On Mon, Mar 13, 2017 at 10:40:38PM +0100, Max Reitz wrote: > This patch adds two new parameters to the preallocate() function so we > will be able to use it not just for preallocating a new image but also > for preallocated image growth. > > The offset parameter allows the caller to specify a virtual offset from > which to start preallocating. For newly created images this is always 0, > but for preallocating growth this will be the old image length. > > The new_length parameter specifies the supposed new length of the image > (basically the "end offset" for preallocation). During image truncation, > bdrv_getlength() will return the old image length so we cannot rely on > its return value then.
You documented the arguments in the commit description. Please move them into doc comments.
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