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[PATCH v2 2/3] block/export/fuse: Extract fuse_fallocate_zero_range()
From: |
Philippe Mathieu-Daudé |
Subject: |
[PATCH v2 2/3] block/export/fuse: Extract fuse_fallocate_zero_range() |
Date: |
Mon, 24 Jan 2022 23:03:56 +0100 |
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
block/export/fuse.c | 48 +++++++++++++++++++++++++++++----------------
1 file changed, 31 insertions(+), 17 deletions(-)
diff --git a/block/export/fuse.c b/block/export/fuse.c
index 31cb0503adc..3a158342c75 100644
--- a/block/export/fuse.c
+++ b/block/export/fuse.c
@@ -603,6 +603,35 @@ static void fuse_write(fuse_req_t req, fuse_ino_t inode,
const char *buf,
}
}
+static bool fuse_fallocate_punch_hole(fuse_req_t req, fuse_ino_t inode,
+ int mode, int64_t blk_len,
+ off_t offset, off_t *length)
+{
+ FuseExport *exp = fuse_req_userdata(req);
+
+ if (mode & FALLOC_FL_KEEP_SIZE) {
+ *length = MIN(*length, blk_len - offset);
+ }
+
+ if (mode & FALLOC_FL_PUNCH_HOLE) {
+ int ret;
+
+ if (!(mode & FALLOC_FL_KEEP_SIZE)) {
+ fuse_reply_err(req, EINVAL);
+ return false;
+ }
+
+ do {
+ int size = MIN(*length, BDRV_REQUEST_MAX_BYTES);
+
+ ret = blk_pdiscard(exp->common.blk, offset, size);
+ offset += size;
+ *length -= size;
+ } while (ret == 0 && *length > 0);
+ }
+ return true;
+}
+
static bool fuse_fallocate_zero_range(fuse_req_t req, fuse_ino_t inode,
int mode, int64_t blk_len,
off_t offset, off_t *length)
@@ -657,23 +686,8 @@ static void fuse_fallocate(fuse_req_t req, fuse_ino_t
inode, int mode,
return;
}
- if (mode & FALLOC_FL_KEEP_SIZE) {
- length = MIN(length, blk_len - offset);
- }
-
- if (mode & FALLOC_FL_PUNCH_HOLE) {
- if (!(mode & FALLOC_FL_KEEP_SIZE)) {
- fuse_reply_err(req, EINVAL);
- return;
- }
-
- do {
- int size = MIN(length, BDRV_REQUEST_MAX_BYTES);
-
- ret = blk_pdiscard(exp->common.blk, offset, size);
- offset += size;
- length -= size;
- } while (ret == 0 && length > 0);
+ if (!fuse_fallocate_punch_hole(req, inode, mode, blk_len, offset,
&length)) {
+ return;
} else if (!fuse_fallocate_zero_range(req, inode, blk_len, mode, offset,
&length)) {
return;
} else if (!mode) {
--
2.34.1