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fuse: only refresh size on cached write when opened with O_APPEND #193

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Merged
hbirth merged 1 commit into from
Jul 29, 2026
Merged

fuse: only refresh size on cached write when opened with O_APPEND #193

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9 changes: 6 additions & 3 deletions fs/fuse/file.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1833,9 +1833,12 @@ static ssize_t fuse_cache_write_iter(struct kiocb *iocb, struct iov_iter *from)
return fuse_direct_write_iter(iocb, from);

if (fc->writeback_cache) {
/* Update size (EOF optimization) and mode (SUID clearing) */
err = fuse_update_attributes(mapping->host, file,
STATX_SIZE | STATX_MODE);
/* Update mode for SUID clearing, and also update size if the file
* is opened with O_APPEND mode.
*/
u32 request_mask = (file->f_flags & O_APPEND) ?
(STATX_SIZE | STATX_MODE) : STATX_MODE;
err = fuse_update_attributes(mapping->host, file, request_mask);
if (err)
return err;

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