xnu-517.3.15.tar.gz

[apple/xnu.git] / bsd / kern / ubc_subr.c

diff --git a/bsd/kern/ubc_subr.c b/bsd/kern/ubc_subr.c
index d5154c5d8b3061cc7c79e56ea45beb8818e6e183..5fb09e492a7ae470452963c338b056ed54a1004f 100644 (file)
--- a/bsd/kern/ubc_subr.c
+++ b/bsd/kern/ubc_subr.c
@@ -102,7 +102,7 @@ ubc_busy(struct vnode *vp)
 
        while (ISSET(uip->ui_flags, UI_BUSY)) {
 
-               if (uip->ui_owner == (void *)current_thread())
+               if (uip->ui_owner == (void *)current_act())
                        return (2);
 
                SET(uip->ui_flags, UI_WANTED);
@@ -111,7 +111,7 @@ ubc_busy(struct vnode *vp)
                if (!UBCINFOEXISTS(vp))
                        return (0);
        }
-       uip->ui_owner = (void *)current_thread();
+       uip->ui_owner = (void *)current_act();
 
        SET(uip->ui_flags, UI_BUSY);
 
@@ -321,7 +321,8 @@ ubc_setsize(struct vnode *vp, off_t nsize)
        memory_object_control_t control;
        kern_return_t kret;
 
-       assert(nsize >= (off_t)0);
+       if (nsize < (off_t)0)
+               return (0);
 
        if (UBCINVALID(vp))
                return (0);
@@ -750,7 +751,7 @@ ubc_clean(struct vnode *vp, int invalidate)
        control = uip->ui_control;
        assert(control);
 
-       vp->v_flag &= ~VHASDIRTY;
+       cluster_release(vp);
        vp->v_clen = 0;
 
        /* Write the dirty data in the file and discard cached pages */
@@ -857,9 +858,28 @@ ubc_hold(struct vnode *vp)
        int    recursed;
        memory_object_control_t object;
 
+retry:
+
        if (UBCINVALID(vp))
                return (0);
 
+       ubc_lock(vp);
+       if (ISSET(vp->v_flag,  VUINIT)) {
+               /*
+                * other thread is not done initializing this
+                * yet, wait till it's done and try again
+                */
+               while (ISSET(vp->v_flag,  VUINIT)) {
+                       SET(vp->v_flag, VUWANT); /* XXX overloaded! */
+                       ubc_unlock(vp);
+                       (void) tsleep((caddr_t)vp, PINOD, "ubchold", 0);
+                       ubc_lock(vp);
+               }
+               ubc_unlock(vp);
+               goto retry;
+       }
+       ubc_unlock(vp);
+
        if ((recursed = ubc_busy(vp)) == 0) {
                /* must be invalid or dying vnode */
                assert(UBCINVALID(vp) ||
@@ -975,6 +995,12 @@ ubc_release_named(struct vnode *vp)
                (uip->ui_refcount == 1) && !uip->ui_mapped) {
                control = uip->ui_control;
                assert(control);
+
+               // XXXdbg
+               if (vp->v_flag & VDELETED) {
+                   ubc_setsize(vp, (off_t)0);
+               }
+
                CLR(uip->ui_flags, UI_HASOBJREF);
                kret = memory_object_release_name(control,
                                MEMORY_OBJECT_RESPECT_CACHE);
@@ -1105,24 +1131,22 @@ ubc_invalidate(struct vnode *vp, off_t offset, size_t size)
  * Returns 1 if file is in use by UBC, 0 if not
  */
 int
-ubc_isinuse(struct vnode *vp, int tookref)
+ubc_isinuse(struct vnode *vp, int busycount)
 {
-       int busycount = tookref ? 2 : 1;
-
        if (!UBCINFOEXISTS(vp))
                return (0);
 
-       if (tookref == 0) {
+       if (busycount == 0) {
                printf("ubc_isinuse: called without a valid reference"
                    ": v_tag = %d\v", vp->v_tag);
                vprint("ubc_isinuse", vp);
                return (0);
        }
 
-       if (vp->v_usecount > busycount)
+       if (vp->v_usecount > busycount+1)
                return (1);
 
-       if ((vp->v_usecount == busycount)
+       if ((vp->v_usecount == busycount+1)
                && (vp->v_ubcinfo->ui_mapped == 1))
                return (1);
        else
@@ -1185,6 +1209,42 @@ ubc_page_op(
                                      flagsp));
 }
                                      
+__private_extern__ kern_return_t
+ubc_page_op_with_control(
+       memory_object_control_t  control,
+       off_t                    f_offset,
+       int                      ops,
+       ppnum_t                  *phys_entryp,
+       int                      *flagsp)
+{
+       return (memory_object_page_op(control,
+                                     (memory_object_offset_t)f_offset,
+                                     ops,
+                                     phys_entryp,
+                                     flagsp));
+}
+                                     
+kern_return_t
+ubc_range_op(
+       struct vnode    *vp,
+       off_t           f_offset_beg,
+       off_t           f_offset_end,
+       int             ops,
+       int             *range)
+{
+       memory_object_control_t         control;
+
+       control = ubc_getobject(vp, UBC_FLAGS_NONE);
+       if (control == MEMORY_OBJECT_CONTROL_NULL)
+               return KERN_INVALID_ARGUMENT;
+
+       return (memory_object_range_op(control,
+                                     (memory_object_offset_t)f_offset_beg,
+                                     (memory_object_offset_t)f_offset_end,
+                                     ops,
+                                     range));
+}
+                                     
 kern_return_t
 ubc_create_upl(
        struct vnode    *vp,
@@ -1213,7 +1273,11 @@ ubc_create_upl(
        if (control == MEMORY_OBJECT_CONTROL_NULL)
                return KERN_INVALID_ARGUMENT;
 
-       uplflags |= (UPL_NO_SYNC|UPL_CLEAN_IN_PLACE|UPL_SET_INTERNAL);
+       if (uplflags & UPL_WILL_BE_DUMPED) {
+               uplflags &= ~UPL_WILL_BE_DUMPED;
+               uplflags |= (UPL_NO_SYNC|UPL_SET_INTERNAL);
+       } else
+               uplflags |= (UPL_NO_SYNC|UPL_CLEAN_IN_PLACE|UPL_SET_INTERNAL);
        count = 0;
        kr = memory_object_upl_request(control, f_offset, bufsize,
                                                                   uplp, NULL, &count, uplflags);