-/*
+/*
Unix SMB/CIFS implementation.
stat cache code
Copyright (C) Andrew Tridgell 1992-2000
- Copyright (C) Jeremy Allison 1999-2004
+ Copyright (C) Jeremy Allison 1999-2007
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003
-
+ Copyright (C) Volker Lendecke 2007
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
-
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
+#include "memcache.h"
+#include "smbd/smbd.h"
+#include "messages.h"
+#include "smbprofile.h"
+#include "tdb_compat.h"
/****************************************************************************
Stat cache code used in unix_convert.
*****************************************************************************/
-static TDB_CONTEXT *tdb_stat_cache;
-
/**
* Add an entry into the stat cache.
*
* @param full_orig_name The original name as specified by the client
* @param orig_translated_path The name on our filesystem.
- *
- * @note Only the first strlen(orig_translated_path) characters are stored
+ *
+ * @note Only the first strlen(orig_translated_path) characters are stored
* into the cache. This means that full_orig_name will be internally
* truncated.
*
*/
-void stat_cache_add( const char *full_orig_name, const char *orig_translated_path, BOOL case_sensitive)
+void stat_cache_add( const char *full_orig_name,
+ char *translated_path,
+ bool case_sensitive)
{
- char *translated_path;
size_t translated_path_length;
- TDB_DATA data_val;
char *original_path;
size_t original_path_length;
- size_t sc_size = lp_max_stat_cache_size();
+ char saved_char;
+ TALLOC_CTX *ctx = talloc_tos();
- if (!lp_stat_cache())
+ if (!lp_stat_cache()) {
return;
-
- if (sc_size && (sc_size*1024 > tdb_stat_cache->map_size)) {
- reset_stat_cache();
}
- ZERO_STRUCT(data_val);
-
/*
* Don't cache trivial valid directory entries such as . and ..
*/
- if((*full_orig_name == '\0') || (full_orig_name[0] == '.' &&
- ((full_orig_name[1] == '\0') ||
- (full_orig_name[1] == '.' && full_orig_name[1] == '\0'))))
+ if ((*full_orig_name == '\0')
+ || ISDOT(full_orig_name) || ISDOTDOT(full_orig_name)) {
return;
+ }
/*
* If we are in case insentive mode, we don't need to
* would be a waste.
*/
- if(case_sensitive && (strcmp(full_orig_name, orig_translated_path) == 0))
+ if (case_sensitive && (strcmp(full_orig_name, translated_path) == 0)) {
return;
+ }
/*
* Remove any trailing '/' characters from the
* translated path.
*/
- translated_path = SMB_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--;
}
if(case_sensitive) {
- original_path = SMB_STRDUP(full_orig_name);
+ original_path = talloc_strdup(ctx,full_orig_name);
} else {
- original_path = strdup_upper(full_orig_name);
+ original_path = talloc_strdup_upper(ctx,full_orig_name);
}
if (!original_path) {
- SAFE_FREE(translated_path);
return;
}
if (original_path_length != translated_path_length) {
if (original_path_length < translated_path_length) {
- DEBUG(0, ("OOPS - tried to store stat cache entry for weird length paths [%s] %lu and [%s] %lu)!\n",
- original_path, (unsigned long)original_path_length, translated_path, (unsigned long)translated_path_length));
- SAFE_FREE(original_path);
- SAFE_FREE(translated_path);
+ DEBUG(0, ("OOPS - tried to store stat cache entry "
+ "for weird length paths [%s] %lu and [%s] %lu)!\n",
+ original_path,
+ (unsigned long)original_path_length,
+ translated_path,
+ (unsigned long)translated_path_length));
+ TALLOC_FREE(original_path);
return;
}
original_path_length = translated_path_length;
}
+ /* Ensure we're null terminated. */
+ saved_char = translated_path[translated_path_length];
+ translated_path[translated_path_length] = '\0';
+
/*
* New entry or replace old entry.
