diff options
Diffstat (limited to 'fs/gfs2/ops_vm.c')
| -rw-r--r-- | fs/gfs2/ops_vm.c | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/fs/gfs2/ops_vm.c b/fs/gfs2/ops_vm.c deleted file mode 100644 index 45a5f11fc39..00000000000 --- a/fs/gfs2/ops_vm.c +++ /dev/null @@ -1,184 +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 version 2. - */ - -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/spinlock.h> -#include <linux/completion.h> -#include <linux/buffer_head.h> -#include <linux/mm.h> -#include <linux/pagemap.h> -#include <linux/gfs2_ondisk.h> -#include <linux/lm_interface.h> - -#include "gfs2.h" -#include "incore.h" -#include "bmap.h" -#include "glock.h" -#include "inode.h" -#include "ops_vm.h" -#include "quota.h" -#include "rgrp.h" -#include "trans.h" -#include "util.h" - -static void pfault_be_greedy(struct gfs2_inode *ip) -{ - unsigned int time; - - spin_lock(&ip->i_spin); - time = ip->i_greedy; - ip->i_last_pfault = jiffies; - spin_unlock(&ip->i_spin); - - igrab(&ip->i_inode); - if (gfs2_glock_be_greedy(ip->i_gl, time)) - iput(&ip->i_inode); -} - -static struct page *gfs2_private_nopage(struct vm_area_struct *area, - unsigned long address, int *type) -{ - struct gfs2_inode *ip = GFS2_I(area->vm_file->f_mapping->host); - struct page *result; - - set_bit(GIF_PAGED, &ip->i_flags); - - result = filemap_nopage(area, address, type); - - if (result && result != NOPAGE_OOM) - pfault_be_greedy(ip); - - return result; -} - -static int alloc_page_backing(struct gfs2_inode *ip, struct page *page) -{ - struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); - unsigned long index = page->index; - u64 lblock = index << (PAGE_CACHE_SHIFT - - sdp->sd_sb.sb_bsize_shift); - unsigned int blocks = PAGE_CACHE_SIZE >> sdp->sd_sb.sb_bsize_shift; - struct gfs2_alloc *al; - unsigned int data_blocks, ind_blocks; - unsigned int x; - int error; - - al = gfs2_alloc_get(ip); - - error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); - if (error) - goto out; - - error = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid); - if (error) - goto out_gunlock_q; - - gfs2_write_calc_reserv(ip, PAGE_CACHE_SIZE, &data_blocks, &ind_blocks); - - al->al_requested = data_blocks + ind_blocks; - - error = gfs2_inplace_reserve(ip); - if (error) - goto out_gunlock_q; - - error = gfs2_trans_begin(sdp, al->al_rgd->rd_ri.ri_length + - ind_blocks + RES_DINODE + - RES_STATFS + RES_QUOTA, 0); - if (error) - goto out_ipres; - - if (gfs2_is_stuffed(ip)) { - error = gfs2_unstuff_dinode(ip, NULL); - if (error) - goto out_trans; - } - - for (x = 0; x < blocks; ) { - u64 dblock; - unsigned int extlen; - int new = 1; - - error = gfs2_extent_map(&ip->i_inode, lblock, &new, &dblock, &extlen); - if (error) - goto out_trans; - - lblock += extlen; - x += extlen; - } - - gfs2_assert_warn(sdp, al->al_alloced); - -out_trans: - gfs2_trans_end(sdp); -out_ipres: - gfs2_inplace_release(ip); -out_gunlock_q: - gfs2_quota_unlock(ip); -out: - gfs2_alloc_put(ip); - return error; -} - -static struct page *gfs2_sharewrite_nopage(struct vm_area_struct *area, - unsigned long address, int *type) -{ - struct file *file = area->vm_file; - struct gfs2_file *gf = file->private_data; - struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); - struct gfs2_holder i_gh; - struct page *result = NULL; - unsigned long index = ((address - area->vm_start) >> PAGE_CACHE_SHIFT) + - area->vm_pgoff; - int alloc_required; - int error; - - error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); - if (error) - return NULL; - - set_bit(GIF_PAGED, &ip->i_flags); - set_bit(GIF_SW_PAGED, &ip->i_flags); - - error = gfs2_write_alloc_required(ip, (u64)index << PAGE_CACHE_SHIFT, - PAGE_CACHE_SIZE, &alloc_required); - if (error) - goto out; - - set_bit(GFF_EXLOCK, &gf->f_flags); - result = filemap_nopage(area, address, type); - clear_bit(GFF_EXLOCK, &gf->f_flags); - if (!result || result == NOPAGE_OOM) - goto out; - - if (alloc_required) { - error = alloc_page_backing(ip, result); - if (error) { - page_cache_release(result); - result = NULL; - goto out; - } - set_page_dirty(result); - } - - pfault_be_greedy(ip); -out: - gfs2_glock_dq_uninit(&i_gh); - - return result; -} - -struct vm_operations_struct gfs2_vm_ops_private = { - .nopage = gfs2_private_nopage, -}; - -struct vm_operations_struct gfs2_vm_ops_sharewrite = { - .nopage = gfs2_sharewrite_nopage, -}; - |