e2fsck/quota.c

   1 /*
   2  * quota.c --- code for handling ext4 quota inodes
   3  *
   4  */
   5
   6 #ifdef HAVE_SYS_MOUNT_H
   7 #include <sys/param.h>
   8 #include <sys/mount.h>
   9 #define MNT_FL (MS_MGC_VAL | MS_RDONLY)
  10 #endif
  11 #ifdef HAVE_SYS_STAT_H
  12 #include <sys/stat.h>
  13 #endif
  14
  15 #include "e2fsck.h"
  16 #include "problem.h"
  17 #include "quota/mkquota.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_super_block *sb = fs->super;
  23         ext2_ino_t              ino;
  24         struct ext2_inode       inode;
  25         errcode_t               retval;
  26         char                    qf_name[255];
  27
  28         if (ext2fs_read_inode(fs, from_ino, &inode))
  29                 return;
  30
  31         inode.i_links_count = 1;
  32         inode.i_mode = LINUX_S_IFREG | 0600;
  33         inode.i_flags = EXT2_IMMUTABLE_FL;
  34         if (fs->super->s_feature_incompat &
  35                         EXT3_FEATURE_INCOMPAT_EXTENTS)
  36                 inode.i_flags |= EXT4_EXTENTS_FL;
  37
  38         ext2fs_write_new_inode(fs, to_ino, &inode);
  39         /* unlink the old inode */
  40         get_qf_name(qtype, QFMT_VFS_V1, qf_name);
  41         ext2fs_unlink(fs, EXT2_ROOT_INO, qf_name, from_ino, 0);
  42         ext2fs_inode_alloc_stats(fs, from_ino, -1);
  43 }
  44
  45 void e2fsck_hide_quota(e2fsck_t ctx)
  46 {
  47         struct ext2_super_block *sb = ctx->fs->super;
  48         struct problem_context  pctx;
  49         ext2_filsys             fs = ctx->fs;
  50
  51         clear_problem_context(&pctx);
  52
  53         if ((ctx->options & E2F_OPT_READONLY) ||
  54             !(sb->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_QUOTA))
  55                 return;
  56
  57         /* We need the inode bitmap to be loaded */
  58         if (ext2fs_read_bitmaps(fs))
  59                 return;
  60
  61         if (!sb->s_usr_quota_inum && !sb->s_grp_quota_inum)
  62                 /* nothing to do */
  63                 return;
  64
  65         if (sb->s_usr_quota_inum == EXT4_USR_QUOTA_INO &&
  66             sb->s_grp_quota_inum == EXT4_GRP_QUOTA_INO)
  67                 /* nothing to do */
  68                 return;
  69
  70         if (!fix_problem(ctx, PR_0_HIDE_QUOTA, &pctx))
  71                 return;
  72
  73         if (sb->s_usr_quota_inum &&
  74             sb->s_usr_quota_inum != EXT4_USR_QUOTA_INO) {
  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         if (sb->s_grp_quota_inum &&
  81             sb->s_grp_quota_inum != EXT4_GRP_QUOTA_INO) {
  82                 move_quota_inode(fs, sb->s_grp_quota_inum, EXT4_GRP_QUOTA_INO,
  83                                  GRPQUOTA);
  84                 sb->s_grp_quota_inum = EXT4_GRP_QUOTA_INO;
  85         }
  86
  87         return;
  88 }