/* Filesystem index definition * * Copyright (C) 2004-2007 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. */ #define FSCACHE_DEBUG_LEVEL CACHE #include #include "internal.h" static uint16_t fscache_fsdef_netfs_get_key(const void *cookie_netfs_data, void *buffer, uint16_t bufmax); static uint16_t fscache_fsdef_netfs_get_aux(const void *cookie_netfs_data, void *buffer, uint16_t bufmax); static enum fscache_checkaux fscache_fsdef_netfs_check_aux(void *cookie_netfs_data, const void *data, uint16_t datalen); /* * The root index is owned by FS-Cache itself. * * When a netfs requests caching facilities, FS-Cache will, if one doesn't * already exist, create an entry in the root index with the key being the name * of the netfs ("AFS" for example), and the auxiliary data holding the index * structure version supplied by the netfs: * * FSDEF * | * +-----------+ * | | * NFS AFS * [v=1] [v=1] * * If an entry with the appropriate name does already exist, the version is * compared. If the version is different, the entire subtree from that entry * will be discarded and a new entry created. * * The new entry will be an index, and a cookie referring to it will be passed * to the netfs. This is then the root handle by which the netfs accesses the * cache. It can create whatever objects it likes in that index, including * further indices. */ static struct fscache_cookie_def fscache_fsdef_index_def = { .name = ".FS-Cache", .type = FSCACHE_COOKIE_TYPE_INDEX, }; struct fscache_cookie fscache_fsdef_index = { .usage = ATOMIC_INIT(1), .n_active = ATOMIC_INIT(1), .lock = __SPIN_LOCK_UNLOCKED(fscache_fsdef_index.lock), .backing_objects = HLIST_HEAD_INIT, .def = &fscache_fsdef_index_def, .flags = 1 << FSCACHE_COOKIE_ENABLED, }; EXPORT_SYMBOL(fscache_fsdef_index); /* * Definition of an entry in the root index. Each entry is an index, keyed to * a specific netfs and only applicable to a particular version of the index * structure used by that netfs. */ struct fscache_cookie_def fscache_fsdef_netfs_def = { .name = "FSDEF.netfs", .type = FSCACHE_COOKIE_TYPE_INDEX, .get_key = fscache_fsdef_netfs_get_key, .get_aux = fscache_fsdef_netfs_get_aux, .check_aux = fscache_fsdef_netfs_check_aux, }; /* * get the key data for an FSDEF index record - this is the name of the netfs * for which this entry is created */ static uint16_t fscache_fsdef_netfs_get_key(const void *cookie_netfs_data, void *buffer, uint16_t bufmax) { const struct fscache_netfs *netfs = cookie_netfs_data; unsigned klen; _enter("{%s.%u},", netfs->name, netfs->version); klen = strlen(netfs->name); if (klen > bufmax) return 0; memcpy(buffer, netfs->name, klen); return klen; } /* * get the auxiliary data for an FSDEF index record - this is the index * structure version number of the netfs for which this version is created */ static uint16_t fscache_fsdef_netfs_get_aux(const void *cookie_netfs_data, void *buffer, uint16_t bufmax) { const struct fscache_netfs *netfs = cookie_netfs_data; unsigned dlen; _enter("{%s.%u},", netfs->name, netfs->version); dlen = sizeof(uint32_t); if (dlen > bufmax) return 0; memcpy(buffer, &netfs->version, dlen); return dlen; } /* * check that the index structure version number stored in the auxiliary data * matches the one the netfs gave us */ static enum fscache_checkaux fscache_fsdef_netfs_check_aux( void *cookie_netfs_data, const void *data, uint16_t datalen) { struct fscache_netfs *netfs = cookie_netfs_data; uint32_t version; _enter("{%s},,%hu", netfs->name, datalen); if (datalen != sizeof(version)) { _leave(" = OBSOLETE [dl=%d v=%zu]", datalen, sizeof(version)); return FSCACHE_CHECKAUX_OBSOLETE; } memcpy(&version, data, sizeof(version)); if (version != netfs->version) { _leave(" = OBSOLETE [ver=%x net=%x]", version, netfs->version); return FSCACHE_CHECKAUX_OBSOLETE; } _leave(" = OKAY"); return FSCACHE_CHECKAUX_OKAY; } ue='9'>9space:mode:
authorDavid S. Miller <davem@davemloft.net>2017-02-01 12:46:17 -0500
committerDavid S. Miller <davem@davemloft.net>2017-02-01 12:46:17 -0500
commit889711a03e0fba427fb85317900e93c74e3be02a (patch)
tree05af2eda6502a95cf11935cce1e9b25a1340e7ca /drivers/usb/c67x00/c67x00-hcd.h
parentff1176f6164f3d151ee64c05d3f7b6662a81b982 (diff)
parent7243a1af37a4dc9225004546d9d0756c529ad3ce (diff)
Merge tag 'wireless-drivers-next-for-davem-2017-02-01' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next
Kalle Valo says: ==================== wireless-drivers-next patches for 4.11 It's nice to see rt2x00 development has becoming active, for example adding support for a new chip version. Also wcn36xx has been converted to use the recently merged QCOM_SMD subsystem. Otherwise new features and fixes it lots of drivers. Major changes: iwlwifi * some more work in preparation for A000 family support * add support for radiotap timestamps * some work on our firmware debugging capabilities wcn36xx * convert to a proper QCOM_SMD driver (from the platform_driver interface) ath10k * VHT160 support * dump Copy Engine registers during firmware crash * search board file extension from SMBIOS wil6210 * add disable_ap_sme module parameter rt2x00 * support RT3352 with external PA * support for RT3352 with 20MHz crystal * add support for RT5350 WiSoC brcmfmac * add support for BCM43455 sdio device rtl8xxxu * add support for D-Link DWA-131 rev E1, TP-Link TL-WN822N v4 and others ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/usb/c67x00/c67x00-hcd.h')