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-rw-r--r--arch/alpha/include/asm/fcntl.h19
-rw-r--r--arch/blackfin/include/asm/fcntl.h2
-rw-r--r--arch/mips/include/asm/fcntl.h17
-rw-r--r--arch/mips/kernel/kspd.c1
-rw-r--r--arch/mips/loongson/common/mem.c2
-rw-r--r--arch/mips/mm/cache.c2
-rw-r--r--arch/parisc/include/asm/fcntl.h5
-rw-r--r--arch/sparc/include/asm/fcntl.h19
-rw-r--r--arch/x86/mm/pat.c3
-rw-r--r--drivers/char/mem.c6
-rw-r--r--drivers/usb/gadget/file_storage.c2
-rw-r--r--fs/afs/write.c5
-rw-r--r--fs/btrfs/file.c4
-rw-r--r--fs/cifs/dir.c3
-rw-r--r--fs/cifs/file.c6
-rw-r--r--fs/namei.c9
-rw-r--r--fs/nfs/file.c4
-rw-r--r--fs/nfs/write.c2
-rw-r--r--fs/ocfs2/file.c2
-rw-r--r--fs/sync.c5
-rw-r--r--fs/ubifs/file.c2
-rw-r--r--fs/xfs/linux-2.6/xfs_lrw.c2
-rw-r--r--include/asm-generic/fcntl.h25
-rw-r--r--sound/core/rawmidi.c2
24 files changed, 109 insertions, 40 deletions
diff --git a/arch/alpha/include/asm/fcntl.h b/arch/alpha/include/asm/fcntl.h
index 25da0017ec87..21b1117a0c61 100644
--- a/arch/alpha/include/asm/fcntl.h
+++ b/arch/alpha/include/asm/fcntl.h
@@ -1,8 +1,6 @@
#ifndef _ALPHA_FCNTL_H
#define _ALPHA_FCNTL_H
-/* open/fcntl - O_SYNC is only implemented on blocks devices and on files
- located on an ext2 file system */
#define O_CREAT 01000 /* not fcntl */
#define O_TRUNC 02000 /* not fcntl */
#define O_EXCL 04000 /* not fcntl */
@@ -10,13 +8,28 @@
#define O_NONBLOCK 00004
#define O_APPEND 00010
-#define O_SYNC 040000
+#define O_DSYNC 040000 /* used to be O_SYNC, see below */
#define O_DIRECTORY 0100000 /* must be a directory */
#define O_NOFOLLOW 0200000 /* don't follow links */
#define O_LARGEFILE 0400000 /* will be set by the kernel on every open */
#define O_DIRECT 02000000 /* direct disk access - should check with OSF/1 */
#define O_NOATIME 04000000
#define O_CLOEXEC 010000000 /* set close_on_exec */
+/*
+ * Before Linux 2.6.32 only O_DSYNC semantics were implemented, but using
+ * the O_SYNC flag. We continue to use the existing numerical value
+ * for O_DSYNC semantics now, but using the correct symbolic name for it.
+ * This new value is used to request true Posix O_SYNC semantics. It is
+ * defined in this strange way to make sure applications compiled against
+ * new headers get at least O_DSYNC semantics on older kernels.
+ *
+ * This has the nice side-effect that we can simply test for O_DSYNC
+ * wherever we do not care if O_DSYNC or O_SYNC is used.
+ *
+ * Note: __O_SYNC must never be used directly.
+ */
+#define __O_SYNC 020000000
+#define O_SYNC (__O_SYNC|O_DSYNC)
#define F_GETLK 7
#define F_SETLK 8
diff --git a/arch/blackfin/include/asm/fcntl.h b/arch/blackfin/include/asm/fcntl.h
index 8727b2b382f1..251c911d59c1 100644
--- a/arch/blackfin/include/asm/fcntl.h
+++ b/arch/blackfin/include/asm/fcntl.h
@@ -7,8 +7,6 @@
#ifndef _BFIN_FCNTL_H
#define _BFIN_FCNTL_H
-/* open/fcntl - O_SYNC is only implemented on blocks devices and on files
- located on an ext2 file system */
#define O_DIRECTORY 040000 /* must be a directory */
#define O_NOFOLLOW 0100000 /* don't follow links */
#define O_DIRECT 0200000 /* direct disk access hint - currently ignored */
diff --git a/arch/mips/include/asm/fcntl.h b/arch/mips/include/asm/fcntl.h
index 2a52333a062d..7c6681aa2ab8 100644
--- a/arch/mips/include/asm/fcntl.h
+++ b/arch/mips/include/asm/fcntl.h
@@ -10,7 +10,7 @@
#define O_APPEND 0x0008
-#define O_SYNC 0x0010
+#define O_DSYNC 0x0010 /* used to be O_SYNC, see below */
#define O_NONBLOCK 0x0080
#define O_CREAT 0x0100 /* not fcntl */
#define O_TRUNC 0x0200 /* not fcntl */
@@ -18,6 +18,21 @@
#define O_NOCTTY 0x0800 /* not fcntl */
#define FASYNC 0x1000 /* fcntl, for BSD compatibility */
#define O_LARGEFILE 0x2000 /* allow large file opens */
+/*
+ * Before Linux 2.6.32 only O_DSYNC semantics were implemented, but using
+ * the O_SYNC flag. We continue to use the existing numerical value
+ * for O_DSYNC semantics now, but using the correct symbolic name for it.
