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Fix some memory bugs with regard to jumbo buffers. I made a mistake when

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converting from the old external mbuf buffer code to the new (with the
MEXTADD() macro). Also free free list memory correctly in
foo_free_jumbo_mem() routines: grab the head of the list, then
remove it, _then_ free() it.

This fixes the memory corruption problem I've been chasing in the level 1
driver.
This commit is contained in:
Bill Paul 2001-06-18 22:04:40 +00:00
parent cfd1472cef
commit 7437599f41
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=78440
4 changed files with 10 additions and 16 deletions
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12
sys/dev/lge/if_lge.c
View File

@ -791,12 +791,12 @@ static int lge_newbuf(sc, c, m)
}
/* Attach the buffer to the mbuf */
m_new->m_data = (void *)buf;
m_new->m_len = m_new->m_pkthdr.len = LGE_MCLBYTES;
MEXTADD(m_new, buf, LGE_MCLBYTES, lge_jfree,
m_new->m_len = m_new->m_pkthdr.len = LGE_JUMBO_FRAMELEN;
MEXTADD(m_new, buf, LGE_JUMBO_FRAMELEN, lge_jfree,
(struct lge_softc *)sc, 0, EXT_NET_DRV);
} else {
m_new = m;
m_new->m_len = m_new->m_pkthdr.len = LGE_MCLBYTES;
m_new->m_len = m_new->m_pkthdr.len = LGE_JUMBO_FRAMELEN;
m_new->m_data = m_new->m_ext.ext_buf;
}
@ -857,12 +857,10 @@ static int lge_alloc_jumbo_mem(sc)
ptr = sc->lge_cdata.lge_jumbo_buf;
for (i = 0; i < LGE_JSLOTS; i++) {
sc->lge_cdata.lge_jslots[i] = ptr;
ptr += LGE_MCLBYTES;
ptr += LGE_JLEN;
entry = malloc(sizeof(struct lge_jpool_entry),
M_DEVBUF, M_NOWAIT);
if (entry == NULL) {
free(sc->lge_cdata.lge_jumbo_buf, M_DEVBUF);
sc->lge_cdata.lge_jumbo_buf = NULL;
printf("lge%d: no memory for jumbo "
"buffer queue!\n", sc->lge_unit);
return(ENOBUFS);
@ -883,8 +881,8 @@ static void lge_free_jumbo_mem(sc)
for (i = 0; i < LGE_JSLOTS; i++) {
entry = SLIST_FIRST(&sc->lge_jfree_listhead);
free(entry, M_DEVBUF);
SLIST_REMOVE_HEAD(&sc->lge_jfree_listhead, jpool_entries);
free(entry, M_DEVBUF);
}
contigfree(sc->lge_cdata.lge_jumbo_buf, LGE_JMEM, M_DEVBUF);

1
sys/dev/lge/if_lgereg.h
View File

@ -502,7 +502,6 @@ struct lge_mii_frame {
#define LGE_JRAWLEN (LGE_JUMBO_FRAMELEN + ETHER_ALIGN)
#define LGE_JLEN (LGE_JRAWLEN + (sizeof(u_int64_t) - \
(LGE_JRAWLEN % sizeof(u_int64_t))))
#define LGE_MCLBYTES (LGE_JLEN - sizeof(u_int64_t))
#define LGE_JPAGESZ PAGE_SIZE
#define LGE_RESID (LGE_JPAGESZ - (LGE_JLEN * LGE_JSLOTS) % LGE_JPAGESZ)
#define LGE_JMEM ((LGE_JLEN * LGE_JSLOTS) + LGE_RESID)

12
sys/dev/nge/if_nge.c
View File

@ -1098,12 +1098,12 @@ static int nge_newbuf(sc, c, m)
}
/* Attach the buffer to the mbuf */
m_new->m_data = (void *)buf;
m_new->m_len = m_new->m_pkthdr.len = NGE_MCLBYTES;
MEXTADD(m_new, buf, NGE_MCLBYTES, nge_jfree,
m_new->m_len = m_new->m_pkthdr.len = NGE_JUMBO_FRAMELEN;
MEXTADD(m_new, buf, NGE_JUMBO_FRAMELEN, nge_jfree,
(struct nge_softc *)sc, 0, EXT_NET_DRV);
} else {
m_new = m;
m_new->m_len = m_new->m_pkthdr.len = NGE_MCLBYTES;
m_new->m_len = m_new->m_pkthdr.len = NGE_JUMBO_FRAMELEN;
m_new->m_data = m_new->m_ext.ext_buf;
}
@ -1143,12 +1143,10 @@ static int nge_alloc_jumbo_mem(sc)
ptr = sc->nge_cdata.nge_jumbo_buf;
for (i = 0; i < NGE_JSLOTS; i++) {
sc->nge_cdata.nge_jslots[i] = ptr;
ptr += NGE_MCLBYTES;
ptr += NGE_JLEN;
entry = malloc(sizeof(struct nge_jpool_entry),
M_DEVBUF, M_NOWAIT);
if (entry == NULL) {
free(sc->nge_cdata.nge_jumbo_buf, M_DEVBUF);
sc->nge_cdata.nge_jumbo_buf = NULL;
printf("nge%d: no memory for jumbo "
"buffer queue!\n", sc->nge_unit);
return(ENOBUFS);
@ -1169,8 +1167,8 @@ static void nge_free_jumbo_mem(sc)
for (i = 0; i < NGE_JSLOTS; i++) {
entry = SLIST_FIRST(&sc->nge_jfree_listhead);
free(entry, M_DEVBUF);
SLIST_REMOVE_HEAD(&sc->nge_jfree_listhead, jpool_entries);
free(entry, M_DEVBUF);
}
contigfree(sc->nge_cdata.nge_jumbo_buf, NGE_JMEM, M_DEVBUF);

1
sys/dev/nge/if_ngereg.h
View File

@ -611,7 +611,6 @@ struct nge_mii_frame {
#define NGE_JRAWLEN (NGE_JUMBO_FRAMELEN + ETHER_ALIGN)
#define NGE_JLEN (NGE_JRAWLEN + (sizeof(u_int64_t) - \
(NGE_JRAWLEN % sizeof(u_int64_t))))
#define NGE_MCLBYTES (NGE_JLEN - sizeof(u_int64_t))
#define NGE_JPAGESZ PAGE_SIZE
#define NGE_RESID (NGE_JPAGESZ - (NGE_JLEN * NGE_JSLOTS) % NGE_JPAGESZ)
#define NGE_JMEM ((NGE_JLEN * NGE_JSLOTS) + NGE_RESID)