diff options
| author | Dave Hansen <haveblue@us.ibm.com> | 2008-02-15 14:37:34 -0800 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2008-04-19 00:25:33 -0400 |
| commit | 0622753b800e4cc6cb9319b36b27658c72dd7cdc (patch) | |
| tree | 5a32b65a087ff7fd5effa8d3f6f1f9717d4391aa /fs/nfsd/vfs.c | |
| parent | 49e0d02cf018d4edf24bfc8531a816a26367e4ce (diff) | |
| download | linux-0622753b800e4cc6cb9319b36b27658c72dd7cdc.tar.gz | |
[PATCH] r/o bind mounts: elevate write count for rmdir and unlink.
Elevate the write count during the vfs_rmdir() and vfs_unlink(). [AV: merged rmdir and unlink parts, added missing pieces in nfsd] Acked-by: Serge Hallyn <serue@us.ibm.com> Acked-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/nfsd/vfs.c')
| -rw-r--r-- | fs/nfsd/vfs.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 46f59d5365a0..efff58a5818c 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1750,6 +1750,10 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, if (!type) type = rdentry->d_inode->i_mode & S_IFMT; + host_err = mnt_want_write(fhp->fh_export->ex_path.mnt); + if (host_err) + goto out_nfserr; + if (type != S_IFDIR) { /* It's UNLINK */ #ifdef MSNFS if ((fhp->fh_export->ex_flags & NFSEXP_MSNFS) && @@ -1765,10 +1769,12 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, dput(rdentry); if (host_err) - goto out_nfserr; + goto out_drop; if (EX_ISSYNC(fhp->fh_export)) host_err = nfsd_sync_dir(dentry); +out_drop: + mnt_drop_write(fhp->fh_export->ex_path.mnt); out_nfserr: err = nfserrno(host_err); out: |