tune2fs: preserve old limits when turn on quota feature

When turn on quota by tune2fs, if the old quota file exist, the quota
usage should be recomputed but the old limits should be preserved.

Signed-off-by: Niu Yawei <niu@whamcloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/misc/tune2fs.c b/misc/tune2fs.c
index 8bcf667..74a0489 100644 (file)
--- a/misc/tune2fs.c
+++ b/misc/tune2fs.c
@@ -700,7 +700,6 @@ err:
 void handle_quota_options(ext2_filsys fs)
 {
        quota_ctx_t qctx;
-       errcode_t retval;
        ext2_ino_t qf_ino;
 
        if (!usrquota && !grpquota)
@@ -712,15 +711,33 @@ void handle_quota_options(ext2_filsys fs)
        if (usrquota == QOPT_ENABLE || grpquota == QOPT_ENABLE)
                quota_compute_usage(qctx);
 
-       if (usrquota == QOPT_ENABLE)
-               quota_write_inode(qctx, USRQUOTA);
-       else if (usrquota == QOPT_DISABLE)
+       if (usrquota == QOPT_ENABLE && !fs->super->s_usr_quota_inum) {
+               if ((qf_ino = quota_file_exists(fs, USRQUOTA,
+                                               QFMT_VFS_V1)) > 0) {
+                       if (quota_update_inode(qctx, qf_ino, USRQUOTA) == 0)
+                               quota_set_sb_inum(fs, qf_ino, USRQUOTA);
+                       else
+                               quota_write_inode(qctx, USRQUOTA);
+               } else {
+                       quota_write_inode(qctx, USRQUOTA);
+               }
+       } else if (usrquota == QOPT_DISABLE) {
                quota_remove_inode(fs, USRQUOTA);
+       }
 
-       if (grpquota == QOPT_ENABLE)
-               quota_write_inode(qctx, GRPQUOTA);
-       else if (grpquota == QOPT_DISABLE)
+       if (grpquota == QOPT_ENABLE && !fs->super->s_grp_quota_inum) {
+               if ((qf_ino = quota_file_exists(fs, GRPQUOTA,
+                                               QFMT_VFS_V1)) > 0) {
+                       if (quota_update_inode(qctx, qf_ino, GRPQUOTA) == 0)
+                               quota_set_sb_inum(fs, qf_ino, GRPQUOTA);
+                       else
+                               quota_write_inode(qctx, GRPQUOTA);
+               } else {
+                       quota_write_inode(qctx, GRPQUOTA);
+               }
+       } else if (grpquota == QOPT_DISABLE) {
                quota_remove_inode(fs, GRPQUOTA);
+       }
 
        quota_release_context(&qctx);