linux-kernel - [PATCH v3 2/3] fs/ntfs3: Remove locked argument in ntfs_set

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Message-ID: <7584e179-eade-fef9-9da1-39cbb4d1ef32@paragon-software.com>
Date:   Wed, 29 Sep 2021 19:50:21 +0300
From:   Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
To:     <ntfs3@...ts.linux.dev>
CC:     <linux-kernel@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>,
        <kari.argillander@...il.com>
Subject: [PATCH v3 2/3] fs/ntfs3: Remove locked argument in ntfs_set_ea

We always need to lock now, because locks became smaller
(see d562e901f25d
"fs/ntfs3: Move ni_lock_dir and ni_unlock into ntfs_create_inode").

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
---
 fs/ntfs3/xattr.c | 29 ++++++++++++++---------------
 1 file changed, 14 insertions(+), 15 deletions(-)

diff --git a/fs/ntfs3/xattr.c b/fs/ntfs3/xattr.c
index 253a07d9aa7b..29f571b53083 100644
--- a/fs/ntfs3/xattr.c
+++ b/fs/ntfs3/xattr.c
@@ -257,7 +257,7 @@ static int ntfs_get_ea(struct inode *inode, const char *name, size_t name_len,
 
 static noinline int ntfs_set_ea(struct inode *inode, const char *name,
 				size_t name_len, const void *value,
-				size_t val_size, int flags, int locked)
+				size_t val_size, int flags)
 {
 	struct ntfs_inode *ni = ntfs_i(inode);
 	struct ntfs_sb_info *sbi = ni->mi.sbi;
@@ -276,8 +276,7 @@ static noinline int ntfs_set_ea(struct inode *inode, const char *name,
 	u64 new_sz;
 	void *p;
 
-	if (!locked)
-		ni_lock(ni);
+	ni_lock(ni);
 
 	run_init(&ea_run);
 
@@ -465,8 +464,7 @@ static noinline int ntfs_set_ea(struct inode *inode, const char *name,
 	mark_inode_dirty(&ni->vfs_inode);
 
 out:
-	if (!locked)
-		ni_unlock(ni);
+	ni_unlock(ni);
 
 	run_close(&ea_run);
 	kfree(ea_all);
@@ -537,7 +535,7 @@ struct posix_acl *ntfs_get_acl(struct inode *inode, int type)
 
 static noinline int ntfs_set_acl_ex(struct user_namespace *mnt_userns,
 				    struct inode *inode, struct posix_acl *acl,
-				    int type, int locked)
+				    int type)
 {
 	const char *name;
 	size_t size, name_len;
@@ -594,7 +592,7 @@ static noinline int ntfs_set_acl_ex(struct user_namespace *mnt_userns,
 		flags = 0;
 	}
 
-	err = ntfs_set_ea(inode, name, name_len, value, size, flags, locked);
+	err = ntfs_set_ea(inode, name, name_len, value, size, flags);
 	if (err == -ENODATA && !size)
 		err = 0; /* Removing non existed xattr. */
 	if (!err)
@@ -612,7 +610,7 @@ static noinline int ntfs_set_acl_ex(struct user_namespace *mnt_userns,
 int ntfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
 		 struct posix_acl *acl, int type)
 {
-	return ntfs_set_acl_ex(mnt_userns, inode, acl, type, 0);
+	return ntfs_set_acl_ex(mnt_userns, inode, acl, type);
 }
 
 static int ntfs_xattr_get_acl(struct user_namespace *mnt_userns,
@@ -693,7 +691,7 @@ int ntfs_init_acl(struct user_namespace *mnt_userns, struct inode *inode,
 
 	if (default_acl) {
 		err = ntfs_set_acl_ex(mnt_userns, inode, default_acl,
-				      ACL_TYPE_DEFAULT, 1);
+				      ACL_TYPE_DEFAULT);
 		posix_acl_release(default_acl);
 	} else {
 		inode->i_default_acl = NULL;
@@ -704,7 +702,7 @@ int ntfs_init_acl(struct user_namespace *mnt_userns, struct inode *inode,
 	else {
 		if (!err)
 			err = ntfs_set_acl_ex(mnt_userns, inode, acl,
-					      ACL_TYPE_ACCESS, 1);
+					      ACL_TYPE_ACCESS);
 		posix_acl_release(acl);
 	}
 
@@ -988,7 +986,7 @@ static noinline int ntfs_setxattr(const struct xattr_handler *handler,
 	}
 #endif
 	/* Deal with NTFS extended attribute. */
-	err = ntfs_set_ea(inode, name, name_len, value, size, flags, 0);
+	err = ntfs_set_ea(inode, name, name_len, value, size, flags);
 
 out:
 	return err;
@@ -1004,28 +1002,29 @@ int ntfs_save_wsl_perm(struct inode *inode)
 	int err;
 	__le32 value;
 
+	/* TODO: refactor this, so we don't lock 4 times in ntfs_set_ea */
 	value = cpu_to_le32(i_uid_read(inode));
 	err = ntfs_set_ea(inode, "$LXUID", sizeof("$LXUID") - 1, &value,
-			  sizeof(value), 0, 0);
+			  sizeof(value), 0);
 	if (err)
 		goto out;
 
 	value = cpu_to_le32(i_gid_read(inode));
 	err = ntfs_set_ea(inode, "$LXGID", sizeof("$LXGID") - 1, &value,
-			  sizeof(value), 0, 0);
+			  sizeof(value), 0);
 	if (err)
 		goto out;
 
 	value = cpu_to_le32(inode->i_mode);
 	err = ntfs_set_ea(inode, "$LXMOD", sizeof("$LXMOD") - 1, &value,
-			  sizeof(value), 0, 0);
+			  sizeof(value), 0);
 	if (err)
 		goto out;
 
 	if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
 		value = cpu_to_le32(inode->i_rdev);
 		err = ntfs_set_ea(inode, "$LXDEV", sizeof("$LXDEV") - 1, &value,
-				  sizeof(value), 0, 0);
+				  sizeof(value), 0);
 		if (err)
 			goto out;
 	}
-- 
2.33.0