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nuttx/fs/v9fs/client.c
chenrun1 a7f5c37a63 v9fs/client.c:fix in x86 qemu crash 
Summary:
  In the x86 environment, memory does not necessarily start at 0, so when end is 0x0, start = end + 1, and then determine the contents of start, it will cause x86 to cause a crash when accessing an illegal address.
This problem does not occur in the arm environment because arm starts at 0x0, so the content of the 0x1 address is “\0”.

Signed-off-by: chenrun1 <chenrun1@xiaomi.com>
2024-08-19 11:05:40 -03:00

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/****************************************************************************
* fs/v9fs/client.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/param.h>
#include <fcntl.h>
#include <nuttx/semaphore.h>
#include <nuttx/kmalloc.h>
#include <nuttx/fs/fs.h>
#include <nuttx/lib/lib.h>
#include "client.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* 9P Magic Numbers */
#define V9FS_NOTAG ((uint16_t)(~0))
#define V9FS_NOFID ((uint32_t)(~0))
#define V9FS_HDRSZ 7 /* size[4] type[1] tag[2] */
#define V9FS_IOHDRSZ 24 /* Reserve enough space for
* TWRITE/TREAD
*/
#define V9FS_READDIRHDRSZ 24 /* Reserve enough space for
* READDIR
*/
#define V9FS_BIT8SZ 1 /* uint8 -> V9FS_BIT8SZ */
#define V9FS_BIT16SZ 2 /* uint16 -> V9FS_BIT16SZ */
#define V9FS_BIT32SZ 4 /* uint32 -> V9FS_BIT32SZ */
#define V9FS_BIT64SZ 8 /* uint64 -> V9FS_BIT64SZ */
#define V9FS_DEFAULT_VERSION "9P2000.L" /* Current implementations are
* based on the "9P2000L"
* protocol.
*/
/* 9P setattr valid bits */
#define V9FS_SETATTR_MODE (1 << 0)
#define V9FS_SETATTR_UID (1 << 1)
#define V9FS_SETATTR_GID (1 << 2)
#define V9FS_SETATTR_SIZE (1 << 3)
#define V9FS_SETATTR_ATIME (1 << 4)
#define V9FS_SETATTR_MTIME (1 << 5)
#define V9FS_SETATTR_CTIME (1 << 6)
#define V9FS_SETATTR_ATIMESET (1 << 7)
#define V9FS_SETATTR_MTIMESET (1 << 8)
/* 9P2000.L open flags */
#define V9FS_RDONLY 00000000
#define V9FS_WRONLY 00000001
#define V9FS_RDWR 00000002
#define V9FS_CREATE 00000100
#define V9FS_EXCL 00000200
#define V9FS_NOCTTY 00000400
#define V9FS_TRUNC 00001000
#define V9FS_APPEND 00002000
#define V9FS_NONBLOCK 00004000
#define V9FS_DSYNC 00010000
#define V9FS_FASYNC 00020000
#define V9FS_DIRECT 00040000
#define V9FS_DIRECTORY 00200000
#define V9FS_NOFOLLOW 00400000
#define V9FS_NOATIME 01000000
#define V9FS_CLOEXEC 02000000
#define V9FS_SYNC 04000000
/* 9P2000.L stat flags */
#define V9FS_STATS_ALL 0x00003fff
/* 9P2000.L unlink flags */
#define V9FS_REMOVEDIR 0x200
/* QID = uint8_t (type) + uint32_t (version) + uint64_t (path) */
#define V9FS_QIDSZ (V9FS_BIT8SZ + V9FS_BIT32SZ + V9FS_BIT64SZ)
/****************************************************************************
* Private Types
****************************************************************************/
enum v9fs_flags_e
{
V9FS_TLERROR = 6,
V9FS_RLERROR,
V9FS_TSTATFS = 8,
V9FS_RSTATFS,
V9FS_TLOPEN = 12,
V9FS_RLOPEN,
V9FS_TLCREATE = 14,
V9FS_RLCREATE,
V9FS_TRENAME = 20,
V9FS_RRENAME,
V9FS_TGETATTR = 24,
V9FS_RGETATTR,
V9FS_TSETATTR = 26,
V9FS_RSETATTR,
V9FS_TREADDIR = 40,
V9FS_RREADDIR,
V9FS_TFSYNC = 50,
V9FS_RFSYNC,
V9FS_TMKDIR = 72,
V9FS_RMKDIR,
V9FS_TRENAMEAT = 74,
V9FS_RRENAMEAT,
V9FS_TUNLINKAT = 76,
V9FS_RUNLINKAT,
V9FS_TVERSION = 100,
V9FS_RVERSION,
V9FS_TATTACH = 104,
V9FS_RATTACH,
V9FS_TERROR = 106,
V9FS_RERROR,
V9FS_TWALK = 110,
V9FS_RWALK,
V9FS_TREAD = 116,
V9FS_RREAD,
V9FS_TWRITE = 118,
V9FS_RWRITE,
V9FS_TCLUNK = 120,
V9FS_RCLUNK,
V9FS_TREMOVE = 122,
V9FS_RREMOVE,
V9FS_TSTAT = 124,
V9FS_RSTAT,
V9FS_TWSTAT = 126,
V9FS_RWSTAT,
};
begin_packed_struct struct v9fs_qid_s
{
uint8_t type;
uint32_t version;
uint64_t path;
} end_packed_struct;
begin_packed_struct struct v9fs_header_s
{
uint32_t size;
uint8_t type;
uint16_t tag;
} end_packed_struct;
begin_packed_struct struct v9fs_attach_s
{
struct v9fs_header_s header;
uint32_t fid;
uint16_t afid;
uint8_t buffer[2 * (V9FS_BIT16SZ + NAME_MAX) + V9FS_BIT32SZ];
} end_packed_struct;
begin_packed_struct struct v9fs_rattach_s
{
struct v9fs_header_s header;
struct v9fs_qid_s qid;
} end_packed_struct;
begin_packed_struct struct v9fs_clunk_s
{
struct v9fs_header_s header;
uint32_t fid;
} end_packed_struct;
#define v9fs_remove_s v9fs_clunk_s
begin_packed_struct struct v9fs_version_s
{
