* lustre/lib/fsfilt_smfs.c
* Lustre filesystem abstraction routines
*
- * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
+ * Copyright (C) 2004 Cluster File Systems, Inc.
* Author: Wang Di <wangdi@clusterfs.com>
*
* This file is part of Lustre, http://www.lustre.org.
#include <linux/pagemap.h>
#include <linux/quotaops.h>
#include <linux/version.h>
-#include <linux/kp30.h>
+#include <libcfs/kp30.h>
#include <linux/lustre_fsfilt.h>
-#include <linux/lustre_smfs.h>
+//#include <linux/lustre_smfs.h>
#include <linux/obd.h>
#include <linux/obd_class.h>
#include <linux/module.h>
#include <linux/init.h>
-static void *fsfilt_smfs_start(struct inode *inode, int op,
- void *desc_private, int logs)
-{
- void *handle;
- struct inode *cache_inode = I2CI(inode);
- struct fsfilt_operations *cache_fsfilt = I2FOPS(inode);
-
- if (cache_fsfilt == NULL)
- return NULL;
-
- if (!cache_fsfilt->fs_start)
- return ERR_PTR(-ENOSYS);
-
- handle = cache_fsfilt->fs_start(cache_inode, op,
- desc_private, logs);
- return handle;
-}
-
-static void *fsfilt_smfs_brw_start(int objcount, struct fsfilt_objinfo *fso,
- int niocount, struct niobuf_local *nb,
- void *desc_private, int logs)
-{
- struct fsfilt_operations *cache_fsfilt;
- struct dentry *cache_dentry = NULL;
- struct inode *cache_inode = NULL;
- struct fsfilt_objinfo cache_fso;
- void *rc = NULL;
-
- ENTRY;
- cache_fsfilt = I2FOPS(fso->fso_dentry->d_inode);
- if (cache_fsfilt == NULL)
- return NULL;
-
- cache_inode = I2CI(fso->fso_dentry->d_inode);
- cache_dentry = pre_smfs_dentry(NULL, cache_inode, fso->fso_dentry);
-
- if (!cache_dentry)
- GOTO(exit, rc = ERR_PTR(-ENOMEM));
-
- cache_fso.fso_dentry = cache_dentry;
- cache_fso.fso_bufcnt = fso->fso_bufcnt;
-
- if (!cache_fsfilt->fs_brw_start)
- return ERR_PTR(-ENOSYS);
-
- rc = (cache_fsfilt->fs_brw_start(objcount, &cache_fso,
- niocount, nb, desc_private,
- logs));
-exit:
- post_smfs_dentry(cache_dentry);
- return rc;
-}
-
-static int fsfilt_smfs_commit(struct inode *inode, void *h,
- int force_sync)
-{
- struct fsfilt_operations *cache_fsfilt = I2FOPS(inode);
- struct inode *cache_inode = NULL;
- int rc = -EIO;
-
- cache_inode = I2CI(inode);
-
- if (cache_fsfilt == NULL)
- RETURN(rc);
-
- if (!cache_fsfilt->fs_commit)
- RETURN(-ENOSYS);
-
- rc = cache_fsfilt->fs_commit(cache_inode, h, force_sync);
-
- RETURN(rc);
-}
-
-static int fsfilt_smfs_commit_async(struct inode *inode, void *h,
- void **wait_handle)
-{
- struct fsfilt_operations *cache_fsfilt = I2FOPS(inode);
- struct inode *cache_inode = NULL;
- int rc = -EIO;
-
- cache_inode = I2CI(inode);
- if (cache_fsfilt == NULL)
- RETURN(-EINVAL);
-
- if (!cache_fsfilt->fs_commit_async)
- RETURN(-ENOSYS);
-
- rc = cache_fsfilt->fs_commit_async(cache_inode, h, wait_handle);
-
- RETURN(rc);
-}
-
-static int fsfilt_smfs_commit_wait(struct inode *inode, void *h)
-{
- struct fsfilt_operations *cache_fsfilt = I2FOPS(inode);
- struct inode *cache_inode = NULL;
- int rc = -EIO;
-
- cache_inode = I2CI(inode);
- if (cache_fsfilt == NULL)
- RETURN(-EINVAL);
-
- if (!cache_fsfilt->fs_commit_wait)
- RETURN(-ENOSYS);
-
