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authorChuck Lever <chuck.lever@oracle.com>2012-01-05 01:26:43 +0400
committerJ. Bruce Fields <bfields@redhat.com>2012-01-06 00:35:57 +0400
commit9b4146e85536ebd6b989f43906986e34486efdba (patch)
tree907a6476f6106f890756fd3f8521d4c955762df2 /fs/nfsd/vfs.c
parent9689dcce0b456793c46bdeea7a79adfab1bc9c5d (diff)
downloadlinux-9b4146e85536ebd6b989f43906986e34486efdba.tar.xz
NFSD: Change name of extended attribute containing junction
As of fedfs-utils-0.8.0, user space stores all NFS junction information in a single extended attribute: "trusted.junction.nfs". Both FedFS and NFS basic junctions are stored in this one attribute, and the intention is that all future forms of NFS junction metadata will be stored in this attribute. Other protocols may use a different extended attribute. Thus NFSD needs to look only for that one extended attribute. The "trusted.junction.type" xattr is deprecated. fedfs-utils-0.8.0 will continue to attach a "trusted.junction.type" xattr to junctions, but future fedfs-utils releases may no longer do that. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd/vfs.c')
-rw-r--r--fs/nfsd/vfs.c17
1 files changed, 14 insertions, 3 deletions
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 7a2e442623c8..896891306215 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -594,8 +594,19 @@ nfsd4_get_nfs4_acl(struct svc_rqst *rqstp, struct dentry *dentry, struct nfs4_ac
return error;
}
-#define NFSD_XATTR_JUNCTION_PREFIX XATTR_TRUSTED_PREFIX "junction."
-#define NFSD_XATTR_JUNCTION_TYPE NFSD_XATTR_JUNCTION_PREFIX "type"
+/*
+ * NFS junction information is stored in an extended attribute.
+ */
+#define NFSD_JUNCTION_XATTR_NAME XATTR_TRUSTED_PREFIX "junction.nfs"
+
+/**
+ * nfsd4_is_junction - Test if an object could be an NFS junction
+ *
+ * @dentry: object to test
+ *
+ * Returns 1 if "dentry" appears to contain NFS junction information.
+ * Otherwise 0 is returned.
+ */
int nfsd4_is_junction(struct dentry *dentry)
{
struct inode *inode = dentry->d_inode;
@@ -606,7 +617,7 @@ int nfsd4_is_junction(struct dentry *dentry)
return 0;
if (!(inode->i_mode & S_ISVTX))
return 0;
- if (vfs_getxattr(dentry, NFSD_XATTR_JUNCTION_TYPE, NULL, 0) <= 0)
+ if (vfs_getxattr(dentry, NFSD_JUNCTION_XATTR_NAME, NULL, 0) <= 0)
return 0;
return 1;
}