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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.h" |
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#include "hw/pc.h" |
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#include "qemu_socket.h" |
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#include "hw/virtio-pci.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-debug.h" |
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#include "virtio-9p-xattr.h" |
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#include "virtio-9p-coth.h" |
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int debug_9p_pdu;
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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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static int omode_to_uflags(int8_t mode) |
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{ |
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int ret = 0; |
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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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if (mode & Otrunc) {
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ret |= O_TRUNC; |
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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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if (mode & Oexcl) {
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ret |= O_EXCL; |
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} |
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return ret;
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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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static int v9fs_do_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf) |
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{ |
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return s->ops->lstat(&s->ctx, path->data, stbuf);
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} |
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static int v9fs_do_close(V9fsState *s, int fd) |
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{ |
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return s->ops->close(&s->ctx, fd);
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} |
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static int v9fs_do_closedir(V9fsState *s, DIR *dir) |
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{ |
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return s->ops->closedir(&s->ctx, dir);
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} |
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static int v9fs_do_open(V9fsState *s, V9fsString *path, int flags) |
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{ |
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return s->ops->open(&s->ctx, path->data, flags);
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} |
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static DIR *v9fs_do_opendir(V9fsState *s, V9fsString *path)
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{ |
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return s->ops->opendir(&s->ctx, path->data);
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} |
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static void v9fs_do_rewinddir(V9fsState *s, DIR *dir) |
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{ |
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return s->ops->rewinddir(&s->ctx, dir);
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} |
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static off_t v9fs_do_telldir(V9fsState *s, DIR *dir)
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{ |
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return s->ops->telldir(&s->ctx, dir);
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} |
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static void v9fs_do_seekdir(V9fsState *s, DIR *dir, off_t off) |
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{ |
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return s->ops->seekdir(&s->ctx, dir, off);
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} |
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static int v9fs_do_preadv(V9fsState *s, int fd, const struct iovec *iov, |
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int iovcnt, int64_t offset)
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{ |
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return s->ops->preadv(&s->ctx, fd, iov, iovcnt, offset);
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} |
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static int v9fs_do_pwritev(V9fsState *s, int fd, const struct iovec *iov, |
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int iovcnt, int64_t offset)
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{ |
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return s->ops->pwritev(&s->ctx, fd, iov, iovcnt, offset);
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} |
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static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode) |
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{ |
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FsCred cred; |
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cred_init(&cred); |
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cred.fc_mode = mode; |
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return s->ops->chmod(&s->ctx, path->data, &cred);
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} |
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static int v9fs_do_mknod(V9fsState *s, char *name, |
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mode_t mode, dev_t dev, uid_t uid, gid_t gid) |
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{ |
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FsCred cred; |
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cred_init(&cred); |
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cred.fc_uid = uid; |
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cred.fc_gid = gid; |
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cred.fc_mode = mode; |
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cred.fc_rdev = dev; |
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return s->ops->mknod(&s->ctx, name, &cred);
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} |
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static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf) |
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{ |
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return s->ops->fstat(&s->ctx, fd, stbuf);
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} |
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static int v9fs_do_open2(V9fsState *s, char *fullname, uid_t uid, gid_t gid, |
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int flags, int mode) |
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{ |
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FsCred cred; |
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cred_init(&cred); |
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cred.fc_uid = uid; |
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cred.fc_gid = gid; |
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cred.fc_mode = mode & 07777;
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return s->ops->open2(&s->ctx, fullname, flags, &cred);
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} |
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static int v9fs_do_symlink(V9fsState *s, V9fsFidState *fidp, |
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const char *oldpath, const char *newpath, gid_t gid) |
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{ |
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FsCred cred; |
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cred_init(&cred); |
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cred.fc_uid = fidp->uid; |
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cred.fc_gid = gid; |
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cred.fc_mode = 0777;
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return s->ops->symlink(&s->ctx, oldpath, newpath, &cred);
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} |
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static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath) |
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{ |
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return s->ops->link(&s->ctx, oldpath->data, newpath->data);
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} |
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static int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size) |
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{ |
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return s->ops->truncate(&s->ctx, path->data, size);
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} |
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static int v9fs_do_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid) |
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{ |
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FsCred cred; |
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cred_init(&cred); |
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cred.fc_uid = uid; |
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cred.fc_gid = gid; |
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return s->ops->chown(&s->ctx, path->data, &cred);
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} |
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static int v9fs_do_utimensat(V9fsState *s, V9fsString *path, |
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const struct timespec times[2]) |
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{ |
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return s->ops->utimensat(&s->ctx, path->data, times);
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} |
207 |
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static int v9fs_do_fsync(V9fsState *s, int fd, int datasync) |
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{ |
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return s->ops->fsync(&s->ctx, fd, datasync);
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} |
212 |
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static int v9fs_do_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf) |
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{ |
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return s->ops->statfs(&s->ctx, path->data, stbuf);
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} |
217 |
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static int v9fs_do_lsetxattr(V9fsState *s, V9fsString *path, |
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V9fsString *xattr_name, |
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void *value, size_t size, int flags) |
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{ |
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return s->ops->lsetxattr(&s->ctx, path->data,
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xattr_name->data, value, size, flags); |
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} |
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static int v9fs_do_lremovexattr(V9fsState *s, V9fsString *path, |
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V9fsString *xattr_name) |
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{ |
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return s->ops->lremovexattr(&s->ctx, path->data,
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xattr_name->data); |
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} |
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static void v9fs_string_init(V9fsString *str) |
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{ |
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str->data = NULL;
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str->size = 0;
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} |
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static void v9fs_string_free(V9fsString *str) |
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{ |
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g_free(str->data); |
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str->data = NULL;
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str->size = 0;
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} |
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static void v9fs_string_null(V9fsString *str) |
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{ |
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v9fs_string_free(str); |
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} |
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static int number_to_string(void *arg, char type) |
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{ |
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unsigned int ret = 0; |
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switch (type) {
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case 'u': { |
258 |
unsigned int num = *(unsigned int *)arg; |
259 |
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do {
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ret++; |
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num = num/10;
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} while (num);
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break;
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} |
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case 'U': { |
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unsigned long num = *(unsigned long *)arg; |
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do {
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ret++; |
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num = num/10;
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} while (num);
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break;
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} |
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default:
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printf("Number_to_string: Unknown number format\n");
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return -1; |
277 |
} |
278 |
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return ret;
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} |
281 |
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static int GCC_FMT_ATTR(2, 0) |
283 |
v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap) |
