Message ID | 20190826111024.19053-3-chrubis@suse.cz |
---|---|
State | Superseded |
Headers | show |
Series | Basic eBPF tests | expand |
----- Original Message ----- > + > +static const struct map_type map_types[] = { > + {BPF_MAP_TYPE_HASH, "hash", 8, &key8}, > + {BPF_MAP_TYPE_ARRAY, "array", 4, &key4} > +}; > + > +void run(unsigned int n) > +{ > + int fd, i; > + void *key = *map_types[n].key; > + > + memset(attr, 0, sizeof(*attr)); > + attr->map_type = map_types[n].id; > + attr->key_size = map_types[n].key_size; > + attr->value_size = VAL_SZ; > + attr->max_entries = 1; > + > + TEST(bpf(BPF_MAP_CREATE, attr, sizeof(*attr))); > + if (TST_RET == -1) { > + if (TST_ERR == EPERM) { > + tst_brk(TCONF | TTERRNO, > + "bpf() requires CAP_SYS_ADMIN on this system"); > + } else { > + tst_res(TFAIL | TTERRNO, "Failed to create %s map", > + map_types[n].name); > + return; > + } > + } > + tst_res(TPASS, "Created %s map", map_types[n].name); > + fd = TST_RET; > + > + memset(attr, 0, sizeof(*attr)); > + attr->map_fd = fd; > + attr->key = ptr_to_u64(key); > + attr->value = ptr_to_u64(val_get); > + > + TEST(bpf(BPF_MAP_LOOKUP_ELEM, attr, sizeof(*attr))); > + > + switch (n) { Small nit (maybe personal preference), I'd rather make this check for map_types.attr, as opposed to test number / some position in array. > + case 0: > + if (TST_RET != -1 || TST_ERR != ENOENT) { > + tst_res(TFAIL | TTERRNO, > + "Empty hash map lookup should fail with ENOENT"); > + } else { > + tst_res(TPASS | TTERRNO, "Empty hash map lookup"); > + } > + break; > + case 1: > + if (TST_RET != -1) { > + for (i = 0;;) { > + if (val_get[i] != 0) { > + tst_res(TFAIL, > + "Preallocated array map val not zero"); If we hit this TFAIL, will the loop terminate? > + } else if (++i >= VAL_SZ) { > + tst_res(TPASS, > + "Preallocated array map lookup"); > + break; > + } > + } > + } else { > + tst_res(TFAIL | TERRNO, "Prellocated array map lookup"); > + } > + break; > + } > + > + memset(attr, 0, sizeof(*attr)); > + attr->map_fd = fd; > + attr->key = ptr_to_u64(key); > + attr->value = ptr_to_u64(val_set); > + attr->flags = BPF_ANY; > + > + TEST(bpf(BPF_MAP_UPDATE_ELEM, attr, sizeof(*attr))); > + if (TST_RET == -1) { > + tst_brk(TFAIL | TTERRNO, > + "Update %s map element", > + map_types[n].name); > + } else { > + tst_res(TPASS, > + "Update %s map element", > + map_types[n].name); > + } > + > + memset(attr, 0, sizeof(*attr)); > + attr->map_fd = fd; > + attr->key = ptr_to_u64(key); > + attr->value = ptr_to_u64(val_get); > + > + TEST(bpf(BPF_MAP_LOOKUP_ELEM, attr, sizeof(*attr))); > + if (TST_RET == -1) { > + tst_res(TFAIL | TTERRNO, > + "%s map lookup missing", > + map_types[n].name); > + } else if (memcmp(val_set, val_get, (size_t) VAL_SZ)) { > + tst_res(TFAIL, > + "%s map lookup returned different value", > + map_types[n].name); > + } else { > + tst_res(TPASS, "%s map lookup", map_types[n].name); > + } > + > + SAFE_CLOSE(fd); > +} > + > +static void setup(void) > +{ > + unsigned int i; > + > + memcpy(key8, "12345678", 8); > + memset(key4, 0, 4); > + > + for (i = 0; i < VAL_SZ; i++) > + val_set[i] = i % 256; > +} > + > +static struct tst_test test = { > + .tcnt = 2, Nit, ARRAY_SIZE(map_types) ? > + .test = run, > + .setup = setup, > + .min_kver = "3.18", > + .bufs = (struct tst_buffers []) { > + {&key4, .size = 4}, > + {&key8, .size = 8}, > + {&val_set, .size = VAL_SZ}, > + {&val_get, .size = VAL_SZ}, > + {&attr, .size = sizeof(*attr)}, > + {}, > + }, > +}; > -- > 2.21.0 > > > -- > Mailing list info: https://lists.linux.it/listinfo/ltp >
Hi! > Small nit (maybe personal preference), I'd rather make this check for > map_types.attr, as opposed to test number / some position in array. Sounds good. > > + case 0: > > + if (TST_RET != -1 || TST_ERR != ENOENT) { > > + tst_res(TFAIL | TTERRNO, > > + "Empty hash map lookup should fail with ENOENT"); > > + } else { > > + tst_res(TPASS | TTERRNO, "Empty hash map lookup"); > > + } > > + break; > > + case 1: > > + if (TST_RET != -1) { > > + for (i = 0;;) { > > + if (val_get[i] != 0) { > > + tst_res(TFAIL, > > + "Preallocated array map val not zero"); > > If we hit this TFAIL, will the loop terminate? My bad, I will change this to use proper for() loop.
