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-rw-r--r--hw/9pfs/cofs.c48
-rw-r--r--hw/9pfs/virtio-9p-handle.c9
-rw-r--r--hw/9pfs/virtio-9p-local.c287
-rw-r--r--hw/9pfs/virtio-9p-posix-acl.c52
-rw-r--r--hw/9pfs/virtio-9p-xattr-user.c27
-rw-r--r--hw/9pfs/virtio-9p-xattr.c9
-rw-r--r--hw/9pfs/virtio-9p-xattr.h27
-rw-r--r--hw/9pfs/virtio-9p.h6
8 files changed, 316 insertions, 149 deletions
diff --git a/hw/9pfs/cofs.c b/hw/9pfs/cofs.c
index 3891050748..42ee614e27 100644
--- a/hw/9pfs/cofs.c
+++ b/hw/9pfs/cofs.c
@@ -17,35 +17,55 @@
#include "block/coroutine.h"
#include "virtio-9p-coth.h"
+static ssize_t __readlink(V9fsState *s, V9fsPath *path, V9fsString *buf)
+{
+ ssize_t len, maxlen = PATH_MAX;
+
+ buf->data = g_malloc(PATH_MAX);
+ for(;;) {
+ len = s->ops->readlink(&s->ctx, path, buf->data, maxlen);
+ if (len < 0) {
+ g_free(buf->data);
+ buf->data = NULL;
+ buf->size = 0;
+ break;
+ } else if (len == maxlen) {
+ /*
+ * We dodn't have space to put the NULL or we have more
+ * to read. Increase the size and try again
+ */
+ maxlen *= 2;
+ g_free(buf->data);
+ buf->data = g_malloc(maxlen);
+ continue;
+ }
+ /*
+ * Null terminate the readlink output
+ */
+ buf->data[len] = '\0';
+ buf->size = len;
+ break;
+ }
+ return len;
+}
+
int v9fs_co_readlink(V9fsPDU *pdu, V9fsPath *path, V9fsString *buf)
{
int err;
- ssize_t len;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
- buf->data = g_malloc(PATH_MAX);
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
- len = s->ops->readlink(&s->ctx, path,
- buf->data, PATH_MAX - 1);
- if (len > -1) {
- buf->size = len;
- buf->data[len] = 0;
- err = 0;
- } else {
+ err = __readlink(s, path, buf);
+ if (err < 0) {
err = -errno;
}
});
v9fs_path_unlock(s);
- if (err) {
- g_free(buf->data);
- buf->data = NULL;
- buf->size = 0;
- }
return err;
}
diff --git a/hw/9pfs/virtio-9p-handle.c b/hw/9pfs/virtio-9p-handle.c
index 17002a3d28..4b79cefd13 100644
--- a/hw/9pfs/virtio-9p-handle.c
+++ b/hw/9pfs/virtio-9p-handle.c
@@ -498,7 +498,7 @@ static int handle_lremovexattr(FsContext *ctx, V9fsPath *fs_path,
static int handle_name_to_path(FsContext *ctx, V9fsPath *dir_path,
const char *name, V9fsPath *target)
{
- char buffer[PATH_MAX];
+ char *buffer;
struct file_handle *fh;
int dirfd, ret, mnt_id;
struct handle_data *data = (struct handle_data *)ctx->private;
@@ -513,7 +513,9 @@ static int handle_name_to_path(FsContext *ctx, V9fsPath *dir_path,
dirfd = open_by_handle(data->mountfd, dir_path->data, O_PATH);
} else {
/* relative to export root */
- dirfd = open(rpath(ctx, ".", buffer), O_DIRECTORY);
+ buffer = rpath(ctx, ".");
+ dirfd = open(buffer, O_DIRECTORY);
+ g_free(buffer);
}
if (dirfd < 0) {
return dirfd;
@@ -521,7 +523,7 @@ static int handle_name_to_path(FsContext *ctx, V9fsPath *dir_path,
fh = g_malloc(sizeof(struct file_handle) + data->handle_bytes);
fh->handle_bytes = data->handle_bytes;
/* add a "./" at the beginning of the path */
- snprintf(buffer, PATH_MAX, "./%s", name);
+ buffer = g_strdup_printf("./%s", name);
/* flag = 0 imply don't follow symlink */
ret = name_to_handle(dirfd, buffer, fh, &mnt_id, 0);
if (!ret) {
@@ -531,6 +533,7 @@ static int handle_name_to_path(FsContext *ctx, V9fsPath *dir_path,
g_free(fh);
}
close(dirfd);
+ g_free(buffer);
return ret;
}
diff --git a/hw/9pfs/virtio-9p-local.c b/hw/9pfs/virtio-9p-local.c
index dc615a4d0f..56b302c122 100644
--- a/hw/9pfs/virtio-9p-local.c
+++ b/hw/9pfs/virtio-9p-local.c
@@ -42,18 +42,18 @@
#define VIRTFS_META_DIR ".virtfs_metadata"
-static const char *local_mapped_attr_path(FsContext *ctx,
- const char *path, char *buffer)
+static char *local_mapped_attr_path(FsContext *ctx, const char *path)
{
char *dir_name;
char *tmp_path = g_strdup(path);
char *base_name = basename(tmp_path);
+ char *buffer;
/* NULL terminate the directory */
dir_name = tmp_path;
*(base_name - 1) = '\0';
- snprintf(buffer, PATH_MAX, "%s/%s/%s/%s",
