#include <afsconfig.h>
#include "afs/param.h"
-
-#if defined(AFS_CACHE_BYPASS) && defined(AFS_LINUX24_ENV)
-
+#if defined(AFS_CACHE_BYPASS) || defined(UKERNEL)
#include "afs/afs_bypasscache.h"
/*
* afs_PrefetchNoCache, all of the pages they've been passed need
* to be unlocked.
*/
+#ifdef UKERNEL
+typedef void * bypass_page_t;
+
+#define copy_page(pp, pageoff, rxiov, iovno, iovoff, auio) \
+ do { \
+ memcpy(((char *)pp) + pageoff, \
+ ((char *)rxiov[iovno].iov_base) + iovoff, \
+ PAGE_CACHE_SIZE - pageoff); \
+ auio->uio_resid -= (PAGE_CACHE_SIZE - pageoff); \
+ } while(0)
+
+#define copy_pages(pp, pageoff, rxiov, iovno, iovoff, auio) \
+ do { \
+ memcpy(((char *)pp) + pageoff, \
+ ((char *)rxiov[iovno].iov_base) + iovoff, \
+ rxiov[iovno].iov_len - iovoff); \
+ auio->uio_resid -= (rxiov[iovno].iov_len - iovoff); \
+ } while(0)
+
+#define unlock_and_release_pages(auio)
+#define release_full_page(pp)
+#else
+typedef struct page * bypass_page_t;
+
+#define copy_page(pp, pageoff, rxiov, iovno, iovoff, auio) \
+ do { \
+ char *address; \
+ address = kmap_atomic(pp, KM_USER0); \
+ memcpy(address + pageoff, \
+ (char *)(rxiov[iovno].iov_base) + iovoff, \
+ PAGE_CACHE_SIZE - pageoff); \
+ kunmap_atomic(address, KM_USER0); \
+ } while(0)
+
+#define copy_pages(pp, pageoff, rxiov, iovno, iovoff, auio) \
+ do { \
+ char *address; \
+ address = kmap_atomic(pp, KM_USER0); \
+ memcpy(address + pageoff, \
+ (char *)(rxiov[iovno].iov_base) + iovoff, \
+ rxiov[iovno].iov_len - iovoff); \
+ kunmap_atomic(address, KM_USER0); \
+ } while(0)
+
+
#define unlock_and_release_pages(auio) \
do { \
struct iovec *ciov; \
- struct page *pp; \
+ bypass_page_t pp; \
afs_int32 iovmax; \
afs_int32 iovno = 0; \
ciov = auio->uio_iov; \
iovmax = auio->uio_iovcnt - 1; \
- pp = (struct page*) ciov->iov_base; \
+ pp = (bypass_page_t) ciov->iov_base; \
while(1) { \
if (pp) { \
if (PageLocked(pp)) \
if(iovno > iovmax) \
break; \
ciov = (auio->uio_iov + iovno); \
- pp = (struct page*) ciov->iov_base; \
+ pp = (bypass_page_t) ciov->iov_base; \
} \
} while(0)
+#define release_full_page(pp) \
+ do { \
+ /* this is appropriate when no caller intends to unlock \
+ * and release the page */ \
+ SetPageUptodate(pp); \
+ if(PageLocked(pp)) \
+ unlock_page(pp); \
+ else \
+ afs_warn("afs_NoCacheFetchProc: page not locked!\n"); \
+ put_page(pp); /* decrement refcount */ \
+ } while(0)
+
+#endif
+
/* no-cache prefetch routine */
static afs_int32
afs_NoCacheFetchProc(struct rx_call *acall,
int moredata, iovno, iovoff, iovmax, result, locked;
struct iovec *ciov;
struct iovec *rxiov;
- int nio;
- struct page *pp;
- char *address;
+ int nio = 0;
+ bypass_page_t pp;
int curpage, bytes;
int pageoff;
rxiov = osi_AllocSmallSpace(sizeof(struct iovec) * RX_MAXIOVECS);
ciov = auio->uio_iov;
- pp = (struct page*) ciov->iov_base;
+ pp = (bypass_page_t) ciov->iov_base;
iovmax = auio->uio_iovcnt - 1;
iovno = iovoff = result = 0;
for (curpage = 0; curpage <= iovmax; curpage++) {
pageoff = 0;
- while (pageoff < 4096) {
+ /* properly, this should track uio_resid, not a fixed page size! */
+ while (pageoff < PAGE_CACHE_SIZE) {
/* If no more iovs, issue new read. */
if (iovno >= nio) {
COND_GUNLOCK(locked);
length -= bytes;
iovno = 0;
}
- pp = (struct page *)auio->uio_iov[curpage].iov_base;
+ pp = (bypass_page_t)auio->uio_iov[curpage].iov_base;
if (pageoff + (rxiov[iovno].iov_len - iovoff) <= PAGE_CACHE_SIZE) {
/* Copy entire (or rest of) current iovec into current page */
- if (pp) {
- address = kmap_atomic(pp, KM_USER0);
- memcpy(address + pageoff, rxiov[iovno].iov_base + iovoff,
- rxiov[iovno].iov_len - iovoff);
- kunmap_atomic(address, KM_USER0);
- }
+ if (pp)
+ copy_pages(pp, pageoff, rxiov, iovno, iovoff, auio);
pageoff += rxiov[iovno].iov_len - iovoff;
iovno++;
iovoff = 0;
} else {
/* Copy only what's needed to fill current page */
- if (pp) {
- address = kmap_atomic(pp, KM_USER0);
- memcpy(address + pageoff, rxiov[iovno].iov_base + iovoff,
- PAGE_CACHE_SIZE - pageoff);
- kunmap_atomic(address, KM_USER0);
- }
+ if (pp)
+ copy_page(pp, pageoff, rxiov, iovno, iovoff, auio);
iovoff += PAGE_CACHE_SIZE - pageoff;
pageoff = PAGE_CACHE_SIZE;
}
+
/* we filled a page, or this is the last page. conditionally release it */
if (pp && ((pageoff == PAGE_CACHE_SIZE && release_pages)
- || (length == 0 && iovno >= nio))) {
- /* this is appropriate when no caller intends to unlock
- * and release the page */
- SetPageUptodate(pp);
- if(PageLocked(pp))
- unlock_page(pp);
- else
- afs_warn("afs_NoCacheFetchProc: page not locked!\n");
- put_page(pp); /* decrement refcount */
- }
+ || (length == 0 && iovno >= nio)))
+ release_full_page(pp);
+
if (length == 0 && iovno >= nio)
goto done;
}
osi_Free(areq, sizeof(struct vrequest));
osi_Free(tcallspec, sizeof(struct tlocal1));
- osi_Free(iovecp, auio->uio_iovcnt * sizeof(struct iovec));
osi_Free(bparms, sizeof(struct nocache_read_request));
+#ifndef UKERNEL
+ /* in UKERNEL, the "pages" are passed in */
osi_Free(auio, sizeof(struct uio));
+ osi_Free(iovecp, auio->uio_iovcnt * sizeof(struct iovec));
+#endif
return code;
}
-
-#endif /* AFS_CACHE_BYPASS && AFS_LINUX24_ENV */
+#endif
git://git.openafs.org / openafs.git / blobdiff