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unix: Don't drop whole socket with unlinked path

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When we can't stat socket name with ENOENT errno this
means, that the socket is bound and unlinked. Don't
drop the whole socket info, just treat it as nameless.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Pavel Emelyanov 2014-01-29 15:43:11 +04:00
parent 41a1b2da32
commit 261fdce39d
1 changed files with 14 additions and 5 deletions
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19
sk-unix.c
View file

@ -402,6 +402,7 @@ static int unix_collect_one(const struct unix_diag_msg *m,
struct unix_diag_vfs *uv;
struct stat st;
char rpath[PATH_MAX];
bool drop_path = false;
if (name[0] != '/') {
pr_warn("Relative bind path '%s' "
@ -418,12 +419,16 @@ static int unix_collect_one(const struct unix_diag_msg *m,
uv = RTA_DATA(tb[UNIX_DIAG_VFS]);
snprintf(rpath, sizeof(rpath), ".%s", name);
if (fstatat(mntns_root, rpath, &st, 0)) {
pr_warn("Can't stat socket %#x(%s), skipping: %m (err %d)\n",
m->udiag_ino, rpath, errno);
goto skip;
}
if (errno != ENOENT) {
pr_warn("Can't stat socket %#x(%s), skipping: %m (err %d)\n",
m->udiag_ino, rpath, errno);
goto skip;
}
if ((st.st_ino != uv->udiag_vfs_ino) ||
pr_info("unix: Dropping path %s for unlinked sk %#x\n",
name, m->udiag_ino);
drop_path = true;
} else if ((st.st_ino != uv->udiag_vfs_ino) ||
!phys_stat_dev_match(st.st_dev, uv->udiag_vfs_dev, name)) {
pr_info("unix: Dropping path %s for "
"unlinked bound "
@ -433,6 +438,10 @@ static int unix_collect_one(const struct unix_diag_msg *m,
(int)st.st_ino,
(int)uv->udiag_vfs_dev,
(int)uv->udiag_vfs_ino);
drop_path = true;
}
if (drop_path) {
/*
* When a socket is bound to unlinked file, we
* just drop his name, since no one will access