fuse: allow ctime flushing to userspace

The patch extends fuse_setattr_in, and extends the flush procedure
(fuse_flush_times()) called on ->write_inode() to send the ctime as well as
mtime.

Signed-off-by: Maxim Patlasov <MPatlasov@parallels.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 8c23383..e6ba579 100644 (file)
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1597,7 +1597,7 @@ static void fuse_setattr_fill(struct fuse_conn *fc, struct fuse_req *req,
 /*
  * Flush inode->i_mtime to the server
  */
-int fuse_flush_mtime(struct inode *inode, struct fuse_file *ff)
+int fuse_flush_times(struct inode *inode, struct fuse_file *ff)
 {
        struct fuse_conn *fc = get_fuse_conn(inode);
        struct fuse_req *req;
@@ -1612,9 +1612,14 @@ int fuse_flush_mtime(struct inode *inode, struct fuse_file *ff)
        memset(&inarg, 0, sizeof(inarg));
        memset(&outarg, 0, sizeof(outarg));
 
-       inarg.valid |= FATTR_MTIME;
+       inarg.valid = FATTR_MTIME;
        inarg.mtime = inode->i_mtime.tv_sec;
        inarg.mtimensec = inode->i_mtime.tv_nsec;
+       if (fc->minor >= 23) {
+               inarg.valid |= FATTR_CTIME;
+               inarg.ctime = inode->i_ctime.tv_sec;
+               inarg.ctimensec = inode->i_ctime.tv_nsec;
+       }
        if (ff) {
                inarg.valid |= FATTR_FH;
                inarg.fh = ff->fh;

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index d228c39..96d513e 100644 (file)
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1691,7 +1691,7 @@ int fuse_write_inode(struct inode *inode, struct writeback_control *wbc)
        int err;
 
        ff = __fuse_write_file_get(fc, fi);
-       err = fuse_flush_mtime(inode, ff);
+       err = fuse_flush_times(inode, ff);
        if (ff)
                fuse_file_put(ff, 0);
 

diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index d2f1005..40677e3 100644 (file)
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -889,7 +889,7 @@ int fuse_dev_release(struct inode *inode, struct file *file);
 
 bool fuse_write_update_size(struct inode *inode, loff_t pos);
 
-int fuse_flush_mtime(struct inode *inode, struct fuse_file *ff);
+int fuse_flush_times(struct inode *inode, struct fuse_file *ff);
 int fuse_write_inode(struct inode *inode, struct writeback_control *wbc);
 
 int fuse_do_setattr(struct inode *inode, struct iattr *attr,

diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h
index d1b4e2c..e86a21a 100644 (file)
--- a/include/uapi/linux/fuse.h
+++ b/include/uapi/linux/fuse.h
@@ -98,6 +98,8 @@
  *  - add FUSE_WRITEBACK_CACHE
  *  - add time_gran to fuse_init_out
  *  - add reserved space to fuse_init_out
+ *  - add FATTR_CTIME
+ *  - add ctime and ctimensec to fuse_setattr_in
  */
 
 #ifndef _LINUX_FUSE_H
@@ -193,6 +195,7 @@ struct fuse_file_lock {
 #define FATTR_ATIME_NOW        (1 << 7)
 #define FATTR_MTIME_NOW        (1 << 8)
 #define FATTR_LOCKOWNER        (1 << 9)
+#define FATTR_CTIME    (1 << 10)
 
 /**
  * Flags returned by the OPEN request
@@ -440,10 +443,10 @@ struct fuse_setattr_in {
        uint64_t        lock_owner;
        uint64_t        atime;
        uint64_t        mtime;
-       uint64_t        unused2;
+       uint64_t        ctime;
        uint32_t        atimensec;
        uint32_t        mtimensec;
-       uint32_t        unused3;
+       uint32_t        ctimensec;
        uint32_t        mode;
        uint32_t        unused4;
        uint32_t        uid;