+ buffer = g_strdup_printf("%s/%s/%s/%s",
ctx->fs_root, dir_name, VIRTFS_META_DIR, base_name);
g_free(tmp_path);
return buffer;
@@ -92,10 +92,11 @@ static void local_mapped_file_attr(FsContext *ctx, const char *path,
{
FILE *fp;
char buf[ATTR_MAX];
- char attr_path[PATH_MAX];
+ char *attr_path;
- local_mapped_attr_path(ctx, path, attr_path);
+ attr_path = local_mapped_attr_path(ctx, path);
fp = local_fopen(attr_path, "r");
+ g_free(attr_path);
if (!fp) {
return;
}
@@ -118,12 +119,13 @@ static void local_mapped_file_attr(FsContext *ctx, const char *path,
static int local_lstat(FsContext *fs_ctx, V9fsPath *fs_path, struct stat *stbuf)
{
int err;
- char buffer[PATH_MAX];
+ char *buffer;
char *path = fs_path->data;
- err = lstat(rpath(fs_ctx, path, buffer), stbuf);
+ buffer = rpath(fs_ctx, path);
+ err = lstat(buffer, stbuf);
if (err) {
- return err;
+ goto err_out;
}
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
/* Actual credentials are part of extended attrs */
@@ -131,41 +133,42 @@ static int local_lstat(FsContext *fs_ctx, V9fsPath *fs_path, struct stat *stbuf)
gid_t tmp_gid;
mode_t tmp_mode;
dev_t tmp_dev;
- if (getxattr(rpath(fs_ctx, path, buffer), "user.virtfs.uid", &tmp_uid,
- sizeof(uid_t)) > 0) {
+ if (getxattr(buffer, "user.virtfs.uid", &tmp_uid, sizeof(uid_t)) > 0) {
stbuf->st_uid = tmp_uid;
}
- if (getxattr(rpath(fs_ctx, path, buffer), "user.virtfs.gid", &tmp_gid,
- sizeof(gid_t)) > 0) {
+ if (getxattr(buffer, "user.virtfs.gid", &tmp_gid, sizeof(gid_t)) > 0) {
stbuf->st_gid = tmp_gid;
}
- if (getxattr(rpath(fs_ctx, path, buffer), "user.virtfs.mode",
+ if (getxattr(buffer, "user.virtfs.mode",
&tmp_mode, sizeof(mode_t)) > 0) {
stbuf->st_mode = tmp_mode;
}
- if (getxattr(rpath(fs_ctx, path, buffer), "user.virtfs.rdev", &tmp_dev,
- sizeof(dev_t)) > 0) {
+ if (getxattr(buffer, "user.virtfs.rdev", &tmp_dev, sizeof(dev_t)) > 0) {
stbuf->st_rdev = tmp_dev;
}
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
local_mapped_file_attr(fs_ctx, path, stbuf);
}
+
+err_out:
+ g_free(buffer);
return err;
}
static int local_create_mapped_attr_dir(FsContext *ctx, const char *path)
{
int err;
- char attr_dir[PATH_MAX];
+ char *attr_dir;
char *tmp_path = g_strdup(path);
- snprintf(attr_dir, PATH_MAX, "%s/%s/%s",
+ attr_dir = g_strdup_printf("%s/%s/%s",
ctx->fs_root, dirname(tmp_path), VIRTFS_META_DIR);
err = mkdir(attr_dir, 0700);
if (err < 0 && errno == EEXIST) {
err = 0;
}
+ g_free(attr_dir);
g_free(tmp_path);
return err;
}
@@ -176,10 +179,11 @@ static int local_set_mapped_file_attr(FsContext *ctx,
FILE *fp;
int ret = 0;
char buf[ATTR_MAX];
- char attr_path[PATH_MAX];
+ char *attr_path;
int uid = -1, gid = -1, mode = -1, rdev = -1;
- fp = local_fopen(local_mapped_attr_path(ctx, path, attr_path), "r");
+ attr_path = local_mapped_attr_path(ctx, path);
+ fp = local_fopen(attr_path, "r");
if (!fp) {
goto create_map_file;
}
@@ -241,6 +245,7 @@ update_map_file:
fclose(fp);
err_out:
+ g_free(attr_path);
return ret;
}
@@ -282,36 +287,43 @@ static int local_set_xattr(const char *path, FsCred *credp)
static int local_post_create_passthrough(FsContext *fs_ctx, const char *path,
FsCred *credp)
{
- char buffer[PATH_MAX];
+ char *buffer;
- if (lchown(rpath(fs_ctx, path, buffer), credp->fc_uid,
- credp->fc_gid) < 0) {
+ buffer = rpath(fs_ctx, path);
+ if (lchown(buffer, credp->fc_uid, credp->fc_gid) < 0) {
/*
* If we fail to change ownership and if we are
* using security model none. Ignore the error
*/
if ((fs_ctx->export_flags & V9FS_SEC_MASK) != V9FS_SM_NONE) {
- return -1;
+ goto err;
}
}
- if (chmod(rpath(fs_ctx, path, buffer), credp->fc_mode & 07777) < 0) {
- return -1;
+ if (chmod(buffer, credp->fc_mode & 07777) < 0) {
+ goto err;
}
+
+ g_free(buffer);
return 0;
+err:
+ g_free(buffer);
+ return -1;
}
static ssize_t local_readlink(FsContext *fs_ctx, V9fsPath *fs_path,
char *buf, size_t bufsz)
{
ssize_t tsize = -1;
- char buffer[PATH_MAX];
