#include "hw/virtio-pci.h"
#include "virtio-9p.h"
#include "fsdev/qemu-fsdev.h"
-#include "virtio-9p-debug.h"
#include "virtio-9p-xattr.h"
#include "virtio-9p-coth.h"
+#include "trace.h"
-int debug_9p_pdu;
+int open_fd_hw;
+int total_open_fd;
+static int open_fd_rc;
enum {
Oread = 0x00,
return ret;
}
-void cred_init(FsCred *credp)
+static int dotl_to_at_flags(int flags)
{
- credp->fc_uid = -1;
- credp->fc_gid = -1;
- credp->fc_mode = -1;
- credp->fc_rdev = -1;
+ int rflags = 0;
+ if (flags & P9_DOTL_AT_REMOVEDIR) {
+ rflags |= AT_REMOVEDIR;
+ }
+ return rflags;
}
-static int v9fs_do_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf)
-{
- return s->ops->lstat(&s->ctx, path->data, stbuf);
-}
+struct dotl_openflag_map {
+ int dotl_flag;
+ int open_flag;
+};
-static void v9fs_do_rewinddir(V9fsState *s, DIR *dir)
+static int dotl_to_open_flags(int flags)
{
- return s->ops->rewinddir(&s->ctx, dir);
-}
+ int i;
+ /*
+ * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY
+ * and P9_DOTL_NOACCESS
+ */
+ int oflags = flags & O_ACCMODE;
-static off_t v9fs_do_telldir(V9fsState *s, DIR *dir)
-{
- return s->ops->telldir(&s->ctx, dir);
+ struct dotl_openflag_map dotl_oflag_map[] = {
+ { P9_DOTL_CREATE, O_CREAT },
+ { P9_DOTL_EXCL, O_EXCL },
+ { P9_DOTL_NOCTTY , O_NOCTTY },
+ { P9_DOTL_TRUNC, O_TRUNC },
+ { P9_DOTL_APPEND, O_APPEND },
+ { P9_DOTL_NONBLOCK, O_NONBLOCK } ,
+ { P9_DOTL_DSYNC, O_DSYNC },
+ { P9_DOTL_FASYNC, FASYNC },
+ { P9_DOTL_DIRECT, O_DIRECT },
+ { P9_DOTL_LARGEFILE, O_LARGEFILE },
+ { P9_DOTL_DIRECTORY, O_DIRECTORY },
+ { P9_DOTL_NOFOLLOW, O_NOFOLLOW },
+ { P9_DOTL_NOATIME, O_NOATIME },
+ { P9_DOTL_SYNC, O_SYNC },
+ };
+
+ for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) {
+ if (flags & dotl_oflag_map[i].dotl_flag) {
+ oflags |= dotl_oflag_map[i].open_flag;
+ }
+ }
+
+ return oflags;
}
-static void v9fs_do_seekdir(V9fsState *s, DIR *dir, off_t off)
+void cred_init(FsCred *credp)
{
- return s->ops->seekdir(&s->ctx, dir, off);
+ credp->fc_uid = -1;
+ credp->fc_gid = -1;
+ credp->fc_mode = -1;
+ credp->fc_rdev = -1;
}
-static int v9fs_do_preadv(V9fsState *s, int fd, const struct iovec *iov,
- int iovcnt, int64_t offset)
+static int get_dotl_openflags(V9fsState *s, int oflags)
{
- return s->ops->preadv(&s->ctx, fd, iov, iovcnt, offset);
+ int flags;
+ /*
+ * Filter the client open flags
+ */
+ flags = dotl_to_open_flags(oflags);
+ flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT);
+ /*
+ * Ignore direct disk access hint until the server supports it.
+ */
+ flags &= ~O_DIRECT;
+ return flags;
}
-static void v9fs_string_init(V9fsString *str)
+void v9fs_string_init(V9fsString *str)
{
str->data = NULL;
str->size = 0;
}
-static void v9fs_string_free(V9fsString *str)
+void v9fs_string_free(V9fsString *str)
{
g_free(str->data);
str->data = NULL;
str->size = 0;
}
-static void v9fs_string_null(V9fsString *str)
+void v9fs_string_null(V9fsString *str)
{
v9fs_string_free(str);
}
return vsprintf(*strp, fmt, ap);
}
-static void GCC_FMT_ATTR(2, 3)
+void GCC_FMT_ATTR(2, 3)
v9fs_string_sprintf(V9fsString *str, const char *fmt, ...)
{
va_list ap;
str->size = err;
}
-static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs)
+void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs)
{
v9fs_string_free(lhs);
v9fs_string_sprintf(lhs, "%s", rhs->data);
}
+void v9fs_path_init(V9fsPath *path)
+{
+ path->data = NULL;
+ path->size = 0;
+}
+
+void v9fs_path_free(V9fsPath *path)
+{
+ g_free(path->data);
+ path->data = NULL;
+ path->size = 0;
+}
+
+void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs)
+{
+ v9fs_path_free(lhs);
+ lhs->data = g_malloc(rhs->size);
+ memcpy(lhs->data, rhs->data, rhs->size);
+ lhs->size = rhs->size;
+}
+
+int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath,
+ const char *name, V9fsPath *path)
+{
+ int err;
+ err = s->ops->name_to_path(&s->ctx, dirpath, name, path);
+ if (err < 0) {
+ err = -errno;
+ }
+ return err;
+}
+
/*
* Return TRUE if s1 is an ancestor of s2.
*
* E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d".
* As a special case, We treat s1 as ancestor of s2 if they are same!
*/
-static int v9fs_path_is_ancestor(V9fsString *s1, V9fsString *s2)
+static int v9fs_path_is_ancestor(V9fsPath *s1, V9fsPath *s2)
{
- if (!strncmp(s1->data, s2->data, s1->size)) {
- if (s2->data[s1->size] == '\0' || s2->data[s1->size] == '/') {
+ if (!strncmp(s1->data, s2->data, s1->size - 1)) {
+ if (s2->data[s1->size - 1] == '\0' || s2->data[s1->size - 1] == '/') {
return 1;
}
}
return str->size;
}
-static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid)
+/*
+ * returns 0 if fid got re-opened, 1 if not, < 0 on error */
+static int v9fs_reopen_fid(V9fsPDU *pdu, V9fsFidState *f)
+{
+ int err = 1;
+ if (f->fid_type == P9_FID_FILE) {
+ if (f->fs.fd == -1) {
+ do {
+ err = v9fs_co_open(pdu, f, f->open_flags);
+ } while (err == -EINTR && !pdu->cancelled);
+ }
+ } else if (f->fid_type == P9_FID_DIR) {
+ if (f->fs.dir == NULL) {
+ do {
+ err = v9fs_co_opendir(pdu, f);
+ } while (err == -EINTR && !pdu->cancelled);
+ }
+ }
+ return err;
+}
+
+static V9fsFidState *get_fid(V9fsPDU *pdu, int32_t fid)
{
+ int err;
V9fsFidState *f;
+ V9fsState *s = pdu->s;
for (f = s->fid_list; f; f = f->next) {
+ BUG_ON(f->clunked);
if (f->fid == fid) {
+ /*
+ * Update the fid ref upfront so that
+ * we don't get reclaimed when we yield
+ * in open later.
+ */
+ f->ref++;
+ /*
+ * check whether we need to reopen the
+ * file. We might have closed the fd
+ * while trying to free up some file
+ * descriptors.
+ */
+ err = v9fs_reopen_fid(pdu, f);
+ if (err < 0) {
+ f->ref--;
+ return NULL;
+ }
+ /*
+ * Mark the fid as referenced so that the LRU
+ * reclaim won't close the file descriptor
+ */
+ f->flags |= FID_REFERENCED;
return f;
}
}
-
return NULL;
}
{
V9fsFidState *f;
- f = lookup_fid(s, fid);
- if (f) {
- return NULL;
+ for (f = s->fid_list; f; f = f->next) {
+ /* If fid is already there return NULL */
+ BUG_ON(f->clunked);
+ if (f->fid == fid) {
+ return NULL;
+ }
}
-
f = g_malloc0(sizeof(V9fsFidState));
-
f->fid = fid;
f->fid_type = P9_FID_NONE;
-
+ f->ref = 1;
+ /*
+ * Mark the fid as referenced so that the LRU
+ * reclaim won't close the file descriptor
+ */
+ f->flags |= FID_REFERENCED;
f->next = s->fid_list;
s->fid_list = f;
return f;
}
-static int v9fs_xattr_fid_clunk(V9fsState *s, V9fsFidState *fidp)
+static int v9fs_xattr_fid_clunk(V9fsPDU *pdu, V9fsFidState *fidp)
{
int retval = 0;
goto free_out;
}
if (fidp->fs.xattr.len) {
- retval = v9fs_co_lsetxattr(s, &fidp->path, &fidp->fs.xattr.name,
+ retval = v9fs_co_lsetxattr(pdu, &fidp->path, &fidp->fs.xattr.name,
fidp->fs.xattr.value,
fidp->fs.xattr.len,
fidp->fs.xattr.flags);
} else {
- retval = v9fs_co_lremovexattr(s, &fidp->path, &fidp->fs.xattr.name);
+ retval = v9fs_co_lremovexattr(pdu, &fidp->path, &fidp->fs.xattr.name);
}
free_out:
v9fs_string_free(&fidp->fs.xattr.name);
return retval;
}
-static int free_fid(V9fsState *s, int32_t fid)
+static int free_fid(V9fsPDU *pdu, V9fsFidState *fidp)
{
int retval = 0;
+
+ if (fidp->fid_type == P9_FID_FILE) {
+ /* If we reclaimed the fd no need to close */
+ if (fidp->fs.fd != -1) {
+ retval = v9fs_co_close(pdu, &fidp->fs);
+ }
+ } else if (fidp->fid_type == P9_FID_DIR) {
+ if (fidp->fs.dir != NULL) {
+ retval = v9fs_co_closedir(pdu, &fidp->fs);
+ }
+ } else if (fidp->fid_type == P9_FID_XATTR) {
+ retval = v9fs_xattr_fid_clunk(pdu, fidp);
+ }
+ v9fs_path_free(&fidp->path);
+ g_free(fidp);
+ return retval;
+}
+
+static void put_fid(V9fsPDU *pdu, V9fsFidState *fidp)
+{
+ BUG_ON(!fidp->ref);
+ fidp->ref--;
+ /*
+ * Don't free the fid if it is in reclaim list
+ */
+ if (!fidp->ref && fidp->clunked) {
+ free_fid(pdu, fidp);
+ }
+}
+
+static V9fsFidState *clunk_fid(V9fsState *s, int32_t fid)
+{
V9fsFidState **fidpp, *fidp;
for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) {
break;
}
}
-
if (*fidpp == NULL) {
- return -ENOENT;
+ return NULL;
}
-
fidp = *fidpp;
*fidpp = fidp->next;
+ fidp->clunked = 1;
+ return fidp;
+}
- if (fidp->fid_type == P9_FID_FILE) {
- retval = v9fs_co_close(s, fidp);
- } else if (fidp->fid_type == P9_FID_DIR) {
- retval = v9fs_co_closedir(s, fidp);
- } else if (fidp->fid_type == P9_FID_XATTR) {
- retval = v9fs_xattr_fid_clunk(s, fidp);
+void v9fs_reclaim_fd(V9fsPDU *pdu)
+{
+ int reclaim_count = 0;
+ V9fsState *s = pdu->s;
+ V9fsFidState *f, *reclaim_list = NULL;
+
+ for (f = s->fid_list; f; f = f->next) {
+ /*
+ * Unlink fids cannot be reclaimed. Check
+ * for them and skip them. Also skip fids
+ * currently being operated on.
