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dump mem: Replace two bools with ctl struct

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This is to make it easier to extend this logic further.

Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
Acked-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
This commit is contained in:
Pavel Emelyanov 2016-09-19 14:17:45 +03:00
parent b149048812
commit 41c3ca8616
3 changed files with 25 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

10
criu/cr-dump.c
View file

@ -1109,6 +1109,7 @@ static int pre_dump_one_task(struct pstree_item *item)
struct parasite_ctl *parasite_ctl;
int ret = -1;
struct parasite_dump_misc misc;
struct mem_dump_ctl mdc;
INIT_LIST_HEAD(&vmas.h);
vmas.nr = 0;
@ -1158,7 +1159,9 @@ static int pre_dump_one_task(struct pstree_item *item)
parasite_ctl->pid.virt = item->pid.virt = misc.pid;
ret = parasite_dump_pages_seized(parasite_ctl, &vmas, true);
mdc.delayed_dump = true;
ret = parasite_dump_pages_seized(parasite_ctl, &vmas, &mdc);
if (ret)
goto err_cure;
@ -1185,6 +1188,7 @@ static int dump_one_task(struct pstree_item *item)
struct cr_imgset *cr_imgset = NULL;
struct parasite_drain_fd *dfds = NULL;
struct proc_posix_timers_stat proc_args;
struct mem_dump_ctl mdc;
INIT_LIST_HEAD(&vmas.h);
vmas.nr = 0;
@ -1314,7 +1318,9 @@ static int dump_one_task(struct pstree_item *item)
}
}
ret = parasite_dump_pages_seized(parasite_ctl, &vmas, false);
mdc.delayed_dump = false;
ret = parasite_dump_pages_seized(parasite_ctl, &vmas, &mdc);
if (ret)
goto err_cure;

6
criu/include/mem.h
View file

@ -10,13 +10,17 @@ struct vm_area_list;
struct page_pipe;
struct pstree_item;
struct mem_dump_ctl {
bool delayed_dump;
};
extern bool page_in_parent(bool dirty);
extern int prepare_mm_pid(struct pstree_item *i);
extern int do_task_reset_dirty_track(int pid);
extern unsigned int dump_pages_args_size(struct vm_area_list *vmas);
extern int parasite_dump_pages_seized(struct parasite_ctl *ctl,
struct vm_area_list *vma_area_list,
bool delayed_dump);
struct mem_dump_ctl *mdc);
#define PME_PRESENT (1ULL << 63)
#define PME_SWAP (1ULL << 62)

25
criu/mem.c
View file

@ -260,7 +260,7 @@ static int dump_pages(struct page_pipe *pp, struct parasite_ctl *ctl,
static int __parasite_dump_pages_seized(struct parasite_ctl *ctl,
struct parasite_dump_pages_args *args,
struct vm_area_list *vma_area_list,
bool delayed_dump)
struct mem_dump_ctl *mdc)
{
pmc_t pmc = PMC_INIT;
struct page_pipe *pp;
@ -290,14 +290,14 @@ static int __parasite_dump_pages_seized(struct parasite_ctl *ctl,
return -1;
ret = -1;
if (!delayed_dump)
if (!mdc->delayed_dump)
cpp_flags |= PP_CHUNK_MODE;
ctl->mem_pp = pp = create_page_pipe(vma_area_list->priv_size,
pargs_iovs(args), cpp_flags);
if (!pp)
goto out;
if (!delayed_dump) {
if (!mdc->delayed_dump) {
ret = open_page_xfer(&xfer, CR_FD_PAGEMAP, ctl->pid.virt);
if (ret < 0)
goto out_pp;
@ -323,7 +323,7 @@ static int __parasite_dump_pages_seized(struct parasite_ctl *ctl,
!vma_area_is(vma_area, VMA_ANON_SHARED))
continue;
if (vma_entry_is(vma_area->e, VMA_AREA_AIORING)) {
if (delayed_dump)
if (mdc->delayed_dump)
continue;
has_parent = false;
}
@ -338,7 +338,7 @@ again:
ret = generate_iovs(vma_area, pp, map, &off,
has_parent);
if (ret == -EAGAIN) {
BUG_ON(delayed_dump);
BUG_ON(mdc->delayed_dump);
ret = dump_pages(pp, ctl, args, &xfer);
if (!ret) {
@ -351,7 +351,7 @@ again:
goto out_xfer;
}
ret = dump_pages(pp, ctl, args, delayed_dump ? NULL : &xfer);
ret = dump_pages(pp, ctl, args, mdc->delayed_dump ? NULL : &xfer);
if (ret)
goto out_xfer;
@ -363,10 +363,10 @@ again:
ret = task_reset_dirty_track(ctl->pid.real);
out_xfer:
if (!delayed_dump)
if (!mdc->delayed_dump)
xfer.close(&xfer);
out_pp:
if (ret || !delayed_dump)
if (ret || !mdc->delayed_dump)
destroy_page_pipe(pp);
out:
pmc_fini(&pmc);
@ -375,12 +375,13 @@ out:
}
int parasite_dump_pages_seized(struct parasite_ctl *ctl,
struct vm_area_list *vma_area_list, bool delayed_dump)
struct vm_area_list *vma_area_list,
struct mem_dump_ctl *mdc)
{
int ret;
struct parasite_dump_pages_args *pargs;
pargs = prep_dump_pages_args(ctl, vma_area_list, delayed_dump);
pargs = prep_dump_pages_args(ctl, vma_area_list, mdc->delayed_dump);
/*
* Add PROT_READ protection for all VMAs we're about to
@ -402,9 +403,7 @@ int parasite_dump_pages_seized(struct parasite_ctl *ctl,
return -1;
}
ret = __parasite_dump_pages_seized(ctl, pargs, vma_area_list,
delayed_dump);
ret = __parasite_dump_pages_seized(ctl, pargs, vma_area_list, mdc);
if (ret) {
pr_err("Can't dump page with parasite\n");
/* Parasite will unprotect VMAs after fail in fini() */