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Pass the sf buf to MEXTADD() as the optional argument. This permits

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the simplification of socow_iodone() and sf_buf_free(); they don't
have to reverse engineer the sf buf from the data's address.
This commit is contained in:
Alan Cox 2003-03-16 07:19:12 +00:00
parent 5501d40bb9
commit 42de97a50a
2 changed files with 6 additions and 11 deletions
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9
sys/kern/uipc_cow.c
View File

@ -77,9 +77,6 @@ struct netsend_cow_stats {
static struct netsend_cow_stats socow_stats = {0,0,0,0,0,0,0,0,0,0,0};
extern struct sf_buf *sf_bufs;
extern vm_offset_t sf_base;
#define dtosf(x) (&sf_bufs[((uintptr_t)(x) - (uintptr_t)sf_base) >> PAGE_SHIFT])
static void socow_iodone(void *addr, void *args);
static void
@ -89,7 +86,7 @@ socow_iodone(void *addr, void *args)
struct sf_buf *sf;
vm_page_t pp;
sf = dtosf(addr);
sf = args;
pp = sf->m;
s = splvm();
/* remove COW mapping */
@ -98,7 +95,7 @@ socow_iodone(void *addr, void *args)
vm_page_unlock_queues();
splx(s);
/* note that sf_buf_free() unwires the page for us*/
sf_buf_free(addr, NULL);
sf_buf_free(addr, args);
socow_stats.iodone++;
}
@ -153,7 +150,7 @@ socow_setup(struct mbuf *m0, struct uio *uio)
*/
m0->m_data = (caddr_t)sf->kva;
m0->m_len = PAGE_SIZE;
MEXTADD(m0, sf->kva, PAGE_SIZE, socow_iodone, NULL, 0, EXT_SFBUF);
MEXTADD(m0, sf->kva, PAGE_SIZE, socow_iodone, sf, 0, EXT_SFBUF);
socow_stats.success++;
iov = uio->uio_iov;

8
sys/kern/uipc_syscalls.c
View File

@ -1661,8 +1661,6 @@ sf_buf_alloc()
return (sf);
}
#define dtosf(x) (&sf_bufs[((uintptr_t)(x) - (uintptr_t)sf_base) >> PAGE_SHIFT])
/*
* Detatch mapped page and release resources back to the system.
*/
@ -1672,7 +1670,7 @@ sf_buf_free(void *addr, void *args)
struct sf_buf *sf;
struct vm_page *m;
sf = dtosf(addr);
sf = args;
pmap_qremove((vm_offset_t)addr, 1);
m = sf->m;
vm_page_lock_queues();
@ -1955,14 +1953,14 @@ do_sendfile(struct thread *td, struct sendfile_args *uap, int compat)
MGETHDR(m, M_TRYWAIT, MT_DATA);
if (m == NULL) {
error = ENOBUFS;
sf_buf_free((void *)sf->kva, NULL);
sf_buf_free((void *)sf->kva, sf);
sbunlock(&so->so_snd);
goto done;
}
/*
* Setup external storage for mbuf.
*/
MEXTADD(m, sf->kva, PAGE_SIZE, sf_buf_free, NULL, M_RDONLY,
MEXTADD(m, sf->kva, PAGE_SIZE, sf_buf_free, sf, M_RDONLY,
EXT_SFBUF);
m->m_data = (char *) sf->kva + pgoff;
m->m_pkthdr.len = m->m_len = xfsize;