mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-31 16:38:12 +00:00
filelock: move file locking definitions to separate header file
The file locking definitions have lived in fs.h since the dawn of time, but they are only used by a small subset of the source files that include it. Move the file locking definitions to a new header file, and add the appropriate #include directives to the source files that need them. By doing this we trim down fs.h a bit and limit the amount of rebuilding that has to be done when we make changes to the file locking APIs. Reviewed-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Christian Brauner (Microsoft) <brauner@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: David Howells <dhowells@redhat.com> Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Acked-by: Chuck Lever <chuck.lever@oracle.com> Acked-by: Joseph Qi <joseph.qi@linux.alibaba.com> Acked-by: Steve French <stfrench@microsoft.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Jeff Layton <jlayton@kernel.org>
This commit is contained in:
parent
1fe4fd6f5c
commit
5970e15dbc
42 changed files with 481 additions and 429 deletions
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@ -73,6 +73,7 @@
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#include <linux/syscalls.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/cred.h>
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#include <linux/fcntl.h>
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#include <linux/eventpoll.h>
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@ -9,6 +9,7 @@
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/sched.h>
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#include <linux/file.h>
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#include <linux/stat.h>
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@ -9,6 +9,7 @@
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#include <linux/kernel.h>
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#include <linux/ktime.h>
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/pagemap.h>
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#include <linux/rxrpc.h>
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#include <linux/key.h>
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@ -14,6 +14,7 @@
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#include <linux/capability.h>
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#include <linux/fsnotify.h>
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#include <linux/fcntl.h>
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#include <linux/filelock.h>
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#include <linux/security.h>
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#include <linux/evm.h>
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#include <linux/ima.h>
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@ -9,6 +9,7 @@
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#include <linux/wait.h>
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#include <linux/writeback.h>
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#include <linux/iversion.h>
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#include <linux/filelock.h>
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#include "super.h"
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#include "mds_client.h"
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@ -7,6 +7,7 @@
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#include "super.h"
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#include "mds_client.h"
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#include <linux/filelock.h>
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#include <linux/ceph/pagelist.h>
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static u64 lock_secret;
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@ -12,6 +12,7 @@
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/mount.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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@ -26,6 +26,7 @@
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#include <uapi/linux/cifs/cifs_mount.h>
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#include "../smbfs_common/smb2pdu.h"
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#include "smb2pdu.h"
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#include <linux/filelock.h>
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#define SMB_PATH_MAX 260
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#define CIFS_PORT 445
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@ -15,6 +15,7 @@
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/* want to reuse a stale file handle and only the caller knows the file info */
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/kernel.h>
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#include <linux/vfs.h>
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#include <linux/slab.h>
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@ -9,6 +9,7 @@
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*
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*/
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/backing-dev.h>
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#include <linux/stat.h>
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#include <linux/fcntl.h>
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@ -7,6 +7,7 @@
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*
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*/
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/stat.h>
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#include <linux/slab.h>
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#include <linux/pagemap.h>
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@ -4,6 +4,7 @@
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*/
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/miscdevice.h>
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#include <linux/poll.h>
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#include <linux/dlm.h>
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#include <linux/mm.h>
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#include <linux/sched/task.h>
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/file.h>
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#include <linux/fdtable.h>
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#include <linux/capability.h>
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@ -13,6 +13,7 @@
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/security.h>
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#include <linux/cred.h>
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#include <linux/eventpoll.h>
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@ -18,6 +18,7 @@
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#include <linux/falloc.h>
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#include <linux/uio.h>
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#include <linux/fs.h>
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#include <linux/filelock.h>
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static int fuse_send_open(struct fuse_mount *fm, u64 nodeid,
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unsigned int open_flags, int opcode,
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#include <linux/mm.h>
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#include <linux/mount.h>
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/gfs2_ondisk.h>
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#include <linux/falloc.h>
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#include <linux/swap.h>
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*/
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#include <linux/export.h>
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/mm.h>
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#include <linux/backing-dev.h>
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#include <linux/hash.h>
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#include <linux/ethtool.h>
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#include <linux/falloc.h>
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#include <linux/mount.h>
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#include <linux/filelock.h>
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#include "glob.h"
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#include "smbfsctl.h"
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@ -6,6 +6,7 @@
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#include <linux/kernel.h>
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/uaccess.h>
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#include <linux/backing-dev.h>
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#include <linux/writeback.h>
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*/
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/nfs_fs.h>
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#include <linux/utsname.h>
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#include <linux/freezer.h>
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@ -3,6 +3,7 @@
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#define __LOCKD_NETNS_H__
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <net/netns/generic.h>
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struct lockd_net {
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#include <linux/capability.h>
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#include <linux/file.h>
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#include <linux/fdtable.h>
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#include <linux/filelock.h>
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/security.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/namei.h>
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#include <linux/pagemap.h>
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#include <linux/sched/mm.h>
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#include <linux/swap.h>
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#include <linux/uaccess.h>
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#include <linux/filelock.h>
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#include "delegation.h"
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#include "internal.h"
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#define NFS4_MAX_LOOP_ON_RECOVER (10)
