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afs: Flush outstanding writes when an fd is closed

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Flush outstanding writes in afs when an fd is closed.  This is what NFS and
CIFS do.

Reported-by: Marc Dionne <marc.c.dionne@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells 2017-03-16 16:27:45 +00:00
parent e8e581a88c
commit 58fed94dfb
3 changed files with 16 additions and 0 deletions
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1
fs/afs/file.c
View File

@ -30,6 +30,7 @@ static int afs_readpages(struct file *filp, struct address_space *mapping,
const struct file_operations afs_file_operations = { const struct file_operations afs_file_operations = {
.open = afs_open, .open = afs_open,
.flush = afs_flush,
.release = afs_release, .release = afs_release,
.llseek = generic_file_llseek, .llseek = generic_file_llseek,
.read_iter = generic_file_read_iter, .read_iter = generic_file_read_iter,

1
fs/afs/internal.h
View File

@ -720,6 +720,7 @@ extern int afs_writepages(struct address_space *, struct writeback_control *);
extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *); extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *);
extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *);
extern int afs_writeback_all(struct afs_vnode *); extern int afs_writeback_all(struct afs_vnode *);
extern int afs_flush(struct file *, fl_owner_t);
extern int afs_fsync(struct file *, loff_t, loff_t, int); extern int afs_fsync(struct file *, loff_t, loff_t, int);

14
fs/afs/write.c
View File

@ -757,6 +757,20 @@ out:
return ret; return ret;
} }
/*
* Flush out all outstanding writes on a file opened for writing when it is
* closed.
*/
int afs_flush(struct file *file, fl_owner_t id)
{
_enter("");
if ((file->f_mode & FMODE_WRITE) == 0)
return 0;
return vfs_fsync(file, 0);
}
/* /*
* notification that a previously read-only page is about to become writable * notification that a previously read-only page is about to become writable
* - if it returns an error, the caller will deliver a bus error signal * - if it returns an error, the caller will deliver a bus error signal