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| author | M. Mohan Kumar <mohan@in.ibm.com> | 2010-09-27 10:52:13 +0400 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@gmail.com> | 2010-10-28 18:08:47 +0400 |
| commit | 1d769cd192fc8c4097b1e2cd41fdee6ba3d1b2af (patch) | |
| tree | 16fd71ff9178bbfe144a28a2e168c85fb541a11b /include/net/9p | |
| parent | a099027c779068b834f335cfdc3f2bf10f531dd9 (diff) | |
| download | linux-1d769cd192fc8c4097b1e2cd41fdee6ba3d1b2af.tar.xz | |
9p: Implement TGETLOCK
Synopsis
size[4] TGetlock tag[2] fid[4] getlock[n]
size[4] RGetlock tag[2] getlock[n]
Description
TGetlock is used to test for the existence of byte range posix locks on a file
identified by given fid. The reply contains getlock structure. If the lock could
be placed it returns F_UNLCK in type field of getlock structure. Otherwise it
returns the details of the conflicting locks in the getlock structure
getlock structure:
type[1] - Type of lock: F_RDLCK, F_WRLCK
start[8] - Starting offset for lock
length[8] - Number of bytes to check for the lock
If length is 0, check for lock in all bytes starting at the location
'start' through to the end of file
pid[4] - PID of the process that wants to take lock/owns the task
in case of reply
client[4] - Client id of the system that owns the process which
has the conflicting lock
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'include/net/9p')
| -rw-r--r-- | include/net/9p/9p.h | 18 | ||||
| -rw-r--r-- | include/net/9p/client.h | 1 |
2 files changed, 19 insertions, 0 deletions
diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h index 1859a2560cc5..6367a71d84fc 100644 --- a/include/net/9p/9p.h +++ b/include/net/9p/9p.h @@ -167,6 +167,8 @@ enum p9_msg_t { P9_RFSYNC, P9_TLOCK = 52, P9_RLOCK, + P9_TGETLOCK = 54, + P9_RGETLOCK, P9_TLINK = 70, P9_RLINK, P9_TMKDIR = 72, @@ -492,6 +494,22 @@ struct p9_flock { char *client_id; }; +/* struct p9_getlock: getlock structure + * @type - type of lock + * @start - starting offset of the lock + * @length - number of bytes + * @proc_id - process id which wants to take lock + * @client_id - client id + */ + +struct p9_getlock { + u8 type; + u64 start; + u64 length; + u32 proc_id; + char *client_id; +}; + /* Structures for Protocol Operations */ struct p9_tstatfs { u32 fid; diff --git a/include/net/9p/client.h b/include/net/9p/client.h index d7dcb142e3bb..127c9f2a9cb8 100644 --- a/include/net/9p/client.h +++ b/include/net/9p/client.h @@ -250,6 +250,7 @@ int p9_client_mknod_dotl(struct p9_fid *oldfid, char *name, int mode, int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, gid_t gid, struct p9_qid *); int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status); +int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *fl); struct p9_req_t *p9_tag_lookup(struct p9_client *, u16); void p9_client_cb(struct p9_client *c, struct p9_req_t *req); |