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-rw-r--r--fs/gfs2/file.c104
1 files changed, 69 insertions, 35 deletions
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index b2682e073ee..a9f5cbe45cd 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -545,18 +545,10 @@ static int gfs2_close(struct inode *inode, struct file *file)
/**
* gfs2_fsync - sync the dirty data for a file (across the cluster)
* @file: the file that points to the dentry (we ignore this)
- * @dentry: the dentry that points to the inode to sync
+ * @datasync: set if we can ignore timestamp changes
*
- * The VFS will flush "normal" data for us. We only need to worry
- * about metadata here. For journaled data, we just do a log flush
- * as we can't avoid it. Otherwise we can just bale out if datasync
- * is set. For stuffed inodes we must flush the log in order to
- * ensure that all data is on disk.
- *
- * The call to write_inode_now() is there to write back metadata and
- * the inode itself. It does also try and write the data, but thats
- * (hopefully) a no-op due to the VFS having already called filemap_fdatawrite()
- * for us.
+ * The VFS will flush data for us. We only need to worry
+ * about metadata here.
*
* Returns: errno
*/
@@ -565,22 +557,20 @@ static int gfs2_fsync(struct file *file, int datasync)
{
struct inode *inode = file->f_mapping->host;
int sync_state = inode->i_state & (I_DIRTY_SYNC|I_DIRTY_DATASYNC);
- int ret = 0;
-
- if (gfs2_is_jdata(GFS2_I(inode))) {
- gfs2_log_flush(GFS2_SB(inode), GFS2_I(inode)->i_gl);
- return 0;
- }
+ struct gfs2_inode *ip = GFS2_I(inode);
+ int ret;
- if (sync_state != 0) {
- if (!datasync)
- ret = write_inode_now(inode, 0);
+ if (datasync)
+ sync_state &= ~I_DIRTY_SYNC;
- if (gfs2_is_stuffed(GFS2_I(inode)))
- gfs2_log_flush(GFS2_SB(inode), GFS2_I(inode)->i_gl);
+ if (sync_state) {
+ ret = sync_inode_metadata(inode, 1);
+ if (ret)
+ return ret;
+ gfs2_ail_flush(ip->i_gl);
}
- return ret;
+ return 0;
}
/**
@@ -617,18 +607,51 @@ static ssize_t gfs2_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
return generic_file_aio_write(iocb, iov, nr_segs, pos);
}
-static void empty_write_end(struct page *page, unsigned from,
- unsigned to)
+static int empty_write_end(struct page *page, unsigned from,
+ unsigned to, int mode)
{
- struct gfs2_inode *ip = GFS2_I(page->mapping->host);
+ struct inode *inode = page->mapping->host;
+ struct gfs2_inode *ip = GFS2_I(inode);
+ struct buffer_head *bh;
+ unsigned offset, blksize = 1 << inode->i_blkbits;
+ pgoff_t end_index = i_size_read(inode) >> PAGE_CACHE_SHIFT;
zero_user(page, from, to-from);
mark_page_accessed(page);
- if (!gfs2_is_writeback(ip))
- gfs2_page_add_databufs(ip, page, from, to);
+ if (page->index < end_index || !(mode & FALLOC_FL_KEEP_SIZE)) {
+ if (!gfs2_is_writeback(ip))
+ gfs2_page_add_databufs(ip, page, from, to);
- block_commit_write(page, from, to);
+ block_commit_write(page, from, to);
+ return 0;
+ }
+
+ offset = 0;
+ bh = page_buffers(page);
+ while (offset < to) {
+ if (offset >= from) {
+ set_buffer_uptodate(bh);
+ mark_buffer_dirty(bh);
+ clear_buffer_new(bh);
+ write_dirty_buffer(bh, WRITE);
+ }
+ offset += blksize;
+ bh = bh->b_this_page;
+ }
+
+ offset = 0;
+ bh = page_buffers(page);
+ while (offset < to) {
+ if (offset >= from) {
+ wait_on_buffer(bh);
+ if (!buffer_uptodate(bh))
+ return -EIO;
+ }
+ offset += blksize;
+ bh = bh->b_this_page;
+ }
+ return 0;
}
static int needs_empty_write(sector_t block, struct inode *inode)
@@ -643,7 +666,8 @@ static int needs_empty_write(sector_t block, struct inode *inode)
return !buffer_mapped(&bh_map);
}
-static int write_empty_blocks(struct page *page, unsigned from, unsigned to)
+static int write_empty_blocks(struct page *page, unsigned from, unsigned to,
+ int mode)
{
struct inode *inode = page->mapping->host;
unsigned start, end, next, blksize;
@@ -668,7 +692,9 @@ static int write_empty_blocks(struct page *page, unsigned from, unsigned to)
gfs2_block_map);
if (unlikely(ret))
return ret;
- empty_write_end(page, start, end);
+ ret = empty_write_end(page, start, end, mode);
+ if (unlikely(ret))
+ return ret;
end = 0;
}
start = next;
@@ -682,7 +708,9 @@ static int write_empty_blocks(struct page *page, unsigned from, unsigned to)
ret = __block_write_begin(page, start, end - start, gfs2_block_map);
if (unlikely(ret))
return ret;
- empty_write_end(page, start, end);
+ ret = empty_write_end(page, start, end, mode);
+ if (unlikely(ret))
+ return ret;
}
return 0;
@@ -731,7 +759,7 @@ static int fallocate_chunk(struct inode *inode, loff_t offset, loff_t len,
if (curr == end)
to = end_offset;
- error = write_empty_blocks(page, from, to);
+ error = write_empty_blocks(page, from, to, mode);
if (!error && offset + to > inode->i_size &&
!(mode & FALLOC_FL_KEEP_SIZE)) {
i_size_write(inode, offset + to);
@@ -788,6 +816,7 @@ static long gfs2_fallocate(struct file *file, int mode, loff_t offset,
loff_t bytes, max_bytes;
struct gfs2_alloc *al;
int error;
+ loff_t bsize_mask = ~((loff_t)sdp->sd_sb.sb_bsize - 1);
loff_t next = (offset + len - 1) >> sdp->sd_sb.sb_bsize_shift;
next = (next + 1) << sdp->sd_sb.sb_bsize_shift;
@@ -795,13 +824,15 @@ static long gfs2_fallocate(struct file *file, int mode, loff_t offset,
if (mode & ~FALLOC_FL_KEEP_SIZE)
return -EOPNOTSUPP;
- offset = (offset >> sdp->sd_sb.sb_bsize_shift) <<
- sdp->sd_sb.sb_bsize_shift;
+ offset &= bsize_mask;
len = next - offset;
bytes = sdp->sd_max_rg_data * sdp->sd_sb.sb_bsize / 2;
if (!bytes)
bytes = UINT_MAX;
+ bytes &= bsize_mask;
+ if (bytes == 0)
+ bytes = sdp->sd_sb.sb_bsize;
gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &ip->i_gh);
error = gfs2_glock_nq(&ip->i_gh);
@@ -832,6 +863,9 @@ retry:
if (error) {
if (error == -ENOSPC && bytes > sdp->sd_sb.sb_bsize) {
bytes >>= 1;
+ bytes &= bsize_mask;
+ if (bytes == 0)
+ bytes = sdp->sd_sb.sb_bsize;
goto retry;
}
goto out_qunlock;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-21 21:32:34 +0000