struct v9fs_header_s header;
uint32_t msize;
uint16_t version_len;
char version[NAME_MAX];
} end_packed_struct;
begin_packed_struct struct v9fs_setattr_s
{
struct v9fs_header_s header;
uint32_t fid;
uint32_t valid;
uint32_t mode;
uint32_t uid;
uint32_t gid;
uint64_t size;
uint64_t atime_sec;
uint64_t atime_nsec;
uint64_t mtime_sec;
uint64_t mtime_nsec;
} end_packed_struct;
begin_packed_struct struct v9fs_mkdir_s
{
struct v9fs_header_s header;
uint32_t fid;
uint16_t name_len;
uint8_t buffer[NAME_MAX + V9FS_BIT32SZ * 2];
} end_packed_struct;
#define v9fs_rmkdir_s v9fs_rattach_s
begin_packed_struct struct v9fs_unlink_s
{
struct v9fs_header_s header;
uint32_t fid;
uint16_t name_len;
uint8_t buffer[NAME_MAX + V9FS_BIT32SZ];
} end_packed_struct;
begin_packed_struct struct v9fs_lerror_s
{
struct v9fs_header_s header;
uint32_t ecode;
} end_packed_struct;
begin_packed_struct struct v9fs_open_s
{
struct v9fs_header_s header;
uint32_t fid;
uint32_t flags;
} end_packed_struct;
begin_packed_struct struct v9fs_ropen_s
{
struct v9fs_header_s header;
struct v9fs_qid_s qid;
uint32_t iounit;
} end_packed_struct;
begin_packed_struct struct v9fs_create_s
{
struct v9fs_header_s header;
uint32_t fid;
uint16_t name_len;
uint8_t buffer[NAME_MAX + V9FS_BIT32SZ * 3];
} end_packed_struct;
#define v9fs_rcreate_s v9fs_ropen_s
begin_packed_struct struct v9fs_walk_s
{
struct v9fs_header_s header;
uint32_t fid;
uint32_t newfid;
uint16_t nwname;
} end_packed_struct;
begin_packed_struct struct v9fs_rwalk_s
{
struct v9fs_header_s header;
uint16_t nwqid;
struct v9fs_qid_s wqid[1];
} end_packed_struct;
begin_packed_struct struct v9fs_write_s
{
struct v9fs_header_s header;
uint32_t fid;
uint64_t offset;
uint32_t count;
} end_packed_struct;
begin_packed_struct struct v9fs_rwrite_s
{
struct v9fs_header_s header;
uint32_t count;
} end_packed_struct;
#define v9fs_read_s v9fs_write_s
#define v9fs_rread_s v9fs_rwrite_s
#define v9fs_readdir_s v9fs_write_s
#define v9fs_rreaddir_s v9fs_rwrite_s
begin_packed_struct struct v9fs_fsync_s
{
struct v9fs_header_s header;
uint32_t fid;
uint32_t datasync;
} end_packed_struct;
begin_packed_struct struct v9fs_rename_s
{
struct v9fs_header_s header;
uint32_t fid;
uint32_t newfid;
uint16_t name_len;
uint8_t buffer[NAME_MAX];
} end_packed_struct;
begin_packed_struct struct v9fs_stat_s
{
struct v9fs_header_s header;
uint32_t fid;
uint64_t mask;
} end_packed_struct;
begin_packed_struct struct v9fs_rstat_s
{
struct v9fs_header_s header;
uint64_t vaild;
struct v9fs_qid_s qid;
uint32_t mode;
uint32_t uid;
uint32_t gid;
uint64_t nlink;
uint64_t rdev;
uint64_t size;
uint64_t blksize;
uint64_t blocks;
uint64_t atime_sec;
uint64_t atime_nsec;
uint64_t mtime_sec;
uint64_t mtime_nsec;
uint64_t ctime_sec;
uint64_t ctime_nsec;
uint64_t btime_sec;
uint64_t btime_nsec;
uint64_t gen;
uint64_t data_version;
} end_packed_struct;
#define v9fs_statfs_s v9fs_clunk_s
begin_packed_struct struct v9fs_rstatfs_s
{
struct v9fs_header_s header;
uint32_t type; /* Type of file system (see below) */
uint32_t bsize; /* Optimal transfer block size */
uint64_t blocks; /* Total data blocks in file system */
uint64_t bfree; /* Free blocks in fs */
uint64_t bavail; /* Free blocks avail to non-superuser */
uint64_t files; /* Total file nodes in file system */
uint64_t ffree; /* Free file nodes in fs */
uint64_t fsid; /* File system id */
uint32_t namelen; /* Maximum length of filenames */
} end_packed_struct;
struct v9fs_map_s
{
int original;
int conversion;
};
struct v9fs_fid_s
{
uint32_t iounit;
uint32_t refcount;
char relpath[1];
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* v9fs_get_tagid
****************************************************************************/
static inline uint16_t v9fs_get_tagid(FAR struct v9fs_client_s *client)
{
uint16_t tag;
nxmutex_lock(&client->lock);
tag = client->tag_id;
client->tag_id++;
if (client->tag_id == V9FS_NOTAG)
{
/* Bypassing V9FS_NOTAG */
client->tag_id = 1;
}
nxmutex_unlock(&client->lock);
return tag;
}
/****************************************************************************
* v9fs_map_setattr_flags
****************************************************************************/
static uint32_t v9fs_map_setattr_flags(int flags)
{
uint32_t rflags = 0;
size_t i;
static const struct v9fs_map_s flags_map[] =
{
