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Query file system attributes from server on SMB2, not just cifs, mounts

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Currently SMB2 and SMB3 mounts do not query the file system attributes
from the server at mount time as is done for cifs.  These can be useful for debugging.

Signed-off-by: Steve French <smfrench@gmail.com>
This commit is contained in:
Steve French 2013-10-09 02:07:00 -05:00
parent 64a5cfa6db
commit 34f626406c
4 changed files with 73 additions and 2 deletions
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3
fs/cifs/cifspdu.h
View File

@ -2215,6 +2215,9 @@ typedef struct {
__le32 DeviceCharacteristics;
} __attribute__((packed)) FILE_SYSTEM_DEVICE_INFO; /* device info level 0x104 */
/* minimum includes first three fields, and empty FS Name */
#define MIN_FS_ATTR_INFO_SIZE 12
typedef struct {
__le32 Attributes;
__le32 MaxPathNameComponentLength;

28
fs/cifs/smb2ops.c
View File

@ -209,6 +209,31 @@ smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
return rsize;
}
static void
smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
{
int rc;
__le16 srch_path = 0; /* Null - open root of share */
u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
if (rc)
return;
SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid);
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
return;
}
static int
smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, const char *full_path)
@ -873,6 +898,7 @@ struct smb_version_operations smb20_operations = {
.logoff = SMB2_logoff,
.tree_connect = SMB2_tcon,
.tree_disconnect = SMB2_tdis,
.qfs_tcon = smb2_qfs_tcon,
.is_path_accessible = smb2_is_path_accessible,
.can_echo = smb2_can_echo,
.echo = SMB2_echo,
@ -945,6 +971,7 @@ struct smb_version_operations smb21_operations = {
.logoff = SMB2_logoff,
.tree_connect = SMB2_tcon,
.tree_disconnect = SMB2_tdis,
.qfs_tcon = smb2_qfs_tcon,
.is_path_accessible = smb2_is_path_accessible,
.can_echo = smb2_can_echo,
.echo = SMB2_echo,
@ -1018,6 +1045,7 @@ struct smb_version_operations smb30_operations = {
.logoff = SMB2_logoff,
.tree_connect = SMB2_tcon,
.tree_disconnect = SMB2_tdis,
.qfs_tcon = smb2_qfs_tcon,
.is_path_accessible = smb2_is_path_accessible,
.can_echo = smb2_can_echo,
.echo = SMB2_echo,

42
fs/cifs/smb2pdu.c
View File

@ -2339,7 +2339,7 @@ SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
if (rc) {
cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
goto qinf_exit;
goto qfsinf_exit;
}
rsp = (struct smb2_query_info_rsp *)iov.iov_base;
@ -2351,7 +2351,45 @@ SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
if (!rc)
copy_fs_info_to_kstatfs(info, fsdata);
qinf_exit:
qfsinf_exit:
free_rsp_buf(resp_buftype, iov.iov_base);
return rc;
}
int
SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_fid, u64 volatile_fid)
{
struct smb2_query_info_rsp *rsp = NULL;
struct kvec iov;
int rc = 0;
int resp_buftype;
struct cifs_ses *ses = tcon->ses;
unsigned int rsp_len, offset;
rc = build_qfs_info_req(&iov, tcon, SMB_QUERY_FS_ATTRIBUTE_INFO,
sizeof(FILE_SYSTEM_ATTRIBUTE_INFO),
persistent_fid, volatile_fid);
if (rc)
return rc;
rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
if (rc) {
cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
goto qfsattr_exit;
}
rsp = (struct smb2_query_info_rsp *)iov.iov_base;
rsp_len = le32_to_cpu(rsp->OutputBufferLength);
offset = le16_to_cpu(rsp->OutputBufferOffset);
rc = validate_buf(offset, rsp_len, &rsp->hdr, MIN_FS_ATTR_INFO_SIZE);
if (!rc) {
memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
+ (char *)&rsp->hdr, min_t(unsigned int,
rsp_len, sizeof(FILE_SYSTEM_ATTRIBUTE_INFO)));
}
qfsattr_exit:
free_rsp_buf(resp_buftype, iov.iov_base);
return rc;
}

2
fs/cifs/smb2proto.h
View File

@ -150,6 +150,8 @@ extern int SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
extern int SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_file_id, u64 volatile_file_id,
struct kstatfs *FSData);
extern int SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_file_id, u64 volatile_file_id);
extern int SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
const __u64 persist_fid, const __u64 volatile_fid,
const __u32 pid, const __u64 length, const __u64 offset,