CN106571954B - Method and device for detecting abnormal restart reason of AP (access point) equipment - Google Patents
Method and device for detecting abnormal restart reason of AP (access point) equipment Download PDFInfo
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- CN106571954B CN106571954B CN201610933610.6A CN201610933610A CN106571954B CN 106571954 B CN106571954 B CN 106571954B CN 201610933610 A CN201610933610 A CN 201610933610A CN 106571954 B CN106571954 B CN 106571954B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0677—Localisation of faults
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/069—Management of faults, events, alarms or notifications using logs of notifications; Post-processing of notifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
Abstract
The invention discloses a method and a device for detecting abnormal restart reasons of AP equipment, wherein the method comprises the following steps: before the AP equipment is restarted, writing a restart reason mark and a restart log corresponding to the restart reason into a reserved memory; when the AP equipment is restarted, mapping to obtain a virtual address of the reserved memory; the restart log information in the reserved memory is backed up, and the current serial port printing information is recorded in real time; the invention can determine the specific reason of restarting each AP device, greatly improve the efficiency and accuracy of positioning the fault problem of the AP device and ensure the stability of the subsequent iteration of the version.
Description
Technical Field
The invention relates to the field of wireless networks, in particular to a method and a device for detecting abnormal restart reasons of AP (access point) equipment.
Background
WLAN (Wireless Local Area network) provides a Wireless connection service of a Local Area network, and can provide high-speed Wireless data access in a smaller range, which is one of the popular technologies in the IT (information technology) industry and is also a popular Wireless access mode.
Compared with a transmission wired Access mode, the wireless local area network enables the use of the network to be more free, thoroughly gets rid of the constraint of cable and port positions, is convenient to carry, has the advantage of moving, avoids or reduces complicated network wiring, and can establish the local area network covering the whole building or region only by arranging one or more AP (Access Point) devices.
The AP device is an important component of a wireless local area network, and is a wireless transceiver device, which can convert data received from a wired network (e.g., the Internet) into wireless signals for transmission, convert the received wireless signals into data, and forward the data to the wired network. The wireless local area network constructed by the WLAN technology is used as a supplement of a wired network, so that the constraint of the Ethernet is eliminated, and a convenient and fast network access mode is provided for a terminal user, therefore, the wireless network is more and more deployed, and a large number of AP (access point) devices are installed and used.
Sometimes, the AP device reboots during use, however, for the reason of rebooting, there is no clear positioning scheme at present. Although some AP devices currently have a function module for logging, for example, logging may be recorded when a kernel of the device is abnormally restarted, the crash log functions of existing AP devices are relatively single, and the reason for restarting cannot be distinguished in detail according to the log recorded by the AP devices, which affects the stability test and version release of versions, thereby affecting the iteration and stability of later versions.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a method and a device for detecting abnormal restart reasons of AP equipment, which can determine the specific restart reasons of the AP equipment, greatly improve the efficiency and accuracy of locating the failure problem of the AP equipment, and ensure the stability of subsequent iteration of versions.
In order to achieve the above object, the present invention provides a method for detecting an abnormal restart reason of an AP device, including the following steps:
writing a restart reason mark and a restart log corresponding to the restart reason into a reserved memory before restarting the AP equipment;
step two, when the AP equipment is restarted, mapping to obtain a virtual address of the reserved memory;
step three, the restart log information in the reserved memory is backed up, and the current serial port printing information is recorded in real time;
and step four, reading and storing the restart reason mark and the restart log in the reserved memory.
Further, the reserved memory sequentially comprises from high to low:
the area A is used for storing a restart reason mark;
the area B is mapped to the annular buffer area of the AP equipment system and used for storing the current serial port printing information in real time;
and the C area is used for backing up the B area.
Further, after the area C, the reserved memory further includes an area D for storing serial port detailed log information when a kernel error occurs.
Further, the reserved memory is a high-end memory of the AP device.
Further, in step four, after the restart reason flag in the reserved memory is saved, the a-region flag of the reserved memory is reassigned to the default value.
Further, in step two, the physical address of the reserved memory is mapped to the virtual address through an ioremap function.
Further, in step four, the restart reason flag and the restart log in the reserved memory are read by reading the proc file system, and are saved to the tmp directory file.
In order to achieve the above object, the present invention further provides an apparatus for detecting a cause of an abnormal restart of an AP device, including:
a restart preprocessing unit for writing a restart reason mark and a restart log corresponding to the restart reason into a reserved memory before the AP device is restarted;
the address mapping unit is used for mapping and obtaining the virtual address of the reserved memory when the AP equipment is restarted;
the log information backup and recording unit is used for backing up the restart log information in the reserved memory and recording the current serial port printing information in real time;
and the restart reason acquisition unit is used for reading and storing the restart reason mark and the restart log in the reserved memory.
