Save a roundtrip by getting the reparse point tag and buffer at once
in ->query_reparse_point() and then pass the buffer down to
->query_symlink().
Signed-off-by: Paulo Alcantara (SUSE) <pc@xxxxxxxxxxxxx>
---
fs/smb/client/cifsglob.h | 20 +++--
fs/smb/client/inode.c | 19 +++--
fs/smb/client/smb1ops.c | 11 ++-
fs/smb/client/smb2ops.c | 166 ++++++---------------------------------
4 files changed, 55 insertions(+), 161 deletions(-)
diff --git a/fs/smb/client/cifsglob.h b/fs/smb/client/cifsglob.h
index 95e62502cb01..639a61417b08 100644
--- a/fs/smb/client/cifsglob.h
+++ b/fs/smb/client/cifsglob.h
@@ -336,10 +336,13 @@ struct smb_version_operations {
/* query file data from the server */
int (*query_file_info)(const unsigned int xid, struct cifs_tcon *tcon,
struct cifsFileInfo *cfile, struct cifs_open_info_data *data);
- /* query reparse tag from srv to determine which type of special file */
- int (*query_reparse_tag)(const unsigned int xid, struct cifs_tcon *tcon,
- struct cifs_sb_info *cifs_sb, const char *path,
- __u32 *reparse_tag);
+ /* query reparse point to determine which type of special file */
+ int (*query_reparse_point)(const unsigned int xid,
+ struct cifs_tcon *tcon,
+ struct cifs_sb_info *cifs_sb,
+ const char *full_path,
+ u32 *tag, struct kvec *rsp,
+ int *rsp_buftype);
/* get server index number */
int (*get_srv_inum)(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, const char *full_path, u64 *uniqueid,
@@ -388,9 +391,12 @@ struct smb_version_operations {
const char *, const char *,
struct cifs_sb_info *);
/* query symlink target */
- int (*query_symlink)(const unsigned int, struct cifs_tcon *,
- struct cifs_sb_info *, const char *,
- char **, bool);
+ int (*query_symlink)(const unsigned int xid,
+ struct cifs_tcon *tcon,
+ struct cifs_sb_info *cifs_sb,
+ const char *full_path,
+ char **target_path,
+ struct kvec *rsp_iov);
/* open a file for non-posix mounts */
int (*open)(const unsigned int xid, struct cifs_open_parms *oparms, __u32 *oplock,
void *buf);
diff --git a/fs/smb/client/inode.c b/fs/smb/client/inode.c
index 51e2916730cf..96a09818aa5b 100644
--- a/fs/smb/client/inode.c
+++ b/fs/smb/client/inode.c
@@ -428,7 +428,7 @@ int cifs_get_inode_info_unix(struct inode **pinode,
if (!server->ops->query_symlink)
return -EOPNOTSUPP;
rc = server->ops->query_symlink(xid, tcon, cifs_sb, full_path,
- &fattr.cf_symlink_target, false);
+ &fattr.cf_symlink_target, NULL);
if (rc) {
cifs_dbg(FYI, "%s: query_symlink: %d\n", __func__, rc);
goto cgiiu_exit;
@@ -988,17 +988,21 @@ static int query_reparse(struct cifs_open_info_data *data,
{
struct TCP_Server_Info *server = tcon->ses->server;
struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
- bool reparse_point = data->reparse_point;
+ struct kvec rsp_iov, *iov = NULL;
+ int rsp_buftype = CIFS_NO_BUFFER;
u32 tag = data->reparse_tag;
int rc = 0;
- if (!tag && server->ops->query_reparse_tag) {
- server->ops->query_reparse_tag(xid, tcon, cifs_sb,
- full_path, &tag);
+ if (!tag && server->ops->query_reparse_point) {
+ rc = server->ops->query_reparse_point(xid, tcon, cifs_sb,
+ full_path, &tag,
+ &rsp_iov, &rsp_buftype);
+ if (!rc)
+ iov = &rsp_iov;
}
switch ((data->reparse_tag = tag)) {
case 0: /* SMB1 symlink */
- reparse_point = false;
+ iov = NULL;
fallthrough;
case IO_REPARSE_TAG_NFS:
case IO_REPARSE_TAG_SYMLINK:
@@ -1006,10 +1010,11 @@ static int query_reparse(struct cifs_open_info_data *data,
rc = server->ops->query_symlink(xid, tcon,
cifs_sb, full_path,
&data->symlink_target,
- reparse_point);
+ iov);
}
break;
}
+ free_rsp_buf(rsp_buftype, rsp_iov.iov_base);
return rc;
}
diff --git a/fs/smb/client/smb1ops.c b/fs/smb/client/smb1ops.c
index 094ef4fe2219..9bf8735cdd1e 100644
--- a/fs/smb/client/smb1ops.c
+++ b/fs/smb/client/smb1ops.c
@@ -972,13 +972,16 @@ cifs_unix_dfs_readlink(const unsigned int xid, struct cifs_tcon *tcon,
