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authorLuis Henriques <lhenriques@suse.com>2018-01-05 10:47:21 +0000
committerIlya Dryomov <idryomov@gmail.com>2018-04-02 11:17:52 +0200
commit2b83845f8bd711e66e1c367a9bd56c9df3410236 (patch)
treeb2f750e237d72cc4bd2ffe80ef427ac4116d40e3 /fs/ceph/quota.c
parentcafe21a4fb3075fb2980caba8fdb533a1bdb52b0 (diff)
ceph: quota: support for ceph.quota.max_bytes
Signed-off-by: Luis Henriques <lhenriques@suse.com> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph/quota.c')
-rw-r--r--fs/ceph/quota.c28
1 files changed, 27 insertions, 1 deletions
diff --git a/fs/ceph/quota.c b/fs/ceph/quota.c
index 5d7dada91a57..745f9f47027b 100644
--- a/fs/ceph/quota.c
+++ b/fs/ceph/quota.c
@@ -134,7 +134,8 @@ bool ceph_quota_is_same_realm(struct inode *old, struct inode *new)
}
enum quota_check_op {
- QUOTA_CHECK_MAX_FILES_OP /* check quota max_files limit */
+ QUOTA_CHECK_MAX_FILES_OP, /* check quota max_files limit */
+ QUOTA_CHECK_MAX_BYTES_OP /* check quota max_files limit */
};
/*
@@ -171,6 +172,9 @@ static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op,
if (op == QUOTA_CHECK_MAX_FILES_OP) {
max = ci->i_max_files;
rvalue = ci->i_rfiles + ci->i_rsubdirs;
+ } else {
+ max = ci->i_max_bytes;
+ rvalue = ci->i_rbytes;
}
is_root = (ci->i_vino.ino == CEPH_INO_ROOT);
spin_unlock(&ci->i_ceph_lock);
@@ -178,6 +182,9 @@ static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op,
case QUOTA_CHECK_MAX_FILES_OP:
exceeded = (max && (rvalue >= max));
break;
+ case QUOTA_CHECK_MAX_BYTES_OP:
+ exceeded = (max && (rvalue + delta > max));
+ break;
default:
/* Shouldn't happen */
pr_warn("Invalid quota check op (%d)\n", op);
@@ -212,3 +219,22 @@ bool ceph_quota_is_max_files_exceeded(struct inode *inode)
return check_quota_exceeded(inode, QUOTA_CHECK_MAX_FILES_OP, 0);
}
+
+/*
+ * ceph_quota_is_max_bytes_exceeded - check if we can write to a file
+ * @inode: inode being written
+ * @newsize: new size if write succeeds
+ *
+ * This functions returns true is max_bytes quota allows a file size to reach
+ * @newsize; it returns false otherwise.
+ */
+bool ceph_quota_is_max_bytes_exceeded(struct inode *inode, loff_t newsize)
+{
+ loff_t size = i_size_read(inode);
+
+ /* return immediately if we're decreasing file size */
+ if (newsize <= size)
+ return false;
+
+ return check_quota_exceeded(inode, QUOTA_CHECK_MAX_BYTES_OP, (newsize - size));
+}