cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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drbd_limits.h (8003B)


      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3  drbd_limits.h
      4  This file is part of DRBD by Philipp Reisner and Lars Ellenberg.
      5*/
      6
      7/*
      8 * Our current limitations.
      9 * Some of them are hard limits,
     10 * some of them are arbitrary range limits, that make it easier to provide
     11 * feedback about nonsense settings for certain configurable values.
     12 */
     13
     14#ifndef DRBD_LIMITS_H
     15#define DRBD_LIMITS_H 1
     16
     17#define DEBUG_RANGE_CHECK 0
     18
     19#define DRBD_MINOR_COUNT_MIN 1
     20#define DRBD_MINOR_COUNT_MAX 255
     21#define DRBD_MINOR_COUNT_DEF 32
     22#define DRBD_MINOR_COUNT_SCALE '1'
     23
     24#define DRBD_VOLUME_MAX 65535
     25
     26#define DRBD_DIALOG_REFRESH_MIN 0
     27#define DRBD_DIALOG_REFRESH_MAX 600
     28#define DRBD_DIALOG_REFRESH_SCALE '1'
     29
     30/* valid port number */
     31#define DRBD_PORT_MIN 1
     32#define DRBD_PORT_MAX 0xffff
     33#define DRBD_PORT_SCALE '1'
     34
     35/* startup { */
     36  /* if you want more than 3.4 days, disable */
     37#define DRBD_WFC_TIMEOUT_MIN 0
     38#define DRBD_WFC_TIMEOUT_MAX 300000
     39#define DRBD_WFC_TIMEOUT_DEF 0
     40#define DRBD_WFC_TIMEOUT_SCALE '1'
     41
     42#define DRBD_DEGR_WFC_TIMEOUT_MIN 0
     43#define DRBD_DEGR_WFC_TIMEOUT_MAX 300000
     44#define DRBD_DEGR_WFC_TIMEOUT_DEF 0
     45#define DRBD_DEGR_WFC_TIMEOUT_SCALE '1'
     46
     47#define DRBD_OUTDATED_WFC_TIMEOUT_MIN 0
     48#define DRBD_OUTDATED_WFC_TIMEOUT_MAX 300000
     49#define DRBD_OUTDATED_WFC_TIMEOUT_DEF 0
     50#define DRBD_OUTDATED_WFC_TIMEOUT_SCALE '1'
     51/* }*/
     52
     53/* net { */
     54  /* timeout, unit centi seconds
     55   * more than one minute timeout is not useful */
     56#define DRBD_TIMEOUT_MIN 1
     57#define DRBD_TIMEOUT_MAX 600
     58#define DRBD_TIMEOUT_DEF 60       /* 6 seconds */
     59#define DRBD_TIMEOUT_SCALE '1'
     60
     61 /* If backing disk takes longer than disk_timeout, mark the disk as failed */
     62#define DRBD_DISK_TIMEOUT_MIN 0    /* 0 = disabled */
     63#define DRBD_DISK_TIMEOUT_MAX 6000 /* 10 Minutes */
     64#define DRBD_DISK_TIMEOUT_DEF 0    /* disabled */
     65#define DRBD_DISK_TIMEOUT_SCALE '1'
     66
     67  /* active connection retries when C_WF_CONNECTION */
     68#define DRBD_CONNECT_INT_MIN 1
     69#define DRBD_CONNECT_INT_MAX 120
     70#define DRBD_CONNECT_INT_DEF 10   /* seconds */
     71#define DRBD_CONNECT_INT_SCALE '1'
     72
     73  /* keep-alive probes when idle */
     74#define DRBD_PING_INT_MIN 1
     75#define DRBD_PING_INT_MAX 120
     76#define DRBD_PING_INT_DEF 10
     77#define DRBD_PING_INT_SCALE '1'
     78
     79 /* timeout for the ping packets.*/
     80#define DRBD_PING_TIMEO_MIN  1
     81#define DRBD_PING_TIMEO_MAX  300
     82#define DRBD_PING_TIMEO_DEF  5
     83#define DRBD_PING_TIMEO_SCALE '1'
     84
     85  /* max number of write requests between write barriers */
     86#define DRBD_MAX_EPOCH_SIZE_MIN 1
     87#define DRBD_MAX_EPOCH_SIZE_MAX 20000
     88#define DRBD_MAX_EPOCH_SIZE_DEF 2048
     89#define DRBD_MAX_EPOCH_SIZE_SCALE '1'
     90
     91  /* I don't think that a tcp send buffer of more than 10M is useful */
     92#define DRBD_SNDBUF_SIZE_MIN  0
     93#define DRBD_SNDBUF_SIZE_MAX  (10<<20)
     94#define DRBD_SNDBUF_SIZE_DEF  0
     95#define DRBD_SNDBUF_SIZE_SCALE '1'
     96
     97#define DRBD_RCVBUF_SIZE_MIN  0
     98#define DRBD_RCVBUF_SIZE_MAX  (10<<20)
     99#define DRBD_RCVBUF_SIZE_DEF  0
    100#define DRBD_RCVBUF_SIZE_SCALE '1'
    101
    102  /* @4k PageSize -> 128kB - 512MB */
    103#define DRBD_MAX_BUFFERS_MIN  32
    104#define DRBD_MAX_BUFFERS_MAX  131072
    105#define DRBD_MAX_BUFFERS_DEF  2048
    106#define DRBD_MAX_BUFFERS_SCALE '1'
    107
    108  /* @4k PageSize -> 4kB - 512MB */
    109#define DRBD_UNPLUG_WATERMARK_MIN  1
    110#define DRBD_UNPLUG_WATERMARK_MAX  131072
    111#define DRBD_UNPLUG_WATERMARK_DEF (DRBD_MAX_BUFFERS_DEF/16)
    112#define DRBD_UNPLUG_WATERMARK_SCALE '1'
    113
    114  /* 0 is disabled.
