9p: Move a couple xattr functions to 9p-util

These functions will need custom implementations on Darwin. Since the
implementation is very similar among all of them, and 9p-util already
has the _nofollow version of fgetxattrat, let's move them all there.

Signed-off-by: Keno Fischer <keno@juliacomputing.com>
Signed-off-by: Greg Kurz <groug@kaod.org>

hw/9pfs/9p-util.c

@@ -24,3 +24,36 @@ ssize_t fgetxattrat_nofollow(int dirfd, const char *filename, const char *name,
     g_free(proc_path);
     return ret;
 }
+
+ssize_t flistxattrat_nofollow(int dirfd, const char *filename,
+                              char *list, size_t size)
+{
+    char *proc_path = g_strdup_printf("/proc/self/fd/%d/%s", dirfd, filename);
+    int ret;
+
+    ret = llistxattr(proc_path, list, size);
+    g_free(proc_path);
+    return ret;
+}
+
+ssize_t fremovexattrat_nofollow(int dirfd, const char *filename,
+                                const char *name)
+{
+    char *proc_path = g_strdup_printf("/proc/self/fd/%d/%s", dirfd, filename);
+    int ret;
+
+    ret = lremovexattr(proc_path, name);
+    g_free(proc_path);
+    return ret;
+}
+
+int fsetxattrat_nofollow(int dirfd, const char *filename, const char *name,
+                         void *value, size_t size, int flags)
+{
+    char *proc_path = g_strdup_printf("/proc/self/fd/%d/%s", dirfd, filename);
+    int ret;
+
+    ret = lsetxattr(proc_path, name, value, size, flags);
+    g_free(proc_path);
+    return ret;
+}

hw/9pfs/9p-util.h

@@ -60,5 +60,9 @@ ssize_t fgetxattrat_nofollow(int dirfd, const char *path, const char *name,
                              void *value, size_t size);
 int fsetxattrat_nofollow(int dirfd, const char *path, const char *name,
                          void *value, size_t size, int flags);
+ssize_t flistxattrat_nofollow(int dirfd, const char *filename,
+                              char *list, size_t size);
+ssize_t fremovexattrat_nofollow(int dirfd, const char *filename,
+                                const char *name);
 
 #endif

hw/9pfs/9p-xattr.c

@@ -60,17 +60,6 @@ ssize_t pt_listxattr(FsContext *ctx, const char *path,
     return name_size;
 }
 
-static ssize_t flistxattrat_nofollow(int dirfd, const char *filename,
-                                     char *list, size_t size)
-{
-    char *proc_path = g_strdup_printf("/proc/self/fd/%d/%s", dirfd, filename);
-    int ret;
-
-    ret = llistxattr(proc_path, list, size);
-    g_free(proc_path);
-    return ret;
-}
-
 /*
  * Get the list and pass to each layer to find out whether
  * to send the data or not
@@ -196,17 +185,6 @@ ssize_t pt_getxattr(FsContext *ctx, const char *path, const char *name,
     return local_getxattr_nofollow(ctx, path, name, value, size);
 }
 
-int fsetxattrat_nofollow(int dirfd, const char *filename, const char *name,
-                         void *value, size_t size, int flags)
-{
-    char *proc_path = g_strdup_printf("/proc/self/fd/%d/%s", dirfd, filename);
-    int ret;
-
-    ret = lsetxattr(proc_path, name, value, size, flags);
-    g_free(proc_path);
-    return ret;
-}
-
 ssize_t local_setxattr_nofollow(FsContext *ctx, const char *path,
                                 const char *name, void *value, size_t size,
                                 int flags)
@@ -235,17 +213,6 @@ int pt_setxattr(FsContext *ctx, const char *path, const char *name, void *value,
     return local_setxattr_nofollow(ctx, path, name, value, size, flags);
 }
 
-static ssize_t fremovexattrat_nofollow(int dirfd, const char *filename,
-                                       const char *name)
-{
-    char *proc_path = g_strdup_printf("/proc/self/fd/%d/%s", dirfd, filename);
-    int ret;
-
-    ret = lremovexattr(proc_path, name);
-    g_free(proc_path);
-    return ret;
-}
-
 ssize_t local_removexattr_nofollow(FsContext *ctx, const char *path,
                                    const char *name)
 {