mirror of https://github.com/mkerrisk/man-pages
init_module.2: Changes after review comments from Rusty Russell
Reviewed-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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Michael Kerrisk
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@ -65,6 +65,7 @@ flag is always specified, and the
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flag may additionally be specified.
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.\" O_TRUNC == KMOD_REMOVE_FORCE in kmod library
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.\" O_NONBLOCK == KMOD_REMOVE_NOWAIT in kmod library
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The various combinations for
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.I flags
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have the following effect:
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@ -77,7 +78,7 @@ The call returns immediately, with an error.
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The module is unloaded immediately,
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regardless of whether it has a nonzero reference count.
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.TP
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.B flags == 0
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.B (flags & O_NONBLOCK) == 0
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If
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.I flags
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does not specify
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@ -6,7 +6,7 @@
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.\" 2006-02-09, some reformatting by Luc Van Oostenryck; some
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.\" reformatting and rewordings by mtk
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.\"
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.TH INIT_MODULE 2 2012-10-09 "Linux" "Linux Programmer's Manual"
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.TH INIT_MODULE 2 2012-10-12 "Linux" "Linux Programmer's Manual"
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.SH NAME
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init_module \- load a kernel module
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.SH SYNOPSIS
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@ -38,9 +38,12 @@ The module image should be a valid ELF image, built for the running kernel.
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The
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.I param_values
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argument is a string containing space-delimited specifications of the
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values for module parameters.
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values for module parameters (defined inside the module using
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.BR module_param ()
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and
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.BR module_param_array ()).
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The kernel parses this string and initializes the specified
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parameters
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parameters.
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Each of the parameter specifications has the form:
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.RI " " name [ =value [ ,value ...]]
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@ -63,35 +66,36 @@ is set appropriately.
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.SH ERRORS
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.TP
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.B EBUSY
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The module's initialization routine failed.
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Timeout while trying to resolve a symbol reference by this module.
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.TP
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.B EEXIST
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A module with this name is already loaded.
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.TP
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.B EFAULT
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An address argument referred to an location that
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An address argument referred to a location that
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is outside the process's accessible address space.
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.TP
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.BR EINVAL " (Linux 2.6 onward)"
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.B EINVAL
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.I param_values
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is invalid, or some part of the ELF image in
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.IR module_image
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contains inconsistencies.
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.TP
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.BR EINVAL " (Linux 2.4 and earlier)"
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Some
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.I image
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slot is filled in incorrectly,
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.I image\->name
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does not correspond to the original module name, some
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.I image\->deps
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entry does not correspond to a loaded module,
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or some other similar inconsistency.
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.\" .TP
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.\" .BR EINVAL " (Linux 2.4 and earlier)"
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.\" Some
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.\" .I image
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.\" slot is filled in incorrectly,
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.\" .I image\->name
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.\" does not correspond to the original module name, some
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.\" .I image\->deps
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.\" entry does not correspond to a loaded module,
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.\" or some other similar inconsistency.
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.TP
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.B ENOEXEC
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The ELF image in
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The binary image supplied in
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.I module_image
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is too small or has corrupted segments.
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is not an ELF image,
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or is an ELF image that is invalid or for a different architecture.
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.TP
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.B EPERM
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The caller was not privileged
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@ -103,6 +107,16 @@ or module loading is disabled
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.IR /proc/sys/kernel/modules_disabled
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in
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.BR proc (5)).
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.PP
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In addition to the above errors, if the module's
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.I init
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function is executed and returns an error, then
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.BR init_module ()
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fails and
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.I errno
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is set to the value returned by the
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.I init
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function.
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.SH "CONFORMING TO"
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.BR init_module ()
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is Linux-specific.
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@ -126,7 +140,15 @@ In Linux 2.4 and earlier, this system call was rather different:
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.BI " int init_module(const char *" name ", struct module *" image );
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This version of the system call
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(User-space applications can detect which version of
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.BR init_module ()
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is available by calling
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.BR query_module ();
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the latter call fails with the error
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.BR ENOSYS
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on Linux 2.6 and later.)
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The older version of the system call
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loads the relocated module image pointed to by
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.I image
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into kernel space and runs the module's
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@ -139,7 +161,7 @@ system call does the relocation).
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.PP
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The module image begins with a module structure and is followed by
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code and data as appropriate.
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The module structure is defined as follows:
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Since Linux 2.2, the module structure is defined as follows:
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.PP
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.in +4n
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.nf
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@ -177,4 +199,5 @@ the rest of the module.
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.BR create_module (2),
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.BR delete_module (2),
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.BR query_module (2),
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.BR lsmod (8),
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.BR modprobe (8)
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