nilfs2: add /sys/fs/nilfs2/<device>/segctor group
This patch adds creation of /sys/fs/nilfs2/<device>/segctor group. The segctor group contains attributes that describe segctor thread activity details: (1) last_pseg_block - show start block number of the latest segment. (2) last_seg_sequence - show sequence value of the latest segment. (3) last_seg_checkpoint - show checkpoint number of the latest segment. (4) current_seg_sequence - show segment sequence counter. (5) current_last_full_seg - show index number of the latest full segment. (6) next_full_seg - show index number of the full segment index to be used next. (7) next_pseg_offset - show offset of next partial segment in the current full segment. (8) next_checkpoint - show next checkpoint number. (9) last_seg_write_time - show write time of the last segment in human-readable format. (10) last_seg_write_time_secs - show write time of the last segment in seconds. (11) last_nongc_write_time - show write time of the last segment not for cleaner operation in human-readable format. (12) last_nongc_write_time_secs - show write time of the last segment not for cleaner operation in seconds. (13) dirty_data_blocks_count - show number of dirty data blocks. Signed-off-by: Vyacheslav Dubeyko <Vyacheslav.Dubeyko@hgst.com> Cc: Vyacheslav Dubeyko <slava@dubeyko.com> Cc: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Michael L. Semon <mlsemon35@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Vyacheslav Dubeyko
Linus Torvalds
parent
caa05d49df
commit
abc968dbf2
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@ -89,3 +89,93 @@ Contact: "Vyacheslav Dubeyko" <slava@dubeyko.com>
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Description:
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Describe attributes of /sys/fs/nilfs2/<device>/superblock
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group.
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What: /sys/fs/nilfs2/<device>/segctor/last_pseg_block
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Date: April 2014
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Contact: "Vyacheslav Dubeyko" <slava@dubeyko.com>
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Description:
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Show start block number of the latest segment.
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What: /sys/fs/nilfs2/<device>/segctor/last_seg_sequence
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Date: April 2014
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Contact: "Vyacheslav Dubeyko" <slava@dubeyko.com>
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Description:
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Show sequence value of the latest segment.
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What: /sys/fs/nilfs2/<device>/segctor/last_seg_checkpoint
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Date: April 2014
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Contact: "Vyacheslav Dubeyko" <slava@dubeyko.com>
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Description:
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Show checkpoint number of the latest segment.
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What: /sys/fs/nilfs2/<device>/segctor/current_seg_sequence
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Date: April 2014
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Contact: "Vyacheslav Dubeyko" <slava@dubeyko.com>
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Description:
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Show segment sequence counter.
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What: /sys/fs/nilfs2/<device>/segctor/current_last_full_seg
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Date: April 2014
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Contact: "Vyacheslav Dubeyko" <slava@dubeyko.com>
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Description:
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Show index number of the latest full segment.
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What: /sys/fs/nilfs2/<device>/segctor/next_full_seg
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Date: April 2014
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Contact: "Vyacheslav Dubeyko" <slava@dubeyko.com>
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Description:
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Show index number of the full segment index
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to be used next.
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What: /sys/fs/nilfs2/<device>/segctor/next_pseg_offset
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Date: April 2014
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Contact: "Vyacheslav Dubeyko" <slava@dubeyko.com>
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Description:
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Show offset of next partial segment in the current
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full segment.
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What: /sys/fs/nilfs2/<device>/segctor/next_checkpoint
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Date: April 2014
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Contact: "Vyacheslav Dubeyko" <slava@dubeyko.com>
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Description:
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Show next checkpoint number.
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What: /sys/fs/nilfs2/<device>/segctor/last_seg_write_time
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Date: April 2014
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Contact: "Vyacheslav Dubeyko" <slava@dubeyko.com>
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Description:
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Show write time of the last segment in
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human-readable format.
