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fs/9p: Fix race in initializing writeback fid

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When two process open the same file we can end up with both of them
allocating the writeback_fid. Add a new mutex which can be used
for synchronizing v9fs_inode member values.

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>
This commit is contained in:
Aneesh Kumar K.V
2011-03-08 16:39:46 +05:30
committed by Eric Van Hensbergen
parent f741a79e98
commit 5a7e0a8cf5
4 changed files with 11 additions and 0 deletions
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fs/9p/v9fs.h
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@@ -130,6 +130,7 @@ struct v9fs_inode {
#endif
unsigned int cache_validity;
struct p9_fid *writeback_fid;
struct mutex v_mutex;
struct inode vfs_inode;
};