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ocfs2: Allow binary names in the DLM 

The OCFS2 DLM uses strlen() to determine lock name length, which excludes
the possibility of putting binary values in the name string. Fix this by
requiring that string length be passed in as a parameter.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Mark Fasheh 2006-09-08 11:38:29 -07:00
parent e2c73698af
commit 3384f3df5e
5 changed files with 11 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
fs/ocfs2/dlm/dlmapi.h
View File

@ -182,6 +182,7 @@ enum dlm_status dlmlock(struct dlm_ctxt *dlm,
struct dlm_lockstatus *lksb,
int flags,
const char *name,
int namelen,
dlm_astlockfunc_t *ast,
void *data,
dlm_bastlockfunc_t *bast);

1
fs/ocfs2/dlm/dlmcommon.h
View File

@ -747,6 +747,7 @@ void dlm_change_lockres_owner(struct dlm_ctxt *dlm,
u8 owner);
struct dlm_lock_resource * dlm_get_lock_resource(struct dlm_ctxt *dlm,
const char *lockid,
int namelen,
int flags);
struct dlm_lock_resource *dlm_new_lockres(struct dlm_ctxt *dlm,
const char *name,

10
fs/ocfs2/dlm/dlmlock.c
View File

@ -540,8 +540,8 @@ static inline void dlm_get_next_cookie(u8 node_num, u64 *cookie)
enum dlm_status dlmlock(struct dlm_ctxt *dlm, int mode,
struct dlm_lockstatus *lksb, int flags,
const char *name, dlm_astlockfunc_t *ast, void *data,
dlm_bastlockfunc_t *bast)
const char *name, int namelen, dlm_astlockfunc_t *ast,
void *data, dlm_bastlockfunc_t *bast)
{
enum dlm_status status;
struct dlm_lock_resource *res = NULL;
@ -571,7 +571,7 @@ enum dlm_status dlmlock(struct dlm_ctxt *dlm, int mode,
recovery = (flags & LKM_RECOVERY);
if (recovery &&
(!dlm_is_recovery_lock(name, strlen(name)) || convert) ) {
(!dlm_is_recovery_lock(name, namelen) || convert) ) {
dlm_error(status);
goto error;
}
@ -643,7 +643,7 @@ enum dlm_status dlmlock(struct dlm_ctxt *dlm, int mode,
}
status = DLM_IVBUFLEN;
if (strlen(name) > DLM_LOCKID_NAME_MAX || strlen(name) < 1) {
if (namelen > DLM_LOCKID_NAME_MAX || namelen < 1) {
dlm_error(status);
goto error;
}
@ -659,7 +659,7 @@ enum dlm_status dlmlock(struct dlm_ctxt *dlm, int mode,
dlm_wait_for_recovery(dlm);
/* find or create the lock resource */
res = dlm_get_lock_resource(dlm, name, flags);
res = dlm_get_lock_resource(dlm, name, namelen, flags);
if (!res) {
status = DLM_IVLOCKID;
dlm_error(status);

4
fs/ocfs2/dlm/dlmmaster.c
View File

@ -740,6 +740,7 @@ struct dlm_lock_resource *dlm_new_lockres(struct dlm_ctxt *dlm,
*/
struct dlm_lock_resource * dlm_get_lock_resource(struct dlm_ctxt *dlm,
const char *lockid,
int namelen,
int flags)
{
struct dlm_lock_resource *tmpres=NULL, *res=NULL;
@ -748,13 +749,12 @@ struct dlm_lock_resource * dlm_get_lock_resource(struct dlm_ctxt *dlm,
int blocked = 0;
int ret, nodenum;
struct dlm_node_iter iter;
unsigned int namelen, hash;
unsigned int hash;
int tries = 0;
int bit, wait_on_recovery = 0;
BUG_ON(!lockid);
namelen = strlen(lockid);
hash = dlm_lockid_hash(lockid, namelen);
mlog(0, "get lockres %s (len %d)\n", lockid, namelen);

3
fs/ocfs2/dlm/dlmrecovery.c
View File

@ -2285,7 +2285,8 @@ static int dlm_pick_recovery_master(struct dlm_ctxt *dlm)
memset(&lksb, 0, sizeof(lksb));
ret = dlmlock(dlm, LKM_EXMODE, &lksb, LKM_NOQUEUE|LKM_RECOVERY,
DLM_RECOVERY_LOCK_NAME, dlm_reco_ast, dlm, dlm_reco_bast);
DLM_RECOVERY_LOCK_NAME, DLM_RECOVERY_LOCK_NAME_LEN,
dlm_reco_ast, dlm, dlm_reco_bast);
mlog(0, "%s: dlmlock($RECOVERY) returned %d, lksb=%d\n",
dlm->name, ret, lksb.status);