diff options
| -rw-r--r-- | fs/ceph/file.c | 11 | ||||
| -rw-r--r-- | fs/ceph/inode.c | 4 | ||||
| -rw-r--r-- | fs/ceph/quota.c | 28 | ||||
| -rw-r--r-- | fs/ceph/super.h | 2 |
4 files changed, 44 insertions, 1 deletions
diff --git a/fs/ceph/file.c b/fs/ceph/file.c index c3042330e0e9..0a2843fdebbd 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -1378,6 +1378,11 @@ retry_snap: pos = iocb->ki_pos; count = iov_iter_count(from); + if (ceph_quota_is_max_bytes_exceeded(inode, pos + count)) { + err = -EDQUOT; + goto out; + } + err = file_remove_privs(file); if (err) goto out; @@ -1708,6 +1713,12 @@ static long ceph_fallocate(struct file *file, int mode, goto unlock; } + if (!(mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE)) && + ceph_quota_is_max_bytes_exceeded(inode, offset + length)) { + ret = -EDQUOT; + goto unlock; + } + if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) && !(mode & FALLOC_FL_PUNCH_HOLE)) { ret = -ENOSPC; diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 2c6f8be4ed63..50ccae151ea0 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -2147,6 +2147,10 @@ int ceph_setattr(struct dentry *dentry, struct iattr *attr) if (err != 0) return err; + if ((attr->ia_valid & ATTR_SIZE) && + ceph_quota_is_max_bytes_exceeded(inode, attr->ia_size)) + return -EDQUOT; + err = __ceph_setattr(inode, attr); if (err >= 0 && (attr->ia_valid & ATTR_MODE)) 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)); +} diff --git a/fs/ceph/super.h b/fs/ceph/super.h index eea6f70f3bf9..5870c225c2fc 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -1079,5 +1079,7 @@ extern void ceph_handle_quota(struct ceph_mds_client *mdsc, struct ceph_msg *msg); extern bool ceph_quota_is_max_files_exceeded(struct inode *inode); extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new); +extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode, + loff_t newlen); #endif /* _FS_CEPH_SUPER_H */ |