int
msdosfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred)
{
struct vnode *vp;
struct vnode_iterator *marker;
struct denode *dep;
struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
int error, allerror = 0;
/*
* If we ever switch to not updating all of the FATs all the time,
* this would be the place to update them from the first one.
*/
if (pmp->pm_fmod != 0) {
if (pmp->pm_flags & MSDOSFSMNT_RONLY)
panic("msdosfs_sync: rofs mod");
else {
/* update FATs here */
}
}
fstrans_start(mp, FSTRANS_SHARED);
/*
* Write back each (modified) denode.
*/
vfs_vnode_iterator_init(mp, &marker);
while (vfs_vnode_iterator_next(marker, &vp)) {
error = vn_lock(vp, LK_EXCLUSIVE);
if (error) {
vrele(vp);
continue;
}
dep = VTODE(vp);
if (waitfor == MNT_LAZY || vp->v_type == VNON ||
dep == NULL || (((dep->de_flag &
(DE_ACCESS | DE_CREATE | DE_UPDATE | DE_MODIFIED)) == 0) &&
(LIST_EMPTY(&vp->v_dirtyblkhd) &&
UVM_OBJ_IS_CLEAN(&vp->v_uobj)))) {
vput(vp);
continue;
}
if ((error = VOP_FSYNC(vp, cred,
waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0)) != 0)
allerror = error;
vput(vp);
}
vfs_vnode_iterator_destroy(marker);
/*
* Force stale file system control information to be flushed.
*/
if ((error = VOP_FSYNC(pmp->pm_devvp, cred,
waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0)) != 0)
allerror = error;
fstrans_done(mp);
return (allerror);
}
static bool
ext2fs_sync_selector(void *cl, struct vnode *vp)
{
struct inode *ip;
ip = VTOI(vp);
/*
* Skip the vnode/inode if inaccessible.
*/
if (ip == NULL || vp->v_type == VNON)
return false;
if (((ip->i_flag &
(IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 &&
LIST_EMPTY(&vp->v_dirtyblkhd) &&
UVM_OBJ_IS_CLEAN(&vp->v_uobj)))
return false;
return true;
}
static bool
ext2fs_sync_selector(void *cl, struct vnode *vp)
{
// printf("In file: %s, fun: %s,lineno: %d\n",__FILE__, __func__, __LINE__);
struct inode *ip;
ip = VTOI(vp);
/*
* Skip the vnode/inode if inaccessible.
*/
if (ip == NULL || vp->v_type == VNON)
return false;
if (((ip->i_flag &
(IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 &&
LIST_EMPTY(&vp->v_dirtyblkhd) &&
UVM_OBJ_IS_CLEAN(&vp->v_uobj)))
return false;
return true;
}
/*
* uvm_loanbreak: break loan on a uobj page
*
* => called with uobj locked
* => the page should be busy
* => return value:
* newly allocated page if succeeded
*/
struct vm_page *
uvm_loanbreak(struct vm_page *uobjpage)
{
struct vm_page *pg;
#ifdef DIAGNOSTIC
struct uvm_object *uobj = uobjpage->uobject;
#endif
KASSERT(uobj != NULL);
KASSERT(mutex_owned(&uobj->vmobjlock));
KASSERT(uobjpage->flags & PG_BUSY);
/* alloc new un-owned page */
pg = uvm_pagealloc(NULL, 0, NULL, 0);
if (pg == NULL)
return NULL;
/*
* copy the data from the old page to the new
* one and clear the fake flags on the new page (keep it busy).
* force a reload of the old page by clearing it from all
* pmaps.
* transfer dirtiness of the old page to the new page.
* then lock the page queues to rename the pages.
*/
uvm_pagecopy(uobjpage, pg); /* old -> new */
pg->flags &= ~PG_FAKE;
pmap_page_protect(uobjpage, VM_PROT_NONE);
if ((uobjpage->flags & PG_CLEAN) != 0 && !pmap_clear_modify(uobjpage)) {
pmap_clear_modify(pg);
pg->flags |= PG_CLEAN;
} else {
/* uvm_pagecopy marked it dirty */
KASSERT((pg->flags & PG_CLEAN) == 0);
/* a object with a dirty page should be dirty. */
KASSERT(!UVM_OBJ_IS_CLEAN(uobj));
}
if (uobjpage->flags & PG_WANTED)
wakeup(uobjpage);
/* uobj still locked */
uobjpage->flags &= ~(PG_WANTED|PG_BUSY);
UVM_PAGE_OWN(uobjpage, NULL);
mutex_enter(&uvm_pageqlock);
/*
* replace uobjpage with new page.
*/
uvm_pagereplace(uobjpage, pg);
/*
* if the page is no longer referenced by
* an anon (i.e. we are breaking an O->K
* loan), then remove it from any pageq's.
*/
if (uobjpage->uanon == NULL)
uvm_pagedequeue(uobjpage);
/*
* at this point we have absolutely no
* control over uobjpage
*/
/* install new page */
uvm_pageactivate(pg);
mutex_exit(&uvm_pageqlock);
/*
* done! loan is broken and "pg" is
* PG_BUSY. it can now replace uobjpage.
