X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=fs%2Fext4%2Fnamei.c;h=ede3a33a2f1adb80a65e017ada5bd56084dc3c64;hp=aa4c782c9dd7844f74cc6b769ab762eaebef9dc2;hb=90d3d0dd7cd9826cd5245fe6d611c1ceaab2bc2c;hpb=c1f4246716392ec8693c23cffb969bd73c1b0910 diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index aa4c782c9dd7..ede3a33a2f1a 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -585,11 +585,8 @@ static int htree_dirblock_to_tree(struct file *dir_file, if (ext4_check_dir_entry(dir, NULL, de, bh, (block<i_sb)) + ((char *)de - bh->b_data))) { - /* On error, skip the f_pos to the next block. */ - dir_file->f_pos = (dir_file->f_pos | - (dir->i_sb->s_blocksize - 1)) + 1; - brelse(bh); - return count; + /* silently ignore the rest of the block */ + break; } ext4fs_dirhash(de->name, de->name_len, hinfo); if ((hinfo->hash < start_hash) || @@ -1037,7 +1034,13 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, stru EXT4_ERROR_INODE(dir, "bad inode number: %u", ino); return ERR_PTR(-EIO); } - inode = ext4_iget(dir->i_sb, ino); + if (unlikely(ino == dir->i_ino)) { + EXT4_ERROR_INODE(dir, "'%.*s' linked to parent dir", + dentry->d_name.len, + dentry->d_name.name); + return ERR_PTR(-EIO); + } + inode = ext4_iget_normal(dir->i_sb, ino); if (inode == ERR_PTR(-ESTALE)) { EXT4_ERROR_INODE(dir, "deleted inode referenced: %u", @@ -1071,7 +1074,7 @@ struct dentry *ext4_get_parent(struct dentry *child) return ERR_PTR(-EIO); } - return d_obtain_alias(ext4_iget(child->d_inode->i_sb, ino)); + return d_obtain_alias(ext4_iget_normal(child->d_inode->i_sb, ino)); } #define S_SHIFT 12 @@ -1405,30 +1408,35 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry, hinfo.hash_version += EXT4_SB(dir->i_sb)->s_hash_unsigned; hinfo.seed = EXT4_SB(dir->i_sb)->s_hash_seed; ext4fs_dirhash(name, namelen, &hinfo); + memset(frames, 0, sizeof(frames)); frame = frames; frame->entries = entries; frame->at = entries; frame->bh = bh; - bh = bh2; - ext4_handle_dirty_metadata(handle, dir, frame->bh); - ext4_handle_dirty_metadata(handle, dir, bh); + retval = ext4_handle_dirty_metadata(handle, dir, frame->bh); + if (retval) + goto out_frames; + retval = ext4_handle_dirty_metadata(handle, dir, bh2); + if (retval) + goto out_frames; - de = do_split(handle,dir, &bh, frame, &hinfo, &retval); + de = do_split(handle,dir, &bh2, frame, &hinfo, &retval); if (!de) { - /* - * Even if the block split failed, we have to properly write - * out all the changes we did so far. Otherwise we can end up - * with corrupted filesystem. - */ - ext4_mark_inode_dirty(handle, dir); - dx_release(frames); - return retval; + goto out_frames; } - dx_release(frames); - retval = add_dirent_to_buf(handle, dentry, inode, de, bh); - brelse(bh); + retval = add_dirent_to_buf(handle, dentry, inode, de, bh2); +out_frames: + /* + * Even if the block split failed, we have to properly write + * out all the changes we did so far. Otherwise we can end up + * with corrupted filesystem. + */ + if (retval) + ext4_mark_inode_dirty(handle, dir); + dx_release(frames); + brelse(bh2); return retval; } @@ -1446,7 +1454,7 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry, struct inode *inode) { struct inode *dir = dentry->d_parent->d_inode; - struct buffer_head *bh; + struct buffer_head *bh = NULL; struct ext4_dir_entry_2 *de; struct super_block *sb; int retval; @@ -1461,7 +1469,7 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry, if (is_dx(dir)) { retval = ext4_dx_add_entry(handle, dentry, inode); if (!retval || (retval != ERR_BAD_DX_DIR)) - return retval; + goto out; ext4_clear_inode_flag(dir, EXT4_INODE_INDEX); dx_fallback++; ext4_mark_inode_dirty(handle, dir); @@ -1472,14 +1480,15 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry, if(!bh) return retval; retval = add_dirent_to_buf(handle, dentry, inode, NULL, bh); - if (retval != -ENOSPC) { - brelse(bh); - return retval; - } + if (retval != -ENOSPC) + goto out; if (blocks == 1 && !dx_fallback && - EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX)) - return make_indexed_dir(handle, dentry, inode, bh); + EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX)) { + retval = make_indexed_dir(handle, dentry, inode, bh); + bh = NULL; /* make_indexed_dir releases bh */ + goto out; + } brelse(bh); } bh = ext4_append(handle, dir, &block, &retval); @@ -1489,6 +1498,7 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry, de->inode = 0; de->rec_len = ext4_rec_len_to_disk(blocksize, blocksize); retval = add_dirent_to_buf(handle, dentry, inode, de, bh); +out: brelse(bh); if (retval == 0) ext4_set_inode_state(inode, EXT4_STATE_NEWENTRY); @@ -1795,9 +1805,7 @@ retry: err = PTR_ERR(inode); if (!IS_ERR(inode)) { init_special_inode(inode, inode->i_mode, rdev); -#ifdef CONFIG_EXT4_FS_XATTR inode->i_op = &ext4_special_inode_operations; -#endif err = ext4_add_nondir(handle, dentry, inode); } ext4_journal_stop(handle); @@ -1978,7 +1986,7 @@ int ext4_orphan_add(handle_t *handle, struct inode *inode) struct ext4_iloc iloc; int err = 0, rc; - if (!ext4_handle_valid(handle)) + if (!EXT4_SB(sb)->s_journal || is_bad_inode(inode)) return 0; mutex_lock(&EXT4_SB(sb)->s_orphan_lock); @@ -2052,8 +2060,8 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode) struct ext4_iloc iloc; int err = 0; - /* ext4_handle_valid() assumes a valid handle_t pointer */ - if (handle && !ext4_handle_valid(handle)) + if (!EXT4_SB(inode->i_sb)->s_journal && + !(EXT4_SB(inode->i_sb)->s_mount_state & EXT4_ORPHAN_FS)) return 0; mutex_lock(&EXT4_SB(inode->i_sb)->s_orphan_lock); @@ -2072,7 +2080,7 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode) * transaction handle with which to update the orphan list on * disk, but we still need to remove the inode from the linked * list in memory. */ - if (sbi->s_journal && !handle) + if (!handle) goto out; err = ext4_reserve_inode_write(handle, inode, &iloc);