root / hw / 9pfs / virtio-9p.c @ 0d09e41a
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/*
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* Virtio 9p backend
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*
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* Copyright IBM, Corp. 2010
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#include "hw/virtio/virtio.h" |
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#include "hw/i386/pc.h" |
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#include "qemu/sockets.h" |
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#include "virtio-9p.h" |
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#include "fsdev/qemu-fsdev.h" |
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#include "virtio-9p-xattr.h" |
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#include "virtio-9p-coth.h" |
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#include "trace.h" |
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#include "migration/migration.h" |
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|
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int open_fd_hw;
|
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int total_open_fd;
|
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static int open_fd_rc; |
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|
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enum {
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Oread = 0x00,
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Owrite = 0x01,
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Ordwr = 0x02,
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Oexec = 0x03,
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Oexcl = 0x04,
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Otrunc = 0x10,
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Orexec = 0x20,
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Orclose = 0x40,
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Oappend = 0x80,
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}; |
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|
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static int omode_to_uflags(int8_t mode) |
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{
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int ret = 0; |
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|
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switch (mode & 3) { |
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case Oread:
|
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ret = O_RDONLY; |
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break;
|
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case Ordwr:
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ret = O_RDWR; |
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break;
|
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case Owrite:
|
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ret = O_WRONLY; |
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break;
|
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case Oexec:
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ret = O_RDONLY; |
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break;
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} |
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|
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if (mode & Otrunc) {
|
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ret |= O_TRUNC; |
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} |
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|
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if (mode & Oappend) {
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ret |= O_APPEND; |
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} |
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|
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if (mode & Oexcl) {
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ret |= O_EXCL; |
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} |
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|
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return ret;
|
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} |
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|
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struct dotl_openflag_map {
|
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int dotl_flag;
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int open_flag;
|
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}; |
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|
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static int dotl_to_open_flags(int flags) |
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{
|
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int i;
|
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/*
|
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* We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY
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* and P9_DOTL_NOACCESS
|
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*/
|
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int oflags = flags & O_ACCMODE;
|
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|
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struct dotl_openflag_map dotl_oflag_map[] = {
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{ P9_DOTL_CREATE, O_CREAT },
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{ P9_DOTL_EXCL, O_EXCL },
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{ P9_DOTL_NOCTTY , O_NOCTTY },
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{ P9_DOTL_TRUNC, O_TRUNC },
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{ P9_DOTL_APPEND, O_APPEND },
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{ P9_DOTL_NONBLOCK, O_NONBLOCK } ,
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{ P9_DOTL_DSYNC, O_DSYNC },
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{ P9_DOTL_FASYNC, FASYNC },
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{ P9_DOTL_DIRECT, O_DIRECT },
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{ P9_DOTL_LARGEFILE, O_LARGEFILE },
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{ P9_DOTL_DIRECTORY, O_DIRECTORY },
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{ P9_DOTL_NOFOLLOW, O_NOFOLLOW },
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{ P9_DOTL_NOATIME, O_NOATIME },
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{ P9_DOTL_SYNC, O_SYNC },
|
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}; |
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|
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for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) { |
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if (flags & dotl_oflag_map[i].dotl_flag) {
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oflags |= dotl_oflag_map[i].open_flag; |
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} |
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} |
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return oflags;
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} |
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|
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void cred_init(FsCred *credp)
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{
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credp->fc_uid = -1;
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credp->fc_gid = -1;
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credp->fc_mode = -1;
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credp->fc_rdev = -1;
|
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} |
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|
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static int get_dotl_openflags(V9fsState *s, int oflags) |
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{
|
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int flags;
|
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/*
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* Filter the client open flags
|
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*/
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flags = dotl_to_open_flags(oflags); |
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flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); |
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/*
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* Ignore direct disk access hint until the server supports it.
|
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*/
|
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flags &= ~O_DIRECT; |
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return flags;
|
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} |
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|
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void v9fs_path_init(V9fsPath *path)
|
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{
|
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path->data = NULL;
|
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path->size = 0;
|
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} |
| 142 |
|
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void v9fs_path_free(V9fsPath *path)
|
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{
|
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g_free(path->data); |
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path->data = NULL;
|
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path->size = 0;
|
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} |
| 149 |
|
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void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs)
|
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{
|
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v9fs_path_free(lhs); |
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lhs->data = g_malloc(rhs->size); |
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memcpy(lhs->data, rhs->data, rhs->size); |
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lhs->size = rhs->size; |
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} |
| 157 |
|
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int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath,
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const char *name, V9fsPath *path) |
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{
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int err;
|
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err = s->ops->name_to_path(&s->ctx, dirpath, name, path); |
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if (err < 0) { |
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err = -errno; |
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} |
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return err;
|
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} |
| 168 |
|
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/*
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* Return TRUE if s1 is an ancestor of s2.
|
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*
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* E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d".
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* As a special case, We treat s1 as ancestor of s2 if they are same!
|
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*/
|
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static int v9fs_path_is_ancestor(V9fsPath *s1, V9fsPath *s2) |
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{
|
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if (!strncmp(s1->data, s2->data, s1->size - 1)) { |
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if (s2->data[s1->size - 1] == '\0' || s2->data[s1->size - 1] == '/') { |
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return 1; |
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} |
| 181 |
} |
| 182 |
return 0; |
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} |
| 184 |
|
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static size_t v9fs_string_size(V9fsString *str)
|
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{
|
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return str->size;
|
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} |
| 189 |
|
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/*
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* returns 0 if fid got re-opened, 1 if not, < 0 on error */
|
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static int v9fs_reopen_fid(V9fsPDU *pdu, V9fsFidState *f) |
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{
|
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int err = 1; |
| 195 |
if (f->fid_type == P9_FID_FILE) {
|
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if (f->fs.fd == -1) { |
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do {
|
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err = v9fs_co_open(pdu, f, f->open_flags); |
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} while (err == -EINTR && !pdu->cancelled);
|
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} |
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} else if (f->fid_type == P9_FID_DIR) { |
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if (f->fs.dir == NULL) { |
| 203 |
do {
|
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err = v9fs_co_opendir(pdu, f); |
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} while (err == -EINTR && !pdu->cancelled);
|
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} |
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} |
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return err;
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} |
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|
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static V9fsFidState *get_fid(V9fsPDU *pdu, int32_t fid)
|
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{
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int err;
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V9fsFidState *f; |
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V9fsState *s = pdu->s; |
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|
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for (f = s->fid_list; f; f = f->next) {
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BUG_ON(f->clunked); |
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if (f->fid == fid) {
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/*
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* Update the fid ref upfront so that
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* we don't get reclaimed when we yield
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* in open later.
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*/
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f->ref++; |
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/*
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* check whether we need to reopen the
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* file. We might have closed the fd
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* while trying to free up some file
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* descriptors.
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*/
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err = v9fs_reopen_fid(pdu, f); |
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if (err < 0) { |
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f->ref--; |
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return NULL; |
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} |
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/*
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* Mark the fid as referenced so that the LRU
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* reclaim won't close the file descriptor
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*/
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f->flags |= FID_REFERENCED; |
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return f;
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} |
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} |
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return NULL; |
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} |
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|
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static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid)
|
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{
|
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V9fsFidState *f; |
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|
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for (f = s->fid_list; f; f = f->next) {
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/* If fid is already there return NULL */
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BUG_ON(f->clunked); |
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if (f->fid == fid) {
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return NULL; |
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} |
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} |
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f = g_malloc0(sizeof(V9fsFidState));
|
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f->fid = fid; |
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f->fid_type = P9_FID_NONE; |
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f->ref = 1;
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/*
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* Mark the fid as referenced so that the LRU
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* reclaim won't close the file descriptor
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*/
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f->flags |= FID_REFERENCED; |
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f->next = s->fid_list; |
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s->fid_list = f; |
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|
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return f;
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} |
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|
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static int v9fs_xattr_fid_clunk(V9fsPDU *pdu, V9fsFidState *fidp) |
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{
|
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int retval = 0; |
| 277 |
|
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if (fidp->fs.xattr.copied_len == -1) { |
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/* getxattr/listxattr fid */
|
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goto free_value;
|
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} |
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/*
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* if this is fid for setxattr. clunk should
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* result in setxattr localcall
|
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*/
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if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) {
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/* clunk after partial write */
|
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retval = -EINVAL; |
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goto free_out;
|
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} |
| 291 |
if (fidp->fs.xattr.len) {
|
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retval = v9fs_co_lsetxattr(pdu, &fidp->path, &fidp->fs.xattr.name, |
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fidp->fs.xattr.value, |
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fidp->fs.xattr.len, |
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fidp->fs.xattr.flags); |
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} else {
|
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retval = v9fs_co_lremovexattr(pdu, &fidp->path, &fidp->fs.xattr.name); |
| 298 |
} |
| 299 |
free_out:
|
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v9fs_string_free(&fidp->fs.xattr.name); |
| 301 |
free_value:
|
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if (fidp->fs.xattr.value) {
|
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g_free(fidp->fs.xattr.value); |
| 304 |
} |
| 305 |
return retval;
|
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} |
| 307 |
|
| 308 |
static int free_fid(V9fsPDU *pdu, V9fsFidState *fidp) |
| 309 |
{
|
| 310 |
int retval = 0; |
| 311 |
|
| 312 |
if (fidp->fid_type == P9_FID_FILE) {
|
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/* If we reclaimed the fd no need to close */
|
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if (fidp->fs.fd != -1) { |
| 315 |
retval = v9fs_co_close(pdu, &fidp->fs); |
| 316 |
} |
| 317 |
} else if (fidp->fid_type == P9_FID_DIR) { |
| 318 |
if (fidp->fs.dir != NULL) { |
| 319 |
retval = v9fs_co_closedir(pdu, &fidp->fs); |
| 320 |
} |
| 321 |
} else if (fidp->fid_type == P9_FID_XATTR) { |
| 322 |
retval = v9fs_xattr_fid_clunk(pdu, fidp); |
| 323 |
} |
| 324 |
v9fs_path_free(&fidp->path); |
| 325 |
g_free(fidp); |
| 326 |
return retval;
|
| 327 |
} |
| 328 |
|
| 329 |
static int put_fid(V9fsPDU *pdu, V9fsFidState *fidp) |
| 330 |
{
|
| 331 |
BUG_ON(!fidp->ref); |
| 332 |
fidp->ref--; |
| 333 |
/*
|
| 334 |
* Don't free the fid if it is in reclaim list
|
| 335 |
*/
|
| 336 |
if (!fidp->ref && fidp->clunked) {
|
| 337 |
if (fidp->fid == pdu->s->root_fid) {
|
| 338 |
/*
|
| 339 |
* if the clunked fid is root fid then we
|
| 340 |
* have unmounted the fs on the client side.
|
| 341 |
* delete the migration blocker. Ideally, this
|
| 342 |
* should be hooked to transport close notification
|
| 343 |
*/
|
| 344 |
if (pdu->s->migration_blocker) {
|
| 345 |
migrate_del_blocker(pdu->s->migration_blocker); |
| 346 |
error_free(pdu->s->migration_blocker); |
| 347 |
pdu->s->migration_blocker = NULL;
|
| 348 |
} |
| 349 |
} |
| 350 |
return free_fid(pdu, fidp);
|
| 351 |
} |
| 352 |
return 0; |
| 353 |
} |
| 354 |
|
| 355 |
static V9fsFidState *clunk_fid(V9fsState *s, int32_t fid)
|
| 356 |
{
|
| 357 |
V9fsFidState **fidpp, *fidp; |
| 358 |
|
| 359 |
for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) {
|
| 360 |
if ((*fidpp)->fid == fid) {
|
| 361 |
break;
|
| 362 |
} |
| 363 |
} |
| 364 |
if (*fidpp == NULL) { |
| 365 |
return NULL; |
| 366 |
} |
| 367 |
fidp = *fidpp; |
| 368 |
*fidpp = fidp->next; |
| 369 |
fidp->clunked = 1;
|
| 370 |
return fidp;
|
| 371 |
} |
| 372 |
|
| 373 |
void v9fs_reclaim_fd(V9fsPDU *pdu)
|
| 374 |
{
|
| 375 |
int reclaim_count = 0; |
| 376 |
V9fsState *s = pdu->s; |
| 377 |
V9fsFidState *f, *reclaim_list = NULL;
|
| 378 |
|
| 379 |
for (f = s->fid_list; f; f = f->next) {
|
| 380 |
/*
|
| 381 |
* Unlink fids cannot be reclaimed. Check
|
| 382 |
* for them and skip them. Also skip fids
|
| 383 |
* currently being operated on.
|
| 384 |
*/
|
| 385 |
if (f->ref || f->flags & FID_NON_RECLAIMABLE) {
|
| 386 |
continue;
|
| 387 |
} |
| 388 |
/*
|
| 389 |
* if it is a recently referenced fid
|
| 390 |
* we leave the fid untouched and clear the
|
| 391 |
* reference bit. We come back to it later
|
| 392 |
* in the next iteration. (a simple LRU without
|
| 393 |
* moving list elements around)
|
| 394 |
*/
|
| 395 |
if (f->flags & FID_REFERENCED) {
|
| 396 |
f->flags &= ~FID_REFERENCED; |
| 397 |
continue;
|
| 398 |
} |
| 399 |
/*
|
| 400 |
* Add fids to reclaim list.
|
| 401 |
*/
|
| 402 |
if (f->fid_type == P9_FID_FILE) {
|
| 403 |
if (f->fs.fd != -1) { |
| 404 |
/*
|
| 405 |
* Up the reference count so that
|
| 406 |
* a clunk request won't free this fid
|
| 407 |
*/
|
| 408 |
f->ref++; |
| 409 |
f->rclm_lst = reclaim_list; |
| 410 |
reclaim_list = f; |
| 411 |
f->fs_reclaim.fd = f->fs.fd; |
| 412 |
f->fs.fd = -1;
|
| 413 |
reclaim_count++; |
| 414 |
} |
| 415 |
} else if (f->fid_type == P9_FID_DIR) { |
| 416 |
if (f->fs.dir != NULL) { |
| 417 |
/*
|
| 418 |
* Up the reference count so that
|
| 419 |
* a clunk request won't free this fid
|
| 420 |
*/
|
| 421 |
f->ref++; |
| 422 |
f->rclm_lst = reclaim_list; |
| 423 |
reclaim_list = f; |
| 424 |
f->fs_reclaim.dir = f->fs.dir; |
| 425 |
f->fs.dir = NULL;
|
| 426 |
reclaim_count++; |
| 427 |
} |
| 428 |
} |
| 429 |
if (reclaim_count >= open_fd_rc) {
|
| 430 |
break;
|
| 431 |
} |
| 432 |
} |
| 433 |
/*
|
| 434 |
* Now close the fid in reclaim list. Free them if they
|
| 435 |
* are already clunked.
|
| 436 |
*/
|
| 437 |
while (reclaim_list) {
|
| 438 |
f = reclaim_list; |
| 439 |
reclaim_list = f->rclm_lst; |
| 440 |
if (f->fid_type == P9_FID_FILE) {
|
| 441 |
v9fs_co_close(pdu, &f->fs_reclaim); |
| 442 |
} else if (f->fid_type == P9_FID_DIR) { |
| 443 |
v9fs_co_closedir(pdu, &f->fs_reclaim); |
| 444 |
} |
| 445 |
f->rclm_lst = NULL;
|
| 446 |
/*
|
| 447 |
* Now drop the fid reference, free it
|
| 448 |
* if clunked.
|
| 449 |
*/
|
| 450 |
put_fid(pdu, f); |
| 451 |
} |
| 452 |
} |
| 453 |
|
| 454 |
static int v9fs_mark_fids_unreclaim(V9fsPDU *pdu, V9fsPath *path) |
| 455 |
{
|
| 456 |
int err;
|
| 457 |
V9fsState *s = pdu->s; |
| 458 |
V9fsFidState *fidp, head_fid; |
| 459 |
|
| 460 |
head_fid.next = s->fid_list; |
| 461 |
for (fidp = s->fid_list; fidp; fidp = fidp->next) {
|
| 462 |
if (fidp->path.size != path->size) {
|
| 463 |
continue;
|
| 464 |
} |
| 465 |
if (!memcmp(fidp->path.data, path->data, path->size)) {
|
| 466 |
/* Mark the fid non reclaimable. */
|
| 467 |
fidp->flags |= FID_NON_RECLAIMABLE; |
| 468 |
|
| 469 |
/* reopen the file/dir if already closed */
|
| 470 |
err = v9fs_reopen_fid(pdu, fidp); |
| 471 |
if (err < 0) { |
| 472 |
return -1; |
| 473 |
} |
| 474 |
/*
|
| 475 |
* Go back to head of fid list because
|
| 476 |
* the list could have got updated when
|
| 477 |
* switched to the worker thread
|
| 478 |
*/
|
| 479 |
if (err == 0) { |
| 480 |
fidp = &head_fid; |
| 481 |
} |
| 482 |
} |
| 483 |
} |
| 484 |
return 0; |
| 485 |
} |
| 486 |
|
| 487 |
static void virtfs_reset(V9fsPDU *pdu) |
| 488 |
{
|
| 489 |
V9fsState *s = pdu->s; |
| 490 |
V9fsFidState *fidp = NULL;
|
| 491 |
|
| 492 |
/* Free all fids */
|
| 493 |
while (s->fid_list) {
|
| 494 |
fidp = s->fid_list; |
| 495 |
s->fid_list = fidp->next; |
| 496 |
|
| 497 |
if (fidp->ref) {
|
| 498 |
fidp->clunked = 1;
|
| 499 |
} else {
|
| 500 |
free_fid(pdu, fidp); |
| 501 |
} |
| 502 |
} |
| 503 |
if (fidp) {
|
| 504 |
/* One or more unclunked fids found... */
|
| 505 |
error_report("9pfs:%s: One or more uncluncked fids "
|
| 506 |
"found during reset", __func__);
|
| 507 |
} |
| 508 |
} |
| 509 |
|
| 510 |
#define P9_QID_TYPE_DIR 0x80 |
| 511 |
#define P9_QID_TYPE_SYMLINK 0x02 |
| 512 |
|
| 513 |
#define P9_STAT_MODE_DIR 0x80000000 |
| 514 |
#define P9_STAT_MODE_APPEND 0x40000000 |
| 515 |
#define P9_STAT_MODE_EXCL 0x20000000 |
| 516 |
#define P9_STAT_MODE_MOUNT 0x10000000 |
| 517 |
#define P9_STAT_MODE_AUTH 0x08000000 |
| 518 |
#define P9_STAT_MODE_TMP 0x04000000 |
| 519 |
#define P9_STAT_MODE_SYMLINK 0x02000000 |
| 520 |
#define P9_STAT_MODE_LINK 0x01000000 |
| 521 |
#define P9_STAT_MODE_DEVICE 0x00800000 |
| 522 |
#define P9_STAT_MODE_NAMED_PIPE 0x00200000 |
| 523 |
#define P9_STAT_MODE_SOCKET 0x00100000 |
| 524 |
#define P9_STAT_MODE_SETUID 0x00080000 |
| 525 |
#define P9_STAT_MODE_SETGID 0x00040000 |
| 526 |
#define P9_STAT_MODE_SETVTX 0x00010000 |
| 527 |
|
| 528 |
#define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
|
| 529 |
P9_STAT_MODE_SYMLINK | \ |
| 530 |
P9_STAT_MODE_LINK | \ |
| 531 |
P9_STAT_MODE_DEVICE | \ |
| 532 |
P9_STAT_MODE_NAMED_PIPE | \ |
| 533 |
P9_STAT_MODE_SOCKET) |
| 534 |
|
| 535 |
/* This is the algorithm from ufs in spfs */
|
| 536 |
static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) |
| 537 |
{
|
| 538 |
size_t size; |
| 539 |
|
| 540 |
memset(&qidp->path, 0, sizeof(qidp->path)); |
| 541 |
size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); |
| 542 |
memcpy(&qidp->path, &stbuf->st_ino, size); |
| 543 |
qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
|
| 544 |
qidp->type = 0;
|
| 545 |
if (S_ISDIR(stbuf->st_mode)) {
|
| 546 |
qidp->type |= P9_QID_TYPE_DIR; |
| 547 |
} |
| 548 |
if (S_ISLNK(stbuf->st_mode)) {
|
| 549 |
qidp->type |= P9_QID_TYPE_SYMLINK; |
| 550 |
} |
| 551 |
} |
| 552 |
|
| 553 |
static int fid_to_qid(V9fsPDU *pdu, V9fsFidState *fidp, V9fsQID *qidp) |
| 554 |
{
|
| 555 |
struct stat stbuf;
|
| 556 |
int err;
|
| 557 |
|
| 558 |
err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
| 559 |
if (err < 0) { |
| 560 |
return err;
|
| 561 |
} |
| 562 |
stat_to_qid(&stbuf, qidp); |
| 563 |
return 0; |
| 564 |
} |
| 565 |
|
| 566 |
static V9fsPDU *alloc_pdu(V9fsState *s)
|
| 567 |
{
|
| 568 |
V9fsPDU *pdu = NULL;
|
| 569 |
|
| 570 |
if (!QLIST_EMPTY(&s->free_list)) {
|
| 571 |
pdu = QLIST_FIRST(&s->free_list); |
| 572 |
QLIST_REMOVE(pdu, next); |
| 573 |
QLIST_INSERT_HEAD(&s->active_list, pdu, next); |
| 574 |
} |
| 575 |
return pdu;
|
| 576 |
} |
| 577 |
|
| 578 |
static void free_pdu(V9fsState *s, V9fsPDU *pdu) |
| 579 |
{
|
| 580 |
if (pdu) {
|
| 581 |
/*
|
| 582 |
* Cancelled pdu are added back to the freelist
|
| 583 |
* by flush request .
