函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:init\do_mounts_md.c Create Date:2022-07-27 15:21:38
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：md_setup_drive

函数原型：static void __init md_setup_drive(void)

返回类型：void

参数：无

123  以ent小于md_setup_ents循环
125  err等于0
130  minor等于minor
131  partitioned等于partitioned
132  devname等于device_names
134  输出格式化串
135  如果partitioned则dev等于MKDEV(mdp_major, minor << 63 partitions with the alternate major number (mdp) )
137  否则dev等于MKDEV(MD_MAJOR, minor)
139  create_dev(name, dev)
140  以i < MD_SB_DISKS && devname != NULL循环
145  p等于strchr - Find the first occurrence of the character c in the string s.*@s: the string to be searched*@c: the character to search for
146  如果p则p自加等于0
149  dev等于Convert a name into device number
150  如果字符串指定长度比较恒等于0则devname加等于5
152  snprintf - Format a string and place it in a buffer*@buf: The buffer to place the result into*@size: The size of the buffer, including the trailing null space*@fmt: The format string to use*@
153  rdev等于bstat(comp_name)
154  如果rdev则dev等于new_decode_dev(rdev)
156  如果非dev则
161  devices[i]等于dev
163  devname等于p
165  devices[i]等于0
167  如果非i则继续下一循环
170  printk - print a kernel message*@fmt: format string* This is printk(). It can be called from any context. We want it to work.* We try to grab the console_lock. If we succeed, it's easy - we log the* output and call the console drivers
174  fd等于ksys_open(name, 0, 0)
175  如果fd小于0则
176  printk - print a kernel message*@fmt: format string* This is printk(). It can be called from any context. We want it to work.* We try to grab the console_lock. If we succeed, it's easy - we log the* output and call the console drivers
178  继续下一循环
180  如果ksys_ioctl(fd, SET_ARRAY_INFO, 0)恒等于负EBUSY则
181  printk - print a kernel message*@fmt: format string* This is printk(). It can be called from any context. We want it to work.* We try to grab the console_lock. If we succeed, it's easy - we log the* output and call the console drivers
184  In contrast to sys_close(), this stub does not check whether the syscall* should or should not be restarted, but returns the raw error codes from* __close_fd().
185  继续下一循环
188  如果level不等于we need a value for 'no level specified' and 0* means 'raid0', so we need something else. This is* for internal use only则
191  level等于level
192  size等于0
193  nr_disks等于0
194  raid_disks等于0
195  当devices[raid_disks]循环
196  raid_disks自加
197  md_minor等于minor
198  not_persistent等于1
200  1 State bits (clean, ...) 等于1左移Superblock state bits位
201  0 the array's physical layout 等于0
202  1 chunk size in bytes 等于chunk
203  err等于ksys_ioctl(fd, SET_ARRAY_INFO, (long) & ainfo)
204  以非err且i小于等于MD_SB_DISKS循环
205  dev等于devices[i]
206  如果非dev则退出
208  * configuration/status of one particular disk等于i
209  raid_disk等于i
210  state等于1左移disk is running or spare disk 位按位或1左移disk is in sync with the raid set 位
211  major等于MAJOR(dev)
212  minor等于MINOR(dev)
213  err等于ksys_ioctl(fd, ADD_NEW_DISK, (long) & dinfo)
216  否则
218  以i小于等于MD_SB_DISKS循环
219  dev等于devices[i]
220  如果非dev则退出
222  major等于MAJOR(dev)
223  minor等于MINOR(dev)
224  ksys_ioctl(fd, ADD_NEW_DISK, (long) & dinfo)
227  如果非err则err等于ksys_ioctl(fd, usage , 0)
229  如果err则printk - print a kernel message*@fmt: format string* This is printk(). It can be called from any context. We want it to work.* We try to grab the console_lock. If we succeed, it's easy - we log the* output and call the console drivers
231  否则
237  In contrast to sys_close(), this stub does not check whether the syscall* should or should not be restarted, but returns the raw error codes from* __close_fd().
238  fd等于ksys_open(name, 0, 0)
239  ksys_ioctl(fd, -read partition table , 0)
241  In contrast to sys_close(), this stub does not check whether the syscall* should or should not be restarted, but returns the raw error codes from* __close_fd().
调用者
名称描述
md_run_setup