diff options
| author | J. Bruce Fields <bfields@redhat.com> | 2011-06-07 19:50:23 +0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2011-06-20 18:38:01 +0400 |
| commit | 105f4622104848ff1ee1f644d661bef9dec3eb27 (patch) | |
| tree | b50b0fb47e9530b8d67cb8cfd717f7bbd7559138 | |
| parent | 7d751f6f8c679f51b73d01a1b5269347a929004c (diff) | |
| download | linux-105f4622104848ff1ee1f644d661bef9dec3eb27.tar.xz | |
nfsd4: fix break_lease flags on nfsd open
Thanks to Casey Bodley for pointing out that on a read open we pass 0,
instead of O_RDONLY, to break_lease, with the result that a read open is
treated like a write open for the purposes of lease breaking!
Reported-by: Casey Bodley <cbodley@citi.umich.edu>
Cc: stable@kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| -rw-r--r-- | fs/nfsd/vfs.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index f3fb61b69a1e..fd0acca5370a 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -696,7 +696,15 @@ nfsd_access(struct svc_rqst *rqstp, struct svc_fh *fhp, u32 *access, u32 *suppor } #endif /* CONFIG_NFSD_V3 */ +static int nfsd_open_break_lease(struct inode *inode, int access) +{ + unsigned int mode; + if (access & NFSD_MAY_NOT_BREAK_LEASE) + return 0; + mode = (access & NFSD_MAY_WRITE) ? O_WRONLY : O_RDONLY; + return break_lease(inode, mode | O_NONBLOCK); +} /* * Open an existing file or directory. @@ -744,12 +752,7 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, if (!inode->i_fop) goto out; - /* - * Check to see if there are any leases on this file. - * This may block while leases are broken. - */ - if (!(access & NFSD_MAY_NOT_BREAK_LEASE)) - host_err = break_lease(inode, O_NONBLOCK | ((access & NFSD_MAY_WRITE) ? O_WRONLY : 0)); + host_err = nfsd_open_break_lease(inode, access); if (host_err) /* NOMEM or WOULDBLOCK */ goto out_nfserr; |