*fcntl_count = 0;
*flock_count = 0;
- spin_lock(&inode->i_lock);
- for (lock = inode->i_flock; lock != NULL; lock = lock->fl_next) {
- if (lock->fl_flags & FL_POSIX)
- ++(*fcntl_count);
- }
-
ctx = inode->i_flctx;
if (ctx) {
+ spin_lock(&inode->i_lock);
+ list_for_each_entry(lock, &ctx->flc_posix, fl_list)
+ ++(*fcntl_count);
list_for_each_entry(lock, &ctx->flc_flock, fl_list)
++(*flock_count);
+ spin_unlock(&inode->i_lock);
}
- spin_unlock(&inode->i_lock);
dout("counted %d flock locks and %d fcntl locks",
*flock_count, *fcntl_count);
}
int num_fcntl_locks, int num_flock_locks)
{
struct file_lock *lock;
- struct file_lock_context *ctx;
+ struct file_lock_context *ctx = inode->i_flctx;
int err = 0;
int seen_fcntl = 0;
int seen_flock = 0;
dout("encoding %d flock and %d fcntl locks", num_flock_locks,
num_fcntl_locks);
+ if (!ctx)
+ return 0;
+
spin_lock(&inode->i_lock);
- for (lock = inode->i_flock; lock != NULL; lock = lock->fl_next) {
- if (lock->fl_flags & FL_POSIX) {
- ++seen_fcntl;
- if (seen_fcntl > num_fcntl_locks) {
- err = -ENOSPC;
- goto fail;
- }
- err = lock_to_ceph_filelock(lock, &flocks[l]);
- if (err)
- goto fail;
- ++l;
+ list_for_each_entry(lock, &ctx->flc_flock, fl_list) {
+ ++seen_fcntl;
+ if (seen_fcntl > num_fcntl_locks) {
+ err = -ENOSPC;
+ goto fail;
}
+ err = lock_to_ceph_filelock(lock, &flocks[l]);
+ if (err)
+ goto fail;
+ ++l;
}
-
- ctx = inode->i_flctx;
- if (ctx) {
- list_for_each_entry(lock, &ctx->flc_flock, fl_list) {
- ++seen_flock;
- if (seen_flock > num_flock_locks) {
- err = -ENOSPC;
- goto fail;
- }
- err = lock_to_ceph_filelock(lock, &flocks[l]);
- if (err)
- goto fail;
- ++l;
+ list_for_each_entry(lock, &ctx->flc_flock, fl_list) {
+ ++seen_flock;
+ if (seen_flock > num_flock_locks) {
+ err = -ENOSPC;
+ goto fail;
}
+ err = lock_to_ceph_filelock(lock, &flocks[l]);
+ if (err)
+ goto fail;
+ ++l;
}
fail:
spin_unlock(&inode->i_lock);
return rc;
}
-/* copied from fs/locks.c with a name change */
-#define cifs_for_each_lock(inode, lockp) \
- for (lockp = &inode->i_flock; *lockp != NULL; \
- lockp = &(*lockp)->fl_next)
-
struct lock_to_push {
struct list_head llist;
__u64 offset;
{
struct inode *inode = cfile->dentry->d_inode;
struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
- struct file_lock *flock, **before;
- unsigned int count = 0, i = 0;
+ struct file_lock *flock;
+ struct file_lock_context *flctx = inode->i_flctx;
+ unsigned int count = 0, i;
int rc = 0, xid, type;
struct list_head locks_to_send, *el;
struct lock_to_push *lck, *tmp;
xid = get_xid();
+ if (!flctx)
+ goto out;
+
spin_lock(&inode->i_lock);
- cifs_for_each_lock(inode, before) {
- if ((*before)->fl_flags & FL_POSIX)
- count++;
+ list_for_each(el, &flctx->flc_posix) {
+ count++;
}
spin_unlock(&inode->i_lock);
* added to the list while we are holding cinode->lock_sem that
* protects locking operations of this inode.
