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Commit 222b7f90 authored by Yan, Zheng's avatar Yan, Zheng Committed by Ilya Dryomov
Browse files

ceph: voluntarily drop Ax cap for requests that create new inode 



MDS need to rdlock directory inode's authlock when handling these
requests. Voluntarily dropping CEPH_CAP_AUTH_EXCL avoids a cap revoke
message.

Signed-off-by: default avatar"Yan, Zheng" <zyan@redhat.com>
Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
parent e573427a

fs/ceph/caps.c

+15 −6
Original line number Diff line number Diff line
@@ -3939,11 +3939,20 @@ int ceph_encode_inode_release(void **p, struct inode *inode, 


	cap = __get_cap_for_mds(ci, mds);

	if (cap && __cap_is_valid(cap)) {

		if (force ||

		    ((cap->issued & drop) &&

		     (cap->issued & unless) == 0)) {

			if ((cap->issued & drop) &&

			    (cap->issued & unless) == 0) {

		unless &= cap->issued;

		if (unless) {

			if (unless & CEPH_CAP_AUTH_EXCL)

				drop &= ~CEPH_CAP_AUTH_SHARED;

			if (unless & CEPH_CAP_LINK_EXCL)

				drop &= ~CEPH_CAP_LINK_SHARED;

			if (unless & CEPH_CAP_XATTR_EXCL)

				drop &= ~CEPH_CAP_XATTR_SHARED;

			if (unless & CEPH_CAP_FILE_EXCL)

				drop &= ~CEPH_CAP_FILE_SHARED;

		}



		if (force || (cap->issued & drop)) {

			if (cap->issued & drop) {

				int wanted = __ceph_caps_wanted(ci);

				if ((ci->i_ceph_flags & CEPH_I_NODELAY) == 0)

					wanted |= cap->mds_wanted;
@@ -3975,7 +3984,7 @@ int ceph_encode_inode_release(void **p, struct inode *inode, 
			*p += sizeof(*rel);

			ret = 1;

		} else {

			dout("encode_inode_release %p cap %p %s\n",

			dout("encode_inode_release %p cap %p %s (noop)\n",

			     inode, cap, ceph_cap_string(cap->issued));

		}

	}

fs/ceph/dir.c

+3 −3
Original line number Diff line number Diff line
@@ -835,7 +835,7 @@ static int ceph_mknod(struct inode *dir, struct dentry *dentry, 
	set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags);

	req->r_args.mknod.mode = cpu_to_le32(mode);

	req->r_args.mknod.rdev = cpu_to_le32(rdev);

	req->r_dentry_drop = CEPH_CAP_FILE_SHARED;

	req->r_dentry_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_AUTH_EXCL;

	req->r_dentry_unless = CEPH_CAP_FILE_EXCL;

	if (acls.pagelist) {

		req->r_pagelist = acls.pagelist;
@@ -887,7 +887,7 @@ static int ceph_symlink(struct inode *dir, struct dentry *dentry, 
	set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags);

	req->r_dentry = dget(dentry);

	req->r_num_caps = 2;

	req->r_dentry_drop = CEPH_CAP_FILE_SHARED;

	req->r_dentry_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_AUTH_EXCL;

	req->r_dentry_unless = CEPH_CAP_FILE_EXCL;

	err = ceph_mdsc_do_request(mdsc, dir, req);

	if (!err && !req->r_reply_info.head->is_dentry)
@@ -936,7 +936,7 @@ static int ceph_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 
	req->r_parent = dir;

	set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags);

	req->r_args.mkdir.mode = cpu_to_le32(mode);

	req->r_dentry_drop = CEPH_CAP_FILE_SHARED;

	req->r_dentry_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_AUTH_EXCL;

	req->r_dentry_unless = CEPH_CAP_FILE_EXCL;

	if (acls.pagelist) {

		req->r_pagelist = acls.pagelist;

fs/ceph/file.c

+1 −1
Original line number Diff line number Diff line
@@ -396,7 +396,7 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry, 
	req->r_dentry = dget(dentry);

	req->r_num_caps = 2;

	if (flags & O_CREAT) {

		req->r_dentry_drop = CEPH_CAP_FILE_SHARED;

		req->r_dentry_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_AUTH_EXCL;

		req->r_dentry_unless = CEPH_CAP_FILE_EXCL;

		if (acls.pagelist) {

			req->r_pagelist = acls.pagelist;