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nfsd: fh_drop_write in nfsd_unlink

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fh_want_write() can now be called twice, but I'm also fixing up the
callers not to do that.

Other cases include setattr and create.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields 2019-04-12 16:26:30 -04:00
commit 0ca0c9d7ed
1 changed files with 5 additions and 3 deletions
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8
fs/nfsd/vfs.c
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@ -1786,12 +1786,12 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
rdentry = lookup_one_len(fname, dentry, flen);
host_err = PTR_ERR(rdentry);
if (IS_ERR(rdentry))
goto out_nfserr;
goto out_drop_write;
if (d_really_is_negative(rdentry)) {
dput(rdentry);
err = nfserr_noent;
goto out;
host_err = -ENOENT;
goto out_drop_write;
}
if (!type)
@ -1805,6 +1805,8 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
host_err = commit_metadata(fhp);
dput(rdentry);
out_drop_write:
fh_drop_write(fhp);
out_nfserr:
err = nfserrno(host_err);
out: