_state *istate, const char *path)
{
int pos = index_name_pos(istate, path, strlen(path));
return pos;
}
-int add_file_to_index(struct index_state *istate, const char *path, int verbose)
+static int different_name(struct cache_entry *ce, struct cache_entry *alias)
{
- int size, namelen, pos;
- struct stat st;
- struct cache_entry *ce;
- unsigned ce_option = CE_MATCH_IGNORE_VALID|CE_MATCH_RACY_IS_DIRTY;
+ int len = ce_namelen(ce);
+ return ce_namelen(alias) != len || memcmp(ce->name, alias->name, len);
+}
- if (lstat(path, &st))
- die("%s: unable to stat (%s)", path, strerror(errno));
+/*
+ * If we add a filename that aliases in the cache, we will use the
+ * name that we already have - but we don't want to update the same
+ * alias twice, because that implies that there were actually two
+ * different files with aliasing names!
+ *
+ * So we use the CE_ADDED flag to verify that the alias was an old
+ * one before we accept it as
+ */
+static struct cache_entry *create_alias_ce(struct cache_entry *ce, struct cache_entry *alias)
+{
+ int len;
+ struct cache_entry *new;
+
+ if (alias->ce_flags & CE_ADDED)
+ die("Will not add file alias '%s' ('%s' already exists in index)", ce->name, alias->name);
+
+ /* Ok, create the new entry using the name of the existing alias */
+ len = ce_namelen(alias);
+ new = xcalloc(1, cache_entry_size(len));
+ memcpy(new->name, alias->name, len);
+ copy_cache_entry(new, ce);
+ free(ce);
+ return new;
+}
- if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode) && !S_ISDIR(st.st_mode))
- die("%s: can only add regular files, symbolic links or git-directories", path);
+static void record_intent_to_add(struct cache_entry *ce)
+{
+ unsigned char sha1[20];
+ if (write_sha1_file("", 0, blob_type, sha1))
+ die("cannot create an empty blob in the object database");
+ hashcpy(ce->sha1, sha1);
+}
+
+int add_to_index(struct index_state *istate, const char *path, struct stat *st, int flags)
+{
+ int size, namelen, was_same;
+ mode_t st_mode = st->st_mode;
+ struct cache_entry *ce, *alias;
+ unsigned ce_option = CE_MATCH_IGNORE_VALID|CE_MATCH_RACY_IS_DIRTY;
+ int verbose = flags & (ADD_CACHE_VERBOSE | ADD_CACHE_PRETEND);
+ int pretend = flags & ADD_CACHE_PRETEND;
+ int intent_only = flags & ADD_CACHE_INTENT;
+ int add_option = (ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE|
+ (intent_only ? ADD_CACHE_NEW_ONLY : 0));
+
+ if (!S_ISREG(st_mode) && !S_ISLNK(st_mode) && !S_ISDIR(st_mode))
+ return error("%s: can only add regular files, symbolic links or git-directories", path);
namelen = strlen(path);
- if (S_ISDIR(st.st_mode)) {
+ if (S_ISDIR(st_mode)) {
while (namelen && path[namelen-1] == '/')
namelen--;
}
ce = xcalloc(1, size);
memcpy(ce->name, path, namelen);
ce->ce_flags = namelen;
- fill_stat_cache_info(ce, &st);
+ if (!intent_only)
+ fill_stat_cache_info(ce, st);
+ else
+ ce->ce_flags |= CE_INTENT_TO_ADD;
if (trust_executable_bit && has_symlinks)
- ce->ce_mode = create_ce_mode(st.st_mode);
+ ce->ce_mode = create_ce_mode(st_mode);
else {
/* If there is an existing entry, pick the mode bits and type
* from it, otherwise assume unexecutable regular file.