*/
- for (; i < count; i++) {
+ for (i = 0; i < count; i++) {
lck = kmalloc(sizeof(struct lock_to_push), GFP_KERNEL);
if (!lck) {
rc = -ENOMEM;
el = locks_to_send.next;
spin_lock(&inode->i_lock);
- cifs_for_each_lock(inode, before) {
- flock = *before;
- if ((flock->fl_flags & FL_POSIX) == 0)
- continue;
+ list_for_each_entry(flock, &flctx->flc_posix, fl_list) {
if (el == &locks_to_send) {
/*
* The list ended. We don't have enough allocated
lck->length = length;
lck->type = type;
lck->offset = flock->fl_start;
- el = el->next;
}
spin_unlock(&inode->i_lock);
{
struct inode *inode = nlmsvc_file_inode(file);
struct file_lock *fl;
+ struct file_lock_context *flctx = inode->i_flctx;
struct nlm_host *lockhost;
+ if (!flctx || list_empty_careful(&flctx->flc_posix))
+ return 0;
again:
file->f_locks = 0;
spin_lock(&inode->i_lock);
- for (fl = inode->i_flock; fl; fl = fl->fl_next) {
+ list_for_each_entry(fl, &flctx->flc_posix, fl_list) {
if (fl->fl_lmops != &nlmsvc_lock_operations)
continue;
{
struct inode *inode = nlmsvc_file_inode(file);
struct file_lock *fl;
+ struct file_lock_context *flctx = inode->i_flctx;
if (file->f_count || !list_empty(&file->f_blocks) || file->f_shares)
return 1;
- spin_lock(&inode->i_lock);
- for (fl = inode->i_flock; fl; fl = fl->fl_next) {
- if (fl->fl_lmops == &nlmsvc_lock_operations) {
- spin_unlock(&inode->i_lock);
- return 1;
+ if (flctx && !list_empty_careful(&flctx->flc_posix)) {
+ spin_lock(&inode->i_lock);
+ list_for_each_entry(fl, &flctx->flc_posix, fl_list) {
+ if (fl->fl_lmops == &nlmsvc_lock_operations) {
+ spin_unlock(&inode->i_lock);
+ return 1;
+ }
}
+ spin_unlock(&inode->i_lock);
}
- spin_unlock(&inode->i_lock);
file->f_locks = 0;
return 0;
}
int leases_enable = 1;
int lease_break_time = 45;
-#define for_each_lock(inode, lockp) \
- for (lockp = &inode->i_flock; *lockp != NULL; lockp = &(*lockp)->fl_next)
-
/*
* The global file_lock_list is only used for displaying /proc/locks, so we
* keep a list on each CPU, with each list protected by its own spinlock via
goto out;
INIT_LIST_HEAD(&new->flc_flock);
+ INIT_LIST_HEAD(&new->flc_posix);
/*
* Assign the pointer if it's not already assigned. If it is, then
{
if (ctx) {
WARN_ON_ONCE(!list_empty(&ctx->flc_flock));
+ WARN_ON_ONCE(!list_empty(&ctx->flc_posix));
kmem_cache_free(flctx_cache, ctx);
}
}
posix_test_lock(struct file *filp, struct file_lock *fl)
{
struct file_lock *cfl;
+ struct file_lock_context *ctx;
struct inode *inode = file_inode(filp);
+ ctx = inode->i_flctx;
+ if (!ctx || list_empty_careful(&ctx->flc_posix)) {
+ fl->fl_type = F_UNLCK;
+ return;
+ }
+
spin_lock(&inode->i_lock);
- for (cfl = file_inode(filp)->i_flock; cfl; cfl = cfl->fl_next) {
- if (!IS_POSIX(cfl))
- continue;
- if (posix_locks_conflict(fl, cfl))
- break;
+ list_for_each_entry(cfl, &ctx->flc_posix, fl_list) {
+ if (posix_locks_conflict(fl, cfl)) {
+ locks_copy_conflock(fl, cfl);
+ if (cfl->fl_nspid)
+ fl->fl_pid = pid_vnr(cfl->fl_nspid);
+ goto out;
+ }
}
- if (cfl) {
- locks_copy_conflock(fl, cfl);
- if (cfl->fl_nspid)
- fl->fl_pid = pid_vnr(cfl->fl_nspid);
- } else
- fl->fl_type = F_UNLCK;
+ fl->fl_type = F_UNLCK;
+out:
spin_unlock(&inode->i_lock);
return;
}
static int __posix_lock_file(struct inode *inode, struct file_lock *request, struct file_lock *conflock)
{
- struct file_lock *fl;
+ struct file_lock *fl, *tmp;
struct file_lock *new_fl = NULL;
struct file_lock *new_fl2 = NULL;
struct file_lock *left = NULL;
struct file_lock *right = NULL;
- struct file_lock **before;
+ struct file_lock_context *ctx;
int error;
bool added = false;
LIST_HEAD(dispose);
+ ctx = locks_get_lock_context(inode);
+ if (!ctx)
+ return -ENOMEM;
+
/*
* We may need two file_lock structures for this operation,
* so we get them in advance to avoid races.
* blocker's list of waiters and the global blocked_hash.
*/
if (request->fl_type != F_UNLCK) {
- for_each_lock(inode, before) {
- fl = *before;
+ list_for_each_entry(fl, &ctx->flc_posix, fl_list) {
if (!IS_POSIX(fl))
continue;
if (!posix_locks_conflict(request, fl))
if (request->fl_flags & FL_ACCESS)
goto out;
- /*
- * Find the first old lock with the same owner as the new lock.
- */
-
- before = &inode->i_flock;
-
- /* First skip locks owned by other processes. */
- while ((fl = *before) && (!IS_POSIX(fl) ||
- !posix_same_owner(request, fl))) {
- before = &fl->fl_next;
+ /* Find the first old lock with the same owner as the new lock */
+ list_for_each_entry(fl, &ctx->flc_posix, fl_list) {
+ if (posix_same_owner(request, fl))
+ break;
}
/* Process locks with this owner. */
- while ((fl = *before) && posix_same_owner(request, fl)) {
- /* Detect adjacent or overlapping regions (if same lock type)
- */
+ list_for_each_entry_safe_from(fl, tmp, &ctx->flc_posix, fl_list) {
+ if (!posix_same_owner(request, fl))
+ break;
+
+ /* Detect adjacent or overlapping regions (if same lock type) */
if (request->fl_type == fl->fl_type) {
/* In all comparisons of start vs end, use
* "start - 1" rather than "end + 1". If end
* is OFFSET_MAX, end + 1 will become negative.
*/
if (fl->fl_end < request->fl_start - 1)
- goto next_lock;
+ continue;
/* If the next lock in the list has entirely bigger
* addresses than the new one, insert the lock here.
*/
else
request->fl_end = fl->fl_end;
if (added) {
- locks_delete_lock(before, &dispose);
+ locks_delete_lock_ctx(fl, &dispose);
continue;
}
request = fl;
added = true;
- }
- else {
+ } else {
/* Processing for different lock types is a bit
* more complex.
*/
if (fl->fl_end < request->fl_start)
- goto next_lock;
+ continue;
if (fl->fl_start > request->fl_end)
break;
if (request->fl_type == F_UNLCK)
* one (This may happen several times).
*/
if (added) {
- locks_delete_lock(before, &dispose);
+ locks_delete_lock_ctx(fl, &dispose);
continue;
}
/*
locks_copy_lock(new_fl, request);
request = new_fl;
new_fl = NULL;
- locks_delete_lock(before, &dispose);
- locks_insert_lock(before, request);
+ locks_insert_lock_ctx(request, &fl->fl_list);
+ locks_delete_lock_ctx(fl, &dispose);
added = true;
}
}
- /* Go on to next lock.
- */
- next_lock:
- before = &fl->fl_next;
}
/*
goto out;
}
locks_copy_lock(new_fl, request);
- locks_insert_lock(before, new_fl);
+ locks_insert_lock_ctx(new_fl, &fl->fl_list);
new_fl = NULL;
}
if (right) {
left = new_fl2;
new_fl2 = NULL;
locks_copy_lock(left, right);
- locks_insert_lock(before, left);
+ locks_insert_lock_ctx(left, &fl->fl_list);
}
right->fl_start = request->fl_end + 1;
locks_wake_up_blocks(right);
*/
int locks_mandatory_locked(struct file *file)
{
+ int ret;
struct inode *inode = file_inode(file);
+ struct file_lock_context *ctx;
struct file_lock *fl;
+ ctx = inode->i_flctx;
+ if (!ctx || list_empty_careful(&ctx->flc_posix))
+ return 0;
+
/*
* Search the lock list for this inode for any POSIX locks.
*/
spin_lock(&inode->i_lock);
- for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
- if (!IS_POSIX(fl))
- continue;
+ ret = 0;
+ list_for_each_entry(fl, &ctx->flc_posix, fl_list) {
if (fl->fl_owner != current->files &&
- fl->fl_owner != file)
+ fl->fl_owner != file) {
+ ret = -EAGAIN;
break;
+ }
}
spin_unlock(&inode->i_lock);
- return fl ? -EAGAIN : 0;
+ return ret;
}
/**
void locks_remove_posix(struct file *filp, fl_owner_t owner)
{
struct file_lock lock;
+ struct file_lock_context *ctx = file_inode(filp)->i_flctx;
/*
* If there are no locks held on this file, we don't need to call
* posix_lock_file(). Another process could be setting a lock on this
* file at the same time, but we wouldn't remove that lock anyway.
