From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- fs/sysv/file.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 fs/sysv/file.c (limited to 'fs/sysv/file.c') diff --git a/fs/sysv/file.c b/fs/sysv/file.c new file mode 100644 index 000000000..82ddc0906 --- /dev/null +++ b/fs/sysv/file.c @@ -0,0 +1,57 @@ +/* + * linux/fs/sysv/file.c + * + * minix/file.c + * Copyright (C) 1991, 1992 Linus Torvalds + * + * coh/file.c + * Copyright (C) 1993 Pascal Haible, Bruno Haible + * + * sysv/file.c + * Copyright (C) 1993 Bruno Haible + * + * SystemV/Coherent regular file handling primitives + */ + +#include "sysv.h" + +/* + * We have mostly NULLs here: the current defaults are OK for + * the coh filesystem. + */ +const struct file_operations sysv_file_operations = { + .llseek = generic_file_llseek, + .read_iter = generic_file_read_iter, + .write_iter = generic_file_write_iter, + .mmap = generic_file_mmap, + .fsync = generic_file_fsync, + .splice_read = generic_file_splice_read, +}; + +static int sysv_setattr(struct dentry *dentry, struct iattr *attr) +{ + struct inode *inode = d_inode(dentry); + int error; + + error = inode_change_ok(inode, attr); + if (error) + return error; + + if ((attr->ia_valid & ATTR_SIZE) && + attr->ia_size != i_size_read(inode)) { + error = inode_newsize_ok(inode, attr->ia_size); + if (error) + return error; + truncate_setsize(inode, attr->ia_size); + sysv_truncate(inode); + } + + setattr_copy(inode, attr); + mark_inode_dirty(inode); + return 0; +} + +const struct inode_operations sysv_file_inode_operations = { + .setattr = sysv_setattr, + .getattr = sysv_getattr, +}; -- cgit v1.2.3-54-g00ecf