Commit 543ade1f authored by Badari Pulavarty's avatar Badari Pulavarty Committed by Linus Torvalds

[PATCH] Streamline generic_file_* interfaces and filemap cleanups

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: default avatarBadari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent ee0b3e67
......@@ -238,21 +238,10 @@ out:
return err;
}
static ssize_t raw_file_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
struct iovec local_iov = {
.iov_base = (char __user *)buf,
.iov_len = count
};
return generic_file_write_nolock(file, &local_iov, 1, ppos);
}
static const struct file_operations raw_fops = {
.read = generic_file_read,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.write = raw_file_write,
.write = do_sync_write,
.aio_write = generic_file_aio_write_nolock,
.open = raw_open,
.release= raw_release,
......
......@@ -27,10 +27,12 @@
const struct file_operations adfs_file_operations = {
.llseek = generic_file_llseek,
.read = generic_file_read,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.mmap = generic_file_mmap,
.fsync = file_fsync,
.write = generic_file_write,
.write = do_sync_write,
.aio_write = generic_file_aio_write,
.sendfile = generic_file_sendfile,
};
......
......@@ -27,8 +27,10 @@ static int affs_file_release(struct inode *inode, struct file *filp);
const struct file_operations affs_file_operations = {
.llseek = generic_file_llseek,
.read = generic_file_read,
.write = generic_file_write,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.write = do_sync_write,
.aio_write = generic_file_aio_write,
.mmap = generic_file_mmap,
.open = affs_file_open,
.release = affs_file_release,
......
......@@ -19,8 +19,10 @@
const struct file_operations bfs_file_operations = {
.llseek = generic_file_llseek,
.read = generic_file_read,
.write = generic_file_write,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.write = do_sync_write,
.aio_write = generic_file_aio_write,
.mmap = generic_file_mmap,
.sendfile = generic_file_sendfile,
};
......
......@@ -1154,14 +1154,6 @@ static int blkdev_close(struct inode * inode, struct file * filp)
return blkdev_put(bdev);
}
static ssize_t blkdev_file_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
struct iovec local_iov = { .iov_base = (void __user *)buf, .iov_len = count };
return generic_file_write_nolock(file, &local_iov, 1, ppos);
}
static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg)
{
return blkdev_ioctl(file->f_mapping->host, file, cmd, arg);
......@@ -1181,8 +1173,8 @@ const struct file_operations def_blk_fops = {
.open = blkdev_open,
.release = blkdev_close,
.llseek = block_llseek,
.read = generic_file_read,
.write = blkdev_file_write,
.read = do_sync_read,
.write = do_sync_write,
.aio_read = generic_file_aio_read,
.aio_write = generic_file_aio_write_nolock,
.mmap = generic_file_mmap,
......
......@@ -41,8 +41,8 @@ static int ext2_release_file (struct inode * inode, struct file * filp)
*/
const struct file_operations ext2_file_operations = {
.llseek = generic_file_llseek,
.read = generic_file_read,
.write = generic_file_write,
.read = do_sync_read,
.write = do_sync_write,
.aio_read = generic_file_aio_read,
.aio_write = generic_file_aio_write,
.ioctl = ext2_ioctl,
......
......@@ -753,8 +753,10 @@ static int fuse_file_lock(struct file *file, int cmd, struct file_lock *fl)
static const struct file_operations fuse_file_operations = {
.llseek = generic_file_llseek,
.read = generic_file_read,
.write = generic_file_write,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.write = do_sync_write,
.aio_write = generic_file_aio_write,
.mmap = fuse_file_mmap,
.open = fuse_open,
.flush = fuse_flush,
......
......@@ -601,8 +601,10 @@ int hfs_inode_setattr(struct dentry *dentry, struct iattr * attr)
static const struct file_operations hfs_file_operations = {
.llseek = generic_file_llseek,
.read = generic_file_read,
.write = generic_file_write,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.write = do_sync_write,
.aio_write = generic_file_aio_write,
.mmap = generic_file_mmap,
.sendfile = generic_file_sendfile,
.fsync = file_fsync,
......
