#define USE_THE_REPOSITORY_VARIABLE

#include "git-compat-util.h"

#include "gettext.h"

#include "hex.h"

#include "lockfile.h"

#include "tree.h"

#include "tree-walk.h"

#include "cache-tree.h"

#include "bulk-checkin.h"

#include "object-file.h"

#include "object-store-ll.h"

#include "read-cache-ll.h"

#include "replace-object.h"

#include "repository.h"

#include "promisor-remote.h"

#include "trace.h"

#include "trace2.h"

#ifndef DEBUG_CACHE_TREE

#define DEBUG_CACHE_TREE 0

#endif

struct cache_tree *cache_tree(void)

{

struct cache_tree *it = xcalloc(1, sizeof(struct cache_tree));

it->entry_count = -1;

return it;

}

void cache_tree_free(struct cache_tree **it_p)

{

int i;

struct cache_tree *it = *it_p;

if (!it)

return;

for (i = 0; i < it->subtree_nr; i++)

if (it->down[i]) {

cache_tree_free(&it->down[i]->cache_tree);

free(it->down[i]);

}

free(it->down);

free(it);

*it_p = NULL;

}

static int subtree_name_cmp(const char *one, int onelen,

const char *two, int twolen)

{

if (onelen < twolen)

return -1;

if (twolen < onelen)

return 1;

return memcmp(one, two, onelen);

}

int cache_tree_subtree_pos(struct cache_tree *it, const char *path, int pathlen)

{

struct cache_tree_sub **down = it->down;

int lo, hi;

lo = 0;

hi = it->subtree_nr;

while (lo < hi) {

int mi = lo + (hi - lo) / 2;

struct cache_tree_sub *mdl = down[mi];

int cmp = subtree_name_cmp(path, pathlen,

mdl->name, mdl->namelen);

if (!cmp)

return mi;

if (cmp < 0)

hi = mi;

else

lo = mi + 1;

}

return -lo-1;

}

static struct cache_tree_sub *find_subtree(struct cache_tree *it,

const char *path,

int pathlen,

int create)

{

struct cache_tree_sub *down;

int pos = cache_tree_subtree_pos(it, path, pathlen);

if (0 <= pos)

return it->down[pos];

if (!create)

return NULL;

pos = -pos-1;

ALLOC_GROW(it->down, it->subtree_nr + 1, it->subtree_alloc);

it->subtree_nr++;

FLEX_ALLOC_MEM(down, name, path, pathlen);

down->cache_tree = NULL;

down->namelen = pathlen;

if (pos < it->subtree_nr)

MOVE_ARRAY(it->down + pos + 1, it->down + pos,

it->subtree_nr - pos - 1);

it->down[pos] = down;

return down;

}

struct cache_tree_sub *cache_tree_sub(struct cache_tree *it, const char *path)

{

int pathlen = strlen(path);

return find_subtree(it, path, pathlen, 1);

}

static int do_invalidate_path(struct cache_tree *it, const char *path)

{

/* a/b/c

* ==> invalidate self

* ==> find "a", have it invalidate "b/c"

* a

* ==> invalidate self

* ==> if "a" exists as a subtree, remove it.

*/

const char *slash;

int namelen;

struct cache_tree_sub *down;

#if DEBUG_CACHE_TREE

fprintf(stderr, "cache-tree invalidate <%s>\n", path);

#endif

if (!it)

return 0;

slash = strchrnul(path, '/');

namelen = slash - path;

it->entry_count = -1;

if (!*slash) {

int pos;

pos = cache_tree_subtree_pos(it, path, namelen);

if (0 <= pos) {

cache_tree_free(&it->down[pos]->cache_tree);

free(it->down[pos]);

/* 0 1 2 3 4 5

* ^ ^subtree_nr = 6

* pos

* move 4 and 5 up one place (2 entries)

* 2 = 6 - 3 - 1 = subtree_nr - pos - 1

*/

MOVE_ARRAY(it->down + pos, it->down + pos + 1,

it->subtree_nr - pos - 1);

it->subtree_nr--;

}

return 1;

}

down = find_subtree(it, path, namelen, 0);

if (down)

do_invalidate_path(down->cache_tree, slash + 1);

return 1;

