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-rw-r--r--fs/9p/v9fs.h147
1 files changed, 126 insertions, 21 deletions
diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index a7d56719299..099c7712631 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -20,23 +20,37 @@
* Boston, MA 02111-1301 USA
*
*/
+#ifndef FS_9P_V9FS_H
+#define FS_9P_V9FS_H
+
+#include <linux/backing-dev.h>
/**
* enum p9_session_flags - option flags for each 9P session
- * @V9FS_EXTENDED: whether or not to use 9P2000.u extensions
+ * @V9FS_PROTO_2000U: whether or not to use 9P2000.u extensions
+ * @V9FS_PROTO_2000L: whether or not to use 9P2000.l extensions
* @V9FS_ACCESS_SINGLE: only the mounting user can access the hierarchy
* @V9FS_ACCESS_USER: a new attach will be issued for every user (default)
+ * @V9FS_ACCESS_CLIENT: Just like user, but access check is performed on client.
* @V9FS_ACCESS_ANY: use a single attach for all users
* @V9FS_ACCESS_MASK: bit mask of different ACCESS options
+ * @V9FS_POSIX_ACL: POSIX ACLs are enforced
*
* Session flags reflect options selected by users at mount time
*/
+#define V9FS_ACCESS_ANY (V9FS_ACCESS_SINGLE | \
+ V9FS_ACCESS_USER | \
+ V9FS_ACCESS_CLIENT)
+#define V9FS_ACCESS_MASK V9FS_ACCESS_ANY
+#define V9FS_ACL_MASK V9FS_POSIX_ACL
+
enum p9_session_flags {
- V9FS_EXTENDED = 0x01,
- V9FS_ACCESS_SINGLE = 0x02,
- V9FS_ACCESS_USER = 0x04,
- V9FS_ACCESS_ANY = 0x06,
- V9FS_ACCESS_MASK = 0x06,
+ V9FS_PROTO_2000U = 0x01,
+ V9FS_PROTO_2000L = 0x02,
+ V9FS_ACCESS_SINGLE = 0x04,
+ V9FS_ACCESS_USER = 0x08,
+ V9FS_ACCESS_CLIENT = 0x10,
+ V9FS_POSIX_ACL = 0x20
};
/* possible values of ->cache */
@@ -50,7 +64,9 @@ enum p9_session_flags {
enum p9_cache_modes {
CACHE_NONE,
+ CACHE_MMAP,
CACHE_LOOSE,
+ CACHE_FSCACHE,
};
/**
@@ -60,6 +76,8 @@ enum p9_cache_modes {
* @debug: debug level
* @afid: authentication handle
* @cache: cache mode of type &p9_cache_modes
+ * @cachetag: the tag of the cache associated with this session
+ * @fscache: session cookie associated with FS-Cache
* @options: copy of options string given by user
* @uname: string user name to mount hierarchy as
* @aname: mount specifier for remote hierarchy
@@ -68,7 +86,7 @@ enum p9_cache_modes {
* @dfltgid: default numeric groupid to mount hierarchy as
* @uid: if %V9FS_ACCESS_SINGLE, the numeric uid which mounted the hierarchy
* @clnt: reference to 9P network client instantiated for this session
- * @debugfs_dir: reference to debugfs_dir which can be used for add'l debug
+ * @slist: reference to list of registered 9p sessions
*
* This structure holds state for each session instance established during
* a sys_mount() .
