projects / ust.git / blame
| Commit | Line | Data |
|---|---|---|
| 23e47a47 PMF |
1 | #ifndef UST_CHANNELS_H |
| 2 | #define UST_CHANNELS_H | |
| 99054cee PMF |
3 | |
| 4 | /* | |
| 5 | * Copyright (C) 2008 Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca) | |
| 6 | * | |
| 7 | * Dynamic tracer channel allocation. | |
| 8fc2d8db PMF |
8 | * |
| 9 | * This library is free software; you can redistribute it and/or | |
| 10 | * modify it under the terms of the GNU Lesser General Public | |
| 11 | * License as published by the Free Software Foundation; either | |
| 12 | * version 2.1 of the License, or (at your option) any later version. | |
| 13 | * | |
| 14 | * This library is distributed in the hope that it will be useful, | |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 17 | * Lesser General Public License for more details. | |
| 18 | * | |
| 19 | * You should have received a copy of the GNU Lesser General Public | |
| 20 | * License along with this library; if not, write to the Free Software | |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 99054cee PMF |
22 | */ |
| 23 | ||
| 24 | #include <linux/limits.h> | |
| b6bf28ec | 25 | #include <errno.h> |
| 59b161cd | 26 | |
| fbca6b62 | 27 | #include <ust/kernelcompat.h> |
| 99054cee PMF |
28 | |
| 29 | #define EVENTS_PER_CHANNEL 65536 | |
| 204141ee | 30 | #define MAX_CPUS 32 |
| 99054cee | 31 | |
| b73a4c47 | 32 | struct ust_trace; |
| 99054cee | 33 | |
| b5b073e2 PMF |
34 | struct ust_buffer; |
| 35 | ||
| 36 | struct ust_channel { | |
| 99054cee | 37 | /* First 32 bytes cache-hot cacheline */ |
| b73a4c47 | 38 | struct ust_trace *trace; |
| 204141ee PMF |
39 | int *buf_struct_shmids; |
| 40 | struct ust_buffer **buf; | |
| 99054cee PMF |
41 | int overwrite:1; |
| 42 | int active:1; | |
| 43 | unsigned int n_subbufs_order; | |
| 44 | unsigned long commit_count_mask; /* | |
| 45 | * Commit count mask, removing | |
| 46 | * the MSBs corresponding to | |
| 47 | * bits used to represent the | |
| 48 | * subbuffer index. | |
| 49 | */ | |
| 50 | /* End of first 32 bytes cacheline */ | |
| 51 | ||
| 99054cee | 52 | struct kref kref; /* Channel transport reference count */ |
| b5b073e2 PMF |
53 | size_t subbuf_size; |
| 54 | int subbuf_size_order; | |
| 99054cee PMF |
55 | unsigned int subbuf_cnt; |
| 56 | const char *channel_name; | |
| 204141ee | 57 | int n_cpus; |
| b5b073e2 PMF |
58 | |
| 59 | u32 version; | |
| 60 | size_t alloc_size; | |
| 61 | struct list_head list; | |
| 99054cee PMF |
62 | } ____cacheline_aligned; |
| 63 | ||
| 64 | struct ltt_channel_setting { | |
| 65 | unsigned int subbuf_size; | |
| 66 | unsigned int subbuf_cnt; | |
| 67 | struct kref kref; /* Number of references to structure content */ | |
| 68 | struct list_head list; | |
| 69 | unsigned int index; /* index of channel in trace channel array */ | |
| 70 | u16 free_event_id; /* Next event ID to allocate */ | |
| 71 | char name[PATH_MAX]; | |
| 72 | }; | |
| 73 | ||
| 064842c6 PMF |
74 | extern int ltt_channels_register(const char *name); |
| 75 | extern int ltt_channels_unregister(const char *name); | |
| 76 | extern int ltt_channels_set_default(const char *name, | |
| 99054cee PMF |
77 | unsigned int subbuf_size, |
| 78 | unsigned int subbuf_cnt); | |
| 064842c6 PMF |
79 | extern const char *ltt_channels_get_name_from_index(unsigned int index); |
| 80 | extern int ltt_channels_get_index_from_name(const char *name); | |
| b5b073e2 | 81 | extern struct ust_channel *ltt_channels_trace_alloc(unsigned int *nr_channels, |
| 99054cee PMF |
82 | int overwrite, |
| 83 | int active); | |
| b5b073e2 | 84 | extern void ltt_channels_trace_free(struct ust_channel *channels); |
| 064842c6 PMF |
85 | extern int _ltt_channels_get_event_id(const char *channel, const char *name); |
| 86 | extern int ltt_channels_get_event_id(const char *channel, const char *name); | |
| 99054cee | 87 | |
| 23e47a47 | 88 | #endif /* UST_CHANNELS_H */ |