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#include <linux/seqlock.h>
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#include <linux/filelock.h>
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struct idmap;
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#include <linux/nfs_page.h>
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#include <linux/nfs_mount.h>
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#include <linux/export.h>
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#include <linux/filelock.h>
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#include "internal.h"
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#include "pnfs.h"
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#include <linux/freezer.h>
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#include <linux/wait.h>
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#include <linux/iversion.h>
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#include <linux/filelock.h>
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#include <linux/uaccess.h>
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#include <linux/sched/mm.h>
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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#include <linux/fs.h>
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#include <linux/filelock.h>
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static unsigned int grace_net_id;
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static DEFINE_SPINLOCK(grace_lock);
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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#include <linux/filelock.h>
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#include <linux/percpu_counter.h>
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#include <linux/siphash.h>
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*/
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/fcntl.h>
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#include <cluster/masklog.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/miscdevice.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/dnotify.h>
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#include <linux/compat.h>
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#include <linux/mnt_idmapping.h>
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#include <linux/filelock.h>
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#include "internal.h"
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#include "orangefs-kernel.h"
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#include "orangefs-bufmap.h"
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/pagemap.h>
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static int flush_racache(struct inode *inode)
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#include <linux/security.h>
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#include <linux/evm.h>
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#include <linux/fsnotify.h>
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#include <linux/filelock.h>
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#include "internal.h"
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#include <linux/file.h>
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#include <linux/seq_file.h>
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/proc_fs.h>
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#include <linux/uaccess.h>
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#include <linux/compat.h>
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#include <asm/unistd.h>
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#include <linux/filelock.h>
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static bool nsec_valid(long nsec)
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{
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Copyright (c) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
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*/
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#include <linux/fs.h>
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#include <linux/filelock.h>
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#include <linux/slab.h>
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#include <linux/file.h>
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#include <linux/xattr.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/file.h>
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#include <linux/filelock.h>
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#include <linux/swap.h>
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#include <linux/errno.h>
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#include <linux/sched/signal.h>
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441
include/linux/filelock.h
Normal file
441
include/linux/filelock.h
Normal file
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_FILELOCK_H
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#define _LINUX_FILELOCK_H
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#include <linux/fs.h>
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#define FL_POSIX 1
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#define FL_FLOCK 2
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#define FL_DELEG 4 /* NFSv4 delegation */
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#define FL_ACCESS 8 /* not trying to lock, just looking */
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#define FL_EXISTS 16 /* when unlocking, test for existence */
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#define FL_LEASE 32 /* lease held on this file */
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#define FL_CLOSE 64 /* unlock on close */
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#define FL_SLEEP 128 /* A blocking lock */
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#define FL_DOWNGRADE_PENDING 256 /* Lease is being downgraded */
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#define FL_UNLOCK_PENDING 512 /* Lease is being broken */
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#define FL_OFDLCK 1024 /* lock is "owned" by struct file */
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#define FL_LAYOUT 2048 /* outstanding pNFS layout */
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#define FL_RECLAIM 4096 /* reclaiming from a reboot server */
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#define FL_CLOSE_POSIX (FL_POSIX | FL_CLOSE)
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/*
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* Special return value from posix_lock_file() and vfs_lock_file() for
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* asynchronous locking.
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*/
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#define FILE_LOCK_DEFERRED 1
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struct file_lock;
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struct file_lock_operations {
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void (*fl_copy_lock)(struct file_lock *, struct file_lock *);
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void (*fl_release_private)(struct file_lock *);
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};
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struct lock_manager_operations {
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void *lm_mod_owner;
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fl_owner_t (*lm_get_owner)(fl_owner_t);
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void (*lm_put_owner)(fl_owner_t);
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void (*lm_notify)(struct file_lock *); /* unblock callback */
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int (*lm_grant)(struct file_lock *, int);
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bool (*lm_break)(struct file_lock *);
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int (*lm_change)(struct file_lock *, int, struct list_head *);
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void (*lm_setup)(struct file_lock *, void **);
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bool (*lm_breaker_owns_lease)(struct file_lock *);
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bool (*lm_lock_expirable)(struct file_lock *cfl);
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void (*lm_expire_lock)(void);
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};
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struct lock_manager {
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struct list_head list;
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/*
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* NFSv4 and up also want opens blocked during the grace period;
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* NLM doesn't care:
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*/
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bool block_opens;
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};
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struct net;
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void locks_start_grace(struct net *, struct lock_manager *);
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void locks_end_grace(struct lock_manager *);
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bool locks_in_grace(struct net *);
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bool opens_in_grace(struct net *);
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/*
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* struct file_lock has a union that some filesystems use to track
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* their own private info. The NFS side of things is defined here:
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*/
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#include <linux/nfs_fs_i.h>
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/*
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* struct file_lock represents a generic "file lock". It's used to represent
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* POSIX byte range locks, BSD (flock) locks, and leases. It's important to
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* note that the same struct is used to represent both a request for a lock and
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* the lock itself, but the same object is never used for both.
