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 19 static void move_quota_inode(ext2_filsys fs, ext2_ino_t from_ino, 20 ext2_ino_t to_ino, enum quota_type qtype) 21 { 22 struct ext2_inode inode; 23 errcode_t retval; 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 retval = ext2fs_read_inode(fs, from_ino, &inode); 31 if (retval) { 32 com_err("ext2fs_read_inode", retval, "%s", 33 _("in move_quota_inode")); 34 return; 35 } 36 37 inode.i_links_count = 1; 38 inode.i_mode = LINUX_S_IFREG | 0600; 39 inode.i_flags = EXT2_IMMUTABLE_FL; 40 if (ext2fs_has_feature_extents(fs->super)) 41 inode.i_flags |= EXT4_EXTENTS_FL; 42 43 retval = ext2fs_write_new_inode(fs, to_ino, &inode); 44 if (retval) { 45 com_err("ext2fs_write_new_inode", retval, "%s", 46 _("in move_quota_inode")); 47 return; 48 } 49 50 /* unlink the old inode */ 51 quota_get_qf_name(qtype, QFMT_VFS_V1, qf_name); 52 ext2fs_unlink(fs, EXT2_ROOT_INO, qf_name, from_ino, 0); 53 ext2fs_inode_alloc_stats(fs, from_ino, -1); 54 /* Clear out the original inode in the inode-table block. */ 55 memset(&inode, 0, sizeof(struct ext2_inode)); 56 ext2fs_write_inode(fs, from_ino, &inode); 57 } 58 59 void e2fsck_hide_quota(e2fsck_t ctx) 60 { 61 struct ext2_super_block *sb = ctx->fs->super; 62 struct problem_context pctx; 63 ext2_filsys fs = ctx->fs; 64 enum quota_type qtype; 65 ext2_ino_t quota_ino; 66 67 clear_problem_context(&pctx); 68 69 if ((ctx->options & E2F_OPT_READONLY) || 70 !ext2fs_has_feature_quota(sb)) 71 return; 72 73 for (qtype = 0; qtype < MAXQUOTAS; qtype++) { 74 pctx.ino = *quota_sb_inump(sb, qtype); 75 quota_ino = quota_type2inum(qtype, fs->super); 76 if (pctx.ino && (pctx.ino != quota_ino) && 77 fix_problem(ctx, PR_0_HIDE_QUOTA, &pctx)) { 78 move_quota_inode(fs, pctx.ino, quota_ino, qtype); 79 *quota_sb_inump(sb, qtype) = quota_ino; 80 } 81 } 82 83 return; 84 } 85