}

void cache_tree_invalidate_path(struct index_state *istate, const char *path)

{

if (do_invalidate_path(istate->cache_tree, path))

istate->cache_changed |= CACHE_TREE_CHANGED;

}

static int verify_cache(struct index_state *istate, int flags)

{

unsigned i, funny;

int silent = flags & WRITE_TREE_SILENT;

/* Verify that the tree is merged */

funny = 0;

for (i = 0; i < istate->cache_nr; i++) {

const struct cache_entry *ce = istate->cache[i];

if (ce_stage(ce)) {

if (silent)

return -1;

if (10 < ++funny) {

fprintf(stderr, "...\n");

break;

}

fprintf(stderr, "%s: unmerged (%s)\n",

ce->name, oid_to_hex(&ce->oid));

}

}

if (funny)

return -1;

/* Also verify that the cache does not have path and path/file

* at the same time. At this point we know the cache has only

* stage 0 entries.

*/

funny = 0;

for (i = 0; i + 1 < istate->cache_nr; i++) {

/* path/file always comes after path because of the way

* the cache is sorted. Also path can appear only once,

* which means conflicting one would immediately follow.

*/

const struct cache_entry *this_ce = istate->cache[i];

const struct cache_entry *next_ce = istate->cache[i + 1];

const char *this_name = this_ce->name;

const char *next_name = next_ce->name;

int this_len = ce_namelen(this_ce);

if (this_len < ce_namelen(next_ce) &&

next_name[this_len] == '/' &&

strncmp(this_name, next_name, this_len) == 0) {

if (10 < ++funny) {

fprintf(stderr, "...\n");

break;

}

fprintf(stderr, "You have both %s and %s\n",

this_name, next_name);

}

}

if (funny)

return -1;

return 0;

}

static void discard_unused_subtrees(struct cache_tree *it)

{

struct cache_tree_sub **down = it->down;

int nr = it->subtree_nr;

int dst, src;

for (dst = src = 0; src < nr; src++) {

struct cache_tree_sub *s = down[src];

if (s->used)

down[dst++] = s;

else {

cache_tree_free(&s->cache_tree);

free(s);

it->subtree_nr--;

}

}

}

int cache_tree_fully_valid(struct cache_tree *it)

{

int i;

if (!it)

return 0;

if (it->entry_count < 0 || !repo_has_object_file(the_repository, &it->oid))

return 0;

for (i = 0; i < it->subtree_nr; i++) {

if (!cache_tree_fully_valid(it->down[i]->cache_tree))

return 0;

}

return 1;

}

static int must_check_existence(const struct cache_entry *ce)

{

return !(repo_has_promisor_remote(the_repository) && ce_skip_worktree(ce));

}

static int update_one(struct cache_tree *it,

struct cache_entry **cache,

int entries,

const char *base,

int baselen,

int *skip_count,

int flags)

{

struct strbuf buffer;

int missing_ok = flags & WRITE_TREE_MISSING_OK;

int dryrun = flags & WRITE_TREE_DRY_RUN;

int repair = flags & WRITE_TREE_REPAIR;

int to_invalidate = 0;

int i;

assert(!(dryrun && repair));

*skip_count = 0;

/*

* If the first entry of this region is a sparse directory

* entry corresponding exactly to 'base', then this cache_tree

* struct is a "leaf" in the data structure, pointing to the

* tree OID specified in the entry.

*/

if (entries > 0) {

const struct cache_entry *ce = cache[0];

if (S_ISSPARSEDIR(ce->ce_mode) &&

ce->ce_namelen == baselen &&

!strncmp(ce->name, base, baselen)) {

it->entry_count = 1;

oidcpy(&it->oid, &ce->oid);

return 1;

}

}

if (0 <= it->entry_count && repo_has_object_file(the_repository, &it->oid))

return it->entry_count;

/*

* We first scan for subtrees and update them; we start by

* marking existing subtrees -- the ones that are unmarked

* should not be in the result.

*/

for (i = 0; i < it->subtree_nr; i++)

it->down[i]->used = 0;

/*

* Find the subtrees and update them.

