mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-12 19:21:04 +00:00
block: sed-opal: pass steps via argument rather than via opal_dev
The steps argument is only read by the next function, so it can be passed directly as an argument rather than via opal_dev. Normally, the steps is an array on the stack, so the pointer stops being valid then the function that set opal_dev.steps returns. If opal_dev.steps was not set to NULL before return it would become a dangling pointer. When the steps are passed as argument this becomes easier to see and more difficult to misuse. Acked-by: Jon Derrick <jonathan.derrick@intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Scott Bauer <sbauer@plzdonthack.me> Signed-off-by: David Kozub <zub@linux.fjfi.cvut.cz> Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
David Kozub
Jens Axboe
parent
372be40844
commit
3db87236cf
156
block/sed-opal.c
156
block/sed-opal.c
@ -85,7 +85,6 @@ struct opal_dev {
|
||||
void *data;
|
||||
sec_send_recv *send_recv;
|
||||
|
||||
const struct opal_step *steps;
|
||||
struct mutex dev_lock;
|
||||
u16 comid;
|
||||
u32 hsn;
|
||||
@ -382,37 +381,34 @@ static void check_geometry(struct opal_dev *dev, const void *data)
|
||||
dev->lowest_lba = geo->lowest_aligned_lba;
|
||||
}
|
||||
|
||||
static int next(struct opal_dev *dev)
|
||||
static int next(struct opal_dev *dev, const struct opal_step *steps,
|
||||
size_t n_steps)
|
||||
{
|
||||
const struct opal_step *step;
|
||||
int state = 0, error = 0;
|
||||
size_t state;
|
||||
int error = 0;
|
||||
|
||||
do {
|
||||
step = &dev->steps[state];
|
||||
if (!step->fn)
|
||||
break;
|
||||
for (state = 0; state < n_steps; state++) {
|
||||
step = &steps[state];
|
||||
|
||||
error = step->fn(dev, step->data);
|
||||
if (error) {
|
||||
pr_debug("Step %d (%pS) failed with error %d: %s\n",
|
||||
state, step->fn, error,
|
||||
opal_error_to_human(error));
|
||||
if (error)
|
||||
goto out_error;
|
||||
}
|
||||
|
||||
/* For each OPAL command we do a discovery0 then we
|
||||
* start some sort of session.
|
||||
* If we haven't passed state 1 then there was an error
|
||||
* on discovery0 or during the attempt to start a
|
||||
* session. Therefore we shouldn't attempt to terminate
|
||||
* a session, as one has not yet been created.
|
||||
*/
|
||||
if (state > 1) {
|
||||
end_opal_session_error(dev);
|
||||
return error;
|
||||
}
|
||||
return 0;
|
||||
|
||||
}
|
||||
state++;
|
||||
} while (!error);
|
||||
out_error:
|
||||
/*
|
||||
* For each OPAL command the first step in steps does a discovery0
|
||||
* and the second step starts some sort of session. If an error occurred
|
||||
* in the first two steps (and thus stopping the loop with state <= 1)
|
||||
* then there was an error before or during the attempt to start a
|
||||
* session. Therefore we shouldn't attempt to terminate a session, as
|
||||
* one has not yet been created.
