On Wed, Jul 02, 2008 at 03:21:10PM +1000, Simon Burge wrote: > Hi folks, > > I want to get a quick idea if I'm heading off down the right path for > an idea... > > For journaling, I want to be able to pass info on the location of the > journal via the mount command. The idea I'm playing with is to stick > this info into a prop_dictionary. > > As to how to actually pass this dictionary in, I had the following idea. > We currently have mount(2) prototyped as: > > int > mount(const char *type, const char *dir, int flags, void *data, > size_t data_len); > > Rather than adding extra arguments to this for the prop_dictionary, I > was thinking about overloading the existing data/data_len. Currently > this is for filesystem-specific arguments. I was thinking of adding a > new flag called "MNT_PROP" which means the last two arguments are to be > interpreted as a prop_dictionary and its size instead of the traditional > mount args structure. > > > Another option altogether is to add a new system call entirely. Antti > pointed out the FreeBSD nmount() system call, which is declared as: > > int > nmount(struct iovec *iov, u_int niov, int flags); > > but rather than use iovecs I think we'd use a prop_dictionary instead. > As to a name for this new system call - any suggestions? :-) Add a new system call or version mount(). pmount? Take care, Bill
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