#include <linux/pagemap.h>
#include "smfs_internal.h"
-
static int smfs_readpage(struct file *file,
struct page *page)
{
struct inode *inode = page->mapping->host;
struct inode *cache_inode;
- int rc;
-
+ struct page *cache_page = NULL;
+ int rc = 0;
+
ENTRY;
cache_inode = I2CI(inode);
if (!cache_inode)
RETURN(-ENOENT);
+
+ cache_page = grab_cache_page(cache_inode->i_mapping, page->index);
- if (cache_inode->i_mapping->a_ops->readpage)
- rc = cache_inode->i_mapping->a_ops->readpage(file, page);
-
- RETURN(rc);
+ if (!cache_page)
+ GOTO(exit_release, rc = -ENOMEM);
+
+ if ((rc = cache_inode->i_mapping->a_ops->readpage(file, cache_page)))
+ GOTO(exit_release, 0);
+ wait_on_page(cache_page);
+
+ if (!Page_Uptodate(cache_page))
+ GOTO(exit_release, rc = -EIO);
+
+ memcpy(kmap(page), kmap(cache_page), PAGE_CACHE_SIZE);
+
+ flush_dcache_page(page);
+
+ kunmap(cache_page);
+ page_cache_release(cache_page);
+
+exit:
+ kunmap(page);
+ SetPageUptodate(page);
+ UnlockPage(page);
+
+ RETURN(rc);
+
+exit_release:
+ if (cache_page)
+ page_cache_release(cache_page);
+ UnlockPage(page);
+ RETURN(rc);
}
+
static int smfs_writepage(struct page *page)
{
rc = cache_inode->i_mapping->a_ops->writepage(page);
RETURN(rc);
-
}
+
struct address_space_operations smfs_file_aops = {
readpage: smfs_readpage,
writepage: smfs_writepage,
};
-
+
+/* instantiate a file handle to the cache file */
+void smfs_prepare_cachefile(struct inode *inode,
+ struct file *file,
+ struct inode *cache_inode,
+ struct file *cache_file,
+ struct dentry *cache_dentry)
+{
+ ENTRY;
+ cache_file->f_pos = file->f_pos;
+ cache_file->f_mode = file->f_mode;
+ cache_file->f_flags = file->f_flags;
+ cache_file->f_count = file->f_count;
+ cache_file->f_owner = file->f_owner;
+ cache_file->f_error = file->f_error;
+ cache_file->f_op = inode->i_fop;
+ cache_file->f_dentry = cache_dentry;
+ cache_file->f_dentry->d_inode = cache_inode;
+ cache_file->f_vfsmnt = file->f_vfsmnt;
+ cache_file->private_data = file->private_data;
+ cache_file->f_it = file->f_it;
+ cache_file->f_reada = file->f_reada;
+ cache_file->f_ramax = file->f_ramax;
+ cache_file->f_raend = file->f_raend;
+ cache_file->f_ralen = file->f_ralen;
+ cache_file->f_rawin = file->f_rawin;
+ EXIT;
+}
+/* update file structs*/
+void smfs_update_file(struct file *file,
+ struct file *cache_file)
+{
+ ENTRY;
+ file->f_pos = cache_file->f_pos;
+ file->f_mode = cache_file->f_mode;
+ file->f_flags = cache_file->f_flags;
+ file->f_count = cache_file->f_count;
+ file->f_owner = cache_file->f_owner;
+ file->f_reada = cache_file->f_reada;
+ file->f_ramax = cache_file->f_ramax;
+ file->f_raend = cache_file->f_raend;
+ file->f_ralen = cache_file->f_ralen;
+ file->f_rawin = cache_file->f_rawin;
+ EXIT;
+}
static ssize_t smfs_write (struct file *filp, const char *buf,
size_t count, loff_t *ppos)
{
struct inode *cache_inode;
struct dentry *dentry = filp->f_dentry;
- int rc;
+ struct inode *inode = dentry->d_inode;
+ struct file open_file;
+ struct dentry open_dentry;
+ int rc = 0;
ENTRY;
- cache_inode = I2CI(dentry->d_inode);
+ cache_inode = I2CI(inode);
if (!cache_inode)
RETURN(-ENOENT);
-
+
+ smfs_prepare_cachefile(inode, filp, cache_inode,
+ &open_file, &open_dentry);
+
if (cache_inode->i_fop->write)
- cache_inode->i_fop->write(filp, buf, count, ppos);
+ rc = cache_inode->i_fop->write(&open_file, buf, count, &open_file.f_pos);
+
+ *ppos = open_file.f_pos;
+ duplicate_inode(cache_inode, inode);
+ smfs_update_file(filp, &open_file);
+
+ RETURN(rc);
+}
+int smfs_ioctl(struct inode * inode, struct file * filp,
+ unsigned int cmd, unsigned long arg)
+{
+ struct inode *cache_inode;
+ struct dentry *dentry = filp->f_dentry;
+ struct file open_file;
+ struct dentry open_dentry;
+ ssize_t rc;
+
+ ENTRY;
+
+ cache_inode = I2CI(dentry->d_inode);
+ if (!cache_inode)
+ RETURN(-ENOENT);
+
+ smfs_prepare_cachefile(inode, filp, cache_inode,
+ &open_file, &open_dentry);
+
+ if (cache_inode->i_fop->ioctl)
+ rc = cache_inode->i_fop->ioctl(cache_inode, &open_file, cmd, arg);
+ duplicate_inode(cache_inode, inode);
+ smfs_update_file(filp, &open_file);
RETURN(rc);
}
{
struct inode *cache_inode;
struct dentry *dentry = filp->f_dentry;
+ struct inode *inode = dentry->d_inode;
+ struct file open_file;
+ struct dentry open_dentry;
ssize_t rc;
ENTRY;
cache_inode = I2CI(dentry->d_inode);
-
if (!cache_inode)
RETURN(-ENOENT);
+ smfs_prepare_cachefile(inode, filp, cache_inode,
+ &open_file, &open_dentry);
+
if (cache_inode->i_fop->read)
- rc = cache_inode->i_fop->read(filp, buf, count, ppos);
+ rc = cache_inode->i_fop->read(&open_file, buf, count, &open_file.f_pos);
+
+ *ppos = open_file.f_pos;
+ duplicate_inode(cache_inode, inode);
+ smfs_update_file(filp, &open_file);
+ RETURN(rc);
+}
+
+static loff_t smfs_llseek(struct file *file,
+ loff_t offset,
+ int origin)
+{
+ struct inode *cache_inode;
+ struct dentry *dentry = file->f_dentry;
+ struct file open_file;
+ struct dentry open_dentry;
+ ssize_t rc;
+
+ ENTRY;
+
+ cache_inode = I2CI(dentry->d_inode);
+ if (!cache_inode)
+ RETURN(-ENOENT);
+
+ smfs_prepare_cachefile(dentry->d_inode, file, cache_inode,
+ &open_file, &open_dentry);
+
+ if (cache_inode->i_fop->llseek)
+ rc = cache_inode->i_fop->llseek(&open_file, offset, origin);
+
+ duplicate_inode(cache_inode, dentry->d_inode);
+ smfs_update_file(file, &open_file);
RETURN(rc);
}
+static int smfs_mmap(struct file * file, struct vm_area_struct * vma)
+{
+ struct address_space *mapping = file->f_dentry->d_inode->i_mapping;
+ struct inode *inode = mapping->host;
+ struct inode *cache_inode = NULL;
+ struct file open_file;
+ struct dentry open_dentry;
+ int rc = 0;
+
+ cache_inode = I2CI(inode);
+ if (!cache_inode)
+ RETURN(-ENOENT);
+
+ smfs_prepare_cachefile(inode, file, cache_inode,
+ &open_file, &open_dentry);
+
+ if (cache_inode->i_fop->mmap)
+ rc = cache_inode->i_fop->mmap(&open_file, vma);
+
+ duplicate_inode(cache_inode, inode);
+ smfs_update_file(file, &open_file);
+
+ RETURN(rc);
+}
+
+static int smfs_open(struct inode * inode, struct file * filp)
+{
+ struct inode *cache_inode = NULL;
+ struct file open_file;
+ struct dentry open_dentry;
+ int rc = 0;
+
+ cache_inode = I2CI(inode);
+ if (!cache_inode)
+ RETURN(-ENOENT);
+
+ smfs_prepare_cachefile(inode, filp, cache_inode,
+ &open_file, &open_dentry);
+
+ if (cache_inode->i_fop->open)
+ rc = cache_inode->i_fop->open(cache_inode, &open_file);
+
+ duplicate_inode(cache_inode, inode);
+ smfs_update_file(filp, &open_file);
+
+ RETURN(rc);
+
+}
+static int smfs_release(struct inode * inode, struct file * filp)
+{
+ struct inode *cache_inode = NULL;
+ struct file open_file;
+ struct dentry open_dentry;
+ int rc = 0;
+
+ cache_inode = I2CI(inode);
+ if (!cache_inode)
+ RETURN(-ENOENT);
+
+ smfs_prepare_cachefile(inode, filp, cache_inode,
+ &open_file, &open_dentry);
+
+ if (cache_inode->i_fop->release)
+ rc = cache_inode->i_fop->release(cache_inode, &open_file);
+
+ duplicate_inode(cache_inode, inode);
+ smfs_update_file(filp, &open_file);
+
+ RETURN(rc);
+}
+int smfs_fsync(struct file * file,
+ struct dentry *dentry,
+ int datasync)
+{
+ struct inode *inode = dentry->d_inode;
+ struct inode *cache_inode;
+ struct file open_file;
+ struct dentry open_dentry;
+ int rc = 0;
+
+ cache_inode = I2CI(inode);
+ if (!cache_inode)
+ RETURN(-ENOENT);
+
+ smfs_prepare_cachefile(inode, file, cache_inode,
