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author | Eric Van Hensbergen <ericvh@gmail.com> | 2008-10-13 20:36:16 -0500 |
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committer | Eric Van Hensbergen <ericvh@gmail.com> | 2008-10-17 11:04:43 -0500 |
commit | dfb0ec2e13a906ff19a0bbfa9208caab50cfc2e3 (patch) | |
tree | c08a73d0da715aa0c2aa47653edfe055dff5c454 /fs/9p/vfs_file.c | |
parent | fbedadc16e5c888e4df9df3b1757de4993508d35 (diff) | |
download | linux-3.10-dfb0ec2e13a906ff19a0bbfa9208caab50cfc2e3.tar.gz linux-3.10-dfb0ec2e13a906ff19a0bbfa9208caab50cfc2e3.tar.bz2 linux-3.10-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/vfs_file.c')
-rw-r--r-- | fs/9p/vfs_file.c | 36 |
1 files changed, 29 insertions, 7 deletions
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c index 4d6d7657fb7..3fd28bbafc8 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 = { |