*/
STATIC int xfs_attr_node_get(xfs_da_args_t *args);
STATIC void xfs_attr_restore_rmt_blk(struct xfs_da_args *args);
-STATIC int xfs_attr_node_addname(struct xfs_attr_item *attr);
+static int xfs_attr_node_try_addname(struct xfs_attr_item *attr);
STATIC int xfs_attr_node_addname_find_attr(struct xfs_attr_item *attr);
STATIC int xfs_attr_node_addname_clear_incomplete(struct xfs_attr_item *attr);
STATIC int xfs_attr_node_hasname(xfs_da_args_t *args,
}
}
+/*
+ * Add an attr to a shortform fork. If there is no space,
+ * xfs_attr_shortform_addname() will convert to leaf format and return -ENOSPC.
+ * to use.
+ */
STATIC int
xfs_attr_try_sf_addname(
struct xfs_inode *dp,
return error;
}
-/*
- * Check to see if the attr should be upgraded from non-existent or shortform to
- * single-leaf-block attribute list.
- */
-static inline bool
-xfs_attr_is_shortform(
- struct xfs_inode *ip)
-{
- return ip->i_afp->if_format == XFS_DINODE_FMT_LOCAL ||
- (ip->i_afp->if_format == XFS_DINODE_FMT_EXTENTS &&
- ip->i_afp->if_nextents == 0);
-}
-
-STATIC int
+static int
xfs_attr_sf_addname(
struct xfs_attr_item *attr)
{
struct xfs_inode *dp = args->dp;
int error = 0;
- /*
- * Try to add the attr to the attribute list in the inode.
- */
error = xfs_attr_try_sf_addname(dp, args);
-
- /* Should only be 0, -EEXIST or -ENOSPC */
- if (error != -ENOSPC)
- return error;
+ if (error != -ENOSPC) {
+ ASSERT(!error || error == -EEXIST);
+ attr->xattri_dela_state = XFS_DAS_DONE;
+ goto out;
+ }
/*
* It won't fit in the shortform, transform to a leaf block. GROT:
* with the write verifier.
*/
xfs_trans_bhold(args->trans, attr->xattri_leaf_bp);
-
- /*
- * We're still in XFS_DAS_UNINIT state here. We've converted
- * the attr fork to leaf format and will restart with the leaf
- * add.
- */
- trace_xfs_attr_sf_addname_return(XFS_DAS_UNINIT, args->dp);
- return -EAGAIN;
+ attr->xattri_dela_state = XFS_DAS_LEAF_ADD;
+ error = -EAGAIN;
+out:
+ trace_xfs_attr_sf_addname_return(attr->xattri_dela_state, args->dp);
+ return error;
}
-STATIC int
+static int
xfs_attr_leaf_addname(
struct xfs_attr_item *attr)
{
struct xfs_da_args *args = attr->xattri_da_args;
- struct xfs_inode *dp = args->dp;
- enum xfs_delattr_state next_state = XFS_DAS_UNINIT;
int error;
- if (xfs_attr_is_leaf(dp)) {
-
- /*
- * Use the leaf buffer we may already hold locked as a result of
- * a sf-to-leaf conversion. The held buffer is no longer valid
- * after this call, regardless of the result.
- */
- error = xfs_attr_leaf_try_add(args, attr->xattri_leaf_bp);
- attr->xattri_leaf_bp = NULL;
+ ASSERT(xfs_attr_is_leaf(args->dp));
- if (error == -ENOSPC) {
- error = xfs_attr3_leaf_to_node(args);
- if (error)
- return error;
-
- /*
- * Finish any deferred work items and roll the
- * transaction once more. The goal here is to call
- * node_addname with the inode and transaction in the
- * same state (inode locked and joined, transaction
- * clean) no matter how we got to this step.
- *
- * At this point, we are still in XFS_DAS_UNINIT, but
- * when we come back, we'll be a node, so we'll fall
- * down into the node handling code below
- */
- error = -EAGAIN;
- goto out;
- }
- next_state = XFS_DAS_FOUND_LBLK;
- } else {
- ASSERT(!attr->xattri_leaf_bp);
+ /*
+ * Use the leaf buffer we may already hold locked as a result of
+ * a sf-to-leaf conversion. The held buffer is no longer valid
+ * after this call, regardless of the result.
+ */
+ error = xfs_attr_leaf_try_add(args, attr->xattri_leaf_bp);
+ attr->xattri_leaf_bp = NULL;
- error = xfs_attr_node_addname_find_attr(attr);
+ if (error == -ENOSPC) {
+ error = xfs_attr3_leaf_to_node(args);
if (error)
return error;
- next_state = XFS_DAS_FOUND_NBLK;
- error = xfs_attr_node_addname(attr);
+ /*
+ * We're not in leaf format anymore, so roll the transaction and
+ * retry the add to the newly allocated node block.