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What: /sys/fs/nilfs2/<device>/segctor/last_seg_write_time_secs
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Date: April 2014
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Contact: "Vyacheslav Dubeyko" <slava@dubeyko.com>
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Description:
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Show write time of the last segment in seconds.
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What: /sys/fs/nilfs2/<device>/segctor/last_nongc_write_time
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Date: April 2014
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Contact: "Vyacheslav Dubeyko" <slava@dubeyko.com>
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Description:
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Show write time of the last segment not for cleaner
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operation in human-readable format.
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What: /sys/fs/nilfs2/<device>/segctor/last_nongc_write_time_secs
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Date: April 2014
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Contact: "Vyacheslav Dubeyko" <slava@dubeyko.com>
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Description:
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Show write time of the last segment not for cleaner
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operation in seconds.
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What: /sys/fs/nilfs2/<device>/segctor/dirty_data_blocks_count
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Date: April 2014
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Contact: "Vyacheslav Dubeyko" <slava@dubeyko.com>
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Description:
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Show number of dirty data blocks.
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What: /sys/fs/nilfs2/<device>/segctor/README
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Date: April 2014
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Contact: "Vyacheslav Dubeyko" <slava@dubeyko.com>
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Description:
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Describe attributes of /sys/fs/nilfs2/<device>/segctor
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group.
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@ -111,6 +111,268 @@ void nilfs_sysfs_delete_##name##_group(struct the_nilfs *nilfs) \
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kobject_del(&nilfs->ns_##parent_name##_subgroups->sg_##name##_kobj); \
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}
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/************************************************************************
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* NILFS segctor attrs *
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************************************************************************/
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static ssize_t
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nilfs_segctor_last_pseg_block_show(struct nilfs_segctor_attr *attr,
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struct the_nilfs *nilfs,
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char *buf)
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{
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sector_t last_pseg;
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spin_lock(&nilfs->ns_last_segment_lock);
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last_pseg = nilfs->ns_last_pseg;
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spin_unlock(&nilfs->ns_last_segment_lock);
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return snprintf(buf, PAGE_SIZE, "%llu\n",
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(unsigned long long)last_pseg);
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}
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static ssize_t
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nilfs_segctor_last_seg_sequence_show(struct nilfs_segctor_attr *attr,
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struct the_nilfs *nilfs,
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char *buf)
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{
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u64 last_seq;
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spin_lock(&nilfs->ns_last_segment_lock);
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last_seq = nilfs->ns_last_seq;
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spin_unlock(&nilfs->ns_last_segment_lock);
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return snprintf(buf, PAGE_SIZE, "%llu\n", last_seq);
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}
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static ssize_t
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nilfs_segctor_last_seg_checkpoint_show(struct nilfs_segctor_attr *attr,
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struct the_nilfs *nilfs,
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char *buf)
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{
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__u64 last_cno;
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spin_lock(&nilfs->ns_last_segment_lock);
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last_cno = nilfs->ns_last_cno;
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spin_unlock(&nilfs->ns_last_segment_lock);
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return snprintf(buf, PAGE_SIZE, "%llu\n", last_cno);
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}
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static ssize_t
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nilfs_segctor_current_seg_sequence_show(struct nilfs_segctor_attr *attr,
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struct the_nilfs *nilfs,
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char *buf)
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{
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u64 seg_seq;
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down_read(&nilfs->ns_sem);
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seg_seq = nilfs->ns_seg_seq;
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up_read(&nilfs->ns_sem);
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return snprintf(buf, PAGE_SIZE, "%llu\n", seg_seq);
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}
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static ssize_t
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nilfs_segctor_current_last_full_seg_show(struct nilfs_segctor_attr *attr,
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struct the_nilfs *nilfs,
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char *buf)
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{
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__u64 segnum;
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down_read(&nilfs->ns_sem);
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segnum = nilfs->ns_segnum;
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up_read(&nilfs->ns_sem);
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return snprintf(buf, PAGE_SIZE, "%llu\n", segnum);
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}
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static ssize_t
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nilfs_segctor_next_full_seg_show(struct nilfs_segctor_attr *attr,
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struct the_nilfs *nilfs,
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char *buf)
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{
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__u64 nextnum;
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down_read(&nilfs->ns_sem);
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nextnum = nilfs->ns_nextnum;
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up_read(&nilfs->ns_sem);
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return snprintf(buf, PAGE_SIZE, "%llu\n", nextnum);
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}
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static ssize_t
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nilfs_segctor_next_pseg_offset_show(struct nilfs_segctor_attr *attr,
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struct the_nilfs *nilfs,
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char *buf)
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{
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unsigned long pseg_offset;
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down_read(&nilfs->ns_sem);
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pseg_offset = nilfs->ns_pseg_offset;
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up_read(&nilfs->ns_sem);
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return snprintf(buf, PAGE_SIZE, "%lu\n", pseg_offset);
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}
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static ssize_t
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nilfs_segctor_next_checkpoint_show(struct nilfs_segctor_attr *attr,
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struct the_nilfs *nilfs,
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char *buf)
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{
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__u64 cno;
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down_read(&nilfs->ns_sem);
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cno = nilfs->ns_cno;
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up_read(&nilfs->ns_sem);
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return snprintf(buf, PAGE_SIZE, "%llu\n", cno);
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}
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static ssize_t
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nilfs_segctor_last_seg_write_time_show(struct nilfs_segctor_attr *attr,
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struct the_nilfs *nilfs,
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char *buf)
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{
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time_t ctime;
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down_read(&nilfs->ns_sem);
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ctime = nilfs->ns_ctime;
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up_read(&nilfs->ns_sem);
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return NILFS_SHOW_TIME(ctime, buf);
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}
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static ssize_t
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nilfs_segctor_last_seg_write_time_secs_show(struct nilfs_segctor_attr *attr,
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struct the_nilfs *nilfs,
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char *buf)
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{
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time_t ctime;
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down_read(&nilfs->ns_sem);
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ctime = nilfs->ns_ctime;
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up_read(&nilfs->ns_sem);
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return snprintf(buf, PAGE_SIZE, "%llu\n", (unsigned long long)ctime);
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}
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static ssize_t
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nilfs_segctor_last_nongc_write_time_show(struct nilfs_segctor_attr *attr,
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struct the_nilfs *nilfs,
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char *buf)
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{
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time_t nongc_ctime;
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down_read(&nilfs->ns_sem);
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nongc_ctime = nilfs->ns_nongc_ctime;
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up_read(&nilfs->ns_sem);
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return NILFS_SHOW_TIME(nongc_ctime, buf);
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}
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static ssize_t
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nilfs_segctor_last_nongc_write_time_secs_show(struct nilfs_segctor_attr *attr,