int pos = index_name_pos_also_unmerged(istate, path, namelen);
ent = (0 <= pos) ? istate->cache[pos] : NULL;
- ce->ce_mode = ce_mode_from_stat(ent, st.st_mode);
+ ce->ce_mode = ce_mode_from_stat(ent, st_mode);
}
- pos = index_name_pos(istate, ce->name, namelen);
- if (0 <= pos &&
- !ce_stage(istate->cache[pos]) &&
- !ie_match_stat(istate, istate->cache[pos], &st, ce_option)) {
+ alias = index_name_exists(istate, ce->name, ce_namelen(ce), ignore_case);
+ if (alias && !ce_stage(alias) && !ie_match_stat(istate, alias, st, ce_option)) {
/* Nothing changed, really */
free(ce);
+ ce_mark_uptodate(alias);
+ alias->ce_flags |= CE_ADDED;
return 0;
}
-
- if (index_path(ce->sha1, path, &st, 1))
- die("unable to index file %s", path);
- if (add_index_entry(istate, ce, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE))
- die("unable to add %s to index",path);
- if (verbose)
+ if (!intent_only) {
+ if (index_path(ce->sha1, path, st, 1))
+ return error("unable to index file %s", path);
+ } else
+ record_intent_to_add(ce);
+
+ if (ignore_case && alias && different_name(ce, alias))
+ ce = create_alias_ce(ce, alias);
+ ce->ce_flags |= CE_ADDED;
+
+ /* It was suspected to be racily clean, but it turns out to be Ok */
+ was_same = (alias &&
+ !ce_stage(alias) &&
+ !hashcmp(alias->sha1, ce->sha1) &&
+ ce->ce_mode == alias->ce_mode);
+
+ if (pretend)
+ ;
+ else if (add_index_entry(istate, ce, add_option))
+ return error("unable to add %s to index",path);
+ if (verbose && !was_same)
printf("add '%s'\n", path);
return 0;
}
+int add_file_to_index(struct index_state *istate, const char *path, int flags)
+{
+ struct stat st;
+ if (lstat(path, &st))
+ die_errno("unable to stat '%s'", path);
+ return add_to_index(istate, path, &st, flags);
+}
+
struct cache_entry *make_cache_entry(unsigned int mode,
const unsigned char *sha1, const char *path, int stage,
int refresh)
int size, len;
struct cache_entry *ce;
- if (!verify_path(path))
+ if (!verify_path(path)) {
+ error("Invalid path '%s'", path);
return NULL;
+ }
len = strlen(path);
size = cache_entry_size(len);
* it is Ok to have a directory at the same
* path.
*/
- if (stage || istate->cache[pos]->ce_mode) {
+ if (!(istate->cache[pos]->ce_flags & CE_REMOVE)) {
retval = -1;
if (!ok_to_replace)
break;
(p->name[len] != '/') ||
memcmp(p->name, name, len))
break; /* not our subdirectory */
- if (ce_stage(p) == stage && (stage || p->ce_mode))
- /* p is at the same stage as our entry, and
+ if (ce_stage(p) == stage && !(p->ce_flags & CE_REMOVE))
+ /*
+ * p is at the same stage as our entry, and
* is a subdirectory of what we are looking
* at, so we cannot have conflicts at our
* level or anything shorter.
int ok_to_add = option & ADD_CACHE_OK_TO_ADD;
int ok_to_replace = option & ADD_CACHE_OK_TO_REPLACE;
int skip_df_check = option & ADD_CACHE_SKIP_DFCHECK;
+ int new_only = option & ADD_CACHE_NEW_ONLY;
cache_tree_invalidate_path(istate->cache_tree, ce->name);
pos = index_name_pos(istate, ce->name, ce->ce_flags);
/* existing match? Just replace it. */
if (pos >= 0) {
- istate->cache_changed = 1;
- istate->cache[pos] = ce;
+ if (!new_only)
+ replace_index_entry(istate, pos, ce);
return 0;
}
pos = -pos-1;
if (!ok_to_add)
return -1;
if (!verify_path(ce->name))
- return -1;
+ return error("Invalid path '%s'", ce->name);
if (!skip_df_check &&
check_file_directory_conflict(istate, ce, pos, ok_to_replace)) {
memmove(istate->cache + pos + 1,
istate->cache + pos,
(istate->cache_nr - pos - 1) * sizeof(ce));
- istate->cache[pos] = ce;
+ set_index_entry(istate, pos, ce);
istate->cache_changed = 1;
return 0;
}
int changed, size;
int ignore_valid = options & CE_MATCH_IGNORE_VALID;
+ if (ce_uptodate(ce))
+ return ce;
+
+ /*
+ * CE_VALID means the user promised us that the change to
+ * the work tree does not matter and told us not to worry.
