Support the fallocate() file operation.

[zfs.git] / module / zfs / zpl_inode.c

diff --git a/module/zfs/zpl_inode.c b/module/zfs/zpl_inode.c
index 17acf37..9b55337 100644 (file)
--- a/module/zfs/zpl_inode.c
+++ b/module/zfs/zpl_inode.c
@@ -315,6 +315,42 @@ out:
        return (error);
 }
 
+static void
+zpl_truncate_range(struct inode* ip, loff_t start, loff_t end)
+{
+       cred_t *cr = CRED();
+       flock64_t bf;
+
+       ASSERT3S(start, <=, end);
+
+       /*
+        * zfs_freesp() will interpret (len == 0) as meaning "truncate until
+        * the end of the file". We don't want that.
+        */
+       if (start == end)
+               return;
+
+       crhold(cr);
+
+       bf.l_type = F_WRLCK;
+       bf.l_whence = 0;
+       bf.l_start = start;
+       bf.l_len = end - start;
+       bf.l_pid = 0;
+       zfs_space(ip, F_FREESP, &bf, FWRITE, start, cr);
+
+       crfree(cr);
+}
+
+#ifdef HAVE_INODE_FALLOCATE
+static long
+zpl_fallocate(struct inode *ip, int mode, loff_t offset, loff_t len)
+{
+       return zpl_fallocate_common(ip, mode, offset, len);
+}
+#endif /* HAVE_INODE_FALLOCATE */
+
+
 const struct inode_operations zpl_inode_operations = {
        .create         = zpl_create,
        .link           = zpl_link,
@@ -330,6 +366,10 @@ const struct inode_operations zpl_inode_operations = {
        .getxattr       = generic_getxattr,
        .removexattr    = generic_removexattr,
        .listxattr      = zpl_xattr_list,
+       .truncate_range = zpl_truncate_range,
+#ifdef HAVE_INODE_FALLOCATE
+       .fallocate      = zpl_fallocate,
+#endif /* HAVE_INODE_FALLOCATE */
 };
 
 const struct inode_operations zpl_dir_inode_operations = {
@@ -356,6 +396,10 @@ const struct inode_operations zpl_symlink_inode_operations = {
        .put_link       = zpl_put_link,
        .setattr        = zpl_setattr,
        .getattr        = zpl_getattr,
+       .setxattr       = generic_setxattr,
+       .getxattr       = generic_getxattr,
+       .removexattr    = generic_removexattr,
+       .listxattr      = zpl_xattr_list,
 };
 
 const struct inode_operations zpl_special_inode_operations = {