SCSI_REPORT_OPCODE(9) SCSI mid layer SCSI_REPORT_OPCODE(9)NAME
scsi_report_opcode - Find out if a given command opcode is supported
int scsi_report_opcode(struct scsi_device * sdev, unsigned char * buffer, unsigned int len, unsigned char opcode);
scsi device to query
scratch buffer (must be at least 20 bytes long)
length of buffer
opcode for command to look up
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.
James Bottomley <James.Bottomley@hansenpartnership.com>
Rob Landley <email@example.com>
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 SCSI_REPORT_OPCODE(9)
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sysfs(2) System Calls Manual sysfs(2)NAME
sysfs - get file system type information
is used to return information about the file system types configured in the system. The number arguments accepted by varies and depends on
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.
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.
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.
List the filesystem types configured in the system.
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