Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / hfs / attr.c

diff --git a/kernel/fs/hfs/attr.c b/kernel/fs/hfs/attr.c
new file mode 100644 (file)
index 0000000..8d931b1
--- /dev/null
+++ b/kernel/fs/hfs/attr.c
@@ -0,0 +1,121 @@
+/*
+ *  linux/fs/hfs/attr.c
+ *
+ * (C) 2003 Ardis Technologies <roman@ardistech.com>
+ *
+ * Export hfs data via xattr
+ */
+
+
+#include <linux/fs.h>
+#include <linux/xattr.h>
+
+#include "hfs_fs.h"
+#include "btree.h"
+
+int hfs_setxattr(struct dentry *dentry, const char *name,
+                const void *value, size_t size, int flags)
+{
+       struct inode *inode = d_inode(dentry);
+       struct hfs_find_data fd;
+       hfs_cat_rec rec;
+       struct hfs_cat_file *file;
+       int res;
+
+       if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode))
+               return -EOPNOTSUPP;
+
+       res = hfs_find_init(HFS_SB(inode->i_sb)->cat_tree, &fd);
+       if (res)
+               return res;
+       fd.search_key->cat = HFS_I(inode)->cat_key;
+       res = hfs_brec_find(&fd);
+       if (res)
+               goto out;
+       hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
+                       sizeof(struct hfs_cat_file));
+       file = &rec.file;
+
+       if (!strcmp(name, "hfs.type")) {
+               if (size == 4)
+                       memcpy(&file->UsrWds.fdType, value, 4);
+               else
+                       res = -ERANGE;
+       } else if (!strcmp(name, "hfs.creator")) {
+               if (size == 4)
+                       memcpy(&file->UsrWds.fdCreator, value, 4);
+               else
+                       res = -ERANGE;
+       } else
+               res = -EOPNOTSUPP;
+       if (!res)
+               hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
+                               sizeof(struct hfs_cat_file));
+out:
+       hfs_find_exit(&fd);
+       return res;
+}
+
+ssize_t hfs_getxattr(struct dentry *dentry, const char *name,
+                        void *value, size_t size)
+{
+       struct inode *inode = d_inode(dentry);
+       struct hfs_find_data fd;
+       hfs_cat_rec rec;
+       struct hfs_cat_file *file;
+       ssize_t res = 0;
+
+       if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode))
+               return -EOPNOTSUPP;
+
+       if (size) {
+               res = hfs_find_init(HFS_SB(inode->i_sb)->cat_tree, &fd);
+               if (res)
+                       return res;
+               fd.search_key->cat = HFS_I(inode)->cat_key;
+               res = hfs_brec_find(&fd);
+               if (res)
+                       goto out;
+               hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
+                               sizeof(struct hfs_cat_file));
+       }
+       file = &rec.file;
+
+       if (!strcmp(name, "hfs.type")) {
+               if (size >= 4) {
+                       memcpy(value, &file->UsrWds.fdType, 4);
+                       res = 4;
+               } else
+                       res = size ? -ERANGE : 4;
+       } else if (!strcmp(name, "hfs.creator")) {
+               if (size >= 4) {
+                       memcpy(value, &file->UsrWds.fdCreator, 4);
+                       res = 4;
+               } else
+                       res = size ? -ERANGE : 4;
+       } else
+               res = -ENODATA;
+out:
+       if (size)
+               hfs_find_exit(&fd);
+       return res;
+}
+
+#define HFS_ATTRLIST_SIZE (sizeof("hfs.creator")+sizeof("hfs.type"))
+
+ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
+{
+       struct inode *inode = d_inode(dentry);
+
+       if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode))
+               return -EOPNOTSUPP;
+
+       if (!buffer || !size)
+               return HFS_ATTRLIST_SIZE;
+       if (size < HFS_ATTRLIST_SIZE)
+               return -ERANGE;
+       strcpy(buffer, "hfs.type");
+       strcpy(buffer + sizeof("hfs.type"), "hfs.creator");
+
+       return HFS_ATTRLIST_SIZE;
+}