*/
-
- data_val.dsize = translated_path_length + 1;
- data_val.dptr = translated_path;
- if (tdb_store_bystring(tdb_stat_cache, original_path, data_val, TDB_REPLACE) != 0) {
- DEBUG(0,("stat_cache_add: Error storing entry %s -> %s\n", original_path, translated_path));
- } else {
- DEBUG(5,("stat_cache_add: Added entry (%x:size%x) %s -> %s\n",
- (unsigned int)data_val.dptr, data_val.dsize, original_path, translated_path));
- }
+ memcache_add(
+ smbd_memcache(), STAT_CACHE,
+ data_blob_const(original_path, original_path_length),
+ data_blob_const(translated_path, translated_path_length + 1));
- SAFE_FREE(original_path);
- SAFE_FREE(translated_path);
+ DEBUG(5,("stat_cache_add: Added entry (%lx:size %x) %s -> %s\n",
+ (unsigned long)translated_path,
+ (unsigned int)translated_path_length,
+ original_path,
+ translated_path));
+
+ translated_path[translated_path_length] = saved_char;
+ TALLOC_FREE(original_path);
}
/**
*
* @param conn A connection struct to do the stat() with.
* @param name The path we are attempting to cache, modified by this routine
- * to be correct as far as the cache can tell us
- * @param dirpath The path as far as the stat cache told us.
- * @param start A pointer into name, for where to 'start' in fixing the rest of the name up.
+ * to be correct as far as the cache can tell us. We assume that
+ * it is a talloc'ed string from top of stack, we free it if
+ * necessary.
+ * @param dirpath The path as far as the stat cache told us. Also talloced
+ * from top of stack.
+ * @param start A pointer into name, for where to 'start' in fixing the rest
+ * of the name up.
* @param psd A stat buffer, NOT from the cache, but just a side-effect.
*
- * @return True if we translated (and did a scuccessful stat on) the entire name.
+ * @return True if we translated (and did a scuccessful stat on) the entire
+ * name.
*
*/
-BOOL stat_cache_lookup(connection_struct *conn, pstring name, pstring dirpath,
- char **start, SMB_STRUCT_STAT *pst)
+bool stat_cache_lookup(connection_struct *conn,
+ char **pp_name,
+ char **pp_dirpath,
+ char **pp_start,
+ SMB_STRUCT_STAT *pst)
{
char *chk_name;
size_t namelen;
- BOOL sizechanged = False;
+ bool sizechanged = False;
unsigned int num_components = 0;
+ char *translated_path;
+ size_t translated_path_length;
+ DATA_BLOB data_val;
+ char *name;
+ TALLOC_CTX *ctx = talloc_tos();
+ struct smb_filename smb_fname;
- if (!lp_stat_cache())
+ *pp_dirpath = NULL;
+ *pp_start = *pp_name;
+
+ if (!lp_stat_cache()) {
return False;
-
- namelen = strlen(name);
+ }
- *start = name;
+ name = *pp_name;
+ namelen = strlen(name);
DO_PROFILE_INC(statcache_lookups);
/*
* Don't lookup trivial valid directory entries.
*/
- if((*name == '\0') || (name[0] == '.' &&
- ((name[1] == '\0') ||
- (name[1] == '.' && name[1] == '\0'))))
+ if ((*name == '\0') || ISDOT(name) || ISDOTDOT(name)) {
return False;
+ }
if (conn->case_sensitive) {
- chk_name = SMB_STRDUP(name);
+ chk_name = talloc_strdup(ctx,name);
if (!chk_name) {
DEBUG(0, ("stat_cache_lookup: strdup failed!\n"));
return False;
}
} else {
- chk_name = strdup_upper(name);
+ chk_name = talloc_strdup_upper(ctx,name);
if (!chk_name) {
- DEBUG(0, ("stat_cache_lookup: strdup_upper failed!\n"));
+ DEBUG(0, ("stat_cache_lookup: talloc_strdup_upper failed!\n"));
return False;
}
* if we uppercase. We need to treat this differently
* below.
