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-rw-r--r--fs/afs/cache.c402
1 files changed, 0 insertions, 402 deletions
diff --git a/fs/afs/cache.c b/fs/afs/cache.c
deleted file mode 100644
index 577763c3d88b..000000000000
--- a/fs/afs/cache.c
+++ /dev/null
@@ -1,402 +0,0 @@
-/* AFS caching stuff
- *
- * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/sched.h>
-#include "internal.h"
-
-static uint16_t afs_cell_cache_get_key(const void *cookie_netfs_data,
- void *buffer, uint16_t buflen);
-static uint16_t afs_cell_cache_get_aux(const void *cookie_netfs_data,
- void *buffer, uint16_t buflen);
-static enum fscache_checkaux afs_cell_cache_check_aux(void *cookie_netfs_data,
- const void *buffer,
- uint16_t buflen);
-
-static uint16_t afs_vlocation_cache_get_key(const void *cookie_netfs_data,
- void *buffer, uint16_t buflen);
-static uint16_t afs_vlocation_cache_get_aux(const void *cookie_netfs_data,
- void *buffer, uint16_t buflen);
-static enum fscache_checkaux afs_vlocation_cache_check_aux(
- void *cookie_netfs_data, const void *buffer, uint16_t buflen);
-
-static uint16_t afs_volume_cache_get_key(const void *cookie_netfs_data,
- void *buffer, uint16_t buflen);
-
-static uint16_t afs_vnode_cache_get_key(const void *cookie_netfs_data,
- void *buffer, uint16_t buflen);
-static void afs_vnode_cache_get_attr(const void *cookie_netfs_data,
- uint64_t *size);
-static uint16_t afs_vnode_cache_get_aux(const void *cookie_netfs_data,
- void *buffer, uint16_t buflen);
-static enum fscache_checkaux afs_vnode_cache_check_aux(void *cookie_netfs_data,
- const void *buffer,
- uint16_t buflen);
-static void afs_vnode_cache_now_uncached(void *cookie_netfs_data);
-
-struct fscache_netfs afs_cache_netfs = {
- .name = "afs",
- .version = 0,
-};
-
-struct fscache_cookie_def afs_cell_cache_index_def = {
- .name = "AFS.cell",
- .type = FSCACHE_COOKIE_TYPE_INDEX,
- .get_key = afs_cell_cache_get_key,
- .get_aux = afs_cell_cache_get_aux,
- .check_aux = afs_cell_cache_check_aux,
-};
-
-struct fscache_cookie_def afs_vlocation_cache_index_def = {
- .name = "AFS.vldb",
- .type = FSCACHE_COOKIE_TYPE_INDEX,
- .get_key = afs_vlocation_cache_get_key,
- .get_aux = afs_vlocation_cache_get_aux,
- .check_aux = afs_vlocation_cache_check_aux,
-};
-
-struct fscache_cookie_def afs_volume_cache_index_def = {
- .name = "AFS.volume",
- .type = FSCACHE_COOKIE_TYPE_INDEX,
- .get_key = afs_volume_cache_get_key,
-};
-
-struct fscache_cookie_def afs_vnode_cache_index_def = {
- .name = "AFS.vnode",
- .type = FSCACHE_COOKIE_TYPE_DATAFILE,
- .get_key = afs_vnode_cache_get_key,
- .get_attr = afs_vnode_cache_get_attr,
- .get_aux = afs_vnode_cache_get_aux,
- .check_aux = afs_vnode_cache_check_aux,
- .now_uncached = afs_vnode_cache_now_uncached,
-};
-
-/*
- * set the key for the index entry
- */
-static uint16_t afs_cell_cache_get_key(const void *cookie_netfs_data,
- void *buffer, uint16_t bufmax)
-{
- const struct afs_cell *cell = cookie_netfs_data;
- uint16_t klen;
-
- _enter("%p,%p,%u", cell, buffer, bufmax);
-
- klen = strlen(cell->name);
- if (klen > bufmax)
- return 0;
-
- memcpy(buffer, cell->name, klen);
- return klen;
-}
-
-/*
- * provide new auxiliary cache data
- */
-static uint16_t afs_cell_cache_get_aux(const void *cookie_netfs_data,
- void *buffer, uint16_t bufmax)
-{
- const struct afs_cell *cell = cookie_netfs_data;
- uint16_t dlen;
-
- _enter("%p,%p,%u", cell, buffer, bufmax);
-
- dlen = cell->vl_naddrs * sizeof(cell->vl_addrs[0]);
- dlen = min(dlen, bufmax);
- dlen &= ~(sizeof(cell->vl_addrs[0]) - 1);
-
- memcpy(buffer, cell->vl_addrs, dlen);
- return dlen;
-}
-
-/*
- * check that the auxiliary data indicates that the entry is still valid