......@@ -282,8 +282,10 @@ static struct inode_operations hfsplus_file_inode_operations = {
static const struct file_operations hfsplus_file_operations = {
.llseek = generic_file_llseek,
.read = generic_file_read,
.write = generic_file_write,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.write = do_sync_write,
.aio_write = generic_file_aio_write,
.mmap = generic_file_mmap,
.sendfile = generic_file_sendfile,
.fsync = file_fsync,
......
......@@ -385,11 +385,11 @@ int hostfs_fsync(struct file *file, struct dentry *dentry, int datasync)
static const struct file_operations hostfs_file_fops = {
.llseek = generic_file_llseek,
.read = generic_file_read,
.read = do_sync_read,
.sendfile = generic_file_sendfile,
.aio_read = generic_file_aio_read,
.aio_write = generic_file_aio_write,
.write = generic_file_write,
.write = do_sync_write,
.mmap = generic_file_mmap,
.open = hostfs_file_open,
.release = NULL,
......
......@@ -113,7 +113,7 @@ static ssize_t hpfs_file_write(struct file *file, const char __user *buf,
{
ssize_t retval;
retval = generic_file_write(file, buf, count, ppos);
retval = do_sync_write(file, buf, count, ppos);
if (retval > 0)
hpfs_i(file->f_dentry->d_inode)->i_dirty = 1;
return retval;
......@@ -122,8 +122,10 @@ static ssize_t hpfs_file_write(struct file *file, const char __user *buf,
const struct file_operations hpfs_file_ops =
{
.llseek = generic_file_llseek,
.read = generic_file_read,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.write = hpfs_file_write,
.aio_write = generic_file_aio_write,
.mmap = generic_file_mmap,
.release = hpfs_file_release,
.fsync = hpfs_file_fsync,
......
......@@ -1632,8 +1632,10 @@ static const struct file_operations jffs_file_operations =
{
.open = generic_file_open,
.llseek = generic_file_llseek,
.read = generic_file_read,
.write = generic_file_write,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.write = do_sync_write,
.aio_write = generic_file_aio_write,
.ioctl = jffs_ioctl,
.mmap = generic_file_readonly_mmap,
.fsync = jffs_fsync,
......
......@@ -42,8 +42,10 @@ const struct file_operations jffs2_file_operations =
{
.llseek = generic_file_llseek,
.open = generic_file_open,
.read = generic_file_read,
.write = generic_file_write,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.write = do_sync_write,
.aio_write = generic_file_aio_write,
.ioctl = jffs2_ioctl,
.mmap = generic_file_readonly_mmap,
.fsync = jffs2_fsync,
......
......@@ -103,8 +103,8 @@ struct inode_operations jfs_file_inode_operations = {
const struct file_operations jfs_file_operations = {
.open = jfs_open,
.llseek = generic_file_llseek,
.write = generic_file_write,
.read = generic_file_read,
.write = do_sync_write,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.aio_write = generic_file_aio_write,
.mmap = generic_file_mmap,
......
......@@ -17,8 +17,10 @@ int minix_sync_file(struct file *, struct dentry *, int);
const struct file_operations minix_file_operations = {
.llseek = generic_file_llseek,
.read = generic_file_read,
.write = generic_file_write,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.write = do_sync_write,
.aio_write = generic_file_aio_write,
.mmap = generic_file_mmap,
.fsync = minix_sync_file,
.sendfile = generic_file_sendfile,
......
......@@ -2296,7 +2296,7 @@ static int ntfs_file_fsync(struct file *filp, struct dentry *dentry,
const struct file_operations ntfs_file_ops = {
.llseek = generic_file_llseek, /* Seek inside file. */
.read = generic_file_read, /* Read from file. */
.read = do_sync_read, /* Read from file. */
.aio_read = generic_file_aio_read, /* Async read from file. */
#ifdef NTFS_RW
.write = ntfs_file_write, /* Write to file. */
......
......@@ -22,11 +22,13 @@
const struct file_operations qnx4_file_operations =
{
.llseek = generic_file_llseek,
.read = generic_file_read,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.mmap = generic_file_mmap,
.sendfile = generic_file_sendfile,
#ifdef CONFIG_QNX4FS_RW
.write = generic_file_write,
.write = do_sync_write,
.aio_write = generic_file_aio_write,
.fsync = qnx4_sync_file,
#endif
};
......
