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-rw-r--r--fs/afs/inode.c11
-rw-r--r--fs/backing-file.c5
-rw-r--r--fs/ceph/inode.c1
-rw-r--r--fs/netfs/io.c1
-rw-r--r--fs/netfs/misc.c60
-rw-r--r--fs/netfs/write_collect.c7
-rw-r--r--fs/overlayfs/params.c51
-rw-r--r--fs/romfs/super.c2
-rw-r--r--kernel/fork.c25
-rw-r--r--mm/truncate.c4
10 files changed, 84 insertions, 83 deletions
diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index 3acf5e050072..a95e77670b49 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -695,13 +695,18 @@ static void afs_setattr_edit_file(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_vnode *vnode = vp->vnode;
+ struct inode *inode = &vnode->netfs.inode;
if (op->setattr.attr->ia_valid & ATTR_SIZE) {
loff_t size = op->setattr.attr->ia_size;
- loff_t i_size = op->setattr.old_i_size;
+ loff_t old = op->setattr.old_i_size;
+
+ /* Note: inode->i_size was updated by afs_apply_status() inside
+ * the I/O and callback locks.
+ */
- if (size != i_size) {
- truncate_setsize(&vnode->netfs.inode, size);
+ if (size != old) {
+ truncate_pagecache(inode, size);
netfs_resize_file(&vnode->netfs, size, true);
fscache_resize_cookie(afs_vnode_cache(vnode), size);
}
diff --git a/fs/backing-file.c b/fs/backing-file.c
index afb557446c27..8860dac58c37 100644
--- a/fs/backing-file.c
+++ b/fs/backing-file.c
@@ -303,13 +303,16 @@ ssize_t backing_file_splice_write(struct pipe_inode_info *pipe,
if (WARN_ON_ONCE(!(out->f_mode & FMODE_BACKING)))
return -EIO;
+ if (!out->f_op->splice_write)
+ return -EINVAL;
+
ret = file_remove_privs(ctx->user_file);
if (ret)
return ret;
old_cred = override_creds(ctx->cred);
file_start_write(out);
- ret = iter_file_splice_write(pipe, out, ppos, len, flags);
+ ret = out->f_op->splice_write(pipe, out, ppos, len, flags);
file_end_write(out);
revert_creds(old_cred);
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 71cd70514efa..4a8eec46254b 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -695,6 +695,7 @@ void ceph_evict_inode(struct inode *inode)
percpu_counter_dec(&mdsc->metric.total_inodes);
+ netfs_wait_for_outstanding_io(inode);
truncate_inode_pages_final(&inode->i_data);
if (inode->i_state & I_PINNING_NETFS_WB)
ceph_fscache_unuse_cookie(inode, true);
diff --git a/fs/netfs/io.c b/fs/netfs/io.c
index 5367caf3fa28..4da0a494e860 100644
--- a/fs/netfs/io.c
+++ b/fs/netfs/io.c
@@ -313,6 +313,7 @@ static bool netfs_rreq_perform_resubmissions(struct netfs_io_request *rreq)
netfs_reset_subreq_iter(rreq, subreq);
netfs_read_from_server(rreq, subreq);
} else if (test_bit(NETFS_SREQ_SHORT_IO, &subreq->flags)) {
+ netfs_reset_subreq_iter(rreq, subreq);
netfs_rreq_short_read(rreq, subreq);
}
}
diff --git a/fs/netfs/misc.c b/fs/netfs/misc.c
index 83e644bd518f..c1f321cf5999 100644
--- a/fs/netfs/misc.c
+++ b/fs/netfs/misc.c
@@ -97,10 +97,22 @@ EXPORT_SYMBOL(netfs_clear_inode_writeback);
void netfs_invalidate_folio(struct folio *folio, size_t offset, size_t length)
{
struct netfs_folio *finfo;
+ struct netfs_inode *ctx = netfs_inode(folio_inode(folio));
size_t flen = folio_size(folio);
_enter("{%lx},%zx,%zx", folio->index, offset, length);
