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authorLinus Torvalds <torvalds@linux-foundation.org>2016-10-10 17:11:50 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-10 17:11:50 -0700
commit97d2116708ca0fd6ad8b00811ee4349b7e19e96f (patch)
tree81f73fc1a6daee60737b591cf1be73cc4f79de37 /fs/kernfs/inode.c
parent30066ce675d3af350bc5a53858991c0b518dda00 (diff)
parentfd50ecaddf8372a1d96e0daeaac0f93cf04e4d42 (diff)
Merge branch 'work.xattr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs xattr updates from Al Viro: "xattr stuff from Andreas This completes the switch to xattr_handler ->get()/->set() from ->getxattr/->setxattr/->removexattr" * 'work.xattr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: vfs: Remove {get,set,remove}xattr inode operations xattr: Stop calling {get,set,remove}xattr inode operations vfs: Check for the IOP_XATTR flag in listxattr xattr: Add __vfs_{get,set,remove}xattr helpers libfs: Use IOP_XATTR flag for empty directory handling vfs: Use IOP_XATTR flag for bad-inode handling vfs: Add IOP_XATTR inode operations flag vfs: Move xattr_resolve_name to the front of fs/xattr.c ecryptfs: Switch to generic xattr handlers sockfs: Get rid of getxattr iop sockfs: getxattr: Fail with -EOPNOTSUPP for invalid attribute names kernfs: Switch to generic xattr handlers hfs: Switch to generic xattr handlers jffs2: Remove jffs2_{get,set,remove}xattr macros xattr: Remove unnecessary NULL attribute name check
Diffstat (limited to 'fs/kernfs/inode.c')
-rw-r--r--fs/kernfs/inode.c155
1 files changed, 81 insertions, 74 deletions
diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c
index df21f5b75549..102b6f0bc7af 100644
--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -28,9 +28,6 @@ static const struct inode_operations kernfs_iops = {
.permission = kernfs_iop_permission,
.setattr = kernfs_iop_setattr,
.getattr = kernfs_iop_getattr,
- .setxattr = kernfs_iop_setxattr,
- .removexattr = kernfs_iop_removexattr,
- .getxattr = kernfs_iop_getxattr,
.listxattr = kernfs_iop_listxattr,
};
@@ -138,17 +135,12 @@ out:
return error;
}
-static int kernfs_node_setsecdata(struct kernfs_node *kn, void **secdata,
+static int kernfs_node_setsecdata(struct kernfs_iattrs *attrs, void **secdata,
u32 *secdata_len)
{
- struct kernfs_iattrs *attrs;
void *old_secdata;
size_t old_secdata_len;
- attrs = kernfs_iattrs(kn);
- if (!attrs)
- return -ENOMEM;
-
old_secdata = attrs->ia_secdata;
old_secdata_len = attrs->ia_secdata_len;
@@ -160,71 +152,6 @@ static int kernfs_node_setsecdata(struct kernfs_node *kn, void **secdata,
return 0;
}
-int kernfs_iop_setxattr(struct dentry *unused, struct inode *inode,
- const char *name, const void *value,
- size_t size, int flags)
-{
- struct kernfs_node *kn = inode->i_private;
- struct kernfs_iattrs *attrs;
- void *secdata;
- int error;
- u32 secdata_len = 0;
-
- attrs = kernfs_iattrs(kn);
- if (!attrs)
- return -ENOMEM;
-
- if (!strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN)) {
- const char *suffix = name + XATTR_SECURITY_PREFIX_LEN;
- error = security_inode_setsecurity(inode, suffix,
- value, size, flags);
- if (error)
- return error;
- error = security_inode_getsecctx(inode,
- &secdata, &secdata_len);
- if (error)
- return error;
-
- mutex_lock(&kernfs_mutex);
- error = kernfs_node_setsecdata(kn, &secdata, &secdata_len);