Further, the reserved memory sequentially comprises from high to low:
the area A is used for storing a restart reason mark;
the area B is mapped to the annular buffer area of the AP equipment system and used for storing the current serial port printing information in real time;
and the C area is used for backing up the B area.
Further, after the area C, the reserved memory further includes an area D for storing serial port detailed log information when a kernel error occurs.
Compared with the prior art, the method and the device for detecting the abnormal restart reason of the AP equipment have the advantages that the reserved high-end memory is divided into different areas by adopting a mode of reserving the high-end memory, the restart reason is stored in the reserved high-end memory, the annular buffer area of the system is mapped, the restart log is backed up to the reserved high-end memory, and finally the restart reason is read by the file reading system and stored in the storage equipment.
Drawings
Fig. 1 is a flowchart illustrating steps of a method for detecting a cause of abnormal restart of an AP device according to the present invention;
FIG. 2 is a diagram illustrating the partitioning of the high-side memory according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the significance of several restart reason flags in area A of FIG. 2 according to an embodiment of the present invention
FIG. 4 is a diagram illustrating the generation of several restart reason flags according to an embodiment of the present invention;
FIG. 5 is a schematic flow chart illustrating a system after system startup according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an abnormal restart reason detection apparatus of an AP device according to the present invention.
Detailed Description
Other advantages and capabilities of the present invention will be readily apparent to those skilled in the art from the present disclosure by describing the embodiments of the present invention with specific embodiments thereof in conjunction with the accompanying drawings. The invention is capable of other and different embodiments and its several details are capable of modification in various other respects, all without departing from the spirit and scope of the present invention.
Fig. 1 is a flowchart illustrating steps of a method for detecting a cause of abnormal restart of an AP device according to the present invention. As shown in fig. 1, the method for detecting the reason for abnormal restart of an AP device according to the present invention includes the following steps:
In the invention, a section of memory is reserved in the system, the reserved memory is used for storing a flag bit of a restart reason and storing a restart log, and after the system is restarted under the condition of no power failure, the content in the reserved memory can still be reserved (due to the effect of a capacitor, the content can also be reserved under the condition that the single board has short power failure interval time), so that the reserved memory can be used for storing the log before the restart, and further analysis and processing can be carried out according to the restart log.
In the embodiment of the present invention, the system reserves the high-end memory of 1M, i.e. the device memory of 128M, for example, and the system reserves the 1M memory between 127 and 128 as the reserved memory, and is divided into the following sections, as shown in fig. 2:
and a region A: the size is 4k, and the restart reason mark is stored;
and a B region: the size of the serial port is 128k, and the serial port is mapped to a ring buffer (annular buffer area) of linux and used for storing the current serial port printing information in real time;
and a C region: the size of 128k is used for backup of the B area, and after the system is restarted, the 128k space of the B area can be covered by the output serial port printing information (content output by a printk function), so that the serial port log information before restarting (namely the content of the B area) needs to be backed up to the C area;
and (3) region D: the size of 764k is used to store the detailed serial log information when Kernel sonic occurs, that is, when the restart reason is a Kernel error, the restart log is written into the B area, and the D area stores more detailed serial log information for subsequent analysis and processing.
FIG. 3 is a schematic diagram illustrating the significance of several restart reason flags in area A of FIG. 2 according to an embodiment of the present invention. In the embodiment of the present invention, the restart reason mark uses ANSCII code corresponding to the letter, and the restart reason can be roughly classified into the following cases:
1) reb, representing reboot command restart, with the restart reason flag being 0x726562, where 0x72,0x65, and 0x62 correspond to the letters r, e, b, respectively;
2) pan, representing a kernel error (panic) restart, 0x70616e, where 0x70,0x61,0x6e correspond to the letters p, a, n, respectively;
3) dog, representing the restart of the watchdog, wherein the restart reason mark is 0x646f67, wherein 0x64,0x6f and 0x67 respectively correspond to letters d, o and g;
4) and the values other than the above 3 indicate that the system is powered on and started.
FIG. 4 is a diagram illustrating the generation of several restart reason flags according to an embodiment of the present invention. For restart reason reb, when the kernel receives the reboot command word: writing a RESTART reason flag in an area A of the reserved memory when LINUX _ REBOOT _ CMD _ RESTART: 0x 726562; when a kernel error (panic) occurs, processing is added in a kernel panic function, and a restart reason is written in an A area of a reserved memory: 0x70616 e; the restart reason mark defaults to watchdog restart (0x646f67), namely the restart reason mark is inquired firstly in the system starting process, and the default value 0x646f67 is assigned to the mark again after the restart reason mark is stored; the reasons are not considered as power-on starting.
