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| author | Konstantin Belousov <kib@FreeBSD.org> | 2024-01-19 21:36:50 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2024-01-24 05:11:26 +0000 |
| commit | 5c41d888de1aba0e82531fb6df4cc3b6989d37bd (patch) | |
| tree | 7388d12c4c0e631010d3b5cf07bd157f220f29af | |
| parent | f04220c1b0641fa68d01dc85d9fef706b02f4079 (diff) | |
| download | src-5c41d888de1aba0e82531fb6df4cc3b6989d37bd.tar.gz src-5c41d888de1aba0e82531fb6df4cc3b6989d37bd.zip | |
kcmp(2): implement for devfs files
Compare not vnodes, which are different between mount points, but
actual cdev referenced by the devfs node.
Reviewed by: brooks, markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D43518
| -rw-r--r-- | sys/fs/devfs/devfs_vnops.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sys/fs/devfs/devfs_vnops.c b/sys/fs/devfs/devfs_vnops.c index fbb314dbbe79..3b8a624fe620 100644 --- a/sys/fs/devfs/devfs_vnops.c +++ b/sys/fs/devfs/devfs_vnops.c @@ -2010,6 +2010,14 @@ dev2udev(struct cdev *x) return (cdev2priv(x)->cdp_inode); } +static int +devfs_cmp_f(struct file *fp1, struct file *fp2, struct thread *td) +{ + if (fp2->f_type != DTYPE_VNODE || fp2->f_ops != &devfs_ops_f) + return (3); + return (kcmp_cmp((uintptr_t)fp1->f_data, (uintptr_t)fp2->f_data)); +} + static struct fileops devfs_ops_f = { .fo_read = devfs_read_f, .fo_write = devfs_write_f, @@ -2025,6 +2033,7 @@ static struct fileops devfs_ops_f = { .fo_seek = vn_seek, .fo_fill_kinfo = vn_fill_kinfo, .fo_mmap = devfs_mmap_f, + .fo_cmp = devfs_cmp_f, .fo_flags = DFLAG_PASSABLE | DFLAG_SEEKABLE }; |