From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- .../lustre/include/linux/libcfs/libcfs_private.h | 556 +++++++++++++++++++++ 1 file changed, 556 insertions(+) create mode 100644 kernel/drivers/staging/lustre/include/linux/libcfs/libcfs_private.h (limited to 'kernel/drivers/staging/lustre/include/linux/libcfs/libcfs_private.h') diff --git a/kernel/drivers/staging/lustre/include/linux/libcfs/libcfs_private.h b/kernel/drivers/staging/lustre/include/linux/libcfs/libcfs_private.h new file mode 100644 index 000000000..fef882530 --- /dev/null +++ b/kernel/drivers/staging/lustre/include/linux/libcfs/libcfs_private.h @@ -0,0 +1,556 @@ +/* + * GPL HEADER START + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 only, + * as published by the Free Software Foundation. + * + * This program 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 + * General Public License version 2 for more details (a copy is included + * in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU General Public License + * version 2 along with this program; If not, see + * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + * GPL HEADER END + */ +/* + * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + * + * Copyright (c) 2011, 2012, Intel Corporation. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + * + * libcfs/include/libcfs/libcfs_private.h + * + * Various defines for libcfs. + * + */ + +#ifndef __LIBCFS_PRIVATE_H__ +#define __LIBCFS_PRIVATE_H__ + +/* XXX this layering violation is for nidstrings */ +#include "../lnet/types.h" + +#ifndef DEBUG_SUBSYSTEM +# define DEBUG_SUBSYSTEM S_UNDEFINED +#endif + + +/* + * When this is on, LASSERT macro includes check for assignment used instead + * of equality check, but doesn't have unlikely(). Turn this on from time to + * time to make test-builds. This shouldn't be on for production release. + */ +#define LASSERT_CHECKED (0) + +#define LASSERTF(cond, fmt, ...) \ +do { \ + if (unlikely(!(cond))) { \ + LIBCFS_DEBUG_MSG_DATA_DECL(__msg_data, D_EMERG, NULL); \ + libcfs_debug_msg(&__msg_data, \ + "ASSERTION( %s ) failed: " fmt, #cond, \ + ## __VA_ARGS__); \ + lbug_with_loc(&__msg_data); \ + } \ +} while (0) + +#define LASSERT(cond) LASSERTF(cond, "\n") + +#ifdef CONFIG_LUSTRE_DEBUG_EXPENSIVE_CHECK +/** + * This is for more expensive checks that one doesn't want to be enabled all + * the time. LINVRNT() has to be explicitly enabled by + * CONFIG_LUSTRE_DEBUG_EXPENSIVE_CHECK option. + */ +# define LINVRNT(exp) LASSERT(exp) +#else +# define LINVRNT(exp) ((void)sizeof !!(exp)) +#endif + +#define KLASSERT(e) LASSERT(e) + +void lbug_with_loc(struct libcfs_debug_msg_data *)__attribute__((noreturn)); + +#define LBUG() \ +do { \ + LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_EMERG, NULL); \ + lbug_with_loc(&msgdata); \ +} while (0) + +extern atomic_t libcfs_kmemory; +/* + * Memory + */ + +# define libcfs_kmem_inc(ptr, size) \ +do { \ + atomic_add(size, &libcfs_kmemory); \ +} while (0) + +# define libcfs_kmem_dec(ptr, size) \ +do { \ + atomic_sub(size, &libcfs_kmemory); \ +} while (0) + +# define libcfs_kmem_read() \ + atomic_read(&libcfs_kmemory) + +#ifndef LIBCFS_VMALLOC_SIZE +#define LIBCFS_VMALLOC_SIZE (2 << PAGE_CACHE_SHIFT) /* 2 pages */ +#endif + +#define LIBCFS_ALLOC_PRE(size, mask) \ +do { \ + LASSERT(!in_interrupt() || \ + ((size) <= LIBCFS_VMALLOC_SIZE && \ + ((mask) & __GFP_WAIT) == 0)); \ +} while (0) + +#define LIBCFS_ALLOC_POST(ptr, size) \ +do { \ + if (unlikely((ptr) == NULL)) { \ + CERROR("LNET: out of memory at %s:%d (tried to alloc '" \ + #ptr "' = %d)\n", __FILE__, __LINE__, (int)(size)); \ + CERROR("LNET: %d total bytes allocated by lnet\n", \ + libcfs_kmem_read()); \ + } else { \ + memset((ptr), 0, (size)); \ + libcfs_kmem_inc((ptr), (size)); \ + CDEBUG(D_MALLOC, "alloc '" #ptr "': %d at %p (tot %d).\n", \ + (int)(size), (ptr), libcfs_kmem_read()); \ + } \ +} while (0) + +/** + * allocate memory with GFP flags @mask + */ +#define LIBCFS_ALLOC_GFP(ptr, size, mask) \ +do { \ + LIBCFS_ALLOC_PRE((size), (mask)); \ + (ptr) = (size) <= LIBCFS_VMALLOC_SIZE ? \ + kmalloc((size), (mask)) : vmalloc(size); \ + LIBCFS_ALLOC_POST((ptr), (size)); \ +} while (0) + +/** + * default allocator + */ +#define LIBCFS_ALLOC(ptr, size) \ + LIBCFS_ALLOC_GFP(ptr, size, GFP_NOFS) + +/** + * non-sleeping allocator + */ +#define LIBCFS_ALLOC_ATOMIC(ptr, size) \ + LIBCFS_ALLOC_GFP(ptr, size, GFP_ATOMIC) + +/** + * allocate memory for specified CPU partition + * \a cptab != NULL, \a cpt is CPU partition id of \a cptab + * \a cptab == NULL, \a cpt is HW NUMA node id + */ +#define LIBCFS_CPT_ALLOC_GFP(ptr, cptab, cpt, size, mask) \ +do { \ + LIBCFS_ALLOC_PRE((size), (mask)); \ + (ptr) = (size) <= LIBCFS_VMALLOC_SIZE ? \ + kmalloc_node((size), (mask), cfs_cpt_spread_node(cptab, cpt)) :\ + vmalloc_node(size, cfs_cpt_spread_node(cptab, cpt)); \ + LIBCFS_ALLOC_POST((ptr), (size)); \ +} while (0) + +/** default numa allocator */ +#define LIBCFS_CPT_ALLOC(ptr, cptab, cpt, size) \ + LIBCFS_CPT_ALLOC_GFP(ptr, cptab, cpt, size, GFP_NOFS) + +#define LIBCFS_FREE(ptr, size) \ +do { \ + int s = (size); \ + if (unlikely((ptr) == NULL)) { \ + CERROR("LIBCFS: free NULL '" #ptr "' (%d bytes) at " \ + "%s:%d\n", s, __FILE__, __LINE__); \ + break; \ + } \ + libcfs_kmem_dec((ptr), s); \ + CDEBUG(D_MALLOC, "kfreed '" #ptr "': %d at %p (tot %d).\n", \ + s, (ptr), libcfs_kmem_read()); \ + if (unlikely(s > LIBCFS_VMALLOC_SIZE)) \ + vfree(ptr); \ + else \ + kfree(ptr); \ +} while (0) + +/******************************************************************************/ + +/* htonl hack - either this, or compile with -O2. Stupid byteorder/generic.h */ +#if defined(__GNUC__) && (__GNUC__ >= 2) && !defined(__OPTIMIZE__) +#define ___htonl(x) __cpu_to_be32(x) +#define ___htons(x) __cpu_to_be16(x) +#define ___ntohl(x) __be32_to_cpu(x) +#define ___ntohs(x) __be16_to_cpu(x) +#define htonl(x) ___htonl(x) +#define ntohl(x) ___ntohl(x) +#define htons(x) ___htons(x) +#define ntohs(x) ___ntohs(x) +#endif + +void libcfs_run_upcall(char **argv); +void libcfs_run_lbug_upcall(struct libcfs_debug_msg_data *); +void libcfs_debug_dumplog(void); +int libcfs_debug_init(unsigned long bufsize); +int libcfs_debug_cleanup(void); +int libcfs_debug_clear_buffer(void); +int libcfs_debug_mark_buffer(const char *text); + +void libcfs_debug_set_level(unsigned int debug_level); + +/* + * allocate per-cpu-partition data, returned value is an array of pointers, + * variable can be indexed by CPU ID. + * cptable != NULL: size of array is number of CPU partitions + * cptable == NULL: size of array is number of HW cores + */ +void *cfs_percpt_alloc(struct cfs_cpt_table *cptab, unsigned int size); +/* + * destroy per-cpu-partition variable + */ +void cfs_percpt_free(void *vars); +int cfs_percpt_number(void *vars); +void *cfs_percpt_current(void *vars); +void *cfs_percpt_index(void *vars, int idx); + +#define cfs_percpt_for_each(var, i, vars) \ + for (i = 0; i < cfs_percpt_number(vars) && \ + ((var) = (vars)[i]) != NULL; i++) + +/* + * allocate a variable array, returned value is an array of pointers. + * Caller can specify length of array by count. + */ +void *cfs_array_alloc(int count, unsigned int size); +void cfs_array_free(void *vars); + +#define LASSERT_ATOMIC_ENABLED (1) + +#if LASSERT_ATOMIC_ENABLED + +/** assert value of @a is equal to @v */ +#define LASSERT_ATOMIC_EQ(a, v) \ +do { \ + LASSERTF(atomic_read(a) == v, \ + "value: %d\n", atomic_read((a))); \ +} while (0) + +/** assert value of @a is unequal to @v */ +#define LASSERT_ATOMIC_NE(a, v) \ +do { \ + LASSERTF(atomic_read(a) != v, \ + "value: %d\n", atomic_read((a))); \ +} while (0) + +/** assert value of @a is little than @v */ +#define LASSERT_ATOMIC_LT(a, v) \ +do { \ + LASSERTF(atomic_read(a) < v, \ + "value: %d\n", atomic_read((a))); \ +} while (0) + +/** assert value of @a is little/equal to @v */ +#define LASSERT_ATOMIC_LE(a, v) \ +do { \ + LASSERTF(atomic_read(a) <= v, \ + "value: %d\n", atomic_read((a))); \ +} while (0) + +/** assert value of @a is great than @v */ +#define LASSERT_ATOMIC_GT(a, v) \ +do { \ + LASSERTF(atomic_read(a) > v, \ + "value: %d\n", atomic_read((a))); \ +} while (0) + +/** assert value of @a is great/equal to @v */ +#define LASSERT_ATOMIC_GE(a, v) \ +do { \ + LASSERTF(atomic_read(a) >= v, \ + "value: %d\n", atomic_read((a))); \ +} while (0) + +/** assert value of @a is great than @v1 and little than @v2 */ +#define LASSERT_ATOMIC_GT_LT(a, v1, v2) \ +do { \ + int __v = atomic_read(a); \ + LASSERTF(__v > v1 && __v < v2, "value: %d\n", __v); \ +} while (0) + +/** assert value of @a is great than @v1 and little/equal to @v2 */ +#define LASSERT_ATOMIC_GT_LE(a, v1, v2) \ +do { \ + int __v = atomic_read(a); \ + LASSERTF(__v > v1 && __v <= v2, "value: %d\n", __v); \ +} while (0) + +/** assert value of @a is great/equal to @v1 and little than @v2 */ +#define LASSERT_ATOMIC_GE_LT(a, v1, v2) \ +do { \ + int __v = atomic_read(a); \ + LASSERTF(__v >= v1 && __v < v2, "value: %d\n", __v); \ +} while (0) + +/** assert value of @a is great/equal to @v1 and little/equal to @v2 */ +#define LASSERT_ATOMIC_GE_LE(a, v1, v2) \ +do { \ + int __v = atomic_read(a); \ + LASSERTF(__v >= v1 && __v <= v2, "value: %d\n", __v); \ +} while (0) + +#else /* !LASSERT_ATOMIC_ENABLED */ + +#define LASSERT_ATOMIC_EQ(a, v) do {} while (0) +#define LASSERT_ATOMIC_NE(a, v) do {} while (0) +#define LASSERT_ATOMIC_LT(a, v) do {} while (0) +#define LASSERT_ATOMIC_LE(a, v) do {} while (0) +#define LASSERT_ATOMIC_GT(a, v) do {} while (0) +#define LASSERT_ATOMIC_GE(a, v) do {} while (0) +#define LASSERT_ATOMIC_GT_LT(a, v1, v2) do {} while (0) +#define LASSERT_ATOMIC_GT_LE(a, v1, v2) do {} while (0) +#define LASSERT_ATOMIC_GE_LT(a, v1, v2) do {} while (0) +#define LASSERT_ATOMIC_GE_LE(a, v1, v2) do {} while (0) + +#endif /* LASSERT_ATOMIC_ENABLED */ + +#define LASSERT_ATOMIC_ZERO(a) LASSERT_ATOMIC_EQ(a, 0) +#define LASSERT_ATOMIC_POS(a) LASSERT_ATOMIC_GT(a, 0) + +#define CFS_ALLOC_PTR(ptr) LIBCFS_ALLOC(ptr, sizeof(*(ptr))) +#define CFS_FREE_PTR(ptr) LIBCFS_FREE(ptr, sizeof(*(ptr))) + +/* + * percpu partition lock + * + * There are some use-cases like this in Lustre: + * . each CPU partition has it's own private data which is frequently changed, + * and mostly by the local CPU partition. + * . all CPU partitions share some global data, these data are rarely changed. + * + * LNet is typical example. + * CPU partition lock is designed for this kind of use-cases: + * . each CPU partition has it's own private lock + * . change on private data just needs to take the private lock + * . read on shared data just needs to take _any_ of private locks + * . change on shared data needs to take _all_ private locks, + * which is slow and should be really rare. + */ + +enum { + CFS_PERCPT_LOCK_EX = -1, /* negative */ +}; + +struct cfs_percpt_lock { + /* cpu-partition-table for this lock */ + struct cfs_cpt_table *pcl_cptab; + /* exclusively locked */ + unsigned int pcl_locked; + /* private lock table */ + spinlock_t **pcl_locks; +}; + +/* return number of private locks */ +static inline int +cfs_percpt_lock_num(struct cfs_percpt_lock *pcl) +{ + return cfs_cpt_number(pcl->pcl_cptab); +} + +/* + * create a cpu-partition lock based on CPU partition table \a cptab, + * each private lock has extra \a psize bytes padding data + */ +struct cfs_percpt_lock *cfs_percpt_lock_alloc(struct cfs_cpt_table *cptab); +/* destroy a cpu-partition lock */ +void cfs_percpt_lock_free(struct cfs_percpt_lock *pcl); + +/* lock private lock \a index of \a pcl */ +void cfs_percpt_lock(struct cfs_percpt_lock *pcl, int index); +/* unlock private lock \a index of \a pcl */ +void cfs_percpt_unlock(struct cfs_percpt_lock *pcl, int index); +/* create percpt (atomic) refcount based on @cptab */ +atomic_t **cfs_percpt_atomic_alloc(struct cfs_cpt_table *cptab, int val); +/* destroy percpt refcount */ +void cfs_percpt_atomic_free(atomic_t **refs); +/* return sum of all percpu refs */ +int cfs_percpt_atomic_summary(atomic_t **refs); + +/** Compile-time assertion. + + * Check an invariant described by a constant expression at compile time by + * forcing a compiler error if it does not hold. \a cond must be a constant + * expression as defined by the ISO C Standard: + * + * 6.8.4.2 The switch statement + * .... + * [#3] The expression of each case label shall be an integer + * constant expression and no two of the case constant + * expressions in the same switch statement shall have the same + * value after conversion... + * + */ +#define CLASSERT(cond) do {switch (42) {case (cond): case 0: break; } } while (0) + +/* support decl needed both by kernel and liblustre */ +int libcfs_isknown_lnd(int type); +char *libcfs_lnd2modname(int type); +char *libcfs_lnd2str(int type); +int libcfs_str2lnd(const char *str); +char *libcfs_net2str(__u32 net); +char *libcfs_nid2str(lnet_nid_t nid); +__u32 libcfs_str2net(const char *str); +lnet_nid_t libcfs_str2nid(const char *str); +int libcfs_str2anynid(lnet_nid_t *nid, const char *str); +char *libcfs_id2str(lnet_process_id_t id); +void cfs_free_nidlist(struct list_head *list); +int cfs_parse_nidlist(char *str, int len, struct list_head *list); +int cfs_match_nid(lnet_nid_t nid, struct list_head *list); + +/** \addtogroup lnet_addr + * @{ */ +/* how an LNET NID encodes net:address */ +/** extract the address part of an lnet_nid_t */ +#define LNET_NIDADDR(nid) ((__u32)((nid) & 0xffffffff)) +/** extract the network part of an lnet_nid_t */ +#define LNET_NIDNET(nid) ((__u32)(((nid) >> 32)) & 0xffffffff) +/** make an lnet_nid_t from a network part and an address part */ +#define LNET_MKNID(net, addr) ((((__u64)(net))<<32)|((__u64)(addr))) +/* how net encodes type:number */ +#define LNET_NETNUM(net) ((net) & 0xffff) +#define LNET_NETTYP(net) (((net) >> 16) & 0xffff) +#define LNET_MKNET(typ, num) ((((__u32)(typ))<<16)|((__u32)(num))) +/** @} lnet_addr */ + +/* max value for numeric network address */ +#define MAX_NUMERIC_VALUE 0xffffffff + +/* implication */ +#define ergo(a, b) (!(a) || (b)) +/* logical equivalence */ +#define equi(a, b) (!!(a) == !!(b)) + +/* -------------------------------------------------------------------- + * Light-weight trace + * Support for temporary event tracing with minimal Heisenberg effect. + * -------------------------------------------------------------------- */ + +struct libcfs_device_userstate { + int ldu_memhog_pages; + struct page *ldu_memhog_root_page; +}; + +#define MKSTR(ptr) ((ptr)) ? (ptr) : "" + +static inline int cfs_size_round4(int val) +{ + return (val + 3) & (~0x3); +} + +#ifndef HAVE_CFS_SIZE_ROUND +static inline int cfs_size_round(int val) +{ + return (val + 7) & (~0x7); +} + +#define HAVE_CFS_SIZE_ROUND +#endif + +static inline int cfs_size_round16(int val) +{ + return (val + 0xf) & (~0xf); +} + +static inline int cfs_size_round32(int val) +{ + return (val + 0x1f) & (~0x1f); +} + +static inline int cfs_size_round0(int val) +{ + if (!val) + return 0; + return (val + 1 + 7) & (~0x7); +} + +static inline size_t cfs_round_strlen(char *fset) +{ + return (size_t)cfs_size_round((int)strlen(fset) + 1); +} + +/* roundup \a val to power2 */ +static inline unsigned int cfs_power2_roundup(unsigned int val) +{ + if (val != LOWEST_BIT_SET(val)) { /* not a power of 2 already */ + do { + val &= ~LOWEST_BIT_SET(val); + } while (val != LOWEST_BIT_SET(val)); + /* ...and round up */ + val <<= 1; + } + return val; +} + +#define LOGL(var, len, ptr) \ +do { \ + if (var) \ + memcpy((char *)ptr, (const char *)var, len); \ + ptr += cfs_size_round(len); \ +} while (0) + +#define LOGU(var, len, ptr) \ +do { \ + if (var) \ + memcpy((char *)var, (const char *)ptr, len); \ + ptr += cfs_size_round(len); \ +} while (0) + +#define LOGL0(var, len, ptr) \ +do { \ + if (!len) \ + break; \ + memcpy((char *)ptr, (const char *)var, len); \ + *((char *)(ptr) + len) = 0; \ + ptr += cfs_size_round(len + 1); \ +} while (0) + +/** + * Lustre Network Driver types. + */ +enum { + /* Only add to these values (i.e. don't ever change or redefine them): + * network addresses depend on them... */ + QSWLND = 1, + SOCKLND = 2, + GMLND = 3, /* obsolete, keep it so that libcfs_nid2str works */ + PTLLND = 4, + O2IBLND = 5, + CIBLND = 6, + OPENIBLND = 7, + IIBLND = 8, + LOLND = 9, + RALND = 10, + VIBLND = 11, + MXLND = 12, + GNILND = 13, +}; + +#endif -- cgit 1.2.3-korg