*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, 2014, Intel Corporation.
+ * Copyright (c) 2011, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#ifndef _LUSTRE_COMPAT_H
#define _LUSTRE_COMPAT_H
+#include <linux/aio.h>
+#include <linux/fs.h>
#include <linux/fs_struct.h>
#include <linux/namei.h>
#include <linux/pagemap.h>
#include <linux/bio.h>
+#include <linux/xattr.h>
+#include <linux/workqueue.h>
+#include <linux/blkdev.h>
-#include <libcfs/libcfs.h>
+#include <libcfs/linux/linux-fs.h>
#include <lustre_patchless_compat.h>
+#include <obd_support.h>
#ifdef HAVE_FS_STRUCT_RWLOCK
# define LOCK_FS_STRUCT(fs) write_lock(&(fs)->lock)
# define UNLOCK_FS_STRUCT(fs) spin_unlock(&(fs)->lock)
#endif
+#ifdef HAVE_FS_STRUCT_SEQCOUNT
+# define WRITE_FS_SEQ_BEGIN(fs) write_seqcount_begin(&(fs)->seq)
+# define WRITE_FS_SEQ_END(fs) write_seqcount_end(&(fs)->seq)
+#else
+# define WRITE_FS_SEQ_BEGIN(fs)
+# define WRITE_FS_SEQ_END(fs)
+#endif
static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
struct dentry *dentry)
{
- struct path path;
- struct path old_pwd;
-
- path.mnt = mnt;
- path.dentry = dentry;
- LOCK_FS_STRUCT(fs);
- old_pwd = fs->pwd;
- path_get(&path);
- fs->pwd = path;
- UNLOCK_FS_STRUCT(fs);
-
- if (old_pwd.dentry)
- path_put(&old_pwd);
+ struct path path;
+ struct path old_pwd;
+
+ path.mnt = mnt;
+ path.dentry = dentry;
+ path_get(&path);
+ LOCK_FS_STRUCT(fs);
+ WRITE_FS_SEQ_BEGIN(fs);
+ old_pwd = fs->pwd;
+ fs->pwd = path;
+ WRITE_FS_SEQ_END(fs);
+ UNLOCK_FS_STRUCT(fs);
+
+ if (old_pwd.dentry)
+ path_put(&old_pwd);
}
-/*
- * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
- * ATTR_* attributes (see bug 13828)
- */
-#define ATTR_BLOCKS (1 << 27)
-
#define current_ngroups current_cred()->group_info->ngroups
#define current_groups current_cred()->group_info->small_block
#define SLAB_DESTROY_BY_RCU 0
#endif
+#ifndef HAVE_INIT_LIST_HEAD_RCU
+static inline void INIT_LIST_HEAD_RCU(struct list_head *list)
+{
+ WRITE_ONCE(list->next, list);
+ WRITE_ONCE(list->prev, list);
+}
+#endif
+
#ifndef HAVE_DQUOT_SUSPEND
# define ll_vfs_dq_init vfs_dq_init
# define ll_vfs_dq_drop vfs_dq_drop
#ifdef HAVE_BVEC_ITER
#define bio_idx(bio) (bio->bi_iter.bi_idx)
#define bio_set_sector(bio, sector) (bio->bi_iter.bi_sector = sector)
-#define bvl_to_page(bvl) (bvl.bv_page)
+#define bvl_to_page(bvl) (bvl->bv_page)
#else
#define bio_idx(bio) (bio->bi_idx)
#define bio_set_sector(bio, sector) (bio->bi_sector = sector)
#define bvl_to_page(bvl) (bvl->bv_page)
#endif
+#ifdef HAVE_BVEC_ITER
+#define bio_start_sector(bio) (bio->bi_iter.bi_sector)
+#else
+#define bio_start_sector(bio) (bio->bi_sector)
+#endif
+
#ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
#define blk_queue_max_segments(rq, seg) \
do { blk_queue_max_phys_segments(rq, seg); \
#define queue_max_hw_segments(rq) queue_max_segments(rq)
#endif
+#ifdef HAVE_BLK_PLUG
+#define DECLARE_PLUG(plug) struct blk_plug plug
+#else /* !HAVE_BLK_PLUG */
+#define DECLARE_PLUG(name)
+#define blk_start_plug(plug) do {} while (0)
+#define blk_finish_plug(plug) do {} while (0)
+#endif
+
#ifdef HAVE_KMAP_ATOMIC_HAS_1ARG
#define ll_kmap_atomic(a, b) kmap_atomic(a)
#define ll_kunmap_atomic(a, b) kunmap_atomic(a)
return flag;
}
-#ifdef HAVE_QC_MAKE_REQUEST_FN
-# define ll_mrf_ret blk_qc_t
-# define LL_MRF_RETURN(rc) RETURN(BLK_QC_T_NONE)
-#else
-# ifdef HAVE_VOID_MAKE_REQUEST_FN
-# define ll_mrf_ret void
