#include <afsconfig.h>
#include "afs/param.h"
-
-#if defined(AFS_CACHE_BYPASS)
-
+#if defined(AFS_CACHE_BYPASS) || defined(UKERNEL)
#include "afs/afs_bypasscache.h"
/*
#include "afs/nfsclient.h"
#include "rx/rx_globals.h"
-#if defined(AFS_LINUX26_ENV)
-#define LockPage(pp) lock_page(pp)
-#define UnlockPage(pp) unlock_page(pp)
-#endif
-
#ifndef afs_min
#define afs_min(A,B) ((A)<(B)) ? (A) : (B)
#endif
* Someone may have beat us to doing the transition - we had no lock
* when we checked the flag earlier. No cause to panic, just return.
*/
- if (avc->f.states & FCSBypass)
+ if (avc->cachingStates & FCSBypass)
goto done;
/* If we never cached this, just change state */
if (setDesire && (!(avc->cachingStates & FCSBypass))) {
- avc->f.states |= FCSBypass;
+ avc->cachingStates |= FCSBypass;
goto done;
}
* Someone may have beat us to doing the transition - we had no lock
* when we checked the flag earlier. No cause to panic, just return.
*/
- if (!(avc->f.states & FCSBypass))
+ if (!(avc->cachingStates & FCSBypass))
goto done;
/* Ok, we actually do need to flush */
* afs_PrefetchNoCache, all of the pages they've been passed need
* to be unlocked.
*/
-#if defined(AFS_LINUX24_ENV)
+#ifdef UKERNEL
+typedef void * bypass_page_t;
+
+#define unlock_and_release_pages(auio)
+#define release_full_page(pp, pageoff)
+
+#else
+typedef struct page * bypass_page_t;
+
#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)) \
- UnlockPage(pp); \
+ unlock_page(pp); \
put_page(pp); /* decrement refcount */ \
} \
iovno++; \
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, pageoff) \
+ 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
+
+static void
+afs_bypass_copy_page(bypass_page_t pp, int pageoff, struct iovec *rxiov,
+ int iovno, int iovoff, struct uio *auio, int curiov, int partial)
+{
+ char *address;
+ int dolen;
+
+ if (partial)
+ dolen = rxiov[iovno].iov_len - iovoff;
+ else
+ dolen = auio->uio_iov[curiov].iov_len - pageoff;
+
+#if !defined(UKERNEL)
+# if defined(KMAP_ATOMIC_TAKES_NO_KM_TYPE)
+ address = kmap_atomic(pp);
+# else
+ address = kmap_atomic(pp, KM_USER0);
+# endif
#else
-#ifdef UKERNEL
-#define unlock_and_release_pages(auio) \
- do { } while(0)
-#else
-#error AFS_CACHE_BYPASS not implemented on this platform
+ address = pp;
#endif
+ memcpy(address + pageoff, (char *)(rxiov[iovno].iov_base) + iovoff, dolen);
+#if !defined(UKERNEL)
+# if defined(KMAP_ATOMIC_TAKES_NO_KM_TYPE)
+ kunmap_atomic(address);
+# else
+ kunmap_atomic(address, KM_USER0);
+# endif
#endif
+}
/* no-cache prefetch routine */
static afs_int32
afs_NoCacheFetchProc(struct rx_call *acall,
struct vcache *avc,
- uio_t *auio,
+ struct uio *auio,
afs_int32 release_pages,
afs_int32 size)
{
afs_int32 length;
afs_int32 code;
- int tlen;
- int moredata, iovno, iovoff, iovmax, clen, result, locked;
+ int moredata, iovno, iovoff, iovmax, result, locked;
struct iovec *ciov;
- struct page *pp;
- char *address;
- char *page_buffer = osi_Alloc(PAGE_SIZE);
+ struct iovec *rxiov;
+ 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;
- do {
+ do {
COND_GUNLOCK(locked);
code = rx_Read(acall, (char *)&length, sizeof(afs_int32));
COND_RE_GLOCK(locked);
-
if (code != sizeof(afs_int32)) {
- result = 0;
+ result = EIO;
afs_warn("Preread error. code: %d instead of %d\n",
code, (int)sizeof(afs_int32));
unlock_and_release_pages(auio);
moredata = 0;
}
- while (length > 0) {
-
- clen = ciov->iov_len - iovoff;
- tlen = afs_min(length, clen);
-#ifdef AFS_LINUX24_ENV
- address = page_buffer;
-#else
-#ifndef UKERNEL
-#error AFS_CACHE_BYPASS not implemented on this platform
-#endif
-#endif /* LINUX24 */
- COND_GUNLOCK(locked);