+ */
+ attr->xattri_dela_state = XFS_DAS_NODE_ADD;
+ error = -EAGAIN;
+ goto out;
}
if (error)
return error;
*/
if (args->rmtblkno ||
(args->op_flags & XFS_DA_OP_RENAME)) {
- attr->xattri_dela_state = next_state;
+ attr->xattri_dela_state = XFS_DAS_FOUND_LBLK;
error = -EAGAIN;
+ } else {
+ attr->xattri_dela_state = XFS_DAS_DONE;
}
-
out:
trace_xfs_attr_leaf_addname_return(attr->xattri_dela_state, args->dp);
return error;
}
+static int
+xfs_attr_node_addname(
+ struct xfs_attr_item *attr)
+{
+ struct xfs_da_args *args = attr->xattri_da_args;
+ int error;
+
+ ASSERT(!attr->xattri_leaf_bp);
+
+ error = xfs_attr_node_addname_find_attr(attr);
+ if (error)
+ return error;
+
+ error = xfs_attr_node_try_addname(attr);
+ if (error)
+ return error;
+
+ if (args->rmtblkno ||
+ (args->op_flags & XFS_DA_OP_RENAME)) {
+ attr->xattri_dela_state = XFS_DAS_FOUND_NBLK;
+ error = -EAGAIN;
+ } else {
+ attr->xattri_dela_state = XFS_DAS_DONE;
+ }
+
+ trace_xfs_attr_node_addname_return(attr->xattri_dela_state, args->dp);
+ return error;
+}
+
+
/*
* Set the attribute specified in @args.
* This routine is meant to function as a delayed operation, and may return
/* State machine switch */
switch (attr->xattri_dela_state) {
case XFS_DAS_UNINIT:
- /*
- * If the fork is shortform, attempt to add the attr. If there
- * is no space, this converts to leaf format and returns
- * -EAGAIN with the leaf buffer held across the roll. The caller
- * will deal with a transaction roll error, but otherwise
- * release the hold once we return with a clean transaction.
- */
- if (xfs_attr_is_shortform(dp))
- return xfs_attr_sf_addname(attr);
+ ASSERT(0);
+ return -EFSCORRUPTED;
+ case XFS_DAS_SF_ADD:
+ return xfs_attr_sf_addname(attr);
+ case XFS_DAS_LEAF_ADD:
return xfs_attr_leaf_addname(attr);
+ case XFS_DAS_NODE_ADD:
+ return xfs_attr_node_addname(attr);
case XFS_DAS_FOUND_LBLK:
/*
if (error)
return error;
- new->xattri_dela_state = XFS_DAS_UNINIT;
+ new->xattri_dela_state = xfs_attr_init_add_state(args);
xfs_defer_add(args->trans, XFS_DEFER_OPS_TYPE_ATTR, &new->xattri_list);
trace_xfs_attr_defer_add(new->xattri_dela_state, args->dp);
if (error)
return error;
- new->xattri_dela_state = XFS_DAS_UNINIT;
+ new->xattri_dela_state = xfs_attr_init_replace_state(args);
xfs_defer_add(args->trans, XFS_DEFER_OPS_TYPE_ATTR, &new->xattri_list);
trace_xfs_attr_defer_replace(new->xattri_dela_state, args->dp);
* to handle this, and recall the function until a successful error code is
*returned.
*/
-STATIC int
-xfs_attr_node_addname(
+static int
+xfs_attr_node_try_addname(
struct xfs_attr_item *attr)
{
struct xfs_da_args *args = attr->xattri_da_args;
* to where it was and resume executing where it left off.
