* return (error); // done, report error
*/
-#if defined(_KERNEL) && defined(HAVE_MMAP)
-/*
- * Utility functions to map and unmap a single physical page. These
- * are used to manage the mappable copies of ZFS file data, and therefore
- * do not update ref/mod bits.
- */
-caddr_t
-zfs_map_page(page_t *pp, enum seg_rw rw)
-{
- if (kpm_enable)
- return (hat_kpm_mapin(pp, 0));
- ASSERT(rw == S_READ || rw == S_WRITE);
- return (ppmapin(pp, PROT_READ | ((rw == S_WRITE) ? PROT_WRITE : 0),
- (caddr_t)-1));
-}
-
-void
-zfs_unmap_page(page_t *pp, caddr_t addr)
-{
- if (kpm_enable) {
- hat_kpm_mapout(pp, 0, addr);
- } else {
- ppmapout(addr);
- }
-}
-
+#if defined(_KERNEL)
/*
* When a file is memory mapped, we must keep the IO data synchronized
* between the DMU cache and the memory mapped pages. What this means:
* the page and the dmu buffer.
*/
static void
-update_pages(struct inode *ip, int64_t start, int len, objset_t *os,
- uint64_t oid)
+update_pages(struct inode *ip, int64_t start, int len,
+ objset_t *os, uint64_t oid)
{
+ struct address_space *mp = ip->i_mapping;
+ struct page *pp;
+ uint64_t nbytes;
int64_t off;
+ void *pb;
- off = start & PAGEOFFSET;
- for (start &= PAGEMASK; len > 0; start += PAGESIZE) {
- page_t *pp;
- uint64_t nbytes = MIN(PAGESIZE - off, len);
+ off = start & (PAGE_CACHE_SIZE-1);
+ for (start &= PAGE_CACHE_MASK; len > 0; start += PAGE_CACHE_SIZE) {
+ nbytes = MIN(PAGE_CACHE_SIZE - off, len);
- if (pp = page_lookup(ip, start, SE_SHARED)) {
- caddr_t va;
+ pp = find_lock_page(mp, start >> PAGE_CACHE_SHIFT);
+ if (pp) {
+ if (mapping_writably_mapped(mp))
+ flush_dcache_page(pp);
- va = zfs_map_page(pp, S_WRITE);
- (void) dmu_read(os, oid, start+off, nbytes, va+off,
+ pb = kmap(pp);
+ (void) dmu_read(os, oid, start+off, nbytes, pb+off,
DMU_READ_PREFETCH);
- zfs_unmap_page(pp, va);
- page_unlock(pp);
+ kunmap(pp);
+
+ if (mapping_writably_mapped(mp))
+ flush_dcache_page(pp);
+
+ mark_page_accessed(pp);
+ SetPageUptodate(pp);
+ ClearPageError(pp);
+ unlock_page(pp);
+ page_cache_release(pp);
}
+
len -= nbytes;
off = 0;
}
static int
mappedread(struct inode *ip, int nbytes, uio_t *uio)
{
+ struct address_space *mp = ip->i_mapping;
+ struct page *pp;
znode_t *zp = ITOZ(ip);
objset_t *os = ITOZSB(ip)->z_os;
int64_t start, off;
+ uint64_t bytes;
int len = nbytes;
int error = 0;
+ void *pb;
start = uio->uio_loffset;
- off = start & PAGEOFFSET;
- for (start &= PAGEMASK; len > 0; start += PAGESIZE) {
- page_t *pp;
- uint64_t bytes = MIN(PAGESIZE - off, len);
-
- if (pp = page_lookup(ip, start, SE_SHARED)) {
- caddr_t va;
-
- va = zfs_map_page(pp, S_READ);
- error = uiomove(va + off, bytes, UIO_READ, uio);
- zfs_unmap_page(pp, va);
- page_unlock(pp);
+ off = start & (PAGE_CACHE_SIZE-1);
+ for (start &= PAGE_CACHE_MASK; len > 0; start += PAGE_CACHE_SIZE) {
+ bytes = MIN(PAGE_CACHE_SIZE - off, len);
+
+ pp = find_lock_page(mp, start >> PAGE_CACHE_SHIFT);
+ if (pp) {
+ ASSERT(PageUptodate(pp));
+
+ pb = kmap(pp);
+ error = uiomove(pb + off, bytes, UIO_READ, uio);
+ kunmap(pp);
+
+ if (mapping_writably_mapped(mp))
+ flush_dcache_page(pp);
+
+ mark_page_accessed(pp);
+ unlock_page(pp);
+ page_cache_release(pp);
} else {
error = dmu_read_uio(os, zp->z_id, uio, bytes);
}
+
len -= bytes;
off = 0;
if (error)
}
return (error);
}
-#endif /* _KERNEL && HAVE_MMAP */
+#endif /* _KERNEL */
offset_t zfs_read_chunk_size = 1024 * 1024; /* Tunable */
* IN: ip - inode of file to be read from.
