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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-08-20 20:10:38 +0900
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-10-23 09:24:33 +0900
commit6c43f41000312fefa482c3bfdd97e7f81d6be0ec (patch)
treede22a81c028f33d9fc2354bfdc218191b96240cf /include/linux/nilfs2_fs.h
parent7d6cd92fe2de3c286b8e95f43223f09db9302635 (diff)
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nilfs2: keep zero value in i_cno except for gc-inodes
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>
Diffstat (limited to 'include/linux/nilfs2_fs.h')
-rw-r--r--include/linux/nilfs2_fs.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/nilfs2_fs.h b/include/linux/nilfs2_fs.h
index b07f5cd..bcdb34c 100644
--- a/include/linux/nilfs2_fs.h
+++ b/include/linux/nilfs2_fs.h
@@ -271,6 +271,14 @@ struct nilfs_super_block {
segments */
/*
+ * We call DAT, cpfile, and sufile root metadata files. Inodes of
+ * these files are written in super root block instead of ifile, and
+ * garbage collector doesn't keep any past versions of these files.
+ */
+#define NILFS_ROOT_METADATA_FILE(ino) \
+ ((ino) >= NILFS_DAT_INO && (ino) <= NILFS_SUFILE_INO)
+
+/*
* bytes offset of secondary super block
*/
#define NILFS_SB2_OFFSET_BYTES(devsize) ((((devsize) >> 12) - 1) << 12)
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