Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...

[pandora-kernel.git] / fs / nfsd / vfs.c

diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 129f3c9..fd0acca 100644 (file)
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -181,16 +181,10 @@ nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp,
        struct svc_export       *exp;
        struct dentry           *dparent;
        struct dentry           *dentry;
-       __be32                  err;
        int                     host_err;
 
        dprintk("nfsd: nfsd_lookup(fh %s, %.*s)\n", SVCFH_fmt(fhp), len,name);
 
-       /* Obtain dentry and export. */
-       err = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_EXEC);
-       if (err)
-               return err;
-
        dparent = fhp->fh_dentry;
        exp  = fhp->fh_export;
        exp_get(exp);
@@ -254,6 +248,9 @@ nfsd_lookup(struct svc_rqst *rqstp, struct svc_fh *fhp, const char *name,
        struct dentry           *dentry;
        __be32 err;
 
+       err = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_EXEC);
+       if (err)
+               return err;
        err = nfsd_lookup_dentry(rqstp, fhp, name, len, &exp, &dentry);
        if (err)
                return err;
@@ -699,7 +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.
@@ -747,12 +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;
 
@@ -877,13 +877,11 @@ static __be32
 nfsd_vfs_read(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
               loff_t offset, struct kvec *vec, int vlen, unsigned long *count)
 {
-       struct inode *inode;
        mm_segment_t    oldfs;
        __be32          err;
        int             host_err;
 
        err = nfserr_perm;
-       inode = file->f_path.dentry->d_inode;
 
        if (file->f_op->splice_read && rqstp->rq_splice_ok) {
                struct splice_desc sd = {
@@ -1340,11 +1338,18 @@ out_nfserr:
 }
 
 #ifdef CONFIG_NFSD_V3
+
+static inline int nfsd_create_is_exclusive(int createmode)
+{
+       return createmode == NFS3_CREATE_EXCLUSIVE
+              || createmode == NFS4_CREATE_EXCLUSIVE4_1;
+}
+
 /*
- * NFSv3 version of nfsd_create
+ * NFSv3 and NFSv4 version of nfsd_create
  */
 __be32
-nfsd_create_v3(struct svc_rqst *rqstp, struct svc_fh *fhp,
+do_nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
                char *fname, int flen, struct iattr *iap,
                struct svc_fh *resfhp, int createmode, u32 *verifier,
                int *truncp, int *created)
@@ -1396,7 +1401,7 @@ nfsd_create_v3(struct svc_rqst *rqstp, struct svc_fh *fhp,
        if (err)
                goto out;
 
-       if (createmode == NFS3_CREATE_EXCLUSIVE) {
+       if (nfsd_create_is_exclusive(createmode)) {
                /* solaris7 gets confused (bugid 4218508) if these have
                 * the high bit set, so just clear the high bits. If this is
                 * ever changed to use different attrs for storing the
@@ -1437,6 +1442,11 @@ nfsd_create_v3(struct svc_rqst *rqstp, struct svc_fh *fhp,
                            && dchild->d_inode->i_atime.tv_sec == v_atime
                            && dchild->d_inode->i_size  == 0 )
                                break;
+               case NFS4_CREATE_EXCLUSIVE4_1:
+                       if (   dchild->d_inode->i_mtime.tv_sec == v_mtime
+                           && dchild->d_inode->i_atime.tv_sec == v_atime
+                           && dchild->d_inode->i_size  == 0 )
+                               goto set_attr;
                         /* fallthru */
                case NFS3_CREATE_GUARDED:
                        err = nfserr_exist;
@@ -1455,7 +1465,7 @@ nfsd_create_v3(struct svc_rqst *rqstp, struct svc_fh *fhp,
 
        nfsd_check_ignore_resizing(iap);
 
-       if (createmode == NFS3_CREATE_EXCLUSIVE) {
+       if (nfsd_create_is_exclusive(createmode)) {
                /* Cram the verifier into atime/mtime */
                iap->ia_valid = ATTR_MTIME|ATTR_ATIME
                        | ATTR_MTIME_SET|ATTR_ATIME_SET;
@@ -1653,8 +1663,10 @@ nfsd_link(struct svc_rqst *rqstp, struct svc_fh *ffhp,
        if (!dold->d_inode)
                goto out_drop_write;
        host_err = nfsd_break_lease(dold->d_inode);
-       if (host_err)
+       if (host_err) {
+               err = nfserrno(host_err);
                goto out_drop_write;
+       }
        host_err = vfs_link(dold, dirp, dnew);
        if (!host_err) {
                err = nfserrno(commit_metadata(ffhp));
@@ -2034,7 +2046,7 @@ nfsd_permission(struct svc_rqst *rqstp, struct svc_export *exp,
        struct inode    *inode = dentry->d_inode;
        int             err;
 
-       if (acc == NFSD_MAY_NOP)
+       if ((acc & NFSD_MAY_MASK) == NFSD_MAY_NOP)
                return 0;
 #if 0
        dprintk("nfsd: permission 0x%x%s%s%s%s%s%s%s mode 0%o%s%s%s\n",