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nilfs2: keep zero value in i_cno except for gc-inodes

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On-memory inode structures of nilfs have a member "i_cno" which stores
a checkpoint number related to the inode.  For gc-inodes, this field
indicates version of data each gc-inode caches for GC.  Log writer
temporarily uses "i_cno" to transfer the latest checkpoint number.

This stops the latter use and lets only gc-inodes use it.

The purpose of this patch is to allow the successive change use
"i_cno" for inode lookup.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
This commit is contained in:
Ryusuke Konishi
2010-08-20 20:10:38 +09:00
parent 7d6cd92fe2
commit 6c43f41000
3 changed files with 24 additions and 16 deletions
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3
fs/nilfs2/segment.h
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@@ -107,6 +107,7 @@ struct nilfs_segsum_pointer {
* @sc_datablk_cnt: Data block count of a file
* @sc_nblk_this_inc: Number of blocks included in the current logical segment
* @sc_seg_ctime: Creation time
* @sc_cno: checkpoint number of current log
* @sc_flags: Internal flags
* @sc_state_lock: spinlock for sc_state and so on
* @sc_state: Segctord state flags
@@ -156,7 +157,7 @@ struct nilfs_sc_info {
unsigned long sc_datablk_cnt;
unsigned long sc_nblk_this_inc;
time_t sc_seg_ctime;
__u64 sc_cno;
unsigned long sc_flags;
spinlock_t sc_state_lock;