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cifs: add IOCTL for QUERY_INFO passthrough to userspace

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This allows userspace tools to query the raw info levels for cifs files
and process the response in userspace.
In particular this is useful for many of those data where there is no
corresponding native data structure in linux.
For example querying the security descriptor for a file and extract the
SIDs.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Ronnie Sahlberg
2018-10-07 19:19:58 -05:00
committed by Steve French
parent 8c1beb9801
commit f5b05d622a
7 changed files with 134 additions and 11 deletions
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2
fs/cifs/smb2inode.c
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@@ -110,7 +110,7 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
COMPOUND_FID, FILE_ALL_INFORMATION,
SMB2_O_INFO_FILE, 0,
sizeof(struct smb2_file_all_info) +
PATH_MAX * 2);
PATH_MAX * 2, 0, NULL);
smb2_set_next_command(server, &rqst[num_rqst]);
smb2_set_related(&rqst[num_rqst++]);
break;