- code = rx_Read(acall, address, tlen);
- COND_RE_GLOCK(locked);
-
- if (code < 0) {
- afs_warn("afs_NoCacheFetchProc: rx_Read error. Return code was %d\n", code);
- result = 0;
- unlock_and_release_pages(auio);
- goto done;
- } else if (code == 0) {
- result = 0;
- afs_warn("afs_NoCacheFetchProc: rx_Read returned zero. Aborting.\n");
- unlock_and_release_pages(auio);
- goto done;
- }
- length -= code;
- tlen -= code;
-
- if(tlen > 0) {
- iovoff += code;
- address += code;
- } else {
-#ifdef AFS_LINUX24_ENV
- if(pp) {
- address = kmap_atomic(pp, KM_USER0);
- memcpy(address, page_buffer, PAGE_SIZE);
- kunmap_atomic(address, KM_USER0);
+ for (curpage = 0; curpage <= iovmax; curpage++) {
+ pageoff = 0;
+ /* properly, this should track uio_resid, not a fixed page size! */
+ while (pageoff < auio->uio_iov[curpage].iov_len) {
+ /* If no more iovs, issue new read. */
+ if (iovno >= nio) {
+ COND_GUNLOCK(locked);
+ bytes = rx_Readv(acall, rxiov, &nio, RX_MAXIOVECS, length);
+ COND_RE_GLOCK(locked);
+ if (bytes < 0) {
+ afs_warn("afs_NoCacheFetchProc: rx_Read error. Return code was %d\n", bytes);
+ result = bytes;
+ unlock_and_release_pages(auio);
+ goto done;
+ } else if (bytes == 0) {
+ /* we failed to read the full length */
+ result = EIO;
+ afs_warn("afs_NoCacheFetchProc: rx_Read returned zero. Aborting.\n");
+ unlock_and_release_pages(auio);
+ goto done;
+ }
+ size -= bytes;
+ iovno = 0;
}
-#else
-#ifndef UKERNEL
-#error AFS_CACHE_BYPASS not implemented on this platform
-#endif
-#endif /* LINUX 24 */
- /* we filled a page, conditionally release it */
- if (release_pages && ciov->iov_base) {
- /* this is appropriate when no caller intends to unlock
- * and release the page */
-#ifdef AFS_LINUX24_ENV
- SetPageUptodate(pp);
- if(PageLocked(pp))
- UnlockPage(pp);
- else
- afs_warn("afs_NoCacheFetchProc: page not locked at iovno %d!\n", iovno);
- put_page(pp); /* decrement refcount */
-#else
-#ifndef UKERNEL
-#error AFS_CACHE_BYPASS not implemented on this platform
-#endif
-#endif /* LINUX24 */
+ pp = (bypass_page_t)auio->uio_iov[curpage].iov_base;
+ if (pageoff + (rxiov[iovno].iov_len - iovoff) <= auio->uio_iov[curpage].iov_len) {
+ /* Copy entire (or rest of) current iovec into current page */
+ if (pp)
+ afs_bypass_copy_page(pp, pageoff, rxiov, iovno, iovoff, auio, curpage, 0);
+ length -= (rxiov[iovno].iov_len - iovoff);
+ pageoff += rxiov[iovno].iov_len - iovoff;
+ iovno++;
+ iovoff = 0;
+ } else {
+ /* Copy only what's needed to fill current page */
+ if (pp)
+ afs_bypass_copy_page(pp, pageoff, rxiov, iovno, iovoff, auio, curpage, 1);
+ length -= (auio->uio_iov[curpage].iov_len - pageoff);
+ iovoff += auio->uio_iov[curpage].iov_len - pageoff;
+ pageoff = auio->uio_iov[curpage].iov_len;
}
- /* and carry uio_iov */
- iovno++;
- if (iovno > iovmax)
- goto done;
- ciov = (auio->uio_iov + iovno);
- pp = (struct page*) ciov->iov_base;
- iovoff = 0;
+ /* we filled a page, or this is the last page. conditionally release it */
+ if (pp && ((pageoff == auio->uio_iov[curpage].iov_len &&
+ release_pages) || (length == 0 && iovno >= nio)))
+ release_full_page(pp, pageoff);
+
+ if (length == 0 && iovno >= nio)
+ goto done;
}
}
} while (moredata);
done:
- if(page_buffer)
- osi_Free(page_buffer, PAGE_SIZE);
+ osi_FreeSmallSpace(rxiov);
return result;
}
/* the reciever will free this */
areq = osi_Alloc(sizeof(struct vrequest));
- if (avc && avc->vc_error) {
+ if (avc->vc_error) {
code = EIO;
afs_warn("afs_ReadNoCache VCache Error!\n");
goto cleanup;
* do everything that would normally happen when the request was
* processed, like unlocking the pages and freeing memory.
