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Differential D5396 Diff 13614 sys/kern/kern_sendfile.c

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sys/kern/kern_sendfile.c

Show First 20 Lines • Show All 113 Lines • ▼ Show 20 Linessfstat_sysctl(SYSCTL_HANDLER_ARGS)
if (req->newptr) if (req->newptr)
COUNTER_ARRAY_ZERO(sfstat, sizeof(s) / sizeof(uint64_t)); COUNTER_ARRAY_ZERO(sfstat, sizeof(s) / sizeof(uint64_t));
return (SYSCTL_OUT(req, &s, sizeof(s))); return (SYSCTL_OUT(req, &s, sizeof(s)));
} }
SYSCTL_PROC(_kern_ipc, OID_AUTO, sfstat, CTLTYPE_OPAQUE | CTLFLAG_RW, SYSCTL_PROC(_kern_ipc, OID_AUTO, sfstat, CTLTYPE_OPAQUE | CTLFLAG_RW,
NULL, 0, sfstat_sysctl, "I", "sendfile statistics"); NULL, 0, sfstat_sysctl, "I", "sendfile statistics");
/* /*
* Add more references to a vm_page + sf_buf + sendfile_sync. Called
* by mbuf(9) code to add extra references to a page.
*/
void
sf_ext_ref(void *arg1, void *arg2)
{
struct sf_buf *sf = arg1;
struct sendfile_sync *sfs = arg2;
vm_page_t pg = sf_buf_page(sf);
sf_buf_ref(sf);
vm_page_lock(pg);
vm_page_wire(pg);
vm_page_unlock(pg);
if (sfs != NULL) {
mtx_lock(&sfs->mtx);
KASSERT(sfs->count > 0, ("Sendfile sync botchup count == 0"));
sfs->count++;
mtx_unlock(&sfs->mtx);
}
}
/*
* Detach mapped page and release resources back to the system. Called * Detach mapped page and release resources back to the system. Called
* by mbuf(9) code when last reference to a page is freed. * by mbuf(9) code when last reference to a page is freed.
*/ */
void void
sf_ext_free(void *arg1, void *arg2) sf_ext_free(void *arg1, void *arg2)
{ {
struct sf_buf *sf = arg1; struct sf_buf *sf = arg1;
struct sendfile_sync *sfs = arg2; struct sendfile_sync *sfs = arg2;
▲ Show 20 Lines • Show All 647 Lines • ▼ Show 20 Lines for (int i = 0; i < npages; i++) {
*/ */
if ((flags & SF_NOCACHE) == 0 || if ((flags & SF_NOCACHE) == 0 ||
(i == npages - 1 && (i == npages - 1 &&
((off + space) & PAGE_MASK) && ((off + space) & PAGE_MASK) &&
(rem > space || rhpages > 0))) (rem > space || rhpages > 0)))
m0->m_ext.ext_type = EXT_SFBUF; m0->m_ext.ext_type = EXT_SFBUF;
else else
m0->m_ext.ext_type = EXT_SFBUF_NOCACHE; m0->m_ext.ext_type = EXT_SFBUF_NOCACHE;
m0->m_ext.ext_flags = 0; m0->m_ext.ext_flags = EXT_FLAG_EMBREF;
m0->m_ext.ext_count = 1;
m0->m_flags |= (M_EXT | M_RDONLY); m0->m_flags |= (M_EXT | M_RDONLY);
if (nios) if (nios)
m0->m_flags |= M_NOTREADY; m0->m_flags |= M_NOTREADY;
m0->m_data = (char *)sf_buf_kva(sf) + m0->m_data = (char *)sf_buf_kva(sf) +
(vmoff(i, off) & PAGE_MASK); (vmoff(i, off) & PAGE_MASK);
m0->m_len = xfsize(i, npages, off, space); m0->m_len = xfsize(i, npages, off, space);
if (i == 0) if (i == 0)
▲ Show 20 Lines • Show All 220 Lines • Show Last 20 Lines