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f13ec96e58
Currently each task subtracts number of zombies from task_entries->nr_threads without locks, so if two tasks will do this operation concurrently, the result may be unpredictable. https://github.com/xemul/criu/issues/13 Cc: Tycho Andersen <tycho.andersen@canonical.com> Signed-off-by: Andrew Vagin <avagin@openvz.org> Acked-by: Tycho Andersen <tycho.andersen@canonical.com> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
71 lines
1.3 KiB
C
71 lines
1.3 KiB
C
#ifndef __CR_RST_INFO_H__
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#define __CR_RST_INFO_H__
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#include "lock.h"
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#include "list.h"
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#include "vma.h"
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struct task_entries {
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int nr_threads, nr_tasks, nr_helpers;
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atomic_t nr_zombies;
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futex_t nr_in_progress;
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futex_t start;
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atomic_t cr_err;
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mutex_t userns_sync_lock;
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};
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struct fdt {
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int nr; /* How many tasks share this fd table */
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pid_t pid; /* Who should restore this fd table */
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/*
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* The fd table is ready for restoing, if fdt_lock is equal to nr
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* The fdt table was restrored, if fdt_lock is equal to nr + 1
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*/
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futex_t fdt_lock;
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};
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struct _MmEntry;
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struct rst_info {
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struct list_head fds;
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struct list_head eventpoll;
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struct list_head tty_slaves;
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struct list_head tty_ctty;
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void *premmapped_addr;
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unsigned long premmapped_len;
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unsigned long clone_flags;
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void *munmap_restorer;
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int nr_zombies;
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int service_fd_id;
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struct fdt *fdt;
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struct vm_area_list vmas;
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struct _MmEntry *mm;
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u32 cg_set;
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union {
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struct pstree_item *pgrp_leader;
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futex_t pgrp_set;
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};
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struct file_desc *cwd;
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struct file_desc *root;
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bool has_umask;
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u32 umask;
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/*
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* We set this flag when process has seccomp filters
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* so that we know to suspend them before we unmap the
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* restorer blob.
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*/
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bool has_seccomp;
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void *breakpoint;
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};
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#endif /* __CR_RST_INFO_H__ */
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