From: "Aneesh Kumar K.V" <aneesh.ku...@linux.vnet.ibm.com>
This remove all conditional code from common code path and
make opt validation a FSDriver callback.
Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.vnet.ibm.com>
Signed-off-by: M. Mohan Kumar <mo...@in.ibm.com>
---
fsdev/file-op-9p.h | 15 +++++++++++++--
fsdev/qemu-fsdev.c | 44 ++++++--------------------------------------
fsdev/qemu-fsdev.h | 10 ----------
hw/9pfs/virtio-9p-device.c | 13 ++++++++-----
hw/9pfs/virtio-9p-handle.c | 20 ++++++++++++++++++++
hw/9pfs/virtio-9p-local.c | 34 ++++++++++++++++++++++++++++++++++
vl.c | 8 ++------
7 files changed, 83 insertions(+), 61 deletions(-)
diff --git a/fsdev/file-op-9p.h b/fsdev/file-op-9p.h
index a85ecd3..73de79f 100644
--- a/fsdev/file-op-9p.h
+++ b/fsdev/file-op-9p.h
@@ -61,6 +61,16 @@ typedef struct extended_ops {
#define V9FS_SEC_MASK 0x0000001C
+typedef struct FileOperations FileOperations;
+/*
+ * Structure to store the various fsdev's passed through command line.
+ */
+typedef struct FsDriverEntry {
+ char *fsdev_id;
+ char *path;
+ int export_flags;
+ FileOperations *ops;
+} FsDriverEntry;
typedef struct FsContext
{
@@ -82,8 +92,9 @@ typedef union V9fsFidOpenState V9fsFidOpenState;
void cred_init(FsCred *);
-typedef struct FileOperations
+struct FileOperations
{
+ int (*parse_opts)(QemuOpts *, struct FsDriverEntry *);
int (*init)(struct FsContext *);
int (*lstat)(FsContext *, V9fsPath *, struct stat *);
ssize_t (*readlink)(FsContext *, V9fsPath *, char *, size_t);
@@ -128,6 +139,6 @@ typedef struct FileOperations
V9fsPath *newdir, const char *new_name);
int (*unlinkat)(FsContext *ctx, V9fsPath *dir, const char *name, int
flags);
void *opaque;
-} FileOperations;
+};
#endif
diff --git a/fsdev/qemu-fsdev.c b/fsdev/qemu-fsdev.c
index 6684f7e..00f48ab 100644
--- a/fsdev/qemu-fsdev.c
+++ b/fsdev/qemu-fsdev.c
@@ -31,12 +31,10 @@ static FsDriverTable FsDrivers[] = {
int qemu_fsdev_add(QemuOpts *opts)
{
- struct FsDriverListEntry *fsle;
int i;
+ struct FsDriverListEntry *fsle;
const char *fsdev_id = qemu_opts_id(opts);
const char *fsdriver = qemu_opt_get(opts, "fsdriver");
- const char *path = qemu_opt_get(opts, "path");
- const char *sec_model = qemu_opt_get(opts, "security_model");
const char *writeout = qemu_opt_get(opts, "writeout");
bool ro = qemu_opt_get_bool(opts, "readonly", 0);
@@ -61,29 +59,9 @@ int qemu_fsdev_add(QemuOpts *opts)
return -1;
}
- if (!strcmp(fsdriver, "local") && !sec_model) {
- fprintf(stderr, "security model not specified, "
- "local fs needs security model\nvalid options are:"
- "\tsecurity_model=[passthrough|mapped|none]\n");
- return -1;
- }
-
- if (strcmp(fsdriver, "local") && sec_model) {
- fprintf(stderr, "only local fs driver needs security model\n");
- return -1;
- }
-
- if (!path) {
- fprintf(stderr, "fsdev: No path specified.\n");
- return -1;
- }
-
- fsle = g_malloc(sizeof(*fsle));
-
+ fsle = g_malloc0(sizeof(*fsle));
fsle->fse.fsdev_id = g_strdup(fsdev_id);
- fsle->fse.path = g_strdup(path);
fsle->fse.ops = FsDrivers[i].ops;
- fsle->fse.export_flags = 0;
if (writeout) {
if (!strcmp(writeout, "immediate")) {
fsle->fse.export_flags |= V9FS_IMMEDIATE_WRITEOUT;
@@ -95,22 +73,12 @@ int qemu_fsdev_add(QemuOpts *opts)
fsle->fse.export_flags &= ~V9FS_RDONLY;
}
- if (strcmp(fsdriver, "local")) {
- goto done;
+ if (fsle->fse.ops->parse_opts) {
+ if (fsle->fse.ops->parse_opts(opts, &fsle->fse)) {
+ return -1;
+ }
}
- if (!strcmp(sec_model, "passthrough")) {
- fsle->fse.export_flags |= V9FS_SM_PASSTHROUGH;
- } else if (!strcmp(sec_model, "mapped")) {
- fsle->fse.export_flags |= V9FS_SM_MAPPED;
- } else if (!strcmp(sec_model, "none")) {
- fsle->fse.export_flags |= V9FS_SM_NONE;
- } else {
- fprintf(stderr, "Invalid security model %s specified, valid options
are"
- "\n\t [passthrough|mapped|none]\n", sec_model);
- return -1;
- }
-done:
QTAILQ_INSERT_TAIL(&fsdriver_entries, fsle, next);
return 0;
}
diff --git a/fsdev/qemu-fsdev.h b/fsdev/qemu-fsdev.h
index 8ef8473..921452d 100644
--- a/fsdev/qemu-fsdev.h
+++ b/fsdev/qemu-fsdev.h
@@ -34,16 +34,6 @@ typedef struct FsDriverTable {
FileOperations *ops;
} FsDriverTable;
-/*
- * Structure to store the various fsdev's passed through command line.