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*
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* FIXME: should we create a separate "struct lock_request" to help distinguish
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* these two uses?
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*
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* The varous i_flctx lists are ordered by:
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*
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* 1) lock owner
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* 2) lock range start
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* 3) lock range end
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*
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* Obviously, the last two criteria only matter for POSIX locks.
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*/
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struct file_lock {
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struct file_lock *fl_blocker; /* The lock, that is blocking us */
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struct list_head fl_list; /* link into file_lock_context */
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struct hlist_node fl_link; /* node in global lists */
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struct list_head fl_blocked_requests; /* list of requests with
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* ->fl_blocker pointing here
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*/
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struct list_head fl_blocked_member; /* node in
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* ->fl_blocker->fl_blocked_requests
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*/
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fl_owner_t fl_owner;
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unsigned int fl_flags;
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unsigned char fl_type;
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unsigned int fl_pid;
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int fl_link_cpu; /* what cpu's list is this on? */
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wait_queue_head_t fl_wait;
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struct file *fl_file;
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loff_t fl_start;
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loff_t fl_end;
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struct fasync_struct * fl_fasync; /* for lease break notifications */
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/* for lease breaks: */
|
||||
unsigned long fl_break_time;
|
||||
unsigned long fl_downgrade_time;
|
||||
|
||||
const struct file_lock_operations *fl_ops; /* Callbacks for filesystems */
|
||||
const struct lock_manager_operations *fl_lmops; /* Callbacks for lockmanagers */
|
||||
union {
|
||||
struct nfs_lock_info nfs_fl;
|
||||
struct nfs4_lock_info nfs4_fl;
|
||||
struct {
|
||||
struct list_head link; /* link in AFS vnode's pending_locks list */
|
||||
int state; /* state of grant or error if -ve */
|
||||
unsigned int debug_id;
|
||||
} afs;
|
||||
struct {
|
||||
struct inode *inode;
|
||||
} ceph;
|
||||
} fl_u;
|
||||
} __randomize_layout;
|
||||
|
||||
struct file_lock_context {
|
||||
spinlock_t flc_lock;
|
||||
struct list_head flc_flock;
|
||||
struct list_head flc_posix;
|
||||
struct list_head flc_lease;
|
||||
};
|
||||
|
||||
#define locks_inode(f) file_inode(f)
|
||||
|
||||
#ifdef CONFIG_FILE_LOCKING
|
||||
int fcntl_getlk(struct file *, unsigned int, struct flock *);
|
||||
int fcntl_setlk(unsigned int, struct file *, unsigned int,
|
||||
struct flock *);
|
||||
|
||||
#if BITS_PER_LONG == 32
|
||||
int fcntl_getlk64(struct file *, unsigned int, struct flock64 *);
|
||||
int fcntl_setlk64(unsigned int, struct file *, unsigned int,
|
||||
struct flock64 *);
|
||||
#endif
|
||||
|
||||
int fcntl_setlease(unsigned int fd, struct file *filp, long arg);
|
||||
int fcntl_getlease(struct file *filp);
|
||||
|
||||
/* fs/locks.c */
|
||||
void locks_free_lock_context(struct inode *inode);
|
||||
void locks_free_lock(struct file_lock *fl);
|
||||
void locks_init_lock(struct file_lock *);
|
||||
struct file_lock * locks_alloc_lock(void);
|
||||
void locks_copy_lock(struct file_lock *, struct file_lock *);
|
||||
void locks_copy_conflock(struct file_lock *, struct file_lock *);
|
||||
void locks_remove_posix(struct file *, fl_owner_t);
|
||||
void locks_remove_file(struct file *);
|
||||
void locks_release_private(struct file_lock *);
|
||||
void posix_test_lock(struct file *, struct file_lock *);
|
||||
int posix_lock_file(struct file *, struct file_lock *, struct file_lock *);
|
||||
int locks_delete_block(struct file_lock *);
|
||||
int vfs_test_lock(struct file *, struct file_lock *);
|
||||
int vfs_lock_file(struct file *, unsigned int, struct file_lock *, struct file_lock *);
|
||||
int vfs_cancel_lock(struct file *filp, struct file_lock *fl);
|
||||
bool vfs_inode_has_locks(struct inode *inode);
|
||||
int locks_lock_inode_wait(struct inode *inode, struct file_lock *fl);
|
||||
int __break_lease(struct inode *inode, unsigned int flags, unsigned int type);
|
||||
void lease_get_mtime(struct inode *, struct timespec64 *time);