*/

i = 0;

while (i < entries) {

const struct cache_entry *ce = cache[i];

struct cache_tree_sub *sub;

const char *path, *slash;

int pathlen, sublen, subcnt, subskip;

path = ce->name;

pathlen = ce_namelen(ce);

if (pathlen <= baselen || memcmp(base, path, baselen))

break; /* at the end of this level */

slash = strchr(path + baselen, '/');

if (!slash) {

i++;

continue;

}

/*

* a/bbb/c (base = a/, slash = /c)

* ==>

* path+baselen = bbb/c, sublen = 3

*/

sublen = slash - (path + baselen);

sub = find_subtree(it, path + baselen, sublen, 1);

if (!sub->cache_tree)

sub->cache_tree = cache_tree();

subcnt = update_one(sub->cache_tree,

cache + i, entries - i,

path,

baselen + sublen + 1,

&subskip,

flags);

if (subcnt < 0)

return subcnt;

if (!subcnt)

die("index cache-tree records empty sub-tree");

i += subcnt;

sub->count = subcnt; /* to be used in the next loop */

*skip_count += subskip;

sub->used = 1;

}

discard_unused_subtrees(it);

/*

* Then write out the tree object for this level.

*/

strbuf_init(&buffer, 8192);

i = 0;

while (i < entries) {

const struct cache_entry *ce = cache[i];

struct cache_tree_sub *sub = NULL;

const char *path, *slash;

int pathlen, entlen;

const struct object_id *oid;

unsigned mode;

int expected_missing = 0;

int contains_ita = 0;

int ce_missing_ok;

path = ce->name;

pathlen = ce_namelen(ce);

if (pathlen <= baselen || memcmp(base, path, baselen))

break; /* at the end of this level */

slash = strchr(path + baselen, '/');

if (slash) {

entlen = slash - (path + baselen);

sub = find_subtree(it, path + baselen, entlen, 0);

if (!sub)

die("cache-tree.c: '%.*s' in '%s' not found",

entlen, path + baselen, path);

i += sub->count;

oid = &sub->cache_tree->oid;

mode = S_IFDIR;

contains_ita = sub->cache_tree->entry_count < 0;

if (contains_ita) {

to_invalidate = 1;

expected_missing = 1;

}

}

else {

oid = &ce->oid;

mode = ce->ce_mode;

entlen = pathlen - baselen;

i++;

}

ce_missing_ok = mode == S_IFGITLINK || missing_ok ||

!must_check_existence(ce);

if (is_null_oid(oid) ||

(!ce_missing_ok && !repo_has_object_file(the_repository, oid))) {

strbuf_release(&buffer);

if (expected_missing)

return -1;

return error("invalid object %06o %s for '%.*s'",

mode, oid_to_hex(oid), entlen+baselen, path);

}

/*

* CE_REMOVE entries are removed before the index is

* written to disk. Skip them to remain consistent

* with the future on-disk index.

*/

if (ce->ce_flags & CE_REMOVE) {

*skip_count = *skip_count + 1;

continue;

}

/*

* CE_INTENT_TO_ADD entries exist in on-disk index but

* they are not part of generated trees. Invalidate up

* to root to force cache-tree users to read elsewhere.

*/

if (!sub && ce_intent_to_add(ce)) {

to_invalidate = 1;

continue;

}

/*

* "sub" can be an empty tree if all subentries are i-t-a.

*/

if (contains_ita && is_empty_tree_oid(oid, the_repository->hash_algo))

continue;

strbuf_grow(&buffer, entlen + 100);

strbuf_addf(&buffer, "%o %.*s%c", mode, entlen, path + baselen, '\0');

strbuf_add(&buffer, oid->hash, the_hash_algo->rawsz);

#if DEBUG_CACHE_TREE

fprintf(stderr, "cache-tree update-one %o %.*s\n",

mode, entlen, path + baselen);

#endif

}

if (repair) {

struct object_id oid;

hash_object_file(the_hash_algo, buffer.buf, buffer.len,

OBJ_TREE, &oid);

if (repo_has_object_file_with_flags(the_repository, &oid, OBJECT_INFO_SKIP_FETCH_OBJECT))

oidcpy(&it->oid, &oid);

else

to_invalidate = 1;