*/
- if (strlen(chk_name) != namelen)
+ if (strlen(chk_name) != namelen) {
sizechanged = True;
+ }
}
while (1) {
- TDB_DATA data_val;
char *sp;
- data_val = tdb_fetch_bystring(tdb_stat_cache, chk_name);
- if(data_val.dptr == NULL || data_val.dsize == 0) {
- DEBUG(10,("stat_cache_lookup: lookup failed for name [%s]\n", chk_name ));
+ data_val = data_blob_null;
+
+ if (memcache_lookup(
+ smbd_memcache(), STAT_CACHE,
+ data_blob_const(chk_name, strlen(chk_name)),
+ &data_val)) {
+ break;
+ }
+
+ DEBUG(10,("stat_cache_lookup: lookup failed for name [%s]\n",
+ chk_name ));
+ /*
+ * Didn't find it - remove last component for next try.
+ */
+ if (!(sp = strrchr_m(chk_name, '/'))) {
/*
- * Didn't find it - remove last component for next try.
+ * We reached the end of the name - no match.
*/
- 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++;
+ DO_PROFILE_INC(statcache_misses);
+ TALLOC_FREE(chk_name);
+ return False;
+ }
- } else {
- /*
- * We reached the end of the name - no match.
- */
- DO_PROFILE_INC(statcache_misses);
- SAFE_FREE(chk_name);
- return False;
- }
- if((*chk_name == '\0') || (strcmp(chk_name, ".") == 0)
- || (strcmp(chk_name, "..") == 0)) {
- DO_PROFILE_INC(statcache_misses);
- SAFE_FREE(chk_name);
- return False;
- }
+ *sp = '\0';
+
+ /*
+ * Count the number of times we have done this, we'll
+ * need it when reconstructing the string.
+ */
+
+ if (sizechanged) {
+ num_components++;
+ }
+
+ if ((*chk_name == '\0')
+ || ISDOT(chk_name) || ISDOTDOT(chk_name)) {
+ DO_PROFILE_INC(statcache_misses);
+ TALLOC_FREE(chk_name);
+ return False;
+ }
+ }
+
+ translated_path = talloc_strdup(ctx,(char *)data_val.data);
+ if (!translated_path) {
+ smb_panic("talloc failed");
+ }
+ translated_path_length = data_val.length - 1;
+
+ DEBUG(10,("stat_cache_lookup: lookup succeeded for name [%s] "
+ "-> [%s]\n", chk_name, translated_path ));
+ DO_PROFILE_INC(statcache_hits);
+
+ ZERO_STRUCT(smb_fname);
+ smb_fname.base_name = translated_path;
+
+ if (SMB_VFS_STAT(conn, &smb_fname) != 0) {
+ /* Discard this entry - it doesn't exist in the filesystem. */
+ memcache_delete(smbd_memcache(), STAT_CACHE,
+ data_blob_const(chk_name, strlen(chk_name)));
+ TALLOC_FREE(chk_name);
+ TALLOC_FREE(translated_path);
+ return False;
+ }
+ *pst = smb_fname.st;
+
+ if (!sizechanged) {
+ memcpy(*pp_name, translated_path,
+ MIN(namelen, translated_path_length));
+ } else {
+ if (num_components == 0) {
+ name = talloc_strndup(ctx, translated_path,
+ translated_path_length);
} else {
- BOOL retval;
- char *translated_path = data_val.dptr;
- size_t translated_path_length = data_val.dsize - 1;
-
- DEBUG(10,("stat_cache_lookup: lookup succeeded for name [%s] -> [%s]\n", chk_name, translated_path ));
- DO_PROFILE_INC(statcache_hits);
- if(SMB_VFS_STAT(conn,translated_path, pst) != 0) {
- /* Discard this entry - it doesn't exist in the filesystem. */
- tdb_delete_bystring(tdb_stat_cache, chk_name);
- SAFE_FREE(chk_name);
- SAFE_FREE(data_val.dptr);
- return False;
- }
+ char *sp;
- if (!sizechanged) {
- memcpy(name, translated_path, MIN(sizeof(pstring)-1, translated_path_length));
- } else if (num_components == 0) {
- pstrcpy(name, translated_path);
+ sp = strnrchr_m(name, '/', num_components);
+ if (sp) {
+ name = talloc_asprintf(ctx,"%.*s%s",