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{ |
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va_list ap2; |
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char *iter = (char *)fmt; |
287 |
int len = 0; |
288 |
int nr_args = 0; |
289 |
char *arg_char_ptr;
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unsigned int arg_uint; |
291 |
unsigned long arg_ulong; |
292 |
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/* Find the number of %'s that denotes an argument */
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for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { |
295 |
nr_args++; |
296 |
iter++; |
297 |
} |
298 |
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len = strlen(fmt) - 2*nr_args;
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300 |
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if (!nr_args) {
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goto alloc_print;
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} |
304 |
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va_copy(ap2, ap); |
306 |
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iter = (char *)fmt;
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308 |
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/* Now parse the format string */
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for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { |
311 |
iter++; |
312 |
switch (*iter) {
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313 |
case 'u': |
314 |
arg_uint = va_arg(ap2, unsigned int); |
315 |
len += number_to_string((void *)&arg_uint, 'u'); |
316 |
break;
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317 |
case 'l': |
318 |
if (*++iter == 'u') { |
319 |
arg_ulong = va_arg(ap2, unsigned long); |
320 |
len += number_to_string((void *)&arg_ulong, 'U'); |
321 |
} else {
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322 |
return -1; |
323 |
} |
324 |
break;
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325 |
case 's': |
326 |
arg_char_ptr = va_arg(ap2, char *);
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327 |
len += strlen(arg_char_ptr); |
328 |
break;
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329 |
case 'c': |
330 |
len += 1;
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331 |
break;
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332 |
default:
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333 |
fprintf(stderr, |
334 |
"v9fs_string_alloc_printf:Incorrect format %c", *iter);
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335 |
return -1; |
336 |
} |
337 |
iter++; |
338 |
} |
339 |
|
340 |
alloc_print:
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341 |
*strp = g_malloc((len + 1) * sizeof(**strp)); |
342 |
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343 |
return vsprintf(*strp, fmt, ap);
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344 |
} |
345 |
|
346 |
static void GCC_FMT_ATTR(2, 3) |
347 |
v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) |
348 |
{ |
349 |
va_list ap; |
350 |
int err;
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351 |
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352 |
v9fs_string_free(str); |
353 |
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354 |
va_start(ap, fmt); |
355 |
err = v9fs_string_alloc_printf(&str->data, fmt, ap); |
356 |
BUG_ON(err == -1);
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357 |
va_end(ap); |
358 |
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359 |
str->size = err; |
360 |
} |
361 |
|
362 |
static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) |
363 |
{ |
364 |
v9fs_string_free(lhs); |
365 |
v9fs_string_sprintf(lhs, "%s", rhs->data);
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366 |
} |
367 |
|
368 |
/*
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369 |
* Return TRUE if s1 is an ancestor of s2.
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370 |
*
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371 |
* E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d".
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372 |
* As a special case, We treat s1 as ancestor of s2 if they are same!
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373 |
*/
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374 |
static int v9fs_path_is_ancestor(V9fsString *s1, V9fsString *s2) |
375 |
{ |
376 |
if (!strncmp(s1->data, s2->data, s1->size)) {
|
377 |
if (s2->data[s1->size] == '\0' || s2->data[s1->size] == '/') { |
378 |
return 1; |
379 |
} |
380 |
} |
381 |
return 0; |
382 |
} |
383 |
|
384 |
static size_t v9fs_string_size(V9fsString *str)
|
385 |
{ |
386 |
return str->size;
|
387 |
} |
388 |
|
389 |
static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid)
|
390 |
{ |
391 |
V9fsFidState *f; |
392 |
|
393 |
for (f = s->fid_list; f; f = f->next) {
|
394 |
if (f->fid == fid) {
|
395 |
return f;
|
396 |
} |
397 |
} |
398 |
|
399 |
return NULL; |
400 |
} |
401 |
|
402 |
static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid)
|
403 |
{ |
404 |
V9fsFidState *f; |
405 |
|
406 |
f = lookup_fid(s, fid); |
407 |
if (f) {
|
408 |
return NULL; |
409 |
} |
410 |
|
411 |
f = g_malloc0(sizeof(V9fsFidState));
|
412 |
|
413 |
f->fid = fid; |
414 |
f->fid_type = P9_FID_NONE; |
415 |
|
416 |
f->next = s->fid_list; |
417 |
s->fid_list = f; |
418 |
|
419 |
return f;
|
420 |
} |
421 |
|
422 |
static int v9fs_xattr_fid_clunk(V9fsState *s, V9fsFidState *fidp) |
423 |
{ |
424 |
int retval = 0; |
425 |
|
426 |
if (fidp->fs.xattr.copied_len == -1) { |
427 |
/* getxattr/listxattr fid */
|
428 |
goto free_value;
|
429 |
} |
430 |
/*
|
431 |
* if this is fid for setxattr. clunk should
|
432 |
* result in setxattr localcall
|
433 |
*/
|
434 |
if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) {
|
435 |
/* clunk after partial write */
|
436 |
retval = -EINVAL; |
437 |
goto free_out;
|
438 |
} |
439 |
if (fidp->fs.xattr.len) {
|
440 |
retval = v9fs_do_lsetxattr(s, &fidp->path, &fidp->fs.xattr.name, |
441 |
fidp->fs.xattr.value, |
442 |
fidp->fs.xattr.len, |
443 |
fidp->fs.xattr.flags); |
444 |
} else {
|
445 |
retval = v9fs_do_lremovexattr(s, &fidp->path, &fidp->fs.xattr.name); |
446 |
} |
447 |
free_out:
|
448 |
v9fs_string_free(&fidp->fs.xattr.name); |
449 |
free_value:
|
450 |
if (fidp->fs.xattr.value) {
|
451 |
g_free(fidp->fs.xattr.value); |
452 |
} |
453 |
return retval;
|
454 |
} |
455 |
|
456 |
static int free_fid(V9fsState *s, int32_t fid) |
457 |
{ |
458 |
int retval = 0; |
459 |
V9fsFidState **fidpp, *fidp; |
460 |
|
461 |
for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) {
|
462 |
if ((*fidpp)->fid == fid) {
|
463 |
break;
|
464 |
} |
465 |
} |
466 |
|
467 |
if (*fidpp == NULL) { |
468 |
return -ENOENT;
|
469 |
} |
470 |
|
471 |
fidp = *fidpp; |
472 |
*fidpp = fidp->next; |
473 |
|
474 |
if (fidp->fid_type == P9_FID_FILE) {
|
475 |
v9fs_do_close(s, fidp->fs.fd); |
476 |
} else if (fidp->fid_type == P9_FID_DIR) { |
477 |
v9fs_do_closedir(s, fidp->fs.dir); |
478 |
} else if (fidp->fid_type == P9_FID_XATTR) { |
479 |
retval = v9fs_xattr_fid_clunk(s, fidp); |
480 |
} |
481 |
v9fs_string_free(&fidp->path); |
482 |
g_free(fidp); |
483 |
|
484 |
return retval;
|
485 |
} |
486 |
|
487 |
#define P9_QID_TYPE_DIR 0x80 |
488 |
#define P9_QID_TYPE_SYMLINK 0x02 |
489 |
|
490 |
#define P9_STAT_MODE_DIR 0x80000000 |
491 |
#define P9_STAT_MODE_APPEND 0x40000000 |
492 |
#define P9_STAT_MODE_EXCL 0x20000000 |
493 |
#define P9_STAT_MODE_MOUNT 0x10000000 |
494 |
#define P9_STAT_MODE_AUTH 0x08000000 |
495 |
#define P9_STAT_MODE_TMP 0x04000000 |
496 |
#define P9_STAT_MODE_SYMLINK 0x02000000 |
497 |
#define P9_STAT_MODE_LINK 0x01000000 |
498 |
#define P9_STAT_MODE_DEVICE 0x00800000 |
499 |
#define P9_STAT_MODE_NAMED_PIPE 0x00200000 |
500 |
#define P9_STAT_MODE_SOCKET 0x00100000 |
501 |
#define P9_STAT_MODE_SETUID 0x00080000 |
502 |
#define P9_STAT_MODE_SETGID 0x00040000 |
503 |
#define P9_STAT_MODE_SETVTX 0x00010000 |
504 |
|
505 |
#define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
|
506 |
P9_STAT_MODE_SYMLINK | \ |
507 |
P9_STAT_MODE_LINK | \ |
508 |
P9_STAT_MODE_DEVICE | \ |
509 |
P9_STAT_MODE_NAMED_PIPE | \ |
510 |
P9_STAT_MODE_SOCKET) |
511 |
|
512 |
/* This is the algorithm from ufs in spfs */
|
513 |
static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) |
514 |
{ |
515 |
size_t size; |
516 |
|
517 |
size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); |
518 |
memcpy(&qidp->path, &stbuf->st_ino, size); |
519 |
qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
|
520 |
qidp->type = 0;
|
521 |
if (S_ISDIR(stbuf->st_mode)) {
|
522 |
qidp->type |= P9_QID_TYPE_DIR; |
523 |
} |
524 |
if (S_ISLNK(stbuf->st_mode)) {
|
525 |
qidp->type |= P9_QID_TYPE_SYMLINK; |
526 |
} |
527 |
} |
528 |
|
529 |
static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) |
530 |
{ |
531 |
struct stat stbuf;
|
532 |
int err;
|
533 |
|
534 |
err = v9fs_do_lstat(s, &fidp->path, &stbuf); |
535 |
if (err) {
|
536 |
return err;
|
537 |
} |
538 |
|
539 |
stat_to_qid(&stbuf, qidp); |
540 |
return 0; |
541 |
} |
542 |
|
543 |
static V9fsPDU *alloc_pdu(V9fsState *s)
|
544 |
{ |
545 |
V9fsPDU *pdu = NULL;
|
546 |
|
547 |
if (!QLIST_EMPTY(&s->free_list)) {
|
548 |
pdu = QLIST_FIRST(&s->free_list); |
549 |
QLIST_REMOVE(pdu, next); |
550 |
} |
551 |
return pdu;
|
552 |
} |
553 |
|
554 |
static void free_pdu(V9fsState *s, V9fsPDU *pdu) |
555 |
{ |
556 |
if (pdu) {
|
557 |
if (debug_9p_pdu) {
|
558 |
pprint_pdu(pdu); |
559 |
} |
560 |
QLIST_INSERT_HEAD(&s->free_list, pdu, next); |
561 |
} |
562 |
} |
563 |
|
564 |
size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, |
565 |
size_t offset, size_t size, int pack)
|
566 |
{ |
567 |
int i = 0; |
568 |
size_t copied = 0;
|
569 |
|
570 |
for (i = 0; size && i < sg_count; i++) { |
571 |
size_t len; |
572 |
if (offset >= sg[i].iov_len) {
|
573 |
/* skip this sg */
|
574 |
offset -= sg[i].iov_len; |
575 |
continue;
|
576 |
} else {
|
577 |
len = MIN(sg[i].iov_len - offset, size); |
578 |
if (pack) {
|
579 |
memcpy(sg[i].iov_base + offset, addr, len); |
580 |
} else {
|
581 |
memcpy(addr, sg[i].iov_base + offset, len); |
582 |
} |
583 |
size -= len; |
584 |
copied += len; |
585 |
addr += len; |
586 |
if (size) {
|
587 |
offset = 0;
|
588 |
continue;
|
589 |
} |
590 |
} |
591 |
} |
592 |
|
593 |
return copied;
|
594 |
} |
595 |
|
596 |
static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
597 |
{ |
598 |
return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num,
|
599 |
offset, size, 0);
|
600 |
} |
601 |
|
602 |
static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, |
603 |
size_t size) |
604 |
{ |
605 |
return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, |
606 |
offset, size, 1);
|
607 |
} |
608 |
|
609 |
static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) |
610 |
{ |
611 |
size_t pos = 0;
|
612 |
int i, j;
|
613 |
struct iovec *src_sg;
|
614 |
unsigned int num; |
615 |
|
616 |
if (rx) {
|
617 |
src_sg = pdu->elem.in_sg; |
618 |
num = pdu->elem.in_num; |
619 |
} else {
|
620 |
src_sg = pdu->elem.out_sg; |
621 |
num = pdu->elem.out_num; |
622 |
} |
623 |
|
624 |
j = 0;
|
625 |
for (i = 0; i < num; i++) { |
626 |
if (offset <= pos) {
|
627 |
sg[j].iov_base = src_sg[i].iov_base; |
628 |
sg[j].iov_len = src_sg[i].iov_len; |
629 |
j++; |
630 |
} else if (offset < (src_sg[i].iov_len + pos)) { |
631 |
sg[j].iov_base = src_sg[i].iov_base; |
632 |
sg[j].iov_len = src_sg[i].iov_len; |
633 |
sg[j].iov_base += (offset - pos); |
634 |
sg[j].iov_len -= (offset - pos); |
635 |
j++; |
636 |
} |
637 |
pos += src_sg[i].iov_len; |
638 |
} |
639 |
|
640 |
return j;
|
641 |
} |
642 |
|
643 |
static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
644 |
{ |
645 |
size_t old_offset = offset; |
646 |
va_list ap; |
647 |
int i;
|
648 |
|
649 |
va_start(ap, fmt); |
650 |
for (i = 0; fmt[i]; i++) { |
651 |
switch (fmt[i]) {
|
652 |
case 'b': { |
653 |
uint8_t *valp = va_arg(ap, uint8_t *); |
654 |
offset += pdu_unpack(valp, pdu, offset, sizeof(*valp));
|
655 |
break;
|
656 |
} |
657 |
case 'w': { |
658 |
uint16_t val, *valp; |
659 |
valp = va_arg(ap, uint16_t *); |
660 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
661 |
*valp = le16_to_cpu(val); |
662 |
break;
|
663 |
} |
664 |
case 'd': { |
665 |
uint32_t val, *valp; |
666 |
valp = va_arg(ap, uint32_t *); |
667 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
668 |
*valp = le32_to_cpu(val); |
669 |
break;
|
670 |
} |
671 |
case 'q': { |
672 |
uint64_t val, *valp; |
673 |
valp = va_arg(ap, uint64_t *); |
674 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
675 |
*valp = le64_to_cpu(val); |
676 |
break;
|
677 |
} |
678 |
case 'v': { |
679 |
struct iovec *iov = va_arg(ap, struct iovec *); |
680 |
int *iovcnt = va_arg(ap, int *); |
681 |
*iovcnt = pdu_copy_sg(pdu, offset, 0, iov);
|
682 |
break;
|
683 |
} |
684 |
case 's': { |
685 |
V9fsString *str = va_arg(ap, V9fsString *); |
686 |
offset += pdu_unmarshal(pdu, offset, "w", &str->size);
|
687 |
/* FIXME: sanity check str->size */
|
688 |
str->data = g_malloc(str->size + 1);
|
689 |
offset += pdu_unpack(str->data, pdu, offset, str->size); |
690 |
str->data[str->size] = 0;
|
691 |
break;
|
692 |
} |
693 |
case 'Q': { |
694 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
695 |
offset += pdu_unmarshal(pdu, offset, "bdq",
|
696 |
&qidp->type, &qidp->version, &qidp->path); |
697 |
break;
|
698 |
} |
699 |
case 'S': { |
700 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
701 |
offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd",
|
702 |
&statp->size, &statp->type, &statp->dev, |
703 |
&statp->qid, &statp->mode, &statp->atime, |
704 |
&statp->mtime, &statp->length, |
705 |
&statp->name, &statp->uid, &statp->gid, |
706 |
&statp->muid, &statp->extension, |
707 |
&statp->n_uid, &statp->n_gid, |
708 |
&statp->n_muid); |
709 |
break;
|
710 |
} |
711 |
case 'I': { |
712 |
V9fsIattr *iattr = va_arg(ap, V9fsIattr *); |
713 |
offset += pdu_unmarshal(pdu, offset, "ddddqqqqq",
|
714 |
&iattr->valid, &iattr->mode, |
715 |
&iattr->uid, &iattr->gid, &iattr->size, |
716 |
&iattr->atime_sec, &iattr->atime_nsec, |
717 |
&iattr->mtime_sec, &iattr->mtime_nsec); |
718 |
break;
|
719 |
} |
720 |
default:
|
721 |
break;
|
722 |
} |
723 |
} |
724 |
|
725 |
va_end(ap); |
726 |
|
727 |
return offset - old_offset;
|
728 |
} |
729 |
|
730 |
static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
731 |
{ |
732 |
size_t old_offset = offset; |
733 |
va_list ap; |
734 |
int i;
|
735 |
|
736 |
va_start(ap, fmt); |
737 |
for (i = 0; fmt[i]; i++) { |
738 |
switch (fmt[i]) {
|
739 |
case 'b': { |
740 |
uint8_t val = va_arg(ap, int);
|
741 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
742 |
break;
|
743 |
} |
744 |
case 'w': { |
745 |
uint16_t val; |
746 |
cpu_to_le16w(&val, va_arg(ap, int));
|
747 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
748 |
break;
|
749 |
} |
750 |
case 'd': { |
751 |
uint32_t val; |
