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The following describes the usb_stor_control_thread () function. The wake-up command is the up ( amp; (us- gt; sema) from queuecommand, and the us- gt; sulfate is assigned to the server load balancer, in contrast, the server load balancer is a parameter passed in when the SCSI core layer calls the queuecommand. Focus on usb_stor_control_thread ()
The following describes the usb_stor_control_thread () function. What wakes up is the up ( (us-> sema) from the queuecommand, and us-> sulfate is assi
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unsigned int delay_use = 5;
111 module_param (delay_use, uint, s_irugo | s_iwusr );
112 module_parm_desc (delay_use, "seconds todelay before using a new device ");
Set delay_use to 5, while module_param is a macro provided by Linux kernel 2.6, so that delay_use can be set when the module is loaded. (If this parameter is not set, the value 5 indicates that a new device is waiting for a delay of 5 seconds .) Why latency? When the inserted USB
-storage: devicescan complete \ n ");
936
937/* shocould we unbind if no devices weredetected? */
938}
939
940 scsi_host_put (us_to_host (us ));
941 complete_and_exit ( threads_gone, 0 );
942}
Row 3, where does delay_use come from? In the same file, a static variable is defined at the beginning:
110 static unsigned int delay_use = 5;
111 module_param (delay_use, uint, S_IRUGO | S_IWUSR );
112 MODULE_PARM_DESC (delay_use, "seconds todelay before using a new device ");
Set delay_use to
We followed storage_probe () almost completely, and it seems that everything is about to end, but do you think you haven't understood how the device works so far? USB flash drives are not only USB devices but also "disks". They also need to comply with the USB Mass Storage protocol and Transparent SCSI specifications.
I. Solutions for using USB flash drives on Vmware Server2.0:
1. Add USB controller :(Note: All of the following operations must be performed on the server.)
A. Select the virtual machine to add the hardware, click the summary tab, and click "add Hardware" in commands on the right panel ". For example:
B. In the "add hardware wizard" dialog box that appears,
Some people say that the optical drive will not be used in the future. The Blu-ray HD format has just been defeated by the hddvd format, and it is too late to celebrate the victory. The fate of the optical drive will soon be eliminated. With the increase in network bandwidth and the popularization of Mobile 3G/4G, as the capacity of hard disks and USB
following in the public section of the header file ufirewalldlg. h:
void GetDriverName(DWORD dwData);CString DriverName;It should be noted that, because the program uses a macro starting with DBT _ such as dbt_devtyp_volume, it must contain the header file "DBT. H ". Define another portable global variable I to save the drive letter of the removable disk. So far, the Program for judging the drive letter h
The following describes the usb_stor_control_thread () function. What wakes up is the up ( (us-> sema) from the queuecommand, and us-> sulfate is assigned to the Server Load balancer, in contrast, the Server Load balancer is a parameter passed in when the SCSI core layer calls the queuecommand. Focus on usb_stor_control_thread (). Row 3: As mentioned earlier, we have to look at the dev_mutex lock from a higher perspective after reading the entire module.
Line 3: If us_fw.x_disconnecting is set,
The following describes the usb_stor_control_thread () function. What wakes up is the up ( (US-> SEMA) from the queuecommand, and us-> sulfate is assigned to the Server Load balancer, in contrast, the Server Load balancer is a parameter passed in when the SCSI core layer calls the queuecommand. Focus on usb_stor_control_thread (). Row 3: As mentioned earlier, we have to look at the dev_mutex lock from a higher perspective after reading the entire module.
Line 3: If us_fw.x_disconnecting is set,
unsigned int delay_use = 5;
111 module_param (delay_use, uint, S_IRUGO | S_IWUSR );
112 MODULE_PARM_DESC (delay_use, "seconds todelay before using a new device ");
Set delay_use to 5, while module_param is a macro provided by Linux Kernel 2.6, so that delay_use can be set when the module is loaded. (If this parameter is not set, the value 5 indicates that a new device is waiting for a delay of 5 seconds .) Why latency? When the inserted USB
Fortunately, before you begin, install VMware Tools software so that virtual machines and hosts can share data, files, and so on how to install the system using a USB flash drive under a virtual machine: 1, the U disk must be recognized on the host (not the virtual machine system) 2, U disk must be in the form of mecha
The first step is to view all the current disk information and find the device ID of the USB disk. For example:/dev/sdb specific operation method: (1) enter the sudofdisk-l command in the terminal and press enter to view all current disks. (2) Check the USB flash disk or the disk information you need to search for. You can exclude it by knowing the disk size. Aft
How to install windows with a USB flash drivePreface
Most computer-related shoes have encountered many experiences that require system installation. In fact, it is very easy to install or reinstall the system for any children's shoes that have some computer experience. Here is a detailed integration tutorial record. If there is a system installation task in the future, you can share the link so that they c
Solve the "Deviceisbusy"-Linux general technology-Linux technology and application information that appears when you attach a USB flash drive or a mobile hard drive in Linux. The following is a detailed description. When you mount a USB
When a USB flash drive or camera is inserted into the USB port, how can the program detect it?Hey, what the landlord wants is similar to a small program I recently wrote. The following is my simple USB flash
Mount the USB flash drive another day and mount the dvd and mobile hard drive. 1. before inserting the USB flash drive, # cat/proc/tartitions2, insert the
-2.6.22/drivers # cd usb/
Lfg1:/usr/src/linux-2.6.22/drivers/usb # ls
Kconfig Makefile README atm class core gadget host image misc mon
Serial storage usb-skeleton.c
Note that each directory contains a Kconfig file and Makefile, which is very important. We will introduce it later.
Our story is based on the drivers/usb
TIPS: Use Cryptsetup to encrypt the USB flash drive
Today, the storage and data transmission capabilities of USB flash drives are very strong, and can be run across various platforms. The storage space even reaches 256 GB, compa
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