+ */
+ if (!ignore_valid && (ce->ce_flags & CE_VALID)) {
+ ce_mark_uptodate(ce);
+ return ce;
+ }
+
if (lstat(ce->name, &st) < 0) {
if (err)
*err = errno;
if (ignore_valid && assume_unchanged &&
!(ce->ce_flags & CE_VALID))
; /* mark this one VALID again */
- else
+ else {
+ /*
+ * We do not mark the index itself "modified"
+ * because CE_UPTODATE flag is in-core only;
+ * we are not going to write this change out.
+ */
+ ce_mark_uptodate(ce);
return ce;
+ }
}
if (ie_modified(istate, ce, &st, options)) {
return updated;
}
-int refresh_index(struct index_state *istate, unsigned int flags, const char **pathspec, char *seen)
+static void show_file(const char * fmt, const char * name, int in_porcelain,
+ int * first, char *header_msg)
+{
+ if (in_porcelain && *first && header_msg) {
+ printf("%s\n", header_msg);
+ *first=0;
+ }
+ printf(fmt, name);
+}
+
+int refresh_index(struct index_state *istate, unsigned int flags, const char **pathspec,
+ char *seen, char *header_msg)
{
int i;
int has_errors = 0;
int allow_unmerged = (flags & REFRESH_UNMERGED) != 0;
int quiet = (flags & REFRESH_QUIET) != 0;
int not_new = (flags & REFRESH_IGNORE_MISSING) != 0;
+ int ignore_submodules = (flags & REFRESH_IGNORE_SUBMODULES) != 0;
+ int first = 1;
+ int in_porcelain = (flags & REFRESH_IN_PORCELAIN);
unsigned int options = really ? CE_MATCH_IGNORE_VALID : 0;
+ const char *needs_update_fmt;
+ const char *needs_merge_fmt;
+ needs_update_fmt = (in_porcelain ? "M\t%s\n" : "%s: needs update\n");
+ needs_merge_fmt = (in_porcelain ? "U\t%s\n" : "%s: needs merge\n");
for (i = 0; i < istate->cache_nr; i++) {
struct cache_entry *ce, *new;
int cache_errno = 0;
ce = istate->cache[i];
+ if (ignore_submodules && S_ISGITLINK(ce->ce_mode))
+ continue;
+
if (ce_stage(ce)) {
while ((i < istate->cache_nr) &&
! strcmp(istate->cache[i]->name, ce->name))
i--;
if (allow_unmerged)
continue;
- printf("%s: needs merge\n", ce->name);
+ show_file(needs_merge_fmt, ce->name, in_porcelain, &first, header_msg);
has_errors = 1;
continue;
}
}
if (quiet)
continue;
- printf("%s: needs update\n", ce->name);
+ show_file(needs_update_fmt, ce->name, in_porcelain, &first, header_msg);
has_errors = 1;
continue;
}
- istate->cache_changed = 1;
- /* You can NOT just free istate->cache[i] here, since it
- * might not be necessarily malloc()ed but can also come
- * from mmap(). */
- istate->cache[i] = new;
+
+ replace_index_entry(istate, i, new);
}
return has_errors;
}
static int verify_hdr(struct cache_header *hdr, unsigned long size)
{
- SHA_CTX c;
+ git_SHA_CTX c;
unsigned char sha1[20];
if (hdr->hdr_signature != htonl(CACHE_SIGNATURE))
return error("bad signature");
- if (hdr->hdr_version != htonl(2))
+ if (hdr->hdr_version != htonl(2) && hdr->hdr_version != htonl(3))
return error("bad index version");
- SHA1_Init(&c);
- SHA1_Update(&c, hdr, size - 20);
- SHA1_Final(sha1, &c);
+ git_SHA1_Init(&c);
+ git_SHA1_Update(&c, hdr, size - 20);
+ git_SHA1_Final(sha1, &c);
if (hashcmp(sha1, (unsigned char *)hdr + size - 20))
return error("bad index file sha1 signature");
return 0;
static void convert_from_disk(struct ondisk_cache_entry *ondisk, struct cache_entry *ce)
{
- ce->ce_ctime = ntohl(ondisk->ctime.sec);
- ce->ce_mtime = ntohl(ondisk->mtime.sec);
+ size_t len;
+ const char *name;
+
