[Ocfs2-tools-devel] [PATCH 10/19] Ocfs2-tools: Add running codes for '--fs-features' in operation.c

[Tristan Ye]

Task of dumping fs features will also be capable of two approaches,
including libocfs2 and ioctl methods.

Signed-off-by: Tristan Ye <tristan.ye at oracle.com>
---
 o2info/operations.c |  118 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 118 insertions(+), 0 deletions(-)

diff --git a/o2info/operations.c b/o2info/operations.c
index 6f2c9c7..cd134e5 100644
--- a/o2info/operations.c
+++ b/o2info/operations.c
@@ -201,3 +201,121 @@ out:
 DEFINE_O2INFO_OP(volinfo,
 		 volinfo_run,
 		 NULL);
+
+struct o2info_fs_features {
+	uint32_t compat;
+	uint32_t incompat;
+	uint32_t rocompat;
+};
+
+static int get_fs_features_ioctl(struct o2info_operation *op,
+				 int fd,
+				 struct o2info_fs_features *ofs)
+{
+	int rc = 0;
+	struct ocfs2_info_fs_features frq;
+
+	memset(ofs, 0, sizeof(*ofs));
+
+	o2info_fill_request(&frq, OCFS2_INFO_FS_FEATURES, no_coherency);
+
+	uint64_t reqs[1] = {(unsigned long)&frq};
+
+	struct ocfs2_info info = {
+		.info_requests = (uint64_t)reqs,
+		.info_count = 1,
+	};
+
+	rc = ioctl(fd, OCFS2_IOC_INFO, &info);
+	if (rc) {
+		rc = errno;
+		o2i_error(op, "ioctl failed: %s\n", strerror(rc));
+		goto out;
+	}
+
+	if (frq.ir_request.ir_flags & OCFS2_INFO_FL_FILLED) {
+		ofs->compat = frq.ir_compat_features;
+		ofs->incompat = frq.ir_incompat_features;
+		ofs->rocompat = frq.ir_ro_compat_features;
+	}
+
+out:
+	return rc;
+}
+
+static int get_fs_features_libocfs2(struct o2info_operation *op,
+				    ocfs2_filesys *fs,
+				    struct o2info_fs_features *ofs)
+{
+	int rc = 0;
+	struct ocfs2_super_block *sb = NULL;
+
+	memset(ofs, 0, sizeof(*ofs));
+
+	sb = OCFS2_RAW_SB(fs->fs_super);
+	ofs->compat = sb->s_feature_compat;
+	ofs->incompat = sb->s_feature_incompat;
+	ofs->rocompat = sb->s_feature_ro_compat;
+
+	return rc;
+}
+
+static int fs_features_run(struct o2info_operation *op,
+			   struct o2info_method *om,
+			   void *arg)
+{
+	int rc = 0;
+	static struct o2info_fs_features ofs;
+
+	char *compat = NULL;
+	char *incompat = NULL;
+	char *rocompat = NULL;
+
+	const char *items[] = {
+		"Feature Compat:",
+		"Feature Incompat:",
+		"Feature RO compat:"
+	};
+
+	if (om->om_method == O2INFO_USE_IOCTL)
+		rc = get_fs_features_ioctl(op, om->om_fd, &ofs);
+	else
+		rc = get_fs_features_libocfs2(op, om->om_fs, &ofs);
+	if (rc)
+		goto out;
+
+	rc = o2info_get_compat_flag(ofs.compat, &compat);
+	if (rc)
+		goto out;
+
+	rc = o2info_get_incompat_flag(ofs.incompat, &incompat);
+	if (rc)
+		goto out;
+
+	rc = o2info_get_rocompat_flag(ofs.rocompat, &rocompat);
+	if (rc)
+		goto out;
+
+	fprintf(stdout, "   %s %u %s\n", items[0], ofs.compat,
+		compat);
+	fprintf(stdout, " %s %u %s\n", items[1], ofs.incompat,
+		incompat);
+	fprintf(stdout, "%s %u %s\n", items[2], ofs.rocompat,
+		rocompat);
+
+out:
+	if (compat)
+		ocfs2_free(&compat);
+
+	if (incompat)
+		ocfs2_free(&incompat);
+
+	if (rocompat)
+		ocfs2_free(&rocompat);
+
+	return rc;
+}
+
+DEFINE_O2INFO_OP(fs_features,
+		 fs_features_run,
+		 NULL);
-- 
1.5.5