Commit c74d79af authored by Jeff Layton's avatar Jeff Layton Committed by Ilya Dryomov
Browse files

ceph: comment cleanups and clarifications 



Signed-off-by: default avatarJeff Layton <jlayton@kernel.org>
Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
parent 16d68903

fs/ceph/caps.c

+16 −0
Original line number Diff line number Diff line
@@ -1922,12 +1922,24 @@ void ceph_check_caps(struct ceph_inode_info *ci, int flags, 
retry:

	spin_lock(&ci->i_ceph_lock);

retry_locked:

	/* Caps wanted by virtue of active open files. */

	file_wanted = __ceph_caps_file_wanted(ci);



	/* Caps which have active references against them */

	used = __ceph_caps_used(ci);



	/*

	 * "issued" represents the current caps that the MDS wants us to have.

	 * "implemented" is the set that we have been granted, and includes the

	 * ones that have not yet been returned to the MDS (the "revoking" set,

	 * usually because they have outstanding references).

	 */

	issued = __ceph_caps_issued(ci, &implemented);

	revoking = implemented & ~issued;



	want = file_wanted;



	/* The ones we currently want to retain (may be adjusted below) */

	retain = file_wanted | used | CEPH_CAP_PIN;

	if (!mdsc->stopping && inode->i_nlink > 0) {

		if (file_wanted) {
@@ -2005,6 +2017,10 @@ void ceph_check_caps(struct ceph_inode_info *ci, int flags, 


		/* NOTE: no side-effects allowed, until we take s_mutex */



		/*

		 * If we have an auth cap, we don't need to consider any

		 * overlapping caps as used.

		 */

		cap_used = used;

		if (ci->i_auth_cap && cap != ci->i_auth_cap)

			cap_used &= ~ci->i_auth_cap->issued;

fs/ceph/mds_client.h

+1 −1
Original line number Diff line number Diff line
@@ -393,7 +393,7 @@ struct ceph_mds_client { 


	struct ceph_mds_session **sessions;    /* NULL for mds if no session */

	atomic_t		num_sessions;

	int                     max_sessions;  /* len of s_mds_sessions */

	int                     max_sessions;  /* len of sessions array */

	int                     stopping;      /* true if shutting down */



	atomic64_t		quotarealms_count; /* # realms with quota */

fs/ceph/super.h

+2 −1
Original line number Diff line number Diff line
@@ -160,7 +160,8 @@ struct ceph_cap { 
			int issued;       /* latest, from the mds */

			int implemented;  /* implemented superset of

					     issued (for revocation) */

			int mds, mds_wanted;

			int mds;	  /* mds index for this cap */

			int mds_wanted;   /* caps wanted from this mds */

		};

		/* caps to release */

		struct {