+ if (offset == 0 && length == flen) {
+ unsigned long long i_size = i_size_read(&ctx->inode);
+ unsigned long long fpos = folio_pos(folio), end;
+
+ end = umin(fpos + flen, i_size);
+ if (fpos < i_size && end > ctx->zero_point)
+ ctx->zero_point = end;
+ }
+
+ folio_wait_private_2(folio); /* [DEPRECATED] */
+
if (!folio_test_private(folio))
return;
@@ -113,18 +125,34 @@ void netfs_invalidate_folio(struct folio *folio, size_t offset, size_t length)
/* We have a partially uptodate page from a streaming write. */
unsigned int fstart = finfo->dirty_offset;
unsigned int fend = fstart + finfo->dirty_len;
- unsigned int end = offset + length;
+ unsigned int iend = offset + length;
if (offset >= fend)
return;
- if (end <= fstart)
+ if (iend <= fstart)
+ return;
+
+ /* The invalidation region overlaps the data. If the region
+ * covers the start of the data, we either move along the start
+ * or just erase the data entirely.
+ */
+ if (offset <= fstart) {
+ if (iend >= fend)
+ goto erase_completely;
+ /* Move the start of the data. */
+ finfo->dirty_len = fend - iend;
+ finfo->dirty_offset = offset;
+ return;
+ }
+
+ /* Reduce the length of the data if the invalidation region
+ * covers the tail part.
+ */
+ if (iend >= fend) {
+ finfo->dirty_len = offset - fstart;
return;
- if (offset <= fstart && end >= fend)
- goto erase_completely;
- if (offset <= fstart && end > fstart)
- goto reduce_len;
- if (offset > fstart && end >= fend)
- goto move_start;
+ }
+
/* A partial write was split. The caller has already zeroed
* it, so just absorb the hole.
*/
@@ -137,12 +165,6 @@ erase_completely:
folio_clear_uptodate(folio);
kfree(finfo);
return;
-reduce_len:
- finfo->dirty_len = offset + length - finfo->dirty_offset;
- return;
-move_start:
- finfo->dirty_len -= offset - finfo->dirty_offset;
- finfo->dirty_offset = offset;
}
EXPORT_SYMBOL(netfs_invalidate_folio);
@@ -159,12 +181,20 @@ bool netfs_release_folio(struct folio *folio, gfp_t gfp)
struct netfs_inode *ctx = netfs_inode(folio_inode(folio));
unsigned long long end;
- end = folio_pos(folio) + folio_size(folio);
+ if (folio_test_dirty(folio))
+ return false;
+
+ end = umin(folio_pos(folio) + folio_size(folio), i_size_read(&ctx->inode));
if (end > ctx->zero_point)
ctx->zero_point = end;
if (folio_test_private(folio))
return false;
+ if (unlikely(folio_test_private_2(folio))) { /* [DEPRECATED] */
+ if (current_is_kswapd() || !(gfp & __GFP_FS))
+ return false;
+ folio_wait_private_2(folio);
+ }
fscache_note_page_release(netfs_i_cookie(ctx));
return true;
}
diff --git a/fs/netfs/write_collect.c b/fs/netfs/write_collect.c
index 426cf87aaf2e..ae7a2043f670 100644
--- a/fs/netfs/write_collect.c
+++ b/fs/netfs/write_collect.c
@@ -33,6 +33,7 @@
int netfs_folio_written_back(struct folio *folio)
{
enum netfs_folio_trace why = netfs_folio_trace_clear;
+ struct netfs_inode *ictx = netfs_inode(folio->mapping->host);
struct netfs_folio *finfo;
struct netfs_group *group = NULL;
int gcount = 0;
@@ -41,6 +42,12 @@ int netfs_folio_written_back(struct folio *folio)
/* Streaming writes cannot be redirtied whilst under writeback,
* so discard the streaming record.
