[PATCH 67/67] cifs: Support fscache indexing rewrite (untested)

David Howells
2021-10-18T15:09:48Z

Change the cifs filesystem to take account of the changes to fscache's
indexing rewrite and reenable caching in cifs.

The following changes have been made:

(1) The fscache_netfs struct is no more, and there's no need to register
the filesystem as a whole.

(2) The session cookie is now an fscache_volume cookie, allocated with
fscache_acquire_volume(). That takes three parameters: a string
representing the "volume" in the index, a string naming the cache to
use (or NULL) and a u64 that conveys coherency metadata for the
volume.

For cifs, I've made it render the volume name string as:

"cifs,<ipaddress>,<sharename>"

where the sharename has '/' characters replaced with ';'.

This probably needs rethinking a bit as the total name could exceed
the maximum filename component length.

Further, the coherency data is currently just set to 0. It needs
something else doing with it - I wonder if it would suffice simply to
sum the resource_id, vol_create_time and vol_serial_number or maybe
hash them.

(3) The fscache_cookie_def is no more and needed information is passed
directly to fscache_acquire_cookie(). The cache no longer calls back
into the filesystem, but rather metadata changes are indicated at
other times.

fscache_acquire_cookie() is passed the same keying and coherency
information as before.

(4) The functions to set/reset cookies are removed and
fscache_use_cookie() and fscache_unuse_cookie() are used instead.

fscache_use_cookie() is passed a flag to indicate if the cookie is
opened for writing. fscache_unuse_cookie() is passed updates for the
metadata if we changed it (ie. if the file was opened for writing).

These are called when the file is opened or closed.

(5) cifs_setattr_*() are made to call fscache_resize() to change the size
of the cache object.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Jeff Layton <jlayton@kernel.org>
cc: Steve French <sfrench@samba.org>
cc: Shyam Prasad N <nspmangalore@gmail.com>
cc: linux-cifs@vger.kernel.org
---

fs/cifs/Kconfig | 2 -
fs/cifs/Makefile | 2 -
fs/cifs/cache.c | 105 ---------------------------
fs/cifs/cifsfs.c | 11 +--
fs/cifs/cifsglob.h | 5 -
fs/cifs/connect.c | 3 -
fs/cifs/file.c | 37 ++++++++--
fs/cifs/fscache.c | 201 +++++++++++++---------------------------------------
fs/cifs/fscache.h | 51 +++++--------
fs/cifs/inode.c | 18 +++--
10 files changed, 117 insertions(+), 318 deletions(-)
delete mode 100644 fs/cifs/cache.c

diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig
index c5477abbcff0..3b7e3b9e4fd2 100644
--- a/fs/cifs/Kconfig
+++ b/fs/cifs/Kconfig
@@ -188,7 +188,7 @@ config CIFS_SMB_DIRECT

config CIFS_FSCACHE
bool "Provide CIFS client caching support"
- depends on CIFS=m && FSCACHE_OLD || CIFS=y && FSCACHE_OLD=y
+ depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y
help
Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data
to be cached locally on disk through the general filesystem cache
diff --git a/fs/cifs/Makefile b/fs/cifs/Makefile
index 87fcacdf3de7..cc8fdcb35b71 100644
--- a/fs/cifs/Makefile
+++ b/fs/cifs/Makefile
@@ -25,7 +25,7 @@ cifs-$(CONFIG_CIFS_DFS_UPCALL) += cifs_dfs_ref.o dfs_cache.o

cifs-$(CONFIG_CIFS_SWN_UPCALL) += netlink.o cifs_swn.o

-cifs-$(CONFIG_CIFS_FSCACHE) += fscache.o cache.o
+cifs-$(CONFIG_CIFS_FSCACHE) += fscache.o

