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util: virfile: Rewrite matching of FUSE-based shared filesystems

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'virFileIsSharedFixFUSE' was used to update the 'f_type' field for
certain shared filesystem types.

This patch renames it to 'virFileIsSharedFsFUSE' and makes it directly
return whether the FUSE filesystem is shared or not and simplifies
additions to the list of shared FUSE filesystems.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa 2022-09-05 14:05:55 +02:00
parent 51741c40b8
commit ad0cbefb13
1 changed files with 33 additions and 21 deletions
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54
src/util/virfile.c
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@ -3324,17 +3324,27 @@ virFileRemoveLastComponent(char *path)
# define PROC_MOUNTS "/proc/mounts"
struct virFileSharedFsData {
const char *mnttype;
unsigned int fstype;
};
static const struct virFileSharedFsData virFileSharedFsFUSE[] = {
{ .mnttype = "fuse.glusterfs", .fstype = VIR_FILE_SHFS_GFS2 },
{ .mnttype = "fuse.quobyte", .fstype = VIR_FILE_SHFS_QB },
};
static int
virFileIsSharedFixFUSE(const char *path,
long long *f_type)
virFileIsSharedFsFUSE(const char *path,
unsigned int fstypes)
{
FILE *f = NULL;
struct mntent mb;
char mntbuf[1024];
char *mntDir = NULL;
char *mntType = NULL;
g_autofree char *canonPath = NULL;
size_t maxMatching = 0;
bool isShared = false;
if (!(canonPath = virFileCanonicalizePath(path))) {
virReportSystemError(errno, _("unable to canonicalize %s"), path);
@ -3359,28 +3369,30 @@ virFileIsSharedFixFUSE(const char *path,
continue;
if (len > maxMatching) {
size_t i;
bool found = false;
for (i = 0; i < G_N_ELEMENTS(virFileSharedFsFUSE); i++) {
if (STREQ_NULLABLE(mb.mnt_type, virFileSharedFsFUSE[i].mnttype) &&
(fstypes & virFileSharedFsFUSE[i].fstype) > 0) {
found = true;
break;
}
}
VIR_DEBUG("Updating shared='%d' for mountpoint '%s' type '%s'",
found, p, mb.mnt_type);
isShared = found;
maxMatching = len;
VIR_FREE(mntType);
VIR_FREE(mntDir);
mntDir = g_strdup(mb.mnt_dir);
mntType = g_strdup(mb.mnt_type);
}
}
endmntent(f);
if (STREQ_NULLABLE(mntType, "fuse.glusterfs")) {
VIR_DEBUG("Found gluster FUSE mountpoint=%s for path=%s. "
"Fixing shared FS type", mntDir, canonPath);
*f_type = GFS2_MAGIC;
} else if (STREQ_NULLABLE(mntType, "fuse.quobyte")) {
VIR_DEBUG("Found Quobyte FUSE mountpoint=%s for path=%s. "
"Fixing shared FS type", mntDir, canonPath);
*f_type = QB_MAGIC;
}
if (isShared)
return 1;
VIR_FREE(mntType);
VIR_FREE(mntDir);
return 0;
}
@ -3432,8 +3444,8 @@ virFileIsSharedFSType(const char *path,
f_type = sb.f_type;
if (f_type == FUSE_SUPER_MAGIC) {
VIR_DEBUG("Found FUSE mount for path=%s. Trying to fix it", path);
virFileIsSharedFixFUSE(path, &f_type);
VIR_DEBUG("Found FUSE mount for path=%s", path);
return virFileIsSharedFsFUSE(path, fstypes);
}
VIR_DEBUG("Check if path %s with FS magic %lld is shared",