2005-04-16 16:20:36 -06:00
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/*
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* file.c
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*
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* Copyright (C) 1995, 1996 by Volker Lendecke
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* Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
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*
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*/
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2014-04-08 17:04:14 -06:00
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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2005-04-16 16:20:36 -06:00
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#include <asm/uaccess.h>
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#include <linux/time.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/fcntl.h>
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#include <linux/stat.h>
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#include <linux/mm.h>
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#include <linux/vmalloc.h>
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Detach sched.h from mm.h
First thing mm.h does is including sched.h solely for can_do_mlock() inline
function which has "current" dereference inside. By dealing with can_do_mlock()
mm.h can be detached from sched.h which is good. See below, why.
This patch
a) removes unconditional inclusion of sched.h from mm.h
b) makes can_do_mlock() normal function in mm/mlock.c
c) exports can_do_mlock() to not break compilation
d) adds sched.h inclusions back to files that were getting it indirectly.
e) adds less bloated headers to some files (asm/signal.h, jiffies.h) that were
getting them indirectly
Net result is:
a) mm.h users would get less code to open, read, preprocess, parse, ... if
they don't need sched.h
b) sched.h stops being dependency for significant number of files:
on x86_64 allmodconfig touching sched.h results in recompile of 4083 files,
after patch it's only 3744 (-8.3%).
Cross-compile tested on
all arm defconfigs, all mips defconfigs, all powerpc defconfigs,
alpha alpha-up
arm
i386 i386-up i386-defconfig i386-allnoconfig
ia64 ia64-up
m68k
mips
parisc parisc-up
powerpc powerpc-up
s390 s390-up
sparc sparc-up
sparc64 sparc64-up
um-x86_64
x86_64 x86_64-up x86_64-defconfig x86_64-allnoconfig
as well as my two usual configs.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-20 15:22:52 -06:00
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#include <linux/sched.h>
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2005-04-16 16:20:36 -06:00
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2011-01-12 15:37:47 -07:00
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#include "ncp_fs.h"
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2005-04-16 16:20:36 -06:00
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2011-07-16 18:44:56 -06:00
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static int ncp_fsync(struct file *file, loff_t start, loff_t end, int datasync)
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2005-04-16 16:20:36 -06:00
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{
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2011-07-16 18:44:56 -06:00
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return filemap_write_and_wait_range(file->f_mapping, start, end);
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2005-04-16 16:20:36 -06:00
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}
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/*
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* Open a file with the specified read/write mode.
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*/
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int ncp_make_open(struct inode *inode, int right)
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{
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int error;
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int access;
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error = -EINVAL;
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if (!inode) {
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2014-04-08 17:04:14 -06:00
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pr_err("%s: got NULL inode\n", __func__);
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2005-04-16 16:20:36 -06:00
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goto out;
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}
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2014-04-08 17:04:15 -06:00
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ncp_dbg(1, "opened=%d, volume # %u, dir entry # %u\n",
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2005-04-16 16:20:36 -06:00
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atomic_read(&NCP_FINFO(inode)->opened),
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NCP_FINFO(inode)->volNumber,
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NCP_FINFO(inode)->dirEntNum);
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error = -EACCES;
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2006-03-23 04:00:43 -07:00
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mutex_lock(&NCP_FINFO(inode)->open_mutex);
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2005-04-16 16:20:36 -06:00
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if (!atomic_read(&NCP_FINFO(inode)->opened)) {
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struct ncp_entry_info finfo;
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int result;
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/* tries max. rights */
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finfo.access = O_RDWR;
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result = ncp_open_create_file_or_subdir(NCP_SERVER(inode),
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inode, NULL, OC_MODE_OPEN,
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0, AR_READ | AR_WRITE, &finfo);
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if (!result)
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goto update;
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/* RDWR did not succeeded, try readonly or writeonly as requested */
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switch (right) {
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case O_RDONLY:
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finfo.access = O_RDONLY;
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result = ncp_open_create_file_or_subdir(NCP_SERVER(inode),
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inode, NULL, OC_MODE_OPEN,
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0, AR_READ, &finfo);
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break;
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case O_WRONLY:
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finfo.access = O_WRONLY;
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result = ncp_open_create_file_or_subdir(NCP_SERVER(inode),
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inode, NULL, OC_MODE_OPEN,
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0, AR_WRITE, &finfo);
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break;
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}
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if (result) {
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2014-04-08 17:04:16 -06:00
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ncp_vdbg("failed, result=%d\n", result);
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2005-04-16 16:20:36 -06:00
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goto out_unlock;
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}
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/*
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* Update the inode information.
