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authorEric Van Hensbergen <ericvh@gmail.com>2008-10-13 20:36:16 -0500
committerEric Van Hensbergen <ericvh@gmail.com>2008-10-17 11:04:43 -0500
commitdfb0ec2e13a906ff19a0bbfa9208caab50cfc2e3 (patch)
treec08a73d0da715aa0c2aa47653edfe055dff5c454 /fs/9p
parentfbedadc16e5c888e4df9df3b1757de4993508d35 (diff)
downloadblackbird-op-linux-dfb0ec2e13a906ff19a0bbfa9208caab50cfc2e3.tar.gz
blackbird-op-linux-dfb0ec2e13a906ff19a0bbfa9208caab50cfc2e3.zip
9p: adjust 9p vfs write operation
Currently, the 9p net wire operation ensures that all data is sent by sending multiple packets if the data requested is larger than the msize. This is better handled in the vfs code so that we can simplify wire operations to being concerned with only putting data onto and taking data off of the wire. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'fs/9p')
-rw-r--r--fs/9p/vfs_file.c36
1 files changed, 29 insertions, 7 deletions
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 4d6d7657fb75..3fd28bbafc87 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -205,19 +205,38 @@ static ssize_t
v9fs_file_write(struct file *filp, const char __user * data,
size_t count, loff_t * offset)
{
- int ret;
+ int n, rsize, total = 0;
struct p9_fid *fid;
+ struct p9_client *clnt;
struct inode *inode = filp->f_path.dentry->d_inode;
+ int origin = *offset;
P9_DPRINTK(P9_DEBUG_VFS, "data %p count %d offset %x\n", data,
(int)count, (int)*offset);
fid = filp->private_data;
- ret = p9_client_write(fid, NULL, data, *offset, count);
- if (ret > 0) {
- invalidate_inode_pages2_range(inode->i_mapping, *offset,
- *offset+ret);
- *offset += ret;
+ clnt = fid->clnt;
+
+ rsize = fid->iounit;
+ if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
+ rsize = clnt->msize - P9_IOHDRSZ;
+
+ do {
+ if (count < rsize)
+ rsize = count;
+
+ n = p9_client_write(fid, NULL, data+total, *offset+total,
+ rsize);
+ if (n <= 0)
+ break;
+ count -= n;
+ total += n;
+ } while (count > 0);
+
+ if (total > 0) {
+ invalidate_inode_pages2_range(inode->i_mapping, origin,
+ origin+total);
+ *offset += total;
}
if (*offset > inode->i_size) {
@@ -225,7 +244,10 @@ v9fs_file_write(struct file *filp, const char __user * data,
inode->i_blocks = (inode->i_size + 512 - 1) >> 9;
}
- return ret;
+ if (n < 0)
+ return n;
+
+ return total;
}
static const struct file_operations v9fs_cached_file_operations = {
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