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nfsd: distinguish functions of NFSD_MAY_* flags

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Most of the NFSD_MAY_* flags actually request permissions, but over the
years we've accreted a few that modify the behavior of the permission or
open code in other ways.

Distinguish the two cases a little more.  In particular, allow the
shortcut at the start of nfsd_permission to ignore the
non-permission-requesting bits.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields 2011-04-10 10:35:12 -04:00
parent 8985ef0b8a
commit aea93397db
2 changed files with 4 additions and 1 deletions
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2
fs/nfsd/vfs.c
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@ -2027,7 +2027,7 @@ 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",

3
fs/nfsd/vfs.h
View File

@ -17,6 +17,9 @@
#define NFSD_MAY_SATTR 8
#define NFSD_MAY_TRUNC 16
#define NFSD_MAY_LOCK 32
#define NFSD_MAY_MASK 63
/* extra hints to permission and open routines: */
#define NFSD_MAY_OWNER_OVERRIDE 64
#define NFSD_MAY_LOCAL_ACCESS 128 /* IRIX doing local access check on device special file*/
#define NFSD_MAY_BYPASS_GSS_ON_ROOT 256