kernel.git/fs/orangefs/dir.c, branch linux-4.13.y

orangefs: count directory pieces correctly

2017-05-04T18:38:24Z

A large directory full of differently sized file names triggered this. Most directories, even very large directories with shorter names, would be lucky enough to fit in one server response. Signed-off-by: Martin Brandenburg Signed-off-by: Mike Marshall

orangefs: invalidate stored directory on seek

2017-05-04T18:38:15Z

If an application seeks to a position before the point which has been read, it must want updates which have been made to the directory. So delete the copy stored in the kernel so it will be fetched again. Signed-off-by: Martin Brandenburg Signed-off-by: Mike Marshall

orangefs: skip forward to the next directory entry if seek is short

2017-05-04T18:38:10Z

If userspace seeks to a position in the stream which is not correct, it would have returned EIO because the data in the buffer at that offset would be incorrect. This and the userspace daemon returning a corrupt directory are indistinguishable. Now if the data does not look right, skip forward to the next chunk and try again. The motivation is that if the directory changes, an application may seek to a position that was valid and no longer is valid. It is not yet possible for a directory to change. Signed-off-by: Martin Brandenburg Signed-off-by: Mike Marshall

orangefs: remove ORANGEFS_READDIR macros

2017-04-26T18:33:00Z

They are clones of the ORANGEFS_ITERATE macros in use elsewhere. Delete ORANGEFS_ITERATE_NEXT which is a hack previously used by readdir. Signed-off-by: Martin Brandenburg Signed-off-by: Mike Marshall

orangefs: support very large directories

2017-04-26T18:33:00Z

This works by maintaining a linked list of pages which the directory has been read into rather than one giant fixed-size buffer. This replaces code which limits the total directory size to the total amount that could be returned in one server request. Since filenames are usually considerably shorter than the maximum, the old code could usually handle several server requests before running out of space. Signed-off-by: Martin Brandenburg Signed-off-by: Mike Marshall

orangefs: support llseek on directories

2017-04-26T18:33:00Z

This and the previous commit fix xfstests generic/257. Signed-off-by: Martin Brandenburg Signed-off-by: Mike Marshall

orangefs: rewrite readdir to fix several bugs

2017-04-26T18:33:00Z

In the past, readdir assumed that the user buffer will be large enough that all entries from the server will fit. If this was not true, entries would be skipped. Since it works now, request 512 entries rather than 96 per server operation. Signed-off-by: Martin Brandenburg Signed-off-by: Mike Marshall

orangefs: use %pd/%pD

2016-08-08T03:38:47Z

Signed-off-by: Al Viro

orangefs: remove unused variable

2016-04-08T19:50:44Z

Signed-off-by: Martin Brandenburg Signed-off-by: Mike Marshall

orangefs: don't put readdir slot twice

2016-03-31T16:06:00Z

This was quite an oversight. After a readdir, the module could not be unloaded, the number of slots is wrong, and memory near the slot bitmap is possibly corrupt. Oops. Signed-off-by: Martin Brandenburg