#include "rgrp.h"
#include "trans.h"
#include "util.h"
-#include "eaops.h"
/**
* gfs2_llseek - seek to a location in a file
return ret;
}
-static struct vm_operations_struct gfs2_vm_ops = {
+static const struct vm_operations_struct gfs2_vm_ops = {
.fault = filemap_fault,
.page_mkwrite = gfs2_page_mkwrite,
};
return ret;
}
+/**
+ * gfs2_file_aio_write - Perform a write to a file
+ * @iocb: The io context
+ * @iov: The data to write
+ * @nr_segs: Number of @iov segments
+ * @pos: The file position
+ *
+ * We have to do a lock/unlock here to refresh the inode size for
+ * O_APPEND writes, otherwise we can land up writing at the wrong
+ * offset. There is still a race, but provided the app is using its
+ * own file locking, this will make O_APPEND work as expected.
+ *
+ */
+
+static ssize_t gfs2_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
+ unsigned long nr_segs, loff_t pos)
+{
+ struct file *file = iocb->ki_filp;
+
+ if (file->f_flags & O_APPEND) {
+ struct dentry *dentry = file->f_dentry;
+ struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
+ struct gfs2_holder gh;
+ int ret;
+
+ ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
+ if (ret)
+ return ret;
+ gfs2_glock_dq_uninit(&gh);
+ }
+
+ return generic_file_aio_write(iocb, iov, nr_segs, pos);
+}
+
#ifdef CONFIG_GFS2_FS_LOCKING_DLM
/**
static int gfs2_flock(struct file *file, int cmd, struct file_lock *fl)
{
- struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
-
if (!(fl->fl_flags & FL_FLOCK))
return -ENOLCK;
- if (__mandatory_lock(&ip->i_inode))
- return -ENOLCK;
+ if (fl->fl_type & LOCK_MAND)
+ return -EOPNOTSUPP;
if (fl->fl_type == F_UNLCK) {
do_unflock(file, fl);
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.write = do_sync_write,
- .aio_write = generic_file_aio_write,
+ .aio_write = gfs2_file_aio_write,
.unlocked_ioctl = gfs2_ioctl,
.mmap = gfs2_mmap,
.open = gfs2_open,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.write = do_sync_write,
- .aio_write = generic_file_aio_write,
+ .aio_write = gfs2_file_aio_write,
.unlocked_ioctl = gfs2_ioctl,
.mmap = gfs2_mmap,
.open = gfs2_open,