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Diffstat (limited to 'fs/cifs/cifssmb.c')
-rw-r--r--fs/cifs/cifssmb.c65
1 files changed, 43 insertions, 22 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index b1f49c1c543a..bb54ccf8481c 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -128,24 +128,31 @@ static int __cifs_reconnect_tcon(const struct nls_table *nlsc,
int rc;
struct dfs_cache_tgt_list tl;
struct dfs_cache_tgt_iterator *it = NULL;
- char tree[MAX_TREE_SIZE + 1];
+ char *tree;
const char *tcp_host;
size_t tcp_host_len;
const char *dfs_host;
size_t dfs_host_len;
+ tree = kzalloc(MAX_TREE_SIZE, GFP_KERNEL);
+ if (!tree)
+ return -ENOMEM;
+
if (tcon->ipc) {
- snprintf(tree, sizeof(tree), "\\\\%s\\IPC$",
+ snprintf(tree, MAX_TREE_SIZE, "\\\\%s\\IPC$",
tcon->ses->server->hostname);
- return CIFSTCon(0, tcon->ses, tree, tcon, nlsc);
+ rc = CIFSTCon(0, tcon->ses, tree, tcon, nlsc);
+ goto out;
}
- if (!tcon->dfs_path)
- return CIFSTCon(0, tcon->ses, tcon->treeName, tcon, nlsc);
+ if (!tcon->dfs_path) {
+ rc = CIFSTCon(0, tcon->ses, tcon->treeName, tcon, nlsc);
+ goto out;
+ }
rc = dfs_cache_noreq_find(tcon->dfs_path + 1, NULL, &tl);
if (rc)
- return rc;
+ goto out;
extract_unc_hostname(tcon->ses->server->hostname, &tcp_host,
&tcp_host_len);
@@ -165,7 +172,7 @@ static int __cifs_reconnect_tcon(const struct nls_table *nlsc,
continue;
}
- snprintf(tree, sizeof(tree), "\\%s", tgt);
+ snprintf(tree, MAX_TREE_SIZE, "\\%s", tgt);
rc = CIFSTCon(0, tcon->ses, tree, tcon, nlsc);
if (!rc)
@@ -182,6 +189,8 @@ static int __cifs_reconnect_tcon(const struct nls_table *nlsc,
rc = -ENOENT;
}
dfs_cache_free_tgts(&tl);
+out:
+ kfree(tree);
return rc;
}
#else
@@ -1540,18 +1549,26 @@ cifs_discard_remaining_data(struct TCP_Server_Info *server)
}
static int
-cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid)
+__cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid,
+ bool malformed)
{
int length;
- struct cifs_readdata *rdata = mid->callback_data;
length = cifs_discard_remaining_data(server);
- dequeue_mid(mid, rdata->result);
+ dequeue_mid(mid, malformed);
mid->resp_buf = server->smallbuf;
server->smallbuf = NULL;
return length;
}
+static int
+cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid)
+{
+ struct cifs_readdata *rdata = mid->callback_data;
+
+ return __cifs_readv_discard(server, mid, rdata->result);
+}
+
int
cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid)
{
@@ -1593,12 +1610,23 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid)
return -1;
}
+ /* set up first two iov for signature check and to get credits */
+ rdata->iov[0].iov_base = buf;
+ rdata->iov[0].iov_len = 4;
+ rdata->iov[1].iov_base = buf + 4;
+ rdata->iov[1].iov_len = server->total_read - 4;
+ cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
+ rdata->iov[0].iov_base, rdata->iov[0].iov_len);
+ cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
+ rdata->iov[1].iov_base, rdata->iov[1].iov_len);
+
/* Was the SMB read successful? */
rdata->result = server->ops->map_error(buf, false);
if (rdata->result != 0) {
cifs_dbg(FYI, "%s: server returned error %d\n",
__func__, rdata->result);
- return cifs_readv_discard(server, mid);
+ /* normal error on read response */
+ return __cifs_readv_discard(server, mid, false);
}
/* Is there enough to get to the rest of the READ_RSP header? */
@@ -1642,14 +1670,6 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid)
server->total_read += length;
}
- /* set up first iov for signature check */
- rdata->iov[0].iov_base = buf;
- rdata->iov[0].iov_len = 4;
- rdata->iov[1].iov_base = buf + 4;
- rdata->iov[1].iov_len = server->total_read - 4;
- cifs_dbg(FYI, "0: iov_base=%p iov_len=%u\n",
- rdata->iov[0].iov_base, server->total_read);
-
/* how much data is in the response? */
#ifdef CONFIG_CIFS_SMB_DIRECT
use_rdma_mr = rdata->mr;
@@ -2114,7 +2134,7 @@ cifs_writev_requeue(struct cifs_writedata *wdata)
for (j = 0; j < nr_pages; j++) {
unlock_page(wdata2->pages[j]);
- if (rc != 0 && rc != -EAGAIN) {
+ if (rc != 0 && !is_retryable_error(rc)) {
SetPageError(wdata2->pages[j]);
end_page_writeback(wdata2->pages[j]);
put_page(wdata2->pages[j]);
@@ -2123,7 +2143,7 @@ cifs_writev_requeue(struct cifs_writedata *wdata)
if (rc) {
kref_put(&wdata2->refcount, cifs_writedata_release);
- if (rc == -EAGAIN)
+ if (is_retryable_error(rc))
continue;
break;
}
@@ -2132,7 +2152,8 @@ cifs_writev_requeue(struct cifs_writedata *wdata)
i += nr_pages;
} while (i < wdata->nr_pages);
- mapping_set_error(inode->i_mapping, rc);
+ if (rc != 0 && !is_retryable_error(rc))
+ mapping_set_error(inode->i_mapping, rc);
kref_put(&wdata->refcount, cifs_writedata_release);
}