- rc = cache_fsfilt->fs_commit_wait(cache_inode, h);
-
- RETURN(rc);
-}
-
-static int fsfilt_smfs_setattr(struct dentry *dentry, void *handle,
- struct iattr *iattr, int do_trunc)
-{
- struct fsfilt_operations *cache_fsfilt = I2FOPS(dentry->d_inode);
- struct dentry *cache_dentry = NULL;
- struct inode *cache_inode = NULL;
- int rc = -EIO;
-
- if (!cache_fsfilt)
- RETURN(rc);
-
- cache_inode = I2CI(dentry->d_inode);
-
- cache_dentry = pre_smfs_dentry(NULL, cache_inode, dentry);
- if (!cache_dentry)
- GOTO(exit, rc = -ENOMEM);
-
- pre_smfs_inode(dentry->d_inode, cache_inode);
-
- if (!cache_fsfilt->fs_setattr)
- RETURN(-ENOSYS);
-
- rc = cache_fsfilt->fs_setattr(cache_dentry, handle,
- iattr, do_trunc);
-
- post_smfs_inode(dentry->d_inode, cache_inode);
-
-exit:
- post_smfs_dentry(cache_dentry);
- RETURN(rc);
-}
-
-static int fsfilt_smfs_iocontrol(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- struct fsfilt_operations *cache_fsfilt = I2FOPS(inode);
- struct inode *cache_inode = NULL;
- struct smfs_file_info *sfi = NULL;
- int rc = -EIO;
- ENTRY;
-
- if (!cache_fsfilt)
- RETURN(rc);
-
- cache_inode = I2CI(inode);
-
- if (!cache_inode)
- RETURN(rc);
-
- if (file != NULL) {
- sfi = F2SMFI(file);
-
- if (sfi->magic != SMFS_FILE_MAGIC)
- BUG();
- } else {
- sfi = NULL;
- }
-
- if (!cache_fsfilt->fs_iocontrol)
- RETURN(-ENOSYS);
-
- if (sfi) {
- rc = cache_fsfilt->fs_iocontrol(cache_inode,
- sfi->c_file,
- cmd, arg);
- } else {
- rc = cache_fsfilt->fs_iocontrol(cache_inode,
- NULL, cmd, arg);
- }
-
- /* FIXME-UMKA: Should this be in duplicate_inode()? */
- if (rc == 0 && cmd == EXT3_IOC_SETFLAGS)
- inode->i_flags = cache_inode->i_flags;
-
- post_smfs_inode(inode, cache_inode);
-
- RETURN(rc);
-}
-
-static int fsfilt_smfs_set_md(struct inode *inode, void *handle,
- void *lmm, int lmm_size)
-{
- struct fsfilt_operations *cache_fsfilt = I2FOPS(inode);
- struct inode *cache_inode = NULL;
- int rc = -EIO;
-
- if (!cache_fsfilt)
- RETURN(-EINVAL);
-
- cache_inode = I2CI(inode);
-
- if (!cache_inode)
- RETURN(-ENOENT);
-
- pre_smfs_inode(inode, cache_inode);
-
- if (!cache_fsfilt->fs_set_md)
- RETURN(-ENOSYS);
-
- down(&cache_inode->i_sem);
-
- rc = cache_fsfilt->fs_set_md(cache_inode, handle,
- lmm, lmm_size);
-
- up(&cache_inode->i_sem);
-
- post_smfs_inode(inode, cache_inode);
-
- RETURN(rc);
-}
-
-/* Must be called with i_sem held */
-static int fsfilt_smfs_get_md(struct inode *inode, void *lmm, int lmm_size)
-{
- struct fsfilt_operations *cache_fsfilt = I2FOPS(inode);
- struct inode *cache_inode = NULL;
- int rc = -EIO;
-
- if (!cache_fsfilt)
- RETURN(-EINVAL);
-
- cache_inode = I2CI(inode);
-
- if (!cache_inode)
- RETURN(-ENOENT);
-
- pre_smfs_inode(inode, cache_inode);
-
- if (!cache_fsfilt->fs_get_md)
- RETURN(-ENOSYS);
-
- down(&cache_inode->i_sem);
-
- rc = cache_fsfilt->fs_get_md(cache_inode, lmm,
- lmm_size);
-
- up(&cache_inode->i_sem);
-
- post_smfs_inode(inode, cache_inode);
-
- RETURN(rc);
-}
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
-static int fsfilt_smfs_send_bio(struct inode *inode,
- struct bio *bio)
-#else
-static int fsfilt_smfs_send_bio(struct inode *inode,
