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virtfs: Fix documentation of -fsdev and -virtfs
This fixes several things: - add "id" description to -virtfs documentation - split the description into several lines in both usage and documentation for accurateness and clarity - add documentation and usage of the synth fsdriver - add "throttling.*" description to -fsdev local - add some missing periods - add proper reference to the virtfs-proxy-helper(1) manual page - document that the virtio device may be either virtio-9p-pci, virtio-9p-ccw or virtio-9p-device, depending on the machine type Buglink: https://bugs.launchpad.net/qemu/+bug/1581976 Signed-off-by: Greg Kurz <groug@kaod.org> Acked-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Greg Kurz
parent
6e4199af73
commit
b44a6b0970
@ -1232,26 +1232,35 @@ the write back by pressing @key{C-a s} (@pxref{disk_images}).
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ETEXI
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DEF("fsdev", HAS_ARG, QEMU_OPTION_fsdev,
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"-fsdev fsdriver,id=id[,path=path,][security_model={mapped-xattr|mapped-file|passthrough|none}]\n"
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" [,writeout=immediate][,readonly][,socket=socket|sock_fd=sock_fd][,fmode=fmode][,dmode=dmode]\n"
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"-fsdev local,id=id,path=path,security_model=mapped-xattr|mapped-file|passthrough|none\n"
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" [,writeout=immediate][,readonly][,fmode=fmode][,dmode=dmode]\n"
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" [[,throttling.bps-total=b]|[[,throttling.bps-read=r][,throttling.bps-write=w]]]\n"
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" [[,throttling.iops-total=i]|[[,throttling.iops-read=r][,throttling.iops-write=w]]]\n"
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" [[,throttling.bps-total-max=bm]|[[,throttling.bps-read-max=rm][,throttling.bps-write-max=wm]]]\n"
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" [[,throttling.iops-total-max=im]|[[,throttling.iops-read-max=irm][,throttling.iops-write-max=iwm]]]\n"
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" [[,throttling.iops-size=is]]\n",
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" [[,throttling.iops-size=is]]\n"
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"-fsdev proxy,id=id,socket=socket[,writeout=immediate][,readonly]\n"
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"-fsdev proxy,id=id,sock_fd=sock_fd[,writeout=immediate][,readonly]\n"
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"-fsdev synth,id=id\n",
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QEMU_ARCH_ALL)
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STEXI
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@item -fsdev @var{fsdriver},id=@var{id},path=@var{path},[security_model=@var{security_model}][,writeout=@var{writeout}][,readonly][,socket=@var{socket}|sock_fd=@var{sock_fd}][,fmode=@var{fmode}][,dmode=@var{dmode}]
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@item -fsdev local,id=@var{id},path=@var{path},security_model=@var{security_model} [,writeout=@var{writeout}][,readonly][,fmode=@var{fmode}][,dmode=@var{dmode}] [,throttling.@var{option}=@var{value}[,throttling.@var{option}=@var{value}[,...]]]
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@itemx -fsdev proxy,id=@var{id},socket=@var{socket}[,writeout=@var{writeout}][,readonly]
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@itemx -fsdev proxy,id=@var{id},sock_fd=@var{sock_fd}[,writeout=@var{writeout}][,readonly]
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@itemx -fsdev synth,id=@var{id}[,readonly]
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@findex -fsdev
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Define a new file system device. Valid options are:
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@table @option
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@item @var{fsdriver}
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This option specifies the fs driver backend to use.
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Currently "local" and "proxy" file system drivers are supported.
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@item local
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Accesses to the filesystem are done by QEMU.
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@item proxy
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Accesses to the filesystem are done by virtfs-proxy-helper(1).
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@item synth
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Synthetic filesystem, only used by QTests.
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@item id=@var{id}
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Specifies identifier for this device
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Specifies identifier for this device.
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@item path=@var{path}
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Specifies the export path for the file system device. Files under
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this path will be available to the 9p client on the guest.
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@ -1279,48 +1288,76 @@ Enables exporting 9p share as a readonly mount for guests. By default
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read-write access is given.
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@item socket=@var{socket}
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Enables proxy filesystem driver to use passed socket file for communicating
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with virtfs-proxy-helper
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with virtfs-proxy-helper(1).
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@item sock_fd=@var{sock_fd}
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Enables proxy filesystem driver to use passed socket descriptor for
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communicating with virtfs-proxy-helper. Usually a helper like libvirt
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will create socketpair and pass one of the fds as sock_fd
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communicating with virtfs-proxy-helper(1). Usually a helper like libvirt
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will create socketpair and pass one of the fds as sock_fd.
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@item fmode=@var{fmode}
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Specifies the default mode for newly created files on the host. Works only
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with security models "mapped-xattr" and "mapped-file".
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@item dmode=@var{dmode}
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Specifies the default mode for newly created directories on the host. Works
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only with security models "mapped-xattr" and "mapped-file".
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@item throttling.bps-total=@var{b},throttling.bps-read=@var{r},throttling.bps-write=@var{w}
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Specify bandwidth throttling limits in bytes per second, either for all request
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types or for reads or writes only.
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@item throttling.bps-total-max=@var{bm},bps-read-max=@var{rm},bps-write-max=@var{wm}
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Specify bursts in bytes per second, either for all request types or for reads
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or writes only. Bursts allow the guest I/O to spike above the limit
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temporarily.