*/
+ unsigned long long fend;
+
+ fend = folio_pos(folio) + finfo->dirty_offset + finfo->dirty_len;
+ if (fend > ictx->zero_point)
+ ictx->zero_point = fend;
+
folio_detach_private(folio);
group = finfo->netfs_group;
gcount++;
diff --git a/fs/overlayfs/params.c b/fs/overlayfs/params.c
index 4860fcc4611b..d0568c091341 100644
--- a/fs/overlayfs/params.c
+++ b/fs/overlayfs/params.c
@@ -353,6 +353,8 @@ static void ovl_add_layer(struct fs_context *fc, enum ovl_opt layer,
case Opt_datadir_add:
ctx->nr_data++;
fallthrough;
+ case Opt_lowerdir:
+ fallthrough;
case Opt_lowerdir_add:
WARN_ON(ctx->nr >= ctx->capacity);
l = &ctx->lower[ctx->nr++];
@@ -365,10 +367,9 @@ static void ovl_add_layer(struct fs_context *fc, enum ovl_opt layer,
}
}
-static int ovl_parse_layer(struct fs_context *fc, struct fs_parameter *param,
- enum ovl_opt layer)
+static int ovl_parse_layer(struct fs_context *fc, const char *layer_name, enum ovl_opt layer)
{
- char *name = kstrdup(param->string, GFP_KERNEL);
+ char *name = kstrdup(layer_name, GFP_KERNEL);
bool upper = (layer == Opt_upperdir || layer == Opt_workdir);
struct path path;
int err;
@@ -376,7 +377,7 @@ static int ovl_parse_layer(struct fs_context *fc, struct fs_parameter *param,
if (!name)
return -ENOMEM;
- if (upper)
+ if (upper || layer == Opt_lowerdir)
err = ovl_mount_dir(name, &path);
else
err = ovl_mount_dir_noesc(name, &path);
@@ -432,7 +433,6 @@ static int ovl_parse_param_lowerdir(const char *name, struct fs_context *fc)
{
int err;
struct ovl_fs_context *ctx = fc->fs_private;
- struct ovl_fs_context_layer *l;
char *dup = NULL, *iter;
ssize_t nr_lower, nr;
bool data_layer = false;
@@ -449,7 +449,7 @@ static int ovl_parse_param_lowerdir(const char *name, struct fs_context *fc)
return 0;
if (*name == ':') {
- pr_err("cannot append lower layer");
+ pr_err("cannot append lower layer\n");
return -EINVAL;
}
@@ -472,35 +472,11 @@ static int ovl_parse_param_lowerdir(const char *name, struct fs_context *fc)
goto out_err;
}
- if (nr_lower > ctx->capacity) {
- err = -ENOMEM;
- l = krealloc_array(ctx->lower, nr_lower, sizeof(*ctx->lower),
- GFP_KERNEL_ACCOUNT);
- if (!l)
- goto out_err;
-
- ctx->lower = l;
- ctx->capacity = nr_lower;
- }
-
iter = dup;
- l = ctx->lower;
- for (nr = 0; nr < nr_lower; nr++, l++) {
- ctx->nr++;
- memset(l, 0, sizeof(*l));
-
- err = ovl_mount_dir(iter, &l->path);
+ for (nr = 0; nr < nr_lower; nr++) {
+ err = ovl_parse_layer(fc, iter, Opt_lowerdir);
if (err)
- goto out_put;
-
- err = ovl_mount_dir_check(fc, &l->path, Opt_lowerdir, iter, false);
- if (err)
- goto out_put;
-
- err = -ENOMEM;
- l->name = kstrdup(iter, GFP_KERNEL_ACCOUNT);
- if (!l->name)
- goto out_put;
+ goto out_err;
if (data_layer)
ctx->nr_data++;
@@ -517,8 +493,8 @@ static int ovl_parse_param_lowerdir(const char *name, struct fs_context *fc)
* there are no data layers.
