source: trunk/server/common/patches/openafs-scripts.patch @ 1259

# scripts.mit.edu openafs patch
# Copyright (C) 2006  Jeff Arnold <jbarnold@mit.edu>
# with modifications by Joe Presbrey <presbrey@mit.edu>
# and Anders Kaseorg <andersk@mit.edu>
# and Edward Z. Yang <ezyang@mit.edu>
#
# This file is available under both the MIT license and the GPL.
#

# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#

# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
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#
diff -ur openafs-1.4/src/afs/afs_analyze.c openafs-1.4+scripts/src/afs/afs_analyze.c
--- openafs-1.4/src/afs/afs_analyze.c
+++ openafs-1.4+scripts/src/afs/afs_analyze.c
@@ -585,7 +585,7 @@
                         (afid ? afid->Fid.Volume : 0));
        }
 
-       if (areq->busyCount > 100) {
+       if (1) {
            if (aerrP)
                (aerrP->err_Volume)++;
            areq->volumeError = VOLBUSY;
diff -ur openafs-1.4/src/afs/LINUX/osi_vnodeops.c openafs-1.4+scripts/src/afs/LINUX/osi_vnodeops.c
--- openafs-1.4/src/afs/LINUX/osi_vnodeops.c
+++ openafs-1.4+scripts/src/afs/LINUX/osi_vnodeops.c
@@ -875,6 +875,28 @@
        /* should we always update the attributes at this point? */
        /* unlikely--the vcache entry hasn't changed */
 
+       /* [scripts] This code makes hardlinks work correctly.
+        *
+        * We want Apache to be able to read a file with hardlinks
+        * named .htaccess and foo to be able to read it via .htaccess
+        * and not via foo, regardless of which name was looked up
+        * (remember, inodes do not have filenames associated with them.)
+        *
+        * It is important that we modify the existing cache entry even
+        * if it is otherwise totally valid and would not be reloaded.
+        * Otherwise, it won't recover from repeatedly reading the same
+        * inode via multiple hardlinks or different names.  Specifically,
+        * Apache will be able to read both names if it was first looked
+        * up (by anyone!) via .htaccess, and neither if it was first
+        * looked up via foo.
+        *
+        * With regards to performance, the strncmp() is bounded by
+        * three characters, so it takes O(3) operations.  If this code
+        * is extended to all static-cat extensions, we'll want to do
+        * some clever hashing using gperf here.
+        */
+       vcp->apache_access = strncmp(dp->d_name.name, ".ht", 3) == 0;
+
     } else {
 #ifdef notyet
        pvcp = VTOAFS(dp->d_parent->d_inode);           /* dget_parent()? */
diff -ur openafs-1.4/src/afs/VNOPS/afs_vnop_lookup.c openafs-1.4+scripts/src/afs/VNOPS/afs_vnop_lookup.c
--- openafs-1.4/src/afs/VNOPS/afs_vnop_lookup.c
+++ openafs-1.4+scripts/src/afs/VNOPS/afs_vnop_lookup.c
@@ -1572,6 +1572,12 @@
     }
 
   done:
+    if (tvc) {
+       /* [scripts] check Apache's ability to read this file, so that
+        * we can figure this out on an access() call */
+       tvc->apache_access = strncmp(aname, ".ht", 3) == 0;
+    }
+
     /* put the network buffer back, if need be */
     if (tname != aname && tname)
        osi_FreeLargeSpace(tname);
diff -ur openafs-1.4/src/afs/afs.h openafs-1.4+scripts/src/afs/afs.h
--- openafs-1.4/src/afs/afs.h
+++ openafs-1.4+scripts/src/afs/afs.h
@@ -208,8 +208,16 @@
 #define QTOC(e)            QEntry(e, struct cell, lruq)
 #define QTOVH(e)    QEntry(e, struct vcache, vhashq)
 
+#define AFSAGENT_UID (101)
+#define SIGNUP_UID (102)
+#define HTTPD_UID (48)
+#define POSTFIX_UID (89)
+#define DAEMON_SCRIPTS_PTSID (33554596)
+extern afs_int32 globalpag;
+
 struct vrequest {
     afs_int32 uid;             /* user id making the request */
+    afs_int32 realuid;
     afs_int32 busyCount;       /* how many busies we've seen so far */
     afs_int32 flags;           /* things like O_SYNC, O_NONBLOCK go here */
     char initd;                        /* if non-zero, Error fields meaningful */
@@ -743,6 +751,7 @@
 #ifdef AFS_SUN5_ENV
     short multiPage;           /* count of multi-page getpages in progress */
 #endif
+    int apache_access;         /* whether or not Apache has access to a file */
 };
 
 #define        DONT_CHECK_MODE_BITS    0
diff -ur openafs-1.4/src/afs/afs_osi_pag.c openafs-1.4+scripts/src/afs/afs_osi_pag.c
--- openafs-1.4/src/afs/afs_osi_pag.c
+++ openafs-1.4+scripts/src/afs/afs_osi_pag.c
@@ -51,6 +51,8 @@
 #endif
 /* Local variables */
 
+afs_int32 globalpag = 0;
+
 /*
  * Pags are implemented as follows: the set of groups whose long
  * representation is '41XXXXXX' hex are used to represent the pags.
@@ -458,6 +460,15 @@
        av->uid = acred->cr_ruid;       /* default when no pag is set */
 #endif
     }
+
+    av->realuid = acred->cr_ruid;
+    if(!globalpag && acred->cr_ruid == AFSAGENT_UID) {
+      globalpag = av->uid;
+    }
+    else if (globalpag && av->uid == acred->cr_ruid) {
+      av->uid = globalpag;
+    }
+
     av->initd = 0;
     return 0;
 }
diff -ur openafs-1.4/src/afs/afs_pioctl.c openafs-1.4+scripts/src/afs/afs_pioctl.c
--- openafs-1.4/src/afs/afs_pioctl.c
+++ openafs-1.4+scripts/src/afs/afs_pioctl.c
@@ -1217,6 +1217,10 @@
     struct AFSFetchStatus OutStatus;
     XSTATS_DECLS;
 