......@@ -33,8 +33,10 @@ const struct address_space_operations ramfs_aops = {
};
const struct file_operations ramfs_file_operations = {
.read = generic_file_read,
.write = generic_file_write,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.write = do_sync_write,
.aio_write = generic_file_aio_write,
.mmap = generic_file_mmap,
.fsync = simple_sync_file,
.sendfile = generic_file_sendfile,
......
......@@ -36,8 +36,10 @@ const struct address_space_operations ramfs_aops = {
const struct file_operations ramfs_file_operations = {
.mmap = ramfs_nommu_mmap,
.get_unmapped_area = ramfs_nommu_get_unmapped_area,
.read = generic_file_read,
.write = generic_file_write,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.write = do_sync_write,
.aio_write = generic_file_aio_write,
.fsync = simple_sync_file,
.sendfile = generic_file_sendfile,
.llseek = generic_file_llseek,
......
......@@ -22,7 +22,8 @@
const struct file_operations generic_ro_fops = {
.llseek = generic_file_llseek,
.read = generic_file_read,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.mmap = generic_file_readonly_mmap,
.sendfile = generic_file_sendfile,
};
......
......@@ -214,13 +214,15 @@ smb_updatepage(struct file *file, struct page *page, unsigned long offset,
}
static ssize_t
smb_file_read(struct file * file, char __user * buf, size_t count, loff_t *ppos)
smb_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
{
struct file * file = iocb->ki_filp;
struct dentry * dentry = file->f_dentry;
ssize_t status;
VERBOSE("file %s/%s, count=%lu@%lu\n", DENTRY_PATH(dentry),
(unsigned long) count, (unsigned long) *ppos);
(unsigned long) iocb->ki_left, (unsigned long) pos);
status = smb_revalidate_inode(dentry);
if (status) {
......@@ -233,7 +235,7 @@ smb_file_read(struct file * file, char __user * buf, size_t count, loff_t *ppos)
(long)dentry->d_inode->i_size,
dentry->d_inode->i_flags, dentry->d_inode->i_atime);
status = generic_file_read(file, buf, count, ppos);
status = generic_file_aio_read(iocb, iov, nr_segs, pos);
out:
return status;
}
......@@ -317,14 +319,16 @@ const struct address_space_operations smb_file_aops = {
* Write to a file (through the page cache).
*/
static ssize_t
smb_file_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
smb_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
{
struct file * file = iocb->ki_filp;
struct dentry * dentry = file->f_dentry;
ssize_t result;
VERBOSE("file %s/%s, count=%lu@%lu\n",
DENTRY_PATH(dentry),
(unsigned long) count, (unsigned long) *ppos);
(unsigned long) iocb->ki_left, (unsigned long) pos);
result = smb_revalidate_inode(dentry);
if (result) {
......@@ -337,8 +341,8 @@ smb_file_write(struct file *file, const char __user *buf, size_t count, loff_t *
if (result)
goto out;
if (count > 0) {
result = generic_file_write(file, buf, count, ppos);
if (iocb->ki_left > 0) {
result = generic_file_aio_write(iocb, iov, nr_segs, pos);
VERBOSE("pos=%ld, size=%ld, mtime=%ld, atime=%ld\n",
(long) file->f_pos, (long) dentry->d_inode->i_size,
dentry->d_inode->i_mtime, dentry->d_inode->i_atime);
......@@ -402,8 +406,10 @@ smb_file_permission(struct inode *inode, int mask, struct nameidata *nd)
const struct file_operations smb_file_operations =
{
.llseek = remote_llseek,
.read = smb_file_read,
.write = smb_file_write,
.read = do_sync_read,
.aio_read = smb_file_aio_read,
.write = do_sync_write,
.aio_write = smb_file_aio_write,
.ioctl = smb_ioctl,
.mmap = smb_file_mmap,
.open = smb_file_open,
......
