Formerly node-rdwr.c.~2~

1 files changed, 31 insertions, 31 deletions

diff --git a/libdiskfs/node-rdwr.c b/libdiskfs/node-rdwr.c
index 4ee9a213..3c099e4c 100644
--- a/libdiskfs/node-rdwr.c
+++ b/libdiskfs/node-rdwr.c
@@ -18,48 +18,48 @@
 #include "priv.h"
 
 /* Reading and writing of files. this is called by other filesystem
-   routines and handles extension of files and reads of more than is
-   left automatically.  NP is the node to be read or written.  DATA
-   will be written or filled.  OFF identifies where in thi fel the I/O
-   is to take place (-1 is not allowed).  AMT is the size of DATA and
-   tells how much to copy.  DIR is 1 for writing and 0 for reading.
-   CRED is the user doing the access (only used to validate attempted
-   file extension). */
+   routines and handles extension of files automatically.  NP is the
+   node to be read or written, and must be locked.  DATA will be
+   written or filled.  OFF identifies where in thi fel the I/O is to
+   take place (-1 is not allowed).  AMT is the size of DATA and tells
+   how much to copy.  DIR is 1 for writing and 0 for reading.  CRED is
+   the user doing the access (only used to validate attempted file
+   extension).  For reads, *AMTREAD is filled with the amount actually
+   read.  */
 error_t
-diskfs_noderdwr (struct inode *ip, 
-	 char *data,
-	 off_t off, 
-	 int amt, 
-	 int dir,
-	 struct protid *cred)
+diskfs_node_rdwr (struct node *np, 
+		  char *data,
+		  off_t off, 
+		  int amt, 
+		  int dir,
+		  struct protid *cred,
+		  int *amtread)
 {
   error_t err;
   
-  if (err = ioserver_get_conch (&ip->i_conch))
+  err = ioserver_get_conch (&np->i_conch);
+  if (err)
     return err;
   
-  if (!(err = catch_exception ()))
+  if (dir)
+    while (off + amt > np->allocsize)
+      if (err = diskfs_grow (np, off + amt, cred))
+	return err;
+
+  if (off + amt > np->dn_stat.st_size)
     {
       if (dir)
-	while (off + amt > ip->i_allocsize)
-	  if (err = file_extend (ip, off + amt, cred))
-	    return err;
-
-      if (off + amt > ip->di->di_size)
 	{
-	  assert (dir);		/* reads can't go past EOF internally */
-	  if (dir)
-	    {
-	      ip->di->di_size = off + amt;
-	      ip->di->di_ctime = wallclock->seconds;
-	    }
+	  np->dn_stat.st_size = off + amt;
+	  np->dn_set_ctime = 1;
 	}
-      end_catch_exception ();
+      else
+	amt = np->dn_stat.st_size - off;
     }
-  if (err)
-    return err;
-  
-  err = io_rdwr (ip, data, off, amt, dir);
+
+  err = _diskfs_rdwr_internal (np, data, off, amt, dir);
+  if (!err)
+    *amtread = amt;
 
   return err;
 }