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| author | Ka Ho Ng <khng@FreeBSD.org> | 2021-09-11 12:03:38 +0000 |
|---|---|---|
| committer | Ka Ho Ng <khng@FreeBSD.org> | 2021-09-11 12:04:52 +0000 |
| commit | 3703c18883341f3ff09c42d7f3b36ab80e4a071b (patch) | |
| tree | 2463648a1f0b2dc6446e65cfcac0de59bcc33d66 /sbin/mdconfig/mdconfig.c | |
| parent | 71a1ae7cebd3791d4d18ac9620a7a4ce8cf15819 (diff) | |
| download | src-3703c18883341f3ff09c42d7f3b36ab80e4a071b.tar.gz src-3703c18883341f3ff09c42d7f3b36ab80e4a071b.zip | |
md: Add MD_MUSTDEALLOC support
This adds an option to detect if hole-punching is implemented by the
underlying file system. If this flag is set, and if the underlying file
system does not support hole-punching, md(4) fails BIO_DELETE requests
with EOPNOTSUPP.
Sponsored by: The FreeBSD Foundation
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D31883
Diffstat (limited to 'sbin/mdconfig/mdconfig.c')
| -rw-r--r-- | sbin/mdconfig/mdconfig.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sbin/mdconfig/mdconfig.c b/sbin/mdconfig/mdconfig.c index 0f76ca6149f1..9f4f3fc3a392 100644 --- a/sbin/mdconfig/mdconfig.c +++ b/sbin/mdconfig/mdconfig.c @@ -89,7 +89,8 @@ usage(void) " mdconfig file\n"); fprintf(stderr, "\t\ttype = {malloc, vnode, swap}\n"); fprintf(stderr, "\t\toption = {cache, cluster, compress, force,\n"); - fprintf(stderr, "\t\t readonly, reserve, ro, verify}\n"); + fprintf(stderr, "\t\t mustdealloc, readonly, reserve, ro,\n"); + fprintf(stderr, "\t\t verify}\n"); fprintf(stderr, "\t\tsize = %%d (512 byte blocks), %%db (B),\n"); fprintf(stderr, "\t\t %%dk (kB), %%dm (MB), %%dg (GB), \n"); fprintf(stderr, "\t\t %%dt (TB), or %%dp (PB)\n"); @@ -194,6 +195,10 @@ main(int argc, char **argv) mdio.md_options |= MD_FORCE; else if (!strcmp(optarg, "noforce")) mdio.md_options &= ~MD_FORCE; + else if (!strcmp(optarg, "mustdealloc")) + mdio.md_options |= MD_MUSTDEALLOC; + else if (!strcmp(optarg, "nomustdealloc")) + mdio.md_options &= ~MD_MUSTDEALLOC; else if (!strcmp(optarg, "readonly")) mdio.md_options |= MD_READONLY; else if (!strcmp(optarg, "noreadonly")) |