diff --git a/runtest/syscalls b/runtest/syscalls index c41ba2a0d..6ddfc2178 100644 --- a/runtest/syscalls +++ b/runtest/syscalls @@ -32,6 +32,8 @@ bind01 bind01 bind02 bind02 bind03 bind03 +bpf_map01 bpf_map01 + brk01 brk01 capget01 capget01 diff --git a/testcases/kernel/syscalls/bpf/.gitignore b/testcases/kernel/syscalls/bpf/.gitignore new file mode 100644 index 000000000..f33532484 --- /dev/null +++ b/testcases/kernel/syscalls/bpf/.gitignore @@ -0,0 +1 @@ +bpf_map01 diff --git a/testcases/kernel/syscalls/bpf/Makefile b/testcases/kernel/syscalls/bpf/Makefile new file mode 100644 index 000000000..990c8c83c --- /dev/null +++ b/testcases/kernel/syscalls/bpf/Makefile @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: GPL-2.0-or-later +# Copyright (c) 2019 Linux Test Project + +top_srcdir ?= ../../../.. + +include $(top_srcdir)/include/mk/testcases.mk + +CFLAGS += -D_GNU_SOURCE + +include $(top_srcdir)/include/mk/generic_leaf_target.mk diff --git a/testcases/kernel/syscalls/bpf/bpf_map01.c b/testcases/kernel/syscalls/bpf/bpf_map01.c new file mode 100644 index 000000000..597a98417 --- /dev/null +++ b/testcases/kernel/syscalls/bpf/bpf_map01.c @@ -0,0 +1,158 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2019 Richard Palethorpe <rpalethorpe@suse.com> + * + * Trivial Extended Berkeley Packet Filter (eBPF) test. + * + * Sanity check creating and updating maps. + */ + +#include <limits.h> +#include <string.h> + +#include "config.h" +#include "tst_test.h" +#include "lapi/bpf.h" + +#define VAL_SZ 1024 + +static void *key4; +static void *key8; +static char *val_set; +static char *val_get; +static union bpf_attr *attr; + +struct map_type { + uint32_t id; + char *name; + int key_size; + void **key; +}; + +static const struct map_type map_types[] = { + {BPF_MAP_TYPE_HASH, "hash", 8, &key8}, + {BPF_MAP_TYPE_ARRAY, "array", 4, &key4} +}; + +void run(unsigned int n) +{ + int fd, i; + void *key = *map_types[n].key; + + memset(attr, 0, sizeof(*attr)); + attr->map_type = map_types[n].id; + attr->key_size = map_types[n].key_size; + attr->value_size = VAL_SZ; + attr->max_entries = 1; + + TEST(bpf(BPF_MAP_CREATE, attr, sizeof(*attr))); + if (TST_RET == -1) { + if (TST_ERR == EPERM) { + tst_brk(TCONF | TTERRNO, + "bpf() requires CAP_SYS_ADMIN on this system"); + } else { + tst_res(TFAIL | TTERRNO, "Failed to create %s map", + map_types[n].name); + return; + } + } + tst_res(TPASS, "Created %s map", map_types[n].name); + fd = TST_RET; + + memset(attr, 0, sizeof(*attr)); + attr->map_fd = fd; + attr->key = ptr_to_u64(key); + attr->value = ptr_to_u64(val_get); + + TEST(bpf(BPF_MAP_LOOKUP_ELEM, attr, sizeof(*attr))); + + switch (n) { + case 0: + if (TST_RET != -1 || TST_ERR != ENOENT) { + tst_res(TFAIL | TTERRNO, + "Empty hash map lookup should fail with ENOENT"); + } else { + tst_res(TPASS | TTERRNO, "Empty hash map lookup"); + } + break; + case 1: + if (TST_RET != -1) { + for (i = 0;;) { + if (val_get[i] != 0) { + tst_res(TFAIL, + "Preallocated array map val not zero"); + } else if (++i >= VAL_SZ) { + tst_res(TPASS, + "Preallocated array map lookup"); + break; + } + } + } else { + tst_res(TFAIL | TERRNO, "Prellocated array map lookup"); + } + break; + } + + memset(attr, 0, sizeof(*attr)); + attr->map_fd = fd; + attr->key = ptr_to_u64(key); + attr->value = ptr_to_u64(val_set); + attr->flags = BPF_ANY; + + TEST(bpf(BPF_MAP_UPDATE_ELEM, attr, sizeof(*attr))); + if (TST_RET == -1) { + tst_brk(TFAIL | TTERRNO, + "Update %s map element", + map_types[n].name); + } else { + tst_res(TPASS, + "Update %s map element", + map_types[n].name); + } + + memset(attr, 0, sizeof(*attr)); + attr->map_fd = fd; + attr->key = ptr_to_u64(key); + attr->value = ptr_to_u64(val_get); + + TEST(bpf(BPF_MAP_LOOKUP_ELEM, attr, sizeof(*attr))); + if (TST_RET == -1) { + tst_res(TFAIL | TTERRNO, + "%s map lookup missing", + map_types[n].name); + } else if (memcmp(val_set, val_get, (size_t) VAL_SZ)) { + tst_res(TFAIL, + "%s map lookup returned different value", + map_types[n].name); + } else { + tst_res(TPASS, "%s map lookup", map_types[n].name); + } + + SAFE_CLOSE(fd); +} + +static void setup(void) +{ + unsigned int i; + + memcpy(key8, "12345678", 8); + memset(key4, 0, 4); + + for (i = 0; i < VAL_SZ; i++) + val_set[i] = i % 256; +} + +static struct tst_test test = { + .tcnt = 2, + .test = run, + .setup = setup, + .min_kver = "3.18", + .bufs = (struct tst_buffers []) { + {&key4, .size = 4}, + {&key8, .size = 8}, + {&val_set, .size = VAL_SZ}, + {&val_get, .size = VAL_SZ}, + {&attr, .size = sizeof(*attr)}, + {}, + }, +};