cifs-$(CONFIG_CIFS_SMB_DIRECT) += smbdirect.o

diff --git a/fs/cifs/cache.c b/fs/cifs/cache.c
deleted file mode 100644
index 8be57aaedab6..000000000000
--- a/fs/cifs/cache.c
+++ /dev/null
@@ -1,105 +0,0 @@
-// SPDX-License-Identifier: LGPL-2.1
-/*
- * CIFS filesystem cache index structure definitions
- *
- * Copyright (c) 2010 Novell, Inc.
- * Authors(s): Suresh Jayaraman (sjayaraman@suse.de>
- *
- */
-#include "fscache.h"
-#include "cifs_debug.h"
-
-/*
- * CIFS filesystem definition for FS-Cache
- */
-struct fscache_netfs cifs_fscache_netfs = {
- .name = "cifs",
- .version = 0,
-};
-
-/*
- * Register CIFS for caching with FS-Cache
- */
-int cifs_fscache_register(void)
-{
- return fscache_register_netfs(&cifs_fscache_netfs);
-}
-
-/*
- * Unregister CIFS for caching
- */
-void cifs_fscache_unregister(void)
-{
- fscache_unregister_netfs(&cifs_fscache_netfs);
-}
-
-/*
- * Server object for FS-Cache
- */
-const struct fscache_cookie_def cifs_fscache_server_index_def = {
- .name = "CIFS.server",
- .type = FSCACHE_COOKIE_TYPE_INDEX,
-};
-
-static enum
-fscache_checkaux cifs_fscache_super_check_aux(void *cookie_netfs_data,
- const void *data,
- uint16_t datalen,
- loff_t object_size)
-{
- struct cifs_fscache_super_auxdata auxdata;
- const struct cifs_tcon *tcon = cookie_netfs_data;
-
- if (datalen != sizeof(auxdata))
- return FSCACHE_CHECKAUX_OBSOLETE;
-
- memset(&auxdata, 0, sizeof(auxdata));
- auxdata.resource_id = tcon->resource_id;
- auxdata.vol_create_time = tcon->vol_create_time;
- auxdata.vol_serial_number = tcon->vol_serial_number;
-
- if (memcmp(data, &auxdata, datalen) != 0)
- return FSCACHE_CHECKAUX_OBSOLETE;
-
- return FSCACHE_CHECKAUX_OKAY;
-}
-
-/*
- * Superblock object for FS-Cache
- */
-const struct fscache_cookie_def cifs_fscache_super_index_def = {
- .name = "CIFS.super",
- .type = FSCACHE_COOKIE_TYPE_INDEX,
- .check_aux = cifs_fscache_super_check_aux,
-};
-
-static enum
-fscache_checkaux cifs_fscache_inode_check_aux(void *cookie_netfs_data,
- const void *data,
- uint16_t datalen,
- loff_t object_size)
-{
- struct cifs_fscache_inode_auxdata auxdata;
- struct cifsInodeInfo *cifsi = cookie_netfs_data;
-
- if (datalen != sizeof(auxdata))
- return FSCACHE_CHECKAUX_OBSOLETE;
-
- memset(&auxdata, 0, sizeof(auxdata));
- auxdata.eof = cifsi->server_eof;
- auxdata.last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec;
- auxdata.last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec;
- auxdata.last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec;
- auxdata.last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec;
-
- if (memcmp(data, &auxdata, datalen) != 0)
- return FSCACHE_CHECKAUX_OBSOLETE;
-
- return FSCACHE_CHECKAUX_OKAY;
-}
-
-const struct fscache_cookie_def cifs_fscache_inode_object_def = {
- .name = "CIFS.uniqueid",
- .type = FSCACHE_COOKIE_TYPE_DATAFILE,
- .check_aux = cifs_fscache_inode_check_aux,
-};
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 9fa930dfd78d..d44a587a4c32 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -397,6 +397,8 @@ static void
cifs_evict_inode(struct inode *inode)
{
truncate_inode_pages_final(&inode->i_data);
+ if (inode->i_state & I_PINNING_FSCACHE_WB)
+ cifs_fscache_unuse_inode_cookie(inode, true);
clear_inode(inode);
}

