spinlock_t tree_lock; /* and lock protecting it */
atomic_t i_mmap_writable;/* count VM_SHARED mappings */
struct rb_root i_mmap; /* tree of private and shared mappings */
- struct list_head i_mmap_nonlinear;/*list VM_NONLINEAR mappings */
struct rw_semaphore i_mmap_rwsem; /* protect tree, count, list */
/* Protected by tree_lock together with the radix tree */
unsigned long nrpages; /* number of total pages */
*/
static inline int mapping_mapped(struct address_space *mapping)
{
- return !RB_EMPTY_ROOT(&mapping->i_mmap) ||
- !list_empty(&mapping->i_mmap_nonlinear);
+ return !RB_EMPTY_ROOT(&mapping->i_mmap);
}
/*
atomic_t i_readcount; /* struct files open RO */
#endif
const struct file_operations *i_fop; /* former ->i_op->default_file_ops */
- struct file_lock *i_flock;
+ struct file_lock_context *i_flctx;
struct address_space i_data;
struct list_head i_devices;
union {
#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 */
/*
* Special return value from posix_lock_file() and vfs_lock_file() for
/* 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 *);
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 *);
+ int (*lm_change)(struct file_lock *, int, struct list_head *);
void (*lm_setup)(struct file_lock *, void **);
};
* FIXME: should we create a separate "struct lock_request" to help distinguish
* these two uses?
*
- * The i_flock list is ordered by:
+ * The varous i_flctx lists are ordered by:
*
- * 1) lock type -- FL_LEASEs first, then FL_FLOCK, and finally FL_POSIX
- * 2) lock owner
- * 3) lock range start
- * 4) lock range end
+ * 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_next; /* singly linked list for this inode */
+ struct list_head fl_list; /* link into file_lock_context */
struct hlist_node fl_link; /* node in global lists */
struct list_head fl_block; /* circular list of blocked processes */
fl_owner_t fl_owner;
} fl_u;
};
+struct file_lock_context {
+ spinlock_t flc_lock;
+ struct list_head flc_flock;
+ struct list_head flc_posix;
+ struct list_head flc_lease;
+ int flc_flock_cnt;
+ int flc_posix_cnt;
+ int flc_lease_cnt;
+};
+
/* The following constant reflects the upper bound of the file/locking space */
#ifndef OFFSET_MAX
#define INT_LIMIT(x) (~((x)1 << (sizeof(x)*8 - 1)))
extern int fcntl_getlease(struct file *filp);
/* fs/locks.c */
+void locks_free_lock_context(struct file_lock_context *ctx);
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 lease_get_mtime(struct inode *, struct timespec *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 *);
+extern int lease_modify(struct file_lock *, int, struct list_head *);
#else /* !CONFIG_FILE_LOCKING */
static inline int fcntl_getlk(struct file *file, unsigned int cmd,
struct flock __user *user)
return F_UNLCK;
}
+static inline void
+locks_free_lock_context(struct file_lock_context *ctx)
+{
+}
+
static inline void locks_init_lock(struct file_lock *fl)
{
return;
return -EINVAL;
}
-static inline int lease_modify(struct file_lock **before, int arg,
+static inline int lease_modify(struct file_lock *fl, int arg,
struct list_head *dispose)
{
return -EINVAL;
struct file *filp,
loff_t size)
{
- if (inode->i_flock && mandatory_lock(inode))
+ if (inode->i_flctx && mandatory_lock(inode))
return locks_mandatory_area(
FLOCK_VERIFY_WRITE, inode, filp,
size < inode->i_size ? size : inode->i_size,
{
/*
* Since this check is lockless, we must ensure that any refcounts
- * taken are done before checking inode->i_flock. Otherwise, we could
- * end up racing with tasks trying to set a new lease on this file.
+ * 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_flock)
+ if (inode->i_flctx && !list_empty_careful(&inode->i_flctx->flc_lease))
return __break_lease(inode, mode, FL_LEASE);
return 0;
}
{
/*
* Since this check is lockless, we must ensure that any refcounts
- * taken are done before checking inode->i_flock. Otherwise, we could
- * end up racing with tasks trying to set a new lease on this file.
+ * 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_flock)
+ if (inode->i_flctx && !list_empty_careful(&inode->i_flctx->flc_lease))
return __break_lease(inode, mode, FL_DELEG);
return 0;
}
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 locks_mandatory_locked(struct file *file)
{
return 0;
}
+static inline int break_layout(struct inode *inode, bool wait)
+{
+ return 0;
+}
+
#endif /* CONFIG_FILE_LOCKING */
/* fs/open.c */
extern int generic_file_mmap(struct file *, struct vm_area_struct *);
extern int generic_file_readonly_mmap(struct file *, struct vm_area_struct *);
-extern int generic_file_remap_pages(struct vm_area_struct *, unsigned long addr,
- unsigned long size, pgoff_t pgoff);
int generic_write_checks(struct file *file, loff_t *pos, size_t *count, int isblk);
extern ssize_t generic_file_read_iter(struct kiocb *, struct iov_iter *);
extern ssize_t __generic_file_write_iter(struct kiocb *, struct iov_iter *);
projects / linux-drm-fsl-dcu.git / blobdiff