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* 9pfs: add new function v9fs_co_readdir_many()Christian Schoenebeck2020-08-121-0/+171
| | | | | | | | | | | | | | | | | | | | The newly added function v9fs_co_readdir_many() retrieves multiple directory entries with a single fs driver request. It is intended to replace uses of v9fs_co_readdir(), the latter only retrieves a single directory entry per fs driver request instead. The reason for this planned replacement is that for every fs driver request the coroutine is dispatched from main I/O thread to a background I/O thread and eventually dispatched back to main I/O thread. Hopping between threads adds latency. So if a 9pfs Treaddir request reads a large amount of directory entries, this currently sums up to huge latencies of several hundred ms or even more. So using v9fs_co_readdir_many() instead of v9fs_co_readdir() will provide significant performance improvements. Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com> Message-Id: <73dc827a12ef577ae7e644dcf34a5c0e443ab42f.1596012787.git.qemu_oss@crudebyte.com> Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
* 9pfs: split out fs driver core of v9fs_co_readdir()Christian Schoenebeck2020-08-121-14/+24
| | | | | | | | | | | | | | | | | The implementation of v9fs_co_readdir() has two parts: the outer part is executed by main I/O thread, whereas the inner part is executed by fs driver on a background I/O thread. Move the inner part to its own new, private function do_readdir(), so it can be shared by another upcoming new function. This is just a preparatory patch for the subsequent patch, with the purpose to avoid the next patch to clutter the overall diff. Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com> Reviewed-by: Greg Kurz <groug@kaod.org> Message-Id: <a426ee06e77584fa2d8253ce5d8bea519eb3ffd4.1596012787.git.qemu_oss@crudebyte.com> Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
* Include qemu/main-loop.h lessMarkus Armbruster2019-08-161-0/+1
| | | | | | | | | | | | | | | | | | | | In my "build everything" tree, changing qemu/main-loop.h triggers a recompile of some 5600 out of 6600 objects (not counting tests and objects that don't depend on qemu/osdep.h). It includes block/aio.h, which in turn includes qemu/event_notifier.h, qemu/notify.h, qemu/processor.h, qemu/qsp.h, qemu/queue.h, qemu/thread-posix.h, qemu/thread.h, qemu/timer.h, and a few more. Include qemu/main-loop.h only where it's needed. Touching it now recompiles only some 1700 objects. For block/aio.h and qemu/event_notifier.h, these numbers drop from 5600 to 2800. For the others, they shrink only slightly. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190812052359.30071-21-armbru@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* 9pfs: use coroutine_fn annotation in hw/9pfs/co*.[ch]Greg Kurz2016-10-171-7/+10
| | | | | | | | | All these functions use the v9fs_co_run_in_worker() macro, and thus always call qemu_coroutine_self() and qemu_coroutine_yield(). Let's mark them to make it obvious they execute in coroutine context. Signed-off-by: Greg Kurz <groug@kaod.org>
* 9p: switch back to readdir()Greg Kurz2016-06-061-4/+6
| | | | | | | | | | This patch changes the 9p code to use readdir() again instead of readdir_r(), which is deprecated in glibc 2.24. All the locking was put in place by a previous patch. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
* 9p/fsdev: remove obsolete references to virtioGreg Kurz2016-06-061-2/+1Star
| | | | | | | | | | 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>
* 9pfs: Clean up includesPeter Maydell2016-01-291-0/+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
* 9pfs: rename virtio-9p-coth.{c,h} to coth.{c,h}Wei Liu2016-01-081-1/+1
| | | | | | | | | | | Those two files are not virtio specific. Rename them to use generic names. Fix includes in various C files. Change define guards and comments in header files. Signed-off-by: Wei Liu <wei.liu2@citrix.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
* coroutine: move into libqemuutil.a libraryDaniel P. Berrange2015-10-201-1/+1
| | | | | | | | | | | | | | | | | The coroutine files are currently referenced by the block-obj-y variable. The coroutine functionality though is already used by more than just the block code. eg migration code uses coroutine yield. In the future the I/O channel code will also use the coroutine yield functionality. Since the coroutine code is nicely self-contained it can be easily built as part of the libqemuutil.a library, making it widely available. The headers are also moved into include/qemu, instead of the include/block directory, since they are now part of the util codebase, and the impl was never in the block/ directory either. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
* misc: move include files to include/qemu/Paolo Bonzini2012-12-191-1/+1
| | | | Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* block: move include files to include/block/Paolo Bonzini2012-12-191-1/+1
| | | | Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* fix typo: delete redundant semicolonDong Xu Wang2011-12-061-3/+3
| | | | | | | Double semicolons should be single. Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
* hw/9pfs: Abstract open state of fid to V9fsFidOpenStateAneesh Kumar K.V2011-10-311-8/+8
| | | | | | | | To implement synthetic file system in Qemu we may not really require file descriptor and Dir *. Make generic code use V9fsFidOpenState instead. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
* hw/9pfs: Implement TFLUSH operationAneesh Kumar K.V2011-09-221-8/+36
| | | | Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
* hw/9pfs: Add fs driver specific details to fscontextAneesh Kumar K.V2011-09-221-4/+4
| | | | | | | | Add a new context flag PATHNAME_FSCONTEXT and indicate whether the fs driver track fid using path names. Also add a private pointer that help us to track fs driver specific values in there Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
* hw/9pfs: Move fid pathname tracking to seperate data type.Aneesh Kumar K.V2011-09-221-9/+11
| | | | | | | This enables us to add handles to track fids later. The V9fsPath added is similar to V9fsString except that the size include the NULL byte also. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
* hw/9pfs: Use read-write lock for protecting fid path.Aneesh Kumar K.V2011-09-221-2/+16
| | | | | | | On rename we take the write lock and this ensure path doesn't change as we operate on them. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
* hw/9pfs: Add directory reclaim supportAneesh Kumar K.V2011-08-251-0/+9
| | | | Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
* hw/9pfs: Add file descriptor reclaim supportAneesh Kumar K.V2011-08-251-3/+1Star
| | | | | | [M. Mohan Kumar <mohan@in.ibm.com> removed some unused variables] Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
* use readdir_r instead of readdir for reentrancyHarsh Prateek Bora2011-08-221-4/+4
| | | | | Signed-off-by: Harsh Prateek Bora <harsh@linux.vnet.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
* hw/9pfs: Add yeild support for clunk related coroutineAneesh Kumar K.V2011-08-221-0/+16
| | | | | | This include lsetxattr, lremovexattr, closedir and close. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
* hw/9pfs: Add yield support for open and opendir coroutineAneesh Kumar K.V2011-08-221-0/+16
| | | | Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
* hw/9pfs: Add yield support for mkdir coroutineVenkateswararao Jujjuri2011-08-081-0/+19
| | | | | Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
* hw/9pfs: Add yield support for readdir related coroutinesAneesh Kumar K.V2011-08-081-0/+66
This include readdir, telldir, seekdir, rewinddir. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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