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CIFS: Fix cifs_writev_requeue when wsize changes

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If wsize changes on reconnect we need to use new writedata structure
that for retrying.

Reviewed-by: Shirish Pargaonkar <spargaonkar@suse.com>
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
This commit is contained in:
Pavel Shilovsky 2014-06-22 11:03:22 +04:00 committed by Steve French
parent 66231a4796
commit 7f6c50086a
4 changed files with 87 additions and 16 deletions
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2
fs/cifs/cifsglob.h
View File

@ -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 {

84
fs/cifs/cifssmb.c
View File

@ -1896,28 +1896,80 @@ 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;
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]);
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;
}
}
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);

7
fs/cifs/smb1ops.c
View File

@ -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,

10
fs/cifs/smb2ops.c
View File

@ -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 = {