hw/9pfs: Move opt validation to FsDriver callback

This remove all conditional code from common code path and
make opt validation a FSDriver callback.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

3 files changed, 19 insertions, 50 deletions

diff --git a/fsdev/file-op-9p.h b/fsdev/file-op-9p.h
index c823fe0..7ef14af 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;