+ */
+ if (f->ref || f->flags & FID_NON_RECLAIMABLE) {
+ continue;
+ }
+ /*
+ * if it is a recently referenced fid
+ * we leave the fid untouched and clear the
+ * reference bit. We come back to it later
+ * in the next iteration. (a simple LRU without
+ * moving list elements around)
+ */
+ if (f->flags & FID_REFERENCED) {
+ f->flags &= ~FID_REFERENCED;
+ continue;
+ }
+ /*
+ * Add fids to reclaim list.
+ */
+ if (f->fid_type == P9_FID_FILE) {
+ if (f->fs.fd != -1) {
+ /*
+ * Up the reference count so that
+ * a clunk request won't free this fid
+ */
+ f->ref++;
+ f->rclm_lst = reclaim_list;
+ reclaim_list = f;
+ f->fs_reclaim.fd = f->fs.fd;
+ f->fs.fd = -1;
+ reclaim_count++;
+ }
+ } else if (f->fid_type == P9_FID_DIR) {
+ if (f->fs.dir != NULL) {
+ /*
+ * Up the reference count so that
+ * a clunk request won't free this fid
+ */
+ f->ref++;
+ f->rclm_lst = reclaim_list;
+ reclaim_list = f;
+ f->fs_reclaim.dir = f->fs.dir;
+ f->fs.dir = NULL;
+ reclaim_count++;
+ }
+ }
+ if (reclaim_count >= open_fd_rc) {
+ break;
+ }
}
- v9fs_string_free(&fidp->path);
- g_free(fidp);
- return retval;
+ /*
+ * Now close the fid in reclaim list. Free them if they
+ * are already clunked.
+ */
+ while (reclaim_list) {
+ f = reclaim_list;
+ reclaim_list = f->rclm_lst;
+ if (f->fid_type == P9_FID_FILE) {
+ v9fs_co_close(pdu, &f->fs_reclaim);
+ } else if (f->fid_type == P9_FID_DIR) {
+ v9fs_co_closedir(pdu, &f->fs_reclaim);
+ }
+ f->rclm_lst = NULL;
+ /*
+ * Now drop the fid reference, free it
+ * if clunked.
+ */
+ put_fid(pdu, f);
+ }
+}
+
+static int v9fs_mark_fids_unreclaim(V9fsPDU *pdu, V9fsPath *path)
+{
+ int err;
+ V9fsState *s = pdu->s;
+ V9fsFidState *fidp, head_fid;
+
+ head_fid.next = s->fid_list;
+ for (fidp = s->fid_list; fidp; fidp = fidp->next) {
+ if (fidp->path.size != path->size) {
+ continue;
+ }
+ if (!memcmp(fidp->path.data, path->data, path->size)) {
+ /* Mark the fid non reclaimable. */
+ fidp->flags |= FID_NON_RECLAIMABLE;
+
+ /* reopen the file/dir if already closed */
+ err = v9fs_reopen_fid(pdu, fidp);
+ if (err < 0) {
+ return -1;
+ }
+ /*
+ * Go back to head of fid list because
+ * the list could have got updated when
+ * switched to the worker thread
+ */
+ if (err == 0) {
+ fidp = &head_fid;
+ }
+ }
+ }
+ return 0;
}
#define P9_QID_TYPE_DIR 0x80
{
size_t size;
+ memset(&qidp->path, 0, sizeof(qidp->path));
size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path));
memcpy(&qidp->path, &stbuf->st_ino, size);
qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
}
}
-static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp)
+static int fid_to_qid(V9fsPDU *pdu, V9fsFidState *fidp, V9fsQID *qidp)
{
struct stat stbuf;
int err;
- err = v9fs_co_lstat(s, &fidp->path, &stbuf);
+ err = v9fs_co_lstat(pdu, &fidp->path, &stbuf);
if (err < 0) {
return err;
}
V9fsPDU *pdu = NULL;
if (!QLIST_EMPTY(&s->free_list)) {
- pdu = QLIST_FIRST(&s->free_list);
- QLIST_REMOVE(pdu, next);
+ pdu = QLIST_FIRST(&s->free_list);
+ QLIST_REMOVE(pdu, next);
+ QLIST_INSERT_HEAD(&s->active_list, pdu, next);
}
return pdu;
}
static void free_pdu(V9fsState *s, V9fsPDU *pdu)
{
if (pdu) {
- if (debug_9p_pdu) {
- pprint_pdu(pdu);
+ /*
+ * Cancelled pdu are added back to the freelist
+ * by flush request .
+ */
+ if (!pdu->cancelled) {
+ QLIST_REMOVE(pdu, next);
+ QLIST_INSERT_HEAD(&s->free_list, pdu, next);
}
- QLIST_INSERT_HEAD(&s->free_list, pdu, next);
}
}
if (s->proto_version == V9FS_PROTO_2000L) {
id = P9_RLERROR;
}
+ trace_v9fs_rerror(pdu->tag, pdu->id, err); /* Trace ERROR */
}
/* fill out the header */
/* FIXME: we should batch these completions */
virtio_notify(&s->vdev, s->vq);
+ /* Now wakeup anybody waiting in flush for this request */
+ qemu_co_queue_next(&pdu->complete);
+
free_pdu(s, pdu);
}
return mode;
}
-static int stat_to_v9stat(V9fsState *s, V9fsString *name,
+static int stat_to_v9stat(V9fsPDU *pdu, V9fsPath *name,
const struct stat *stbuf,
V9fsStat *v9stat)
{
v9fs_string_null(&v9stat->extension);
if (v9stat->mode & P9_STAT_MODE_SYMLINK) {
- err = v9fs_co_readlink(s, name, &v9stat->extension);
+ err = v9fs_co_readlink(pdu, name, &v9stat->extension);
if (err < 0) {
return err;
}
printf("}\n");
}
-static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len)
+/* Will call this only for path name based fid */
+static void v9fs_fix_path(V9fsPath *dst, V9fsPath *src, int len)
+{
+ V9fsPath str;
+ v9fs_path_init(&str);
+ v9fs_path_copy(&str, dst);
+ v9fs_string_sprintf((V9fsString *)dst, "%s%s", src->data, str.data+len);
+ v9fs_path_free(&str);
+ /* +1 to include terminating NULL */
+ dst->size++;
+}
+
+static inline bool is_ro_export(FsContext *ctx)
{
- V9fsString str;
- v9fs_string_init(&str);
- v9fs_string_copy(&str, dst);
- v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len);
- v9fs_string_free(&str);
+ return ctx->export_flags & V9FS_RDONLY;
}
static void v9fs_version(void *opaque)
size_t offset = 7;
pdu_unmarshal(pdu, offset, "ds", &s->msize, &version);
+ trace_v9fs_version(pdu->tag, pdu->id, s->msize, version.data);
if (!strcmp(version.data, "9P2000.u")) {
s->proto_version = V9FS_PROTO_2000U;
}
offset += pdu_marshal(pdu, offset, "ds", s->msize, &version);
+ trace_v9fs_version_return(pdu->tag, pdu->id, s->msize, version.data);
+
complete_pdu(s, pdu, offset);
v9fs_string_free(&version);
ssize_t err;
pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname);
+ trace_v9fs_attach(pdu->tag, pdu->id, fid, afid, uname.data, aname.data);
fidp = alloc_fid(s, fid);
if (fidp == NULL) {
err = -EINVAL;
- goto out;
+ goto out_nofid;
}
fidp->uid = n_uname;
- v9fs_string_sprintf(&fidp->path, "%s", "/");
- err = fid_to_qid(s, fidp, &qid);
+ err = v9fs_co_name_to_path(pdu, NULL, "/", &fidp->path);
+ if (err < 0) {
+ err = -EINVAL;
+ clunk_fid(s, fid);
+ goto out;
+ }
+ err = fid_to_qid(pdu, fidp, &qid);
if (err < 0) {
err = -EINVAL;
- free_fid(s, fid);
+ clunk_fid(s, fid);
goto out;
}
offset += pdu_marshal(pdu, offset, "Q", &qid);
err = offset;
+ trace_v9fs_attach_return(pdu->tag, pdu->id,
+ qid.type, qid.version, qid.path);
out:
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(s, pdu, err);
v9fs_string_free(&uname);
v9fs_string_free(&aname);
V9fsState *s = pdu->s;
pdu_unmarshal(pdu, offset, "d", &fid);
- fidp = lookup_fid(s, fid);
+ trace_v9fs_stat(pdu->tag, pdu->id, fid);
+
+ fidp = get_fid(pdu, fid);
if (fidp == NULL) {
err = -ENOENT;
- goto out;
+ goto out_nofid;
}
- err = v9fs_co_lstat(s, &fidp->path, &stbuf);
+ err = v9fs_co_lstat(pdu, &fidp->path, &stbuf);
if (err < 0) {
goto out;
}
- err = stat_to_v9stat(s, &fidp->path, &stbuf, &v9stat);
+ err = stat_to_v9stat(pdu, &fidp->path, &stbuf, &v9stat);
if (err < 0) {
goto out;
}
offset += pdu_marshal(pdu, offset, "wS", 0, &v9stat);
err = offset;
+ trace_v9fs_stat_return(pdu->tag, pdu->id, v9stat.mode,
+ v9stat.atime, v9stat.mtime, v9stat.length);
v9fs_stat_free(&v9stat);
out:
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(s, pdu, err);
}
V9fsState *s = pdu->s;
pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask);
+ trace_v9fs_getattr(pdu->tag, pdu->id, fid, request_mask);
- fidp = lookup_fid(s, fid);
+ fidp = get_fid(pdu, fid);
if (fidp == NULL) {
retval = -ENOENT;
- goto out;
+ goto out_nofid;
}
/*
* Currently we only support BASIC fields in stat, so there is no
* need to look at request_mask.
