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| author | Thomas Huth <thuth@redhat.com> | 2021-12-15 13:58:24 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-01-12 14:09:04 +0100 |
| commit | a5730b8bd3675f484ed0eacea052452048eeb35d (patch) | |
| tree | a8e2a648ee519a5909f6143fd1d80aea973cc40a /block | |
| parent | 9d24fb73a1c1b0d892f8c26297f922c85460513d (diff) | |
| download | qemu-a5730b8bd3675f484ed0eacea052452048eeb35d.zip qemu-a5730b8bd3675f484ed0eacea052452048eeb35d.tar.gz qemu-a5730b8bd3675f484ed0eacea052452048eeb35d.tar.bz2 | |
block/file-posix: Simplify the XFS_IOC_DIOINFO handling
The handling for the XFS_IOC_DIOINFO ioctl is currently quite excessive:
This is not a "real" feature like the other features that we provide with
the "--enable-xxx" and "--disable-xxx" switches for the configure script,
since this does not influence lots of code (it's only about one call to
xfsctl() in file-posix.c), so people don't gain much with the ability to
disable this with "--disable-xfsctl".
It's also unfortunate that the ioctl will be disabled on Linux in case
the user did not install the right xfsprogs-devel package before running
configure. Thus let's simplify this by providing the ioctl definition
on our own, so we can completely get rid of the header dependency and
thus the related code in the configure script.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20211215125824.250091-1-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/file-posix.c | 37 |
1 files changed, 16 insertions, 21 deletions
diff --git a/block/file-posix.c b/block/file-posix.c index b283093..1f1756e 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -106,10 +106,6 @@ #include <sys/diskslice.h> #endif -#ifdef CONFIG_XFS -#include <xfs/xfs.h> -#endif - /* OS X does not have O_DSYNC */ #ifndef O_DSYNC #ifdef O_SYNC @@ -156,9 +152,6 @@ typedef struct BDRVRawState { int perm_change_flags; BDRVReopenState *reopen_state; -#ifdef CONFIG_XFS - bool is_xfs:1; -#endif bool has_discard:1; bool has_write_zeroes:1; bool discard_zeroes:1; @@ -409,14 +402,22 @@ static void raw_probe_alignment(BlockDriverState *bs, int fd, Error **errp) if (probe_logical_blocksize(fd, &bs->bl.request_alignment) < 0) { bs->bl.request_alignment = 0; } -#ifdef CONFIG_XFS - if (s->is_xfs) { - struct dioattr da; - if (xfsctl(NULL, fd, XFS_IOC_DIOINFO, &da) >= 0) { - bs->bl.request_alignment = da.d_miniosz; - /* The kernel returns wrong information for d_mem */ - /* s->buf_align = da.d_mem; */ - } + +#ifdef __linux__ + /* + * The XFS ioctl definitions are shipped in extra packages that might + * not always be available. Since we just need the XFS_IOC_DIOINFO ioctl + * here, we simply use our own definition instead: + */ + struct xfs_dioattr { + uint32_t d_mem; + uint32_t d_miniosz; + uint32_t d_maxiosz; + } da; + if (ioctl(fd, _IOR('X', 30, struct xfs_dioattr), &da) >= 0) { + bs->bl.request_alignment = da.d_miniosz; + /* The kernel returns wrong information for d_mem */ + /* s->buf_align = da.d_mem; */ } #endif @@ -798,12 +799,6 @@ static int raw_open_common(BlockDriverState *bs, QDict *options, #endif s->needs_alignment = raw_needs_alignment(bs); -#ifdef CONFIG_XFS - if (platform_test_xfs_fd(s->fd)) { - s->is_xfs = true; - } -#endif - bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK; if (S_ISREG(st.st_mode)) { /* When extending regular files, we get zeros from the OS */ |