summaryrefslogtreecommitdiffstats
path: root/fs/cifs/smb2ops.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/cifs/smb2ops.c')
-rw-r--r--fs/cifs/smb2ops.c73
1 files changed, 68 insertions, 5 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 787844b..77f8aeb 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -19,6 +19,7 @@
#include <linux/pagemap.h>
#include <linux/vfs.h>
+#include <linux/falloc.h>
#include "cifsglob.h"
#include "smb2pdu.h"
#include "smb2proto.h"
@@ -112,6 +113,53 @@ smb2_get_credits(struct mid_q_entry *mid)
return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
}
+static int
+smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
+ unsigned int *num, unsigned int *credits)
+{
+ int rc = 0;
+ unsigned int scredits;
+
+ spin_lock(&server->req_lock);
+ while (1) {
+ if (server->credits <= 0) {
+ spin_unlock(&server->req_lock);
+ cifs_num_waiters_inc(server);
+ rc = wait_event_killable(server->request_q,
+ has_credits(server, &server->credits));
+ cifs_num_waiters_dec(server);
+ if (rc)
+ return rc;
+ spin_lock(&server->req_lock);
+ } else {
+ if (server->tcpStatus == CifsExiting) {
+ spin_unlock(&server->req_lock);
+ return -ENOENT;
+ }
+
+ scredits = server->credits;
+ /* can deadlock with reopen */
+ if (scredits == 1) {
+ *num = SMB2_MAX_BUFFER_SIZE;
+ *credits = 0;
+ break;
+ }
+
+ /* leave one credit for a possible reopen */
+ scredits--;
+ *num = min_t(unsigned int, size,
+ scredits * SMB2_MAX_BUFFER_SIZE);
+
+ *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
+ server->credits -= *credits;
+ server->in_flight++;
+ break;
+ }
+ }
+ spin_unlock(&server->req_lock);
+ return rc;
+}
+
static __u64
smb2_get_next_mid(struct TCP_Server_Info *server)
{
@@ -182,8 +230,9 @@ smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
/* start with specified wsize, or default */
wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
wsize = min_t(unsigned int, wsize, server->max_write);
- /* set it to the maximum buffer size value we can send with 1 credit */
- wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
+
+ if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
+ wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
return wsize;
}
@@ -197,8 +246,9 @@ smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
/* start with specified rsize, or default */
rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
rsize = min_t(unsigned int, rsize, server->max_read);
- /* set it to the maximum buffer size value we can send with 1 credit */
- rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
+
+ if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
+ rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
return rsize;
}
@@ -687,7 +737,7 @@ smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
{
__le64 eof = cpu_to_le64(size);
return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
- cfile->fid.volatile_fid, cfile->pid, &eof);
+ cfile->fid.volatile_fid, cfile->pid, &eof, false);
}
static int
@@ -1104,6 +1154,13 @@ smb3_parse_lease_buf(void *buf, unsigned int *epoch)
return le32_to_cpu(lc->lcontext.LeaseState);
}
+static unsigned int
+smb2_wp_retry_size(struct inode *inode)
+{
+ return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
+ SMB2_MAX_BUFFER_SIZE);
+}
+
struct smb_version_operations smb20_operations = {
.compare_fids = smb2_compare_fids,
.setup_request = smb2_setup_request,
@@ -1113,6 +1170,7 @@ struct smb_version_operations smb20_operations = {
.set_credits = smb2_set_credits,
.get_credits_field = smb2_get_credits_field,
.get_credits = smb2_get_credits,
+ .wait_mtu_credits = cifs_wait_mtu_credits,
.get_next_mid = smb2_get_next_mid,
.read_data_offset = smb2_read_data_offset,
.read_data_length = smb2_read_data_length,
@@ -1177,6 +1235,7 @@ struct smb_version_operations smb20_operations = {
.create_lease_buf = smb2_create_lease_buf,
.parse_lease_buf = smb2_parse_lease_buf,
.clone_range = smb2_clone_range,
+ .wp_retry_size = smb2_wp_retry_size,
};
struct smb_version_operations smb21_operations = {
@@ -1188,6 +1247,7 @@ struct smb_version_operations smb21_operations = {
.set_credits = smb2_set_credits,
.get_credits_field = smb2_get_credits_field,
.get_credits = smb2_get_credits,
+ .wait_mtu_credits = smb2_wait_mtu_credits,
.get_next_mid = smb2_get_next_mid,
.read_data_offset = smb2_read_data_offset,
.read_data_length = smb2_read_data_length,
@@ -1252,6 +1312,7 @@ struct smb_version_operations smb21_operations = {
.create_lease_buf = smb2_create_lease_buf,
.parse_lease_buf = smb2_parse_lease_buf,
.clone_range = smb2_clone_range,
+ .wp_retry_size = smb2_wp_retry_size,
};
struct smb_version_operations smb30_operations = {
@@ -1263,6 +1324,7 @@ struct smb_version_operations smb30_operations = {
.set_credits = smb2_set_credits,
.get_credits_field = smb2_get_credits_field,
.get_credits = smb2_get_credits,
+ .wait_mtu_credits = smb2_wait_mtu_credits,
.get_next_mid = smb2_get_next_mid,
.read_data_offset = smb2_read_data_offset,
.read_data_length = smb2_read_data_length,
@@ -1330,6 +1392,7 @@ struct smb_version_operations smb30_operations = {
.parse_lease_buf = smb3_parse_lease_buf,
.clone_range = smb2_clone_range,
.validate_negotiate = smb3_validate_negotiate,
+ .wp_retry_size = smb2_wp_retry_size,
};
struct smb_version_values smb20_values = {
OpenPOWER on IntegriCloud