*/
- retval = v9fs_co_lstat(s, &fidp->path, &stbuf);
+ retval = v9fs_co_lstat(pdu, &fidp->path, &stbuf);
if (retval < 0) {
goto out;
}
stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl);
+
+ /* fill st_gen if requested and supported by underlying fs */
+ if (request_mask & P9_STATS_GEN) {
+ retval = v9fs_co_st_gen(pdu, &fidp->path, stbuf.st_mode, &v9stat_dotl);
+ if (retval < 0) {
+ goto out;
+ }
+ v9stat_dotl.st_result_mask |= P9_STATS_GEN;
+ }
retval = offset;
retval += pdu_marshal(pdu, offset, "A", &v9stat_dotl);
+ trace_v9fs_getattr_return(pdu->tag, pdu->id, v9stat_dotl.st_result_mask,
+ v9stat_dotl.st_mode, v9stat_dotl.st_uid,
+ v9stat_dotl.st_gid);
out:
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(s, pdu, retval);
}
pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr);
- fidp = lookup_fid(s, fid);
+ fidp = get_fid(pdu, fid);
if (fidp == NULL) {
err = -EINVAL;
- goto out;
+ goto out_nofid;
}
if (v9iattr.valid & ATTR_MODE) {
- err = v9fs_co_chmod(s, &fidp->path, v9iattr.mode);
+ err = v9fs_co_chmod(pdu, &fidp->path, v9iattr.mode);
if (err < 0) {
goto out;
}
} else {
times[1].tv_nsec = UTIME_OMIT;
}
- err = v9fs_co_utimensat(s, &fidp->path, times);
+ err = v9fs_co_utimensat(pdu, &fidp->path, times);
if (err < 0) {
goto out;
}
if (!(v9iattr.valid & ATTR_GID)) {
v9iattr.gid = -1;
}
- err = v9fs_co_chown(s, &fidp->path, v9iattr.uid,
+ err = v9fs_co_chown(pdu, &fidp->path, v9iattr.uid,
v9iattr.gid);
if (err < 0) {
goto out;
}
}
if (v9iattr.valid & (ATTR_SIZE)) {
- err = v9fs_co_truncate(s, &fidp->path, v9iattr.size);
+ err = v9fs_co_truncate(pdu, &fidp->path, v9iattr.size);
if (err < 0) {
goto out;
}
}
err = offset;
out:
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(s, pdu, err);
}
int name_idx;
V9fsQID *qids = NULL;
int i, err = 0;
- V9fsString path;
+ V9fsPath dpath, path;
uint16_t nwnames;
struct stat stbuf;
size_t offset = 7;
int32_t fid, newfid;
V9fsString *wnames = NULL;
V9fsFidState *fidp;
- V9fsFidState *newfidp;
+ V9fsFidState *newfidp = NULL;;
V9fsPDU *pdu = opaque;
V9fsState *s = pdu->s;
offset += pdu_unmarshal(pdu, offset, "ddw", &fid,
&newfid, &nwnames);
+ trace_v9fs_walk(pdu->tag, pdu->id, fid, newfid, nwnames);
+
if (nwnames && nwnames <= P9_MAXWELEM) {
wnames = g_malloc0(sizeof(wnames[0]) * nwnames);
qids = g_malloc0(sizeof(qids[0]) * nwnames);
for (i = 0; i < nwnames; i++) {
offset += pdu_unmarshal(pdu, offset, "s", &wnames[i]);
}
-
} else if (nwnames > P9_MAXWELEM) {
err = -EINVAL;
- goto out;
+ goto out_nofid;
}
- fidp = lookup_fid(s, fid);
+ fidp = get_fid(pdu, fid);
if (fidp == NULL) {
err = -ENOENT;
- goto out;
+ goto out_nofid;
+ }
+ v9fs_path_init(&dpath);
+ v9fs_path_init(&path);
+ /*
+ * Both dpath and path initially poin to fidp.
+ * Needed to handle request with nwnames == 0
+ */
+ v9fs_path_copy(&dpath, &fidp->path);
+ v9fs_path_copy(&path, &fidp->path);
+ for (name_idx = 0; name_idx < nwnames; name_idx++) {
+ err = v9fs_co_name_to_path(pdu, &dpath, wnames[name_idx].data, &path);
+ if (err < 0) {
+ goto out;
+ }
+ err = v9fs_co_lstat(pdu, &path, &stbuf);
+ if (err < 0) {
+ goto out;
+ }
+ stat_to_qid(&stbuf, &qids[name_idx]);
+ v9fs_path_copy(&dpath, &path);
}
if (fid == newfid) {
BUG_ON(fidp->fid_type != P9_FID_NONE);
- v9fs_string_init(&path);
- for (name_idx = 0; name_idx < nwnames; name_idx++) {
- v9fs_string_sprintf(&path, "%s/%s",
- fidp->path.data, wnames[name_idx].data);
- v9fs_string_copy(&fidp->path, &path);
-
- err = v9fs_co_lstat(s, &fidp->path, &stbuf);
- if (err < 0) {
- v9fs_string_free(&path);
- goto out;
- }
- stat_to_qid(&stbuf, &qids[name_idx]);
- }
- v9fs_string_free(&path);
+ v9fs_path_copy(&fidp->path, &path);
} else {
newfidp = alloc_fid(s, newfid);
if (newfidp == NULL) {
goto out;
}
newfidp->uid = fidp->uid;
- v9fs_string_init(&path);
- v9fs_string_copy(&newfidp->path, &fidp->path);
- for (name_idx = 0; name_idx < nwnames; name_idx++) {
- v9fs_string_sprintf(&path, "%s/%s", newfidp->path.data,
- wnames[name_idx].data);
- v9fs_string_copy(&newfidp->path, &path);
- err = v9fs_co_lstat(s, &newfidp->path, &stbuf);
- if (err < 0) {
- free_fid(s, newfidp->fid);
- v9fs_string_free(&path);
- goto out;
- }
- stat_to_qid(&stbuf, &qids[name_idx]);
- }
- v9fs_string_free(&path);
+ v9fs_path_copy(&newfidp->path, &path);
}
err = v9fs_walk_marshal(pdu, nwnames, qids);
+ trace_v9fs_walk_return(pdu->tag, pdu->id, nwnames, qids);
out:
+ put_fid(pdu, fidp);
+ if (newfidp) {
+ put_fid(pdu, newfidp);
+ }
+ v9fs_path_free(&dpath);
+ v9fs_path_free(&path);
+out_nofid:
complete_pdu(s, pdu, err);
if (nwnames && nwnames <= P9_MAXWELEM) {
for (name_idx = 0; name_idx < nwnames; name_idx++) {
g_free(wnames);
g_free(qids);
}
+ return;
}
-static int32_t get_iounit(V9fsState *s, V9fsString *name)
+static int32_t get_iounit(V9fsPDU *pdu, V9fsPath *path)
{
struct statfs stbuf;
int32_t iounit = 0;
+ V9fsState *s = pdu->s;
/*
* iounit should be multiples of f_bsize (host filesystem block size
* and as well as less than (client msize - P9_IOHDRSZ))
*/
- if (!v9fs_co_statfs(s, name, &stbuf)) {
+ if (!v9fs_co_statfs(pdu, path, &stbuf)) {
iounit = stbuf.f_bsize;
iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize;
}
static void v9fs_open(void *opaque)
{
int flags;
- int iounit;
int32_t fid;
int32_t mode;
V9fsQID qid;
+ int iounit = 0;
ssize_t err = 0;
size_t offset = 7;
struct stat stbuf;
} else {
pdu_unmarshal(pdu, offset, "db", &fid, &mode);
}
- fidp = lookup_fid(s, fid);
+ trace_v9fs_open(pdu->tag, pdu->id, fid, mode);
+
+ fidp = get_fid(pdu, fid);
if (fidp == NULL) {
err = -ENOENT;
- goto out;
+ goto out_nofid;
}
BUG_ON(fidp->fid_type != P9_FID_NONE);
- err = v9fs_co_lstat(s, &fidp->path, &stbuf);
+ err = v9fs_co_lstat(pdu, &fidp->path, &stbuf);
if (err < 0) {
goto out;
}
stat_to_qid(&stbuf, &qid);
if (S_ISDIR(stbuf.st_mode)) {
- err = v9fs_co_opendir(s, fidp);
+ err = v9fs_co_opendir(pdu, fidp);
if (err < 0) {
goto out;
}
err = offset;
} else {
if (s->proto_version == V9FS_PROTO_2000L) {
- flags = mode;
- flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT);
- /* Ignore direct disk access hint until the server supports it. */
- flags &= ~O_DIRECT;
+ flags = get_dotl_openflags(s, mode);
} else {
flags = omode_to_uflags(mode);
}
- err = v9fs_co_open(s, fidp, flags);
+ if (is_ro_export(&s->ctx)) {
+ if (mode & O_WRONLY || mode & O_RDWR ||
+ mode & O_APPEND || mode & O_TRUNC) {
+ err = -EROFS;
+ goto out;
+ }
+ flags |= O_NOATIME;
+ }
+ err = v9fs_co_open(pdu, fidp, flags);
if (err < 0) {
goto out;
}
fidp->fid_type = P9_FID_FILE;
- iounit = get_iounit(s, &fidp->path);
+ fidp->open_flags = flags;
+ if (flags & O_EXCL) {
+ /*
+ * We let the host file system do O_EXCL check
+ * We should not reclaim such fd
+ */
+ fidp->flags |= FID_NON_RECLAIMABLE;
+ }
+ iounit = get_iounit(pdu, &fidp->path);
offset += pdu_marshal(pdu, offset, "Qd", &qid, iounit);
err = offset;
}
+ trace_v9fs_open_return(pdu->tag, pdu->id,
+ qid.type, qid.version, qid.path, iounit);
out:
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(s, pdu, err);
}
gid_t gid;
ssize_t err = 0;
ssize_t offset = 7;
- V9fsString fullname;
V9fsString name;
V9fsFidState *fidp;
struct stat stbuf;
int32_t iounit;
V9fsPDU *pdu = opaque;
- v9fs_string_init(&fullname);
pdu_unmarshal(pdu, offset, "dsddd", &dfid, &name, &flags,
&mode, &gid);
+ trace_v9fs_lcreate(pdu->tag, pdu->id, dfid, flags, mode, gid);
- fidp = lookup_fid(pdu->s, dfid);
+ fidp = get_fid(pdu, dfid);
if (fidp == NULL) {
err = -ENOENT;
- goto out;
+ goto out_nofid;
}
- v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data);
-
- /* Ignore direct disk access hint until the server supports it. */
- flags &= ~O_DIRECT;
- err = v9fs_co_open2(pdu->s, fidp, fullname.data, gid, flags, mode);
+ flags = get_dotl_openflags(pdu->s, flags);
