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| author |   Steve French <smfrench@gmail.com> | 2016-09-30 21:14:26 -0500 |
|---|---|---|
| committer | Steve French <smfrench@gmail.com> | 2016-10-13 19:48:11 -0500 |
| commit | 834170c85978b0e85805364f623393968f7a9b5e (patch) | |
| tree | 92f80f9bdd84120a4aecacd3a8f8e06ec65079bc /fs/cifs/ioctl.c | |
| parent | Do not send SMB3 SET_INFO request if nothing is changing (diff) | |
| download | linux-dev-834170c85978b0e85805364f623393968f7a9b5e.tar.xz linux-dev-834170c85978b0e85805364f623393968f7a9b5e.zip | |
Enable previous version support
Add ioctl to query previous versions of file
Allows listing snapshots on files on SMB3 mounts.
Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/ioctl.c')
| -rw-r--r-- | fs/cifs/ioctl.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c index 7a3b84e300f8..9f51b81119f2 100644 --- a/fs/cifs/ioctl.c +++ b/fs/cifs/ioctl.c @@ -189,7 +189,7 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) xid = get_xid(); cifs_sb = CIFS_SB(inode->i_sb); - + cifs_dbg(VFS, "cifs ioctl 0x%x\n", command); switch (command) { case FS_IOC_GETFLAGS: if (pSMBFile == NULL) @@ -267,11 +267,23 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) tcon = tlink_tcon(pSMBFile->tlink); rc = smb_mnt_get_fsinfo(xid, tcon, (void __user *)arg); break; + case CIFS_ENUMERATE_SNAPSHOTS: + if (arg == 0) { + rc = -EINVAL; + goto cifs_ioc_exit; + } + tcon = tlink_tcon(pSMBFile->tlink); + if (tcon->ses->server->ops->enum_snapshots) + rc = tcon->ses->server->ops->enum_snapshots(xid, tcon, + pSMBFile, (void __user *)arg); + else + rc = -EOPNOTSUPP; + break; default: cifs_dbg(FYI, "unsupported ioctl\n"); break; } - +cifs_ioc_exit: free_xid(xid); return rc; } |