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Diffstat (limited to 'fs/gfs2/ops_address.c')
-rw-r--r--fs/gfs2/ops_address.c260
1 files changed, 169 insertions, 91 deletions
diff --git a/fs/gfs2/ops_address.c b/fs/gfs2/ops_address.c
index d611b2ad2e97..b14357e89421 100644
--- a/fs/gfs2/ops_address.c
+++ b/fs/gfs2/ops_address.c
@@ -20,13 +20,13 @@
#include "bmap.h"
#include "glock.h"
#include "inode.h"
-#include "jdata.h"
#include "log.h"
#include "meta_io.h"
#include "ops_address.h"
#include "page.h"
#include "quota.h"
#include "trans.h"
+#include "rgrp.h"
/**
* gfs2_get_block - Fills in a buffer head with details about a block
@@ -149,33 +149,55 @@ static int get_blocks_noalloc(struct inode *inode, sector_t lblock,
*
* Returns: errno
*
- * Use Linux VFS block_write_full_page() to write one page,
- * using GFS2's get_block_noalloc to find which blocks to write.
+ * Some of this is copied from block_write_full_page() although we still
+ * call it to do most of the work.
*/
static int gfs2_writepage(struct page *page, struct writeback_control *wbc)
{
+ struct inode *inode = page->mapping->host;
struct gfs2_inode *ip = get_v2ip(page->mapping->host);
struct gfs2_sbd *sdp = ip->i_sbd;
+ loff_t i_size = i_size_read(inode);
+ pgoff_t end_index = i_size >> PAGE_CACHE_SHIFT;
+ unsigned offset;
int error;
+ int done_trans = 0;
atomic_inc(&sdp->sd_ops_address);
-
if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(ip->i_gl))) {
unlock_page(page);
return -EIO;
}
- if (get_transaction) {
- redirty_page_for_writepage(wbc, page);
+ if (get_transaction)
+ goto out_ignore;
+
+ /* Is the page fully outside i_size? (truncate in progress) */
+ offset = i_size & (PAGE_CACHE_SIZE-1);
+ if (page->index >= end_index+1 || !offset) {
+ page->mapping->a_ops->invalidatepage(page, 0);
unlock_page(page);
- return 0;
+ return 0; /* don't care */
}
- error = block_write_full_page(page, get_block_noalloc, wbc);
+ if (sdp->sd_args.ar_data == GFS2_DATA_ORDERED || gfs2_is_jdata(ip)) {
+ error = gfs2_trans_begin(sdp, RES_DINODE + 1, 0);
+ if (error)
+ goto out_ignore;
+ gfs2_page_add_databufs(ip, page, 0, sdp->sd_vfs->s_blocksize-1);
+ done_trans = 1;
+ }
+ error = block_write_full_page(page, get_block_noalloc, wbc);
+ if (done_trans)
+ gfs2_trans_end(sdp);
gfs2_meta_cache_flush(ip);
-
return error;
+
+out_ignore:
+ redirty_page_for_writepage(wbc, page);
+ unlock_page(page);
+ return 0;
}
/**
@@ -227,40 +249,9 @@ static int zero_readpage(struct page *page)
}
/**
- * jdata_readpage - readpage that goes through gfs2_jdata_read_mem()
- * @ip:
- * @page: The page to read
- *
- * Returns: errno
- */
-
-static int jdata_readpage(struct gfs2_inode *ip, struct page *page)
-{
- void *kaddr;
- int ret;
-
- kaddr = kmap(page);
-
- ret = gfs2_jdata_read_mem(ip, kaddr,
- (uint64_t)page->index << PAGE_CACHE_SHIFT,
- PAGE_CACHE_SIZE);
- if (ret >= 0) {
- if (ret < PAGE_CACHE_SIZE)
- memset(kaddr + ret, 0, PAGE_CACHE_SIZE - ret);
- SetPageUptodate(page);
- ret = 0;
- }
-
- kunmap(page);
-
- unlock_page(page);
-
- return ret;
-}
-
-/**
* gfs2_readpage - readpage with locking
- * @file: The file to read a page for
+ * @file: The file to read a page for. N.B. This may be NULL if we are
+ * reading an internal file.
