diff options
42 files changed, 481 insertions, 429 deletions
diff --git a/arch/arm/kernel/sys_oabi-compat.c b/arch/arm/kernel/sys_oabi-compat.c index 68112c172025..006163195d67 100644 --- a/arch/arm/kernel/sys_oabi-compat.c +++ b/arch/arm/kernel/sys_oabi-compat.c @@ -73,6 +73,7 @@ #include <linux/syscalls.h> #include <linux/errno.h> #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/cred.h> #include <linux/fcntl.h> #include <linux/eventpoll.h> diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c index b740017634ef..b6ba22975781 100644 --- a/fs/9p/vfs_file.c +++ b/fs/9p/vfs_file.c @@ -9,6 +9,7 @@ #include <linux/module.h> #include <linux/errno.h> #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/sched.h> #include <linux/file.h> #include <linux/stat.h> diff --git a/fs/afs/internal.h b/fs/afs/internal.h index fd8567b98e2b..2d6d7dae225a 100644 --- a/fs/afs/internal.h +++ b/fs/afs/internal.h @@ -9,6 +9,7 @@ #include <linux/kernel.h> #include <linux/ktime.h> #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/pagemap.h> #include <linux/rxrpc.h> #include <linux/key.h> diff --git a/fs/attr.c b/fs/attr.c index b45f30e516fa..f3eb8e57b451 100644 --- a/fs/attr.c +++ b/fs/attr.c @@ -14,6 +14,7 @@ #include <linux/capability.h> #include <linux/fsnotify.h> #include <linux/fcntl.h> +#include <linux/filelock.h> #include <linux/security.h> #include <linux/evm.h> #include <linux/ima.h> diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index f75ad432f375..2ce6cc443b48 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -9,6 +9,7 @@ #include <linux/wait.h> #include <linux/writeback.h> #include <linux/iversion.h> +#include <linux/filelock.h> #include "super.h" #include "mds_client.h" diff --git a/fs/ceph/locks.c b/fs/ceph/locks.c index 9c8dc8a55e7e..cb51c7e9c8e2 100644 --- a/fs/ceph/locks.c +++ b/fs/ceph/locks.c @@ -7,6 +7,7 @@ #include "super.h" #include "mds_client.h" +#include <linux/filelock.h> #include <linux/ceph/pagelist.h> static u64 lock_secret; diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 10e00c624922..f052f190b2e8 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -12,6 +12,7 @@ #include <linux/module.h> #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/mount.h> #include <linux/slab.h> #include <linux/init.h> diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index cfdd5bf701a1..cd8171a1c9a0 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -26,6 +26,7 @@ #include <uapi/linux/cifs/cifs_mount.h> #include "../smbfs_common/smb2pdu.h" #include "smb2pdu.h" +#include <linux/filelock.h> #define SMB_PATH_MAX 260 #define CIFS_PORT 445 diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 23f10e0d6e7e..60dd4e37030a 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -15,6 +15,7 @@ /* want to reuse a stale file handle and only the caller knows the file info */ #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/kernel.h> #include <linux/vfs.h> #include <linux/slab.h> diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 22dfc1f8b4f1..1d9cc59d8259 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -9,6 +9,7 @@ * */ #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/backing-dev.h> #include <linux/stat.h> #include <linux/fcntl.h> diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c index ba6cc50af390..9f1dd04b555a 100644 --- a/fs/cifs/smb2file.c +++ b/fs/cifs/smb2file.c @@ -7,6 +7,7 @@ * */ #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/stat.h> #include <linux/slab.h> #include <linux/pagemap.h> diff --git a/fs/dlm/plock.c b/fs/dlm/plock.c index 737f185aad8d..ed4357e62f35 100644 --- a/fs/dlm/plock.c +++ b/fs/dlm/plock.c @@ -4,6 +4,7 @@ */ #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/miscdevice.h> #include <linux/poll.h> #include <linux/dlm.h> diff --git a/fs/fcntl.c b/fs/fcntl.c index 146c9ab0cd4b..7852e946fdf4 100644 --- a/fs/fcntl.c +++ b/fs/fcntl.c @@ -10,6 +10,7 @@ #include <linux/mm.h> #include <linux/sched/task.h> #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/file.h> #include <linux/fdtable.h> #include <linux/capability.h> diff --git a/fs/file_table.c b/fs/file_table.c index dd88701e54a9..372653b92617 100644 --- a/fs/file_table.c +++ b/fs/file_table.c @@ -13,6 +13,7 @@ #include <linux/init.h> #include <linux/module.h> #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/security.h> #include <linux/cred.h> #include <linux/eventpoll.h> diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 875314ee6f59..1458412f2492 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -18,6 +18,7 @@ #include <linux/falloc.h> #include <linux/uio.h> #include <linux/fs.h> +#include <linux/filelock.h> static int fuse_send_open(struct fuse_mount *fm, u64 nodeid, unsigned int open_flags, int opcode, diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index eea5be4fbf0e..e8e20a716004 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -15,6 +15,7 @@ #include <linux/mm.h> #include <linux/mount.h> #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/gfs2_ondisk.h> #include <linux/falloc.h> #include <linux/swap.h> diff --git a/fs/inode.c b/fs/inode.c index f453eb58fd03..d02dd8f1e967 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -5,6 +5,7 @@ */ #include <linux/export.h> #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/mm.h> #include <linux/backing-dev.h> #include <linux/hash.h> diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index 14d7f3599c63..000a6648f122 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -12,6 +12,7 @@ #include <linux/ethtool.h> #include <linux/falloc.h> #include <linux/mount.h> +#include <linux/filelock.h> #include "glob.h" #include "smbfsctl.h" diff --git a/fs/ksmbd/vfs.c b/fs/ksmbd/vfs.c index ff0e7a4fcd4d..5851934dc85b 100644 --- a/fs/ksmbd/vfs.c +++ b/fs/ksmbd/vfs.c @@ -6,6 +6,7 @@ #include <linux/kernel.h> #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/uaccess.h> #include <linux/backing-dev.h> #include <linux/writeback.h> diff --git a/fs/ksmbd/vfs_cache.c b/fs/ksmbd/vfs_cache.c index da9163b00350..552c3882a8f4 100644 --- a/fs/ksmbd/vfs_cache.c +++ b/fs/ksmbd/vfs_cache.c @@ -5,6 +5,7 @@ */ #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/slab.h> #include <linux/vmalloc.h> diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c index 99fffc9cb958..e875a3571c41 100644 --- a/fs/lockd/clntproc.c +++ b/fs/lockd/clntproc.c @@ -12,6 +12,7 @@ #include <linux/types.h> #include <linux/errno.h> #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/nfs_fs.h> #include <linux/utsname.h> #include <linux/freezer.h> diff --git a/fs/lockd/netns.h b/fs/lockd/netns.h index 5bec78c8e431..17432c445fe6 100644 --- a/fs/lockd/netns.h +++ b/fs/lockd/netns.h @@ -3,6 +3,7 @@ #define __LOCKD_NETNS_H__ #include <linux/fs.h> +#include <linux/filelock.h> #include <net/netns/generic.h> struct lockd_net { diff --git a/fs/locks.c b/fs/locks.c index 8f01bee17715..a5cc90c958c9 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -52,6 +52,7 @@ #include <linux/capability.h> #include <linux/file.h> #include <linux/fdtable.h> +#include <linux/filelock.h> #include <linux/fs.h> #include <linux/init.h> #include <linux/security.h> diff --git a/fs/namei.c b/fs/namei.c index 309ae6fc8c99..60a9d3ac941f 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -20,6 +20,7 @@ #include <linux/kernel.h> #include <linux/slab.h> #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/namei.h> #include <linux/pagemap.h> #include <linux/sched/mm.h> diff --git a/fs/nfs/file.c b/fs/nfs/file.c index d8ec889a4b3f..b0f3c9339e70 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -31,6 +31,7 @@ #include <linux/swap.h> #include <linux/uaccess.h> +#include <linux/filelock.h> #include "delegation.h" #include "internal.h" diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index 5edd1704f735..4c9f8bd866ab 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -23,6 +23,7 @@ #define NFS4_MAX_LOOP_ON_RECOVER (10) #include <linux/seqlock.h> +#include <linux/filelock.h> struct idmap; diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index 16be6dae524f..779bfc37233c 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -21,6 +21,7 @@ #include <linux/nfs_page.h> #include <linux/nfs_mount.h> #include <linux/export.h> +#include <linux/filelock.h> #include "internal.h" #include "pnfs.h" diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 80c240e50952..1a80d548253a 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -25,6 +25,7 @@ #include <linux/freezer.h> #include <linux/wait.h> #include <linux/iversion.h> +#include <linux/filelock.h> #include <linux/uaccess.h> #include <linux/sched/mm.h> diff --git a/fs/nfs_common/grace.c b/fs/nfs_common/grace.c index 0a9b72685f98..1479583fbb62 100644 --- a/fs/nfs_common/grace.c +++ b/fs/nfs_common/grace.c @@ -9,6 +9,7 @@ #include <net/net_namespace.h> #include <net/netns/generic.h> #include <linux/fs.h> +#include <linux/filelock.h> static unsigned int grace_net_id; static DEFINE_SPINLOCK(grace_lock); diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h index 8c854ba3285b..bc139401927d 100644 --- a/fs/nfsd/netns.h +++ b/fs/nfsd/netns.h @@ -10,6 +10,7 @@ #include <net/net_namespace.h> #include <net/netns/generic.h> +#include <linux/filelock.h> #include <linux/percpu_counter.h> #include <linux/siphash.h> diff --git a/fs/ocfs2/locks.c b/fs/ocfs2/locks.c index 73a3854b2afb..f37174e79fad 100644 --- a/fs/ocfs2/locks.c +++ b/fs/ocfs2/locks.c @@ -8,6 +8,7 @@ */ #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/fcntl.h> #include <cluster/masklog.h> diff --git a/fs/ocfs2/stack_user.c b/fs/ocfs2/stack_user.c index 64e6ddcfe329..05d4414d0c33 100644 --- a/fs/ocfs2/stack_user.c +++ b/fs/ocfs2/stack_user.c @@ -9,6 +9,7 @@ #include <linux/module.h> #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/miscdevice.h> #include <linux/mutex.h> #include <linux/slab.h> diff --git a/fs/open.c b/fs/open.c index 82c1a28b3308..9b1c08298a07 100644 --- a/fs/open.c +++ b/fs/open.c @@ -33,6 +33,7 @@ #include <linux/dnotify.h> #include <linux/compat.h> #include <linux/mnt_idmapping.h> +#include <linux/filelock.h> #include "internal.h" diff --git a/fs/orangefs/file.c b/fs/orangefs/file.c index 167fa43b24f9..4ecb91a9bbeb 100644 --- a/fs/orangefs/file.c +++ b/fs/orangefs/file.c @@ -14,6 +14,7 @@ #include "orangefs-kernel.h" #include "orangefs-bufmap.h" #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/pagemap.h> static int flush_racache(struct inode *inode) diff --git a/fs/posix_acl.c b/fs/posix_acl.c index d7bc81fc0840..d2271431f344 100644 --- a/fs/posix_acl.c +++ b/fs/posix_acl.c @@ -28,6 +28,7 @@ #include <linux/security.h> #include <linux/evm.h> #include <linux/fsnotify.h> +#include <linux/filelock.h> #include "internal.h" diff --git a/fs/proc/fd.c b/fs/proc/fd.c index fc46d6fe080c..53e4919ef860 100644 --- a/fs/proc/fd.c +++ b/fs/proc/fd.c @@ -12,6 +12,7 @@ #include <linux/file.h> #include <linux/seq_file.h> #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/proc_fs.h> diff --git a/fs/utimes.c b/fs/utimes.c index 39f356017635..00499e4ba955 100644 --- a/fs/utimes.c +++ b/fs/utimes.c @@ -7,6 +7,7 @@ #include <linux/uaccess.h> #include <linux/compat.h> #include <asm/unistd.h> +#include <linux/filelock.h> static bool nsec_valid(long nsec) { diff --git a/fs/xattr.c b/fs/xattr.c index adab9a70b536..3fead374901b 100644 --- a/fs/xattr.c +++ b/fs/xattr.c @@ -9,6 +9,7 @@ Copyright (c) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> */ #include <linux/fs.h> +#include <linux/filelock.h> #include <linux/slab.h> #include <linux/file.h> #include <linux/xattr.h> diff --git a/fs/xfs/xfs_linux.h b/fs/xfs/xfs_linux.h index f9878021e7d0..e88f18f85e4b 100644 --- a/fs/xfs/xfs_linux.h +++ b/fs/xfs/xfs_linux.h @@ -34,6 +34,7 @@ typedef __u32 xfs_nlink_t; #include <linux/module.h> #include <linux/mutex.h> #include <linux/file.h> +#include <linux/filelock.h> #include <linux/swap.h> #include <linux/errno.h> #include <linux/sched/signal.h> diff --git a/include/linux/filelock.h b/include/linux/filelock.h new file mode 100644 index 000000000000..dc5056a66e2c --- /dev/null +++ b/include/linux/filelock.h @@ -0,0 +1,441 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_FILELOCK_H +#define _LINUX_FILELOCK_H + +#include <linux/fs.h> + +#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 + +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 *); + +/* + * struct file_lock has a union that some filesystems use to track + * their own private info. The NFS side of things is defined here: + */ +#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; +}; + +#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) |