LU-527 Update RHEL6 kernel to 2.6.32-131.6.1 security update

[fs/lustre-release.git] / lustre / llite / xattr.c

diff --git a/lustre/llite/xattr.c b/lustre/llite/xattr.c
index b8bb7f1..94b48bf 100644 (file)
--- a/lustre/llite/xattr.c
+++ b/lustre/llite/xattr.c
@@ -26,7 +26,7 @@
  * GPL HEADER END
  */
 /*
- * Copyright  2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  */
 /*
@@ -129,6 +129,11 @@ int ll_setxattr_common(struct inode *inode, const char *name,
             (xattr_type == XATTR_LUSTRE_T && strcmp(name, "lustre.lov") == 0))
                 RETURN(0);
 
+        /* b15587: ignore security.capability xattr for now */
+        if ((xattr_type == XATTR_SECURITY_T &&
+            strcmp(name, "security.capability") == 0))
+                RETURN(0);
+
 #ifdef CONFIG_FS_POSIX_ACL
         if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
             (xattr_type == XATTR_ACL_ACCESS_T ||
@@ -222,10 +227,10 @@ int ll_setxattr(struct dentry *dentry, const char *name,
                 /* Attributes that are saved via getxattr will always have
                  * the stripe_offset as 0.  Instead, the MDS should be
                  * allowed to pick the starting OST index.   b=17846 */
-                if (lump->lmm_stripe_offset == 0)
+                if (lump != NULL && lump->lmm_stripe_offset == 0)
                         lump->lmm_stripe_offset = -1;
 
-                if (S_ISREG(inode->i_mode)) {
+                if (lump != NULL && S_ISREG(inode->i_mode)) {
                         struct file f;
                         int flags = FMODE_WRITE;
 
@@ -293,6 +298,11 @@ int ll_getxattr_common(struct inode *inode, const char *name,
         if (rc)
                 RETURN(rc);
 
+        /* b15587: ignore security.capability xattr for now */
+        if ((xattr_type == XATTR_SECURITY_T &&
+            strcmp(name, "security.capability") == 0))
+                RETURN(-ENODATA);
+
 #ifdef CONFIG_FS_POSIX_ACL
         if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
             (xattr_type == XATTR_ACL_ACCESS_T ||
@@ -305,21 +315,19 @@ int ll_getxattr_common(struct inode *inode, const char *name,
                     rce->rce_ops != RMT_RGETFACL))
                         RETURN(-EOPNOTSUPP);
         }
-#endif
 
         /* posix acl is under protection of LOOKUP lock. when calling to this,
          * we just have path resolution to the target inode, so we have great
          * chance that cached ACL is uptodate.
          */
-#ifdef CONFIG_FS_POSIX_ACL
         if (xattr_type == XATTR_ACL_ACCESS_T &&
             !(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
                 struct ll_inode_info *lli = ll_i2info(inode);
                 struct posix_acl *acl;
 
-                spin_lock(&lli->lli_lock);
+                cfs_spin_lock(&lli->lli_lock);
                 acl = posix_acl_dup(lli->lli_posix_acl);
-                spin_unlock(&lli->lli_lock);
+                cfs_spin_unlock(&lli->lli_lock);
 
                 if (!acl)
                         RETURN(-ENODATA);
@@ -360,6 +368,9 @@ do_getxattr:
                 GOTO(out, rc = -ERANGE);
         }
 
+        if (body->eadatasize == 0)
+                GOTO(out, rc = -ENODATA);
+
         /* do not need swab xattr data */
         xdata = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA,
                                              body->eadatasize);
@@ -382,13 +393,15 @@ do_getxattr:
                         GOTO(out, rc);
                 }
         }
-
-        if (xattr_type == XATTR_ACL_ACCESS_T && !body->eadatasize)
-                GOTO(out, rc = -ENODATA);
 #endif
-        LASSERT(buffer);
-        memcpy(buffer, xdata, body->eadatasize);
-        rc = body->eadatasize;
+
+        if (body->eadatasize == 0) {
+                rc = -ENODATA;
+        } else {
+                LASSERT(buffer);
+                memcpy(buffer, xdata, body->eadatasize);
+                rc = body->eadatasize;
+        }
         EXIT;
 out:
         ptlrpc_req_finished(req);
@@ -419,20 +432,41 @@ ssize_t ll_getxattr(struct dentry *dentry, const char *name,
                 struct ptlrpc_request *request = NULL;
                 int rc = 0, lmmsize = 0;
 
-                if (S_ISREG(inode->i_mode)) {
-                        rc = ll_lov_getstripe_ea_info(dentry->d_parent->d_inode,
-                                                      dentry->d_name.name, &lmm,
+                if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
+                        return -ENODATA;
+
+                if (size == 0 && S_ISDIR(inode->i_mode)) {
+                        /* XXX directory EA is fix for now, optimize to save
+                         * RPC transfer */
+                        GOTO(out, rc = sizeof(struct lov_user_md));
+                }
+
+                if (!ll_i2info(inode)->lli_smd) {
+                        if (S_ISDIR(inode->i_mode)) {
+                                rc = ll_dir_getstripe(inode, &lmm,
                                                       &lmmsize, &request);
-                } else if (S_ISDIR(inode->i_mode)) {
-                        rc = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
+                        } else {
+                                rc = -ENODATA;
+                        }
                 } else {
-                        rc = -ENODATA;
+                        /* LSM is present already after lookup/getattr call.
+                         * we need to grab layout lock once it is implemented */
+                        rc = obd_packmd(ll_i2dtexp(inode), &lmm,
+                                        ll_i2info(inode)->lli_smd);
+                        lmmsize = rc;
                 }
 
                 if (rc < 0)
                        GOTO(out, rc);
-                if (size == 0)
-                       GOTO(out, rc = lmmsize);
+
+                if (size == 0) {
+                        /* used to call ll_get_max_mdsize() forward to get
+                         * the maximum buffer size, while some apps (such as
+                         * rsync 3.0.x) care much about the exact xattr value
+                         * size */
+                        rc = lmmsize;
+                        GOTO(out, rc);
+                }
 
                 if (size < lmmsize) {
                         CERROR("server bug: replied size %d > %d for %s (%s)\n",
@@ -445,7 +479,10 @@ ssize_t ll_getxattr(struct dentry *dentry, const char *name,
 
                 rc = lmmsize;
 out:
-                ptlrpc_req_finished(request);
+                if (request)
+                        ptlrpc_req_finished(request);
+                else if (lmm)
+                        obd_free_diskmd(ll_i2dtexp(inode), &lmm);
                 return(rc);
         }
 
@@ -468,6 +505,8 @@ ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size)
         ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LISTXATTR, 1);
 
         rc = ll_getxattr_common(inode, NULL, buffer, size, OBD_MD_FLXATTRLS);
+        if (rc < 0)
+                GOTO(out, rc);
 
         if (S_ISREG(inode->i_mode)) {
                 struct ll_inode_info *lli = ll_i2info(inode);
@@ -481,7 +520,7 @@ ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size)
 
         if (rc2 < 0) {
                 GOTO(out, rc2 = 0);
-        } else {
+        } else if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) {
                 const int prefix_len = sizeof(XATTR_LUSTRE_PREFIX) - 1;
                 const size_t name_len   = sizeof("lov") - 1;
                 const size_t total_len  = prefix_len + name_len + 1;