#endif
}
-static int
-cifs_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
- struct cifs_sb_info *cifs_sb, const char *full_path,
- char **target_path, bool is_reparse_point)
+static int cifs_query_symlink(const unsigned int xid,
+ struct cifs_tcon *tcon,
+ struct cifs_sb_info *cifs_sb,
+ const char *full_path,
+ char **target_path,
+ struct kvec *rsp_iov)
{
int rc;
int oplock = 0;
+ bool is_reparse_point = !!rsp_iov;
struct cifs_fid fid;
struct cifs_open_parms oparms;
diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c
index 0f62bc373ad0..5eb2720f4aa7 100644
--- a/fs/smb/client/smb2ops.c
+++ b/fs/smb/client/smb2ops.c
@@ -2948,153 +2948,30 @@ parse_reparse_point(struct reparse_data_buffer *buf,
}
}
-static int
-smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
- struct cifs_sb_info *cifs_sb, const char *full_path,
- char **target_path, bool is_reparse_point)
+static int smb2_query_symlink(const unsigned int xid,
+ struct cifs_tcon *tcon,
+ struct cifs_sb_info *cifs_sb,
+ const char *full_path,
+ char **target_path,
+ struct kvec *rsp_iov)
{
- int rc;
- __le16 *utf16_path = NULL;
- __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
- struct cifs_open_parms oparms;
- struct cifs_fid fid;
- struct kvec err_iov = {NULL, 0};
- struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
- int flags = CIFS_CP_CREATE_CLOSE_OP;
- struct smb_rqst rqst[3];
- int resp_buftype[3];
- struct kvec rsp_iov[3];
- struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
- struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
- struct kvec close_iov[1];
- struct smb2_create_rsp *create_rsp;
- struct smb2_ioctl_rsp *ioctl_rsp;
- struct reparse_data_buffer *reparse_buf;
- int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
- u32 plen;
+ struct reparse_data_buffer *buf;
+ struct smb2_ioctl_rsp *io = rsp_iov->iov_base;
+ u32 plen = le32_to_cpu(io->OutputCount);
cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
- *target_path = NULL;
-
- if (smb3_encryption_required(tcon))
- flags |= CIFS_TRANSFORM_REQ;
-
- memset(rqst, 0, sizeof(rqst));
- resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
- memset(rsp_iov, 0, sizeof(rsp_iov));
-
- utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
- if (!utf16_path)
- return -ENOMEM;
-
- /* Open */
- memset(&open_iov, 0, sizeof(open_iov));
- rqst[0].rq_iov = open_iov;
- rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
-
- oparms = (struct cifs_open_parms) {
- .tcon = tcon,
- .path = full_path,
- .desired_access = FILE_READ_ATTRIBUTES,
- .disposition = FILE_OPEN,
- .create_options = cifs_create_options(cifs_sb, create_options),
- .fid = &fid,
- };
-
- rc = SMB2_open_init(tcon, server,
- &rqst[0], &oplock, &oparms, utf16_path);
- if (rc)
- goto querty_exit;
- smb2_set_next_command(tcon, &rqst[0]);
-
-
- /* IOCTL */
- memset(&io_iov, 0, sizeof(io_iov));
- rqst[1].rq_iov = io_iov;
- rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
-
- rc = SMB2_ioctl_init(tcon, server,
- &rqst[1], fid.persistent_fid,
- fid.volatile_fid, FSCTL_GET_REPARSE_POINT, NULL, 0,
- CIFSMaxBufSize -
- MAX_SMB2_CREATE_RESPONSE_SIZE -
- MAX_SMB2_CLOSE_RESPONSE_SIZE);
- if (rc)
- goto querty_exit;
-
- smb2_set_next_command(tcon, &rqst[1]);
- smb2_set_related(&rqst[1]);
-
-
- /* Close */
- memset(&close_iov, 0, sizeof(close_iov));
- rqst[2].rq_iov = close_iov;
- rqst[2].rq_nvec = 1;
-
- rc = SMB2_close_init(tcon, server,
- &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
- if (rc)
- goto querty_exit;
-
- smb2_set_related(&rqst[2]);
-
- rc = compound_send_recv(xid, tcon->ses, server,
- flags, 3, rqst,
- resp_buftype, rsp_iov);
-
- create_rsp = rsp_iov[0].iov_base;
- if (create_rsp && create_rsp->hdr.Status)
- err_iov = rsp_iov[0];
- ioctl_rsp = rsp_iov[1].iov_base;
-
- /*
- * Open was successful and we got an ioctl response.
