函数源码 |
Source File:block\scsi_ioctl.c |
Create Date:2022-07-27 19:11:37 |
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197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 | int blk_verify_command(unsigned char *cmd, fmode_t mode){ struct blk_cmd_filter *filter = &blk_default_cmd_filter; /* root can do any command. */ if (capable(CAP_SYS_RAWIO)) return 0; /* Anybody who can open the device can do a read-safe command */ if (test_bit(cmd[0], filter->read_ok)) return 0; /* Write-safe commands require a writable open */ if (test_bit(cmd[0], filter->write_ok) && (mode & FMODE_WRITE)) return 0; return -EPERM;} |