- */
-typedef struct FsDriverEntry {
- char *fsdev_id;
- char *path;
- int export_flags;
- FileOperations *ops;
-} FsDriverEntry;
-
typedef struct FsDriverListEntry {
FsDriverEntry fse;
QTAILQ_ENTRY(FsDriverListEntry) next;
diff --git a/hw/9pfs/virtio-9p-device.c b/hw/9pfs/virtio-9p-device.c
index cd343e1..642d5e2 100644
--- a/hw/9pfs/virtio-9p-device.c
+++ b/hw/9pfs/virtio-9p-device.c
@@ -77,16 +77,19 @@ VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf
*conf)
exit(1);
}
- if (!fse->path || !conf->tag) {
- /* we haven't specified a mount_tag or the path */
- fprintf(stderr, "fsdev with id %s needs path "
- "and Virtio-9p device needs mount_tag arguments\n",
+ if (!conf->tag) {
+ /* we haven't specified a mount_tag */
+ fprintf(stderr, "fsdev with id %s needs mount_tag arguments\n",
conf->fsdev_id);
exit(1);
}
s->ctx.export_flags = fse->export_flags;
- s->ctx.fs_root = g_strdup(fse->path);
+ if (fse->path) {
+ s->ctx.fs_root = g_strdup(fse->path);
+ } else {
+ s->ctx.fs_root = NULL;
+ }
s->ctx.exops.get_st_gen = NULL;
if (fse->export_flags & V9FS_SM_PASSTHROUGH) {
diff --git a/hw/9pfs/virtio-9p-handle.c b/hw/9pfs/virtio-9p-handle.c
index f97d898..dbecc4c 100644
--- a/hw/9pfs/virtio-9p-handle.c
+++ b/hw/9pfs/virtio-9p-handle.c
@@ -641,7 +641,27 @@ out:
return ret;
}
+static int handle_parse_opts(QemuOpts *opts, struct FsDriverEntry *fse)
+{
+ const char *sec_model = qemu_opt_get(opts, "security_model");
+ const char *path = qemu_opt_get(opts, "path");
+
+ if (sec_model) {
+ fprintf(stderr, "Invalid argument security_model specified with handle
fsdriver\n");
+ return -1;
+ }
+
+ if (!path) {
+ fprintf(stderr, "fsdev: No path specified.\n");
+ return -1;
+ }
+ fse->path = g_strdup(path);
+ return 0;
+
+}
+
FileOperations handle_ops = {
+ .parse_opts = handle_parse_opts,
.init = handle_init,
.lstat = handle_lstat,
.readlink = handle_readlink,
diff --git a/hw/9pfs/virtio-9p-local.c b/hw/9pfs/virtio-9p-local.c
index 371a94d..3ae6ef2 100644
--- a/hw/9pfs/virtio-9p-local.c
+++ b/hw/9pfs/virtio-9p-local.c
@@ -756,7 +756,41 @@ static int local_init(FsContext *ctx)
return err;
}
+static int local_parse_opts(QemuOpts *opts, struct FsDriverEntry *fse)
+{
+ const char *sec_model = qemu_opt_get(opts, "security_model");
+ const char *path = qemu_opt_get(opts, "path");
+
+ if (!sec_model) {
+ fprintf(stderr, "security model not specified, "
+ "local fs needs security model\nvalid options are:"
+ "\tsecurity_model=[passthrough|mapped|none]\n");
+ return -1;
+ }
+
+ if (!strcmp(sec_model, "passthrough")) {
+ fse->export_flags |= V9FS_SM_PASSTHROUGH;
+ } else if (!strcmp(sec_model, "mapped")) {
+ fse->export_flags |= V9FS_SM_MAPPED;
+ } else if (!strcmp(sec_model, "none")) {
+ fse->export_flags |= V9FS_SM_NONE;
+ } else {
+ fprintf(stderr, "Invalid security model %s specified, valid options
are"
+ "\n\t [passthrough|mapped|none]\n", sec_model);
+ return -1;
+ }
+
+ if (!path) {
+ fprintf(stderr, "fsdev: No path specified.\n");
+ return -1;
+ }
+ fse->path = g_strdup(path);
+
+ return 0;
+}
+
FileOperations local_ops = {
+ .parse_opts = local_parse_opts,
.init = local_init,
.lstat = local_lstat,
.readlink = local_readlink,
diff --git a/vl.c b/vl.c
index 5372a96..0096865 100644
--- a/vl.c
+++ b/vl.c
@@ -2683,11 +2683,8 @@ int main(int argc, char **argv, char **envp)
}
if (qemu_opt_get(opts, "fsdriver") == NULL ||
- qemu_opt_get(opts, "mount_tag") == NULL ||
- qemu_opt_get(opts, "path") == NULL) {
- fprintf(stderr, "Usage: -virtfs
fsdriver,path=/share_path/,"
- "[security_model={mapped|passthrough|none}],"
- "mount_tag=tag.\n");
+ qemu_opt_get(opts, "mount_tag") == NULL) {
+ fprintf(stderr, "Usage: -virtfs
fsdriver,mount_tag=tag.\n");
exit(1);
}
fsdev = qemu_opts_create(qemu_find_opts("fsdev"),
@@ -2733,7 +2730,6 @@ int main(int argc, char **argv, char **envp)
exit(1);
}
qemu_opt_set(fsdev, "fsdriver", "synth");
- qemu_opt_set(fsdev, "path", "/"); /* ignored */
device = qemu_opts_create(qemu_find_opts("device"), NULL, 0);
qemu_opt_set(device, "driver", "virtio-9p-pci");
--
1.7.6
