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-rw-r--r--source3/smbd/statcache.c404
1 files changed, 220 insertions, 184 deletions
diff --git a/source3/smbd/statcache.c b/source3/smbd/statcache.c
index 44bae48990..22b8a33a1e 100644
--- a/source3/smbd/statcache.c
+++ b/source3/smbd/statcache.c
@@ -24,7 +24,6 @@
extern BOOL case_sensitive;
-
/****************************************************************************
Stat cache code used in unix_convert.
*****************************************************************************/
@@ -53,123 +52,126 @@ static hash_table stat_cache;
void stat_cache_add( const char *full_orig_name, const char *orig_translated_path)
{
- stat_cache_entry *scp;
- stat_cache_entry *found_scp;
- char *translated_path;
- size_t translated_path_length;
-
- char *original_path;
- size_t original_path_length;
-
- hash_element *hash_elem;
-
- if (!lp_stat_cache()) return;
-
- /*
- * Don't cache trivial valid directory entries.
- */
- if((*full_orig_name == '\0') || (strcmp(full_orig_name, ".") == 0) ||
- (strcmp(full_orig_name, "..") == 0))
- return;
-
- /*
- * If we are in case insentive mode, we don't need to
- * store names that need no translation - else, it
- * would be a waste.
- */
-
- if(case_sensitive && (strcmp(full_orig_name, orig_translated_path) == 0))
- return;
-
- /*
- * Remove any trailing '/' characters from the
- * translated path.
- */
-
- translated_path = strdup(orig_translated_path);
- if (!translated_path)
- return;
-
- translated_path_length = strlen(translated_path);
-
- if(translated_path[translated_path_length-1] == '/') {
- translated_path[translated_path_length-1] = '\0';
- translated_path_length--;
- }
-
- original_path = strdup(full_orig_name);
- if (!original_path) {
- SAFE_FREE(translated_path);
- return;
- }
-
- original_path_length = strlen(original_path);
-
- if(original_path[original_path_length-1] == '/') {
- original_path[original_path_length-1] = '\0';
- original_path_length--;
- }
-
- if(!case_sensitive)
- strupper(original_path);
-
- if (original_path_length != translated_path_length) {
- if (original_path_length < translated_path_length) {
- DEBUG(0, ("OOPS - tried to store stat cache entry for werid length paths [%s] %u and [%s] %u)!\n", original_path, original_path_length, translated_path, translated_path_length));
- SAFE_FREE(original_path);
- SAFE_FREE(translated_path);
- return;
- }
-
- /* we only want to store the first part of original_path,
- up to the length of translated_path */
-
- original_path[translated_path_length] = '\0';
- original_path_length = translated_path_length;
- }
-
- /*
- * Check this name doesn't exist in the cache before we
- * add it.
- */
-
- if ((hash_elem = hash_lookup(&stat_cache, original_path))) {
- found_scp = (stat_cache_entry *)(hash_elem->value);
- if (strcmp((found_scp->translated_path), orig_translated_path) == 0) {
- /* already in hash table */
- SAFE_FREE(original_path);
- SAFE_FREE(translated_path);
- return;
- }
- /* hash collision - remove before we re-add */
- hash_remove(&stat_cache, hash_elem);
- }
+ stat_cache_entry *scp;
+ stat_cache_entry *found_scp;
+ char *translated_path;
+ size_t translated_path_length;
+
+ char *original_path;
+ size_t original_path_length;
+
+ hash_element *hash_elem;
+
+ if (!lp_stat_cache())
+ return;
+
+ /*
+ * Don't cache trivial valid directory entries.
+ */
+
+ if((*full_orig_name == '\0') || (strcmp(full_orig_name, ".") == 0) ||
+ (strcmp(full_orig_name, "..") == 0))
+ return;
+
+ /*
+ * If we are in case insentive mode, we don't need to
+ * store names that need no translation - else, it
+ * would be a waste.
+ */
+
+ if(case_sensitive && (strcmp(full_orig_name, orig_translated_path) == 0))
+ return;
+
+ /*
+ * Remove any trailing '/' characters from the
+ * translated path.