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@item throttling.iops-total=@var{i},throttling.iops-read=@var{r}, throttling.iops-write=@var{w}
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Specify request rate limits in requests per second, either for all request
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types or for reads or writes only.
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@item throttling.iops-total-max=@var{im},throttling.iops-read-max=@var{irm}, throttling.iops-write-max=@var{iwm}
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Specify bursts in requests per second, either for all request types or for reads
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or writes only. Bursts allow the guest I/O to spike above the limit temporarily.
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@item throttling.iops-size=@var{is}
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Let every @var{is} bytes of a request count as a new request for iops
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throttling purposes.
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@end table
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-fsdev option is used along with -device driver "virtio-9p-pci".
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@item -device virtio-9p-pci,fsdev=@var{id},mount_tag=@var{mount_tag}
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Options for virtio-9p-pci driver are:
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-fsdev option is used along with -device driver "virtio-9p-...".
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@item -device virtio-9p-@var{type},fsdev=@var{id},mount_tag=@var{mount_tag}
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Options for virtio-9p-... driver are:
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@table @option
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@item @var{type}
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Specifies the variant to be used. Supported values are "pci", "ccw" or "device",
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depending on the machine type.
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@item fsdev=@var{id}
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Specifies the id value specified along with -fsdev option
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Specifies the id value specified along with -fsdev option.
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@item mount_tag=@var{mount_tag}
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Specifies the tag name to be used by the guest to mount this export point
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Specifies the tag name to be used by the guest to mount this export point.
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@end table
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ETEXI
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DEF("virtfs", HAS_ARG, QEMU_OPTION_virtfs,
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"-virtfs local,path=path,mount_tag=tag,security_model=[mapped-xattr|mapped-file|passthrough|none]\n"
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" [,id=id][,writeout=immediate][,readonly][,socket=socket|sock_fd=sock_fd][,fmode=fmode][,dmode=dmode]\n",
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"-virtfs local,path=path,mount_tag=tag,security_model=mapped-xattr|mapped-file|passthrough|none\n"
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" [,id=id][,writeout=immediate][,readonly][,fmode=fmode][,dmode=dmode]\n"
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"-virtfs proxy,mount_tag=tag,socket=socket[,id=id][,writeout=immediate][,readonly]\n"
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"-virtfs proxy,mount_tag=tag,sock_fd=sock_fd[,id=id][,writeout=immediate][,readonly]\n"
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"-virtfs synth,mount_tag=tag[,id=id][,readonly]\n",
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QEMU_ARCH_ALL)
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STEXI
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@item -virtfs @var{fsdriver}[,path=@var{path}],mount_tag=@var{mount_tag}[,security_model=@var{security_model}][,writeout=@var{writeout}][,readonly][,socket=@var{socket}|sock_fd=@var{sock_fd}][,fmode=@var{fmode}][,dmode=@var{dmode}]
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@item -virtfs local,path=@var{path},mount_tag=@var{mount_tag} ,security_model=@var{security_model}[,writeout=@var{writeout}][,readonly] [,fmode=@var{fmode}][,dmode=@var{dmode}]
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@itemx -virtfs proxy,socket=@var{socket},mount_tag=@var{mount_tag} [,writeout=@var{writeout}][,readonly]
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@itemx -virtfs proxy,sock_fd=@var{sock_fd},mount_tag=@var{mount_tag} [,writeout=@var{writeout}][,readonly]
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@itemx -virtfs synth,mount_tag=@var{mount_tag}
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@findex -virtfs
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The general form of a Virtual File system pass-through options are:
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Define a new filesystem device and expose it to the guest using a virtio-9p-device. The general form of a Virtual File system pass-through options are:
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@table @option
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@item @var{fsdriver}
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This option specifies the fs driver backend to use.
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Currently "local" and "proxy" file system drivers are supported.
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@item local
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Accesses to the filesystem are done by QEMU.
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@item proxy
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Accesses to the filesystem are done by virtfs-proxy-helper(1).
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@item synth
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Synthetic filesystem, only used by QTests.
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@item id=@var{id}
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Specifies identifier for this device
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Specifies identifier for the filesystem device
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@item path=@var{path}
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Specifies the export path for the file system device. Files under
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this path will be available to the 9p client on the guest.
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@ -1348,17 +1385,19 @@ Enables exporting 9p share as a readonly mount for guests. By default
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read-write access is given.
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@item socket=@var{socket}
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Enables proxy filesystem driver to use passed socket file for
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communicating with virtfs-proxy-helper. Usually a helper like libvirt
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will create socketpair and pass one of the fds as sock_fd
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communicating with virtfs-proxy-helper(1). Usually a helper like libvirt
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will create socketpair and pass one of the fds as sock_fd.
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@item sock_fd
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Enables proxy filesystem driver to use passed 'sock_fd' as the socket
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descriptor for interfacing with virtfs-proxy-helper
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descriptor for interfacing with virtfs-proxy-helper(1).
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@item fmode=@var{fmode}
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Specifies the default mode for newly created files on the host. Works only
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with security models "mapped-xattr" and "mapped-file".
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@item dmode=@var{dmode}
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Specifies the default mode for newly created directories on the host. Works
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only with security models "mapped-xattr" and "mapped-file".
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@item mount_tag=@var{mount_tag}
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Specifies the tag name to be used by the guest to mount this export point.
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@end table
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ETEXI
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