{ CH_STAT_MODE, V9FS_SETATTR_MODE },
{ CH_STAT_UID, V9FS_SETATTR_UID },
{ CH_STAT_GID, V9FS_SETATTR_GID },
{ CH_STAT_SIZE, V9FS_SETATTR_SIZE },
{ CH_STAT_ATIME, V9FS_SETATTR_ATIMESET },
{ CH_STAT_MTIME, V9FS_SETATTR_MTIMESET },
};
for (i = 0; i < nitems(flags_map); i++)
{
if (flags & flags_map[i].original)
{
rflags |= flags_map[i].conversion;
}
}
return rflags;
}
/****************************************************************************
* v9fs_map_open_flags
****************************************************************************/
static uint32_t v9fs_map_open_flags(int flags)
{
uint32_t rflags = 0;
size_t i;
static const struct v9fs_map_s flags_map[] =
{
{ O_CREAT, V9FS_CREATE },
{ O_NOCTTY, V9FS_NOCTTY },
{ O_TRUNC, V9FS_TRUNC},
{ O_APPEND, V9FS_APPEND },
{ O_NONBLOCK, V9FS_NONBLOCK },
{ O_DSYNC, V9FS_DSYNC },
{ FASYNC, V9FS_FASYNC },
{ O_DIRECT, V9FS_DIRECT },
{ O_DIRECTORY, V9FS_DIRECTORY },
{ O_NOFOLLOW, V9FS_NOFOLLOW },
{ O_NOATIME, V9FS_NOATIME },
{ O_CLOEXEC, V9FS_CLOEXEC },
{ O_EXCL, V9FS_EXCL },
{ O_SYNC, V9FS_SYNC},
};
switch (flags & 3)
{
case O_RDONLY:
rflags |= V9FS_RDONLY;
break;
case O_WRONLY:
rflags |= V9FS_WRONLY;
break;
case O_RDWR:
rflags |= V9FS_RDWR;
break;
}
for (i = 0; i < nitems(flags_map); i++)
{
if (flags & flags_map[i].original)
{
rflags |= flags_map[i].conversion;
}
}
return rflags;
}
/****************************************************************************
* v9fs_fid_create
****************************************************************************/
static int v9fs_fid_create(FAR struct v9fs_client_s *client,
FAR const char *relpath)
{
FAR struct v9fs_fid_s *fid;
size_t len;
int ret;
len = strlen(relpath);
fid = kmm_zalloc(sizeof(struct v9fs_fid_s) + len);
if (fid == NULL)
{
return -ENOMEM;
}
fid->refcount = 1;
nxmutex_lock(&client->lock);
ret = idr_alloc(client->fids, fid, 0, 0);
nxmutex_unlock(&client->lock);
if (ret >= 0)
{
memcpy(fid->relpath, relpath, len + 1);
return ret;
}
/* Failed to initialize fid */
kmm_free(fid);
return ret;
}
/****************************************************************************
* v9fs_fid_destroy
****************************************************************************/
static void v9fs_fid_destroy(FAR struct v9fs_client_s *client,
uint32_t fid)
{
FAR struct v9fs_fid_s *fidp;
nxmutex_lock(&client->lock);
fidp = idr_find(client->fids, fid);
if (fidp == NULL)
{
nxmutex_unlock(&client->lock);
return;
}
idr_remove(client->fids, fid);
nxmutex_unlock(&client->lock);
kmm_free(fidp);
}
/****************************************************************************
* v9fs_client_rpc
****************************************************************************/
static int v9fs_client_rpc(FAR struct v9fs_transport_s *transport,
FAR struct iovec *wiov, size_t wcount,
FAR struct iovec *riov, size_t rcount,
uint16_t tag)
{
struct v9fs_payload_s payload;
int ret;
nxsem_init(&payload.resp, 0, 0);
payload.wiov = wiov;
payload.riov = riov;
payload.wcount = wcount;
payload.rcount = rcount;
payload.tag = tag;
payload.ret = -EIO;
ret = v9fs_transport_request(transport, &payload);
if (ret < 0)
{
nxsem_destroy(&payload.resp);
return ret;
}
nxsem_wait(&payload.resp);
nxsem_destroy(&payload.resp);
return payload.ret;
}
/****************************************************************************
* v9fs_client_clunk
****************************************************************************/
static int v9fs_client_clunk(FAR struct v9fs_client_s *client,
uint32_t fid)
{
struct v9fs_clunk_s request;
struct v9fs_lerror_s response;
struct iovec wiov[1];
struct iovec riov[1];
int ret;
/* size[4] Tclunk tag[2] fid[4]
* size[4] Rclunk tag[2]
*/
request.header.size = V9FS_HDRSZ + V9FS_BIT32SZ;
request.header.type = V9FS_TCLUNK;
request.header.tag = v9fs_get_tagid(client);
request.fid = fid;
/* A free buffer is reserved at the time of receipt to handle whether
* there is an error number message
*/
wiov[0].iov_base = &request;
wiov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ;
riov[0].iov_base = &response;
riov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ;
ret = v9fs_client_rpc(client->transport, wiov, 1, riov, 1,
request.header.tag);
/* Even if the clunk returns an error, the fid is no longer valid for
* the server, so we need to remove the fid on the client side.
