#ifndef __PERF_HEADER_H #define __PERF_HEADER_H #include #include #include #include #include #include "event.h" #include "env.h" enum { HEADER_RESERVED = 0, /* always cleared */ HEADER_FIRST_FEATURE = 1, HEADER_TRACING_DATA = 1, HEADER_BUILD_ID, HEADER_HOSTNAME, HEADER_OSRELEASE, HEADER_VERSION, HEADER_ARCH, HEADER_NRCPUS, HEADER_CPUDESC, HEADER_CPUID, HEADER_TOTAL_MEM, HEADER_CMDLINE, HEADER_EVENT_DESC, HEADER_CPU_TOPOLOGY, HEADER_NUMA_TOPOLOGY, HEADER_BRANCH_STACK, HEADER_PMU_MAPPINGS, HEADER_GROUP_DESC, HEADER_AUXTRACE, HEADER_STAT, HEADER_CACHE, HEADER_LAST_FEATURE, HEADER_FEAT_BITS = 256, }; enum perf_header_version { PERF_HEADER_VERSION_1, PERF_HEADER_VERSION_2, }; struct perf_file_section { u64 offset; u64 size; }; struct perf_file_header { u64 magic; u64 size; u64 attr_size; struct perf_file_section attrs; struct perf_file_section data; /* event_types is ignored */ struct perf_file_section event_types; DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS); }; struct perf_pipe_file_header { u64 magic; u64 size; }; struct perf_header; int perf_file_header__read(struct perf_file_header *header, struct perf_header *ph, int fd); struct perf_header { enum perf_header_version version; bool needs_swap; u64 data_offset; u64 data_size; u64 feat_offset; DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS); struct perf_env env; }; struct perf_evlist; struct perf_session; int perf_session__read_header(struct perf_session *session); int perf_session__write_header(struct perf_session *session, struct perf_evlist *evlist, int fd, bool at_exit); int perf_header__write_pipe(int fd); void perf_header__set_feat(struct perf_header *header, int feat); void perf_header__clear_feat(struct perf_header *header, int feat); bool perf_header__has_feat(const struct perf_header *header, int feat); int perf_header__set_cmdline(int argc, const char **argv); int perf_header__process_sections(struct perf_header *header, int fd, void *data, int (*process)(struct perf_file_section *section, struct perf_header *ph, int feat, int fd, void *data)); int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full); int perf_event__synthesize_attr(struct perf_tool *tool, struct perf_event_attr *attr, u32 ids, u64 *id, perf_event__handler_t process); int perf_event__synthesize_attrs(struct perf_tool *tool, struct perf_session *session, perf_event__handler_t process); int perf_event__synthesize_event_update_unit(struct perf_tool *tool, struct perf_evsel *evsel, perf_event__handler_t process); int perf_event__synthesize_event_update_scale(struct perf_tool *tool, struct perf_evsel *evsel, perf_event__handler_t process); int perf_event__synthesize_event_update_name(struct perf_tool *tool, struct perf_evsel *evsel, perf_event__handler_t process); int perf_event__synthesize_event_update_cpus(struct perf_tool *tool, struct perf_evsel *evsel, perf_event__handler_t process); int perf_event__process_attr(struct perf_tool *tool, union perf_event *event, struct perf_evlist **pevlist); int perf_event__process_event_update(struct perf_tool *tool, union perf_event *event, struct perf_evlist **pevlist); size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp); int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, struct perf_evlist *evlist, perf_event__handler_t process); int perf_event__process_tracing_data(struct perf_tool *tool, union perf_event *event, struct perf_session *session); int perf_event__synthesize_build_id(struct perf_tool *tool, struct dso *pos, u16 misc, perf_event__handler_t process, struct machine *machine); int perf_event__process_build_id(struct perf_tool *tool, union perf_event *event, struct perf_session *session); bool is_perf_magic(u64 magic); #define NAME_ALIGN 64 int write_padded(int fd, const void *bf, size_t count, size_t count_aligned); /* * arch specific callback */ int get_cpuid(char *buffer, size_t sz); char *get_cpuid_str(void); #endif /* __PERF_HEADER_H */ rl'>
authorDavid S. Miller <davem@davemloft.net>2017-01-30 14:28:22 -0800
committerDavid S. Miller <davem@davemloft.net>2017-01-30 14:28:22 -0800
commit54791b276b4000b307339f269d3bf7db877d536f (patch)
tree1c2616bd373ce5ea28aac2a53e32f5b5834901ce /net/ipv4/raw_diag.c
parent5d0e7705774dd412a465896d08d59a81a345c1e4 (diff)
parent047487241ff59374fded8c477f21453681f5995c (diff)
Merge branch 'sparc64-non-resumable-user-error-recovery'
Liam R. Howlett says: ==================== sparc64: Recover from userspace non-resumable PIO & MEM errors A non-resumable error from userspace is able to cause a kernel panic or trap loop due to the setup and handling of the queued traps once in the kernel. This patch series addresses both of these issues. The queues are fixed by simply zeroing the memory before use. PIO errors from userspace will result in a SIGBUS being sent to the user process. The MEM errors form userspace will result in a SIGKILL and also cause the offending pages to be claimed so they are no longer used in future tasks. SIGKILL is used to ensure that the process does not try to coredump and result in an attempt to read the memory again from within kernel space. Although there is a HV call to scrub the memory (mem_scrub), there is no easy way to guarantee that the real memory address(es) are not used by other tasks. Clearing the error with mem_scrub would zero the memory and cause the other processes to proceed with bad data. The handling of other non-resumable errors remain unchanged and will cause a panic. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/raw_diag.c')