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authorAndreas Gruenbacher <agruenba@redhat.com>2016-08-22 17:52:55 +0200
committerMiklos Szeredi <mszeredi@redhat.com>2016-09-01 11:12:00 +0200
commit0eb45fc3bb7a2cf9c9c93d9e95986a841e5f4625 (patch)
treed88d9c499a3de864cc9ad48dfa79bfc61b27efed /fs
parentce31513a9114f74fe3e9caa6534d201bdac7238d (diff)
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ovl: Switch to generic_getxattr
Now that overlayfs has xattr handlers for iop->{set,remove}xattr, use those same handlers for iop->getxattr as well. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/overlayfs/dir.c2
-rw-r--r--fs/overlayfs/inode.c11
-rw-r--r--fs/overlayfs/overlayfs.h4
-rw-r--r--fs/overlayfs/super.c26
4 files changed, 33 insertions, 10 deletions
diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index 791c6a209656..1560fdc09a5f 100644
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -1004,7 +1004,7 @@ const struct inode_operations ovl_dir_inode_operations = {
.permission = ovl_permission,
.getattr = ovl_dir_getattr,
.setxattr = generic_setxattr,
- .getxattr = ovl_getxattr,
+ .getxattr = generic_getxattr,
.listxattr = ovl_listxattr,
.removexattr = generic_removexattr,
.get_acl = ovl_get_acl,
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 94bca710e6d2..1878591f6a2d 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -238,16 +238,13 @@ out:
return err;
}
-ssize_t ovl_getxattr(struct dentry *dentry, struct inode *inode,
- const char *name, void *value, size_t size)
+int ovl_xattr_get(struct dentry *dentry, const char *name,
+ void *value, size_t size)
{
struct dentry *realdentry = ovl_dentry_real(dentry);
ssize_t res;
const struct cred *old_cred;
- if (ovl_is_private_xattr(name))
- return -ENODATA;
-
old_cred = ovl_override_creds(dentry->d_sb);
res = vfs_getxattr(realdentry, name, value, size);
revert_creds(old_cred);
@@ -368,7 +365,7 @@ static const struct inode_operations ovl_file_inode_operations = {
.permission = ovl_permission,
.getattr = ovl_getattr,
.setxattr = generic_setxattr,
- .getxattr = ovl_getxattr,
+ .getxattr = generic_getxattr,
.listxattr = ovl_listxattr,
.removexattr = generic_removexattr,
.get_acl = ovl_get_acl,
@@ -381,7 +378,7 @@ static const struct inode_operations ovl_symlink_inode_operations = {
.readlink = ovl_readlink,
.getattr = ovl_getattr,
.setxattr = generic_setxattr,
- .getxattr = ovl_getxattr,
+ .getxattr = generic_getxattr,
.listxattr = ovl_listxattr,
.removexattr = generic_removexattr,
.update_time = ovl_update_time,
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 5769aaf151a3..5813ccff8cd9 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -187,8 +187,8 @@ int ovl_setattr(struct dentry *dentry, struct iattr *attr);
int ovl_permission(struct inode *inode, int mask);
int ovl_xattr_set(struct dentry *dentry, const char *name, const void *value,
size_t size, int flags);
-ssize_t ovl_getxattr(struct dentry *dentry, struct inode *inode,
- const char *name, void *value, size_t size);
+int ovl_xattr_get(struct dentry *dentry, const char *name,
+ void *value, size_t size);
ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size);
struct posix_acl *ovl_get_acl(struct inode *inode, int type);
int ovl_open_maybe_copy_up(struct dentry *dentry, unsigned int file_flags);
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index cba2c9fea98c..a4585f961bf9 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -987,6 +987,14 @@ static unsigned int ovl_split_lowerdirs(char *str)
}
static int __maybe_unused
+ovl_posix_acl_xattr_get(const struct xattr_handler *handler,
+ struct dentry *dentry, struct inode *inode,
+ const char *name, void *buffer, size_t size)
+{
+ return ovl_xattr_get(dentry, handler->name, buffer, size);
+}
+
+static int __maybe_unused
ovl_posix_acl_xattr_set(const struct xattr_handler *handler,
struct dentry *dentry, struct inode *inode,
const char *name, const void *value,
@@ -1029,6 +1037,13 @@ out_acl_release:
return err;
}
+static int ovl_own_xattr_get(const struct xattr_handler *handler,
+ struct dentry *dentry, struct inode *inode,
+ const char *name, void *buffer, size_t size)
+{
+ return -EPERM;
+}
+
static int ovl_own_xattr_set(const struct xattr_handler *handler,
struct dentry *dentry, struct inode *inode,
const char *name, const void *value,
@@ -1037,6 +1052,13 @@ static int ovl_own_xattr_set(const struct xattr_handler *handler,
return -EPERM;
}
+static int ovl_other_xattr_get(const struct xattr_handler *handler,
+ struct dentry *dentry, struct inode *inode,
+ const char *name, void *buffer, size_t size)
+{
+ return ovl_xattr_get(dentry, name, buffer, size);
+}
+
static int ovl_other_xattr_set(const struct xattr_handler *handler,
struct dentry *dentry, struct inode *inode,
const char *name, const void *value,
@@ -1049,6 +1071,7 @@ static const struct xattr_handler __maybe_unused
ovl_posix_acl_access_xattr_handler = {
.name = XATTR_NAME_POSIX_ACL_ACCESS,
.flags = ACL_TYPE_ACCESS,
+ .get = ovl_posix_acl_xattr_get,
.set = ovl_posix_acl_xattr_set,
};
@@ -1056,16 +1079,19 @@ static const struct xattr_handler __maybe_unused
ovl_posix_acl_default_xattr_handler = {
.name = XATTR_NAME_POSIX_ACL_DEFAULT,
.flags = ACL_TYPE_DEFAULT,
+ .get = ovl_posix_acl_xattr_get,
.set = ovl_posix_acl_xattr_set,
};
static const struct xattr_handler ovl_own_xattr_handler = {
.prefix = OVL_XATTR_PREFIX,
+ .get = ovl_own_xattr_get,
.set = ovl_own_xattr_set,
};
static const struct xattr_handler ovl_other_xattr_handler = {
.prefix = "", /* catch all */
+ .get = ovl_other_xattr_get,
.set = ovl_other_xattr_set,
};