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 #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         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         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         /* Clear out the original inode in the inode-table block. */
  46         memset(&inode, 0, sizeof(struct ext2_inode));
  47         ext2fs_write_inode(fs, from_ino, &inode);
  48 }
  49
  50 void e2fsck_hide_quota(e2fsck_t ctx)
  51 {
  52         struct ext2_super_block *sb = ctx->fs->super;
  53         struct problem_context  pctx;
  54         ext2_filsys             fs = ctx->fs;
  55
  56         clear_problem_context(&pctx);
  57
  58         if ((ctx->options & E2F_OPT_READONLY) ||
  59             !(sb->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_QUOTA))
  60                 return;
  61
  62         pctx.ino = sb->s_usr_quota_inum;
  63         if (sb->s_usr_quota_inum &&
  64             (sb->s_usr_quota_inum != EXT4_USR_QUOTA_INO) &&
  65             fix_problem(ctx, PR_0_HIDE_QUOTA, &pctx)) {
  66                 move_quota_inode(fs, sb->s_usr_quota_inum, EXT4_USR_QUOTA_INO,
  67                                  USRQUOTA);
  68                 sb->s_usr_quota_inum = EXT4_USR_QUOTA_INO;
  69         }
  70
  71         pctx.ino = sb->s_grp_quota_inum;
  72         if (sb->s_grp_quota_inum &&
  73             (sb->s_grp_quota_inum != EXT4_GRP_QUOTA_INO) &&
  74             fix_problem(ctx, PR_0_HIDE_QUOTA, &pctx)) {
  75                 move_quota_inode(fs, sb->s_grp_quota_inum, EXT4_GRP_QUOTA_INO,
  76                                  GRPQUOTA);
  77                 sb->s_grp_quota_inum = EXT4_GRP_QUOTA_INO;
  78         }
  79
  80         return;
  81 }