@@ -1625,13 +1627,9 @@ init_cifs(void)
goto out_destroy_cifsoplockd_wq;
}

- rc = cifs_fscache_register();
- if (rc)
- goto out_destroy_deferredclose_wq;
-
rc = cifs_init_inodecache();
if (rc)
- goto out_unreg_fscache;
+ goto out_destroy_deferredclose_wq;

rc = cifs_init_mids();
if (rc)
@@ -1693,8 +1691,6 @@ init_cifs(void)
cifs_destroy_mids();
out_destroy_inodecache:
cifs_destroy_inodecache();
-out_unreg_fscache:
- cifs_fscache_unregister();
out_destroy_deferredclose_wq:
destroy_workqueue(deferredclose_wq);
out_destroy_cifsoplockd_wq:
@@ -1730,7 +1726,6 @@ exit_cifs(void)
cifs_destroy_request_bufs();
cifs_destroy_mids();
cifs_destroy_inodecache();
- cifs_fscache_unregister();
destroy_workqueue(deferredclose_wq);
destroy_workqueue(cifsoplockd_wq);
destroy_workqueue(decrypt_wq);
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index e916470468ea..d749250af775 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -653,9 +653,6 @@ struct TCP_Server_Info {
unsigned int total_read; /* total amount of data read in this pass */
atomic_t in_send; /* requests trying to send */
atomic_t num_waiters; /* blocked waiting to get in sendrecv */
-#ifdef CONFIG_CIFS_FSCACHE
- struct fscache_cookie *fscache; /* client index cache cookie */
-#endif
#ifdef CONFIG_CIFS_STATS2
atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */
atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
@@ -1084,7 +1081,7 @@ struct cifs_tcon {
__u32 max_bytes_copy;
#ifdef CONFIG_CIFS_FSCACHE
u64 resource_id; /* server resource id */
- struct fscache_cookie *fscache; /* cookie for share */
+ struct fscache_volume *fscache; /* cookie for share */
#endif
struct list_head pending_opens; /* list of incomplete opens */
struct cached_fid crfid; /* Cached root fid */
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index c3b94c1e4591..db13e0f8bc4c 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1331,7 +1331,6 @@ cifs_put_tcp_session(struct TCP_Server_Info *server, int from_reconnect)
spin_unlock(&GlobalMid_Lock);

cifs_crypto_secmech_release(server);
- cifs_fscache_release_client_cookie(server);

kfree(server->session_key.response);
server->session_key.response = NULL;
@@ -1477,8 +1476,6 @@ cifs_get_tcp_session(struct smb3_fs_context *ctx)
list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
spin_unlock(&cifs_tcp_ses_lock);

- cifs_fscache_get_client_cookie(tcp_ses);
-
/* queue echo request delayed work */
queue_delayed_work(cifsiod_wq, &tcp_ses->echo, tcp_ses->echo_interval);

diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 02894e999c56..04c841354077 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -632,7 +632,18 @@ int cifs_open(struct inode *inode, struct file *file)
goto out;
}

- cifs_fscache_set_inode_cookie(inode, file);
+
+ fscache_use_cookie(cifs_inode_cookie(file_inode(file)),
+ file->f_mode & FMODE_WRITE);
+ if (file->f_flags & O_DIRECT &&
+ (!((file->f_flags & O_ACCMODE) != O_RDONLY) ||
+ file->f_flags & O_APPEND)) {
+ struct cifs_fscache_inode_auxdata auxdata;
+ cifs_fscache_fill_auxdata(file_inode(file), &auxdata);
+ fscache_invalidate(cifs_inode_cookie(file_inode(file)),
+ &auxdata, i_size_read(file_inode(file)),
+ FSCACHE_INVAL_DIO_WRITE);
+ }

if ((oplock & CIFS_CREATE_ACTION) && !posix_open_ok && tcon->unix_ext) {
/*
@@ -876,6 +887,8 @@ int cifs_close(struct inode *inode, struct file *file)
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct cifs_deferred_close *dclose;

+ cifs_fscache_unuse_inode_cookie(inode, file->f_mode & FMODE_WRITE);
+
if (file->private_data != NULL) {
cfile = file->private_data;
file->private_data = NULL;
@@ -886,7 +899,6 @@ int cifs_close(struct inode *inode, struct file *file)
dclose) {
if (test_and_clear_bit(CIFS_INO_MODIFIED_ATTR, &cinode->flags)) {
inode->i_ctime = inode->i_mtime = current_time(inode);
- cifs_fscache_update_inode_cookie(inode);
}
spin_lock(&cinode->deferred_lock);
cifs_add_deferred_close(cfile, dclose);
@@ -4787,14 +4799,14 @@ static int cifs_release_page(struct page *page, gfp_t gfp)
return false;
wait_on_page_fscache(page);
}
+ fscache_note_page_release(cifs_inode_cookie(page->mapping->host));
return true;
}

static void cifs_invalidate_page(struct page *page, unsigned int offset,
unsigned int length)
{
- if (offset == 0 && length == PAGE_SIZE)
- wait_on_page_fscache(page);
+ wait_on_page_fscache(page);
}

static int cifs_launder_page(struct page *page)
@@ -4971,6 +4983,19 @@ static void cifs_swap_deactivate(struct file *file)
/* do we need to unpin (or unlock) the file */
}

