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Subject[patch 09/10] vfs: add path_setxattr()
From: Miklos Szeredi <mszeredi@suse.cz>

Introduce path_setxattr(). Make vfs_setxattr() static.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
---
fs/nfsd/vfs.c | 18 ++++++++++--------
fs/xattr.c | 44 ++++++++++++++++++++++----------------------
include/linux/xattr.h | 3 ++-
3 files changed, 34 insertions(+), 31 deletions(-)
Index: linux-2.6/fs/nfsd/vfs.c
===================================================================
--- linux-2.6.orig/fs/nfsd/vfs.c 2008-05-05 11:29:32.000000000 +0200
+++ linux-2.6/fs/nfsd/vfs.c 2008-05-05 11:29:33.000000000 +0200
@@ -434,7 +434,7 @@ static ssize_t nfsd_getxattr(struct dent

#if defined(CONFIG_NFSD_V4)
static int
-set_nfsv4_acl_one(struct dentry *dentry, struct posix_acl *pacl, char *key)
+set_nfsv4_acl_one(struct path *path, struct posix_acl *pacl, char *key)
{
int len;
size_t buflen;
@@ -453,7 +453,7 @@ set_nfsv4_acl_one(struct dentry *dentry,
goto out;
}

- error = vfs_setxattr(dentry, key, buf, len, 0);
+ error = path_setxattr(path, key, buf, len, 0);
out:
kfree(buf);
return error;
@@ -465,7 +465,7 @@ nfsd4_set_nfs4_acl(struct svc_rqst *rqst
{
__be32 error;
int host_error;
- struct dentry *dentry;
+ struct path path;
struct inode *inode;
struct posix_acl *pacl = NULL, *dpacl = NULL;
unsigned int flags = 0;
@@ -475,8 +475,8 @@ nfsd4_set_nfs4_acl(struct svc_rqst *rqst
if (error)
return error;

- dentry = fhp->fh_dentry;
- inode = dentry->d_inode;
+ fh_to_path(fhp, &path);
+ inode = path.dentry->d_inode;
if (S_ISDIR(inode->i_mode))
flags = NFS4_ACL_DIR;

@@ -486,12 +486,12 @@ nfsd4_set_nfs4_acl(struct svc_rqst *rqst
} else if (host_error < 0)
goto out_nfserr;

- host_error = set_nfsv4_acl_one(dentry, pacl, POSIX_ACL_XATTR_ACCESS);
+ host_error = set_nfsv4_acl_one(&path, pacl, POSIX_ACL_XATTR_ACCESS);
if (host_error < 0)
goto out_release;

if (S_ISDIR(inode->i_mode))
- host_error = set_nfsv4_acl_one(dentry, dpacl, POSIX_ACL_XATTR_DEFAULT);
+ host_error = set_nfsv4_acl_one(&path, dpacl, POSIX_ACL_XATTR_DEFAULT);

out_release:
posix_acl_release(pacl);
@@ -2038,6 +2038,7 @@ nfsd_get_posix_acl(struct svc_fh *fhp, i
int
nfsd_set_posix_acl(struct svc_fh *fhp, int type, struct posix_acl *acl)
{
+ struct path path;
struct inode *inode = fhp->fh_dentry->d_inode;
char *name;
void *value = NULL;
@@ -2073,8 +2074,9 @@ nfsd_set_posix_acl(struct svc_fh *fhp, i
error = mnt_want_write(fhp->fh_export->ex_path.mnt);
if (error)
goto getout;
+ fh_to_path(fhp, &path);
if (size)
- error = vfs_setxattr(fhp->fh_dentry, name, value, size, 0);
+ error = path_setxattr(&path, name, value, size, 0);
else {
if (!S_ISDIR(inode->i_mode) && type == ACL_TYPE_DEFAULT)
error = 0;
Index: linux-2.6/fs/xattr.c
===================================================================
--- linux-2.6.orig/fs/xattr.c 2008-05-05 11:28:37.000000000 +0200
+++ linux-2.6/fs/xattr.c 2008-05-05 11:29:33.000000000 +0200
@@ -66,7 +66,7 @@ xattr_permission(struct inode *inode, co
return permission(inode, mask, NULL);
}

