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_inode       inode;
  25         char                    qf_name[QUOTA_NAME_LEN];
  26
  27         if (ext2fs_read_inode(fs, from_ino, &inode))
  28                 return;
  29
  30         inode.i_links_count = 1;
  31         inode.i_mode = LINUX_S_IFREG | 0600;
  32         inode.i_flags = EXT2_IMMUTABLE_FL;
  33         if (fs->super->s_feature_incompat &
  34                         EXT3_FEATURE_INCOMPAT_EXTENTS)
  35                 inode.i_flags |= EXT4_EXTENTS_FL;
  36
  37         ext2fs_write_new_inode(fs, to_ino, &inode);
  38         /* unlink the old inode */
  39         quota_get_qf_name(qtype, QFMT_VFS_V1, qf_name);
  40         ext2fs_unlink(fs, EXT2_ROOT_INO, qf_name, from_ino, 0);
  41         ext2fs_inode_alloc_stats(fs, from_ino, -1);
  42 }
  43
  44 void e2fsck_hide_quota(e2fsck_t ctx)
  45 {
  46         struct ext2_super_block *sb = ctx->fs->super;
  47         struct problem_context  pctx;
  48         ext2_filsys             fs = ctx->fs;
  49
  50         clear_problem_context(&pctx);
  51
  52         if ((ctx->options & E2F_OPT_READONLY) ||
  53             !(sb->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_QUOTA))
  54                 return;
  55
  56         /* We need the inode bitmap to be loaded */
  57         if (ext2fs_read_bitmaps(fs))
  58                 return;
  59
  60         if (!sb->s_usr_quota_inum && !sb->s_grp_quota_inum)
  61                 /* nothing to do */
  62                 return;
  63
  64         if (sb->s_usr_quota_inum == EXT4_USR_QUOTA_INO &&
  65             sb->s_grp_quota_inum == EXT4_GRP_QUOTA_INO)
  66                 /* nothing to do */
  67                 return;
  68
  69         if (!fix_problem(ctx, PR_0_HIDE_QUOTA, &pctx))
  70                 return;
  71
  72         if (sb->s_usr_quota_inum &&
  73             sb->s_usr_quota_inum != EXT4_USR_QUOTA_INO) {
  74                 move_quota_inode(fs, sb->s_usr_quota_inum, EXT4_USR_QUOTA_INO,
  75                                  USRQUOTA);
  76                 sb->s_usr_quota_inum = EXT4_USR_QUOTA_INO;
  77         }
  78
  79         if (sb->s_grp_quota_inum &&
  80             sb->s_grp_quota_inum != EXT4_GRP_QUOTA_INO) {
  81                 move_quota_inode(fs, sb->s_grp_quota_inum, EXT4_GRP_QUOTA_INO,
  82                                  GRPQUOTA);
  83                 sb->s_grp_quota_inum = EXT4_GRP_QUOTA_INO;
  84         }
  85
  86         return;
  87 }