If wsize changes on reconnect we need to use new writedata structure
that for retrying.
Signed-off-by: Pavel Shilovsky <pshilovsky@xxxxxxxxx>
---
fs/cifs/cifsglob.h | 2 ++
fs/cifs/cifssmb.c | 84 +++++++++++++++++++++++++++++++++++++++++++-----------
fs/cifs/smb1ops.c | 7 +++++
fs/cifs/smb2ops.c | 10 +++++++
4 files changed, 87 insertions(+), 16 deletions(-)
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index de6aed8..8c53f20 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -404,6 +404,8 @@ struct smb_version_operations {
const struct cifs_fid *, u32 *);
int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
int);
+ /* writepages retry size */
+ unsigned int (*wp_retry_size)(struct inode *);
};
struct smb_version_values {
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 6ce4e09..e273ded 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -1899,28 +1899,80 @@ cifs_writedata_release(struct kref *refcount)
static void
cifs_writev_requeue(struct cifs_writedata *wdata)
{
- int i, rc;
+ int i, rc = 0;
struct inode *inode = wdata->cfile->dentry->d_inode;
struct TCP_Server_Info *server;
+ unsigned int rest_len;
- for (i = 0; i < wdata->nr_pages; i++) {
- lock_page(wdata->pages[i]);
- clear_page_dirty_for_io(wdata->pages[i]);
- }
-
+ server = tlink_tcon(wdata->cfile->tlink)->ses->server;
+ i = 0;
+ rest_len = wdata->bytes;
do {
- server = tlink_tcon(wdata->cfile->tlink)->ses->server;
- rc = server->ops->async_writev(wdata, cifs_writedata_release);
- } while (rc == -EAGAIN);
+ struct cifs_writedata *wdata2;
+ unsigned int j, nr_pages, wsize, tailsz, cur_len;
+
+ wsize = server->ops->wp_retry_size(inode);
+ if (wsize < rest_len) {
+ nr_pages = wsize / PAGE_CACHE_SIZE;
+ if (!nr_pages) {
+ rc = -ENOTSUPP;
+ break;
+ }
+ cur_len = nr_pages * PAGE_CACHE_SIZE;
+ tailsz = PAGE_CACHE_SIZE;
+ } else {
+ nr_pages = DIV_ROUND_UP(rest_len, PAGE_CACHE_SIZE);
+ cur_len = rest_len;
+ tailsz = rest_len - (nr_pages - 1) * PAGE_CACHE_SIZE;
+ }
- for (i = 0; i < wdata->nr_pages; i++) {
- unlock_page(wdata->pages[i]);
- if (rc != 0) {
- SetPageError(wdata->pages[i]);
- end_page_writeback(wdata->pages[i]);
- page_cache_release(wdata->pages[i]);
+ wdata2 = cifs_writedata_alloc(nr_pages, cifs_writev_complete);
+ if (!wdata2) {
+ rc = -ENOMEM;
+ break;
}
- }
+
+ for (j = 0; j < nr_pages; j++) {
+ wdata2->pages[j] = wdata->pages[i + j];
+ lock_page(wdata2->pages[j]);
+ clear_page_dirty_for_io(wdata2->pages[j]);
+ }
+
+ wdata2->sync_mode = wdata->sync_mode;
+ wdata2->nr_pages = nr_pages;
+ wdata2->offset = page_offset(wdata2->pages[0]);
+ wdata2->pagesz = PAGE_CACHE_SIZE;
+ wdata2->tailsz = tailsz;
+ wdata2->bytes = cur_len;
+
+ wdata2->cfile = find_writable_file(CIFS_I(inode), false);
+ if (!wdata2->cfile) {
+ cifs_dbg(VFS, "No writable handles for inode\n");
+ rc = -EBADF;
+ break;
+ }
+ wdata2->pid = wdata2->cfile->pid;
+ rc = server->ops->async_writev(wdata2, cifs_writedata_release);
+
+ for (j = 0; j < nr_pages; j++) {
+ unlock_page(wdata2->pages[j]);
+ if (rc != 0 && rc != -EAGAIN) {
+ SetPageError(wdata2->pages[j]);
+ end_page_writeback(wdata2->pages[j]);
+ page_cache_release(wdata2->pages[j]);
+ }
+ }
+
+ if (rc) {
+ kref_put(&wdata2->refcount, cifs_writedata_release);
+ if (rc == -EAGAIN)
+ continue;
+ break;
+ }
+
+ rest_len -= cur_len;
+ i += nr_pages;
+ } while (i < wdata->nr_pages);
mapping_set_error(inode->i_mapping, rc);
kref_put(&wdata->refcount, cifs_writedata_release);
diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c
index d1fdfa8..8a96342 100644
--- a/fs/cifs/smb1ops.c
+++ b/fs/cifs/smb1ops.c
@@ -1009,6 +1009,12 @@ cifs_is_read_op(__u32 oplock)
return oplock == OPLOCK_READ;
}
+static unsigned int
+cifs_wp_retry_size(struct inode *inode)
+{
+ return CIFS_SB(inode->i_sb)->wsize;
+}
+
struct smb_version_operations smb1_operations = {
.send_cancel = send_nt_cancel,
.compare_fids = cifs_compare_fids,
@@ -1078,6 +1084,7 @@ struct smb_version_operations smb1_operations = {
.query_mf_symlink = cifs_query_mf_symlink,
.create_mf_symlink = cifs_create_mf_symlink,
.is_read_op = cifs_is_read_op,
+ .wp_retry_size = cifs_wp_retry_size,
#ifdef CONFIG_CIFS_XATTR
.query_all_EAs = CIFSSMBQAllEAs,
.set_EA = CIFSSMBSetEA,
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 787844b..e35ce5b 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1104,6 +1104,13 @@ 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,
@@ -1177,6 +1184,7 @@ 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 = {
@@ -1252,6 +1260,7 @@ 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 = {
@@ -1330,6 +1339,7 @@ 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 = {
--
1.8.1.2
--
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