diff options
| author | Mateusz Guzik <mjg@FreeBSD.org> | 2020-02-20 16:58:19 +0000 |
|---|---|---|
| committer | Mateusz Guzik <mjg@FreeBSD.org> | 2020-02-20 16:58:19 +0000 |
| commit | 0573d0a9b8ec478348cbf2a7ec370c875eb57dff (patch) | |
| tree | 11b7e9f241b8fd9cad66b1f30bce46c6083e161c /sys/compat/freebsd32 | |
| parent | 43623d0ce7ac4cbe47b94c69077ce5b268fb05cf (diff) | |
vfs: add realpathat syscall
realpath(3) is used a lot e.g., by clang and is a major source of getcwd
and fstatat calls. This can be done more efficiently in the kernel.
This works by performing a regular lookup while saving the name and found
parent directory. If the terminal vnode is a directory we can resolve it using
usual means. Otherwise we can use the name saved by lookup and resolve the
parent.
See the review for sample syscall counts.
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D23574
Notes
Notes:
svn path=/head/; revision=358172
Diffstat (limited to 'sys/compat/freebsd32')
| -rw-r--r-- | sys/compat/freebsd32/syscalls.master | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/compat/freebsd32/syscalls.master b/sys/compat/freebsd32/syscalls.master index a82d75d26e22..049e0b78500c 100644 --- a/sys/compat/freebsd32/syscalls.master +++ b/sys/compat/freebsd32/syscalls.master @@ -1160,5 +1160,7 @@ 572 AUE_SHMRENAME NOPROTO { int shm_rename(const char *path_from, \ const char *path_to, int flags); } 573 AUE_NULL NOPROTO { int sigfastblock(int cmd, uint32_t *ptr); } +574 AUE_REALPATHAT NOPROTO { int __realpathat(int fd, const char *path, \ + char *buf, size_t size, int flags); } ; vim: syntax=off |