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vl.c: Replace -virtfs string manipulation with QemuOpts

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The -virtfs option creates an fsdev representing the pass-through file
system and a guest-visible virtio-9p-pci device that can access this
file system.  This patch replaces the string manipulation used to build
and reparse option lists with direct QemuOpts calls.  Removing the
string manipulation code makes it easier to maintain and less error
prone.

An error message is also updated to use "mount_tag" instead of
"mnt_tag".

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
This commit is contained in:
Stefan Hajnoczi 2011-03-16 08:31:43 +00:00 committed by Venkateswararao Jujjuri
parent 4f8dee2dec
commit e14ea479b3
1 changed files with 18 additions and 36 deletions
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54
vl.c
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@ -2447,9 +2447,8 @@ int main(int argc, char **argv, char **envp)
}
break;
case QEMU_OPTION_virtfs: {
char *arg_fsdev = NULL;
char *arg_9p = NULL;
int len = 0;
QemuOpts *fsdev;
QemuOpts *device;
olist = qemu_find_opts("virtfs");
if (!olist) {
@ -2468,45 +2467,28 @@ int main(int argc, char **argv, char **envp)
qemu_opt_get(opts, "security_model") == NULL) {
fprintf(stderr, "Usage: -virtfs fstype,path=/share_path/,"
"security_model=[mapped|passthrough|none],"
"mnt_tag=tag.\n");
"mount_tag=tag.\n");
exit(1);
}
len = strlen(",id=,path=,security_model=");
len += strlen(qemu_opt_get(opts, "fstype"));
len += strlen(qemu_opt_get(opts, "mount_tag"));
len += strlen(qemu_opt_get(opts, "path"));
len += strlen(qemu_opt_get(opts, "security_model"));
arg_fsdev = qemu_malloc((len + 1) * sizeof(*arg_fsdev));
snprintf(arg_fsdev, (len + 1) * sizeof(*arg_fsdev),
"%s,id=%s,path=%s,security_model=%s",
qemu_opt_get(opts, "fstype"),
qemu_opt_get(opts, "mount_tag"),
qemu_opt_get(opts, "path"),
qemu_opt_get(opts, "security_model"));
len = strlen("virtio-9p,fsdev=,mount_tag=");
len += 2*strlen(qemu_opt_get(opts, "mount_tag"));
arg_9p = qemu_malloc((len + 1) * sizeof(*arg_9p));
snprintf(arg_9p, (len + 1) * sizeof(*arg_9p),
"virtio-9p,fsdev=%s,mount_tag=%s",
qemu_opt_get(opts, "mount_tag"),
qemu_opt_get(opts, "mount_tag"));
if (!qemu_opts_parse(qemu_find_opts("fsdev"), arg_fsdev, 1)) {
fprintf(stderr, "parse error [fsdev]: %s\n", optarg);
fsdev = qemu_opts_create(qemu_find_opts("fsdev"),
qemu_opt_get(opts, "mount_tag"), 1);
if (!fsdev) {
fprintf(stderr, "duplicate fsdev id: %s\n",
qemu_opt_get(opts, "mount_tag"));
exit(1);
}
qemu_opt_set(fsdev, "fstype", qemu_opt_get(opts, "fstype"));
qemu_opt_set(fsdev, "path", qemu_opt_get(opts, "path"));
qemu_opt_set(fsdev, "security_model",
qemu_opt_get(opts, "security_model"));
if (!qemu_opts_parse(qemu_find_opts("device"), arg_9p, 1)) {
fprintf(stderr, "parse error [device]: %s\n", optarg);
exit(1);
}
qemu_free(arg_fsdev);
qemu_free(arg_9p);
device = qemu_opts_create(qemu_find_opts("device"), NULL, 0);
qemu_opt_set(device, "driver", "virtio-9p-pci");
qemu_opt_set(device, "fsdev",
qemu_opt_get(opts, "mount_tag"));
qemu_opt_set(device, "mount_tag",
qemu_opt_get(opts, "mount_tag"));
break;
}
case QEMU_OPTION_serial: