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path: root/fs/cifs/smb2ops.c
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Diffstat (limited to 'fs/cifs/smb2ops.c')
-rw-r--r--fs/cifs/smb2ops.c141
1 files changed, 80 insertions, 61 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index cd55af9b7cc5..a7f328f79c6f 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -10,6 +10,7 @@
#include <linux/falloc.h>
#include <linux/scatterlist.h>
#include <linux/uuid.h>
+#include <linux/sort.h>
#include <crypto/aead.h>
#include "cifsglob.h"
#include "smb2pdu.h"
@@ -151,13 +152,7 @@ smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
static unsigned int
smb2_get_credits(struct mid_q_entry *mid)
{
- struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf;
-
- if (mid->mid_state == MID_RESPONSE_RECEIVED
- || mid->mid_state == MID_RESPONSE_MALFORMED)
- return le16_to_cpu(shdr->CreditRequest);
-
- return 0;
+ return mid->credits_received;
}
static int
@@ -315,7 +310,7 @@ smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
{
int rc;
- ses->server->CurrentMid = 0;
+ cifs_ses_server(ses)->CurrentMid = 0;
rc = SMB2_negotiate(xid, ses);
/* BB we probably don't need to retry with modern servers */
if (rc == -EAGAIN)
@@ -558,6 +553,13 @@ out:
return rc;
}
+static int compare_iface(const void *ia, const void *ib)
+{
+ const struct cifs_server_iface *a = (struct cifs_server_iface *)ia;
+ const struct cifs_server_iface *b = (struct cifs_server_iface *)ib;
+
+ return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1);
+}
static int
SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
@@ -587,6 +589,9 @@ SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
if (rc)
goto out;
+ /* sort interfaces from fastest to slowest */
+ sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL);
+
spin_lock(&ses->iface_lock);
kfree(ses->iface_list);
ses->iface_list = iface_list;
@@ -1402,15 +1407,10 @@ smb2_ioctl_query_info(const unsigned int xid,
if (smb3_encryption_required(tcon))
flags |= CIFS_TRANSFORM_REQ;
- buffer = kmalloc(qi.output_buffer_length, GFP_KERNEL);
- if (buffer == NULL)
- return -ENOMEM;
-
- if (copy_from_user(buffer, arg + sizeof(struct smb_query_info),
- qi.output_buffer_length)) {
- rc = -EFAULT;
- goto iqinf_exit;
- }
+ buffer = memdup_user(arg + sizeof(struct smb_query_info),
+ qi.output_buffer_length);
+ if (IS_ERR(buffer))
+ return PTR_ERR(buffer);
/* Open */
memset(&open_iov, 0, sizeof(open_iov));
@@ -1529,35 +1529,32 @@ smb2_ioctl_query_info(const unsigned int xid,
if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
if (qi.input_buffer_length > 0 &&
- le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length > rsp_iov[1].iov_len) {
- rc = -EFAULT;
- goto iqinf_exit;
- }
- if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
- sizeof(qi.input_buffer_length))) {
- rc = -EFAULT;
- goto iqinf_exit;
- }
+ le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
+ > rsp_iov[1].iov_len)
+ goto e_fault;
+
+ if (copy_to_user(&pqi->input_buffer_length,
+ &qi.input_buffer_length,
+ sizeof(qi.input_buffer_length)))
+ goto e_fault;
+
if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
(const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
- qi.input_buffer_length)) {
- rc = -EFAULT;
- goto iqinf_exit;
- }
+ qi.input_buffer_length))
+ goto e_fault;
} else {
pqi = (struct smb_query_info __user *)arg;
qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
- if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
- sizeof(qi.input_buffer_length))) {
- rc = -EFAULT;
- goto iqinf_exit;
- }
- if (copy_to_user(pqi + 1, qi_rsp->Buffer, qi.input_buffer_length)) {
- rc = -EFAULT;
- goto iqinf_exit;
- }
+ if (copy_to_user(&pqi->input_buffer_length,
+ &qi.input_buffer_length,
+ sizeof(qi.input_buffer_length)))
+ goto e_fault;
+
+ if (copy_to_user(pqi + 1, qi_rsp->Buffer,
+ qi.input_buffer_length))
+ goto e_fault;
}
iqinf_exit:
@@ -1573,6 +1570,10 @@ smb2_ioctl_query_info(const unsigned int xid,
free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
return rc;
+
+e_fault:
+ rc = -EFAULT;
+ goto iqinf_exit;
}
static ssize_t
@@ -3281,22 +3282,38 @@ static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
static void
smb2_downgrade_oplock(struct TCP_Server_Info *server,
- struct cifsInodeInfo *cinode, bool set_level2)
+ struct cifsInodeInfo *cinode, __u32 oplock,
+ unsigned int epoch, bool *purge_cache)
{
- if (set_level2)
- server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
- 0, NULL);
- else
- server->ops->set_oplock_level(cinode, 0, 0, NULL);
+ server->ops->set_oplock_level(cinode, oplock, 0, NULL);
}
static void
-smb21_downgrade_oplock(struct TCP_Server_Info *server,
- struct cifsInodeInfo *cinode, bool set_level2)
+smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
+ unsigned int epoch, bool *purge_cache);
+
+static void
+smb3_downgrade_oplock(struct TCP_Server_Info *server,
+ struct cifsInodeInfo *cinode, __u32 oplock,
+ unsigned int epoch, bool *purge_cache)
{
- server->ops->set_oplock_level(cinode,
- set_level2 ? SMB2_LEASE_READ_CACHING_HE :
- 0, 0, NULL);
+ unsigned int old_state = cinode->oplock;
+ unsigned int old_epoch = cinode->epoch;
+ unsigned int new_state;
+
+ if (epoch > old_epoch) {
+ smb21_set_oplock_level(cinode, oplock, 0, NULL);
+ cinode->epoch = epoch;
+ }
+
+ new_state = cinode->oplock;
+ *purge_cache = false;
+
+ if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
+ (new_state & CIFS_CACHE_READ_FLG) == 0)
+ *purge_cache = true;
+ else if (old_state == new_state && (epoch - old_epoch > 1))
+ *purge_cache = true;
}
static void
@@ -3598,14 +3615,16 @@ smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
u8 *ses_enc_key;
spin_lock(&cifs_tcp_ses_lock);
- list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
- if (ses->Suid != ses_id)
- continue;
- ses_enc_key = enc ? ses->smb3encryptionkey :
- ses->smb3decryptionkey;
- memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
- spin_unlock(&cifs_tcp_ses_lock);
- return 0;
+ list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
+ list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+ if (ses->Suid == ses_id) {
+ ses_enc_key = enc ? ses->smb3encryptionkey :
+ ses->smb3decryptionkey;
+ memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
+ spin_unlock(&cifs_tcp_ses_lock);
+ return 0;
+ }
+ }
}
spin_unlock(&cifs_tcp_ses_lock);
@@ -4556,7 +4575,7 @@ struct smb_version_operations smb21_operations = {
.print_stats = smb2_print_stats,
.is_oplock_break = smb2_is_valid_oplock_break,
.handle_cancelled_mid = smb2_handle_cancelled_mid,
- .downgrade_oplock = smb21_downgrade_oplock,
+ .downgrade_oplock = smb2_downgrade_oplock,
.need_neg = smb2_need_neg,
.negotiate = smb2_negotiate,
.negotiate_wsize = smb2_negotiate_wsize,
@@ -4656,7 +4675,7 @@ struct smb_version_operations smb30_operations = {
.dump_share_caps = smb2_dump_share_caps,
.is_oplock_break = smb2_is_valid_oplock_break,
.handle_cancelled_mid = smb2_handle_cancelled_mid,
- .downgrade_oplock = smb21_downgrade_oplock,
+ .downgrade_oplock = smb3_downgrade_oplock,
.need_neg = smb2_need_neg,
.negotiate = smb2_negotiate,
.negotiate_wsize = smb3_negotiate_wsize,
@@ -4764,7 +4783,7 @@ struct smb_version_operations smb311_operations = {
.dump_share_caps = smb2_dump_share_caps,
.is_oplock_break = smb2_is_valid_oplock_break,
.handle_cancelled_mid = smb2_handle_cancelled_mid,
- .downgrade_oplock = smb21_downgrade_oplock,
+ .downgrade_oplock = smb3_downgrade_oplock,
.need_neg = smb2_need_neg,
.negotiate = smb2_negotiate,
.negotiate_wsize = smb3_negotiate_wsize,
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-24 05:43:59 +0300