mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-22 08:49:45 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
Highlights include: - Changes to the RPC socket code to allow NFSv4 to turn off timeout+retry - Detect TCP connection breakage through the "keepalive" mechanism - Add client side support for NFSv4.x migration (Chuck Lever) - Add support for multiple security flavour arguments to the "sec=" mount option (Dros Adamson) - fs-cache bugfixes from David Howells: - Fix an issue whereby caching can be enabled on a file that is open for writing - More NFSv4 open code stable bugfixes - Various Labeled NFS (selinux) bugfixes, including one stable fix - Fix buffer overflow checking in the RPCSEC_GSS upcall encoding -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.15 (GNU/Linux) iQIcBAABAgAGBQJSe8TEAAoJEGcL54qWCgDydu0QAJVtVhfwlUKm/HZ4oAy0Q5T8 rJOWupqGnwyqTNLIRTlNegFSwMY+bABbkihXzSoj641o5zRb200KePlNxknzzlu1 Q715035LDeEC1jrrHHeztTa9uWxAZ9B6gstMzilJYbV72VRYuWA6Q5LstXwQy/jN ViSldrGJ4sRZUe6wpNLPBRDBfOMWOtZdyRqqqjm71ZHJJnaqQWLBvThTG4MsLlpg j/khi5189MxJWePTKI9zGZdnXZAZ0ar1tAi1QWDNv044EwsS3LZZIko+YdBh6LZx 9IBwk6TqOXFY0jxPDsIZtTfWPf4pjewRrPINMkjlZl3TJEf97sIlavZ7gWqvVIz5 eXzFGy7D2XBgub8TGcmZM/7keHY/sqghz7lXZ8FulXlVem52r/95NiQ9tu8l8hq3 Ab0FUnjtXeuaDFPBCHlKb3zmCMGFF89VqtpCj2plCPvfcGgJvXJqddWBRisQw9St UgD1PQWRFGtkrHv5EcQkd5boVdRNjAVAC9PaCWNpOpSVDjJyuUE+v/k75+ZwDcG8 afAFMJSbCwRxW+cFlLAsQTfQztzuWTTOOVQvJDxfyYulcWshyIruhiYItRDfJqRp RynuVzrBERzUs5wsefnBbC218C/WSlOrodPbsZvdhKolvRx1RNtWT29ilZ6+p2tH 4378ZRLtQvm9RXBnAkRc =gflJ -----END PGP SIGNATURE----- Merge tag 'nfs-for-3.13-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs Pull NFS client updates from Trond Myklebust: "Highlights include: - Changes to the RPC socket code to allow NFSv4 to turn off timeout+retry: * Detect TCP connection breakage through the "keepalive" mechanism - Add client side support for NFSv4.x migration (Chuck Lever) - Add support for multiple security flavour arguments to the "sec=" mount option (Dros Adamson) - fs-cache bugfixes from David Howells: * Fix an issue whereby caching can be enabled on a file that is open for writing - More NFSv4 open code stable bugfixes - Various Labeled NFS (selinux) bugfixes, including one stable fix - Fix buffer overflow checking in the RPCSEC_GSS upcall encoding" * tag 'nfs-for-3.13-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (68 commits) NFSv4.2: Remove redundant checks in nfs_setsecurity+nfs4_label_init_security NFSv4: Sanity check the server reply in _nfs4_server_capabilities NFSv4.2: encode_readdir - only ask for labels when doing readdirplus nfs: set security label when revalidating inode NFSv4.2: Fix a mismatch between Linux labeled NFS and the NFSv4.2 spec NFS: Fix a missing initialisation when reading the SELinux label nfs: fix oops when trying to set SELinux label nfs: fix inverted test for delegation in nfs4_reclaim_open_state SUNRPC: Cleanup xs_destroy() SUNRPC: close a rare race in xs_tcp_setup_socket. SUNRPC: remove duplicated include from clnt.c nfs: use IS_ROOT not DCACHE_DISCONNECTED SUNRPC: Fix buffer overflow checking in gss_encode_v0_msg/gss_encode_v1_msg SUNRPC: gss_alloc_msg - choose _either_ a v0 message or a v1 message SUNRPC: remove an unnecessary if statement nfs: Use PTR_ERR_OR_ZERO in 'nfs/nfs4super.c' nfs: Use PTR_ERR_OR_ZERO in 'nfs41_callback_up' function nfs: Remove useless 'error' assignment sunrpc: comment typo fix SUNRPC: Add correct rcu_dereference annotation in rpc_clnt_set_transport ...
242 lines
6.8 KiB
C
242 lines
6.8 KiB
C
/*
|
|
* fs/cifs/fscache.c - CIFS filesystem cache interface
|
|
*
|
|
* Copyright (c) 2010 Novell, Inc.
|
|
* Author(s): Suresh Jayaraman <sjayaraman@suse.de>
|
|
*
|
|
* This library is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published
|
|
* by the Free Software Foundation; either version 2.1 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
|
|
* the GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#include "fscache.h"
|
|
#include "cifsglob.h"
|
|
#include "cifs_debug.h"
|
|
#include "cifs_fs_sb.h"
|
|
|
|
void cifs_fscache_get_client_cookie(struct TCP_Server_Info *server)
|
|
{
|
|
server->fscache =
|
|
fscache_acquire_cookie(cifs_fscache_netfs.primary_index,
|
|
&cifs_fscache_server_index_def, server, true);
|
|
cifs_dbg(FYI, "%s: (0x%p/0x%p)\n",
|
|
__func__, server, server->fscache);
|
|
}
|
|
|
|
void cifs_fscache_release_client_cookie(struct TCP_Server_Info *server)
|
|
{
|
|
cifs_dbg(FYI, "%s: (0x%p/0x%p)\n",
|
|
__func__, server, server->fscache);
|
|
fscache_relinquish_cookie(server->fscache, 0);
|
|
server->fscache = NULL;
|
|
}
|
|
|
|
void cifs_fscache_get_super_cookie(struct cifs_tcon *tcon)
|
|
{
|
|
struct TCP_Server_Info *server = tcon->ses->server;
|
|
|
|
tcon->fscache =
|
|
fscache_acquire_cookie(server->fscache,
|
|
&cifs_fscache_super_index_def, tcon, true);
|
|
cifs_dbg(FYI, "%s: (0x%p/0x%p)\n",
|
|
__func__, server->fscache, tcon->fscache);
|
|
}
|
|
|
|
void cifs_fscache_release_super_cookie(struct cifs_tcon *tcon)
|
|
{
|
|
cifs_dbg(FYI, "%s: (0x%p)\n", __func__, tcon->fscache);
|
|
fscache_relinquish_cookie(tcon->fscache, 0);
|
|
tcon->fscache = NULL;
|
|
}
|
|
|
|
static void cifs_fscache_enable_inode_cookie(struct inode *inode)
|
|
{
|
|
struct cifsInodeInfo *cifsi = CIFS_I(inode);
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
|
|
struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
|
|
|
|
if (cifsi->fscache)
|
|
return;
|
|
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) {
|
|
cifsi->fscache = fscache_acquire_cookie(tcon->fscache,
|
|
&cifs_fscache_inode_object_def, cifsi, true);
|
|
cifs_dbg(FYI, "%s: got FH cookie (0x%p/0x%p)\n",
|
|
__func__, tcon->fscache, cifsi->fscache);
|
|
}
|
|
}
|
|
|
|
void cifs_fscache_release_inode_cookie(struct inode *inode)
|
|
{
|
|
struct cifsInodeInfo *cifsi = CIFS_I(inode);
|
|
|
|
if (cifsi->fscache) {
|
|
cifs_dbg(FYI, "%s: (0x%p)\n", __func__, cifsi->fscache);
|
|
fscache_relinquish_cookie(cifsi->fscache, 0);
|
|
cifsi->fscache = NULL;
|
|
}
|
|
}
|
|
|
|
static void cifs_fscache_disable_inode_cookie(struct inode *inode)
|
|
{
|
|
struct cifsInodeInfo *cifsi = CIFS_I(inode);
|
|
|
|
if (cifsi->fscache) {
|
|
cifs_dbg(FYI, "%s: (0x%p)\n", __func__, cifsi->fscache);
|
|
fscache_uncache_all_inode_pages(cifsi->fscache, inode);
|
|
fscache_relinquish_cookie(cifsi->fscache, 1);
|
|
cifsi->fscache = NULL;
|
|
}
|
|
}
|
|
|
|
void cifs_fscache_set_inode_cookie(struct inode *inode, struct file *filp)
|
|
{
|
|
if ((filp->f_flags & O_ACCMODE) != O_RDONLY)
|
|
cifs_fscache_disable_inode_cookie(inode);
|
|
else
|
|
cifs_fscache_enable_inode_cookie(inode);
|
|
}
|
|
|
|
void cifs_fscache_reset_inode_cookie(struct inode *inode)
|
|
{
|
|
struct cifsInodeInfo *cifsi = CIFS_I(inode);
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
|
|
struct fscache_cookie *old = cifsi->fscache;
|
|
|
|
if (cifsi->fscache) {
|
|
/* retire the current fscache cache and get a new one */
|
|
fscache_relinquish_cookie(cifsi->fscache, 1);
|
|
|
|
cifsi->fscache = fscache_acquire_cookie(
|
|
cifs_sb_master_tcon(cifs_sb)->fscache,
|
|
&cifs_fscache_inode_object_def,
|
|
cifsi, true);
|
|
cifs_dbg(FYI, "%s: new cookie 0x%p oldcookie 0x%p\n",
|
|
__func__, cifsi->fscache, old);
|
|
}
|
|
}
|
|
|
|
int cifs_fscache_release_page(struct page *page, gfp_t gfp)
|
|
{
|
|
if (PageFsCache(page)) {
|
|
struct inode *inode = page->mapping->host;
|
|
struct cifsInodeInfo *cifsi = CIFS_I(inode);
|
|
|
|
cifs_dbg(FYI, "%s: (0x%p/0x%p)\n",
|
|
__func__, page, cifsi->fscache);
|
|
if (!fscache_maybe_release_page(cifsi->fscache, page, gfp))
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void cifs_readpage_from_fscache_complete(struct page *page, void *ctx,
|
|
int error)
|
|
{
|
|
cifs_dbg(FYI, "%s: (0x%p/%d)\n", __func__, page, error);
|
|
if (!error)
|
|
SetPageUptodate(page);
|
|
unlock_page(page);
|
|
}
|
|
|
|
/*
|
|
* Retrieve a page from FS-Cache
|
|
*/
|
|
int __cifs_readpage_from_fscache(struct inode *inode, struct page *page)
|
|
{
|
|
int ret;
|
|
|
|
cifs_dbg(FYI, "%s: (fsc:%p, p:%p, i:0x%p\n",
|
|
__func__, CIFS_I(inode)->fscache, page, inode);
|
|
ret = fscache_read_or_alloc_page(CIFS_I(inode)->fscache, page,
|
|
cifs_readpage_from_fscache_complete,
|
|
NULL,
|
|
GFP_KERNEL);
|
|
switch (ret) {
|
|
|
|
case 0: /* page found in fscache, read submitted */
|
|
cifs_dbg(FYI, "%s: submitted\n", __func__);
|
|
return ret;
|
|
case -ENOBUFS: /* page won't be cached */
|
|
case -ENODATA: /* page not in cache */
|
|
cifs_dbg(FYI, "%s: %d\n", __func__, ret);
|
|
return 1;
|
|
|
|
default:
|
|
cifs_dbg(VFS, "unknown error ret = %d\n", ret);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Retrieve a set of pages from FS-Cache
|
|
*/
|
|
int __cifs_readpages_from_fscache(struct inode *inode,
|
|
struct address_space *mapping,
|
|
struct list_head *pages,
|
|
unsigned *nr_pages)
|
|
{
|
|
int ret;
|
|
|
|
cifs_dbg(FYI, "%s: (0x%p/%u/0x%p)\n",
|
|
__func__, CIFS_I(inode)->fscache, *nr_pages, inode);
|
|
ret = fscache_read_or_alloc_pages(CIFS_I(inode)->fscache, mapping,
|
|
pages, nr_pages,
|
|
cifs_readpage_from_fscache_complete,
|
|
NULL,
|
|
mapping_gfp_mask(mapping));
|
|
switch (ret) {
|
|
case 0: /* read submitted to the cache for all pages */
|
|
cifs_dbg(FYI, "%s: submitted\n", __func__);
|
|
return ret;
|
|
|
|
case -ENOBUFS: /* some pages are not cached and can't be */
|
|
case -ENODATA: /* some pages are not cached */
|
|
cifs_dbg(FYI, "%s: no page\n", __func__);
|
|
return 1;
|
|
|
|
default:
|
|
cifs_dbg(FYI, "unknown error ret = %d\n", ret);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void __cifs_readpage_to_fscache(struct inode *inode, struct page *page)
|
|
{
|
|
int ret;
|
|
|
|
cifs_dbg(FYI, "%s: (fsc: %p, p: %p, i: %p)\n",
|
|
__func__, CIFS_I(inode)->fscache, page, inode);
|
|
ret = fscache_write_page(CIFS_I(inode)->fscache, page, GFP_KERNEL);
|
|
if (ret != 0)
|
|
fscache_uncache_page(CIFS_I(inode)->fscache, page);
|
|
}
|
|
|
|
void __cifs_fscache_readpages_cancel(struct inode *inode, struct list_head *pages)
|
|
{
|
|
cifs_dbg(FYI, "%s: (fsc: %p, i: %p)\n",
|
|
__func__, CIFS_I(inode)->fscache, inode);
|
|
fscache_readpages_cancel(CIFS_I(inode)->fscache, pages);
|
|
}
|
|
|
|
void __cifs_fscache_invalidate_page(struct page *page, struct inode *inode)
|
|
{
|
|
struct cifsInodeInfo *cifsi = CIFS_I(inode);
|
|
struct fscache_cookie *cookie = cifsi->fscache;
|
|
|
|
cifs_dbg(FYI, "%s: (0x%p/0x%p)\n", __func__, page, cookie);
|
|
fscache_wait_on_page_write(cookie, page);
|
|
fscache_uncache_page(cookie, page);
|
|
}
|
|
|