And 102, when the AP equipment system is restarted, mapping to obtain the virtual address of the reserved memory.
In an embodiment of the present invention, the reserved 1M space of the high-side memory is reserved in advance when the system is started, and then the physical address of the reserved high-side memory is mapped to the virtual address through an ioremap function, the virtual address is reserved, and the subsequent related operations are performed around the virtual address.
And 103, backing up restart log information in the reserved memory, and recording the current serial port printing information in real time. In the embodiment of the present invention, before the system is restarted, the restart log information before the restart is stored in the B region of the reserved memory, and after the system is restarted, the 128k space in the B region is covered by the content output by the printk function, so that the serial port log information before the restart (i.e., the restart log) needs to be backed up to the C region, and the B region records the current serial port printing information (i.e., the content output by the printk function) in real time.
And 104, reading and storing the restart reason mark and the restart log in the reserved memory. In the embodiment of the present invention, 2 proc file nodes are established during the system startup process: /proc/kmsg _ rebot _ log; the system checks the flag bit of the area A in the starting process, stores the restart reason into a tmp directory file (/ tmp/log _ reboot _ replay) after judging the restart reason, and then reassigns the flag of the area A of the reserved high-end memory to be 0x646f67 (default is flag of watchdog); and simultaneously saving the restart log to a tmp directory file: and/tmp/log _ rebot _ message.
Fig. 5 is a schematic flow chart of the system after starting up according to the embodiment of the present invention. The invention will be further illustrated by the following specific examples: when the system is started, reserving a 1M high-end memory under UBOOT, and leading and starting a kernel (start _ kernel) by the kernel; the kernel reserves a high-end 1M memory; acquiring a physical address of a reserved high-end memory; mapping out a reserved high-end memory by using an ioremap function, and acquiring and storing a virtual address; backing up log information of a B area in a reserved high-end memory to a C area; directly assigning and mapping a B-area memory space in a reserved high-end memory to a linux ring buffer; b, recording current printk serial port printing information in real time by the reserved high-end memory; establishing a proc file node; and reading a restart reason mark and a restart log of the reserved high-end memory, printing the restart reason mark and the restart log to a serial port, simultaneously storing the restart reason mark and the restart log to a tmp directory, and subsequently uploading the log to a cloud terminal so as to facilitate cloud terminal analysis.
The invention can obtain the restarting reason of the AP equipment, saves the log information before the equipment is restarted, is beneficial to analyzing and processing the restarting reason, and greatly improves the stability of version iteration.
Fig. 6 is a schematic structural diagram of an abnormal restart reason detection apparatus of an AP device according to the present invention. As shown in fig. 6, an apparatus for detecting a cause of an abnormal restart of an AP device according to the present invention includes: a pre-restart processing unit 601, an address mapping unit 602, a log information backup and recording unit 603, and a restart reason acquisition unit 604.
The restart preprocessing unit 601 is configured to write a restart reason flag and a restart log corresponding to the restart reason into the reserved memory before triggering system restart.
In the invention, the system reserves a section of memory, and the reserved memory is used for storing the zone bit of the restart reason and storing the restart log. In the embodiment of the present invention, the system reserves the high-end memory of 1M, that is, for example, the device memory of 128M, and the system reserves the 1M memory between 127 and 128 as the reserved memory, and sequentially divides the reserved memory into the following sections:
and a region A: the size is 4k, and the restart reason mark is stored;
and a B region: the size of the serial port is 128k, and the serial port is mapped to a ring buffer (annular buffer area) of linux and used for storing the current serial port printing information in real time;
and a C region: size 128k for backup of zone B. After the system is restarted, the 128k space in the B area is covered by currently output serial port printing information (content output by a printk function), so that serial port log information before restarting (namely the content in the B area) needs to be backed up to the C area;
and (3) region D: the size of 764k is used to store the detailed serial log information when Kernel sonic occurs, that is, when the restart reason is a Kernel error, the restart log is written into the B area, and the D area stores more detailed serial log information for subsequent analysis and processing.