*/
enum xfs_delattr_state {
- XFS_DAS_UNINIT = 0, /* No state has been set yet */
- XFS_DAS_RMTBLK, /* Removing remote blks */
- XFS_DAS_RM_NAME, /* Remove attr name */
- XFS_DAS_RM_SHRINK, /* We are shrinking the tree */
- XFS_DAS_FOUND_LBLK, /* We found leaf blk for attr */
- XFS_DAS_FOUND_NBLK, /* We found node blk for attr */
- XFS_DAS_FLIP_LFLAG, /* Flipped leaf INCOMPLETE attr flag */
- XFS_DAS_RM_LBLK, /* A rename is removing leaf blocks */
- XFS_DAS_RD_LEAF, /* Read in the new leaf */
- XFS_DAS_ALLOC_NODE, /* We are allocating node blocks */
- XFS_DAS_FLIP_NFLAG, /* Flipped node INCOMPLETE attr flag */
- XFS_DAS_RM_NBLK, /* A rename is removing node blocks */
- XFS_DAS_CLR_FLAG, /* Clear incomplete flag */
+ XFS_DAS_UNINIT = 0, /* No state has been set yet */
+ XFS_DAS_SF_ADD, /* Initial shortform set iter state */
+ XFS_DAS_LEAF_ADD, /* Initial leaf form set iter state */
+ XFS_DAS_NODE_ADD, /* Initial node form set iter state */
+ XFS_DAS_RMTBLK, /* Removing remote blks */
+ XFS_DAS_RM_NAME, /* Remove attr name */
+ XFS_DAS_RM_SHRINK, /* We are shrinking the tree */
+ XFS_DAS_FOUND_LBLK, /* We found leaf blk for attr */
+ XFS_DAS_FOUND_NBLK, /* We found node blk for attr */
+ XFS_DAS_FLIP_LFLAG, /* Flipped leaf INCOMPLETE attr flag */
+ XFS_DAS_RM_LBLK, /* A rename is removing leaf blocks */
+ XFS_DAS_RD_LEAF, /* Read in the new leaf */
+ XFS_DAS_ALLOC_NODE, /* We are allocating node blocks */
+ XFS_DAS_FLIP_NFLAG, /* Flipped node INCOMPLETE attr flag */
+ XFS_DAS_RM_NBLK, /* A rename is removing node blocks */
+ XFS_DAS_CLR_FLAG, /* Clear incomplete flag */
+ XFS_DAS_DONE, /* finished operation */
};
+#define XFS_DAS_STRINGS \
+ { XFS_DAS_UNINIT, "XFS_DAS_UNINIT" }, \
+ { XFS_DAS_SF_ADD, "XFS_DAS_SF_ADD" }, \
+ { XFS_DAS_LEAF_ADD, "XFS_DAS_LEAF_ADD" }, \
+ { XFS_DAS_NODE_ADD, "XFS_DAS_NODE_ADD" }, \
+ { XFS_DAS_RMTBLK, "XFS_DAS_RMTBLK" }, \
+ { XFS_DAS_RM_NAME, "XFS_DAS_RM_NAME" }, \
+ { XFS_DAS_RM_SHRINK, "XFS_DAS_RM_SHRINK" }, \
+ { XFS_DAS_FOUND_LBLK, "XFS_DAS_FOUND_LBLK" }, \
+ { XFS_DAS_FOUND_NBLK, "XFS_DAS_FOUND_NBLK" }, \
+ { XFS_DAS_FLIP_LFLAG, "XFS_DAS_FLIP_LFLAG" }, \
+ { XFS_DAS_RM_LBLK, "XFS_DAS_RM_LBLK" }, \
+ { XFS_DAS_RD_LEAF, "XFS_DAS_RD_LEAF" }, \
+ { XFS_DAS_ALLOC_NODE, "XFS_DAS_ALLOC_NODE" }, \
+ { XFS_DAS_FLIP_NFLAG, "XFS_DAS_FLIP_NFLAG" }, \
+ { XFS_DAS_RM_NBLK, "XFS_DAS_RM_NBLK" }, \
+ { XFS_DAS_CLR_FLAG, "XFS_DAS_CLR_FLAG" }, \
+ { XFS_DAS_DONE, "XFS_DAS_DONE" }
+
/*
* Defines for xfs_attr_item.xattri_flags
*/
int __init xfs_attrd_init_cache(void);
void xfs_attrd_destroy_cache(void);
+/*
+ * Check to see if the attr should be upgraded from non-existent or shortform to
+ * single-leaf-block attribute list.
+ */
+static inline bool
+xfs_attr_is_shortform(
+ struct xfs_inode *ip)
+{
+ return ip->i_afp->if_format == XFS_DINODE_FMT_LOCAL ||
+ (ip->i_afp->if_format == XFS_DINODE_FMT_EXTENTS &&
+ ip->i_afp->if_nextents == 0);
+}
+
+static inline enum xfs_delattr_state
+xfs_attr_init_add_state(struct xfs_da_args *args)
+{
+
+ /*
+ * When called from the completion of a attr remove to determine the
+ * next state, the attribute fork may be null. This can occur only occur
+ * on a pure remove, but we grab the next state before we check if a
+ * replace operation is being performed. If we are called from any other
+ * context, i_afp is guaranteed to exist. Hence if the attr fork is
+ * null, we were called from a pure remove operation and so we are done.
