Take a look at this, it is a hack but builds a tgtlib containing most of tgtd except tgtd.c (so the modules can link back to things in tgtd) and builds the 4 main backends as shared objects. Once tgtd starts up (you have to add /usr/lib/tgt to ldconfig so that the linker/loader can find libtgt.so) it will scan /usr/lib/tgt/backing-stores and dlopen and invoke all bs_*.so it finds there. This should allow just dropping different backends indepentently of the main tgtd On Tue, Aug 6, 2013 at 10:54 AM, ronnie sahlberg <ronniesahlberg@xxxxxxxxx> wrote: > Or maybe better is just have it try to dlopen every file it finds in > /usr/lib/tgtd/backing-store/ automatically on startup. > > Since the bs_*.c files use a lot of other symbols from usr/*.c we > probably need to turn most of tgtd into a shared library so that the > bs_*.so modules can be dlopened and link to the symbol,s they need. > One way of doing this is to change the build so that tgtd.c is the > main program and everything else becomes a /usr/lib/tgt/libtgt.so > > > > On Tue, Aug 6, 2013 at 10:45 AM, Andy Grover <agrover@xxxxxxxxxx> wrote: >> On 08/05/2013 02:19 PM, ronnie sahlberg wrote: >>> >>> I think this would be very useful and good thing to have. >>> >>> I am willing to help work on doing this for the backing-stores (5 in >>> Alexanders initial mail) >>> >>> Only thing I think should be added to Alexanders proposal for (5) >>> would be something like this : >>> * BS modules are stored in /usr/lib/tgtd/backing-store/ >>> * BS modules to load can also be specified on the tgtd command-line : >>> tgtd ... --bs-modules=bs_rdwr.so >> >> >> Could this be implicit? If the --bstype is not already loaded, go try and >> load bs_foo.so? >> >> Regards -- Andy
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