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| author | Peter Rajnoha <prajnoha@redhat.com> | 2010-03-06 02:32:31 +0000 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2010-03-06 02:32:31 +0000 |
| commit | 3abf85b5b5851b5f28d3d8a920ebb844edd08352 (patch) | |
| tree | b59e5c9322cc116b0ce5dc183d3b8286080c6031 /drivers/md/dm-ioctl.c | |
| parent | a97f925a32aad2a37971d7bfb657006acf04e42d (diff) | |
| download | linux-3abf85b5b5851b5f28d3d8a920ebb844edd08352.tar.gz | |
dm ioctl: introduce flag indicating uevent was generated
Set a new DM_UEVENT_GENERATED_FLAG when returning from ioctls to indicate that a uevent was actually generated. This tells the userspace caller that it may need to wait for the event to be processed. Signed-off-by: Peter Rajnoha <prajnoha@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-ioctl.c')
| -rw-r--r-- | drivers/md/dm-ioctl.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c index e3cf5686d0aa..d7500e1c26f2 100644 --- a/drivers/md/dm-ioctl.c +++ b/drivers/md/dm-ioctl.c @@ -285,7 +285,8 @@ retry: up_write(&_hash_lock); } -static int dm_hash_rename(uint32_t cookie, const char *old, const char *new) +static int dm_hash_rename(uint32_t cookie, uint32_t *flags, const char *old, + const char *new) { char *new_name, *old_name; struct hash_cell *hc; @@ -344,7 +345,8 @@ static int dm_hash_rename(uint32_t cookie, const char *old, const char *new) dm_table_put(table); } - dm_kobject_uevent(hc->md, KOBJ_CHANGE, cookie); + if (!dm_kobject_uevent(hc->md, KOBJ_CHANGE, cookie)) + *flags |= DM_UEVENT_GENERATED_FLAG; dm_put(hc->md); up_write(&_hash_lock); @@ -736,10 +738,10 @@ static int dev_remove(struct dm_ioctl *param, size_t param_size) __hash_remove(hc); up_write(&_hash_lock); - dm_kobject_uevent(md, KOBJ_REMOVE, param->event_nr); + if (!dm_kobject_uevent(md, KOBJ_REMOVE, param->event_nr)) + param->flags |= DM_UEVENT_GENERATED_FLAG; dm_put(md); - param->data_size = 0; return 0; } @@ -773,7 +775,9 @@ static int dev_rename(struct dm_ioctl *param, size_t param_size) return r; param->data_size = 0; - return dm_hash_rename(param->event_nr, param->name, new_name); + + return dm_hash_rename(param->event_nr, ¶m->flags, param->name, + new_name); } static int dev_set_geometry(struct dm_ioctl *param, size_t param_size) @@ -899,8 +903,8 @@ static int do_resume(struct dm_ioctl *param) if (dm_suspended_md(md)) { r = dm_resume(md); - if (!r) - dm_kobject_uevent(md, KOBJ_CHANGE, param->event_nr); + if (!r && !dm_kobject_uevent(md, KOBJ_CHANGE, param->event_nr)) + param->flags |= DM_UEVENT_GENERATED_FLAG; } if (old_map) @@ -1477,6 +1481,7 @@ static int validate_params(uint cmd, struct dm_ioctl *param) { /* Always clear this flag */ param->flags &= ~DM_BUFFER_FULL_FLAG; + param->flags &= ~DM_UEVENT_GENERATED_FLAG; /* Ignores parameters */ if (cmd == DM_REMOVE_ALL_CMD || |