|
| 584 |
*/
|
| 585 |
if (!pdu->cancelled) {
|
| 586 |
QLIST_REMOVE(pdu, next); |
| 587 |
QLIST_INSERT_HEAD(&s->free_list, pdu, next); |
| 588 |
} |
| 589 |
} |
| 590 |
} |
| 591 |
|
| 592 |
/*
|
| 593 |
* We don't do error checking for pdu_marshal/unmarshal here
|
| 594 |
* because we always expect to have enough space to encode
|
| 595 |
* error details
|
| 596 |
*/
|
| 597 |
static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) |
| 598 |
{
|
| 599 |
int8_t id = pdu->id + 1; /* Response */ |
| 600 |
|
| 601 |
if (len < 0) { |
| 602 |
int err = -len;
|
| 603 |
len = 7;
|
| 604 |
|
| 605 |
if (s->proto_version != V9FS_PROTO_2000L) {
|
| 606 |
V9fsString str; |
| 607 |
|
| 608 |
str.data = strerror(err); |
| 609 |
str.size = strlen(str.data); |
| 610 |
|
| 611 |
len += pdu_marshal(pdu, len, "s", &str);
|
| 612 |
id = P9_RERROR; |
| 613 |
} |
| 614 |
|
| 615 |
len += pdu_marshal(pdu, len, "d", err);
|
| 616 |
|
| 617 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
| 618 |
id = P9_RLERROR; |
| 619 |
} |
| 620 |
trace_v9fs_rerror(pdu->tag, pdu->id, err); /* Trace ERROR */
|
| 621 |
} |
| 622 |
|
| 623 |
/* fill out the header */
|
| 624 |
pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); |
| 625 |
|
| 626 |
/* keep these in sync */
|
| 627 |
pdu->size = len; |
| 628 |
pdu->id = id; |
| 629 |
|
| 630 |
/* push onto queue and notify */
|
| 631 |
virtqueue_push(s->vq, &pdu->elem, len); |
| 632 |
|
| 633 |
/* FIXME: we should batch these completions */
|
| 634 |
virtio_notify(&s->vdev, s->vq); |
| 635 |
|
| 636 |
/* Now wakeup anybody waiting in flush for this request */
|
| 637 |
qemu_co_queue_next(&pdu->complete); |
| 638 |
|
| 639 |
free_pdu(s, pdu); |
| 640 |
} |
| 641 |
|
| 642 |
static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension)
|
| 643 |
{
|
| 644 |
mode_t ret; |
| 645 |
|
| 646 |
ret = mode & 0777;
|
| 647 |
if (mode & P9_STAT_MODE_DIR) {
|
| 648 |
ret |= S_IFDIR; |
| 649 |
} |
| 650 |
|
| 651 |
if (mode & P9_STAT_MODE_SYMLINK) {
|
| 652 |
ret |= S_IFLNK; |
| 653 |
} |
| 654 |
if (mode & P9_STAT_MODE_SOCKET) {
|
| 655 |
ret |= S_IFSOCK; |
| 656 |
} |
| 657 |
if (mode & P9_STAT_MODE_NAMED_PIPE) {
|
| 658 |
ret |= S_IFIFO; |
| 659 |
} |
| 660 |
if (mode & P9_STAT_MODE_DEVICE) {
|
| 661 |
if (extension && extension->data[0] == 'c') { |
| 662 |
ret |= S_IFCHR; |
| 663 |
} else {
|
| 664 |
ret |= S_IFBLK; |
| 665 |
} |
| 666 |
} |
| 667 |
|
| 668 |
if (!(ret&~0777)) { |
| 669 |
ret |= S_IFREG; |
| 670 |
} |
| 671 |
|
| 672 |
if (mode & P9_STAT_MODE_SETUID) {
|
| 673 |
ret |= S_ISUID; |
| 674 |
} |
| 675 |
if (mode & P9_STAT_MODE_SETGID) {
|
| 676 |
ret |= S_ISGID; |
| 677 |
} |
| 678 |
if (mode & P9_STAT_MODE_SETVTX) {
|
| 679 |
ret |= S_ISVTX; |
| 680 |
} |
| 681 |
|
| 682 |
return ret;
|
| 683 |
} |
| 684 |
|
| 685 |
static int donttouch_stat(V9fsStat *stat) |
| 686 |
{
|
| 687 |
if (stat->type == -1 && |
| 688 |
stat->dev == -1 &&
|
| 689 |
stat->qid.type == -1 &&
|
| 690 |
stat->qid.version == -1 &&
|
| 691 |
stat->qid.path == -1 &&
|
| 692 |
stat->mode == -1 &&
|
| 693 |
stat->atime == -1 &&
|
| 694 |
stat->mtime == -1 &&
|
| 695 |
stat->length == -1 &&
|
| 696 |
!stat->name.size && |
| 697 |
!stat->uid.size && |
| 698 |
!stat->gid.size && |
| 699 |
!stat->muid.size && |
| 700 |
stat->n_uid == -1 &&
|
| 701 |
stat->n_gid == -1 &&
|
| 702 |
stat->n_muid == -1) {
|
| 703 |
return 1; |
| 704 |
} |
| 705 |
|
| 706 |
return 0; |
| 707 |
} |
| 708 |
|
| 709 |
static void v9fs_stat_init(V9fsStat *stat) |
| 710 |
{
|
| 711 |
v9fs_string_init(&stat->name); |
| 712 |
v9fs_string_init(&stat->uid); |
| 713 |
v9fs_string_init(&stat->gid); |
| 714 |
v9fs_string_init(&stat->muid); |
| 715 |
v9fs_string_init(&stat->extension); |
| 716 |
} |
| 717 |
|
| 718 |
static void v9fs_stat_free(V9fsStat *stat) |
| 719 |
{
|
| 720 |
v9fs_string_free(&stat->name); |
| 721 |
v9fs_string_free(&stat->uid); |
| 722 |
v9fs_string_free(&stat->gid); |
| 723 |
v9fs_string_free(&stat->muid); |
| 724 |
v9fs_string_free(&stat->extension); |
| 725 |
} |
| 726 |
|
| 727 |
static uint32_t stat_to_v9mode(const struct stat *stbuf) |
| 728 |
{
|
| 729 |
uint32_t mode; |
| 730 |
|
| 731 |
mode = stbuf->st_mode & 0777;
|
| 732 |
if (S_ISDIR(stbuf->st_mode)) {
|
| 733 |
mode |= P9_STAT_MODE_DIR; |
| 734 |
} |
| 735 |
|
| 736 |
if (S_ISLNK(stbuf->st_mode)) {
|
| 737 |
mode |= P9_STAT_MODE_SYMLINK; |
| 738 |
} |
| 739 |
|
| 740 |
if (S_ISSOCK(stbuf->st_mode)) {
|
| 741 |
mode |= P9_STAT_MODE_SOCKET; |
| 742 |
} |
| 743 |
|
| 744 |
if (S_ISFIFO(stbuf->st_mode)) {
|
| 745 |
mode |= P9_STAT_MODE_NAMED_PIPE; |
| 746 |
} |
| 747 |
|
| 748 |
if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) {
|
| 749 |
mode |= P9_STAT_MODE_DEVICE; |
| 750 |
} |
| 751 |
|
| 752 |
if (stbuf->st_mode & S_ISUID) {
|
| 753 |
mode |= P9_STAT_MODE_SETUID; |
| 754 |
} |
| 755 |
|
| 756 |
if (stbuf->st_mode & S_ISGID) {
|
| 757 |
mode |= P9_STAT_MODE_SETGID; |
| 758 |
} |
| 759 |
|
| 760 |
if (stbuf->st_mode & S_ISVTX) {
|
| 761 |
mode |= P9_STAT_MODE_SETVTX; |
| 762 |
} |
| 763 |
|
| 764 |
return mode;
|
| 765 |
} |
| 766 |
|
| 767 |
static int stat_to_v9stat(V9fsPDU *pdu, V9fsPath *name, |
| 768 |
const struct stat *stbuf, |
| 769 |
V9fsStat *v9stat) |
| 770 |
{
|
| 771 |
int err;
|
| 772 |
const char *str; |
| 773 |
|
| 774 |
memset(v9stat, 0, sizeof(*v9stat)); |
| 775 |
|
| 776 |
stat_to_qid(stbuf, &v9stat->qid); |
| 777 |
v9stat->mode = stat_to_v9mode(stbuf); |
| 778 |
v9stat->atime = stbuf->st_atime; |
| 779 |
v9stat->mtime = stbuf->st_mtime; |
| 780 |
v9stat->length = stbuf->st_size; |
| 781 |
|
| 782 |
v9fs_string_null(&v9stat->uid); |
| 783 |
v9fs_string_null(&v9stat->gid); |
| 784 |
v9fs_string_null(&v9stat->muid); |
| 785 |
|
| 786 |
v9stat->n_uid = stbuf->st_uid; |
| 787 |
v9stat->n_gid = stbuf->st_gid; |
| 788 |
v9stat->n_muid = 0;
|
| 789 |
|
| 790 |
v9fs_string_null(&v9stat->extension); |
| 791 |
|
| 792 |
if (v9stat->mode & P9_STAT_MODE_SYMLINK) {
|
| 793 |
err = v9fs_co_readlink(pdu, name, &v9stat->extension); |
| 794 |
if (err < 0) { |
| 795 |
return err;
|
| 796 |
} |
| 797 |
} else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
| 798 |
v9fs_string_sprintf(&v9stat->extension, "%c %u %u",
|
| 799 |
S_ISCHR(stbuf->st_mode) ? 'c' : 'b', |
| 800 |
major(stbuf->st_rdev), minor(stbuf->st_rdev)); |
| 801 |
} else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { |
| 802 |
v9fs_string_sprintf(&v9stat->extension, "%s %lu",
|
| 803 |
"HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); |
| 804 |
} |
| 805 |
|
| 806 |
str = strrchr(name->data, '/');
|
| 807 |
if (str) {
|
| 808 |
str += 1;
|
| 809 |
} else {
|
| 810 |
str = name->data; |
| 811 |
} |
| 812 |
|
| 813 |
v9fs_string_sprintf(&v9stat->name, "%s", str);
|
| 814 |
|
| 815 |
v9stat->size = 61 +
|
| 816 |
v9fs_string_size(&v9stat->name) + |
| 817 |
v9fs_string_size(&v9stat->uid) + |
| 818 |
v9fs_string_size(&v9stat->gid) + |
| 819 |
v9fs_string_size(&v9stat->muid) + |
| 820 |
v9fs_string_size(&v9stat->extension); |
| 821 |
return 0; |
| 822 |
} |
| 823 |
|
| 824 |
#define P9_STATS_MODE 0x00000001ULL |
| 825 |
#define P9_STATS_NLINK 0x00000002ULL |
| 826 |
#define P9_STATS_UID 0x00000004ULL |
| 827 |
#define P9_STATS_GID 0x00000008ULL |
| 828 |
#define P9_STATS_RDEV 0x00000010ULL |
| 829 |
#define P9_STATS_ATIME 0x00000020ULL |
| 830 |
#define P9_STATS_MTIME 0x00000040ULL |
| 831 |
#define P9_STATS_CTIME 0x00000080ULL |
| 832 |
#define P9_STATS_INO 0x00000100ULL |
| 833 |
#define P9_STATS_SIZE 0x00000200ULL |
| 834 |
#define P9_STATS_BLOCKS 0x00000400ULL |
| 835 |
|
| 836 |
#define P9_STATS_BTIME 0x00000800ULL |
| 837 |
#define P9_STATS_GEN 0x00001000ULL |
| 838 |
#define P9_STATS_DATA_VERSION 0x00002000ULL |
| 839 |
|
| 840 |
#define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ |
| 841 |
#define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ |
| 842 |
|
| 843 |
|
| 844 |
static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, |
| 845 |
V9fsStatDotl *v9lstat) |
| 846 |
{
|
| 847 |
memset(v9lstat, 0, sizeof(*v9lstat)); |
| 848 |
|
| 849 |
v9lstat->st_mode = stbuf->st_mode; |
| 850 |
v9lstat->st_nlink = stbuf->st_nlink; |
| 851 |
v9lstat->st_uid = stbuf->st_uid; |
| 852 |
v9lstat->st_gid = stbuf->st_gid; |
| 853 |
v9lstat->st_rdev = stbuf->st_rdev; |
| 854 |
v9lstat->st_size = stbuf->st_size; |
| 855 |
v9lstat->st_blksize = stbuf->st_blksize; |
| 856 |
v9lstat->st_blocks = stbuf->st_blocks; |
| 857 |
v9lstat->st_atime_sec = stbuf->st_atime; |
| 858 |
v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; |
| 859 |
v9lstat->st_mtime_sec = stbuf->st_mtime; |
| 860 |
v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; |
| 861 |
v9lstat->st_ctime_sec = stbuf->st_ctime; |
| 862 |
v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; |
| 863 |
/* Currently we only support BASIC fields in stat */
|
| 864 |
v9lstat->st_result_mask = P9_STATS_BASIC; |
| 865 |
|
| 866 |
stat_to_qid(stbuf, &v9lstat->qid); |
| 867 |
} |
| 868 |
|
| 869 |
static void print_sg(struct iovec *sg, int cnt) |
| 870 |
{
|
| 871 |
int i;
|
| 872 |
|
| 873 |
printf("sg[%d]: {", cnt);
|
| 874 |
for (i = 0; i < cnt; i++) { |
| 875 |
if (i) {
|
| 876 |
printf(", ");
|
| 877 |
} |
| 878 |
printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len);
|
| 879 |
} |
| 880 |
printf("}\n");
|
| 881 |
} |
| 882 |
|
| 883 |
/* Will call this only for path name based fid */
|
| 884 |
static void v9fs_fix_path(V9fsPath *dst, V9fsPath *src, int len) |
| 885 |
{
|
| 886 |
V9fsPath str; |
| 887 |
v9fs_path_init(&str); |
| 888 |
v9fs_path_copy(&str, dst); |
| 889 |
v9fs_string_sprintf((V9fsString *)dst, "%s%s", src->data, str.data+len);
|
| 890 |
v9fs_path_free(&str); |
| 891 |
/* +1 to include terminating NULL */
|
| 892 |
dst->size++; |
| 893 |
} |
| 894 |
|
| 895 |
static inline bool is_ro_export(FsContext *ctx) |
| 896 |
{
|
| 897 |
return ctx->export_flags & V9FS_RDONLY;
|
| 898 |
} |
| 899 |
|
| 900 |
static void v9fs_version(void *opaque) |
| 901 |
{
|
| 902 |
ssize_t err; |
| 903 |
V9fsPDU *pdu = opaque; |
| 904 |
V9fsState *s = pdu->s; |
| 905 |
V9fsString version; |
| 906 |
size_t offset = 7;
|
| 907 |
|
| 908 |
v9fs_string_init(&version); |
| 909 |
err = pdu_unmarshal(pdu, offset, "ds", &s->msize, &version);
|
| 910 |
if (err < 0) { |
| 911 |
offset = err; |
| 912 |
goto out;
|
| 913 |
} |
| 914 |
trace_v9fs_version(pdu->tag, pdu->id, s->msize, version.data); |
| 915 |
|
| 916 |
virtfs_reset(pdu); |
| 917 |
|
| 918 |
if (!strcmp(version.data, "9P2000.u")) { |
| 919 |
s->proto_version = V9FS_PROTO_2000U; |
| 920 |
} else if (!strcmp(version.data, "9P2000.L")) { |
| 921 |
s->proto_version = V9FS_PROTO_2000L; |
| 922 |
} else {
|
| 923 |
v9fs_string_sprintf(&version, "unknown");
|
| 924 |
} |
| 925 |
|
| 926 |
err = pdu_marshal(pdu, offset, "ds", s->msize, &version);
|
| 927 |
if (err < 0) { |
| 928 |
offset = err; |
| 929 |
goto out;
|
| 930 |
} |
| 931 |
offset += err; |
| 932 |
trace_v9fs_version_return(pdu->tag, pdu->id, s->msize, version.data); |
| 933 |
out:
|
| 934 |
complete_pdu(s, pdu, offset); |
| 935 |
v9fs_string_free(&version); |
| 936 |
} |
| 937 |
|
| 938 |
static void v9fs_attach(void *opaque) |
| 939 |
{
|
| 940 |
V9fsPDU *pdu = opaque; |
| 941 |
V9fsState *s = pdu->s; |
| 942 |
int32_t fid, afid, n_uname; |
| 943 |
V9fsString uname, aname; |
| 944 |
V9fsFidState *fidp; |
| 945 |
size_t offset = 7;
|
| 946 |
V9fsQID qid; |
| 947 |
ssize_t err; |
| 948 |
|
| 949 |
v9fs_string_init(&uname); |
| 950 |
v9fs_string_init(&aname); |
| 951 |
err = pdu_unmarshal(pdu, offset, "ddssd", &fid,
|
| 952 |
&afid, &uname, &aname, &n_uname); |
| 953 |
if (err < 0) { |
| 954 |
goto out_nofid;
|
| 955 |
} |
| 956 |
trace_v9fs_attach(pdu->tag, pdu->id, fid, afid, uname.data, aname.data); |
| 957 |
|
| 958 |
fidp = alloc_fid(s, fid); |
| 959 |
if (fidp == NULL) { |
| 960 |
err = -EINVAL; |
| 961 |
goto out_nofid;
|
| 962 |
} |
| 963 |
fidp->uid = n_uname; |
| 964 |
err = v9fs_co_name_to_path(pdu, NULL, "/", &fidp->path); |
| 965 |
if (err < 0) { |
| 966 |
err = -EINVAL; |
| 967 |
clunk_fid(s, fid); |
| 968 |
goto out;
|
| 969 |
} |
| 970 |
err = fid_to_qid(pdu, fidp, &qid); |
| 971 |
if (err < 0) { |
| 972 |
err = -EINVAL; |
| 973 |
clunk_fid(s, fid); |
| 974 |
goto out;
|
| 975 |
} |
| 976 |
err = pdu_marshal(pdu, offset, "Q", &qid);
|
| 977 |
if (err < 0) { |
| 978 |
clunk_fid(s, fid); |
| 979 |
goto out;
|
| 980 |
} |
| 981 |
err += offset; |
| 982 |
trace_v9fs_attach_return(pdu->tag, pdu->id, |
| 983 |
qid.type, qid.version, qid.path); |
| 984 |
/*
|
| 985 |
* disable migration if we haven't done already.
