[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: 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>

diff --git a/drivers/char/raw.c b/drivers/char/raw.c
index 490db53..89b718e 100644 (file)
--- a/drivers/char/raw.c
+++ b/drivers/char/raw.c
@@ -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,

diff --git a/fs/adfs/file.c b/fs/adfs/file.c
index 1014b9f..6101ea6 100644 (file)
--- a/fs/adfs/file.c
+++ b/fs/adfs/file.c
@@ -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,
 };
 

diff --git a/fs/affs/file.c b/fs/affs/file.c
index 3de8590..05b5e22 100644 (file)
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -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,

diff --git a/fs/bfs/file.c b/fs/bfs/file.c
index 3d5aca2..a9164a8 100644 (file)
--- a/fs/bfs/file.c
+++ b/fs/bfs/file.c
@@ -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,
 };

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 0f14309..bc8f27c 100644 (file)
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -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,

diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index e893e2b..2dba473 100644 (file)
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -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,

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 5c4fcd1..1836268 100644 (file)
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -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,

diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index d05641c..02f5573 100644 (file)
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -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,

diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index 0eb1a60..9e36752 100644 (file)
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -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,

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 4908c38..b6bd33c 100644 (file)
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -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,

diff --git a/fs/hpfs/file.c b/fs/hpfs/file.c
index d9eb19b..8b94d24 100644 (file)
--- a/fs/hpfs/file.c
+++ b/fs/hpfs/file.c
@@ -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,

diff --git a/fs/jffs/inode-v23.c b/fs/jffs/inode-v23.c
index f5cf9c9..068ef0d 100644 (file)
--- a/fs/jffs/inode-v23.c
+++ b/fs/jffs/inode-v23.c
@@ -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,

diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c
index 3ed6e3e..242875f 100644 (file)
--- a/fs/jffs2/file.c
+++ b/fs/jffs2/file.c
@@ -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,

diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index f535f29..976e90d 100644 (file)
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -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,

diff --git a/fs/minix/file.c b/fs/minix/file.c
index 420b328..40eac2e 100644 (file)
--- a/fs/minix/file.c
+++ b/fs/minix/file.c
@@ -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,

diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index 2f9b5a0..ae2fe00 100644 (file)
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -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. */

diff --git a/fs/qnx4/file.c b/fs/qnx4/file.c
index 62af4b1..467e5ac 100644 (file)
--- a/fs/qnx4/file.c
+++ b/fs/qnx4/file.c
@@ -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
 };

diff --git a/fs/ramfs/file-mmu.c b/fs/ramfs/file-mmu.c
index 86f14ca..0947fb5 100644 (file)
--- a/fs/ramfs/file-mmu.c
+++ b/fs/ramfs/file-mmu.c
@@ -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,

diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c
index 677139b..bfe5dbf 100644 (file)
--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -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,

diff --git a/fs/read_write.c b/fs/read_write.c
index 32d54cc..4ed839b 100644 (file)
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -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,
 };

diff --git a/fs/smbfs/file.c b/fs/smbfs/file.c
index dae6704..50784d1 100644 (file)
--- a/fs/smbfs/file.c
+++ b/fs/smbfs/file.c
@@ -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,

diff --git a/fs/sysv/file.c b/fs/sysv/file.c
index a59e303..47a4b72 100644 (file)
--- a/fs/sysv/file.c
+++ b/fs/sysv/file.c
@@ -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,

diff --git a/fs/udf/file.c b/fs/udf/file.c
index a59e5f3..7aedd55 100644 (file)
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -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,

diff --git a/fs/ufs/file.c b/fs/ufs/file.c
index a9c6e5f..1e09632 100644 (file)
--- a/fs/ufs/file.c
+++ b/fs/ufs/file.c
@@ -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,

diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 55992b4..fa842f1 100644 (file)
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -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)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index afb6e6f..011129f 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -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 *,

diff --git a/mm/filemap.c b/mm/filemap.c
index 4849709..ec46923 100644 (file)
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -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.