Remove pre-Linux 2.6 support

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

diff --git a/src/afs/LINUX/osi_vm.c b/src/afs/LINUX/osi_vm.c
index 552697f..93b3548 100644 (file)
--- a/src/afs/LINUX/osi_vm.c
+++ b/src/afs/LINUX/osi_vm.c
@@ -10,8 +10,6 @@
 #include <afsconfig.h>
 #include "afs/param.h"
 
-RCSID
-    ("$Header$");
 
 #include "afs/sysincludes.h"   /* Standard vendor system headers */
 #include "afsincludes.h"       /* Afs-based standard headers */
@@ -43,21 +41,15 @@ RCSID
 int
 osi_VM_FlushVCache(struct vcache *avc, int *slept)
 {
-    struct inode *ip = AFSTOI(avc);
+    struct inode *ip = AFSTOV(avc);
 
-    if (VREFCOUNT(avc) != 0)
+    if (VREFCOUNT(avc) > 1)
        return EBUSY;
 
     if (avc->opens != 0)
        return EBUSY;
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
-    truncate_inode_pages(&ip->i_data, 0);
-#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,15)
-    truncate_inode_pages(ip, 0);
-#else
-    invalidate_inode_pages(ip);
-#endif
+    return vmtruncate(ip, 0);
     return 0;
 }
 
@@ -71,15 +63,11 @@ osi_VM_FlushVCache(struct vcache *avc, int *slept)
  * be some pages around when we return, newly created by concurrent activity.
  */
 void
-osi_VM_TryToSmush(struct vcache *avc, struct AFS_UCRED *acred, int sync)
+osi_VM_TryToSmush(struct vcache *avc, AFS_UCRED *acred, int sync)
 {
-    struct inode *ip = AFSTOI(avc);
+    struct inode *ip = AFSTOV(avc);
 
-#if defined(AFS_LINUX26_ENV)
     invalidate_inode_pages(ip->i_mapping);
-#else
-    invalidate_inode_pages(ip);
-#endif
 }
 
 /* Flush and invalidate pages, for fsync() with INVAL flag
@@ -100,41 +88,35 @@ osi_VM_FSyncInval(struct vcache *avc)
 void
 osi_VM_StoreAllSegments(struct vcache *avc)
 {
-    struct inode *ip = AFSTOI(avc);
+    struct inode *ip = AFSTOV(avc);
+
+    if (avc->f.states & CPageWrite)
+       return; /* someone already writing */
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,5)
     /* filemap_fdatasync() only exported in 2.4.5 and above */
     ReleaseWriteLock(&avc->lock);
     AFS_GUNLOCK();
-#if defined(AFS_LINUX26_ENV)
     filemap_fdatawrite(ip->i_mapping);
-#else
-    filemap_fdatasync(ip->i_mapping);
-#endif
     filemap_fdatawait(ip->i_mapping);
     AFS_GLOCK();
     ObtainWriteLock(&avc->lock, 121);
-#endif
 }
 
 /* Purge VM for a file when its callback is revoked.
  *
  * Locking:  No lock is held, not even the global lock.
  */
+
+/* Note that for speed some of our Linux vnodeops do not initialise credp
+ * before calling osi_FlushPages(). If credp is ever required on Linux,
+ * then these callers should be updated.
+ */
 void
-osi_VM_FlushPages(struct vcache *avc, struct AFS_UCRED *credp)
+osi_VM_FlushPages(struct vcache *avc, AFS_UCRED *credp)
 {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
-    struct inode *ip = AFSTOI(avc);
-
+    struct inode *ip = AFSTOV(avc);
+    
     truncate_inode_pages(&ip->i_data, 0);
-#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,15)
-    struct inode *ip = AFSTOI(avc);
-
-    truncate_inode_pages(ip, 0);
-#else
-    invalidate_inode_pages(AFSTOI(avc));
-#endif
 }
 
 /* Purge pages beyond end-of-file, when truncating a file.
@@ -144,17 +126,7 @@ osi_VM_FlushPages(struct vcache *avc, struct AFS_UCRED *credp)
  * it only works on Solaris.
  */
 void
-osi_VM_Truncate(struct vcache *avc, int alen, struct AFS_UCRED *acred)
+osi_VM_Truncate(struct vcache *avc, int alen, AFS_UCRED *acred)
 {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
-    struct inode *ip = AFSTOI(avc);
-
-    truncate_inode_pages(&ip->i_data, alen);
-#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,15)
-    struct inode *ip = AFSTOI(avc);
-
-    truncate_inode_pages(ip, alen);
-#else
-    invalidate_inode_pages(AFSTOI(avc));
-#endif
+    vmtruncate(AFSTOV(avc), alen);
 }