/* capfs_open()
*
* Called from fs/open.c:filep_open()
*
* NOTES:
* Truncation and creation are handled by fs/namei.c:open_namei()
* We need to take care of O_APPEND here.
*
* The inode for the file is not necessarily up to date. This is
* important in the O_APPEND case because we need to have the most
* recent size, so we're going to force a revalidate_inode() in the case
* of an append.
*/
int capfs_open(struct inode *inode, struct file *file)
{
int error = 0;
/* update the statistics */
if(capfs_collect_stats) capfs_vfs_stat.open++;
PENTRY;
lock_kernel();
inode->i_mapping->host = inode;
inode->i_mapping->a_ops = &capfs_file_aops;
inode->i_mapping->backing_dev_info = &capfs_backing_dev_info;
if (S_ISDIR(inode->i_mode))
{
error = dcache_dir_open(inode, file);
unlock_kernel();
return error;
}
/* we need to calculate file size if a) the user wants append mode or
* b) if O_LARGEFILE is not used (so that we can throw an error if
* the file is to large)
*/
if ((file->f_flags & O_APPEND) || !(file->f_flags & O_LARGEFILE))
{
/* force a revalidate */
PDEBUG(D_FILE, "capfs_open: getting most up to date size\n");
if ((error = capfs_inode_getattr(file->f_dentry)) < 0) {
unlock_kernel();
PEXIT;
return error;
}
}
/* make sure the file isn't too large */
if (!(file->f_flags & O_LARGEFILE) && i_size_read(inode) > MAX_NON_LFS)
{
unlock_kernel();
PEXIT;
return -EFBIG;
}
if (file->f_flags & O_APPEND)
{
/* set the file position to point to one byte past the last byte
* in the file
*/
file->f_pos = i_size_read(inode);
}
error = generic_file_open(inode, file);
unlock_kernel();
PEXIT;
return error;
}
int sjfs_dir_fops_open(struct inode *dir, struct file *file) {
printk("sjfs_dir_fops_open -> dcache_dir_open(\n");
if(dir) {
printk("--- dir.ino:%lu\n", dir->i_ino);
} else {
printk("--- dir.ino:NULL\n");
}
if(file && &(file->f_path) != NULL && file->f_path.dentry != NULL && &(file->f_path.dentry->d_name) != NULL && file->f_path.dentry->d_name.name != NULL) {
printk("--- file.path: \"%s\");\n", file->f_path.dentry->d_name.name);
} else {
printk("--- file.path: NULL);\n");
}
return dcache_dir_open(dir, file);
}
