Page MenuHomeFreeBSD
Files F174749760

D60265.id188502.diff
No OneTemporary
Actions

D60265.id188502.diff
View Options

diff --git a/stand/libsa/zfs/zfsimpl.c b/stand/libsa/zfs/zfsimpl.c
--- a/stand/libsa/zfs/zfsimpl.c
+++ b/stand/libsa/zfs/zfsimpl.c
@@ -3829,6 +3829,69 @@
return (0);
}
+static int
+zfs_sa_lookup(struct zfsmount *mount, const void *buf, size_t buflen,
+ enum zfs_sa_attr_id attr, void *value, size_t *size)
+{
+ const sa_hdr_phys_t *hdr;
+ uint16_t layout[ZFS_SA_MAX_ATTRS];
+ char layout_name[16];
+ size_t hdrsize, length, offset;
+ unsigned int i, j, length_idx;
+ int error;
+
+ hdr = buf;
+ if (buflen < sizeof(*hdr) || hdr->sa_magic != SA_MAGIC)
+ return (EIO);
+ error = zfs_sa_load(mount);
+ if (error != 0)
+ return (error);
+
+ memset(layout, 0xff, sizeof(layout));
+ i = SA_HDR_LAYOUT_NUM(hdr);
+ if (i == 0)
+ i = 1;
+ snprintf(layout_name, sizeof(layout_name), "%u", i);
+ error = zap_lookup(mount->spa, &mount->sa_layouts, layout_name,
+ sizeof(layout[0]), nitems(layout), layout);
+ if (error != 0)
+ return (error);
+
+ hdrsize = SA_HDR_SIZE(hdr);
+ if (hdrsize < sizeof(*hdr) || hdrsize > buflen)
+ return (EIO);
+ offset = hdrsize;
+ length_idx = 0;
+ for (i = 0; i < nitems(layout) && layout[i] != UINT16_MAX; i++) {
+ for (j = 0; j < nitems(zfs_sa_attrs); j++) {
+ if (mount->sa_attrs[j] != UINT64_MAX &&
+ SA_ATTR_NUM(mount->sa_attrs[j]) == layout[i])
+ break;
+ }
+ if (j == nitems(zfs_sa_attrs))
+ return (EIO);
+ length = SA_ATTR_LENGTH(mount->sa_attrs[j]);
+ if (length == 0) {
+ if (offsetof(sa_hdr_phys_t, sa_lengths) +
+ (length_idx + 1) * sizeof(hdr->sa_lengths[0]) >
+ hdrsize)
+ return (EIO);
+ length = hdr->sa_lengths[length_idx++];
+ }
+ if (offset > buflen || length > buflen - offset)
+ return (EIO);
+ if (j == attr) {
+ if (*size < length)
+ return (EOVERFLOW);
+ memcpy(value, (const char *)buf + offset, length);
+ *size = length;
+ return (0);
+ }
+ offset = roundup2(offset + length, 8);
+ }
+ return (ENOENT);
+}
+
static int
zfs_dnode_stat(struct zfsmount *mount, dnode_phys_t *dn, struct stat *sb,
uint64_t fsid_guid, uint64_t objnum)

File Metadata

Mime Type
text/plain
Expires
Tue, Oct 6, 5:45 PM (9 h, 5 m)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
40152194
Default Alt Text
D60265.id188502.diff (2 KB)

Event Timeline