} else if (dryrun) {

hash_object_file(the_hash_algo, buffer.buf, buffer.len,

OBJ_TREE, &it->oid);

} else if (write_object_file_flags(buffer.buf, buffer.len, OBJ_TREE,

&it->oid, NULL, flags & WRITE_TREE_SILENT

? HASH_SILENT : 0)) {

strbuf_release(&buffer);

return -1;

}

strbuf_release(&buffer);

it->entry_count = to_invalidate ? -1 : i - *skip_count;

#if DEBUG_CACHE_TREE

fprintf(stderr, "cache-tree update-one (%d ent, %d subtree) %s\n",

it->entry_count, it->subtree_nr,

oid_to_hex(&it->oid));

#endif

return i;

}

int cache_tree_update(struct index_state *istate, int flags)

{

int skip, i;

i = verify_cache(istate, flags);

if (i)

return i;

if (!istate->cache_tree)

istate->cache_tree = cache_tree();

if (!(flags & WRITE_TREE_MISSING_OK) && repo_has_promisor_remote(the_repository))

prefetch_cache_entries(istate, must_check_existence);

trace_performance_enter();

trace2_region_enter("cache_tree", "update", the_repository);

begin_odb_transaction();

i = update_one(istate->cache_tree, istate->cache, istate->cache_nr,

"", 0, &skip, flags);

end_odb_transaction();

trace2_region_leave("cache_tree", "update", the_repository);

trace_performance_leave("cache_tree_update");

if (i < 0)

return i;

istate->cache_changed |= CACHE_TREE_CHANGED;

return 0;

}

static void write_one(struct strbuf *buffer, struct cache_tree *it,

const char *path, int pathlen)

{

int i;

/* One "cache-tree" entry consists of the following:

* path (NUL terminated)

* entry_count, subtree_nr ("%d %d\n")

* tree-sha1 (missing if invalid)

* subtree_nr "cache-tree" entries for subtrees.

*/

strbuf_grow(buffer, pathlen + 100);

strbuf_add(buffer, path, pathlen);

strbuf_addf(buffer, "%c%d %d\n", 0, it->entry_count, it->subtree_nr);

#if DEBUG_CACHE_TREE

if (0 <= it->entry_count)

fprintf(stderr, "cache-tree <%.*s> (%d ent, %d subtree) %s\n",

pathlen, path, it->entry_count, it->subtree_nr,

oid_to_hex(&it->oid));

else

fprintf(stderr, "cache-tree <%.*s> (%d subtree) invalid\n",

pathlen, path, it->subtree_nr);

#endif

if (0 <= it->entry_count) {

strbuf_add(buffer, it->oid.hash, the_hash_algo->rawsz);

}

for (i = 0; i < it->subtree_nr; i++) {

struct cache_tree_sub *down = it->down[i];

if (i) {

struct cache_tree_sub *prev = it->down[i-1];

if (subtree_name_cmp(down->name, down->namelen,

prev->name, prev->namelen) <= 0)

die("fatal - unsorted cache subtree");

}

write_one(buffer, down->cache_tree, down->name, down->namelen);

}

}

void cache_tree_write(struct strbuf *sb, struct cache_tree *root)

{

trace2_region_enter("cache_tree", "write", the_repository);

write_one(sb, root, "", 0);

trace2_region_leave("cache_tree", "write", the_repository);

}

static struct cache_tree *read_one(const char **buffer, unsigned long *size_p)

{

const char *buf = *buffer;

unsigned long size = *size_p;

const char *cp;

char *ep;

struct cache_tree *it;

int i, subtree_nr;

const unsigned rawsz = the_hash_algo->rawsz;

it = NULL;

/* skip name, but make sure name exists */

while (size && *buf) {

size--;

buf++;

}

if (!size)

goto free_return;

buf++; size--;

it = cache_tree();

cp = buf;

it->entry_count = strtol(cp, &ep, 10);

if (cp == ep)

goto free_return;

cp = ep;

subtree_nr = strtol(cp, &ep, 10);

if (cp == ep)

goto free_return;

while (size && *buf && *buf != '\n') {

size--;

buf++;