+ * This new value is used to request true Posix O_SYNC semantics. It is
+ * defined in this strange way to make sure applications compiled against
+ * new headers get at least O_DSYNC semantics on older kernels.
+ *
+ * This has the nice side-effect that we can simply test for O_DSYNC
+ * wherever we do not care if O_DSYNC or O_SYNC is used.
+ *
+ * Note: __O_SYNC must never be used directly.
+ */
+#define __O_SYNC 0x4000
+#define O_SYNC (__O_SYNC|O_DSYNC)
#define O_DIRECT 0x8000 /* direct disk access hint */
#define F_GETLK 14
diff --git a/arch/mips/kernel/kspd.c b/arch/mips/kernel/kspd.c
index ad4e017ed2f3..80e2ba694bab 100644
--- a/arch/mips/kernel/kspd.c
+++ b/arch/mips/kernel/kspd.c
@@ -82,6 +82,7 @@ static int sp_stopping;
#define MTSP_O_SHLOCK 0x0010
#define MTSP_O_EXLOCK 0x0020
#define MTSP_O_ASYNC 0x0040
+/* XXX: check which of these is actually O_SYNC vs O_DSYNC */
#define MTSP_O_FSYNC O_SYNC
#define MTSP_O_NOFOLLOW 0x0100
#define MTSP_O_SYNC 0x0080
diff --git a/arch/mips/loongson/common/mem.c b/arch/mips/loongson/common/mem.c
index 7c92f79b6480..e94ef158f980 100644
--- a/arch/mips/loongson/common/mem.c
+++ b/arch/mips/loongson/common/mem.c
@@ -26,7 +26,7 @@ void __init prom_init_memory(void)
/* override of arch/mips/mm/cache.c: __uncached_access */
int __uncached_access(struct file *file, unsigned long addr)
{
- if (file->f_flags & O_SYNC)
+ if (file->f_flags & O_DSYNC)
return 1;
return addr >= __pa(high_memory) ||
diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c
index 694d51f523d1..102b2dfa542a 100644
--- a/arch/mips/mm/cache.c
+++ b/arch/mips/mm/cache.c
@@ -194,7 +194,7 @@ void __devinit cpu_cache_init(void)
int __weak __uncached_access(struct file *file, unsigned long addr)
{
- if (file->f_flags & O_SYNC)
+ if (file->f_flags & O_DSYNC)
return 1;
return addr >= __pa(high_memory);
diff --git a/arch/parisc/include/asm/fcntl.h b/arch/parisc/include/asm/fcntl.h
index 1e1c824764ee..f357fc693c89 100644
--- a/arch/parisc/include/asm/fcntl.h
+++ b/arch/parisc/include/asm/fcntl.h
@@ -1,14 +1,13 @@
#ifndef _PARISC_FCNTL_H
#define _PARISC_FCNTL_H
-/* open/fcntl - O_SYNC is only implemented on blocks devices and on files
- located on an ext2 file system */
#define O_APPEND 000000010
#define O_BLKSEEK 000000100 /* HPUX only */
#define O_CREAT 000000400 /* not fcntl */
#define O_EXCL 000002000 /* not fcntl */
#define O_LARGEFILE 000004000
-#define O_SYNC 000100000
+#define __O_SYNC 000100000
+#define O_SYNC (__O_SYNC|O_DSYNC)
#define O_NONBLOCK 000200004 /* HPUX has separate NDELAY & NONBLOCK */
#define O_NOCTTY 000400000 /* not fcntl */
#define O_DSYNC 001000000 /* HPUX only */
diff --git a/arch/sparc/include/asm/fcntl.h b/arch/sparc/include/asm/fcntl.h
index d4d9c9d852c3..3b9cfb39175e 100644
--- a/arch/sparc/include/asm/fcntl.h
+++ b/arch/sparc/include/asm/fcntl.h
@@ -1,14 +1,12 @@
#ifndef _SPARC_FCNTL_H
#define _SPARC_FCNTL_H
-/* open/fcntl - O_SYNC is only implemented on blocks devices and on files
- located on an ext2 file system */
#define O_APPEND 0x0008
#define FASYNC 0x0040 /* fcntl, for BSD compatibility */
#define O_CREAT 0x0200 /* not fcntl */
#define O_TRUNC 0x0400 /* not fcntl */
#define O_EXCL 0x0800 /* not fcntl */
-#define O_SYNC 0x2000
+#define O_DSYNC 0x2000 /* used to be O_SYNC, see below */
#define O_NONBLOCK 0x4000
#if defined(__sparc__) && defined(__arch64__)
#define O_NDELAY 0x0004
@@ -20,6 +18,21 @@
#define O_DIRECT 0x100000 /* direct disk access hint */
#define O_NOATIME 0x200000
#define O_CLOEXEC 0x400000
+/*
+ * Before Linux 2.6.32 only O_DSYNC semantics were implemented, but using
+ * the O_SYNC flag. We continue to use the existing numerical value
+ * for O_DSYNC semantics now, but using the correct symbolic name for it.
