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orangefs: implement statx

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Fortunately OrangeFS has had a getattr request mask for a long time.

The server basically has two difficulty levels for attributes.  Fetching
any attribute except size requires communicating with the metadata
server for that handle.  Since all the attributes are right there, it
makes sense to return them all.  Fetching the size requires
communicating with every I/O server (that the file is distributed
across).  Therefore if asked for anything except size, get everything
except size, and if asked for size, get everything.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
This commit is contained in:
Martin Brandenburg
2017-04-25 15:38:03 -04:00
committed by Mike Marshall
parent 7b796ae370
commit 68a24a6cc4
5 changed files with 64 additions and 28 deletions
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6
fs/orangefs/file.c
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@@ -475,7 +475,8 @@ static ssize_t orangefs_file_write_iter(struct kiocb *iocb, struct iov_iter *ite
/* Make sure generic_write_checks sees an up to date inode size. */
if (file->f_flags & O_APPEND) {
rc = orangefs_inode_getattr(file->f_mapping->host, 0, 1);
rc = orangefs_inode_getattr(file->f_mapping->host, 0, 1,
STATX_SIZE);
if (rc == -ESTALE)
rc = -EIO;
if (rc) {
@@ -693,7 +694,8 @@ static loff_t orangefs_file_llseek(struct file *file, loff_t offset, int origin)
* NOTE: We are only interested in file size here,
* so we set mask accordingly.
*/
ret = orangefs_inode_getattr(file->f_mapping->host, 0, 1);
ret = orangefs_inode_getattr(file->f_mapping->host, 0, 1,
STATX_SIZE);
if (ret == -ESTALE)
ret = -EIO;
if (ret) {