752 |
cpu_to_le32w(&val, va_arg(ap, uint32_t)); |
753 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
754 |
break;
|
755 |
} |
756 |
case 'q': { |
757 |
uint64_t val; |
758 |
cpu_to_le64w(&val, va_arg(ap, uint64_t)); |
759 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
760 |
break;
|
761 |
} |
762 |
case 'v': { |
763 |
struct iovec *iov = va_arg(ap, struct iovec *); |
764 |
int *iovcnt = va_arg(ap, int *); |
765 |
*iovcnt = pdu_copy_sg(pdu, offset, 1, iov);
|
766 |
break;
|
767 |
} |
768 |
case 's': { |
769 |
V9fsString *str = va_arg(ap, V9fsString *); |
770 |
offset += pdu_marshal(pdu, offset, "w", str->size);
|
771 |
offset += pdu_pack(pdu, offset, str->data, str->size); |
772 |
break;
|
773 |
} |
774 |
case 'Q': { |
775 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
776 |
offset += pdu_marshal(pdu, offset, "bdq",
|
777 |
qidp->type, qidp->version, qidp->path); |
778 |
break;
|
779 |
} |
780 |
case 'S': { |
781 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
782 |
offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd",
|
783 |
statp->size, statp->type, statp->dev, |
784 |
&statp->qid, statp->mode, statp->atime, |
785 |
statp->mtime, statp->length, &statp->name, |
786 |
&statp->uid, &statp->gid, &statp->muid, |
787 |
&statp->extension, statp->n_uid, |
788 |
statp->n_gid, statp->n_muid); |
789 |
break;
|
790 |
} |
791 |
case 'A': { |
792 |
V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *); |
793 |
offset += pdu_marshal(pdu, offset, "qQdddqqqqqqqqqqqqqqq",
|
794 |
statp->st_result_mask, |
795 |
&statp->qid, statp->st_mode, |
796 |
statp->st_uid, statp->st_gid, |
797 |
statp->st_nlink, statp->st_rdev, |
798 |
statp->st_size, statp->st_blksize, statp->st_blocks, |
799 |
statp->st_atime_sec, statp->st_atime_nsec, |
800 |
statp->st_mtime_sec, statp->st_mtime_nsec, |
801 |
statp->st_ctime_sec, statp->st_ctime_nsec, |
802 |
statp->st_btime_sec, statp->st_btime_nsec, |
803 |
statp->st_gen, statp->st_data_version); |
804 |
break;
|
805 |
} |
806 |
default:
|
807 |
break;
|
808 |
} |
809 |
} |
810 |
va_end(ap); |
811 |
|
812 |
return offset - old_offset;
|
813 |
} |
814 |
|
815 |
static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) |
816 |
{ |
817 |
int8_t id = pdu->id + 1; /* Response */ |
818 |
|
819 |
if (len < 0) { |
820 |
int err = -len;
|
821 |
len = 7;
|
822 |
|
823 |
if (s->proto_version != V9FS_PROTO_2000L) {
|
824 |
V9fsString str; |
825 |
|
826 |
str.data = strerror(err); |
827 |
str.size = strlen(str.data); |
828 |
|
829 |
len += pdu_marshal(pdu, len, "s", &str);
|
830 |
id = P9_RERROR; |
831 |
} |
832 |
|
833 |
len += pdu_marshal(pdu, len, "d", err);
|
834 |
|
835 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
836 |
id = P9_RLERROR; |
837 |
} |
838 |
} |
839 |
|
840 |
/* fill out the header */
|
841 |
pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); |
842 |
|
843 |
/* keep these in sync */
|
844 |
pdu->size = len; |
845 |
pdu->id = id; |
846 |
|
847 |
/* push onto queue and notify */
|
848 |
virtqueue_push(s->vq, &pdu->elem, len); |
849 |
|
850 |
/* FIXME: we should batch these completions */
|
851 |
virtio_notify(&s->vdev, s->vq); |
852 |
|
853 |
free_pdu(s, pdu); |
854 |
} |
855 |
|
856 |
static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension)
|
857 |
{ |
858 |
mode_t ret; |
859 |
|
860 |
ret = mode & 0777;
|
861 |
if (mode & P9_STAT_MODE_DIR) {
|
862 |
ret |= S_IFDIR; |
863 |
} |
864 |
|
865 |
if (mode & P9_STAT_MODE_SYMLINK) {
|
866 |
ret |= S_IFLNK; |
867 |
} |
868 |
if (mode & P9_STAT_MODE_SOCKET) {
|
869 |
ret |= S_IFSOCK; |
870 |
} |
871 |
if (mode & P9_STAT_MODE_NAMED_PIPE) {
|
872 |
ret |= S_IFIFO; |
873 |
} |
874 |
if (mode & P9_STAT_MODE_DEVICE) {
|
875 |
if (extension && extension->data[0] == 'c') { |
876 |
ret |= S_IFCHR; |
877 |
} else {
|
878 |
ret |= S_IFBLK; |
879 |
} |
880 |
} |
881 |
|
882 |
if (!(ret&~0777)) { |
883 |
ret |= S_IFREG; |
884 |
} |
885 |
|
886 |
if (mode & P9_STAT_MODE_SETUID) {
|
887 |
ret |= S_ISUID; |
888 |
} |
889 |
if (mode & P9_STAT_MODE_SETGID) {
|
890 |
ret |= S_ISGID; |
891 |
} |
892 |
if (mode & P9_STAT_MODE_SETVTX) {
|
893 |
ret |= S_ISVTX; |
894 |
} |
895 |
|
896 |
return ret;
|
897 |
} |
898 |
|
899 |
static int donttouch_stat(V9fsStat *stat) |
900 |
{ |
901 |
if (stat->type == -1 && |
902 |
stat->dev == -1 &&
|
903 |
stat->qid.type == -1 &&
|
904 |
stat->qid.version == -1 &&
|
905 |
stat->qid.path == -1 &&
|
906 |
stat->mode == -1 &&
|
907 |
stat->atime == -1 &&
|
908 |
stat->mtime == -1 &&
|
909 |
stat->length == -1 &&
|
910 |
!stat->name.size && |
911 |
!stat->uid.size && |
912 |
!stat->gid.size && |
913 |
!stat->muid.size && |
914 |
stat->n_uid == -1 &&
|
915 |
stat->n_gid == -1 &&
|
916 |
stat->n_muid == -1) {
|
917 |
return 1; |
918 |
} |
919 |
|
920 |
return 0; |
921 |
} |
922 |
|
923 |
static void v9fs_stat_free(V9fsStat *stat) |
924 |
{ |
925 |
v9fs_string_free(&stat->name); |
926 |
v9fs_string_free(&stat->uid); |
927 |
v9fs_string_free(&stat->gid); |
928 |
v9fs_string_free(&stat->muid); |
929 |
v9fs_string_free(&stat->extension); |
930 |
} |
931 |
|
932 |
static uint32_t stat_to_v9mode(const struct stat *stbuf) |
933 |
{ |
934 |
uint32_t mode; |
935 |
|
936 |
mode = stbuf->st_mode & 0777;
|
937 |
if (S_ISDIR(stbuf->st_mode)) {
|
938 |
mode |= P9_STAT_MODE_DIR; |
939 |
} |
940 |
|
941 |
if (S_ISLNK(stbuf->st_mode)) {
|
942 |
mode |= P9_STAT_MODE_SYMLINK; |
943 |
} |
944 |
|
945 |
if (S_ISSOCK(stbuf->st_mode)) {
|
946 |
mode |= P9_STAT_MODE_SOCKET; |
947 |
} |
948 |
|
949 |
if (S_ISFIFO(stbuf->st_mode)) {
|
950 |
mode |= P9_STAT_MODE_NAMED_PIPE; |
951 |
} |
952 |
|
953 |
if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) {
|
954 |
mode |= P9_STAT_MODE_DEVICE; |
955 |
} |
956 |
|
957 |
if (stbuf->st_mode & S_ISUID) {
|
958 |
mode |= P9_STAT_MODE_SETUID; |
959 |
} |
960 |
|
961 |
if (stbuf->st_mode & S_ISGID) {
|
962 |
mode |= P9_STAT_MODE_SETGID; |
963 |
} |
964 |
|
965 |
if (stbuf->st_mode & S_ISVTX) {
|
966 |
mode |= P9_STAT_MODE_SETVTX; |
967 |
} |
968 |
|
969 |
return mode;
|
970 |
} |
971 |
|
972 |
static int stat_to_v9stat(V9fsState *s, V9fsString *name, |
973 |
const struct stat *stbuf, |
974 |
V9fsStat *v9stat) |
975 |
{ |
976 |
int err;
|
977 |
const char *str; |
978 |
|
979 |
memset(v9stat, 0, sizeof(*v9stat)); |
980 |
|
981 |
stat_to_qid(stbuf, &v9stat->qid); |
982 |
v9stat->mode = stat_to_v9mode(stbuf); |
983 |
v9stat->atime = stbuf->st_atime; |
984 |
v9stat->mtime = stbuf->st_mtime; |
985 |
v9stat->length = stbuf->st_size; |
986 |
|
987 |
v9fs_string_null(&v9stat->uid); |
988 |
v9fs_string_null(&v9stat->gid); |
989 |
v9fs_string_null(&v9stat->muid); |
990 |
|
991 |
v9stat->n_uid = stbuf->st_uid; |
992 |
v9stat->n_gid = stbuf->st_gid; |
993 |
v9stat->n_muid = 0;
|
994 |
|
995 |
v9fs_string_null(&v9stat->extension); |
996 |
|
997 |
if (v9stat->mode & P9_STAT_MODE_SYMLINK) {
|
998 |
err = v9fs_co_readlink(s, name, &v9stat->extension); |
999 |
if (err < 0) { |
1000 |
return err;
|
1001 |
} |
1002 |
} else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
1003 |
v9fs_string_sprintf(&v9stat->extension, "%c %u %u",
|
1004 |
S_ISCHR(stbuf->st_mode) ? 'c' : 'b', |
1005 |
major(stbuf->st_rdev), minor(stbuf->st_rdev)); |
1006 |
} else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { |
1007 |
v9fs_string_sprintf(&v9stat->extension, "%s %lu",
|
1008 |
"HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); |
1009 |
} |
1010 |
|
1011 |
str = strrchr(name->data, '/');
|
1012 |
if (str) {
|
1013 |
str += 1;
|
1014 |
} else {
|
1015 |
str = name->data; |
1016 |
} |
1017 |
|
1018 |
v9fs_string_sprintf(&v9stat->name, "%s", str);
|
1019 |
|
1020 |
v9stat->size = 61 +
|
1021 |
v9fs_string_size(&v9stat->name) + |
1022 |
v9fs_string_size(&v9stat->uid) + |
1023 |
v9fs_string_size(&v9stat->gid) + |
1024 |
v9fs_string_size(&v9stat->muid) + |
1025 |
v9fs_string_size(&v9stat->extension); |
1026 |
return 0; |
1027 |
} |
1028 |
|
1029 |
#define P9_STATS_MODE 0x00000001ULL |
1030 |
#define P9_STATS_NLINK 0x00000002ULL |
1031 |
#define P9_STATS_UID 0x00000004ULL |
1032 |
#define P9_STATS_GID 0x00000008ULL |
1033 |
#define P9_STATS_RDEV 0x00000010ULL |
1034 |
#define P9_STATS_ATIME 0x00000020ULL |
1035 |
#define P9_STATS_MTIME 0x00000040ULL |
1036 |
#define P9_STATS_CTIME 0x00000080ULL |
1037 |
#define P9_STATS_INO 0x00000100ULL |
1038 |
#define P9_STATS_SIZE 0x00000200ULL |
1039 |
#define P9_STATS_BLOCKS 0x00000400ULL |
1040 |
|
1041 |
#define P9_STATS_BTIME 0x00000800ULL |
1042 |
#define P9_STATS_GEN 0x00001000ULL |
1043 |
#define P9_STATS_DATA_VERSION 0x00002000ULL |
1044 |
|
1045 |
#define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ |
1046 |
#define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ |
1047 |
|
1048 |
|
1049 |
static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, |
1050 |
V9fsStatDotl *v9lstat) |
1051 |
{ |
1052 |
memset(v9lstat, 0, sizeof(*v9lstat)); |
1053 |
|
1054 |
v9lstat->st_mode = stbuf->st_mode; |
1055 |
v9lstat->st_nlink = stbuf->st_nlink; |
1056 |
v9lstat->st_uid = stbuf->st_uid; |
1057 |
v9lstat->st_gid = stbuf->st_gid; |
1058 |
v9lstat->st_rdev = stbuf->st_rdev; |
1059 |
v9lstat->st_size = stbuf->st_size; |
1060 |
v9lstat->st_blksize = stbuf->st_blksize; |
1061 |
v9lstat->st_blocks = stbuf->st_blocks; |
1062 |
v9lstat->st_atime_sec = stbuf->st_atime; |
1063 |
v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; |
1064 |
v9lstat->st_mtime_sec = stbuf->st_mtime; |
1065 |
v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; |
1066 |
v9lstat->st_ctime_sec = stbuf->st_ctime; |
1067 |
v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; |
1068 |
/* Currently we only support BASIC fields in stat */
|
1069 |
v9lstat->st_result_mask = P9_STATS_BASIC; |
1070 |
|
1071 |
stat_to_qid(stbuf, &v9lstat->qid); |
1072 |
} |
1073 |
|
1074 |
static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
1075 |
{ |
1076 |
while (len && *iovcnt) {
|
1077 |
if (len < sg->iov_len) {
|
1078 |
sg->iov_len -= len; |
1079 |
sg->iov_base += len; |
1080 |
len = 0;
|
1081 |
} else {
|
1082 |
len -= sg->iov_len; |
1083 |
sg++; |
1084 |
*iovcnt -= 1;
|
1085 |
} |
1086 |
} |
1087 |
|
1088 |
return sg;
|
1089 |
} |
1090 |
|
1091 |
static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) |
1092 |
{ |
1093 |
int i;
|
1094 |
int total = 0; |
1095 |
|
1096 |
for (i = 0; i < *cnt; i++) { |
1097 |
if ((total + sg[i].iov_len) > cap) {
|
1098 |
sg[i].iov_len -= ((total + sg[i].iov_len) - cap); |
1099 |
i++; |
1100 |
break;
|
1101 |
} |
1102 |
total += sg[i].iov_len; |
1103 |
} |
1104 |
|
1105 |
*cnt = i; |
1106 |
|
1107 |
return sg;
|
1108 |
} |
1109 |
|
1110 |
static void print_sg(struct iovec *sg, int cnt) |
1111 |
{ |
1112 |
int i;
|
1113 |
|
1114 |
printf("sg[%d]: {", cnt);
|
1115 |
for (i = 0; i < cnt; i++) { |
1116 |
if (i) {
|
1117 |
printf(", ");
|
1118 |
} |
1119 |
printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len);
|
1120 |
} |
1121 |
printf("}\n");
|
1122 |
} |
1123 |
|
1124 |
static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len) |
1125 |
{ |
1126 |
V9fsString str; |
1127 |
v9fs_string_init(&str); |
1128 |
v9fs_string_copy(&str, dst); |
1129 |
v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len);
|
1130 |
v9fs_string_free(&str); |
1131 |
} |
1132 |
|
1133 |
static void v9fs_version(void *opaque) |
1134 |
{ |
1135 |
V9fsPDU *pdu = opaque; |
1136 |
V9fsState *s = pdu->s; |
1137 |
V9fsString version; |
1138 |
size_t offset = 7;
|
1139 |
|
1140 |
pdu_unmarshal(pdu, offset, "ds", &s->msize, &version);
|
1141 |
|
1142 |
if (!strcmp(version.data, "9P2000.u")) { |
1143 |
s->proto_version = V9FS_PROTO_2000U; |
1144 |
} else if (!strcmp(version.data, "9P2000.L")) { |
1145 |
s->proto_version = V9FS_PROTO_2000L; |
1146 |
} else {
|
1147 |
v9fs_string_sprintf(&version, "unknown");
|
1148 |
} |
1149 |
|
1150 |
offset += pdu_marshal(pdu, offset, "ds", s->msize, &version);
|
1151 |
complete_pdu(s, pdu, offset); |
1152 |
|
1153 |
v9fs_string_free(&version); |
1154 |
return;
|
1155 |
} |
1156 |
|
1157 |
static void v9fs_attach(void *opaque) |
1158 |
{ |
1159 |
V9fsPDU *pdu = opaque; |
1160 |
V9fsState *s = pdu->s; |
1161 |
int32_t fid, afid, n_uname; |
1162 |
V9fsString uname, aname; |
1163 |
V9fsFidState *fidp; |
1164 |
V9fsQID qid; |
1165 |
size_t offset = 7;
|
1166 |
ssize_t err; |
1167 |
|
1168 |
pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname);
|
1169 |
|
1170 |
fidp = alloc_fid(s, fid); |
1171 |
if (fidp == NULL) { |
1172 |
err = -EINVAL; |
1173 |
goto out;
|
1174 |
} |
1175 |
|
1176 |
fidp->uid = n_uname; |
1177 |
|
1178 |
v9fs_string_sprintf(&fidp->path, "%s", "/"); |
1179 |
err = fid_to_qid(s, fidp, &qid); |
1180 |
if (err) {
|
1181 |
err = -EINVAL; |
1182 |
free_fid(s, fid); |
1183 |
goto out;
|
1184 |
} |
1185 |
|
1186 |
offset += pdu_marshal(pdu, offset, "Q", &qid);
|
1187 |
|
1188 |
err = offset; |
1189 |
out:
|
1190 |
complete_pdu(s, pdu, err); |
1191 |
v9fs_string_free(&uname); |
1192 |
v9fs_string_free(&aname); |
1193 |
} |
1194 |
|
1195 |
static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err) |
1196 |
{ |
1197 |
if (err == -1) { |
1198 |
err = -errno; |
1199 |
goto out;
|
1200 |
} |
1201 |
|
1202 |
err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat); |
1203 |
if (err) {
|
1204 |
goto out;
|
1205 |
} |
1206 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat); |
1207 |
err = vs->offset; |
1208 |
|
1209 |
out:
|
1210 |
complete_pdu(s, vs->pdu, err); |
1211 |
v9fs_stat_free(&vs->v9stat); |
1212 |
g_free(vs); |
1213 |
} |
1214 |
|
1215 |
static void v9fs_stat(void *opaque) |
1216 |
{ |
1217 |
V9fsPDU *pdu = opaque; |
1218 |
V9fsState *s = pdu->s; |
1219 |
int32_t fid; |
1220 |
V9fsStatState *vs; |
1221 |
ssize_t err = 0;
|
1222 |
|
1223 |
vs = g_malloc(sizeof(*vs));
|
1224 |
vs->pdu = pdu; |
1225 |
vs->offset = 7;
|
1226 |
|
1227 |
memset(&vs->v9stat, 0, sizeof(vs->v9stat)); |
1228 |
|
1229 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
1230 |
|
1231 |
vs->fidp = lookup_fid(s, fid); |
1232 |
if (vs->fidp == NULL) { |
1233 |
err = -ENOENT; |
1234 |
goto out;
|
1235 |
} |
1236 |
|
1237 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1238 |
v9fs_stat_post_lstat(s, vs, err); |
1239 |
return;
|
1240 |
|
1241 |
out:
|
1242 |
complete_pdu(s, vs->pdu, err); |
1243 |
v9fs_stat_free(&vs->v9stat); |
1244 |
g_free(vs); |
1245 |
} |
1246 |
|
1247 |
static void v9fs_getattr(void *opaque) |
1248 |
{ |
1249 |
int32_t fid; |
1250 |
size_t offset = 7;
|
1251 |
ssize_t retval = 0;
|
1252 |
struct stat stbuf;
|
1253 |
V9fsFidState *fidp; |
1254 |
uint64_t request_mask; |
1255 |
V9fsStatDotl v9stat_dotl; |
1256 |
V9fsPDU *pdu = opaque; |
1257 |
V9fsState *s = pdu->s; |
1258 |
|
1259 |
pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask);
|
1260 |
|
1261 |
fidp = lookup_fid(s, fid); |
1262 |
if (fidp == NULL) { |
1263 |
retval = -ENOENT; |
1264 |
goto out;
|
1265 |
} |
1266 |
/*
|
1267 |
* Currently we only support BASIC fields in stat, so there is no
|
1268 |
* need to look at request_mask.