    115   * 200 should be more than enough even for very short timeouts */
    116#define DRBD_KO_COUNT_MIN  0
    117#define DRBD_KO_COUNT_MAX  200
    118#define DRBD_KO_COUNT_DEF  7
    119#define DRBD_KO_COUNT_SCALE '1'
    120/* } */
    121
    122/* syncer { */
    123  /* FIXME allow rate to be zero? */
    124#define DRBD_RESYNC_RATE_MIN 1
    125/* channel bonding 10 GbE, or other hardware */
    126#define DRBD_RESYNC_RATE_MAX (4 << 20)
    127#define DRBD_RESYNC_RATE_DEF 250
    128#define DRBD_RESYNC_RATE_SCALE 'k'  /* kilobytes */
    129
    130#define DRBD_AL_EXTENTS_MIN  67
    131  /* we use u16 as "slot number", (u16)~0 is "FREE".
    132   * If you use >= 292 kB on-disk ring buffer,
    133   * this is the maximum you can use: */
    134#define DRBD_AL_EXTENTS_MAX  0xfffe
    135#define DRBD_AL_EXTENTS_DEF  1237
    136#define DRBD_AL_EXTENTS_SCALE '1'
    137
    138#define DRBD_MINOR_NUMBER_MIN  -1
    139#define DRBD_MINOR_NUMBER_MAX  ((1 << 20) - 1)
    140#define DRBD_MINOR_NUMBER_DEF  -1
    141#define DRBD_MINOR_NUMBER_SCALE '1'
    142
    143/* } */
    144
    145/* drbdsetup XY resize -d Z
    146 * you are free to reduce the device size to nothing, if you want to.
    147 * the upper limit with 64bit kernel, enough ram and flexible meta data
    148 * is 1 PiB, currently. */
    149/* DRBD_MAX_SECTORS */
    150#define DRBD_DISK_SIZE_MIN  0
    151#define DRBD_DISK_SIZE_MAX  (1 * (2LLU << 40))
    152#define DRBD_DISK_SIZE_DEF  0 /* = disabled = no user size... */
    153#define DRBD_DISK_SIZE_SCALE 's'  /* sectors */
    154
    155#define DRBD_ON_IO_ERROR_DEF EP_DETACH
    156#define DRBD_FENCING_DEF FP_DONT_CARE
    157#define DRBD_AFTER_SB_0P_DEF ASB_DISCONNECT
    158#define DRBD_AFTER_SB_1P_DEF ASB_DISCONNECT
    159#define DRBD_AFTER_SB_2P_DEF ASB_DISCONNECT
    160#define DRBD_RR_CONFLICT_DEF ASB_DISCONNECT
    161#define DRBD_ON_NO_DATA_DEF OND_IO_ERROR
    162#define DRBD_ON_CONGESTION_DEF OC_BLOCK
    163#define DRBD_READ_BALANCING_DEF RB_PREFER_LOCAL
    164
    165#define DRBD_MAX_BIO_BVECS_MIN 0
    166#define DRBD_MAX_BIO_BVECS_MAX 128
    167#define DRBD_MAX_BIO_BVECS_DEF 0
    168#define DRBD_MAX_BIO_BVECS_SCALE '1'
    169
    170#define DRBD_C_PLAN_AHEAD_MIN  0
    171#define DRBD_C_PLAN_AHEAD_MAX  300
    172#define DRBD_C_PLAN_AHEAD_DEF  20
    173#define DRBD_C_PLAN_AHEAD_SCALE '1'
    174
    175#define DRBD_C_DELAY_TARGET_MIN 1
    176#define DRBD_C_DELAY_TARGET_MAX 100
    177#define DRBD_C_DELAY_TARGET_DEF 10
    178#define DRBD_C_DELAY_TARGET_SCALE '1'
    179
    180#define DRBD_C_FILL_TARGET_MIN 0
    181#define DRBD_C_FILL_TARGET_MAX (1<<20) /* 500MByte in sec */
    182#define DRBD_C_FILL_TARGET_DEF 100 /* Try to place 50KiB in socket send buffer during resync */
    183#define DRBD_C_FILL_TARGET_SCALE 's'  /* sectors */