|
||||
*/
|
||||
if (state > 1)
|
||||
end_opal_session_error(dev);
|
||||
|
||||
return error;
|
||||
}
|
||||
@ -1836,17 +1832,13 @@ static int end_opal_session(struct opal_dev *dev, void *data)
|
||||
static int end_opal_session_error(struct opal_dev *dev)
|
||||
{
|
||||
const struct opal_step error_end_session[] = {
|
||||
{ end_opal_session, },
|
||||
{ NULL, }
|
||||
{ end_opal_session, }
|
||||
};
|
||||
dev->steps = error_end_session;
|
||||
return next(dev);
|
||||
return next(dev, error_end_session, ARRAY_SIZE(error_end_session));
|
||||
}
|
||||
|
||||
static inline void setup_opal_dev(struct opal_dev *dev,
|
||||
const struct opal_step *steps)
|
||||
static inline void setup_opal_dev(struct opal_dev *dev)
|
||||
{
|
||||
dev->steps = steps;
|
||||
dev->tsn = 0;
|
||||
dev->hsn = 0;
|
||||
dev->prev_data = NULL;
|
||||
@ -1855,14 +1847,13 @@ static inline void setup_opal_dev(struct opal_dev *dev,
|
||||
static int check_opal_support(struct opal_dev *dev)
|
||||
{
|
||||
const struct opal_step steps[] = {
|
||||
{ opal_discovery0, },
|
||||
{ NULL, }
|
||||
{ opal_discovery0, }
|
||||
};
|
||||
int ret;
|
||||
|
||||
mutex_lock(&dev->dev_lock);
|
||||
setup_opal_dev(dev, steps);
|
||||
ret = next(dev);
|
||||
setup_opal_dev(dev);
|
||||
ret = next(dev, steps, ARRAY_SIZE(steps));
|
||||
dev->supported = !ret;
|
||||
mutex_unlock(&dev->dev_lock);
|
||||
return ret;
|
||||
@ -1919,14 +1910,13 @@ static int opal_secure_erase_locking_range(struct opal_dev *dev,
|
||||
{ start_auth_opal_session, opal_session },
|
||||
{ get_active_key, &opal_session->opal_key.lr },
|
||||
{ gen_key, },
|
||||
{ end_opal_session, },
|
||||
{ NULL, }
|
||||
{ end_opal_session, }
|
||||
};
|
||||
int ret;
|
||||
|
||||
mutex_lock(&dev->dev_lock);
|
||||
setup_opal_dev(dev, erase_steps);
|
||||
ret = next(dev);
|
||||
setup_opal_dev(dev);
|
||||
ret = next(dev, erase_steps, ARRAY_SIZE(erase_steps));
|
||||
mutex_unlock(&dev->dev_lock);
|
||||
return ret;
|
||||
}
|
||||
@ -1938,14 +1928,13 @@ static int opal_erase_locking_range(struct opal_dev *dev,
|
||||
{ opal_discovery0, },
|
||||
{ start_auth_opal_session, opal_session },
|
||||
{ erase_locking_range, opal_session },
|
||||
{ end_opal_session, },
|
||||
{ NULL, }
|
||||
{ end_opal_session, }
|
||||
};
|
||||
int ret;
|
||||
|
||||
mutex_lock(&dev->dev_lock);
|
||||
setup_opal_dev(dev, erase_steps);
|
||||
ret = next(dev);
|
||||
setup_opal_dev(dev);
|
||||
ret = next(dev, erase_steps, ARRAY_SIZE(erase_steps));
|
||||
mutex_unlock(&dev->dev_lock);
|
||||
return ret;
|
||||
}
|
||||
@ -1963,8 +1952,7 @@ static int opal_enable_disable_shadow_mbr(struct opal_dev *dev,
|
||||
{ end_opal_session, },
|
||||
{ start_admin1LSP_opal_session, &opal_mbr->key },
|
||||
{ set_mbr_enable_disable, &enable_disable },
|
||||
{ end_opal_session, },
|
||||
{ NULL, }
|
||||
{ end_opal_session, }
|
||||
};
|
||||
int ret;
|
||||
|
||||
@ -1973,8 +1961,8 @@ static int opal_enable_disable_shadow_mbr(struct opal_dev *dev,
|
||||
return -EINVAL;
|
||||
|
||||
mutex_lock(&dev->dev_lock);
|
||||
setup_opal_dev(dev, mbr_steps);
|
||||
ret = next(dev);
|
||||
setup_opal_dev(dev);
|
||||
ret = next(dev, mbr_steps, ARRAY_SIZE(mbr_steps));
|
||||
mutex_unlock(&dev->dev_lock);
|
||||
return ret;
|
||||
}
|
||||
@ -1991,7 +1979,7 @@ static int opal_save(struct opal_dev *dev, struct opal_lock_unlock *lk_unlk)