+ ce->ce_ctime.sec = ntohl(ondisk->ctime.sec);
+ ce->ce_mtime.sec = ntohl(ondisk->mtime.sec);
+ ce->ce_ctime.nsec = ntohl(ondisk->ctime.nsec);
+ ce->ce_mtime.nsec = ntohl(ondisk->mtime.nsec);
ce->ce_dev = ntohl(ondisk->dev);
ce->ce_ino = ntohl(ondisk->ino);
ce->ce_mode = ntohl(ondisk->mode);
ce->ce_size = ntohl(ondisk->size);
/* On-disk flags are just 16 bits */
ce->ce_flags = ntohs(ondisk->flags);
+
hashcpy(ce->sha1, ondisk->sha1);
- memcpy(ce->name, ondisk->name, ce_namelen(ce)+1);
+
+ len = ce->ce_flags & CE_NAMEMASK;
+
+ if (ce->ce_flags & CE_EXTENDED) {
+ struct ondisk_cache_entry_extended *ondisk2;
+ int extended_flags;
+ ondisk2 = (struct ondisk_cache_entry_extended *)ondisk;
+ extended_flags = ntohs(ondisk2->flags2) << 16;
+ /* We do not yet understand any bit out of CE_EXTENDED_FLAGS */
+ if (extended_flags & ~CE_EXTENDED_FLAGS)
+ die("Unknown index entry format %08x", extended_flags);
+ ce->ce_flags |= extended_flags;
+ name = ondisk2->name;
+ }
+ else
+ name = ondisk->name;
+
+ if (len == CE_NAMEMASK)
+ len = strlen(name);
+ /*
+ * NEEDSWORK: If the original index is crafted, this copy could
+ * go unchecked.
+ */
+ memcpy(ce->name, name, len + 1);
+}
+
+static inline size_t estimate_cache_size(size_t ondisk_size, unsigned int entries)
+{
+ long per_entry;
+
+ per_entry = sizeof(struct cache_entry) - sizeof(struct ondisk_cache_entry);
+
+ /*
+ * Alignment can cause differences. This should be "alignof", but
+ * since that's a gcc'ism, just use the size of a pointer.
+ */
+ per_entry += sizeof(void *);
+ return ondisk_size + entries*per_entry;
}
/* remember to discard_cache() before reading a different cache! */
size_t mmap_size;
errno = EBUSY;
- if (istate->alloc)
+ if (istate->initialized)
return istate->cache_nr;
errno = ENOENT;
- istate->timestamp = 0;
+ istate->timestamp.sec = 0;
+ istate->timestamp.nsec = 0;
fd = open(path, O_RDONLY);
if (fd < 0) {
if (errno == ENOENT)
return 0;
- die("index file open failed (%s)", strerror(errno));
+ die_errno("index file open failed");
}
if (fstat(fd, &st))
- die("cannot stat the open index (%s)", strerror(errno));
+ die_errno("cannot stat the open index");
errno = EINVAL;
mmap_size = xsize_t(st.st_size);
mmap = xmmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
close(fd);
if (mmap == MAP_FAILED)
- die("unable to map index file");
+ die_errno("unable to map index file");
hdr = mmap;
if (verify_hdr(hdr, mmap_size) < 0)
* has room for a few more flags, we can allocate using the same
* index size
*/
- istate->alloc = xmalloc(mmap_size);
+ istate->alloc = xmalloc(estimate_cache_size(mmap_size, istate->cache_nr));
+ istate->initialized = 1;
src_offset = sizeof(*hdr);
dst_offset = 0;
disk_ce = (struct ondisk_cache_entry *)((char *)mmap + src_offset);
ce = (struct cache_entry *)((char *)istate->alloc + dst_offset);
convert_from_disk(disk_ce, ce);
- istate->cache[i] = ce;
+ set_index_entry(istate, i, ce);
src_offset += ondisk_ce_size(ce);
dst_offset += ce_size(ce);
}
- istate->timestamp = st.st_mtime;
+ istate->timestamp.sec = st.st_mtime;
+ istate->timestamp.nsec = ST_MTIME_NSEC(st);
+
while (src_offset <= mmap_size - 20 - 8) {
/* After an array of active_nr index entries,
* there can be arbitrary number of extended
* extension name (4-byte) and section length
* in 4-byte network byte order.