- struct kiobuf *bio)
-#endif
-{
- struct inode *cache_inode;
- struct fsfilt_operations *cache_fsfilt;
-
- cache_fsfilt = I2FOPS(inode);
- if (!cache_fsfilt)
- RETURN(-EINVAL);
-
- cache_inode = I2CI(inode);
- if (!cache_inode)
- RETURN(-EINVAL);
-
- if (!cache_fsfilt->fs_send_bio)
- RETURN(-ENOSYS);
-
- return cache_fsfilt->fs_send_bio(cache_inode, bio);
-}
-
-static struct page *
-fsfilt_smfs_getpage(struct inode *inode, long int index)
-{
- struct fsfilt_operations *cache_fsfilt;
- struct inode *cache_inode;
-
- cache_fsfilt = I2FOPS(inode);
- if (!cache_fsfilt)
- RETURN(ERR_PTR(-EINVAL));
-
- cache_inode = I2CI(inode);
- if (!cache_inode)
- RETURN(ERR_PTR(-EINVAL));
-
- if (!cache_fsfilt->fs_getpage)
- RETURN(ERR_PTR(-ENOSYS));
-
- return cache_fsfilt->fs_getpage(cache_inode, index);
-}
-
-static ssize_t fsfilt_smfs_readpage(struct file *file, char *buf,
- size_t count, loff_t *off)
-{
- struct fsfilt_operations *cache_fsfilt;
- struct smfs_file_info *sfi;
- struct inode *cache_inode;
- loff_t tmp_ppos;
- loff_t *cache_ppos;
- ssize_t rc = -EIO;
-
- ENTRY;
-
- cache_fsfilt = I2FOPS(file->f_dentry->d_inode);
- if (!cache_fsfilt)
- RETURN(rc);
-
- cache_inode = I2CI(file->f_dentry->d_inode);
- if (!cache_inode)
- RETURN(rc);
-
- sfi = F2SMFI(file);
- if (sfi->magic != SMFS_FILE_MAGIC)
- BUG();
-
- if (off != &(file->f_pos)) {
- cache_ppos = &tmp_ppos;
- } else {
- cache_ppos = &sfi->c_file->f_pos;
- }
- *cache_ppos = *off;
-
- pre_smfs_inode(file->f_dentry->d_inode, cache_inode);
-
- if (cache_fsfilt->fs_readpage)
- rc = cache_fsfilt->fs_readpage(sfi->c_file, buf,
- count, cache_ppos);
-
- *off = *cache_ppos;
- post_smfs_inode(file->f_dentry->d_inode, cache_inode);
- duplicate_file(file, sfi->c_file);
-
- RETURN(rc);
-}
-
-static int fsfilt_smfs_add_journal_cb(struct obd_device *obd,
- struct super_block *sb,
- __u64 last_rcvd, void *handle,
- fsfilt_cb_t cb_func,
- void *cb_data)
-{
- struct fsfilt_operations *cache_fsfilt = S2SMI(sb)->sm_cache_fsfilt;
- struct super_block *csb = S2CSB(sb);
- int rc = -EIO;
-
- if (!cache_fsfilt)
- RETURN(rc);
- if (cache_fsfilt->fs_add_journal_cb)
- rc = cache_fsfilt->fs_add_journal_cb(obd, csb, last_rcvd,
- handle, cb_func, cb_data);
- RETURN(rc);
-}
-
-static int fsfilt_smfs_statfs(struct super_block *sb, struct obd_statfs *osfs)
-{
- struct fsfilt_operations *cache_fsfilt = S2SMI(sb)->sm_cache_fsfilt;
- struct super_block *csb = S2CSB(sb);
- int rc = -EIO;
-
- if (!cache_fsfilt)
- RETURN(rc);
-
- if (!cache_fsfilt->fs_statfs)
- RETURN(-ENOSYS);
-
- rc = cache_fsfilt->fs_statfs(csb, osfs);
- duplicate_sb(csb, sb);
-
- RETURN(rc);
-}
-
-static int fsfilt_smfs_sync(struct super_block *sb)
-{
- struct fsfilt_operations *cache_fsfilt = S2SMI(sb)->sm_cache_fsfilt;
- struct super_block *csb = S2CSB(sb);
- int rc = -EIO;
-
- if(!cache_fsfilt)
- RETURN(-EINVAL);
-
- if (!cache_fsfilt->fs_sync)
- RETURN(-ENOSYS);
-
- rc = cache_fsfilt->fs_sync(csb);
-
- RETURN(rc);
-}
-
-int fsfilt_smfs_map_inode_pages(struct inode *inode, struct page **page,
- int pages, unsigned long *blocks,
- int *created, int create,
