| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | #ifndef NETDATA_EBPF_DISK_H |
| 4 | #define NETDATA_EBPF_DISK_H 1 |
| 5 | |
| 6 | // Module name & description |
| 7 | #define NETDATA_EBPF_MODULE_NAME_DISK "disk" |
| 8 | #define NETDATA_EBPF_DISK_MODULE_DESC "Monitor disk latency independent of filesystem." |
| 9 | |
| 10 | #include "libnetdata/avl/avl.h" |
| 11 | #include "libnetdata/libnetdata.h" |
| 12 | #include "libbpf_api/ebpf.h" |
| 13 | |
| 14 | #define NETDATA_EBPF_PROC_PARTITIONS "/proc/partitions" |
| 15 | |
| 16 | // Process configuration name |
| 17 | #define NETDATA_DISK_CONFIG_FILE "disk.conf" |
| 18 | |
| 19 | // Decode function extracted from: https://elixir.bootlin.com/linux/v5.10.8/source/include/linux/kdev_t.h#L7 |
| 20 | #define MINORBITS 20 |
| 21 | #define MKDEV(ma, mi) (((ma) << MINORBITS) | (mi)) |
| 22 | |
| 23 | enum netdata_latency_disks_flags { |
| 24 | NETDATA_DISK_NONE = 0, |
| 25 | NETDATA_DISK_ADDED_TO_PLOT_LIST = 1, |
| 26 | NETDATA_DISK_CHART_CREATED = 2, |
| 27 | NETDATA_DISK_IS_HERE = 4 |
| 28 | }; |
| 29 | |
| 30 | /* |
| 31 | * The definition (DISK_NAME_LEN) has been a stable value since Kernel 3.0, |
| 32 | * I decided to bring it as internal definition, to avoid include linux/genhd.h. |
| 33 | */ |
| 34 | #define NETDATA_DISK_NAME_LEN 32 |
| 35 | |
| 36 | typedef struct netdata_ebpf_disks { |
| 37 | uint64_t start; |
| 38 | uint64_t end; |
| 39 | |
| 40 | avl_t avl; |
| 41 | uint32_t dev; |
| 42 | uint32_t major; |
| 43 | uint32_t minor; |
| 44 | uint32_t bootsector_key; |
| 45 | uint32_t flags; |
| 46 | |
| 47 | time_t last_update; |
| 48 | |
| 49 | char family[NETDATA_DISK_NAME_LEN + 1]; |
| 50 | |
| 51 | struct netdata_ebpf_disks *next; |
| 52 | |
| 53 | netdata_ebpf_histogram_t histogram; |
| 54 | } netdata_ebpf_disks_t; |
| 55 | |
| 56 | static inline void ebpf_disks_init(netdata_ebpf_disks_t *d) |
| 57 | { |
| 58 | d->start = 0; |
| 59 | d->end = 0; |
| 60 | d->dev = 0; |
| 61 | d->major = 0; |
| 62 | d->minor = 0; |
| 63 | d->bootsector_key = 0; |
| 64 | d->flags = 0; |
| 65 | d->last_update = 0; |
| 66 | d->family[0] = '\0'; |
| 67 | d->next = NULL; |
| 68 | memset(&d->histogram, 0, sizeof(d->histogram)); |
| 69 | } |
| 70 | |
| 71 | static inline void ebpf_disks_cleanup(netdata_ebpf_disks_t *d) |
| 72 | { |
| 73 | freez(d->histogram.name); |
| 74 | freez(d->histogram.title); |
| 75 | freez(d->histogram.ctx); |
| 76 | } |
| 77 | |
| 78 | enum ebpf_disk_tables { NETDATA_DISK_IO }; |
| 79 | |
| 80 | typedef struct block_key { |
| 81 | uint32_t bin; |
| 82 | uint32_t dev; |
| 83 | } block_key_t; |
| 84 | |
| 85 | #define NETDATA_EBPF_DISK_LATENCY_CONTEXT "disk.latency_io" |
| 86 | |
| 87 | extern struct config disk_config; |
| 88 | |
| 89 | void ebpf_disk_thread(void *ptr); |
| 90 | |
| 91 | #endif /* NETDATA_EBPF_DISK_H */ |