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| author | Chris Webb <chris@arachsys.com> | 2011-11-24 17:05:18 +0000 |
|---|---|---|
| committer | Michael Tokarev <mjt@tls.msk.ru> | 2017-05-10 10:19:23 +0300 |
| commit | 3baa0a6a658e3a17a79d95440e5c949b2b13bb6e (patch) | |
| tree | 5b9bb21960ebb1c30026825b04efa76b4e279289 | |
| parent | 6516367fc0803d079384e0ad370856ac328bef30 (diff) | |
| download | qemu-3baa0a6a658e3a17a79d95440e5c949b2b13bb6e.tar.gz | |
virtfs: allow a device id to be specified in the -virtfs option
When using a virtfs root filesystem, the mount_tag needs to be set to
/dev/root. This can be done long-hand as
-fsdev local,id=root,path=/path/to/rootfs,...
-device virtio-9p-pci,fsdev=root,mount_tag=/dev/root
but the -virtfs shortcut cannot be used as it hard-codes the device identifier
to match the mount_tag, and device identifiers may not contain '/':
$ qemu-system-x86_64 -virtfs local,path=/foo,mount_tag=/dev/root,security_model=passthrough
qemu-system-x86_64: -virtfs local,path=/foo,mount_tag=/dev/root,security_model=passthrough: duplicate fsdev id: /dev/root
To support this case using -virtfs, we allow the device identifier to be
specified explicitly when the mount_tag is not suitable:
-virtfs local,id=root,path=/path/to/rootfs,mount_tag=/dev/root,...
Signed-off-by: Chris Webb <chris@arachsys.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
| -rw-r--r-- | qemu-options.hx | 2 | ||||
| -rw-r--r-- | vl.c | 5 |
2 files changed, 4 insertions, 3 deletions
diff --git a/qemu-options.hx b/qemu-options.hx index a24fef2107..a5b0589cb7 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -876,7 +876,7 @@ ETEXI DEF("virtfs", HAS_ARG, QEMU_OPTION_virtfs, "-virtfs local,path=path,mount_tag=tag,security_model=[mapped-xattr|mapped-file|passthrough|none]\n" - " [,writeout=immediate][,readonly][,socket=socket|sock_fd=sock_fd]\n", + " [,id=id][,writeout=immediate][,readonly][,socket=socket|sock_fd=sock_fd]\n", QEMU_ARCH_ALL) STEXI @@ -3524,10 +3524,11 @@ int main(int argc, char **argv, char **envp) exit(1); } fsdev = qemu_opts_create(qemu_find_opts("fsdev"), + qemu_opts_id(opts) ?: qemu_opt_get(opts, "mount_tag"), 1, NULL); if (!fsdev) { - error_report("duplicate fsdev id: %s", + error_report("duplicate or invalid fsdev id: %s", qemu_opt_get(opts, "mount_tag")); exit(1); } @@ -3565,7 +3566,7 @@ int main(int argc, char **argv, char **envp) &error_abort); qemu_opt_set(device, "driver", "virtio-9p-pci", &error_abort); qemu_opt_set(device, "fsdev", - qemu_opt_get(opts, "mount_tag"), &error_abort); + qemu_opts_id(fsdev), &error_abort); qemu_opt_set(device, "mount_tag", qemu_opt_get(opts, "mount_tag"), &error_abort); break; |