+ char *buffer;
char *path = fs_path->data;
if ((fs_ctx->export_flags & V9FS_SM_MAPPED) ||
(fs_ctx->export_flags & V9FS_SM_MAPPED_FILE)) {
int fd;
- fd = open(rpath(fs_ctx, path, buffer), O_RDONLY | O_NOFOLLOW);
+ buffer = rpath(fs_ctx, path);
+ fd = open(buffer, O_RDONLY | O_NOFOLLOW);
+ g_free(buffer);
if (fd == -1) {
return -1;
}
@@ -322,7 +334,9 @@ static ssize_t local_readlink(FsContext *fs_ctx, V9fsPath *fs_path,
return tsize;
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
- tsize = readlink(rpath(fs_ctx, path, buffer), buf, bufsz);
+ buffer = rpath(fs_ctx, path);
+ tsize = readlink(buffer, buf, bufsz);
+ g_free(buffer);
}
return tsize;
}
@@ -340,20 +354,24 @@ static int local_closedir(FsContext *ctx, V9fsFidOpenState *fs)
static int local_open(FsContext *ctx, V9fsPath *fs_path,
int flags, V9fsFidOpenState *fs)
{
- char buffer[PATH_MAX];
+ char *buffer;
char *path = fs_path->data;
- fs->fd = open(rpath(ctx, path, buffer), flags | O_NOFOLLOW);
+ buffer = rpath(ctx, path);
+ fs->fd = open(buffer, flags | O_NOFOLLOW);
+ g_free(buffer);
return fs->fd;
}
static int local_opendir(FsContext *ctx,
V9fsPath *fs_path, V9fsFidOpenState *fs)
{
- char buffer[PATH_MAX];
+ char *buffer;
char *path = fs_path->data;
- fs->dir = opendir(rpath(ctx, path, buffer));
+ buffer = rpath(ctx, path);
+ fs->dir = opendir(buffer);
+ g_free(buffer);
if (!fs->dir) {
return -1;
}
@@ -441,18 +459,23 @@ static ssize_t local_pwritev(FsContext *ctx, V9fsFidOpenState *fs,
static int local_chmod(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)
{
- char buffer[PATH_MAX];
+ char *buffer;
+ int ret = -1;
char *path = fs_path->data;
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
- return local_set_xattr(rpath(fs_ctx, path, buffer), credp);
+ buffer = rpath(fs_ctx, path);
+ ret = local_set_xattr(buffer, credp);
+ g_free(buffer);
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
return local_set_mapped_file_attr(fs_ctx, path, credp);
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
- return chmod(rpath(fs_ctx, path, buffer), credp->fc_mode);
+ buffer = rpath(fs_ctx, path);
+ ret = chmod(buffer, credp->fc_mode);
+ g_free(buffer);
}
- return -1;
+ return ret;
}
static int local_mknod(FsContext *fs_ctx, V9fsPath *dir_path,
@@ -462,7 +485,7 @@ static int local_mknod(FsContext *fs_ctx, V9fsPath *dir_path,
int err = -1;
int serrno = 0;
V9fsString fullname;
- char buffer[PATH_MAX];
+ char *buffer;
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
@@ -470,21 +493,23 @@ static int local_mknod(FsContext *fs_ctx, V9fsPath *dir_path,
/* Determine the security model */
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
- err = mknod(rpath(fs_ctx, path, buffer),
- SM_LOCAL_MODE_BITS|S_IFREG, 0);
+ buffer = rpath(fs_ctx, path);
+ err = mknod(buffer, SM_LOCAL_MODE_BITS|S_IFREG, 0);
if (err == -1) {
+ g_free(buffer);
goto out;
}
- err = local_set_xattr(rpath(fs_ctx, path, buffer), credp);
+ err = local_set_xattr(buffer, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
- err = mknod(rpath(fs_ctx, path, buffer),
- SM_LOCAL_MODE_BITS|S_IFREG, 0);
+ buffer = rpath(fs_ctx, path);
+ err = mknod(buffer, SM_LOCAL_MODE_BITS|S_IFREG, 0);
if (err == -1) {
+ g_free(buffer);
goto out;
}
err = local_set_mapped_file_attr(fs_ctx, path, credp);
@@ -494,9 +519,10 @@ static int local_mknod(FsContext *fs_ctx, V9fsPath *dir_path,
}
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
- err = mknod(rpath(fs_ctx, path, buffer), credp->fc_mode,
- credp->fc_rdev);
+ buffer = rpath(fs_ctx, path);
+ err = mknod(buffer, credp->fc_mode, credp->fc_rdev);
if (err == -1) {
+ g_free(buffer);
goto out;
}
err = local_post_create_passthrough(fs_ctx, path, credp);
@@ -508,8 +534,9 @@ static int local_mknod(FsContext *fs_ctx, V9fsPath *dir_path,
goto out;
err_end:
- remove(rpath(fs_ctx, path, buffer));
+ remove(buffer);
errno = serrno;
+ g_free(buffer);
out:
