linux.git/fs/fuse/dir.c, branch v3.15

fuse: add renameat2 support

2014-04-28T14:43:44+00:00

Support RENAME_EXCHANGE and RENAME_NOREPLACE flags on the userspace ABI.

Signed-off-by: Miklos Szeredi

fuse: clear FUSE_I_CTIME_DIRTY flag on setattr

2014-04-28T12:19:25+00:00

The patch addresses two use-cases when the flag may be safely cleared:

1. fuse_do_setattr() is called with ATTR_CTIME flag set in attr->ia_valid.
In this case attr->ia_ctime bears actual value. In-kernel fuse must send it
to the userspace server and then assign the value to inode->i_ctime.

2. fuse_do_setattr() is called with ATTR_SIZE flag set in attr->ia_valid,
whereas ATTR_CTIME is not set (truncate(2)).
In this case in-kernel fuse must sent "now" to the userspace server and then
assign the value to inode->i_ctime.

In both cases we could clear I_DIRTY_SYNC, but that needs more thought.

Signed-off-by: Maxim Patlasov 
Signed-off-by: Miklos Szeredi

fuse: trust kernel i_ctime only

2014-04-28T12:19:24+00:00

Let the kernel maintain i_ctime locally: update i_ctime explicitly on
truncate, fallocate, open(O_TRUNC), setxattr, removexattr, link, rename,
unlink.

The inode flag I_DIRTY_SYNC serves as indication that local i_ctime should
be flushed to the server eventually.  The patch sets the flag and updates
i_ctime in course of operations listed above.

Signed-off-by: Maxim Patlasov 
Signed-off-by: Miklos Szeredi

fuse: remove .update_time

2014-04-28T12:19:24+00:00

This implements updating ctime as well as mtime on file_update_time().

Signed-off-by: Miklos Szeredi

fuse: allow ctime flushing to userspace

2014-04-28T12:19:24+00:00

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 
Signed-off-by: Miklos Szeredi

fuse: add .write_inode

2014-04-28T12:19:23+00:00

...and flush mtime from this.  This allows us to use the kernel
infrastructure for writing out dirty metadata (mtime at this point, but
ctime in the next patches and also maybe atime).

Signed-off-by: Miklos Szeredi

fuse: update mtime on truncate(2)

2014-04-28T12:19:22+00:00

Handling truncate(2), VFS doesn't set ATTR_MTIME bit in iattr structure;
only ATTR_SIZE bit is set. In-kernel fuse must handle the case by setting
mtime fields of struct fuse_setattr_in to "now" and set FATTR_MTIME bit
even though ATTR_MTIME was not set.

Signed-off-by: Maxim Patlasov 
Signed-off-by: Miklos Szeredi

fuse: Trust kernel i_mtime only

2014-04-02T13:38:48+00:00

Let the kernel maintain i_mtime locally:
 - clear S_NOCMTIME
 - implement i_op->update_time()
 - flush mtime on fsync and last close
 - update i_mtime explicitly on truncate and fallocate

Fuse inode flag FUSE_I_MTIME_DIRTY serves as indication that local i_mtime
should be flushed to the server eventually.

Signed-off-by: Maxim Patlasov 
Signed-off-by: Miklos Szeredi

fuse: Trust kernel i_size only

2014-04-02T13:38:48+00:00

Make fuse think that when writeback is on the inode's i_size is always
up-to-date and not update it with the value received from the userspace.
This is done because the page cache code may update i_size without letting
the FS know.

This assumption implies fixing the previously introduced short-read helper --
when a short read occurs the 'hole' is filled with zeroes.

fuse_file_fallocate() is also fixed because now we should keep i_size up to
date, so it must be updated if FUSE_FALLOCATE request succeeded.

Signed-off-by: Maxim V. Patlasov 
Signed-off-by: Miklos Szeredi

fuse: don't invalidate attrs when not using atime

2014-01-22T18:36:58+00:00

Various read operations (e.g. readlink, readdir) invalidate the cached
attrs for atime changes.  This patch adds a new function
'fuse_invalidate_atime', which checks for a read-only super block and
avoids the attr invalidation in that case.

Signed-off-by: Andrew Gallagher 
Signed-off-by: Miklos Szeredi