[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/fs/jfs/acl.c b/ap/os/linux/linux-3.4.x/fs/jfs/acl.c
new file mode 100644
index 0000000..45559dc
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/jfs/acl.c
@@ -0,0 +1,178 @@
+/*
+ * Copyright (C) International Business Machines Corp., 2002-2004
+ * Copyright (C) Andreas Gruenbacher, 2001
+ * Copyright (C) Linus Torvalds, 1991, 1992
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/posix_acl_xattr.h>
+#include "jfs_incore.h"
+#include "jfs_txnmgr.h"
+#include "jfs_xattr.h"
+#include "jfs_acl.h"
+
+struct posix_acl *jfs_get_acl(struct inode *inode, int type)
+{
+ struct posix_acl *acl;
+ char *ea_name;
+ int size;
+ char *value = NULL;
+
+ acl = get_cached_acl(inode, type);
+ if (acl != ACL_NOT_CACHED)
+ return acl;
+
+ switch(type) {
+ case ACL_TYPE_ACCESS:
+ ea_name = POSIX_ACL_XATTR_ACCESS;
+ break;
+ case ACL_TYPE_DEFAULT:
+ ea_name = POSIX_ACL_XATTR_DEFAULT;
+ break;
+ default:
+ return ERR_PTR(-EINVAL);
+ }
+
+ size = __jfs_getxattr(inode, ea_name, NULL, 0);
+
+ if (size > 0) {
+ value = kmalloc(size, GFP_KERNEL);
+ if (!value)
+ return ERR_PTR(-ENOMEM);
+ size = __jfs_getxattr(inode, ea_name, value, size);
+ }
+
+ if (size < 0) {
+ if (size == -ENODATA)
+ acl = NULL;
+ else
+ acl = ERR_PTR(size);
+ } else {
+ acl = posix_acl_from_xattr(value, size);
+ }
+ kfree(value);
+ if (!IS_ERR(acl))
+ set_cached_acl(inode, type, acl);
+ return acl;
+}
+
+static int jfs_set_acl(tid_t tid, struct inode *inode, int type,
+ struct posix_acl *acl)
+{
+ char *ea_name;
+ int rc;
+ int size = 0;
+ char *value = NULL;
+
+ if (S_ISLNK(inode->i_mode))
+ return -EOPNOTSUPP;
+
+ switch(type) {
+ case ACL_TYPE_ACCESS:
+ ea_name = POSIX_ACL_XATTR_ACCESS;
+ break;
+ case ACL_TYPE_DEFAULT:
+ ea_name = POSIX_ACL_XATTR_DEFAULT;
+ if (!S_ISDIR(inode->i_mode))
+ return acl ? -EACCES : 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (acl) {
+ size = posix_acl_xattr_size(acl->a_count);
+ value = kmalloc(size, GFP_KERNEL);
+ if (!value)
+ return -ENOMEM;
+ rc = posix_acl_to_xattr(acl, value, size);
+ if (rc < 0)
+ goto out;
+ }
+ rc = __jfs_setxattr(tid, inode, ea_name, value, size, 0);
+out:
+ kfree(value);
+
+ if (!rc)
+ set_cached_acl(inode, type, acl);
+
+ return rc;
+}
+
+int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
+{
+ struct posix_acl *acl = NULL;
+ int rc = 0;
+
+ if (S_ISLNK(inode->i_mode))
+ return 0;
+
+ acl = jfs_get_acl(dir, ACL_TYPE_DEFAULT);
+ if (IS_ERR(acl))
+ return PTR_ERR(acl);
+
+ if (acl) {
+ if (S_ISDIR(inode->i_mode)) {
+ rc = jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, acl);
+ if (rc)
+ goto cleanup;
+ }
+ rc = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
+ if (rc < 0)
+ goto cleanup; /* posix_acl_release(NULL) is no-op */
+ if (rc > 0)
+ rc = jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl);
+cleanup:
+ posix_acl_release(acl);
+ } else
+ inode->i_mode &= ~current_umask();
+
+ JFS_IP(inode)->mode2 = (JFS_IP(inode)->mode2 & 0xffff0000) |
+ inode->i_mode;
+
+ return rc;
+}
+
+int jfs_acl_chmod(struct inode *inode)
+{
+ struct posix_acl *acl;
+ int rc;
+ tid_t tid;
+
+ if (S_ISLNK(inode->i_mode))
+ return -EOPNOTSUPP;
+
+ acl = jfs_get_acl(inode, ACL_TYPE_ACCESS);
+ if (IS_ERR(acl) || !acl)
+ return PTR_ERR(acl);
+
+ rc = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
+ if (rc)
+ return rc;
+
+ tid = txBegin(inode->i_sb, 0);
+ mutex_lock(&JFS_IP(inode)->commit_mutex);
+ rc = jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl);
+ if (!rc)
+ rc = txCommit(tid, 1, &inode, 0);
+ txEnd(tid);
+ mutex_unlock(&JFS_IP(inode)->commit_mutex);
+
+ posix_acl_release(acl);
+ return rc;
+}