v9fs_string_free(&fullname);
return err;
@@ -522,7 +549,7 @@ static int local_mkdir(FsContext *fs_ctx, V9fsPath *dir_path,
int err = -1;
int serrno = 0;
V9fsString fullname;
- char buffer[PATH_MAX];
+ char *buffer;
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
@@ -530,19 +557,23 @@ static int local_mkdir(FsContext *fs_ctx, V9fsPath *dir_path,
/* Determine the security model */
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
- err = mkdir(rpath(fs_ctx, path, buffer), SM_LOCAL_DIR_MODE_BITS);
+ buffer = rpath(fs_ctx, path);
+ err = mkdir(buffer, SM_LOCAL_DIR_MODE_BITS);
if (err == -1) {
+ g_free(buffer);
goto out;
}
credp->fc_mode = credp->fc_mode|S_IFDIR;
- err = local_set_xattr(rpath(fs_ctx, path, buffer), credp);
+ err = local_set_xattr(buffer, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
- err = mkdir(rpath(fs_ctx, path, buffer), SM_LOCAL_DIR_MODE_BITS);
+ buffer = rpath(fs_ctx, path);
+ err = mkdir(buffer, SM_LOCAL_DIR_MODE_BITS);
if (err == -1) {
+ g_free(buffer);
goto out;
}
credp->fc_mode = credp->fc_mode|S_IFDIR;
@@ -553,8 +584,10 @@ static int local_mkdir(FsContext *fs_ctx, V9fsPath *dir_path,
}
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
- err = mkdir(rpath(fs_ctx, path, buffer), credp->fc_mode);
+ buffer = rpath(fs_ctx, path);
+ err = mkdir(buffer, credp->fc_mode);
if (err == -1) {
+ g_free(buffer);
goto out;
}
err = local_post_create_passthrough(fs_ctx, path, credp);
@@ -566,8 +599,9 @@ static int local_mkdir(FsContext *fs_ctx, V9fsPath *dir_path,
goto out;
err_end:
- remove(rpath(fs_ctx, path, buffer));
+ remove(buffer);
errno = serrno;
+ g_free(buffer);
out:
v9fs_string_free(&fullname);
return err;
@@ -626,7 +660,7 @@ static int local_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name,
int err = -1;
int serrno = 0;
V9fsString fullname;
- char buffer[PATH_MAX];
+ char *buffer;
/*
* Mark all the open to not follow symlinks
@@ -639,21 +673,25 @@ static int local_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name,
/* Determine the security model */
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
- fd = open(rpath(fs_ctx, path, buffer), flags, SM_LOCAL_MODE_BITS);
+ buffer = rpath(fs_ctx, path);
+ fd = open(buffer, flags, SM_LOCAL_MODE_BITS);
if (fd == -1) {
+ g_free(buffer);
err = fd;
goto out;
}
credp->fc_mode = credp->fc_mode|S_IFREG;
/* Set cleint credentials in xattr */
- err = local_set_xattr(rpath(fs_ctx, path, buffer), credp);
+ err = local_set_xattr(buffer, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
- fd = open(rpath(fs_ctx, path, buffer), flags, SM_LOCAL_MODE_BITS);
+ buffer = rpath(fs_ctx, path);
+ fd = open(buffer, flags, SM_LOCAL_MODE_BITS);
if (fd == -1) {
+ g_free(buffer);
err = fd;
goto out;
}
@@ -666,8 +704,10 @@ static int local_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name,
}
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
- fd = open(rpath(fs_ctx, path, buffer), flags, credp->fc_mode);
+ buffer = rpath(fs_ctx, path);
+ fd = open(buffer, flags, credp->fc_mode);
if (fd == -1) {
+ g_free(buffer);
err = fd;
goto out;
}
@@ -683,8 +723,9 @@ static int local_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name,
err_end:
close(fd);
- remove(rpath(fs_ctx, path, buffer));
+ remove(buffer);
errno = serrno;
+ g_free(buffer);
out:
v9fs_string_free(&fullname);
return err;
@@ -698,7 +739,7 @@ static int local_symlink(FsContext *fs_ctx, const char *oldpath,
int serrno = 0;
char *newpath;
V9fsString fullname;
- char buffer[PATH_MAX];
+ char *buffer;
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
@@ -708,10 +749,10 @@ static int local_symlink(FsContext *fs_ctx, const char *oldpath,
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
int fd;
ssize_t oldpath_size, write_size;
- fd = open(rpath(fs_ctx, newpath, buffer),
- O_CREAT|O_EXCL|O_RDWR|O_NOFOLLOW,
- SM_LOCAL_MODE_BITS);
+ buffer = rpath(fs_ctx, newpath);
