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-rw-r--r--fs/gfs2/jdata.c389
1 files changed, 0 insertions, 389 deletions
diff --git a/fs/gfs2/jdata.c b/fs/gfs2/jdata.c
deleted file mode 100644
index e43eaf133f10..000000000000
--- a/fs/gfs2/jdata.c
+++ /dev/null
@@ -1,389 +0,0 @@
-/*
- * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License v.2.
- */
-
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/completion.h>
-#include <linux/buffer_head.h>
-#include <asm/semaphore.h>
-#include <asm/uaccess.h>
-
-#include "gfs2.h"
-#include "bmap.h"
-#include "inode.h"
-#include "jdata.h"
-#include "meta_io.h"
-#include "trans.h"
-
-int gfs2_internal_read(struct gfs2_inode *ip,
- struct file_ra_state *ra_state,
- char *buf, loff_t *pos, unsigned size)
-{
- return gfs2_jdata_read_mem(ip, buf, *pos, size);
-}
-
-int gfs2_jdata_get_buffer(struct gfs2_inode *ip, uint64_t block, int new,
- struct buffer_head **bhp)
-{
- struct buffer_head *bh;
- int error = 0;
-
- if (new) {
- bh = gfs2_meta_new(ip->i_gl, block);
- gfs2_trans_add_bh(ip->i_gl, bh, 1);
- gfs2_metatype_set(bh, GFS2_METATYPE_JD, GFS2_FORMAT_JD);
- gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
- } else {
- error = gfs2_meta_read(ip->i_gl, block,
- DIO_START | DIO_WAIT, &bh);
- if (error)
- return error;
- if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_JD)) {
- brelse(bh);
- return -EIO;
- }
- }
-
- *bhp = bh;
-
- return 0;
-}
-
-/**
- * gfs2_copy2mem - Trivial copy function for gfs2_jdata_read()
- * @bh: The buffer to copy from, or NULL meaning zero the buffer
- * @buf: The buffer to copy/zero
- * @offset: The offset in the buffer to copy from
- * @size: The amount of data to copy/zero
- *
- * Returns: errno
- */
-
-int gfs2_copy2mem(struct buffer_head *bh, char **buf, unsigned int offset,
- unsigned int size)
-{
- if (bh)
- memcpy(*buf, bh->b_data + offset, size);
- else
- memset(*buf, 0, size);
- *buf += size;
- return 0;
-}
-
-/**
- * gfs2_copy2user - Copy bytes to user space for gfs2_jdata_read()
- * @bh: The buffer
- * @buf: The destination of the data
- * @offset: The offset into the buffer
- * @size: The amount of data to copy
- *
- * Returns: errno
- */
-
-int gfs2_copy2user(struct buffer_head *bh, char **buf, unsigned int offset,
- unsigned int size)
-{
- int error;
-
- if (bh)
- error = copy_to_user(*buf, bh->b_data + offset, size);
- else
- error = clear_user(*buf, size);
-
- if (error)
- error = -EFAULT;
- else
- *buf += size;
-
- return error;
-}
-
-static int jdata_read_stuffed(struct gfs2_inode *ip, char *buf,
- unsigned int offset, unsigned int size,
- read_copy_fn_t copy_fn)
-{
- struct buffer_head *dibh;
- int error;
-
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (!error) {
- error = copy_fn(dibh, &buf,
- offset + sizeof(struct gfs2_dinode), size);
- brelse(dibh);
- }
-
- return (error) ? error : size;
-}
-
-/**
- * gfs2_jdata_read - Read a jdata file
- * @ip: The GFS2 Inode
- * @buf: The buffer to place result into
- * @offset: File offset to begin jdata_readng from
- * @size: Amount of data to transfer
- * @copy_fn: Function to actually perform the copy
- *
- * The @copy_fn only copies a maximum of a single block at once so
- * we are safe calling it with int arguments. It is done so that
- * we don't needlessly put 64bit arguments on the stack and it
- * also makes the code in the @copy_fn nicer too.