- */
-static enum fscache_checkaux afs_cell_cache_check_aux(void *cookie_netfs_data,
- const void *buffer,
- uint16_t buflen)
-{
- _leave(" = OKAY");
- return FSCACHE_CHECKAUX_OKAY;
-}
-
-/*****************************************************************************/
-/*
- * set the key for the index entry
- */
-static uint16_t afs_vlocation_cache_get_key(const void *cookie_netfs_data,
- void *buffer, uint16_t bufmax)
-{
- const struct afs_vlocation *vlocation = cookie_netfs_data;
- uint16_t klen;
-
- _enter("{%s},%p,%u", vlocation->vldb.name, buffer, bufmax);
-
- klen = strnlen(vlocation->vldb.name, sizeof(vlocation->vldb.name));
- if (klen > bufmax)
- return 0;
-
- memcpy(buffer, vlocation->vldb.name, klen);
-
- _leave(" = %u", klen);
- return klen;
-}
-
-/*
- * provide new auxiliary cache data
- */
-static uint16_t afs_vlocation_cache_get_aux(const void *cookie_netfs_data,
- void *buffer, uint16_t bufmax)
-{
- const struct afs_vlocation *vlocation = cookie_netfs_data;
- uint16_t dlen;
-
- _enter("{%s},%p,%u", vlocation->vldb.name, buffer, bufmax);
-
- dlen = sizeof(struct afs_cache_vlocation);
- dlen -= offsetof(struct afs_cache_vlocation, nservers);
- if (dlen > bufmax)
- return 0;
-
- memcpy(buffer, (uint8_t *)&vlocation->vldb.nservers, dlen);
-
- _leave(" = %u", dlen);
- return dlen;
-}
-
-/*
- * check that the auxiliary data indicates that the entry is still valid
- */
-static
-enum fscache_checkaux afs_vlocation_cache_check_aux(void *cookie_netfs_data,
- const void *buffer,
- uint16_t buflen)
-{
- const struct afs_cache_vlocation *cvldb;
- struct afs_vlocation *vlocation = cookie_netfs_data;
- uint16_t dlen;
-
- _enter("{%s},%p,%u", vlocation->vldb.name, buffer, buflen);
-
- /* check the size of the data is what we're expecting */
- dlen = sizeof(struct afs_cache_vlocation);
- dlen -= offsetof(struct afs_cache_vlocation, nservers);
- if (dlen != buflen)
- return FSCACHE_CHECKAUX_OBSOLETE;
-
- cvldb = container_of(buffer, struct afs_cache_vlocation, nservers);
-
- /* if what's on disk is more valid than what's in memory, then use the
- * VL record from the cache */
- if (!vlocation->valid || vlocation->vldb.rtime == cvldb->rtime) {
- memcpy((uint8_t *)&vlocation->vldb.nservers, buffer, dlen);
- vlocation->valid = 1;
- _leave(" = SUCCESS [c->m]");
- return FSCACHE_CHECKAUX_OKAY;
- }
-
- /* need to update the cache if the cached info differs */
- if (memcmp(&vlocation->vldb, buffer, dlen) != 0) {
- /* delete if the volume IDs for this name differ */
- if (memcmp(&vlocation->vldb.vid, &cvldb->vid,
- sizeof(cvldb->vid)) != 0
- ) {
- _leave(" = OBSOLETE");
- return FSCACHE_CHECKAUX_OBSOLETE;
- }
-
- _leave(" = UPDATE");
- return FSCACHE_CHECKAUX_NEEDS_UPDATE;
- }
-
- _leave(" = OKAY");
- return FSCACHE_CHECKAUX_OKAY;
-}
-
-/*****************************************************************************/
-/*
- * set the key for the volume index entry
- */
-static uint16_t afs_volume_cache_get_key(const void *cookie_netfs_data,
- void *buffer, uint16_t bufmax)
-{
- const struct afs_volume *volume = cookie_netfs_data;
- uint16_t klen;
-
- _enter("{%u},%p,%u", volume->type, buffer, bufmax);
-
- klen = sizeof(volume->type);
- if (klen > bufmax)
- return 0;
-
- memcpy(buffer, &volume->type, sizeof(volume->type));
-
- _leave(" = %u", klen);
- return klen;
-
-}
-
-/*****************************************************************************/
-/*
- * set the key for the index entry
- */
-static uint16_t afs_vnode_cache_get_key(const void *cookie_netfs_data,
- void *buffer, uint16_t bufmax)
-{
- const struct afs_vnode *vnode = cookie_netfs_data;
- uint16_t klen;
-
- _enter("{%x,%x,%llx},%p,%u",
