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proc_parse: parse fdinfo to get pos and flags

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We are going to parse fdinfo for getting mnt_id,
so we can take there pos and flags and don't call
fcntl and lseek for that.

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Andrey Vagin
2014-04-09 03:34:53 +04:00
committed by Pavel Emelyanov
parent d36e07aabe
commit 8bcffef6b9
3 changed files with 33 additions and 8 deletions
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14
files.c
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@@ -34,6 +34,7 @@
#include "tun.h"
#include "fdset.h"
#include "fs-magic.h"
#include "proc_parse.h"
#include "parasite.h"
#include "parasite-syscall.h"
@@ -204,6 +205,7 @@ static int fill_fd_params(struct parasite_ctl *ctl, int fd, int lfd,
{
int ret;
struct statfs fsbuf;
struct fdinfo_common fdinfo;
if (fstat(lfd, &p->stat) < 0) {
pr_perror("Can't stat fd %d", lfd);
@@ -215,16 +217,14 @@ static int fill_fd_params(struct parasite_ctl *ctl, int fd, int lfd,
return -1;
}
if (parse_fdinfo(lfd, FD_TYPES__UND, NULL, &fdinfo))
return -1;
p->fs_type = fsbuf.f_type;
p->ctl = ctl;
p->fd = fd;
p->pos = lseek(lfd, 0, SEEK_CUR);
ret = fcntl(lfd, F_GETFL);
if (ret == -1) {
pr_perror("Unable to get fd %d flags", lfd);
return -1;
}
p->flags = ret;
p->pos = fdinfo.pos;
p->flags = fdinfo.flags;
p->pid = ctl->pid.real;
p->fd_flags = opts->flags;