+/*
+ * Mark a page as having been made dirty and thus needing writeback. We also
+ * need to pin the cache object to write back to.
+ */
+#ifdef CONFIG_CIFS_FSCACHE
+static int cifs_set_page_dirty(struct page *page)
+{
+ return fscache_set_page_dirty(page, cifs_inode_cookie(page->mapping->host));
+}
+#else
+#define cifs_set_page_dirty __set_page_dirty_nobuffers
+#endif
+
const struct address_space_operations cifs_addr_ops = {
.readpage = cifs_readpage,
.readpages = cifs_readpages,
@@ -4978,7 +5003,7 @@ const struct address_space_operations cifs_addr_ops = {
.writepages = cifs_writepages,
.write_begin = cifs_write_begin,
.write_end = cifs_write_end,
- .set_page_dirty = __set_page_dirty_nobuffers,
+ .set_page_dirty = cifs_set_page_dirty,
.releasepage = cifs_release_page,
.direct_IO = cifs_direct_io,
.invalidatepage = cifs_invalidate_page,
@@ -5003,7 +5028,7 @@ const struct address_space_operations cifs_addr_ops_smallbuf = {
.writepages = cifs_writepages,
.write_begin = cifs_write_begin,
.write_end = cifs_write_end,
- .set_page_dirty = __set_page_dirty_nobuffers,
+ .set_page_dirty = cifs_set_page_dirty,
.releasepage = cifs_release_page,
.invalidatepage = cifs_invalidate_page,
.launder_page = cifs_launder_page,
diff --git a/fs/cifs/fscache.c b/fs/cifs/fscache.c
index d6ff668c268a..fa397e734b5c 100644
--- a/fs/cifs/fscache.c
+++ b/fs/cifs/fscache.c
@@ -12,217 +12,114 @@
#include "cifs_fs_sb.h"
#include "cifsproto.h"

-/*
- * Key layout of CIFS server cache index object
- */
-struct cifs_server_key {
- struct {
- uint16_t family; /* address family */
- __be16 port; /* IP port */
- } hdr;
- union {
- struct in_addr ipv4_addr;
- struct in6_addr ipv6_addr;
- };
-} __packed;
-
-/*
- * Get a cookie for a server object keyed by {IPaddress,port,family} tuple
- */
-void cifs_fscache_get_client_cookie(struct TCP_Server_Info *server)
+void cifs_fscache_get_super_cookie(struct cifs_tcon *tcon)
{
- const struct sockaddr *sa = (struct sockaddr *) &server->dstaddr;
- const struct sockaddr_in *addr = (struct sockaddr_in *) sa;
- const struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) sa;
- struct cifs_server_key key;
- uint16_t key_len = sizeof(key.hdr);
-
- memset(&key, 0, sizeof(key));
+ struct cifs_fscache_super_auxdata auxdata;
+ struct TCP_Server_Info *server = tcon->ses->server;
+ const struct sockaddr *sa = (struct sockaddr *)&server->dstaddr;
+ size_t slen, i;
+ char *sharename;
+ char *key;

- /*
- * Should not be a problem as sin_family/sin6_family overlays
- * sa_family field
- */
- key.hdr.family = sa->sa_family;
+ tcon->fscache = NULL;
switch (sa->sa_family) {
case AF_INET:
- key.hdr.port = addr->sin_port;
- key.ipv4_addr = addr->sin_addr;
- key_len += sizeof(key.ipv4_addr);
- break;
-
case AF_INET6:
- key.hdr.port = addr6->sin6_port;
- key.ipv6_addr = addr6->sin6_addr;
- key_len += sizeof(key.ipv6_addr);
break;
-
default:
cifs_dbg(VFS, "Unknown network family '%d'\n", sa->sa_family);
- server->fscache = NULL;
return;
}