+ err = v9fs_co_open2(pdu, fidp, &name, gid,
+ flags | O_CREAT, mode, &stbuf);
if (err < 0) {
goto out;
}
fidp->fid_type = P9_FID_FILE;
- iounit = get_iounit(pdu->s, &fullname);
-
- err = v9fs_co_lstat(pdu->s, &fullname, &stbuf);
- if (err < 0) {
- fidp->fid_type = P9_FID_NONE;
- if (fidp->fs.fd > 0) {
- close(fidp->fs.fd);
- }
- goto out;
+ fidp->open_flags = flags;
+ if (flags & O_EXCL) {
+ /*
+ * We let the host file system do O_EXCL check
+ * We should not reclaim such fd
+ */
+ fidp->flags |= FID_NON_RECLAIMABLE;
}
- v9fs_string_copy(&fidp->path, &fullname);
+ iounit = get_iounit(pdu, &fidp->path);
stat_to_qid(&stbuf, &qid);
offset += pdu_marshal(pdu, offset, "Qd", &qid, iounit);
err = offset;
+ trace_v9fs_lcreate_return(pdu->tag, pdu->id,
+ qid.type, qid.version, qid.path, iounit);
out:
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(pdu->s, pdu, err);
v9fs_string_free(&name);
- v9fs_string_free(&fullname);
}
static void v9fs_fsync(void *opaque)
V9fsState *s = pdu->s;
pdu_unmarshal(pdu, offset, "dd", &fid, &datasync);
- fidp = lookup_fid(s, fid);
+ trace_v9fs_fsync(pdu->tag, pdu->id, fid, datasync);
+
+ fidp = get_fid(pdu, fid);
if (fidp == NULL) {
err = -ENOENT;
- goto out;
+ goto out_nofid;
}
- err = v9fs_co_fsync(s, fidp, datasync);
+ err = v9fs_co_fsync(pdu, fidp, datasync);
if (!err) {
err = offset;
}
-out:
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(s, pdu, err);
}
int err;
int32_t fid;
size_t offset = 7;
+ V9fsFidState *fidp;
V9fsPDU *pdu = opaque;
V9fsState *s = pdu->s;
pdu_unmarshal(pdu, offset, "d", &fid);
- err = free_fid(s, fid);
- if (err < 0) {
- goto out;
+ trace_v9fs_clunk(pdu->tag, pdu->id, fid);
+
+ fidp = clunk_fid(s, fid);
+ if (fidp == NULL) {
+ err = -ENOENT;
+ goto out_nofid;
}
+ /*
+ * Bump the ref so that put_fid will
+ * free the fid.
+ */
+ fidp->ref++;
err = offset;
-out:
+
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(s, pdu, err);
}
-static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t);
-
-static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err)
+static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu,
+ V9fsFidState *fidp, int64_t off, int32_t max_count)
{
- if (err) {
- goto out;
- }
- vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
- vs->offset += vs->count;
- err = vs->offset;
-out:
- complete_pdu(s, vs->pdu, err);
- v9fs_stat_free(&vs->v9stat);
- v9fs_string_free(&vs->name);
- g_free(vs);
- return;
-}
+ size_t offset = 7;
+ int read_count;
+ int64_t xattr_len;
-static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs,
- ssize_t err)
-{
- if (err) {
- err = -errno;
- goto out;
- }
- err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat);
- if (err) {
- goto out;
+ xattr_len = fidp->fs.xattr.len;
+ read_count = xattr_len - off;
+ if (read_count > max_count) {
+ read_count = max_count;
+ } else if (read_count < 0) {
+ /*
+ * read beyond XATTR value
+ */
+ read_count = 0;
}
-
- vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S",
- &vs->v9stat);
- if ((vs->len != (vs->v9stat.size + 2)) ||
- ((vs->count + vs->len) > vs->max_count)) {
- v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos);
- v9fs_read_post_seekdir(s, vs, err);
- return;
- }
- vs->count += vs->len;
- v9fs_stat_free(&vs->v9stat);
- v9fs_string_free(&vs->name);
- vs->dir_pos = vs->dent->d_off;
- v9fs_co_readdir(s, vs->fidp, &vs->dent);
- v9fs_read_post_readdir(s, vs, err);
- return;
-out:
- v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos);
- v9fs_read_post_seekdir(s, vs, err);
- return;
-
+ offset += pdu_marshal(pdu, offset, "d", read_count);
+ offset += pdu_pack(pdu, offset,
+ ((char *)fidp->fs.xattr.value) + off,
+ read_count);
+ return offset;
}
-static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err)
+static int v9fs_do_readdir_with_stat(V9fsPDU *pdu,
+ V9fsFidState *fidp, int32_t max_count)
{
- if (vs->dent) {
- memset(&vs->v9stat, 0, sizeof(vs->v9stat));
- v9fs_string_init(&vs->name);
- v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data,
- vs->dent->d_name);
- err = v9fs_do_lstat(s, &vs->name, &vs->stbuf);
- v9fs_read_post_dir_lstat(s, vs, err);
- return;
- }
+ V9fsPath path;
+ V9fsStat v9stat;
+ int len, err = 0;
+ int32_t count = 0;
+ struct stat stbuf;
+ off_t saved_dir_pos;
+ struct dirent *dent, *result;
- vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
- vs->offset += vs->count;
- err = vs->offset;
- complete_pdu(s, vs->pdu, err);
- g_free(vs);
- return;
-}
+ /* save the directory position */
+ saved_dir_pos = v9fs_co_telldir(pdu, fidp);
+ if (saved_dir_pos < 0) {
+ return saved_dir_pos;
+ }
-static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err)
-{
- v9fs_co_readdir(s, vs->fidp, &vs->dent);
- v9fs_read_post_readdir(s, vs, err);
- return;
-}
+ dent = g_malloc(sizeof(struct dirent));
-static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs,
- ssize_t err)
-{
- vs->dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir);
- v9fs_read_post_telldir(s, vs, err);
- return;
-}
-
-static void v9fs_read_post_preadv(V9fsState *s, V9fsReadState *vs, ssize_t err)
-{
- if (err < 0) {
- /* IO error return the error */
- err = -errno;
- goto out;
- }
- vs->total += vs->len;
- vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt);
- if (vs->total < vs->count && vs->len > 0) {
- do {
- if (0) {
- print_sg(vs->sg, vs->cnt);
- }
- vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt,
- vs->off);
- if (vs->len > 0) {
- vs->off += vs->len;
- }
- } while (vs->len == -1 && errno == EINTR);
- if (vs->len == -1) {
- err = -errno;
+ while (1) {
+ v9fs_path_init(&path);
+ err = v9fs_co_readdir_r(pdu, fidp, dent, &result);
+ if (err || !result) {
+ break;
+ }
+ err = v9fs_co_name_to_path(pdu, &fidp->path, dent->d_name, &path);
+ if (err < 0) {
+ goto out;
+ }
+ err = v9fs_co_lstat(pdu, &path, &stbuf);
+ if (err < 0) {
+ goto out;
+ }
+ err = stat_to_v9stat(pdu, &path, &stbuf, &v9stat);
+ if (err < 0) {
+ goto out;
+ }
+ /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */
+ len = pdu_marshal(pdu, 11 + count, "S", &v9stat);
+ if ((len != (v9stat.size + 2)) || ((count + len) > max_count)) {
+ /* Ran out of buffer. Set dir back to old position and return */
+ v9fs_co_seekdir(pdu, fidp, saved_dir_pos);
+ v9fs_stat_free(&v9stat);
+ v9fs_path_free(&path);
+ g_free(dent);
+ return count;
}
- v9fs_read_post_preadv(s, vs, err);
- return;
+ count += len;
+ v9fs_stat_free(&v9stat);
+ v9fs_path_free(&path);
+ saved_dir_pos = dent->d_off;
}
- vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
- vs->offset += vs->count;
- err = vs->offset;
-
out:
- complete_pdu(s, vs->pdu, err);
- g_free(vs);
-}
-
-static void v9fs_xattr_read(V9fsState *s, V9fsReadState *vs)
-{
- ssize_t err = 0;
- int read_count;
- int64_t xattr_len;
-
- xattr_len = vs->fidp->fs.xattr.len;
- read_count = xattr_len - vs->off;
- if (read_count > vs->count) {
- read_count = vs->count;
- } else if (read_count < 0) {
- /*
- * read beyond XATTR value
- */
- read_count = 0;
+ g_free(dent);
+ v9fs_path_free(&path);
+ if (err < 0) {
+ return err;
}
- vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", read_count);
- vs->offset += pdu_pack(vs->pdu, vs->offset,
- ((char *)vs->fidp->fs.xattr.value) + vs->off,
- read_count);
- err = vs->offset;
- complete_pdu(s, vs->pdu, err);
- g_free(vs);
+ return count;
}
static void v9fs_read(void *opaque)
{
- V9fsPDU *pdu = opaque;
- V9fsState *s = pdu->s;
int32_t fid;
- V9fsReadState *vs;
+ int64_t off;
ssize_t err = 0;
+ int32_t count = 0;
+ size_t offset = 7;
+ int32_t max_count;
+ V9fsFidState *fidp;
+ V9fsPDU *pdu = opaque;
+ V9fsState *s = pdu->s;
- vs = g_malloc(sizeof(*vs));
- vs->pdu = pdu;
- vs->offset = 7;
- vs->total = 0;
- vs->len = 0;
- vs->count = 0;
-
- pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count);
+ pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &max_count);
+ trace_v9fs_read(pdu->tag, pdu->id, fid, off, max_count);
- vs->fidp = lookup_fid(s, fid);
- if (vs->fidp == NULL) {
+ fidp = get_fid(pdu, fid);
+ if (fidp == NULL) {
err = -EINVAL;
- goto out;
+ goto out_nofid;
}
+ if (fidp->fid_type == P9_FID_DIR) {
- if (vs->fidp->fid_type == P9_FID_DIR) {
- vs->max_count = vs->count;
- vs->count = 0;
- if (vs->off == 0) {
- v9fs_do_rewinddir(s, vs->fidp->fs.dir);
- }
- v9fs_read_post_rewinddir(s, vs, err);
- return;
- } else if (vs->fidp->fid_type == P9_FID_FILE) {
- vs->sg = vs->iov;
- pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt);
- vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt);
- if (vs->total <= vs->count) {
- vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt,
- vs->off);
- if (vs->len > 0) {
- vs->off += vs->len;
- }
- err = vs->len;
- v9fs_read_post_preadv(s, vs, err);
+ if (off == 0) {
+ v9fs_co_rewinddir(pdu, fidp);
}
- return;
- } else if (vs->fidp->fid_type == P9_FID_XATTR) {
- v9fs_xattr_read(s, vs);
- return;
+ count = v9fs_do_readdir_with_stat(pdu, fidp, max_count);
+ if (count < 0) {
+ err = count;
+ goto out;
+ }
+ err = offset;
+ err += pdu_marshal(pdu, offset, "d", count);
+ err += count;
+ } else if (fidp->fid_type == P9_FID_FILE) {
+ int32_t cnt;
+ int32_t len;
+ struct iovec *sg;
+ struct iovec iov[128]; /* FIXME: bad, bad, bad */
+
+ sg = iov;
+ pdu_marshal(pdu, offset + 4, "v", sg, &cnt);
+ sg = cap_sg(sg, max_count, &cnt);
+ do {
+ if (0) {
+ print_sg(sg, cnt);
+ }
+ /* Loop in case of EINTR */
+ do {
+ len = v9fs_co_preadv(pdu, fidp, sg, cnt, off);
+ if (len >= 0) {
+ off += len;
+ count += len;
+ }
+ } while (len == -EINTR && !pdu->cancelled);
+ if (len < 0) {
+ /* IO error return the error */
+ err = len;
+ goto out;
+ }
+ sg = adjust_sg(sg, len, &cnt);
+ } while (count < max_count && len > 0);
+ err = offset;
+ err += pdu_marshal(pdu, offset, "d", count);
+ err += count;
+ } else if (fidp->fid_type == P9_FID_XATTR) {
+ err = v9fs_xattr_read(s, pdu, fidp, off, max_count);
} else {
err = -EINVAL;
}
+ trace_v9fs_read_return(pdu->tag, pdu->id, count, err);
out:
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(s, pdu, err);
- g_free(vs);
}
static size_t v9fs_readdir_data_size(V9fsString *name)
return 24 + v9fs_string_size(name);
}
-static int v9fs_do_readdir(V9fsState *s, V9fsPDU *pdu,
+static int v9fs_do_readdir(V9fsPDU *pdu,
V9fsFidState *fidp, int32_t max_count)
{
size_t size;
int len, err = 0;
int32_t count = 0;
off_t saved_dir_pos;
- struct dirent *dent;
+ struct dirent *dent, *result;
/* save the directory position */
- saved_dir_pos = v9fs_co_telldir(s, fidp);
+ saved_dir_pos = v9fs_co_telldir(pdu, fidp);
if (saved_dir_pos < 0) {
return saved_dir_pos;
}
+
+ dent = g_malloc(sizeof(struct dirent));
+
while (1) {
- err = v9fs_co_readdir(s, fidp, &dent);
- if (err || !dent) {
+ err = v9fs_co_readdir_r(pdu, fidp, dent, &result);
+ if (err || !result) {
break;
}
v9fs_string_init(&name);
v9fs_string_sprintf(&name, "%s", dent->d_name);
if ((count + v9fs_readdir_data_size(&name)) > max_count) {
/* Ran out of buffer. Set dir back to old position and return */
- v9fs_co_seekdir(s, fidp, saved_dir_pos);
+ v9fs_co_seekdir(pdu, fidp, saved_dir_pos);
v9fs_string_free(&name);
+ g_free(dent);
return count;
}
/*
v9fs_string_free(&name);
saved_dir_pos = dent->d_off;
}
+ g_free(dent);
if (err < 0) {
return err;
}
pdu_unmarshal(pdu, offset, "dqd", &fid, &initial_offset, &max_count);
- fidp = lookup_fid(s, fid);
- if (fidp == NULL || !fidp->fs.dir) {
+ trace_v9fs_readdir(pdu->tag, pdu->id, fid, initial_offset, max_count);
+
+ fidp = get_fid(pdu, fid);
+ if (fidp == NULL) {
+ retval = -EINVAL;
+ goto out_nofid;
+ }
+ if (!fidp->fs.dir) {
retval = -EINVAL;
goto out;
}
if (initial_offset == 0) {
- v9fs_co_rewinddir(s, fidp);
+ v9fs_co_rewinddir(pdu, fidp);
} else {
- v9fs_co_seekdir(s, fidp, initial_offset);
+ v9fs_co_seekdir(pdu, fidp, initial_offset);
}
- count = v9fs_do_readdir(s, pdu, fidp, max_count);
+ count = v9fs_do_readdir(pdu, fidp, max_count);
if (count < 0) {
retval = count;
goto out;
retval = offset;
retval += pdu_marshal(pdu, offset, "d", count);
retval += count;
+ trace_v9fs_readdir_return(pdu->tag, pdu->id, count, retval);
out:
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(s, pdu, retval);
}
V9fsState *s = pdu->s;
pdu_unmarshal(pdu, offset, "dqdv", &fid, &off, &count, sg, &cnt);
- fidp = lookup_fid(s, fid);
+ trace_v9fs_write(pdu->tag, pdu->id, fid, off, count, cnt);
+
+ fidp = get_fid(pdu, fid);
if (fidp == NULL) {
err = -EINVAL;
- goto out;
+ goto out_nofid;
}
if (fidp->fid_type == P9_FID_FILE) {
if (fidp->fs.fd == -1) {
}
/* Loop in case of EINTR */
do {
- len = v9fs_co_pwritev(s, fidp, sg, cnt, off);
+ len = v9fs_co_pwritev(pdu, fidp, sg, cnt, off);
if (len >= 0) {
off += len;
total += len;
}
- } while (len == -EINTR);
+ } while (len == -EINTR && !pdu->cancelled);
if (len < 0) {
/* IO error return the error */
err = len;
} while (total < count && len > 0);
offset += pdu_marshal(pdu, offset, "d", total);
err = offset;
+ trace_v9fs_write_return(pdu->tag, pdu->id, total, err);
out:
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(s, pdu, err);
}
V9fsQID qid;
int32_t perm;
int8_t mode;
+ V9fsPath path;
struct stat stbuf;
V9fsString name;
V9fsString extension;
- V9fsString fullname;
int iounit;
V9fsPDU *pdu = opaque;
- v9fs_string_init(&fullname);
+ v9fs_path_init(&path);
pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name,
&perm, &mode, &extension);
- fidp = lookup_fid(pdu->s, fid);
+ trace_v9fs_create(pdu->tag, pdu->id, fid, name.data, perm, mode);
+
+ fidp = get_fid(pdu, fid);
if (fidp == NULL) {
err = -EINVAL;
- goto out;
- }
-
- v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data);
- err = v9fs_co_lstat(pdu->s, &fullname, &stbuf);
- if (!err) {
- err = -EEXIST;
- goto out;
- } else if (err != -ENOENT) {
- goto out;
+ goto out_nofid;
}
if (perm & P9_STAT_MODE_DIR) {
- err = v9fs_co_mkdir(pdu->s, fullname.data, perm & 0777,
- fidp->uid, -1);
+ err = v9fs_co_mkdir(pdu, fidp, &name, perm & 0777,
+ fidp->uid, -1, &stbuf);
if (err < 0) {
goto out;
}
- err = v9fs_co_opendir(pdu->s, fidp);
+ err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path);
+ if (err < 0) {
+ goto out;
+ }
+ v9fs_path_copy(&fidp->path, &path);
+ err = v9fs_co_opendir(pdu, fidp);
if (err < 0) {
goto out;
}
fidp->fid_type = P9_FID_DIR;
} else if (perm & P9_STAT_MODE_SYMLINK) {
- err = v9fs_co_symlink(pdu->s, fidp, extension.data,
- fullname.data, -1);
+ err = v9fs_co_symlink(pdu, fidp, &name,
+ extension.data, -1 , &stbuf);
+ if (err < 0) {
+ goto out;
+ }
+ err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path);
if (err < 0) {
goto out;
}
+ v9fs_path_copy(&fidp->path, &path);
} else if (perm & P9_STAT_MODE_LINK) {
- int32_t nfid = atoi(extension.data);
- V9fsFidState *nfidp = lookup_fid(pdu->s, nfid);
- if (nfidp == NULL) {
+ int32_t ofid = atoi(extension.data);
+ V9fsFidState *ofidp = get_fid(pdu, ofid);
+ if (ofidp == NULL) {
err = -EINVAL;
goto out;
}
- err = v9fs_co_link(pdu->s, &nfidp->path, &fullname);
+ err = v9fs_co_link(pdu, ofidp, fidp, &name);
+ put_fid(pdu, ofidp);
+ if (err < 0) {
+ goto out;
+ }
+ err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path);
if (err < 0) {
+ fidp->fid_type = P9_FID_NONE;
+ goto out;
+ }
+ v9fs_path_copy(&fidp->path, &path);
+ err = v9fs_co_lstat(pdu, &fidp->path, &stbuf);
+ if (err < 0) {
+ fidp->fid_type = P9_FID_NONE;
goto out;
}
} else if (perm & P9_STAT_MODE_DEVICE) {
}
nmode |= perm & 0777;
- err = v9fs_co_mknod(pdu->s, &fullname, fidp->uid, -1,
- makedev(major, minor), nmode);
+ err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1,
+ makedev(major, minor), nmode, &stbuf);
if (err < 0) {
goto out;
}
+ err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path);
+ if (err < 0) {
+ goto out;
+ }
+ v9fs_path_copy(&fidp->path, &path);
} else if (perm & P9_STAT_MODE_NAMED_PIPE) {
- err = v9fs_co_mknod(pdu->s, &fullname, fidp->uid, -1,
- 0, S_IFIFO | (perm & 0777));
+ err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1,
+ 0, S_IFIFO | (perm & 0777), &stbuf);
+ if (err < 0) {
+ goto out;
+ }
+ err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path);
if (err < 0) {
goto out;
}
+ v9fs_path_copy(&fidp->path, &path);
} else if (perm & P9_STAT_MODE_SOCKET) {
- err = v9fs_co_mknod(pdu->s, &fullname, fidp->uid, -1,
- 0, S_IFSOCK | (perm & 0777));
+ err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1,
+ 0, S_IFSOCK | (perm & 0777), &stbuf);
+ if (err < 0) {
+ goto out;
+ }
+ err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path);
if (err < 0) {
goto out;
}
+ v9fs_path_copy(&fidp->path, &path);
} else {
- err = v9fs_co_open2(pdu->s, fidp, fullname.data, -1,
- omode_to_uflags(mode)|O_CREAT, perm);
+ err = v9fs_co_open2(pdu, fidp, &name, -1,
+ omode_to_uflags(mode)|O_CREAT, perm, &stbuf);
if (err < 0) {
goto out;
}
fidp->fid_type = P9_FID_FILE;
- }
- err = v9fs_co_lstat(pdu->s, &fullname, &stbuf);
- if (err < 0) {
- fidp->fid_type = P9_FID_NONE;
- if (fidp->fs.fd) {
- close(fidp->fs.fd);
+ fidp->open_flags = omode_to_uflags(mode);
+ if (fidp->open_flags & O_EXCL) {
+ /*
+ * We let the host file system do O_EXCL check
+ * We should not reclaim such fd
+ */
+ fidp->flags |= FID_NON_RECLAIMABLE;
}
- goto out;
}
- iounit = get_iounit(pdu->s, &fidp->path);
- v9fs_string_copy(&fidp->path, &fullname);
+ iounit = get_iounit(pdu, &fidp->path);
stat_to_qid(&stbuf, &qid);
offset += pdu_marshal(pdu, offset, "Qd", &qid, iounit);
err = offset;
+ trace_v9fs_create_return(pdu->tag, pdu->id,
+ qid.type, qid.version, qid.path, iounit);
out:
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(pdu->s, pdu, err);
v9fs_string_free(&name);
v9fs_string_free(&extension);
- v9fs_string_free(&fullname);
+ v9fs_path_free(&path);
}
static void v9fs_symlink(void *opaque)
V9fsPDU *pdu = opaque;
V9fsString name;
V9fsString symname;
- V9fsString fullname;
V9fsFidState *dfidp;
V9fsQID qid;
struct stat stbuf;
gid_t gid;
size_t offset = 7;
- v9fs_string_init(&fullname);
pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid);
+ trace_v9fs_symlink(pdu->tag, pdu->id, dfid, name.data, symname.data, gid);
- dfidp = lookup_fid(pdu->s, dfid);
+ dfidp = get_fid(pdu, dfid);
if (dfidp == NULL) {
err = -EINVAL;
- goto out;
+ goto out_nofid;
}
-
- v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data);
- err = v9fs_co_symlink(pdu->s, dfidp, symname.data, fullname.data, gid);
- if (err < 0) {
- goto out;
- }
- err = v9fs_co_lstat(pdu->s, &fullname, &stbuf);
+ err = v9fs_co_symlink(pdu, dfidp, &name, symname.data, gid, &stbuf);
if (err < 0) {
goto out;
}
stat_to_qid(&stbuf, &qid);
offset += pdu_marshal(pdu, offset, "Q", &qid);
err = offset;
+ trace_v9fs_symlink_return(pdu->tag, pdu->id,
+ qid.type, qid.version, qid.path);
out:
+ put_fid(pdu, dfidp);
+out_nofid:
complete_pdu(pdu->s, pdu, err);
v9fs_string_free(&name);
v9fs_string_free(&symname);
- v9fs_string_free(&fullname);
}
static void v9fs_flush(void *opaque)
{
+ int16_t tag;
+ size_t offset = 7;
+ V9fsPDU *cancel_pdu;
V9fsPDU *pdu = opaque;
V9fsState *s = pdu->s;
- /* A nop call with no return */
+
+ pdu_unmarshal(pdu, offset, "w", &tag);
+ trace_v9fs_flush(pdu->tag, pdu->id, tag);
+
+ QLIST_FOREACH(cancel_pdu, &s->active_list, next) {
+ if (cancel_pdu->tag == tag) {
+ break;
+ }
+ }
+ if (cancel_pdu) {
+ cancel_pdu->cancelled = 1;
+ /*
+ * Wait for pdu to complete.
+ */
+ qemu_co_queue_wait(&cancel_pdu->complete);
+ cancel_pdu->cancelled = 0;
+ free_pdu(pdu->s, cancel_pdu);
+ }
complete_pdu(s, pdu, 7);
return;
}
V9fsState *s = pdu->s;
int32_t dfid, oldfid;
V9fsFidState *dfidp, *oldfidp;
- V9fsString name, fullname;
+ V9fsString name;;
size_t offset = 7;
int err = 0;
- v9fs_string_init(&fullname);
-
pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name);
+ trace_v9fs_link(pdu->tag, pdu->id, dfid, oldfid, name.data);
- dfidp = lookup_fid(s, dfid);
+ dfidp = get_fid(pdu, dfid);
if (dfidp == NULL) {
err = -ENOENT;
- goto out;
+ goto out_nofid;
}
- oldfidp = lookup_fid(s, oldfid);
+ oldfidp = get_fid(pdu, oldfid);
if (oldfidp == NULL) {
err = -ENOENT;
goto out;
}
-
- v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data);
- err = v9fs_co_link(s, &oldfidp->path, &fullname);
+ err = v9fs_co_link(pdu, oldfidp, dfidp, &name);
if (!err) {
err = offset;
}
- v9fs_string_free(&fullname);
-
out:
+ put_fid(pdu, dfidp);
+out_nofid:
v9fs_string_free(&name);
complete_pdu(s, pdu, err);
}
+/* Only works with path name based fid */
static void v9fs_remove(void *opaque)
{
int32_t fid;
V9fsPDU *pdu = opaque;
pdu_unmarshal(pdu, offset, "d", &fid);
+ trace_v9fs_remove(pdu->tag, pdu->id, fid);
- fidp = lookup_fid(pdu->s, fid);
+ fidp = get_fid(pdu, fid);
if (fidp == NULL) {
err = -EINVAL;
- goto out;
+ goto out_nofid;
}
- err = v9fs_co_remove(pdu->s, &fidp->path);
+ /* if fs driver is not path based, return EOPNOTSUPP */
+ if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) {
+ err = -EOPNOTSUPP;
+ goto out_err;
+ }
+ /*
+ * IF the file is unlinked, we cannot reopen
+ * the file later. So don't reclaim fd
+ */
+ err = v9fs_mark_fids_unreclaim(pdu, &fidp->path);
+ if (err < 0) {
+ goto out_err;
+ }
+ err = v9fs_co_remove(pdu, &fidp->path);
if (!err) {
err = offset;
}
-
+out_err:
/* For TREMOVE we need to clunk the fid even on failed remove */
- free_fid(pdu->s, fidp->fid);
-out:
+ clunk_fid(pdu->s, fidp->fid);
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(pdu->s, pdu, err);
}
-static int v9fs_complete_rename(V9fsState *s, V9fsFidState *fidp,
+static void v9fs_unlinkat(void *opaque)
+{
+ int err = 0;
+ V9fsString name;
+ int32_t dfid, flags;
+ size_t offset = 7;
+ V9fsPath path;
+ V9fsFidState *dfidp;
+ V9fsPDU *pdu = opaque;
+
+ pdu_unmarshal(pdu, offset, "dsd", &dfid, &name, &flags);
+ flags = dotl_to_at_flags(flags);
+
+ dfidp = get_fid(pdu, dfid);
+ if (dfidp == NULL) {
+ err = -EINVAL;
+ goto out_nofid;
+ }
+ /*
+ * IF the file is unlinked, we cannot reopen
+ * the file later. So don't reclaim fd
+ */
+ v9fs_path_init(&path);
+ err = v9fs_co_name_to_path(pdu, &dfidp->path, name.data, &path);
+ if (err < 0) {
+ goto out_err;
+ }
+ err = v9fs_mark_fids_unreclaim(pdu, &path);
+ if (err < 0) {
+ goto out_err;
+ }
+ err = v9fs_co_unlinkat(pdu, &dfidp->path, &name, flags);
+ if (!err) {
+ err = offset;
+ }
+out_err:
+ put_fid(pdu, dfidp);
+ v9fs_path_free(&path);
+out_nofid:
+ complete_pdu(pdu->s, pdu, err);
+ v9fs_string_free(&name);
+}
+
+
+/* Only works with path name based fid */
+static int v9fs_complete_rename(V9fsPDU *pdu, V9fsFidState *fidp,
int32_t newdirfid, V9fsString *name)
{
char *end;
int err = 0;
+ V9fsPath new_path;
+ V9fsFidState *tfidp;
+ V9fsState *s = pdu->s;
+ V9fsFidState *dirfidp = NULL;
char *old_name, *new_name;
+ v9fs_path_init(&new_path);
if (newdirfid != -1) {
- V9fsFidState *dirfidp;
- dirfidp = lookup_fid(s, newdirfid);
+ dirfidp = get_fid(pdu, newdirfid);
if (dirfidp == NULL) {
err = -ENOENT;
- goto out;
+ goto out_nofid;
}
BUG_ON(dirfidp->fid_type != P9_FID_NONE);
-
- new_name = g_malloc0(dirfidp->path.size + name->size + 2);
-
- strcpy(new_name, dirfidp->path.data);
- strcat(new_name, "/");
- strcat(new_name + dirfidp->path.size, name->data);
+ v9fs_co_name_to_path(pdu, &dirfidp->path, name->data, &new_path);
} else {
old_name = fidp->path.data;
end = strrchr(old_name, '/');
end = old_name;
}
new_name = g_malloc0(end - old_name + name->size + 1);
-
strncat(new_name, old_name, end - old_name);
strncat(new_name + (end - old_name), name->data, name->size);