|
1269 |
*/
|
1270 |
retval = v9fs_co_lstat(s, &fidp->path, &stbuf); |
1271 |
if (retval < 0) { |
1272 |
goto out;
|
1273 |
} |
1274 |
stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl); |
1275 |
retval = offset; |
1276 |
retval += pdu_marshal(pdu, offset, "A", &v9stat_dotl);
|
1277 |
out:
|
1278 |
complete_pdu(s, pdu, retval); |
1279 |
} |
1280 |
|
1281 |
/* From Linux kernel code */
|
1282 |
#define ATTR_MODE (1 << 0) |
1283 |
#define ATTR_UID (1 << 1) |
1284 |
#define ATTR_GID (1 << 2) |
1285 |
#define ATTR_SIZE (1 << 3) |
1286 |
#define ATTR_ATIME (1 << 4) |
1287 |
#define ATTR_MTIME (1 << 5) |
1288 |
#define ATTR_CTIME (1 << 6) |
1289 |
#define ATTR_MASK 127 |
1290 |
#define ATTR_ATIME_SET (1 << 7) |
1291 |
#define ATTR_MTIME_SET (1 << 8) |
1292 |
|
1293 |
static void v9fs_setattr(void *opaque) |
1294 |
{ |
1295 |
int err = 0; |
1296 |
int32_t fid; |
1297 |
V9fsFidState *fidp; |
1298 |
size_t offset = 7;
|
1299 |
V9fsIattr v9iattr; |
1300 |
V9fsPDU *pdu = opaque; |
1301 |
V9fsState *s = pdu->s; |
1302 |
|
1303 |
pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr);
|
1304 |
|
1305 |
fidp = lookup_fid(s, fid); |
1306 |
if (fidp == NULL) { |
1307 |
err = -EINVAL; |
1308 |
goto out;
|
1309 |
} |
1310 |
if (v9iattr.valid & ATTR_MODE) {
|
1311 |
err = v9fs_co_chmod(s, &fidp->path, v9iattr.mode); |
1312 |
if (err < 0) { |
1313 |
goto out;
|
1314 |
} |
1315 |
} |
1316 |
if (v9iattr.valid & (ATTR_ATIME | ATTR_MTIME)) {
|
1317 |
struct timespec times[2]; |
1318 |
if (v9iattr.valid & ATTR_ATIME) {
|
1319 |
if (v9iattr.valid & ATTR_ATIME_SET) {
|
1320 |
times[0].tv_sec = v9iattr.atime_sec;
|
1321 |
times[0].tv_nsec = v9iattr.atime_nsec;
|
1322 |
} else {
|
1323 |
times[0].tv_nsec = UTIME_NOW;
|
1324 |
} |
1325 |
} else {
|
1326 |
times[0].tv_nsec = UTIME_OMIT;
|
1327 |
} |
1328 |
if (v9iattr.valid & ATTR_MTIME) {
|
1329 |
if (v9iattr.valid & ATTR_MTIME_SET) {
|
1330 |
times[1].tv_sec = v9iattr.mtime_sec;
|
1331 |
times[1].tv_nsec = v9iattr.mtime_nsec;
|
1332 |
} else {
|
1333 |
times[1].tv_nsec = UTIME_NOW;
|
1334 |
} |
1335 |
} else {
|
1336 |
times[1].tv_nsec = UTIME_OMIT;
|
1337 |
} |
1338 |
err = v9fs_co_utimensat(s, &fidp->path, times); |
1339 |
if (err < 0) { |
1340 |
goto out;
|
1341 |
} |
1342 |
} |
1343 |
/*
|
1344 |
* If the only valid entry in iattr is ctime we can call
|
1345 |
* chown(-1,-1) to update the ctime of the file
|
1346 |
*/
|
1347 |
if ((v9iattr.valid & (ATTR_UID | ATTR_GID)) ||
|
1348 |
((v9iattr.valid & ATTR_CTIME) |
1349 |
&& !((v9iattr.valid & ATTR_MASK) & ~ATTR_CTIME))) { |
1350 |
if (!(v9iattr.valid & ATTR_UID)) {
|
1351 |
v9iattr.uid = -1;
|
1352 |
} |
1353 |
if (!(v9iattr.valid & ATTR_GID)) {
|
1354 |
v9iattr.gid = -1;
|
1355 |
} |
1356 |
err = v9fs_co_chown(s, &fidp->path, v9iattr.uid, |
1357 |
v9iattr.gid); |
1358 |
if (err < 0) { |
1359 |
goto out;
|
1360 |
} |
1361 |
} |
1362 |
if (v9iattr.valid & (ATTR_SIZE)) {
|
1363 |
err = v9fs_co_truncate(s, &fidp->path, v9iattr.size); |
1364 |
if (err < 0) { |
1365 |
goto out;
|
1366 |
} |
1367 |
} |
1368 |
err = offset; |
1369 |
out:
|
1370 |
complete_pdu(s, pdu, err); |
1371 |
} |
1372 |
|
1373 |
static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err) |
1374 |
{ |
1375 |
complete_pdu(s, vs->pdu, err); |
1376 |
|
1377 |
if (vs->nwnames && vs->nwnames <= P9_MAXWELEM) {
|
1378 |
for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) { |
1379 |
v9fs_string_free(&vs->wnames[vs->name_idx]); |
1380 |
} |
1381 |
|
1382 |
g_free(vs->wnames); |
1383 |
g_free(vs->qids); |
1384 |
} |
1385 |
} |
1386 |
|
1387 |
static void v9fs_walk_marshal(V9fsWalkState *vs) |
1388 |
{ |
1389 |
int i;
|
1390 |
vs->offset = 7;
|
1391 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames);
|
1392 |
|
1393 |
for (i = 0; i < vs->nwnames; i++) { |
1394 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]);
|
1395 |
} |
1396 |
} |
1397 |
|
1398 |
static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs, |
1399 |
int err)
|
1400 |
{ |
1401 |
if (err == -1) { |
1402 |
free_fid(s, vs->newfidp->fid); |
1403 |
v9fs_string_free(&vs->path); |
1404 |
err = -ENOENT; |
1405 |
goto out;
|
1406 |
} |
1407 |
|
1408 |
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); |
1409 |
|
1410 |
vs->name_idx++; |
1411 |
if (vs->name_idx < vs->nwnames) {
|
1412 |
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
1413 |
vs->wnames[vs->name_idx].data); |
1414 |
v9fs_string_copy(&vs->newfidp->path, &vs->path); |
1415 |
|
1416 |
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); |
1417 |
v9fs_walk_post_newfid_lstat(s, vs, err); |
1418 |
return;
|
1419 |
} |
1420 |
|
1421 |
v9fs_string_free(&vs->path); |
1422 |
v9fs_walk_marshal(vs); |
1423 |
err = vs->offset; |
1424 |
out:
|
1425 |
v9fs_walk_complete(s, vs, err); |
1426 |
} |
1427 |
|
1428 |
static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs, |
1429 |
int err)
|
1430 |
{ |
1431 |
if (err == -1) { |
1432 |
v9fs_string_free(&vs->path); |
1433 |
err = -ENOENT; |
1434 |
goto out;
|
1435 |
} |
1436 |
|
1437 |
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); |
1438 |
vs->name_idx++; |
1439 |
if (vs->name_idx < vs->nwnames) {
|
1440 |
|
1441 |
v9fs_string_sprintf(&vs->path, "%s/%s",
|
1442 |
vs->fidp->path.data, vs->wnames[vs->name_idx].data); |
1443 |
v9fs_string_copy(&vs->fidp->path, &vs->path); |
1444 |
|
1445 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1446 |
v9fs_walk_post_oldfid_lstat(s, vs, err); |
1447 |
return;
|
1448 |
} |
1449 |
|
1450 |
v9fs_string_free(&vs->path); |
1451 |
v9fs_walk_marshal(vs); |
1452 |
err = vs->offset; |
1453 |
out:
|
1454 |
v9fs_walk_complete(s, vs, err); |
1455 |
} |
1456 |
|
1457 |
static void v9fs_walk(void *opaque) |
1458 |
{ |
1459 |
V9fsPDU *pdu = opaque; |
1460 |
V9fsState *s = pdu->s; |
1461 |
int32_t fid, newfid; |
1462 |
V9fsWalkState *vs; |
1463 |
int err = 0; |
1464 |
int i;
|
1465 |
|
1466 |
vs = g_malloc(sizeof(*vs));
|
1467 |
vs->pdu = pdu; |
1468 |
vs->wnames = NULL;
|
1469 |
vs->qids = NULL;
|
1470 |
vs->offset = 7;
|
1471 |
|
1472 |
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid,
|
1473 |
&newfid, &vs->nwnames); |
1474 |
|
1475 |
if (vs->nwnames && vs->nwnames <= P9_MAXWELEM) {
|
1476 |
vs->wnames = g_malloc0(sizeof(vs->wnames[0]) * vs->nwnames); |
1477 |
|
1478 |
vs->qids = g_malloc0(sizeof(vs->qids[0]) * vs->nwnames); |
1479 |
|
1480 |
for (i = 0; i < vs->nwnames; i++) { |
1481 |
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s",
|
1482 |
&vs->wnames[i]); |
1483 |
} |
1484 |
} else if (vs->nwnames > P9_MAXWELEM) { |
1485 |
err = -EINVAL; |
1486 |
goto out;
|
1487 |
} |
1488 |
|
1489 |
vs->fidp = lookup_fid(s, fid); |
1490 |
if (vs->fidp == NULL) { |
1491 |
err = -ENOENT; |
1492 |
goto out;
|
1493 |
} |
1494 |
|
1495 |
/* FIXME: is this really valid? */
|
1496 |
if (fid == newfid) {
|
1497 |
|
1498 |
BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
1499 |
v9fs_string_init(&vs->path); |
1500 |
vs->name_idx = 0;
|
1501 |
|
1502 |
if (vs->name_idx < vs->nwnames) {
|
1503 |
v9fs_string_sprintf(&vs->path, "%s/%s",
|
1504 |
vs->fidp->path.data, vs->wnames[vs->name_idx].data); |
1505 |
v9fs_string_copy(&vs->fidp->path, &vs->path); |
1506 |
|
1507 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1508 |
v9fs_walk_post_oldfid_lstat(s, vs, err); |
1509 |
return;
|
1510 |
} |
1511 |
} else {
|
1512 |
vs->newfidp = alloc_fid(s, newfid); |
1513 |
if (vs->newfidp == NULL) { |
1514 |
err = -EINVAL; |
1515 |
goto out;
|
1516 |
} |
1517 |
|
1518 |
vs->newfidp->uid = vs->fidp->uid; |
1519 |
v9fs_string_init(&vs->path); |
1520 |
vs->name_idx = 0;
|
1521 |
v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path); |
1522 |
|
1523 |
if (vs->name_idx < vs->nwnames) {
|
1524 |
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
1525 |
vs->wnames[vs->name_idx].data); |
1526 |
v9fs_string_copy(&vs->newfidp->path, &vs->path); |
1527 |
|
1528 |
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); |
1529 |
v9fs_walk_post_newfid_lstat(s, vs, err); |
1530 |
return;
|
1531 |
} |
1532 |
} |
1533 |
|
1534 |
v9fs_walk_marshal(vs); |
1535 |
err = vs->offset; |
1536 |
out:
|
1537 |
v9fs_walk_complete(s, vs, err); |
1538 |
} |
1539 |
|
1540 |
static int32_t get_iounit(V9fsState *s, V9fsString *name)
|
1541 |
{ |
1542 |
struct statfs stbuf;
|
1543 |
int32_t iounit = 0;
|
1544 |
|
1545 |
/*
|
1546 |
* iounit should be multiples of f_bsize (host filesystem block size
|
1547 |
* and as well as less than (client msize - P9_IOHDRSZ))
|
1548 |
*/
|
1549 |
if (!v9fs_do_statfs(s, name, &stbuf)) {
|
1550 |
iounit = stbuf.f_bsize; |
1551 |
iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; |
1552 |
} |
1553 |
|
1554 |
if (!iounit) {
|
1555 |
iounit = s->msize - P9_IOHDRSZ; |
1556 |
} |
1557 |
return iounit;
|
1558 |
} |
1559 |
|
1560 |
static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err) |
1561 |
{ |
1562 |
if (vs->fidp->fs.dir == NULL) { |
1563 |
err = -errno; |
1564 |
goto out;
|
1565 |
} |
1566 |
vs->fidp->fid_type = P9_FID_DIR; |
1567 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
1568 |
err = vs->offset; |
1569 |
out:
|
1570 |
complete_pdu(s, vs->pdu, err); |
1571 |
g_free(vs); |
1572 |
|
1573 |
} |
1574 |
|
1575 |
static void v9fs_open_post_getiounit(V9fsState *s, V9fsOpenState *vs) |
1576 |
{ |
1577 |
int err;
|
1578 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
|
1579 |
err = vs->offset; |
1580 |
complete_pdu(s, vs->pdu, err); |
1581 |
g_free(vs); |
1582 |
} |
1583 |
|
1584 |
static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err) |
1585 |
{ |
1586 |
if (vs->fidp->fs.fd == -1) { |
1587 |
err = -errno; |
1588 |
goto out;
|
1589 |
} |
1590 |
vs->fidp->fid_type = P9_FID_FILE; |
1591 |
vs->iounit = get_iounit(s, &vs->fidp->path); |
1592 |
v9fs_open_post_getiounit(s, vs); |
1593 |
return;
|
1594 |
out:
|
1595 |
complete_pdu(s, vs->pdu, err); |
1596 |
g_free(vs); |
1597 |
} |
1598 |
|
1599 |
static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err) |
1600 |
{ |
1601 |
int flags;
|
1602 |
|
1603 |
if (err) {
|
1604 |
err = -errno; |
1605 |
goto out;
|
1606 |
} |
1607 |
|
1608 |
stat_to_qid(&vs->stbuf, &vs->qid); |
1609 |
|
1610 |
if (S_ISDIR(vs->stbuf.st_mode)) {
|
1611 |
vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fidp->path); |
1612 |
v9fs_open_post_opendir(s, vs, err); |
1613 |
} else {
|
1614 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
1615 |
flags = vs->mode; |
1616 |
flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); |
1617 |
/* Ignore direct disk access hint until the server supports it. */
|
1618 |
flags &= ~O_DIRECT; |
1619 |
} else {
|
1620 |
flags = omode_to_uflags(vs->mode); |
1621 |
} |
1622 |
vs->fidp->fs.fd = v9fs_do_open(s, &vs->fidp->path, flags); |
1623 |
v9fs_open_post_open(s, vs, err); |
1624 |
} |
1625 |
return;
|
1626 |
out:
|
1627 |
complete_pdu(s, vs->pdu, err); |
1628 |
g_free(vs); |
1629 |
} |
1630 |
|
1631 |
static void v9fs_open(void *opaque) |
1632 |
{ |
1633 |
V9fsPDU *pdu = opaque; |
1634 |
V9fsState *s = pdu->s; |
1635 |
int32_t fid; |
1636 |
V9fsOpenState *vs; |
1637 |
ssize_t err = 0;
|
1638 |
|
1639 |
vs = g_malloc(sizeof(*vs));
|
1640 |
vs->pdu = pdu; |
1641 |
vs->offset = 7;
|
1642 |
vs->mode = 0;
|
1643 |
|
1644 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
1645 |
pdu_unmarshal(vs->pdu, vs->offset, "dd", &fid, &vs->mode);
|
1646 |
} else {
|
1647 |
pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode);
|
1648 |
} |
1649 |
|
1650 |
vs->fidp = lookup_fid(s, fid); |
1651 |
if (vs->fidp == NULL) { |
1652 |
err = -ENOENT; |
1653 |
goto out;
|
1654 |
} |
1655 |
|
1656 |
BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
1657 |
|
1658 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1659 |
|
1660 |
v9fs_open_post_lstat(s, vs, err); |
1661 |
return;
|
1662 |
out:
|
1663 |
complete_pdu(s, pdu, err); |
1664 |
g_free(vs); |
1665 |
} |
1666 |
|
1667 |
static void v9fs_post_lcreate(V9fsState *s, V9fsLcreateState *vs, int err) |
1668 |
{ |
1669 |
if (err == 0) { |
1670 |
v9fs_string_copy(&vs->fidp->path, &vs->fullname); |
1671 |
stat_to_qid(&vs->stbuf, &vs->qid); |
1672 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid,
|
1673 |
vs->iounit); |
1674 |
err = vs->offset; |
1675 |
} else {
|
1676 |
vs->fidp->fid_type = P9_FID_NONE; |
1677 |
err = -errno; |
1678 |
if (vs->fidp->fs.fd > 0) { |
1679 |
close(vs->fidp->fs.fd); |
1680 |
} |
1681 |
} |
1682 |
|
1683 |
complete_pdu(s, vs->pdu, err); |
1684 |
v9fs_string_free(&vs->name); |
1685 |
v9fs_string_free(&vs->fullname); |
1686 |
g_free(vs); |
1687 |
} |
1688 |
|
1689 |
static void v9fs_lcreate_post_get_iounit(V9fsState *s, V9fsLcreateState *vs, |
1690 |
int err)
|
1691 |
