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Code Issues Releases Activity

In m_align() add assertions that mbuf is virgin, similar to assertions

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in M_ALIGN(), MH_ALIGN, MEXT_ALIGN() macros.
This commit is contained in:
Gleb Smirnoff 2013-03-17 07:41:14 +00:00
parent 23909ac90d
commit 4f67e14304
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=248418
1 changed files with 12 additions and 4 deletions
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16
sys/kern/uipc_mbuf.c
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@ -395,7 +395,7 @@ m_demote(struct mbuf *m0, int all)
m_freem(m->m_nextpkt);
m->m_nextpkt = NULL;
}
m->m_flags = m->m_flags & (M_EXT|M_RDONLY|M_FREELIST|M_NOFREE);
m->m_flags = m->m_flags & (M_EXT|M_RDONLY|M_NOFREE);
}
}
@ -1877,14 +1877,22 @@ m_mbuftouio(struct uio *uio, struct mbuf *m, int len)
void
m_align(struct mbuf *m, int len)
{
#ifdef INVARIANTS
const char *msg = "%s: not a virgin mbuf";
#endif
int adjust;
if (m->m_flags & M_EXT)
if (m->m_flags & M_EXT) {
KASSERT(m->m_data == m->m_ext.ext_buf, (msg, __func__));
adjust = m->m_ext.ext_size - len;
else if (m->m_flags & M_PKTHDR)
} else if (m->m_flags & M_PKTHDR) {
KASSERT(m->m_data == m->m_pktdat, (msg, __func__));
adjust = MHLEN - len;
else
} else {
KASSERT(m->m_data == m->m_dat, (msg, __func__));
adjust = MLEN - len;
}
m->m_data += adjust &~ (sizeof(long)-1);
}