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| 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/bsm | |
| parent | 43623d0ce7ac4cbe47b94c69077ce5b268fb05cf (diff) | |
| download | src-test2-0573d0a9b8ec478348cbf2a7ec370c875eb57dff.tar.gz src-test2-0573d0a9b8ec478348cbf2a7ec370c875eb57dff.zip | |
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/bsm')
| -rw-r--r-- | sys/bsm/audit_kevents.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sys/bsm/audit_kevents.h b/sys/bsm/audit_kevents.h index 195194887db4..58582e235635 100644 --- a/sys/bsm/audit_kevents.h +++ b/sys/bsm/audit_kevents.h @@ -657,6 +657,7 @@ #define AUE_LGETUUID 43261 /* CADETS. */ #define AUE_EXECVEAT 43262 /* FreeBSD/Linux. */ #define AUE_SHMRENAME 43263 /* FreeBSD-specific. */ +#define AUE_REALPATHAT 43264 /* FreeBSD-specific. */ /* * Darwin BSM uses a number of AUE_O_* definitions, which are aliased to the |