543ade1fc9
This patch cleans up generic_file_*_read/write() interfaces. Christoph Hellwig gave me the idea for this clean ups. In a nutshell, all filesystems should set .aio_read/.aio_write methods and use do_sync_read/ do_sync_write() as their .read/.write methods. This allows us to cleanup all variants of generic_file_* routines. Final available interfaces: generic_file_aio_read() - read handler generic_file_aio_write() - write handler generic_file_aio_write_nolock() - no lock write handler __generic_file_aio_write_nolock() - internal worker routine Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
/*
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* linux/fs/sysv/file.c
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*
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* minix/file.c
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* Copyright (C) 1991, 1992 Linus Torvalds
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*
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* coh/file.c
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* Copyright (C) 1993 Pascal Haible, Bruno Haible
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*
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* sysv/file.c
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* Copyright (C) 1993 Bruno Haible
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*
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* SystemV/Coherent regular file handling primitives
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*/
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#include "sysv.h"
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/*
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* We have mostly NULLs here: the current defaults are OK for
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* the coh filesystem.
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*/
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const struct file_operations sysv_file_operations = {
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.llseek = generic_file_llseek,
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.read = do_sync_read,
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.aio_read = generic_file_aio_read,
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.write = do_sync_write,
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.aio_write = generic_file_aio_write,
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.mmap = generic_file_mmap,
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.fsync = sysv_sync_file,
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.sendfile = generic_file_sendfile,
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};
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struct inode_operations sysv_file_inode_operations = {
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.truncate = sysv_truncate,
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.getattr = sysv_getattr,
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};
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int sysv_sync_file(struct file * file, struct dentry *dentry, int datasync)
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{
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struct inode *inode = dentry->d_inode;
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int err;
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err = sync_mapping_buffers(inode->i_mapping);
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if (!(inode->i_state & I_DIRTY))
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return err;
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if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
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return err;
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err |= sysv_sync_inode(inode);
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return err ? -EIO : 0;
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}
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