*/
- unsigned long extsize;
+ uint32_t extsize;
memcpy(&extsize, (char *)mmap + src_offset + 4, 4);
extsize = ntohl(extsize);
if (read_index_extension(istate,
die("index file corrupt");
}
+int is_index_unborn(struct index_state *istate)
+{
+ return (!istate->cache_nr && !istate->alloc && !istate->timestamp.sec);
+}
+
int discard_index(struct index_state *istate)
{
istate->cache_nr = 0;
istate->cache_changed = 0;
- istate->timestamp = 0;
+ istate->timestamp.sec = 0;
+ istate->timestamp.nsec = 0;
+ istate->name_hash_initialized = 0;
+ free_hash(&istate->name_hash);
cache_tree_free(&(istate->cache_tree));
free(istate->alloc);
istate->alloc = NULL;
+ istate->initialized = 0;
/* no need to throw away allocated active_cache */
return 0;
}
+int unmerged_index(const struct index_state *istate)
+{
+ int i;
+ for (i = 0; i < istate->cache_nr; i++) {
+ if (ce_stage(istate->cache[i]))
+ return 1;
+ }
+ return 0;
+}
+
#define WRITE_BUFFER_SIZE 8192
static unsigned char write_buffer[WRITE_BUFFER_SIZE];
static unsigned long write_buffer_len;
-static int ce_write_flush(SHA_CTX *context, int fd)
+static int ce_write_flush(git_SHA_CTX *context, int fd)
{
unsigned int buffered = write_buffer_len;
if (buffered) {
- SHA1_Update(context, write_buffer, buffered);
+ git_SHA1_Update(context, write_buffer, buffered);
if (write_in_full(fd, write_buffer, buffered) != buffered)
return -1;
write_buffer_len = 0;
return 0;
}
-static int ce_write(SHA_CTX *context, int fd, void *data, unsigned int len)
+static int ce_write(git_SHA_CTX *context, int fd, void *data, unsigned int len)
{
while (len) {
unsigned int buffered = write_buffer_len;
return 0;
}
-static int write_index_ext_header(SHA_CTX *context, int fd,
+static int write_index_ext_header(git_SHA_CTX *context, int fd,
unsigned int ext, unsigned int sz)
{
ext = htonl(ext);
(ce_write(context, fd, &sz, 4) < 0)) ? -1 : 0;
}
-static int ce_flush(SHA_CTX *context, int fd)
+static int ce_flush(git_SHA_CTX *context, int fd)
{
unsigned int left = write_buffer_len;
if (left) {
write_buffer_len = 0;
- SHA1_Update(context, write_buffer, left);
+ git_SHA1_Update(context, write_buffer, left);
}
/* Flush first if not enough space for SHA1 signature */
}
/* Append the SHA1 signature at the end */
- SHA1_Final(write_buffer + left, context);
+ git_SHA1_Final(write_buffer + left, context);
left += 20;
return (write_in_full(fd, write_buffer, left) != left) ? -1 : 0;
}
* falsely clean entry due to touch-update-touch race, so we leave
* everything else as they are. We are called for entries whose
* ce_mtime match the index file mtime.
