/* hash table for nfs4_file */
#define FILE_HASH_BITS 8
#define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
-#define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
+
/* hash table for (open)nfs4_stateid */
#define STATEID_HASH_BITS 10
#define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
static struct list_head client_lru;
static struct list_head close_lru;
-static void unhash_generic_stateid(struct nfs4_stateid *stp)
-{
- list_del(&stp->st_hash);
- list_del(&stp->st_perfile);
- list_del(&stp->st_perstateowner);
-}
-
-static void free_generic_stateid(struct nfs4_stateid *stp)
-{
- put_nfs4_file(stp->st_file);
- kmem_cache_free(stateid_slab, stp);
-}
-
-static void release_lock_stateid(struct nfs4_stateid *stp)
-{
- struct file *file;
-
- unhash_generic_stateid(stp);
- file = find_any_file(stp->st_file);
- if (file)
- locks_remove_posix(file, (fl_owner_t)stp->st_stateowner);
- free_generic_stateid(stp);
-}
-
-static void unhash_lockowner(struct nfs4_stateowner *sop)
-{
- struct nfs4_stateid *stp;
-
- list_del(&sop->so_idhash);
- list_del(&sop->so_strhash);
- list_del(&sop->so_perstateid);
- while (!list_empty(&sop->so_stateids)) {
- stp = list_first_entry(&sop->so_stateids,
- struct nfs4_stateid, st_perstateowner);
- release_lock_stateid(stp);
- }
-}
-
-static void release_lockowner(struct nfs4_stateowner *sop)
-{
- unhash_lockowner(sop);
- nfs4_put_stateowner(sop);
-}
-
-static void
-release_stateid_lockowners(struct nfs4_stateid *open_stp)
-{
- struct nfs4_stateowner *lock_sop;
-
- while (!list_empty(&open_stp->st_lockowners)) {
- lock_sop = list_entry(open_stp->st_lockowners.next,
- struct nfs4_stateowner, so_perstateid);
- /* list_del(&open_stp->st_lockowners); */
- BUG_ON(lock_sop->so_is_open_owner);
- release_lockowner(lock_sop);
- }
-}
-
/*
* We store the NONE, READ, WRITE, and BOTH bits separately in the
* st_{access,deny}_bmap field of the stateid, in order to track not
return nfs4_access_to_omode(access);
}
-static void release_open_stateid(struct nfs4_stateid *stp)
+static void unhash_generic_stateid(struct nfs4_stateid *stp)
{
- int oflag = nfs4_access_bmap_to_omode(stp);
+ list_del(&stp->st_hash);
+ list_del(&stp->st_perfile);
+ list_del(&stp->st_perstateowner);
+}
+
+static void free_generic_stateid(struct nfs4_stateid *stp)
+{
+ int oflag;
+
+ if (stp->st_access_bmap) {
+ oflag = nfs4_access_bmap_to_omode(stp);
+ nfs4_file_put_access(stp->st_file, oflag);
+ put_nfs4_file(stp->st_file);
+ }
+ kmem_cache_free(stateid_slab, stp);
+}
+
+static void release_lock_stateid(struct nfs4_stateid *stp)
+{
+ struct file *file;
+ unhash_generic_stateid(stp);
+ file = find_any_file(stp->st_file);
+ if (file)
+ locks_remove_posix(file, (fl_owner_t)stp->st_stateowner);
+ free_generic_stateid(stp);
+}
+
+static void unhash_lockowner(struct nfs4_stateowner *sop)
+{
+ struct nfs4_stateid *stp;
+
+ list_del(&sop->so_idhash);
+ list_del(&sop->so_strhash);
+ list_del(&sop->so_perstateid);
+ while (!list_empty(&sop->so_stateids)) {
+ stp = list_first_entry(&sop->so_stateids,
+ struct nfs4_stateid, st_perstateowner);
+ release_lock_stateid(stp);
+ }
+}
+
+static void release_lockowner(struct nfs4_stateowner *sop)
+{
+ unhash_lockowner(sop);
+ nfs4_put_stateowner(sop);
+}
+
+static void
+release_stateid_lockowners(struct nfs4_stateid *open_stp)
