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[GFS2] Add nanosecond timestamp feature

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This adds a nanosecond timestamp feature to the GFS2 filesystem. Due
to the way that the on-disk format works, older filesystems will just
appear to have this field set to zero. When mounted by an older version
of GFS2, the filesystem will simply ignore the extra fields so that
it will again appear to have whole second resolution, so that its
trivially backward compatible.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse
2007-06-05 09:39:18 +01:00
parent bb8d8a6f54
commit 4bd91ba181
7 changed files with 39 additions and 27 deletions
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fs/gfs2/bmap.c
+5 -5
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@@ -772,7 +772,7 @@ static int do_strip(struct gfs2_inode *ip, struct buffer_head *dibh,
gfs2_free_data(ip, bstart, blen);
}
ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC;
ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;
gfs2_dinode_out(ip, dibh->b_data);
@@ -847,7 +847,7 @@ static int do_grow(struct gfs2_inode *ip, u64 size)
}
ip->i_di.di_size = size;
ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC;
ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;
error = gfs2_meta_inode_buffer(ip, &dibh);
if (error)
@@ -958,7 +958,7 @@ static int trunc_start(struct gfs2_inode *ip, u64 size)
if (gfs2_is_stuffed(ip)) {
ip->i_di.di_size = size;
ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC;
ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
gfs2_dinode_out(ip, dibh->b_data);
gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode) + size);
@@ -970,7 +970,7 @@ static int trunc_start(struct gfs2_inode *ip, u64 size)
if (!error) {
ip->i_di.di_size = size;
ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC;
ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;
ip->i_di.di_flags |= GFS2_DIF_TRUNC_IN_PROG;
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
gfs2_dinode_out(ip, dibh->b_data);
@@ -1043,7 +1043,7 @@ static int trunc_end(struct gfs2_inode *ip)
ip->i_no_addr;
gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
}
ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC;
ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;
ip->i_di.di_flags &= ~GFS2_DIF_TRUNC_IN_PROG;
gfs2_trans_add_bh(ip->i_gl, dibh, 1);