-int
+static int
vfs_setxattr(struct dentry *dentry, const char *name, const void *value,
size_t size, int flags)
{
@@ -101,7 +101,20 @@ out:
mutex_unlock(&inode->i_mutex);
return error;
}
-EXPORT_SYMBOL_GPL(vfs_setxattr);
+
+int path_setxattr(struct path *path, const char *name, const void *value,
+ size_t size, int flags)
+{
+ int error = mnt_want_write(path->mnt);
+
+ if (!error) {
+ error = vfs_setxattr(path->dentry, name, value, size, flags);
+ mnt_drop_write(path->mnt);
+ }
+
+ return error;
+}
+EXPORT_SYMBOL(path_setxattr);

ssize_t
xattr_getsecurity(struct inode *inode, const char *name, void *value,
@@ -218,7 +231,7 @@ EXPORT_SYMBOL_GPL(vfs_removexattr);
* Extended attribute SET operations
*/
static long
-setxattr(struct dentry *d, const char __user *name, const void __user *value,
+setxattr(struct path *path, const char __user *name, const void __user *value,
size_t size, int flags)
{
int error;
@@ -246,7 +259,7 @@ setxattr(struct dentry *d, const char __
}
}

- error = vfs_setxattr(d, kname, kvalue, size, flags);
+ error = path_setxattr(path, kname, kvalue, size, flags);
kfree(kvalue);
return error;
}
@@ -261,11 +274,8 @@ sys_setxattr(const char __user *path, co
error = user_path_walk(path, &nd);
if (error)
return error;
- error = mnt_want_write(nd.path.mnt);
- if (!error) {
- error = setxattr(nd.path.dentry, name, value, size, flags);
- mnt_drop_write(nd.path.mnt);
- }
+
+ error = setxattr(&nd.path, name, value, size, flags);
path_put(&nd.path);
return error;
}
@@ -280,11 +290,7 @@ sys_lsetxattr(const char __user *path, c
error = user_path_walk_link(path, &nd);
if (error)
return error;
- error = mnt_want_write(nd.path.mnt);
- if (!error) {
- error = setxattr(nd.path.dentry, name, value, size, flags);
- mnt_drop_write(nd.path.mnt);
- }
+ error = setxattr(&nd.path, name, value, size, flags);
path_put(&nd.path);
return error;
}
@@ -294,19 +300,13 @@ sys_fsetxattr(int fd, const char __user
size_t size, int flags)
{
struct file *f;
- struct dentry *dentry;
int error = -EBADF;

f = fget(fd);
if (!f)
return error;
- dentry = f->f_path.dentry;
- audit_inode(NULL, dentry);
- error = mnt_want_write(f->f_path.mnt);
- if (!error) {
- error = setxattr(dentry, name, value, size, flags);
- mnt_drop_write(f->f_path.mnt);
- }
+ audit_inode(NULL, f->f_path.dentry);
+ error = setxattr(&f->f_path, name, value, size, flags);
fput(f);
return error;
}
Index: linux-2.6/include/linux/xattr.h
===================================================================
--- linux-2.6.orig/include/linux/xattr.h 2008-05-05 11:28:37.000000000 +0200
+++ linux-2.6/include/linux/xattr.h 2008-05-05 11:29:33.000000000 +0200
@@ -35,6 +35,7 @@

struct inode;
struct dentry;
+struct path;

struct xattr_handler {
char *prefix;
@@ -49,7 +50,7 @@ struct xattr_handler {
ssize_t xattr_getsecurity(struct inode *, const char *, void *, size_t);
ssize_t vfs_getxattr(struct dentry *, const char *, void *, size_t);
ssize_t vfs_listxattr(struct dentry *d, char *list, size_t size);
-int vfs_setxattr(struct dentry *, const char *, const void *, size_t, int);
+int path_setxattr(struct path *, const char *, const void *, size_t, int);
int vfs_removexattr(struct dentry *, const char *);

ssize_t generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t size);
--


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