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namei: add NDPREINIT() macro

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Its intent is to do the initialization of the future part of struct nameidata
which should be used across several namei() and VOPs.  Right now it is NOP.

Reviewed by:	mckusick
Discussed with:	markj
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
Differential revision:	https://reviews.freebsd.org/D30041
This commit is contained in:
Konstantin Belousov 2021-06-14 22:03:41 +03:00
parent 71faea9307
commit 802cf4ab0e
2 changed files with 12 additions and 0 deletions
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9
sys/kern/vfs_syscalls.c
View file

@ -1328,6 +1328,7 @@ kern_mknodat(struct thread *td, int fd, const char *path, enum uio_seg pathseg,
}
if (error != 0)
return (error);
NDPREINIT(&nd);
restart:
bwillwrite();
NDINIT_ATRIGHTS(&nd, CREATE, LOCKPARENT | SAVENAME | AUDITVNODE1 |
@ -1436,6 +1437,7 @@ kern_mkfifoat(struct thread *td, int fd, const char *path,
int error;
AUDIT_ARG_MODE(mode);
NDPREINIT(&nd);
restart:
bwillwrite();
NDINIT_ATRIGHTS(&nd, CREATE, LOCKPARENT | SAVENAME | AUDITVNODE1 |
@ -1566,6 +1568,7 @@ kern_linkat(struct thread *td, int fd1, int fd2, const char *path1,
struct nameidata nd;
int error;
NDPREINIT(&nd);
do {
bwillwrite();
NDINIT_ATRIGHTS(&nd, LOOKUP, AUDITVNODE1 | at2cnpflags(flag,
@ -1714,6 +1717,7 @@ kern_symlinkat(struct thread *td, const char *path1, int fd, const char *path2,
syspath = tmppath;
}
AUDIT_ARG_TEXT(syspath);
NDPREINIT(&nd);
restart:
bwillwrite();
NDINIT_ATRIGHTS(&nd, CREATE, LOCKPARENT | SAVENAME | AUDITVNODE1 |
@ -1778,6 +1782,7 @@ sys_undelete(struct thread *td, struct undelete_args *uap)
struct nameidata nd;
int error;
NDPREINIT(&nd);
restart:
bwillwrite();
NDINIT(&nd, DELETE, LOCKPARENT | DOWHITEOUT | AUDITVNODE1,
@ -1891,6 +1896,7 @@ kern_funlinkat(struct thread *td, int dfd, const char *path, int fd,
return (error);
}
NDPREINIT(&nd);
restart:
bwillwrite();
NDINIT_ATRIGHTS(&nd, DELETE, LOCKPARENT | LOCKLEAF | AUDITVNODE1 |
@ -3422,6 +3428,7 @@ kern_truncate(struct thread *td, const char *path, enum uio_seg pathseg,
if (length < 0)
return (EINVAL);
NDPREINIT(&nd);
retry:
NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNODE1, pathseg, path, td);
if ((error = namei(&nd)) != 0)
@ -3789,6 +3796,7 @@ kern_mkdirat(struct thread *td, int fd, const char *path, enum uio_seg segflg,
int error;
AUDIT_ARG_MODE(mode);
NDPREINIT(&nd);
restart:
bwillwrite();
NDINIT_ATRIGHTS(&nd, CREATE, LOCKPARENT | SAVENAME | AUDITVNODE1 |
@ -3859,6 +3867,7 @@ kern_frmdirat(struct thread *td, int dfd, const char *path, int fd,
return (error);
}
NDPREINIT(&nd);
restart:
bwillwrite();
NDINIT_ATRIGHTS(&nd, DELETE, LOCKPARENT | LOCKLEAF | AUDITVNODE1 |

3
sys/sys/namei.h
View file

@ -265,6 +265,9 @@ do { \
_ndp->ni_startdir = NULL; \
} while (0)
#define NDPREINIT(ndp) do { \
} while (0)
#define NDF_NO_DVP_RELE 0x00000001
#define NDF_NO_DVP_UNLOCK 0x00000002
#define NDF_NO_DVP_PUT 0x00000003