@@ -84,40 +102,127 @@ struct v9fs_session_info {
unsigned short debug;
unsigned int afid;
unsigned int cache;
+#ifdef CONFIG_9P_FSCACHE
+ char *cachetag;
+ struct fscache_cookie *fscache;
+#endif
- char *options; /* copy of mount options */
char *uname; /* user name to mount as */
char *aname; /* name of remote hierarchy being mounted */
unsigned int maxdata; /* max data for client interface */
- unsigned int dfltuid; /* default uid/muid for legacy support */
- unsigned int dfltgid; /* default gid for legacy support */
- u32 uid; /* if ACCESS_SINGLE, the uid that has access */
+ kuid_t dfltuid; /* default uid/muid for legacy support */
+ kgid_t dfltgid; /* default gid for legacy support */
+ kuid_t uid; /* if ACCESS_SINGLE, the uid that has access */
struct p9_client *clnt; /* 9p client */
- struct dentry *debugfs_dir;
+ struct list_head slist; /* list of sessions registered with v9fs */
+ struct backing_dev_info bdi;
+ struct rw_semaphore rename_sem;
};
-extern struct dentry *v9fs_debugfs_root;
+/* cache_validity flags */
+#define V9FS_INO_INVALID_ATTR 0x01
+
+struct v9fs_inode {
+#ifdef CONFIG_9P_FSCACHE
+ spinlock_t fscache_lock;
+ struct fscache_cookie *fscache;
+#endif
+ struct p9_qid qid;
+ unsigned int cache_validity;
+ struct p9_fid *writeback_fid;
+ struct mutex v_mutex;
+ struct inode vfs_inode;
+};
+
+static inline struct v9fs_inode *V9FS_I(const struct inode *inode)
+{
+ return container_of(inode, struct v9fs_inode, vfs_inode);
+}
struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *,
char *);
-void v9fs_session_close(struct v9fs_session_info *v9ses);
-void v9fs_session_cancel(struct v9fs_session_info *v9ses);
-
-#define V9FS_MAGIC 0x01021997
+extern void v9fs_session_close(struct v9fs_session_info *v9ses);
+extern void v9fs_session_cancel(struct v9fs_session_info *v9ses);
+extern void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses);
+extern struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
+ unsigned int flags);
+extern int v9fs_vfs_unlink(struct inode *i, struct dentry *d);
+extern int v9fs_vfs_rmdir(struct inode *i, struct dentry *d);
+extern int v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry);
+extern void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd,
+ void *p);
+extern struct inode *v9fs_inode_from_fid(struct v9fs_session_info *v9ses,
+ struct p9_fid *fid,
+ struct super_block *sb, int new);
+extern const struct inode_operations v9fs_dir_inode_operations_dotl;
+extern const struct inode_operations v9fs_file_inode_operations_dotl;
+extern const struct inode_operations v9fs_symlink_inode_operations_dotl;
+extern struct inode *v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses,
+ struct p9_fid *fid,
+ struct super_block *sb, int new);
/* other default globals */
#define V9FS_PORT 564
#define V9FS_DEFUSER "nobody"
#define V9FS_DEFANAME ""
-#define V9FS_DEFUID (-2)
-#define V9FS_DEFGID (-2)
+#define V9FS_DEFUID KUIDT_INIT(-2)
+#define V9FS_DEFGID KGIDT_INIT(-2)
static inline struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode)
{
return (inode->i_sb->s_fs_info);
}
-static inline int v9fs_extended(struct v9fs_session_info *v9ses)
+static inline struct v9fs_session_info *v9fs_dentry2v9ses(struct dentry *dentry)
+{
+ return dentry->d_sb->s_fs_info;
+}
+
+static inline int v9fs_proto_dotu(struct v9fs_session_info *v9ses)
+{
+ return v9ses->flags & V9FS_PROTO_2000U;
+}
+
+static inline int v9fs_proto_dotl(struct v9fs_session_info *v9ses)
{
- return v9ses->flags & V9FS_EXTENDED;
+ return v9ses->flags & V9FS_PROTO_2000L;
}
+
+/**
+ * v9fs_get_inode_from_fid - Helper routine to populate an inode by
+ * issuing a attribute request
+ * @v9ses: session information
+ * @fid: fid to issue attribute request for
+ * @sb: superblock on which to create inode
+ *
+ */
+static inline struct inode *
+v9fs_get_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
+ struct super_block *sb)
+{
+ if (v9fs_proto_dotl(v9ses))
+ return v9fs_inode_from_fid_dotl(v9ses, fid, sb, 0);
+ else
+ return v9fs_inode_from_fid(v9ses, fid, sb, 0);
+}
+
+/**
+ * v9fs_get_new_inode_from_fid - Helper routine to populate an inode by
+ * issuing a attribute request
+ * @v9ses: session information
+ * @fid: fid to issue attribute request for
+ * @sb: superblock on which to create inode
+ *
+ */
+static inline struct inode *
+v9fs_get_new_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
+ struct super_block *sb)
+{
+ if (v9fs_proto_dotl(v9ses))
+ return v9fs_inode_from_fid_dotl(v9ses, fid, sb, 1);
+ else
+ return v9fs_inode_from_fid(v9ses, fid, sb, 1);
+}
+
+#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 00:02:19 +0000