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add a "stat cache" boolean smb.conf option. (defaults to on)

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I think we need this so we can rule out stat cache bugs when dealing
with bug reports. If we ask a user to disable the stat cache and the
problem persists then we know it isn't a stat cache bug. The stat
cache code is sufficiently complicated that it can be pretty hard to
tell if it is causing problems or not.
This commit is contained in:
Andrew Tridgell -
parent c96b5fde5a
commit c83f3775cd
3 changed files with 15 additions and 2 deletions
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1
source/include/proto.h
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@ -926,6 +926,7 @@ BOOL lp_unix_password_sync(void);
BOOL lp_passwd_chat_debug(void);
BOOL lp_ole_locking_compat(void);
BOOL lp_nt_smb_support(void);
BOOL lp_stat_cache(void);
int lp_os_level(void);
int lp_max_ttl(void);
int lp_max_wins_ttl(void);

4
source/param/loadparm.c
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@ -228,6 +228,7 @@ typedef struct
BOOL bOleLockingCompat;
BOOL bTimestampLogs;
BOOL bNTSmbSupport;
BOOL bStatCache;
} global;
static global Globals;
@ -643,6 +644,7 @@ static struct parm_struct parm_table[] =
{"map archive", P_BOOL, P_LOCAL, &sDefault.bMap_archive, NULL, NULL, FLAG_GLOBAL},
{"mangled names", P_BOOL, P_LOCAL, &sDefault.bMangledNames, NULL, NULL, FLAG_GLOBAL},
{"mangled map", P_STRING, P_LOCAL, &sDefault.szMangledMap, NULL, NULL, FLAG_GLOBAL},
{"stat cache", P_BOOL, P_GLOBAL, &Globals.bStatCache, NULL, NULL, 0},
{"Domain Options", P_SEP, P_SEPARATOR},
{"domain sid", P_USTRING, P_GLOBAL, &Globals.szDomainSID, NULL, NULL, 0},
@ -850,6 +852,7 @@ static void init_globals(void)
Globals.bPasswdChatDebug = False;
Globals.bOleLockingCompat = True;
Globals.bNTSmbSupport = True; /* Do NT SMB's by default. */
Globals.bStatCache = True; /* use stat cache by default */
#ifdef WITH_LDAP
/* default values for ldap */
@ -1135,6 +1138,7 @@ FN_GLOBAL_BOOL(lp_unix_password_sync,&Globals.bUnixPasswdSync)
FN_GLOBAL_BOOL(lp_passwd_chat_debug,&Globals.bPasswdChatDebug)
FN_GLOBAL_BOOL(lp_ole_locking_compat,&Globals.bOleLockingCompat)
FN_GLOBAL_BOOL(lp_nt_smb_support,&Globals.bNTSmbSupport)
FN_GLOBAL_BOOL(lp_stat_cache,&Globals.bStatCache)
FN_GLOBAL_INTEGER(lp_os_level,&Globals.os_level)
FN_GLOBAL_INTEGER(lp_max_ttl,&Globals.max_ttl)

12
source/smbd/filename.c
View File

@ -150,7 +150,11 @@ static void stat_cache_add( char *full_orig_name, char *orig_translated_path)
stat_cache_entry *scp;
pstring orig_name;
pstring translated_path;
int namelen = strlen(orig_translated_path);
int namelen;
if (!lp_stat_cache()) return;
namelen = strlen(orig_translated_path);
/*
* Don't cache trivial valid directory entries.
@ -235,7 +239,11 @@ static BOOL stat_cache_lookup( char *name, char *dirpath, char **start, SMB_STRU
{
stat_cache_entry *scp;
stat_cache_entry *longest_hit = NULL;
int namelen = strlen(name);
int namelen;
if (!lp_stat_cache()) return False;
namelen = strlen(name);
*start = name;
global_stat_cache_lookups++;