|
||||
int generic_setlease(struct file *, long, struct file_lock **, void **priv);
|
||||
int vfs_setlease(struct file *, long, struct file_lock **, void **);
|
||||
int lease_modify(struct file_lock *, int, struct list_head *);
|
||||
|
||||
struct notifier_block;
|
||||
int lease_register_notifier(struct notifier_block *);
|
||||
void lease_unregister_notifier(struct notifier_block *);
|
||||
|
||||
struct files_struct;
|
||||
void show_fd_locks(struct seq_file *f,
|
||||
struct file *filp, struct files_struct *files);
|
||||
bool locks_owner_has_blockers(struct file_lock_context *flctx,
|
||||
fl_owner_t owner);
|
||||
|
||||
static inline struct file_lock_context *
|
||||
locks_inode_context(const struct inode *inode)
|
||||
{
|
||||
return smp_load_acquire(&inode->i_flctx);
|
||||
}
|
||||
|
||||
#else /* !CONFIG_FILE_LOCKING */
|
||||
static inline int fcntl_getlk(struct file *file, unsigned int cmd,
|
||||
struct flock __user *user)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static inline int fcntl_setlk(unsigned int fd, struct file *file,
|
||||
unsigned int cmd, struct flock __user *user)
|
||||
{
|
||||
return -EACCES;
|
||||
}
|
||||
|
||||
#if BITS_PER_LONG == 32
|
||||
static inline int fcntl_getlk64(struct file *file, unsigned int cmd,
|
||||
struct flock64 *user)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static inline int fcntl_setlk64(unsigned int fd, struct file *file,
|
||||
unsigned int cmd, struct flock64 *user)
|
||||
{
|
||||
return -EACCES;
|
||||
}
|
||||
#endif
|
||||
static inline int fcntl_setlease(unsigned int fd, struct file *filp, long arg)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static inline int fcntl_getlease(struct file *filp)
|
||||
{
|
||||
return F_UNLCK;
|
||||
}
|
||||
|
||||
static inline void
|
||||
locks_free_lock_context(struct inode *inode)
|
||||
{
|
||||
}
|
||||
|
||||
static inline void locks_init_lock(struct file_lock *fl)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
static inline void locks_copy_conflock(struct file_lock *new, struct file_lock *fl)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
static inline void locks_copy_lock(struct file_lock *new, struct file_lock *fl)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
static inline void locks_remove_posix(struct file *filp, fl_owner_t owner)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
static inline void locks_remove_file(struct file *filp)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
static inline void posix_test_lock(struct file *filp, struct file_lock *fl)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
static inline int posix_lock_file(struct file *filp, struct file_lock *fl,
|
||||
struct file_lock *conflock)
|
||||
{
|
||||
return -ENOLCK;
|
||||
}
|
||||
|
||||
static inline int locks_delete_block(struct file_lock *waiter)
|
||||
{
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
static inline int vfs_test_lock(struct file *filp, struct file_lock *fl)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int vfs_lock_file(struct file *filp, unsigned int cmd,
|
||||
struct file_lock *fl, struct file_lock *conf)
|
||||
{
|
||||
return -ENOLCK;
|
||||
}
|
||||
|
||||
static inline int vfs_cancel_lock(struct file *filp, struct file_lock *fl)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline bool vfs_inode_has_locks(struct inode *inode)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
static inline int locks_lock_inode_wait(struct inode *inode, struct file_lock *fl)
|
||||
{
|
||||
return -ENOLCK;
|
||||
}
|
||||
|
||||
static inline int __break_lease(struct inode *inode, unsigned int mode, unsigned int type)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void lease_get_mtime(struct inode *inode,
|
||||
struct timespec64 *time)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
static inline int generic_setlease(struct file *filp, long arg,
|
||||
struct file_lock **flp, void **priv)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static inline int vfs_setlease(struct file *filp, long arg,
|
||||
struct file_lock **lease, void **priv)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static inline int lease_modify(struct file_lock *fl, int arg,
|
||||
struct list_head *dispose)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
struct files_struct;
|
||||
static inline void show_fd_locks(struct seq_file *f,
|
||||
struct file *filp, struct files_struct *files) {}
|
||||
static inline bool locks_owner_has_blockers(struct file_lock_context *flctx,
|
||||
fl_owner_t owner)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
static inline struct file_lock_context *
|
||||
locks_inode_context(const struct inode *inode)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
#endif /* !CONFIG_FILE_LOCKING */
|
||||
|
||||
static inline int locks_lock_file_wait(struct file *filp, struct file_lock *fl)
|
||||
{
|
||||
return locks_lock_inode_wait(locks_inode(filp), fl);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_FILE_LOCKING
|
||||
static inline int break_lease(struct inode *inode, unsigned int mode)
|
||||
{
|
||||
/*
|
||||
* Since this check is lockless, we must ensure that any refcounts
|
||||
* taken are done before checking i_flctx->flc_lease. Otherwise, we
|
||||
* could end up racing with tasks trying to set a new lease on this
|
||||
* file.