+ fd = open(buffer, O_CREAT|O_EXCL|O_RDWR|O_NOFOLLOW, SM_LOCAL_MODE_BITS);
if (fd == -1) {
+ g_free(buffer);
err = fd;
goto out;
}
@@ -730,7 +771,7 @@ static int local_symlink(FsContext *fs_ctx, const char *oldpath,
close(fd);
/* Set cleint credentials in symlink's xattr */
credp->fc_mode = credp->fc_mode|S_IFLNK;
- err = local_set_xattr(rpath(fs_ctx, newpath, buffer), credp);
+ err = local_set_xattr(buffer, credp);
if (err == -1) {
serrno = errno;
goto err_end;
@@ -738,10 +779,10 @@ static int local_symlink(FsContext *fs_ctx, const char *oldpath,
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
int fd;
ssize_t oldpath_size, write_size;
- fd = open(rpath(fs_ctx, newpath, buffer),
- O_CREAT|O_EXCL|O_RDWR|O_NOFOLLOW,
- SM_LOCAL_MODE_BITS);
+ buffer = rpath(fs_ctx, newpath);
+ fd = open(buffer, O_CREAT|O_EXCL|O_RDWR|O_NOFOLLOW, SM_LOCAL_MODE_BITS);
if (fd == -1) {
+ g_free(buffer);
err = fd;
goto out;
}
@@ -767,12 +808,13 @@ static int local_symlink(FsContext *fs_ctx, const char *oldpath,
}
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
- err = symlink(oldpath, rpath(fs_ctx, newpath, buffer));
+ buffer = rpath(fs_ctx, newpath);
+ err = symlink(oldpath, buffer);
if (err) {
+ g_free(buffer);
goto out;
}
- err = lchown(rpath(fs_ctx, newpath, buffer), credp->fc_uid,
- credp->fc_gid);
+ err = lchown(buffer, credp->fc_uid, credp->fc_gid);
if (err == -1) {
/*
* If we fail to change ownership and if we are
@@ -788,8 +830,9 @@ static int local_symlink(FsContext *fs_ctx, const char *oldpath,
goto out;
err_end:
- remove(rpath(fs_ctx, newpath, buffer));
+ remove(buffer);
errno = serrno;
+ g_free(buffer);
out:
v9fs_string_free(&fullname);
return err;
@@ -800,13 +843,16 @@ static int local_link(FsContext *ctx, V9fsPath *oldpath,
{
int ret;
V9fsString newpath;
- char buffer[PATH_MAX], buffer1[PATH_MAX];
+ char *buffer, *buffer1;
v9fs_string_init(&newpath);
v9fs_string_sprintf(&newpath, "%s/%s", dirpath->data, name);
- ret = link(rpath(ctx, oldpath->data, buffer),
- rpath(ctx, newpath.data, buffer1));
+ buffer = rpath(ctx, oldpath->data);
+ buffer1 = rpath(ctx, newpath.data);
+ ret = link(buffer, buffer1);
+ g_free(buffer);
+ g_free(buffer1);
/* now link the virtfs_metadata files */
if (!ret && (ctx->export_flags & V9FS_SM_MAPPED_FILE)) {
@@ -815,8 +861,11 @@ static int local_link(FsContext *ctx, V9fsPath *oldpath,
if (ret < 0) {
goto err_out;
}
- ret = link(local_mapped_attr_path(ctx, oldpath->data, buffer),
- local_mapped_attr_path(ctx, newpath.data, buffer1));
+ buffer = local_mapped_attr_path(ctx, oldpath->data);
+ buffer1 = local_mapped_attr_path(ctx, newpath.data);
+ ret = link(buffer, buffer1);
+ g_free(buffer);
+ g_free(buffer1);
if (ret < 0 && errno != ENOENT) {
goto err_out;
}
@@ -828,17 +877,21 @@ err_out:
static int local_truncate(FsContext *ctx, V9fsPath *fs_path, off_t size)
{
- char buffer[PATH_MAX];
+ char *buffer;
+ int ret;
char *path = fs_path->data;
- return truncate(rpath(ctx, path, buffer), size);
+ buffer = rpath(ctx, path);
+ ret = truncate(buffer, size);
+ g_free(buffer);
+ return ret;
}
static int local_rename(FsContext *ctx, const char *oldpath,
const char *newpath)
{
int err;
- char buffer[PATH_MAX], buffer1[PATH_MAX];
+ char *buffer, *buffer1;
if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
err = local_create_mapped_attr_dir(ctx, newpath);
@@ -846,50 +899,69 @@ static int local_rename(FsContext *ctx, const char *oldpath,
return err;
}
/* rename the .virtfs_metadata files */
- err = rename(local_mapped_attr_path(ctx, oldpath, buffer),
- local_mapped_attr_path(ctx, newpath, buffer1));
+ buffer = local_mapped_attr_path(ctx, oldpath);
+ buffer1 = local_mapped_attr_path(ctx, newpath);
+ err = rename(buffer, buffer1);
+ g_free(buffer);
+ g_free(buffer1);
if (err < 0 && errno != ENOENT) {
return err;
}
}
- return rename(rpath(ctx, oldpath, buffer), rpath(ctx, newpath, buffer1));
+
+ buffer = rpath(ctx, oldpath);
