From 0a8aa1939777dd114479677f0044652c1fd72398 Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Wed, 5 Jun 2013 12:09:10 +1000 Subject: xfs: increase number of ACL entries for V5 superblocks The limit of 25 ACL entries is arbitrary, but baked into the on-disk format. For version 5 superblocks, increase it to the maximum nuber of ACLs that can fit into a single xattr. Signed-off-by: Dave Chinner Reviewed-by: Brian Foster Reviewed-by: Mark Tinguely Signed-off-by: Ben Myers (cherry picked from commit 5c87d4bc1a86bd6e6754ac3d6e111d776ddcfe57) --- fs/xfs/xfs_acl.c | 31 ++++++++++++++++++------------- 1 file changed, 18 insertions(+), 13 deletions(-) (limited to 'fs/xfs/xfs_acl.c') diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c index 1d32f1d52763..306d883d89bc 100644 --- a/fs/xfs/xfs_acl.c +++ b/fs/xfs/xfs_acl.c @@ -21,6 +21,8 @@ #include "xfs_bmap_btree.h" #include "xfs_inode.h" #include "xfs_vnodeops.h" +#include "xfs_sb.h" +#include "xfs_mount.h" #include "xfs_trace.h" #include #include @@ -34,7 +36,9 @@ */ STATIC struct posix_acl * -xfs_acl_from_disk(struct xfs_acl *aclp) +xfs_acl_from_disk( + struct xfs_acl *aclp, + int max_entries) { struct posix_acl_entry *acl_e; struct posix_acl *acl; @@ -42,7 +46,7 @@ xfs_acl_from_disk(struct xfs_acl *aclp) unsigned int count, i; count = be32_to_cpu(aclp->acl_cnt); - if (count > XFS_ACL_MAX_ENTRIES) + if (count > max_entries) return ERR_PTR(-EFSCORRUPTED); acl = posix_acl_alloc(count, GFP_KERNEL); @@ -108,9 +112,9 @@ xfs_get_acl(struct inode *inode, int type) struct xfs_inode *ip = XFS_I(inode); struct posix_acl *acl; struct xfs_acl *xfs_acl; - int len = sizeof(struct xfs_acl); unsigned char *ea_name; int error; + int len; acl = get_cached_acl(inode, type); if (acl != ACL_NOT_CACHED) @@ -133,8 +137,8 @@ xfs_get_acl(struct inode *inode, int type) * If we have a cached ACLs value just return it, not need to * go out to the disk. */ - - xfs_acl = kzalloc(sizeof(struct xfs_acl), GFP_KERNEL); + len = XFS_ACL_MAX_SIZE(ip->i_mount); + xfs_acl = kzalloc(len, GFP_KERNEL); if (!xfs_acl) return ERR_PTR(-ENOMEM); @@ -153,7 +157,7 @@ xfs_get_acl(struct inode *inode, int type) goto out; } - acl = xfs_acl_from_disk(xfs_acl); + acl = xfs_acl_from_disk(xfs_acl, XFS_ACL_MAX_ENTRIES(ip->i_mount)); if (IS_ERR(acl)) goto out; @@ -189,16 +193,17 @@ xfs_set_acl(struct inode *inode, int type, struct posix_acl *acl) if (acl) { struct xfs_acl *xfs_acl; - int len; + int len = XFS_ACL_MAX_SIZE(ip->i_mount); - xfs_acl = kzalloc(sizeof(struct xfs_acl), GFP_KERNEL); + xfs_acl = kzalloc(len, GFP_KERNEL); if (!xfs_acl) return -ENOMEM; xfs_acl_to_disk(xfs_acl, acl); - len = sizeof(struct xfs_acl) - - (sizeof(struct xfs_acl_entry) * - (XFS_ACL_MAX_ENTRIES - acl->a_count)); + + /* subtract away the unused acl entries */ + len -= sizeof(struct xfs_acl_entry) * + (XFS_ACL_MAX_ENTRIES(ip->i_mount) - acl->a_count); error = -xfs_attr_set(ip, ea_name, (unsigned char *)xfs_acl, len, ATTR_ROOT); @@ -243,7 +248,7 @@ xfs_set_mode(struct inode *inode, umode_t mode) static int xfs_acl_exists(struct inode *inode, unsigned char *name) { - int len = sizeof(struct xfs_acl); + int len = XFS_ACL_MAX_SIZE(XFS_M(inode->i_sb)); return (xfs_attr_get(XFS_I(inode), name, NULL, &len, ATTR_ROOT|ATTR_KERNOVAL) == 0); @@ -379,7 +384,7 @@ xfs_xattr_acl_set(struct dentry *dentry, const char *name, goto out_release; error = -EINVAL; - if (acl->a_count > XFS_ACL_MAX_ENTRIES) + if (acl->a_count > XFS_ACL_MAX_ENTRIES(XFS_M(inode->i_sb))) goto out_release; if (type == ACL_TYPE_ACCESS) { -- cgit v1.2.3