|
||||
*/
|
||||
smp_mb();
|
||||
if (inode->i_flctx && !list_empty_careful(&inode->i_flctx->flc_lease))
|
||||
return __break_lease(inode, mode, FL_LEASE);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int break_deleg(struct inode *inode, unsigned int mode)
|
||||
{
|
||||
/*
|
||||
* Since this check is lockless, we must ensure that any refcounts
|
||||
* taken are done before checking i_flctx->flc_lease. Otherwise, we
|
||||
* could end up racing with tasks trying to set a new lease on this
|
||||
* file.
|
||||
*/
|
||||
smp_mb();
|
||||
if (inode->i_flctx && !list_empty_careful(&inode->i_flctx->flc_lease))
|
||||
return __break_lease(inode, mode, FL_DELEG);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int try_break_deleg(struct inode *inode, struct inode **delegated_inode)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = break_deleg(inode, O_WRONLY|O_NONBLOCK);
|
||||
if (ret == -EWOULDBLOCK && delegated_inode) {
|
||||
*delegated_inode = inode;
|
||||
ihold(inode);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
static inline int break_deleg_wait(struct inode **delegated_inode)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = break_deleg(*delegated_inode, O_WRONLY);
|
||||
iput(*delegated_inode);
|
||||
*delegated_inode = NULL;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static inline int break_layout(struct inode *inode, bool wait)
|
||||
{
|
||||
smp_mb();
|
||||
if (inode->i_flctx && !list_empty_careful(&inode->i_flctx->flc_lease))
|
||||
return __break_lease(inode,
|
||||
wait ? O_WRONLY : O_WRONLY | O_NONBLOCK,
|
||||
FL_LAYOUT);
|
||||
return 0;
|
||||
}
|
||||
|
||||
#else /* !CONFIG_FILE_LOCKING */
|
||||
static inline int break_lease(struct inode *inode, unsigned int mode)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int break_deleg(struct inode *inode, unsigned int mode)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int try_break_deleg(struct inode *inode, struct inode **delegated_inode)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int break_deleg_wait(struct inode **delegated_inode)
|
||||
{
|
||||
BUG();
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int break_layout(struct inode *inode, bool wait)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif /* CONFIG_FILE_LOCKING */
|
||||
|
||||
#endif /* _LINUX_FILELOCK_H */
|
|
@ -1003,135 +1003,11 @@ static inline struct file *get_file(struct file *f)
|
|||
#define MAX_LFS_FILESIZE ((loff_t)LLONG_MAX)
|
||||
#endif
|
||||
|
||||
#define FL_POSIX 1
|
||||
#define FL_FLOCK 2
|
||||
#define FL_DELEG 4 /* NFSv4 delegation */
|
||||
#define FL_ACCESS 8 /* not trying to lock, just looking */
|
||||
#define FL_EXISTS 16 /* when unlocking, test for existence */
|
||||
#define FL_LEASE 32 /* lease held on this file */
|
||||
#define FL_CLOSE 64 /* unlock on close */
|
||||
#define FL_SLEEP 128 /* A blocking lock */
|
||||
#define FL_DOWNGRADE_PENDING 256 /* Lease is being downgraded */
|
||||
#define FL_UNLOCK_PENDING 512 /* Lease is being broken */
|
||||
#define FL_OFDLCK 1024 /* lock is "owned" by struct file */
|
||||
#define FL_LAYOUT 2048 /* outstanding pNFS layout */
|
||||
#define FL_RECLAIM 4096 /* reclaiming from a reboot server */
|
||||
|
||||
#define FL_CLOSE_POSIX (FL_POSIX | FL_CLOSE)
|
||||
|
||||
/*
|
||||
* Special return value from posix_lock_file() and vfs_lock_file() for
|
||||
* asynchronous locking.
|
||||
*/
|
||||
#define FILE_LOCK_DEFERRED 1
|
||||
|
||||
/* legacy typedef, should eventually be removed */
|
||||
typedef void *fl_owner_t;
|
||||
|
||||
struct file_lock;
|
||||
|
||||
struct file_lock_operations {
|
||||
void (*fl_copy_lock)(struct file_lock *, struct file_lock *);
|
||||
void (*fl_release_private)(struct file_lock *);
|
||||
};
|
||||
|
||||
struct lock_manager_operations {
|
||||
void *lm_mod_owner;
|
||||
fl_owner_t (*lm_get_owner)(fl_owner_t);
|
||||
void (*lm_put_owner)(fl_owner_t);
|
||||
void (*lm_notify)(struct file_lock *); /* unblock callback */
|
||||
int (*lm_grant)(struct file_lock *, int);
|
||||
bool (*lm_break)(struct file_lock *);
|
||||
int (*lm_change)(struct file_lock *, int, struct list_head *);
|
||||
void (*lm_setup)(struct file_lock *, void **);
|
||||
bool (*lm_breaker_owns_lease)(struct file_lock *);
|
||||
bool (*lm_lock_expirable)(struct file_lock *cfl);
|
||||
void (*lm_expire_lock)(void);
|
||||
};
|
||||
|
||||
struct lock_manager {
|
||||
struct list_head list;
|
||||
/*
|
||||
* NFSv4 and up also want opens blocked during the grace period;
|
||||
* NLM doesn't care:
|
||||
*/
|
||||
bool block_opens;
|
||||
};
|
||||
|
||||
struct net;
|
||||
void locks_start_grace(struct net *, struct lock_manager *);
|
||||
void locks_end_grace(struct lock_manager *);
|
||||
bool locks_in_grace(struct net *);
|
||||
bool opens_in_grace(struct net *);
|
||||
|
||||
/* that will die - we need it for nfs_lock_info */
|
||||
#include <linux/nfs_fs_i.h>
|
||||
|
||||
/*
|
||||
* struct file_lock represents a generic "file lock". It's used to represent
|
||||
* POSIX byte range locks, BSD (flock) locks, and leases. It's important to
|
||||
* note that the same struct is used to represent both a request for a lock and
|
||||
* the lock itself, but the same object is never used for both.