+ */
+
+ translated_path = strdup(orig_translated_path);
+ if (!translated_path)
+ return;
+
+ translated_path_length = strlen(translated_path);
+
+ if(translated_path[translated_path_length-1] == '/') {
+ translated_path[translated_path_length-1] = '\0';
+ translated_path_length--;
+ }
+
+ original_path = strdup(full_orig_name);
+ if (!original_path) {
+ SAFE_FREE(translated_path);
+ return;
+ }
+
+ original_path_length = strlen(original_path);
+
+ if(original_path[original_path_length-1] == '/') {
+ original_path[original_path_length-1] = '\0';
+ original_path_length--;
+ }
+
+ if(!case_sensitive)
+ strupper_m(original_path);
+
+ if (original_path_length != translated_path_length) {
+ if (original_path_length < translated_path_length) {
+ DEBUG(0, ("OOPS - tried to store stat cache entry for werid length paths [%s] %u and [%s] %u)!\n",
+ original_path, original_path_length, translated_path, translated_path_length));
+ SAFE_FREE(original_path);
+ SAFE_FREE(translated_path);
+ return;
+ }
+
+ /* we only want to store the first part of original_path,
+ up to the length of translated_path */
+
+ original_path[translated_path_length] = '\0';
+ original_path_length = translated_path_length;
+ }
+
+ /*
+ * Check this name doesn't exist in the cache before we
+ * add it.
+ */
+
+ if ((hash_elem = hash_lookup(&stat_cache, original_path))) {
+ found_scp = (stat_cache_entry *)(hash_elem->value);
+ if (strcmp((found_scp->translated_path), orig_translated_path) == 0) {
+ /* already in hash table */
+ SAFE_FREE(original_path);
+ SAFE_FREE(translated_path);
+ return;
+ }
+ /* hash collision - remove before we re-add */
+ hash_remove(&stat_cache, hash_elem);
+ }
- /*
- * New entry.
- */
+ /*
+ * New entry.
+ */
- if((scp = (stat_cache_entry *)malloc(sizeof(stat_cache_entry)
- +original_path_length
- +translated_path_length)) == NULL) {
- DEBUG(0,("stat_cache_add: Out of memory !\n"));
- SAFE_FREE(original_path);
- SAFE_FREE(translated_path);
- return;
- }
-
- scp->original_path = scp->names;
- scp->translated_path = scp->names + original_path_length + 1;
- safe_strcpy(scp->original_path, original_path, original_path_length);
- safe_strcpy(scp->translated_path, translated_path, translated_path_length);
- scp->translated_path_length = translated_path_length;
-
- hash_insert(&stat_cache, (char *)scp, original_path);
-
- SAFE_FREE(original_path);
- SAFE_FREE(translated_path);
-
- DEBUG(5,("stat_cache_add: Added entry %s -> %s\n", scp->original_path, scp->translated_path));
+ if((scp = (stat_cache_entry *)malloc(sizeof(stat_cache_entry)
+ +original_path_length
+ +translated_path_length)) == NULL) {
+ DEBUG(0,("stat_cache_add: Out of memory !\n"));
+ SAFE_FREE(original_path);
+ SAFE_FREE(translated_path);
+ return;
+ }
+
+ scp->original_path = scp->names;
+ scp->translated_path = scp->names + original_path_length + 1;
+ safe_strcpy(scp->original_path, original_path, original_path_length);
+ safe_strcpy(scp->translated_path, translated_path, translated_path_length);
+ scp->translated_path_length = translated_path_length;
+
+ hash_insert(&stat_cache, (char *)scp, original_path);
+
+ SAFE_FREE(original_path);
+ SAFE_FREE(translated_path);
+
+ DEBUG(5,("stat_cache_add: Added entry %s -> %s\n", scp->original_path, scp->translated_path));
}
/**
@@ -191,73 +193,106 @@ void stat_cache_add( const char *full_orig_name, const char *orig_translated_pat
BOOL stat_cache_lookup(connection_struct *conn, pstring name, pstring dirpath,
char **start, SMB_STRUCT_STAT *pst)
{
- stat_cache_entry *scp;
- pstring chk_name;
- size_t namelen;
- hash_element *hash_elem;
- char *sp;
-
- if (!lp_stat_cache())
- return False;
+ stat_cache_entry *scp;
+ pstring chk_name;
+ size_t namelen;
+ hash_element *hash_elem;
+ char *sp;
+ BOOL sizechanged = False;
+ unsigned int num_components = 0;
+
+ if (!lp_stat_cache())
+ return False;
- namelen = strlen(name);
-
- *start = name;
-
- DO_PROFILE_INC(statcache_lookups);
-
- /*
- * Don't lookup trivial valid directory entries.
- */
- if((*name == '\0') || (strcmp(name, ".") == 0) || (strcmp(name, "..") == 0)) {
- DO_PROFILE_INC(statcache_misses);
- return False;
- }
-
- pstrcpy(chk_name, name);
- if(!case_sensitive)
- strupper( chk_name );
-
- while (1) {
- hash_elem = hash_lookup(&stat_cache, chk_name);
- if(hash_elem == NULL) {
- /*
- * Didn't find it - remove last component for next try.
