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Diffstat (limited to 'fs/fuse/inode.c')
-rw-r--r--fs/fuse/inode.c72
1 files changed, 62 insertions, 10 deletions
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index e9db2cb8c150..ecb869e895ab 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -9,6 +9,7 @@
#include "fuse_i.h"
#include "dev_uring_i.h"
+#include <linux/dax.h>
#include <linux/pagemap.h>
#include <linux/slab.h>
#include <linux/file.h>
@@ -37,8 +38,11 @@ DEFINE_MUTEX(fuse_mutex);
static int set_global_limit(const char *val, const struct kernel_param *kp);
unsigned int fuse_max_pages_limit = 256;
+/* default is no timeout */
+unsigned int fuse_default_req_timeout;
+unsigned int fuse_max_req_timeout;
-unsigned max_user_bgreq;
+unsigned int max_user_bgreq;
module_param_call(max_user_bgreq, set_global_limit, param_get_uint,
&max_user_bgreq, 0644);
__MODULE_PARM_TYPE(max_user_bgreq, "uint");
@@ -46,7 +50,7 @@ MODULE_PARM_DESC(max_user_bgreq,
"Global limit for the maximum number of backgrounded requests an "
"unprivileged user can set");
-unsigned max_user_congthresh;
+unsigned int max_user_congthresh;
module_param_call(max_user_congthresh, set_global_limit, param_get_uint,
&max_user_congthresh, 0644);
__MODULE_PARM_TYPE(max_user_congthresh, "uint");
@@ -159,6 +163,9 @@ static void fuse_evict_inode(struct inode *inode)
/* Will write inode on close/munmap and in all other dirtiers */
WARN_ON(inode->i_state & I_DIRTY_INODE);
+ if (FUSE_IS_DAX(inode))
+ dax_break_layout_final(inode);
+
truncate_inode_pages_final(&inode->i_data);
clear_inode(inode);
if (inode->i_sb->s_flags & SB_ACTIVE) {
@@ -959,6 +966,7 @@ void fuse_conn_init(struct fuse_conn *fc, struct fuse_mount *fm,
init_rwsem(&fc->killsb);
refcount_set(&fc->count, 1);
atomic_set(&fc->dev_count, 1);
+ atomic_set(&fc->epoch, 1);
init_waitqueue_head(&fc->blocked_waitq);
fuse_iqueue_init(&fc->iq, fiq_ops, fiq_priv);
INIT_LIST_HEAD(&fc->bg_queue);
@@ -979,6 +987,8 @@ void fuse_conn_init(struct fuse_conn *fc, struct fuse_mount *fm,
fc->user_ns = get_user_ns(user_ns);
fc->max_pages = FUSE_DEFAULT_MAX_PAGES_PER_REQ;
fc->max_pages_limit = fuse_max_pages_limit;
+ fc->name_max = FUSE_NAME_LOW_MAX;
+ fc->timeout.req_timeout = 0;
if (IS_ENABLED(CONFIG_FUSE_PASSTHROUGH))
fuse_backing_files_init(fc);
@@ -1007,6 +1017,8 @@ void fuse_conn_put(struct fuse_conn *fc)
if (IS_ENABLED(CONFIG_FUSE_DAX))
fuse_dax_conn_free(fc);
+ if (fc->timeout.req_timeout)
+ cancel_delayed_work_sync(&fc->timeout.work);
if (fiq->ops->release)
fiq->ops->release(fiq);
put_pid_ns(fc->pid_ns);
@@ -1029,7 +1041,7 @@ struct fuse_conn *fuse_conn_get(struct fuse_conn *fc)
}
EXPORT_SYMBOL_GPL(fuse_conn_get);
-static struct inode *fuse_get_root_inode(struct super_block *sb, unsigned mode)
+static struct inode *fuse_get_root_inode(struct super_block *sb, unsigned int mode)
{
struct fuse_attr attr;
memset(&attr, 0, sizeof(attr));
@@ -1204,7 +1216,7 @@ static const struct super_operations fuse_super_operations = {
.show_options = fuse_show_options,
};
-static void sanitize_global_limit(unsigned *limit)
+static void sanitize_global_limit(unsigned int *limit)
{
/*
* The default maximum number of async requests is calculated to consume
@@ -1225,7 +1237,7 @@ static int set_global_limit(const char *val, const struct kernel_param *kp)
if (rv)
return rv;
