[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/generic_acl.c b/ap/os/linux/linux-3.4.x/fs/generic_acl.c
new file mode 100644
index 0000000..d0dddac
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/generic_acl.c
@@ -0,0 +1,184 @@
+/*
+ * (C) 2005 Andreas Gruenbacher <agruen@suse.de>
+ *
+ * This file is released under the GPL.
+ *
+ * Generic ACL support for in-memory filesystems.
+ */
+
+#include <linux/sched.h>
+#include <linux/gfp.h>
+#include <linux/fs.h>
+#include <linux/generic_acl.h>
+#include <linux/posix_acl.h>
+#include <linux/posix_acl_xattr.h>
+
+
+static size_t
+generic_acl_list(struct dentry *dentry, char *list, size_t list_size,
+ const char *name, size_t name_len, int type)
+{
+ struct posix_acl *acl;
+ const char *xname;
+ size_t size;
+
+ acl = get_cached_acl(dentry->d_inode, type);
+ if (!acl)
+ return 0;
+ posix_acl_release(acl);
+
+ switch (type) {
+ case ACL_TYPE_ACCESS:
+ xname = POSIX_ACL_XATTR_ACCESS;
+ break;
+ case ACL_TYPE_DEFAULT:
+ xname = POSIX_ACL_XATTR_DEFAULT;
+ break;
+ default:
+ return 0;
+ }
+ size = strlen(xname) + 1;
+ if (list && size <= list_size)
+ memcpy(list, xname, size);
+ return size;
+}
+
+static int
+generic_acl_get(struct dentry *dentry, const char *name, void *buffer,
+ size_t size, int type)
+{
+ struct posix_acl *acl;
+ int error;
+
+ if (strcmp(name, "") != 0)
+ return -EINVAL;
+
+ acl = get_cached_acl(dentry->d_inode, type);
+ if (!acl)
+ return -ENODATA;
+ error = posix_acl_to_xattr(acl, buffer, size);
+ posix_acl_release(acl);
+
+ return error;
+}
+
+static int
+generic_acl_set(struct dentry *dentry, const char *name, const void *value,
+ size_t size, int flags, int type)
+{
+ struct inode *inode = dentry->d_inode;
+ struct posix_acl *acl = NULL;
+ int error;
+
+ if (strcmp(name, "") != 0)
+ return -EINVAL;
+ if (S_ISLNK(inode->i_mode))
+ return -EOPNOTSUPP;
+ if (!inode_owner_or_capable(inode))
+ return -EPERM;
+ if (value) {
+ acl = posix_acl_from_xattr(value, size);
+ if (IS_ERR(acl))
+ return PTR_ERR(acl);
+ }
+ if (acl) {
+ error = posix_acl_valid(acl);
+ if (error)
+ goto failed;
+ switch (type) {
+ case ACL_TYPE_ACCESS:
+ error = posix_acl_equiv_mode(acl, &inode->i_mode);
+ if (error < 0)
+ goto failed;
+ inode->i_ctime = CURRENT_TIME;
+ if (error == 0) {
+ posix_acl_release(acl);
+ acl = NULL;
+ }
+ break;
+ case ACL_TYPE_DEFAULT:
+ if (!S_ISDIR(inode->i_mode)) {
+ error = -EINVAL;
+ goto failed;
+ }
+ break;
+ }
+ }
+ set_cached_acl(inode, type, acl);
+ error = 0;
+failed:
+ posix_acl_release(acl);
+ return error;
+}
+
+/**
+ * generic_acl_init - Take care of acl inheritance at @inode create time
+ *
+ * Files created inside a directory with a default ACL inherit the
+ * directory's default ACL.
+ */
+int
+generic_acl_init(struct inode *inode, struct inode *dir)
+{
+ struct posix_acl *acl = NULL;
+ int error;
+
+ if (!S_ISLNK(inode->i_mode))
+ acl = get_cached_acl(dir, ACL_TYPE_DEFAULT);
+ if (acl) {
+ if (S_ISDIR(inode->i_mode))
+ set_cached_acl(inode, ACL_TYPE_DEFAULT, acl);
+ error = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
+ if (error < 0)
+ return error;
+ if (error > 0)
+ set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
+ } else {
+ inode->i_mode &= ~current_umask();
+ }
+ error = 0;
+
+ posix_acl_release(acl);
+ return error;
+}
+
+/**
+ * generic_acl_chmod - change the access acl of @inode upon chmod()
+ *
+ * A chmod also changes the permissions of the owner, group/mask, and
+ * other ACL entries.
+ */
+int
+generic_acl_chmod(struct inode *inode)
+{
+ struct posix_acl *acl;
+ int error = 0;
+
+ if (S_ISLNK(inode->i_mode))
+ return -EOPNOTSUPP;
+ acl = get_cached_acl(inode, ACL_TYPE_ACCESS);
+ if (acl) {
+ error = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
+ if (error)
+ return error;
+ set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
+ posix_acl_release(acl);
+ }
+ return error;
+}
+
+const struct xattr_handler generic_acl_access_handler = {
+ .prefix = POSIX_ACL_XATTR_ACCESS,
+ .flags = ACL_TYPE_ACCESS,
+ .list = generic_acl_list,
+ .get = generic_acl_get,
+ .set = generic_acl_set,
+};
+
+const struct xattr_handler generic_acl_default_handler = {
+ .prefix = POSIX_ACL_XATTR_DEFAULT,
+ .flags = ACL_TYPE_DEFAULT,
+ .list = generic_acl_list,
+ .get = generic_acl_get,
+ .set = generic_acl_set,
+};