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hw/9pfs: Replace the direct call to xxxat() APIs with a wrapper 

xxxat() APIs are only available on POSIX platforms. For future
extension to Windows, let's replace the direct call to xxxat()
APIs with a wrapper.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
Message-Id: <20221219102022.2167736-4-bin.meng@windriver.com>
Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
This commit is contained in:
Bin Meng 2022-12-19 18:20:07 +08:00 committed by Christian Schoenebeck
parent 09f0080ecd
commit 6ca60cd7a3
2 changed files with 27 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
hw/9pfs/9p-local.c
View File

@ -103,14 +103,14 @@ static void renameat_preserve_errno(int odirfd, const char *opath, int ndirfd,
const char *npath) const char *npath)
{ {
int serrno = errno; int serrno = errno;
renameat(odirfd, opath, ndirfd, npath); qemu_renameat(odirfd, opath, ndirfd, npath);
errno = serrno; errno = serrno;
} }
static void unlinkat_preserve_errno(int dirfd, const char *path, int flags) static void unlinkat_preserve_errno(int dirfd, const char *path, int flags)
{ {
int serrno = errno; int serrno = errno;
unlinkat(dirfd, path, flags); qemu_unlinkat(dirfd, path, flags);
errno = serrno; errno = serrno;
} }
@ -194,7 +194,7 @@ static int local_lstat(FsContext *fs_ctx, V9fsPath *fs_path, struct stat *stbuf)
goto out; goto out;
} }
err = fstatat(dirfd, name, stbuf, AT_SYMLINK_NOFOLLOW); err = qemu_fstatat(dirfd, name, stbuf, AT_SYMLINK_NOFOLLOW);
if (err) { if (err) {
goto err_out; goto err_out;
} }
@ -253,7 +253,7 @@ static int local_set_mapped_file_attrat(int dirfd, const char *name,
} }
} }
} else { } else {
ret = mkdirat(dirfd, VIRTFS_META_DIR, 0700); ret = qemu_mkdirat(dirfd, VIRTFS_META_DIR, 0700);
if (ret < 0 && errno != EEXIST) { if (ret < 0 && errno != EEXIST) {
return -1; return -1;
} }
@ -349,7 +349,7 @@ static int fchmodat_nofollow(int dirfd, const char *name, mode_t mode)
*/ */
/* First, we clear non-racing symlinks out of the way. */ /* First, we clear non-racing symlinks out of the way. */
if (fstatat(dirfd, name, &stbuf, AT_SYMLINK_NOFOLLOW)) { if (qemu_fstatat(dirfd, name, &stbuf, AT_SYMLINK_NOFOLLOW)) {
return -1; return -1;
} }
if (S_ISLNK(stbuf.st_mode)) { if (S_ISLNK(stbuf.st_mode)) {
@ -734,7 +734,7 @@ static int local_mkdir(FsContext *fs_ctx, V9fsPath *dir_path,
if (fs_ctx->export_flags & V9FS_SM_MAPPED || if (fs_ctx->export_flags & V9FS_SM_MAPPED ||
fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
err = mkdirat(dirfd, name, fs_ctx->dmode); err = qemu_mkdirat(dirfd, name, fs_ctx->dmode);
if (err == -1) { if (err == -1) {
goto out; goto out;
} }
@ -750,7 +750,7 @@ static int local_mkdir(FsContext *fs_ctx, V9fsPath *dir_path,
} }
} else if (fs_ctx->export_flags & V9FS_SM_PASSTHROUGH || } else if (fs_ctx->export_flags & V9FS_SM_PASSTHROUGH ||
fs_ctx->export_flags & V9FS_SM_NONE) { fs_ctx->export_flags & V9FS_SM_NONE) {
err = mkdirat(dirfd, name, credp->fc_mode); err = qemu_mkdirat(dirfd, name, credp->fc_mode);
if (err == -1) { if (err == -1) {
goto out; goto out;
} }
@ -990,7 +990,7 @@ static int local_link(FsContext *ctx, V9fsPath *oldpath,
if (ctx->export_flags & V9FS_SM_MAPPED_FILE) { if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
int omap_dirfd, nmap_dirfd; int omap_dirfd, nmap_dirfd;
ret = mkdirat(ndirfd, VIRTFS_META_DIR, 0700); ret = qemu_mkdirat(ndirfd, VIRTFS_META_DIR, 0700);
if (ret < 0 && errno != EEXIST) { if (ret < 0 && errno != EEXIST) {
goto err_undo_link; goto err_undo_link;
} }
@ -1085,7 +1085,7 @@ static int local_utimensat(FsContext *s, V9fsPath *fs_path,
goto out; goto out;
} }
ret = utimensat(dirfd, name, buf, AT_SYMLINK_NOFOLLOW); ret = qemu_utimensat(dirfd, name, buf, AT_SYMLINK_NOFOLLOW);
close_preserve_errno(dirfd); close_preserve_errno(dirfd);
out: out:
g_free(dirpath); g_free(dirpath);
@ -1116,7 +1116,7 @@ static int local_unlinkat_common(FsContext *ctx, int dirfd, const char *name,
if (fd == -1) { if (fd == -1) {
return -1; return -1;
} }
ret = unlinkat(fd, VIRTFS_META_DIR, AT_REMOVEDIR); ret = qemu_unlinkat(fd, VIRTFS_META_DIR, AT_REMOVEDIR);
close_preserve_errno(fd); close_preserve_errno(fd);
if (ret < 0 && errno != ENOENT) { if (ret < 0 && errno != ENOENT) {
return -1; return -1;
@ -1124,7 +1124,7 @@ static int local_unlinkat_common(FsContext *ctx, int dirfd, const char *name,
} }
map_dirfd = openat_dir(dirfd, VIRTFS_META_DIR); map_dirfd = openat_dir(dirfd, VIRTFS_META_DIR);
if (map_dirfd != -1) { if (map_dirfd != -1) {
ret = unlinkat(map_dirfd, name, 0); ret = qemu_unlinkat(map_dirfd, name, 0);
close_preserve_errno(map_dirfd); close_preserve_errno(map_dirfd);
if (ret < 0 && errno != ENOENT) { if (ret < 0 && errno != ENOENT) {
return -1; return -1;
@ -1134,7 +1134,7 @@ static int local_unlinkat_common(FsContext *ctx, int dirfd, const char *name,
} }
} }
return unlinkat(dirfd, name, flags); return qemu_unlinkat(dirfd, name, flags);
} }
static int local_remove(FsContext *ctx, const char *path) static int local_remove(FsContext *ctx, const char *path)
@ -1151,7 +1151,7 @@ static int local_remove(FsContext *ctx, const char *path)
goto out; goto out;
} }
if (fstatat(dirfd, name, &stbuf, AT_SYMLINK_NOFOLLOW) < 0) { if (qemu_fstatat(dirfd, name, &stbuf, AT_SYMLINK_NOFOLLOW) < 0) {
goto err_out; goto err_out;
} }
@ -1296,7 +1296,7 @@ static int local_renameat(FsContext *ctx, V9fsPath *olddir,
return -1; return -1;
} }
ret = renameat(odirfd, old_name, ndirfd, new_name); ret = qemu_renameat(odirfd, old_name, ndirfd, new_name);
if (ret < 0) { if (ret < 0) {
goto out; goto out;
} }
@ -1304,7 +1304,7 @@ static int local_renameat(FsContext *ctx, V9fsPath *olddir,
if (ctx->export_flags & V9FS_SM_MAPPED_FILE) { if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
int omap_dirfd, nmap_dirfd; int omap_dirfd, nmap_dirfd;
ret = mkdirat(ndirfd, VIRTFS_META_DIR, 0700); ret = qemu_mkdirat(ndirfd, VIRTFS_META_DIR, 0700);
if (ret < 0 && errno != EEXIST) { if (ret < 0 && errno != EEXIST) {
goto err_undo_rename; goto err_undo_rename;
} }
@ -1321,7 +1321,7 @@ static int local_renameat(FsContext *ctx, V9fsPath *olddir,
} }
/* rename the .virtfs_metadata files */ /* rename the .virtfs_metadata files */
ret = renameat(omap_dirfd, old_name, nmap_dirfd, new_name); ret = qemu_renameat(omap_dirfd, old_name, nmap_dirfd, new_name);
close_preserve_errno(nmap_dirfd); close_preserve_errno(nmap_dirfd);
close_preserve_errno(omap_dirfd); close_preserve_errno(omap_dirfd);
if (ret < 0 && errno != ENOENT) { if (ret < 0 && errno != ENOENT) {

15
hw/9pfs/9p-util.h
View File

@ -94,6 +94,13 @@ static inline int errno_to_dotl(int err) {
#define qemu_fgetxattr fgetxattr #define qemu_fgetxattr fgetxattr
#endif #endif
#define qemu_openat openat
#define qemu_fstatat fstatat
#define qemu_mkdirat mkdirat
#define qemu_renameat renameat
#define qemu_utimensat utimensat
#define qemu_unlinkat unlinkat
static inline void close_preserve_errno(int fd) static inline void close_preserve_errno(int fd)
{ {
int serrno = errno; int serrno = errno;
@ -103,8 +110,8 @@ static inline void close_preserve_errno(int fd)
static inline int openat_dir(int dirfd, const char *name) static inline int openat_dir(int dirfd, const char *name)
{ {
return openat(dirfd, name, return qemu_openat(dirfd, name,
O_DIRECTORY | O_RDONLY | O_NOFOLLOW | O_PATH_9P_UTIL); O_DIRECTORY | O_RDONLY | O_NOFOLLOW | O_PATH_9P_UTIL);
} }
static inline int openat_file(int dirfd, const char *name, int flags, static inline int openat_file(int dirfd, const char *name, int flags,
@ -115,8 +122,8 @@ static inline int openat_file(int dirfd, const char *name, int flags,
#ifndef CONFIG_DARWIN #ifndef CONFIG_DARWIN
again: again:
#endif #endif
fd = openat(dirfd, name, flags | O_NOFOLLOW | O_NOCTTY | O_NONBLOCK, fd = qemu_openat(dirfd, name, flags | O_NOFOLLOW | O_NOCTTY | O_NONBLOCK,
mode); mode);
if (fd == -1) { if (fd == -1) {
#ifndef CONFIG_DARWIN #ifndef CONFIG_DARWIN
if (errno == EPERM && (flags & O_NOATIME)) { if (errno == EPERM && (flags & O_NOATIME)) {