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block/export/fuse: Fix build failure on FreeBSD 

When building on FreeBSD we get:

  [816/6851] Compiling C object libblockdev.fa.p/block_export_fuse.c.o
  ../block/export/fuse.c:628:16: error: use of undeclared identifier 'FALLOC_FL_KEEP_SIZE'
      if (mode & FALLOC_FL_KEEP_SIZE) {
                 ^
  ../block/export/fuse.c:651:16: error: use of undeclared identifier 'FALLOC_FL_PUNCH_HOLE'
      if (mode & FALLOC_FL_PUNCH_HOLE) {
                 ^
  ../block/export/fuse.c:652:22: error: use of undeclared identifier 'FALLOC_FL_KEEP_SIZE'
          if (!(mode & FALLOC_FL_KEEP_SIZE)) {
                       ^
  3 errors generated.
  FAILED: libblockdev.fa.p/block_export_fuse.c.o

Meson indeed reported FALLOC_FL_PUNCH_HOLE is not available:

  C compiler for the host machine: cc (clang 10.0.1 "FreeBSD clang version 10.0.1")
  Checking for function "fallocate" : NO
  Checking for function "posix_fallocate" : YES
  Header <linux/falloc.h> has symbol "FALLOC_FL_PUNCH_HOLE" : NO
  Header <linux/falloc.h> has symbol "FALLOC_FL_ZERO_RANGE" : NO
  ...

Similarly to commit 304332039 ("block/export/fuse.c: fix musl build"),
guard the code requiring FALLOC_FL_KEEP_SIZE / FALLOC_FL_PUNCH_HOLE
definitions under CONFIG_FALLOCATE_PUNCH_HOLE #ifdef'ry.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220201112655.344373-3-f4bug@amsat.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Philippe Mathieu-Daudé 2022-02-01 12:26:55 +01:00 committed by Kevin Wolf
parent ac50419460
commit 3c9c70347b
1 changed files with 4 additions and 0 deletions
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4
block/export/fuse.c
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@ -625,9 +625,11 @@ static void fuse_fallocate(fuse_req_t req, fuse_ino_t inode, int mode,
return;
}
#ifdef CONFIG_FALLOCATE_PUNCH_HOLE
if (mode & FALLOC_FL_KEEP_SIZE) {
length = MIN(length, blk_len - offset);
}
#endif /* CONFIG_FALLOCATE_PUNCH_HOLE */
if (!mode) {
/* We can only fallocate at the EOF with a truncate */
@ -648,6 +650,7 @@ static void fuse_fallocate(fuse_req_t req, fuse_ino_t inode, int mode,
ret = fuse_do_truncate(exp, offset + length, true,
PREALLOC_MODE_FALLOC);
}
#ifdef CONFIG_FALLOCATE_PUNCH_HOLE
else if (mode & FALLOC_FL_PUNCH_HOLE) {
if (!(mode & FALLOC_FL_KEEP_SIZE)) {
fuse_reply_err(req, EINVAL);
@ -662,6 +665,7 @@ static void fuse_fallocate(fuse_req_t req, fuse_ino_t inode, int mode,
length -= size;
} while (ret == 0 && length > 0);
}
#endif /* CONFIG_FALLOCATE_PUNCH_HOLE */
#ifdef CONFIG_FALLOCATE_ZERO_RANGE
else if (mode & FALLOC_FL_ZERO_RANGE) {
if (!(mode & FALLOC_FL_KEEP_SIZE) && offset + length > blk_len) {