}

if (!size)

goto free_return;

buf++; size--;

if (0 <= it->entry_count) {

if (size < rawsz)

goto free_return;

oidread(&it->oid, (const unsigned char *)buf,

the_repository->hash_algo);

buf += rawsz;

size -= rawsz;

}

#if DEBUG_CACHE_TREE

if (0 <= it->entry_count)

fprintf(stderr, "cache-tree <%s> (%d ent, %d subtree) %s\n",

*buffer, it->entry_count, subtree_nr,

oid_to_hex(&it->oid));

else

fprintf(stderr, "cache-tree <%s> (%d subtrees) invalid\n",

*buffer, subtree_nr);

#endif

/*

* Just a heuristic -- we do not add directories that often but

* we do not want to have to extend it immediately when we do,

* hence +2.

*/

it->subtree_alloc = subtree_nr + 2;

CALLOC_ARRAY(it->down, it->subtree_alloc);

for (i = 0; i < subtree_nr; i++) {

/* read each subtree */

struct cache_tree *sub;

struct cache_tree_sub *subtree;

const char *name = buf;

sub = read_one(&buf, &size);

if (!sub)

goto free_return;

subtree = cache_tree_sub(it, name);

subtree->cache_tree = sub;

}

if (subtree_nr != it->subtree_nr)

die("cache-tree: internal error");

*buffer = buf;

*size_p = size;

return it;

free_return:

cache_tree_free(&it);

return NULL;

}

struct cache_tree *cache_tree_read(const char *buffer, unsigned long size)

{

struct cache_tree *result;

if (buffer[0])

return NULL; /* not the whole tree */

trace2_region_enter("cache_tree", "read", the_repository);

result = read_one(&buffer, &size);

trace2_region_leave("cache_tree", "read", the_repository);

return result;

}

static struct cache_tree *cache_tree_find(struct cache_tree *it, const char *path)

{

if (!it)

return NULL;

while (*path) {

const char *slash;

struct cache_tree_sub *sub;

slash = strchrnul(path, '/');

/*

* Between path and slash is the name of the subtree

* to look for.

*/

sub = find_subtree(it, path, slash - path, 0);

if (!sub)

return NULL;

it = sub->cache_tree;

path = slash;

while (*path == '/')

path++;

}

return it;

}

static int write_index_as_tree_internal(struct object_id *oid,

struct index_state *index_state,

int cache_tree_valid,

int flags,

const char *prefix)

{

if (flags & WRITE_TREE_IGNORE_CACHE_TREE) {

cache_tree_free(&index_state->cache_tree);

cache_tree_valid = 0;

}

if (!cache_tree_valid && cache_tree_update(index_state, flags) < 0)

return WRITE_TREE_UNMERGED_INDEX;

if (prefix) {

struct cache_tree *subtree;

subtree = cache_tree_find(index_state->cache_tree, prefix);

if (!subtree)

return WRITE_TREE_PREFIX_ERROR;

oidcpy(oid, &subtree->oid);

}

else

oidcpy(oid, &index_state->cache_tree->oid);

return 0;

}

struct tree* write_in_core_index_as_tree(struct repository *repo) {

struct object_id o;

int was_valid, ret;

struct index_state *index_state = repo->index;

was_valid = index_state->cache_tree &&

cache_tree_fully_valid(index_state->cache_tree);

ret = write_index_as_tree_internal(&o, index_state, was_valid, 0, NULL);

if (ret == WRITE_TREE_UNMERGED_INDEX) {

int i;

bug("there are unmerged index entries:");

for (i = 0; i < index_state->cache_nr; i++) {

const struct cache_entry *ce = index_state->cache[i];

if (ce_stage(ce))

bug("%d %.*s", ce_stage(ce),

(int)ce_namelen(ce), ce->name);

}

BUG("unmerged index entries when writing in-core index");

}

return lookup_tree(repo, &index_state->cache_tree->oid);

}

int write_index_as_tree(struct object_id *oid, struct index_state *index_state, const char *index_path, int flags, const char *prefix)