+ * This new value is used to request true Posix O_SYNC semantics. It is
+ * defined in this strange way to make sure applications compiled against
+ * new headers get at least O_DSYNC semantics on older kernels.
+ *
+ * This has the nice side-effect that we can simply test for O_DSYNC
+ * wherever we do not care if O_DSYNC or O_SYNC is used.
+ *
+ * Note: __O_SYNC must never be used directly.
+ */
+#define __O_SYNC 0x800000
+#define O_SYNC (__O_SYNC|O_DSYNC)
#define F_GETOWN 5 /* for sockets. */
#define F_SETOWN 6 /* for sockets. */
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index 66b55d6e69ed..ae9648eb1c7f 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -704,9 +704,8 @@ int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
if (!range_is_allowed(pfn, size))
return 0;
- if (file->f_flags & O_SYNC) {
+ if (file->f_flags & O_DSYNC)
flags = _PAGE_CACHE_UC_MINUS;
- }
#ifdef CONFIG_X86_32
/*
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 30eff80fed6f..fba76fb55abf 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -43,7 +43,7 @@ static inline int uncached_access(struct file *file, unsigned long addr)
{
#if defined(CONFIG_IA64)
/*
- * On ia64, we ignore O_SYNC because we cannot tolerate memory attribute aliases.
+ * On ia64, we ignore O_DSYNC because we cannot tolerate memory attribute aliases.
*/
return !(efi_mem_attributes(addr) & EFI_MEMORY_WB);
#elif defined(CONFIG_MIPS)
@@ -56,9 +56,9 @@ static inline int uncached_access(struct file *file, unsigned long addr)
#else
/*
* Accessing memory above the top the kernel knows about or through a file pointer
- * that was marked O_SYNC will be done non-cached.
+ * that was marked O_DSYNC will be done non-cached.
*/
- if (file->f_flags & O_SYNC)
+ if (file->f_flags & O_DSYNC)
return 1;
return addr >= __pa(high_memory);
#endif
diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c
index 1e6aa504d58a..5e14dbaf65bc 100644
--- a/drivers/usb/gadget/file_storage.c
+++ b/drivers/usb/gadget/file_storage.c
@@ -1713,7 +1713,7 @@ static int do_write(struct fsg_dev *fsg)
}
if (fsg->cmnd[1] & 0x08) { // FUA
spin_lock(&curlun->filp->f_lock);
- curlun->filp->f_flags |= O_SYNC;
+ curlun->filp->f_flags |= O_DSYNC;
spin_unlock(&curlun->filp->f_lock);
}
}
diff --git a/fs/afs/write.c b/fs/afs/write.c
index c63a3c8beb73..6be1bc31616a 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -692,8 +692,9 @@ ssize_t afs_file_write(struct kiocb *iocb, const struct iovec *iov,
}
/* return error values for O_SYNC and IS_SYNC() */
- if (IS_SYNC(&vnode->vfs_inode) || iocb->ki_filp->f_flags & O_SYNC) {
- ret = afs_fsync(iocb->ki_filp, dentry, 1);
+ if (IS_SYNC(&vnode->vfs_inode) || iocb->ki_filp->f_flags & O_DSYNC) {
+ ret = afs_fsync(iocb->ki_filp, dentry,
+ (iocb->ki_filp->f_flags & __O_SYNC) ? 0 : 1);
if (ret < 0)
result = ret;
}
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 06550affbd27..77f759302e12 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -909,7 +909,7 @@ static ssize_t btrfs_file_write(struct file *file, const char __user *buf,
unsigned long last_index;
int will_write;
- will_write = ((file->f_flags & O_SYNC) || IS_SYNC(inode) ||
+ will_write = ((file->f_flags & O_DSYNC) || IS_SYNC(inode) ||
(file->f_flags & O_DIRECT));
nrptrs = min((count + PAGE_CACHE_SIZE - 1) / PAGE_CACHE_SIZE,
@@ -1076,7 +1076,7 @@ out_nolock:
if (err)
num_written = err;
- if ((file->f_flags & O_SYNC) || IS_SYNC(inode)) {
+ if ((file->f_flags & O_DSYNC) || IS_SYNC(inode)) {
trans = btrfs_start_transaction(root, 1);
ret = btrfs_log_dentry_safe(trans, root,
file->f_dentry);
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 1f42f772865a..6ccf7262d1b7 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -214,7 +214,8 @@ int cifs_posix_open(char *full_path, struct inode **pinode,
posix_flags |= SMB_O_EXCL;
if (oflags & O_TRUNC)
posix_flags |= SMB_O_TRUNC;
- if (oflags & O_SYNC)
+ /* be safe and imply O_SYNC for O_DSYNC */
+ if (oflags & O_DSYNC)
posix_flags |= SMB_O_SYNC;
if (oflags & O_DIRECTORY)
posix_flags |= SMB_O_DIRECTORY;
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 429337eb7afe..057e1dae12ab 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -76,8 +76,10 @@ static inline fmode_t cifs_posix_convert_flags(unsigned int flags)
reopening a file. They had their effect on the original open */
if (flags & O_APPEND)
posix_flags |= (fmode_t)O_APPEND;
- if (flags & O_SYNC)
- posix_flags |= (fmode_t)O_SYNC;
+ if (flags & O_DSYNC)
+ posix_flags |= (fmode_t)O_DSYNC;
+ if (flags & __O_SYNC)
+ posix_flags |= (fmode_t)__O_SYNC;
if (flags & O_DIRECTORY)
posix_flags |= (fmode_t)O_DIRECTORY;
if (flags & O_NOFOLLOW)
diff --git a/fs/namei.c b/fs/namei.c
index d11f404667e9..b83d38f614ff 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1678,6 +1678,15 @@ struct file *do_filp_open(int dfd, const char *pathname,
int will_write;
int flag = open_to_namei_flags(open_flag);
+ /*
+ * O_SYNC is implemented as __O_SYNC|O_DSYNC. As many places only
+ * check for O_DSYNC if the need any syncing at all we enforce it's
+ * always set instead of having to deal with possibly weird behaviour
+ * for malicious applications setting only __O_SYNC.
+ */
+ if (open_flag & __O_SYNC)
+ open_flag |= O_DSYNC;
+
if (!acc_mode)
acc_mode = MAY_OPEN | ACC_MODE(flag);
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index f5fdd39e037a..6b891328f332 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -581,7 +581,7 @@ static int nfs_need_sync_write(struct file *filp, struct inode *inode)
{
struct nfs_open_context *ctx;
- if (IS_SYNC(inode) || (filp->f_flags & O_SYNC))
+ if (IS_SYNC(inode) || (filp->f_flags & O_DSYNC))
return 1;
ctx = nfs_file_open_context(filp);
if (test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags))
@@ -622,7 +622,7 @@ static ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov,
nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, count);
result = generic_file_aio_write(iocb, iov, nr_segs, pos);
- /* Return error values for O_SYNC and IS_SYNC() */
+ /* Return error values for O_DSYNC and IS_SYNC() */
if (result >= 0 && nfs_need_sync_write(iocb->ki_filp, inode)) {
int err = nfs_do_fsync(nfs_file_open_context(iocb->ki_filp), inode);
if (err < 0)
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index c84b5cc1a943..b1ce2ea9b93b 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -774,7 +774,7 @@ int nfs_updatepage(struct file *file, struct page *page,
*/
if (nfs_write_pageuptodate(page, inode) &&
inode->i_flock == NULL &&
- !(file->f_flags & O_SYNC)) {
+ !(file->f_flags & O_DSYNC)) {
count = max(count + offset, nfs_page_length(page));
offset = 0;
}
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index de059f490586..3d30a1c974a8 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2006,7 +2006,7 @@ out_dio:
/* buffered aio wouldn't have proper lock coverage today */
BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT));
- if ((file->f_flags & O_SYNC && !direct_io) || IS_SYNC(inode)) {
+ if ((file->f_flags & O_DSYNC && !direct_io) || IS_SYNC(inode)) {