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*/
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update:
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ncp_update_inode(inode, &finfo);
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atomic_set(&NCP_FINFO(inode)->opened, 1);
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}
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access = NCP_FINFO(inode)->access;
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2014-04-08 17:04:16 -06:00
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ncp_vdbg("file open, access=%x\n", access);
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2005-04-16 16:20:36 -06:00
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if (access == right || access == O_RDWR) {
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atomic_inc(&NCP_FINFO(inode)->opened);
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error = 0;
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}
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out_unlock:
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2006-03-23 04:00:43 -07:00
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mutex_unlock(&NCP_FINFO(inode)->open_mutex);
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2005-04-16 16:20:36 -06:00
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out:
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return error;
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}
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static ssize_t
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ncp_file_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
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{
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2014-10-31 00:41:28 -06:00
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struct inode *inode = file_inode(file);
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2005-04-16 16:20:36 -06:00
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size_t already_read = 0;
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off_t pos;
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size_t bufsize;
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int error;
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void* freepage;
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size_t freelen;
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2014-10-31 00:41:28 -06:00
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ncp_dbg(1, "enter %pD2\n", file);
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2005-04-16 16:20:36 -06:00
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pos = *ppos;
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if ((ssize_t) count < 0) {
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return -EINVAL;
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}
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if (!count)
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return 0;
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if (pos > inode->i_sb->s_maxbytes)
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return 0;
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if (pos + count > inode->i_sb->s_maxbytes) {
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count = inode->i_sb->s_maxbytes - pos;
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}
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error = ncp_make_open(inode, O_RDONLY);
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if (error) {
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2014-04-08 17:04:15 -06:00
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ncp_dbg(1, "open failed, error=%d\n", error);
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2005-04-16 16:20:36 -06:00
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return error;
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}
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bufsize = NCP_SERVER(inode)->buffer_size;
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error = -EIO;
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freelen = ncp_read_bounce_size(bufsize);
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freepage = vmalloc(freelen);
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if (!freepage)
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goto outrel;
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error = 0;
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/* First read in as much as possible for each bufsize. */
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while (already_read < count) {
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int read_this_time;
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size_t to_read = min_t(unsigned int,
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bufsize - (pos % bufsize),
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count - already_read);
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error = ncp_read_bounce(NCP_SERVER(inode),
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NCP_FINFO(inode)->file_handle,
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pos, to_read, buf, &read_this_time,
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freepage, freelen);
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if (error) {
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error = -EIO; /* NW errno -> Linux errno */
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break;
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}
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pos += read_this_time;
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buf += read_this_time;
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already_read += read_this_time;
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if (read_this_time != to_read) {
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break;
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}
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}
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vfree(freepage);
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*ppos = pos;
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file_accessed(file);
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2014-10-31 00:41:28 -06:00
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ncp_dbg(1, "exit %pD2\n", file);
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2005-04-16 16:20:36 -06:00
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outrel:
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ncp_inode_close(inode);
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return already_read ? already_read : error;
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}
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static ssize_t
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ncp_file_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
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{
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2014-10-31 00:41:28 -06:00
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struct inode *inode = file_inode(file);
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2005-04-16 16:20:36 -06:00
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size_t already_written = 0;
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off_t pos;
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size_t bufsize;
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int errno;
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void* bouncebuffer;
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2014-10-31 00:41:28 -06:00
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ncp_dbg(1, "enter %pD2\n", file);
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2005-04-16 16:20:36 -06:00
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if ((ssize_t) count < 0)
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return -EINVAL;
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pos = *ppos;
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if (file->f_flags & O_APPEND) {
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2010-09-26 17:47:33 -06:00
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pos = i_size_read(inode);