*/
-#ifdef AFS_LINUX24_ENV
unlock_and_release_pages(bparms->auio);
-#else
-#ifndef UKERNEL
-#error AFS_CACHE_BYPASS not implemented on this platform
-#endif
-#endif
osi_Free(areq, sizeof(struct vrequest));
osi_Free(bparms->auio->uio_iov,
bparms->auio->uio_iovcnt * sizeof(struct iovec));
- osi_Free(bparms->auio, sizeof(uio_t));
+ osi_Free(bparms->auio, sizeof(struct uio));
osi_Free(bparms, sizeof(struct nocache_read_request));
return code;
}
afs_ucred_t *acred,
struct nocache_read_request *bparms)
{
- uio_t *auio;
+ struct uio *auio;
+#ifndef UKERNEL
struct iovec *iovecp;
+#endif
struct vrequest *areq;
afs_int32 code = 0;
+ struct rx_connection *rxconn;
#ifdef AFS_64BIT_CLIENT
afs_int32 length_hi, bytes, locked;
#endif
struct afs_conn *tc;
- afs_int32 i;
struct rx_call *tcall;
struct tlocal1 {
struct AFSVolSync tsync;
auio = bparms->auio;
areq = bparms->areq;
+#ifndef UKERNEL
iovecp = auio->uio_iov;
+#endif
- tcallspec = (struct tlocal1 *) osi_Alloc(sizeof(struct tlocal1));
+ tcallspec = osi_Alloc(sizeof(struct tlocal1));
do {
- tc = afs_Conn(&avc->f.fid, areq, SHARED_LOCK /* ignored */);
+ tc = afs_Conn(&avc->f.fid, areq, SHARED_LOCK /* ignored */, &rxconn);
if (tc) {
- avc->callback = tc->srvr->server;
- i = osi_Time();
- tcall = rx_NewCall(tc->id);
+ avc->callback = tc->parent->srvr->server;
+ tcall = rx_NewCall(rxconn);
#ifdef AFS_64BIT_CLIENT
if (!afs_serverHasNo64Bit(tc)) {
code = StartRXAFS_FetchData64(tcall,
pos = auio->uio_offset;
COND_GUNLOCK(locked);
if (!tcall)
- tcall = rx_NewCall(tc->id);
+ tcall = rx_NewCall(rxconn);
code = StartRXAFS_FetchData(tcall,
(struct AFSFid *) &avc->f.fid.Fid,
pos, bparms->length);
} else {
afs_warn("BYPASS: No connection.\n");
code = -1;
-#ifdef AFS_LINUX24_ENV
unlock_and_release_pages(auio);
-#else
-#ifndef UKERNEL
-#error AFS_CACHE_BYPASS not implemented on this platform
-#endif
-#endif
goto done;
}
- } while (afs_Analyze(tc, code, &avc->f.fid, areq,
+ } while (afs_Analyze(tc, rxconn, code, &avc->f.fid, areq,
AFS_STATS_FS_RPCIDX_FETCHDATA,
SHARED_LOCK,0));
done:
* Copy appropriate fields into vcache
*/
- afs_ProcessFS(avc, &tcallspec->OutStatus, areq);
+ if (!code)
+ afs_ProcessFS(avc, &tcallspec->OutStatus, areq);
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));
- osi_Free(auio, sizeof(uio_t));
+#ifndef UKERNEL
+ /* in UKERNEL, the "pages" are passed in */
+ osi_Free(iovecp, auio->uio_iovcnt * sizeof(struct iovec));
+ osi_Free(auio, sizeof(struct uio));
+#endif
return code;
}
-
-#endif /* AFS_CACHE_BYPASS */
+#endif
git://git.openafs.org / openafs.git / blobdiff