mirror of
https://github.com/checkpoint-restore/criu
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447388d79b
This patch tries to introduce lazy and hidden pid_dir support, meaning one don't have to worry about pid_dir but the optimization is still there. The patch relies on the fact that we work with many /proc/pid files for one pid, then for another pid and so on, i.e. not in a random manner. The idea is when we call open_proc() with a new pid for the first time, the appropriate /proc/PID directory is opened and its fd is stored. Next call to open_proc() with the same PID only need to check that the PID is not changed. In case PID is changed, we close the old one and open/store a new one. Now the code using open_proc() and friends: - does not need to carry proc_pid around, pid is enough - does not need to call open_pid_proc() The only thing that can't be done in that "lazy" mode is closing the last PID fd, thus close_pid_proc(). Signed-off-by: Kir Kolyshkin <kir@openvz.org> Acked-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
#ifndef PROC_PARSE_H__
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#define PROC_PARSE_H__
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#define PROC_TASK_COMM_LEN 32
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#define PROC_TASK_COMM_LEN_FMT "(%31s"
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struct proc_pid_stat_small {
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int pid;
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char comm[PROC_TASK_COMM_LEN];
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char state;
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};
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struct proc_pid_stat {
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int pid;
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char comm[PROC_TASK_COMM_LEN];
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char state;
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int ppid;
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int pgid;
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int sid;
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int tty_nr;
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int tty_pgrp;
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unsigned int flags;
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unsigned long min_flt;
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unsigned long cmin_flt;
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unsigned long maj_flt;
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unsigned long cmaj_flt;
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unsigned long utime;
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unsigned long stime;
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long cutime;
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long cstime;
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long priority;
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long nice;
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int num_threads;
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int zero0;
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unsigned long long start_time;
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unsigned long vsize;
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long mm_rss;
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unsigned long rsslim;
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unsigned long start_code;
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unsigned long end_code;
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unsigned long start_stack;
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unsigned long esp;
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unsigned long eip;
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unsigned long sig_pending;
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unsigned long sig_blocked;
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unsigned long sig_ignored;
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unsigned long sig_handled;
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unsigned long wchan;
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unsigned long zero1;
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unsigned long zero2;
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int exit_signal;
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int task_cpu;
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unsigned int rt_priority;
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unsigned int policy;
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unsigned long long delayacct_blkio_ticks;
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unsigned long gtime;
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long cgtime;
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unsigned long start_data;
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unsigned long end_data;
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unsigned long start_brk;
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unsigned long arg_start;
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unsigned long arg_end;
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unsigned long env_start;
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unsigned long env_end;
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int exit_code;
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};
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#define PROC_CAP_SIZE 2
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struct proc_status_creds {
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unsigned int uids[4];
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unsigned int gids[4];
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unsigned int cap_inh[PROC_CAP_SIZE];
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unsigned int cap_prm[PROC_CAP_SIZE];
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unsigned int cap_eff[PROC_CAP_SIZE];
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unsigned int cap_bnd[PROC_CAP_SIZE];
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};
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extern int parse_pid_stat(pid_t pid, struct proc_pid_stat *s);
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extern int parse_pid_stat_small(pid_t pid, struct proc_pid_stat_small *s);
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extern int parse_maps(pid_t pid, struct list_head *vma_area_list, bool use_map_files);
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extern int parse_pid_status(pid_t pid, struct proc_status_creds *);
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#endif /* PROC_PARSE_H__ */
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