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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-04-06 19:01:54 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-07 08:31:19 -0700
commit2c2e52fc4fca251e68f90821c9ff5cb18be4df58 (patch)
treefb0b86203bb5f4dda4d5907e29bd2b1b6cc0be90 /include/linux
parent7a9461939a46345860622ea36ff267ee4446f00f (diff)
nilfs2: extend nilfs_sustat ioctl struct
This adds a new argument to the nilfs_sustat structure. The extended field allows to delete volatile active state of segments, which was needed to protect freshly-created segments from garbage collection but has confused code dealing with segments. This extension alleviates the mess and gives room for further simplifications. The volatile active flag is not persistent, so it's eliminable on this occasion without affecting compatibility other than the ioctl change. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/nilfs2_fs.h10
1 files changed, 4 insertions, 6 deletions
diff --git a/include/linux/nilfs2_fs.h b/include/linux/nilfs2_fs.h
index 306c446e694..aa93f0ee29d 100644
--- a/include/linux/nilfs2_fs.h
+++ b/include/linux/nilfs2_fs.h
@@ -565,8 +565,6 @@ enum {
NILFS_SEGMENT_USAGE_DIRTY,
NILFS_SEGMENT_USAGE_ERROR,
- /* on-memory only */
- NILFS_SEGMENT_USAGE_VOLATILE_ACTIVE,
/* ... */
};
@@ -594,7 +592,6 @@ nilfs_segment_usage_##name(const struct nilfs_segment_usage *su) \
NILFS_SEGMENT_USAGE_FNS(ACTIVE, active)
NILFS_SEGMENT_USAGE_FNS(DIRTY, dirty)
NILFS_SEGMENT_USAGE_FNS(ERROR, error)
-NILFS_SEGMENT_USAGE_FNS(VOLATILE_ACTIVE, volatile_active)
static inline void
nilfs_segment_usage_set_clean(struct nilfs_segment_usage *su)
@@ -650,7 +647,6 @@ nilfs_suinfo_##name(const struct nilfs_suinfo *si) \
NILFS_SUINFO_FNS(ACTIVE, active)
NILFS_SUINFO_FNS(DIRTY, dirty)
NILFS_SUINFO_FNS(ERROR, error)
-NILFS_SUINFO_FNS(VOLATILE_ACTIVE, volatile_active)
static inline int nilfs_suinfo_clean(const struct nilfs_suinfo *si)
{
@@ -717,8 +713,9 @@ struct nilfs_cpstat {
* @ss_nsegs: number of segments
* @ss_ncleansegs: number of clean segments
* @ss_ndirtysegs: number of dirty segments
- * @ss_ctime:
- * @ss_nongc_ctime:
+ * @ss_ctime: creation time of the last segment
+ * @ss_nongc_ctime: creation time of the last segment not for GC
+ * @ss_prot_seq: least sequence number of segments which must not be reclaimed
*/
struct nilfs_sustat {
__u64 ss_nsegs;
@@ -726,6 +723,7 @@ struct nilfs_sustat {
__u64 ss_ndirtysegs;
__u64 ss_ctime;
__u64 ss_nongc_ctime;
+ __u64 ss_prot_seq;
};
/**