linux-toradex.git/fs/9p, branch v3.2.48

filesystems: add set_nlink()

2011-11-02T11:53:43+00:00

Replace remaining direct i_nlink updates with a new set_nlink()
updater function.

Signed-off-by: Miklos Szeredi 
Tested-by: Toshiyuki Okajima 
Signed-off-by: Christoph Hellwig

net/9p: Convert net/9p protocol dumps to tracepoints

2011-10-24T16:13:12+00:00

This helps in more control over debugging.
root@qemu-img-64:~# ls /pass/123
ls: cannot access /pass/123: No such file or directory
root@qemu-img-64:~# cat /sys/kernel/debug/tracing/trace
# tracer: nop
#
#           TASK-PID    CPU#    TIMESTAMP  FUNCTION
#              | |       |          |         |
              ls-1536  [001]    70.928584: 9p_protocol_dump: clnt 18446612132784021504 P9_TWALK(tag = 1)
000: 16 00 00 00 6e 01 00 01 00 00 00 02 00 00 00 01
010: 00 03 00 31 32 33 00 00 00 ff ff ff ff 00 00 00

              ls-1536  [001]    70.928587: 
 => trace_9p_protocol_dump
 => p9pdu_finalize
 => p9_client_rpc
 => p9_client_walk
 => v9fs_vfs_lookup
 => d_alloc_and_lookup
 => walk_component
 => path_lookupat
              ls-1536  [000]    70.929696: 9p_protocol_dump: clnt 18446612132784021504 P9_RLERROR(tag = 1)
000: 0b 00 00 00 07 01 00 02 00 00 00 4e 03 00 02 00
010: 00 00 00 00 03 00 02 00 00 00 00 00 ff 43 00 00

              ls-1536  [000]    70.929697: 
 => trace_9p_protocol_dump
 => p9_client_rpc
 => p9_client_walk
 => v9fs_vfs_lookup
 => d_alloc_and_lookup
 => walk_component
 => path_lookupat
 => do_path_lookup

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Eric Van Hensbergen

fs/9p: Cleanup option parsing in 9p

2011-10-24T16:13:12+00:00

Instead of saying all integer argument option should be listed in the beginning
move integer parsing to each option type.

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Eric Van Hensbergen

fs/9p: inode file operation is properly initialized init_special_inode

2011-10-24T16:13:11+00:00

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Eric Van Hensbergen

fs/9p: Update zero-copy implementation in 9p

2011-10-24T16:13:11+00:00

* remove lot of update to different data structure
* add a seperate callback for zero copy request.
* above makes non zero copy code path simpler
* remove conditionalizing TREAD/TREADDIR/TWRITE in the zero copy path
* Fix the dotu p9_check_errors with zero copy. Add sufficient doc around
* Add support for both in and output buffers in zero copy callback
* pin and unpin pages in the same context
* use helpers instead of defining page offset and rest of page ourself
* Fix mem leak in p9_check_errors
* Remove 'E' and 'F' in p9pdu_vwritef

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Eric Van Hensbergen

fs/9p: Use protocol-defined value for lock/getlock 'type' field.

2011-09-06T13:17:16+00:00

Signed-off-by: Jim Garlick 
Signed-off-by: Aneesh Kumar K.V

fs/9p: Always ask new inode in lookup for cache mode disabled

2011-09-06T13:17:15+00:00

This make sure we don't end up reusing the unlinked inode object.
The ideal way is to use inode i_generation. But i_generation is
not available in userspace always.

Signed-off-by: Aneesh Kumar K.V

fs/9p: Add OS dependent open flags in 9p protocol

2011-09-06T13:17:15+00:00

Some of the flags are OS/arch dependent we add a 9p
protocol value which maps to asm-generic/fcntl.h values in Linux
Based on the original patch from Venkateswararao Jujjuri 

Signed-off-by: Aneesh Kumar K.V

fs/9p: Don't update file type when updating file attributes

2011-09-06T13:17:14+00:00

We should only update attributes that we can change on stat2inode.
Also do file type initialization in v9fs_init_inode.

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Eric Van Hensbergen

fs/9p: Add fid before dentry instantiation

2011-09-06T13:17:14+00:00

d_instantiate marks the dentry positive. So a parallel lookup and mkdir of
the directory can find dentry that doesn't have fid attached. This can result
in both the code path doing v9fs_fid_add which results in v9fs_dentry leak.

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Eric Van Hensbergen