- server->fscache =
- fscache_acquire_cookie(cifs_fscache_netfs.primary_index,
- &cifs_fscache_server_index_def,
- &key, key_len,
- NULL, 0,
- server, 0, 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, NULL, false);
- server->fscache = NULL;
-}
-
-void cifs_fscache_get_super_cookie(struct cifs_tcon *tcon)
-{
- struct TCP_Server_Info *server = tcon->ses->server;
- char *sharename;
- struct cifs_fscache_super_auxdata auxdata;
-
sharename = extract_sharename(tcon->treeName);
if (IS_ERR(sharename)) {
cifs_dbg(FYI, "%s: couldn't extract sharename\n", __func__);
- tcon->fscache = NULL;
return;
}

+ slen = strlen(sharename);
+ for (i = 0; i < slen; i++)
+ if (sharename[i] == '/')
+ sharename[i] = ';';
+
+ key = kasprintf(GFP_KERNEL, "cifs,%pISpc,%s", sa, sharename);
+ if (!key)
+ goto out;
+
memset(&auxdata, 0, sizeof(auxdata));
auxdata.resource_id = tcon->resource_id;
auxdata.vol_create_time = tcon->vol_create_time;
auxdata.vol_serial_number = tcon->vol_serial_number;
+ // TODO: Do something with the volume coherency data

- tcon->fscache =
- fscache_acquire_cookie(server->fscache,
- &cifs_fscache_super_index_def,
- sharename, strlen(sharename),
- &auxdata, sizeof(auxdata),
- tcon, 0, true);
+ tcon->fscache = fscache_acquire_volume(key,
+ NULL, /* preferred_cache */
+ 0 /* coherency_data */);
+ cifs_dbg(FYI, "%s: (%s/0x%p)\n", __func__, key, tcon->fscache);
+
+ kfree(key);
+out:
kfree(sharename);
- cifs_dbg(FYI, "%s: (0x%p/0x%p)\n",
- __func__, server->fscache, tcon->fscache);
}

void cifs_fscache_release_super_cookie(struct cifs_tcon *tcon)
{
struct cifs_fscache_super_auxdata auxdata;

+ cifs_dbg(FYI, "%s: (0x%p)\n", __func__, tcon->fscache);
+
memset(&auxdata, 0, sizeof(auxdata));
auxdata.resource_id = tcon->resource_id;
auxdata.vol_create_time = tcon->vol_create_time;
auxdata.vol_serial_number = tcon->vol_serial_number;
+ // TODO: Do something with the volume coherency data

- cifs_dbg(FYI, "%s: (0x%p)\n", __func__, tcon->fscache);
- fscache_relinquish_cookie(tcon->fscache, &auxdata, false);
+ fscache_relinquish_volume(tcon->fscache,
+ 0, /* coherency_data */
+ false);
tcon->fscache = NULL;
}

-static void cifs_fscache_acquire_inode_cookie(struct cifsInodeInfo *cifsi,
- struct cifs_tcon *tcon)
+void cifs_fscache_get_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);
struct cifs_fscache_inode_auxdata auxdata;

- memset(&auxdata, 0, sizeof(auxdata));
- auxdata.eof = cifsi->server_eof;
- auxdata.last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec;
- auxdata.last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec;
- auxdata.last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec;
- auxdata.last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec;
+ cifs_fscache_fill_auxdata(&cifsi->vfs_inode, &auxdata);

cifsi->fscache =
- fscache_acquire_cookie(tcon->fscache,
- &cifs_fscache_inode_object_def,
+ fscache_acquire_cookie(tcon->fscache, 0,
&cifsi->uniqueid, sizeof(cifsi->uniqueid),
&auxdata, sizeof(auxdata),
- cifsi, cifsi->vfs_inode.i_size, true);
+ cifsi->vfs_inode.i_size);
}