+ v9fs_co_name_to_path(pdu, NULL, new_name, &new_path);
+ g_free(new_name);
}
-
- v9fs_string_free(name);
- name->data = new_name;
- name->size = strlen(new_name);
-
- if (strcmp(new_name, fidp->path.data) != 0) {
- err = v9fs_co_rename(s, &fidp->path, name);
- if (err < 0) {
- goto out;
- }
- V9fsFidState *tfidp;
- /*
- * Fixup fid's pointing to the old name to
- * start pointing to the new name
- */
- for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) {
- if (fidp == tfidp) {
- /*
- * we replace name of this fid towards the end
- * so that our below strcmp will work
- */
- continue;
- }
- if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) {
- /* replace the name */
- v9fs_fix_path(&tfidp->path, name, strlen(fidp->path.data));
- }
+ err = v9fs_co_rename(pdu, &fidp->path, &new_path);
+ if (err < 0) {
+ goto out;
+ }
+ /*
+ * Fixup fid's pointing to the old name to
+ * start pointing to the new name
+ */
+ for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) {
+ if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) {
+ /* replace the name */
+ v9fs_fix_path(&tfidp->path, &new_path, strlen(fidp->path.data));
}
- v9fs_string_copy(&fidp->path, name);
}
out:
+ if (dirfidp) {
+ put_fid(pdu, dirfidp);
+ }
+ v9fs_path_free(&new_path);
+out_nofid:
return err;
}
+/* Only works with path name based fid */
static void v9fs_rename(void *opaque)
{
int32_t fid;
pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name);
- fidp = lookup_fid(s, fid);
+ fidp = get_fid(pdu, fid);
if (fidp == NULL) {
err = -ENOENT;
- goto out;
+ goto out_nofid;
}
BUG_ON(fidp->fid_type != P9_FID_NONE);
-
- err = v9fs_complete_rename(s, fidp, newdirfid, &name);
+ /* if fs driver is not path based, return EOPNOTSUPP */
+ if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+ v9fs_path_write_lock(s);
+ err = v9fs_complete_rename(pdu, fidp, newdirfid, &name);
+ v9fs_path_unlock(s);
if (!err) {
err = offset;
}
out:
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(s, pdu, err);
v9fs_string_free(&name);
}
+static void v9fs_fix_fid_paths(V9fsPDU *pdu, V9fsPath *olddir,
+ V9fsString *old_name, V9fsPath *newdir,
+ V9fsString *new_name)
+{
+ V9fsFidState *tfidp;
+ V9fsPath oldpath, newpath;
+ V9fsState *s = pdu->s;
+
+
+ v9fs_path_init(&oldpath);
+ v9fs_path_init(&newpath);
+ v9fs_co_name_to_path(pdu, olddir, old_name->data, &oldpath);
+ v9fs_co_name_to_path(pdu, newdir, new_name->data, &newpath);
+
+ /*
+ * Fixup fid's pointing to the old name to
+ * start pointing to the new name
+ */
+ for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) {
+ if (v9fs_path_is_ancestor(&oldpath, &tfidp->path)) {
+ /* replace the name */
+ v9fs_fix_path(&tfidp->path, &newpath, strlen(oldpath.data));
+ }
+ }
+ v9fs_path_free(&oldpath);
+ v9fs_path_free(&newpath);
+}
+
+static int v9fs_complete_renameat(V9fsPDU *pdu, int32_t olddirfid,
+ V9fsString *old_name, int32_t newdirfid,
+ V9fsString *new_name)
+{
+ int err = 0;
+ V9fsState *s = pdu->s;
+ V9fsFidState *newdirfidp = NULL, *olddirfidp = NULL;
+
+ olddirfidp = get_fid(pdu, olddirfid);
+ if (olddirfidp == NULL) {
+ err = -ENOENT;
+ goto out;
+ }
+ if (newdirfid != -1) {
+ newdirfidp = get_fid(pdu, newdirfid);
+ if (newdirfidp == NULL) {
+ err = -ENOENT;
+ goto out;
+ }
+ } else {
+ newdirfidp = get_fid(pdu, olddirfid);
+ }
+
+ err = v9fs_co_renameat(pdu, &olddirfidp->path, old_name,
+ &newdirfidp->path, new_name);
+ if (err < 0) {
+ goto out;
+ }
+ if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) {
+ /* Only for path based fid we need to do the below fixup */
+ v9fs_fix_fid_paths(pdu, &olddirfidp->path, old_name,
+ &newdirfidp->path, new_name);
+ }
+out:
+ if (olddirfidp) {
+ put_fid(pdu, olddirfidp);
+ }
+ if (newdirfidp) {
+ put_fid(pdu, newdirfidp);
+ }
+ return err;
+}
+
+static void v9fs_renameat(void *opaque)
+{
+ ssize_t err = 0;
+ size_t offset = 7;
+ V9fsPDU *pdu = opaque;
+ V9fsState *s = pdu->s;
+ int32_t olddirfid, newdirfid;
+ V9fsString old_name, new_name;
+
+ pdu_unmarshal(pdu, offset, "dsds", &olddirfid,
+ &old_name, &newdirfid, &new_name);
+
+ v9fs_path_write_lock(s);
+ err = v9fs_complete_renameat(pdu, olddirfid,
+ &old_name, newdirfid, &new_name);
+ v9fs_path_unlock(s);
+ if (!err) {
+ err = offset;
+ }
+ complete_pdu(s, pdu, err);
+ v9fs_string_free(&old_name);
+ v9fs_string_free(&new_name);
+}
+
static void v9fs_wstat(void *opaque)
{
int32_t fid;
V9fsState *s = pdu->s;
pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat);
- fidp = lookup_fid(s, fid);
+ trace_v9fs_wstat(pdu->tag, pdu->id, fid,
+ v9stat.mode, v9stat.atime, v9stat.mtime);
+
+ fidp = get_fid(pdu, fid);
if (fidp == NULL) {
err = -EINVAL;
- goto out;
+ goto out_nofid;
}
/* do we need to sync the file? */
if (donttouch_stat(&v9stat)) {
- err = v9fs_co_fsync(s, fidp, 0);
+ err = v9fs_co_fsync(pdu, fidp, 0);
goto out;
}
if (v9stat.mode != -1) {
uint32_t v9_mode;
- err = v9fs_co_lstat(s, &fidp->path, &stbuf);
+ err = v9fs_co_lstat(pdu, &fidp->path, &stbuf);
if (err < 0) {
goto out;
}
err = -EIO;
goto out;
}
- err = v9fs_co_chmod(s, &fidp->path,
+ err = v9fs_co_chmod(pdu, &fidp->path,
v9mode_to_mode(v9stat.mode,
&v9stat.extension));
if (err < 0) {
} else {
times[1].tv_nsec = UTIME_OMIT;
}
- err = v9fs_co_utimensat(s, &fidp->path, times);
+ err = v9fs_co_utimensat(pdu, &fidp->path, times);
if (err < 0) {
goto out;
}
}
if (v9stat.n_gid != -1 || v9stat.n_uid != -1) {
- err = v9fs_co_chown(s, &fidp->path, v9stat.n_uid, v9stat.n_gid);
+ err = v9fs_co_chown(pdu, &fidp->path, v9stat.n_uid, v9stat.n_gid);
if (err < 0) {
goto out;
}
}
if (v9stat.name.size != 0) {
- err = v9fs_complete_rename(s, fidp, -1, &v9stat.name);
+ err = v9fs_complete_rename(pdu, fidp, -1, &v9stat.name);
if (err < 0) {
goto out;
}
}
if (v9stat.length != -1) {
- err = v9fs_co_truncate(s, &fidp->path, v9stat.length);
+ err = v9fs_co_truncate(pdu, &fidp->path, v9stat.length);
if (err < 0) {
goto out;
}
}
err = offset;
out:
+ put_fid(pdu, fidp);
+out_nofid:
v9fs_stat_free(&v9stat);
complete_pdu(s, pdu, err);
}
V9fsState *s = pdu->s;
pdu_unmarshal(pdu, offset, "d", &fid);
- fidp = lookup_fid(s, fid);
+ fidp = get_fid(pdu, fid);
if (fidp == NULL) {
retval = -ENOENT;
- goto out;
+ goto out_nofid;
}
- retval = v9fs_co_statfs(s, &fidp->path, &stbuf);
+ retval = v9fs_co_statfs(pdu, &fidp->path, &stbuf);
if (retval < 0) {
goto out;
}
retval = offset;
retval += v9fs_fill_statfs(s, pdu, &stbuf);
out:
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(s, pdu, retval);
return;
}
size_t offset = 7;
V9fsString name;
struct stat stbuf;
- V9fsString fullname;
V9fsFidState *fidp;
V9fsPDU *pdu = opaque;
V9fsState *s = pdu->s;
- v9fs_string_init(&fullname);
pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode,
&major, &minor, &gid);
+ trace_v9fs_mknod(pdu->tag, pdu->id, fid, mode, major, minor);
- fidp = lookup_fid(s, fid);
+ fidp = get_fid(pdu, fid);
if (fidp == NULL) {
err = -ENOENT;
- goto out;
- }
- v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data);
- err = v9fs_co_mknod(s, &fullname, fidp->uid, gid,
- makedev(major, minor), mode);
- if (err < 0) {
- goto out;
+ goto out_nofid;
}
- err = v9fs_co_lstat(s, &fullname, &stbuf);
+ err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, gid,
+ makedev(major, minor), mode, &stbuf);
if (err < 0) {
goto out;
}
stat_to_qid(&stbuf, &qid);
err = offset;
err += pdu_marshal(pdu, offset, "Q", &qid);
+ trace_v9fs_mknod_return(pdu->tag, pdu->id,
+ qid.type, qid.version, qid.path);
out:
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(s, pdu, err);
- v9fs_string_free(&fullname);
v9fs_string_free(&name);
}
pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock->type,
&flock->flags, &flock->start, &flock->length,
&flock->proc_id, &flock->client_id);
+
+ trace_v9fs_lock(pdu->tag, pdu->id, fid,