- sanitize_global_limit((unsigned *)kp->arg);
+ sanitize_global_limit((unsigned int *)kp->arg);
return 0;
}
@@ -1257,6 +1269,34 @@ static void process_init_limits(struct fuse_conn *fc, struct fuse_init_out *arg)
spin_unlock(&fc->bg_lock);
}
+static void set_request_timeout(struct fuse_conn *fc, unsigned int timeout)
+{
+ fc->timeout.req_timeout = secs_to_jiffies(timeout);
+ INIT_DELAYED_WORK(&fc->timeout.work, fuse_check_timeout);
+ queue_delayed_work(system_wq, &fc->timeout.work,
+ fuse_timeout_timer_freq);
+}
+
+static void init_server_timeout(struct fuse_conn *fc, unsigned int timeout)
+{
+ if (!timeout && !fuse_max_req_timeout && !fuse_default_req_timeout)
+ return;
+
+ if (!timeout)
+ timeout = fuse_default_req_timeout;
+
+ if (fuse_max_req_timeout) {
+ if (timeout)
+ timeout = min(fuse_max_req_timeout, timeout);
+ else
+ timeout = fuse_max_req_timeout;
+ }
+
+ timeout = max(FUSE_TIMEOUT_TIMER_FREQ, timeout);
+
+ set_request_timeout(fc, timeout);
+}
+
struct fuse_init_args {
struct fuse_args args;
struct fuse_init_in in;
@@ -1275,6 +1315,7 @@ static void process_init_reply(struct fuse_mount *fm, struct fuse_args *args,
ok = false;
else {
unsigned long ra_pages;
+ unsigned int timeout = 0;
process_init_limits(fc, arg);
@@ -1338,6 +1379,13 @@ static void process_init_reply(struct fuse_mount *fm, struct fuse_args *args,
fc->max_pages =
min_t(unsigned int, fc->max_pages_limit,
max_t(unsigned int, arg->max_pages, 1));
+
+ /*
+ * PATH_MAX file names might need two pages for
+ * ops like rename
+ */
+ if (fc->max_pages > 1)
+ fc->name_max = FUSE_NAME_MAX;
}
if (IS_ENABLED(CONFIG_FUSE_DAX)) {
if (flags & FUSE_MAP_ALIGNMENT &&
@@ -1392,12 +1440,17 @@ static void process_init_reply(struct fuse_mount *fm, struct fuse_args *args,
}
if (flags & FUSE_OVER_IO_URING && fuse_uring_enabled())
fc->io_uring = 1;
+
+ if (flags & FUSE_REQUEST_TIMEOUT)
+ timeout = arg->request_timeout;
} else {
ra_pages = fc->max_read / PAGE_SIZE;
fc->no_lock = 1;
fc->no_flock = 1;
}
+ init_server_timeout(fc, timeout);
+
fm->sb->s_bdi->ra_pages =
min(fm->sb->s_bdi->ra_pages, ra_pages);
fc->minor = arg->minor;
@@ -1439,7 +1492,8 @@ void fuse_send_init(struct fuse_mount *fm)
FUSE_HANDLE_KILLPRIV_V2 | FUSE_SETXATTR_EXT | FUSE_INIT_EXT |
FUSE_SECURITY_CTX | FUSE_CREATE_SUPP_GROUP |
FUSE_HAS_EXPIRE_ONLY | FUSE_DIRECT_IO_ALLOW_MMAP |
- FUSE_NO_EXPORT_SUPPORT | FUSE_HAS_RESEND | FUSE_ALLOW_IDMAP;
+ FUSE_NO_EXPORT_SUPPORT | FUSE_HAS_RESEND | FUSE_ALLOW_IDMAP |
+ FUSE_REQUEST_TIMEOUT;
#ifdef CONFIG_FUSE_DAX
if (fm->fc->dax)
flags |= FUSE_MAP_ALIGNMENT;
@@ -1665,7 +1719,7 @@ static int fuse_fill_super_submount(struct super_block *sb,
fi = get_fuse_inode(root);
fi->nlookup--;
- sb->s_d_op = &fuse_dentry_operations;
+ set_default_d_op(sb, &fuse_dentry_operations);
sb->s_root = d_make_root(root);
if (!sb->s_root)
return -ENOMEM;
@@ -1800,12 +1854,10 @@ int fuse_fill_super_common(struct super_block *sb, struct fuse_fs_context *ctx)
err = -ENOMEM;
root = fuse_get_root_inode(sb, ctx->rootmode);
- sb->s_d_op = &fuse_root_dentry_operations;
+ set_default_d_op(sb, &fuse_dentry_operations);
root_dentry = d_make_root(root);
if (!root_dentry)
goto err_dev_free;
- /* Root dentry doesn't have .d_revalidate */
- sb->s_d_op = &fuse_dentry_operations;
mutex_lock(&fuse_mutex);
err = -EINVAL;
generated by cgit (git 2.34.1) at 2025-08-05 19:13:17 +0000