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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2011-02-28 17:04:06 +0530
committerEric Van Hensbergen <ericvh@gmail.com>2011-03-15 09:57:40 -0500
commitb3cbea03b4edbd6b625dbf813bf8c30c22213cb7 (patch)
tree8624d0c52b80b6de244bbca6f4ab35eb36d7cb62 /fs/9p/vfs_dentry.c
parent0e432703aac3b187dd88d81ac23282f7b1c71002 (diff)
fs/9p: Add support for marking inode attribute invalid
With cached mode some of the file system operation result in updating inode attributes (ctime). Add support for marking inode attribute invalid in such cases so that we fetch the updated inode attribute on dentry revalidation. 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/vfs_dentry.c')
-rw-r--r--fs/9p/vfs_dentry.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/fs/9p/vfs_dentry.c b/fs/9p/vfs_dentry.c
index a4ae4be5ab5..b6a3b9f7fe4 100644
--- a/fs/9p/vfs_dentry.c
+++ b/fs/9p/vfs_dentry.c
@@ -100,7 +100,41 @@ static void v9fs_dentry_release(struct dentry *dentry)
}
}
+static int v9fs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
+{
+ struct p9_fid *fid;
+ struct inode *inode;
+ struct v9fs_inode *v9inode;
+
+ if (nd->flags & LOOKUP_RCU)
+ return -ECHILD;
+
+ inode = dentry->d_inode;
+ if (!inode)
+ goto out_valid;
+
+ v9inode = V9FS_I(inode);
+ if (v9inode->cache_validity & V9FS_INO_INVALID_ATTR) {
+ int retval;
+ struct v9fs_session_info *v9ses;
+ fid = v9fs_fid_lookup(dentry);
+ if (IS_ERR(fid))
+ return PTR_ERR(fid);
+
+ v9ses = v9fs_inode2v9ses(inode);
+ if (v9fs_proto_dotl(v9ses))
+ retval = v9fs_refresh_inode_dotl(fid, inode);
+ else
+ retval = v9fs_refresh_inode(fid, inode);
+ if (retval <= 0)
+ return retval;
+ }
+out_valid:
+ return 1;
+}
+
const struct dentry_operations v9fs_cached_dentry_operations = {
+ .d_revalidate = v9fs_lookup_revalidate,
.d_delete = v9fs_cached_dentry_delete,
.d_release = v9fs_dentry_release,
};