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nilfs2: support nanosecond timestamp

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After a review of user's feedback for finding out other compatibility
issues, I found nilfs improperly initializes timestamps in inode;
CURRENT_TIME was used there instead of CURRENT_TIME_SEC even though nilfs
didn't have nanosecond timestamps on disk.  A few users gave us the report
that the tar program sometimes failed to expand symbolic links on nilfs,
and it turned out to be the cause.

Instead of applying the above displacement, I've decided to support
nanosecond timestamps on this occation.  Fortunetaly, a needless 64-bit
field was in the nilfs_inode struct, and I found it's available for this
purpose without impact for the users.

So, this will do the enhancement and resolve the tar problem.

Signed-off-by: Ryusuke Konishi <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Ryusuke Konishi 2009-04-06 19:02:00 -07:00 • committed by Linus Torvalds
commit 612392307c
5 changed files with 13 additions and 13 deletions
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1
fs/nilfs2/gcinode.c
View file

@ -226,7 +226,6 @@ static struct inode *alloc_gcinode(struct the_nilfs *nilfs, ino_t ino,
ii->i_flags = 0;
ii->i_state = 1 << NILFS_I_GCINODE;
ii->i_bh = NULL;
ii->i_dtime = 0;
nilfs_bmap_init_gc(ii->i_bmap);
return inode;

13
fs/nilfs2/inode.c
View file

@ -306,7 +306,6 @@ struct inode *nilfs_new_inode(struct inode *dir, int mode)
/* ii->i_file_acl = 0; */
/* ii->i_dir_acl = 0; */
ii->i_dtime = 0;
ii->i_dir_start_lookup = 0;
#ifdef CONFIG_NILFS_FS_POSIX_ACL
ii->i_acl = NULL;
@ -390,11 +389,10 @@ int nilfs_read_inode_common(struct inode *inode,
inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime);
inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime);
inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime);
inode->i_atime.tv_nsec = 0;
inode->i_ctime.tv_nsec = 0;
inode->i_mtime.tv_nsec = 0;
ii->i_dtime = le64_to_cpu(raw_inode->i_dtime);
if (inode->i_nlink == 0 && (inode->i_mode == 0 || ii->i_dtime))
inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec);
inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec);
inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec);
if (inode->i_nlink == 0 && inode->i_mode == 0)
return -EINVAL; /* this inode is deleted */
inode->i_blocks = le64_to_cpu(raw_inode->i_blocks);
@ -505,9 +503,10 @@ void nilfs_write_inode_common(struct inode *inode,
raw_inode->i_size = cpu_to_le64(inode->i_size);
raw_inode->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
raw_inode->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
raw_inode->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
raw_inode->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
raw_inode->i_blocks = cpu_to_le64(inode->i_blocks);
raw_inode->i_dtime = cpu_to_le64(ii->i_dtime);
raw_inode->i_flags = cpu_to_le32(ii->i_flags);
raw_inode->i_generation = cpu_to_le32(inode->i_generation);

1
fs/nilfs2/nilfs.h
View file

@ -48,7 +48,6 @@ struct nilfs_inode_info {
struct nilfs_bmap *i_bmap;
union nilfs_bmap_union i_bmap_union;
__u64 i_xattr; /* sector_t ??? */
__u32 i_dtime;
__u32 i_dir_start_lookup;
__u64 i_cno; /* check point number for GC inode */
struct address_space i_btnode_cache;

1
fs/nilfs2/super.c
View file

@ -792,6 +792,7 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent,
sb->s_op = &nilfs_sops;
sb->s_export_op = &nilfs_export_ops;
sb->s_root = NULL;
sb->s_time_gran = 1;
if (!nilfs_loaded(nilfs)) {
err = load_nilfs(nilfs, sbi);