{ |
1692 |
if (err) {
|
1693 |
err = -errno; |
1694 |
goto out;
|
1695 |
} |
1696 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
1697 |
|
1698 |
out:
|
1699 |
v9fs_post_lcreate(s, vs, err); |
1700 |
} |
1701 |
|
1702 |
static void v9fs_lcreate_post_do_open2(V9fsState *s, V9fsLcreateState *vs, |
1703 |
int err)
|
1704 |
{ |
1705 |
if (vs->fidp->fs.fd == -1) { |
1706 |
err = -errno; |
1707 |
goto out;
|
1708 |
} |
1709 |
vs->fidp->fid_type = P9_FID_FILE; |
1710 |
vs->iounit = get_iounit(s, &vs->fullname); |
1711 |
v9fs_lcreate_post_get_iounit(s, vs, err); |
1712 |
return;
|
1713 |
|
1714 |
out:
|
1715 |
v9fs_post_lcreate(s, vs, err); |
1716 |
} |
1717 |
|
1718 |
static void v9fs_lcreate(void *opaque) |
1719 |
{ |
1720 |
V9fsPDU *pdu = opaque; |
1721 |
V9fsState *s = pdu->s; |
1722 |
int32_t dfid, flags, mode; |
1723 |
gid_t gid; |
1724 |
V9fsLcreateState *vs; |
1725 |
ssize_t err = 0;
|
1726 |
|
1727 |
vs = g_malloc(sizeof(*vs));
|
1728 |
vs->pdu = pdu; |
1729 |
vs->offset = 7;
|
1730 |
|
1731 |
v9fs_string_init(&vs->fullname); |
1732 |
|
1733 |
pdu_unmarshal(vs->pdu, vs->offset, "dsddd", &dfid, &vs->name, &flags,
|
1734 |
&mode, &gid); |
1735 |
|
1736 |
vs->fidp = lookup_fid(s, dfid); |
1737 |
if (vs->fidp == NULL) { |
1738 |
err = -ENOENT; |
1739 |
goto out;
|
1740 |
} |
1741 |
|
1742 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
|
1743 |
vs->name.data); |
1744 |
|
1745 |
/* Ignore direct disk access hint until the server supports it. */
|
1746 |
flags &= ~O_DIRECT; |
1747 |
|
1748 |
vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
1749 |
gid, flags, mode); |
1750 |
v9fs_lcreate_post_do_open2(s, vs, err); |
1751 |
return;
|
1752 |
|
1753 |
out:
|
1754 |
complete_pdu(s, vs->pdu, err); |
1755 |
v9fs_string_free(&vs->name); |
1756 |
g_free(vs); |
1757 |
} |
1758 |
|
1759 |
static void v9fs_post_do_fsync(V9fsState *s, V9fsPDU *pdu, int err) |
1760 |
{ |
1761 |
if (err == -1) { |
1762 |
err = -errno; |
1763 |
} |
1764 |
complete_pdu(s, pdu, err); |
1765 |
} |
1766 |
|
1767 |
static void v9fs_fsync(void *opaque) |
1768 |
{ |
1769 |
V9fsPDU *pdu = opaque; |
1770 |
V9fsState *s = pdu->s; |
1771 |
int32_t fid; |
1772 |
size_t offset = 7;
|
1773 |
V9fsFidState *fidp; |
1774 |
int datasync;
|
1775 |
int err;
|
1776 |
|
1777 |
pdu_unmarshal(pdu, offset, "dd", &fid, &datasync);
|
1778 |
fidp = lookup_fid(s, fid); |
1779 |
if (fidp == NULL) { |
1780 |
err = -ENOENT; |
1781 |
v9fs_post_do_fsync(s, pdu, err); |
1782 |
return;
|
1783 |
} |
1784 |
err = v9fs_do_fsync(s, fidp->fs.fd, datasync); |
1785 |
v9fs_post_do_fsync(s, pdu, err); |
1786 |
} |
1787 |
|
1788 |
static void v9fs_clunk(void *opaque) |
1789 |
{ |
1790 |
V9fsPDU *pdu = opaque; |
1791 |
V9fsState *s = pdu->s; |
1792 |
int32_t fid; |
1793 |
size_t offset = 7;
|
1794 |
int err;
|
1795 |
|
1796 |
pdu_unmarshal(pdu, offset, "d", &fid);
|
1797 |
|
1798 |
err = free_fid(s, fid); |
1799 |
if (err < 0) { |
1800 |
goto out;
|
1801 |
} |
1802 |
|
1803 |
offset = 7;
|
1804 |
err = offset; |
1805 |
out:
|
1806 |
complete_pdu(s, pdu, err); |
1807 |
} |
1808 |
|
1809 |
static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t); |
1810 |
|
1811 |
static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1812 |
{ |
1813 |
if (err) {
|
1814 |
goto out;
|
1815 |
} |
1816 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
1817 |
vs->offset += vs->count; |
1818 |
err = vs->offset; |
1819 |
out:
|
1820 |
complete_pdu(s, vs->pdu, err); |
1821 |
v9fs_stat_free(&vs->v9stat); |
1822 |
v9fs_string_free(&vs->name); |
1823 |
g_free(vs); |
1824 |
return;
|
1825 |
} |
1826 |
|
1827 |
static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs, |
1828 |
ssize_t err) |
1829 |
{ |
1830 |
if (err) {
|
1831 |
err = -errno; |
1832 |
goto out;
|
1833 |
} |
1834 |
err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat); |
1835 |
if (err) {
|
1836 |
goto out;
|
1837 |
} |
1838 |
|
1839 |
vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S", |
1840 |
&vs->v9stat); |
1841 |
if ((vs->len != (vs->v9stat.size + 2)) || |
1842 |
((vs->count + vs->len) > vs->max_count)) { |
1843 |
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
1844 |
v9fs_read_post_seekdir(s, vs, err); |
1845 |
return;
|
1846 |
} |
1847 |
vs->count += vs->len; |
1848 |
v9fs_stat_free(&vs->v9stat); |
1849 |
v9fs_string_free(&vs->name); |
1850 |
vs->dir_pos = vs->dent->d_off; |
1851 |
v9fs_co_readdir(s, vs->fidp, &vs->dent); |
1852 |
v9fs_read_post_readdir(s, vs, err); |
1853 |
return;
|
1854 |
out:
|
1855 |
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
1856 |
v9fs_read_post_seekdir(s, vs, err); |
1857 |
return;
|
1858 |
|
1859 |
} |
1860 |
|
1861 |
static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1862 |
{ |
1863 |
if (vs->dent) {
|
1864 |
memset(&vs->v9stat, 0, sizeof(vs->v9stat)); |
1865 |
v9fs_string_init(&vs->name); |
1866 |
v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data,
|
1867 |
vs->dent->d_name); |
1868 |
err = v9fs_do_lstat(s, &vs->name, &vs->stbuf); |
1869 |
v9fs_read_post_dir_lstat(s, vs, err); |
1870 |
return;
|
1871 |
} |
1872 |
|
1873 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
1874 |
vs->offset += vs->count; |
1875 |
err = vs->offset; |
1876 |
complete_pdu(s, vs->pdu, err); |
1877 |
g_free(vs); |
1878 |
return;
|
1879 |
} |
1880 |
|
1881 |
static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1882 |
{ |
1883 |
v9fs_co_readdir(s, vs->fidp, &vs->dent); |
1884 |
v9fs_read_post_readdir(s, vs, err); |
1885 |
return;
|
1886 |
} |
1887 |
|
1888 |
static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs, |
1889 |
ssize_t err) |
1890 |
{ |
1891 |
vs->dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir); |
1892 |
v9fs_read_post_telldir(s, vs, err); |
1893 |
return;
|
1894 |
} |
1895 |
|
1896 |
static void v9fs_read_post_preadv(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1897 |
{ |
1898 |
if (err < 0) { |
1899 |
/* IO error return the error */
|
1900 |
err = -errno; |
1901 |
goto out;
|
1902 |
} |
1903 |
vs->total += vs->len; |
1904 |
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); |
1905 |
if (vs->total < vs->count && vs->len > 0) { |
1906 |
do {
|
1907 |
if (0) { |
1908 |
print_sg(vs->sg, vs->cnt); |
1909 |
} |
1910 |
vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
1911 |
vs->off); |
1912 |
if (vs->len > 0) { |
1913 |
vs->off += vs->len; |
1914 |
} |
1915 |
} while (vs->len == -1 && errno == EINTR); |
1916 |
if (vs->len == -1) { |
1917 |
err = -errno; |
1918 |
} |
1919 |
v9fs_read_post_preadv(s, vs, err); |
1920 |
return;
|
1921 |
} |
1922 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
1923 |
vs->offset += vs->count; |
1924 |
err = vs->offset; |
1925 |
|
1926 |
out:
|
1927 |
complete_pdu(s, vs->pdu, err); |
1928 |
g_free(vs); |
1929 |
} |
1930 |
|
1931 |
static void v9fs_xattr_read(V9fsState *s, V9fsReadState *vs) |
1932 |
{ |
1933 |
ssize_t err = 0;
|
1934 |
int read_count;
|
1935 |
int64_t xattr_len; |
1936 |
|
1937 |
xattr_len = vs->fidp->fs.xattr.len; |
1938 |
read_count = xattr_len - vs->off; |
1939 |
if (read_count > vs->count) {
|
1940 |
read_count = vs->count; |
1941 |
} else if (read_count < 0) { |
1942 |
/*
|
1943 |
* read beyond XATTR value
|
1944 |
*/
|
1945 |
read_count = 0;
|
1946 |
} |
1947 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", read_count);
|
1948 |
vs->offset += pdu_pack(vs->pdu, vs->offset, |
1949 |
((char *)vs->fidp->fs.xattr.value) + vs->off,
|
1950 |
read_count); |
1951 |
err = vs->offset; |
1952 |
complete_pdu(s, vs->pdu, err); |
1953 |
g_free(vs); |
1954 |
} |
1955 |
|
1956 |
static void v9fs_read(void *opaque) |
1957 |
{ |
1958 |
V9fsPDU *pdu = opaque; |
1959 |
V9fsState *s = pdu->s; |
1960 |
int32_t fid; |
1961 |
V9fsReadState *vs; |
1962 |
ssize_t err = 0;
|
1963 |
|
1964 |
vs = g_malloc(sizeof(*vs));
|
1965 |
vs->pdu = pdu; |
1966 |
vs->offset = 7;
|
1967 |
vs->total = 0;
|
1968 |
vs->len = 0;
|
1969 |
vs->count = 0;
|
1970 |
|
1971 |
pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count);
|
1972 |
|
1973 |
vs->fidp = lookup_fid(s, fid); |
1974 |
if (vs->fidp == NULL) { |
1975 |
err = -EINVAL; |
1976 |
goto out;
|
1977 |
} |
1978 |
|
1979 |
if (vs->fidp->fid_type == P9_FID_DIR) {
|
1980 |
vs->max_count = vs->count; |
1981 |
vs->count = 0;
|
1982 |
if (vs->off == 0) { |
1983 |
v9fs_do_rewinddir(s, vs->fidp->fs.dir); |
1984 |
} |
1985 |
v9fs_read_post_rewinddir(s, vs, err); |
1986 |
return;
|
1987 |
} else if (vs->fidp->fid_type == P9_FID_FILE) { |
1988 |
vs->sg = vs->iov; |
1989 |
pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt); |
1990 |
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
1991 |
if (vs->total <= vs->count) {
|
1992 |
vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
1993 |
vs->off); |
1994 |
if (vs->len > 0) { |
1995 |
vs->off += vs->len; |
1996 |
} |
1997 |
err = vs->len; |
1998 |
v9fs_read_post_preadv(s, vs, err); |
1999 |
} |
2000 |
return;
|
2001 |
} else if (vs->fidp->fid_type == P9_FID_XATTR) { |
2002 |
v9fs_xattr_read(s, vs); |
2003 |
return;
|
2004 |
} else {
|
2005 |
err = -EINVAL; |
2006 |
} |
2007 |
out:
|
2008 |
complete_pdu(s, pdu, err); |
2009 |
g_free(vs); |
2010 |
} |
2011 |
|
2012 |
static size_t v9fs_readdir_data_size(V9fsString *name)
|
2013 |
{ |
2014 |
/*
|
2015 |
* Size of each dirent on the wire: size of qid (13) + size of offset (8)
|
2016 |
* size of type (1) + size of name.size (2) + strlen(name.data)
|
2017 |
*/
|
2018 |
return 24 + v9fs_string_size(name); |
2019 |
} |
2020 |
|
2021 |
static int v9fs_do_readdir(V9fsState *s, V9fsPDU *pdu, |
2022 |
V9fsFidState *fidp, int32_t max_count) |
2023 |
{ |
2024 |
size_t size; |
2025 |
V9fsQID qid; |
2026 |
V9fsString name; |
2027 |
int len, err = 0; |
2028 |
int32_t count = 0;
|
2029 |
off_t saved_dir_pos; |
2030 |
struct dirent *dent;
|
2031 |
|
2032 |
/* save the directory position */
|
2033 |
saved_dir_pos = v9fs_co_telldir(s, fidp); |
2034 |
if (saved_dir_pos < 0) { |
2035 |
return saved_dir_pos;
|
2036 |
} |
2037 |
while (1) { |
2038 |
err = v9fs_co_readdir(s, fidp, &dent); |
2039 |
if (err || !dent) {
|
2040 |
break;
|
2041 |
} |
2042 |
v9fs_string_init(&name); |
2043 |
v9fs_string_sprintf(&name, "%s", dent->d_name);
|
2044 |
if ((count + v9fs_readdir_data_size(&name)) > max_count) {
|
2045 |
/* Ran out of buffer. Set dir back to old position and return */
|
2046 |
v9fs_co_seekdir(s, fidp, saved_dir_pos); |
2047 |
v9fs_string_free(&name); |
2048 |
return count;
|
2049 |
} |
2050 |
/*
|
2051 |
* Fill up just the path field of qid because the client uses
|
2052 |
* only that. To fill the entire qid structure we will have
|
2053 |
* to stat each dirent found, which is expensive
|
2054 |
*/
|
2055 |
size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); |
2056 |
memcpy(&qid.path, &dent->d_ino, size); |
2057 |
/* Fill the other fields with dummy values */
|
2058 |
qid.type = 0;
|
2059 |
qid.version = 0;
|
2060 |
|
2061 |
/* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */
|
2062 |
len = pdu_marshal(pdu, 11 + count, "Qqbs", |
2063 |
&qid, dent->d_off, |
2064 |
dent->d_type, &name); |
2065 |
count += len; |
2066 |
v9fs_string_free(&name); |
2067 |
saved_dir_pos = dent->d_off; |
2068 |
} |
2069 |
if (err < 0) { |
2070 |
return err;
|
2071 |
} |
2072 |
return count;
|
2073 |
} |
2074 |
|
2075 |
static void v9fs_readdir(void *opaque) |
2076 |
{ |
2077 |
int32_t fid; |
2078 |
V9fsFidState *fidp; |
2079 |
ssize_t retval = 0;
|
2080 |
size_t offset = 7;
|
2081 |
int64_t initial_offset; |
2082 |
int32_t count, max_count; |
2083 |
V9fsPDU *pdu = opaque; |
2084 |
V9fsState *s = pdu->s; |
2085 |
|
2086 |
pdu_unmarshal(pdu, offset, "dqd", &fid, &initial_offset, &max_count);
|
2087 |
|
2088 |
fidp = lookup_fid(s, fid); |
2089 |
if (fidp == NULL || !fidp->fs.dir) { |
2090 |
retval = -EINVAL; |
2091 |
goto out;
|
2092 |
} |
2093 |
if (initial_offset == 0) { |
2094 |
v9fs_co_rewinddir(s, fidp); |
2095 |
} else {
|
2096 |
v9fs_co_seekdir(s, fidp, initial_offset); |
2097 |
} |
2098 |
count = v9fs_do_readdir(s, pdu, fidp, max_count); |
2099 |
if (count < 0) { |
2100 |
retval = count; |
2101 |
goto out;
|
2102 |
} |
2103 |
retval = offset; |
2104 |
retval += pdu_marshal(pdu, offset, "d", count);
|
2105 |
retval += count; |
2106 |
out:
|
2107 |
complete_pdu(s, pdu, retval); |
2108 |
} |
2109 |
|
2110 |
static void v9fs_write_post_pwritev(V9fsState *s, V9fsWriteState *vs, |
2111 |
ssize_t err) |
2112 |
{ |
2113 |
if (err < 0) { |
2114 |
/* IO error return the error */
|
2115 |
err = -errno; |
2116 |
goto out;
|
2117 |
} |
2118 |
vs->total += vs->len; |
2119 |
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); |
2120 |
if (vs->total < vs->count && vs->len > 0) { |