* uio - structure supplying read location, range info,
* and return buffer.
- * ioflag - SYNC flags; used to provide FRSYNC semantics.
+ * ioflag - FSYNC flags; used to provide FRSYNC semantics.
+ * O_DIRECT flag; used to bypass page cache.
* cr - credentials of caller.
*
* OUT: uio - updated offset and range, buffer filled.
nbytes = MIN(n, zfs_read_chunk_size -
P2PHASE(uio->uio_loffset, zfs_read_chunk_size));
-/* XXX: Drop this, ARC update handled by zpl layer */
-#ifdef HAVE_MMAP
- if (vn_has_cached_data(ip))
+ if (zp->z_is_mapped && !(ioflag & O_DIRECT))
error = mappedread(ip, nbytes, uio);
else
error = dmu_read_uio(os, zp->z_id, uio, nbytes);
-#else
- error = dmu_read_uio(os, zp->z_id, uio, nbytes);
-#endif /* HAVE_MMAP */
+
if (error) {
/* convert checksum errors into IO errors */
if (error == ECKSUM)
* uio - structure supplying write location, range info,
* and data buffer.
* ioflag - FAPPEND flag set if in append mode.
+ * O_DIRECT flag; used to bypass page cache.
* cr - credentials of caller.
*
* OUT: uio - updated offset and range.
ASSERT(tx_bytes <= uio->uio_resid);
uioskip(uio, tx_bytes);
}
-/* XXX: Drop this, ARC update handled by zpl layer */
-#ifdef HAVE_MMAP
- if (tx_bytes && vn_has_cached_data(ip)) {
- update_pages(ip, woff,
- tx_bytes, zsb->z_os, zp->z_id);
- }
-#endif /* HAVE_MMAP */
+
+ if (tx_bytes && zp->z_is_mapped && !(ioflag & O_DIRECT))
+ update_pages(ip, woff, tx_bytes, zsb->z_os, zp->z_id);
/*
* If we made no progress, we're done. If we made even
}
EXPORT_SYMBOL(zfs_link);
+#ifdef HAVE_MMAP
/*
* zfs_null_putapage() is used when the file system has been force
* unmounted. It just drops the pages.
ZFS_EXIT(zfsvfs);
return (error);
}
+#endif /* HAVE_MMAP */
/*ARGSUSED*/
void
-zfs_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct)
+zfs_inactive(struct inode *ip)
{
- znode_t *zp = VTOZ(vp);
- zfsvfs_t *zfsvfs = zp->z_zfsvfs;
+ znode_t *zp = ITOZ(ip);
+ zfs_sb_t *zsb = ITOZSB(ip);
int error;
- rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_READER);
- if (zp->z_sa_hdl == NULL) {
- /*
- * The fs has been unmounted, or we did a
- * suspend/resume and this file no longer exists.
- */
- if (vn_has_cached_data(vp)) {
- (void) pvn_vplist_dirty(vp, 0, zfs_null_putapage,
- B_INVAL, cr);
- }
+ truncate_inode_pages(&ip->i_data, 0);
- mutex_enter(&zp->z_lock);
- mutex_enter(&vp->v_lock);
- ASSERT(vp->v_count == 1);
- vp->v_count = 0;
- mutex_exit(&vp->v_lock);
- mutex_exit(&zp->z_lock);
- rw_exit(&zfsvfs->z_teardown_inactive_lock);
- zfs_znode_free(zp);
- return;
- }
+#ifdef HAVE_SNAPSHOT
+ /* Early return for snapshot inode? */
+#endif /* HAVE_SNAPSHOT */
- /*
- * Attempt to push any data in the page cache. If this fails
- * we will get kicked out later in zfs_zinactive().
- */
- if (vn_has_cached_data(vp)) {
- (void) pvn_vplist_dirty(vp, 0, zfs_putapage, B_INVAL|B_ASYNC,
- cr);
+ rw_enter(&zsb->z_teardown_inactive_lock, RW_READER);
+ if (zp->z_sa_hdl == NULL) {
+ rw_exit(&zsb->z_teardown_inactive_lock);
+ return;
}
if (zp->z_atime_dirty && zp->z_unlinked == 0) {
- dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os);
+ dmu_tx_t *tx = dmu_tx_create(zsb->z_os);
dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE);
zfs_sa_upgrade_txholds(tx, zp);
}
EXPORT_SYMBOL(zfs_seek);
+#ifdef HAVE_MMAP
/*
* Pre-filter the generic locking function to trap attempts to place
* a mandatory lock on a memory mapped file.
return (0);
}
+#endif /* HAVE_MMAP */
/*
* convoff - converts the given data (start, whence) to the
git://git.camperquake.de / zfs.git / blobdiff