linux-kernel - [PATCH 6/6] fsconfig: rename FSCONFIG_CMD_CREATE to FSCONFIG_CMD

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Date:   Thu, 20 Sep 2018 17:12:14 +0200
From:   Miklos Szeredi <mszeredi@...hat.com>
To:     David Howells <dhowells@...hat.com>
Cc:     Al Viro <viro@...IV.linux.org.uk>, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 6/6] fsconfig: rename FSCONFIG_CMD_CREATE to FSCONFIG_CMD_OBTAIN

The old name strongly implies that a new superblock will be created from
the fs_context.  This is not true: filesystems are free to retuse an
existing superblock and return that (for good reason).

To avoid confusion, rename this command to something more appropriate.

Signed-off-by: Miklos Szeredi <mszeredi@...hat.com>
---
 fs/fsopen.c                | 6 +++---
 include/uapi/linux/fs.h    | 2 +-
 samples/vfs/test-fsmount.c | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/fs/fsopen.c b/fs/fsopen.c
index 9ead9220e2cb..bf1ff70b1fe2 100644
--- a/fs/fsopen.c
+++ b/fs/fsopen.c
@@ -311,7 +311,7 @@ static int vfs_fsconfig_action(struct fs_context *fc, enum fsconfig_command cmd)
 	int ret = -EINVAL;
 
 	switch (cmd) {
-	case FSCONFIG_CMD_CREATE:
+	case FSCONFIG_CMD_OBTAIN:
 		if (fc->phase != FS_CONTEXT_CREATE_PARAMS)
 			return -EBUSY;
 		fc->phase = FS_CONTEXT_CREATING;
@@ -434,7 +434,7 @@ SYSCALL_DEFINE5(fsconfig,
 		if (!_key || _value || aux < 0)
 			return -EINVAL;
 		break;
-	case FSCONFIG_CMD_CREATE:
+	case FSCONFIG_CMD_OBTAIN:
 	case FSCONFIG_CMD_RECONFIGURE:
 		if (_key || _value || aux)
 			return -EINVAL;
@@ -523,7 +523,7 @@ SYSCALL_DEFINE5(fsconfig,
 	ret = mutex_lock_interruptible(&fc->uapi_mutex);
 	if (ret == 0) {
 		switch (cmd) {
-		case FSCONFIG_CMD_CREATE:
+		case FSCONFIG_CMD_OBTAIN:
 		case FSCONFIG_CMD_RECONFIGURE:
 			ret = vfs_fsconfig_action(fc, cmd);
 			break;
diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
index 7f01503a9e9b..169642bb2656 100644
--- a/include/uapi/linux/fs.h
+++ b/include/uapi/linux/fs.h
@@ -366,7 +366,7 @@ enum fsconfig_command {
 	FSCONFIG_SET_PATH	= 3,	/* Set parameter, supplying an object by path */
 	FSCONFIG_SET_PATH_EMPTY	= 4,	/* Set parameter, supplying an object by (empty) path */
 	FSCONFIG_SET_FD		= 5,	/* Set parameter, supplying an object by fd */
-	FSCONFIG_CMD_CREATE	= 6,	/* Invoke superblock creation */
+	FSCONFIG_CMD_OBTAIN	= 6,	/* Obtain new or existing superblock */
 	FSCONFIG_CMD_RECONFIGURE = 7,	/* Invoke superblock reconfiguration */
 };
 
diff --git a/samples/vfs/test-fsmount.c b/samples/vfs/test-fsmount.c
index 74124025ade0..a161dc530a91 100644
--- a/samples/vfs/test-fsmount.c
+++ b/samples/vfs/test-fsmount.c
@@ -101,7 +101,7 @@ int main(int argc, char *argv[])
 	}
 
 	E_fsconfig(fsfd, FSCONFIG_SET_STRING, "source", "#grand.central.org:root.cell.", 0);
-	E_fsconfig(fsfd, FSCONFIG_CMD_CREATE, NULL, NULL, 0);
+	E_fsconfig(fsfd, FSCONFIG_CMD_OBTAIN, NULL, NULL, 0);
 
 	mfd = fsmount(fsfd, 0, MS_RDONLY);
 	if (mfd < 0)
-- 
2.14.3