|
||||
*
|
||||
* FIXME: should we create a separate "struct lock_request" to help distinguish
|
||||
* these two uses?
|
||||
*
|
||||
* The varous i_flctx lists are ordered by:
|
||||
*
|
||||
* 1) lock owner
|
||||
* 2) lock range start
|
||||
* 3) lock range end
|
||||
*
|
||||
* Obviously, the last two criteria only matter for POSIX locks.
|
||||
*/
|
||||
struct file_lock {
|
||||
struct file_lock *fl_blocker; /* The lock, that is blocking us */
|
||||
struct list_head fl_list; /* link into file_lock_context */
|
||||
struct hlist_node fl_link; /* node in global lists */
|
||||
struct list_head fl_blocked_requests; /* list of requests with
|
||||
* ->fl_blocker pointing here
|
||||
*/
|
||||
struct list_head fl_blocked_member; /* node in
|
||||
* ->fl_blocker->fl_blocked_requests
|
||||
*/
|
||||
fl_owner_t fl_owner;
|
||||
unsigned int fl_flags;
|
||||
unsigned char fl_type;
|
||||
unsigned int fl_pid;
|
||||
int fl_link_cpu; /* what cpu's list is this on? */
|
||||
wait_queue_head_t fl_wait;
|
||||
struct file *fl_file;
|
||||
loff_t fl_start;
|
||||
loff_t fl_end;
|
||||
|
||||
struct fasync_struct * fl_fasync; /* for lease break notifications */
|
||||
/* for lease breaks: */
|
||||
unsigned long fl_break_time;
|
||||
unsigned long fl_downgrade_time;
|
||||
|
||||
const struct file_lock_operations *fl_ops; /* Callbacks for filesystems */
|
||||
const struct lock_manager_operations *fl_lmops; /* Callbacks for lockmanagers */
|
||||
union {
|
||||
struct nfs_lock_info nfs_fl;
|
||||
struct nfs4_lock_info nfs4_fl;
|
||||
struct {
|
||||
struct list_head link; /* link in AFS vnode's pending_locks list */
|
||||
int state; /* state of grant or error if -ve */
|
||||
unsigned int debug_id;
|
||||
} afs;
|
||||
struct {
|
||||
struct inode *inode;
|
||||
} ceph;
|
||||
} fl_u;
|
||||
} __randomize_layout;
|
||||
|
||||
struct file_lock_context {
|
||||
spinlock_t flc_lock;
|
||||
struct list_head flc_flock;
|
||||
struct list_head flc_posix;
|
||||
struct list_head flc_lease;
|
||||
};
|
||||
|
||||
/* The following constant reflects the upper bound of the file/locking space */
|
||||
#ifndef OFFSET_MAX
|
||||
#define OFFSET_MAX type_max(loff_t)
|
||||
|
@ -1140,216 +1016,6 @@ struct file_lock_context {
|
|||
|
||||
extern void send_sigio(struct fown_struct *fown, int fd, int band);
|
||||
|
||||
#define locks_inode(f) file_inode(f)
|
||||
|
||||
#ifdef CONFIG_FILE_LOCKING
|
||||
extern int fcntl_getlk(struct file *, unsigned int, struct flock *);
|
||||
extern int fcntl_setlk(unsigned int, struct file *, unsigned int,
|
||||
struct flock *);
|
||||
|
||||
#if BITS_PER_LONG == 32
|
||||
extern int fcntl_getlk64(struct file *, unsigned int, struct flock64 *);
|
||||
extern int fcntl_setlk64(unsigned int, struct file *, unsigned int,
|
||||
struct flock64 *);
|
||||
#endif
|
||||
|
||||
extern int fcntl_setlease(unsigned int fd, struct file *filp, long arg);
|
||||
extern int fcntl_getlease(struct file *filp);
|
||||
|
||||
/* fs/locks.c */
|
||||
void locks_free_lock_context(struct inode *inode);
|
||||
void locks_free_lock(struct file_lock *fl);
|
||||
extern void locks_init_lock(struct file_lock *);
|
||||
extern struct file_lock * locks_alloc_lock(void);
|
||||
extern void locks_copy_lock(struct file_lock *, struct file_lock *);
|
||||
extern void locks_copy_conflock(struct file_lock *, struct file_lock *);
|
||||
extern void locks_remove_posix(struct file *, fl_owner_t);
|
||||
extern void locks_remove_file(struct file *);
|
||||
extern void locks_release_private(struct file_lock *);
|
||||
extern void posix_test_lock(struct file *, struct file_lock *);
|
||||
extern int posix_lock_file(struct file *, struct file_lock *, struct file_lock *);
|
||||
extern int locks_delete_block(struct file_lock *);
|
||||
extern int vfs_test_lock(struct file *, struct file_lock *);
|
||||
extern int vfs_lock_file(struct file *, unsigned int, struct file_lock *, struct file_lock *);
|
||||
extern int vfs_cancel_lock(struct file *filp, struct file_lock *fl);
|
||||
bool vfs_inode_has_locks(struct inode *inode);
|
||||
extern int locks_lock_inode_wait(struct inode *inode, struct file_lock *fl);
|
||||
extern int __break_lease(struct inode *inode, unsigned int flags, unsigned int type);
|
||||
