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9p: fold v9fs_file_write_internal() into the caller 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2015-04-01 22:04:46 -04:00
parent 371098c6a6
commit c711a6b111
2 changed files with 30 additions and 49 deletions
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2
fs/9p/v9fs_vfs.h
View File

@ -74,8 +74,6 @@ void v9fs_blank_wstat(struct p9_wstat *wstat);
int v9fs_vfs_setattr_dotl(struct dentry *, struct iattr *);
int v9fs_file_fsync_dotl(struct file *filp, loff_t start, loff_t end,
int datasync);
ssize_t v9fs_file_write_internal(struct inode *, struct p9_fid *,
const char __user *, size_t, loff_t *, int);
int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode);
int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode);
static inline void v9fs_invalidate_inode_attr(struct inode *inode)

77
fs/9p/vfs_file.c
View File

@ -453,40 +453,6 @@ v9fs_file_read(struct file *filp, char __user *udata, size_t count,
return ret;
}
ssize_t
v9fs_file_write_internal(struct inode *inode, struct p9_fid *fid,
const char __user *data, size_t count,
loff_t *offset, int invalidate)
{
loff_t origin = *offset;
struct iovec iov = {.iov_base = (void __user *)data, .iov_len = count};
struct iov_iter from;
int total, err = 0;
p9_debug(P9_DEBUG_VFS, "data %p count %d offset %x\n",
data, (int)count, (int)*offset);
iov_iter_init(&from, WRITE, &iov, 1, count);
total = p9_client_write(fid, origin, &from, &err);
if (invalidate && (total > 0)) {
loff_t i_size;
unsigned long pg_start, pg_end;
pg_start = origin >> PAGE_CACHE_SHIFT;
pg_end = (origin + total - 1) >> PAGE_CACHE_SHIFT;
if (inode->i_mapping && inode->i_mapping->nrpages)
invalidate_inode_pages2_range(inode->i_mapping,
pg_start, pg_end);
*offset += total;
i_size = i_size_read(inode);
if (*offset > i_size) {
inode_add_bytes(inode, *offset - i_size);
i_size_write(inode, *offset);
}
}
return total ? total : err;
}
/**
* v9fs_file_write - write to a file
* @filp: file pointer to write
@ -501,27 +467,44 @@ v9fs_file_write(struct file *filp, const char __user * data,
{
ssize_t retval = 0;
loff_t origin = *offset;
struct iovec iov = {.iov_base = (void __user *)data, .iov_len = count};
struct iov_iter from;
int err = 0;
iov_iter_init(&from, WRITE, &iov, 1, count);
retval = generic_write_checks(filp, &origin, &count, 0);
if (retval)
goto out;
return retval;
iov_iter_truncate(&from, count);
p9_debug(P9_DEBUG_VFS, "data %p count %d offset %x\n",
data, (int)count, (int)*offset);
retval = -EINVAL;
if ((ssize_t) count < 0)
goto out;
retval = 0;
if (!count)
goto out;
return 0;
retval = v9fs_file_write_internal(file_inode(filp),
filp->private_data,
data, count, &origin, 1);
/* update offset on successful write */
if (retval > 0)
*offset = origin;
out:
return retval;
retval = p9_client_write(filp->private_data, origin, &from, &err);
if (retval > 0) {
struct inode *inode = file_inode(filp);
loff_t i_size;
unsigned long pg_start, pg_end;
pg_start = origin >> PAGE_CACHE_SHIFT;
pg_end = (origin + retval - 1) >> PAGE_CACHE_SHIFT;
if (inode->i_mapping && inode->i_mapping->nrpages)
invalidate_inode_pages2_range(inode->i_mapping,
pg_start, pg_end);
*offset += retval;
i_size = i_size_read(inode);
if (*offset > i_size) {
inode_add_bytes(inode, *offset - i_size);
i_size_write(inode, *offset);
}
return retval;
}
return err;
}