+ buffer1 = rpath(ctx, newpath);
+ err = rename(buffer, buffer1);
+ g_free(buffer);
+ g_free(buffer1);
+ return err;
}
static int local_chown(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)
{
- char buffer[PATH_MAX];
+ char *buffer;
+ int ret = -1;
char *path = fs_path->data;
if ((credp->fc_uid == -1 && credp->fc_gid == -1) ||
(fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
- return lchown(rpath(fs_ctx, path, buffer),
- credp->fc_uid, credp->fc_gid);
+ buffer = rpath(fs_ctx, path);
+ ret = lchown(buffer, credp->fc_uid, credp->fc_gid);
+ g_free(buffer);
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
- return local_set_xattr(rpath(fs_ctx, path, buffer), credp);
+ buffer = rpath(fs_ctx, path);
+ ret = local_set_xattr(buffer, credp);
+ g_free(buffer);
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
return local_set_mapped_file_attr(fs_ctx, path, credp);
}
- return -1;
+ return ret;
}
static int local_utimensat(FsContext *s, V9fsPath *fs_path,
const struct timespec *buf)
{
- char buffer[PATH_MAX];
+ char *buffer;
+ int ret;
char *path = fs_path->data;
- return qemu_utimens(rpath(s, path, buffer), buf);
+ buffer = rpath(s, path);
+ ret = qemu_utimens(buffer, buf);
+ g_free(buffer);
+ return ret;
}
static int local_remove(FsContext *ctx, const char *path)
{
int err;
struct stat stbuf;
- char buffer[PATH_MAX];
+ char *buffer;
if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
- err = lstat(rpath(ctx, path, buffer), &stbuf);
+ buffer = rpath(ctx, path);
+ err = lstat(buffer, &stbuf);
+ g_free(buffer);
if (err) {
goto err_out;
}
@@ -898,9 +970,10 @@ static int local_remove(FsContext *ctx, const char *path)
* directory
*/
if (S_ISDIR(stbuf.st_mode)) {
- snprintf(buffer, ARRAY_SIZE(buffer), "%s/%s/%s",
- ctx->fs_root, path, VIRTFS_META_DIR);
+ buffer = g_strdup_printf("%s/%s/%s", ctx->fs_root,
+ path, VIRTFS_META_DIR);
err = remove(buffer);
+ g_free(buffer);
if (err < 0 && errno != ENOENT) {
/*
* We didn't had the .virtfs_metadata file. May be file created
@@ -913,7 +986,9 @@ static int local_remove(FsContext *ctx, const char *path)
* Now remove the name from parent directory
* .virtfs_metadata directory
*/
- err = remove(local_mapped_attr_path(ctx, path, buffer));
+ buffer = local_mapped_attr_path(ctx, path);
+ err = remove(buffer);
+ g_free(buffer);
if (err < 0 && errno != ENOENT) {
/*
* We didn't had the .virtfs_metadata file. May be file created
@@ -922,7 +997,10 @@ static int local_remove(FsContext *ctx, const char *path)
goto err_out;
}
}
- return remove(rpath(ctx, path, buffer));
+
+ buffer = rpath(ctx, path);
+ err = remove(buffer);
+ g_free(buffer);
err_out:
return err;
}
@@ -947,10 +1025,14 @@ static int local_fsync(FsContext *ctx, int fid_type,
static int local_statfs(FsContext *s, V9fsPath *fs_path, struct statfs *stbuf)
{
- char buffer[PATH_MAX];
+ char *buffer;
+ int ret;
char *path = fs_path->data;
- return statfs(rpath(s, path, buffer), stbuf);
+ buffer = rpath(s, path);
+ ret = statfs(buffer, stbuf);
+ g_free(buffer);
+ return ret;
}
static ssize_t local_lgetxattr(FsContext *ctx, V9fsPath *fs_path,
@@ -1023,7 +1105,7 @@ static int local_unlinkat(FsContext *ctx, V9fsPath *dir,
{
int ret;
V9fsString fullname;
- char buffer[PATH_MAX];
+ char *buffer;
v9fs_string_init(&fullname);
@@ -1034,9 +1116,10 @@ static int local_unlinkat(FsContext *ctx, V9fsPath *dir,
* If directory remove .virtfs_metadata contained in the
* directory
*/
- snprintf(buffer, ARRAY_SIZE(buffer), "%s/%s/%s", ctx->fs_root,
- fullname.data, VIRTFS_META_DIR);
+ buffer = g_strdup_printf("%s/%s/%s", ctx->fs_root,
+ fullname.data, VIRTFS_META_DIR);
ret = remove(buffer);
+ g_free(buffer);
if (ret < 0 && errno != ENOENT) {
/*
* We didn't had the .virtfs_metadata file. May be file created
@@ -1049,7 +1132,9 @@ static int local_unlinkat(FsContext *ctx, V9fsPath *dir,
* Now remove the name from parent directory
* .virtfs_metadata directory.