+ *
+ * Note that this actually does not do much for gitlinks, for
+ * which ce_match_stat_basic() always goes to the actual
+ * contents. The caller checks with is_racy_timestamp() which
+ * always says "no" for gitlinks, so we are not called for them ;-)
*/
struct stat st;
}
}
-static int ce_write_entry(SHA_CTX *c, int fd, struct cache_entry *ce)
+static int ce_write_entry(git_SHA_CTX *c, int fd, struct cache_entry *ce)
{
int size = ondisk_ce_size(ce);
struct ondisk_cache_entry *ondisk = xcalloc(1, size);
+ char *name;
- ondisk->ctime.sec = htonl(ce->ce_ctime);
- ondisk->ctime.nsec = 0;
- ondisk->mtime.sec = htonl(ce->ce_mtime);
- ondisk->mtime.nsec = 0;
+ ondisk->ctime.sec = htonl(ce->ce_ctime.sec);
+ ondisk->mtime.sec = htonl(ce->ce_mtime.sec);
+ ondisk->ctime.nsec = htonl(ce->ce_ctime.nsec);
+ ondisk->mtime.nsec = htonl(ce->ce_mtime.nsec);
ondisk->dev = htonl(ce->ce_dev);
ondisk->ino = htonl(ce->ce_ino);
ondisk->mode = htonl(ce->ce_mode);
ondisk->size = htonl(ce->ce_size);
hashcpy(ondisk->sha1, ce->sha1);
ondisk->flags = htons(ce->ce_flags);
- memcpy(ondisk->name, ce->name, ce_namelen(ce));
+ if (ce->ce_flags & CE_EXTENDED) {
+ struct ondisk_cache_entry_extended *ondisk2;
+ ondisk2 = (struct ondisk_cache_entry_extended *)ondisk;
+ ondisk2->flags2 = htons((ce->ce_flags & CE_EXTENDED_FLAGS) >> 16);
+ name = ondisk2->name;
+ }
+ else
+ name = ondisk->name;
+ memcpy(name, ce->name, ce_namelen(ce));
return ce_write(c, fd, ondisk, size);
}
int write_index(struct index_state *istate, int newfd)
{
- SHA_CTX c;
+ git_SHA_CTX c;
struct cache_header hdr;
- int i, err, removed;
+ int i, err, removed, extended;
struct cache_entry **cache = istate->cache;
int entries = istate->cache_nr;
+ struct stat st;
- for (i = removed = 0; i < entries; i++)
+ for (i = removed = extended = 0; i < entries; i++) {
if (cache[i]->ce_flags & CE_REMOVE)
removed++;
+ /* reduce extended entries if possible */
+ cache[i]->ce_flags &= ~CE_EXTENDED;
+ if (cache[i]->ce_flags & CE_EXTENDED_FLAGS) {
+ extended++;
+ cache[i]->ce_flags |= CE_EXTENDED;
+ }
+ }
+
hdr.hdr_signature = htonl(CACHE_SIGNATURE);
- hdr.hdr_version = htonl(2);
+ /* for extended format, increase version so older git won't try to read it */
+ hdr.hdr_version = htonl(extended ? 3 : 2);
hdr.hdr_entries = htonl(entries - removed);
- SHA1_Init(&c);
+ git_SHA1_Init(&c);
if (ce_write(&c, newfd, &hdr, sizeof(hdr)) < 0)
return -1;
struct cache_entry *ce = cache[i];
if (ce->ce_flags & CE_REMOVE)
continue;
- if (istate->timestamp &&
- istate->timestamp <= ce->ce_mtime)
+ if (!ce_uptodate(ce) && is_racy_timestamp(istate, ce))
ce_smudge_racily_clean_entry(ce);
if (ce_write_entry(&c, newfd, ce) < 0)
return -1;
/* Write extension data here */
if (istate->cache_tree) {
- struct strbuf sb;
+ struct strbuf sb = STRBUF_INIT;
- strbuf_init(&sb, 0);
cache_tree_write(&sb, istate->cache_tree);
err = write_index_ext_header(&c, newfd, CACHE_EXT_TREE, sb.len) < 0
|| ce_write(&c, newfd, sb.buf, sb.len) < 0;
if (err)
return -1;
}
- return ce_flush(&c, newfd);
+
+ if (ce_flush(&c, newfd) || fstat(newfd, &st))
+ return -1;
+ istate->timestamp.sec = (unsigned int)st.st_mtime;
+ istate->timestamp.nsec = ST_MTIME_NSEC(st);
+ return 0;
+}
+
+/*
+ * Read the index file that is potentially unmerged into given
+ * index_state, dropping any unmerged entries. Returns true if
+ * the index is unmerged. Callers who want to refuse to work
+ * from an unmerged state can call this and check its return value,
+ * instead of calling read_cache().
