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| author | Luis Henriques | 2018-01-05 11:47:21 +0100 |
|---|---|---|
| committer | Ilya Dryomov | 2018-04-02 11:17:52 +0200 |
| commit | 2b83845f8bd711e66e1c367a9bd56c9df3410236 (patch) | |
| tree | b2f750e237d72cc4bd2ffe80ef427ac4116d40e3 /fs/ceph/quota.c | |
| parent | ceph: quota: don't allow cross-quota renames (diff) | |
| download | kernel-qcow2-linux-2b83845f8bd711e66e1c367a9bd56c9df3410236.tar.gz kernel-qcow2-linux-2b83845f8bd711e66e1c367a9bd56c9df3410236.tar.xz kernel-qcow2-linux-2b83845f8bd711e66e1c367a9bd56c9df3410236.zip | |
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.c | 28 |
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)); +} |