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/mkquota.h"
  19 #include "quota/quotaio.h"
  20
  21 static void move_quota_inode(ext2_filsys fs, ext2_ino_t from_ino,
  22                              ext2_ino_t to_ino, int qtype)
  23 {
  24         struct ext2_super_block *sb = fs->super;
  25         ext2_ino_t              ino;
  26         struct ext2_inode       inode;
  27         errcode_t               retval;
  28         char                    qf_name[QUOTA_NAME_LEN];
  29
  30         if (ext2fs_read_inode(fs, from_ino, &inode))
  31                 return;
  32
  33         inode.i_links_count = 1;
  34         inode.i_mode = LINUX_S_IFREG | 0600;
  35         inode.i_flags = EXT2_IMMUTABLE_FL;
  36         if (fs->super->s_feature_incompat &
  37                         EXT3_FEATURE_INCOMPAT_EXTENTS)
  38                 inode.i_flags |= EXT4_EXTENTS_FL;
  39
  40         ext2fs_write_new_inode(fs, to_ino, &inode);
  41         /* unlink the old inode */
  42         quota_get_qf_name(qtype, QFMT_VFS_V1, qf_name);
  43         ext2fs_unlink(fs, EXT2_ROOT_INO, qf_name, from_ino, 0);
  44         ext2fs_inode_alloc_stats(fs, from_ino, -1);
  45 }
  46
  47 void e2fsck_hide_quota(e2fsck_t ctx)
  48 {
  49         struct ext2_super_block *sb = ctx->fs->super;
  50         struct problem_context  pctx;
  51         ext2_filsys             fs = ctx->fs;
  52
  53         clear_problem_context(&pctx);
  54
  55         if ((ctx->options & E2F_OPT_READONLY) ||
  56             !(sb->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_QUOTA))
  57                 return;
  58
  59         /* We need the inode bitmap to be loaded */
  60         if (ext2fs_read_bitmaps(fs))
  61                 return;
  62
  63         if (!sb->s_usr_quota_inum && !sb->s_grp_quota_inum)
  64                 /* nothing to do */
  65                 return;
  66
  67         if (sb->s_usr_quota_inum == EXT4_USR_QUOTA_INO &&
  68             sb->s_grp_quota_inum == EXT4_GRP_QUOTA_INO)
  69                 /* nothing to do */
  70                 return;
  71
  72         if (!fix_problem(ctx, PR_0_HIDE_QUOTA, &pctx))
  73                 return;
  74
  75         if (sb->s_usr_quota_inum &&
  76             sb->s_usr_quota_inum != EXT4_USR_QUOTA_INO) {
  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         if (sb->s_grp_quota_inum &&
  83             sb->s_grp_quota_inum != EXT4_GRP_QUOTA_INO) {
  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 }