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 #include "quota/quotaio.h"
  19
  20 static void move_quota_inode(ext2_filsys fs, ext2_ino_t from_ino,
  21                              ext2_ino_t to_ino, int qtype)
  22 {
  23         struct ext2_inode       inode;
  24         errcode_t               retval;
  25         char                    qf_name[QUOTA_NAME_LEN];
  26
  27         /* We need the inode bitmap to be loaded */
  28         if (ext2fs_read_bitmaps(fs))
  29                 return;
  30
  31         retval = ext2fs_read_inode(fs, from_ino, &inode);
  32         if (retval) {
  33                 com_err("ext2fs_read_inode", retval, "%s",
  34                         _("in move_quota_inode"));
  35                 return;
  36         }
  37
  38         inode.i_links_count = 1;
  39         inode.i_mode = LINUX_S_IFREG | 0600;
  40         inode.i_flags = EXT2_IMMUTABLE_FL;
  41         if (fs->super->s_feature_incompat &
  42                         EXT3_FEATURE_INCOMPAT_EXTENTS)
  43                 inode.i_flags |= EXT4_EXTENTS_FL;
  44
  45         retval = ext2fs_write_new_inode(fs, to_ino, &inode);
  46         if (retval) {
  47                 com_err("ext2fs_write_new_inode", retval, "%s",
  48                         _("in move_quota_inode"));
  49                 return;
  50         }
  51
  52         /* unlink the old inode */
  53         quota_get_qf_name(qtype, QFMT_VFS_V1, qf_name);
  54         ext2fs_unlink(fs, EXT2_ROOT_INO, qf_name, from_ino, 0);
  55         ext2fs_inode_alloc_stats(fs, from_ino, -1);
  56         /* Clear out the original inode in the inode-table block. */
  57         memset(&inode, 0, sizeof(struct ext2_inode));
  58         ext2fs_write_inode(fs, from_ino, &inode);
  59 }
  60
  61 void e2fsck_hide_quota(e2fsck_t ctx)
  62 {
  63         struct ext2_super_block *sb = ctx->fs->super;
  64         struct problem_context  pctx;
  65         ext2_filsys             fs = ctx->fs;
  66
  67         clear_problem_context(&pctx);
  68
  69         if ((ctx->options & E2F_OPT_READONLY) ||
  70             !(sb->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_QUOTA))
  71                 return;
  72
  73         pctx.ino = sb->s_usr_quota_inum;
  74         if (sb->s_usr_quota_inum &&
  75             (sb->s_usr_quota_inum != EXT4_USR_QUOTA_INO) &&
  76             fix_problem(ctx, PR_0_HIDE_QUOTA, &pctx)) {
  77                 move_quota_inode(fs, sb->s_usr_quota_inum, EXT4_USR_QUOTA_INO,
  78                                  USRQUOTA);
  79                 sb->s_usr_quota_inum = EXT4_USR_QUOTA_INO;
  80         }
  81
  82         pctx.ino = sb->s_grp_quota_inum;
  83         if (sb->s_grp_quota_inum &&
  84             (sb->s_grp_quota_inum != EXT4_GRP_QUOTA_INO) &&
  85             fix_problem(ctx, PR_0_HIDE_QUOTA, &pctx)) {
  86                 move_quota_inode(fs, sb->s_grp_quota_inum, EXT4_GRP_QUOTA_INO,
  87                                  GRPQUOTA);
  88                 sb->s_grp_quota_inum = EXT4_GRP_QUOTA_INO;
  89         }
  90
  91         return;
  92 }