......@@ -21,8 +21,10 @@
*/
const struct file_operations sysv_file_operations = {
.llseek = generic_file_llseek,
.read = generic_file_read,
.write = generic_file_write,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.write = do_sync_write,
.aio_write = generic_file_aio_write,
.mmap = generic_file_mmap,
.fsync = sysv_sync_file,
.sendfile = generic_file_sendfile,
......
......@@ -103,19 +103,21 @@ const struct address_space_operations udf_adinicb_aops = {
.commit_write = udf_adinicb_commit_write,
};
static ssize_t udf_file_write(struct file * file, const char __user * buf,
size_t count, loff_t *ppos)
static ssize_t udf_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t ppos)
{
ssize_t retval;
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_dentry->d_inode;
int err, pos;
size_t count = iocb->ki_left;
if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
{
if (file->f_flags & O_APPEND)
pos = inode->i_size;
else
pos = *ppos;
pos = ppos;
if (inode->i_sb->s_blocksize < (udf_file_entry_alloc_offset(inode) +
pos + count))
......@@ -136,7 +138,7 @@ static ssize_t udf_file_write(struct file * file, const char __user * buf,
}
}
retval = generic_file_write(file, buf, count, ppos);
retval = generic_file_aio_write(iocb, iov, nr_segs, ppos);
if (retval > 0)
mark_inode_dirty(inode);
......@@ -249,11 +251,13 @@ static int udf_release_file(struct inode * inode, struct file * filp)
}
const struct file_operations udf_file_operations = {
.read = generic_file_read,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.ioctl = udf_ioctl,
.open = generic_file_open,
.mmap = generic_file_mmap,
.write = udf_file_write,
.write = do_sync_write,
.aio_write = udf_file_aio_write,
.release = udf_release_file,
.fsync = udf_fsync_file,
.sendfile = generic_file_sendfile,
......
......@@ -53,8 +53,10 @@ static int ufs_sync_file(struct file *file, struct dentry *dentry, int datasync)
const struct file_operations ufs_file_operations = {
.llseek = generic_file_llseek,
.read = generic_file_read,
.write = generic_file_write,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.write = do_sync_write,
.aio_write = generic_file_aio_write,
.mmap = generic_file_mmap,
.open = generic_file_open,
.fsync = ufs_sync_file,
......
......@@ -279,7 +279,9 @@ xfs_read(
xfs_rw_enter_trace(XFS_READ_ENTER, &ip->i_iocore,
(void *)iovp, segs, *offset, ioflags);
ret = __generic_file_aio_read(iocb, iovp, segs, offset);
iocb->ki_pos = *offset;
ret = generic_file_aio_read(iocb, iovp, segs, *offset);
if (ret == -EIOCBQUEUED && !(ioflags & IO_ISAIO))
ret = wait_on_sync_kiocb(iocb);
if (ret > 0)
......
......@@ -1699,11 +1699,8 @@ extern int generic_file_mmap(struct file *, struct vm_area_struct *);
extern int generic_file_readonly_mmap(struct file *, struct vm_area_struct *);
extern int file_read_actor(read_descriptor_t * desc, struct page *page, unsigned long offset, unsigned long size);
extern int file_send_actor(read_descriptor_t * desc, struct page *page, unsigned long offset, unsigned long size);
extern ssize_t generic_file_read(struct file *, char __user *, size_t, loff_t *);
int generic_write_checks(struct file *file, loff_t *pos, size_t *count, int isblk);
extern ssize_t generic_file_write(struct file *, const char __user *, size_t, loff_t *);
extern ssize_t generic_file_aio_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
extern ssize_t __generic_file_aio_read(struct kiocb *, const struct iovec *, unsigned long, loff_t *);
extern ssize_t generic_file_aio_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
extern ssize_t generic_file_aio_write_nolock(struct kiocb *, const struct iovec *,
unsigned long, loff_t);
......@@ -1713,8 +1710,6 @@ extern ssize_t generic_file_buffered_write(struct kiocb *, const struct iovec *,
unsigned long, loff_t, loff_t *, size_t, ssize_t);
extern ssize_t do_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos);
extern ssize_t do_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos);
ssize_t generic_file_write_nolock(struct file *file, const struct iovec *iov,
unsigned long nr_segs, loff_t *ppos);
extern ssize_t generic_file_sendfile(struct file *, loff_t *, size_t, read_actor_t, void *);
extern void do_generic_mapping_read(struct address_space *mapping,
struct file_ra_state *, struct file *,
......
