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scsi_report_opcode(9) [centos man page]

SCSI_REPORT_OPCODE(9)						  SCSI mid layer					     SCSI_REPORT_OPCODE(9)

NAME
scsi_report_opcode - Find out if a given command opcode is supported SYNOPSIS
int scsi_report_opcode(struct scsi_device * sdev, unsigned char * buffer, unsigned int len, unsigned char opcode); ARGUMENTS
sdev scsi device to query buffer scratch buffer (must be at least 20 bytes long) len length of buffer opcode opcode for command to look up DESCRIPTION
Uses the REPORT SUPPORTED OPERATION CODES to look up the given opcode. Returns -EINVAL if RSOC fails, 0 if the command opcode is unsupported and 1 if the device claims to support the command. AUTHORS
James Bottomley <James.Bottomley@hansenpartnership.com> Author. Rob Landley <rob@landley.net> Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 SCSI_REPORT_OPCODE(9)

Check Out this Related Man Page

sysfs(2)							System Calls Manual							  sysfs(2)

NAME
sysfs - get file system type information SYNOPSIS
DESCRIPTION
is used to return information about the file system types configured in the system. The number arguments accepted by varies and depends on the opcode. The current recognized opcodes and their functions are: Translate fsname, a null-terminated file-system type identifier, into a file-system type index. Translate fs_index, a file-system type index, into a null-terminated file-system type identifier and write it into the buffer pointed to by buf; this buffer must be at least of size as defined in If there is no file-system type configured at fs_index, a null string is returned for the file-system type identifier. Return one more than the largest file system type configured. This is not the number of file system types configured, because the type numbers may not be contiguous. See the example below. RETURN VALUE
Upon successful completion, returns the file-system type index if the opcode is a value of 0 if the opcode is or the number of file system types configured if the opcode is Otherwise, a value of -1 is returned and is set to indicate the error. ERRORS
fails if one or more of the following are true and sets to the value indicated: fsname points to an invalid file-system identifier; fs_index is negative or greater than the largest file-system type index; opcode is invalid. buf or fsname points to an invalid user address. EXAMPLES
List the filesystem types configured in the system. sysfs(2)

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