extern void lease_get_mtime(struct inode *, struct timespec64 *time);
|
||||
extern int generic_setlease(struct file *, long, struct file_lock **, void **priv);
|
||||
extern int vfs_setlease(struct file *, long, struct file_lock **, void **);
|
||||
extern int lease_modify(struct file_lock *, int, struct list_head *);
|
||||
|
||||
struct notifier_block;
|
||||
extern int lease_register_notifier(struct notifier_block *);
|
||||
extern void lease_unregister_notifier(struct notifier_block *);
|
||||
|
||||
struct files_struct;
|
||||
extern void show_fd_locks(struct seq_file *f,
|
||||
struct file *filp, struct files_struct *files);
|
||||
extern bool locks_owner_has_blockers(struct file_lock_context *flctx,
|
||||
fl_owner_t owner);
|
||||
|
||||
static inline struct file_lock_context *
|
||||
locks_inode_context(const struct inode *inode)
|
||||
{
|
||||
return smp_load_acquire(&inode->i_flctx);
|
||||
}
|
||||
|
||||
#else /* !CONFIG_FILE_LOCKING */
|
||||
static inline int fcntl_getlk(struct file *file, unsigned int cmd,
|
||||
struct flock __user *user)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static inline int fcntl_setlk(unsigned int fd, struct file *file,
|
||||
unsigned int cmd, struct flock __user *user)
|
||||
{
|
||||
return -EACCES;
|
||||
}
|
||||
|
||||
#if BITS_PER_LONG == 32
|
||||
static inline int fcntl_getlk64(struct file *file, unsigned int cmd,
|
||||
struct flock64 *user)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static inline int fcntl_setlk64(unsigned int fd, struct file *file,
|
||||
unsigned int cmd, struct flock64 *user)
|
||||
{
|
||||
return -EACCES;
|
||||
}
|
||||
#endif
|
||||
static inline int fcntl_setlease(unsigned int fd, struct file *filp, long arg)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static inline int fcntl_getlease(struct file *filp)
|
||||
{
|
||||
return F_UNLCK;
|
||||
}
|
||||
|
||||
static inline void
|
||||
locks_free_lock_context(struct inode *inode)
|
||||
{
|
||||
}
|
||||
|
||||
static inline void locks_init_lock(struct file_lock *fl)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
static inline void locks_copy_conflock(struct file_lock *new, struct file_lock *fl)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
static inline void locks_copy_lock(struct file_lock *new, struct file_lock *fl)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
static inline void locks_remove_posix(struct file *filp, fl_owner_t owner)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
static inline void locks_remove_file(struct file *filp)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
static inline void posix_test_lock(struct file *filp, struct file_lock *fl)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
static inline int posix_lock_file(struct file *filp, struct file_lock *fl,
|
||||
struct file_lock *conflock)
|
||||
{
|
||||
return -ENOLCK;
|
||||
}
|
||||
|
||||
static inline int locks_delete_block(struct file_lock *waiter)
|
||||
{
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
static inline int vfs_test_lock(struct file *filp, struct file_lock *fl)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int vfs_lock_file(struct file *filp, unsigned int cmd,
|
||||
struct file_lock *fl, struct file_lock *conf)
|
||||
{
|
||||
return -ENOLCK;
|
||||
}
|
||||
|
||||
static inline int vfs_cancel_lock(struct file *filp, struct file_lock *fl)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline bool vfs_inode_has_locks(struct inode *inode)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
static inline int locks_lock_inode_wait(struct inode *inode, struct file_lock *fl)
|
||||
{
|
||||
return -ENOLCK;
|
||||
}
|
||||
|
||||
static inline int __break_lease(struct inode *inode, unsigned int mode, unsigned int type)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void lease_get_mtime(struct inode *inode,
|
||||
struct timespec64 *time)
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
static inline int generic_setlease(struct file *filp, long arg,
|
||||
struct file_lock **flp, void **priv)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static inline int vfs_setlease(struct file *filp, long arg,
|
||||
struct file_lock **lease, void **priv)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static inline int lease_modify(struct file_lock *fl, int arg,
