diff options
Diffstat (limited to 'fs/9p/v9fs.h')
| -rw-r--r-- | fs/9p/v9fs.h | 106 |
1 files changed, 97 insertions, 9 deletions
diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h index cb6396855e2..099c7712631 100644 --- a/fs/9p/v9fs.h +++ b/fs/9p/v9fs.h @@ -20,6 +20,9 @@ * Boston, MA 02111-1301 USA * */ +#ifndef FS_9P_V9FS_H +#define FS_9P_V9FS_H + #include <linux/backing-dev.h> /** @@ -28,8 +31,10 @@ * @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 */ @@ -37,13 +42,15 @@ 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_PROTO_2000U = 0x01, V9FS_PROTO_2000L = 0x02, V9FS_ACCESS_SINGLE = 0x04, V9FS_ACCESS_USER = 0x08, - V9FS_ACCESS_CLIENT = 0x10 + V9FS_ACCESS_CLIENT = 0x10, + V9FS_POSIX_ACL = 0x20 }; /* possible values of ->cache */ @@ -57,6 +64,7 @@ enum p9_session_flags { enum p9_cache_modes { CACHE_NONE, + CACHE_MMAP, CACHE_LOOSE, CACHE_FSCACHE, }; @@ -102,33 +110,75 @@ struct v9fs_session_info { 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 list_head slist; /* list of sessions registered with v9fs */ struct backing_dev_info bdi; struct rw_semaphore rename_sem; }; +/* 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); -void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses); +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 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; @@ -138,3 +188,41 @@ static inline int v9fs_proto_dotl(struct v9fs_session_info *v9ses) { 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 |