|
| 986 |
* attach could get called multiple times for the same export.
|
| 987 |
*/
|
| 988 |
if (!s->migration_blocker) {
|
| 989 |
s->root_fid = fid; |
| 990 |
error_set(&s->migration_blocker, QERR_VIRTFS_FEATURE_BLOCKS_MIGRATION, |
| 991 |
s->ctx.fs_root ? s->ctx.fs_root : "NULL", s->tag);
|
| 992 |
migrate_add_blocker(s->migration_blocker); |
| 993 |
} |
| 994 |
out:
|
| 995 |
put_fid(pdu, fidp); |
| 996 |
out_nofid:
|
| 997 |
complete_pdu(s, pdu, err); |
| 998 |
v9fs_string_free(&uname); |
| 999 |
v9fs_string_free(&aname); |
| 1000 |
} |
| 1001 |
|
| 1002 |
static void v9fs_stat(void *opaque) |
| 1003 |
{
|
| 1004 |
int32_t fid; |
| 1005 |
V9fsStat v9stat; |
| 1006 |
ssize_t err = 0;
|
| 1007 |
size_t offset = 7;
|
| 1008 |
struct stat stbuf;
|
| 1009 |
V9fsFidState *fidp; |
| 1010 |
V9fsPDU *pdu = opaque; |
| 1011 |
V9fsState *s = pdu->s; |
| 1012 |
|
| 1013 |
err = pdu_unmarshal(pdu, offset, "d", &fid);
|
| 1014 |
if (err < 0) { |
| 1015 |
goto out_nofid;
|
| 1016 |
} |
| 1017 |
trace_v9fs_stat(pdu->tag, pdu->id, fid); |
| 1018 |
|
| 1019 |
fidp = get_fid(pdu, fid); |
| 1020 |
if (fidp == NULL) { |
| 1021 |
err = -ENOENT; |
| 1022 |
goto out_nofid;
|
| 1023 |
} |
| 1024 |
err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
| 1025 |
if (err < 0) { |
| 1026 |
goto out;
|
| 1027 |
} |
| 1028 |
err = stat_to_v9stat(pdu, &fidp->path, &stbuf, &v9stat); |
| 1029 |
if (err < 0) { |
| 1030 |
goto out;
|
| 1031 |
} |
| 1032 |
err = pdu_marshal(pdu, offset, "wS", 0, &v9stat); |
| 1033 |
if (err < 0) { |
| 1034 |
v9fs_stat_free(&v9stat); |
| 1035 |
goto out;
|
| 1036 |
} |
| 1037 |
trace_v9fs_stat_return(pdu->tag, pdu->id, v9stat.mode, |
| 1038 |
v9stat.atime, v9stat.mtime, v9stat.length); |
| 1039 |
err += offset; |
| 1040 |
v9fs_stat_free(&v9stat); |
| 1041 |
out:
|
| 1042 |
put_fid(pdu, fidp); |
| 1043 |
out_nofid:
|
| 1044 |
complete_pdu(s, pdu, err); |
| 1045 |
} |
| 1046 |
|
| 1047 |
static void v9fs_getattr(void *opaque) |
| 1048 |
{
|
| 1049 |
int32_t fid; |
| 1050 |
size_t offset = 7;
|
| 1051 |
ssize_t retval = 0;
|
| 1052 |
struct stat stbuf;
|
| 1053 |
V9fsFidState *fidp; |
| 1054 |
uint64_t request_mask; |
| 1055 |
V9fsStatDotl v9stat_dotl; |
| 1056 |
V9fsPDU *pdu = opaque; |
| 1057 |
V9fsState *s = pdu->s; |
| 1058 |
|
| 1059 |
retval = pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask);
|
| 1060 |
if (retval < 0) { |
| 1061 |
goto out_nofid;
|
| 1062 |
} |
| 1063 |
trace_v9fs_getattr(pdu->tag, pdu->id, fid, request_mask); |
| 1064 |
|
| 1065 |
fidp = get_fid(pdu, fid); |
| 1066 |
if (fidp == NULL) { |
| 1067 |
retval = -ENOENT; |
| 1068 |
goto out_nofid;
|
| 1069 |
} |
| 1070 |
/*
|
| 1071 |
* Currently we only support BASIC fields in stat, so there is no
|
| 1072 |
* need to look at request_mask.
|
| 1073 |
*/
|
| 1074 |
retval = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
| 1075 |
if (retval < 0) { |
| 1076 |
goto out;
|
| 1077 |
} |
| 1078 |
stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl); |
| 1079 |
|
| 1080 |
/* fill st_gen if requested and supported by underlying fs */
|
| 1081 |
if (request_mask & P9_STATS_GEN) {
|
| 1082 |
retval = v9fs_co_st_gen(pdu, &fidp->path, stbuf.st_mode, &v9stat_dotl); |
| 1083 |
if (retval < 0) { |
| 1084 |
goto out;
|
| 1085 |
} |
| 1086 |
v9stat_dotl.st_result_mask |= P9_STATS_GEN; |
| 1087 |
} |
| 1088 |
retval = pdu_marshal(pdu, offset, "A", &v9stat_dotl);
|
| 1089 |
if (retval < 0) { |
| 1090 |
goto out;
|
| 1091 |
} |
| 1092 |
retval += offset; |
| 1093 |
trace_v9fs_getattr_return(pdu->tag, pdu->id, v9stat_dotl.st_result_mask, |
| 1094 |
v9stat_dotl.st_mode, v9stat_dotl.st_uid, |
| 1095 |
v9stat_dotl.st_gid); |
| 1096 |
out:
|
| 1097 |
put_fid(pdu, fidp); |
| 1098 |
out_nofid:
|
| 1099 |
complete_pdu(s, pdu, retval); |
| 1100 |
} |
| 1101 |
|
| 1102 |
/* Attribute flags */
|
| 1103 |
#define P9_ATTR_MODE (1 << 0) |
| 1104 |
#define P9_ATTR_UID (1 << 1) |
| 1105 |
#define P9_ATTR_GID (1 << 2) |
| 1106 |
#define P9_ATTR_SIZE (1 << 3) |
| 1107 |
#define P9_ATTR_ATIME (1 << 4) |
| 1108 |
#define P9_ATTR_MTIME (1 << 5) |
| 1109 |
#define P9_ATTR_CTIME (1 << 6) |
| 1110 |
#define P9_ATTR_ATIME_SET (1 << 7) |
| 1111 |
#define P9_ATTR_MTIME_SET (1 << 8) |
| 1112 |
|
| 1113 |
#define P9_ATTR_MASK 127 |
| 1114 |
|
| 1115 |
static void v9fs_setattr(void *opaque) |
| 1116 |
{
|
| 1117 |
int err = 0; |
| 1118 |
int32_t fid; |
| 1119 |
V9fsFidState *fidp; |
| 1120 |
size_t offset = 7;
|
| 1121 |
V9fsIattr v9iattr; |
| 1122 |
V9fsPDU *pdu = opaque; |
| 1123 |
V9fsState *s = pdu->s; |
| 1124 |
|
| 1125 |
err = pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr);
|
| 1126 |
if (err < 0) { |
| 1127 |
goto out_nofid;
|
| 1128 |
} |
| 1129 |
|
| 1130 |
fidp = get_fid(pdu, fid); |
| 1131 |
if (fidp == NULL) { |
| 1132 |
err = -EINVAL; |
| 1133 |
goto out_nofid;
|
| 1134 |
} |
| 1135 |
if (v9iattr.valid & P9_ATTR_MODE) {
|
| 1136 |
err = v9fs_co_chmod(pdu, &fidp->path, v9iattr.mode); |
| 1137 |
if (err < 0) { |
| 1138 |
goto out;
|
| 1139 |
} |
| 1140 |
} |
| 1141 |
if (v9iattr.valid & (P9_ATTR_ATIME | P9_ATTR_MTIME)) {
|
| 1142 |
struct timespec times[2]; |
| 1143 |
if (v9iattr.valid & P9_ATTR_ATIME) {
|
| 1144 |
if (v9iattr.valid & P9_ATTR_ATIME_SET) {
|
| 1145 |
times[0].tv_sec = v9iattr.atime_sec;
|
| 1146 |
times[0].tv_nsec = v9iattr.atime_nsec;
|
| 1147 |
} else {
|
| 1148 |
times[0].tv_nsec = UTIME_NOW;
|
| 1149 |
} |
| 1150 |
} else {
|
| 1151 |
times[0].tv_nsec = UTIME_OMIT;
|
| 1152 |
} |
| 1153 |
if (v9iattr.valid & P9_ATTR_MTIME) {
|
| 1154 |
if (v9iattr.valid & P9_ATTR_MTIME_SET) {
|
| 1155 |
times[1].tv_sec = v9iattr.mtime_sec;
|
| 1156 |
times[1].tv_nsec = v9iattr.mtime_nsec;
|
| 1157 |
} else {
|
| 1158 |
times[1].tv_nsec = UTIME_NOW;
|
| 1159 |
} |
| 1160 |
} else {
|
| 1161 |
times[1].tv_nsec = UTIME_OMIT;
|
| 1162 |
} |
| 1163 |
err = v9fs_co_utimensat(pdu, &fidp->path, times); |
| 1164 |
if (err < 0) { |
| 1165 |
goto out;
|
| 1166 |
} |
| 1167 |
} |
| 1168 |
/*
|
| 1169 |
* If the only valid entry in iattr is ctime we can call
|
| 1170 |
* chown(-1,-1) to update the ctime of the file
|
| 1171 |
*/
|
| 1172 |
if ((v9iattr.valid & (P9_ATTR_UID | P9_ATTR_GID)) ||
|
| 1173 |
((v9iattr.valid & P9_ATTR_CTIME) |
| 1174 |
&& !((v9iattr.valid & P9_ATTR_MASK) & ~P9_ATTR_CTIME))) {
|
| 1175 |
if (!(v9iattr.valid & P9_ATTR_UID)) {
|
| 1176 |
v9iattr.uid = -1;
|
| 1177 |
} |
| 1178 |
if (!(v9iattr.valid & P9_ATTR_GID)) {
|
| 1179 |
v9iattr.gid = -1;
|
| 1180 |
} |
| 1181 |
err = v9fs_co_chown(pdu, &fidp->path, v9iattr.uid, |
| 1182 |
v9iattr.gid); |
| 1183 |
if (err < 0) { |
| 1184 |
goto out;
|
| 1185 |
} |
| 1186 |
} |
| 1187 |
if (v9iattr.valid & (P9_ATTR_SIZE)) {
|
| 1188 |
err = v9fs_co_truncate(pdu, &fidp->path, v9iattr.size); |
| 1189 |
if (err < 0) { |
| 1190 |
goto out;
|
| 1191 |
} |
| 1192 |
} |
| 1193 |
err = offset; |
| 1194 |
out:
|
| 1195 |
put_fid(pdu, fidp); |
| 1196 |
out_nofid:
|
| 1197 |
complete_pdu(s, pdu, err); |
| 1198 |
} |
| 1199 |
|
| 1200 |
static int v9fs_walk_marshal(V9fsPDU *pdu, uint16_t nwnames, V9fsQID *qids) |
| 1201 |
{
|
| 1202 |
int i;
|
| 1203 |
ssize_t err; |
| 1204 |
size_t offset = 7;
|
| 1205 |
|
| 1206 |
err = pdu_marshal(pdu, offset, "w", nwnames);
|
| 1207 |
if (err < 0) { |
| 1208 |
return err;
|
| 1209 |
} |
| 1210 |
offset += err; |
| 1211 |
for (i = 0; i < nwnames; i++) { |
| 1212 |
err = pdu_marshal(pdu, offset, "Q", &qids[i]);
|
| 1213 |
if (err < 0) { |
| 1214 |
return err;
|
| 1215 |
} |
| 1216 |
offset += err; |
| 1217 |
} |
| 1218 |
return offset;
|
| 1219 |
} |
| 1220 |
|
| 1221 |
static void v9fs_walk(void *opaque) |
| 1222 |
{
|
| 1223 |
int name_idx;
|
| 1224 |
V9fsQID *qids = NULL;
|
| 1225 |
int i, err = 0; |
| 1226 |
V9fsPath dpath, path; |
| 1227 |
uint16_t nwnames; |
| 1228 |
struct stat stbuf;
|
| 1229 |
size_t offset = 7;
|
| 1230 |
int32_t fid, newfid; |
| 1231 |
V9fsString *wnames = NULL;
|
| 1232 |
V9fsFidState *fidp; |
| 1233 |
V9fsFidState *newfidp = NULL;
|
| 1234 |
V9fsPDU *pdu = opaque; |
| 1235 |
V9fsState *s = pdu->s; |
| 1236 |
|
| 1237 |
err = pdu_unmarshal(pdu, offset, "ddw", &fid, &newfid, &nwnames);
|
| 1238 |
if (err < 0) { |
| 1239 |
complete_pdu(s, pdu, err); |
| 1240 |
return ;
|
| 1241 |
} |
| 1242 |
offset += err; |
| 1243 |
|
| 1244 |
trace_v9fs_walk(pdu->tag, pdu->id, fid, newfid, nwnames); |
| 1245 |
|
| 1246 |
if (nwnames && nwnames <= P9_MAXWELEM) {
|
| 1247 |
wnames = g_malloc0(sizeof(wnames[0]) * nwnames); |
| 1248 |
qids = g_malloc0(sizeof(qids[0]) * nwnames); |
| 1249 |
for (i = 0; i < nwnames; i++) { |
| 1250 |
err = pdu_unmarshal(pdu, offset, "s", &wnames[i]);
|
| 1251 |
if (err < 0) { |
| 1252 |
goto out_nofid;
|
| 1253 |
} |
| 1254 |
offset += err; |
| 1255 |
} |
| 1256 |
} else if (nwnames > P9_MAXWELEM) { |
| 1257 |
err = -EINVAL; |
| 1258 |
goto out_nofid;
|
| 1259 |
} |
| 1260 |
fidp = get_fid(pdu, fid); |
| 1261 |
if (fidp == NULL) { |
| 1262 |
err = -ENOENT; |
| 1263 |
goto out_nofid;
|
| 1264 |
} |
| 1265 |
v9fs_path_init(&dpath); |
| 1266 |
v9fs_path_init(&path); |
| 1267 |
/*
|
| 1268 |
* Both dpath and path initially poin to fidp.