- *
- * Returns: The amount of data actually copied or the error
- */
-
-int gfs2_jdata_read(struct gfs2_inode *ip, char __user *buf, uint64_t offset,
- unsigned int size, read_copy_fn_t copy_fn)
-{
- struct gfs2_sbd *sdp = ip->i_sbd;
- uint64_t lblock, dblock;
- uint32_t extlen = 0;
- unsigned int o;
- int copied = 0;
- int error = 0;
-
- if (offset >= ip->i_di.di_size)
- return 0;
-
- if ((offset + size) > ip->i_di.di_size)
- size = ip->i_di.di_size - offset;
-
- if (!size)
- return 0;
-
- if (gfs2_is_stuffed(ip))
- return jdata_read_stuffed(ip, buf, (unsigned int)offset, size,
- copy_fn);
-
- if (gfs2_assert_warn(sdp, gfs2_is_jdata(ip)))
- return -EINVAL;
-
- lblock = offset;
- o = do_div(lblock, sdp->sd_jbsize) +
- sizeof(struct gfs2_meta_header);
-
- while (copied < size) {
- unsigned int amount;
- struct buffer_head *bh;
- int new;
-
- amount = size - copied;
- if (amount > sdp->sd_sb.sb_bsize - o)
- amount = sdp->sd_sb.sb_bsize - o;
-
- if (!extlen) {
- new = 0;
- error = gfs2_block_map(ip, lblock, &new,
- &dblock, &extlen);
- if (error)
- goto fail;
- }
-
- if (extlen > 1)
- gfs2_meta_ra(ip->i_gl, dblock, extlen);
-
- if (dblock) {
- error = gfs2_jdata_get_buffer(ip, dblock, new, &bh);
- if (error)
- goto fail;
- dblock++;
- extlen--;
- } else
- bh = NULL;
-
- error = copy_fn(bh, &buf, o, amount);
- brelse(bh);
- if (error)
- goto fail;
-
- copied += amount;
- lblock++;
-
- o = sizeof(struct gfs2_meta_header);
- }
-
- return copied;
-
- fail:
- return (copied) ? copied : error;
-}
-
-/**
- * gfs2_copy_from_mem - Trivial copy function for gfs2_jdata_write()
- * @bh: The buffer to copy to or clear
- * @buf: The buffer to copy from
- * @offset: The offset in the buffer to write to
- * @size: The amount of data to write
- *
- * Returns: errno
- */
-
-int gfs2_copy_from_mem(struct gfs2_inode *ip, struct buffer_head *bh,
- const char **buf, unsigned int offset, unsigned int size)
-{
- gfs2_trans_add_bh(ip->i_gl, bh, 1);
- memcpy(bh->b_data + offset, *buf, size);
-
- *buf += size;
-
- return 0;
-}
-
-/**
- * gfs2_copy_from_user - Copy bytes from user space for gfs2_jdata_write()
- * @bh: The buffer to copy to or clear
- * @buf: The buffer to copy from
- * @offset: The offset in the buffer to write to
- * @size: The amount of data to write
- *
- * Returns: errno
- */
-
-int gfs2_copy_from_user(struct gfs2_inode *ip, struct buffer_head *bh,
- const char __user **buf, unsigned int offset, unsigned int size)
-{
- int error = 0;
-
- gfs2_trans_add_bh(ip->i_gl, bh, 1);
- if (copy_from_user(bh->b_data + offset, *buf, size))
- error = -EFAULT;
- else
- *buf += size;
-
- return error;
-}
-
-static int jdata_write_stuffed(struct gfs2_inode *ip, char *buf,
- unsigned int offset, unsigned int size,
- write_copy_fn_t copy_fn)
-{
- struct buffer_head *dibh;
- int error;
-
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (error)
- return error;
-
- error = copy_fn(ip,
- dibh, &buf,
- offset + sizeof(struct gfs2_dinode), size);
- if (!error) {
- if (ip->i_di.di_size < offset + size)
- ip->i_di.di_size = offset + size;
- ip->i_di.di_mtime = ip->i_di.di_ctime = get_seconds();
- gfs2_dinode_out(&ip->i_di, dibh->b_data);
- }
-
- brelse(dibh);
-
- return (error) ? error : size;
-}
-
-/**
- * gfs2_jdata_write - Write bytes to a file
- * @ip: The GFS2 inode
- * @buf: The buffer containing information to be written
- * @offset: The file offset to start writing at
- * @size: The amount of data to write
- * @copy_fn: Function to do the actual copying
- *
- * Returns: The number of bytes correctly written or error code
- */
-
-int gfs2_jdata_write(struct gfs2_inode *ip, const char __user *buf, uint64_t offset,
- unsigned int size, write_copy_fn_t copy_fn)
-{
- struct gfs2_sbd *sdp = ip->i_sbd;
- struct buffer_head *dibh;
- uint64_t lblock, dblock;
- uint32_t extlen = 0;
- unsigned int o;
- int copied = 0;
- int error = 0;
-
- if (!size)
- return 0;
-
- if (gfs2_is_stuffed(ip) &&
- offset + size <= sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode))
- return jdata_write_stuffed(ip, buf, (unsigned int)offset, size,
- copy_fn);
-
- if (gfs2_assert_warn(sdp, gfs2_is_jdata(ip)))
- return -EINVAL;
-
- if (gfs2_is_stuffed(ip)) {
- error = gfs2_unstuff_dinode(ip, NULL, NULL);
- if (error)
- return error;
- }
-
- lblock = offset;
- o = do_div(lblock, sdp->sd_jbsize) + sizeof(struct gfs2_meta_header);
-
- while (copied < size) {
- unsigned int amount;
- struct buffer_head *bh;
- int new;
-
- amount = size - copied;
- if (amount > sdp->sd_sb.sb_bsize - o)
- amount = sdp->sd_sb.sb_bsize - o;
-
- if (!extlen) {
- new = 1;
- error = gfs2_block_map(ip, lblock, &new,
- &dblock, &extlen);
- if (error)
- goto fail;
- error = -EIO;
- if (gfs2_assert_withdraw(sdp, dblock))
- goto fail;
- }
-
- error = gfs2_jdata_get_buffer(ip, dblock,
- (amount == sdp->sd_jbsize) ? 1 : new,
- &bh);
- if (error)
- goto fail;
-
- error = copy_fn(ip, bh, &buf, o, amount);
- brelse(bh);
- if (error)
- goto fail;
-
- copied += amount;
- lblock++;
- dblock++;
- extlen--;
-
- o = sizeof(struct gfs2_meta_header);
- }
-
- out:
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (error)
- return error;
-
- if (ip->i_di.di_size < offset + copied)
- ip->i_di.di_size = offset + copied;
- ip->i_di.di_mtime = ip->i_di.di_ctime = get_seconds();
-
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(&ip->i_di, dibh->b_data);
- brelse(dibh);
-
- return copied;
-
- fail:
- if (copied)
- goto out;
- return error;
-}
-