- struct semaphore *sem)
-{
- struct fsfilt_operations *cache_fsfilt = I2FOPS(inode);
- struct inode *cache_inode = NULL;
- int rc = -EIO;
-
- if (!cache_fsfilt)
- RETURN(-EINVAL);
-
- cache_inode = I2CI(inode);
-
- if (!cache_inode)
- RETURN(rc);
-
- if (!cache_fsfilt->fs_map_inode_pages)
- RETURN(-ENOSYS);
-
- down(&cache_inode->i_sem);
- rc = cache_fsfilt->fs_map_inode_pages(cache_inode, page, pages, blocks,
- created, create, NULL);
- up(&cache_inode->i_sem);
-
- RETURN(rc);
-}
-
-static int fsfilt_smfs_prep_san_write(struct inode *inode, long *blocks,
- int nblocks, loff_t newsize)
-{
- struct fsfilt_operations *cache_fsfilt = I2FOPS(inode);
- struct inode *cache_inode = NULL;
- int rc = -EIO;
-
- if (!cache_fsfilt)
- RETURN(-EINVAL);
-
- cache_inode = I2CI(inode);
-
- if (!cache_inode)
- RETURN(-EINVAL);
-
- if (!cache_fsfilt->fs_prep_san_write)
- RETURN(-ENOSYS);
-
- down(&cache_inode->i_sem);
- rc = cache_fsfilt->fs_prep_san_write(cache_inode, blocks,
- nblocks, newsize);
- up(&cache_inode->i_sem);
-
- RETURN(rc);
-}
-
-static int fsfilt_smfs_read_record(struct file * file, void *buf,
- int size, loff_t *offs)
-{
- struct fsfilt_operations *cache_fsfilt;
- struct inode *cache_inode;
- struct smfs_file_info *sfi;
- loff_t tmp_ppos;
- loff_t *cache_ppos;
- ssize_t rc;
-
- ENTRY;
- cache_fsfilt = I2FOPS(file->f_dentry->d_inode);
- if (!cache_fsfilt)
- RETURN(-EINVAL);
-
- cache_inode = I2CI(file->f_dentry->d_inode);
-
- if (!cache_inode)
- RETURN(-EINVAL);
-
- sfi = F2SMFI(file);
- if (sfi->magic != SMFS_FILE_MAGIC) BUG();
-
- if (offs != &(file->f_pos)) {
- cache_ppos = &tmp_ppos;
- } else {
- cache_ppos = &sfi->c_file->f_pos;
- }
- *cache_ppos = *offs;
-
- pre_smfs_inode(file->f_dentry->d_inode, cache_inode);
-
- if (!cache_fsfilt->fs_read_record)
- RETURN(-ENOSYS);
-
- rc = cache_fsfilt->fs_read_record(sfi->c_file, buf,
- size, cache_ppos);
-
- *offs = *cache_ppos;
- post_smfs_inode(file->f_dentry->d_inode, cache_inode);
- duplicate_file(file, sfi->c_file);
-
- RETURN(rc);
-}
-
-static int fsfilt_smfs_write_record(struct file *file, void *buf, int bufsize,
- loff_t *offs, int force_sync)
-{
- struct fsfilt_operations *cache_fsfilt;
- struct inode *cache_inode;
- struct smfs_file_info *sfi;
- loff_t tmp_ppos;
- loff_t *cache_ppos;
- ssize_t rc = -EIO;
-
- ENTRY;
-
- cache_fsfilt = I2FOPS(file->f_dentry->d_inode);
- if (!cache_fsfilt)
- RETURN(-EINVAL);
-
- cache_inode = I2CI(file->f_dentry->d_inode);
-
- if (!cache_inode)
- RETURN(-EINVAL);
-
- sfi = F2SMFI(file);
- if (sfi->magic != SMFS_FILE_MAGIC) BUG();
-
- if (offs != &(file->f_pos)) {
- cache_ppos = &tmp_ppos;
- } else {
- cache_ppos = &sfi->c_file->f_pos;
- }
- *cache_ppos = *offs;
-
- pre_smfs_inode(file->f_dentry->d_inode, cache_inode);
-
- if (!cache_fsfilt->fs_write_record)
- RETURN(-ENOSYS);
-
- rc = cache_fsfilt->fs_write_record(sfi->c_file, buf,
- bufsize, cache_ppos, force_sync);
- *offs = *cache_ppos;
- post_smfs_inode(file->f_dentry->d_inode, cache_inode);
- duplicate_file(file, sfi->c_file);
-
- RETURN(rc);
-}
-
-static int fsfilt_smfs_setup(struct super_block *sb)
-{