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struct the_nilfs *nilfs,
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char *buf)
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{
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time_t nongc_ctime;
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down_read(&nilfs->ns_sem);
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nongc_ctime = nilfs->ns_nongc_ctime;
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up_read(&nilfs->ns_sem);
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return snprintf(buf, PAGE_SIZE, "%llu\n",
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(unsigned long long)nongc_ctime);
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}
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static ssize_t
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nilfs_segctor_dirty_data_blocks_count_show(struct nilfs_segctor_attr *attr,
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struct the_nilfs *nilfs,
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char *buf)
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{
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u32 ndirtyblks;
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down_read(&nilfs->ns_sem);
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ndirtyblks = atomic_read(&nilfs->ns_ndirtyblks);
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up_read(&nilfs->ns_sem);
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return snprintf(buf, PAGE_SIZE, "%u\n", ndirtyblks);
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}
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static const char segctor_readme_str[] =
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"The segctor group contains attributes that describe\n"
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"segctor thread activity details.\n\n"
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"(1) last_pseg_block\n"
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"\tshow start block number of the latest segment.\n\n"
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"(2) last_seg_sequence\n"
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"\tshow sequence value of the latest segment.\n\n"
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"(3) last_seg_checkpoint\n"
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"\tshow checkpoint number of the latest segment.\n\n"
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"(4) current_seg_sequence\n\tshow segment sequence counter.\n\n"
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"(5) current_last_full_seg\n"
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"\tshow index number of the latest full segment.\n\n"
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"(6) next_full_seg\n"
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"\tshow index number of the full segment index to be used next.\n\n"
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"(7) next_pseg_offset\n"
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"\tshow offset of next partial segment in the current full segment.\n\n"
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"(8) next_checkpoint\n\tshow next checkpoint number.\n\n"
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"(9) last_seg_write_time\n"
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"\tshow write time of the last segment in human-readable format.\n\n"
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"(10) last_seg_write_time_secs\n"
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"\tshow write time of the last segment in seconds.\n\n"
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"(11) last_nongc_write_time\n"
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"\tshow write time of the last segment not for cleaner operation "
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"in human-readable format.\n\n"
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"(12) last_nongc_write_time_secs\n"
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"\tshow write time of the last segment not for cleaner operation "
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"in seconds.\n\n"
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"(13) dirty_data_blocks_count\n"
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"\tshow number of dirty data blocks.\n\n";
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static ssize_t
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nilfs_segctor_README_show(struct nilfs_segctor_attr *attr,
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struct the_nilfs *nilfs, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, segctor_readme_str);
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}
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NILFS_SEGCTOR_RO_ATTR(last_pseg_block);
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NILFS_SEGCTOR_RO_ATTR(last_seg_sequence);
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NILFS_SEGCTOR_RO_ATTR(last_seg_checkpoint);
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NILFS_SEGCTOR_RO_ATTR(current_seg_sequence);
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NILFS_SEGCTOR_RO_ATTR(current_last_full_seg);
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NILFS_SEGCTOR_RO_ATTR(next_full_seg);
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NILFS_SEGCTOR_RO_ATTR(next_pseg_offset);
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NILFS_SEGCTOR_RO_ATTR(next_checkpoint);
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NILFS_SEGCTOR_RO_ATTR(last_seg_write_time);
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NILFS_SEGCTOR_RO_ATTR(last_seg_write_time_secs);
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NILFS_SEGCTOR_RO_ATTR(last_nongc_write_time);
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NILFS_SEGCTOR_RO_ATTR(last_nongc_write_time_secs);
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NILFS_SEGCTOR_RO_ATTR(dirty_data_blocks_count);
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NILFS_SEGCTOR_RO_ATTR(README);
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static struct attribute *nilfs_segctor_attrs[] = {
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NILFS_SEGCTOR_ATTR_LIST(last_pseg_block),
