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  • Anton Anton anjo
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  1. Jan 12, 2021
  3. Dec 13, 2020
  5. Sep 17, 2020
  7. Sep 15, 2020
    • Christian Schoenebeck's avatar
      9pfs: disable msize warning for synth driver · c418f935
      Christian Schoenebeck authored 
      
Previous patch introduced a performance warning being logged on host
side if client connected with an 'msize' <= 8192. Disable this
performance warning for the synth driver to prevent that warning from
being printed whenever the 9pfs (qtest) test cases are running.

Introduce a new export flag V9FS_NO_PERF_WARN for that purpose, which
might also be used to disable such warnings from the CLI in future.

We could have also prevented the warning by simply raising P9_MAX_SIZE
in virtio-9p-test.c to any value larger than 8192, however in the
context of test cases it makes sense running for edge cases, which
includes the lowest 'msize' value supported by the server which is
4096, hence we want to preserve an msize of 4096 for the test client.

Signed-off-by: default avatarChristian Schoenebeck <qemu_oss@crudebyte.com>
Reviewed-by: default avatarGreg Kurz <groug@kaod.org>
Message-Id: <E1kEyDy-0006nN-5A@lizzy.crudebyte.com>
Signed-off-by: default avatarChristian Schoenebeck <qemu_oss@crudebyte.com>
      c418f935
  9. Aug 21, 2020
  11. Jul 10, 2020
  13. Mar 09, 2020
  15. Feb 03, 2020
    • Peter Maydell's avatar
      virtfs-proxy-helper: Convert documentation to rST · 78813586
      Peter Maydell authored 
      
The virtfs-proxy-helper documentation is currently in
fsdev/qemu-trace-stap.texi in Texinfo format, which we
present to the user as:
 * a virtfs-proxy-helper manpage
 * but not (unusually for QEMU) part of the HTML docs

Convert the documentation to rST format that lives in
the docs/ subdirectory, and present it to the user as:
 * a virtfs-proxy-helper manpage
 * part of the interop/ Sphinx manual

There are minor formatting changes to suit Sphinx, but no
content changes. In particular I've split the -u and -g
options into each having their own description text.

Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
Acked-by: default avatarGreg Kurz <groug@kaod.org>
Message-id: 20200124162606.8787-9-peter.maydell@linaro.org
      78813586
  17. Jan 20, 2020
  19. Dec 02, 2019
  21. Oct 10, 2019
    • Antonios Motakis's avatar
      9p: Added virtfs option 'multidevs=remap|forbid|warn' · 1a6ed33c
      Antonios Motakis authored 
      
'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: default avatarAntonios 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: default avatarChristian 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: default avatarGreg Kurz <groug@kaod.org>
      1a6ed33c
    • Greg Kurz's avatar
      fsdev: Add return value to fsdev_throttle_parse_opts() · ea52cdd4
      Greg Kurz authored 
      
It is more convenient to use the return value of the function to notify
errors, rather than to be tied up setting up the &local_err boilerplate.

Signed-off-by: default avatarGreg Kurz <groug@kaod.org>
      ea52cdd4
    • Antonios Motakis's avatar
      9p: unsigned type for type, version, path · 87032833
      Antonios Motakis authored 
      
There is no need for signedness on these QID fields for 9p.

Signed-off-by: default avatarAntonios Motakis <antonios.motakis@huawei.com>
[CS: - Also make QID type unsigned.
     - Adjust donttouch_stat() to new types.
     - Adjust trace-events to new types. ]
Signed-off-by: default avatarChristian Schoenebeck <qemu_oss@crudebyte.com>
Signed-off-by: default avatarGreg Kurz <groug@kaod.org>
      87032833
  23. Aug 20, 2019
  25. Aug 16, 2019
  27. Jun 12, 2019
  29. May 17, 2019
  31. May 13, 2019
  33. Jan 11, 2019
    • Paolo Bonzini's avatar
      qemu/queue.h: leave head structs anonymous unless necessary · b58deb34
      Paolo Bonzini authored 
      
Most list head structs need not be given a name.  In most cases the
name is given just in case one is going to use QTAILQ_LAST, QTAILQ_PREV
or reverse iteration, but this does not apply to lists of other kinds,
and even for QTAILQ in practice this is only rarely needed.  In addition,
we will soon reimplement those macros completely so that they do not
need a name for the head struct.  So clean up everything, not giving a
name except in the rare case where it is necessary.

Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      b58deb34
  35. Dec 12, 2018
  37. Oct 19, 2018
  39. Aug 22, 2018
  41. Mar 06, 2018
  43. Feb 09, 2018
  45. Feb 08, 2018
    • Paolo Bonzini's avatar
      coroutine-lock: make qemu_co_enter_next thread-safe · 5261dd7b
      Paolo Bonzini authored 
      
qemu_co_queue_next does not need to release and re-acquire the mutex,
because the queued coroutine does not run immediately.  However, this
does not hold for qemu_co_enter_next.  Now that qemu_co_queue_wait
can synchronize (via QemuLockable) with code that is not running in
coroutine context, it's important that code using qemu_co_enter_next
can easily use a standardized locking idiom.

First of all, qemu_co_enter_next must use aio_co_wake to restart the
coroutine.  Second, the function gains a second argument, a QemuLockable*,
and the comments of qemu_co_queue_next and qemu_co_queue_restart_all
are adjusted to clarify the difference.

Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Message-Id: <20180203153935.8056-5-pbonzini@redhat.com>
Reviewed-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: default avatarFam Zheng <famz@redhat.com>
Signed-off-by: default avatarFam Zheng <famz@redhat.com>
      5261dd7b
  47. Jan 08, 2018
  49. Sep 05, 2017
  51. Aug 30, 2017
  53. Jul 18, 2017
  55. Jun 29, 2017
    • Tobias Schramm's avatar
      9pfs: local: Add support for custom fmode/dmode in 9ps mapped security modes · b96feb2c
      Tobias Schramm authored 
      
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: default avatarTobias Schramm <tobleminer@gmail.com>
Signed-off-by: default avatarGreg Kurz <groug@kaod.org>
      b96feb2c
  57. May 25, 2017