*/
- if (!file_inode(filp)->i_flock)
+ if (!ctx || list_empty(&ctx->flc_posix))
return;
lock.fl_type = F_UNLCK;
{
struct inode *inode = state->inode;
struct file_lock *fl;
- struct file_lock_context *flctx;
+ struct file_lock_context *flctx = inode->i_flctx;
+ struct list_head *list;
int status = 0;
- if (inode->i_flock == NULL && inode->i_flctx == NULL)
+ if (flctx == NULL)
goto out;
- /* Protect inode->i_flock using the i_lock */
+ list = &flctx->flc_posix;
spin_lock(&inode->i_lock);
- for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
- if (!(fl->fl_flags & (FL_POSIX)))
- continue;
+restart:
+ list_for_each_entry(fl, list, fl_list) {
if (nfs_file_open_context(fl->fl_file) != ctx)
continue;
spin_unlock(&inode->i_lock);
goto out;
spin_lock(&inode->i_lock);
}
-
- flctx = inode->i_flctx;
- if (flctx) {
- list_for_each_entry(fl, &flctx->flc_flock, fl_list) {
- if (nfs_file_open_context(fl->fl_file) != ctx)
- continue;
- spin_unlock(&inode->i_lock);
- status = nfs4_lock_delegation_recall(fl, state,
- stateid);
- if (status < 0)
- goto out;
- spin_lock(&inode->i_lock);
- }
+ if (list == &flctx->flc_posix) {
+ list = &flctx->flc_flock;
+ goto restart;
}
spin_unlock(&inode->i_lock);
out:
struct file_lock *fl;
int status = 0;
struct file_lock_context *flctx = inode->i_flctx;
+ struct list_head *list;
- if (inode->i_flock == NULL && flctx == NULL)
+ if (flctx == NULL)
return 0;
+ list = &flctx->flc_posix;
+
/* Guard against delegation returns and new lock/unlock calls */
down_write(&nfsi->rwsem);
- /* Protect inode->i_flock using the BKL */
spin_lock(&inode->i_lock);
- for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
- if (!(fl->fl_flags & FL_POSIX))
- continue;
- if (nfs_file_open_context(fl->fl_file)->state != state)
- continue;
- spin_unlock(&inode->i_lock);
- status = ops->recover_lock(state, fl);
- switch (status) {
- case 0:
- break;
- case -ESTALE:
- case -NFS4ERR_ADMIN_REVOKED:
- case -NFS4ERR_STALE_STATEID:
- case -NFS4ERR_BAD_STATEID:
- case -NFS4ERR_EXPIRED:
- case -NFS4ERR_NO_GRACE:
- case -NFS4ERR_STALE_CLIENTID:
- case -NFS4ERR_BADSESSION:
- case -NFS4ERR_BADSLOT:
- case -NFS4ERR_BAD_HIGH_SLOT:
- case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
- goto out;
- default:
- printk(KERN_ERR "NFS: %s: unhandled error %d\n",
- __func__, status);
- case -ENOMEM:
- case -NFS4ERR_DENIED:
- case -NFS4ERR_RECLAIM_BAD:
- case -NFS4ERR_RECLAIM_CONFLICT:
- /* kill_proc(fl->fl_pid, SIGLOST, 1); */
- status = 0;
- }
- spin_lock(&inode->i_lock);
- }
-
- if (!flctx)
- goto out_unlock;
-
- list_for_each_entry(fl, &flctx->flc_flock, fl_list) {
+restart:
+ list_for_each_entry(fl, list, fl_list) {
if (nfs_file_open_context(fl->fl_file)->state != state)
continue;
spin_unlock(&inode->i_lock);
}
spin_lock(&inode->i_lock);
}
-out_unlock:
+ if (list == &flctx->flc_posix) {
+ list = &flctx->flc_flock;
+ goto restart;
+ }
spin_unlock(&inode->i_lock);
out:
up_write(&nfsi->rwsem);
if (prev) {
if (!nfs_match_open_context(req->wb_context, prev->wb_context))
return false;
- if (req->wb_context->dentry->d_inode->i_flock != NULL &&
- !nfs_match_lock_context(req->wb_lock_context,
- prev->wb_lock_context))
- return false;
flctx = req->wb_context->dentry->d_inode->i_flctx;
- if (flctx != NULL && !list_empty_careful(&flctx->flc_flock) &&
+ if (flctx != NULL &&
+ !(list_empty_careful(&flctx->flc_posix) &&