*/
v9fs_fid_destroy(client, fid);
return ret;
}
/****************************************************************************
* v9fs_client_attach
****************************************************************************/
static int v9fs_client_attach(FAR struct v9fs_client_s *client, uint32_t fid,
FAR const char *uname, FAR const char *aname)
{
struct v9fs_attach_s request;
struct v9fs_rattach_s response;
struct iovec wiov[1];
struct iovec riov[1];
uint16_t uname_len = strlen(uname);
uint16_t aname_len = strlen(aname);
uint32_t uid = getuid();
off_t offset = 0;
uint32_t newfid;
int ret;
/* size[4] Tattach tag[2] fid[4] afid[4] uname[s] aname[s] n_uname[4]
* size[4] Rattach tag[2] qid[13]
*/
ret = v9fs_fid_create(client, "");
if (ret < 0)
{
return ret;
}
newfid = ret;
request.header.size = V9FS_HDRSZ + V9FS_BIT32SZ * 3 + V9FS_BIT16SZ * 2 +
uname_len + aname_len;
request.header.type = V9FS_TATTACH;
request.header.tag = v9fs_get_tagid(client);
request.fid = newfid;
request.afid = fid;
memcpy(&request.buffer[offset], &uname_len, V9FS_BIT16SZ);
offset += V9FS_BIT16SZ;
memcpy(&request.buffer[offset], uname, uname_len);
offset += uname_len;
memcpy(&request.buffer[offset], &aname_len, V9FS_BIT16SZ);
offset += V9FS_BIT16SZ;
memcpy(&request.buffer[offset], aname, aname_len);
offset += aname_len;
memcpy(&request.buffer[offset], &uid, V9FS_BIT32SZ);
wiov[0].iov_base = &request;
wiov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ * 3 + V9FS_BIT16SZ * 2 +
uname_len + aname_len;
riov[0].iov_base = &response;
riov[0].iov_len = V9FS_HDRSZ + V9FS_QIDSZ;
ret = v9fs_client_rpc(client->transport, wiov, 1, riov, 1,
request.header.tag);
if (ret < 0)
{
v9fs_fid_destroy(client, newfid);
return ret;
}
return newfid;
}
/****************************************************************************
* v9fs_client_version
****************************************************************************/
static int v9fs_client_version(FAR struct v9fs_client_s *client)
{
struct v9fs_version_s request;
struct v9fs_version_s response;
struct iovec wiov[1];
struct iovec riov[1];
int len = strlen(V9FS_DEFAULT_VERSION);
int ret;
/* size[4] Tversion tag[2] msize[4] version[s]
* size[4] Rversion tag[2] msize[4] version[s]
*/
request.header.size = V9FS_HDRSZ + V9FS_BIT32SZ + V9FS_BIT16SZ + len;
request.header.type = V9FS_TVERSION;
request.header.tag = V9FS_NOTAG;
request.msize = client->msize;
request.version_len = len;
memcpy(request.version, V9FS_DEFAULT_VERSION, len);
wiov[0].iov_base = &request;
wiov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ + V9FS_BIT16SZ + len;
riov[0].iov_base = &response;
riov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ + V9FS_BIT16SZ + len;
ret = v9fs_client_rpc(client->transport, wiov, 1, riov, 1,
request.header.tag);
if (ret < 0)
{
return ret;
}
if (memcmp(response.version, V9FS_DEFAULT_VERSION, len))
{
return -EREMOTEIO;
}
if (response.msize < client->msize)
{
client->msize = response.msize;
}
return 0;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* v9fs_client_statfs
****************************************************************************/
int v9fs_client_statfs(FAR struct v9fs_client_s *client,
FAR struct statfs *buf)
{
struct v9fs_statfs_s request;
struct v9fs_rstatfs_s response;
struct iovec wiov[1];
struct iovec riov[1];
int ret;
/* size[4] Tstatfs tag[2] fid[4]
* size[4] Rstatfs tag[2] type[4] bsize[4] blocks[8] bfree[8] bavail[8]
* files[8] ffree[8] fsid[8] namelen[4]
*/
request.header.size = V9FS_HDRSZ + V9FS_BIT32SZ;
request.header.type = V9FS_TSTATFS;
request.header.tag = v9fs_get_tagid(client);
request.fid = client->root_fid;
wiov[0].iov_base = &request;
wiov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ;
riov[0].iov_base = &response;
riov[0].iov_len = sizeof(response);
ret = v9fs_client_rpc(client->transport, wiov, 1, riov, 1,
request.header.tag);
if (ret < 0)
{
return ret;
}
buf->f_bsize = response.bsize;
buf->f_blocks = response.blocks;
buf->f_bfree = response.bfree;
buf->f_bavail = response.bavail;
buf->f_files = response.files;
buf->f_ffree = response.ffree;
buf->f_namelen = response.namelen;
buf->f_type = V9FS_MAGIC;
return 0;
}
/****************************************************************************
* v9fs_client_stat
****************************************************************************/
int v9fs_client_stat(FAR struct v9fs_client_s *client, uint32_t fid,
FAR struct stat *buf)
{
struct v9fs_stat_s request;
struct v9fs_rstat_s response;
struct iovec wiov[1];
struct iovec riov[1];
int ret;
/* size[4] Tgetattr tag[2] fid[4] request_mask[8]
* size[4] Rgetattr tag[2] valid[8] qid[13] mode[4] uid[4] gid[4] nlink[8]
* rdev[8] size[8] blksize[8] blocks[8]
* atime_sec[8] atime_nsec[8] mtime_sec[8] mtime_nsec[8]
* ctime_sec[8] ctime_nsec[8] btime_sec[8] btime_nsec[8]
* gen[8] data_version[8]
*/
request.header.size = V9FS_HDRSZ + V9FS_BIT32SZ + V9FS_BIT64SZ;
request.header.type = V9FS_TGETATTR;
request.header.tag = v9fs_get_tagid(client);
request.fid = fid;
request.mask = V9FS_STATS_ALL;
wiov[0].iov_base = &request;
wiov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ + V9FS_BIT64SZ;
riov[0].iov_base = &response;
riov[0].iov_len = sizeof(response);
ret = v9fs_client_rpc(client->transport, wiov, 1, riov, 1,
request.header.tag);
if (ret < 0)
{
return ret;
}
buf->st_mode = response.mode;
buf->st_uid = response.uid;
buf->st_gid = response.gid;
buf->st_nlink = response.nlink;
buf->st_rdev = response.rdev;
buf->st_size = response.size;
buf->st_blksize = response.blksize;
buf->st_blocks = response.blocks;
buf->st_atim.tv_sec = response.atime_sec;
buf->st_atim.tv_nsec = response.atime_nsec;
buf->st_mtim.tv_sec = response.mtime_sec;
buf->st_mtim.tv_nsec = response.mtime_nsec;
buf->st_ctim.tv_sec = response.ctime_sec;
