diff options
| -rw-r--r-- | fs/locks.c | 80 | ||||
| -rw-r--r-- | include/linux/fs.h | 14 |
2 files changed, 0 insertions, 94 deletions
@@ -2597,86 +2597,6 @@ static int __init proc_locks_init(void) module_init(proc_locks_init); #endif -/** - * lock_may_read - checks that the region is free of locks - * @inode: the inode that is being read - * @start: the first byte to read - * @len: the number of bytes to read - * - * Emulates Windows locking requirements. Whole-file - * mandatory locks (share modes) can prohibit a read and - * byte-range POSIX locks can prohibit a read if they overlap. - * - * N.B. this function is only ever called - * from knfsd and ownership of locks is never checked. - */ -int lock_may_read(struct inode *inode, loff_t start, unsigned long len) -{ - struct file_lock *fl; - int result = 1; - - spin_lock(&inode->i_lock); - for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { - if (IS_POSIX(fl)) { - if (fl->fl_type == F_RDLCK) - continue; - if ((fl->fl_end < start) || (fl->fl_start > (start + len))) - continue; - } else if (IS_FLOCK(fl)) { - if (!(fl->fl_type & LOCK_MAND)) - continue; - if (fl->fl_type & LOCK_READ) - continue; - } else - continue; - result = 0; - break; - } - spin_unlock(&inode->i_lock); - return result; -} - -EXPORT_SYMBOL(lock_may_read); - -/** - * lock_may_write - checks that the region is free of locks - * @inode: the inode that is being written - * @start: the first byte to write - * @len: the number of bytes to write - * - * Emulates Windows locking requirements. Whole-file - * mandatory locks (share modes) can prohibit a write and - * byte-range POSIX locks can prohibit a write if they overlap. - * - * N.B. this function is only ever called - * from knfsd and ownership of locks is never checked. - */ -int lock_may_write(struct inode *inode, loff_t start, unsigned long len) -{ - struct file_lock *fl; - int result = 1; - - spin_lock(&inode->i_lock); - for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { - if (IS_POSIX(fl)) { - if ((fl->fl_end < start) || (fl->fl_start > (start + len))) - continue; - } else if (IS_FLOCK(fl)) { - if (!(fl->fl_type & LOCK_MAND)) - continue; - if (fl->fl_type & LOCK_WRITE) - continue; - } else - continue; - result = 0; - break; - } - spin_unlock(&inode->i_lock); - return result; -} - -EXPORT_SYMBOL(lock_may_write); - static int __init filelock_init(void) { int i; diff --git a/include/linux/fs.h b/include/linux/fs.h index 3b07ce2..458f733 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -985,8 +985,6 @@ extern void lease_get_mtime(struct inode *, struct timespec *time); extern int generic_setlease(struct file *, long, struct file_lock **); extern int vfs_setlease(struct file *, long, struct file_lock **); extern int lease_modify(struct file_lock **, int); -extern int lock_may_read(struct inode *, loff_t start, unsigned long count); -extern int lock_may_write(struct inode *, loff_t start, unsigned long count); #else /* !CONFIG_FILE_LOCKING */ static inline int fcntl_getlk(struct file *file, unsigned int cmd, struct flock __user *user) @@ -1117,18 +1115,6 @@ static inline int lease_modify(struct file_lock **before, int arg) { return -EINVAL; } - -static inline int lock_may_read(struct inode *inode, loff_t start, - unsigned long len) -{ - return 1; -} - -static inline int lock_may_write(struct inode *inode, loff_t start, - unsigned long len) -{ - return 1; -} #endif /* !CONFIG_FILE_LOCKING */ |