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2005-04-16 16:20:36 -06:00
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}
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if (pos + count > MAX_NON_LFS && !(file->f_flags&O_LARGEFILE)) {
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if (pos >= MAX_NON_LFS) {
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return -EFBIG;
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}
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if (count > MAX_NON_LFS - (u32)pos) {
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count = MAX_NON_LFS - (u32)pos;
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}
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}
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if (pos >= inode->i_sb->s_maxbytes) {
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if (count || pos > inode->i_sb->s_maxbytes) {
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return -EFBIG;
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}
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}
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if (pos + count > inode->i_sb->s_maxbytes) {
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count = inode->i_sb->s_maxbytes - pos;
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}
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if (!count)
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return 0;
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errno = ncp_make_open(inode, O_WRONLY);
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if (errno) {
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2014-04-08 17:04:15 -06:00
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ncp_dbg(1, "open failed, error=%d\n", errno);
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2005-04-16 16:20:36 -06:00
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return errno;
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}
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bufsize = NCP_SERVER(inode)->buffer_size;
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already_written = 0;
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2012-03-26 07:59:21 -06:00
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errno = file_update_time(file);
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if (errno)
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goto outrel;
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2005-04-16 16:20:36 -06:00
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bouncebuffer = vmalloc(bufsize);
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if (!bouncebuffer) {
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errno = -EIO; /* -ENOMEM */
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goto outrel;
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}
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while (already_written < count) {
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int written_this_time;
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size_t to_write = min_t(unsigned int,
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bufsize - (pos % bufsize),
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count - already_written);
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if (copy_from_user(bouncebuffer, buf, to_write)) {
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errno = -EFAULT;
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break;
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}
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if (ncp_write_kernel(NCP_SERVER(inode),
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NCP_FINFO(inode)->file_handle,
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pos, to_write, bouncebuffer, &written_this_time) != 0) {
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errno = -EIO;
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break;
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}
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pos += written_this_time;
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buf += written_this_time;
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already_written += written_this_time;
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if (written_this_time != to_write) {
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break;
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}
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}
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vfree(bouncebuffer);
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*ppos = pos;
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2010-09-26 17:47:33 -06:00
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if (pos > i_size_read(inode)) {
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mutex_lock(&inode->i_mutex);
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if (pos > i_size_read(inode))
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i_size_write(inode, pos);
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mutex_unlock(&inode->i_mutex);
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2005-04-16 16:20:36 -06:00
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}
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2014-10-31 00:41:28 -06:00
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ncp_dbg(1, "exit %pD2\n", file);
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2005-04-16 16:20:36 -06:00
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outrel:
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ncp_inode_close(inode);
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return already_written ? already_written : errno;
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}
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static int ncp_release(struct inode *inode, struct file *file) {
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if (ncp_make_closed(inode)) {
|
2014-04-08 17:04:15 -06:00
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ncp_dbg(1, "failed to close\n");
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2005-04-16 16:20:36 -06:00
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}
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return 0;
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}
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2006-03-28 02:56:42 -07:00
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const struct file_operations ncp_file_operations =
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2005-04-16 16:20:36 -06:00
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{
|
2010-09-26 17:47:33 -06:00
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.llseek = generic_file_llseek,
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2005-04-16 16:20:36 -06:00
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.read = ncp_file_read,
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.write = ncp_file_write,
|
2010-05-05 07:15:37 -06:00
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.unlocked_ioctl = ncp_ioctl,
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2006-10-01 00:27:55 -06:00
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#ifdef CONFIG_COMPAT
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.compat_ioctl = ncp_compat_ioctl,
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#endif
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2005-04-16 16:20:36 -06:00
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.mmap = ncp_mmap,
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.release = ncp_release,
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.fsync = ncp_fsync,
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};
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|
2007-02-12 01:55:39 -07:00
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const struct inode_operations ncp_file_inode_operations =
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2005-04-16 16:20:36 -06:00
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{
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.setattr = ncp_notify_change,
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};
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