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

[Sunil Mushran]

Tristan Ye wrote:
> 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);
>   

Why not use fs->uuid_str?

> +
> +	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:"
> +	};
>   


#define VOLINFO \
"Block Size  : %u\n"
"Cluster Size: %u\n"
"Max Slots   : %u\n"
"Volume Label: %s\n"
"Volume UUID : %s\n";

fprintf(stdout, VOLINFO, vf.blocksize, ...);



> +
> +	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);
>