+ (int)translated_path_length,
+ translated_path, sp);
} else {
- sp = strnrchr_m(name, '/', num_components);
- if (sp) {
- pstring last_component;
- pstrcpy(last_component, sp);
- pstrcpy(name, translated_path);
- pstrcat(name, last_component);
- } else {
- pstrcpy(name, translated_path);
- }
+ name = talloc_strndup(ctx,
+ translated_path,
+ translated_path_length);
}
+ }
+ if (name == NULL) {
+ /*
+ * TODO: Get us out of here with a real error message
+ */
+ smb_panic("talloc failed");
+ }
+ TALLOC_FREE(*pp_name);
+ *pp_name = name;
+ }
- /* set pointer for 'where to start' on fixing the rest of the name */
- *start = &name[translated_path_length];
- if(**start == '/')
- ++*start;
- pstrcpy(dirpath, translated_path);
- retval = (namelen == translated_path_length) ? True : False;
- SAFE_FREE(chk_name);
- SAFE_FREE(data_val.dptr);
- return retval;
- }
+ /* set pointer for 'where to start' on fixing the rest of the name */
+ *pp_start = &name[translated_path_length];
+ if (**pp_start == '/') {
+ ++*pp_start;
}
+
+ *pp_dirpath = translated_path;
+ TALLOC_FREE(chk_name);
+ return (namelen == translated_path_length);
+}
+
+/***************************************************************************
+ Tell all smbd's to delete an entry.
+**************************************************************************/
+
+void send_stat_cache_delete_message(struct messaging_context *msg_ctx,
+ const char *name)
+{
+#ifdef DEVELOPER
+ message_send_all(msg_ctx,
+ MSG_SMB_STAT_CACHE_DELETE,
+ name,
+ strlen(name)+1,
+ NULL);
+#endif
+}
+
+/***************************************************************************
+ Delete an entry.
+**************************************************************************/
+
+void stat_cache_delete(const char *name)
+{
+ char *lname = talloc_strdup_upper(talloc_tos(), name);
+
+ if (!lname) {
+ return;
+ }
+ DEBUG(10,("stat_cache_delete: deleting name [%s] -> %s\n",
+ lname, name ));
+
+ memcache_delete(smbd_memcache(), STAT_CACHE,
+ data_blob_const(lname, talloc_get_size(lname)-1));
+ TALLOC_FREE(lname);
}
/***************************************************************
The function returns the bucket index number for the hashed key.
JRA. Use a djb-algorithm hash for speed.
***************************************************************/
-
-u32 fast_string_hash(TDB_DATA *key)
+
+unsigned int fast_string_hash(TDB_DATA *key)
{
- u32 n = 0;
+ unsigned int n = 0;
const char *p;
- for (p = key->dptr; *p != '\0'; p++) {
- n = ((n << 5) + n) ^ (u32)(*p);
+ for (p = (const char *)key->dptr; *p != '\0'; p++) {
+ n = ((n << 5) + n) ^ (unsigned int)(*p);
}
return n;
}
Initializes or clears the stat cache.
**************************************************************************/
-BOOL reset_stat_cache( void )
+bool reset_stat_cache( void )
{
if (!lp_stat_cache())
return True;
- if (tdb_stat_cache) {
- tdb_close(tdb_stat_cache);
- }
+ memcache_flush(smbd_memcache(), STAT_CACHE);
- /* Create the in-memory tdb using our custom hash function. */
- tdb_stat_cache = tdb_open_ex("statcache", 1031, TDB_INTERNAL,
- (O_RDWR|O_CREAT), 0644, NULL, fast_string_hash);
-
- if (!tdb_stat_cache)
- return False;
return True;
}
git.samba.org / nivanova / samba-autobuild / .git / blobdiff