- */
- sp = strrchr_m(chk_name, '/');
- if (sp) {
- *sp = '\0';
- } else {
- /*
- * We reached the end of the name - no match.
- */
- DO_PROFILE_INC(statcache_misses);
- return False;
- }
- if((*chk_name == '\0') || (strcmp(chk_name, ".") == 0)
- || (strcmp(chk_name, "..") == 0)) {
- DO_PROFILE_INC(statcache_misses);
- return False;
- }
- } else {
- scp = (stat_cache_entry *)(hash_elem->value);
- DO_PROFILE_INC(statcache_hits);
- if(vfs_stat(conn,scp->translated_path, pst) != 0) {
- /* Discard this entry - it doesn't exist in the filesystem. */
- hash_remove(&stat_cache, hash_elem);
- return False;
- }
- memcpy(name, scp->translated_path, MIN(sizeof(pstring)-1, scp->translated_path_length));
-
- /* set pointer for 'where to start' on fixing the rest of the name */
- *start = &name[scp->translated_path_length];
- if(**start == '/')
- ++*start;
-
- pstrcpy(dirpath, scp->translated_path);
- return (namelen == scp->translated_path_length);
- }
- }
+ namelen = strlen(name);
+
+ *start = name;
+
+ DO_PROFILE_INC(statcache_lookups);
+
+ /*
+ * Don't lookup trivial valid directory entries.
+ */
+ if((*name == '\0') || (strcmp(name, ".") == 0) || (strcmp(name, "..") == 0)) {
+ DO_PROFILE_INC(statcache_misses);
+ return False;
+ }
+
+ pstrcpy(chk_name, name);
+
+ if(!case_sensitive) {
+ strupper_m( chk_name );
+ /*
+ * In some language encodings the length changes
+ * if we uppercase. We need to treat this differently
+ * below.
+ */
+ if (strlen(chk_name) != namelen)
+ sizechanged = True;
+ }
+
+ while (1) {
+ hash_elem = hash_lookup(&stat_cache, chk_name);
+ if(hash_elem == NULL) {
+ /*
+ * Didn't find it - remove last component for next try.
+ */
+ sp = strrchr_m(chk_name, '/');
+ if (sp) {
+ *sp = '\0';
+ /*
+ * Count the number of times we have done this,
+ * we'll need it when reconstructing the string.
+ */
+ if (sizechanged)
+ num_components++;
+
+ } else {
+ /*
+ * We reached the end of the name - no match.
+ */
+ DO_PROFILE_INC(statcache_misses);
+ return False;
+ }
+ if((*chk_name == '\0') || (strcmp(chk_name, ".") == 0)
+ || (strcmp(chk_name, "..") == 0)) {
+ DO_PROFILE_INC(statcache_misses);
+ return False;
+ }
+ } else {
+ scp = (stat_cache_entry *)(hash_elem->value);
+ DO_PROFILE_INC(statcache_hits);
+ if(SMB_VFS_STAT(conn,scp->translated_path, pst) != 0) {
+ /* Discard this entry - it doesn't exist in the filesystem. */
+ hash_remove(&stat_cache, hash_elem);
+ return False;
+ }
+
+ if (!sizechanged) {
+ memcpy(name, scp->translated_path, MIN(sizeof(pstring)-1, scp->translated_path_length));
+ } else if (num_components == 0) {
+ pstrcpy(name, scp->translated_path);
+ } else {
+ sp = strnrchr_m(name, '/', num_components);
+ if (sp) {
+ pstring last_component;
+ pstrcpy(last_component, sp);
+ pstrcpy(name, scp->translated_path);
+ pstrcat(name, last_component);
+ } else {
+ pstrcpy(name, scp->translated_path);
+ }
+ }
+
+ /* set pointer for 'where to start' on fixing the rest of the name */
+ *start = &name[scp->translated_path_length];
+ if(**start == '/')
+ ++*start;
+
+ pstrcpy(dirpath, scp->translated_path);
+ return (namelen == scp->translated_path_length);
+ }
+ }
}
/*************************************************************************** **
@@ -271,7 +306,8 @@ BOOL stat_cache_lookup(connection_struct *conn, pstring name, pstring dirpath,
BOOL reset_stat_cache( void )
{
static BOOL initialised;
- if (!lp_stat_cache()) return True;
+ if (!lp_stat_cache())
+ return True;
if (initialised) {
hash_clear(&stat_cache);
@@ -280,4 +316,4 @@ BOOL reset_stat_cache( void )
initialised = hash_table_init( &stat_cache, INIT_STAT_CACHE_SIZE,
(compare_function)(strcmp));
return initialised;
-} /* reset_stat_cache */
+}