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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2011-02-28 17:03:57 +0530 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@gmail.com> | 2011-03-15 09:57:37 -0500 |
| commit | 3cf387d780944305839f5b27c51f225444ba4d27 (patch) | |
| tree | ed4ef1d723ed3c7c280aadfcf397218004e49252 /fs/9p/fid.c | |
| parent | 17311779ac3dcd06f8ef727a06969c439e116a20 (diff) | |
| download | linux-3cf387d780944305839f5b27c51f225444ba4d27.tar.gz linux-3cf387d780944305839f5b27c51f225444ba4d27.tar.bz2 linux-3cf387d780944305839f5b27c51f225444ba4d27.zip | |
fs/9p: Add fid to inode in cached mode
The fid attached to inode will be opened O_RDWR mode and is used
for dirty page writeback only.
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 'fs/9p/fid.c')
| -rw-r--r-- | fs/9p/fid.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/fs/9p/fid.c b/fs/9p/fid.c index b00223c99d70..9d6a5d3bfe15 100644 --- a/fs/9p/fid.c +++ b/fs/9p/fid.c @@ -261,3 +261,29 @@ struct p9_fid *v9fs_fid_clone(struct dentry *dentry) ret = p9_client_walk(fid, 0, NULL, 1); return ret; } + + +struct p9_fid *v9fs_writeback_fid(struct dentry *dentry) +{ + int err; + struct p9_fid *fid; + + fid = v9fs_fid_clone(dentry); + if (IS_ERR(fid)) + goto error_out; + /* + * writeback fid will only be used to write back the + * dirty pages. We always request for the open fid in read-write + * mode so that a partial page write which result in page + * read can work. + * FIXME!!: we should make the fid owned by uid = 0 + */ + err = p9_client_open(fid, O_RDWR); + if (err < 0) { + p9_client_clunk(fid); + fid = ERR_PTR(err); + goto error_out; + } +error_out: + return fid; +} |