cc: lkml
Sukadev Bhattiprolu [sukadev@xxxxxxxxxxxxxxxxxx] wrote:
|
| Subject: [v12][PATCH 7/9] Define do_fork_with_pids()
|
| do_fork_with_pids() is same as do_fork(), except that it takes an
| additional, 'pid_set', parameter. This parameter, currently unused,
| specifies the set of target pids of the process in each of its pid
| namespaces.
|
| Changelog[v7]:
| - Drop 'struct pid_set' object and pass in 'pid_t *target_pids'
| instead of 'struct pid_set *'.
|
| Changelog[v6]:
| - (Nathan Lynch, Arnd Bergmann, H. Peter Anvin, Linus Torvalds)
| Change 'pid_set.pids' to a 'pid_t pids[]' so size of 'struct pid_set'
| is constant across architectures.
| - (Nathan Lynch) Change 'pid_set.num_pids' to 'unsigned int'.
|
| Changelog[v4]:
| - Rename 'struct target_pid_set' to 'struct pid_set' since it may
| be useful in other contexts.
|
| Changelog[v3]:
| - Fix "long-line" warning from checkpatch.pl
|
| Changelog[v2]:
| - To facilitate moving architecture-inpdendent code to kernel/fork.c
| pass in 'struct target_pid_set __user *' to do_fork_with_pids()
| rather than 'pid_t *' (next patch moves the arch-independent
| code to kernel/fork.c)
|
| Signed-off-by: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx>
| Acked-by: Serge Hallyn <serue@xxxxxxxxxx>
| Reviewed-by: Oren Laadan <orenl@xxxxxxxxxxxxxxx>
| ---
| include/linux/sched.h | 3 +++
| kernel/fork.c | 17 +++++++++++++++--
| 2 files changed, 18 insertions(+), 2 deletions(-)
|
| diff --git a/include/linux/sched.h b/include/linux/sched.h
| index a4d2c23..85e971a 100644
| --- a/include/linux/sched.h
| +++ b/include/linux/sched.h
| @@ -2153,6 +2153,9 @@ extern int disallow_signal(int);
|
| extern int do_execve(char *, char __user * __user *, char __user * __user *, struct pt_regs *);
| extern long do_fork(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *);
| +extern long do_fork_with_pids(unsigned long, unsigned long, struct pt_regs *,
| + unsigned long, int __user *, int __user *,
| + unsigned int, pid_t __user *);
| struct task_struct *fork_idle(int);
|
| extern void set_task_comm(struct task_struct *tsk, char *from);
| diff --git a/kernel/fork.c b/kernel/fork.c
| index 11f77ed..210e841 100644
| --- a/kernel/fork.c
| +++ b/kernel/fork.c
| @@ -1377,12 +1377,14 @@ struct task_struct * __cpuinit fork_idle(int cpu)
| * It copies the process, and if successful kick-starts
| * it and waits for it to finish using the VM if required.
| */
| -long do_fork(unsigned long clone_flags,
| +long do_fork_with_pids(unsigned long clone_flags,
| unsigned long stack_start,
| struct pt_regs *regs,
| unsigned long stack_size,
| int __user *parent_tidptr,
| - int __user *child_tidptr)
| + int __user *child_tidptr,
| + unsigned int num_pids,
| + pid_t __user *upids)
| {
| struct task_struct *p;
| int trace = 0;
| @@ -1485,6 +1487,17 @@ long do_fork(unsigned long clone_flags,
| return nr;
| }
|
| +long do_fork(unsigned long clone_flags,
| + unsigned long stack_start,
| + struct pt_regs *regs,
| + unsigned long stack_size,
| + int __user *parent_tidptr,
| + int __user *child_tidptr)
| +{
| + return do_fork_with_pids(clone_flags, stack_start, regs, stack_size,
| + parent_tidptr, child_tidptr, 0, NULL);
| +}
| +
| #ifndef ARCH_MIN_MMSTRUCT_ALIGN
| #define ARCH_MIN_MMSTRUCT_ALIGN 0
| #endif
| --
| 1.6.0.4
|
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