-# define LL_MRF_RETURN(rc)
-# else
-# define ll_mrf_ret int
-# define LL_MRF_RETURN(rc) RETURN(rc)
-# endif
-#endif
-
#include <linux/fs.h>
#ifndef HAVE_PROTECT_I_NLINK
static inline void set_nlink(struct inode *inode, unsigned int nlink)
static inline void truncate_inode_pages_final(struct address_space *map)
{
truncate_inode_pages(map, 0);
- /* Workaround for LU-118 */
- if (map->nrpages) {
- spin_lock_irq(&map->tree_lock);
- spin_unlock_irq(&map->tree_lock);
- } /* Workaround end */
+}
+#endif
+
+#ifndef HAVE_PTR_ERR_OR_ZERO
+static inline int __must_check PTR_ERR_OR_ZERO(__force const void *ptr)
+{
+ if (IS_ERR(ptr))
+ return PTR_ERR(ptr);
+ else
+ return 0;
}
#endif
#endif
#endif
+#ifdef HAVE_PID_NS_FOR_CHILDREN
+# define ll_task_pid_ns(task) ((task)->nsproxy->pid_ns_for_children)
+#else
+# define ll_task_pid_ns(task) ((task)->nsproxy->pid_ns)
+#endif
+
+#ifdef HAVE_FULL_NAME_HASH_3ARGS
+# define ll_full_name_hash(salt, name, len) full_name_hash(salt, name, len)
+#else
+# define ll_full_name_hash(salt, name, len) full_name_hash(name, len)
+#endif
+
+#ifdef HAVE_STRUCT_POSIX_ACL_XATTR
+# define posix_acl_xattr_header struct posix_acl_xattr_header
+# define posix_acl_xattr_entry struct posix_acl_xattr_entry
+# define GET_POSIX_ACL_XATTR_ENTRY(head) ((void *)((head) + 1))
+#else
+# define GET_POSIX_ACL_XATTR_ENTRY(head) ((head)->a_entries)
+#endif
+
+#ifdef HAVE_IOP_XATTR
+#ifdef HAVE_XATTR_HANDLER_FLAGS
+#define ll_setxattr generic_setxattr
+#define ll_getxattr generic_getxattr
+#define ll_removexattr generic_removexattr
+#else
+int ll_setxattr(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags);
+ssize_t ll_getxattr(struct dentry *dentry, const char *name,
+ void *buf, size_t buf_size);
+int ll_removexattr(struct dentry *dentry, const char *name);
+#endif /* ! HAVE_XATTR_HANDLER_FLAGS */
+#endif /* HAVE_IOP_XATTR */
+
+#ifndef HAVE_VFS_SETXATTR
+const struct xattr_handler *get_xattr_type(const char *name);
+
+static inline int
+__vfs_setxattr(struct dentry *dentry, struct inode *inode, const char *name,
+ const void *value, size_t size, int flags)
+{
+# ifdef HAVE_XATTR_HANDLER_FLAGS
+ const struct xattr_handler *handler;
+ int rc;
+
+ handler = get_xattr_type(name);
+ if (!handler)
+ return -EOPNOTSUPP;
+
+# if defined(HAVE_XATTR_HANDLER_INODE_PARAM)
+ rc = handler->set(handler, dentry, inode, name, value, size, flags);
+# elif defined(HAVE_XATTR_HANDLER_SIMPLIFIED)
+ rc = handler->set(handler, dentry, name, value, size, flags);
+# else
+ rc = handler->set(dentry, name, value, size, flags, handler->flags);
+# endif /* !HAVE_XATTR_HANDLER_INODE_PARAM */
+ return rc;
+# else /* !HAVE_XATTR_HANDLER_FLAGS */
+ return ll_setxattr(dentry, name, value, size, flags);
+# endif /* HAVE_XATTR_HANDLER_FLAGS */
+}
+#endif /* HAVE_VFS_SETXATTR */
+
+#ifdef HAVE_IOP_SET_ACL
+#ifdef CONFIG_FS_POSIX_ACL
+#ifndef HAVE_POSIX_ACL_UPDATE_MODE
+static inline int posix_acl_update_mode(struct inode *inode, umode_t *mode_p,
+ struct posix_acl **acl)
+{
+ umode_t mode = inode->i_mode;
+ int error;
+
+ error = posix_acl_equiv_mode(*acl, &mode);
+ if (error < 0)
+ return error;
+ if (error == 0)
+ *acl = NULL;
+ if (!in_group_p(inode->i_gid) &&
+ !capable_wrt_inode_uidgid(inode, CAP_FSETID))
+ mode &= ~S_ISGID;
+ *mode_p = mode;
+ return 0;
+}
+#endif /* HAVE_POSIX_ACL_UPDATE_MODE */
+#endif
+#endif
+
+#ifndef HAVE_IOV_ITER_TRUNCATE
+static inline void iov_iter_truncate(struct iov_iter *i, u64 count)
