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NFSv4: Add support for readlink() 

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
libnfs-4.0.0-vitalif
Ronnie Sahlberg 2017-07-26 12:14:04 +10:00
parent f3211e9be5
commit 5c2d989887
4 changed files with 76 additions and 3 deletions
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2
include/libnfs-private.h
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@ -486,6 +486,8 @@ int nfs4_open_async(struct nfs_context *nfs, const char *path, int flags,
int nfs4_pread_async_internal(struct nfs_context *nfs, struct nfsfh *nfsfh,
uint64_t offset, size_t count, nfs_cb cb,
void *private_data, int update_pos);
int nfs4_readlink_async(struct nfs_context *nfs, const char *path, nfs_cb cb,
void *private_data);
int nfs4_rmdir_async(struct nfs_context *nfs, const char *path, nfs_cb cb,
void *private_data);
int nfs4_stat64_async(struct nfs_context *nfs, const char *path,

3
lib/libnfs-sync.c
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@ -1100,7 +1100,8 @@ nfs_readlink(struct nfs_context *nfs, const char *path, char *buf, int bufsize)
cb_data.return_int = bufsize;
if (nfs_readlink_async(nfs, path, readlink_cb, &cb_data) != 0) {
nfs_set_error(nfs, "nfs_readlink_async failed");
nfs_set_error(nfs, "nfs_readlink_async failed. %s",
nfs_get_error(nfs));
return -1;
}

6
lib/libnfs.c
View File

@ -1343,9 +1343,11 @@ nfs_readlink_async(struct nfs_context *nfs, const char *path, nfs_cb cb,
switch (nfs->version) {
case NFS_V3:
return nfs3_readlink_async(nfs, path, cb, private_data);
case NFS_V4:
return nfs4_readlink_async(nfs, path, cb, private_data);
default:
nfs_set_error(nfs, "%s does not support NFSv4",
__FUNCTION__);
nfs_set_error(nfs, "%s does not support NFSv%d",
__FUNCTION__, nfs->version);
return -1;
}
}

68
lib/nfs_v4.c
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@ -1938,3 +1938,71 @@ nfs4_symlink_async(struct nfs_context *nfs, const char *target,
return 0;
}
static void
nfs4_readlink_cb(struct rpc_context *rpc, int status, void *command_data,
void *private_data)
{
struct nfs4_cb_data *data = private_data;
struct nfs_context *nfs = data->nfs;
COMPOUND4res *res = command_data;
READLINK4resok *rlresok;
int i;
assert(rpc->magic == RPC_CONTEXT_MAGIC);
if (check_nfs4_error(nfs, status, data, res, "READLINK")) {
free_nfs4_cb_data(data);
return;
}
if ((i = nfs4_find_op(nfs, data, res, OP_READLINK, "READLINK")) < 0) {
return;
}
rlresok = &res->resarray.resarray_val[i].nfs_resop4_u.opreadlink.READLINK4res_u.resok4;
data->cb(0, nfs, rlresok->link.utf8string_val, data->private_data);
free_nfs4_cb_data(data);
}
static void
nfs4_populate_readlink(struct nfs4_cb_data *data, nfs_argop4 *op)
{
op[0].argop = OP_READLINK;
}
int
nfs4_readlink_async(struct nfs_context *nfs, const char *path, nfs_cb cb,
void *private_data)
{
struct nfs4_cb_data *data;
data = malloc(sizeof(*data));
if (data == NULL) {
nfs_set_error(nfs, "Out of memory. Failed to allocate "
"cb data");
return -1;
}
memset(data, 0, sizeof(*data));
data->nfs = nfs;
data->cb = cb;
data->private_data = private_data;
data->path = nfs4_resolve_path(nfs, path);
if (data->path == NULL) {
nfs_set_error(nfs, "Out of memory duplicating path");
free_nfs4_cb_data(data);
return -1;
}
data->filler.func = nfs4_populate_readlink;
data->filler.num_op = 1;
if (nfs4_lookup_path_async(nfs, data, nfs4_readlink_cb) < 0) {
free_nfs4_cb_data(data);
return -1;
}
return 0;
}