    184
    185#define DRBD_C_MAX_RATE_MIN     250
    186#define DRBD_C_MAX_RATE_MAX     (4 << 20)
    187#define DRBD_C_MAX_RATE_DEF     102400
    188#define DRBD_C_MAX_RATE_SCALE	'k'  /* kilobytes */
    189
    190#define DRBD_C_MIN_RATE_MIN     0
    191#define DRBD_C_MIN_RATE_MAX     (4 << 20)
    192#define DRBD_C_MIN_RATE_DEF     250
    193#define DRBD_C_MIN_RATE_SCALE	'k'  /* kilobytes */
    194
    195#define DRBD_CONG_FILL_MIN	0
    196#define DRBD_CONG_FILL_MAX	(10<<21) /* 10GByte in sectors */
    197#define DRBD_CONG_FILL_DEF	0
    198#define DRBD_CONG_FILL_SCALE	's'  /* sectors */
    199
    200#define DRBD_CONG_EXTENTS_MIN	DRBD_AL_EXTENTS_MIN
    201#define DRBD_CONG_EXTENTS_MAX	DRBD_AL_EXTENTS_MAX
    202#define DRBD_CONG_EXTENTS_DEF	DRBD_AL_EXTENTS_DEF
    203#define DRBD_CONG_EXTENTS_SCALE DRBD_AL_EXTENTS_SCALE
    204
    205#define DRBD_PROTOCOL_DEF DRBD_PROT_C
    206
    207#define DRBD_DISK_BARRIER_DEF	0
    208#define DRBD_DISK_FLUSHES_DEF	1
    209#define DRBD_DISK_DRAIN_DEF	1
    210#define DRBD_MD_FLUSHES_DEF	1
    211#define DRBD_TCP_CORK_DEF	1
    212#define DRBD_AL_UPDATES_DEF     1
    213
    214/* We used to ignore the discard_zeroes_data setting.
    215 * To not change established (and expected) behaviour,
    216 * by default assume that, for discard_zeroes_data=0,
    217 * we can make that an effective discard_zeroes_data=1,
    218 * if we only explicitly zero-out unaligned partial chunks. */
    219#define DRBD_DISCARD_ZEROES_IF_ALIGNED_DEF 1
    220
    221/* Some backends pretend to support WRITE SAME,
    222 * but fail such requests when they are actually submitted.
    223 * This is to tell DRBD to not even try. */
    224#define DRBD_DISABLE_WRITE_SAME_DEF 0
    225
    226#define DRBD_ALLOW_TWO_PRIMARIES_DEF	0
    227#define DRBD_ALWAYS_ASBP_DEF	0
    228#define DRBD_USE_RLE_DEF	1
    229#define DRBD_CSUMS_AFTER_CRASH_ONLY_DEF 0
    230
    231#define DRBD_AL_STRIPES_MIN     1
    232#define DRBD_AL_STRIPES_MAX     1024
    233#define DRBD_AL_STRIPES_DEF     1
    234#define DRBD_AL_STRIPES_SCALE   '1'
    235
    236#define DRBD_AL_STRIPE_SIZE_MIN   4
    237#define DRBD_AL_STRIPE_SIZE_MAX   16777216
    238#define DRBD_AL_STRIPE_SIZE_DEF   32
    239#define DRBD_AL_STRIPE_SIZE_SCALE 'k' /* kilobytes */
    240
    241#define DRBD_SOCKET_CHECK_TIMEO_MIN 0
    242#define DRBD_SOCKET_CHECK_TIMEO_MAX DRBD_PING_TIMEO_MAX
    243#define DRBD_SOCKET_CHECK_TIMEO_DEF 0
    244#define DRBD_SOCKET_CHECK_TIMEO_SCALE '1'
    245
    246#define DRBD_RS_DISCARD_GRANULARITY_MIN 0
    247#define DRBD_RS_DISCARD_GRANULARITY_MAX (1<<20)  /* 1MiByte */
    248#define DRBD_RS_DISCARD_GRANULARITY_DEF 0     /* disabled by default */
    249#define DRBD_RS_DISCARD_GRANULARITY_SCALE '1' /* bytes */
    250
    251#endif