buf->st_ctim.tv_nsec = response.ctime_nsec;
return 0;
}
/****************************************************************************
* v9fs_client_getsize
****************************************************************************/
off_t v9fs_client_getsize(FAR struct v9fs_client_s *client, uint32_t fid)
{
struct stat buf;
int ret;
ret = v9fs_client_stat(client, fid, &buf);
if (ret < 0)
{
return ret;
}
return buf.st_size;
}
/****************************************************************************
* v9fs_client_chstat
****************************************************************************/
int v9fs_client_chstat(FAR struct v9fs_client_s *client, uint32_t fid,
FAR const struct stat *buf, int flags)
{
struct v9fs_setattr_s request;
struct v9fs_lerror_s response;
struct iovec wiov[1];
struct iovec riov[1];
/* size[4] Tsetattr tag[2] fid[4] valid[4] mode[4] uid[4] gid[4] size[8]
* atime_sec[8] atime_nsec[8] mtime_sec[8] mtime_nsec[8]
* size[4] Rsetattr tag[2]
*/
request.header.size = V9FS_HDRSZ + V9FS_BIT32SZ * 5 + V9FS_BIT64SZ * 5;
request.header.type = V9FS_TSETATTR;
request.header.tag = v9fs_get_tagid(client);
request.fid = fid;
request.valid = v9fs_map_setattr_flags(flags);
request.mode = v9fs_map_open_flags(buf->st_mode);
request.uid = buf->st_uid;
request.gid = buf->st_gid;
request.size = buf->st_size;
request.atime_sec = buf->st_atim.tv_sec;
request.atime_nsec = buf->st_atim.tv_nsec;
request.mtime_sec = buf->st_mtim.tv_sec;
request.mtime_nsec = buf->st_mtim.tv_nsec;
/* A free buffer is reserved at the time of receipt to handle whether
* there is an error number message
*/
wiov[0].iov_base = &request;
wiov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ * 5 + V9FS_BIT64SZ * 5;
riov[0].iov_base = &response;
riov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ;
return v9fs_client_rpc(client->transport, wiov, 1, riov, 1,
request.header.tag);
}
/****************************************************************************
* v9fs_client_read
****************************************************************************/
ssize_t v9fs_client_read(FAR struct v9fs_client_s *client, uint32_t fid,
FAR void *buffer, off_t offset, size_t buflen)
{
FAR struct v9fs_fid_s *fidp;
struct v9fs_read_s request;
struct v9fs_rread_s response;
struct iovec wiov[1];
struct iovec riov[2];
size_t nread = 0;
int ret = 0;
/* size[4] Tread tag[2] fid[4] offset[8] count[4]
* size[4] Rread tag[2] count[4] data[count]
*/
fidp = idr_find(client->fids, fid);
if (fidp == NULL)
{
return -ENOENT;
}
while (buflen > 0)
{
request.header.size = V9FS_HDRSZ + V9FS_BIT32SZ + V9FS_BIT64SZ +
V9FS_BIT32SZ;
request.header.type = V9FS_TREAD;
request.header.tag = v9fs_get_tagid(client);
request.fid = fid;
request.offset = offset;
request.count = buflen > fidp->iounit ? fidp->iounit : buflen;
wiov[0].iov_base = &request;
wiov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ + V9FS_BIT64SZ +
V9FS_BIT32SZ;
riov[0].iov_base = &response;
riov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ;
riov[1].iov_base = (FAR void *)buffer;
riov[1].iov_len = request.count;
ret = v9fs_client_rpc(client->transport, wiov, 1, riov, 2,
request.header.tag);
if (ret < 0)
{
break;
}
if (response.count == 0)
{
break;
}
nread += response.count;
offset += response.count;
buffer += response.count;
buflen -= response.count;
}
return nread ? nread : ret;
}
/****************************************************************************
* v9fs_client_readdir
****************************************************************************/
ssize_t v9fs_client_readdir(FAR struct v9fs_client_s *client, uint32_t fid,
FAR void *buffer, off_t offset, size_t buflen)
{
FAR struct v9fs_fid_s *fidp;
struct v9fs_readdir_s request;
struct v9fs_rreaddir_s response;
struct iovec wiov[1];
struct iovec riov[2];
int ret;
/* size[4] Treaddir tag[2] fid[4] offset[8] count[4]
* size[4] Rreaddir tag[2] count[4] data[count]
*/
fidp = idr_find(client->fids, fid);
if (fidp == NULL)
{
return -ENOENT;
}
request.header.size = V9FS_HDRSZ + V9FS_BIT32SZ + V9FS_BIT64SZ +
V9FS_BIT32SZ;
request.header.type = V9FS_TREADDIR;
request.header.tag = v9fs_get_tagid(client);
request.fid = fid;
request.offset = offset;
request.count = buflen > fidp->iounit ? fidp->iounit : buflen;
wiov[0].iov_base = &request;
wiov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ + V9FS_BIT64SZ + V9FS_BIT32SZ;
riov[0].iov_base = &response;
riov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ;
riov[1].iov_base = buffer;
riov[1].iov_len = request.count;
ret = v9fs_client_rpc(client->transport, wiov, 1, riov, 2,
request.header.tag);
if (ret < 0)
{
return ret;
}
return response.count;
}
/****************************************************************************
* v9fs_client_convertdir
****************************************************************************/
ssize_t v9fs_client_convertdir(FAR const uint8_t *buffer, size_t bufsize,
off_t head, FAR off_t *offset,
FAR struct dirent *entry)
{
uint64_t off;
uint16_t name_len;
off_t next = head;
/* Ensure there is enough data for the fixed parts
* (qid, offset, type, name_len)
*/
if (bufsize < V9FS_QIDSZ + V9FS_BIT64SZ + V9FS_BIT8SZ + V9FS_BIT16SZ)
{
return -EIO;
}
/* Skip the qid part (13 Bytes) */
next += V9FS_QIDSZ;
/* Read the offset (8 bytes) */
memcpy(&off, buffer + next, sizeof(uint64_t));
next += sizeof(uint64_t);
/* Read the type (1 byte) */
memcpy(&entry->d_type, buffer + next, sizeof(uint8_t));
next += sizeof(uint8_t);
/* Read the name_len (2 bytes) */
memcpy(&name_len, buffer + next, sizeof(uint16_t));
next += sizeof(uint16_t);
/* Ensure there is enough data for the name */
if (bufsize - next < name_len)
{
return -EIO;
}
/* Copy the file name to entry->d_name and null-terminate it */
if (name_len > NAME_MAX)
{
return -ENAMETOOLONG;
}
memcpy(entry->d_name, buffer + next, name_len);
entry->d_name[name_len] = '\0';
next += name_len;
*offset = off;
return next - head;
}
/****************************************************************************
* v9fs_client_write
****************************************************************************/
ssize_t v9fs_client_write(FAR struct v9fs_client_s *client, uint32_t fid,
FAR const void *buffer, off_t offset,
size_t buflen)
{
FAR struct v9fs_fid_s *fidp;
struct v9fs_write_s request;
struct v9fs_rwrite_s response;
struct iovec wiov[2];
struct iovec riov[1];
size_t nwrite = 0;
int ret = 0;
/* size[4] Twrite tag[2] fid[4] offset[8] count[4] data[count]
* size[4] Rwrite tag[2] count[4]
*/
fidp = idr_find(client->fids, fid);
if (fidp == NULL)
{
return -ENOENT;
}
while (buflen > 0)
{
request.header.size = V9FS_HDRSZ + V9FS_BIT32SZ + V9FS_BIT64SZ +
V9FS_BIT32SZ + request.count;
request.header.type = V9FS_TWRITE;
request.header.tag = v9fs_get_tagid(client);
request.fid = fid;
request.offset = offset;
request.count = buflen > fidp->iounit ? fidp->iounit : buflen;
wiov[0].iov_base = &request;
wiov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ + V9FS_BIT64SZ +
V9FS_BIT32SZ;
wiov[1].iov_base = (FAR void *)buffer;
wiov[1].iov_len = request.count;
riov[0].iov_base = &response;
riov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ;
ret = v9fs_client_rpc(client->transport, wiov, 2, riov, 1,
request.header.tag);
if (ret < 0)
{
break;
}
nwrite += response.count;
offset += response.count;
buffer += response.count;
buflen -= response.count;
}
return nwrite ? nwrite : ret;
}
/****************************************************************************
* v9fs_client_fsync
****************************************************************************/
int v9fs_client_fsync(FAR struct v9fs_client_s *client, uint32_t fid)
{
struct v9fs_fsync_s request;
struct v9fs_lerror_s response;
struct iovec wiov[1];
struct iovec riov[1];
/* size[4] Tfsync tag[2] fid[4] datasync[4]
* size[4] Rfsync tag[2]
* 0x01 - Sync data only
* 0x00 - Complete update data (including timestamps and permissions)
*/
request.header.size = V9FS_HDRSZ + V9FS_BIT32SZ * 2;
request.header.type = V9FS_TFSYNC;
request.header.tag = v9fs_get_tagid(client);
request.fid = fid;
request.datasync = 0;
wiov[0].iov_base = &request;
wiov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ * 2;
riov[0].iov_base = &response;
riov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ;
return v9fs_client_rpc(client->transport, wiov, 1, riov, 1,
request.header.tag);
}
/****************************************************************************
* v9fs_client_rename
****************************************************************************/
int v9fs_client_rename(FAR struct v9fs_client_s *client, uint32_t fid,
uint32_t newfid, FAR const char *name)
{
struct v9fs_rename_s request;
struct v9fs_lerror_s response;
struct iovec wiov[1];
struct iovec riov[1];
/* size[4] Trename tag[2] fid[4] dfid[4] name[s]
* size[4] Rrename tag[2]
*/
request.name_len = strlen(name);
request.fid = fid;
request.newfid = newfid;
request.header.size = V9FS_HDRSZ + V9FS_BIT32SZ * 2 + V9FS_BIT16SZ +
request.name_len;
request.header.type = V9FS_TRENAME;
request.header.tag = v9fs_get_tagid(client);
memcpy(&request.buffer, name, request.name_len);
wiov[0].iov_base = &request;
wiov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ * 2 + V9FS_BIT16SZ +
request.name_len;
riov[0].iov_base = &response;
riov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ;
return v9fs_client_rpc(client->transport, wiov, 1, riov, 1,
request.header.tag);
}
/****************************************************************************
* v9fs_client_remove
****************************************************************************/
int v9fs_client_remove(FAR struct v9fs_client_s *client, uint32_t fid)
{
struct v9fs_remove_s request;
struct v9fs_lerror_s response;
struct iovec wiov[1];
struct iovec riov[1];
/* size[4] Tremove tag[2] fid[4]
* size[4] Rremove tag[2]
*/
request.header.size = V9FS_HDRSZ + V9FS_BIT32SZ;
request.header.type = V9FS_TREMOVE;
request.header.tag = v9fs_get_tagid(client);
request.fid = fid;
/* A free buffer is reserved at the time of receipt to handle whether
* there is an error number message
*/
wiov[0].iov_base = &request;
wiov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ;
riov[0].iov_base = &response;
riov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ;
return v9fs_client_rpc(client->transport, wiov, 1, riov, 1,
request.header.tag);
}
/****************************************************************************
* v9fs_client_unlink
****************************************************************************/
int v9fs_client_unlink(FAR struct v9fs_client_s *client, uint32_t fid,
FAR const char *name, bool isdir)
{
struct v9fs_unlink_s request;
struct v9fs_lerror_s response;
struct iovec wiov[1];
struct iovec riov[1];
int flags = isdir ? V9FS_REMOVEDIR : 0;
int ret;
/* size[4] Tunlinkat tag[2] dirfd[4] name[s] flags[4]
* size[4] Runlinkat tag[2]
*/
request.name_len = strlen(name);
request.header.size = V9FS_HDRSZ + V9FS_BIT32SZ * 2 + V9FS_BIT16SZ +
request.name_len;
request.header.type = V9FS_TUNLINKAT;
request.header.tag = v9fs_get_tagid(client);
request.fid = fid;
memcpy(&request.buffer, name, request.name_len);
memcpy(&request.buffer[request.name_len], &flags, V9FS_BIT32SZ);
wiov[0].iov_base = &request;
wiov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ * 2 + V9FS_BIT16SZ +
request.name_len;
riov[0].iov_base = &response;
riov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ;
ret = v9fs_client_rpc(client->transport, wiov, 1, riov, 1,
request.header.tag);
if (ret < 0)
{
return ret;
}
return v9fs_client_clunk(client, fid);