*/
- ret = remove(local_mapped_attr_path(ctx, fullname.data, buffer));
+ buffer = local_mapped_attr_path(ctx, fullname.data);
+ ret = remove(buffer);
+ g_free(buffer);
if (ret < 0 && errno != ENOENT) {
/*
* We didn't had the .virtfs_metadata file. May be file created
@@ -1059,7 +1144,9 @@ static int local_unlinkat(FsContext *ctx, V9fsPath *dir,
}
}
/* Remove the name finally */
- ret = remove(rpath(ctx, fullname.data, buffer));
+ buffer = rpath(ctx, fullname.data);
+ ret = remove(buffer);
+ g_free(buffer);
err_out:
v9fs_string_free(&fullname);
diff --git a/hw/9pfs/virtio-9p-posix-acl.c b/hw/9pfs/virtio-9p-posix-acl.c
index 339c5ecae4..803d9d94f3 100644
--- a/hw/9pfs/virtio-9p-posix-acl.c
+++ b/hw/9pfs/virtio-9p-posix-acl.c
@@ -26,8 +26,13 @@
static ssize_t mp_pacl_getxattr(FsContext *ctx, const char *path,
const char *name, void *value, size_t size)
{
- char buffer[PATH_MAX];
- return lgetxattr(rpath(ctx, path, buffer), MAP_ACL_ACCESS, value, size);
+ char *buffer;
+ ssize_t ret;
+
+ buffer = rpath(ctx, path);
+ ret = lgetxattr(buffer, MAP_ACL_ACCESS, value, size);
+ g_free(buffer);
+ return ret;
}
static ssize_t mp_pacl_listxattr(FsContext *ctx, const char *path,
@@ -52,17 +57,23 @@ static ssize_t mp_pacl_listxattr(FsContext *ctx, const char *path,
static int mp_pacl_setxattr(FsContext *ctx, const char *path, const char *name,
void *value, size_t size, int flags)
{
- char buffer[PATH_MAX];
- return lsetxattr(rpath(ctx, path, buffer), MAP_ACL_ACCESS, value,
- size, flags);
+ char *buffer;
+ int ret;
+
+ buffer = rpath(ctx, path);
+ ret = lsetxattr(buffer, MAP_ACL_ACCESS, value, size, flags);
+ g_free(buffer);
+ return ret;
}
static int mp_pacl_removexattr(FsContext *ctx,
const char *path, const char *name)
{
int ret;
- char buffer[PATH_MAX];
- ret = lremovexattr(rpath(ctx, path, buffer), MAP_ACL_ACCESS);
+ char *buffer;
+
+ buffer = rpath(ctx, path);
+ ret = lremovexattr(buffer, MAP_ACL_ACCESS);
if (ret == -1 && errno == ENODATA) {
/*
* We don't get ENODATA error when trying to remove a
@@ -72,14 +83,20 @@ static int mp_pacl_removexattr(FsContext *ctx,
errno = 0;
ret = 0;
}
+ g_free(buffer);
return ret;
}
static ssize_t mp_dacl_getxattr(FsContext *ctx, const char *path,
const char *name, void *value, size_t size)
{
- char buffer[PATH_MAX];
- return lgetxattr(rpath(ctx, path, buffer), MAP_ACL_DEFAULT, value, size);
+ char *buffer;
+ ssize_t ret;
+
+ buffer = rpath(ctx, path);
+ ret = lgetxattr(buffer, MAP_ACL_DEFAULT, value, size);
+ g_free(buffer);
+ return ret;
}
static ssize_t mp_dacl_listxattr(FsContext *ctx, const char *path,
@@ -104,17 +121,23 @@ static ssize_t mp_dacl_listxattr(FsContext *ctx, const char *path,
static int mp_dacl_setxattr(FsContext *ctx, const char *path, const char *name,
void *value, size_t size, int flags)
{
- char buffer[PATH_MAX];
- return lsetxattr(rpath(ctx, path, buffer), MAP_ACL_DEFAULT, value,
- size, flags);
+ char *buffer;
+ int ret;
+
+ buffer = rpath(ctx, path);
+ ret = lsetxattr(buffer, MAP_ACL_DEFAULT, value, size, flags);
+ g_free(buffer);
+ return ret;
}
static int mp_dacl_removexattr(FsContext *ctx,
const char *path, const char *name)
{
int ret;
- char buffer[PATH_MAX];
- ret = lremovexattr(rpath(ctx, path, buffer), MAP_ACL_DEFAULT);
+ char *buffer;
+
+ buffer = rpath(ctx, path);
+ ret = lremovexattr(buffer, MAP_ACL_DEFAULT);
if (ret == -1 && errno == ENODATA) {
/*
* We don't get ENODATA error when trying to remove a
@@ -124,6 +147,7 @@ static int mp_dacl_removexattr(FsContext *ctx,
errno = 0;
ret = 0;
}
+ g_free(buffer);
return ret;
}
diff --git a/hw/9pfs/virtio-9p-xattr-user.c b/hw/9pfs/virtio-9p-xattr-user.c
index e0c92ebf9e..46133e06db 100644
--- a/hw/9pfs/virtio-9p-xattr-user.c
+++ b/hw/9pfs/virtio-9p-xattr-user.c
@@ -21,7 +21,9 @@
static ssize_t mp_user_getxattr(FsContext *ctx, const char *path,
const char *name, void *value, size_t size)
{
- char buffer[PATH_MAX];
+ char *buffer;
+ ssize_t ret;
+
if (strncmp(name, "user.virtfs.", 12) == 0) {
/*
* Don't allow fetch of user.virtfs namesapce
@@ -30,7 +32,10 @@ static ssize_t mp_user_getxattr(FsContext *ctx, const char *path,
errno = ENOATTR;
return -1;
}
- return lgetxattr(rpath(ctx, path, buffer), name, value, size);
+ buffer = rpath(ctx, path);
+ ret = lgetxattr(buffer, name, value, size);
+ g_free(buffer);
+ return ret;
}
static ssize_t mp_user_listxattr(FsContext *ctx, const char *path,
