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authorAl Viro <viro@zeniv.linux.org.uk>2011-03-16 05:44:14 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2011-03-16 16:44:24 -0400
commitb1942c5f8cf3bea3a3c88a7498ae4c4361f31afe (patch)
tree0ff98cbdf75b23104df97344dcd6a35a86bbe9ec /fs/nfs/dir.c
parent0d5839ad05acd0fe2a84a39f33ac5efdf634a5a5 (diff)
downloadop-kernel-dev-b1942c5f8cf3bea3a3c88a7498ae4c4361f31afe.zip
op-kernel-dev-b1942c5f8cf3bea3a3c88a7498ae4c4361f31afe.tar.gz
nfs: store devname at disconnected NFS roots
part 2: make sure that disconnected roots have corresponding mnt_devname values stashed into them. Have nfs*_get_root() stuff a copy of devname into ->d_fsdata of the found root, provided that it is disconnected. Have ->d_release() free it when dentry goes away. Have the places where NFS uses ->d_fsdata for sillyrename (and that can *never* happen to a disconnected root - dentry will be attached to its parent) free old devname copies if they find those. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/nfs/dir.c')
-rw-r--r--fs/nfs/dir.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 2c3eb33..abdf38d 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1169,11 +1169,23 @@ static void nfs_dentry_iput(struct dentry *dentry, struct inode *inode)
iput(inode);
}
+static void nfs_d_release(struct dentry *dentry)
+{
+ /* free cached devname value, if it survived that far */
+ if (unlikely(dentry->d_fsdata)) {
+ if (dentry->d_flags & DCACHE_NFSFS_RENAMED)
+ WARN_ON(1);
+ else
+ kfree(dentry->d_fsdata);
+ }
+}
+
const struct dentry_operations nfs_dentry_operations = {
.d_revalidate = nfs_lookup_revalidate,
.d_delete = nfs_dentry_delete,
.d_iput = nfs_dentry_iput,
.d_automount = nfs_d_automount,
+ .d_release = nfs_d_release,
};
static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)
@@ -1248,6 +1260,7 @@ const struct dentry_operations nfs4_dentry_operations = {
.d_delete = nfs_dentry_delete,
.d_iput = nfs_dentry_iput,
.d_automount = nfs_d_automount,
+ .d_release = nfs_d_release,
};
/*
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