/** * enum p9_session_flags - option flags for each 9P session * @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_cache_shortcuts - human readable cache preferences * @CACHE_SC_NONE: disable all caches * @CACHE_SC_READAHEAD: only provide caching for readahead * @CACHE_SC_MMAP: provide caching to enable mmap * @CACHE_SC_LOOSE: non-coherent caching for files and meta data * @CACHE_SC_FSCACHE: persistent non-coherent caching for files and meta-data *
*/
/** * struct v9fs_session_info - per-instance session information * @flags: session options of type &p9_session_flags * @nodev: set to 1 to disable device mapping * @debug: debug level * @afid: authentication handle * @cache: cache mode of type &p9_cache_bits * @cachetag: the tag of the cache associated with this session * @fscache: session cookie associated with FS-Cache * @uname: string user name to mount hierarchy as * @aname: mount specifier for remote hierarchy * @maxdata: maximum data to be sent/recvd per protocol message * @dfltuid: default numeric userid to mount hierarchy as * @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 * @slist: reference to list of registered 9p sessions * * This structure holds state for each session instance established during * a sys_mount() . * * Bugs: there seems to be a lot of state which could be condensed and/or * removed.
*/
char *uname; /* user name to mount as */ char *aname; /* name of remote hierarchy being mounted */ unsignedint maxdata; /* max data for client interface */
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 rw_semaphore rename_sem; long session_lock_timeout; /* retry interval for blocking locks */
};
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