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linux: libshare/nfs: don't do anything unless exportfs is available 

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13165
Closes #13324
This commit is contained in:
наб 2022-04-17 15:03:03 +02:00 committed by Brian Behlendorf
parent 086af23e68
commit 53600767ee
1 changed files with 30 additions and 0 deletions
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30
lib/libshare/os/linux/nfs.c
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@ -45,6 +45,9 @@
#define ZFS_EXPORTS_FILE ZFS_EXPORTS_DIR"/zfs.exports"
#define ZFS_EXPORTS_LOCK ZFS_EXPORTS_FILE".lock"
static boolean_t nfs_available(void);
typedef int (*nfs_shareopt_callback_t)(const char *opt, const char *value,
void *cookie);
@ -424,6 +427,9 @@ nfs_enable_share_impl(sa_share_impl_t impl_share, FILE *tmpfile)
static int
nfs_enable_share(sa_share_impl_t impl_share)
{
if (!nfs_available())
return (SA_SYSTEM_ERR);
return (nfs_toggle_share(
ZFS_EXPORTS_LOCK, ZFS_EXPORTS_FILE, ZFS_EXPORTS_DIR, impl_share,
nfs_enable_share_impl));
@ -442,6 +448,9 @@ nfs_disable_share_impl(sa_share_impl_t impl_share, FILE *tmpfile)
static int
nfs_disable_share(sa_share_impl_t impl_share)
{
if (!nfs_available())
return (SA_SYSTEM_ERR);
return (nfs_toggle_share(
ZFS_EXPORTS_LOCK, ZFS_EXPORTS_FILE, ZFS_EXPORTS_DIR, impl_share,
nfs_disable_share_impl));
@ -450,6 +459,9 @@ nfs_disable_share(sa_share_impl_t impl_share)
static boolean_t
nfs_is_shared(sa_share_impl_t impl_share)
{
if (!nfs_available())
return (SA_SYSTEM_ERR);
return (nfs_is_shared_impl(ZFS_EXPORTS_FILE, impl_share));
}
@ -471,6 +483,9 @@ nfs_validate_shareopts(const char *shareopts)
static int
nfs_commit_shares(void)
{
if (!nfs_available())
return (SA_SYSTEM_ERR);
char *argv[] = {
(char *)"/usr/sbin/exportfs",
(char *)"-ra",
@ -488,3 +503,18 @@ const sa_fstype_t libshare_nfs_type = {
.validate_shareopts = nfs_validate_shareopts,
.commit_shares = nfs_commit_shares,
};
static boolean_t
nfs_available(void)
{
static int avail;
if (!avail) {
if (access("/usr/sbin/exportfs", F_OK) != 0)
avail = -1;
else
avail = 1;
}
return (avail == 1);
}