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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2011-05-05 01:23:57 +0900
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2011-05-10 22:21:45 +0900
commit619205da5b567504310daf829dede1187fa29bbc (patch)
treecd672bb647ff22c711d93437fc53821852f27eba /include/linux/nilfs2_fs.h
parent56eb55388580ebd51f3bbd9af40ebb56849356af (diff)
downloadop-kernel-dev-619205da5b567504310daf829dede1187fa29bbc.zip
op-kernel-dev-619205da5b567504310daf829dede1187fa29bbc.tar.gz
nilfs2: add ioctl which limits range of segment to be allocated
This adds a new ioctl command which limits range of segment to be allocated. This is intended to gather data whithin a range of the partition before shrinking the filesystem, or to control new log location for some purpose. If a range is specified by the ioctl, segment allocator of nilfs tries to allocate new segments from the range unless no free segments are available there. 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.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/nilfs2_fs.h b/include/linux/nilfs2_fs.h
index bd8678f..7454ad7 100644
--- a/include/linux/nilfs2_fs.h
+++ b/include/linux/nilfs2_fs.h
@@ -845,5 +845,7 @@ struct nilfs_bdesc {
_IOR(NILFS_IOCTL_IDENT, 0x8A, __u64)
#define NILFS_IOCTL_RESIZE \
_IOW(NILFS_IOCTL_IDENT, 0x8B, __u64)
+#define NILFS_IOCTL_SET_ALLOC_RANGE \
+ _IOW(NILFS_IOCTL_IDENT, 0x8C, __u64[2])
#endif /* _LINUX_NILFS_FS_H */
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