|
| 1269 |
* Needed to handle request with nwnames == 0
|
| 1270 |
*/
|
| 1271 |
v9fs_path_copy(&dpath, &fidp->path); |
| 1272 |
v9fs_path_copy(&path, &fidp->path); |
| 1273 |
for (name_idx = 0; name_idx < nwnames; name_idx++) { |
| 1274 |
err = v9fs_co_name_to_path(pdu, &dpath, wnames[name_idx].data, &path); |
| 1275 |
if (err < 0) { |
| 1276 |
goto out;
|
| 1277 |
} |
| 1278 |
err = v9fs_co_lstat(pdu, &path, &stbuf); |
| 1279 |
if (err < 0) { |
| 1280 |
goto out;
|
| 1281 |
} |
| 1282 |
stat_to_qid(&stbuf, &qids[name_idx]); |
| 1283 |
v9fs_path_copy(&dpath, &path); |
| 1284 |
} |
| 1285 |
if (fid == newfid) {
|
| 1286 |
BUG_ON(fidp->fid_type != P9_FID_NONE); |
| 1287 |
v9fs_path_copy(&fidp->path, &path); |
| 1288 |
} else {
|
| 1289 |
newfidp = alloc_fid(s, newfid); |
| 1290 |
if (newfidp == NULL) { |
| 1291 |
err = -EINVAL; |
| 1292 |
goto out;
|
| 1293 |
} |
| 1294 |
newfidp->uid = fidp->uid; |
| 1295 |
v9fs_path_copy(&newfidp->path, &path); |
| 1296 |
} |
| 1297 |
err = v9fs_walk_marshal(pdu, nwnames, qids); |
| 1298 |
trace_v9fs_walk_return(pdu->tag, pdu->id, nwnames, qids); |
| 1299 |
out:
|
| 1300 |
put_fid(pdu, fidp); |
| 1301 |
if (newfidp) {
|
| 1302 |
put_fid(pdu, newfidp); |
| 1303 |
} |
| 1304 |
v9fs_path_free(&dpath); |
| 1305 |
v9fs_path_free(&path); |
| 1306 |
out_nofid:
|
| 1307 |
complete_pdu(s, pdu, err); |
| 1308 |
if (nwnames && nwnames <= P9_MAXWELEM) {
|
| 1309 |
for (name_idx = 0; name_idx < nwnames; name_idx++) { |
| 1310 |
v9fs_string_free(&wnames[name_idx]); |
| 1311 |
} |
| 1312 |
g_free(wnames); |
| 1313 |
g_free(qids); |
| 1314 |
} |
| 1315 |
} |
| 1316 |
|
| 1317 |
static int32_t get_iounit(V9fsPDU *pdu, V9fsPath *path)
|
| 1318 |
{
|
| 1319 |
struct statfs stbuf;
|
| 1320 |
int32_t iounit = 0;
|
| 1321 |
V9fsState *s = pdu->s; |
| 1322 |
|
| 1323 |
/*
|
| 1324 |
* iounit should be multiples of f_bsize (host filesystem block size
|
| 1325 |
* and as well as less than (client msize - P9_IOHDRSZ))
|
| 1326 |
*/
|
| 1327 |
if (!v9fs_co_statfs(pdu, path, &stbuf)) {
|
| 1328 |
iounit = stbuf.f_bsize; |
| 1329 |
iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; |
| 1330 |
} |
| 1331 |
if (!iounit) {
|
| 1332 |
iounit = s->msize - P9_IOHDRSZ; |
| 1333 |
} |
| 1334 |
return iounit;
|
| 1335 |
} |
| 1336 |
|
| 1337 |
static void v9fs_open(void *opaque) |
| 1338 |
{
|
| 1339 |
int flags;
|
| 1340 |
int32_t fid; |
| 1341 |
int32_t mode; |
| 1342 |
V9fsQID qid; |
| 1343 |
int iounit = 0; |
| 1344 |
ssize_t err = 0;
|
| 1345 |
size_t offset = 7;
|
| 1346 |
struct stat stbuf;
|
| 1347 |
V9fsFidState *fidp; |
| 1348 |
V9fsPDU *pdu = opaque; |
| 1349 |
V9fsState *s = pdu->s; |
| 1350 |
|
| 1351 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
| 1352 |
err = pdu_unmarshal(pdu, offset, "dd", &fid, &mode);
|
| 1353 |
} else {
|
| 1354 |
uint8_t modebyte; |
| 1355 |
err = pdu_unmarshal(pdu, offset, "db", &fid, &modebyte);
|
| 1356 |
mode = modebyte; |
| 1357 |
} |
| 1358 |
if (err < 0) { |
| 1359 |
goto out_nofid;
|
| 1360 |
} |
| 1361 |
trace_v9fs_open(pdu->tag, pdu->id, fid, mode); |
| 1362 |
|
| 1363 |
fidp = get_fid(pdu, fid); |
| 1364 |
if (fidp == NULL) { |
| 1365 |
err = -ENOENT; |
| 1366 |
goto out_nofid;
|
| 1367 |
} |
| 1368 |
BUG_ON(fidp->fid_type != P9_FID_NONE); |
| 1369 |
|
| 1370 |
err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
| 1371 |
if (err < 0) { |
| 1372 |
goto out;
|
| 1373 |
} |
| 1374 |
stat_to_qid(&stbuf, &qid); |
| 1375 |
if (S_ISDIR(stbuf.st_mode)) {
|
| 1376 |
err = v9fs_co_opendir(pdu, fidp); |
| 1377 |
if (err < 0) { |
| 1378 |
goto out;
|
| 1379 |
} |
| 1380 |
fidp->fid_type = P9_FID_DIR; |
| 1381 |
err = pdu_marshal(pdu, offset, "Qd", &qid, 0); |
| 1382 |
if (err < 0) { |
| 1383 |
goto out;
|
| 1384 |
} |
| 1385 |
err += offset; |
| 1386 |
} else {
|
| 1387 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
| 1388 |
flags = get_dotl_openflags(s, mode); |
| 1389 |
} else {
|
| 1390 |
flags = omode_to_uflags(mode); |
| 1391 |
} |
| 1392 |
if (is_ro_export(&s->ctx)) {
|
| 1393 |
if (mode & O_WRONLY || mode & O_RDWR ||
|
| 1394 |
mode & O_APPEND || mode & O_TRUNC) {
|
| 1395 |
err = -EROFS; |
| 1396 |
goto out;
|
| 1397 |
} |
| 1398 |
} |
| 1399 |
err = v9fs_co_open(pdu, fidp, flags); |
| 1400 |
if (err < 0) { |
| 1401 |
goto out;
|
| 1402 |
} |
| 1403 |
fidp->fid_type = P9_FID_FILE; |
| 1404 |
fidp->open_flags = flags; |
| 1405 |
if (flags & O_EXCL) {
|
| 1406 |
/*
|
| 1407 |
* We let the host file system do O_EXCL check
|
| 1408 |
* We should not reclaim such fd
|
| 1409 |
*/
|
| 1410 |
fidp->flags |= FID_NON_RECLAIMABLE; |
| 1411 |
} |
| 1412 |
iounit = get_iounit(pdu, &fidp->path); |
| 1413 |
err = pdu_marshal(pdu, offset, "Qd", &qid, iounit);
|
| 1414 |
if (err < 0) { |
| 1415 |
goto out;
|
| 1416 |
} |
| 1417 |
err += offset; |
| 1418 |
} |
| 1419 |
trace_v9fs_open_return(pdu->tag, pdu->id, |
| 1420 |
qid.type, qid.version, qid.path, iounit); |
| 1421 |
out:
|
| 1422 |
put_fid(pdu, fidp); |
| 1423 |
out_nofid:
|
| 1424 |
complete_pdu(s, pdu, err); |
| 1425 |
} |
| 1426 |
|
| 1427 |
static void v9fs_lcreate(void *opaque) |
| 1428 |
{
|
| 1429 |
int32_t dfid, flags, mode; |
| 1430 |
gid_t gid; |
| 1431 |
ssize_t err = 0;
|
| 1432 |
ssize_t offset = 7;
|
| 1433 |
V9fsString name; |
| 1434 |
V9fsFidState *fidp; |
| 1435 |
struct stat stbuf;
|
| 1436 |
V9fsQID qid; |
| 1437 |
int32_t iounit; |
| 1438 |
V9fsPDU *pdu = opaque; |
| 1439 |
|
| 1440 |
v9fs_string_init(&name); |
| 1441 |
err = pdu_unmarshal(pdu, offset, "dsddd", &dfid,
|
| 1442 |
&name, &flags, &mode, &gid); |
| 1443 |
if (err < 0) { |
| 1444 |
goto out_nofid;
|
| 1445 |
} |
| 1446 |
trace_v9fs_lcreate(pdu->tag, pdu->id, dfid, flags, mode, gid); |
| 1447 |
|
| 1448 |
fidp = get_fid(pdu, dfid); |
| 1449 |
if (fidp == NULL) { |
| 1450 |
err = -ENOENT; |
| 1451 |
goto out_nofid;
|
| 1452 |
} |
| 1453 |
|
| 1454 |
flags = get_dotl_openflags(pdu->s, flags); |
| 1455 |
err = v9fs_co_open2(pdu, fidp, &name, gid, |
| 1456 |
flags | O_CREAT, mode, &stbuf); |
| 1457 |
if (err < 0) { |
| 1458 |
goto out;
|
| 1459 |
} |
| 1460 |
fidp->fid_type = P9_FID_FILE; |
| 1461 |
fidp->open_flags = flags; |
| 1462 |
if (flags & O_EXCL) {
|
| 1463 |
/*
|
| 1464 |
* We let the host file system do O_EXCL check
|
| 1465 |
* We should not reclaim such fd
|
| 1466 |
*/
|
| 1467 |
fidp->flags |= FID_NON_RECLAIMABLE; |
| 1468 |
} |
| 1469 |
iounit = get_iounit(pdu, &fidp->path); |
| 1470 |
stat_to_qid(&stbuf, &qid); |
| 1471 |
err = pdu_marshal(pdu, offset, "Qd", &qid, iounit);
|
| 1472 |
if (err < 0) { |
| 1473 |
goto out;
|
| 1474 |
} |
| 1475 |
err += offset; |
| 1476 |
trace_v9fs_lcreate_return(pdu->tag, pdu->id, |
| 1477 |
qid.type, qid.version, qid.path, iounit); |
| 1478 |
out:
|
| 1479 |
put_fid(pdu, fidp); |
| 1480 |
out_nofid:
|
| 1481 |
complete_pdu(pdu->s, pdu, err); |
| 1482 |
v9fs_string_free(&name); |
| 1483 |
} |
| 1484 |
|
| 1485 |
static void v9fs_fsync(void *opaque) |
| 1486 |
{
|
| 1487 |
int err;
|
| 1488 |
int32_t fid; |
| 1489 |
int datasync;
|
| 1490 |
size_t offset = 7;
|
| 1491 |
V9fsFidState *fidp; |
| 1492 |
V9fsPDU *pdu = opaque; |
| 1493 |
V9fsState *s = pdu->s; |
| 1494 |
|
| 1495 |
err = pdu_unmarshal(pdu, offset, "dd", &fid, &datasync);
|
| 1496 |
if (err < 0) { |
| 1497 |
goto out_nofid;
|
| 1498 |
} |
| 1499 |
trace_v9fs_fsync(pdu->tag, pdu->id, fid, datasync); |
| 1500 |
|
| 1501 |
fidp = get_fid(pdu, fid); |
| 1502 |
if (fidp == NULL) { |
| 1503 |
err = -ENOENT; |
| 1504 |
goto out_nofid;
|
| 1505 |
} |
| 1506 |
err = v9fs_co_fsync(pdu, fidp, datasync); |
| 1507 |
if (!err) {
|
| 1508 |
err = offset; |
| 1509 |
} |
| 1510 |
put_fid(pdu, fidp); |
| 1511 |
out_nofid:
|
| 1512 |
complete_pdu(s, pdu, err); |
| 1513 |
} |
| 1514 |
|
| 1515 |
static void v9fs_clunk(void *opaque) |
| 1516 |
{
|
| 1517 |
int err;
|
| 1518 |
int32_t fid; |
| 1519 |
size_t offset = 7;
|
| 1520 |
V9fsFidState *fidp; |
| 1521 |
V9fsPDU *pdu = opaque; |
| 1522 |
V9fsState *s = pdu->s; |
| 1523 |
|
| 1524 |
err = pdu_unmarshal(pdu, offset, "d", &fid);
|
| 1525 |
if (err < 0) { |
| 1526 |
goto out_nofid;
|
| 1527 |
} |
| 1528 |
trace_v9fs_clunk(pdu->tag, pdu->id, fid); |
| 1529 |
|
| 1530 |
fidp = clunk_fid(s, fid); |
| 1531 |
if (fidp == NULL) { |
| 1532 |
err = -ENOENT; |
| 1533 |
goto out_nofid;
|
| 1534 |
} |
| 1535 |
/*
|
| 1536 |
* Bump the ref so that put_fid will
|
| 1537 |
* free the fid.
|
| 1538 |
*/
|
| 1539 |
fidp->ref++; |
| 1540 |
err = put_fid(pdu, fidp); |
| 1541 |
if (!err) {
|
| 1542 |
err = offset; |
| 1543 |
} |
| 1544 |
out_nofid:
|
| 1545 |
complete_pdu(s, pdu, err); |
| 1546 |
} |
| 1547 |
|
| 1548 |
static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, |
| 1549 |
uint64_t off, uint32_t max_count) |
| 1550 |
{
|
| 1551 |
ssize_t err; |
| 1552 |
size_t offset = 7;
|
| 1553 |
int read_count;
|
| 1554 |
int64_t xattr_len; |
| 1555 |
|
| 1556 |
xattr_len = fidp->fs.xattr.len; |
| 1557 |
read_count = xattr_len - off; |
| 1558 |
if (read_count > max_count) {
|
| 1559 |
read_count = max_count; |
| 1560 |
} else if (read_count < 0) { |
| 1561 |
/*
|
| 1562 |
* read beyond XATTR value
|
| 1563 |
*/
|
| 1564 |
read_count = 0;
|
| 1565 |
} |
| 1566 |
err = pdu_marshal(pdu, offset, "d", read_count);
|
| 1567 |
if (err < 0) { |
| 1568 |
return err;
|
| 1569 |
} |
| 1570 |
offset += err; |
| 1571 |
err = v9fs_pack(pdu->elem.in_sg, pdu->elem.in_num, offset, |
| 1572 |
((char *)fidp->fs.xattr.value) + off,
|
| 1573 |
read_count); |
| 1574 |
if (err < 0) { |
| 1575 |
return err;
|
| 1576 |
} |
| 1577 |
offset += err; |
| 1578 |
return offset;
|
| 1579 |
} |
| 1580 |
|
| 1581 |
static int v9fs_do_readdir_with_stat(V9fsPDU *pdu, |
| 1582 |
V9fsFidState *fidp, uint32_t max_count) |
| 1583 |
{
|
| 1584 |
V9fsPath path; |
| 1585 |
V9fsStat v9stat; |
| 1586 |
int len, err = 0; |
| 1587 |
int32_t count = 0;
|
| 1588 |
struct stat stbuf;
|
| 1589 |
off_t saved_dir_pos; |
| 1590 |
struct dirent *dent, *result;
|
| 1591 |
|
| 1592 |
/* save the directory position */
|
| 1593 |
saved_dir_pos = v9fs_co_telldir(pdu, fidp); |
| 1594 |
if (saved_dir_pos < 0) { |
| 1595 |
return saved_dir_pos;
|
| 1596 |
} |
| 1597 |
|
| 1598 |
dent = g_malloc(sizeof(struct dirent)); |
| 1599 |
|
| 1600 |
while (1) { |
| 1601 |
v9fs_path_init(&path); |
| 1602 |
err = v9fs_co_readdir_r(pdu, fidp, dent, &result); |
| 1603 |
if (err || !result) {
|
| 1604 |
break;
|
| 1605 |
} |
| 1606 |
err = v9fs_co_name_to_path(pdu, &fidp->path, dent->d_name, &path); |
| 1607 |
if (err < 0) { |
| 1608 |
goto out;
|
| 1609 |
} |
| 1610 |
err = v9fs_co_lstat(pdu, &path, &stbuf); |
| 1611 |
if (err < 0) { |
| 1612 |
goto out;
|
| 1613 |
} |
| 1614 |
err = stat_to_v9stat(pdu, &path, &stbuf, &v9stat); |
| 1615 |
if (err < 0) { |
| 1616 |
goto out;
|
| 1617 |
} |
| 1618 |
/* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */
|
| 1619 |
len = pdu_marshal(pdu, 11 + count, "S", &v9stat); |
| 1620 |
if ((len != (v9stat.size + 2)) || ((count + len) > max_count)) { |
| 1621 |
/* Ran out of buffer. Set dir back to old position and return */
|
| 1622 |
v9fs_co_seekdir(pdu, fidp, saved_dir_pos); |
| 1623 |
v9fs_stat_free(&v9stat); |
| 1624 |
v9fs_path_free(&path); |
| 1625 |
g_free(dent); |
| 1626 |
return count;
|
| 1627 |
} |
| 1628 |
count += len; |
| 1629 |
v9fs_stat_free(&v9stat); |
| 1630 |
v9fs_path_free(&path); |
| 1631 |
saved_dir_pos = dent->d_off; |
| 1632 |
} |
| 1633 |
out:
|
| 1634 |
g_free(dent); |
| 1635 |
v9fs_path_free(&path); |
| 1636 |
if (err < 0) { |
| 1637 |
return err;
|
| 1638 |
} |
| 1639 |
return count;
|
| 1640 |
} |
| 1641 |
|
| 1642 |
/*
|
| 1643 |
* Create a QEMUIOVector for a sub-region of PDU iovecs
|
| 1644 |
*
|
| 1645 |
* @qiov: uninitialized QEMUIOVector
|
| 1646 |
* @skip: number of bytes to skip from beginning of PDU
|
| 1647 |
* @size: number of bytes to include
|
| 1648 |
* @is_write: true - write, false - read
|
| 1649 |
*
|
| 1650 |
* The resulting QEMUIOVector has heap-allocated iovecs and must be cleaned up
|
| 1651 |
* with qemu_iovec_destroy().