+ flock->type, flock->start, flock->length);
+
status = P9_LOCK_ERROR;
/* We support only block flag now (that too ignored currently) */
if (flock->flags & ~P9_LOCK_FLAGS_BLOCK) {
err = -EINVAL;
- goto out;
+ goto out_nofid;
}
- fidp = lookup_fid(s, fid);
+ fidp = get_fid(pdu, fid);
if (fidp == NULL) {
err = -ENOENT;
- goto out;
+ goto out_nofid;
}
- err = v9fs_co_fstat(s, fidp->fs.fd, &stbuf);
+ err = v9fs_co_fstat(pdu, fidp, &stbuf);
if (err < 0) {
goto out;
}
status = P9_LOCK_SUCCESS;
out:
+ put_fid(pdu, fidp);
+out_nofid:
err = offset;
err += pdu_marshal(pdu, offset, "b", status);
+ trace_v9fs_lock_return(pdu->tag, pdu->id, status);
complete_pdu(s, pdu, err);
+ v9fs_string_free(&flock->client_id);
g_free(flock);
}
&glock->start, &glock->length, &glock->proc_id,
&glock->client_id);
- fidp = lookup_fid(s, fid);
+ trace_v9fs_getlock(pdu->tag, pdu->id, fid,
+ glock->type, glock->start, glock->length);
+
+ fidp = get_fid(pdu, fid);
if (fidp == NULL) {
err = -ENOENT;
- goto out;
+ goto out_nofid;
}
- err = v9fs_co_fstat(s, fidp->fs.fd, &stbuf);
+ err = v9fs_co_fstat(pdu, fidp, &stbuf);
if (err < 0) {
goto out;
}
- glock->type = F_UNLCK;
+ glock->type = P9_LOCK_TYPE_UNLCK;
offset += pdu_marshal(pdu, offset, "bqqds", glock->type,
glock->start, glock->length, glock->proc_id,
&glock->client_id);
err = offset;
+ trace_v9fs_getlock_return(pdu->tag, pdu->id, glock->type, glock->start,
+ glock->length, glock->proc_id);
out:
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(s, pdu, err);
+ v9fs_string_free(&glock->client_id);
g_free(glock);
}
size_t offset = 7;
int32_t fid;
struct stat stbuf;
- V9fsString name, fullname;
V9fsQID qid;
+ V9fsString name;
V9fsFidState *fidp;
gid_t gid;
int mode;
int err = 0;
- v9fs_string_init(&fullname);
pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid);
- fidp = lookup_fid(pdu->s, fid);
+ trace_v9fs_mkdir(pdu->tag, pdu->id, fid, name.data, mode, gid);
+
+ fidp = get_fid(pdu, fid);
if (fidp == NULL) {
err = -ENOENT;
- goto out;
+ goto out_nofid;
}
- v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data);
- err = v9fs_co_mkdir(pdu->s, fullname.data, mode, fidp->uid, gid);
- if (err < 0) {
- goto out;
- }
- err = v9fs_co_lstat(pdu->s, &fullname, &stbuf);
+ err = v9fs_co_mkdir(pdu, fidp, &name, mode, fidp->uid, gid, &stbuf);
if (err < 0) {
goto out;
}
stat_to_qid(&stbuf, &qid);
offset += pdu_marshal(pdu, offset, "Q", &qid);
err = offset;
+ trace_v9fs_mkdir_return(pdu->tag, pdu->id,
+ qid.type, qid.version, qid.path, err);
out:
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(pdu->s, pdu, err);
- v9fs_string_free(&fullname);
v9fs_string_free(&name);
}
size_t offset = 7;
int32_t fid, newfid;
V9fsFidState *file_fidp;
- V9fsFidState *xattr_fidp;
+ V9fsFidState *xattr_fidp = NULL;
V9fsPDU *pdu = opaque;
V9fsState *s = pdu->s;
pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name);
- file_fidp = lookup_fid(s, fid);
+ trace_v9fs_xattrwalk(pdu->tag, pdu->id, fid, newfid, name.data);
+
+ file_fidp = get_fid(pdu, fid);
if (file_fidp == NULL) {
err = -ENOENT;
- goto out;
+ goto out_nofid;
}
xattr_fidp = alloc_fid(s, newfid);
if (xattr_fidp == NULL) {
err = -EINVAL;
goto out;
}
- v9fs_string_copy(&xattr_fidp->path, &file_fidp->path);
+ v9fs_path_copy(&xattr_fidp->path, &file_fidp->path);
if (name.data[0] == 0) {
/*
* listxattr request. Get the size first
*/
- size = v9fs_co_llistxattr(s, &xattr_fidp->path, NULL, 0);
+ size = v9fs_co_llistxattr(pdu, &xattr_fidp->path, NULL, 0);
if (size < 0) {
err = size;
- free_fid(s, xattr_fidp->fid);
+ clunk_fid(s, xattr_fidp->fid);
goto out;
}
/*
xattr_fidp->fs.xattr.copied_len = -1;
if (size) {
xattr_fidp->fs.xattr.value = g_malloc(size);
- err = v9fs_co_llistxattr(s, &xattr_fidp->path,
+ err = v9fs_co_llistxattr(pdu, &xattr_fidp->path,
xattr_fidp->fs.xattr.value,
xattr_fidp->fs.xattr.len);
if (err < 0) {
- free_fid(s, xattr_fidp->fid);
+ clunk_fid(s, xattr_fidp->fid);
goto out;
}
}
* specific xattr fid. We check for xattr
* presence also collect the xattr size
*/
- size = v9fs_co_lgetxattr(s, &xattr_fidp->path,
+ size = v9fs_co_lgetxattr(pdu, &xattr_fidp->path,
&name, NULL, 0);
if (size < 0) {
err = size;
- free_fid(s, xattr_fidp->fid);
+ clunk_fid(s, xattr_fidp->fid);
goto out;
}
/*
xattr_fidp->fs.xattr.copied_len = -1;
if (size) {
xattr_fidp->fs.xattr.value = g_malloc(size);
- err = v9fs_co_lgetxattr(s, &xattr_fidp->path,
+ err = v9fs_co_lgetxattr(pdu, &xattr_fidp->path,
&name, xattr_fidp->fs.xattr.value,
xattr_fidp->fs.xattr.len);
if (err < 0) {
- free_fid(s, xattr_fidp->fid);
+ clunk_fid(s, xattr_fidp->fid);
goto out;
}
}
offset += pdu_marshal(pdu, offset, "q", size);
err = offset;
}
+ trace_v9fs_xattrwalk_return(pdu->tag, pdu->id, size);
out:
+ put_fid(pdu, file_fidp);
+ if (xattr_fidp) {
+ put_fid(pdu, xattr_fidp);
+ }
+out_nofid:
complete_pdu(s, pdu, err);
v9fs_string_free(&name);
}
pdu_unmarshal(pdu, offset, "dsqd",
&fid, &name, &size, &flags);
+ trace_v9fs_xattrcreate(pdu->tag, pdu->id, fid, name.data, size, flags);
- file_fidp = lookup_fid(s, fid);
+ file_fidp = get_fid(pdu, fid);
if (file_fidp == NULL) {
err = -EINVAL;
- goto out;
+ goto out_nofid;
}
/* Make the file fid point to xattr */
xattr_fidp = file_fidp;
xattr_fidp->fs.xattr.value = NULL;
}
err = offset;
-out:
+ put_fid(pdu, file_fidp);
+out_nofid:
complete_pdu(s, pdu, err);
v9fs_string_free(&name);
}
V9fsFidState *fidp;
pdu_unmarshal(pdu, offset, "d", &fid);
- fidp = lookup_fid(pdu->s, fid);
+ trace_v9fs_readlink(pdu->tag, pdu->id, fid);
+ fidp = get_fid(pdu, fid);
if (fidp == NULL) {
err = -ENOENT;
- goto out;
+ goto out_nofid;
}
v9fs_string_init(&target);
- err = v9fs_co_readlink(pdu->s, &fidp->path, &target);
+ err = v9fs_co_readlink(pdu, &fidp->path, &target);
if (err < 0) {
goto out;
}
offset += pdu_marshal(pdu, offset, "s", &target);
err = offset;
+ trace_v9fs_readlink_return(pdu->tag, pdu->id, target.data);
v9fs_string_free(&target);
out:
+ put_fid(pdu, fidp);
+out_nofid:
complete_pdu(pdu->s, pdu, err);
}
[P9_TRENAME] = v9fs_rename,
[P9_TLOCK] = v9fs_lock,
[P9_TGETLOCK] = v9fs_getlock,
+ [P9_TRENAMEAT] = v9fs_renameat,
[P9_TREADLINK] = v9fs_readlink,
+ [P9_TUNLINKAT] = v9fs_unlinkat,
[P9_TMKDIR] = v9fs_mkdir,
[P9_TVERSION] = v9fs_version,
[P9_TLOPEN] = v9fs_open,
complete_pdu(pdu->s, pdu, -EOPNOTSUPP);
}
+static void v9fs_fs_ro(void *opaque)
+{
+ V9fsPDU *pdu = opaque;
+ complete_pdu(pdu->s, pdu, -EROFS);
+}
+
+static inline bool is_read_only_op(V9fsPDU *pdu)
+{
+ switch (pdu->id) {
+ case P9_TREADDIR:
+ case P9_TSTATFS:
+ case P9_TGETATTR:
+ case P9_TXATTRWALK:
+ case P9_TLOCK:
+ case P9_TGETLOCK:
+ case P9_TREADLINK:
+ case P9_TVERSION:
+ case P9_TLOPEN:
+ case P9_TATTACH:
+ case P9_TSTAT:
+ case P9_TWALK:
+ case P9_TCLUNK:
+ case P9_TFSYNC:
+ case P9_TOPEN:
+ case P9_TREAD:
+ case P9_TAUTH:
+ case P9_TFLUSH:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
static void submit_pdu(V9fsState *s, V9fsPDU *pdu)
{
Coroutine *co;
CoroutineEntry *handler;
- if (debug_9p_pdu) {
- pprint_pdu(pdu);
- }
if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) ||
(pdu_co_handlers[pdu->id] == NULL)) {
handler = v9fs_op_not_supp;
} else {
handler = pdu_co_handlers[pdu->id];
}
+
+ if (is_ro_export(&s->ctx) && !is_read_only_op(pdu)) {
+ handler = v9fs_fs_ro;
+ }
co = qemu_coroutine_create(handler);
qemu_coroutine_enter(co, pdu);
}
memcpy(&pdu->size, ptr, 4);
pdu->id = ptr[4];
memcpy(&pdu->tag, ptr + 5, 2);
+ qemu_co_queue_init(&pdu->complete);
submit_pdu(s, pdu);
}
free_pdu(s, pdu);
}
+
+void virtio_9p_set_fd_limit(void)
+{
+ struct rlimit rlim;
+ if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) {
+ fprintf(stderr, "Failed to get the resource limit\n");
+ exit(1);
+ }
+ open_fd_hw = rlim.rlim_cur - MIN(400, rlim.rlim_cur/3);
+ open_fd_rc = rlim.rlim_cur/2;
+}
projects / qemu.git / blobdiff