quota.c revision ec7686e3e723ac8644a48ade6b58a1ca8dab6599
175e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen/* 275e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen * quota.c --- code for handling ext4 quota inodes 375e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen * 475e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen */ 575e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen 675e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen#include "config.h" 775e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen#ifdef HAVE_SYS_MOUNT_H 875e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen#include <sys/param.h> 975e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen#include <sys/mount.h> 1075e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen#define MNT_FL (MS_MGC_VAL | MS_RDONLY) 1175e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen#endif 1275e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen#ifdef HAVE_SYS_STAT_H 1375e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen#include <sys/stat.h> 1475e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen#endif 1575e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen 1675e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen#include "e2fsck.h" 1775e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen#include "problem.h" 1875e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen#include "quota/mkquota.h" 1975e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen#include "quota/quotaio.h" 2075e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen 2175e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chenstatic void move_quota_inode(ext2_filsys fs, ext2_ino_t from_ino, 2275e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen ext2_ino_t to_ino, int qtype) 2375e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen{ 2475e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen struct ext2_inode inode; 2575e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen char qf_name[QUOTA_NAME_LEN]; 2675e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen 2775e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen /* We need the inode bitmap to be loaded */ 2875e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen if (ext2fs_read_bitmaps(fs)) 2975e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen return; 3075e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen 3175e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen if (ext2fs_read_inode(fs, from_ino, &inode)) 3275e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen return; 3375e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen 3475e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen inode.i_links_count = 1; 3575e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen inode.i_mode = LINUX_S_IFREG | 0600; 3675e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen inode.i_flags = EXT2_IMMUTABLE_FL; 3775e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen if (fs->super->s_feature_incompat & 3875e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen EXT3_FEATURE_INCOMPAT_EXTENTS) 3921416a1d09aad1e25401e54578c3343bb0f0c25fEnrico Granata inode.i_flags |= EXT4_EXTENTS_FL; 4075e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen 4175e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen ext2fs_write_new_inode(fs, to_ino, &inode); 4275e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen /* unlink the old inode */ 4321416a1d09aad1e25401e54578c3343bb0f0c25fEnrico Granata quota_get_qf_name(qtype, QFMT_VFS_V1, qf_name); 4475e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen ext2fs_unlink(fs, EXT2_ROOT_INO, qf_name, from_ino, 0); 4575e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen ext2fs_inode_alloc_stats(fs, from_ino, -1); 4675e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen /* Clear out the original inode in the inode-table block. */ 4775e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen memset(&inode, 0, sizeof(struct ext2_inode)); 4875e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen ext2fs_write_inode(fs, from_ino, &inode); 4975e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen} 5021416a1d09aad1e25401e54578c3343bb0f0c25fEnrico Granata 5121416a1d09aad1e25401e54578c3343bb0f0c25fEnrico Granatavoid e2fsck_hide_quota(e2fsck_t ctx) 5221416a1d09aad1e25401e54578c3343bb0f0c25fEnrico Granata{ 5321416a1d09aad1e25401e54578c3343bb0f0c25fEnrico Granata struct ext2_super_block *sb = ctx->fs->super; 5421416a1d09aad1e25401e54578c3343bb0f0c25fEnrico Granata struct problem_context pctx; 5521416a1d09aad1e25401e54578c3343bb0f0c25fEnrico Granata ext2_filsys fs = ctx->fs; 5675e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen 5775e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen clear_problem_context(&pctx); 5875e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen 5975e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen if ((ctx->options & E2F_OPT_READONLY) || 6075e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen !(sb->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_QUOTA)) 6175e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen return; 6275e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen 6375e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen pctx.ino = sb->s_usr_quota_inum; 6475e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen if (sb->s_usr_quota_inum && 6575e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen (sb->s_usr_quota_inum != EXT4_USR_QUOTA_INO) && 6675e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen fix_problem(ctx, PR_0_HIDE_QUOTA, &pctx)) { 6775e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen move_quota_inode(fs, sb->s_usr_quota_inum, EXT4_USR_QUOTA_INO, 6875e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen USRQUOTA); 6975e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen sb->s_usr_quota_inum = EXT4_USR_QUOTA_INO; 7075e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen } 7175e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen 7275e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen pctx.ino = sb->s_grp_quota_inum; 7375e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen if (sb->s_grp_quota_inum && 7475e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen (sb->s_grp_quota_inum != EXT4_GRP_QUOTA_INO) && 7575e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen fix_problem(ctx, PR_0_HIDE_QUOTA, &pctx)) { 7675e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen move_quota_inode(fs, sb->s_grp_quota_inum, EXT4_GRP_QUOTA_INO, 7775e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen GRPQUOTA); 7875e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen sb->s_grp_quota_inum = EXT4_GRP_QUOTA_INO; 7975e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen } 8075e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen 8175e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen return; 8275e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen} 8375e28f942c1b9f9c6d5a0d5f2efd037cbbc9fc74Johnny Chen