From: Nikolaus Rath <Nikolaus@rath.org>
Date: Thu, 20 Oct 2016 22:45:32 +0000 (-0700)
Subject: Turn fuse_operations.nopath_flag into fuse_config.nullpath_ok
X-Git-Tag: fuse-3.0.0rc1~16
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=1d9f26f3736cc4703c2e988d87f5dd119bcd736d;p=qemu-gpiodev%2Flibfuse.git

Turn fuse_operations.nopath_flag into fuse_config.nullpath_ok

Modifying struct fuse_config in the init() handler is the canonical way
to adjust file-system implementation specific settings. There is no need
to have flags in struct fuse_operations.
---

diff --git a/ChangeLog.rst b/ChangeLog.rst
index 7d32ba6..e614e6b 100644
--- a/ChangeLog.rst
+++ b/ChangeLog.rst
@@ -5,6 +5,10 @@ Unreleased Changes
   fuse_config pointer that can be used to adjust high-level API
   specific configuration options.
 
+* The `nopath_flag` field of struct fuse_operations has been
+  removed. Instead, a new `nullpath_ok` flag can now be set
+  in struct fuse_config.
+
 * File systems that use the low-level API and support lookup requests
   for '.' and '..' should continue make sure to set the
   FUSE_CAP_EXPORT_SUPPORT bit in fuse_conn_info->want.
diff --git a/example/passthrough_fh.c b/example/passthrough_fh.c
index f74940d..781f717 100644
--- a/example/passthrough_fh.c
+++ b/example/passthrough_fh.c
@@ -57,6 +57,7 @@ static void *xmp_init(struct fuse_conn_info *conn,
 {
 	(void) conn;
 	cfg->use_ino = 1;
+	cfg->nullpath_ok = 1;
 	return NULL;
 }
 
diff --git a/include/fuse.h b/include/fuse.h
index 3c13c14..e8ff936 100644
--- a/include/fuse.h
+++ b/include/fuse.h
@@ -243,6 +243,19 @@ struct fuse_config {
 	int ac_attr_timeout_set;
 	double ac_attr_timeout;
 
+	/**
+	 * If this option is given the file-system handlers for the
+	 * following operations will not receive path information:
+	 * read, write, flush, release, fsync, readdir, releasedir,
+	 * fsyncdir, lock, ioctl and poll.
+	 *
+	 * For the truncate, getattr, chmod, chown and utimens
+	 * operations the path will be provided only if the file is
+	 * not currently open (i.e., when the struct fuse_file_info
+	 * argument is NULL).
+	 */
+	int nullpath_ok;
+
 	/**
 	 * The remaining options are used by libfuse internally and
 	 * should not be touched.
@@ -250,7 +263,6 @@ struct fuse_config {
 	int show_help;
 	char *modules;
 	int debug;
-	int nopath;
 };
 
 
@@ -277,30 +289,6 @@ struct fuse_config {
  * is also a snapshot of the relevant wiki pages in the doc/ folder.
  */
 struct fuse_operations {
-	/**
-	 * Flag indicating that the path need not be calculated for
-	 * the following operations:
-	 *
-	 * read, write, flush, release, fsync, readdir, releasedir,
-	 * fsyncdir, lock, ioctl and poll
-	 *
-	 * For the following operations, the path will not be
-	 * calculated only if the file is currently open (i.e., the
-	 * struct fuse_file_info argument is non-NULL):
-	 *
-	 * truncate, getattr, chmod, chown, utimens
-	 *
-	 * If this flag is set then the path will not be calculaged even if the
-	 * file wasn't unlinked.  However the path can still be non-NULL if it
-	 * needs to be calculated for some other reason.
-	 */
-	unsigned int flag_nopath:1;
-
-	/**
-	 * Reserved flags, don't set
-	 */
-	unsigned int flag_reserved:31;
-
 	/** Get file attributes.
 	 *
 	 * Similar to stat().  The 'st_dev' and 'st_blksize' fields are
diff --git a/lib/fuse.c b/lib/fuse.c
index 1595cc8..df6e3a0 100644
--- a/lib/fuse.c
+++ b/lib/fuse.c
@@ -1193,7 +1193,7 @@ static int get_path_nullok(struct fuse *f, fuse_ino_t nodeid, char **path)
 {
 	int err = 0;
 
-	if (f->conf.nopath) {
+	if (f->conf.nullpath_ok) {
 		*path = NULL;
 	} else {
 		err = get_path_common(f, nodeid, NULL, path, NULL);
@@ -2958,7 +2958,7 @@ static void fuse_do_release(struct fuse *f, fuse_ino_t ino, const char *path,
 	if(unlink_hidden) {
 		if (path) {
 			fuse_fs_unlink(f->fs, path);
-		} else if (f->conf.nopath) {
+		} else if (f->conf.nullpath_ok) {
 			char *unlinkpath;
 
 			if (get_path(f, ino, &unlinkpath) == 0)
@@ -4480,7 +4480,6 @@ static int fuse_push_module(struct fuse *f, const char *module,
 	}
 	newfs->m = m;
 	f->fs = newfs;
-	f->conf.nopath = newfs->op.flag_nopath && f->conf.nopath;
 	return 0;
 }
 
@@ -4596,7 +4595,6 @@ struct fuse *fuse_new(struct fuse_args *args,
 		goto out_delete_context_key;
 
 	f->fs = fs;
-	f->conf.nopath = fs->op.flag_nopath;
 
 	/* Oh f**k, this is ugly! */
 	if (!fs->op.lock) {
@@ -4650,7 +4648,7 @@ struct fuse *fuse_new(struct fuse_args *args,
 		goto out_free_fs;
 
 	if (f->conf.debug) {
-		fprintf(stderr, "nopath: %i\n", f->conf.nopath);
+		fprintf(stderr, "nullpath_ok: %i\n", f->conf.nullpath_ok);
 	}
 
 	/* Trace topmost layer by default */
diff --git a/lib/modules/iconv.c b/lib/modules/iconv.c
index b0453be..5d1e959 100644
--- a/lib/modules/iconv.c
+++ b/lib/modules/iconv.c
@@ -561,6 +561,8 @@ static void *iconv_init(struct fuse_conn_info *conn,
 {
 	struct iconv *ic = iconv_get();
 	fuse_fs_init(ic->next, conn, cfg);
+	/* Don't touch cfg->nullpath_ok, we can work with
+	   either */
 	return ic;
 }
 
@@ -612,8 +614,6 @@ static const struct fuse_operations iconv_oper = {
 	.lock		= iconv_lock,
 	.flock		= iconv_flock,
 	.bmap		= iconv_bmap,
-
-	.flag_nopath = 1,
 };
 
 static const struct fuse_opt iconv_opts[] = {
diff --git a/lib/modules/subdir.c b/lib/modules/subdir.c
index 708edf3..9478e4e 100644
--- a/lib/modules/subdir.c
+++ b/lib/modules/subdir.c
@@ -547,6 +547,8 @@ static void *subdir_init(struct fuse_conn_info *conn,
 {
 	struct subdir *d = subdir_get();
 	fuse_fs_init(d->next, conn, cfg);
+	/* Don't touch cfg->nullpath_ok, we can work with
+	   either */
 	return d;
 }
 
@@ -594,8 +596,6 @@ static const struct fuse_operations subdir_oper = {
 	.lock		= subdir_lock,
 	.flock		= subdir_flock,
 	.bmap		= subdir_bmap,
-
-	.flag_nopath = 1,
 };
 
 static const struct fuse_opt subdir_opts[] = {