*/
if (ctx->nr_data > 0) {
- pr_err("regular lower layers cannot follow data lower layers");
- goto out_put;
+ pr_err("regular lower layers cannot follow data lower layers\n");
+ goto out_err;
}
data_layer = false;
@@ -532,9 +508,6 @@ static int ovl_parse_param_lowerdir(const char *name, struct fs_context *fc)
kfree(dup);
return 0;
-out_put:
- ovl_reset_lowerdirs(ctx);
-
out_err:
kfree(dup);
@@ -582,7 +555,7 @@ static int ovl_parse_param(struct fs_context *fc, struct fs_parameter *param)
case Opt_datadir_add:
case Opt_upperdir:
case Opt_workdir:
- err = ovl_parse_layer(fc, param, opt);
+ err = ovl_parse_layer(fc, param->string, opt);
break;
case Opt_default_permissions:
config->default_permissions = true;
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index 68758b6fed94..0addcc849ff2 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -126,7 +126,7 @@ static int romfs_read_folio(struct file *file, struct folio *folio)
}
}
- buf = folio_zero_tail(folio, fillsize, buf);
+ buf = folio_zero_tail(folio, fillsize, buf + fillsize);
kunmap_local(buf);
folio_end_read(folio, ret == 0);
return ret;
diff --git a/kernel/fork.c b/kernel/fork.c
index 18bdc87209d0..cc760491f201 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2053,23 +2053,10 @@ static int __pidfd_prepare(struct pid *pid, unsigned int flags, struct file **re
*/
int pidfd_prepare(struct pid *pid, unsigned int flags, struct file **ret)
{
- if (!pid)
- return -EINVAL;
-
- scoped_guard(rcu) {
- struct task_struct *tsk;
-
- if (flags & PIDFD_THREAD)
- tsk = pid_task(pid, PIDTYPE_PID);
- else
- tsk = pid_task(pid, PIDTYPE_TGID);
- if (!tsk)
- return -EINVAL;
+ bool thread = flags & PIDFD_THREAD;
- /* Don't create pidfds for kernel threads for now. */
- if (tsk->flags & PF_KTHREAD)
- return -EINVAL;
- }
+ if (!pid || !pid_has_task(pid, thread ? PIDTYPE_PID : PIDTYPE_TGID))
+ return -EINVAL;
return __pidfd_prepare(pid, flags, ret);
}
@@ -2416,12 +2403,6 @@ __latent_entropy struct task_struct *copy_process(
if (clone_flags & CLONE_PIDFD) {
int flags = (clone_flags & CLONE_THREAD) ? PIDFD_THREAD : 0;
- /* Don't create pidfds for kernel threads for now. */
- if (args->kthread) {
- retval = -EINVAL;
- goto bad_fork_free_pid;
- }
-
/* Note that no task has been attached to @pid yet. */
retval = __pidfd_prepare(pid, flags, &pidfile);
if (retval < 0)
diff --git a/mm/truncate.c b/mm/truncate.c
index 4d61fbdd4b2f..0668cd340a46 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -157,7 +157,7 @@ static void truncate_cleanup_folio(struct folio *folio)
if (folio_mapped(folio))
unmap_mapping_folio(folio);
- if (folio_has_private(folio))
+ if (folio_needs_release(folio))
folio_invalidate(folio, 0, folio_size(folio));
/*
@@ -219,7 +219,7 @@ bool truncate_inode_partial_folio(struct folio *folio, loff_t start, loff_t end)
if (!mapping_inaccessible(folio->mapping))
folio_zero_range(folio, offset, length);
- if (folio_has_private(folio))
+ if (folio_needs_release(folio))
folio_invalidate(folio, offset, length);
if (!folio_test_large(folio))
return true;
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-26 08:08:34 +0100