aboutsummaryrefslogtreecommitdiffstats
path: root/fs/nfsd/auth.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/nfsd/auth.c')
-rw-r--r--fs/nfsd/auth.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/nfsd/auth.c b/fs/nfsd/auth.c
index c903e04aa217..5573508f707f 100644
--- a/fs/nfsd/auth.c
+++ b/fs/nfsd/auth.c
@@ -49,6 +49,8 @@ int nfsd_setuser(struct svc_rqst *rqstp, struct svc_export *exp)
49 new->fsuid = exp->ex_anon_uid; 49 new->fsuid = exp->ex_anon_uid;
50 new->fsgid = exp->ex_anon_gid; 50 new->fsgid = exp->ex_anon_gid;
51 gi = groups_alloc(0); 51 gi = groups_alloc(0);
52 if (!gi)
53 goto oom;
52 } else if (flags & NFSEXP_ROOTSQUASH) { 54 } else if (flags & NFSEXP_ROOTSQUASH) {
53 if (!new->fsuid) 55 if (!new->fsuid)
54 new->fsuid = exp->ex_anon_uid; 56 new->fsuid = exp->ex_anon_uid;
@@ -85,6 +87,7 @@ int nfsd_setuser(struct svc_rqst *rqstp, struct svc_export *exp)
85 new->cap_effective = cap_raise_nfsd_set(new->cap_effective, 87 new->cap_effective = cap_raise_nfsd_set(new->cap_effective,
86 new->cap_permitted); 88 new->cap_permitted);
87 put_cred(override_creds(new)); 89 put_cred(override_creds(new));
90 put_cred(new);
88 return 0; 91 return 0;
89 92
90oom: 93oom:
andle fragment @fh (using at most * @max_len bytes) information that can be used by @decode_fh to recover the * file referred to by the &struct dentry @de. If the @connectable flag is * set, the encode_fh() should store sufficient information so that a good * attempt can be made to find not only the file but also it's place in the * filesystem. This typically means storing a reference to de->d_parent in * the filehandle fragment. encode_fh() should return the fileid_type on * success and on error returns 255 (if the space needed to encode fh is * greater than @max_len*4 bytes). On error @max_len contains the minimum * size(in 4 byte unit) needed to encode the file handle. * * fh_to_dentry: * @fh_to_dentry is given a &struct super_block (@sb) and a file handle * fragment (@fh, @fh_len). It should return a &struct dentry which refers * to the same file that the file handle fragment refers to. If it cannot, * it should return a %NULL pointer if the file was found but no acceptable * &dentries were available, or an %ERR_PTR error code indicating why it * couldn't be found (e.g. %ENOENT or %ENOMEM). Any suitable dentry can be * returned including, if necessary, a new dentry created with d_alloc_root. * The caller can then find any other extant dentries by following the * d_alias links. * * fh_to_parent: * Same as @fh_to_dentry, except that it returns a pointer to the parent * dentry if it was encoded into the filehandle fragment by @encode_fh. * * get_name: * @get_name should find a name for the given @child in the given @parent * directory. The name should be stored in the @name (with the * understanding that it is already pointing to a a %NAME_MAX+1 sized * buffer. get_name() should return %0 on success, a negative error code * or error. @get_name will be called without @parent->i_mutex held. * * get_parent: * @get_parent should find the parent directory for the given @child which * is also a directory. In the event that it cannot be found, or storage * space cannot be allocated, a %ERR_PTR should be returned. * * commit_metadata: * @commit_metadata should commit metadata changes to stable storage. * * Locking rules: * get_parent is called with child->d_inode->i_mutex down * get_name is not (which is possibly inconsistent) */ struct export_operations { int (*encode_fh)(struct inode *inode, __u32 *fh, int *max_len, struct inode *parent); struct dentry * (*fh_to_dentry)(struct super_block *sb, struct fid *fid, int fh_len, int fh_type); struct dentry * (*fh_to_parent)(struct super_block *sb, struct fid *fid, int fh_len, int fh_type); int (*get_name)(struct dentry *parent, char *name, struct dentry *child); struct dentry * (*get_parent)(struct dentry *child); int (*commit_metadata)(struct inode *inode); }; extern int exportfs_encode_fh(struct dentry *dentry, struct fid *fid, int *max_len, int connectable); extern struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid, int fh_len, int fileid_type, int (*acceptable)(void *, struct dentry *), void *context); /* * Generic helpers for filesystems. */ extern struct dentry *generic_fh_to_dentry(struct super_block *sb, struct fid *fid, int fh_len, int fh_type, struct inode *(*get_inode) (struct super_block *sb, u64 ino, u32 gen)); extern struct dentry *generic_fh_to_parent(struct super_block *sb, struct fid *fid, int fh_len, int fh_type, struct inode *(*get_inode) (struct super_block *sb, u64 ino, u32 gen)); #endif /* LINUX_EXPORTFS_H */