diff options
Diffstat (limited to 'fs/gfs2/page.c')
| -rw-r--r-- | fs/gfs2/page.c | 207 |
1 files changed, 0 insertions, 207 deletions
diff --git a/fs/gfs2/page.c b/fs/gfs2/page.c deleted file mode 100644 index 0d6befe..0000000 --- a/fs/gfs2/page.c +++ /dev/null @@ -1,207 +0,0 @@ -/* - * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. - * Copyright (C) 2004-2006 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 <linux/pagemap.h> -#include <linux/mm.h> -#include <linux/gfs2_ondisk.h> - -#include "gfs2.h" -#include "lm_interface.h" -#include "incore.h" -#include "bmap.h" -#include "inode.h" -#include "page.h" -#include "trans.h" -#include "ops_address.h" -#include "util.h" - -/** - * gfs2_pte_inval - Sync and invalidate all PTEs associated with a glock - * @gl: the glock - * - */ - -void gfs2_pte_inval(struct gfs2_glock *gl) -{ - struct gfs2_inode *ip; - struct inode *inode; - - ip = gl->gl_object; - inode = &ip->i_inode; - if (!ip || !S_ISREG(ip->i_di.di_mode)) - return; - - if (!test_bit(GIF_PAGED, &ip->i_flags)) - return; - - unmap_shared_mapping_range(inode->i_mapping, 0, 0); - - if (test_bit(GIF_SW_PAGED, &ip->i_flags)) - set_bit(GLF_DIRTY, &gl->gl_flags); - - clear_bit(GIF_SW_PAGED, &ip->i_flags); -} - -/** - * gfs2_page_inval - Invalidate all pages associated with a glock - * @gl: the glock - * - */ - -void gfs2_page_inval(struct gfs2_glock *gl) -{ - struct gfs2_inode *ip; - struct inode *inode; - - ip = gl->gl_object; - inode = &ip->i_inode; - if (!ip || !S_ISREG(ip->i_di.di_mode)) - return; - - truncate_inode_pages(inode->i_mapping, 0); - gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), !inode->i_mapping->nrpages); - clear_bit(GIF_PAGED, &ip->i_flags); -} - -/** - * gfs2_page_sync - Sync the data pages (not metadata) associated with a glock - * @gl: the glock - * @flags: DIO_START | DIO_WAIT - * - * Syncs data (not metadata) for a regular file. - * No-op for all other types. - */ - -void gfs2_page_sync(struct gfs2_glock *gl, int flags) -{ - struct gfs2_inode *ip; - struct inode *inode; - struct address_space *mapping; - int error = 0; - - ip = gl->gl_object; - inode = &ip->i_inode; - if (!ip || !S_ISREG(ip->i_di.di_mode)) - return; - - mapping = inode->i_mapping; - - if (flags & DIO_START) - filemap_fdatawrite(mapping); - if (!error && (flags & DIO_WAIT)) - error = filemap_fdatawait(mapping); - - /* Put back any errors cleared by filemap_fdatawait() - so they can be caught by someone who can pass them - up to user space. */ - - if (error == -ENOSPC) - set_bit(AS_ENOSPC, &mapping->flags); - else if (error) - set_bit(AS_EIO, &mapping->flags); - -} - -/** - * gfs2_block_truncate_page - Deal with zeroing out data for truncate - * - * This is partly borrowed from ext3. - */ -int gfs2_block_truncate_page(struct address_space *mapping) -{ - struct inode *inode = mapping->host; - struct gfs2_inode *ip = GFS2_I(inode); - struct gfs2_sbd *sdp = GFS2_SB(inode); - loff_t from = inode->i_size; - unsigned long index = from >> PAGE_CACHE_SHIFT; - unsigned offset = from & (PAGE_CACHE_SIZE-1); - unsigned blocksize, iblock, length, pos; - struct buffer_head *bh; - struct page *page; - void *kaddr; - int err; - - page = grab_cache_page(mapping, index); - if (!page) - return 0; - - blocksize = inode->i_sb->s_blocksize; - length = blocksize - (offset & (blocksize - 1)); - iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits); - - if (!page_has_buffers(page)) - create_empty_buffers(page, blocksize, 0); - - /* Find the buffer that contains "offset" */ - bh = page_buffers(page); - pos = blocksize; - while (offset >= pos) { - bh = bh->b_this_page; - iblock++; - pos += blocksize; - } - - err = 0; - - if (!buffer_mapped(bh)) { - gfs2_get_block(inode, iblock, bh, 0); - /* unmapped? It's a hole - nothing to do */ - if (!buffer_mapped(bh)) - goto unlock; - } - - /* Ok, it's mapped. Make sure it's up-to-date */ - if (PageUptodate(page)) - set_buffer_uptodate(bh); - - if (!buffer_uptodate(bh)) { - err = -EIO; - ll_rw_block(READ, 1, &bh); - wait_on_buffer(bh); - /* Uhhuh. Read error. Complain and punt. */ - if (!buffer_uptodate(bh)) - goto unlock; - } - - if (sdp->sd_args.ar_data == GFS2_DATA_ORDERED || gfs2_is_jdata(ip)) - gfs2_trans_add_bh(ip->i_gl, bh, 0); - - kaddr = kmap_atomic(page, KM_USER0); - memset(kaddr + offset, 0, length); - flush_dcache_page(page); - kunmap_atomic(kaddr, KM_USER0); - -unlock: - unlock_page(page); - page_cache_release(page); - return err; -} - -void gfs2_page_add_databufs(struct gfs2_inode *ip, struct page *page, - unsigned int from, unsigned int to) -{ - struct buffer_head *head = page_buffers(page); - unsigned int bsize = head->b_size; - struct buffer_head *bh; - unsigned int start, end; - - for (bh = head, start = 0; bh != head || !start; - bh = bh->b_this_page, start = end) { - end = start + bsize; - if (end <= from || start >= to) - continue; - gfs2_trans_add_bh(ip->i_gl, bh, 0); - } -} - |