|
||||
suspend->lr = lk_unlk->session.opal_key.lr;
|
||||
|
||||
mutex_lock(&dev->dev_lock);
|
||||
setup_opal_dev(dev, NULL);
|
||||
setup_opal_dev(dev);
|
||||
add_suspend_info(dev, suspend);
|
||||
mutex_unlock(&dev->dev_lock);
|
||||
return 0;
|
||||
@ -2004,8 +1992,7 @@ static int opal_add_user_to_lr(struct opal_dev *dev,
|
||||
{ opal_discovery0, },
|
||||
{ start_admin1LSP_opal_session, &lk_unlk->session.opal_key },
|
||||
{ add_user_to_lr, lk_unlk },
|
||||
{ end_opal_session, },
|
||||
{ NULL, }
|
||||
{ end_opal_session, }
|
||||
};
|
||||
int ret;
|
||||
|
||||
@ -2027,8 +2014,8 @@ static int opal_add_user_to_lr(struct opal_dev *dev,
|
||||
}
|
||||
|
||||
mutex_lock(&dev->dev_lock);
|
||||
setup_opal_dev(dev, steps);
|
||||
ret = next(dev);
|
||||
setup_opal_dev(dev);
|
||||
ret = next(dev, steps, ARRAY_SIZE(steps));
|
||||
mutex_unlock(&dev->dev_lock);
|
||||
return ret;
|
||||
}
|
||||
@ -2038,14 +2025,13 @@ static int opal_reverttper(struct opal_dev *dev, struct opal_key *opal)
|
||||
const struct opal_step revert_steps[] = {
|
||||
{ opal_discovery0, },
|
||||
{ start_SIDASP_opal_session, opal },
|
||||
{ revert_tper, }, /* controller will terminate session */
|
||||
{ NULL, }
|
||||
{ revert_tper, } /* controller will terminate session */
|
||||
};
|
||||
int ret;
|
||||
|
||||
mutex_lock(&dev->dev_lock);
|
||||
setup_opal_dev(dev, revert_steps);
|
||||
ret = next(dev);
|
||||
setup_opal_dev(dev);
|
||||
ret = next(dev, revert_steps, ARRAY_SIZE(revert_steps));
|
||||
mutex_unlock(&dev->dev_lock);
|
||||
|
||||
/*
|
||||
@ -2065,19 +2051,20 @@ static int __opal_lock_unlock(struct opal_dev *dev,
|
||||
{ opal_discovery0, },
|
||||
{ start_auth_opal_session, &lk_unlk->session },
|
||||
{ lock_unlock_locking_range, lk_unlk },
|
||||
{ end_opal_session, },
|
||||
{ NULL, }
|
||||
{ end_opal_session, }
|
||||
};
|
||||
const struct opal_step unlock_sum_steps[] = {
|
||||
{ opal_discovery0, },
|
||||
{ start_auth_opal_session, &lk_unlk->session },
|
||||
{ lock_unlock_locking_range_sum, lk_unlk },
|
||||
{ end_opal_session, },
|
||||
{ NULL, }
|
||||
{ end_opal_session, }
|
||||
};
|
||||
|
||||
dev->steps = lk_unlk->session.sum ? unlock_sum_steps : unlock_steps;
|
||||
return next(dev);
|
||||
if (lk_unlk->session.sum)
|
||||
return next(dev, unlock_sum_steps,
|
||||
ARRAY_SIZE(unlock_sum_steps));
|
||||
else
|
||||
return next(dev, unlock_steps, ARRAY_SIZE(unlock_steps));
|
||||
}
|
||||
|
||||
static int __opal_set_mbr_done(struct opal_dev *dev, struct opal_key *key)
|
||||
@ -2087,12 +2074,10 @@ static int __opal_set_mbr_done(struct opal_dev *dev, struct opal_key *key)
|
||||
{ opal_discovery0, },
|
||||
{ start_admin1LSP_opal_session, key },
|
||||
{ set_mbr_done, &mbr_done_tf },
|
||||
{ end_opal_session, },
|
||||
{ NULL, }
|
||||
{ end_opal_session, }
|
||||
};
|
||||
|
||||
dev->steps = mbrdone_step;
|
||||
return next(dev);
|
||||
return next(dev, mbrdone_step, ARRAY_SIZE(mbrdone_step));
|
||||
}
|
||||
|
||||
static int opal_lock_unlock(struct opal_dev *dev,
|
||||
@ -2119,8 +2104,7 @@ static int opal_take_ownership(struct opal_dev *dev, struct opal_key *opal)
|
||||
{ end_opal_session, },
|
||||
{ start_SIDASP_opal_session, opal },
|
||||
{ set_sid_cpin_pin, opal },
|
||||
{ end_opal_session, },
|
||||
{ NULL, }
|
||||
{ end_opal_session, }
|
||||
};
|
||||
int ret;
|
||||
|
||||