*/
return pg;
}
int
msdosfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred)
{
struct vnode *vp, *mvp;
struct denode *dep;
struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
int error, allerror = 0;
/*
* If we ever switch to not updating all of the FATs all the time,
* this would be the place to update them from the first one.
*/
if (pmp->pm_fmod != 0) {
if (pmp->pm_flags & MSDOSFSMNT_RONLY)
panic("msdosfs_sync: rofs mod");
else {
/* update FATs here */
}
}
/* Allocate a marker vnode. */
mvp = vnalloc(mp);
fstrans_start(mp, FSTRANS_SHARED);
/*
* Write back each (modified) denode.
*/
mutex_enter(&mntvnode_lock);
loop:
for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = vunmark(mvp)) {
vmark(mvp, vp);
if (vp->v_mount != mp || vismarker(vp))
continue;
mutex_enter(vp->v_interlock);
dep = VTODE(vp);
if (waitfor == MNT_LAZY || vp->v_type == VNON ||
dep == NULL || (((dep->de_flag &
(DE_ACCESS | DE_CREATE | DE_UPDATE | DE_MODIFIED)) == 0) &&
(LIST_EMPTY(&vp->v_dirtyblkhd) &&
UVM_OBJ_IS_CLEAN(&vp->v_uobj)))) {
mutex_exit(vp->v_interlock);
continue;
}
mutex_exit(&mntvnode_lock);
error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT);
if (error) {
mutex_enter(&mntvnode_lock);
if (error == ENOENT) {
(void)vunmark(mvp);
goto loop;
}
continue;
}
if ((error = VOP_FSYNC(vp, cred,
waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0)) != 0)
allerror = error;
vput(vp);
mutex_enter(&mntvnode_lock);
}
mutex_exit(&mntvnode_lock);
vnfree(mvp);
/*
* Force stale file system control information to be flushed.
*/
if ((error = VOP_FSYNC(pmp->pm_devvp, cred,
waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0)) != 0)
allerror = error;
fstrans_done(mp);
return (allerror);
}
/*
* Go through the disk queues to initiate sandbagged IO;
* go through the inodes to write those that have been modified;
* initiate the writing of the super block if it has been modified.
*
* Note: we are always called with the filesystem marked `MPBUSY'.
*/
int
ext2fs_sync(struct mount *mp, int waitfor, kauth_cred_t cred)
{
struct vnode *vp, *mvp;
struct inode *ip;
struct ufsmount *ump = VFSTOUFS(mp);
struct m_ext2fs *fs;
int error, allerror = 0;
fs = ump->um_e2fs;
if (fs->e2fs_fmod != 0 && fs->e2fs_ronly != 0) { /* XXX */
printf("fs = %s\n", fs->e2fs_fsmnt);
panic("update: rofs mod");
}
/* Allocate a marker vnode. */
mvp = vnalloc(mp);
/*
* Write back each (modified) inode.
*/
mutex_enter(&mntvnode_lock);
loop:
/*
* NOTE: not using the TAILQ_FOREACH here since in this loop vgone()
* and vclean() can be called indirectly
*/
for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = vunmark(mvp)) {
vmark(mvp, vp);
if (vp->v_mount != mp || vismarker(vp))
continue;
mutex_enter(vp->v_interlock);
ip = VTOI(vp);
if (ip == NULL || (vp->v_iflag & (VI_XLOCK|VI_CLEAN)) != 0 ||
vp->v_type == VNON ||
((ip->i_flag &
(IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 &&
LIST_EMPTY(&vp->v_dirtyblkhd) &&
UVM_OBJ_IS_CLEAN(&vp->v_uobj)))
{
mutex_exit(vp->v_interlock);
continue;
}
mutex_exit(&mntvnode_lock);
error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT);
if (error) {
mutex_enter(&mntvnode_lock);
if (error == ENOENT) {
mutex_enter(&mntvnode_lock);
(void)vunmark(mvp);
goto loop;
}
continue;
}
if (vp->v_type == VREG && waitfor == MNT_LAZY)
error = ext2fs_update(vp, NULL, NULL, 0);
else
error = VOP_FSYNC(vp, cred,
waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0);
if (error)
allerror = error;
vput(vp);
mutex_enter(&mntvnode_lock);
}
mutex_exit(&mntvnode_lock);
vnfree(mvp);
/*
* Force stale file system control information to be flushed.
*/
if (waitfor != MNT_LAZY) {
vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
if ((error = VOP_FSYNC(ump->um_devvp, cred,
waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0)) != 0)
allerror = error;
VOP_UNLOCK(ump->um_devvp);
}
/*
* Write back modified superblock.
*/
if (fs->e2fs_fmod != 0) {
fs->e2fs_fmod = 0;
fs->e2fs.e2fs_wtime = time_second;
if ((error = ext2fs_cgupdate(ump, waitfor)))
allerror = error;
}
return (allerror);
}
