Hi,

This patch adds an "unstuff" variable to function do_grow to
determine whether unstuff was warranted. This will make it
easier in the future to re-combine qadata with the reservations
structure, once its lifespan has been expanded.

Regards,

Bob Peterson
Red Hat GFS

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
--
Author: Bob Peterson <rpeterso@redhat.com>
Date: Thu Apr 12 09:04:18 2012 -0500

GFS2: Use variable rather than qa to determine if unstuff necessary

In the future, the qadata structure will be eliminated and merged
back in with the block reservation structure, after we extend the
lifespan of that. This patch is a step forward in eliminating the
qadata structure. It adds a variable to the do_grow function to
determine when unstuffing is necessary, and has been done.

diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 03c04fe..420bbeb 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -1169,6 +1169,7 @@ static int do_grow(struct inode *inode, u64 size)
struct buffer_head *dibh;
struct gfs2_qadata *qa = NULL;
int error;
+ int unstuff = 0;

if (gfs2_is_stuffed(ip) &&
(size > (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode)))) {
@@ -1183,13 +1184,14 @@ static int do_grow(struct inode *inode, u64 size)
error = gfs2_inplace_reserve(ip, 1);
if (error)
goto do_grow_qunlock;
+ unstuff = 1;
}

error = gfs2_trans_begin(sdp, RES_DINODE + RES_STATFS + RES_RG_BIT, 0);
if (error)
goto do_grow_release;

- if (qa) {
+ if (unstuff) {
error = gfs2_unstuff_dinode(ip, NULL);
if (error)
goto do_end_trans;
@@ -1208,7 +1210,7 @@ static int do_grow(struct inode *inode, u64 size)
do_end_trans:
gfs2_trans_end(sdp);
do_grow_release:
- if (qa) {
+ if (unstuff) {
gfs2_inplace_release(ip);
do_grow_qunlock:
gfs2_quota_unlock(ip);

From: Bob Peterson <rpeterso@redhat.com>

In the future, the qadata structure will be eliminated and merged
back in with the block reservation structure, after we extend the
lifespan of that. This patch is a step forward in eliminating the
qadata structure. It adds a variable to the do_grow function to
determine when unstuffing is necessary, and has been done.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 03c04fe..420bbeb 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -1169,6 +1169,7 @@ static int do_grow(struct inode *inode, u64 size)
struct buffer_head *dibh;
struct gfs2_qadata *qa = NULL;
int error;
+ int unstuff = 0;

if (gfs2_is_stuffed(ip) &&
(size > (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode)))) {
@@ -1183,13 +1184,14 @@ static int do_grow(struct inode *inode, u64 size)
error = gfs2_inplace_reserve(ip, 1);
if (error)
goto do_grow_qunlock;
+ unstuff = 1;
}

error = gfs2_trans_begin(sdp, RES_DINODE + RES_STATFS + RES_RG_BIT, 0);
if (error)
goto do_grow_release;

- if (qa) {
+ if (unstuff) {
error = gfs2_unstuff_dinode(ip, NULL);
if (error)
goto do_end_trans;
@@ -1208,7 +1210,7 @@ static int do_grow(struct inode *inode, u64 size)
do_end_trans:
gfs2_trans_end(sdp);
do_grow_release:
- if (qa) {
+ if (unstuff) {
gfs2_inplace_release(ip);
do_grow_qunlock:
gfs2_quota_unlock(ip);
--
1.7.4