+{
+ if (i->count > count)
+ i->count = count;
+}
+#endif
+
+#ifndef HAVE_IS_SXID
+static inline bool is_sxid(umode_t mode)
+{
+ return (mode & S_ISUID) || ((mode & S_ISGID) && (mode & S_IXGRP));
+}
+#endif
+
+#ifndef IS_NOSEC
+#define IS_NOSEC(inode) (!is_sxid(inode->i_mode))
+#endif
+
+#ifndef MS_NOSEC
+static inline void inode_has_no_xattr(struct inode *inode)
+{
+ return;
+}
+#endif
+
+#ifndef HAVE_FILE_OPERATIONS_READ_WRITE_ITER
+static inline void iov_iter_reexpand(struct iov_iter *i, size_t count)
+{
+ i->count = count;
+}
+
+static inline struct iovec iov_iter_iovec(const struct iov_iter *iter)
+{
+ return (struct iovec) {
+ .iov_base = iter->iov->iov_base + iter->iov_offset,
+ .iov_len = min(iter->count,
+ iter->iov->iov_len - iter->iov_offset),
+ };
+}
+
+#define iov_for_each(iov, iter, start) \
+ for (iter = (start); \
+ (iter).count && ((iov = iov_iter_iovec(&(iter))), 1); \
+ iov_iter_advance(&(iter), (iov).iov_len))
+
+static inline ssize_t
+generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
+{
+ struct iovec iov;
+ struct iov_iter i;
+ ssize_t bytes = 0;
+
+ iov_for_each(iov, i, *iter) {
+ ssize_t res;
+
+ res = generic_file_aio_read(iocb, &iov, 1, iocb->ki_pos);
+ if (res <= 0) {
+ if (bytes == 0)
+ bytes = res;
+ break;
+ }
+
+ bytes += res;
+ if (res < iov.iov_len)
+ break;
+ }
+
+ if (bytes > 0)
+ iov_iter_advance(iter, bytes);
+ return bytes;
+}
+
+static inline ssize_t
+__generic_file_write_iter(struct kiocb *iocb, struct iov_iter *iter)
+{
+ struct iovec iov;
+ struct iov_iter i;
+ ssize_t bytes = 0;
+
+ /* Since LLITE updates file size at the end of I/O in
+ * vvp_io_commit_write(), append write has to be done in atomic when
+ * there are multiple segments because otherwise each iteration to
+ * __generic_file_aio_write() will see original file size */
+ if (unlikely(iocb->ki_filp->f_flags & O_APPEND && iter->nr_segs > 1)) {
+ struct iovec *iov_copy;
+ int count = 0;
+
+ OBD_ALLOC(iov_copy, sizeof(*iov_copy) * iter->nr_segs);
+ if (!iov_copy)
+ return -ENOMEM;
+
+ iov_for_each(iov, i, *iter)
+ iov_copy[count++] = iov;
+
+ bytes = __generic_file_aio_write(iocb, iov_copy, count,
+ &iocb->ki_pos);
+ OBD_FREE(iov_copy, sizeof(*iov_copy) * iter->nr_segs);
+
+ if (bytes > 0)
+ iov_iter_advance(iter, bytes);
+ return bytes;
+ }
+
+ iov_for_each(iov, i, *iter) {
+ ssize_t res;
+
+ res = __generic_file_aio_write(iocb, &iov, 1, &iocb->ki_pos);
+ if (res <= 0) {
+ if (bytes == 0)
+ bytes = res;
+ break;
+ }
+
+ bytes += res;
+ if (res < iov.iov_len)
+ break;
+ }
+
+ if (bytes > 0)
+ iov_iter_advance(iter, bytes);
+ return bytes;
+}
+#endif /* HAVE_FILE_OPERATIONS_READ_WRITE_ITER */
+
+static inline void __user *get_vmf_address(struct vm_fault *vmf)
+{
+#ifdef HAVE_VM_FAULT_ADDRESS
+ return (void __user *)vmf->address;
+#else
+ return vmf->virtual_address;
+#endif
+}
+
+#ifdef HAVE_VM_OPS_USE_VM_FAULT_ONLY
+# define ll_filemap_fault(vma, vmf) filemap_fault(vmf)
+#else
+# define ll_filemap_fault(vma, vmf) filemap_fault(vma, vmf)
+#endif
+
+#ifndef HAVE_CURRENT_TIME
+static inline struct timespec current_time(struct inode *inode)
+{
+ return CURRENT_TIME;
+}
+#endif
+
+#ifndef time_after32
+/**
+ * time_after32 - compare two 32-bit relative times
+ * @a: the time which may be after @b
+ * @b: the time which may be before @a
+ *
+ * time_after32(a, b) returns true if the time @a is after time @b.