- vnode->fid.vnode, vnode->fid.unique, vnode->status.data_version,
- buffer, bufmax);
-
- klen = sizeof(vnode->fid.vnode);
- if (klen > bufmax)
- return 0;
-
- memcpy(buffer, &vnode->fid.vnode, sizeof(vnode->fid.vnode));
-
- _leave(" = %u", klen);
- return klen;
-}
-
-/*
- * provide updated file attributes
- */
-static void afs_vnode_cache_get_attr(const void *cookie_netfs_data,
- uint64_t *size)
-{
- const struct afs_vnode *vnode = cookie_netfs_data;
-
- _enter("{%x,%x,%llx},",
- vnode->fid.vnode, vnode->fid.unique,
- vnode->status.data_version);
-
- *size = vnode->status.size;
-}
-
-/*
- * provide new auxiliary cache data
- */
-static uint16_t afs_vnode_cache_get_aux(const void *cookie_netfs_data,
- void *buffer, uint16_t bufmax)
-{
- const struct afs_vnode *vnode = cookie_netfs_data;
- uint16_t dlen;
-
- _enter("{%x,%x,%Lx},%p,%u",
- vnode->fid.vnode, vnode->fid.unique, vnode->status.data_version,
- buffer, bufmax);
-
- dlen = sizeof(vnode->fid.unique) + sizeof(vnode->status.data_version);
- if (dlen > bufmax)
- return 0;
-
- memcpy(buffer, &vnode->fid.unique, sizeof(vnode->fid.unique));
- buffer += sizeof(vnode->fid.unique);
- memcpy(buffer, &vnode->status.data_version,
- sizeof(vnode->status.data_version));
-
- _leave(" = %u", dlen);
- return dlen;
-}
-
-/*
- * check that the auxiliary data indicates that the entry is still valid
- */
-static enum fscache_checkaux afs_vnode_cache_check_aux(void *cookie_netfs_data,
- const void *buffer,
- uint16_t buflen)
-{
- struct afs_vnode *vnode = cookie_netfs_data;
- uint16_t dlen;
-
- _enter("{%x,%x,%llx},%p,%u",
- vnode->fid.vnode, vnode->fid.unique, vnode->status.data_version,
- buffer, buflen);
-
- /* check the size of the data is what we're expecting */
- dlen = sizeof(vnode->fid.unique) + sizeof(vnode->status.data_version);
- if (dlen != buflen) {
- _leave(" = OBSOLETE [len %hx != %hx]", dlen, buflen);
- return FSCACHE_CHECKAUX_OBSOLETE;
- }
-
- if (memcmp(buffer,
- &vnode->fid.unique,
- sizeof(vnode->fid.unique)
- ) != 0) {
- unsigned unique;
-
- memcpy(&unique, buffer, sizeof(unique));
-
- _leave(" = OBSOLETE [uniq %x != %x]",
- unique, vnode->fid.unique);
- return FSCACHE_CHECKAUX_OBSOLETE;
- }
-
- if (memcmp(buffer + sizeof(vnode->fid.unique),
- &vnode->status.data_version,
- sizeof(vnode->status.data_version)
- ) != 0) {
- afs_dataversion_t version;
-
- memcpy(&version, buffer + sizeof(vnode->fid.unique),
- sizeof(version));
-
- _leave(" = OBSOLETE [vers %llx != %llx]",
- version, vnode->status.data_version);
- return FSCACHE_CHECKAUX_OBSOLETE;
- }
-
- _leave(" = SUCCESS");
- return FSCACHE_CHECKAUX_OKAY;
-}
-
-/*
- * indication the cookie is no longer uncached
- * - this function is called when the backing store currently caching a cookie
- * is removed
- * - the netfs should use this to clean up any markers indicating cached pages
- * - this is mandatory for any object that may have data
- */
-static void afs_vnode_cache_now_uncached(void *cookie_netfs_data)
-{
- struct afs_vnode *vnode = cookie_netfs_data;
- struct pagevec pvec;
- pgoff_t first;
- int loop, nr_pages;
-
- _enter("{%x,%x,%Lx}",
- vnode->fid.vnode, vnode->fid.unique, vnode->status.data_version);
-
- pagevec_init(&pvec, 0);
- first = 0;
-
- for (;;) {
- /* grab a bunch of pages to clean */
- nr_pages = pagevec_lookup(&pvec, vnode->vfs_inode.i_mapping,
- first,
- PAGEVEC_SIZE - pagevec_count(&pvec));
- if (!nr_pages)
- break;
-
- for (loop = 0; loop < nr_pages; loop++)
- ClearPageFsCache(pvec.pages[loop]);
-
- first = pvec.pages[nr_pages - 1]->index + 1;
-
- pvec.nr = nr_pages;
- pagevec_release(&pvec);
- cond_resched();
- }
-
- _leave("");
-}
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