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path: root/fsdev/qemu-fsdev-opts.c
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2019-10-109p: Added virtfs option 'multidevs=remap|forbid|warn'Antonios Motakis1-1/+6
'warn' (default): Only log an error message (once) on host if more than one device is shared by same export, except of that just ignore this config error though. This is the default behaviour for not breaking existing installations implying that they really know what they are doing. 'forbid': Like 'warn', but except of just logging an error this also denies access of guest to additional devices. 'remap': Allows to share more than one device per export by remapping inodes from host to guest appropriately. To support multiple devices on the 9p share, and avoid qid path collisions we take the device id as input to generate a unique QID path. The lowest 48 bits of the path will be set equal to the file inode, and the top bits will be uniquely assigned based on the top 16 bits of the inode and the device id. Signed-off-by: Antonios Motakis <antonios.motakis@huawei.com> [CS: - Rebased to https://github.com/gkurz/qemu/commits/9p-next (SHA1 7fc4c49e91). - Added virtfs option 'multidevs', original patch simply did the inode remapping without being asked. - Updated hash calls to new xxhash API. - Updated docs for new option 'multidevs'. - Fixed v9fs_do_readdir() not having remapped inodes. - Log error message when running out of prefixes in qid_path_prefixmap(). - Fixed definition of QPATH_INO_MASK. - Wrapped qpp_table initialization to dedicated qpp_table_init() function. - Dropped unnecessary parantheses in qpp_lookup_func(). - Dropped unnecessary g_malloc0() result checks. ] Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com> [groug: - Moved "multidevs" parsing to the local backend. - Added hint to invalid multidevs option error. - Turn "remap" into "x-remap". ] Signed-off-by: Greg Kurz <groug@kaod.org>
2017-06-299pfs: local: Add support for custom fmode/dmode in 9ps mapped security modesTobias Schramm1-0/+12
In mapped security modes, files are created with very restrictive permissions (600 for files and 700 for directories). This makes file sharing between virtual machines and users on the host rather complicated. Imagine eg. a group of users that need to access data produced by processes on a virtual machine. Giving those users access to the data will be difficult since the group access mode is always 0. This patch makes the default mode for both files and directories configurable. Existing setups that don't know about the new parameters keep using the current secure behavior. Signed-off-by: Tobias Schramm <tobleminer@gmail.com> Signed-off-by: Greg Kurz <groug@kaod.org>
2017-02-28throttle: factor out duplicate codePradeep Jagadeesh1-76/+4
This patch removes the redundant throttle code that was present in block and fsdev device files. Now the common code is moved to a single file. Signed-off-by: Pradeep Jagadeesh <pradeep.jagadeesh@huawei.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> (fix indent nit, Greg Kurz) Signed-off-by: Greg Kurz <groug@kaod.org>
2017-02-28fsdev: add IO throttle support to fsdev devicesPradeep Jagadeesh1-1/+76
This patchset adds the throttle support for the 9p-local driver. For now this functionality can be enabled only through qemu cli options. QMP interface and support to other drivers need further extensions. To make it simple for other 9p drivers, the throttle code has been put in separate files. Signed-off-by: Pradeep Jagadeesh <pradeep.jagadeesh@huawei.com> Reviewed-by: Alberto Garcia <berto@igalia.com> (pass extra NULL CoMutex * argument to qemu_co_queue_wait(), added options to qemu-options.hx, Greg Kurz) Signed-off-by: Greg Kurz <groug@kaod.org>
2016-06-069p/fsdev: remove obsolete references to virtioGreg Kurz1-1/+1
Most of the 9p code is now virtio agnostic. This patch does a final cleanup: - drop references to Virtio from the header comments - fix includes Also drop a couple of leading empty lines while here. Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
2016-03-16module: Rename machine_init() to opts_init()Eduardo Habkost1-1/+1
The only remaining users of machine_init() only call qemu_add_opts(). Rename machine_init() to opts_init() and move it closer to the qemu_add_opts() calls on vl.c. Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Igor Mammedov <imammedo@redhat.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Marcel Apfelbaum <marcel@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2016-01-299pfs: Clean up includesPeter Maydell1-0/+1
Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1453832250-766-18-git-send-email-peter.maydell@linaro.org
2013-01-12qemu-option: move standard option definitions out of qemu-config.cPaolo Bonzini1-0/+85
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>