* @page: The page to read
*
* Returns: errno
@@ -270,31 +261,35 @@ static int gfs2_readpage(struct file *file, struct page *page)
{
struct gfs2_inode *ip = get_v2ip(page->mapping->host);
struct gfs2_sbd *sdp = ip->i_sbd;
+ struct gfs2_holder gh;
int error;
atomic_inc(&sdp->sd_ops_address);
- if (gfs2_assert_warn(sdp, gfs2_glock_is_locked_by_me(ip->i_gl))) {
- unlock_page(page);
- return -EOPNOTSUPP;
- }
+ gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh);
+ error = gfs2_glock_nq_m_atime(1, &gh);
+ if (error)
+ goto out_unlock;
- if (!gfs2_is_jdata(ip)) {
- if (gfs2_is_stuffed(ip)) {
- if (!page->index) {
- error = stuffed_readpage(ip, page);
- unlock_page(page);
- } else
- error = zero_readpage(page);
+ if (gfs2_is_stuffed(ip)) {
+ if (!page->index) {
+ error = stuffed_readpage(ip, page);
+ unlock_page(page);
} else
- error = mpage_readpage(page, gfs2_get_block);
+ error = zero_readpage(page);
} else
- error = jdata_readpage(ip, page);
+ error = mpage_readpage(page, gfs2_get_block);
if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
error = -EIO;
+ gfs2_glock_dq_m(1, &gh);
+ gfs2_holder_uninit(&gh);
+out:
return error;
+out_unlock:
+ unlock_page(page);
+ goto out;
}
/**
@@ -312,28 +307,82 @@ static int gfs2_prepare_write(struct file *file, struct page *page,
{
struct gfs2_inode *ip = get_v2ip(page->mapping->host);
struct gfs2_sbd *sdp = ip->i_sbd;
+ unsigned int data_blocks, ind_blocks, rblocks;
+ int alloc_required;
int error = 0;
+ loff_t pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + from;
+ loff_t end = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
+ struct gfs2_alloc *al;
atomic_inc(&sdp->sd_ops_address);
- if (gfs2_assert_warn(sdp, gfs2_glock_is_locked_by_me(ip->i_gl)))
- return -EOPNOTSUPP;
+ gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ATIME, &ip->i_gh);
+ error = gfs2_glock_nq_m_atime(1, &ip->i_gh);
+ if (error)
+ goto out_uninit;
- if (gfs2_is_stuffed(ip)) {
- uint64_t file_size;
- file_size = ((uint64_t)page->index << PAGE_CACHE_SHIFT) + to;
+ gfs2_write_calc_reserv(ip, to - from, &data_blocks, &ind_blocks);
+
+ error = gfs2_write_alloc_required(ip, pos, from - to, &alloc_required);
+ if (error)
+ goto out_unlock;
- if (file_size > sdp->sd_sb.sb_bsize -
- sizeof(struct gfs2_dinode)) {
- error = gfs2_unstuff_dinode(ip, gfs2_unstuffer_page,
- page);
- if (!error)
- error = block_prepare_write(page, from, to,
- gfs2_get_block);
- } else if (!PageUptodate(page))
+
+ if (alloc_required) {
+ al = gfs2_alloc_get(ip);
+
+ error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
+ if (error)
+ goto out_alloc_put;
+
+ error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
+ if (error)
+ goto out_qunlock;
+
+ al->al_requested = data_blocks + ind_blocks;
+ error = gfs2_inplace_reserve(ip);
+ if (error)
+ goto out_qunlock;
+ }
+
+ rblocks = RES_DINODE + ind_blocks;
+ if (gfs2_is_jdata(ip))
+ rblocks += data_blocks ? data_blocks : 1;
+ if (ind_blocks || data_blocks)
+ rblocks += RES_STATFS + RES_QUOTA;
+
+ error = gfs2_trans_begin(sdp, rblocks, 0);
+ if (error)
+ goto out;
+
+ if (gfs2_is_stuffed(ip)) {
+ if (end > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode)) {
+ error = gfs2_unstuff_dinode(ip, gfs2_unstuffer_page, page);
+ if (error)
+ goto out;
