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Commit 752727a1 authored by Sage Weil's avatar Sage Weil
Browse files

ceph: add file layout validation 



This tracks updates to code shared with userspace.

Signed-off-by: default avatarSage Weil <sage@newdream.net>
parent 13e38c8a

fs/ceph/ceph_fs.c

+24 −0
Original line number Diff line number Diff line
@@ -3,6 +3,30 @@ 
 */

#include "types.h"



/*

 * return true if @layout appears to be valid

 */

int ceph_file_layout_is_valid(const struct ceph_file_layout *layout)

{

	__u32 su = le32_to_cpu(layout->fl_stripe_unit);

	__u32 sc = le32_to_cpu(layout->fl_stripe_count);

	__u32 os = le32_to_cpu(layout->fl_object_size);



	/* stripe unit, object size must be non-zero, 64k increment */

	if (!su || (su & (CEPH_MIN_STRIPE_UNIT-1)))

		return 0;

	if (!os || (os & (CEPH_MIN_STRIPE_UNIT-1)))

		return 0;

	/* object size must be a multiple of stripe unit */

	if (os < su || os % su)

		return 0;

	/* stripe count must be non-zero */

	if (!sc)

		return 0;

	return 1;

}





int ceph_flags_to_mode(int flags)

{

#ifdef O_DIRECTORY  /* fixme */

fs/ceph/ceph_fs.h

+2 −0
Original line number Diff line number Diff line
@@ -72,7 +72,9 @@ struct ceph_file_layout { 
	__le32 fl_pg_pool;      /* namespace, crush ruleset, rep level */

} __attribute__ ((packed));



#define CEPH_MIN_STRIPE_UNIT 65536



int ceph_file_layout_is_valid(const struct ceph_file_layout *layout);





/*********************************************