|
| 1652 |
*/
|
| 1653 |
static void v9fs_init_qiov_from_pdu(QEMUIOVector *qiov, V9fsPDU *pdu, |
| 1654 |
size_t skip, size_t size, |
| 1655 |
bool is_write)
|
| 1656 |
{
|
| 1657 |
QEMUIOVector elem; |
| 1658 |
struct iovec *iov;
|
| 1659 |
unsigned int niov; |
| 1660 |
|
| 1661 |
if (is_write) {
|
| 1662 |
iov = pdu->elem.out_sg; |
| 1663 |
niov = pdu->elem.out_num; |
| 1664 |
} else {
|
| 1665 |
iov = pdu->elem.in_sg; |
| 1666 |
niov = pdu->elem.in_num; |
| 1667 |
} |
| 1668 |
|
| 1669 |
qemu_iovec_init_external(&elem, iov, niov); |
| 1670 |
qemu_iovec_init(qiov, niov); |
| 1671 |
qemu_iovec_concat(qiov, &elem, skip, size); |
| 1672 |
} |
| 1673 |
|
| 1674 |
static void v9fs_read(void *opaque) |
| 1675 |
{
|
| 1676 |
int32_t fid; |
| 1677 |
uint64_t off; |
| 1678 |
ssize_t err = 0;
|
| 1679 |
int32_t count = 0;
|
| 1680 |
size_t offset = 7;
|
| 1681 |
uint32_t max_count; |
| 1682 |
V9fsFidState *fidp; |
| 1683 |
V9fsPDU *pdu = opaque; |
| 1684 |
V9fsState *s = pdu->s; |
| 1685 |
|
| 1686 |
err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &max_count);
|
| 1687 |
if (err < 0) { |
| 1688 |
goto out_nofid;
|
| 1689 |
} |
| 1690 |
trace_v9fs_read(pdu->tag, pdu->id, fid, off, max_count); |
| 1691 |
|
| 1692 |
fidp = get_fid(pdu, fid); |
| 1693 |
if (fidp == NULL) { |
| 1694 |
err = -EINVAL; |
| 1695 |
goto out_nofid;
|
| 1696 |
} |
| 1697 |
if (fidp->fid_type == P9_FID_DIR) {
|
| 1698 |
|
| 1699 |
if (off == 0) { |
| 1700 |
v9fs_co_rewinddir(pdu, fidp); |
| 1701 |
} |
| 1702 |
count = v9fs_do_readdir_with_stat(pdu, fidp, max_count); |
| 1703 |
if (count < 0) { |
| 1704 |
err = count; |
| 1705 |
goto out;
|
| 1706 |
} |
| 1707 |
err = pdu_marshal(pdu, offset, "d", count);
|
| 1708 |
if (err < 0) { |
| 1709 |
goto out;
|
| 1710 |
} |
| 1711 |
err += offset + count; |
| 1712 |
} else if (fidp->fid_type == P9_FID_FILE) { |
| 1713 |
QEMUIOVector qiov_full; |
| 1714 |
QEMUIOVector qiov; |
| 1715 |
int32_t len; |
| 1716 |
|
| 1717 |
v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset + 4, max_count, false); |
| 1718 |
qemu_iovec_init(&qiov, qiov_full.niov); |
| 1719 |
do {
|
| 1720 |
qemu_iovec_reset(&qiov); |
| 1721 |
qemu_iovec_concat(&qiov, &qiov_full, count, qiov_full.size - count); |
| 1722 |
if (0) { |
| 1723 |
print_sg(qiov.iov, qiov.niov); |
| 1724 |
} |
| 1725 |
/* Loop in case of EINTR */
|
| 1726 |
do {
|
| 1727 |
len = v9fs_co_preadv(pdu, fidp, qiov.iov, qiov.niov, off); |
| 1728 |
if (len >= 0) { |
| 1729 |
off += len; |
| 1730 |
count += len; |
| 1731 |
} |
| 1732 |
} while (len == -EINTR && !pdu->cancelled);
|
| 1733 |
if (len < 0) { |
| 1734 |
/* IO error return the error */
|
| 1735 |
err = len; |
| 1736 |
goto out;
|
| 1737 |
} |
| 1738 |
} while (count < max_count && len > 0); |
| 1739 |
err = pdu_marshal(pdu, offset, "d", count);
|
| 1740 |
if (err < 0) { |
| 1741 |
goto out;
|
| 1742 |
} |
| 1743 |
err += offset + count; |
| 1744 |
qemu_iovec_destroy(&qiov); |
| 1745 |
qemu_iovec_destroy(&qiov_full); |
| 1746 |
} else if (fidp->fid_type == P9_FID_XATTR) { |
| 1747 |
err = v9fs_xattr_read(s, pdu, fidp, off, max_count); |
| 1748 |
} else {
|
| 1749 |
err = -EINVAL; |
| 1750 |
} |
| 1751 |
trace_v9fs_read_return(pdu->tag, pdu->id, count, err); |
| 1752 |
out:
|
| 1753 |
put_fid(pdu, fidp); |
| 1754 |
out_nofid:
|
| 1755 |
complete_pdu(s, pdu, err); |
| 1756 |
} |
| 1757 |
|
| 1758 |
static size_t v9fs_readdir_data_size(V9fsString *name)
|
| 1759 |
{
|
| 1760 |
/*
|
| 1761 |
* Size of each dirent on the wire: size of qid (13) + size of offset (8)
|
| 1762 |
* size of type (1) + size of name.size (2) + strlen(name.data)
|
| 1763 |
*/
|
| 1764 |
return 24 + v9fs_string_size(name); |
| 1765 |
} |
| 1766 |
|
| 1767 |
static int v9fs_do_readdir(V9fsPDU *pdu, |
| 1768 |
V9fsFidState *fidp, int32_t max_count) |
| 1769 |
{
|
| 1770 |
size_t size; |
| 1771 |
V9fsQID qid; |
| 1772 |
V9fsString name; |
| 1773 |
int len, err = 0; |
| 1774 |
int32_t count = 0;
|
| 1775 |
off_t saved_dir_pos; |
| 1776 |
struct dirent *dent, *result;
|
| 1777 |
|
| 1778 |
/* save the directory position */
|
| 1779 |
saved_dir_pos = v9fs_co_telldir(pdu, fidp); |
| 1780 |
if (saved_dir_pos < 0) { |
| 1781 |
return saved_dir_pos;
|
| 1782 |
} |
| 1783 |
|
| 1784 |
dent = g_malloc(sizeof(struct dirent)); |
| 1785 |
|
| 1786 |
while (1) { |
| 1787 |
err = v9fs_co_readdir_r(pdu, fidp, dent, &result); |
| 1788 |
if (err || !result) {
|
| 1789 |
break;
|
| 1790 |
} |
| 1791 |
v9fs_string_init(&name); |
| 1792 |
v9fs_string_sprintf(&name, "%s", dent->d_name);
|
| 1793 |
if ((count + v9fs_readdir_data_size(&name)) > max_count) {
|
| 1794 |
/* Ran out of buffer. Set dir back to old position and return */
|
| 1795 |
v9fs_co_seekdir(pdu, fidp, saved_dir_pos); |
| 1796 |
v9fs_string_free(&name); |
| 1797 |
g_free(dent); |
| 1798 |
return count;
|
| 1799 |
} |
| 1800 |
/*
|
| 1801 |
* Fill up just the path field of qid because the client uses
|
| 1802 |
* only that. To fill the entire qid structure we will have
|
| 1803 |
* to stat each dirent found, which is expensive
|
| 1804 |
*/
|
| 1805 |
size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); |
| 1806 |
memcpy(&qid.path, &dent->d_ino, size); |
| 1807 |
/* Fill the other fields with dummy values */
|
| 1808 |
qid.type = 0;
|
| 1809 |
qid.version = 0;
|
| 1810 |
|
| 1811 |
/* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */
|
| 1812 |
len = pdu_marshal(pdu, 11 + count, "Qqbs", |
| 1813 |
&qid, dent->d_off, |
| 1814 |
dent->d_type, &name); |
| 1815 |
if (len < 0) { |
| 1816 |
v9fs_co_seekdir(pdu, fidp, saved_dir_pos); |
| 1817 |
v9fs_string_free(&name); |
| 1818 |
g_free(dent); |
| 1819 |
return len;
|
| 1820 |
} |
| 1821 |
count += len; |
| 1822 |
v9fs_string_free(&name); |
| 1823 |
saved_dir_pos = dent->d_off; |
| 1824 |
} |
| 1825 |
g_free(dent); |
| 1826 |
if (err < 0) { |
| 1827 |
return err;
|
| 1828 |
} |
| 1829 |
return count;
|
| 1830 |
} |
| 1831 |
|
| 1832 |
static void v9fs_readdir(void *opaque) |
| 1833 |
{
|
| 1834 |
int32_t fid; |
| 1835 |
V9fsFidState *fidp; |
| 1836 |
ssize_t retval = 0;
|
| 1837 |
size_t offset = 7;
|
| 1838 |
uint64_t initial_offset; |
| 1839 |
int32_t count; |
| 1840 |
uint32_t max_count; |
| 1841 |
V9fsPDU *pdu = opaque; |
| 1842 |
V9fsState *s = pdu->s; |
| 1843 |
|
| 1844 |
retval = pdu_unmarshal(pdu, offset, "dqd", &fid,
|
| 1845 |
&initial_offset, &max_count); |
| 1846 |
if (retval < 0) { |
| 1847 |
goto out_nofid;
|
| 1848 |
} |
| 1849 |
trace_v9fs_readdir(pdu->tag, pdu->id, fid, initial_offset, max_count); |
| 1850 |
|
| 1851 |
fidp = get_fid(pdu, fid); |
| 1852 |
if (fidp == NULL) { |
| 1853 |
retval = -EINVAL; |
| 1854 |
goto out_nofid;
|
| 1855 |
} |
| 1856 |
if (!fidp->fs.dir) {
|
| 1857 |
retval = -EINVAL; |
| 1858 |
goto out;
|
| 1859 |
} |
| 1860 |
if (initial_offset == 0) { |
| 1861 |
v9fs_co_rewinddir(pdu, fidp); |
| 1862 |
} else {
|
| 1863 |
v9fs_co_seekdir(pdu, fidp, initial_offset); |
| 1864 |
} |
| 1865 |
count = v9fs_do_readdir(pdu, fidp, max_count); |
| 1866 |
if (count < 0) { |
| 1867 |
retval = count; |
| 1868 |
goto out;
|
| 1869 |
} |
| 1870 |
retval = pdu_marshal(pdu, offset, "d", count);
|
| 1871 |
if (retval < 0) { |
| 1872 |
goto out;
|
| 1873 |
} |
| 1874 |
retval += count + offset; |
| 1875 |
trace_v9fs_readdir_return(pdu->tag, pdu->id, count, retval); |
| 1876 |
out:
|
| 1877 |
put_fid(pdu, fidp); |
| 1878 |
out_nofid:
|
| 1879 |
complete_pdu(s, pdu, retval); |
| 1880 |
} |
| 1881 |
|
| 1882 |
static int v9fs_xattr_write(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, |
| 1883 |
uint64_t off, uint32_t count, |
| 1884 |
struct iovec *sg, int cnt) |
| 1885 |
{
|
| 1886 |
int i, to_copy;
|
| 1887 |
ssize_t err = 0;
|
| 1888 |
int write_count;
|
| 1889 |
int64_t xattr_len; |
| 1890 |
size_t offset = 7;
|
| 1891 |
|
| 1892 |
|
| 1893 |
xattr_len = fidp->fs.xattr.len; |
| 1894 |
write_count = xattr_len - off; |
| 1895 |
if (write_count > count) {
|
| 1896 |
write_count = count; |
| 1897 |
} else if (write_count < 0) { |
| 1898 |
/*
|
| 1899 |
* write beyond XATTR value len specified in
|
| 1900 |
* xattrcreate
|
| 1901 |
*/
|
| 1902 |
err = -ENOSPC; |
| 1903 |
goto out;
|
| 1904 |
} |
| 1905 |
err = pdu_marshal(pdu, offset, "d", write_count);
|
| 1906 |
if (err < 0) { |
| 1907 |
return err;
|
| 1908 |
} |
| 1909 |
err += offset; |
| 1910 |
fidp->fs.xattr.copied_len += write_count; |
| 1911 |
/*
|
| 1912 |
* Now copy the content from sg list
|
| 1913 |
*/
|
| 1914 |
for (i = 0; i < cnt; i++) { |
| 1915 |
if (write_count > sg[i].iov_len) {
|
| 1916 |
to_copy = sg[i].iov_len; |
| 1917 |
} else {
|
| 1918 |
to_copy = write_count; |
| 1919 |
} |
| 1920 |
memcpy((char *)fidp->fs.xattr.value + off, sg[i].iov_base, to_copy);
|
| 1921 |
/* updating vs->off since we are not using below */
|
| 1922 |
off += to_copy; |
| 1923 |
write_count -= to_copy; |
| 1924 |
} |
| 1925 |
out:
|
| 1926 |
return err;
|
| 1927 |
} |
| 1928 |
|
| 1929 |
static void v9fs_write(void *opaque) |
| 1930 |
{
|
| 1931 |
ssize_t err; |
| 1932 |
int32_t fid; |
| 1933 |
uint64_t off; |
| 1934 |
uint32_t count; |
| 1935 |
int32_t len = 0;
|
| 1936 |
int32_t total = 0;
|
| 1937 |
size_t offset = 7;
|
| 1938 |
V9fsFidState *fidp; |
| 1939 |
V9fsPDU *pdu = opaque; |
| 1940 |
V9fsState *s = pdu->s; |
| 1941 |
QEMUIOVector qiov_full; |
| 1942 |
QEMUIOVector qiov; |
| 1943 |
|
| 1944 |
err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &count);
|
| 1945 |
if (err < 0) { |
| 1946 |
return complete_pdu(s, pdu, err);
|
| 1947 |
} |
| 1948 |
offset += err; |
| 1949 |
v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, count, true);
|
| 1950 |
trace_v9fs_write(pdu->tag, pdu->id, fid, off, count, qiov_full.niov); |
| 1951 |
|
| 1952 |
fidp = get_fid(pdu, fid); |
| 1953 |
if (fidp == NULL) { |
| 1954 |
err = -EINVAL; |
| 1955 |
goto out_nofid;
|
| 1956 |
} |
| 1957 |
if (fidp->fid_type == P9_FID_FILE) {
|
| 1958 |
if (fidp->fs.fd == -1) { |
| 1959 |
err = -EINVAL; |
| 1960 |
goto out;
|
| 1961 |
} |
| 1962 |
} else if (fidp->fid_type == P9_FID_XATTR) { |
| 1963 |
/*
|
| 1964 |
* setxattr operation
|
| 1965 |
*/
|
| 1966 |
err = v9fs_xattr_write(s, pdu, fidp, off, count, |
| 1967 |
qiov_full.iov, qiov_full.niov); |
| 1968 |
goto out;
|
| 1969 |
} else {
|
| 1970 |
err = -EINVAL; |
| 1971 |
goto out;
|
| 1972 |
} |
| 1973 |
qemu_iovec_init(&qiov, qiov_full.niov); |
| 1974 |
do {
|
| 1975 |
qemu_iovec_reset(&qiov); |
| 1976 |
qemu_iovec_concat(&qiov, &qiov_full, total, qiov_full.size - total); |
| 1977 |
if (0) { |
| 1978 |
print_sg(qiov.iov, qiov.niov); |
| 1979 |
} |
| 1980 |
/* Loop in case of EINTR */
|
| 1981 |
do {
|
| 1982 |
len = v9fs_co_pwritev(pdu, fidp, qiov.iov, qiov.niov, off); |
| 1983 |
if (len >= 0) { |
| 1984 |
off += len; |
| 1985 |
total += len; |
| 1986 |
} |
| 1987 |
} while (len == -EINTR && !pdu->cancelled);
|
| 1988 |
if (len < 0) { |
| 1989 |
/* IO error return the error */
|
| 1990 |
err = len; |
| 1991 |
goto out_qiov;
|
| 1992 |
} |
| 1993 |
} while (total < count && len > 0); |
| 1994 |
|
| 1995 |
offset = 7;
|
| 1996 |
err = pdu_marshal(pdu, offset, "d", total);
|
| 1997 |
if (err < 0) { |
| 1998 |
goto out;
|
| 1999 |
} |
| 2000 |
err += offset; |
| 2001 |
trace_v9fs_write_return(pdu->tag, pdu->id, total, err); |
| 2002 |
out_qiov:
|
| 2003 |
qemu_iovec_destroy(&qiov); |
| 2004 |
out:
|
| 2005 |
put_fid(pdu, fidp); |
| 2006 |
out_nofid:
|
| 2007 |
qemu_iovec_destroy(&qiov_full); |
| 2008 |
complete_pdu(s, pdu, err); |
| 2009 |
} |
| 2010 |
|
| 2011 |
static void v9fs_create(void *opaque) |
| 2012 |
{
|
| 2013 |
int32_t fid; |
| 2014 |
int err = 0; |
| 2015 |
size_t offset = 7;
|
| 2016 |
V9fsFidState *fidp; |
| 2017 |
V9fsQID qid; |
| 2018 |
int32_t perm; |
| 2019 |
int8_t mode; |
| 2020 |
V9fsPath path; |
| 2021 |
struct stat stbuf;
|
| 2022 |
V9fsString name; |
| 2023 |
V9fsString extension; |
| 2024 |
int iounit;
|
| 2025 |
V9fsPDU *pdu = opaque; |
| 2026 |
|
| 2027 |
v9fs_path_init(&path); |
| 2028 |
v9fs_string_init(&name); |
| 2029 |
v9fs_string_init(&extension); |
| 2030 |
err = pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name,
|
| 2031 |
&perm, &mode, &extension); |
| 2032 |
if (err < 0) { |
| 2033 |
goto out_nofid;
|
| 2034 |
} |
| 2035 |
trace_v9fs_create(pdu->tag, pdu->id, fid, name.data, perm, mode); |
| 2036 |
|
| 2037 |
fidp = get_fid(pdu, fid); |
| 2038 |
if (fidp == NULL) { |
| 2039 |
err = -EINVAL; |
| 2040 |
goto out_nofid;
|
| 2041 |
} |
| 2042 |
if (perm & P9_STAT_MODE_DIR) {
|
| 2043 |
err = v9fs_co_mkdir(pdu, fidp, &name, perm & 0777,
|
| 2044 |
fidp->uid, -1, &stbuf);
|
| 2045 |
if (err < 0) { |
| 2046 |
goto out;
|
| 2047 |
} |
| 2048 |
err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
| 2049 |
if (err < 0) { |
| 2050 |
goto out;
|
| 2051 |
} |
| 2052 |
v9fs_path_copy(&fidp->path, &path); |
| 2053 |
err = v9fs_co_opendir(pdu, fidp); |
| 2054 |
if (err < 0) { |
| 2055 |
goto out;
|
| 2056 |
} |
| 2057 |
fidp->fid_type = P9_FID_DIR; |
| 2058 |
} else if (perm & P9_STAT_MODE_SYMLINK) { |
| 2059 |
err = v9fs_co_symlink(pdu, fidp, &name, |
| 2060 |
