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proc_parse: parse mnt_id from /proc/PID/fdinfo/FD

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It will be used for restoring files from proper mounts.

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 03:34:54 +04:00
committed by Pavel Emelyanov
parent 8bcffef6b9
commit bed13a58ec
3 changed files with 6 additions and 2 deletions
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2
files.c
View File

@@ -205,7 +205,7 @@ static int fill_fd_params(struct parasite_ctl *ctl, int fd, int lfd,
{ {
int ret; int ret;
struct statfs fsbuf; struct statfs fsbuf;
struct fdinfo_common fdinfo; struct fdinfo_common fdinfo = { .mnt_id = -1 };
if (fstat(lfd, &p->stat) < 0) { if (fstat(lfd, &p->stat) < 0) {
pr_perror("Can't stat fd %d", lfd); pr_perror("Can't stat fd %d", lfd);

1
include/proc_parse.h
View File

@@ -156,6 +156,7 @@ union fdinfo_entries {
struct fdinfo_common { struct fdinfo_common {
off64_t pos; off64_t pos;
int flags; int flags;
int mnt_id;
}; };
extern int parse_fdinfo(int fd, int type, extern int parse_fdinfo(int fd, int type,

5
proc_parse.c
View File

@@ -1021,7 +1021,8 @@ static int parse_fdinfo_pid_s(char *pid, int fd, int type,
union fdinfo_entries entry; union fdinfo_entries entry;
if (fdinfo_field(str, "pos") || if (fdinfo_field(str, "pos") ||
fdinfo_field(str, "flags")) { fdinfo_field(str, "flags") ||
fdinfo_field(str, "mnt_id")) {
unsigned long long val; unsigned long long val;
struct fdinfo_common *fdinfo = arg; struct fdinfo_common *fdinfo = arg;
@@ -1035,6 +1036,8 @@ static int parse_fdinfo_pid_s(char *pid, int fd, int type,
fdinfo->pos = val; fdinfo->pos = val;
else if (fdinfo_field(str, "flags")) else if (fdinfo_field(str, "flags"))
fdinfo->flags = val; fdinfo->flags = val;
else if (fdinfo_field(str, "mnt_id"))
fdinfo->mnt_id = val;
entry_met = true; entry_met = true;
continue; continue;