+ &open_file, &open_dentry);
+
+ if (cache_inode->i_fop->fsync)
+ rc = cache_inode->i_fop->fsync(&open_file, &open_dentry, datasync);
+
+ duplicate_inode(cache_inode, inode);
+ smfs_update_file(file, &open_file);
+
+ RETURN(rc);
+}
+
struct file_operations smfs_file_fops = {
- read: smfs_read,
- write: smfs_write,
+ llseek: smfs_llseek,
+ read: smfs_read,
+ write: smfs_write,
+ ioctl: smfs_ioctl,
+ mmap: smfs_mmap,
+ open: smfs_open,
+ release: smfs_release,
+ fsync: smfs_fsync,
};
+static void smfs_prepare_cache_dentry(struct dentry *dentry, struct inode *inode)
+{
+ atomic_set(&dentry->d_count, 1);
+ dentry->d_vfs_flags = 0;
+ dentry->d_flags = 0;
+ dentry->d_inode = inode;
+ dentry->d_op = NULL;
+ dentry->d_fsdata = NULL;
+ dentry->d_mounted = 0;
+ INIT_LIST_HEAD(&dentry->d_hash);
+ INIT_LIST_HEAD(&dentry->d_lru);
+ INIT_LIST_HEAD(&dentry->d_subdirs);
+ INIT_LIST_HEAD(&dentry->d_alias);
+}
+
static void smfs_truncate(struct inode * inode)
{
struct inode *cache_inode;
if (cache_inode->i_op->truncate)
cache_inode->i_op->truncate(cache_inode);
- duplicate(inode, cache_inode);
+ duplicate_inode(inode, cache_inode);
return;
}
-static int smfs_setattr(struct dentry *dentry, struct iattr *attr)
+int smfs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ struct inode *cache_inode;
+ struct dentry open_dentry;
+
+ int rc = 0;
+
+ cache_inode = I2CI(dentry->d_inode);
+
+ if (!cache_inode)
+ RETURN(-ENOENT);
+ smfs_prepare_cache_dentry(&open_dentry, cache_inode);
+
+ if (cache_inode->i_op->setattr)
+ rc = cache_inode->i_op->setattr(&open_dentry, attr);
+
+ RETURN(rc);
+}
+
+int smfs_setxattr(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags)
{
struct inode *cache_inode;
+ struct dentry open_dentry;
int rc = 0;
cache_inode = I2CI(dentry->d_inode);
if (!cache_inode)
RETURN(-ENOENT);
+
+ smfs_prepare_cache_dentry(&open_dentry, cache_inode);
if (cache_inode->i_op->setattr)
- rc = cache_inode->i_op->setattr(dentry, attr);
+ rc = cache_inode->i_op->setxattr(&open_dentry, name, value, size, flags);
RETURN(rc);
}
-
+
+int smfs_getxattr(struct dentry *dentry, const char *name,
+ void *buffer, size_t size)
+{
+ struct inode *cache_inode;
+ struct dentry open_dentry;
+ int rc = 0;
+
+ cache_inode = I2CI(dentry->d_inode);
+
+ if (!cache_inode)
+ RETURN(-ENOENT);
+
+ smfs_prepare_cache_dentry(&open_dentry, cache_inode);
+
+ if (cache_inode->i_op->setattr)
+ rc = cache_inode->i_op->getxattr(&open_dentry, name, buffer, size);
+
+ RETURN(rc);
+}
+
+ssize_t smfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
+{
+ struct inode *cache_inode;
+ struct dentry open_dentry;
+ int rc = 0;
+
+ cache_inode = I2CI(dentry->d_inode);
+
+ if (!cache_inode)
+ RETURN(-ENOENT);
+
+ smfs_prepare_cache_dentry(&open_dentry, cache_inode);
+
+ if (cache_inode->i_op->listxattr)
+ rc = cache_inode->i_op->listxattr(&open_dentry, buffer, size);
+
+ RETURN(rc);
+}
+
+int smfs_removexattr(struct dentry *dentry, const char *name)
+{
+ struct inode *cache_inode;
+ struct dentry open_dentry;
+ int rc = 0;
+
+ cache_inode = I2CI(dentry->d_inode);
+
+ if (!cache_inode)
+ RETURN(-ENOENT);
+
+ smfs_prepare_cache_dentry(&open_dentry, cache_inode);
+
+ if (cache_inode->i_op->removexattr)
+ rc = cache_inode->i_op->removexattr(&open_dentry, name);
+
+ RETURN(rc);
+}
+
struct inode_operations smfs_file_iops = {
truncate: smfs_truncate, /* BKL held */
setattr: smfs_setattr, /* BKL held */
+ setxattr: smfs_setxattr, /* BKL held */
+ getxattr: smfs_getxattr, /* BKL held */
+ listxattr: smfs_listxattr, /* BKL held */
+ removexattr: smfs_removexattr, /* BKL held */
};
git://git.whamcloud.com / fs / lustre-release.git / commitdiff