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light: prevent races on device size

This commit is contained in:
Thomas Schoebel-Theuer 2013-09-25 15:57:32 +02:00 committed by Thomas Schoebel-Theuer
parent ffc97c5c68
commit 7a2755a56f
1 changed files with 13 additions and 2 deletions
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15
kernel/sy_old/mars_light.c
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@ -443,8 +443,19 @@ int _set_if_params(struct mars_brick *_brick, void *private)
MARS_ERR("bad brick type\n"); MARS_ERR("bad brick type\n");
return -EINVAL; return -EINVAL;
} }
if (rot) if (!rot) {
if_brick->dev_size = rot->dev_size; MARS_ERR("too early\n");
return -EINVAL;
}
if (rot->dev_size <= 0) {
MARS_ERR("dev_size = %lld\n", rot->dev_size);
return -EINVAL;
}
if (if_brick->dev_size > 0 && rot->dev_size < if_brick->dev_size) {
MARS_ERR("new dev size = %lld < old dev_size = %lld\n", rot->dev_size, if_brick->dev_size);
return -EINVAL;
}
if_brick->dev_size = rot->dev_size;
if_brick->max_plugged = IF_MAX_PLUGGED; if_brick->max_plugged = IF_MAX_PLUGGED;
if_brick->readahead = IF_READAHEAD; if_brick->readahead = IF_READAHEAD;
if_brick->skip_sync = IF_SKIP_SYNC; if_brick->skip_sync = IF_SKIP_SYNC;