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cifs: create a helper function for compound query_info 

and convert statfs to use it.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Ronnie Sahlberg 2018-12-20 22:03:04 -06:00 committed by Steve French
parent 97aa495a89
commit 07d3b2e426
1 changed files with 56 additions and 26 deletions
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82
fs/cifs/smb2ops.c
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@ -960,7 +960,7 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
if (rc)
goto sea_exit;
smb2_set_next_command(ses->server, &rqst[0]);
smb2_set_next_command(ses->server, &rqst[0], 0);
/* Set Info */
@ -987,7 +987,7 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
COMPOUND_FID, current->tgid,
FILE_FULL_EA_INFORMATION,
SMB2_O_INFO_FILE, 0, data, size);
smb2_set_next_command(server, &rqst[1]);
smb2_set_next_command(server, &rqst[1], 0);
smb2_set_related(&rqst[1]);
@ -1837,25 +1837,28 @@ smb2_set_next_command(struct TCP_Server_Info *server, struct smb_rqst *rqst,
shdr->NextCommand = cpu_to_le32(len);
}
/*
* Passes the query info response back to the caller on success.
* Caller need to free this with free_rsp_buf().
*/
static int
smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
struct kstatfs *buf)
smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
__le16 *utf16_path, u32 desired_access,
u32 class, u32 type, u32 output_len,
struct kvec *rsp, int *buftype)
{
struct smb2_query_info_rsp *rsp;
struct smb2_fs_full_size_info *info = NULL;
struct cifs_ses *ses = tcon->ses;
struct TCP_Server_Info *server = ses->server;
int flags = 0;
struct smb_rqst rqst[3];
int resp_buftype[3];
struct kvec rsp_iov[3];
struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
struct kvec qi_iov[1];
struct kvec close_iov[1];
struct cifs_ses *ses = tcon->ses;
struct TCP_Server_Info *server = ses->server;
__le16 srch_path = 0; /* Null - open root of share */
u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
int flags = 0;
int rc;
if (smb3_encryption_required(tcon))
@ -1870,15 +1873,15 @@ smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
oparms.tcon = tcon;
oparms.desired_access = FILE_READ_ATTRIBUTES;
oparms.desired_access = desired_access;
oparms.disposition = FILE_OPEN;
oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &srch_path);
rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
if (rc)
goto qfs_exit;
goto qic_exit;
smb2_set_next_command(server, &rqst[0], 0);
memset(&qi_iov, 0, sizeof(qi_iov));
@ -1886,12 +1889,11 @@ smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
rqst[1].rq_nvec = 1;
rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
FS_FULL_SIZE_INFORMATION,
SMB2_O_INFO_FILESYSTEM, 0,
sizeof(struct smb2_fs_full_size_info), 0,
class, type, 0,
output_len, 0,
NULL);
if (rc)
goto qfs_exit;
goto qic_exit;
smb2_set_next_command(server, &rqst[1], 0);
smb2_set_related(&rqst[1]);
@ -1901,32 +1903,60 @@ smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
if (rc)
goto qfs_exit;
goto qic_exit;
smb2_set_related(&rqst[2]);
rc = compound_send_recv(xid, ses, flags, 3, rqst,
resp_buftype, rsp_iov);
if (rc)
goto qic_exit;
*rsp = rsp_iov[1];
*buftype = resp_buftype[1];
qic_exit:
SMB2_open_free(&rqst[0]);
SMB2_query_info_free(&rqst[1]);
SMB2_close_free(&rqst[2]);
free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
return rc;
}
static int
smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
struct kstatfs *buf)
{
struct smb2_query_info_rsp *rsp;
struct smb2_fs_full_size_info *info = NULL;
__le16 utf16_path = 0; /* Null - open root of share */
struct kvec rsp_iov = {NULL, 0};
int buftype = CIFS_NO_BUFFER;
int rc;
rc = smb2_query_info_compound(xid, tcon, &utf16_path,
FILE_READ_ATTRIBUTES,
FS_FULL_SIZE_INFORMATION,
SMB2_O_INFO_FILESYSTEM,
sizeof(struct smb2_fs_full_size_info),
&rsp_iov, &buftype);
if (rc)
goto qfs_exit;
rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
buf->f_type = SMB2_MAGIC_NUMBER;
info = (struct smb2_fs_full_size_info *)(
le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength),
&rsp_iov[1],
&rsp_iov,
sizeof(struct smb2_fs_full_size_info));
if (!rc)
smb2_copy_fs_info_to_kstatfs(info, buf);
qfs_exit:
SMB2_open_free(&rqst[0]);
SMB2_query_info_free(&rqst[1]);
SMB2_close_free(&rqst[2]);
free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
free_rsp_buf(buftype, rsp_iov.iov_base);
return rc;
}