}
/****************************************************************************
* v9fs_client_mkdir
****************************************************************************/
int v9fs_client_mkdir(FAR struct v9fs_client_s *client, uint32_t fid,
FAR const char *name, int mode)
{
struct v9fs_mkdir_s request;
struct v9fs_rmkdir_s response;
struct iovec wiov[1];
struct iovec riov[1];
uint32_t gid = getgid();
off_t offset = 0;
/* size[4] Tmkdir tag[2] dfid[4] name[s] mode[4] gid[4]
* size[4] Rmkdir tag[2] qid[13]
*/
request.fid = fid;
request.name_len = strlen(name);
request.header.size = V9FS_HDRSZ + V9FS_BIT32SZ * 3 + V9FS_BIT16SZ +
request.name_len;
request.header.type = V9FS_TMKDIR;
request.header.tag = v9fs_get_tagid(client);
memcpy(&request.buffer[offset], name, request.name_len);
offset += request.name_len;
memcpy(&request.buffer[offset], &mode, V9FS_BIT32SZ);
offset += V9FS_BIT32SZ;
memcpy(&request.buffer[offset], &gid, V9FS_BIT32SZ);
wiov[0].iov_base = &request;
wiov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ * 3 + V9FS_BIT16SZ +
request.name_len;
riov[0].iov_base = &response;
riov[0].iov_len = V9FS_HDRSZ + V9FS_QIDSZ;
return v9fs_client_rpc(client->transport, wiov, 1, riov, 1,
request.header.tag);
}
/****************************************************************************
* v9fs_client_create
****************************************************************************/
int v9fs_client_create(FAR struct v9fs_client_s *client, uint32_t fid,
FAR const char *name, int oflags, int mode)
{
FAR struct v9fs_fid_s *fidp;
struct v9fs_create_s request;
struct v9fs_rcreate_s response;
struct iovec wiov[1];
struct iovec riov[1];
uint32_t flags = v9fs_map_open_flags(oflags);
uint32_t gid = getgid();
off_t offset = 0;
int ret;
/* size[4] Tlcreate tag[2] fid[4] name[s] flags[4] mode[4] gid[4]
* size[4] Rlcreate tag[2] qid[13] iounit[4]
*/
fidp = idr_find(client->fids, fid);
if (fidp == NULL)
{
return -ENOENT;
}
request.fid = fid;
request.name_len = strlen(name);
request.header.size = V9FS_HDRSZ + V9FS_BIT32SZ * 4 + V9FS_BIT16SZ +
request.name_len;
request.header.type = V9FS_TLCREATE;
request.header.tag = v9fs_get_tagid(client);
memcpy(&request.buffer[offset], name, request.name_len);
offset += request.name_len;
memcpy(&request.buffer[offset], &flags, V9FS_BIT32SZ);
offset += V9FS_BIT32SZ;
memcpy(&request.buffer[offset], &mode, V9FS_BIT32SZ);
offset += V9FS_BIT32SZ;
memcpy(&request.buffer[offset], &gid, V9FS_BIT32SZ);
wiov[0].iov_base = &request;
wiov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ * 4 + V9FS_BIT16SZ +
request.name_len;
riov[0].iov_base = &response;
riov[0].iov_len = V9FS_HDRSZ + V9FS_QIDSZ + V9FS_BIT32SZ;
ret = v9fs_client_rpc(client->transport, wiov, 1, riov, 1,
request.header.tag);
if (ret < 0)
{
return ret;
}
fidp->iounit = response.iounit;
if (!fidp->iounit || fidp->iounit > client->msize - V9FS_IOHDRSZ)
{
fidp->iounit = client->msize - V9FS_IOHDRSZ;
}
return 0;
}
/****************************************************************************
* v9fs_client_open
****************************************************************************/
int v9fs_client_open(FAR struct v9fs_client_s *client,
uint32_t fid, int oflags)
{
FAR struct v9fs_fid_s *fidp;
struct v9fs_open_s request;
struct v9fs_ropen_s response;
struct iovec wiov[1];
struct iovec riov[1];
int ret;
/* size[4] Tlopen tag[2] fid[4] flags[4]
* size[4] Rlopen tag[2] qid[13] iounit[4]
*/
fidp = idr_find(client->fids, fid);
if (fidp == NULL)
{
return -ENOENT;
}
request.fid = fid;
request.flags = v9fs_map_open_flags(oflags);
request.header.size = V9FS_HDRSZ + V9FS_BIT32SZ * 2;
request.header.type = V9FS_TLOPEN;
request.header.tag = v9fs_get_tagid(client);
wiov[0].iov_base = &request;
wiov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ * 2;
riov[0].iov_base = &response;
riov[0].iov_len = V9FS_HDRSZ + V9FS_QIDSZ + V9FS_BIT32SZ;
ret = v9fs_client_rpc(client->transport, wiov, 1, riov, 1,
request.header.tag);
if (ret < 0)
{
return ret;
}
fidp->iounit = response.iounit;
if (!fidp->iounit || fidp->iounit > client->msize - V9FS_IOHDRSZ)
{
fidp->iounit = client->msize - V9FS_IOHDRSZ;
}
return 0;
}
/****************************************************************************
* v9fs_client_getname
****************************************************************************/
int v9fs_client_getname(FAR struct v9fs_client_s *client, uint32_t fid,
FAR char *path)
{
FAR struct v9fs_fid_s *fidp;
nxmutex_lock(&client->lock);
fidp = idr_find(client->fids, fid);
if (fidp == NULL)
{
nxmutex_unlock(&client->lock);
return -ENOENT;
}
strlcat(path, fidp->relpath, PATH_MAX);
nxmutex_unlock(&client->lock);
return 0;
}
/****************************************************************************
* v9fs_client_walk
****************************************************************************/
int v9fs_client_walk(FAR struct v9fs_client_s *client, FAR const char *path,
FAR const char **childname)
{
struct v9fs_walk_s request;
struct v9fs_rwalk_s response;
FAR char *request_payload;
FAR char *response_payload;
FAR const char *start;
FAR const char *end;
struct iovec wiov[2];
struct iovec riov[2];
uint16_t nwname = 0;
uint32_t newfid;
size_t total_len = 0;
size_t offset = 0;
size_t name_len;
int ret;
/* size[4] Twalk tag[2] fid[4] newfid[4] nwname[2] nwname*(wname[s])
* size[4] Rwalk tag[2] nwqid[2] nwqid*(wqid[13])
*/
/* Parse path info, We need to skip parsing the root path */
start = path;
while (*start != '\0')
{
end = strchr(start, '/');
if (end == NULL)
{
if (childname == NULL)
{
nwname++;
total_len += strlen(start);
}
break;
}
else if (end != start)
{
nwname++;
total_len += end - start;
}
start = end + 1;
}
/* Request = sizeof(struct v9fs_walk_s) + nwname * sizeof(uint16_t) +
* total_len