extension.data, -1 , &stbuf);
|
| 2061 |
if (err < 0) { |
| 2062 |
goto out;
|
| 2063 |
} |
| 2064 |
err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
| 2065 |
if (err < 0) { |
| 2066 |
goto out;
|
| 2067 |
} |
| 2068 |
v9fs_path_copy(&fidp->path, &path); |
| 2069 |
} else if (perm & P9_STAT_MODE_LINK) { |
| 2070 |
int32_t ofid = atoi(extension.data); |
| 2071 |
V9fsFidState *ofidp = get_fid(pdu, ofid); |
| 2072 |
if (ofidp == NULL) { |
| 2073 |
err = -EINVAL; |
| 2074 |
goto out;
|
| 2075 |
} |
| 2076 |
err = v9fs_co_link(pdu, ofidp, fidp, &name); |
| 2077 |
put_fid(pdu, ofidp); |
| 2078 |
if (err < 0) { |
| 2079 |
goto out;
|
| 2080 |
} |
| 2081 |
err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
| 2082 |
if (err < 0) { |
| 2083 |
fidp->fid_type = P9_FID_NONE; |
| 2084 |
goto out;
|
| 2085 |
} |
| 2086 |
v9fs_path_copy(&fidp->path, &path); |
| 2087 |
err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
| 2088 |
if (err < 0) { |
| 2089 |
fidp->fid_type = P9_FID_NONE; |
| 2090 |
goto out;
|
| 2091 |
} |
| 2092 |
} else if (perm & P9_STAT_MODE_DEVICE) { |
| 2093 |
char ctype;
|
| 2094 |
uint32_t major, minor; |
| 2095 |
mode_t nmode = 0;
|
| 2096 |
|
| 2097 |
if (sscanf(extension.data, "%c %u %u", &ctype, &major, &minor) != 3) { |
| 2098 |
err = -errno; |
| 2099 |
goto out;
|
| 2100 |
} |
| 2101 |
|
| 2102 |
switch (ctype) {
|
| 2103 |
case 'c': |
| 2104 |
nmode = S_IFCHR; |
| 2105 |
break;
|
| 2106 |
case 'b': |
| 2107 |
nmode = S_IFBLK; |
| 2108 |
break;
|
| 2109 |
default:
|
| 2110 |
err = -EIO; |
| 2111 |
goto out;
|
| 2112 |
} |
| 2113 |
|
| 2114 |
nmode |= perm & 0777;
|
| 2115 |
err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1,
|
| 2116 |
makedev(major, minor), nmode, &stbuf); |
| 2117 |
if (err < 0) { |
| 2118 |
goto out;
|
| 2119 |
} |
| 2120 |
err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
| 2121 |
if (err < 0) { |
| 2122 |
goto out;
|
| 2123 |
} |
| 2124 |
v9fs_path_copy(&fidp->path, &path); |
| 2125 |
} else if (perm & P9_STAT_MODE_NAMED_PIPE) { |
| 2126 |
err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1,
|
| 2127 |
0, S_IFIFO | (perm & 0777), &stbuf); |
| 2128 |
if (err < 0) { |
| 2129 |
goto out;
|
| 2130 |
} |
| 2131 |
err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
| 2132 |
if (err < 0) { |
| 2133 |
goto out;
|
| 2134 |
} |
| 2135 |
v9fs_path_copy(&fidp->path, &path); |
| 2136 |
} else if (perm & P9_STAT_MODE_SOCKET) { |
| 2137 |
err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1,
|
| 2138 |
0, S_IFSOCK | (perm & 0777), &stbuf); |
| 2139 |
if (err < 0) { |
| 2140 |
goto out;
|
| 2141 |
} |
| 2142 |
err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); |
| 2143 |
if (err < 0) { |
| 2144 |
goto out;
|
| 2145 |
} |
| 2146 |
v9fs_path_copy(&fidp->path, &path); |
| 2147 |
} else {
|
| 2148 |
err = v9fs_co_open2(pdu, fidp, &name, -1,
|
| 2149 |
omode_to_uflags(mode)|O_CREAT, perm, &stbuf); |
| 2150 |
if (err < 0) { |
| 2151 |
goto out;
|
| 2152 |
} |
| 2153 |
fidp->fid_type = P9_FID_FILE; |
| 2154 |
fidp->open_flags = omode_to_uflags(mode); |
| 2155 |
if (fidp->open_flags & O_EXCL) {
|
| 2156 |
/*
|
| 2157 |
* We let the host file system do O_EXCL check
|
| 2158 |
* We should not reclaim such fd
|
| 2159 |
*/
|
| 2160 |
fidp->flags |= FID_NON_RECLAIMABLE; |
| 2161 |
} |
| 2162 |
} |
| 2163 |
iounit = get_iounit(pdu, &fidp->path); |
| 2164 |
stat_to_qid(&stbuf, &qid); |
| 2165 |
err = pdu_marshal(pdu, offset, "Qd", &qid, iounit);
|
| 2166 |
if (err < 0) { |
| 2167 |
goto out;
|
| 2168 |
} |
| 2169 |
err += offset; |
| 2170 |
trace_v9fs_create_return(pdu->tag, pdu->id, |
| 2171 |
qid.type, qid.version, qid.path, iounit); |
| 2172 |
out:
|
| 2173 |
put_fid(pdu, fidp); |
| 2174 |
out_nofid:
|
| 2175 |
complete_pdu(pdu->s, pdu, err); |
| 2176 |
v9fs_string_free(&name); |
| 2177 |
v9fs_string_free(&extension); |
| 2178 |
v9fs_path_free(&path); |
| 2179 |
} |
| 2180 |
|
| 2181 |
static void v9fs_symlink(void *opaque) |
| 2182 |
{
|
| 2183 |
V9fsPDU *pdu = opaque; |
| 2184 |
V9fsString name; |
| 2185 |
V9fsString symname; |
| 2186 |
V9fsFidState *dfidp; |
| 2187 |
V9fsQID qid; |
| 2188 |
struct stat stbuf;
|
| 2189 |
int32_t dfid; |
| 2190 |
int err = 0; |
| 2191 |
gid_t gid; |
| 2192 |
size_t offset = 7;
|
| 2193 |
|
| 2194 |
v9fs_string_init(&name); |
| 2195 |
v9fs_string_init(&symname); |
| 2196 |
err = pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid);
|
| 2197 |
if (err < 0) { |
| 2198 |
goto out_nofid;
|
| 2199 |
} |
| 2200 |
trace_v9fs_symlink(pdu->tag, pdu->id, dfid, name.data, symname.data, gid); |
| 2201 |
|
| 2202 |
dfidp = get_fid(pdu, dfid); |
| 2203 |
if (dfidp == NULL) { |
| 2204 |
err = -EINVAL; |
| 2205 |
goto out_nofid;
|
| 2206 |
} |
| 2207 |
err = v9fs_co_symlink(pdu, dfidp, &name, symname.data, gid, &stbuf); |
| 2208 |
if (err < 0) { |
| 2209 |
goto out;
|
| 2210 |
} |
| 2211 |
stat_to_qid(&stbuf, &qid); |
| 2212 |
err = pdu_marshal(pdu, offset, "Q", &qid);
|
| 2213 |
if (err < 0) { |
| 2214 |
goto out;
|
| 2215 |
} |
| 2216 |
err += offset; |
| 2217 |
trace_v9fs_symlink_return(pdu->tag, pdu->id, |
| 2218 |
qid.type, qid.version, qid.path); |
| 2219 |
out:
|
| 2220 |
put_fid(pdu, dfidp); |
| 2221 |
out_nofid:
|
| 2222 |
complete_pdu(pdu->s, pdu, err); |
| 2223 |
v9fs_string_free(&name); |
| 2224 |
v9fs_string_free(&symname); |
| 2225 |
} |
| 2226 |
|
| 2227 |
static void v9fs_flush(void *opaque) |
| 2228 |
{
|
| 2229 |
ssize_t err; |
| 2230 |
int16_t tag; |
| 2231 |
size_t offset = 7;
|
| 2232 |
V9fsPDU *cancel_pdu; |
| 2233 |
V9fsPDU *pdu = opaque; |
| 2234 |
V9fsState *s = pdu->s; |
| 2235 |
|
| 2236 |
err = pdu_unmarshal(pdu, offset, "w", &tag);
|
| 2237 |
if (err < 0) { |
| 2238 |
complete_pdu(s, pdu, err); |
| 2239 |
return;
|
| 2240 |
} |
| 2241 |
trace_v9fs_flush(pdu->tag, pdu->id, tag); |
| 2242 |
|
| 2243 |
QLIST_FOREACH(cancel_pdu, &s->active_list, next) {
|
| 2244 |
if (cancel_pdu->tag == tag) {
|
| 2245 |
break;
|
| 2246 |
} |
| 2247 |
} |
| 2248 |
if (cancel_pdu) {
|
| 2249 |
cancel_pdu->cancelled = 1;
|
| 2250 |
/*
|
| 2251 |
* Wait for pdu to complete.
|
| 2252 |
*/
|
| 2253 |
qemu_co_queue_wait(&cancel_pdu->complete); |
| 2254 |
cancel_pdu->cancelled = 0;
|
| 2255 |
free_pdu(pdu->s, cancel_pdu); |
| 2256 |
} |
| 2257 |
complete_pdu(s, pdu, 7);
|
| 2258 |
} |
| 2259 |
|
| 2260 |
static void v9fs_link(void *opaque) |
| 2261 |
{
|
| 2262 |
V9fsPDU *pdu = opaque; |
| 2263 |
V9fsState *s = pdu->s; |
| 2264 |
int32_t dfid, oldfid; |
| 2265 |
V9fsFidState *dfidp, *oldfidp; |
| 2266 |
V9fsString name; |
| 2267 |
size_t offset = 7;
|
| 2268 |
int err = 0; |
| 2269 |
|
| 2270 |
v9fs_string_init(&name); |
| 2271 |
err = pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name);
|
| 2272 |
if (err < 0) { |
| 2273 |
goto out_nofid;
|
| 2274 |
} |
| 2275 |
trace_v9fs_link(pdu->tag, pdu->id, dfid, oldfid, name.data); |
| 2276 |
|
| 2277 |
dfidp = get_fid(pdu, dfid); |
| 2278 |
if (dfidp == NULL) { |
| 2279 |
err = -ENOENT; |
| 2280 |
goto out_nofid;
|
| 2281 |
} |
| 2282 |
|
| 2283 |
oldfidp = get_fid(pdu, oldfid); |
| 2284 |
if (oldfidp == NULL) { |
| 2285 |
err = -ENOENT; |
| 2286 |
goto out;
|
| 2287 |
} |
| 2288 |
err = v9fs_co_link(pdu, oldfidp, dfidp, &name); |
| 2289 |
if (!err) {
|
| 2290 |
err = offset; |
| 2291 |
} |
| 2292 |
out:
|
| 2293 |
put_fid(pdu, dfidp); |
| 2294 |
out_nofid:
|
| 2295 |
v9fs_string_free(&name); |
| 2296 |
complete_pdu(s, pdu, err); |
| 2297 |
} |
| 2298 |
|
| 2299 |
/* Only works with path name based fid */
|
| 2300 |
static void v9fs_remove(void *opaque) |
| 2301 |
{
|
| 2302 |
int32_t fid; |
| 2303 |
int err = 0; |
| 2304 |
size_t offset = 7;
|
| 2305 |
V9fsFidState *fidp; |
| 2306 |
V9fsPDU *pdu = opaque; |
| 2307 |
|
| 2308 |
err = pdu_unmarshal(pdu, offset, "d", &fid);
|
| 2309 |
if (err < 0) { |
| 2310 |
goto out_nofid;
|
| 2311 |
} |
| 2312 |
trace_v9fs_remove(pdu->tag, pdu->id, fid); |
| 2313 |
|
| 2314 |
fidp = get_fid(pdu, fid); |
| 2315 |
if (fidp == NULL) { |
| 2316 |
err = -EINVAL; |
| 2317 |
goto out_nofid;
|
| 2318 |
} |
| 2319 |
/* if fs driver is not path based, return EOPNOTSUPP */
|
| 2320 |
if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) {
|
| 2321 |
err = -EOPNOTSUPP; |
| 2322 |
goto out_err;
|
| 2323 |
} |
| 2324 |
/*
|
| 2325 |
* IF the file is unlinked, we cannot reopen
|
| 2326 |
* the file later. So don't reclaim fd
|
| 2327 |
*/
|
| 2328 |
err = v9fs_mark_fids_unreclaim(pdu, &fidp->path); |
| 2329 |
if (err < 0) { |
| 2330 |
goto out_err;
|
| 2331 |
} |
| 2332 |
err = v9fs_co_remove(pdu, &fidp->path); |
| 2333 |
if (!err) {
|
| 2334 |
err = offset; |
| 2335 |
} |
| 2336 |
out_err:
|
| 2337 |
/* For TREMOVE we need to clunk the fid even on failed remove */
|
| 2338 |
clunk_fid(pdu->s, fidp->fid); |
| 2339 |
put_fid(pdu, fidp); |
| 2340 |
out_nofid:
|
| 2341 |
complete_pdu(pdu->s, pdu, err); |
| 2342 |
} |
| 2343 |
|
| 2344 |
static void v9fs_unlinkat(void *opaque) |
| 2345 |
{
|
| 2346 |
int err = 0; |
| 2347 |
V9fsString name; |
| 2348 |
int32_t dfid, flags; |
| 2349 |
size_t offset = 7;
|
| 2350 |
V9fsPath path; |
| 2351 |
V9fsFidState *dfidp; |
| 2352 |
V9fsPDU *pdu = opaque; |
| 2353 |
|
| 2354 |
v9fs_string_init(&name); |
| 2355 |
err = pdu_unmarshal(pdu, offset, "dsd", &dfid, &name, &flags);
|
| 2356 |
if (err < 0) { |
| 2357 |
goto out_nofid;
|
| 2358 |
} |
| 2359 |
dfidp = get_fid(pdu, dfid); |
| 2360 |
if (dfidp == NULL) { |
| 2361 |
err = -EINVAL; |
| 2362 |
goto out_nofid;
|
| 2363 |
} |
| 2364 |
/*
|
| 2365 |
* IF the file is unlinked, we cannot reopen
|
| 2366 |
* the file later. So don't reclaim fd
|
| 2367 |
*/
|
| 2368 |
v9fs_path_init(&path); |
| 2369 |
err = v9fs_co_name_to_path(pdu, &dfidp->path, name.data, &path); |
| 2370 |
if (err < 0) { |
| 2371 |
goto out_err;
|
| 2372 |
} |
| 2373 |
err = v9fs_mark_fids_unreclaim(pdu, &path); |
| 2374 |
if (err < 0) { |
| 2375 |
goto out_err;
|
| 2376 |
} |
| 2377 |
err = v9fs_co_unlinkat(pdu, &dfidp->path, &name, flags); |
| 2378 |
if (!err) {
|
| 2379 |
err = offset; |
| 2380 |
} |
| 2381 |
out_err:
|
| 2382 |
put_fid(pdu, dfidp); |
| 2383 |
v9fs_path_free(&path); |
| 2384 |
out_nofid:
|
| 2385 |
complete_pdu(pdu->s, pdu, err); |
| 2386 |
v9fs_string_free(&name); |
| 2387 |
} |
| 2388 |
|
| 2389 |
|
| 2390 |
/* Only works with path name based fid */
|
| 2391 |
static int v9fs_complete_rename(V9fsPDU *pdu, V9fsFidState *fidp, |
| 2392 |
int32_t newdirfid, V9fsString *name) |
| 2393 |
{
|
| 2394 |
char *end;
|
| 2395 |
int err = 0; |
| 2396 |
V9fsPath new_path; |
| 2397 |
V9fsFidState *tfidp; |
| 2398 |
V9fsState *s = pdu->s; |
| 2399 |
V9fsFidState *dirfidp = NULL;
|
| 2400 |
char *old_name, *new_name;
|
| 2401 |
|
| 2402 |
v9fs_path_init(&new_path); |
| 2403 |
if (newdirfid != -1) { |
| 2404 |
dirfidp = get_fid(pdu, newdirfid); |
| 2405 |
if (dirfidp == NULL) { |
| 2406 |
err = -ENOENT; |
| 2407 |
goto out_nofid;
|
| 2408 |
} |
| 2409 |
BUG_ON(dirfidp->fid_type != P9_FID_NONE); |
| 2410 |
v9fs_co_name_to_path(pdu, &dirfidp->path, name->data, &new_path); |
| 2411 |
} else {
|
| 2412 |
old_name = fidp->path.data; |
| 2413 |
end = strrchr(old_name, '/');
|
| 2414 |
if (end) {
|
| 2415 |
end++; |
| 2416 |
} else {
|
| 2417 |
end = old_name; |
| 2418 |
} |
| 2419 |
new_name = g_malloc0(end - old_name + name->size + 1);
|
| 2420 |
strncat(new_name, old_name, end - old_name); |
| 2421 |
strncat(new_name + (end - old_name), name->data, name->size); |
| 2422 |
v9fs_co_name_to_path(pdu, NULL, new_name, &new_path);
|
| 2423 |
g_free(new_name); |
| 2424 |
} |
| 2425 |
err = v9fs_co_rename(pdu, &fidp->path, &new_path); |
| 2426 |
if (err < 0) { |
| 2427 |
goto out;
|
| 2428 |
} |
| 2429 |
/*
|
| 2430 |
* Fixup fid's pointing to the old name to
|
| 2431 |
* start pointing to the new name
|
| 2432 |
*/
|
| 2433 |
for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) {
|
| 2434 |
if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) {
|
| 2435 |
/* replace the name */
|
| 2436 |
v9fs_fix_path(&tfidp->path, &new_path, strlen(fidp->path.data)); |
| 2437 |
} |
| 2438 |
} |
| 2439 |
out:
|
| 2440 |
if (dirfidp) {
|
| 2441 |
put_fid(pdu, dirfidp); |
| 2442 |
} |
| 2443 |
v9fs_path_free(&new_path); |
| 2444 |
out_nofid:
|
| 2445 |
return err;
|
| 2446 |
} |
| 2447 |
|
| 2448 |
/* Only works with path name based fid */
|
| 2449 |
static void v9fs_rename(void *opaque) |
| 2450 |
{
|
| 2451 |
int32_t fid; |
| 2452 |
ssize_t err = 0;
|
| 2453 |
size_t offset = 7;
|
| 2454 |
V9fsString name; |
| 2455 |
int32_t newdirfid; |
| 2456 |
V9fsFidState *fidp; |
| 2457 |
V9fsPDU *pdu = opaque; |
| 2458 |
V9fsState *s = pdu->s; |
| 2459 |
|
| 2460 |
v9fs_string_init(&name); |
| 2461 |
err = pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name);
|
| 2462 |
if (err < 0) { |
| 2463 |
goto out_nofid;
|
| 2464 |
} |
| 2465 |
fidp = get_fid(pdu, fid); |
| 2466 |
if (fidp == NULL) { |
| 2467 |
err = -ENOENT; |
| 2468 |
goto out_nofid;
|
| 2469 |
} |
| 2470 |
BUG_ON(fidp->fid_type != P9_FID_NONE); |
| 2471 |
/* if fs driver is not path based, return EOPNOTSUPP */
|
| 2472 |
