9p fid refcount: add p9_fid_get/put wrappers
I was recently reminded that it is not clear that p9_client_clunk()
was actually just decrementing refcount and clunking only when that
reaches zero: make it clear through a set of helpers.
This will also allow instrumenting refcounting better for debugging
next patch
Link: https://lkml.kernel.org/r/20220612085330.1451496-5-asmadeus@codewreck.org
Reviewed-by: Tyler Hicks <tyhicks@linux.microsoft.com>
Reviewed-by: Christian Schoenebeck <linux_oss@crudebyte.com>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 3d82977..bde1877 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -400,7 +400,7 @@ void v9fs_evict_inode(struct inode *inode)
fscache_relinquish_cookie(v9fs_inode_cookie(v9inode), false);
/* clunk the fid stashed in writeback_fid */
if (v9inode->writeback_fid) {
- p9_client_clunk(v9inode->writeback_fid);
+ p9_fid_put(v9inode->writeback_fid);
v9inode->writeback_fid = NULL;
}
}
@@ -569,7 +569,7 @@ static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags)
if (v9fs_proto_dotl(v9ses))
retval = p9_client_unlinkat(dfid, dentry->d_name.name,
v9fs_at_to_dotl_flags(flags));
- p9_client_clunk(dfid);
+ p9_fid_put(dfid);
if (retval == -EOPNOTSUPP) {
/* Try the one based on path */
v9fid = v9fs_fid_clone(dentry);
@@ -633,14 +633,14 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
if (IS_ERR(ofid)) {
err = PTR_ERR(ofid);
p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
- p9_client_clunk(dfid);
+ p9_fid_put(dfid);
return ERR_PTR(err);
}
err = p9_client_fcreate(ofid, name, perm, mode, extension);
if (err < 0) {
p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err);
- p9_client_clunk(dfid);
+ p9_fid_put(dfid);
goto error;
}
@@ -652,7 +652,7 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
p9_debug(P9_DEBUG_VFS,
"p9_client_walk failed %d\n", err);
fid = NULL;
- p9_client_clunk(dfid);
+ p9_fid_put(dfid);
goto error;
}
/*
@@ -663,20 +663,20 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
err = PTR_ERR(inode);
p9_debug(P9_DEBUG_VFS,
"inode creation failed %d\n", err);
- p9_client_clunk(dfid);
+ p9_fid_put(dfid);
goto error;
}
v9fs_fid_add(dentry, fid);
d_instantiate(dentry, inode);
}
- p9_client_clunk(dfid);
+ p9_fid_put(dfid);
return ofid;
error:
if (ofid)
- p9_client_clunk(ofid);
+ p9_fid_put(ofid);
if (fid)
- p9_client_clunk(fid);
+ p9_fid_put(fid);
return ERR_PTR(err);
}
@@ -708,7 +708,7 @@ v9fs_vfs_create(struct user_namespace *mnt_userns, struct inode *dir,
return PTR_ERR(fid);
v9fs_invalidate_inode_attr(dir);
- p9_client_clunk(fid);
+ p9_fid_put(fid);
return 0;
}
@@ -744,7 +744,7 @@ static int v9fs_vfs_mkdir(struct user_namespace *mnt_userns, struct inode *dir,
}
if (fid)
- p9_client_clunk(fid);
+ p9_fid_put(fid);
return err;
}
@@ -785,7 +785,7 @@ struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
*/
name = dentry->d_name.name;
fid = p9_client_walk(dfid, 1, &name, 1);
- p9_client_clunk(dfid);
+ p9_fid_put(dfid);
if (fid == ERR_PTR(-ENOENT))
inode = NULL;
else if (IS_ERR(fid))
@@ -808,7 +808,7 @@ struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
else if (!IS_ERR(res))
v9fs_fid_add(res, fid);
else
- p9_client_clunk(fid);
+ p9_fid_put(fid);
}
return res;
}
@@ -891,7 +891,7 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
error:
if (fid)
- p9_client_clunk(fid);
+ p9_fid_put(fid);
goto out;
}
@@ -959,7 +959,7 @@ v9fs_vfs_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
dfid = v9fs_parent_fid(old_dentry);
olddirfid = clone_fid(dfid);
if (dfid && !IS_ERR(dfid))
- p9_client_clunk(dfid);
+ p9_fid_put(dfid);
if (IS_ERR(olddirfid)) {
retval = PTR_ERR(olddirfid);
@@ -968,7 +968,7 @@ v9fs_vfs_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
dfid = v9fs_parent_fid(new_dentry);
newdirfid = clone_fid(dfid);
- p9_client_clunk(dfid);
+ p9_fid_put(dfid);
if (IS_ERR(newdirfid)) {
retval = PTR_ERR(newdirfid);
@@ -1020,13 +1020,13 @@ v9fs_vfs_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
d_move(old_dentry, new_dentry);
}
up_write(&v9ses->rename_sem);
- p9_client_clunk(newdirfid);
+ p9_fid_put(newdirfid);
clunk_olddir:
- p9_client_clunk(olddirfid);
+ p9_fid_put(olddirfid);
done:
- p9_client_clunk(oldfid);
+ p9_fid_put(oldfid);
return retval;
}
@@ -1060,7 +1060,7 @@ v9fs_vfs_getattr(struct user_namespace *mnt_userns, const struct path *path,
return PTR_ERR(fid);
st = p9_client_stat(fid);
- p9_client_clunk(fid);
+ p9_fid_put(fid);
if (IS_ERR(st))
return PTR_ERR(st);
@@ -1136,7 +1136,7 @@ static int v9fs_vfs_setattr(struct user_namespace *mnt_userns,
retval = p9_client_wstat(fid, &wstat);
if (use_dentry)
- p9_client_clunk(fid);
+ p9_fid_put(fid);
if (retval < 0)
return retval;
@@ -1261,7 +1261,7 @@ static const char *v9fs_vfs_get_link(struct dentry *dentry,
return ERR_CAST(fid);
st = p9_client_stat(fid);
- p9_client_clunk(fid);
+ p9_fid_put(fid);
if (IS_ERR(st))
return ERR_CAST(st);
@@ -1308,7 +1308,7 @@ static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
return PTR_ERR(fid);
v9fs_invalidate_inode_attr(dir);
- p9_client_clunk(fid);
+ p9_fid_put(fid);
return 0;
}
@@ -1364,7 +1364,7 @@ v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
v9fs_refresh_inode(oldfid, d_inode(old_dentry));
v9fs_invalidate_inode_attr(dir);
}
- p9_client_clunk(oldfid);
+ p9_fid_put(oldfid);
return retval;
}