+ list_empty_careful(&flctx->flc_flock)) &&
!nfs_match_lock_context(req->wb_lock_context,
prev->wb_lock_context))
return false;
{
struct nfs_open_context *ctx = nfs_file_open_context(file);
struct nfs_lock_context *l_ctx;
+ struct file_lock_context *flctx = file_inode(file)->i_flctx;
struct nfs_page *req;
int do_flush, status;
/*
do_flush = req->wb_page != page || req->wb_context != ctx;
/* for now, flush if more than 1 request in page_group */
do_flush |= req->wb_this_page != req;
- if (l_ctx && ctx->dentry->d_inode->i_flock != NULL) {
- do_flush |= l_ctx->lockowner.l_owner != current->files
- || l_ctx->lockowner.l_pid != current->tgid;
- }
- if (l_ctx && ctx->dentry->d_inode->i_flctx &&
- !list_empty_careful(&ctx->dentry->d_inode->i_flctx->flc_flock)) {
+ if (l_ctx && flctx &&
+ !(list_empty_careful(&flctx->flc_posix) &&
+ list_empty_careful(&flctx->flc_flock))) {
do_flush |= l_ctx->lockowner.l_owner != current->files
|| l_ctx->lockowner.l_pid != current->tgid;
}
return 0;
if (NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE))
return 1;
- if (!inode->i_flock && !flctx)
+ if (!flctx || (list_empty_careful(&flctx->flc_flock) &&
+ list_empty_careful(&flctx->flc_posix)))
return 0;
/* Check to see if there are whole file write locks */
- spin_lock(&inode->i_lock);
ret = 0;
-
- fl = inode->i_flock;
- if (fl && is_whole_file_wrlock(fl)) {
- ret = 1;
- goto out;
- }
-
- if (!list_empty(&flctx->flc_flock)) {
+ spin_lock(&inode->i_lock);
+ if (!list_empty(&flctx->flc_posix)) {
+ fl = list_first_entry(&flctx->flc_posix, struct file_lock,
+ fl_list);
+ if (is_whole_file_wrlock(fl))
+ ret = 1;
+ } else if (!list_empty(&flctx->flc_flock)) {
fl = list_first_entry(&flctx->flc_flock, struct file_lock,
fl_list);
if (fl->fl_type == F_WRLCK)
ret = 1;
}
-out:
spin_unlock(&inode->i_lock);
return ret;
}
static bool
check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner)
{
- struct file_lock **flpp;
+ struct file_lock *fl;
int status = false;
struct file *filp = find_any_file(fp);
struct inode *inode;
+ struct file_lock_context *flctx;
if (!filp) {
/* Any valid lock stateid should have some sort of access */
}
inode = file_inode(filp);
+ flctx = inode->i_flctx;
- spin_lock(&inode->i_lock);
- for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
- if ((*flpp)->fl_owner == (fl_owner_t)lowner) {
- status = true;
- break;
+ if (flctx && !list_empty_careful(&flctx->flc_posix)) {
+ spin_lock(&inode->i_lock);
+ list_for_each_entry(fl, &flctx->flc_posix, fl_list) {
+ if (fl->fl_owner == (fl_owner_t)lowner) {
+ status = true;
+ break;
+ }
}
+ spin_unlock(&inode->i_lock);
}
- spin_unlock(&inode->i_lock);
fput(filp);
return status;
}
return retval;
}
- if (unlikely(inode->i_flock && mandatory_lock(inode))) {
+ if (unlikely(inode->i_flctx && mandatory_lock(inode))) {
retval = locks_mandatory_area(
read_write == READ ? FLOCK_VERIFY_READ : FLOCK_VERIFY_WRITE,
inode, file, pos, count);
struct file_lock_context {
struct list_head flc_flock;
+ struct list_head flc_posix;
};
/* The following constant reflects the upper bound of the file/locking space */
struct file *filp,
loff_t size)
{
- if (inode->i_flock && mandatory_lock(inode))
+ if (inode->i_flctx && mandatory_lock(inode))
return locks_mandatory_area(
FLOCK_VERIFY_WRITE, inode, filp,
size < inode->i_size ? size : inode->i_size,
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff