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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-09-13 03:37:26 +0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2011-09-14 06:44:17 +0400 |
| commit | 11fcee0293a6d9f0973e04f8b3fb6cd15a55bcce (patch) | |
| tree | f8d823a811d5806db67fe145ee79e24b279183cb /fs/nfsd/vfs.c | |
| parent | 2f1ddda1749a223d1a05e16dc6ea28632b9ec570 (diff) | |
| download | linux-11fcee0293a6d9f0973e04f8b3fb6cd15a55bcce.tar.xz | |
NFSD: Add a cache for fs_locations information
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
[ cel: since this is server-side, use nfsd4_ prefix instead of nfs4_ prefix. ]
[ cel: implement S_ISVTX filter in bfields-normal form ]
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd/vfs.c')
| -rw-r--r-- | fs/nfsd/vfs.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 75c35fa46155..4dd91283d039 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -168,6 +168,8 @@ int nfsd_mountpoint(struct dentry *dentry, struct svc_export *exp) { if (d_mountpoint(dentry)) return 1; + if (nfsd4_is_junction(dentry)) + return 1; if (!(exp->ex_flags & NFSEXP_V4ROOT)) return 0; return dentry->d_inode != NULL; @@ -592,6 +594,22 @@ nfsd4_get_nfs4_acl(struct svc_rqst *rqstp, struct dentry *dentry, struct nfs4_ac return error; } +#define NFSD_XATTR_JUNCTION_PREFIX XATTR_TRUSTED_PREFIX "junction." +#define NFSD_XATTR_JUNCTION_TYPE NFSD_XATTR_JUNCTION_PREFIX "type" +int nfsd4_is_junction(struct dentry *dentry) +{ + struct inode *inode = dentry->d_inode; + + if (inode == NULL) + return 0; + if (inode->i_mode & S_IXUGO) + return 0; + if (!(inode->i_mode & S_ISVTX)) + return 0; + if (vfs_getxattr(dentry, NFSD_XATTR_JUNCTION_TYPE, NULL, 0) <= 0) + return 0; + return 1; +} #endif /* defined(CONFIG_NFSD_V4) */ #ifdef CONFIG_NFSD_V3 |