if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) {
|
| 2473 |
err = -EOPNOTSUPP; |
| 2474 |
goto out;
|
| 2475 |
} |
| 2476 |
v9fs_path_write_lock(s); |
| 2477 |
err = v9fs_complete_rename(pdu, fidp, newdirfid, &name); |
| 2478 |
v9fs_path_unlock(s); |
| 2479 |
if (!err) {
|
| 2480 |
err = offset; |
| 2481 |
} |
| 2482 |
out:
|
| 2483 |
put_fid(pdu, fidp); |
| 2484 |
out_nofid:
|
| 2485 |
complete_pdu(s, pdu, err); |
| 2486 |
v9fs_string_free(&name); |
| 2487 |
} |
| 2488 |
|
| 2489 |
static void v9fs_fix_fid_paths(V9fsPDU *pdu, V9fsPath *olddir, |
| 2490 |
V9fsString *old_name, V9fsPath *newdir, |
| 2491 |
V9fsString *new_name) |
| 2492 |
{
|
| 2493 |
V9fsFidState *tfidp; |
| 2494 |
V9fsPath oldpath, newpath; |
| 2495 |
V9fsState *s = pdu->s; |
| 2496 |
|
| 2497 |
|
| 2498 |
v9fs_path_init(&oldpath); |
| 2499 |
v9fs_path_init(&newpath); |
| 2500 |
v9fs_co_name_to_path(pdu, olddir, old_name->data, &oldpath); |
| 2501 |
v9fs_co_name_to_path(pdu, newdir, new_name->data, &newpath); |
| 2502 |
|
| 2503 |
/*
|
| 2504 |
* Fixup fid's pointing to the old name to
|
| 2505 |
* start pointing to the new name
|
| 2506 |
*/
|
| 2507 |
for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) {
|
| 2508 |
if (v9fs_path_is_ancestor(&oldpath, &tfidp->path)) {
|
| 2509 |
/* replace the name */
|
| 2510 |
v9fs_fix_path(&tfidp->path, &newpath, strlen(oldpath.data)); |
| 2511 |
} |
| 2512 |
} |
| 2513 |
v9fs_path_free(&oldpath); |
| 2514 |
v9fs_path_free(&newpath); |
| 2515 |
} |
| 2516 |
|
| 2517 |
static int v9fs_complete_renameat(V9fsPDU *pdu, int32_t olddirfid, |
| 2518 |
V9fsString *old_name, int32_t newdirfid, |
| 2519 |
V9fsString *new_name) |
| 2520 |
{
|
| 2521 |
int err = 0; |
| 2522 |
V9fsState *s = pdu->s; |
| 2523 |
V9fsFidState *newdirfidp = NULL, *olddirfidp = NULL; |
| 2524 |
|
| 2525 |
olddirfidp = get_fid(pdu, olddirfid); |
| 2526 |
if (olddirfidp == NULL) { |
| 2527 |
err = -ENOENT; |
| 2528 |
goto out;
|
| 2529 |
} |
| 2530 |
if (newdirfid != -1) { |
| 2531 |
newdirfidp = get_fid(pdu, newdirfid); |
| 2532 |
if (newdirfidp == NULL) { |
| 2533 |
err = -ENOENT; |
| 2534 |
goto out;
|
| 2535 |
} |
| 2536 |
} else {
|
| 2537 |
newdirfidp = get_fid(pdu, olddirfid); |
| 2538 |
} |
| 2539 |
|
| 2540 |
err = v9fs_co_renameat(pdu, &olddirfidp->path, old_name, |
| 2541 |
&newdirfidp->path, new_name); |
| 2542 |
if (err < 0) { |
| 2543 |
goto out;
|
| 2544 |
} |
| 2545 |
if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) {
|
| 2546 |
/* Only for path based fid we need to do the below fixup */
|
| 2547 |
v9fs_fix_fid_paths(pdu, &olddirfidp->path, old_name, |
| 2548 |
&newdirfidp->path, new_name); |
| 2549 |
} |
| 2550 |
out:
|
| 2551 |
if (olddirfidp) {
|
| 2552 |
put_fid(pdu, olddirfidp); |
| 2553 |
} |
| 2554 |
if (newdirfidp) {
|
| 2555 |
put_fid(pdu, newdirfidp); |
| 2556 |
} |
| 2557 |
return err;
|
| 2558 |
} |
| 2559 |
|
| 2560 |
static void v9fs_renameat(void *opaque) |
| 2561 |
{
|
| 2562 |
ssize_t err = 0;
|
| 2563 |
size_t offset = 7;
|
| 2564 |
V9fsPDU *pdu = opaque; |
| 2565 |
V9fsState *s = pdu->s; |
| 2566 |
int32_t olddirfid, newdirfid; |
| 2567 |
V9fsString old_name, new_name; |
| 2568 |
|
| 2569 |
v9fs_string_init(&old_name); |
| 2570 |
v9fs_string_init(&new_name); |
| 2571 |
err = pdu_unmarshal(pdu, offset, "dsds", &olddirfid,
|
| 2572 |
&old_name, &newdirfid, &new_name); |
| 2573 |
if (err < 0) { |
| 2574 |
goto out_err;
|
| 2575 |
} |
| 2576 |
|
| 2577 |
v9fs_path_write_lock(s); |
| 2578 |
err = v9fs_complete_renameat(pdu, olddirfid, |
| 2579 |
&old_name, newdirfid, &new_name); |
| 2580 |
v9fs_path_unlock(s); |
| 2581 |
if (!err) {
|
| 2582 |
err = offset; |
| 2583 |
} |
| 2584 |
|
| 2585 |
out_err:
|
| 2586 |
complete_pdu(s, pdu, err); |
| 2587 |
v9fs_string_free(&old_name); |
| 2588 |
v9fs_string_free(&new_name); |
| 2589 |
} |
| 2590 |
|
| 2591 |
static void v9fs_wstat(void *opaque) |
| 2592 |
{
|
| 2593 |
int32_t fid; |
| 2594 |
int err = 0; |
| 2595 |
int16_t unused; |
| 2596 |
V9fsStat v9stat; |
| 2597 |
size_t offset = 7;
|
| 2598 |
struct stat stbuf;
|
| 2599 |
V9fsFidState *fidp; |
| 2600 |
V9fsPDU *pdu = opaque; |
| 2601 |
V9fsState *s = pdu->s; |
| 2602 |
|
| 2603 |
v9fs_stat_init(&v9stat); |
| 2604 |
err = pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat);
|
| 2605 |
if (err < 0) { |
| 2606 |
goto out_nofid;
|
| 2607 |
} |
| 2608 |
trace_v9fs_wstat(pdu->tag, pdu->id, fid, |
| 2609 |
v9stat.mode, v9stat.atime, v9stat.mtime); |
| 2610 |
|
| 2611 |
fidp = get_fid(pdu, fid); |
| 2612 |
if (fidp == NULL) { |
| 2613 |
err = -EINVAL; |
| 2614 |
goto out_nofid;
|
| 2615 |
} |
| 2616 |
/* do we need to sync the file? */
|
| 2617 |
if (donttouch_stat(&v9stat)) {
|
| 2618 |
err = v9fs_co_fsync(pdu, fidp, 0);
|
| 2619 |
goto out;
|
| 2620 |
} |
| 2621 |
if (v9stat.mode != -1) { |
| 2622 |
uint32_t v9_mode; |
| 2623 |
err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); |
| 2624 |
if (err < 0) { |
| 2625 |
goto out;
|
| 2626 |
} |
| 2627 |
v9_mode = stat_to_v9mode(&stbuf); |
| 2628 |
if ((v9stat.mode & P9_STAT_MODE_TYPE_BITS) !=
|
| 2629 |
(v9_mode & P9_STAT_MODE_TYPE_BITS)) {
|
| 2630 |
/* Attempting to change the type */
|
| 2631 |
err = -EIO; |
| 2632 |
goto out;
|
| 2633 |
} |
| 2634 |
err = v9fs_co_chmod(pdu, &fidp->path, |
| 2635 |
v9mode_to_mode(v9stat.mode, |
| 2636 |
&v9stat.extension)); |
| 2637 |
if (err < 0) { |
| 2638 |
goto out;
|
| 2639 |
} |
| 2640 |
} |
| 2641 |
if (v9stat.mtime != -1 || v9stat.atime != -1) { |
| 2642 |
struct timespec times[2]; |
| 2643 |
if (v9stat.atime != -1) { |
| 2644 |
times[0].tv_sec = v9stat.atime;
|
| 2645 |
times[0].tv_nsec = 0; |
| 2646 |
} else {
|
| 2647 |
times[0].tv_nsec = UTIME_OMIT;
|
| 2648 |
} |
| 2649 |
if (v9stat.mtime != -1) { |
| 2650 |
times[1].tv_sec = v9stat.mtime;
|
| 2651 |
times[1].tv_nsec = 0; |
| 2652 |
} else {
|
| 2653 |
times[1].tv_nsec = UTIME_OMIT;
|
| 2654 |
} |
| 2655 |
err = v9fs_co_utimensat(pdu, &fidp->path, times); |
| 2656 |
if (err < 0) { |
| 2657 |
goto out;
|
| 2658 |
} |
| 2659 |
} |
| 2660 |
if (v9stat.n_gid != -1 || v9stat.n_uid != -1) { |
| 2661 |
err = v9fs_co_chown(pdu, &fidp->path, v9stat.n_uid, v9stat.n_gid); |
| 2662 |
if (err < 0) { |
| 2663 |
goto out;
|
| 2664 |
} |
| 2665 |
} |
| 2666 |
if (v9stat.name.size != 0) { |
| 2667 |
err = v9fs_complete_rename(pdu, fidp, -1, &v9stat.name);
|
| 2668 |
if (err < 0) { |
| 2669 |
goto out;
|
| 2670 |
} |
| 2671 |
} |
| 2672 |
if (v9stat.length != -1) { |
| 2673 |
err = v9fs_co_truncate(pdu, &fidp->path, v9stat.length); |
| 2674 |
if (err < 0) { |
| 2675 |
goto out;
|
| 2676 |
} |
| 2677 |
} |
| 2678 |
err = offset; |
| 2679 |
out:
|
| 2680 |
put_fid(pdu, fidp); |
| 2681 |
out_nofid:
|
| 2682 |
v9fs_stat_free(&v9stat); |
| 2683 |
complete_pdu(s, pdu, err); |
| 2684 |
} |
| 2685 |
|
| 2686 |
static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) |
| 2687 |
{
|
| 2688 |
uint32_t f_type; |
| 2689 |
uint32_t f_bsize; |
| 2690 |
uint64_t f_blocks; |
| 2691 |
uint64_t f_bfree; |
| 2692 |
uint64_t f_bavail; |
| 2693 |
uint64_t f_files; |
| 2694 |
uint64_t f_ffree; |
| 2695 |
uint64_t fsid_val; |
| 2696 |
uint32_t f_namelen; |
| 2697 |
size_t offset = 7;
|
| 2698 |
int32_t bsize_factor; |
| 2699 |
|
| 2700 |
/*
|
| 2701 |
* compute bsize factor based on host file system block size
|
| 2702 |
* and client msize
|
| 2703 |
*/
|
| 2704 |
bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; |
| 2705 |
if (!bsize_factor) {
|
| 2706 |
bsize_factor = 1;
|
| 2707 |
} |
| 2708 |
f_type = stbuf->f_type; |
| 2709 |
f_bsize = stbuf->f_bsize; |
| 2710 |
f_bsize *= bsize_factor; |
| 2711 |
/*
|
| 2712 |
* f_bsize is adjusted(multiplied) by bsize factor, so we need to
|
| 2713 |
* adjust(divide) the number of blocks, free blocks and available
|
| 2714 |
* blocks by bsize factor
|
| 2715 |
*/
|
| 2716 |
f_blocks = stbuf->f_blocks/bsize_factor; |
| 2717 |
f_bfree = stbuf->f_bfree/bsize_factor; |
| 2718 |
f_bavail = stbuf->f_bavail/bsize_factor; |
| 2719 |
f_files = stbuf->f_files; |
| 2720 |
f_ffree = stbuf->f_ffree; |
| 2721 |
fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | |
| 2722 |
(unsigned long long)stbuf->f_fsid.__val[1] << 32; |
| 2723 |
f_namelen = stbuf->f_namelen; |
| 2724 |
|
| 2725 |
return pdu_marshal(pdu, offset, "ddqqqqqqd", |
| 2726 |
f_type, f_bsize, f_blocks, f_bfree, |
| 2727 |
f_bavail, f_files, f_ffree, |
| 2728 |
fsid_val, f_namelen); |
| 2729 |
} |
| 2730 |
|
| 2731 |
static void v9fs_statfs(void *opaque) |
| 2732 |
{
|
| 2733 |
int32_t fid; |
| 2734 |
ssize_t retval = 0;
|
| 2735 |
size_t offset = 7;
|
| 2736 |
V9fsFidState *fidp; |
| 2737 |
struct statfs stbuf;
|
| 2738 |
V9fsPDU *pdu = opaque; |
| 2739 |
V9fsState *s = pdu->s; |
| 2740 |
|
| 2741 |
retval = pdu_unmarshal(pdu, offset, "d", &fid);
|
| 2742 |
if (retval < 0) { |
| 2743 |
goto out_nofid;
|
| 2744 |
} |
| 2745 |
fidp = get_fid(pdu, fid); |
| 2746 |
if (fidp == NULL) { |
| 2747 |
retval = -ENOENT; |
| 2748 |
goto out_nofid;
|
| 2749 |
} |
| 2750 |
retval = v9fs_co_statfs(pdu, &fidp->path, &stbuf); |
| 2751 |
if (retval < 0) { |
| 2752 |
goto out;
|
| 2753 |
} |
| 2754 |
retval = v9fs_fill_statfs(s, pdu, &stbuf); |
| 2755 |
if (retval < 0) { |
| 2756 |
goto out;
|
| 2757 |
} |
| 2758 |
retval += offset; |
| 2759 |
out:
|
| 2760 |
put_fid(pdu, fidp); |
| 2761 |
out_nofid:
|
| 2762 |
complete_pdu(s, pdu, retval); |
| 2763 |
} |
| 2764 |
|
| 2765 |
static void v9fs_mknod(void *opaque) |
| 2766 |
{
|
| 2767 |
|
| 2768 |
int mode;
|
| 2769 |
gid_t gid; |
| 2770 |
int32_t fid; |
| 2771 |
V9fsQID qid; |
| 2772 |
int err = 0; |
| 2773 |
int major, minor;
|
| 2774 |
size_t offset = 7;
|
| 2775 |
V9fsString name; |
| 2776 |
struct stat stbuf;
|
| 2777 |
V9fsFidState *fidp; |
| 2778 |
V9fsPDU *pdu = opaque; |
| 2779 |
V9fsState *s = pdu->s; |
| 2780 |
|
| 2781 |
v9fs_string_init(&name); |
| 2782 |
err = pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode,
|
| 2783 |
&major, &minor, &gid); |
| 2784 |
if (err < 0) { |
| 2785 |
goto out_nofid;
|
| 2786 |
} |
| 2787 |
trace_v9fs_mknod(pdu->tag, pdu->id, fid, mode, major, minor); |
| 2788 |
|
| 2789 |
fidp = get_fid(pdu, fid); |
| 2790 |
if (fidp == NULL) { |
| 2791 |
err = -ENOENT; |
| 2792 |
goto out_nofid;
|
| 2793 |
} |
| 2794 |
err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, gid, |
| 2795 |
makedev(major, minor), mode, &stbuf); |
| 2796 |
if (err < 0) { |
| 2797 |
goto out;
|
| 2798 |
} |
| 2799 |
stat_to_qid(&stbuf, &qid); |
| 2800 |
err = pdu_marshal(pdu, offset, "Q", &qid);
|
| 2801 |
if (err < 0) { |
| 2802 |
goto out;
|
| 2803 |
} |
| 2804 |
err += offset; |
| 2805 |
trace_v9fs_mknod_return(pdu->tag, pdu->id, |
| 2806 |
qid.type, qid.version, qid.path); |
| 2807 |
out:
|
| 2808 |
put_fid(pdu, fidp); |
| 2809 |
out_nofid:
|
| 2810 |
complete_pdu(s, pdu, err); |
| 2811 |
v9fs_string_free(&name); |
| 2812 |
} |
| 2813 |
|
| 2814 |
/*
|
| 2815 |
* Implement posix byte range locking code
|
| 2816 |
* Server side handling of locking code is very simple, because 9p server in
|
| 2817 |
* QEMU can handle only one client. And most of the lock handling
|
| 2818 |
* (like conflict, merging) etc is done by the VFS layer itself, so no need to
|
| 2819 |
* do any thing in * qemu 9p server side lock code path.
|
| 2820 |
* So when a TLOCK request comes, always return success
|
| 2821 |
*/
|
| 2822 |
static void v9fs_lock(void *opaque) |
| 2823 |
{
|
| 2824 |
int8_t status; |
| 2825 |
V9fsFlock flock; |
| 2826 |
size_t offset = 7;
|
| 2827 |
struct stat stbuf;
|
| 2828 |
V9fsFidState *fidp; |
| 2829 |
int32_t fid, err = 0;
|
| 2830 |
V9fsPDU *pdu = opaque; |
| 2831 |
V9fsState *s = pdu->s; |
| 2832 |
|
| 2833 |
status = P9_LOCK_ERROR; |
| 2834 |
v9fs_string_init(&flock.client_id); |
| 2835 |
err = pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock.type,
|
| 2836 |
&flock.flags, &flock.start, &flock.length, |
| 2837 |
&flock.proc_id, &flock.client_id); |
| 2838 |
if (err < 0) { |
| 2839 |
goto out_nofid;
|
| 2840 |
} |
| 2841 |
trace_v9fs_lock(pdu->tag, pdu->id, fid, |
| 2842 |
flock.type, flock.start, flock.length); |
| 2843 |
|
| 2844 |
|
| 2845 |
/* We support only block flag now (that too ignored currently) */
|
| 2846 |
if (flock.flags & ~P9_LOCK_FLAGS_BLOCK) {
|
| 2847 |
err = -EINVAL; |
| 2848 |
goto out_nofid;
|
| 2849 |
} |
| 2850 |
fidp = get_fid(pdu, fid); |
| 2851 |
if (fidp == NULL) { |
| 2852 |
err = -ENOENT; |
| 2853 |
goto out_nofid;
|
| 2854 |
} |
| 2855 |
err = v9fs_co_fstat(pdu, fidp, &stbuf); |
| 2856 |
if (err < 0) { |
| 2857 |
goto out;
|
| 2858 |
} |
| 2859 |
status = P9_LOCK_SUCCESS; |
| 2860 |
out:
|
| 2861 |
put_fid(pdu, fidp); |
| 2862 |
out_nofid:
|
| 2863 |
err = pdu_marshal(pdu, offset, "b", status);
|
| 2864 |
if (err > 0) { |
| 2865 |
err += offset; |
| 2866 |
} |
| 2867 |
trace_v9fs_lock_return(pdu->tag, pdu->id, status); |
| 2868 |
complete_pdu(s, pdu, err); |
| 2869 |
v9fs_string_free(&flock.client_id); |
| 2870 |
} |
| 2871 |
|
| 2872 |
/*
|
| 2873 |
* When a TGETLOCK request comes, always return success because all lock
|
| 2874 |
* handling is done by client's VFS layer.