+ } else if (!PageUptodate(page)) {
error = stuffed_readpage(ip, page);
- } else
- error = block_prepare_write(page, from, to, gfs2_get_block);
+ goto out;
+ }
+ }
+
+ error = block_prepare_write(page, from, to, gfs2_get_block);
+
+out:
+ if (error) {
+ gfs2_trans_end(sdp);
+ if (alloc_required) {
+ gfs2_inplace_release(ip);
+out_qunlock:
+ gfs2_quota_unlock(ip);
+out_alloc_put:
+ gfs2_alloc_put(ip);
+ }
+out_unlock:
+ gfs2_glock_dq_m(1, &ip->i_gh);
+out_uninit:
+ gfs2_holder_uninit(&ip->i_gh);
+ }
return error;
}
@@ -354,48 +403,73 @@ static int gfs2_commit_write(struct file *file, struct page *page,
struct inode *inode = page->mapping->host;
struct gfs2_inode *ip = get_v2ip(inode);
struct gfs2_sbd *sdp = ip->i_sbd;
- int error;
+ int error = -EOPNOTSUPP;
+ struct buffer_head *dibh;
+ struct gfs2_alloc *al = &ip->i_alloc;;
atomic_inc(&sdp->sd_ops_address);
+
+ if (gfs2_assert_withdraw(sdp, gfs2_glock_is_locked_by_me(ip->i_gl)))
+ goto fail_nounlock;
+
+ error = gfs2_meta_inode_buffer(ip, &dibh);
+ if (error)
+ goto fail_endtrans;
+
+ gfs2_trans_add_bh(ip->i_gl, dibh, 1);
+
if (gfs2_is_stuffed(ip)) {
- struct buffer_head *dibh;
uint64_t file_size;
void *kaddr;
file_size = ((uint64_t)page->index << PAGE_CACHE_SHIFT) + to;
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (error)
- goto fail;
-
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
-
- kaddr = kmap(page);
+ kaddr = kmap_atomic(page, KM_USER0);
memcpy(dibh->b_data + sizeof(struct gfs2_dinode) + from,
- (char *)kaddr + from,
- to - from);
- kunmap(page);
-
- brelse(dibh);
+ (char *)kaddr + from, to - from);
+ kunmap_atomic(page, KM_USER0);
SetPageUptodate(page);
if (inode->i_size < file_size)
i_size_write(inode, file_size);
} else {
- if (sdp->sd_args.ar_data == GFS2_DATA_ORDERED)
+ if (sdp->sd_args.ar_data == GFS2_DATA_ORDERED || gfs2_is_jdata(ip))
gfs2_page_add_databufs(ip, page, from, to);
error = generic_commit_write(file, page, from, to);
if (error)
goto fail;
}
+ if (ip->i_di.di_size < inode->i_size)
+ ip->i_di.di_size = inode->i_size;
+
+ gfs2_dinode_out(&ip->i_di, dibh->b_data);
+ brelse(dibh);
+ gfs2_trans_end(sdp);
+ if (al->al_requested) {
+ gfs2_inplace_release(ip);
+ gfs2_quota_unlock(ip);
+ gfs2_alloc_put(ip);
+ }
+ gfs2_glock_dq_m(1, &ip->i_gh);
+ gfs2_holder_uninit(&ip->i_gh);
return 0;
- fail:
+fail:
+ brelse(dibh);
+fail_endtrans:
+ gfs2_trans_end(sdp);
+ if (al->al_requested) {
+ gfs2_inplace_release(ip);
+ gfs2_quota_unlock(ip);
+ gfs2_alloc_put(ip);
+ }
+ gfs2_glock_dq_m(1, &ip->i_gh);
+ gfs2_holder_uninit(&ip->i_gh);
+fail_nounlock:
ClearPageUptodate(page);
-
return error;
}
@@ -492,12 +566,16 @@ static ssize_t gfs2_direct_IO(int rw, struct kiocb *iocb, const struct iovec *io
atomic_inc(&sdp->sd_ops_address);
- if (gfs2_assert_warn(sdp, gfs2_glock_is_locked_by_me(ip->i_gl)) ||
- gfs2_assert_warn(sdp, !gfs2_is_stuffed(ip)))
+ if (gfs2_is_jdata(ip))
return -EINVAL;
- if (rw == WRITE && !get_transaction)
- gb = get_blocks_noalloc;
+ if (rw == WRITE) {
+ return -EOPNOTSUPP; /* for now */
+ } else {
+ if (gfs2_assert_warn(sdp, gfs2_glock_is_locked_by_me(ip->i_gl)) ||
+ gfs2_assert_warn(sdp, !gfs2_is_stuffed(ip)))
+ return -EINVAL;
+ }
return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
offset, nr_segs, gb, NULL);