In the embodiment of the present invention, the restart reason mark uses ANSCII code corresponding to the letter, and the restart reason can be roughly classified into the following cases:
1) reb, representing the reboot command to restart, the corresponding restart reason flag is 0x726562, where 0x72,0x65, and 0x62 correspond to the letters r, e, b, respectively. When the kernel receives the reboot command word: writing a RESTART reason mark in an area A of the reserved memory when LINUX _ REBOOT _ CMD _ RESTART is started: 0x 726562;
2) and pan, representing a kernel error (panic) restart, and the corresponding restart reason flag is 0x70616e, wherein 0x70,0x61 and 0x6e correspond to letters p, a and n, respectively. When kernel error restarting occurs, adding processing in a kernel panic function, and writing a restarting reason in an A area of a reserved memory: 0x70616 e;
3) dog, indicating that the watchdog is restarted, the corresponding restart reason flag is 0x646f67, where 0x64,0x6f, and 0x67 correspond to the letters d, o, and g, respectively. The restart reason mark in the area a defaults to watchdog restart (0x646f67), that is, the restart reason mark is inquired first in the system starting process, and the default value 0x646f67 is assigned to the restart reason mark again after the restart reason mark is stored.
4) If the number is not the above 3, it indicates that the system is powered on.
The address mapping unit 602 maps and obtains the virtual address of the reserved memory when the system is started.
In an embodiment of the present invention, the 1M space of the upper memory is pre-reserved when the system is started, and the address mapping unit 602 uses an ioremap function to map the physical address of the reserved upper memory to a virtual address, and reserves the virtual address.
The log information backup and recording unit 603 is configured to backup restart log information in the reserved memory, and record current serial port printing information to the reserved memory in real time. In the embodiment of the present invention, before the system is restarted, the restart log information before the restart is stored in the B region of the reserved memory, and after the system is restarted, the 128k space in the B region is covered by the content output by the printk function, so that the log information backup and recording unit 603 needs to backup the serial port log information in the B region before the restart to the C region, and record the current serial port printing information (i.e., the content output by the printk function) in real time to the B region.
A restart reason obtaining unit 604, configured to read and store a restart reason flag and a restart log in the reserved memory. In the embodiment of the present invention, the restart reason obtaining unit 704 may establish 2 proc file nodes in the system starting process: /proc/kmsg _ rebot _ log; the restart reason acquiring unit 604 checks a flag bit of an a area of the reserved premium memory during the starting process, stores the restart reason to a tmp directory file (/ tmp/log _ reboot _ replay) after determining the restart reason, then reassigns the flag bit of the a area of the reserved premium memory to 0x646f67 (default is flag of watchdog), and simultaneously the restart reason acquiring unit 604 reads the restart log of the reserved premium memory and stores the restart log to the tmp directory file: and/tmp/log _ rebot _ message.
In summary, the method and apparatus for detecting the abnormal restart reason of the AP device in the present invention, by using the manner of reserving the high-end memory, divide the reserved high-end memory into different areas, store the restart reason in the reserved high-end memory, map the system ring buffer, backup the restart log to the reserved high-end memory, and finally read the restart reason and save the restart log to the storage device by reading the file system.
Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, the scope of the invention should be determined from the following claims.
Claims (8)
1. A method for detecting abnormal restart reasons of AP equipment comprises the following steps:
writing a restart reason mark and a restart log corresponding to a restart reason into a reserved memory before the AP equipment is restarted, wherein the reserved memory is a section of high-end memory of the AP equipment, and the reserved memory is reserved in advance when a system is started;
step two, when the AP equipment is restarted, mapping to obtain a virtual address of the reserved memory, mapping a physical address of the reserved memory to the virtual address through an ioremap function, and reserving the virtual address;
step three, the restart log information in the reserved memory is backed up, and the current serial port printing information is recorded in real time;
and step four, reading and storing the restart reason mark and the restart log in the reserved memory.
2. The method as claimed in claim 1, wherein the steps of sequentially starting from high to low for the reserved memories include:
the area A is used for storing a restart reason mark;
the area B is mapped to the annular buffer area of the AP equipment system and used for storing the current serial port printing information in real time;
and the C area is used for backing up the B area.
3. The method according to claim 2, wherein after the C area, the reserved memory further includes a D area for storing serial port detailed log information when a kernel error occurs.
4. The method according to claim 3, wherein the method for detecting the abnormal restart reason of the AP device comprises: in the fourth step, after the restart reason flag in the reserved memory is saved, the a-region flag of the reserved memory is reassigned to the default value.
5. The method according to claim 3, wherein the method for detecting the abnormal restart reason of the AP device comprises: in the fourth step, the restart reason mark and the restart log in the reserved memory are read by reading the proc file system and are stored in the tmp directory file.
