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Diffstat (limited to 'fs/9p/v9fs_vfs.h')
| -rw-r--r-- | fs/9p/v9fs_vfs.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h new file mode 100644 index 000000000..5a0db6dec --- /dev/null +++ b/fs/9p/v9fs_vfs.h @@ -0,0 +1,86 @@ +/* + * V9FS VFS extensions. + * + * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> + * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program 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 this program; if not, write to: + * Free Software Foundation + * 51 Franklin Street, Fifth Floor + * Boston, MA 02111-1301 USA + * + */ +#ifndef FS_9P_V9FS_VFS_H +#define FS_9P_V9FS_VFS_H + +/* plan9 semantics are that created files are implicitly opened. + * But linux semantics are that you call create, then open. + * the plan9 approach is superior as it provides an atomic + * open. + * we track the create fid here. When the file is opened, if fidopen is + * non-zero, we use the fid and can skip some steps. + * there may be a better way to do this, but I don't know it. + * one BAD way is to clunk the fid on create, then open it again: + * you lose the atomicity of file open + */ + +/* special case: + * unlink calls remove, which is an implicit clunk. So we have to track + * that kind of thing so that we don't try to clunk a dead fid. + */ +#define P9_LOCK_TIMEOUT (30*HZ) + +extern struct file_system_type v9fs_fs_type; +extern const struct address_space_operations v9fs_addr_operations; +extern const struct file_operations v9fs_file_operations; +extern const struct file_operations v9fs_file_operations_dotl; +extern const struct file_operations v9fs_dir_operations; +extern const struct file_operations v9fs_dir_operations_dotl; +extern const struct dentry_operations v9fs_dentry_operations; +extern const struct dentry_operations v9fs_cached_dentry_operations; +extern const struct file_operations v9fs_cached_file_operations; +extern const struct file_operations v9fs_cached_file_operations_dotl; +extern const struct file_operations v9fs_mmap_file_operations; +extern const struct file_operations v9fs_mmap_file_operations_dotl; +extern struct kmem_cache *v9fs_inode_cache; + +struct inode *v9fs_alloc_inode(struct super_block *sb); +void v9fs_destroy_inode(struct inode *inode); +struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t); +int v9fs_init_inode(struct v9fs_session_info *v9ses, + struct inode *inode, umode_t mode, dev_t); +void v9fs_evict_inode(struct inode *inode); +ino_t v9fs_qid2ino(struct p9_qid *qid); +void v9fs_stat2inode(struct p9_wstat *, struct inode *, struct super_block *); +void v9fs_stat2inode_dotl(struct p9_stat_dotl *, struct inode *); +int v9fs_dir_release(struct inode *inode, struct file *filp); +int v9fs_file_open(struct inode *inode, struct file *file); +void v9fs_inode2stat(struct inode *inode, struct p9_wstat *stat); +int v9fs_uflags2omode(int uflags, int extended); + +void v9fs_blank_wstat(struct p9_wstat *wstat); +int v9fs_vfs_setattr_dotl(struct dentry *, struct iattr *); +int v9fs_file_fsync_dotl(struct file *filp, loff_t start, loff_t end, + int datasync); +int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode); +int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode); +static inline void v9fs_invalidate_inode_attr(struct inode *inode) +{ + struct v9fs_inode *v9inode; + v9inode = V9FS_I(inode); + v9inode->cache_validity |= V9FS_INO_INVALID_ATTR; + return; +} + +int v9fs_open_to_dotl_flags(int flags); +#endif |