+ */
+ if (!args->dp->i_afp)
+ return XFS_DAS_DONE;
+ if (xfs_attr_is_shortform(args->dp))
+ return XFS_DAS_SF_ADD;
+ if (xfs_attr_is_leaf(args->dp))
+ return XFS_DAS_LEAF_ADD;
+ return XFS_DAS_NODE_ADD;
+}
+
+static inline enum xfs_delattr_state
+xfs_attr_init_replace_state(struct xfs_da_args *args)
+{
+ return xfs_attr_init_add_state(args);
+}
+
#endif /* __XFS_ATTR_H__ */
#include "xfs_bmap.h"
#include "xfs_alloc.h"
#include "xfs_buf.h"
+#include "xfs_da_format.h"
+#include "xfs_da_btree.h"
#include "xfs_attr.h"
static struct kmem_cache *xfs_defer_pending_cache;
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
+#include "xfs_da_format.h"
+#include "xfs_da_btree.h"
#include "xfs_attr.h"
#include "xfs_trace.h"
#include "xfs_error.h"
#include "xfs_acl.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
#include "xfs_trans.h"
#include <linux/posix_acl_xattr.h>
args->hashval = xfs_da_hashname(args->name, args->namelen);
args->attr_filter = attrp->alfi_attr_flags;
- if (attrp->alfi_op_flags == XFS_ATTR_OP_FLAGS_SET) {
+ switch (attrp->alfi_op_flags & XFS_ATTR_OP_FLAGS_TYPE_MASK) {
+ case XFS_ATTR_OP_FLAGS_SET:
+ case XFS_ATTR_OP_FLAGS_REPLACE:
args->value = attrip->attri_value;
args->valuelen = attrp->alfi_value_len;
args->total = xfs_attr_calc_size(args, &local);
+ attr->xattri_dela_state = xfs_attr_init_add_state(args);
+ break;
+ case XFS_ATTR_OP_FLAGS_REMOVE:
+ attr->xattri_dela_state = XFS_DAS_UNINIT;
+ break;
+ default:
+ ASSERT(0);
+ error = -EFSCORRUPTED;
+ goto out;
}
xfs_init_attr_trans(args, &tres, &total);
#include "xfs_iwalk.h"
#include "xfs_itable.h"
#include "xfs_error.h"
+#include "xfs_da_format.h"
+#include "xfs_da_btree.h"
#include "xfs_attr.h"
#include "xfs_bmap.h"
#include "xfs_bmap_util.h"
#include "xfs_health.h"
#include "xfs_reflink.h"
#include "xfs_ioctl.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
#include <linux/mount.h>
#include <linux/namei.h>
DEFINE_ICLOG_EVENT(xlog_iclog_wait_on);
DEFINE_ICLOG_EVENT(xlog_iclog_write);
+TRACE_DEFINE_ENUM(XFS_DAS_UNINIT);
+TRACE_DEFINE_ENUM(XFS_DAS_SF_ADD);
+TRACE_DEFINE_ENUM(XFS_DAS_LEAF_ADD);
+TRACE_DEFINE_ENUM(XFS_DAS_NODE_ADD);
+TRACE_DEFINE_ENUM(XFS_DAS_RMTBLK);
+TRACE_DEFINE_ENUM(XFS_DAS_RM_NAME);
+TRACE_DEFINE_ENUM(XFS_DAS_RM_SHRINK);
+TRACE_DEFINE_ENUM(XFS_DAS_FOUND_LBLK);
+TRACE_DEFINE_ENUM(XFS_DAS_FOUND_NBLK);
+TRACE_DEFINE_ENUM(XFS_DAS_FLIP_LFLAG);
+TRACE_DEFINE_ENUM(XFS_DAS_RM_LBLK);
+TRACE_DEFINE_ENUM(XFS_DAS_RD_LEAF);
+TRACE_DEFINE_ENUM(XFS_DAS_ALLOC_NODE);
+TRACE_DEFINE_ENUM(XFS_DAS_FLIP_NFLAG);
+TRACE_DEFINE_ENUM(XFS_DAS_RM_NBLK);
+TRACE_DEFINE_ENUM(XFS_DAS_CLR_FLAG);
+
DECLARE_EVENT_CLASS(xfs_das_state_class,
TP_PROTO(int das, struct xfs_inode *ip),
TP_ARGS(das, ip),
__entry->das = das;
__entry->ino = ip->i_ino;
),
- TP_printk("state change %d ino 0x%llx",
- __entry->das, __entry->ino)
+ TP_printk("state change %s ino 0x%llx",
+ __print_symbolic(__entry->das, XFS_DAS_STRINGS),
+ __entry->ino)
)
#define DEFINE_DAS_STATE_EVENT(name) \
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
+#include "xfs_da_btree.h"
#include "xfs_attr.h"
#include "xfs_acl.h"
-#include "xfs_da_btree.h"
#include <linux/posix_acl_xattr.h>
projects / linux.git / commitdiff