2121 |
do {
|
2122 |
if (0) { |
2123 |
print_sg(vs->sg, vs->cnt); |
2124 |
} |
2125 |
vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
2126 |
vs->off); |
2127 |
if (vs->len > 0) { |
2128 |
vs->off += vs->len; |
2129 |
} |
2130 |
} while (vs->len == -1 && errno == EINTR); |
2131 |
if (vs->len == -1) { |
2132 |
err = -errno; |
2133 |
} |
2134 |
v9fs_write_post_pwritev(s, vs, err); |
2135 |
return;
|
2136 |
} |
2137 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
2138 |
err = vs->offset; |
2139 |
out:
|
2140 |
complete_pdu(s, vs->pdu, err); |
2141 |
g_free(vs); |
2142 |
} |
2143 |
|
2144 |
static void v9fs_xattr_write(V9fsState *s, V9fsWriteState *vs) |
2145 |
{ |
2146 |
int i, to_copy;
|
2147 |
ssize_t err = 0;
|
2148 |
int write_count;
|
2149 |
int64_t xattr_len; |
2150 |
|
2151 |
xattr_len = vs->fidp->fs.xattr.len; |
2152 |
write_count = xattr_len - vs->off; |
2153 |
if (write_count > vs->count) {
|
2154 |
write_count = vs->count; |
2155 |
} else if (write_count < 0) { |
2156 |
/*
|
2157 |
* write beyond XATTR value len specified in
|
2158 |
* xattrcreate
|
2159 |
*/
|
2160 |
err = -ENOSPC; |
2161 |
goto out;
|
2162 |
} |
2163 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", write_count);
|
2164 |
err = vs->offset; |
2165 |
vs->fidp->fs.xattr.copied_len += write_count; |
2166 |
/*
|
2167 |
* Now copy the content from sg list
|
2168 |
*/
|
2169 |
for (i = 0; i < vs->cnt; i++) { |
2170 |
if (write_count > vs->sg[i].iov_len) {
|
2171 |
to_copy = vs->sg[i].iov_len; |
2172 |
} else {
|
2173 |
to_copy = write_count; |
2174 |
} |
2175 |
memcpy((char *)vs->fidp->fs.xattr.value + vs->off,
|
2176 |
vs->sg[i].iov_base, to_copy); |
2177 |
/* updating vs->off since we are not using below */
|
2178 |
vs->off += to_copy; |
2179 |
write_count -= to_copy; |
2180 |
} |
2181 |
out:
|
2182 |
complete_pdu(s, vs->pdu, err); |
2183 |
g_free(vs); |
2184 |
} |
2185 |
|
2186 |
static void v9fs_write(void *opaque) |
2187 |
{ |
2188 |
V9fsPDU *pdu = opaque; |
2189 |
V9fsState *s = pdu->s; |
2190 |
int32_t fid; |
2191 |
V9fsWriteState *vs; |
2192 |
ssize_t err; |
2193 |
|
2194 |
vs = g_malloc(sizeof(*vs));
|
2195 |
|
2196 |
vs->pdu = pdu; |
2197 |
vs->offset = 7;
|
2198 |
vs->sg = vs->iov; |
2199 |
vs->total = 0;
|
2200 |
vs->len = 0;
|
2201 |
|
2202 |
pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count,
|
2203 |
vs->sg, &vs->cnt); |
2204 |
|
2205 |
vs->fidp = lookup_fid(s, fid); |
2206 |
if (vs->fidp == NULL) { |
2207 |
err = -EINVAL; |
2208 |
goto out;
|
2209 |
} |
2210 |
|
2211 |
if (vs->fidp->fid_type == P9_FID_FILE) {
|
2212 |
if (vs->fidp->fs.fd == -1) { |
2213 |
err = -EINVAL; |
2214 |
goto out;
|
2215 |
} |
2216 |
} else if (vs->fidp->fid_type == P9_FID_XATTR) { |
2217 |
/*
|
2218 |
* setxattr operation
|
2219 |
*/
|
2220 |
v9fs_xattr_write(s, vs); |
2221 |
return;
|
2222 |
} else {
|
2223 |
err = -EINVAL; |
2224 |
goto out;
|
2225 |
} |
2226 |
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
2227 |
if (vs->total <= vs->count) {
|
2228 |
vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, vs->off); |
2229 |
if (vs->len > 0) { |
2230 |
vs->off += vs->len; |
2231 |
} |
2232 |
err = vs->len; |
2233 |
v9fs_write_post_pwritev(s, vs, err); |
2234 |
} |
2235 |
return;
|
2236 |
out:
|
2237 |
complete_pdu(s, vs->pdu, err); |
2238 |
g_free(vs); |
2239 |
} |
2240 |
|
2241 |
static void v9fs_create_post_getiounit(V9fsState *s, V9fsCreateState *vs) |
2242 |
{ |
2243 |
int err;
|
2244 |
v9fs_string_copy(&vs->fidp->path, &vs->fullname); |
2245 |
stat_to_qid(&vs->stbuf, &vs->qid); |
2246 |
|
2247 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
|
2248 |
err = vs->offset; |
2249 |
|
2250 |
complete_pdu(s, vs->pdu, err); |
2251 |
v9fs_string_free(&vs->name); |
2252 |
v9fs_string_free(&vs->extension); |
2253 |
v9fs_string_free(&vs->fullname); |
2254 |
g_free(vs); |
2255 |
} |
2256 |
|
2257 |
static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err) |
2258 |
{ |
2259 |
if (err == 0) { |
2260 |
vs->iounit = get_iounit(s, &vs->fidp->path); |
2261 |
v9fs_create_post_getiounit(s, vs); |
2262 |
return;
|
2263 |
} |
2264 |
|
2265 |
complete_pdu(s, vs->pdu, err); |
2266 |
v9fs_string_free(&vs->name); |
2267 |
v9fs_string_free(&vs->extension); |
2268 |
v9fs_string_free(&vs->fullname); |
2269 |
g_free(vs); |
2270 |
} |
2271 |
|
2272 |
static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err) |
2273 |
{ |
2274 |
if (err) {
|
2275 |
err = -errno; |
2276 |
} |
2277 |
v9fs_post_create(s, vs, err); |
2278 |
} |
2279 |
|
2280 |
static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs, |
2281 |
int err)
|
2282 |
{ |
2283 |
if (!vs->fidp->fs.dir) {
|
2284 |
err = -errno; |
2285 |
} |
2286 |
vs->fidp->fid_type = P9_FID_DIR; |
2287 |
v9fs_post_create(s, vs, err); |
2288 |
} |
2289 |
|
2290 |
static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs, |
2291 |
int err)
|
2292 |
{ |
2293 |
if (err) {
|
2294 |
err = -errno; |
2295 |
goto out;
|
2296 |
} |
2297 |
|
2298 |
vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fullname); |
2299 |
v9fs_create_post_opendir(s, vs, err); |
2300 |
return;
|
2301 |
|
2302 |
out:
|
2303 |
v9fs_post_create(s, vs, err); |
2304 |
} |
2305 |
|
2306 |
static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err) |
2307 |
{ |
2308 |
if (err < 0) { |
2309 |
goto out;
|
2310 |
} |
2311 |
|
2312 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
2313 |
v9fs_create_post_dir_lstat(s, vs, err); |
2314 |
return;
|
2315 |
|
2316 |
out:
|
2317 |
v9fs_post_create(s, vs, err); |
2318 |
} |
2319 |
|
2320 |
static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err) |
2321 |
{ |
2322 |
if (err) {
|
2323 |
vs->fidp->fid_type = P9_FID_NONE; |
2324 |
close(vs->fidp->fs.fd); |
2325 |
err = -errno; |
2326 |
} |
2327 |
v9fs_post_create(s, vs, err); |
2328 |
return;
|
2329 |
} |
2330 |
|
2331 |
static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err) |
2332 |
{ |
2333 |
if (vs->fidp->fs.fd == -1) { |
2334 |
err = -errno; |
2335 |
goto out;
|
2336 |
} |
2337 |
vs->fidp->fid_type = P9_FID_FILE; |
2338 |
err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); |
2339 |
v9fs_create_post_fstat(s, vs, err); |
2340 |
|
2341 |
return;
|
2342 |
|
2343 |
out:
|
2344 |
v9fs_post_create(s, vs, err); |
2345 |
|
2346 |
} |
2347 |
|
2348 |
static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err) |
2349 |
{ |
2350 |
|
2351 |
if (err == 0 || errno != ENOENT) { |
2352 |
err = -errno; |
2353 |
goto out;
|
2354 |
} |
2355 |
|
2356 |
if (vs->perm & P9_STAT_MODE_DIR) {
|
2357 |
err = v9fs_co_mkdir(s, vs->fullname.data, vs->perm & 0777,
|
2358 |
vs->fidp->uid, -1);
|
2359 |
v9fs_create_post_mkdir(s, vs, err); |
2360 |
} else if (vs->perm & P9_STAT_MODE_SYMLINK) { |
2361 |
err = v9fs_do_symlink(s, vs->fidp, vs->extension.data, |
2362 |
vs->fullname.data, -1);
|
2363 |
v9fs_create_post_perms(s, vs, err); |
2364 |
} else if (vs->perm & P9_STAT_MODE_LINK) { |
2365 |
int32_t nfid = atoi(vs->extension.data); |
2366 |
V9fsFidState *nfidp = lookup_fid(s, nfid); |
2367 |
if (nfidp == NULL) { |
2368 |
err = -errno; |
2369 |
v9fs_post_create(s, vs, err); |
2370 |
} |
2371 |
err = v9fs_do_link(s, &nfidp->path, &vs->fullname); |
2372 |
v9fs_create_post_perms(s, vs, err); |
2373 |
} else if (vs->perm & P9_STAT_MODE_DEVICE) { |
2374 |
char ctype;
|
2375 |
uint32_t major, minor; |
2376 |
mode_t nmode = 0;
|
2377 |
|
2378 |
if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major, |
2379 |
&minor) != 3) {
|
2380 |
err = -errno; |
2381 |
v9fs_post_create(s, vs, err); |
2382 |
} |
2383 |
|
2384 |
switch (ctype) {
|
2385 |
case 'c': |
2386 |
nmode = S_IFCHR; |
2387 |
break;
|
2388 |
case 'b': |
2389 |
nmode = S_IFBLK; |
2390 |
break;
|
2391 |
default:
|
2392 |
err = -EIO; |
2393 |
v9fs_post_create(s, vs, err); |
2394 |
} |
2395 |
|
2396 |
nmode |= vs->perm & 0777;
|
2397 |
err = v9fs_do_mknod(s, vs->fullname.data, nmode, |
2398 |
makedev(major, minor), vs->fidp->uid, -1);
|
2399 |
v9fs_create_post_perms(s, vs, err); |
2400 |
} else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) { |
2401 |
err = v9fs_do_mknod(s, vs->fullname.data, S_IFIFO | (vs->perm & 0777),
|
2402 |
0, vs->fidp->uid, -1); |
2403 |
v9fs_post_create(s, vs, err); |
2404 |
} else if (vs->perm & P9_STAT_MODE_SOCKET) { |
2405 |
err = v9fs_do_mknod(s, vs->fullname.data, S_IFSOCK | (vs->perm & 0777),
|
2406 |
0, vs->fidp->uid, -1); |
2407 |
v9fs_post_create(s, vs, err); |
2408 |
} else {
|
2409 |
vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
2410 |
-1, omode_to_uflags(vs->mode)|O_CREAT, vs->perm);
|
2411 |
|
2412 |
v9fs_create_post_open2(s, vs, err); |
2413 |
} |
2414 |
|
2415 |
return;
|
2416 |
|
2417 |
out:
|
2418 |
v9fs_post_create(s, vs, err); |
2419 |
} |
2420 |
|
2421 |
static void v9fs_create(void *opaque) |
2422 |
{ |
2423 |
V9fsPDU *pdu = opaque; |
2424 |
V9fsState *s = pdu->s; |
2425 |
int32_t fid; |
2426 |
V9fsCreateState *vs; |
2427 |
int err = 0; |
2428 |
|
2429 |
vs = g_malloc(sizeof(*vs));
|
2430 |
vs->pdu = pdu; |
2431 |
vs->offset = 7;
|
2432 |
|
2433 |
v9fs_string_init(&vs->fullname); |
2434 |
|
2435 |
pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name,
|
2436 |
&vs->perm, &vs->mode, &vs->extension); |
2437 |
|
2438 |
vs->fidp = lookup_fid(s, fid); |
2439 |
if (vs->fidp == NULL) { |
2440 |
err = -EINVAL; |
2441 |
goto out;
|
2442 |
} |
2443 |
|
2444 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
|
2445 |
vs->name.data); |
2446 |
|
2447 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
2448 |
v9fs_create_post_lstat(s, vs, err); |
2449 |
return;
|
2450 |
|
2451 |
out:
|
2452 |
complete_pdu(s, vs->pdu, err); |
2453 |
v9fs_string_free(&vs->name); |
2454 |
v9fs_string_free(&vs->extension); |
2455 |
g_free(vs); |
2456 |
} |
2457 |
|
2458 |
static void v9fs_post_symlink(V9fsState *s, V9fsSymlinkState *vs, int err) |
2459 |
{ |
2460 |
if (err == 0) { |
2461 |
stat_to_qid(&vs->stbuf, &vs->qid); |
2462 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
|
2463 |
err = vs->offset; |
2464 |
} else {
|
2465 |
err = -errno; |
2466 |
} |
2467 |
complete_pdu(s, vs->pdu, err); |
2468 |
v9fs_string_free(&vs->name); |
2469 |
v9fs_string_free(&vs->symname); |
2470 |
v9fs_string_free(&vs->fullname); |
2471 |
g_free(vs); |
2472 |
} |
2473 |
|
2474 |
static void v9fs_symlink_post_do_symlink(V9fsState *s, V9fsSymlinkState *vs, |
2475 |
int err)
|
2476 |
{ |
2477 |
if (err) {
|
2478 |
goto out;
|
2479 |
} |
2480 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
2481 |
out:
|
2482 |
v9fs_post_symlink(s, vs, err); |
2483 |
} |
2484 |
|
2485 |
static void v9fs_symlink(void *opaque) |
2486 |
{ |
2487 |
V9fsPDU *pdu = opaque; |
2488 |
V9fsState *s = pdu->s; |
2489 |
int32_t dfid; |
2490 |
V9fsSymlinkState *vs; |
2491 |
int err = 0; |
2492 |
gid_t gid; |
2493 |
|
2494 |
vs = g_malloc(sizeof(*vs));
|
2495 |
vs->pdu = pdu; |
2496 |
vs->offset = 7;
|
2497 |
|
2498 |
v9fs_string_init(&vs->fullname); |
2499 |
|
2500 |
pdu_unmarshal(vs->pdu, vs->offset, "dssd", &dfid, &vs->name,
|
2501 |
&vs->symname, &gid); |
2502 |
|
2503 |
vs->dfidp = lookup_fid(s, dfid); |
2504 |
if (vs->dfidp == NULL) { |
2505 |
err = -EINVAL; |
2506 |
goto out;
|
2507 |
} |
2508 |
|
2509 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->dfidp->path.data,
|
2510 |
vs->name.data); |
2511 |
err = v9fs_do_symlink(s, vs->dfidp, vs->symname.data, |
2512 |
vs->fullname.data, gid); |
2513 |
v9fs_symlink_post_do_symlink(s, vs, err); |
2514 |
return;
|
2515 |
|
2516 |
out:
|
2517 |
complete_pdu(s, vs->pdu, err); |
2518 |
v9fs_string_free(&vs->name); |
2519 |
v9fs_string_free(&vs->symname); |
2520 |
g_free(vs); |
2521 |
} |
2522 |
|
2523 |
static void v9fs_flush(void *opaque) |
2524 |
{ |
2525 |
V9fsPDU *pdu = opaque; |
2526 |
V9fsState *s = pdu->s; |
2527 |
/* A nop call with no return */
|
2528 |
complete_pdu(s, pdu, 7);
|
2529 |
return;
|
2530 |
} |
2531 |
|
2532 |
static void v9fs_link(void *opaque) |
2533 |
{ |
2534 |
V9fsPDU *pdu = opaque; |
2535 |
V9fsState *s = pdu->s; |
2536 |
int32_t dfid, oldfid; |
2537 |
V9fsFidState *dfidp, *oldfidp; |
2538 |
V9fsString name, fullname; |
2539 |
size_t offset = 7;
|
2540 |
int err = 0; |
2541 |
|
2542 |
v9fs_string_init(&fullname); |
2543 |
|
2544 |
pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name);
|
2545 |
|
2546 |
dfidp = lookup_fid(s, dfid); |
2547 |
if (dfidp == NULL) { |
2548 |
err = -errno; |
2549 |
goto out;
|
2550 |
} |
2551 |
|
2552 |
oldfidp = lookup_fid(s, oldfid); |
2553 |
if (oldfidp == NULL) { |
2554 |
err = -errno; |
2555 |
goto out;
|
2556 |
} |
2557 |
|
2558 |
v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data);
|
2559 |
err = offset; |
2560 |
