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fs: dlm: const void resource name parameter

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The resource name parameter should never be changed by DLM so we declare
it as const. At some point it is handled as a char pointer, a resource
name can be a non printable ascii string as well. This patch change it
to handle it as void pointer as it is offered by DLM API.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
This commit is contained in:
Alexander Aring 2022-08-15 15:43:27 -04:00 committed by David Teigland
parent 9cb16d4271
commit 56171e0db2
4 changed files with 17 additions and 14 deletions
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23
fs/dlm/lock.c
View file

@ -401,7 +401,7 @@ static int pre_rsb_struct(struct dlm_ls *ls)
unlock any spinlocks, go back and call pre_rsb_struct again.
Otherwise, take an rsb off the list and return it. */
static int get_rsb_struct(struct dlm_ls *ls, char *name, int len,
static int get_rsb_struct(struct dlm_ls *ls, const void *name, int len,
struct dlm_rsb **r_ret)
{
struct dlm_rsb *r;
@ -412,7 +412,8 @@ static int get_rsb_struct(struct dlm_ls *ls, char *name, int len,
count = ls->ls_new_rsb_count;
spin_unlock(&ls->ls_new_rsb_spin);
log_debug(ls, "find_rsb retry %d %d %s",
count, dlm_config.ci_new_rsb_count, name);
count, dlm_config.ci_new_rsb_count,
(const char *)name);
return -EAGAIN;
}
@ -448,7 +449,7 @@ static int rsb_cmp(struct dlm_rsb *r, const char *name, int nlen)
return memcmp(r->res_name, maxname, DLM_RESNAME_MAXLEN);
}
int dlm_search_rsb_tree(struct rb_root *tree, char *name, int len,
int dlm_search_rsb_tree(struct rb_root *tree, const void *name, int len,
struct dlm_rsb **r_ret)
{
struct rb_node *node = tree->rb_node;
@ -546,7 +547,7 @@ static int rsb_insert(struct dlm_rsb *rsb, struct rb_root *tree)
* while that rsb has a potentially stale master.)
*/
static int find_rsb_dir(struct dlm_ls *ls, char *name, int len,
static int find_rsb_dir(struct dlm_ls *ls, const void *name, int len,
uint32_t hash, uint32_t b,
int dir_nodeid, int from_nodeid,
unsigned int flags, struct dlm_rsb **r_ret)
@ -724,7 +725,7 @@ static int find_rsb_dir(struct dlm_ls *ls, char *name, int len,
dlm_recover_locks) before we've made ourself master (in
dlm_recover_masters). */
static int find_rsb_nodir(struct dlm_ls *ls, char *name, int len,
static int find_rsb_nodir(struct dlm_ls *ls, const void *name, int len,
uint32_t hash, uint32_t b,
int dir_nodeid, int from_nodeid,
unsigned int flags, struct dlm_rsb **r_ret)
@ -818,8 +819,9 @@ static int find_rsb_nodir(struct dlm_ls *ls, char *name, int len,
return error;
}
static int find_rsb(struct dlm_ls *ls, char *name, int len, int from_nodeid,
unsigned int flags, struct dlm_rsb **r_ret)
static int find_rsb(struct dlm_ls *ls, const void *name, int len,
int from_nodeid, unsigned int flags,
struct dlm_rsb **r_ret)
{
uint32_t hash, b;
int dir_nodeid;
@ -3320,8 +3322,9 @@ static int _cancel_lock(struct dlm_rsb *r, struct dlm_lkb *lkb)
* request_lock(), convert_lock(), unlock_lock(), cancel_lock()
*/
static int request_lock(struct dlm_ls *ls, struct dlm_lkb *lkb, char *name,
int len, struct dlm_args *args)
static int request_lock(struct dlm_ls *ls, struct dlm_lkb *lkb,
const void *name, int len,
struct dlm_args *args)
{
struct dlm_rsb *r;
int error;
@ -3420,7 +3423,7 @@ int dlm_lock(dlm_lockspace_t *lockspace,
int mode,
struct dlm_lksb *lksb,
uint32_t flags,
void *name,
const void *name,
unsigned int namelen,
uint32_t parent_lkid,
void (*ast) (void *astarg),

2
fs/dlm/lock.h
View file

@ -36,7 +36,7 @@ static inline void dlm_adjust_timeouts(struct dlm_ls *ls) { }
int dlm_master_lookup(struct dlm_ls *ls, int nodeid, char *name, int len,
unsigned int flags, int *r_nodeid, int *result);
int dlm_search_rsb_tree(struct rb_root *tree, char *name, int len,
int dlm_search_rsb_tree(struct rb_root *tree, const void *name, int len,
struct dlm_rsb **r_ret);
void dlm_recover_purge(struct dlm_ls *ls);

2
include/linux/dlm.h
View file

@ -131,7 +131,7 @@ int dlm_lock(dlm_lockspace_t *lockspace,
int mode,
struct dlm_lksb *lksb,
uint32_t flags,
void *name,
const void *name,
unsigned int namelen,
uint32_t parent_lkid,
void (*lockast) (void *astarg),

4
include/trace/events/dlm.h
View file

@ -49,7 +49,7 @@
/* note: we begin tracing dlm_lock_start() only if ls and lkb are found */
TRACE_EVENT(dlm_lock_start,
TP_PROTO(struct dlm_ls *ls, struct dlm_lkb *lkb, void *name,
TP_PROTO(struct dlm_ls *ls, struct dlm_lkb *lkb, const void *name,
unsigned int namelen, int mode, __u32 flags),
TP_ARGS(ls, lkb, name, namelen, mode, flags),
@ -91,7 +91,7 @@ TRACE_EVENT(dlm_lock_start,
TRACE_EVENT(dlm_lock_end,
TP_PROTO(struct dlm_ls *ls, struct dlm_lkb *lkb, void *name,
TP_PROTO(struct dlm_ls *ls, struct dlm_lkb *lkb, const void *name,
unsigned int namelen, int mode, __u32 flags, int error,
bool kernel_lock),