|
||||
struct list_head *dispose)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
struct files_struct;
|
||||
static inline void show_fd_locks(struct seq_file *f,
|
||||
struct file *filp, struct files_struct *files) {}
|
||||
static inline bool locks_owner_has_blockers(struct file_lock_context *flctx,
|
||||
fl_owner_t owner)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
static inline struct file_lock_context *
|
||||
locks_inode_context(const struct inode *inode)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
#endif /* !CONFIG_FILE_LOCKING */
|
||||
|
||||
static inline struct inode *file_inode(const struct file *f)
|
||||
{
|
||||
return f->f_inode;
|
||||
|
@ -1360,11 +1026,6 @@ static inline struct dentry *file_dentry(const struct file *file)
|
|||
return d_real(file->f_path.dentry, file_inode(file));
|
||||
}
|
||||
|
||||
static inline int locks_lock_file_wait(struct file *filp, struct file_lock *fl)
|
||||
{
|
||||
return locks_lock_inode_wait(locks_inode(filp), fl);
|
||||
}
|
||||
|
||||
struct fasync_struct {
|
||||
rwlock_t fa_lock;
|
||||
int magic;
|
||||
|
@ -2624,96 +2285,6 @@ extern struct kobject *fs_kobj;
|
|||
|
||||
#define MAX_RW_COUNT (INT_MAX & PAGE_MASK)
|
||||
|
||||
#ifdef CONFIG_FILE_LOCKING
|
||||
static inline int break_lease(struct inode *inode, unsigned int mode)
|
||||
{
|
||||
/*
|
||||
* Since this check is lockless, we must ensure that any refcounts
|
||||
* taken are done before checking i_flctx->flc_lease. Otherwise, we
|
||||
* could end up racing with tasks trying to set a new lease on this
|
||||
* file.
|
||||
*/
|
||||
smp_mb();
|
||||
if (inode->i_flctx && !list_empty_careful(&inode->i_flctx->flc_lease))
|
||||
return __break_lease(inode, mode, FL_LEASE);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int break_deleg(struct inode *inode, unsigned int mode)
|
||||
{
|
||||
/*
|
||||
* Since this check is lockless, we must ensure that any refcounts
|
||||
* taken are done before checking i_flctx->flc_lease. Otherwise, we
|
||||
* could end up racing with tasks trying to set a new lease on this
|
||||
* file.
|
||||
*/
|
||||
smp_mb();
|
||||
if (inode->i_flctx && !list_empty_careful(&inode->i_flctx->flc_lease))
|
||||
return __break_lease(inode, mode, FL_DELEG);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int try_break_deleg(struct inode *inode, struct inode **delegated_inode)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = break_deleg(inode, O_WRONLY|O_NONBLOCK);
|
||||
if (ret == -EWOULDBLOCK && delegated_inode) {
|
||||
*delegated_inode = inode;
|
||||
ihold(inode);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
static inline int break_deleg_wait(struct inode **delegated_inode)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = break_deleg(*delegated_inode, O_WRONLY);
|
||||
iput(*delegated_inode);
|
||||
*delegated_inode = NULL;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static inline int break_layout(struct inode *inode, bool wait)
|
||||
{
|
||||
smp_mb();
|
||||
if (inode->i_flctx && !list_empty_careful(&inode->i_flctx->flc_lease))
|
||||
return __break_lease(inode,
|
||||
wait ? O_WRONLY : O_WRONLY | O_NONBLOCK,
|
||||
FL_LAYOUT);
|
||||
return 0;
|
||||
}
|
||||
|
||||
#else /* !CONFIG_FILE_LOCKING */
|
||||
static inline int break_lease(struct inode *inode, unsigned int mode)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int break_deleg(struct inode *inode, unsigned int mode)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int try_break_deleg(struct inode *inode, struct inode **delegated_inode)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int break_deleg_wait(struct inode **delegated_inode)
|
||||
{
|
||||
BUG();
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int break_layout(struct inode *inode, bool wait)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif /* CONFIG_FILE_LOCKING */
|
||||
|
||||
/* fs/open.c */
|
||||
struct audit_names;
|
||||
struct filename {
|
||||
|
|
|
@ -11,6 +11,7 @@
|
|||
#define LOCKD_XDR_H
|
||||
|
||||
#include <linux/fs.h>
|
||||
#include <linux/filelock.h>
|
||||
#include <linux/nfs.h>
|
||||
#include <linux/sunrpc/xdr.h>
|
||||
|
||||
|
|
Loading…
Reference in a new issue