@@ -69,7 +74,9 @@ static ssize_t mp_user_listxattr(FsContext *ctx, const char *path,
static int mp_user_setxattr(FsContext *ctx, const char *path, const char *name,
void *value, size_t size, int flags)
{
- char buffer[PATH_MAX];
+ char *buffer;
+ int ret;
+
if (strncmp(name, "user.virtfs.", 12) == 0) {
/*
* Don't allow fetch of user.virtfs namesapce
@@ -78,13 +85,18 @@ static int mp_user_setxattr(FsContext *ctx, const char *path, const char *name,
errno = EACCES;
return -1;
}
- return lsetxattr(rpath(ctx, path, buffer), name, value, size, flags);
+ buffer = rpath(ctx, path);
+ ret = lsetxattr(buffer, name, value, size, flags);
+ g_free(buffer);
+ return ret;
}
static int mp_user_removexattr(FsContext *ctx,
const char *path, const char *name)
{
- char buffer[PATH_MAX];
+ char *buffer;
+ int ret;
+
if (strncmp(name, "user.virtfs.", 12) == 0) {
/*
* Don't allow fetch of user.virtfs namesapce
@@ -93,7 +105,10 @@ static int mp_user_removexattr(FsContext *ctx,
errno = EACCES;
return -1;
}
- return lremovexattr(rpath(ctx, path, buffer), name);
+ buffer = rpath(ctx, path);
+ ret = lremovexattr(buffer, name);
+ g_free(buffer);
+ return ret;
}
XattrOperations mapped_user_xattr = {
diff --git a/hw/9pfs/virtio-9p-xattr.c b/hw/9pfs/virtio-9p-xattr.c
index 3fae557a84..07183887c5 100644
--- a/hw/9pfs/virtio-9p-xattr.c
+++ b/hw/9pfs/virtio-9p-xattr.c
@@ -67,21 +67,24 @@ ssize_t v9fs_list_xattr(FsContext *ctx, const char *path,
void *value, size_t vsize)
{
ssize_t size = 0;
- char buffer[PATH_MAX];
+ char *buffer;
void *ovalue = value;
XattrOperations *xops;
char *orig_value, *orig_value_start;
ssize_t xattr_len, parsed_len = 0, attr_len;
/* Get the actual len */
- xattr_len = llistxattr(rpath(ctx, path, buffer), value, 0);
+ buffer = rpath(ctx, path);
+ xattr_len = llistxattr(buffer, value, 0);
if (xattr_len <= 0) {
+ g_free(buffer);
return xattr_len;
}
/* Now fetch the xattr and find the actual size */
orig_value = g_malloc(xattr_len);
- xattr_len = llistxattr(rpath(ctx, path, buffer), orig_value, xattr_len);
+ xattr_len = llistxattr(buffer, orig_value, xattr_len);
+ g_free(buffer);
/* store the orig pointer */
orig_value_start = orig_value;
diff --git a/hw/9pfs/virtio-9p-xattr.h b/hw/9pfs/virtio-9p-xattr.h
index 41cc6cbc7b..327b32b5aa 100644
--- a/hw/9pfs/virtio-9p-xattr.h
+++ b/hw/9pfs/virtio-9p-xattr.h
@@ -54,23 +54,38 @@ ssize_t pt_listxattr(FsContext *ctx, const char *path, char *name, void *value,
static inline ssize_t pt_getxattr(FsContext *ctx, const char *path,
const char *name, void *value, size_t size)
{
- char buffer[PATH_MAX];
- return lgetxattr(rpath(ctx, path, buffer), name, value, size);
+ char *buffer;
+ ssize_t ret;
+
+ buffer = rpath(ctx, path);
+ ret = lgetxattr(buffer, name, value, size);
+ g_free(buffer);
+ return ret;
}
static inline int pt_setxattr(FsContext *ctx, const char *path,
const char *name, void *value,
size_t size, int flags)
{
- char buffer[PATH_MAX];
- return lsetxattr(rpath(ctx, path, buffer), name, value, size, flags);
+ char *buffer;
+ int ret;
+
+ buffer = rpath(ctx, path);
+ ret = lsetxattr(buffer, name, value, size, flags);
+ g_free(buffer);
+ return ret;
}
static inline int pt_removexattr(FsContext *ctx,
const char *path, const char *name)
{
- char buffer[PATH_MAX];
- return lremovexattr(rpath(ctx, path, buffer), name);
+ char *buffer;
+ int ret;
+
+ buffer = rpath(ctx, path);
+ ret = lremovexattr(path, name);
+ g_free(buffer);
+ return ret;
}
static inline ssize_t notsup_getxattr(FsContext *ctx, const char *path,
diff --git a/hw/9pfs/virtio-9p.h b/hw/9pfs/virtio-9p.h
index 1d6eedb7d8..2c3603aed0 100644
--- a/hw/9pfs/virtio-9p.h
+++ b/hw/9pfs/virtio-9p.h
@@ -6,6 +6,7 @@
#include <sys/time.h>
#include <utime.h>
#include <sys/resource.h>
+#include <glib.h>
#include "hw/virtio/virtio.h"
#include "fsdev/file-op-9p.h"
#include "fsdev/virtio-9p-marshal.h"
@@ -112,10 +113,9 @@ enum p9_proto_version {
#define FID_REFERENCED 0x1
#define FID_NON_RECLAIMABLE 0x2
-static inline const char *rpath(FsContext *ctx, const char *path, char *buffer)
+static inline char *rpath(FsContext *ctx, const char *path)
{
- snprintf(buffer, PATH_MAX, "%s/%s", ctx->fs_root, path);
- return buffer;
+ return g_strdup_printf("%s/%s", ctx->fs_root, path);
}
/*
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-15 04:40:44 +0000