err = v9fs_do_link(s, &oldfidp->path, &fullname); |
2561 |
if (err) {
|
2562 |
err = -errno; |
2563 |
} |
2564 |
v9fs_string_free(&fullname); |
2565 |
|
2566 |
out:
|
2567 |
v9fs_string_free(&name); |
2568 |
complete_pdu(s, pdu, err); |
2569 |
} |
2570 |
|
2571 |
static void v9fs_remove(void *opaque) |
2572 |
{ |
2573 |
int32_t fid; |
2574 |
int err = 0; |
2575 |
size_t offset = 7;
|
2576 |
V9fsFidState *fidp; |
2577 |
V9fsPDU *pdu = opaque; |
2578 |
|
2579 |
pdu_unmarshal(pdu, offset, "d", &fid);
|
2580 |
|
2581 |
fidp = lookup_fid(pdu->s, fid); |
2582 |
if (fidp == NULL) { |
2583 |
err = -EINVAL; |
2584 |
goto out;
|
2585 |
} |
2586 |
err = v9fs_co_remove(pdu->s, &fidp->path); |
2587 |
if (!err) {
|
2588 |
err = offset; |
2589 |
} |
2590 |
|
2591 |
/* For TREMOVE we need to clunk the fid even on failed remove */
|
2592 |
free_fid(pdu->s, fidp->fid); |
2593 |
out:
|
2594 |
complete_pdu(pdu->s, pdu, err); |
2595 |
} |
2596 |
|
2597 |
static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err) |
2598 |
{ |
2599 |
if (err < 0) { |
2600 |
goto out;
|
2601 |
} |
2602 |
|
2603 |
err = vs->offset; |
2604 |
|
2605 |
out:
|
2606 |
v9fs_stat_free(&vs->v9stat); |
2607 |
complete_pdu(s, vs->pdu, err); |
2608 |
g_free(vs); |
2609 |
} |
2610 |
|
2611 |
static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err) |
2612 |
{ |
2613 |
if (err < 0) { |
2614 |
goto out;
|
2615 |
} |
2616 |
if (vs->v9stat.length != -1) { |
2617 |
if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) { |
2618 |
err = -errno; |
2619 |
} |
2620 |
} |
2621 |
v9fs_wstat_post_truncate(s, vs, err); |
2622 |
return;
|
2623 |
|
2624 |
out:
|
2625 |
v9fs_stat_free(&vs->v9stat); |
2626 |
complete_pdu(s, vs->pdu, err); |
2627 |
g_free(vs); |
2628 |
} |
2629 |
|
2630 |
static int v9fs_complete_rename(V9fsState *s, V9fsFidState *fidp, |
2631 |
int32_t newdirfid, V9fsString *name) |
2632 |
{ |
2633 |
char *end;
|
2634 |
int err = 0; |
2635 |
char *old_name, *new_name;
|
2636 |
|
2637 |
if (newdirfid != -1) { |
2638 |
V9fsFidState *dirfidp; |
2639 |
dirfidp = lookup_fid(s, newdirfid); |
2640 |
if (dirfidp == NULL) { |
2641 |
err = -ENOENT; |
2642 |
goto out;
|
2643 |
} |
2644 |
BUG_ON(dirfidp->fid_type != P9_FID_NONE); |
2645 |
|
2646 |
new_name = g_malloc0(dirfidp->path.size + name->size + 2);
|
2647 |
|
2648 |
strcpy(new_name, dirfidp->path.data); |
2649 |
strcat(new_name, "/");
|
2650 |
strcat(new_name + dirfidp->path.size, name->data); |
2651 |
} else {
|
2652 |
old_name = fidp->path.data; |
2653 |
end = strrchr(old_name, '/');
|
2654 |
if (end) {
|
2655 |
end++; |
2656 |
} else {
|
2657 |
end = old_name; |
2658 |
} |
2659 |
new_name = g_malloc0(end - old_name + name->size + 1);
|
2660 |
|
2661 |
strncat(new_name, old_name, end - old_name); |
2662 |
strncat(new_name + (end - old_name), name->data, name->size); |
2663 |
} |
2664 |
|
2665 |
v9fs_string_free(name); |
2666 |
name->data = new_name; |
2667 |
name->size = strlen(new_name); |
2668 |
|
2669 |
if (strcmp(new_name, fidp->path.data) != 0) { |
2670 |
err = v9fs_co_rename(s, &fidp->path, name); |
2671 |
if (err < 0) { |
2672 |
goto out;
|
2673 |
} |
2674 |
V9fsFidState *tfidp; |
2675 |
/*
|
2676 |
* Fixup fid's pointing to the old name to
|
2677 |
* start pointing to the new name
|
2678 |
*/
|
2679 |
for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) {
|
2680 |
if (fidp == tfidp) {
|
2681 |
/*
|
2682 |
* we replace name of this fid towards the end
|
2683 |
* so that our below strcmp will work
|
2684 |
*/
|
2685 |
continue;
|
2686 |
} |
2687 |
if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) {
|
2688 |
/* replace the name */
|
2689 |
v9fs_fix_path(&tfidp->path, name, strlen(fidp->path.data)); |
2690 |
} |
2691 |
} |
2692 |
v9fs_string_copy(&fidp->path, name); |
2693 |
} |
2694 |
out:
|
2695 |
return err;
|
2696 |
} |
2697 |
|
2698 |
static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err) |
2699 |
{ |
2700 |
if (err < 0) { |
2701 |
goto out;
|
2702 |
} |
2703 |
|
2704 |
if (vs->v9stat.name.size != 0) { |
2705 |
err = v9fs_complete_rename(s, vs->fidp, -1, &vs->v9stat.name);
|
2706 |
} |
2707 |
v9fs_wstat_post_rename(s, vs, err); |
2708 |
return;
|
2709 |
|
2710 |
out:
|
2711 |
v9fs_stat_free(&vs->v9stat); |
2712 |
complete_pdu(s, vs->pdu, err); |
2713 |
g_free(vs); |
2714 |
} |
2715 |
|
2716 |
static void v9fs_rename(void *opaque) |
2717 |
{ |
2718 |
int32_t fid; |
2719 |
ssize_t err = 0;
|
2720 |
size_t offset = 7;
|
2721 |
V9fsString name; |
2722 |
int32_t newdirfid; |
2723 |
V9fsFidState *fidp; |
2724 |
V9fsPDU *pdu = opaque; |
2725 |
V9fsState *s = pdu->s; |
2726 |
|
2727 |
pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name);
|
2728 |
|
2729 |
fidp = lookup_fid(s, fid); |
2730 |
if (fidp == NULL) { |
2731 |
err = -ENOENT; |
2732 |
goto out;
|
2733 |
} |
2734 |
BUG_ON(fidp->fid_type != P9_FID_NONE); |
2735 |
|
2736 |
err = v9fs_complete_rename(s, fidp, newdirfid, &name); |
2737 |
if (!err) {
|
2738 |
err = offset; |
2739 |
} |
2740 |
out:
|
2741 |
complete_pdu(s, pdu, err); |
2742 |
v9fs_string_free(&name); |
2743 |
} |
2744 |
|
2745 |
static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err) |
2746 |
{ |
2747 |
if (err < 0) { |
2748 |
goto out;
|
2749 |
} |
2750 |
|
2751 |
if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) { |
2752 |
if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid,
|
2753 |
vs->v9stat.n_gid)) { |
2754 |
err = -errno; |
2755 |
} |
2756 |
} |
2757 |
v9fs_wstat_post_chown(s, vs, err); |
2758 |
return;
|
2759 |
|
2760 |
out:
|
2761 |
v9fs_stat_free(&vs->v9stat); |
2762 |
complete_pdu(s, vs->pdu, err); |
2763 |
g_free(vs); |
2764 |
} |
2765 |
|
2766 |
static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err) |
2767 |
{ |
2768 |
if (err < 0) { |
2769 |
goto out;
|
2770 |
} |
2771 |
|
2772 |
if (vs->v9stat.mtime != -1 || vs->v9stat.atime != -1) { |
2773 |
struct timespec times[2]; |
2774 |
if (vs->v9stat.atime != -1) { |
2775 |
times[0].tv_sec = vs->v9stat.atime;
|
2776 |
times[0].tv_nsec = 0; |
2777 |
} else {
|
2778 |
times[0].tv_nsec = UTIME_OMIT;
|
2779 |
} |
2780 |
if (vs->v9stat.mtime != -1) { |
2781 |
times[1].tv_sec = vs->v9stat.mtime;
|
2782 |
times[1].tv_nsec = 0; |
2783 |
} else {
|
2784 |
times[1].tv_nsec = UTIME_OMIT;
|
2785 |
} |
2786 |
|
2787 |
if (v9fs_do_utimensat(s, &vs->fidp->path, times)) {
|
2788 |
err = -errno; |
2789 |
} |
2790 |
} |
2791 |
|
2792 |
v9fs_wstat_post_utime(s, vs, err); |
2793 |
return;
|
2794 |
|
2795 |
out:
|
2796 |
v9fs_stat_free(&vs->v9stat); |
2797 |
complete_pdu(s, vs->pdu, err); |
2798 |
g_free(vs); |
2799 |
} |
2800 |
|
2801 |
static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err) |
2802 |
{ |
2803 |
if (err == -1) { |
2804 |
err = -errno; |
2805 |
} |
2806 |
v9fs_stat_free(&vs->v9stat); |
2807 |
complete_pdu(s, vs->pdu, err); |
2808 |
g_free(vs); |
2809 |
} |
2810 |
|
2811 |
static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err) |
2812 |
{ |
2813 |
uint32_t v9_mode; |
2814 |
|
2815 |
if (err == -1) { |
2816 |
err = -errno; |
2817 |
goto out;
|
2818 |
} |
2819 |
|
2820 |
v9_mode = stat_to_v9mode(&vs->stbuf); |
2821 |
|
2822 |
if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) !=
|
2823 |
(v9_mode & P9_STAT_MODE_TYPE_BITS)) { |
2824 |
/* Attempting to change the type */
|
2825 |
err = -EIO; |
2826 |
goto out;
|
2827 |
} |
2828 |
|
2829 |
if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode,
|
2830 |
&vs->v9stat.extension))) { |
2831 |
err = -errno; |
2832 |
} |
2833 |
v9fs_wstat_post_chmod(s, vs, err); |
2834 |
return;
|
2835 |
|
2836 |
out:
|
2837 |
v9fs_stat_free(&vs->v9stat); |
2838 |
complete_pdu(s, vs->pdu, err); |
2839 |
g_free(vs); |
2840 |
} |
2841 |
|
2842 |
static void v9fs_wstat(void *opaque) |
2843 |
{ |
2844 |
V9fsPDU *pdu = opaque; |
2845 |
V9fsState *s = pdu->s; |
2846 |
int32_t fid; |
2847 |
V9fsWstatState *vs; |
2848 |
int err = 0; |
2849 |
|
2850 |
vs = g_malloc(sizeof(*vs));
|
2851 |
vs->pdu = pdu; |
2852 |
vs->offset = 7;
|
2853 |
|
2854 |
pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat);
|
2855 |
|
2856 |
vs->fidp = lookup_fid(s, fid); |
2857 |
if (vs->fidp == NULL) { |
2858 |
err = -EINVAL; |
2859 |
goto out;
|
2860 |
} |
2861 |
|
2862 |
/* do we need to sync the file? */
|
2863 |
if (donttouch_stat(&vs->v9stat)) {
|
2864 |
err = v9fs_do_fsync(s, vs->fidp->fs.fd, 0);
|
2865 |
v9fs_wstat_post_fsync(s, vs, err); |
2866 |
return;
|
2867 |
} |
2868 |
|
2869 |
if (vs->v9stat.mode != -1) { |
2870 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
2871 |
v9fs_wstat_post_lstat(s, vs, err); |
2872 |
return;
|
2873 |
} |
2874 |
|
2875 |
v9fs_wstat_post_chmod(s, vs, err); |
2876 |
return;
|
2877 |
|
2878 |
out:
|
2879 |
v9fs_stat_free(&vs->v9stat); |
2880 |
complete_pdu(s, vs->pdu, err); |
2881 |
g_free(vs); |
2882 |
} |
2883 |
|
2884 |
static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) |
2885 |
{ |
2886 |
uint32_t f_type; |
2887 |
uint32_t f_bsize; |
2888 |
uint64_t f_blocks; |
2889 |
uint64_t f_bfree; |
2890 |
uint64_t f_bavail; |
2891 |
uint64_t f_files; |
2892 |
uint64_t f_ffree; |
2893 |
uint64_t fsid_val; |
2894 |
uint32_t f_namelen; |
2895 |
size_t offset = 7;
|
2896 |
int32_t bsize_factor; |
2897 |
|
2898 |
/*
|
2899 |
* compute bsize factor based on host file system block size
|
2900 |
* and client msize
|
2901 |
*/
|
2902 |
bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; |
2903 |
if (!bsize_factor) {
|
2904 |
bsize_factor = 1;
|
2905 |
} |
2906 |
f_type = stbuf->f_type; |
2907 |
f_bsize = stbuf->f_bsize; |
2908 |
f_bsize *= bsize_factor; |
2909 |
/*
|
2910 |
* f_bsize is adjusted(multiplied) by bsize factor, so we need to
|
2911 |
* adjust(divide) the number of blocks, free blocks and available
|
2912 |
* blocks by bsize factor
|
2913 |
*/
|
2914 |
f_blocks = stbuf->f_blocks/bsize_factor; |
2915 |
f_bfree = stbuf->f_bfree/bsize_factor; |
2916 |
f_bavail = stbuf->f_bavail/bsize_factor; |
2917 |
f_files = stbuf->f_files; |
2918 |
f_ffree = stbuf->f_ffree; |
2919 |
fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | |
2920 |
(unsigned long long)stbuf->f_fsid.__val[1] << 32; |
2921 |
f_namelen = stbuf->f_namelen; |
2922 |
|
2923 |
return pdu_marshal(pdu, offset, "ddqqqqqqd", |
2924 |
f_type, f_bsize, f_blocks, f_bfree, |
2925 |
f_bavail, f_files, f_ffree, |
2926 |
fsid_val, f_namelen); |
2927 |
} |
2928 |
|
2929 |
static void v9fs_statfs(void *opaque) |
2930 |
{ |
2931 |
int32_t fid; |
2932 |
ssize_t retval = 0;
|
2933 |
size_t offset = 7;
|
2934 |
V9fsFidState *fidp; |
2935 |
struct statfs stbuf;
|
2936 |
V9fsPDU *pdu = opaque; |
2937 |
V9fsState *s = pdu->s; |
2938 |
|
2939 |
pdu_unmarshal(pdu, offset, "d", &fid);
|
2940 |
fidp = lookup_fid(s, fid); |
2941 |
if (fidp == NULL) { |
2942 |
retval = -ENOENT; |
2943 |
goto out;
|
2944 |
} |
2945 |
retval = v9fs_co_statfs(s, &fidp->path, &stbuf); |
2946 |
if (retval < 0) { |
2947 |
goto out;
|
2948 |
} |
2949 |
retval = offset; |
2950 |
retval += v9fs_fill_statfs(s, pdu, &stbuf); |
2951 |
out:
|
2952 |
complete_pdu(s, pdu, retval); |
2953 |
return;
|
2954 |
} |
2955 |
|
2956 |
static void v9fs_mknod(void *opaque) |
2957 |
{ |
2958 |
|
2959 |
int mode;
|
2960 |
gid_t gid; |
2961 |
int32_t fid; |
2962 |
V9fsQID qid; |
2963 |
int err = 0; |
2964 |
int major, minor;
|
2965 |
size_t offset = 7;
|
2966 |
V9fsString name; |
2967 |
struct stat stbuf;
|
2968 |
V9fsString fullname; |
2969 |
V9fsFidState *fidp; |
2970 |
V9fsPDU *pdu = opaque; |
2971 |
V9fsState *s = pdu->s; |
2972 |
|
2973 |
v9fs_string_init(&fullname); |
2974 |
pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode,
|
2975 |
&major, &minor, &gid); |
2976 |
|
2977 |
fidp = lookup_fid(s, fid); |
2978 |
if (fidp == NULL) { |
2979 |
err = -ENOENT; |
2980 |
goto out;
|
2981 |
} |
2982 |
v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data);
|
2983 |
err = v9fs_co_mknod(s, &fullname, fidp->uid, gid, |
2984 |
makedev(major, minor), mode); |
2985 |
if (err < 0) { |
2986 |
goto out;
|
2987 |
} |
2988 |
err = v9fs_co_lstat(s, &fullname, &stbuf); |
2989 |
if (err < 0) { |
2990 |
goto out;
|
2991 |
} |
2992 |
stat_to_qid(&stbuf, &qid); |
2993 |
err = offset; |
2994 |
err += pdu_marshal(pdu, offset, "Q", &qid);
|
2995 |
out:
|
2996 |
complete_pdu(s, pdu, err); |
2997 |
v9fs_string_free(&fullname); |
2998 |
v9fs_string_free(&name); |
2999 |
} |
3000 |
|
3001 |
/*
|
3002 |
* Implement posix byte range locking code
|
3003 |
* Server side handling of locking code is very simple, because 9p server in
|
3004 |
* QEMU can handle only one client. And most of the lock handling
|
3005 |
* (like conflict, merging) etc is done by the VFS layer itself, so no need to
|
3006 |
* do any thing in * qemu 9p server side lock code path.