......@@ -1149,13 +1149,14 @@ success:
* that can use the page cache directly.
*/
ssize_t
__generic_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t *ppos)
generic_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
{
struct file *filp = iocb->ki_filp;
ssize_t retval;
unsigned long seg;
size_t count;
loff_t *ppos = &iocb->ki_pos;
count = 0;
for (seg = 0; seg < nr_segs; seg++) {
......@@ -1179,7 +1180,7 @@ __generic_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
/* coalesce the iovecs and go direct-to-BIO for O_DIRECT */
if (filp->f_flags & O_DIRECT) {
loff_t pos = *ppos, size;
loff_t size;
struct address_space *mapping;
struct inode *inode;
......@@ -1223,32 +1224,8 @@ __generic_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
out:
return retval;
}
EXPORT_SYMBOL(__generic_file_aio_read);
ssize_t
generic_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
{
BUG_ON(iocb->ki_pos != pos);
return __generic_file_aio_read(iocb, iov, nr_segs, &iocb->ki_pos);
}
EXPORT_SYMBOL(generic_file_aio_read);
ssize_t
generic_file_read(struct file *filp, char __user *buf, size_t count, loff_t *ppos)
{
struct iovec local_iov = { .iov_base = buf, .iov_len = count };
struct kiocb kiocb;
ssize_t ret;
init_sync_kiocb(&kiocb, filp);
ret = __generic_file_aio_read(&kiocb, &local_iov, 1, ppos);
if (-EIOCBQUEUED == ret)
ret = wait_on_sync_kiocb(&kiocb);
return ret;
}
EXPORT_SYMBOL(generic_file_read);
int file_send_actor(read_descriptor_t * desc, struct page *page, unsigned long offset, unsigned long size)
{
ssize_t written;
......@@ -2339,38 +2316,6 @@ ssize_t generic_file_aio_write_nolock(struct kiocb *iocb,
}
EXPORT_SYMBOL(generic_file_aio_write_nolock);
static ssize_t
__generic_file_write_nolock(struct file *file, const struct iovec *iov,
unsigned long nr_segs, loff_t *ppos)
{
struct kiocb kiocb;
ssize_t ret;
init_sync_kiocb(&kiocb, file);
kiocb.ki_pos = *ppos;
ret = __generic_file_aio_write_nolock(&kiocb, iov, nr_segs, ppos);
if (-EIOCBQUEUED == ret)
ret = wait_on_sync_kiocb(&kiocb);
return ret;
}
ssize_t
generic_file_write_nolock(struct file *file, const struct iovec *iov,
unsigned long nr_segs, loff_t *ppos)
{
struct kiocb kiocb;
ssize_t ret;
init_sync_kiocb(&kiocb, file);
kiocb.ki_pos = *ppos;
ret = generic_file_aio_write_nolock(&kiocb, iov, nr_segs, *ppos);
if (-EIOCBQUEUED == ret)
ret = wait_on_sync_kiocb(&kiocb);
*ppos = kiocb.ki_pos;
return ret;
}
EXPORT_SYMBOL(generic_file_write_nolock);
ssize_t generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
{
......@@ -2397,30 +2342,6 @@ ssize_t generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
}
EXPORT_SYMBOL(generic_file_aio_write);
ssize_t generic_file_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
struct address_space *mapping = file->f_mapping;
struct inode *inode = mapping->host;
ssize_t ret;
struct iovec local_iov = { .iov_base = (void __user *)buf,
.iov_len = count };
mutex_lock(&inode->i_mutex);
ret = __generic_file_write_nolock(file, &local_iov, 1, ppos);
mutex_unlock(&inode->i_mutex);
if (ret > 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) {
ssize_t err;
err = sync_page_range(inode, mapping, *ppos - ret, ret);
if (err < 0)
ret = err;
}
return ret;
}
EXPORT_SYMBOL(generic_file_write);
/*
* Called under i_mutex for writes to S_ISREG files. Returns -EIO if something
* went wrong during pagecache shootdown.
......
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