/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * Copyright (C) 2001 Cluster File Systems, Inc. * * This file is part of Lustre, http://www.lustre.org. * * Lustre is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * Lustre is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Lustre; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * Filesystem interface helper. * */ #ifndef _LUSTRE_FSFILT_H #define _LUSTRE_FSFILT_H #ifdef __KERNEL__ #include #include typedef void (*fsfilt_cb_t)(struct obd_device *obd, __u64 last_rcvd, void *data, int error); struct fsfilt_objinfo { struct dentry *fso_dentry; int fso_bufcnt; }; struct fsfilt_operations { struct list_head fs_list; struct module *fs_owner; char *fs_type; void *(* fs_start)(struct inode *inode, int op, void *desc_private, int logs); void *(* fs_brw_start)(int objcount, struct fsfilt_objinfo *fso, int niocount, struct niobuf_local *nb, void *desc_private, int logs); int (* fs_commit)(struct inode *inode, void *handle,int force_sync); int (* fs_commit_async)(struct inode *inode, void *handle, void **wait_handle); int (* fs_commit_wait)(struct inode *inode, void *handle); int (* fs_setattr)(struct dentry *dentry, void *handle, struct iattr *iattr, int do_trunc); int (* fs_iocontrol)(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg); int (* fs_set_md)(struct inode *inode, void *handle, void *md, int size); int (* fs_get_md)(struct inode *inode, void *md, int size); ssize_t (* fs_readpage)(struct file *file, char *buf, size_t count, loff_t *offset); int (* fs_add_journal_cb)(struct obd_device *obd, __u64 last_rcvd, void *handle, fsfilt_cb_t cb_func, void *cb_data); int (* fs_statfs)(struct super_block *sb, struct obd_statfs *osfs); int (* fs_sync)(struct super_block *sb); int (* fs_map_inode_page)(struct inode *inode, struct page *page, unsigned long *blocks, int *created, int create); int (* fs_prep_san_write)(struct inode *inode, long *blocks, int nblocks, loff_t newsize); int (* fs_write_record)(struct file *, void *, int size, loff_t *, int force_sync); int (* fs_read_record)(struct file *, void *, int size, loff_t *); int (* fs_setup)(struct super_block *sb); int (* fs_get_op_len)(int, struct fsfilt_objinfo *, int); }; extern int fsfilt_register_ops(struct fsfilt_operations *fs_ops); extern void fsfilt_unregister_ops(struct fsfilt_operations *fs_ops); extern struct fsfilt_operations *fsfilt_get_ops(const char *type); extern void fsfilt_put_ops(struct fsfilt_operations *fs_ops); #define FSFILT_OP_UNLINK 1 #define FSFILT_OP_RMDIR 2 #define FSFILT_OP_RENAME 3 #define FSFILT_OP_CREATE 4 #define FSFILT_OP_MKDIR 5 #define FSFILT_OP_SYMLINK 6 #define FSFILT_OP_MKNOD 7 #define FSFILT_OP_SETATTR 8 #define FSFILT_OP_LINK 9 #define FSFILT_OP_CANCEL_UNLINK 10 static inline void *fsfilt_start_log(struct obd_device *obd, struct inode *inode, int op, struct obd_trans_info *oti, int logs) { unsigned long now = jiffies; void *parent_handle = oti ? oti->oti_handle : NULL; void *handle = obd->obd_fsops->fs_start(inode, op, parent_handle, logs); CDEBUG(D_INFO, "started handle %p (%p)\n", handle, parent_handle); if (oti != NULL) { if (parent_handle == NULL) { oti->oti_handle = handle; } else if (handle != parent_handle) { CERROR("mismatch: parent %p, handle %p, oti %p\n", parent_handle, handle, oti); LBUG(); } } if (time_after(jiffies, now + 15 * HZ)) CERROR("long journal start time %lus\n", (jiffies - now) / HZ); return handle; } static inline void *fsfilt_start(struct obd_device *obd, struct inode *inode, int op, struct obd_trans_info *oti) { return fsfilt_start_log(obd, inode, op, oti, 0); } static inline void *fsfilt_brw_start_log(struct obd_device *obd, int objcount, struct fsfilt_objinfo *fso, int niocount, struct niobuf_local *nb, struct obd_trans_info *oti, int logs) { unsigned long now = jiffies; void *parent_handle = oti ? oti->oti_handle : NULL; void *handle = obd->obd_fsops->fs_brw_start(objcount, fso, niocount, nb, parent_handle, logs); CDEBUG(D_HA, "started handle %p (%p)\n", handle, parent_handle); if (oti != NULL) { if (parent_handle == NULL) { oti->oti_handle = handle; } else if (handle != parent_handle) { CERROR("mismatch: parent %p, handle %p, oti %p\n", parent_handle, handle, oti); LBUG(); } } if (time_after(jiffies, now + 15 * HZ)) CERROR("long journal start time %lus\n", (jiffies - now) / HZ); return handle; } static inline void *fsfilt_brw_start(struct obd_device *obd, int objcount, struct fsfilt_objinfo *fso, int niocount, struct niobuf_local *nb, struct obd_trans_info *oti) { return fsfilt_brw_start_log(obd, objcount, fso, niocount, nb, oti, 0); } static inline int fsfilt_commit(struct obd_device *obd, struct inode *inode, void *handle, int force_sync) { unsigned long now = jiffies; int rc = obd->obd_fsops->fs_commit(inode, handle, force_sync); CDEBUG(D_INFO, "committing handle %p\n", handle); if (time_after(jiffies, now + 15 * HZ)) CERROR("long journal start time %lus\n", (jiffies - now) / HZ); return rc; } static inline int fsfilt_commit_async(struct obd_device *obd, struct inode *inode, void *handle, void **wait_handle) { unsigned long now = jiffies; int rc = obd->obd_fsops->fs_commit_async(inode, handle, wait_handle); CDEBUG(D_HA, "committing handle %p (async)\n", *wait_handle); if (time_after(jiffies, now + 15 * HZ)) CERROR("long journal start time %lus\n", (jiffies - now) / HZ); return rc; } static inline int fsfilt_commit_wait(struct obd_device *obd, struct inode *inode, void *handle) { unsigned long now = jiffies; int rc = obd->obd_fsops->fs_commit_wait(inode, handle); CDEBUG(D_HA, "waiting for completion %p\n", handle); if (time_after(jiffies, now + 15 * HZ)) CERROR("long journal start time %lus\n", (jiffies - now) / HZ); return rc; } static inline int fsfilt_setattr(struct obd_device *obd, struct dentry *dentry, void *handle, struct iattr *iattr,int do_trunc) { unsigned long now = jiffies; int rc; rc = obd->obd_fsops->fs_setattr(dentry, handle, iattr, do_trunc); if (time_after(jiffies, now + 15 * HZ)) CERROR("long setattr time %lus\n", (jiffies - now) / HZ); return rc; } static inline int fsfilt_iocontrol(struct obd_device *obd, struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { return obd->obd_fsops->fs_iocontrol(inode, file, cmd, arg); } static inline int fsfilt_set_md(struct obd_device *obd, struct inode *inode, void *handle, void *md, int size) { return obd->obd_fsops->fs_set_md(inode, handle, md, size); } static inline int fsfilt_get_md(struct obd_device *obd, struct inode *inode, void *md, int size) { return obd->obd_fsops->fs_get_md(inode, md, size); } static inline ssize_t fsfilt_readpage(struct obd_device *obd, struct file *file, char *buf, size_t count, loff_t *offset) { return obd->obd_fsops->fs_readpage(file, buf, count, offset); } static inline int fsfilt_add_journal_cb(struct obd_device *obd, __u64 last_rcvd, void *handle, fsfilt_cb_t cb_func, void *cb_data) { return obd->obd_fsops->fs_add_journal_cb(obd, last_rcvd, handle, cb_func, cb_data); } /* very similar to obd_statfs(), but caller already holds obd_osfs_lock */ static inline int fsfilt_statfs(struct obd_device *obd, struct super_block *sb, unsigned long max_age) { int rc = 0; CDEBUG(D_SUPER, "osfs %lu, max_age %lu\n", obd->obd_osfs_age, max_age); if (time_before(obd->obd_osfs_age, max_age)) { rc = obd->obd_fsops->fs_statfs(sb, &obd->obd_osfs); if (rc == 0) /* N.B. statfs can't really fail */ obd->obd_osfs_age = jiffies; } else { CDEBUG(D_SUPER, "using cached obd_statfs data\n"); } return rc; } static inline int fsfilt_sync(struct obd_device *obd, struct super_block *sb) { return obd->obd_fsops->fs_sync(sb); } static inline int fsfilt_map_inode_page(struct obd_device *obd, struct inode *inode, struct page *page, unsigned long *blocks, int *created, int create) { return obd->obd_fsops->fs_map_inode_page(inode, page, blocks, created, create); } static inline int fs_prep_san_write(struct obd_device *obd, struct inode *inode, long *blocks, int nblocks, loff_t newsize) { return obd->obd_fsops->fs_prep_san_write(inode, blocks, nblocks, newsize); } static inline int fsfilt_read_record(struct obd_device *obd, struct file *file, void *buf, loff_t size, loff_t *offs) { return obd->obd_fsops->fs_read_record(file, buf, size, offs); } static inline int fsfilt_write_record(struct obd_device *obd, struct file *file, void *buf, loff_t size, loff_t *offs, int force_sync) { return obd->obd_fsops->fs_write_record(file, buf, size,offs,force_sync); } static inline int fsfilt_setup(struct obd_device *obd, struct super_block *fs) { if (obd->obd_fsops->fs_setup) return obd->obd_fsops->fs_setup(fs); return 0; } #endif /* __KERNEL__ */ #endif