ceph: voluntarily drop Lx cap for link/rename requests
MDS need to xlock inode's linklock when handling link/rename requests. Voluntarily dropping CEPH_CAP_AUTH_EXCL avoids a cap revoke message. Signed-off-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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222b7f90ba
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@ -983,7 +983,7 @@ static int ceph_link(struct dentry *old_dentry, struct inode *dir,
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req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
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req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
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/* release LINK_SHARED on source inode (mds will lock it) */
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req->r_old_inode_drop = CEPH_CAP_LINK_SHARED;
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req->r_old_inode_drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL;
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err = ceph_mdsc_do_request(mdsc, dir, req);
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if (err) {
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d_drop(dentry);
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@ -1096,7 +1096,7 @@ static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry,
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req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
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req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
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/* release LINK_RDCACHE on source inode (mds will lock it) */
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req->r_old_inode_drop = CEPH_CAP_LINK_SHARED;
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req->r_old_inode_drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL;
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if (d_really_is_positive(new_dentry))
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req->r_inode_drop = drop_caps_for_unlink(d_inode(new_dentry));
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err = ceph_mdsc_do_request(mdsc, old_dir, req);
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