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Message-Id: <20220607164950.089796084@linuxfoundation.org>
Date: Tue, 7 Jun 2022 19:02:58 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Anna Schumaker <Anna.Schumaker@...app.com>,
Trond Myklebust <trond.myklebust@...merspace.com>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 513/667] NFS: Create a new nfs_alloc_fattr_with_label() function
From: Anna Schumaker <Anna.Schumaker@...app.com>
[ Upstream commit d755ad8dc752d44545613ea04d660aed674e540d ]
For creating fattrs with the label field already allocated for us. I
also update nfs_free_fattr() to free the label in the end.
Signed-off-by: Anna Schumaker <Anna.Schumaker@...app.com>
Signed-off-by: Trond Myklebust <trond.myklebust@...merspace.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
fs/nfs/getroot.c | 17 ++++++-----------
fs/nfs/inode.c | 17 +++++++++++++++++
fs/nfs/internal.h | 9 ---------
include/linux/nfs_fs.h | 13 +++++++++++++
4 files changed, 36 insertions(+), 20 deletions(-)
diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index 59355c106ece..7604cb6a0ac2 100644
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -80,18 +80,15 @@ int nfs_get_root(struct super_block *s, struct fs_context *fc)
goto out;
/* get the actual root for this mount */
- fsinfo.fattr = nfs_alloc_fattr();
+ fsinfo.fattr = nfs_alloc_fattr_with_label(server);
if (fsinfo.fattr == NULL)
goto out_name;
- fsinfo.fattr->label = nfs4_label_alloc(server, GFP_KERNEL);
- if (IS_ERR(fsinfo.fattr->label))
- goto out_fattr;
error = server->nfs_client->rpc_ops->getroot(server, ctx->mntfh, &fsinfo);
if (error < 0) {
dprintk("nfs_get_root: getattr error = %d\n", -error);
nfs_errorf(fc, "NFS: Couldn't getattr on root");
- goto out_label;
+ goto out_fattr;
}
inode = nfs_fhget(s, ctx->mntfh, fsinfo.fattr, NULL);
@@ -99,12 +96,12 @@ int nfs_get_root(struct super_block *s, struct fs_context *fc)
dprintk("nfs_get_root: get root inode failed\n");
error = PTR_ERR(inode);
nfs_errorf(fc, "NFS: Couldn't get root inode");
- goto out_label;
+ goto out_fattr;
}
error = nfs_superblock_set_dummy_root(s, inode);
if (error != 0)
- goto out_label;
+ goto out_fattr;
/* root dentries normally start off anonymous and get spliced in later
* if the dentry tree reaches them; however if the dentry already
@@ -115,7 +112,7 @@ int nfs_get_root(struct super_block *s, struct fs_context *fc)
dprintk("nfs_get_root: get root dentry failed\n");
error = PTR_ERR(root);
nfs_errorf(fc, "NFS: Couldn't get root dentry");
- goto out_label;
+ goto out_fattr;
}
security_d_instantiate(root, inode);
@@ -154,8 +151,6 @@ int nfs_get_root(struct super_block *s, struct fs_context *fc)
nfs_setsecurity(inode, fsinfo.fattr, fsinfo.fattr->label);
error = 0;
-out_label:
- nfs4_label_free(fsinfo.fattr->label);
out_fattr:
nfs_free_fattr(fsinfo.fattr);
out_name:
@@ -165,5 +160,5 @@ int nfs_get_root(struct super_block *s, struct fs_context *fc)
error_splat_root:
dput(fc->root);
fc->root = NULL;
- goto out_label;
+ goto out_fattr;
}
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 4ed75673adf6..b60c57f6f723 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1589,6 +1589,23 @@ struct nfs_fattr *nfs_alloc_fattr(void)
}
EXPORT_SYMBOL_GPL(nfs_alloc_fattr);
+struct nfs_fattr *nfs_alloc_fattr_with_label(struct nfs_server *server)
+{
+ struct nfs_fattr *fattr = nfs_alloc_fattr();
+
+ if (!fattr)
+ return NULL;
+
+ fattr->label = nfs4_label_alloc(server, GFP_NOFS);
+ if (IS_ERR(fattr->label)) {
+ kfree(fattr);
+ return NULL;
+ }
+
+ return fattr;
+}
+EXPORT_SYMBOL_GPL(nfs_alloc_fattr_with_label);
+
struct nfs_fh *nfs_alloc_fhandle(void)
{
struct nfs_fh *fh;
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index fbfe293af72c..2ceb4b98ec15 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -351,14 +351,6 @@ nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
return dst;
}
-static inline void nfs4_label_free(struct nfs4_label *label)
-{
- if (label) {
- kfree(label->label);
- kfree(label);
- }
- return;
-}
static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
{
@@ -367,7 +359,6 @@ static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
}
#else
static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
-static inline void nfs4_label_free(void *label) {}
static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
{
}
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 5ffcde9ac413..66b6cc24ab8c 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -421,9 +421,22 @@ extern void nfs_fattr_set_barrier(struct nfs_fattr *fattr);
extern unsigned long nfs_inc_attr_generation_counter(void);
extern struct nfs_fattr *nfs_alloc_fattr(void);
+extern struct nfs_fattr *nfs_alloc_fattr_with_label(struct nfs_server *server);
+
+static inline void nfs4_label_free(struct nfs4_label *label)
+{
+#ifdef CONFIG_NFS_V4_SECURITY_LABEL
+ if (label) {
+ kfree(label->label);
+ kfree(label);
+ }
+#endif
+}
static inline void nfs_free_fattr(const struct nfs_fattr *fattr)
{
+ if (fattr)
+ nfs4_label_free(fattr->label);
kfree(fattr);
}
--
2.35.1
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