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NILFS_SEGCTOR_ATTR_LIST(last_seg_sequence),
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NILFS_SEGCTOR_ATTR_LIST(last_seg_checkpoint),
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NILFS_SEGCTOR_ATTR_LIST(current_seg_sequence),
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NILFS_SEGCTOR_ATTR_LIST(current_last_full_seg),
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NILFS_SEGCTOR_ATTR_LIST(next_full_seg),
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NILFS_SEGCTOR_ATTR_LIST(next_pseg_offset),
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NILFS_SEGCTOR_ATTR_LIST(next_checkpoint),
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NILFS_SEGCTOR_ATTR_LIST(last_seg_write_time),
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NILFS_SEGCTOR_ATTR_LIST(last_seg_write_time_secs),
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NILFS_SEGCTOR_ATTR_LIST(last_nongc_write_time),
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NILFS_SEGCTOR_ATTR_LIST(last_nongc_write_time_secs),
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NILFS_SEGCTOR_ATTR_LIST(dirty_data_blocks_count),
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NILFS_SEGCTOR_ATTR_LIST(README),
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NULL,
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};
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NILFS_DEV_INT_GROUP_OPS(segctor, dev);
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NILFS_DEV_INT_GROUP_TYPE(segctor, dev);
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NILFS_DEV_INT_GROUP_FNS(segctor, dev);
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/************************************************************************
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* NILFS superblock attrs *
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************************************************************************/
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@ -406,8 +668,15 @@ int nilfs_sysfs_create_device_group(struct super_block *sb)
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if (err)
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goto cleanup_dev_kobject;
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err = nilfs_sysfs_create_segctor_group(nilfs);
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if (err)
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goto delete_superblock_group;
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return 0;
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delete_superblock_group:
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nilfs_sysfs_delete_superblock_group(nilfs);
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cleanup_dev_kobject:
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kobject_del(&nilfs->ns_dev_kobj);
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@ -421,6 +690,7 @@ failed_create_device_group:
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void nilfs_sysfs_delete_device_group(struct the_nilfs *nilfs)
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{
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nilfs_sysfs_delete_superblock_group(nilfs);
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nilfs_sysfs_delete_segctor_group(nilfs);
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kobject_del(&nilfs->ns_dev_kobj);
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kfree(nilfs->ns_dev_subgroups);
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}
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@ -28,11 +28,17 @@
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* struct nilfs_sysfs_dev_subgroups - device subgroup kernel objects
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* @sg_superblock_kobj: /sys/fs/<nilfs>/<device>/superblock
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* @sg_superblock_kobj_unregister: completion state
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* @sg_segctor_kobj: /sys/fs/<nilfs>/<device>/segctor
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* @sg_segctor_kobj_unregister: completion state
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*/
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struct nilfs_sysfs_dev_subgroups {
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/* /sys/fs/<nilfs>/<device>/superblock */
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struct kobject sg_superblock_kobj;
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struct completion sg_superblock_kobj_unregister;
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/* /sys/fs/<nilfs>/<device>/segctor */
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struct kobject sg_segctor_kobj;
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struct completion sg_segctor_kobj_unregister;
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};
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#define NILFS_COMMON_ATTR_STRUCT(name) \
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@ -57,6 +63,7 @@ struct nilfs_##name##_attr { \
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NILFS_DEV_ATTR_STRUCT(dev);
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NILFS_DEV_ATTR_STRUCT(superblock);
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||||
NILFS_DEV_ATTR_STRUCT(segctor);
|
||||
|
||||
#define NILFS_ATTR(type, name, mode, show, store) \
|
||||
static struct nilfs_##type##_attr nilfs_##type##_attr_##name = \
|
||||
|
|
@ -90,11 +97,20 @@ NILFS_DEV_ATTR_STRUCT(superblock);
|
|||
#define NILFS_SUPERBLOCK_RW_ATTR(name) \
|
||||
NILFS_RW_ATTR(superblock, name)
|
||||
|
||||
#define NILFS_SEGCTOR_INFO_ATTR(name) \
|
||||
NILFS_INFO_ATTR(segctor, name)
|
||||
#define NILFS_SEGCTOR_RO_ATTR(name) \
|
||||
NILFS_RO_ATTR(segctor, name)
|
||||
#define NILFS_SEGCTOR_RW_ATTR(name) \
|
||||
NILFS_RW_ATTR(segctor, name)
|
||||
|
||||
#define NILFS_FEATURE_ATTR_LIST(name) \
|
||||
(&nilfs_feature_attr_##name.attr)
|
||||
#define NILFS_DEV_ATTR_LIST(name) \
|
||||
(&nilfs_dev_attr_##name.attr)
|
||||
#define NILFS_SUPERBLOCK_ATTR_LIST(name) \
|
||||
(&nilfs_superblock_attr_##name.attr)
|
||||
#define NILFS_SEGCTOR_ATTR_LIST(name) \
|
||||
(&nilfs_segctor_attr_##name.attr)
|
||||
|
||||
#endif /* _NILFS_SYSFS_H */
|
||||
|
|
|
|||
Loading…
Reference in New Issue