From 18e79b40ed9c5223b88771f805c69f5993fc131b Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Fri, 24 Mar 2006 03:18:14 -0800 Subject: [PATCH] [PATCH] fsync: extract internal code Pull the guts out of do_fsync() - we can use it elsewhere. Cc: Hugh Dickins Cc: Nick Piggin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/buffer.c | 43 +++++++++++++++++++++++-------------------- include/linux/fs.h | 1 + 2 files changed, 24 insertions(+), 20 deletions(-) diff --git a/fs/buffer.c b/fs/buffer.c index 24262ea8cc..6d77ce9f54 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -327,31 +327,24 @@ int file_fsync(struct file *filp, struct dentry *dentry, int datasync) return ret; } -static long do_fsync(unsigned int fd, int datasync) +long do_fsync(struct file *file, int datasync) { - struct file * file; - struct address_space *mapping; - int ret, err; - - ret = -EBADF; - file = fget(fd); - if (!file) - goto out; + int ret; + int err; + struct address_space *mapping = file->f_mapping; - ret = -EINVAL; if (!file->f_op || !file->f_op->fsync) { /* Why? We can still call filemap_fdatawrite */ - goto out_putf; + ret = -EINVAL; + goto out; } - mapping = file->f_mapping; - current->flags |= PF_SYNCWRITE; ret = filemap_fdatawrite(mapping); /* - * We need to protect against concurrent writers, - * which could cause livelocks in fsync_buffers_list + * We need to protect against concurrent writers, which could cause + * livelocks in fsync_buffers_list(). */ mutex_lock(&mapping->host->i_mutex); err = file->f_op->fsync(file, file->f_dentry, datasync); @@ -362,21 +355,31 @@ static long do_fsync(unsigned int fd, int datasync) if (!ret) ret = err; current->flags &= ~PF_SYNCWRITE; - -out_putf: - fput(file); out: return ret; } +static long __do_fsync(unsigned int fd, int datasync) +{ + struct file *file; + int ret = -EBADF; + + file = fget(fd); + if (file) { + ret = do_fsync(file, datasync); + fput(file); + } + return ret; +} + asmlinkage long sys_fsync(unsigned int fd) { - return do_fsync(fd, 0); + return __do_fsync(fd, 0); } asmlinkage long sys_fdatasync(unsigned int fd) { - return do_fsync(fd, 1); + return __do_fsync(fd, 1); } /* diff --git a/include/linux/fs.h b/include/linux/fs.h index 092cfaee0c..215696a0f1 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1478,6 +1478,7 @@ extern int wait_on_page_writeback_range(struct address_space *mapping, extern int __filemap_fdatawrite_range(struct address_space *mapping, loff_t start, loff_t end, int sync_mode); +extern long do_fsync(struct file *file, int datasync); extern void sync_supers(void); extern void sync_filesystems(int wait); extern void emergency_sync(void); -- 2.39.5