Example Analysis of cephfs linux kernel client for ceph_inode_info related work queue processing function

This article mainly introduces cephfs linux kernel client for ceph_inode_info-related work queue processing function example analysis, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.

Struct ceph_inode_info {

.

Struct work_struct iTunwbworks; / / writeback work

Struct work_struct iTunes pgstarted inventing work; / / page invaliate work

Struct work_struct i_vmtruncate_work

.

}

Struct ceph_inode_info- > i_wb_work work queue handler

Ceph_writeback_work (struct work_struct * work)

| | _ _ get struct ceph_inode_info structure from work |

| | _ _ get struct inode structure from struct ceph_inode_info structure |

| | _ _ call the filemap_fdatawrite (& inode- > i_data) function to write back the dirty data in the struct address_space specified by inode- > i_data to the ceph cluster |

| | _ _ call _ _ filemap_fdatawrite () function |

| | _ _ call _ _ filemap_fdatawrite_range () function |

| | _ _ create struct writeback_control structure and initialize it |

| | _ _ call wbc_attach_fdatawrite_inode () function to add struct writeback_control structure to struct inode |

| | _ _ call the do_writepages () function to write back the dirty data in struct address_space to the ceph cluster |

| | _ _ call ceph_writepages_start () function for data write-back operation |

Struct ceph_inode_info- > i_pg_inv_work work queue handler

Ceph_invalidate_work (struct work_struct * work)

| | _ _ get struct ceph_inode_info structure from work |

| | _ _ get struct inode structure from struct ceph_inode_info structure |

| | _ _ get struct ceph_fs_client structure from struct inode structure |

| | _ _ call the invalidate_inode_page2 () function to clear all pages in the struct address_space specified by inode- > i_mapping |

Struct ceph_inode_info- > i_vmtruncate_work work queue handler

Ceph_vmtruncate_work (struct work_strcut * work)

| | _ _ get struct ceph_inode_info structure from work |

| | _ _ get struct inode structure from struct ceph_inode_info structure |

| | _ _ call all the pages corresponding to the struct address_space in the truncate struct inode structure of the _ _ ceph_do_pending_vmtruncate () function |

| | _ _ call the truncate_pagecache () function to unmap and delete the pagecache that has already been truncated |

| | _ _ call wake_up_all (& ci- > i_cap_wq) function to wake up the waiting process on struct ceph_inode_info- > i_cap_wq |

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