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OpenCloudOS-Kernel
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dm ioctl: make __dev_status void 

__dev_status() cannot fail so make it void and simplify callers.

Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Alasdair G Kergon 2010-08-12 04:13:52 +01:00
parent 6be5449401
commit 094ea9a071
1 changed files with 31 additions and 36 deletions
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67
drivers/md/dm-ioctl.c
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@ -573,7 +573,7 @@ static struct dm_table *dm_get_live_or_inactive_table(struct mapped_device *md,
* Fills in a dm_ioctl structure, ready for sending back to
* userland.
*/
static int __dev_status(struct mapped_device *md, struct dm_ioctl *param)
static void __dev_status(struct mapped_device *md, struct dm_ioctl *param)
{
struct gendisk *disk = dm_disk(md);
struct dm_table *table;
@ -617,8 +617,6 @@ static int __dev_status(struct mapped_device *md, struct dm_ioctl *param)
dm_table_put(table);
}
}
return 0;
}
static int dev_create(struct dm_ioctl *param, size_t param_size)
@ -638,14 +636,14 @@ static int dev_create(struct dm_ioctl *param, size_t param_size)
return r;
r = dm_hash_insert(param->name, *param->uuid ? param->uuid : NULL, md);
if (r) {
dm_put(md);
return r;
}
if (r)
goto out;
param->flags &= ~DM_INACTIVE_PRESENT_FLAG;
r = __dev_status(md, param);
__dev_status(md, param);
out:
dm_put(md);
return r;
@ -841,13 +839,17 @@ static int do_suspend(struct dm_ioctl *param)
if (param->flags & DM_NOFLUSH_FLAG)
suspend_flags |= DM_SUSPEND_NOFLUSH_FLAG;
if (!dm_suspended_md(md))
if (!dm_suspended_md(md)) {
r = dm_suspend(md, suspend_flags);
if (r)
goto out;
}
if (!r)
r = __dev_status(md, param);
__dev_status(md, param);
out:
dm_put(md);
return r;
}
@ -909,7 +911,7 @@ static int do_resume(struct dm_ioctl *param)
dm_table_destroy(old_map);
if (!r)
r = __dev_status(md, param);
__dev_status(md, param);
dm_put(md);
return r;
@ -933,16 +935,16 @@ static int dev_suspend(struct dm_ioctl *param, size_t param_size)
*/
static int dev_status(struct dm_ioctl *param, size_t param_size)
{
int r;
struct mapped_device *md;
md = find_device(param);
if (!md)
return -ENXIO;
r = __dev_status(md, param);
__dev_status(md, param);
dm_put(md);
return r;
return 0;
}
/*
@ -1017,7 +1019,7 @@ static void retrieve_status(struct dm_table *table,
*/
static int dev_wait(struct dm_ioctl *param, size_t param_size)
{
int r;
int r = 0;
struct mapped_device *md;
struct dm_table *table;
@ -1038,9 +1040,7 @@ static int dev_wait(struct dm_ioctl *param, size_t param_size)
* changed to trigger the event, so we may as well tell
* him and save an ioctl.
*/
r = __dev_status(md, param);
if (r)
goto out;
__dev_status(md, param);
table = dm_get_live_or_inactive_table(md, param);
if (table) {
@ -1048,8 +1048,9 @@ static int dev_wait(struct dm_ioctl *param, size_t param_size)
dm_table_put(table);
}
out:
out:
dm_put(md);
return r;
}
@ -1184,7 +1185,7 @@ static int table_load(struct dm_ioctl *param, size_t param_size)
up_write(&_hash_lock);
param->flags |= DM_INACTIVE_PRESENT_FLAG;
r = __dev_status(md, param);
__dev_status(md, param);
out:
dm_put(md);
@ -1194,7 +1195,6 @@ out:
static int table_clear(struct dm_ioctl *param, size_t param_size)
{
int r;
struct hash_cell *hc;
struct mapped_device *md;
@ -1214,11 +1214,12 @@ static int table_clear(struct dm_ioctl *param, size_t param_size)
param->flags &= ~DM_INACTIVE_PRESENT_FLAG;
r = __dev_status(hc->md, param);
__dev_status(hc->md, param);
md = hc->md;
up_write(&_hash_lock);
dm_put(md);
return r;
return 0;
}
/*
@ -1263,7 +1264,6 @@ static void retrieve_deps(struct dm_table *table,
static int table_deps(struct dm_ioctl *param, size_t param_size)
{
int r = 0;
struct mapped_device *md;
struct dm_table *table;
@ -1271,9 +1271,7 @@ static int table_deps(struct dm_ioctl *param, size_t param_size)
if (!md)
return -ENXIO;
r = __dev_status(md, param);
if (r)
goto out;
__dev_status(md, param);
table = dm_get_live_or_inactive_table(md, param);
if (table) {
@ -1281,9 +1279,9 @@ static int table_deps(struct dm_ioctl *param, size_t param_size)
dm_table_put(table);
}
out:
dm_put(md);
return r;
return 0;
}
/*
@ -1292,7 +1290,6 @@ static int table_deps(struct dm_ioctl *param, size_t param_size)
*/
static int table_status(struct dm_ioctl *param, size_t param_size)
{
int r;
struct mapped_device *md;
struct dm_table *table;
@ -1300,9 +1297,7 @@ static int table_status(struct dm_ioctl *param, size_t param_size)
if (!md)
return -ENXIO;
r = __dev_status(md, param);
if (r)
goto out;
__dev_status(md, param);
table = dm_get_live_or_inactive_table(md, param);
if (table) {
@ -1310,9 +1305,9 @@ static int table_status(struct dm_ioctl *param, size_t param_size)
dm_table_put(table);
}
out:
dm_put(md);
return r;
return 0;
}
/*