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smb: client: insert compression check/call on write requests

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On smb2_async_writev(), set CIFS_COMPRESS_REQ on request flags if
should_compress() returns true.

On smb_send_rqst() check the flags, and compress and send the request to
the server.

(*) If the compression fails with -EMSGSIZE (i.e. compressed size is >=
uncompressed size), the original uncompressed request is sent instead.

Signed-off-by: Enzo Matsumiya <ematsumiya@suse.de>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Enzo Matsumiya 2024-09-11 16:10:24 -05:00 committed by Steve French
parent d14bbfff25
commit f046d71e84
2 changed files with 9 additions and 0 deletions
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5
fs/smb/client/smb2pdu.c
View File

@ -42,6 +42,7 @@
#include "dfs_cache.h"
#endif
#include "cached_dir.h"
#include "compress.h"
/*
* The following table defines the expected "StructureSize" of SMB2 requests
@ -5020,6 +5021,10 @@ smb2_async_writev(struct cifs_io_subrequest *wdata)
flags |= CIFS_HAS_CREDITS;
}
/* XXX: compression + encryption is unsupported for now */
if (((flags & CIFS_TRANSFORM_REQ) != CIFS_TRANSFORM_REQ) && should_compress(tcon, &rqst))
flags |= CIFS_COMPRESS_REQ;
rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
wdata, flags, &wdata->credits);
/* Can't touch wdata if rc == 0 */

4
fs/smb/client/transport.c
View File

@ -28,6 +28,7 @@
#include "cifs_debug.h"
#include "smb2proto.h"
#include "smbdirect.h"
#include "compress.h"
/* Max number of iovectors we can use off the stack when sending requests. */
#define CIFS_MAX_IOV_SIZE 8
@ -432,6 +433,9 @@ smb_send_rqst(struct TCP_Server_Info *server, int num_rqst,
struct kvec *iov;
int rc;
if (flags & CIFS_COMPRESS_REQ)
return smb_compress(server, &rqst[0], __smb_send_rqst);
if (!(flags & CIFS_TRANSFORM_REQ))
return __smb_send_rqst(server, num_rqst, rqst);