+ * time_before32(b, a) returns true if the time @b is before time @a.
+ *
+ * Similar to time_after(), compare two 32-bit timestamps for relative
+ * times. This is useful for comparing 32-bit seconds values that can't
+ * be converted to 64-bit values (e.g. due to disk format or wire protocol
+ * issues) when it is known that the times are less than 68 years apart.
+ */
+#define time_after32(a, b) ((s32)((u32)(b) - (u32)(a)) < 0)
+#define time_before32(b, a) time_after32(a, b)
+
+#endif
+
+#ifndef __GFP_COLD
+#define __GFP_COLD 0
+#endif
+
+#ifndef alloc_workqueue
+#define alloc_workqueue(name, flags, max_active) create_workqueue(name)
+#endif
+
+#ifndef READ_ONCE
+#define READ_ONCE ACCESS_ONCE
+#endif
+
+#ifdef HAVE_BLK_INTEGRITY_ENABLED
+static inline unsigned short blk_integrity_interval(struct blk_integrity *bi)
+{
+#ifdef HAVE_INTERVAL_EXP_BLK_INTEGRITY
+ return bi->interval_exp ? 1 << bi->interval_exp : 0;
+#elif defined(HAVE_INTERVAL_BLK_INTEGRITY)
+ return bi->interval;
+#else
+ return bi->sector_size;
+#endif
+}
+
+static inline const char *blk_integrity_name(struct blk_integrity *bi)
+{
+#ifdef HAVE_INTERVAL_EXP_BLK_INTEGRITY
+ return bi->profile->name;
+#else
+ return bi->name;
+#endif
+}
+#else
+static inline unsigned short blk_integrity_interval(struct blk_integrity *bi)
+{
+ return 0;
+}
+static inline const char *blk_integrity_name(struct blk_integrity *bi)
+{
+ /* gcc8 dislikes when strcmp() is called against NULL */
+ return "";
+}
+#endif
+
+static inline unsigned int bip_size(struct bio_integrity_payload *bip)
+{
+#ifdef HAVE_BIP_ITER_BIO_INTEGRITY_PAYLOAD
+ return bip->bip_iter.bi_size;
+#else
+ return bip->bip_size;
+#endif
+}
+
+#ifdef HAVE_BLK_INTEGRITY_ENABLED
+#ifndef INTEGRITY_FLAG_READ
+#define INTEGRITY_FLAG_READ BLK_INTEGRITY_VERIFY
+#endif
+
+#ifndef INTEGRITY_FLAG_WRITE
+#define INTEGRITY_FLAG_WRITE BLK_INTEGRITY_GENERATE
+#endif
+
+static inline bool bdev_integrity_enabled(struct block_device *bdev, int rw)
+{
+ struct blk_integrity *bi = bdev_get_integrity(bdev);
+
+ if (bi == NULL)
+ return false;
+
+#ifdef HAVE_INTERVAL_EXP_BLK_INTEGRITY
+ if (rw == 0 && bi->profile->verify_fn != NULL &&
+ (bi->flags & INTEGRITY_FLAG_READ))
+ return true;
+
+ if (rw == 1 && bi->profile->generate_fn != NULL &&
+ (bi->flags & INTEGRITY_FLAG_WRITE))
+ return true;
+#else
+ if (rw == 0 && bi->verify_fn != NULL &&
+ (bi->flags & INTEGRITY_FLAG_READ))
+ return true;
+
+ if (rw == 1 && bi->generate_fn != NULL &&
+ (bi->flags & INTEGRITY_FLAG_WRITE))
+ return true;
+#endif
+
+ return false;
+}
+#else
+static inline bool bdev_integrity_enabled(struct block_device *bdev, int rw)
+{
+ return false;
+}
+#endif /* HAVE_BLK_INTEGRITY_ENABLED */
+
+#ifdef HAVE_PAGEVEC_INIT_ONE_PARAM
+#define ll_pagevec_init(pvec, n) pagevec_init(pvec)
+#else
+#define ll_pagevec_init(pvec, n) pagevec_init(pvec, n)
+#endif
+
#endif /* _LUSTRE_COMPAT_H */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff