git: aaf65a13c06a - main - stand: add fs_ops.fs_flag
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Date: Wed, 20 Aug 2025 22:46:57 UTC
The branch main has been updated by sjg:
URL: https://cgit.FreeBSD.org/src/commit/?id=aaf65a13c06a2555257a75b7f2fe63319238cf4f
commit aaf65a13c06a2555257a75b7f2fe63319238cf4f
Author: Simon J. Gerraty <sjg@FreeBSD.org>
AuthorDate: 2025-08-20 22:42:35 +0000
Commit: Simon J. Gerraty <sjg@FreeBSD.org>
CommitDate: 2025-08-20 22:42:35 +0000
stand: add fs_ops.fs_flag
To avoid a layering violation in open() allow fs_ops to
indicate that devopen() should be skipped.
This is only true for pkgfs.
Sponsored by: Juniper Networks, Inc.
Differential Revision: https://reviews.freebsd.org/D51684
---
stand/libsa/bzipfs.c | 1 +
stand/libsa/cd9660.c | 1 +
stand/libsa/dosfs.c | 1 +
stand/libsa/ext2fs.c | 1 +
stand/libsa/gzipfs.c | 1 +
stand/libsa/nfs.c | 1 +
stand/libsa/open.c | 33 +++++++++++++++++++--------------
stand/libsa/pkgfs.c | 1 +
stand/libsa/splitfs.c | 1 +
stand/libsa/stand.h | 3 +++
stand/libsa/tftp.c | 1 +
stand/libsa/ufs.c | 1 +
12 files changed, 32 insertions(+), 14 deletions(-)
diff --git a/stand/libsa/bzipfs.c b/stand/libsa/bzipfs.c
index f4002796f0ae..ff7ec16e7dc6 100644
--- a/stand/libsa/bzipfs.c
+++ b/stand/libsa/bzipfs.c
@@ -68,6 +68,7 @@ static int bzf_stat(struct open_file *f, struct stat *sb);
#ifndef REGRESSION
struct fs_ops bzipfs_fsops = {
.fs_name = "bzip",
+ .fs_flags = 0,
.fo_open = bzf_open,
.fo_close = bzf_close,
.fo_read = bzf_read,
diff --git a/stand/libsa/cd9660.c b/stand/libsa/cd9660.c
index 973a7dddcda9..d1da39aa479a 100644
--- a/stand/libsa/cd9660.c
+++ b/stand/libsa/cd9660.c
@@ -81,6 +81,7 @@ static ISO_SUSP_HEADER *susp_lookup_record(struct open_file *f,
struct fs_ops cd9660_fsops = {
.fs_name = "cd9660",
+ .fs_flags = 0,
.fo_open = cd9660_open,
.fo_close = cd9660_close,
.fo_read = cd9660_read,
diff --git a/stand/libsa/dosfs.c b/stand/libsa/dosfs.c
index aca198cdf6fa..38610d917007 100644
--- a/stand/libsa/dosfs.c
+++ b/stand/libsa/dosfs.c
@@ -61,6 +61,7 @@ static int dos_unmount(const char *dev, void *data);
struct fs_ops dosfs_fsops = {
.fs_name = "dosfs",
+ .fs_flags = 0,
.fo_open = dos_open,
.fo_close = dos_close,
.fo_read = dos_read,
diff --git a/stand/libsa/ext2fs.c b/stand/libsa/ext2fs.c
index 47812f4543a1..f7096282f156 100644
--- a/stand/libsa/ext2fs.c
+++ b/stand/libsa/ext2fs.c
@@ -106,6 +106,7 @@ static int dtmap[] = { DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR,
struct fs_ops ext2fs_fsops = {
.fs_name = "ext2fs",
+ .fs_flags = 0,
.fo_open = ext2fs_open,
.fo_close = ext2fs_close,
.fo_read = ext2fs_read,
diff --git a/stand/libsa/gzipfs.c b/stand/libsa/gzipfs.c
index 6c2b8cac9e34..6b22f750f3ef 100644
--- a/stand/libsa/gzipfs.c
+++ b/stand/libsa/gzipfs.c
@@ -50,6 +50,7 @@ static int zf_stat(struct open_file *f, struct stat *sb);
struct fs_ops gzipfs_fsops = {
.fs_name = "zip",
+ .fs_flags = 0,
.fo_open = zf_open,
.fo_close = zf_close,
.fo_read = zf_read,
diff --git a/stand/libsa/nfs.c b/stand/libsa/nfs.c
index ee6af8a726c7..f3e9060c9881 100644
--- a/stand/libsa/nfs.c
+++ b/stand/libsa/nfs.c
@@ -131,6 +131,7 @@ struct nfs_iodesc nfs_root_node;
struct fs_ops nfs_fsops = {
.fs_name = "nfs",
+ .fs_flags = 0,
.fo_open = nfs_open,
.fo_close = nfs_close,
.fo_read = nfs_read,
diff --git a/stand/libsa/open.c b/stand/libsa/open.c
index ccee4aa5c07b..c97aa5977f9e 100644
--- a/stand/libsa/open.c
+++ b/stand/libsa/open.c
@@ -154,27 +154,32 @@ open(const char *fname, int mode)
f->f_devdata = NULL;
file = NULL;
+ if (exclusive_file_system == NULL ||
+ (exclusive_file_system->fs_flags & FS_OPS_NO_DEVOPEN) == 0) {
+ error = devopen(f, fname, &file);
+ if (error ||
+ (((f->f_flags & F_NODEV) == 0) && f->f_dev == NULL))
+ goto err;
+
+ /* see if we opened a raw device; otherwise, 'file' is the file name. */
+ if (file == NULL || *file == '\0') {
+ f->f_flags |= F_RAW;
+ f->f_rabuf = NULL;
+ TSEXIT();
+ return (fd);
+ }
+ } else
+ file = fname;
+
if (exclusive_file_system != NULL) {
+ /* loader is forcing the filesystem to be used */
fs = exclusive_file_system;
- error = (fs->fo_open)(fname, f);
+ error = (fs->fo_open)(file, f);
if (error == 0)
goto ok;
goto err;
}
- error = devopen(f, fname, &file);
- if (error ||
- (((f->f_flags & F_NODEV) == 0) && f->f_dev == NULL))
- goto err;
-
- /* see if we opened a raw device; otherwise, 'file' is the file name. */
- if (file == NULL || *file == '\0') {
- f->f_flags |= F_RAW;
- f->f_rabuf = NULL;
- TSEXIT();
- return (fd);
- }
-
/* pass file name to the different filesystem open routines */
besterror = ENOENT;
for (i = 0; file_system[i] != NULL; i++) {
diff --git a/stand/libsa/pkgfs.c b/stand/libsa/pkgfs.c
index 32d488de5cfb..6eb3badf7068 100644
--- a/stand/libsa/pkgfs.c
+++ b/stand/libsa/pkgfs.c
@@ -41,6 +41,7 @@ static off_t pkg_atol(const char *, unsigned);
struct fs_ops pkgfs_fsops = {
.fs_name = "pkg",
+ .fs_flags = FS_OPS_NO_DEVOPEN,
.fo_open = pkg_open,
.fo_close = pkg_close,
.fo_read = pkg_read,
diff --git a/stand/libsa/splitfs.c b/stand/libsa/splitfs.c
index 69912522000e..eb4b3a1feb11 100644
--- a/stand/libsa/splitfs.c
+++ b/stand/libsa/splitfs.c
@@ -50,6 +50,7 @@ static int splitfs_stat(struct open_file *f, struct stat *sb);
struct fs_ops splitfs_fsops = {
.fs_name = "split",
+ .fs_flags = 0,
.fo_open = splitfs_open,
.fo_close = splitfs_close,
.fo_read = splitfs_read,
diff --git a/stand/libsa/stand.h b/stand/libsa/stand.h
index 0e99d8778fa6..c6a08be2f7e3 100644
--- a/stand/libsa/stand.h
+++ b/stand/libsa/stand.h
@@ -94,6 +94,8 @@ __BEGIN_DECLS
struct open_file;
+#define FS_OPS_NO_DEVOPEN 1
+
/*
* This structure is used to define file system operations in a file system
* independent way.
@@ -104,6 +106,7 @@ struct open_file;
*/
struct fs_ops {
const char *fs_name;
+ int fs_flags;
int (*fo_open)(const char *path, struct open_file *f);
int (*fo_close)(struct open_file *f);
int (*fo_read)(struct open_file *f, void *buf,
diff --git a/stand/libsa/tftp.c b/stand/libsa/tftp.c
index c6cc8f11a765..0584246a6dea 100644
--- a/stand/libsa/tftp.c
+++ b/stand/libsa/tftp.c
@@ -73,6 +73,7 @@ static int tftp_preload(struct open_file *);
struct fs_ops tftp_fsops = {
.fs_name = "tftp",
+ .fs_flags = 0,
.fo_open = tftp_open,
.fo_close = tftp_close,
.fo_read = tftp_read,
diff --git a/stand/libsa/ufs.c b/stand/libsa/ufs.c
index e1d540ed2321..86cd3be9a27a 100644
--- a/stand/libsa/ufs.c
+++ b/stand/libsa/ufs.c
@@ -93,6 +93,7 @@ static int ufs_unmount(const char *dev, void *data);
struct fs_ops ufs_fsops = {
.fs_name = "ufs",
+ .fs_flags = 0,
.fo_open = ufs_open,
.fo_close = ufs_close,
.fo_read = ufs_read,