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Add inode retention bit

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Add a bit to the private scoutfs inode flags which indicates that the
inode is in retention mode.  The bit is visible through the _attr_x
interface.  It can only be set on regular files and when set it prevents
modification to all but non-user xattrs.  It can be cleared by root.

Signed-off-by: Zach Brown <zab@versity.com>
This commit is contained in:
Zach Brown
2024-06-28 15:09:05 -07:00
parent 5a53e7144d
commit fb5331a1d9
11 changed files with 142 additions and 2 deletions
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utils/src/attr_x.c
+13
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@@ -81,6 +81,7 @@ static int do_attr_x(struct attr_x_args *args)
pr(iax, CTIME, "ctime", "%llu.%u", iax->ctime_sec, iax->ctime_nsec);
pr(iax, CRTIME, "crtime", "%llu.%u", iax->crtime_sec, iax->crtime_nsec);
pr(iax, SIZE, "size", "%llu", iax->size);
prb(iax, RETENTION, "retention");
}
ret = 0;
@@ -107,6 +108,7 @@ static int parse_opt(int key, char *arg, struct argp_state *state)
struct attr_x_args *args = state->input;
struct timespec ts;
int ret;
u64 x;
switch (key) {
case 'm':
@@ -179,6 +181,16 @@ static int parse_opt(int key, char *arg, struct argp_state *state)
return ret;
}
break;
case 't':
args->iax.x_mask |= SCOUTFS_IOC_IAX_RETENTION;
if (arg) {
ret = parse_u64(arg, &x);
if (ret)
return ret;
if (x)
args->iax.bits |= SCOUTFS_IOC_IAX_B_RETENTION;
}
break;
case ARGP_KEY_ARG:
if (!args->filename)
args->filename = strdup_or_error(state, arg);
@@ -209,6 +221,7 @@ static struct argp_option set_options[] = {
{ "ctime", 'c', "SECS.NSECS", 0, "Inode change time (posix ctime)"},
{ "crtime", 'r', "SECS.NSECS", 0, "ScoutFS creation time"},
{ "size", 's', "SIZE", 0, "Inode i_size field"},
{ "retention", 't', "0|1", 0, "Retention flag"},
{ NULL }
};