summaryrefslogtreecommitdiffstats
path: root/bitbake/lib/bb/monitordisk.py
blob: 1a25b0041f8ff66d365e2bf5ac7fcb90915ee075 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
#
# Copyright (C) 2012 Robert Yang
#
# SPDX-License-Identifier: GPL-2.0-only
#

import os, logging, re, sys
import bb
logger = logging.getLogger("BitBake.Monitor")

def printErr(info):
    logger.error("%s\n       Disk space monitor will NOT be enabled" % info)

def convertGMK(unit):

    """ Convert the space unit G, M, K, the unit is case-insensitive """

    unitG = re.match(r'([1-9][0-9]*)[gG]\s?$', unit)
    if unitG:
        return int(unitG.group(1)) * (1024 ** 3)
    unitM = re.match(r'([1-9][0-9]*)[mM]\s?$', unit)
    if unitM:
        return int(unitM.group(1)) * (1024 ** 2)
    unitK = re.match(r'([1-9][0-9]*)[kK]\s?$', unit)
    if unitK:
        return int(unitK.group(1)) * 1024
    unitN = re.match(r'([1-9][0-9]*)\s?$', unit)
    if unitN:
        return int(unitN.group(1))
    else:
        return None

def getMountedDev(path):

    """ Get the device mounted at the path, uses /proc/mounts """

    # Get the mount point of the filesystem containing path
    # st_dev is the ID of device containing file
    parentDev = os.stat(path).st_dev
    currentDev = parentDev
    # When the current directory's device is different from the
    # parent's, then the current directory is a mount point
    while parentDev == currentDev:
        mountPoint = path
        # Use dirname to get the parent's directory
        path = os.path.dirname(path)
        # Reach the "/"
        if path == mountPoint:
            break
        parentDev= os.stat(path).st_dev

    try:
        with open("/proc/mounts", "r") as ifp:
            for line in ifp:
                procLines = line.rstrip('\n').split()
                if procLines[1] == mountPoint:
                    return procLines[0]
    except EnvironmentError:
        pass
    return None

def getDiskData(BBDirs, configuration):

    """Prepare disk data for disk space monitor"""

    # Save the device IDs, need the ID to be unique (the dictionary's key is
    # unique), so that when more than one directory is located on the same
    # device, we just monitor it once
    devDict = {}
    for pathSpaceInode in BBDirs.split():
        # The input format is: "dir,space,inode", dir is a must, space
        # and inode are optional
        pathSpaceInodeRe = re.match(r'([^,]*),([^,]*),([^,]*),?(.*)', pathSpaceInode)
        if not pathSpaceInodeRe:
            printErr("Invalid value in BB_DISKMON_DIRS: %s" % pathSpaceInode)
            return None

        action = pathSpaceInodeRe.group(1)
        if action not in ("ABORT", "STOPTASKS", "WARN"):
            printErr("Unknown disk space monitor action: %s" % action)
            return None

        path = os.path.realpath(pathSpaceInodeRe.group(2))
        if not path:
            printErr("Invalid path value in BB_DISKMON_DIRS: %s" % pathSpaceInode)
            return None

        # The disk space or inode is optional, but it should have a correct
        # value once it is specified
        minSpace = pathSpaceInodeRe.group(3)
        if minSpace:
            minSpace = convertGMK(minSpace)
            if not minSpace:
                printErr("Invalid disk space value in BB_DISKMON_DIRS: %s" % pathSpaceInodeRe.group(3))
                return None
        else:
            # None means that it is not specified
            minSpace = None

        minInode = pathSpaceInodeRe.group(4)
        if minInode:
            minInode = convertGMK(minInode)
            if not minInode:
                printErr("Invalid inode value in BB_DISKMON_DIRS: %s" % pathSpaceInodeRe.group(4))
                return None
        else:
            # None means that it is not specified
            minInode = None

        if minSpace is None and minInode is None:
            printErr("No disk space or inode value in found BB_DISKMON_DIRS: %s" % pathSpaceInode)
            return None
        # mkdir for the directory since it may not exist, for example the
        # DL_DIR may not exist at the very beginning
        if not os.path.exists(path):
            bb.utils.mkdirhier(path)
        dev = getMountedDev(path)
        # Use path/action as the key
        devDict[(path, action)] = [dev, minSpace, minInode]

    return devDict

def getInterval(configuration):

    """ Get the disk space interval """

    # The default value is 50M and 5K.
    spaceDefault = 50 * 1024 * 1024
    inodeDefault = 5 * 1024

    interval = configuration.getVar("BB_DISKMON_WARNINTERVAL")
    if not interval:
        return spaceDefault, inodeDefault
    else:
        # The disk space or inode interval is optional, but it should
        # have a correct value once it is specified
        intervalRe = re.match(r'([^,]*),?\s*(.*)', interval)
        if intervalRe:
            intervalSpace = intervalRe.group(1)
            if intervalSpace:
                intervalSpace = convertGMK(intervalSpace)
                if not intervalSpace:
                    printErr("Invalid disk space interval value in BB_DISKMON_WARNINTERVAL: %s" % intervalRe.group(1))
                    return None, None
            else:
                intervalSpace = spaceDefault
            intervalInode = intervalRe.group(2)
            if intervalInode:
                intervalInode = convertGMK(intervalInode)
                if not intervalInode:
                    printErr("Invalid disk inode interval value in BB_DISKMON_WARNINTERVAL: %s" % intervalRe.group(2))
                    return None, None
            else:
                intervalInode = inodeDefault
            return intervalSpace, intervalInode
        else:
            printErr("Invalid interval value in BB_DISKMON_WARNINTERVAL: %s" % interval)
            return None, None

class diskMonitor:

    """Prepare the disk space monitor data"""

    def __init__(self, configuration):

        self.enableMonitor = False
        self.configuration = configuration

        BBDirs = configuration.getVar("BB_DISKMON_DIRS") or None
        if BBDirs:
            self.devDict = getDiskData(BBDirs, configuration)
            if self.devDict:
                self.spaceInterval, self.inodeInterval = getInterval(configuration)
                if self.spaceInterval and self.inodeInterval:
                    self.enableMonitor = True
                    # These are for saving the previous disk free space and inode, we
                    # use them to avoid printing too many warning messages
                    self.preFreeS = {}
                    self.preFreeI = {}
                    # This is for STOPTASKS and ABORT, to avoid printing the message
                    # repeatedly while waiting for the tasks to finish
                    self.checked = {}
                    for k in self.devDict:
                        self.preFreeS[k] = 0
                        self.preFreeI[k] = 0
                        self.checked[k] = False
                    if self.spaceInterval is None and self.inodeInterval is None:
                        self.enableMonitor = False

    def check(self, rq):

        """ Take action for the monitor """

        if self.enableMonitor:
            diskUsage = {}
            for k, attributes in self.devDict.items():
                path, action = k
                dev, minSpace, minInode = attributes

                st = os.statvfs(path)

                # The available free space, integer number
                freeSpace = st.f_bavail * st.f_frsize

                # Send all relevant information in the event.
                freeSpaceRoot = st.f_bfree * st.f_frsize
                totalSpace = st.f_blocks * st.f_frsize
                diskUsage[dev] = bb.event.DiskUsageSample(freeSpace, freeSpaceRoot, totalSpace)

                if minSpace and freeSpace < minSpace:
                    # Always show warning, the self.checked would always be False if the action is WARN
                    if self.preFreeS[k] == 0 or self.preFreeS[k] - freeSpace > self.spaceInterval and not self.checked[k]:
                        logger.warning("The free space of %s (%s) is running low (%.3fGB left)" % \
                                (path, dev, freeSpace / 1024 / 1024 / 1024.0))
                        self.preFreeS[k] = freeSpace

                    if action == "STOPTASKS" and not self.checked[k]:
                        logger.error("No new tasks can be executed since the disk space monitor action is \"STOPTASKS\"!")
                        self.checked[k] = True
                        rq.finish_runqueue(False)
                        bb.event.fire(bb.event.DiskFull(dev, 'disk', freeSpace, path), self.configuration)
                    elif action == "ABORT" and not self.checked[k]:
                        logger.error("Immediately abort since the disk space monitor action is \"ABORT\"!")
                        self.checked[k] = True
                        rq.finish_runqueue(True)
                        bb.event.fire(bb.event.DiskFull(dev, 'disk', freeSpace, path), self.configuration)

                # The free inodes, integer number
                freeInode = st.f_favail

                if minInode and freeInode < minInode:
                    # Some filesystems use dynamic inodes so can't run out
                    # (e.g. btrfs). This is reported by the inode count being 0.
                    if st.f_files == 0:
                        self.devDict[k][2] = None
                        continue
                    # Always show warning, the self.checked would always be False if the action is WARN
                    if self.preFreeI[k] == 0 or self.preFreeI[k] - freeInode > self.inodeInterval and not self.checked[k]:
                        logger.warning("The free inode of %s (%s) is running low (%.3fK left)" % \
                                (path, dev, freeInode / 1024.0))
                        self.preFreeI[k] = freeInode

                    if action  == "STOPTASKS" and not self.checked[k]:
                        logger.error("No new tasks can be executed since the disk space monitor action is \"STOPTASKS\"!")
                        self.checked[k] = True
                        rq.finish_runqueue(False)
                        bb.event.fire(bb.event.DiskFull(dev, 'inode', freeInode, path), self.configuration)
                    elif action  == "ABORT" and not self.checked[k]:
                        logger.error("Immediately abort since the disk space monitor action is \"ABORT\"!")
                        self.checked[k] = True
                        rq.finish_runqueue(True)
                        bb.event.fire(bb.event.DiskFull(dev, 'inode', freeInode, path), self.configuration)

            bb.event.fire(bb.event.MonitorDiskEvent(diskUsage), self.configuration)
        return