|
3007 |
* So when a TLOCK request comes, always return success
|
3008 |
*/
|
3009 |
static void v9fs_lock(void *opaque) |
3010 |
{ |
3011 |
int8_t status; |
3012 |
V9fsFlock *flock; |
3013 |
size_t offset = 7;
|
3014 |
struct stat stbuf;
|
3015 |
V9fsFidState *fidp; |
3016 |
int32_t fid, err = 0;
|
3017 |
V9fsPDU *pdu = opaque; |
3018 |
V9fsState *s = pdu->s; |
3019 |
|
3020 |
flock = g_malloc(sizeof(*flock));
|
3021 |
pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock->type,
|
3022 |
&flock->flags, &flock->start, &flock->length, |
3023 |
&flock->proc_id, &flock->client_id); |
3024 |
status = P9_LOCK_ERROR; |
3025 |
|
3026 |
/* We support only block flag now (that too ignored currently) */
|
3027 |
if (flock->flags & ~P9_LOCK_FLAGS_BLOCK) {
|
3028 |
err = -EINVAL; |
3029 |
goto out;
|
3030 |
} |
3031 |
fidp = lookup_fid(s, fid); |
3032 |
if (fidp == NULL) { |
3033 |
err = -ENOENT; |
3034 |
goto out;
|
3035 |
} |
3036 |
err = v9fs_co_fstat(s, fidp->fs.fd, &stbuf); |
3037 |
if (err < 0) { |
3038 |
goto out;
|
3039 |
} |
3040 |
status = P9_LOCK_SUCCESS; |
3041 |
out:
|
3042 |
err = offset; |
3043 |
err += pdu_marshal(pdu, offset, "b", status);
|
3044 |
complete_pdu(s, pdu, err); |
3045 |
g_free(flock); |
3046 |
} |
3047 |
|
3048 |
/*
|
3049 |
* When a TGETLOCK request comes, always return success because all lock
|
3050 |
* handling is done by client's VFS layer.
|
3051 |
*/
|
3052 |
static void v9fs_getlock(void *opaque) |
3053 |
{ |
3054 |
size_t offset = 7;
|
3055 |
struct stat stbuf;
|
3056 |
V9fsFidState *fidp; |
3057 |
V9fsGetlock *glock; |
3058 |
int32_t fid, err = 0;
|
3059 |
V9fsPDU *pdu = opaque; |
3060 |
V9fsState *s = pdu->s; |
3061 |
|
3062 |
glock = g_malloc(sizeof(*glock));
|
3063 |
pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock->type,
|
3064 |
&glock->start, &glock->length, &glock->proc_id, |
3065 |
&glock->client_id); |
3066 |
|
3067 |
fidp = lookup_fid(s, fid); |
3068 |
if (fidp == NULL) { |
3069 |
err = -ENOENT; |
3070 |
goto out;
|
3071 |
} |
3072 |
err = v9fs_co_fstat(s, fidp->fs.fd, &stbuf); |
3073 |
if (err < 0) { |
3074 |
goto out;
|
3075 |
} |
3076 |
glock->type = F_UNLCK; |
3077 |
offset += pdu_marshal(pdu, offset, "bqqds", glock->type,
|
3078 |
glock->start, glock->length, glock->proc_id, |
3079 |
&glock->client_id); |
3080 |
err = offset; |
3081 |
out:
|
3082 |
complete_pdu(s, pdu, err); |
3083 |
g_free(glock); |
3084 |
} |
3085 |
|
3086 |
static void v9fs_mkdir(void *opaque) |
3087 |
{ |
3088 |
V9fsPDU *pdu = opaque; |
3089 |
size_t offset = 7;
|
3090 |
int32_t fid; |
3091 |
struct stat stbuf;
|
3092 |
V9fsString name, fullname; |
3093 |
V9fsQID qid; |
3094 |
V9fsFidState *fidp; |
3095 |
gid_t gid; |
3096 |
int mode;
|
3097 |
int err = 0; |
3098 |
|
3099 |
v9fs_string_init(&fullname); |
3100 |
pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid);
|
3101 |
|
3102 |
fidp = lookup_fid(pdu->s, fid); |
3103 |
if (fidp == NULL) { |
3104 |
err = -ENOENT; |
3105 |
goto out;
|
3106 |
} |
3107 |
v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data);
|
3108 |
err = v9fs_co_mkdir(pdu->s, fullname.data, mode, fidp->uid, gid); |
3109 |
if (err < 0) { |
3110 |
goto out;
|
3111 |
} |
3112 |
err = v9fs_co_lstat(pdu->s, &fullname, &stbuf); |
3113 |
if (err < 0) { |
3114 |
goto out;
|
3115 |
} |
3116 |
stat_to_qid(&stbuf, &qid); |
3117 |
offset += pdu_marshal(pdu, offset, "Q", &qid);
|
3118 |
err = offset; |
3119 |
out:
|
3120 |
complete_pdu(pdu->s, pdu, err); |
3121 |
v9fs_string_free(&fullname); |
3122 |
v9fs_string_free(&name); |
3123 |
} |
3124 |
|
3125 |
static void v9fs_xattrwalk(void *opaque) |
3126 |
{ |
3127 |
int64_t size; |
3128 |
V9fsString name; |
3129 |
ssize_t err = 0;
|
3130 |
size_t offset = 7;
|
3131 |
int32_t fid, newfid; |
3132 |
V9fsFidState *file_fidp; |
3133 |
V9fsFidState *xattr_fidp; |
3134 |
V9fsPDU *pdu = opaque; |
3135 |
V9fsState *s = pdu->s; |
3136 |
|
3137 |
pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name);
|
3138 |
file_fidp = lookup_fid(s, fid); |
3139 |
if (file_fidp == NULL) { |
3140 |
err = -ENOENT; |
3141 |
goto out;
|
3142 |
} |
3143 |
xattr_fidp = alloc_fid(s, newfid); |
3144 |
if (xattr_fidp == NULL) { |
3145 |
err = -EINVAL; |
3146 |
goto out;
|
3147 |
} |
3148 |
v9fs_string_copy(&xattr_fidp->path, &file_fidp->path); |
3149 |
if (name.data[0] == 0) { |
3150 |
/*
|
3151 |
* listxattr request. Get the size first
|
3152 |
*/
|
3153 |
size = v9fs_co_llistxattr(s, &xattr_fidp->path, NULL, 0); |
3154 |
if (size < 0) { |
3155 |
err = size; |
3156 |
free_fid(s, xattr_fidp->fid); |
3157 |
goto out;
|
3158 |
} |
3159 |
/*
|
3160 |
* Read the xattr value
|
3161 |
*/
|
3162 |
xattr_fidp->fs.xattr.len = size; |
3163 |
xattr_fidp->fid_type = P9_FID_XATTR; |
3164 |
xattr_fidp->fs.xattr.copied_len = -1;
|
3165 |
if (size) {
|
3166 |
xattr_fidp->fs.xattr.value = g_malloc(size); |
3167 |
err = v9fs_co_llistxattr(s, &xattr_fidp->path, |
3168 |
xattr_fidp->fs.xattr.value, |
3169 |
xattr_fidp->fs.xattr.len); |
3170 |
if (err < 0) { |
3171 |
free_fid(s, xattr_fidp->fid); |
3172 |
goto out;
|
3173 |
} |
3174 |
} |
3175 |
offset += pdu_marshal(pdu, offset, "q", size);
|
3176 |
err = offset; |
3177 |
} else {
|
3178 |
/*
|
3179 |
* specific xattr fid. We check for xattr
|
3180 |
* presence also collect the xattr size
|
3181 |
*/
|
3182 |
size = v9fs_co_lgetxattr(s, &xattr_fidp->path, |
3183 |
&name, NULL, 0); |
3184 |
if (size < 0) { |
3185 |
err = size; |
3186 |
free_fid(s, xattr_fidp->fid); |
3187 |
goto out;
|
3188 |
} |
3189 |
/*
|
3190 |
* Read the xattr value
|
3191 |
*/
|
3192 |
xattr_fidp->fs.xattr.len = size; |
3193 |
xattr_fidp->fid_type = P9_FID_XATTR; |
3194 |
xattr_fidp->fs.xattr.copied_len = -1;
|
3195 |
if (size) {
|
3196 |
xattr_fidp->fs.xattr.value = g_malloc(size); |
3197 |
err = v9fs_co_lgetxattr(s, &xattr_fidp->path, |
3198 |
&name, xattr_fidp->fs.xattr.value, |
3199 |
xattr_fidp->fs.xattr.len); |
3200 |
if (err < 0) { |
3201 |
free_fid(s, xattr_fidp->fid); |
3202 |
goto out;
|
3203 |
} |
3204 |
} |
3205 |
offset += pdu_marshal(pdu, offset, "q", size);
|
3206 |
err = offset; |
3207 |
} |
3208 |
out:
|
3209 |
complete_pdu(s, pdu, err); |
3210 |
v9fs_string_free(&name); |
3211 |
} |
3212 |
|
3213 |
static void v9fs_xattrcreate(void *opaque) |
3214 |
{ |
3215 |
int flags;
|
3216 |
int32_t fid; |
3217 |
int64_t size; |
3218 |
ssize_t err = 0;
|
3219 |
V9fsString name; |
3220 |
size_t offset = 7;
|
3221 |
V9fsFidState *file_fidp; |
3222 |
V9fsFidState *xattr_fidp; |
3223 |
V9fsPDU *pdu = opaque; |
3224 |
V9fsState *s = pdu->s; |
3225 |
|
3226 |
pdu_unmarshal(pdu, offset, "dsqd",
|
3227 |
&fid, &name, &size, &flags); |
3228 |
|
3229 |
file_fidp = lookup_fid(s, fid); |
3230 |
if (file_fidp == NULL) { |
3231 |
err = -EINVAL; |
3232 |
goto out;
|
3233 |
} |
3234 |
/* Make the file fid point to xattr */
|
3235 |
xattr_fidp = file_fidp; |
3236 |
xattr_fidp->fid_type = P9_FID_XATTR; |
3237 |
xattr_fidp->fs.xattr.copied_len = 0;
|
3238 |
xattr_fidp->fs.xattr.len = size; |
3239 |
xattr_fidp->fs.xattr.flags = flags; |
3240 |
v9fs_string_init(&xattr_fidp->fs.xattr.name); |
3241 |
v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); |
3242 |
if (size) {
|
3243 |
xattr_fidp->fs.xattr.value = g_malloc(size); |
3244 |
} else {
|
3245 |
xattr_fidp->fs.xattr.value = NULL;
|
3246 |
} |
3247 |
err = offset; |
3248 |
out:
|
3249 |
complete_pdu(s, pdu, err); |
3250 |
v9fs_string_free(&name); |
3251 |
} |
3252 |
|
3253 |
static void v9fs_readlink(void *opaque) |
3254 |
{ |
3255 |
V9fsPDU *pdu = opaque; |
3256 |
size_t offset = 7;
|
3257 |
V9fsString target; |
3258 |
int32_t fid; |
3259 |
int err = 0; |
3260 |
V9fsFidState *fidp; |
3261 |
|
3262 |
pdu_unmarshal(pdu, offset, "d", &fid);
|
3263 |
fidp = lookup_fid(pdu->s, fid); |
3264 |
if (fidp == NULL) { |
3265 |
err = -ENOENT; |
3266 |
goto out;
|
3267 |
} |
3268 |
|
3269 |
v9fs_string_init(&target); |
3270 |
err = v9fs_co_readlink(pdu->s, &fidp->path, &target); |
3271 |
if (err < 0) { |
3272 |
goto out;
|
3273 |
} |
3274 |
offset += pdu_marshal(pdu, offset, "s", &target);
|
3275 |
err = offset; |
3276 |
v9fs_string_free(&target); |
3277 |
out:
|
3278 |
complete_pdu(pdu->s, pdu, err); |
3279 |
} |
3280 |
|
3281 |
static CoroutineEntry *pdu_co_handlers[] = {
|
3282 |
[P9_TREADDIR] = v9fs_readdir, |
3283 |
[P9_TSTATFS] = v9fs_statfs, |
3284 |
[P9_TGETATTR] = v9fs_getattr, |
3285 |
[P9_TSETATTR] = v9fs_setattr, |
3286 |
[P9_TXATTRWALK] = v9fs_xattrwalk, |
3287 |
[P9_TXATTRCREATE] = v9fs_xattrcreate, |
3288 |
[P9_TMKNOD] = v9fs_mknod, |
3289 |
[P9_TRENAME] = v9fs_rename, |
3290 |
[P9_TLOCK] = v9fs_lock, |
3291 |
[P9_TGETLOCK] = v9fs_getlock, |
3292 |
[P9_TREADLINK] = v9fs_readlink, |
3293 |
[P9_TMKDIR] = v9fs_mkdir, |
3294 |
[P9_TVERSION] = v9fs_version, |
3295 |
[P9_TLOPEN] = v9fs_open, |
3296 |
[P9_TATTACH] = v9fs_attach, |
3297 |
[P9_TSTAT] = v9fs_stat, |
3298 |
[P9_TWALK] = v9fs_walk, |
3299 |
[P9_TCLUNK] = v9fs_clunk, |
3300 |
[P9_TFSYNC] = v9fs_fsync, |
3301 |
[P9_TOPEN] = v9fs_open, |
3302 |
[P9_TREAD] = v9fs_read, |
3303 |
#if 0
|
3304 |
[P9_TAUTH] = v9fs_auth,
|
3305 |
#endif
|
3306 |
[P9_TFLUSH] = v9fs_flush, |
3307 |
[P9_TLINK] = v9fs_link, |
3308 |
[P9_TSYMLINK] = v9fs_symlink, |
3309 |
[P9_TCREATE] = v9fs_create, |
3310 |
[P9_TLCREATE] = v9fs_lcreate, |
3311 |
[P9_TWRITE] = v9fs_write, |
3312 |
[P9_TWSTAT] = v9fs_wstat, |
3313 |
[P9_TREMOVE] = v9fs_remove, |
3314 |
}; |
3315 |
|
3316 |
static void v9fs_op_not_supp(void *opaque) |
3317 |
{ |
3318 |
V9fsPDU *pdu = opaque; |
3319 |
complete_pdu(pdu->s, pdu, -EOPNOTSUPP); |
3320 |
} |
3321 |
|
3322 |
static void submit_pdu(V9fsState *s, V9fsPDU *pdu) |
3323 |
{ |
3324 |
Coroutine *co; |
3325 |
CoroutineEntry *handler; |
3326 |
|
3327 |
if (debug_9p_pdu) {
|
3328 |
pprint_pdu(pdu); |
3329 |
} |
3330 |
if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) ||
|
3331 |
(pdu_co_handlers[pdu->id] == NULL)) {
|
3332 |
handler = v9fs_op_not_supp; |
3333 |
} else {
|
3334 |
handler = pdu_co_handlers[pdu->id]; |
3335 |
} |
3336 |
co = qemu_coroutine_create(handler); |
3337 |
qemu_coroutine_enter(co, pdu); |
3338 |
} |
3339 |
|
3340 |
void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
|
3341 |
{ |
3342 |
V9fsState *s = (V9fsState *)vdev; |
3343 |
V9fsPDU *pdu; |
3344 |
ssize_t len; |
3345 |
|
3346 |
while ((pdu = alloc_pdu(s)) &&
|
3347 |
(len = virtqueue_pop(vq, &pdu->elem)) != 0) {
|
3348 |
uint8_t *ptr; |
3349 |
pdu->s = s; |
3350 |
BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); |
3351 |
BUG_ON(pdu->elem.out_sg[0].iov_len < 7); |
3352 |
|
3353 |
ptr = pdu->elem.out_sg[0].iov_base;
|
3354 |
|
3355 |
memcpy(&pdu->size, ptr, 4);
|
3356 |
pdu->id = ptr[4];
|
3357 |
memcpy(&pdu->tag, ptr + 5, 2); |
3358 |
submit_pdu(s, pdu); |
3359 |
} |
3360 |
free_pdu(s, pdu); |
3361 |
} |