- mutex_unlock(&kernfs_mutex);
-
- if (secdata)
- security_release_secctx(secdata, secdata_len);
- return error;
- } else if (!strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN)) {
- return simple_xattr_set(&attrs->xattrs, name, value, size,
- flags);
- }
-
- return -EINVAL;
-}
-
-int kernfs_iop_removexattr(struct dentry *dentry, const char *name)
-{
- struct kernfs_node *kn = dentry->d_fsdata;
- struct kernfs_iattrs *attrs;
-
- attrs = kernfs_iattrs(kn);
- if (!attrs)
- return -ENOMEM;
-
- return simple_xattr_set(&attrs->xattrs, name, NULL, 0, XATTR_REPLACE);
-}
-
-ssize_t kernfs_iop_getxattr(struct dentry *unused, struct inode *inode,
- const char *name, void *buf, size_t size)
-{
- struct kernfs_node *kn = inode->i_private;
- struct kernfs_iattrs *attrs;
-
- attrs = kernfs_iattrs(kn);
- if (!attrs)
- return -ENOMEM;
-
- return simple_xattr_get(&attrs->xattrs, name, buf, size);
-}
-
ssize_t kernfs_iop_listxattr(struct dentry *dentry, char *buf, size_t size)
{
struct kernfs_node *kn = dentry->d_fsdata;
@@ -376,3 +303,83 @@ int kernfs_iop_permission(struct inode *inode, int mask)
return generic_permission(inode, mask);
}
+
+static int kernfs_xattr_get(const struct xattr_handler *handler,
+ struct dentry *unused, struct inode *inode,
+ const char *suffix, void *value, size_t size)
+{
+ const char *name = xattr_full_name(handler, suffix);
+ struct kernfs_node *kn = inode->i_private;
+ struct kernfs_iattrs *attrs;
+
+ attrs = kernfs_iattrs(kn);
+ if (!attrs)
+ return -ENOMEM;
+
+ return simple_xattr_get(&attrs->xattrs, name, value, size);
+}
+
+static int kernfs_xattr_set(const struct xattr_handler *handler,
+ struct dentry *unused, struct inode *inode,
+ const char *suffix, const void *value,
+ size_t size, int flags)
+{
+ const char *name = xattr_full_name(handler, suffix);
+ struct kernfs_node *kn = inode->i_private;
+ struct kernfs_iattrs *attrs;
+
+ attrs = kernfs_iattrs(kn);
+ if (!attrs)
+ return -ENOMEM;
+
+ return simple_xattr_set(&attrs->xattrs, name, value, size, flags);
+}
+
+const struct xattr_handler kernfs_trusted_xattr_handler = {
+ .prefix = XATTR_TRUSTED_PREFIX,
+ .get = kernfs_xattr_get,
+ .set = kernfs_xattr_set,
+};
+
+static int kernfs_security_xattr_set(const struct xattr_handler *handler,
+ struct dentry *unused, struct inode *inode,
+ const char *suffix, const void *value,
+ size_t size, int flags)
+{
+ struct kernfs_node *kn = inode->i_private;
+ struct kernfs_iattrs *attrs;
+ void *secdata;
+ u32 secdata_len = 0;
+ int error;
+
+ attrs = kernfs_iattrs(kn);
+ if (!attrs)
+ return -ENOMEM;
+
+ error = security_inode_setsecurity(inode, suffix, value, size, flags);
+ if (error)
+ return error;
+ error = security_inode_getsecctx(inode, &secdata, &secdata_len);
+ if (error)
+ return error;
+
+ mutex_lock(&kernfs_mutex);
+ error = kernfs_node_setsecdata(attrs, &secdata, &secdata_len);
+ mutex_unlock(&kernfs_mutex);
+
+ if (secdata)
+ security_release_secctx(secdata, secdata_len);
+ return error;
+}
+
+const struct xattr_handler kernfs_security_xattr_handler = {
+ .prefix = XATTR_SECURITY_PREFIX,
+ .get = kernfs_xattr_get,
+ .set = kernfs_security_xattr_set,
+};
+
+const struct xattr_handler *kernfs_xattr_handlers[] = {
+ &kernfs_trusted_xattr_handler,
+ &kernfs_security_xattr_handler,
+ NULL
+};