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bugfix: 存储文件路径的内存对象中已经含有脏数据时，文件搜索会出错

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fslongjin 2022-05-21 19:31:24 +08:00
parent 46ee327742
commit b9c4efcb0f
1 changed files with 7 additions and 4 deletions
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11
kernel/filesystem/fat32/fat32.c
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@ -343,6 +343,11 @@ find_lookup_success:; // 找到目标dentry
finode->write_date = tmp_dEntry->DIR_WrtDate; finode->write_date = tmp_dEntry->DIR_WrtDate;
finode->write_time = tmp_dEntry->DIR_WrtTime; finode->write_time = tmp_dEntry->DIR_WrtTime;
// 暂时使用fat32的高4bit来标志设备文件
// todo: 引入devfs后删除这段代码
if ((tmp_dEntry->DIR_FstClusHI >> 12) && (p->attribute & VFS_ATTR_FILE))
p->attribute |= VFS_ATTR_DEVICE;
dest_dentry->dir_inode = p; dest_dentry->dir_inode = p;
kfree(buf); kfree(buf);
return dest_dentry; return dest_dentry;
@ -486,7 +491,6 @@ void fat32_write_inode(struct vfs_index_node_t *inode)
// 计算目标inode对应数据区的LBA地址 // 计算目标inode对应数据区的LBA地址
uint64_t fLBA = fsbi->first_data_sector + (finode->dEntry_location_clus - 2) * fsbi->sec_per_clus; uint64_t fLBA = fsbi->first_data_sector + (finode->dEntry_location_clus - 2) * fsbi->sec_per_clus;
struct fat32_Directory_t *buf = (struct fat32_Directory_t *)kmalloc(fsbi->bytes_per_clus, 0); struct fat32_Directory_t *buf = (struct fat32_Directory_t *)kmalloc(fsbi->bytes_per_clus, 0);
memset(buf, 0, fsbi->bytes_per_clus); memset(buf, 0, fsbi->bytes_per_clus);
ahci_operation.transfer(AHCI_CMD_READ_DMA_EXT, fLBA, fsbi->sec_per_clus, (uint64_t)buf, fsbi->ahci_ctrl_num, fsbi->ahci_port_num); ahci_operation.transfer(AHCI_CMD_READ_DMA_EXT, fLBA, fsbi->sec_per_clus, (uint64_t)buf, fsbi->ahci_ctrl_num, fsbi->ahci_port_num);
@ -499,7 +503,6 @@ void fat32_write_inode(struct vfs_index_node_t *inode)
fdEntry->DIR_FstClusLO = finode->first_clus & 0xffff; fdEntry->DIR_FstClusLO = finode->first_clus & 0xffff;
fdEntry->DIR_FstClusHI = (finode->first_clus >> 16) | (fdEntry->DIR_FstClusHI & 0xf000); fdEntry->DIR_FstClusHI = (finode->first_clus >> 16) | (fdEntry->DIR_FstClusHI & 0xf000);
// 将dir entry写回磁盘 // 将dir entry写回磁盘
ahci_operation.transfer(AHCI_CMD_WRITE_DMA_EXT, fLBA, fsbi->sec_per_clus, (uint64_t)buf, fsbi->ahci_ctrl_num, fsbi->ahci_port_num); ahci_operation.transfer(AHCI_CMD_WRITE_DMA_EXT, fLBA, fsbi->sec_per_clus, (uint64_t)buf, fsbi->ahci_ctrl_num, fsbi->ahci_port_num);
@ -841,10 +844,10 @@ long fat32_lseek(struct vfs_file_t *file_ptr, long offset, long whence)
break; break;
} }
if(pos<0||pos>file_ptr->dEntry->dir_inode->file_size) if (pos < 0 || pos > file_ptr->dEntry->dir_inode->file_size)
return -EOVERFLOW; return -EOVERFLOW;
file_ptr->position = pos; file_ptr->position = pos;
// kdebug("fat32 lseek -> position=%d", file_ptr->position); // kdebug("fat32 lseek -> position=%d", file_ptr->position);
return pos; return pos;
} }