[Ocfs2-tools-devel] [PATCH 09/19] Ocfs2-tools: Add running codes for '--volinfo' in operation.c

[Tristan Ye]

Task of '--volinfo' will be capable of two approaches, including
libocfs2 and ioctl solutions.

Signed-off-by: Tristan Ye <tristan.ye at oracle.com>
---
 o2info/operations.c |  134 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 134 insertions(+), 0 deletions(-)

diff --git a/o2info/operations.c b/o2info/operations.c
index fbb9d18..6f2c9c7 100644
--- a/o2info/operations.c
+++ b/o2info/operations.c
@@ -67,3 +67,137 @@ static void o2i_error(struct o2info_operation *op, const char *fmt, ...)
 
 	return;
 }
+
+struct o2info_volinfo {
+	uint32_t blocksize;
+	uint32_t clustersize;
+	uint16_t slotnum;
+	uint8_t label[OCFS2_INFO_MAX_VOL_LABEL_LEN];
+	union {
+		uint8_t uuid_str[OCFS2_INFO_VOL_UUIDSTR_LEN];
+		uint8_t uuid[OCFS2_INFO_VOL_UUID_LEN];
+	};
+};
+
+static int get_volinfo_libocfs2(struct o2info_operation *op,
+				ocfs2_filesys *fs,
+				struct o2info_volinfo *vf)
+{
+	int rc = 0;
+	struct ocfs2_super_block *sb = NULL;
+
+	memset(vf, 0, sizeof(*vf));
+
+	sb = OCFS2_RAW_SB(fs->fs_super);
+	vf->blocksize = fs->fs_blocksize;
+	vf->clustersize = fs->fs_clustersize;
+	vf->slotnum = sb->s_max_slots;
+	memcpy(vf->label, sb->s_label, OCFS2_INFO_MAX_VOL_LABEL_LEN);
+	memcpy(vf->uuid, sb->s_uuid, OCFS2_INFO_VOL_UUID_LEN);
+
+	return rc;
+}
+
+static int get_volinfo_ioctl(struct o2info_operation *op,
+			     int fd,
+			     struct o2info_volinfo *vf)
+{
+	int rc = 0;
+
+	struct ocfs2_info_blocksize brq;
+	struct ocfs2_info_clustersize crq;
+	struct ocfs2_info_slotnum srq;
+	struct ocfs2_info_label lrq;
+	struct ocfs2_info_uuid urq;
+
+	memset(vf, 0, sizeof(*vf));
+
+	o2info_fill_request(&brq, OCFS2_INFO_BLOCKSIZE, no_coherency);
+	o2info_fill_request(&crq, OCFS2_INFO_CLUSTERSIZE, no_coherency);
+	o2info_fill_request(&srq, OCFS2_INFO_SLOTNUM, no_coherency);
+	o2info_fill_request(&lrq, OCFS2_INFO_LABEL, no_coherency);
+	o2info_fill_request(&urq, OCFS2_INFO_UUID, no_coherency);
+
+	uint64_t reqs[5] = {(unsigned long)&brq,
+			    (unsigned long)&crq,
+			    (unsigned long)&srq,
+			    (unsigned long)&lrq,
+			    (unsigned long)&urq};
+
+	struct ocfs2_info info = {
+		.info_requests = (uint64_t)reqs,
+		.info_count = 5,
+	};
+
+	rc = ioctl(fd, OCFS2_IOC_INFO, &info);
+	if (rc) {
+		rc = errno;
+		o2i_error(op, "ioctl failed: %s\n", strerror(rc));
+		goto out;
+	}
+
+	if (brq.ir_request.ir_flags & OCFS2_INFO_FL_FILLED)
+		vf->blocksize = brq.ir_blocksize;
+
+	if (crq.ir_request.ir_flags & OCFS2_INFO_FL_FILLED)
+		vf->clustersize = crq.ir_clustersize;
+
+	if (srq.ir_request.ir_flags & OCFS2_INFO_FL_FILLED)
+		vf->slotnum = srq.ir_slotnum;
+
+	if (lrq.ir_request.ir_flags & OCFS2_INFO_FL_FILLED)
+		memcpy(vf->label, lrq.ir_label, OCFS2_INFO_MAX_VOL_LABEL_LEN);
+
+	if (urq.ir_request.ir_flags & OCFS2_INFO_FL_FILLED)
+		memcpy(vf->uuid_str, urq.ir_uuid_str,
+		       OCFS2_INFO_VOL_UUIDSTR_LEN);
+
+out:
+	return rc;
+}
+
+static int volinfo_run(struct o2info_operation *op,
+		       struct o2info_method *om,
+		       void *arg)
+{
+	int i, rc = 0;
+	static struct o2info_volinfo vf;
+
+	const char *items[] = {
+		"Block Size:",
+		"Cluster Size:",
+		"Node Slots:",
+		"Label:",
+		"UUID:"
+	};
+
+	if (om->om_method == O2INFO_USE_IOCTL)
+		rc = get_volinfo_ioctl(op, om->om_fd, &vf);
+	else
+		rc = get_volinfo_libocfs2(op, om->om_fs, &vf);
+	if (rc)
+		goto out;
+
+	fprintf(stdout, "  %s %u\n", items[0], vf.blocksize);
+	fprintf(stdout, "%s %u\n", items[1], vf.clustersize);
+	fprintf(stdout, "  %s %u\n", items[2], vf.slotnum);
+	fprintf(stdout, "       %s %.*s\n", items[3],
+		OCFS2_INFO_MAX_VOL_LABEL_LEN, vf.label);
+	fprintf(stdout, "        %s ", items[4]);
+	if (om->om_method == O2INFO_USE_IOCTL) {
+		for (i = 0; i < OCFS2_INFO_VOL_UUIDSTR_LEN; i++)
+			fprintf(stdout, "%c", vf.uuid_str[i]);
+	} else {
+		for (i = 0; i < OCFS2_INFO_VOL_UUID_LEN; i++)
+			fprintf(stdout, "%02X", vf.uuid[i]);
+	}
+
+	fprintf(stdout, "\n");
+
+out:
+	return rc;
+}
+
+DEFINE_O2INFO_OP(volinfo,
+		 volinfo_run,
+		 NULL);
-- 
1.5.5