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Introduction ------------- Linux target framework (tgt) aims to simplify various SCSI target driver (iSCSI, Fibre Channel, SRP, etc) creation and maintenance. Currently, tgt supports the following target drivers: - iSCSI software target driver for Ethernet NICs - iSER software target driver for Infiniband and RDMA NICs - IBM System p VIO server - FCoE software target driver for Ethernet NICs (in progress) - Qlogic qla2xxx FC target driver (in progress) Tgt consists of kernel modules, user-space daemon, and user-space tools. iSCSI, iSER, and FCoE target drivers use only user-space daemon and tools (i.e. they are just user-space applications. They don't need any kernel support). tgt can emulate the following device types: - SBC: a virtual disk drive that can use a file to store the content. - SMC: a virtual media jukebox that can be controlled by the "mtx" tool (partially functional). - MMC: a virtual DVD drive that can read DVD-ROM iso files and create burnable DVD+R. It can be combined with SMC to provide a fully operational DVD jukebox. - SSC: a virtual tape device (aka VTL) that can use a file to store the content (in progress). - OSD: a virtual object-based storage device that can use a file to store the content (in progress). The code is under the GNU General Public License version 2. Preparation ------------- Linux kernel 2.6.22 or newer are recommended because tgt can get better performance with signalfd. Target drivers have their own ways to build, configure, etc. Please find an appropriate documentation in the doc directory. You might find other useful information on tgt's site: http://stgt.sourceforge.net/ Developer Notes ------------- The central resource for tgt development is the mailing list (firstname.lastname@example.org). First, please read the following documents (in short, follow Linux kernel development rules): http://lxr.linux.no/source/Documentation/CodingStyle http://lxr.linux.no/source/Documentation/SubmittingPatches Then, check your patches with the patch style checker prior to submission (scripts/checkpatch.pl) like the following example. fujita@arbre:~/git/tgt$ ./scripts/checkpatch.pl ~/0001-add-bidi-support.patch Your patch has no obvious style problems and is ready for submission.