|
| 2875 |
*/
|
| 2876 |
static void v9fs_getlock(void *opaque) |
| 2877 |
{
|
| 2878 |
size_t offset = 7;
|
| 2879 |
struct stat stbuf;
|
| 2880 |
V9fsFidState *fidp; |
| 2881 |
V9fsGetlock glock; |
| 2882 |
int32_t fid, err = 0;
|
| 2883 |
V9fsPDU *pdu = opaque; |
| 2884 |
V9fsState *s = pdu->s; |
| 2885 |
|
| 2886 |
v9fs_string_init(&glock.client_id); |
| 2887 |
err = pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock.type,
|
| 2888 |
&glock.start, &glock.length, &glock.proc_id, |
| 2889 |
&glock.client_id); |
| 2890 |
if (err < 0) { |
| 2891 |
goto out_nofid;
|
| 2892 |
} |
| 2893 |
trace_v9fs_getlock(pdu->tag, pdu->id, fid, |
| 2894 |
glock.type, glock.start, glock.length); |
| 2895 |
|
| 2896 |
fidp = get_fid(pdu, fid); |
| 2897 |
if (fidp == NULL) { |
| 2898 |
err = -ENOENT; |
| 2899 |
goto out_nofid;
|
| 2900 |
} |
| 2901 |
err = v9fs_co_fstat(pdu, fidp, &stbuf); |
| 2902 |
if (err < 0) { |
| 2903 |
goto out;
|
| 2904 |
} |
| 2905 |
glock.type = P9_LOCK_TYPE_UNLCK; |
| 2906 |
err = pdu_marshal(pdu, offset, "bqqds", glock.type,
|
| 2907 |
glock.start, glock.length, glock.proc_id, |
| 2908 |
&glock.client_id); |
| 2909 |
if (err < 0) { |
| 2910 |
goto out;
|
| 2911 |
} |
| 2912 |
err += offset; |
| 2913 |
trace_v9fs_getlock_return(pdu->tag, pdu->id, glock.type, glock.start, |
| 2914 |
glock.length, glock.proc_id); |
| 2915 |
out:
|
| 2916 |
put_fid(pdu, fidp); |
| 2917 |
out_nofid:
|
| 2918 |
complete_pdu(s, pdu, err); |
| 2919 |
v9fs_string_free(&glock.client_id); |
| 2920 |
} |
| 2921 |
|
| 2922 |
static void v9fs_mkdir(void *opaque) |
| 2923 |
{
|
| 2924 |
V9fsPDU *pdu = opaque; |
| 2925 |
size_t offset = 7;
|
| 2926 |
int32_t fid; |
| 2927 |
struct stat stbuf;
|
| 2928 |
V9fsQID qid; |
| 2929 |
V9fsString name; |
| 2930 |
V9fsFidState *fidp; |
| 2931 |
gid_t gid; |
| 2932 |
int mode;
|
| 2933 |
int err = 0; |
| 2934 |
|
| 2935 |
v9fs_string_init(&name); |
| 2936 |
err = pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid);
|
| 2937 |
if (err < 0) { |
| 2938 |
goto out_nofid;
|
| 2939 |
} |
| 2940 |
trace_v9fs_mkdir(pdu->tag, pdu->id, fid, name.data, mode, gid); |
| 2941 |
|
| 2942 |
fidp = get_fid(pdu, fid); |
| 2943 |
if (fidp == NULL) { |
| 2944 |
err = -ENOENT; |
| 2945 |
goto out_nofid;
|
| 2946 |
} |
| 2947 |
err = v9fs_co_mkdir(pdu, fidp, &name, mode, fidp->uid, gid, &stbuf); |
| 2948 |
if (err < 0) { |
| 2949 |
goto out;
|
| 2950 |
} |
| 2951 |
stat_to_qid(&stbuf, &qid); |
| 2952 |
err = pdu_marshal(pdu, offset, "Q", &qid);
|
| 2953 |
if (err < 0) { |
| 2954 |
goto out;
|
| 2955 |
} |
| 2956 |
err += offset; |
| 2957 |
trace_v9fs_mkdir_return(pdu->tag, pdu->id, |
| 2958 |
qid.type, qid.version, qid.path, err); |
| 2959 |
out:
|
| 2960 |
put_fid(pdu, fidp); |
| 2961 |
out_nofid:
|
| 2962 |
complete_pdu(pdu->s, pdu, err); |
| 2963 |
v9fs_string_free(&name); |
| 2964 |
} |
| 2965 |
|
| 2966 |
static void v9fs_xattrwalk(void *opaque) |
| 2967 |
{
|
| 2968 |
int64_t size; |
| 2969 |
V9fsString name; |
| 2970 |
ssize_t err = 0;
|
| 2971 |
size_t offset = 7;
|
| 2972 |
int32_t fid, newfid; |
| 2973 |
V9fsFidState *file_fidp; |
| 2974 |
V9fsFidState *xattr_fidp = NULL;
|
| 2975 |
V9fsPDU *pdu = opaque; |
| 2976 |
V9fsState *s = pdu->s; |
| 2977 |
|
| 2978 |
v9fs_string_init(&name); |
| 2979 |
err = pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name);
|
| 2980 |
if (err < 0) { |
| 2981 |
goto out_nofid;
|
| 2982 |
} |
| 2983 |
trace_v9fs_xattrwalk(pdu->tag, pdu->id, fid, newfid, name.data); |
| 2984 |
|
| 2985 |
file_fidp = get_fid(pdu, fid); |
| 2986 |
if (file_fidp == NULL) { |
| 2987 |
err = -ENOENT; |
| 2988 |
goto out_nofid;
|
| 2989 |
} |
| 2990 |
xattr_fidp = alloc_fid(s, newfid); |
| 2991 |
if (xattr_fidp == NULL) { |
| 2992 |
err = -EINVAL; |
| 2993 |
goto out;
|
| 2994 |
} |
| 2995 |
v9fs_path_copy(&xattr_fidp->path, &file_fidp->path); |
| 2996 |
if (name.data == NULL) { |
| 2997 |
/*
|
| 2998 |
* listxattr request. Get the size first
|
| 2999 |
*/
|
| 3000 |
size = v9fs_co_llistxattr(pdu, &xattr_fidp->path, NULL, 0); |
| 3001 |
if (size < 0) { |
| 3002 |
err = size; |
| 3003 |
clunk_fid(s, xattr_fidp->fid); |
| 3004 |
goto out;
|
| 3005 |
} |
| 3006 |
/*
|
| 3007 |
* Read the xattr value
|
| 3008 |
*/
|
| 3009 |
xattr_fidp->fs.xattr.len = size; |
| 3010 |
xattr_fidp->fid_type = P9_FID_XATTR; |
| 3011 |
xattr_fidp->fs.xattr.copied_len = -1;
|
| 3012 |
if (size) {
|
| 3013 |
xattr_fidp->fs.xattr.value = g_malloc(size); |
| 3014 |
err = v9fs_co_llistxattr(pdu, &xattr_fidp->path, |
| 3015 |
xattr_fidp->fs.xattr.value, |
| 3016 |
xattr_fidp->fs.xattr.len); |
| 3017 |
if (err < 0) { |
| 3018 |
clunk_fid(s, xattr_fidp->fid); |
| 3019 |
goto out;
|
| 3020 |
} |
| 3021 |
} |
| 3022 |
err = pdu_marshal(pdu, offset, "q", size);
|
| 3023 |
if (err < 0) { |
| 3024 |
goto out;
|
| 3025 |
} |
| 3026 |
err += offset; |
| 3027 |
} else {
|
| 3028 |
/*
|
| 3029 |
* specific xattr fid. We check for xattr
|
| 3030 |
* presence also collect the xattr size
|
| 3031 |
*/
|
| 3032 |
size = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, |
| 3033 |
&name, NULL, 0); |
| 3034 |
if (size < 0) { |
| 3035 |
err = size; |
| 3036 |
clunk_fid(s, xattr_fidp->fid); |
| 3037 |
goto out;
|
| 3038 |
} |
| 3039 |
/*
|
| 3040 |
* Read the xattr value
|
| 3041 |
*/
|
| 3042 |
xattr_fidp->fs.xattr.len = size; |
| 3043 |
xattr_fidp->fid_type = P9_FID_XATTR; |
| 3044 |
xattr_fidp->fs.xattr.copied_len = -1;
|
| 3045 |
if (size) {
|
| 3046 |
xattr_fidp->fs.xattr.value = g_malloc(size); |
| 3047 |
err = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, |
| 3048 |
&name, xattr_fidp->fs.xattr.value, |
| 3049 |
xattr_fidp->fs.xattr.len); |
| 3050 |
if (err < 0) { |
| 3051 |
clunk_fid(s, xattr_fidp->fid); |
| 3052 |
goto out;
|
| 3053 |
} |
| 3054 |
} |
| 3055 |
err = pdu_marshal(pdu, offset, "q", size);
|
| 3056 |
if (err < 0) { |
| 3057 |
goto out;
|
| 3058 |
} |
| 3059 |
err += offset; |
| 3060 |
} |
| 3061 |
trace_v9fs_xattrwalk_return(pdu->tag, pdu->id, size); |
| 3062 |
out:
|
| 3063 |
put_fid(pdu, file_fidp); |
| 3064 |
if (xattr_fidp) {
|
| 3065 |
put_fid(pdu, xattr_fidp); |
| 3066 |
} |
| 3067 |
out_nofid:
|
| 3068 |
complete_pdu(s, pdu, err); |
| 3069 |
v9fs_string_free(&name); |
| 3070 |
} |
| 3071 |
|
| 3072 |
static void v9fs_xattrcreate(void *opaque) |
| 3073 |
{
|
| 3074 |
int flags;
|
| 3075 |
int32_t fid; |
| 3076 |
int64_t size; |
| 3077 |
ssize_t err = 0;
|
| 3078 |
V9fsString name; |
| 3079 |
size_t offset = 7;
|
| 3080 |
V9fsFidState *file_fidp; |
| 3081 |
V9fsFidState *xattr_fidp; |
| 3082 |
V9fsPDU *pdu = opaque; |
| 3083 |
V9fsState *s = pdu->s; |
| 3084 |
|
| 3085 |
v9fs_string_init(&name); |
| 3086 |
err = pdu_unmarshal(pdu, offset, "dsqd", &fid, &name, &size, &flags);
|
| 3087 |
if (err < 0) { |
| 3088 |
goto out_nofid;
|
| 3089 |
} |
| 3090 |
trace_v9fs_xattrcreate(pdu->tag, pdu->id, fid, name.data, size, flags); |
| 3091 |
|
| 3092 |
file_fidp = get_fid(pdu, fid); |
| 3093 |
if (file_fidp == NULL) { |
| 3094 |
err = -EINVAL; |
| 3095 |
goto out_nofid;
|
| 3096 |
} |
| 3097 |
/* Make the file fid point to xattr */
|
| 3098 |
xattr_fidp = file_fidp; |
| 3099 |
xattr_fidp->fid_type = P9_FID_XATTR; |
| 3100 |
xattr_fidp->fs.xattr.copied_len = 0;
|
| 3101 |
xattr_fidp->fs.xattr.len = size; |
| 3102 |
xattr_fidp->fs.xattr.flags = flags; |
| 3103 |
v9fs_string_init(&xattr_fidp->fs.xattr.name); |
| 3104 |
v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); |
| 3105 |
xattr_fidp->fs.xattr.value = g_malloc(size); |
| 3106 |
err = offset; |
| 3107 |
put_fid(pdu, file_fidp); |
| 3108 |
out_nofid:
|
| 3109 |
complete_pdu(s, pdu, err); |
| 3110 |
v9fs_string_free(&name); |
| 3111 |
} |
| 3112 |
|
| 3113 |
static void v9fs_readlink(void *opaque) |
| 3114 |
{
|
| 3115 |
V9fsPDU *pdu = opaque; |
| 3116 |
size_t offset = 7;
|
| 3117 |
V9fsString target; |
| 3118 |
int32_t fid; |
| 3119 |
int err = 0; |
| 3120 |
V9fsFidState *fidp; |
| 3121 |
|
| 3122 |
err = pdu_unmarshal(pdu, offset, "d", &fid);
|
| 3123 |
if (err < 0) { |
| 3124 |
goto out_nofid;
|
| 3125 |
} |
| 3126 |
trace_v9fs_readlink(pdu->tag, pdu->id, fid); |
| 3127 |
fidp = get_fid(pdu, fid); |
| 3128 |
if (fidp == NULL) { |
| 3129 |
err = -ENOENT; |
| 3130 |
goto out_nofid;
|
| 3131 |
} |
| 3132 |
|
| 3133 |
v9fs_string_init(&target); |
| 3134 |
err = v9fs_co_readlink(pdu, &fidp->path, &target); |
| 3135 |
if (err < 0) { |
| 3136 |
goto out;
|
| 3137 |
} |
| 3138 |
err = pdu_marshal(pdu, offset, "s", &target);
|
| 3139 |
if (err < 0) { |
| 3140 |
v9fs_string_free(&target); |
| 3141 |
goto out;
|
| 3142 |
} |
| 3143 |
err += offset; |
| 3144 |
trace_v9fs_readlink_return(pdu->tag, pdu->id, target.data); |
| 3145 |
v9fs_string_free(&target); |
| 3146 |
out:
|
| 3147 |
put_fid(pdu, fidp); |
| 3148 |
out_nofid:
|
| 3149 |
complete_pdu(pdu->s, pdu, err); |
| 3150 |
} |
| 3151 |
|
| 3152 |
static CoroutineEntry *pdu_co_handlers[] = {
|
| 3153 |
[P9_TREADDIR] = v9fs_readdir, |
| 3154 |
[P9_TSTATFS] = v9fs_statfs, |
| 3155 |
[P9_TGETATTR] = v9fs_getattr, |
| 3156 |
[P9_TSETATTR] = v9fs_setattr, |
| 3157 |
[P9_TXATTRWALK] = v9fs_xattrwalk, |
| 3158 |
[P9_TXATTRCREATE] = v9fs_xattrcreate, |
| 3159 |
[P9_TMKNOD] = v9fs_mknod, |
| 3160 |
[P9_TRENAME] = v9fs_rename, |
| 3161 |
[P9_TLOCK] = v9fs_lock, |
| 3162 |
[P9_TGETLOCK] = v9fs_getlock, |
| 3163 |
[P9_TRENAMEAT] = v9fs_renameat, |
| 3164 |
[P9_TREADLINK] = v9fs_readlink, |
| 3165 |
[P9_TUNLINKAT] = v9fs_unlinkat, |
| 3166 |
[P9_TMKDIR] = v9fs_mkdir, |
| 3167 |
[P9_TVERSION] = v9fs_version, |
| 3168 |
[P9_TLOPEN] = v9fs_open, |
| 3169 |
[P9_TATTACH] = v9fs_attach, |
| 3170 |
[P9_TSTAT] = v9fs_stat, |
| 3171 |
[P9_TWALK] = v9fs_walk, |
| 3172 |
[P9_TCLUNK] = v9fs_clunk, |
| 3173 |
[P9_TFSYNC] = v9fs_fsync, |
| 3174 |
[P9_TOPEN] = v9fs_open, |
| 3175 |
[P9_TREAD] = v9fs_read, |
| 3176 |
#if 0
|
| 3177 |
[P9_TAUTH] = v9fs_auth,
|
| 3178 |
#endif
|
| 3179 |
[P9_TFLUSH] = v9fs_flush, |
| 3180 |
[P9_TLINK] = v9fs_link, |
| 3181 |
[P9_TSYMLINK] = v9fs_symlink, |
| 3182 |
[P9_TCREATE] = v9fs_create, |
| 3183 |
[P9_TLCREATE] = v9fs_lcreate, |
| 3184 |
[P9_TWRITE] = v9fs_write, |
| 3185 |
[P9_TWSTAT] = v9fs_wstat, |
| 3186 |
[P9_TREMOVE] = v9fs_remove, |
| 3187 |
}; |
| 3188 |
|
| 3189 |
static void v9fs_op_not_supp(void *opaque) |
| 3190 |
{
|
| 3191 |
V9fsPDU *pdu = opaque; |
| 3192 |
complete_pdu(pdu->s, pdu, -EOPNOTSUPP); |
| 3193 |
} |
| 3194 |
|
| 3195 |
static void v9fs_fs_ro(void *opaque) |
| 3196 |
{
|
| 3197 |
V9fsPDU *pdu = opaque; |
| 3198 |
complete_pdu(pdu->s, pdu, -EROFS); |
| 3199 |
} |
| 3200 |
|
| 3201 |
static inline bool is_read_only_op(V9fsPDU *pdu) |
| 3202 |
{
|
| 3203 |
switch (pdu->id) {
|
| 3204 |
case P9_TREADDIR:
|
| 3205 |
case P9_TSTATFS:
|
| 3206 |
case P9_TGETATTR:
|
| 3207 |
case P9_TXATTRWALK:
|
| 3208 |
case P9_TLOCK:
|
| 3209 |
case P9_TGETLOCK:
|
| 3210 |
case P9_TREADLINK:
|
| 3211 |
case P9_TVERSION:
|
| 3212 |
case P9_TLOPEN:
|
| 3213 |
case P9_TATTACH:
|
| 3214 |
case P9_TSTAT:
|
| 3215 |
case P9_TWALK:
|
| 3216 |
case P9_TCLUNK:
|
| 3217 |
case P9_TFSYNC:
|
| 3218 |
case P9_TOPEN:
|
| 3219 |
case P9_TREAD:
|
| 3220 |
case P9_TAUTH:
|
| 3221 |
case P9_TFLUSH:
|
| 3222 |
return 1; |
| 3223 |
default:
|
| 3224 |
return 0; |
| 3225 |
} |
| 3226 |
} |
| 3227 |
|
| 3228 |
static void submit_pdu(V9fsState *s, V9fsPDU *pdu) |
| 3229 |
{
|
| 3230 |
Coroutine *co; |
| 3231 |
CoroutineEntry *handler; |
| 3232 |
|
| 3233 |
if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) ||
|
| 3234 |
(pdu_co_handlers[pdu->id] == NULL)) {
|
| 3235 |
handler = v9fs_op_not_supp; |
| 3236 |
} else {
|
| 3237 |
handler = pdu_co_handlers[pdu->id]; |
| 3238 |
} |
| 3239 |
|
| 3240 |
if (is_ro_export(&s->ctx) && !is_read_only_op(pdu)) {
|
| 3241 |
handler = v9fs_fs_ro; |
| 3242 |
} |
| 3243 |
co = qemu_coroutine_create(handler); |
| 3244 |
qemu_coroutine_enter(co, pdu); |
| 3245 |
} |
| 3246 |
|
| 3247 |
void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
|
| 3248 |
{
|
| 3249 |
V9fsState *s = (V9fsState *)vdev; |
| 3250 |
V9fsPDU *pdu; |
| 3251 |
ssize_t len; |
| 3252 |
|
| 3253 |
while ((pdu = alloc_pdu(s)) &&
|
| 3254 |
(len = virtqueue_pop(vq, &pdu->elem)) != 0) {
|
| 3255 |
uint8_t *ptr; |
| 3256 |
pdu->s = s; |
| 3257 |
BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); |
| 3258 |
BUG_ON(pdu->elem.out_sg[0].iov_len < 7); |
| 3259 |
|
| 3260 |
ptr = pdu->elem.out_sg[0].iov_base;
|
| 3261 |
|
| 3262 |
pdu->size = le32_to_cpu(*(uint32_t *)ptr); |
| 3263 |
pdu->id = ptr[4];
|
| 3264 |
pdu->tag = le16_to_cpu(*(uint16_t *)(ptr + 5));
|
| 3265 |
qemu_co_queue_init(&pdu->complete); |
| 3266 |
submit_pdu(s, pdu); |
| 3267 |
} |
| 3268 |
free_pdu(s, pdu); |
| 3269 |
} |
| 3270 |
|
| 3271 |
static void __attribute__((__constructor__)) virtio_9p_set_fd_limit(void) |
| 3272 |
{
|
| 3273 |
struct rlimit rlim;
|
| 3274 |
if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) { |
| 3275 |
fprintf(stderr, "Failed to get the resource limit\n");
|
| 3276 |
exit(1);
|
| 3277 |
} |
| 3278 |
open_fd_hw = rlim.rlim_cur - MIN(400, rlim.rlim_cur/3); |
| 3279 |
open_fd_rc = rlim.rlim_cur/2;
|
| 3280 |
} |