ret = filemap_fdatawrite_range(file->f_mapping, pos,
pos + count - 1);
if (ret < 0)
diff --git a/fs/sync.c b/fs/sync.c
index d104591b066b..b75ca68dc081 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -295,10 +295,11 @@ SYSCALL_DEFINE1(fdatasync, unsigned int, fd)
*/
int generic_write_sync(struct file *file, loff_t pos, loff_t count)
{
- if (!(file->f_flags & O_SYNC) && !IS_SYNC(file->f_mapping->host))
+ if (!(file->f_flags & O_DSYNC) && !IS_SYNC(file->f_mapping->host))
return 0;
return vfs_fsync_range(file, file->f_path.dentry, pos,
- pos + count - 1, 1);
+ pos + count - 1,
+ (file->f_flags & __O_SYNC) ? 0 : 1);
}
EXPORT_SYMBOL(generic_write_sync);
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 1009adc8d602..eaa3d480bc20 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1401,7 +1401,7 @@ static ssize_t ubifs_aio_write(struct kiocb *iocb, const struct iovec *iov,
if (ret < 0)
return ret;
- if (ret > 0 && (IS_SYNC(inode) || iocb->ki_filp->f_flags & O_SYNC)) {
+ if (ret > 0 && (IS_SYNC(inode) || iocb->ki_filp->f_flags & O_DSYNC)) {
err = ubifs_sync_wbufs_by_inode(c, inode);
if (err)
return err;
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 072050f8d346..339c52b1a434 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -811,7 +811,7 @@ write_retry:
XFS_STATS_ADD(xs_write_bytes, ret);
/* Handle various SYNC-type writes */
- if ((file->f_flags & O_SYNC) || IS_SYNC(inode)) {
+ if ((file->f_flags & O_DSYNC) || IS_SYNC(inode)) {
loff_t end = pos + ret - 1;
int error2;
diff --git a/include/asm-generic/fcntl.h b/include/asm-generic/fcntl.h
index 495dc8af4044..681ddf3e844c 100644
--- a/include/asm-generic/fcntl.h
+++ b/include/asm-generic/fcntl.h
@@ -3,8 +3,6 @@
#include <linux/types.h>
-/* open/fcntl - O_SYNC is only implemented on blocks devices and on files
- located on an ext2 file system */
#define O_ACCMODE 00000003
#define O_RDONLY 00000000
#define O_WRONLY 00000001
@@ -27,8 +25,8 @@
#ifndef O_NONBLOCK
#define O_NONBLOCK 00004000
#endif
-#ifndef O_SYNC
-#define O_SYNC 00010000
+#ifndef O_DSYNC
+#define O_DSYNC 00010000 /* used to be O_SYNC, see below */
#endif
#ifndef FASYNC
#define FASYNC 00020000 /* fcntl, for BSD compatibility */
@@ -51,6 +49,25 @@
#ifndef O_CLOEXEC
#define O_CLOEXEC 02000000 /* set close_on_exec */
#endif
+
+/*
+ * Before Linux 2.6.32 only O_DSYNC semantics were implemented, but using
+ * the O_SYNC flag. We continue to use the existing numerical value
+ * for O_DSYNC semantics now, but using the correct symbolic name for it.
+ * This new value is used to request true Posix O_SYNC semantics. It is
+ * defined in this strange way to make sure applications compiled against
+ * new headers get at least O_DSYNC semantics on older kernels.
+ *
+ * This has the nice side-effect that we can simply test for O_DSYNC
+ * wherever we do not care if O_DSYNC or O_SYNC is used.
+ *
+ * Note: __O_SYNC must never be used directly.
+ */
+#ifndef O_SYNC
+#define __O_SYNC 04000000
+#define O_SYNC (__O_SYNC|O_DSYNC)
+#endif
+
#ifndef O_NDELAY
#define O_NDELAY O_NONBLOCK
#endif
diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c
index 2f766123b158..0f5a194695d9 100644
--- a/sound/core/rawmidi.c
+++ b/sound/core/rawmidi.c
@@ -1257,7 +1257,7 @@ static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf,
break;
count -= count1;
}
- if (file->f_flags & O_SYNC) {
+ if (file->f_flags & O_DSYNC) {
spin_lock_irq(&runtime->lock);
while (runtime->avail != runtime->buffer_size) {
wait_queue_t wait;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-04 01:33:11 +0000