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authorMaxim Patlasov <mpatlasov@parallels.com>2012-12-18 14:05:08 +0400
committerMiklos Szeredi <mszeredi@suse.cz>2013-04-18 10:55:24 +0200
commitefb9fa9e911b23c7ea5330215bda778a7c69dba8 (patch)
tree7af69df4b3f3c5b89dc0e245a974fec358f23028 /fs/fuse/file.c
parent439ee5f0c5080d4fd15fda0c5bbee1fb3a57894e (diff)
fuse: truncate file if async dio failed
The patch improves error handling in fuse_direct_IO(): if we successfully submitted several fuse requests on behalf of synchronous direct write extending file and some of them failed, let's try to do our best to clean-up. Changed in v2: reuse fuse_do_setattr(). Thanks to Brian for suggestion. Signed-off-by: Maxim Patlasov <mpatlasov@parallels.com> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Diffstat (limited to 'fs/fuse/file.c')
-rw-r--r--fs/fuse/file.c22
1 files changed, 20 insertions, 2 deletions
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 8f39f7b8cef2..1f8e3d60dc07 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -2352,6 +2352,20 @@ int fuse_notify_poll_wakeup(struct fuse_conn *fc,
return 0;
}
+static void fuse_do_truncate(struct file *file)
+{
+ struct inode *inode = file->f_mapping->host;
+ struct iattr attr;
+
+ attr.ia_valid = ATTR_SIZE;
+ attr.ia_size = i_size_read(inode);
+
+ attr.ia_file = file;
+ attr.ia_valid |= ATTR_FILE;
+
+ fuse_do_setattr(inode, &attr, file);
+}
+
static ssize_t
fuse_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
loff_t offset, unsigned long nr_segs)
@@ -2419,8 +2433,12 @@ fuse_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
kfree(io);
}
- if (rw == WRITE && ret > 0)
- fuse_write_update_size(inode, pos);
+ if (rw == WRITE) {
+ if (ret > 0)
+ fuse_write_update_size(inode, pos);
+ else if (ret < 0 && offset + count > i_size)
+ fuse_do_truncate(file);
+ }
return ret;
}