+ */
+int read_index_unmerged(struct index_state *istate)
+{
+ int i;
+ int unmerged = 0;
+
+ read_index(istate);
+ for (i = 0; i < istate->cache_nr; i++) {
+ struct cache_entry *ce = istate->cache[i];
+ struct cache_entry *new_ce;
+ int size, len;
+
+ if (!ce_stage(ce))
+ continue;
+ unmerged = 1;
+ len = strlen(ce->name);
+ size = cache_entry_size(len);
+ new_ce = xcalloc(1, size);
+ hashcpy(new_ce->sha1, ce->sha1);
+ memcpy(new_ce->name, ce->name, len);
+ new_ce->ce_flags = create_ce_flags(len, 0);
+ new_ce->ce_mode = ce->ce_mode;
+ if (add_index_entry(istate, new_ce, 0))
+ return error("%s: cannot drop to stage #0",
+ ce->name);
+ i = index_name_pos(istate, new_ce->name, len);
+ }
+ return unmerged;
+}
+
+struct update_callback_data
+{
+ int flags;
+ int add_errors;
+};
+
+static void update_callback(struct diff_queue_struct *q,
+ struct diff_options *opt, void *cbdata)
+{
+ int i;
+ struct update_callback_data *data = cbdata;
+
+ for (i = 0; i < q->nr; i++) {
+ struct diff_filepair *p = q->queue[i];
+ const char *path = p->one->path;
+ switch (p->status) {
+ default:
+ die("unexpected diff status %c", p->status);
+ case DIFF_STATUS_UNMERGED:
+ /*
+ * ADD_CACHE_IGNORE_REMOVAL is unset if "git
+ * add -u" is calling us, In such a case, a
+ * missing work tree file needs to be removed
+ * if there is an unmerged entry at stage #2,
+ * but such a diff record is followed by
+ * another with DIFF_STATUS_DELETED (and if
+ * there is no stage #2, we won't see DELETED
+ * nor MODIFIED). We can simply continue
+ * either way.
+ */
+ if (!(data->flags & ADD_CACHE_IGNORE_REMOVAL))
+ continue;
+ /*
+ * Otherwise, it is "git add path" is asking
+ * to explicitly add it; we fall through. A
+ * missing work tree file is an error and is
+ * caught by add_file_to_index() in such a
+ * case.
+ */
+ case DIFF_STATUS_MODIFIED:
+ case DIFF_STATUS_TYPE_CHANGED:
+ if (add_file_to_index(&the_index, path, data->flags)) {
+ if (!(data->flags & ADD_CACHE_IGNORE_ERRORS))
+ die("updating files failed");
+ data->add_errors++;
+ }
+ break;
+ case DIFF_STATUS_DELETED:
+ if (data->flags & ADD_CACHE_IGNORE_REMOVAL)
+ break;
+ if (!(data->flags & ADD_CACHE_PRETEND))
+ remove_file_from_index(&the_index, path);
+ if (data->flags & (ADD_CACHE_PRETEND|ADD_CACHE_VERBOSE))
+ printf("remove '%s'\n", path);
+ break;
+ }
+ }
+}
+
+int add_files_to_cache(const char *prefix, const char **pathspec, int flags)
+{
+ struct update_callback_data data;
+ struct rev_info rev;
+ init_revisions(&rev, prefix);
+ setup_revisions(0, NULL, &rev, NULL);
+ rev.prune_data = pathspec;
+ rev.diffopt.output_format = DIFF_FORMAT_CALLBACK;
+ rev.diffopt.format_callback = update_callback;
+ data.flags = flags;
+ data.add_errors = 0;
+ rev.diffopt.format_callback_data = &data;
+ run_diff_files(&rev, DIFF_RACY_IS_MODIFIED);
+ return !!data.add_errors;
+}
+
+/*
+ * Returns 1 if the path is an "other" path with respect to
+ * the index; that is, the path is not mentioned in the index at all,
+ * either as a file, a directory with some files in the index,
+ * or as an unmerged entry.
+ *
+ * We helpfully remove a trailing "/" from directories so that
+ * the output of read_directory can be used as-is.
+ */
+int index_name_is_other(const struct index_state *istate, const char *name,
+ int namelen)
+{
+ int pos;
+ if (namelen && name[namelen - 1] == '/')
+ namelen--;
+ pos = index_name_pos(istate, name, namelen);
+ if (0 <= pos)
+ return 0; /* exact match */
+ pos = -pos - 1;
+ if (pos < istate->cache_nr) {
+ struct cache_entry *ce = istate->cache[pos];
+ if (ce_namelen(ce) == namelen &&
+ !memcmp(ce->name, name, namelen))
+ return 0; /* Yup, this one exists unmerged */
+ }
+ return 1;
}