[Cluster-devel] [PATCH 0/3] gfs2_(un)link cleanups

[Cluster-devel] [PATCH 0/3] gfs2_(un)link cleanups

[Andrew Price]

Some trivial cleanups from my O_TMPFILE branch. That work isn't ready
yet but there was no reason not to send these patches.

Andy

Andrew Price (3):
  gfs2: Remove duplicate i_nlink check from gfs2_link()
  gfs2: Remove ghs[] from gfs2_link
  gfs2: Remove ghs[] from gfs2_unlink

 fs/gfs2/inode.c | 47 ++++++++++++++++++++++-------------------------
 1 file changed, 22 insertions(+), 25 deletions(-)

-- 
2.39.2

[Cluster-devel] [PATCH 1/3] gfs2: Remove duplicate i_nlink check from gfs2_link()

[Andrew Price]

The duplication is:

    struct gfs2_inode *ip = GFS2_I(inode);
    [...]
    error = -ENOENT;
    if (inode->i_nlink == 0)
        goto out_gunlock;
    [...]
    error = -EINVAL;
    if (!ip->i_inode.i_nlink)
        goto out_gunlock;

The second check is removed. ENOENT is the correct error code for
attempts to link a deleted inode (ref: link(2)).

If we support O_TMPFILE in future the check will need to be updated with
an exception for inodes flagged I_LINKABLE so sorting out this
duplication now will make it a slightly cleaner change.

Signed-off-by: Andrew Price <anprice@redhat.com>
---
 fs/gfs2/inode.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 1291b5ee3584..79eef9a0ebfc 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -992,9 +992,6 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
 	error = -EPERM;
 	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
 		goto out_gunlock;
-	error = -EINVAL;
-	if (!ip->i_inode.i_nlink)
-		goto out_gunlock;
 	error = -EMLINK;
 	if (ip->i_inode.i_nlink == (u32)-1)
 		goto out_gunlock;
-- 
2.39.2

[Cluster-devel] [PATCH 2/3] gfs2: Remove ghs[] from gfs2_link

[Andrew Price]

Replace the 2-item array with two variables for readability.

Signed-off-by: Andrew Price <anprice@redhat.com>
---
 fs/gfs2/inode.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 79eef9a0ebfc..9850267b9951 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -941,7 +941,7 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
 	struct gfs2_sbd *sdp = GFS2_SB(dir);
 	struct inode *inode = d_inode(old_dentry);
 	struct gfs2_inode *ip = GFS2_I(inode);
-	struct gfs2_holder ghs[2];
+	struct gfs2_holder d_gh, gh;
 	struct buffer_head *dibh;
 	struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
 	int error;
@@ -953,14 +953,14 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
 	if (error)
 		return error;
 
-	gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
-	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
+	gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, &d_gh);
+	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
 
-	error = gfs2_glock_nq(ghs); /* parent */
+	error = gfs2_glock_nq(&d_gh);
 	if (error)
 		goto out_parent;
 
-	error = gfs2_glock_nq(ghs + 1); /* child */
+	error = gfs2_glock_nq(&gh);
 	if (error)
 		goto out_child;
 
@@ -1046,13 +1046,13 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
 		gfs2_quota_unlock(dip);
 out_gunlock:
 	gfs2_dir_no_add(&da);
-	gfs2_glock_dq(ghs + 1);
+	gfs2_glock_dq(&gh);
 out_child:
-	gfs2_glock_dq(ghs);
+	gfs2_glock_dq(&d_gh);
 out_parent:
 	gfs2_qa_put(dip);
-	gfs2_holder_uninit(ghs);
-	gfs2_holder_uninit(ghs + 1);
+	gfs2_holder_uninit(&d_gh);
+	gfs2_holder_uninit(&gh);
 	return error;
 }
 
-- 
2.39.2

[Cluster-devel] [PATCH 3/3] gfs2: Remove ghs[] from gfs2_unlink

[Andrew Price]

Replace the 3-item array with three variables for readability.

Signed-off-by: Andrew Price <anprice@redhat.com>
---
 fs/gfs2/inode.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 9850267b9951..17c994a0c0d0 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -1143,7 +1143,7 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
 	struct gfs2_sbd *sdp = GFS2_SB(dir);
 	struct inode *inode = d_inode(dentry);
 	struct gfs2_inode *ip = GFS2_I(inode);
-	struct gfs2_holder ghs[3];
+	struct gfs2_holder d_gh, r_gh, gh;
 	struct gfs2_rgrpd *rgd;
 	int error;
 
@@ -1153,21 +1153,21 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
 
 	error = -EROFS;
 
-	gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
-	gfs2_holder_init(ip->i_gl,  LM_ST_EXCLUSIVE, 0, ghs + 1);
+	gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, &d_gh);
+	gfs2_holder_init(ip->i_gl,  LM_ST_EXCLUSIVE, 0, &gh);
 
 	rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
 	if (!rgd)
 		goto out_inodes;
 
-	gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, LM_FLAG_NODE_SCOPE, ghs + 2);
+	gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, LM_FLAG_NODE_SCOPE, &r_gh);
 
 
-	error = gfs2_glock_nq(ghs); /* parent */
+	error = gfs2_glock_nq(&d_gh);
 	if (error)
 		goto out_parent;
 
-	error = gfs2_glock_nq(ghs + 1); /* child */
+	error = gfs2_glock_nq(&gh);
 	if (error)
 		goto out_child;
 
@@ -1181,7 +1181,7 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
 			goto out_rgrp;
 	}
 
-	error = gfs2_glock_nq(ghs + 2); /* rgrp */
+	error = gfs2_glock_nq(&r_gh); /* rgrp */
 	if (error)
 		goto out_rgrp;
 
@@ -1197,16 +1197,16 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
 	gfs2_trans_end(sdp);
 
 out_gunlock:
-	gfs2_glock_dq(ghs + 2);
+	gfs2_glock_dq(&r_gh);
 out_rgrp:
-	gfs2_glock_dq(ghs + 1);
+	gfs2_glock_dq(&gh);
 out_child:
-	gfs2_glock_dq(ghs);
+	gfs2_glock_dq(&d_gh);
 out_parent:
-	gfs2_holder_uninit(ghs + 2);
+	gfs2_holder_uninit(&r_gh);
 out_inodes:
-	gfs2_holder_uninit(ghs + 1);
-	gfs2_holder_uninit(ghs);
+	gfs2_holder_uninit(&gh);
+	gfs2_holder_uninit(&d_gh);
 	return error;
 }
 
-- 
2.39.2

[Cluster-devel] [PATCH 0/3] gfs2_(un)link cleanups

[Andreas Gruenbacher]

On Tue, Mar 14, 2023 at 2:18?PM Andrew Price <anprice@redhat.com> wrote:
> Some trivial cleanups from my O_TMPFILE branch. That work isn't ready
> yet but there was no reason not to send these patches.

Applied, thanks.

Andreas