@ -2128,8 +2112,8 @@ static int opal_take_ownership(struct opal_dev *dev, struct opal_key *opal)
|
||||
return -ENODEV;
|
||||
|
||||
mutex_lock(&dev->dev_lock);
|
||||
setup_opal_dev(dev, owner_steps);
|
||||
ret = next(dev);
|
||||
setup_opal_dev(dev);
|
||||
ret = next(dev, owner_steps, ARRAY_SIZE(owner_steps));
|
||||
mutex_unlock(&dev->dev_lock);
|
||||
return ret;
|
||||
}
|
||||
@ -2142,8 +2126,7 @@ static int opal_activate_lsp(struct opal_dev *dev,
|
||||
{ start_SIDASP_opal_session, &opal_lr_act->key },
|
||||
{ get_lsp_lifecycle, },
|
||||
{ activate_lsp, opal_lr_act },
|
||||
{ end_opal_session, },
|
||||
{ NULL, }
|
||||
{ end_opal_session, }
|
||||
};
|
||||
int ret;
|
||||
|
||||
@ -2151,8 +2134,8 @@ static int opal_activate_lsp(struct opal_dev *dev,
|
||||
return -EINVAL;
|
||||
|
||||
mutex_lock(&dev->dev_lock);
|
||||
setup_opal_dev(dev, active_steps);
|
||||
ret = next(dev);
|
||||
setup_opal_dev(dev);
|
||||
ret = next(dev, active_steps, ARRAY_SIZE(active_steps));
|
||||
mutex_unlock(&dev->dev_lock);
|
||||
return ret;
|
||||
}
|
||||
@ -2164,14 +2147,13 @@ static int opal_setup_locking_range(struct opal_dev *dev,
|
||||
{ opal_discovery0, },
|
||||
{ start_auth_opal_session, &opal_lrs->session },
|
||||
{ setup_locking_range, opal_lrs },
|
||||
{ end_opal_session, },
|
||||
{ NULL, }
|
||||
{ end_opal_session, }
|
||||
};
|
||||
int ret;
|
||||
|
||||
mutex_lock(&dev->dev_lock);
|
||||
setup_opal_dev(dev, lr_steps);
|
||||
ret = next(dev);
|
||||
setup_opal_dev(dev);
|
||||
ret = next(dev, lr_steps, ARRAY_SIZE(lr_steps));
|
||||
mutex_unlock(&dev->dev_lock);
|
||||
return ret;
|
||||
}
|
||||
@ -2182,8 +2164,7 @@ static int opal_set_new_pw(struct opal_dev *dev, struct opal_new_pw *opal_pw)
|
||||
{ opal_discovery0, },
|
||||
{ start_auth_opal_session, &opal_pw->session },
|
||||
{ set_new_pw, &opal_pw->new_user_pw },
|
||||
{ end_opal_session, },
|
||||
{ NULL }
|
||||
{ end_opal_session, }
|
||||
};
|
||||
int ret;
|
||||
|
||||
@ -2194,8 +2175,8 @@ static int opal_set_new_pw(struct opal_dev *dev, struct opal_new_pw *opal_pw)
|
||||
return -EINVAL;
|
||||
|
||||
mutex_lock(&dev->dev_lock);
|
||||
setup_opal_dev(dev, pw_steps);
|
||||
ret = next(dev);
|
||||
setup_opal_dev(dev);
|
||||
ret = next(dev, pw_steps, ARRAY_SIZE(pw_steps));
|
||||
mutex_unlock(&dev->dev_lock);
|
||||
return ret;
|
||||
}
|
||||
@ -2207,8 +2188,7 @@ static int opal_activate_user(struct opal_dev *dev,
|
||||
{ opal_discovery0, },
|
||||
{ start_admin1LSP_opal_session, &opal_session->opal_key },
|
||||
{ internal_activate_user, opal_session },
|
||||
{ end_opal_session, },
|
||||
{ NULL, }
|
||||
{ end_opal_session, }
|
||||
};
|
||||
int ret;
|
||||
|
||||
@ -2220,8 +2200,8 @@ static int opal_activate_user(struct opal_dev *dev,
|
||||
}
|
||||
|
||||
mutex_lock(&dev->dev_lock);
|
||||
setup_opal_dev(dev, act_steps);
|
||||
ret = next(dev);
|
||||
setup_opal_dev(dev);
|
||||
ret = next(dev, act_steps, ARRAY_SIZE(act_steps));
|
||||
mutex_unlock(&dev->dev_lock);
|
||||
return ret;
|
||||
}
|
||||
@ -2238,7 +2218,7 @@ bool opal_unlock_from_suspend(struct opal_dev *dev)
|
||||
return false;
|
||||
|
||||
mutex_lock(&dev->dev_lock);
|
||||
setup_opal_dev(dev, NULL);
|
||||
setup_opal_dev(dev);
|
||||
|
||||
list_for_each_entry(suspend, &dev->unlk_lst, node) {
|
||||
dev->tsn = 0;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user