#include <linux/stat.h>
#include <linux/smp_lock.h>
#include <linux/version.h>
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
-#include <asm/statfs.h>
-#endif
#define DEBUG_SUBSYSTEM S_LLITE
#include <linux/lustre_lite.h>
+#include "llite_internal.h"
static int ll_readlink_internal(struct inode *inode,
struct ptlrpc_request **request, char **symname)
{
struct ll_inode_info *lli = ll_i2info(inode);
struct ll_sb_info *sbi = ll_i2sbi(inode);
+ struct ll_fid fid;
+ struct mds_body *body;
int rc, symlen = inode->i_size + 1;
ENTRY;
RETURN(0);
}
- rc = mdc_getattr(&sbi->ll_mdc_conn, inode->i_ino, S_IFLNK,
- OBD_MD_LINKNAME, symlen, request);
+ ll_inode2fid(&fid, inode);
+ rc = md_getattr(sbi->ll_mdc_exp, &fid, OBD_MD_LINKNAME, symlen,
+ request);
if (rc) {
- CERROR("inode %lu: rc = %d\n", inode->i_ino, rc);
+ if (rc != -ENOENT)
+ CERROR("inode %lu: rc = %d\n", inode->i_ino, rc);
RETURN(rc);
}
- *symname = lustre_msg_buf((*request)->rq_repmsg, 1);
+ body = lustre_msg_buf ((*request)->rq_repmsg, 0, sizeof (*body));
+ LASSERT (body != NULL);
+ LASSERT_REPSWABBED (*request, 0);
+
+ if ((body->valid & OBD_MD_LINKNAME) == 0) {
+ CERROR ("OBD_MD_LINKNAME not set on reply\n");
+ GOTO (failed, rc = -EPROTO);
+ }
+
+ LASSERT (symlen != 0);
+ if (body->eadatasize != symlen) {
+ CERROR ("inode %lu: symlink length %d not expected %d\n",
+ inode->i_ino, body->eadatasize - 1, symlen - 1);
+ GOTO (failed, rc = -EPROTO);
+ }
+
+ *symname = lustre_msg_buf ((*request)->rq_repmsg, 1, symlen);
+ if (*symname == NULL ||
+ strnlen (*symname, symlen) != symlen - 1) {
+ /* not full/NULL terminated */
+ CERROR ("inode %lu: symlink not NULL terminated string"
+ "of length %d\n", inode->i_ino, symlen - 1);
+ GOTO (failed, rc = -EPROTO);
+ }
OBD_ALLOC(lli->lli_symlink_name, symlen);
/* do not return an error if we cannot cache the symlink locally */
memcpy(lli->lli_symlink_name, *symname, symlen);
RETURN(0);
+
+ failed:
+ ptlrpc_req_finished (*request);
+ RETURN (-EPROTO);
}
static int ll_readlink(struct dentry *dentry, char *buffer, int buflen)
GOTO(out, rc);
rc = vfs_readlink(dentry, buffer, buflen, symname);
+ ptlrpc_req_finished(request);
out:
up(&lli->lli_open_sem);
- ptlrpc_req_finished(request);
-
RETURN(rc);
}
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
-static int ll_follow_link(struct dentry *dentry, struct nameidata *nd,
- struct lookup_intent *it)
+static int ll_follow_link(struct dentry *dentry, struct nameidata *nd)
{
struct inode *inode = dentry->d_inode;
struct ll_inode_info *lli = ll_i2info(inode);
+ struct lookup_intent *it = ll_nd2it(nd);
struct ptlrpc_request *request;
- int op = 0, mode = 0, rc;
+ int rc;
char *symname;
ENTRY;
- CDEBUG(D_VFSTRACE, "VFS Op\n");
if (it != NULL) {
- op = it->it_op;
- mode = it->it_mode;
-
- ll_intent_release(dentry, it);
- }
-
- down(&lli->lli_open_sem);
- rc = ll_readlink_internal(inode, &request, &symname);
- up(&lli->lli_open_sem);
- if (rc)
- GOTO(out, rc);
+ int op = it->it_op;
+ int mode = it->it_create_mode;
- if (it != NULL) {
+ ll_intent_release(it);
it->it_op = op;
- it->it_mode = mode;
+ it->it_create_mode = mode;
}
- rc = vfs_follow_link_it(nd, symname, it);
- out:
- ptlrpc_req_finished(request);
-
- RETURN(rc);
-}
-#else
-static int ll_follow_link(struct dentry *dentry, struct nameidata *nd)
-{
- struct inode *inode = dentry->d_inode;
- struct ll_inode_info *lli = ll_i2info(inode);
- struct ptlrpc_request *request;
- int op = 0, mode = 0, rc;
- char *symname;
- ENTRY;
-
- op = nd->it.it_op;
- mode = nd->it.it_mode;
-
- ll_intent_release(dentry, &nd->it);
-
+ CDEBUG(D_VFSTRACE, "VFS Op\n");
down(&lli->lli_open_sem);
-
rc = ll_readlink_internal(inode, &request, &symname);
+ up(&lli->lli_open_sem);
if (rc)
GOTO(out, rc);
- nd->it.it_op = op;
- nd->it.it_mode = mode;
-
rc = vfs_follow_link(nd, symname);
- out:
- up(&lli->lli_open_sem);
ptlrpc_req_finished(request);
-
+ out:
RETURN(rc);
}
-#endif
-extern int ll_inode_revalidate(struct dentry *dentry);
-extern int ll_setattr(struct dentry *de, struct iattr *attr);
struct inode_operations ll_fast_symlink_inode_operations = {
- readlink: ll_readlink,
- setattr: ll_setattr,
- setattr_raw: ll_setattr_raw,
- follow_link2: ll_follow_link,
+ .readlink = ll_readlink,
+ .setattr = ll_setattr,
+ .setattr_raw = ll_setattr_raw,
+ .follow_link = ll_follow_link,
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
- revalidate: ll_inode_revalidate
+ .revalidate_it = ll_inode_revalidate_it
+#else
+ .getattr_it = ll_getattr
#endif
};