linux-dont-flush-writes-on-exec-20080326

[openafs.git] / src / afs / LINUX / osi_vnodeops.c

diff --git a/src/afs/LINUX/osi_vnodeops.c b/src/afs/LINUX/osi_vnodeops.c
index 16ef9d6..ded2fa7 100644 (file)
--- a/src/afs/LINUX/osi_vnodeops.c
+++ b/src/afs/LINUX/osi_vnodeops.c
@@ -582,18 +582,24 @@ afs_linux_flush(struct file *fp)
 #endif
 {
     struct vrequest treq;
-    struct vcache *vcp = VTOAFS(FILE_INODE(fp));
-    cred_t *credp = crref();
+    struct vcache *vcp;
+    cred_t *credp;
     int code;
 
     AFS_GLOCK();
 
+    if (fp->f_flags | O_RDONLY)     /* readers dont flush */
+       return 0;
+
+    credp = crref();
+    vcp = VTOAFS(FILE_INODE(fp));
+
     code = afs_InitReq(&treq, credp);
     if (code)
        goto out;
 
     ObtainSharedLock(&vcp->lock, 535);
-    if (vcp->execsOrWriters > 0) {
+    if ((vcp->execsOrWriters > 0) && (file_count(fp) == 1)) {
        UpgradeSToWLock(&vcp->lock, 536);
        code = afs_StoreAllSegments(vcp, &treq, AFS_SYNC | AFS_LASTSTORE);
        ConvertWToSLock(&vcp->lock);