diff options
| author |   Andreas Gruenbacher <agruenba@redhat.com> | 2016-09-29 17:48:42 +0200 |
|---|---|---|
| committer |   Al Viro <viro@zeniv.linux.org.uk> | 2016-10-07 20:10:44 -0400 |
| commit | 5d6c31910bc0713e37628dc0ce677dcb13c8ccf4 (patch) | |
| tree | a28f96e71f09da2fbbde50882d56e5d5657c0ede /security/integrity | |
| parent | libfs: Use IOP_XATTR flag for empty directory handling (diff) | |
| download | linux-dev-5d6c31910bc0713e37628dc0ce677dcb13c8ccf4.tar.xz linux-dev-5d6c31910bc0713e37628dc0ce677dcb13c8ccf4.zip | |
xattr: Add __vfs_{get,set,remove}xattr helpers
Right now, various places in the kernel check for the existence of
getxattr, setxattr, and removexattr inode operations and directly call
those operations. Switch to helper functions and test for the IOP_XATTR
flag instead.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Acked-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'security/integrity')
| -rw-r--r-- | security/integrity/evm/evm_crypto.c | 7 | ||||
| -rw-r--r-- | security/integrity/evm/evm_main.c | 4 | ||||
| -rw-r--r-- | security/integrity/ima/ima_appraise.c | 21 |
3 files changed, 16 insertions, 16 deletions
diff --git a/security/integrity/evm/evm_crypto.c b/security/integrity/evm/evm_crypto.c index 11c1d30bd705..bf663915412e 100644 --- a/security/integrity/evm/evm_crypto.c +++ b/security/integrity/evm/evm_crypto.c @@ -182,8 +182,9 @@ static int evm_calc_hmac_or_hash(struct dentry *dentry, int error; int size; - if (!inode->i_op->getxattr) + if (!(inode->i_opflags & IOP_XATTR)) return -EOPNOTSUPP; + desc = init_desc(type); if (IS_ERR(desc)) return PTR_ERR(desc); @@ -253,8 +254,8 @@ int evm_update_evmxattr(struct dentry *dentry, const char *xattr_name, rc = __vfs_setxattr_noperm(dentry, XATTR_NAME_EVM, &xattr_data, sizeof(xattr_data), 0); - } else if (rc == -ENODATA && inode->i_op->removexattr) { - rc = inode->i_op->removexattr(dentry, XATTR_NAME_EVM); + } else if (rc == -ENODATA && (inode->i_opflags & IOP_XATTR)) { + rc = __vfs_removexattr(dentry, XATTR_NAME_EVM); } return rc; } diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c index b9e26288d30c..ba8615576d4d 100644 --- a/security/integrity/evm/evm_main.c +++ b/security/integrity/evm/evm_main.c @@ -78,11 +78,11 @@ static int evm_find_protected_xattrs(struct dentry *dentry) int error; int count = 0; - if (!inode->i_op->getxattr) + if (!(inode->i_opflags & IOP_XATTR)) return -EOPNOTSUPP; for (xattr = evm_config_xattrnames; *xattr != NULL; xattr++) { - error = inode->i_op->getxattr(dentry, inode, *xattr, NULL, 0); + error = __vfs_getxattr(dentry, inode, *xattr, NULL, 0); if (error < 0) { if (error == -ENODATA) continue; diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c index 4b9b4a4e1b89..0cc40af9c218 100644 --- a/security/integrity/ima/ima_appraise.c +++ b/security/integrity/ima/ima_appraise.c @@ -165,13 +165,13 @@ enum hash_algo ima_get_hash_algo(struct evm_ima_xattr_data *xattr_value, int ima_read_xattr(struct dentry *dentry, struct evm_ima_xattr_data **xattr_value) { - struct inode *inode = d_backing_inode(dentry); - - if (!inode->i_op->getxattr) - return 0; + ssize_t ret; - return vfs_getxattr_alloc(dentry, XATTR_NAME_IMA, (char **)xattr_value, - 0, GFP_NOFS); + ret = vfs_getxattr_alloc(dentry, XATTR_NAME_IMA, (char **)xattr_value, + 0, GFP_NOFS); + if (ret == -EOPNOTSUPP) + ret = 0; + return ret; } /* @@ -195,7 +195,7 @@ int ima_appraise_measurement(enum ima_hooks func, enum integrity_status status = INTEGRITY_UNKNOWN; int rc = xattr_len, hash_start = 0; - if (!inode->i_op->getxattr) + if (!(inode->i_opflags & IOP_XATTR)) return INTEGRITY_UNKNOWN; if (rc <= 0) { @@ -322,10 +322,10 @@ void ima_inode_post_setattr(struct dentry *dentry) { struct inode *inode = d_backing_inode(dentry); struct integrity_iint_cache *iint; - int must_appraise, rc; + int must_appraise; if (!(ima_policy_flag & IMA_APPRAISE) || !S_ISREG(inode->i_mode) - || !inode->i_op->removexattr) + || !(inode->i_opflags & IOP_XATTR)) return; must_appraise = ima_must_appraise(inode, MAY_ACCESS, POST_SETATTR); @@ -338,8 +338,7 @@ void ima_inode_post_setattr(struct dentry *dentry) iint->flags |= IMA_APPRAISE; } if (!must_appraise) - rc = inode->i_op->removexattr(dentry, XATTR_NAME_IMA); - return; + __vfs_removexattr(dentry, XATTR_NAME_IMA); } /* |