- */
- if ((rc == 0) && (is_reparse_point)) {
- /* See MS-FSCC 2.3.23 */
-
- reparse_buf = (struct reparse_data_buffer *)
- ((char *)ioctl_rsp +
- le32_to_cpu(ioctl_rsp->OutputOffset));
- plen = le32_to_cpu(ioctl_rsp->OutputCount);
-
- if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
- rsp_iov[1].iov_len) {
- cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
- plen);
- rc = -EIO;
- goto querty_exit;
- }
-
- rc = parse_reparse_point(reparse_buf, plen, target_path,
- cifs_sb);
- goto querty_exit;
- }
-
- if (!rc || !err_iov.iov_base) {
- rc = -ENOENT;
- goto querty_exit;
- }
-
- rc = smb2_parse_symlink_response(cifs_sb, &err_iov, target_path);
-
- querty_exit:
- cifs_dbg(FYI, "query symlink rc %d\n", rc);
- kfree(utf16_path);
- SMB2_open_free(&rqst[0]);
- SMB2_ioctl_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);
- return rc;
+ buf = (struct reparse_data_buffer *)((u8 *)io +
+ le32_to_cpu(io->OutputOffset));
+ return parse_reparse_point(buf, plen, target_path, cifs_sb);
}
-int
-smb2_query_reparse_tag(const unsigned int xid, struct cifs_tcon *tcon,
- struct cifs_sb_info *cifs_sb, const char *full_path,
- __u32 *tag)
+static int smb2_query_reparse_point(const unsigned int xid,
+ struct cifs_tcon *tcon,
+ struct cifs_sb_info *cifs_sb,
+ const char *full_path,
+ u32 *tag, struct kvec *rsp,
+ int *rsp_buftype)
{
int rc;
__le16 *utf16_path = NULL;
@@ -3205,6 +3082,9 @@ smb2_query_reparse_tag(const unsigned int xid, struct cifs_tcon *tcon,
goto query_rp_exit;
}
*tag = le32_to_cpu(reparse_buf->ReparseTag);
+ *rsp = rsp_iov[1];
+ *rsp_buftype = resp_buftype[1];
+ resp_buftype[1] = CIFS_NO_BUFFER;
}
query_rp_exit:
@@ -5503,7 +5383,7 @@ struct smb_version_operations smb30_operations = {
.echo = SMB2_echo,
.query_path_info = smb2_query_path_info,
/* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
- .query_reparse_tag = smb2_query_reparse_tag,
+ .query_reparse_point = smb2_query_reparse_point,
.get_srv_inum = smb2_get_srv_inum,
.query_file_info = smb2_query_file_info,
.set_path_size = smb2_set_path_size,
@@ -5616,7 +5496,7 @@ struct smb_version_operations smb311_operations = {
.can_echo = smb2_can_echo,
.echo = SMB2_echo,
.query_path_info = smb2_query_path_info,
- .query_reparse_tag = smb2_query_reparse_tag,
+ .query_reparse_point = smb2_query_reparse_point,
.get_srv_inum = smb2_get_srv_inum,
.query_file_info = smb2_query_file_info,
.set_path_size = smb2_set_path_size,
--
2.41.0