-static void cifs_fscache_enable_inode_cookie(struct inode *inode)
+void cifs_fscache_unuse_inode_cookie(struct inode *inode, bool update)
{
- 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))
- return;
-
- cifs_fscache_acquire_inode_cookie(cifsi, tcon);
-
- cifs_dbg(FYI, "%s: got FH cookie (0x%p/0x%p)\n",
- __func__, tcon->fscache, cifsi->fscache);
+ if (update) {
+ struct cifs_fscache_inode_auxdata auxdata;
+ loff_t i_size = i_size_read(inode);
+
+ cifs_fscache_fill_auxdata(inode, &auxdata);
+ fscache_unuse_cookie(cifs_inode_cookie(inode), &auxdata, &i_size);
+ } else {
+ fscache_unuse_cookie(cifs_inode_cookie(inode), NULL, NULL);
+ }
}

void cifs_fscache_release_inode_cookie(struct inode *inode)
{
- struct cifs_fscache_inode_auxdata auxdata;
struct cifsInodeInfo *cifsi = CIFS_I(inode);

if (cifsi->fscache) {
- memset(&auxdata, 0, sizeof(auxdata));
- auxdata.eof = cifsi->server_eof;
- auxdata.last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec;
- auxdata.last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec;
- auxdata.last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec;
- auxdata.last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec;
-
cifs_dbg(FYI, "%s: (0x%p)\n", __func__, cifsi->fscache);
- /* fscache_relinquish_cookie does not seem to update auxdata */
- fscache_update_cookie(cifsi->fscache, &auxdata);
- fscache_relinquish_cookie(cifsi->fscache, &auxdata, false);
+ fscache_relinquish_cookie(cifsi->fscache, false);
cifsi->fscache = NULL;
}
}

-void cifs_fscache_update_inode_cookie(struct inode *inode)
-{
- struct cifs_fscache_inode_auxdata auxdata;
- struct cifsInodeInfo *cifsi = CIFS_I(inode);
-
- if (cifsi->fscache) {
- memset(&auxdata, 0, sizeof(auxdata));
- auxdata.eof = cifsi->server_eof;
- auxdata.last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec;
- auxdata.last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec;
- auxdata.last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec;
- auxdata.last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec;
-
- cifs_dbg(FYI, "%s: (0x%p)\n", __func__, cifsi->fscache);
- fscache_update_cookie(cifsi->fscache, &auxdata);
- }
-}
-
-void cifs_fscache_set_inode_cookie(struct inode *inode, struct file *filp)
-{
- 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 cifs_tcon *tcon = cifs_sb_master_tcon(cifs_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, NULL, true);
-
- cifs_fscache_acquire_inode_cookie(cifsi, tcon);
- cifs_dbg(FYI, "%s: new cookie 0x%p oldcookie 0x%p\n",
- __func__, cifsi->fscache, old);
- }
-}
-
/*
* Retrieve a page from FS-Cache
*/
diff --git a/fs/cifs/fscache.h b/fs/cifs/fscache.h
index 081481645b77..886a47a4c409 100644
--- a/fs/cifs/fscache.h
+++ b/fs/cifs/fscache.h
@@ -33,32 +33,31 @@ struct cifs_fscache_inode_auxdata {
u64 last_change_time_sec;
u32 last_write_time_nsec;
u32 last_change_time_nsec;
- u64 eof;
};

-/*
- * cache.c
- */
-extern struct fscache_netfs cifs_fscache_netfs;
-extern const struct fscache_cookie_def cifs_fscache_server_index_def;
-extern const struct fscache_cookie_def cifs_fscache_super_index_def;
-extern const struct fscache_cookie_def cifs_fscache_inode_object_def;
-
-extern int cifs_fscache_register(void);
-extern void cifs_fscache_unregister(void);
-
/*
* fscache.c
*/
-extern void cifs_fscache_get_client_cookie(struct TCP_Server_Info *);
-extern void cifs_fscache_release_client_cookie(struct TCP_Server_Info *);
extern void cifs_fscache_get_super_cookie(struct cifs_tcon *);
extern void cifs_fscache_release_super_cookie(struct cifs_tcon *);

+extern void cifs_fscache_get_inode_cookie(struct inode *);
extern void cifs_fscache_release_inode_cookie(struct inode *);
-extern void cifs_fscache_update_inode_cookie(struct inode *inode);
-extern void cifs_fscache_set_inode_cookie(struct inode *, struct file *);
-extern void cifs_fscache_reset_inode_cookie(struct inode *);
+extern void cifs_fscache_unuse_inode_cookie(struct inode *, bool);
+
+static inline
+void cifs_fscache_fill_auxdata(struct inode *inode,
+ struct cifs_fscache_inode_auxdata *auxdata)
+{
+ struct cifsInodeInfo *cifsi = CIFS_I(inode);
+
+ memset(&auxdata, 0, sizeof(auxdata));
+ auxdata->last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec;
+ auxdata->last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec;
+ auxdata->last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec;
+ auxdata->last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec;
+}
+

extern int __cifs_readpage_from_fscache(struct inode *, struct page *);
extern void __cifs_readpage_to_fscache(struct inode *, struct page *);
@@ -85,23 +84,13 @@ static inline struct fscache_cookie *cifs_inode_cookie(struct inode *inode)
}

