Add KTR_VFS traces to track modifications to a vnode's writecount.
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44ad547522
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b47f624183
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=232701
@ -952,6 +952,8 @@ unionfs_vn_create_on_upper(struct vnode **vpp, struct vnode *udvp,
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goto unionfs_vn_create_on_upper_free_out1;
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}
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vp->v_writecount++;
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CTR3(KTR_VFS, "%s: vp %p v_writecount increased to %d", __func__, vp,
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vp->v_writecount);
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*vpp = vp;
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unionfs_vn_create_on_upper_free_out1:
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@ -1087,6 +1089,8 @@ unionfs_copyfile(struct unionfs_node *unp, int docopy, struct ucred *cred,
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}
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VOP_CLOSE(uvp, FWRITE, cred, td);
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uvp->v_writecount--;
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CTR3(KTR_VFS, "%s: vp %p v_writecount decreased to %d", __func__, uvp,
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uvp->v_writecount);
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vn_finished_write(mp);
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@ -4591,16 +4591,22 @@ sys_fhopen(td, uap)
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if (error)
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goto bad;
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if (fmode & FWRITE)
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if (fmode & FWRITE) {
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vp->v_writecount++;
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CTR3(KTR_VFS, "%s: vp %p v_writecount increased to %d",
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__func__, vp, vp->v_writecount);
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}
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/*
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* end of vn_open code
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*/
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if ((error = falloc(td, &nfp, &indx, fmode)) != 0) {
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if (fmode & FWRITE)
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if (fmode & FWRITE) {
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vp->v_writecount--;
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CTR3(KTR_VFS, "%s: vp %p v_writecount decreased to %d",
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__func__, vp, vp->v_writecount);
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}
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goto bad;
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}
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/* An extra reference on `nfp' has been held for us by falloc(). */
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@ -245,8 +245,11 @@ vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, u_int vn_open_flags,
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if ((error = VOP_OPEN(vp, fmode, cred, td, fp)) != 0)
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goto bad;
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if (fmode & FWRITE)
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if (fmode & FWRITE) {
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vp->v_writecount++;
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CTR3(KTR_VFS, "%s: vp %p v_writecount increased to %d",
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__func__, vp, vp->v_writecount);
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}
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*flagp = fmode;
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ASSERT_VOP_LOCKED(vp, "vn_open_cred");
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if (!mpsafe)
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@ -309,6 +312,8 @@ vn_close(vp, flags, file_cred, td)
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VNASSERT(vp->v_writecount > 0, vp,
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("vn_close: negative writecount"));
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vp->v_writecount--;
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CTR3(KTR_VFS, "%s: vp %p v_writecount decreased to %d",
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__func__, vp, vp->v_writecount);
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}
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error = VOP_CLOSE(vp, flags, file_cred, td);
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vput(vp);
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@ -335,6 +335,8 @@ ufs_extattr_enable_with_open(struct ufsmount *ump, struct vnode *vp,
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}
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vp->v_writecount++;
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CTR3(KTR_VFS, "%s: vp %p v_writecount increased to %d", __func__, vp,
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vp->v_writecount);
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vref(vp);
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@ -272,6 +272,8 @@ vnode_pager_dealloc(object)
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if (object->un_pager.vnp.writemappings > 0) {
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object->un_pager.vnp.writemappings = 0;
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vp->v_writecount--;
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CTR3(KTR_VFS, "%s: vp %p v_writecount decreased to %d",
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__func__, vp, vp->v_writecount);
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}
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vp->v_object = NULL;
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vp->v_vflag &= ~VV_TEXT;
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@ -1241,9 +1243,13 @@ vnode_pager_update_writecount(vm_object_t object, vm_offset_t start,
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if (old_wm == 0 && object->un_pager.vnp.writemappings != 0) {
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ASSERT_VOP_ELOCKED(vp, "v_writecount inc");
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vp->v_writecount++;
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CTR3(KTR_VFS, "%s: vp %p v_writecount increased to %d",
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__func__, vp, vp->v_writecount);
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} else if (old_wm != 0 && object->un_pager.vnp.writemappings == 0) {
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ASSERT_VOP_ELOCKED(vp, "v_writecount dec");
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vp->v_writecount--;
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CTR3(KTR_VFS, "%s: vp %p v_writecount decreased to %d",
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__func__, vp, vp->v_writecount);
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}
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VM_OBJECT_UNLOCK(object);
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}
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