e2fsck/quota.c

   1 /*
   2  * quota.c --- code for handling ext4 quota inodes
   3  *
   4  */
   5
   6 #include "config.h"
   7 #ifdef HAVE_SYS_MOUNT_H
   8 #include <sys/param.h>
   9 #include <sys/mount.h>
  10 #define MNT_FL (MS_MGC_VAL | MS_RDONLY)
  11 #endif
  12 #ifdef HAVE_SYS_STAT_H
  13 #include <sys/stat.h>
  14 #endif
  15
  16 #include "e2fsck.h"
  17 #include "problem.h"
  18
  19 static void move_quota_inode(ext2_filsys fs, ext2_ino_t from_ino,
  20                              ext2_ino_t to_ino, int qtype)
  21 {
  22         struct ext2_inode       inode;
  23         errcode_t               retval;
  24         char                    qf_name[QUOTA_NAME_LEN];
  25
  26         /* We need the inode bitmap to be loaded */
  27         if (ext2fs_read_bitmaps(fs))
  28                 return;
  29
  30         retval = ext2fs_read_inode(fs, from_ino, &inode);
  31         if (retval) {
  32                 com_err("ext2fs_read_inode", retval, "%s",
  33                         _("in move_quota_inode"));
  34                 return;
  35         }
  36
  37         inode.i_links_count = 1;
  38         inode.i_mode = LINUX_S_IFREG | 0600;
  39         inode.i_flags = EXT2_IMMUTABLE_FL;
  40         if (ext2fs_has_feature_extents(fs->super))
  41                 inode.i_flags |= EXT4_EXTENTS_FL;
  42
  43         retval = ext2fs_write_new_inode(fs, to_ino, &inode);
  44         if (retval) {
  45                 com_err("ext2fs_write_new_inode", retval, "%s",
  46                         _("in move_quota_inode"));
  47                 return;
  48         }
  49
  50         /* unlink the old inode */
  51         quota_get_qf_name(qtype, QFMT_VFS_V1, qf_name);
  52         ext2fs_unlink(fs, EXT2_ROOT_INO, qf_name, from_ino, 0);
  53         ext2fs_inode_alloc_stats(fs, from_ino, -1);
  54         /* Clear out the original inode in the inode-table block. */
  55         memset(&inode, 0, sizeof(struct ext2_inode));
  56         ext2fs_write_inode(fs, from_ino, &inode);
  57 }
  58
  59 void e2fsck_hide_quota(e2fsck_t ctx)
  60 {
  61         struct ext2_super_block *sb = ctx->fs->super;
  62         struct problem_context  pctx;
  63         ext2_filsys             fs = ctx->fs;
  64
  65         clear_problem_context(&pctx);
  66
  67         if ((ctx->options & E2F_OPT_READONLY) ||
  68             !ext2fs_has_feature_quota(sb))
  69                 return;
  70
  71         pctx.ino = sb->s_usr_quota_inum;
  72         if (sb->s_usr_quota_inum &&
  73             (sb->s_usr_quota_inum != EXT4_USR_QUOTA_INO) &&
  74             fix_problem(ctx, PR_0_HIDE_QUOTA, &pctx)) {
  75                 move_quota_inode(fs, sb->s_usr_quota_inum, EXT4_USR_QUOTA_INO,
  76                                  USRQUOTA);
  77                 sb->s_usr_quota_inum = EXT4_USR_QUOTA_INO;
  78         }
  79
  80         pctx.ino = sb->s_grp_quota_inum;
  81         if (sb->s_grp_quota_inum &&
  82             (sb->s_grp_quota_inum != EXT4_GRP_QUOTA_INO) &&
  83             fix_problem(ctx, PR_0_HIDE_QUOTA, &pctx)) {
  84                 move_quota_inode(fs, sb->s_grp_quota_inum, EXT4_GRP_QUOTA_INO,
  85                                  GRPQUOTA);
  86                 sb->s_grp_quota_inum = EXT4_GRP_QUOTA_INO;
  87         }
  88
  89         return;
  90 }