+{
+ struct nfs4_stateowner *lock_sop;
+
+ while (!list_empty(&open_stp->st_lockowners)) {
+ lock_sop = list_entry(open_stp->st_lockowners.next,
+ struct nfs4_stateowner, so_perstateid);
+ /* list_del(&open_stp->st_lockowners); */
+ BUG_ON(lock_sop->so_is_open_owner);
+ release_lockowner(lock_sop);
+ }
+}
+
+static void release_open_stateid(struct nfs4_stateid *stp)
+{
unhash_generic_stateid(stp);
release_stateid_lockowners(stp);
- nfs4_file_put_access(stp->st_file, oflag);
free_generic_stateid(stp);
}
u32 maxrpc = nfsd_serv->sv_max_mesg;
new->maxreqs = numslots;
- new->maxresp_cached = slotsize + NFSD_MIN_HDR_SEQ_SZ;
+ new->maxresp_cached = min_t(u32, req->maxresp_cached,
+ slotsize + NFSD_MIN_HDR_SEQ_SZ);
new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc);
new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc);
new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND);
if (ONE_STATEID(stateid) && (flags & RD_STATE))
return nfs_ok;
else if (locks_in_grace()) {
- /* Answer in remaining cases depends on existance of
+ /* Answer in remaining cases depends on existence of
* conflicting state; so we must wait out the grace period. */
return nfserr_grace;
} else if (flags & WR_STATE)
/*
* Alloc a lock owner structure.
* Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
- * occured.
+ * occurred.
*
* strhashval = lock_ownerstr_hashval
*/
stp->st_stateid.si_stateownerid = sop->so_id;
stp->st_stateid.si_fileid = fp->fi_id;
stp->st_stateid.si_generation = 0;
+ stp->st_access_bmap = 0;
stp->st_deny_bmap = open_stp->st_deny_bmap;
stp->st_openstp = open_stp;
LOFF_OVERFLOW(offset, length)));
}
+static void get_lock_access(struct nfs4_stateid *lock_stp, u32 access)
+{
+ struct nfs4_file *fp = lock_stp->st_file;
+ int oflag = nfs4_access_to_omode(access);
+
+ if (test_bit(access, &lock_stp->st_access_bmap))
+ return;
+ nfs4_file_get_access(fp, oflag);
+ __set_bit(access, &lock_stp->st_access_bmap);
+}
+
/*
* LOCK operation
*/
struct file_lock conflock;
__be32 status = 0;
unsigned int strhashval;
- unsigned int cmd;
int err;
dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
switch (lock->lk_type) {
case NFS4_READ_LT:
case NFS4_READW_LT:
- if (find_readable_file(lock_stp->st_file)) {
- nfs4_get_vfs_file(rqstp, fp, &cstate->current_fh, NFS4_SHARE_ACCESS_READ);
- filp = find_readable_file(lock_stp->st_file);
- }
+ filp = find_readable_file(lock_stp->st_file);
+ if (filp)
+ get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ);
file_lock.fl_type = F_RDLCK;
- cmd = F_SETLK;
- break;
+ break;
case NFS4_WRITE_LT:
case NFS4_WRITEW_LT:
- if (find_writeable_file(lock_stp->st_file)) {
- nfs4_get_vfs_file(rqstp, fp, &cstate->current_fh, NFS4_SHARE_ACCESS_WRITE);
- filp = find_writeable_file(lock_stp->st_file);
- }
+ filp = find_writeable_file(lock_stp->st_file);
+ if (filp)
+ get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE);
file_lock.fl_type = F_WRLCK;
- cmd = F_SETLK;
- break;
+ break;
default:
status = nfserr_inval;
goto out;
* Note: locks.c uses the BKL to protect the inode's lock list.
*/
- err = vfs_lock_file(filp, cmd, &file_lock, &conflock);
+ err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock);
switch (-err) {
case 0: /* success! */
update_stateid(&lock_stp->st_stateid);
git.openpandora.org / pandora-kernel.git / blobdiff