#else /* CONFIG_CIFS_FSCACHE */
-static inline int cifs_fscache_register(void) { return 0; }
-static inline void cifs_fscache_unregister(void) {}
-
-static inline void
-cifs_fscache_get_client_cookie(struct TCP_Server_Info *server) {}
-static inline void
-cifs_fscache_release_client_cookie(struct TCP_Server_Info *server) {}
static inline void cifs_fscache_get_super_cookie(struct cifs_tcon *tcon) {}
-static inline void
-cifs_fscache_release_super_cookie(struct cifs_tcon *tcon) {}
+static inline void cifs_fscache_release_super_cookie(struct cifs_tcon *tcon) {}

+static inline void cifs_fscache_get_inode_cookie(struct inode *inode) {}
static inline void cifs_fscache_release_inode_cookie(struct inode *inode) {}
-static inline void cifs_fscache_update_inode_cookie(struct inode *inode) {}
-static inline void cifs_fscache_set_inode_cookie(struct inode *inode,
- struct file *filp) {}
-static inline void cifs_fscache_reset_inode_cookie(struct inode *inode) {}
-
+static inline void cifs_fscache_unuse_inode_cookie(struct inode *inode) {}
+static inline struct fscache_cookie *cifs_inode_cookie(struct inode *inode) { return NULL; }

static inline int
cifs_readpage_from_fscache(struct inode *inode, struct page *page)
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 82848412ad85..384d7b8686b1 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1298,10 +1298,7 @@ cifs_iget(struct super_block *sb, struct cifs_fattr *fattr)
inode->i_flags |= S_NOATIME | S_NOCMTIME;
if (inode->i_state & I_NEW) {
inode->i_ino = hash;
-#ifdef CONFIG_CIFS_FSCACHE
- /* initialize per-inode cache cookie pointer */
- CIFS_I(inode)->fscache = NULL;
-#endif
+ cifs_fscache_get_inode_cookie(inode);
unlock_new_inode(inode);
}
}
@@ -2263,6 +2260,8 @@ cifs_dentry_needs_reval(struct dentry *dentry)
int
cifs_invalidate_mapping(struct inode *inode)
{
+ struct cifs_fscache_inode_auxdata auxdata;
+ struct cifsInodeInfo *cifsi = CIFS_I(inode);
int rc = 0;

if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
@@ -2272,7 +2271,8 @@ cifs_invalidate_mapping(struct inode *inode)
__func__, inode);
}

- cifs_fscache_reset_inode_cookie(inode);
+ cifs_fscache_fill_auxdata(&cifsi->vfs_inode, &auxdata);
+ fscache_invalidate(cifs_inode_cookie(inode), &auxdata, i_size_read(inode), 0);
return rc;
}

@@ -2777,8 +2777,10 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
goto out;

if ((attrs->ia_valid & ATTR_SIZE) &&
- attrs->ia_size != i_size_read(inode))
+ attrs->ia_size != i_size_read(inode)) {
truncate_setsize(inode, attrs->ia_size);
+ fscache_resize_cookie(cifs_inode_cookie(inode), attrs->ia_size);
+ }

setattr_copy(&init_user_ns, inode, attrs);
mark_inode_dirty(inode);
@@ -2973,8 +2975,10 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
goto cifs_setattr_exit;

if ((attrs->ia_valid & ATTR_SIZE) &&
- attrs->ia_size != i_size_read(inode))
+ attrs->ia_size != i_size_read(inode)) {
truncate_setsize(inode, attrs->ia_size);
+ fscache_resize_cookie(cifs_inode_cookie(inode), attrs->ia_size);
+ }

setattr_copy(&init_user_ns, inode, attrs);
mark_inode_dirty(inode);