- struct smfs_super_info *smfs_info = S2SMI(sb);
- struct fsfilt_operations *cache_fsfilt;
- struct super_block *csb;
- int rc = 0;
-
- /* It should be initialized olready by smfs_read_super(). */
- if (!(cache_fsfilt = smfs_info->sm_cache_fsfilt))
- cache_fsfilt = fsfilt_get_ops(smfs_info->cache_fs_type);
-
- if (!cache_fsfilt)
- RETURN(-ENOENT);
-
- csb = S2CSB(sb);
-
- if (cache_fsfilt->fs_setup)
- rc = cache_fsfilt->fs_setup(csb);
-
- RETURN(rc);
-}
-
-static int fsfilt_smfs_set_xattr(struct inode *inode, void *handle,
- char *name, void *buffer,
- int buffer_size)
-{
- struct fsfilt_operations *cache_fsfilt = I2FOPS(inode);
- struct inode *cache_inode = NULL;
- int rc = -EIO;
-
- if (!cache_fsfilt)
- RETURN(rc);
-
- cache_inode = I2CI(inode);
- if (!cache_inode)
- RETURN(rc);
-
- pre_smfs_inode(inode, cache_inode);
-
- if (cache_fsfilt->fs_set_xattr)
- rc = cache_fsfilt->fs_set_xattr(cache_inode, handle, name,
- buffer, buffer_size);
- post_smfs_inode(inode, cache_inode);
-
- RETURN(rc);
-}
-
-static int fsfilt_smfs_get_xattr(struct inode *inode, char *name,
- void *buffer, int buffer_size)
-{
- struct fsfilt_operations *cache_fsfilt = I2FOPS(inode);
- struct inode *cache_inode = NULL;
- int rc = -EIO;
-
- if (!cache_fsfilt)
- RETURN(rc);
-
- cache_inode = I2CI(inode);
- if (!cache_inode)
- RETURN(rc);
-
- pre_smfs_inode(inode, cache_inode);
-
- if (cache_fsfilt->fs_get_xattr)
- rc = cache_fsfilt->fs_get_xattr(cache_inode, name,
- buffer, buffer_size);
- post_smfs_inode(inode, cache_inode);
-
- RETURN(rc);
-}
-
-static struct fsfilt_operations fsfilt_smfs_ops = {
- .fs_type = "smfs",
- .fs_owner = THIS_MODULE,
- .fs_start = fsfilt_smfs_start,
- .fs_brw_start = fsfilt_smfs_brw_start,
- .fs_commit = fsfilt_smfs_commit,
- .fs_commit_async = fsfilt_smfs_commit_async,
- .fs_commit_wait = fsfilt_smfs_commit_wait,
- .fs_setattr = fsfilt_smfs_setattr,
- .fs_iocontrol = fsfilt_smfs_iocontrol,
- .fs_set_md = fsfilt_smfs_set_md,
- .fs_get_md = fsfilt_smfs_get_md,
- .fs_readpage = fsfilt_smfs_readpage,
- .fs_getpage = fsfilt_smfs_getpage,
- .fs_add_journal_cb = fsfilt_smfs_add_journal_cb,
- .fs_statfs = fsfilt_smfs_statfs,
- .fs_sync = fsfilt_smfs_sync,
- .fs_map_inode_pages = fsfilt_smfs_map_inode_pages,
- .fs_prep_san_write = fsfilt_smfs_prep_san_write,
- .fs_write_record = fsfilt_smfs_write_record,
- .fs_read_record = fsfilt_smfs_read_record,
- .fs_setup = fsfilt_smfs_setup,
- .fs_send_bio = fsfilt_smfs_send_bio,
- .fs_set_xattr = fsfilt_smfs_set_xattr,
- .fs_get_xattr = fsfilt_smfs_get_xattr,
-
- /* FIXME-UMKA: probably fsfilt_smfs_get_op_len() should be put here
- * too. */
-};
+extern struct fsfilt_operations * get_smfs_fs_ops(void);
static int __init fsfilt_smfs_init(void)
{
- int rc;
+ int rc = -ENOSYS;
+ struct fsfilt_operations * fs_ops = get_smfs_fs_ops();
- rc = fsfilt_register_ops(&fsfilt_smfs_ops);
+ rc = fsfilt_register_ops(fs_ops);
return rc;
}
static void __exit fsfilt_smfs_exit(void)
{
- fsfilt_unregister_ops(&fsfilt_smfs_ops);
+ fsfilt_unregister_ops(get_smfs_fs_ops());
}
module_init(fsfilt_smfs_init);
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