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fuse: increase readdir buffer size

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Increase the buffer size to the count requested by userspace.  This
improves performance.

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Bernd Schubert <bschubert@ddn.com>
This commit is contained in:
Miklos Szeredi 2025-04-08 15:14:20 +02:00 committed by Miklos Szeredi
parent 467e245d47
commit dabb903910
1 changed files with 14 additions and 19 deletions
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33
fs/fuse/readdir.c
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@ -335,35 +335,32 @@ static int fuse_readdir_uncached(struct file *file, struct dir_context *ctx)
{
int plus;
ssize_t res;
struct folio *folio;
struct inode *inode = file_inode(file);
struct fuse_mount *fm = get_fuse_mount(inode);
struct fuse_conn *fc = fm->fc;
struct fuse_io_args ia = {};
struct fuse_args_pages *ap = &ia.ap;
struct fuse_folio_desc desc = { .length = PAGE_SIZE };
struct fuse_args *args = &ia.ap.args;
void *buf;
size_t bufsize = clamp((unsigned int) ctx->count, PAGE_SIZE, fc->max_pages << PAGE_SHIFT);
u64 attr_version = 0, evict_ctr = 0;
bool locked;
folio = folio_alloc(GFP_KERNEL, 0);
if (!folio)
buf = kvmalloc(bufsize, GFP_KERNEL);
if (!buf)
return -ENOMEM;
args->out_args[0].value = buf;
plus = fuse_use_readdirplus(inode, ctx);
ap->args.out_pages = true;
ap->num_folios = 1;
ap->folios = &folio;
ap->descs = &desc;
if (plus) {
attr_version = fuse_get_attr_version(fm->fc);
evict_ctr = fuse_get_evict_ctr(fm->fc);
fuse_read_args_fill(&ia, file, ctx->pos, PAGE_SIZE,
FUSE_READDIRPLUS);
fuse_read_args_fill(&ia, file, ctx->pos, bufsize, FUSE_READDIRPLUS);
} else {
fuse_read_args_fill(&ia, file, ctx->pos, PAGE_SIZE,
FUSE_READDIR);
fuse_read_args_fill(&ia, file, ctx->pos, bufsize, FUSE_READDIR);
}
locked = fuse_lock_inode(inode);
res = fuse_simple_request(fm, &ap->args);
res = fuse_simple_request(fm, args);
fuse_unlock_inode(inode, locked);
if (res >= 0) {
if (!res) {
@ -372,16 +369,14 @@ static int fuse_readdir_uncached(struct file *file, struct dir_context *ctx)
if (ff->open_flags & FOPEN_CACHE_DIR)
fuse_readdir_cache_end(file, ctx->pos);
} else if (plus) {
res = parse_dirplusfile(folio_address(folio), res,
file, ctx, attr_version,
res = parse_dirplusfile(buf, res, file, ctx, attr_version,
evict_ctr);
} else {
res = parse_dirfile(folio_address(folio), res, file,
ctx);
res = parse_dirfile(buf, res, file, ctx);
}
}
folio_put(folio);
kvfree(buf);
fuse_invalidate_atime(inode);
return res;
}