6. An abnormal restart reason detection apparatus of an AP device, comprising:
a restart preprocessing unit, which writes a restart reason mark and a restart log corresponding to the restart reason into a reserved memory before the AP device is restarted, where the reserved memory is a section of high-end memory of the AP device, and the reserved memory is reserved in advance when a system is started;
the address mapping unit is used for mapping to obtain a virtual address of the reserved memory when the AP equipment is restarted, mapping a physical address of the reserved memory to the virtual address through an ioremap function, and reserving the virtual address;
the log information backup and recording unit is used for backing up the restart log information in the reserved memory and recording the current serial port printing information in real time;
and the restart reason acquisition unit is used for reading and storing the restart reason mark and the restart log in the reserved memory.
7. The apparatus of claim 6, wherein the reserved memories sequentially comprise, from high to low:
the area A is used for storing a restart reason mark;
the area B is mapped to the annular buffer area of the AP equipment system and used for storing the current serial port printing information in real time;
and the C area is used for backing up the B area.
8. The apparatus for detecting a cause of abnormal restart of an AP device according to claim 7, wherein: and after the area C, the reserved memory also comprises an area D for storing the detailed log information of the serial port when the kernel error occurs.
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| CN107133143A (en) * | 2017-04-25 | 2017-09-05 | 努比亚技术有限公司 | Restart daily record merging method, method for uploading, system and readable storage medium storing program for executing |
| CN107396389B (en) * | 2017-06-01 | 2020-12-15 | 台州市吉吉知识产权运营有限公司 | Method and system for diagnosing abnormal restart time of wireless access equipment |
| CN107517472B (en) * | 2017-08-10 | 2021-04-06 | 京信通信系统（中国）有限公司 | Method for protecting state of base station and base station |
| CN109426606A (en) * | 2017-08-23 | 2019-03-05 | 东软集团股份有限公司 | Kernel failure diagnosis information processing method, device, storage medium and electronic equipment |
| CN108012031B (en) * | 2017-11-30 | 2021-03-26 | 努比亚技术有限公司 | Mobile terminal restart positioning method, mobile terminal and computer readable storage medium |
| CN108170549B (en) * | 2017-12-28 | 2021-11-16 | 努比亚技术有限公司 | Mobile terminal restart positioning method, mobile terminal and computer readable storage medium |
| CN108182123A (en) * | 2017-12-28 | 2018-06-19 | 努比亚技术有限公司 | Mobile terminal restarts localization method, mobile terminal and computer readable storage medium |
| CN108089937B (en) * | 2017-12-28 | 2022-01-14 | 努比亚技术有限公司 | Direct memory allocation-based restart positioning method, mobile terminal and storage medium |
| CN108182133B (en) * | 2017-12-28 | 2022-01-14 | 努比亚技术有限公司 | Mobile terminal restart positioning method, mobile terminal and computer readable storage medium |
| CN108595311B (en) * | 2017-12-28 | 2021-11-16 | 努比亚技术有限公司 | Restart positioning method based on peripheral interface, mobile terminal and readable storage medium |
| CN108108257B (en) * | 2017-12-28 | 2022-03-18 | 努比亚技术有限公司 | Restart positioning method based on MDSS, mobile terminal and readable storage medium |
| CN108268335B (en) * | 2018-01-31 | 2022-04-19 | 努比亚技术有限公司 | Restart positioning method based on system service, mobile terminal and storage medium |
| CN110309008B (en) * | 2018-03-20 | 2023-06-20 | 浙江宇视科技有限公司 | Method and system for storing memory data in case of system abnormality |
| CN109471670A (en) * | 2018-12-21 | 2019-03-15 | 迈普通信技术股份有限公司 | Equipment starting method and electronic equipment |
| CN111858114A (en) * | 2019-04-30 | 2020-10-30 | 阿里巴巴集团控股有限公司 | Equipment start exception handling method, device start control method, device and system |
| CN113672071A (en) * | 2020-05-15 | 2021-11-19 | 宇龙计算机通信科技(深圳)有限公司 | Operating system running method and device, storage medium and terminal |
| CN112860466B (en) * | 2020-12-31 | 2022-11-15 | 东风汽车集团有限公司 | Vehicle-mounted entertainment system restart fault diagnosis method and system |
| CN114124664A (en) * | 2021-11-23 | 2022-03-01 | 上海新炬网络技术有限公司 | Method for judging restart of network equipment based on log and equipment neighbor relation |
| CN116680208A (en) * | 2022-12-16 | 2023-09-01 | 荣耀终端有限公司 | Abnormality recognition method and electronic device |
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| CN105760241B (en) * | 2014-12-18 | 2019-07-26 | 联想(北京)有限公司 | A kind of internal storage data deriving method and system |
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