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| author | Tejun Heo <tj@kernel.org> | 2013-11-23 23:40:02 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-04 16:34:45 +0100 |
| commit | 2322392b020badfe49730f1529b9c1a15248c387 (patch) | |
| tree | da17c0d183045351ae25f8173f2c0cfd7c7b8a55 /fs/kernfs/kernfs-internal.h | |
| parent | kernfs: update sysfs_init_inode_attrs() (diff) | |
| download | linux-2322392b020badfe49730f1529b9c1a15248c387.tar.xz linux-2322392b020badfe49730f1529b9c1a15248c387.zip | |
kernfs: implement "trusted.*" xattr support
kernfs inherited "security.*" xattr support from sysfs. This patch
extends xattr support to "trusted.*" using simple_xattr_*(). As
trusted xattrs are restricted to CAP_SYS_ADMIN, simple_xattr_*() which
uses kernel memory for storage shouldn't be problematic.
Note that the existing "security.*" support doesn't implement
get/remove/list and the this patch only implements those ops for
"trusted.*". We probably want to extend those ops to include support
for "security.*".
This patch will allow using kernfs from cgroup which requires
"trusted.*" xattr support.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: David P. Quigley <dpquigl@tycho.nsa.gov>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/kernfs/kernfs-internal.h')
| -rw-r--r-- | fs/kernfs/kernfs-internal.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h index f25b3548bcca..910e485b7333 100644 --- a/fs/kernfs/kernfs-internal.h +++ b/fs/kernfs/kernfs-internal.h @@ -14,6 +14,7 @@ #include <linux/lockdep.h> #include <linux/fs.h> #include <linux/mutex.h> +#include <linux/xattr.h> #include <linux/kernfs.h> @@ -21,6 +22,8 @@ struct sysfs_inode_attrs { struct iattr ia_iattr; void *ia_secdata; u32 ia_secdata_len; + + struct simple_xattrs xattrs; }; #define SD_DEACTIVATED_BIAS INT_MIN @@ -81,6 +84,10 @@ int sysfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat); int sysfs_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags); +int sysfs_removexattr(struct dentry *dentry, const char *name); +ssize_t sysfs_getxattr(struct dentry *dentry, const char *name, void *buf, + size_t size); +ssize_t sysfs_listxattr(struct dentry *dentry, char *buf, size_t size); void sysfs_inode_init(void); /* |