Changeset 38901 in vbox for trunk/src/VBox/Additions

Timestamp:

Sep 29, 2011 2:29:44 PM (13 years ago)

Author:

vboxsync

Message:

Additions/solaris/SharedFolders: readonly MMAP support.

Location:

trunk/src/VBox/Additions/solaris/SharedFolders

Files:

• vboxfs_vnode.c (modified) (17 diffs)
• vboxfs_vnode.h (modified) (1 diff)

trunk/src/VBox/Additions/solaris/SharedFolders/vboxfs_vnode.c

@@ -97 +97 @@
 #include "vboxfs_vfs.h"
 
+#define VBOXVFS_WITH_MMAP
+
 static struct vnodeops *sffs_ops = NULL;
 
@@ -212 +214 @@
                 vp->v_vfsp = node->sf_sffs->sf_vfsp;
                 vn_setops(vp, sffs_ops);
-                vp->v_flag = VNOSWAP | VNOMAP;  /* @todo -XXX- remove VNOMAP when ro-mmap is working*/
+                vp->v_flag = VNOSWAP;
+#ifndef VBOXVFS_WITH_MMAP
+                vp->v_flag |= VNOMAP;
+#endif
                 vn_exists(vp);
                 vp->v_data = node;
@@ -1405 +1410 @@
         }
 
-#if 0
+#ifdef VBOXVFS_WITH_MMAP
         if (vn_vfswlock(vp)) {
                 VN_RELE(vp);
@@ -1457 +1462 @@
 
 
-#if 0
+#ifdef VBOXVFS_WITH_MMAP
 static caddr_t
 sffs_page_map(
@@ -1487 +1492 @@
  * the file data into it.
  */
-int
+static int
 sffs_readpages(
         vnode_t         *dvp,
@@ -1509 +1514 @@
         ASSERT(node->sf_file);
 
-        cmn_err(CE_NOTE, "sffs_readpages\n");
         if (pagelistsize == PAGESIZE)
         {
                 io_off = off;
                 io_len = PAGESIZE;
-
-                cmn_err(CE_NOTE, "sffs_readpages io_off=%lld io_len=%lld\n", (u_longlong_t)io_off, (u_longlong_t)io_len);
-
                 ppages = page_create_va(dvp, io_off, io_len, PG_WAIT | PG_EXCL, segp, addr);
         }
@@ -1525 +1526 @@
         if (!ppages)
         {
-                cmn_err(CE_NOTE, "sffs_readpages nothing done\n");
                 *pagelist = NULL;
                 return (0);
@@ -1539 +1539 @@
                 ASSERT3U(io_off, ==, pcur->p_offset);
 
-                cmn_err(CE_NOTE, "sffs_readpages page-by-page reading io_off=%lld\n", (u_longlong_t)io_off);
                 caddr_t virtaddr = sffs_page_map(pcur, segaccess);
                 uint32_t bytes = PAGESIZE;
                 error = sfprov_read(node->sf_file, virtaddr, io_off, &bytes);
                 sffs_page_unmap(pcur, virtaddr);
-                if (error != 0 || bytes < PAGESIZE)
+                if (error != 0)
                 {
+                        cmn_err(CE_WARN, "sffs_readpages: sfprov_read() failed. error=%d bytes=%ld\n", error, bytes);
                         /* Get rid of all kluster pages read & bail.  */
                         pvn_read_done(ppages,  B_ERROR);
@@ -1559 +1559 @@
         pvn_plist_init(ppages, pagelist, pagelistsize, off, io_len, segaccess);
         ASSERT(pagelist == NULL || (*pagelist)->p_offset == off);
-        cmn_err(CE_NOTE, "sffs_readpages done\n");
-
         return (0);
 }
@@ -1631 +1629 @@
                 }
 
-                cmn_err(CE_NOTE, "sffs_getpage addr=%p len=%lld off=%lld\n", addr, (u_longlong_t)len, (u_longlong_t)off);
                 while (*pagelist)
                 {
@@ -1661 +1658 @@
         *pagelist = NULL;
         mutex_exit(&sffs_lock);
-        cmn_err(CE_NOTE,  "sffs_getpage done\n");
         return (error);
 }
@@ -1684 +1680 @@
          */
         return (ENOSYS);
+}
+
+
+/*ARGSUSED*/
+static int
+sffs_discardpage(
+        vnode_t         *dvp,
+        page_t          *ppage,
+        u_offset_t      *poff,
+        size_t          *plen,
+        int                     flags,
+        cred_t          *pcred)
+{
+        /*
+         * We don't support PROT_WRITE mmaps. Just pretend we're done writing back
+         * to the disk while unmounting/closing the node and discarding the mapped pages.
+         */
+        pvn_write_done(ppage, B_INVAL | B_ERROR | B_FORCE);
+        return (0);
 }
 
@@ -1795 +1810 @@
 
         ASSERT(node);
-        ASMAtomicAddU64(&node->sf_mapcnt, npages);
         return (0);
 }
@@ -1823 +1837 @@
                 return (ENOSYS);
 
-        ASSERT(node->sf_mapcnt >= npages);
-        ASMAtomicSubU64(&node->sf_mapcnt, npages);
         return (0);
 }
-#endif
+#endif /* VBOXVFS_WITH_MMAP */
 
 
@@ -2004 +2016 @@
         }
 
-        /*
-         * There should never be cached data, since we don't support mmap().
-         */
-        if (vn_has_cached_data(vp))
+        if (vn_has_cached_data(vp)) {
+#ifdef VBOXVFS_WITH_MMAP
+                /* We're fine with releasing the vnode lock here as we should be covered by the sffs_lock */
+                mutex_exit(&vp->v_lock);
+                pvn_vplist_dirty(vp, 0 /* offset */, sffs_discardpage, B_INVAL, cr);
+                mutex_enter(&vp->v_lock);
+#else
                 panic("sffs_inactive() found cached data");
+#endif
+        }
 
         /*
@@ -2137 +2154 @@
         VOPNAME_WRITE,          sffs_write,
 
-# if 0
+# ifdef VBOXVFS_WITH_MMAP
         VOPNAME_MAP,            sffs_map,
         VOPNAME_ADDMAP,         sffs_addmap,
@@ -2168 +2185 @@
         VOPNAME_WRITE,          { .vop_write = sffs_write },
 
-# if 0
+# ifdef VBOXVFS_WITH_MMAP
         VOPNAME_MAP,            { .vop_map = sffs_map },
         VOPNAME_ADDMAP,         { .vop_addmap = sffs_addmap },

trunk/src/VBox/Additions/solaris/SharedFolders/vboxfs_vnode.h

@@ -61 +61 @@
         sffs_dirents_t  *sf_dir_list;   /* list of entries for this directory */
         sffs_stats_t    *sf_dir_stats;  /* file attrs for the above entries */
-#if 0
-    volatile uint64_t   sf_mapcnt;  /* number of mapped pages */
-#endif
 } sfnode_t;