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Subject[PATCH 20/22] staging: lustre: llite: use xattr_handler name for ACLs
Date
From: "John L. Hammond" <john.hammond@intel.com>

If struct xattr_handler has a name member then use it (rather than
prefix) for the ACL xattrs. This avoids a bug where ACL operations
failed for some kernels.

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-10785
Reviewed-on: https://review.whamcloud.com/
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
---
drivers/staging/lustre/lustre/llite/xattr.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/xattr.c b/drivers/staging/lustre/lustre/llite/xattr.c
index d08bf1e..e835c8e 100644
--- a/drivers/staging/lustre/lustre/llite/xattr.c
+++ b/drivers/staging/lustre/lustre/llite/xattr.c
@@ -46,15 +46,16 @@

const struct xattr_handler *get_xattr_type(const char *name)
{
- int i = 0;
+ int i;

- while (ll_xattr_handlers[i]) {
- size_t len = strlen(ll_xattr_handlers[i]->prefix);
+ for (i = 0; ll_xattr_handlers[i]; i++) {
+ const char *prefix = xattr_prefix(ll_xattr_handlers[i]);
+ size_t prefix_len = strlen(prefix);

- if (!strncmp(ll_xattr_handlers[i]->prefix, name, len))
+ if (!strncmp(prefix, name, prefix_len))
return ll_xattr_handlers[i];
- i++;
}
+
return NULL;
}

@@ -627,14 +628,14 @@ ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size)
};

static const struct xattr_handler ll_acl_access_xattr_handler = {
- .prefix = XATTR_NAME_POSIX_ACL_ACCESS,
+ .name = XATTR_NAME_POSIX_ACL_ACCESS,
.flags = XATTR_ACL_ACCESS_T,
.get = ll_xattr_get_common,
.set = ll_xattr_set_common,
};

static const struct xattr_handler ll_acl_default_xattr_handler = {
- .prefix = XATTR_NAME_POSIX_ACL_DEFAULT,
+ .name = XATTR_NAME_POSIX_ACL_DEFAULT,
.flags = XATTR_ACL_DEFAULT_T,
.get = ll_xattr_get_common,
.set = ll_xattr_set_common,
--
1.8.3.1
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