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fs: Add new VFCF_xxx flags for va_filerev

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Richard Kojedzinszky <richard@kojedz.in> reported a problem via
email, where the Linux NFSv4.2 client did not detect a change in a
directory on a FreeBSD NFSv4.2 server.

Adding support for the NFSv4.2 change_attr_type attribute seems
to have fixed the problem. This requires that the server file system
indicate if it increments va_filerev by one, since that file attribute
is used for the NFSv4.2 change attribute.  Fuse requires an indication
that va_filerev is based on ctime.

This patch adds VFCF_FILEREVINC and VFCF_FILEREVCT to indicate this.

A future patch to the NFS server will use these flags.

(cherry picked from commit 1cd455f39d886f27c33f7726f79fc4cc566da7b3)
This commit is contained in:
Rick Macklem 2025-01-14 14:11:06 -08:00
parent 93836ff92b
commit 7773d509d8
2 changed files with 3 additions and 1 deletions
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2
sys/sys/mount.h
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@ -687,6 +687,8 @@ struct ovfsconf {
#define VFCF_SBDRY 0x01000000 /* Stop at Boundary: defer stop requests
to kernel->user (AST) transition */
#define VFCF_FILEMOUNT 0x02000000 /* allow mounting files */
#define VFCF_FILEREVINC 0x04000000 /* va_filerev is incr. by one */
#define VFCF_FILEREVCT 0x08000000 /* va_filerev is set to ctime */
typedef uint32_t fsctlop_t;

2
sys/ufs/ffs/ffs_vfsops.c
View file

@ -117,7 +117,7 @@ static struct vfsops ufs_vfsops = {
.vfs_susp_clean = process_deferred_inactive,
};
VFS_SET(ufs_vfsops, ufs, 0);
VFS_SET(ufs_vfsops, ufs, VFCF_FILEREVINC);
MODULE_VERSION(ufs, 1);
static b_strategy_t ffs_geom_strategy;