#include <linux/security.h>
#include <linux/syscalls.h>
#include <linux/module.h>
+#include <linux/fsnotify.h>
#include <asm/uaccess.h>
/*
}
}
+ down(&d->d_inode->i_sem);
+ error = security_inode_setxattr(d, kname, kvalue, size, flags);
+ if (error)
+ goto out;
error = -EOPNOTSUPP;
if (d->d_inode->i_op && d->d_inode->i_op->setxattr) {
- down(&d->d_inode->i_sem);
- error = security_inode_setxattr(d, kname, kvalue, size, flags);
- if (error)
- goto out;
- error = d->d_inode->i_op->setxattr(d, kname, kvalue, size, flags);
+ error = d->d_inode->i_op->setxattr(d, kname, kvalue,
+ size, flags);
+ if (!error) {
+ fsnotify_xattr(d);
+ security_inode_post_setxattr(d, kname, kvalue,
+ size, flags);
+ }
+ } else if (!strncmp(kname, XATTR_SECURITY_PREFIX,
+ sizeof XATTR_SECURITY_PREFIX - 1)) {
+ const char *suffix = kname + sizeof XATTR_SECURITY_PREFIX - 1;
+ error = security_inode_setsecurity(d->d_inode, suffix, kvalue,
+ size, flags);
if (!error)
- security_inode_post_setxattr(d, kname, kvalue, size, flags);
-out:
- up(&d->d_inode->i_sem);
+ fsnotify_xattr(d);
}
+out:
+ up(&d->d_inode->i_sem);
if (kvalue)
kfree(kvalue);
return error;
if (size) {
if (size > XATTR_SIZE_MAX)
size = XATTR_SIZE_MAX;
- kvalue = kmalloc(size, GFP_KERNEL);
+ kvalue = kzalloc(size, GFP_KERNEL);
if (!kvalue)
return -ENOMEM;
}
+ error = security_inode_getxattr(d, kname);
+ if (error)
+ goto out;
error = -EOPNOTSUPP;
- if (d->d_inode->i_op && d->d_inode->i_op->getxattr) {
- error = security_inode_getxattr(d, kname);
- if (error)
- goto out;
+ if (d->d_inode->i_op && d->d_inode->i_op->getxattr)
error = d->d_inode->i_op->getxattr(d, kname, kvalue, size);
- if (error > 0) {
- if (size && copy_to_user(value, kvalue, error))
- error = -EFAULT;
- } else if (error == -ERANGE && size >= XATTR_SIZE_MAX) {
- /* The file system tried to returned a value bigger
- than XATTR_SIZE_MAX bytes. Not possible. */
- error = -E2BIG;
- }
+
+ if (!strncmp(kname, XATTR_SECURITY_PREFIX,
+ sizeof XATTR_SECURITY_PREFIX - 1)) {
+ const char *suffix = kname + sizeof XATTR_SECURITY_PREFIX - 1;
+ int rv = security_inode_getsecurity(d->d_inode, suffix, kvalue,
+ size, error);
+ /* Security module active: overwrite error value */
+ if (rv != -EOPNOTSUPP)
+ error = rv;
+ }
+ if (error > 0) {
+ if (size && copy_to_user(value, kvalue, error))
+ error = -EFAULT;
+ } else if (error == -ERANGE && size >= XATTR_SIZE_MAX) {
+ /* The file system tried to returned a value bigger
+ than XATTR_SIZE_MAX bytes. Not possible. */
+ error = -E2BIG;
}
out:
if (kvalue)
return -ENOMEM;
}
+ error = security_inode_listxattr(d);
+ if (error)
+ goto out;
error = -EOPNOTSUPP;
if (d->d_inode->i_op && d->d_inode->i_op->listxattr) {
- error = security_inode_listxattr(d);
- if (error)
- goto out;
error = d->d_inode->i_op->listxattr(d, klist, size);
- if (error > 0) {
- if (size && copy_to_user(list, klist, error))
- error = -EFAULT;
- } else if (error == -ERANGE && size >= XATTR_LIST_MAX) {
- /* The file system tried to returned a list bigger
- than XATTR_LIST_MAX bytes. Not possible. */
- error = -E2BIG;
- }
+ } else {
+ error = security_inode_listsecurity(d->d_inode, klist, size);
+ if (size && error >= size)
+ error = -ERANGE;
+ }
+ if (error > 0) {
+ if (size && copy_to_user(list, klist, error))
+ error = -EFAULT;
+ } else if (error == -ERANGE && size >= XATTR_LIST_MAX) {
+ /* The file system tried to returned a list bigger
+ than XATTR_LIST_MAX bytes. Not possible. */
+ error = -E2BIG;
}
out:
if (klist)
down(&d->d_inode->i_sem);
error = d->d_inode->i_op->removexattr(d, kname);
up(&d->d_inode->i_sem);
+ if (!error)
+ fsnotify_xattr(d);
}
out:
return error;