{

int entries, was_valid;

struct lock_file lock_file = LOCK_INIT;

int ret;

hold_lock_file_for_update(&lock_file, index_path, LOCK_DIE_ON_ERROR);

entries = read_index_from(index_state, index_path,

repo_get_git_dir(the_repository));

if (entries < 0) {

ret = WRITE_TREE_UNREADABLE_INDEX;

goto out;

}

was_valid = !(flags & WRITE_TREE_IGNORE_CACHE_TREE) &&

index_state->cache_tree &&

cache_tree_fully_valid(index_state->cache_tree);

ret = write_index_as_tree_internal(oid, index_state, was_valid, flags,

prefix);

if (!ret && !was_valid) {

write_locked_index(index_state, &lock_file, COMMIT_LOCK);

/* Not being able to write is fine -- we are only interested

* in updating the cache-tree part, and if the next caller

* ends up using the old index with unupdated cache-tree part

* it misses the work we did here, but that is just a

* performance penalty and not a big deal.

*/

}

out:

rollback_lock_file(&lock_file);

return ret;

}

static void prime_cache_tree_sparse_dir(struct cache_tree *it,

struct tree *tree)

{

oidcpy(&it->oid, &tree->object.oid);

it->entry_count = 1;

}

static void prime_cache_tree_rec(struct repository *r,

struct cache_tree *it,

struct tree *tree,

struct strbuf *tree_path)

{

struct tree_desc desc;

struct name_entry entry;

int cnt;

size_t base_path_len = tree_path->len;

oidcpy(&it->oid, &tree->object.oid);

init_tree_desc(&desc, &tree->object.oid, tree->buffer, tree->size);

cnt = 0;

while (tree_entry(&desc, &entry)) {

if (!S_ISDIR(entry.mode))

cnt++;

else {

struct cache_tree_sub *sub;

struct tree *subtree = lookup_tree(r, &entry.oid);

if (parse_tree(subtree) < 0)

exit(128);

sub = cache_tree_sub(it, entry.path);

sub->cache_tree = cache_tree();

/*

* Recursively-constructed subtree path is only needed when working

* in a sparse index (where it's used to determine whether the

* subtree is a sparse directory in the index).

*/

if (r->index->sparse_index) {

strbuf_setlen(tree_path, base_path_len);

strbuf_add(tree_path, entry.path, entry.pathlen);

strbuf_addch(tree_path, '/');

}

/*

* If a sparse index is in use, the directory being processed may be

* sparse. To confirm that, we can check whether an entry with that

* exact name exists in the index. If it does, the created subtree

* should be sparse. Otherwise, cache tree expansion should continue

* as normal.

*/

if (r->index->sparse_index &&

index_entry_exists(r->index, tree_path->buf, tree_path->len))

prime_cache_tree_sparse_dir(sub->cache_tree, subtree);

else

prime_cache_tree_rec(r, sub->cache_tree, subtree, tree_path);

cnt += sub->cache_tree->entry_count;

}

}

it->entry_count = cnt;

}

void prime_cache_tree(struct repository *r,

struct index_state *istate,

struct tree *tree)

{

struct strbuf tree_path = STRBUF_INIT;

trace2_region_enter("cache-tree", "prime_cache_tree", r);

cache_tree_free(&istate->cache_tree);

istate->cache_tree = cache_tree();

prime_cache_tree_rec(r, istate->cache_tree, tree, &tree_path);

strbuf_release(&tree_path);

istate->cache_changed |= CACHE_TREE_CHANGED;

trace2_region_leave("cache-tree", "prime_cache_tree", r);

}

/*

* find the cache_tree that corresponds to the current level without

* exploding the full path into textual form. The root of the

* cache tree is given as "root", and our current level is "info".

* (1) When at root level, info->prev is NULL, so it is "root" itself.

* (2) Otherwise, find the cache_tree that corresponds to one level

* above us, and find ourselves in there.

*/

static struct cache_tree *find_cache_tree_from_traversal(struct cache_tree *root,

struct traverse_info *info)

{

struct cache_tree *our_parent;

if (!info->prev)

return root;

our_parent = find_cache_tree_from_traversal(root, info->prev);

return cache_tree_find(our_parent, info->name);

}

int cache_tree_matches_traversal(struct cache_tree *root,

struct name_entry *ent,

struct traverse_info *info)

{

struct cache_tree *it;

it = find_cache_tree_from_traversal(root, info);

it = cache_tree_find(it, ent->path);

if (it && it->entry_count > 0 && oideq(&ent->oid, &it->oid))

return it->entry_count;

return 0;

}

static int verify_one_sparse(struct index_state *istate,

struct strbuf *path,

int pos)

{

struct cache_entry *ce = istate->cache[pos];

if (!S_ISSPARSEDIR(ce->ce_mode))

return error(_("directory '%s' is present in index, but not sparse"),

path->buf);

return 0;

}

/*

* Returns:

* 0 - Verification completed.

* 1 - Restart verification - a call to ensure_full_index() freed the cache

* tree that is being verified and verification needs to be restarted from

* the new toplevel cache tree.

* -1 - Verification failed.

*/

static int verify_one(struct repository *r,

struct index_state *istate,

struct cache_tree *it,

struct strbuf *path)

{

int i, pos, len = path->len;

struct strbuf tree_buf = STRBUF_INIT;

struct object_id new_oid;

int ret;

for (i = 0; i < it->subtree_nr; i++) {

strbuf_addf(path, "%s/", it->down[i]->name);

ret = verify_one(r, istate, it->down[i]->cache_tree, path);

if (ret)

goto out;

strbuf_setlen(path, len);

}

if (it->entry_count < 0 ||

/* no verification on tests (t7003) that replace trees */

lookup_replace_object(r, &it->oid) != &it->oid) {

ret = 0;

goto out;

}

if (path->len) {

/*

* If the index is sparse and the cache tree is not

* index_name_pos() may trigger ensure_full_index() which will

* free the tree that is being verified.

*/

int is_sparse = istate->sparse_index;

pos = index_name_pos(istate, path->buf, path->len);

if (is_sparse && !istate->sparse_index) {

ret = 1;

goto out;

}

if (pos >= 0) {

ret = verify_one_sparse(istate, path, pos);

goto out;

}

pos = -pos - 1;

} else {

pos = 0;

}

if (it->entry_count + pos > istate->cache_nr) {

ret = error(_("corrupted cache-tree has entries not present in index"));

goto out;

}

i = 0;

while (i < it->entry_count) {

struct cache_entry *ce = istate->cache[pos + i];

const char *slash;

struct cache_tree_sub *sub = NULL;

const struct object_id *oid;

const char *name;

unsigned mode;

int entlen;

if (ce->ce_flags & (CE_STAGEMASK | CE_INTENT_TO_ADD | CE_REMOVE)) {

ret = error(_("%s with flags 0x%x should not be in cache-tree"),

ce->name, ce->ce_flags);

goto out;

}

name = ce->name + path->len;

slash = strchr(name, '/');

if (slash) {

entlen = slash - name;

sub = find_subtree(it, ce->name + path->len, entlen, 0);

if (!sub || sub->cache_tree->entry_count < 0) {

ret = error(_("bad subtree '%.*s'"), entlen, name);

goto out;

}

oid = &sub->cache_tree->oid;

mode = S_IFDIR;

i += sub->cache_tree->entry_count;

} else {

oid = &ce->oid;

mode = ce->ce_mode;

entlen = ce_namelen(ce) - path->len;

i++;

}

strbuf_addf(&tree_buf, "%o %.*s%c", mode, entlen, name, '\0');

strbuf_add(&tree_buf, oid->hash, r->hash_algo->rawsz);

}

hash_object_file(r->hash_algo, tree_buf.buf, tree_buf.len, OBJ_TREE,

&new_oid);

if (!oideq(&new_oid, &it->oid)) {

ret = error(_("cache-tree for path %.*s does not match. "

"Expected %s got %s"), len, path->buf,

oid_to_hex(&new_oid), oid_to_hex(&it->oid));

goto out;

}

ret = 0;

out:

strbuf_setlen(path, len);

strbuf_release(&tree_buf);

return ret;

}

int cache_tree_verify(struct repository *r, struct index_state *istate)

{