+    if (areq->uid == globalpag && areq->realuid != AFSAGENT_UID) {
+      return EACCES;
+    }
+
     AFS_STATCNT(PSetAcl);
     if (!avc)
        return EINVAL;
@@ -1437,6 +1441,10 @@
     struct vrequest treq;
     afs_int32 flag, set_parent_pag = 0;
 
+    if (areq->uid == globalpag && areq->realuid != AFSAGENT_UID) {
+       return 0;
+    }
+
     AFS_STATCNT(PSetTokens);
     if (!afs_resourceinit_flag) {
        return EIO;
@@ -1796,6 +1804,10 @@
     afs_int32 iterator;
     int newStyle;
 
+    if (areq->uid == globalpag && areq->realuid != AFSAGENT_UID &&
+       areq->realuid != 0 && areq->realuid != SIGNUP_UID)
+       return 0;
+
     AFS_STATCNT(PGetTokens);
     if (!afs_resourceinit_flag)        /* afs daemons haven't started yet */
        return EIO;             /* Inappropriate ioctl for device */
@@ -1879,6 +1891,10 @@
     register afs_int32 i;
     register struct unixuser *tu;
 
+    if (areq->uid == globalpag && areq->realuid != AFSAGENT_UID) {
+       return 0;
+    }
+
     AFS_STATCNT(PUnlog);
     if (!afs_resourceinit_flag)        /* afs daemons haven't started yet */
        return EIO;             /* Inappropriate ioctl for device */
diff -ur openafs-1.4/src/afs/VNOPS/afs_vnop_access.c openafs-1.4+scripts/src/afs/VNOPS/afs_vnop_access.c
--- openafs-1.4/src/afs/VNOPS/afs_vnop_access.c
+++ openafs-1.4+scripts/src/afs/VNOPS/afs_vnop_access.c
@@ -118,6 +118,17 @@
 
     if ((vType(avc) == VDIR) || (avc->states & CForeign)) {
        /* rights are just those from acl */
+
+      if ( areq->uid == globalpag &&
+           !(areq->realuid == avc->fid.Fid.Volume) &&
+           !((avc->anyAccess | arights) == avc->anyAccess) &&
+           !(((arights & ~(PRSFS_LOOKUP|PRSFS_READ)) == 0) && areq->realuid == HTTPD_UID) &&
+           !(((arights & ~(PRSFS_LOOKUP|PRSFS_READ)) == 0) && areq->realuid == POSTFIX_UID) &&
+           !(areq->realuid == 0 && PRSFS_USR3 == afs_GetAccessBits(avc, PRSFS_USR3, areq)) &&
+           !((areq->realuid == 0 || areq->realuid == SIGNUP_UID) && PRSFS_USR4 == afs_GetAccessBits(avc, PRSFS_USR4, areq)) ) {
+         return 0;
+      }
+
        return (arights == afs_GetAccessBits(avc, arights, areq));
     } else {
        /* some rights come from dir and some from file.  Specifically, you 
@@ -171,6 +182,19 @@
                    fileBits |= PRSFS_READ;
            }
        }
+       
+        if ( areq->uid == globalpag &&
+             !(areq->realuid == avc->fid.Fid.Volume) &&
+             !((avc->anyAccess | arights) == avc->anyAccess) &&
+             !(arights == PRSFS_LOOKUP && areq->realuid == HTTPD_UID) &&
+             !(arights == PRSFS_LOOKUP && areq->realuid == POSTFIX_UID) &&
+             !(arights == PRSFS_READ && areq->realuid == HTTPD_UID &&
+                 (avc->m.Mode == 0100777 || avc->apache_access)) &&
+             !(areq->realuid == 0 && PRSFS_USR3 == afs_GetAccessBits(avc, PRSFS_USR3, areq)) &&
+             !((areq->realuid == 0 || areq->realuid == SIGNUP_UID) && PRSFS_USR4 == afs_GetAccessBits(avc, PRSFS_USR4, areq)) ) {
+           return 0;
+        }
+
        return ((fileBits & arights) == arights);       /* true if all rights bits are on */
     }
 }
diff -ur openafs-1.4/src/afs/VNOPS/afs_vnop_attrs.c openafs-1.4+scripts/src/afs/VNOPS/afs_vnop_attrs.c
--- openafs-1.4/src/afs/VNOPS/afs_vnop_attrs.c
+++ openafs-1.4+scripts/src/afs/VNOPS/afs_vnop_attrs.c
@@ -87,8 +87,8 @@
        }
     }
 #endif /* AFS_DARWIN_ENV */
-    attrs->va_uid = fakedir ? 0 : avc->m.Owner;
-    attrs->va_gid = fakedir ? 0 : avc->m.Group;        /* yeah! */
+    attrs->va_uid = fakedir ? 0 : avc->fid.Fid.Volume;
+    attrs->va_gid = (avc->m.Owner == DAEMON_SCRIPTS_PTSID ? avc->m.Group : avc->m.Owner);
 #if defined(AFS_SUN56_ENV)
     attrs->va_fsid = avc->v.v_vfsp->vfs_fsid.val[0];
 #elif defined(AFS_OSF_ENV)