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drbd: mod_req has now a return value 

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Philipp Reisner 2010-06-09 14:07:43 +02:00
parent 288f422ec1
commit 2a80699f80
2 changed files with 16 additions and 6 deletions
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5
drivers/block/drbd/drbd_req.c
View File

@ -382,10 +382,11 @@ static int _req_conflicts(struct drbd_request *req)
* and it enforces that we have to think in a very structured manner
* about the "events" that may happen to a request during its life time ...
*/
void __req_mod(struct drbd_request *req, enum drbd_req_event what,
int __req_mod(struct drbd_request *req, enum drbd_req_event what,
struct bio_and_error *m)
{
struct drbd_conf *mdev = req->mdev;
int rv = 0;
m->bio = NULL;
switch (what) {
@ -657,6 +658,8 @@ void __req_mod(struct drbd_request *req, enum drbd_req_event what,
_req_may_be_done(req, m);
break;
};
return rv;
}
/* we may do a local read if:

17
drivers/block/drbd/drbd_req.h
View File

@ -297,36 +297,43 @@ struct bio_and_error {
extern void _req_may_be_done(struct drbd_request *req,
struct bio_and_error *m);
extern void __req_mod(struct drbd_request *req, enum drbd_req_event what,
extern int __req_mod(struct drbd_request *req, enum drbd_req_event what,
struct bio_and_error *m);
extern void complete_master_bio(struct drbd_conf *mdev,
struct bio_and_error *m);
/* use this if you don't want to deal with calling complete_master_bio()
* outside the spinlock, e.g. when walking some list on cleanup. */
static inline void _req_mod(struct drbd_request *req, enum drbd_req_event what)
static inline int _req_mod(struct drbd_request *req, enum drbd_req_event what)
{
struct drbd_conf *mdev = req->mdev;
struct bio_and_error m;
int rv;
/* __req_mod possibly frees req, do not touch req after that! */
__req_mod(req, what, &m);
rv = __req_mod(req, what, &m);
if (m.bio)
complete_master_bio(mdev, &m);
return rv;
}
/* completion of master bio is outside of spinlock.
* If you need it irqsave, do it your self! */
static inline void req_mod(struct drbd_request *req,
static inline int req_mod(struct drbd_request *req,
enum drbd_req_event what)
{
struct drbd_conf *mdev = req->mdev;
struct bio_and_error m;
int rv;
spin_lock_irq(&mdev->req_lock);
__req_mod(req, what, &m);
rv = __req_mod(req, what, &m);
spin_unlock_irq(&mdev->req_lock);
if (m.bio)
complete_master_bio(mdev, &m);
return rv;
}
#endif