* Response = sizeof(struct v9fs_rwalk_s) + V9FS_QIDSZ * (nwname + 1)
* When PATH_MAX = 255, we support a maximum recursive depth of
* (255 - 7 - 2) / 13 = 18 layers, PATH MAX size affects recursion depth
*/
total_len += V9FS_BIT16SZ * nwname;
if (total_len > PATH_MAX || nwname * V9FS_QIDSZ > PATH_MAX)
{
return -ENAMETOOLONG;
}
request_payload = lib_get_pathbuffer();
if (request_payload == NULL)
{
return -ENOMEM;
}
response_payload = lib_get_pathbuffer();
if (response_payload == NULL)
{
lib_put_pathbuffer(request_payload);
return -ENOMEM;
}
newfid = v9fs_fid_create(client, path);
if (newfid < 0)
{
goto err;
}
request.header.size = V9FS_HDRSZ + V9FS_BIT32SZ * 2 + V9FS_BIT16SZ +
total_len;
request.header.type = V9FS_TWALK;
request.header.tag = v9fs_get_tagid(client);
request.fid = client->root_fid;
request.newfid = newfid;
request.nwname = nwname;
start = path;
while (*start != '\0')
{
end = strchr(start, '/');
if (end == start)
{
start++;
continue;
}
if (end == NULL)
{
if (childname != NULL)
{
*childname = start;
break;
}
name_len = strlen(start);
end = start + name_len - 1;
}
else
{
name_len = end - start;
}
memcpy(&request_payload[offset], &name_len, sizeof(uint16_t));
offset += sizeof(uint16_t);
memcpy(&request_payload[offset], start, name_len);
offset += name_len;
start = end + 1;
}
wiov[0].iov_base = &request;
wiov[0].iov_len = V9FS_HDRSZ + V9FS_BIT32SZ * 2 + V9FS_BIT16SZ;
wiov[1].iov_base = request_payload;
wiov[1].iov_len = total_len;
riov[0].iov_base = &response;
riov[0].iov_len = sizeof(response);
riov[1].iov_base = response_payload;
riov[1].iov_len = V9FS_QIDSZ * (nwname + 1);
ret = v9fs_client_rpc(client->transport, wiov, total_len ? 2 : 1,
riov, 2, request.header.tag);
if (ret < 0)
{
v9fs_fid_destroy(client, newfid);
newfid = ret;
}
err:
lib_put_pathbuffer(request_payload);
lib_put_pathbuffer(response_payload);
return newfid;
}
/****************************************************************************
* v9fs_client_init
****************************************************************************/
int v9fs_client_init(FAR struct v9fs_client_s *client,
FAR const char *data)
{
FAR const char *options;
char transport[NAME_MAX];
char aname[PATH_MAX] =
{
0
};
char uname[NAME_MAX] =
{
0
};
size_t length;
int ret;
/* Parse commandline */
options = data;
while (*options != '\0')
{
FAR const char *sep = strchr(options, ',');
length = sep ? sep - options : strlen(options);
if (strncmp(options, "uname=", 6) == 0)
{
strlcpy(uname, options + 6, length - 5);
}
else if (strncmp(options, "aname=", 6) == 0)
{
strlcpy(aname, options + 6, length - 5);
}
else if (strncmp(options, "trans=", 6) == 0)
{
strlcpy(transport, options + 6, length - 5);
}
else if (strncmp(options, "msize=", 6) == 0)
{
client->msize = atoi(options + 6);
}
options += length + 1;
}
if (client->msize == 0)
{
/* Set default size */
client->msize = (CONFIG_V9FS_DEFAULT_MSIZE + V9FS_IOHDRSZ);
}
/* Initialize the client function */
ret = v9fs_transport_create(&client->transport, transport, data);
if (ret < 0)
{
return ret;
}
client->fids = idr_init_base(1);
if (client->fids == NULL)
{
v9fs_transport_destroy(client->transport);
return -ENOMEM;
}
nxmutex_init(&client->lock);
/* Do Version */
ret = v9fs_client_version(client);
if (ret < 0)
{
goto out;
}
/* Do Attach */
ret = v9fs_client_attach(client, V9FS_NOFID, uname, aname);
if (ret < 0)
{
goto out;
}
client->root_fid = ret;
client->tag_id = 1;
return 0;
out:
v9fs_transport_destroy(client->transport);
nxmutex_destroy(&client->lock);
idr_destroy(client->fids);
return ret;
}
/****************************************************************************
* v9fs_client_uninit
****************************************************************************/
int v9fs_client_uninit(FAR struct v9fs_client_s *client)
{
int ret;
ret = v9fs_client_clunk(client, client->root_fid);
if (ret < 0)
{
return ret;
}
v9fs_transport_destroy(client->transport);
nxmutex_destroy(&client->lock);
idr_destroy(client->fids);
return 0;
}
/****************************************************************************
* v9fs_transport_done
****************************************************************************/
void v9fs_transport_done(FAR struct v9fs_payload_s *cookie, int ret)
{
FAR struct v9fs_lerror_s *error = cookie->riov[0].iov_base;
/* Recive message = riov[0] (Header) + iov[1] (Payload) + ...
* So we first check if the type on the rheader is RLERROR. If it is,
* it means that payload[1] is ecode.
*/
if (error->header.type == V9FS_RLERROR)
{
/* Therefore, we assign the error code to the ecode of the cookie
* and check it in the next process
*/
cookie->ret = -error->ecode;
}
else
{
cookie->ret = ret;
}
nxsem_post(&cookie->resp);
}
/****************************************************************************
* v9fs_fid_put
****************************************************************************/
int v9fs_fid_put(FAR struct v9fs_client_s *client, uint32_t fid)
{
FAR struct v9fs_fid_s *fidp;
nxmutex_lock(&client->lock);
fidp = idr_find(client->fids, fid);
if (fidp == NULL)
{
nxmutex_unlock(&client->lock);
return -ENOENT;
}
fidp->refcount--;
if (fidp->refcount > 0)
{
nxmutex_unlock(&client->lock);
return fidp->refcount;
}
nxmutex_unlock(&client->lock);
return v9fs_client_clunk(client, fid);
}
/****************************************************************************
* v9fs_fid_get
****************************************************************************/
int v9fs_fid_get(FAR struct v9fs_client_s *client, uint32_t fid)
{
FAR struct v9fs_fid_s *fidp;
nxmutex_lock(&client->lock);
fidp = idr_find(client->fids, fid);
if (fidp == NULL)
{
nxmutex_unlock(&client->lock);
return -ENOENT;
}
fidp->refcount++;
nxmutex_unlock(&client->lock);
return 0;
}
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