From: Andrew Deason <adeason@sinenomine.net>
Date: Wed, 22 Jun 2011 19:39:39 +0000 (-0500)
Subject: afs: Use cell for md5 inode numbers
X-Git-Tag: openafs-devel-1_7_1~330
X-Git-Url: https://git.openafs.org/?p=openafs.git;a=commitdiff_plain;h=42943aead4db2bdf9b8ec01c3917eb1c9ac9eb76

afs: Use cell for md5 inode numbers

When calculating the inode number for a file with md5 inodes, include
the cell number in the calculation, in order to reduce collisions
between cells.

Change-Id: I4b939042dd993419f785a78e87e68cf346b56e26
Reviewed-on: http://gerrit.openafs.org/4902
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
---

diff --git a/src/afs/LINUX/osi_vnodeops.c b/src/afs/LINUX/osi_vnodeops.c
index eb1f8e7..3ddc7d9 100644
--- a/src/afs/LINUX/osi_vnodeops.c
+++ b/src/afs/LINUX/osi_vnodeops.c
@@ -345,7 +345,8 @@ afs_linux_readdir(struct file *fp, void *dirbuf, filldir_t filldir)
 	    break;
 	de = (struct DirEntry *)entry.data;
 
-	ino = afs_calc_inum (avc->f.fid.Fid.Volume, ntohl(de->fid.vnode));
+	ino = afs_calc_inum(avc->f.fid.Cell, avc->f.fid.Fid.Volume,
+	                    ntohl(de->fid.vnode));
 
 	if (de->name)
 	    len = strlen(de->name);
diff --git a/src/afs/LINUX24/osi_vnodeops.c b/src/afs/LINUX24/osi_vnodeops.c
index f86b0d2..8744691 100644
--- a/src/afs/LINUX24/osi_vnodeops.c
+++ b/src/afs/LINUX24/osi_vnodeops.c
@@ -305,7 +305,8 @@ afs_linux_readdir(struct file *fp, void *dirbuf, filldir_t filldir)
 	    break;
 	de = (struct DirEntry *)entry.data;
 
-	ino = afs_calc_inum (avc->f.fid.Fid.Volume, ntohl(de->fid.vnode));
+	ino = afs_calc_inum(avc->f.fid.Cell, avc->f.fid.Fid.Volume,
+	                    ntohl(de->fid.vnode));
 
 	if (de->name)
 	    len = strlen(de->name);
diff --git a/src/afs/VNOPS/afs_vnop_attrs.c b/src/afs/VNOPS/afs_vnop_attrs.c
index 13708d1..ef3f774 100644
--- a/src/afs/VNOPS/afs_vnop_attrs.c
+++ b/src/afs/VNOPS/afs_vnop_attrs.c
@@ -104,8 +104,9 @@ afs_CopyOutAttrs(struct vcache *avc, struct vattr *attrs)
 	/* The mount point's vnode. */
 	if (tvp) {
 	    attrs->va_nodeid =
-	      afs_calc_inum (tvp->mtpoint.Fid.Volume,
-			      tvp->mtpoint.Fid.Vnode);
+	      afs_calc_inum(tvp->mtpoint.Cell,
+			    tvp->mtpoint.Fid.Volume,
+			    tvp->mtpoint.Fid.Vnode);
 	    if (FidCmp(&afs_rootFid, &avc->f.fid) && !attrs->va_nodeid)
 		attrs->va_nodeid = 2;
 	    afs_PutVolume(tvp, READ_LOCK);
@@ -113,8 +114,9 @@ afs_CopyOutAttrs(struct vcache *avc, struct vattr *attrs)
 	    attrs->va_nodeid = 2;
     } else
 	attrs->va_nodeid = 
-	      afs_calc_inum (avc->f.fid.Fid.Volume,
-			      avc->f.fid.Fid.Vnode);
+	      afs_calc_inum(avc->f.fid.Cell,
+			    avc->f.fid.Fid.Volume,
+			    avc->f.fid.Fid.Vnode);
     attrs->va_nodeid &= 0x7fffffff;	/* Saber C hates negative inode #s! */
     attrs->va_nlink = fakedir ? 100 : avc->f.m.LinkCount;
     attrs->va_size = fakedir ? 4096 : avc->f.m.Length;
diff --git a/src/afs/afs_prototypes.h b/src/afs/afs_prototypes.h
index ee7018d..535ffc2 100644
--- a/src/afs/afs_prototypes.h
+++ b/src/afs/afs_prototypes.h
@@ -1010,7 +1010,8 @@ extern void afs_MarkUserExpired(afs_int32 pag);
 
 /* afs_util.c */
 extern afs_int32 afs_strtoi_r(const char *str, char **endptr, afs_uint32 *ret);
-extern afs_int32 afs_calc_inum (afs_int32 volume, afs_int32 vnode);
+extern afs_int32 afs_calc_inum(afs_int32 cell, afs_int32 volume,
+                               afs_int32 vnode);
 #ifndef afs_cv2string
 extern char *afs_cv2string(char *ttp, afs_uint32 aval);
 #endif
diff --git a/src/afs/afs_util.c b/src/afs/afs_util.c
index 783ebc1..426346d 100644
--- a/src/afs/afs_util.c
+++ b/src/afs/afs_util.c
@@ -370,7 +370,7 @@ afs_data_pointer_to_int32(const void *p)
 #ifdef AFS_LINUX20_ENV
 
 afs_int32
-afs_calc_inum(afs_int32 volume, afs_int32 vnode)
+afs_calc_inum(afs_int32 cell, afs_int32 volume, afs_int32 vnode)
 {
     afs_int32 ino = 0, vno = vnode;
     char digest[16];
@@ -379,6 +379,7 @@ afs_calc_inum(afs_int32 volume, afs_int32 vnode)
     if (afs_new_inum) {
 	int offset;
 	MD5_Init(&ct);
+	MD5_Update(&ct, &cell, 4);
 	MD5_Update(&ct, &volume, 4);
 	MD5_Update(&ct, &vnode, 4);
 	MD5_Final(digest, &ct);
@@ -407,7 +408,7 @@ afs_calc_inum(afs_int32 volume, afs_int32 vnode)
 #else
 
 afs_int32
-afs_calc_inum (afs_int32 volume, afs_int32 vnode)
+afs_calc_inum(afs_int32 cell, afs_int32 volume, afs_int32 vnode)
 {
     return (volume << 16) + vnode;
 }