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| author | Steve French | 2019-04-04 07:41:04 +0200 |
|---|---|---|
| committer | Steve French | 2019-05-08 06:24:54 +0200 |
| commit | 973189aba69e59f11d987c21bd18409e58ece6fd (patch) | |
| tree | c454b0d120af131c2aaedc5fdb297e1f0aca1c8c /fs/cifs/smb2ops.c | |
| parent | CIFS: check CIFS_MOUNT_NO_DFS when trying to reuse existing sb (diff) | |
| download | kernel-qcow2-linux-973189aba69e59f11d987c21bd18409e58ece6fd.tar.gz kernel-qcow2-linux-973189aba69e59f11d987c21bd18409e58ece6fd.tar.xz kernel-qcow2-linux-973189aba69e59f11d987c21bd18409e58ece6fd.zip | |
SMB3: update comment to clarify enumerating snapshots
Trivial update to comment suggested by Pavel.
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/smb2ops.c')
| -rw-r--r-- | fs/cifs/smb2ops.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index c36ff0d1fe2a..ab4737e3c31f 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -1821,6 +1821,14 @@ smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, u32 max_response_size; struct smb_snapshot_array snapshot_in; + /* + * On the first query to enumerate the list of snapshots available + * for this volume the buffer begins with 0 (number of snapshots + * which can be returned is zero since at that point we do not know + * how big the buffer needs to be). On the second query, + * it (ret_data_len) is set to number of snapshots so we can + * know to set the maximum response size larger (see below). + */ if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) return -EFAULT; |