import CS fuse3-3.10.2-8.el9
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fb5a82ecef
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From 51bc827df873d9ff4069b83796cd32fcb6bd659e Mon Sep 17 00:00:00 2001
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From: HereThereBeDragons <HereThereBeDragons@users.noreply.github.com>
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Date: Fri, 30 Jun 2023 14:57:06 +0200
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Subject: [PATCH] Make expire only function fail if no kernel support (#789)
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---
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include/fuse_common.h | 2 +-
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include/fuse_lowlevel.h | 28 ++++++++++++++--------------
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lib/fuse_lowlevel.c | 41 ++++++++++++++++++++++++++++++++++++-----
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3 files changed, 51 insertions(+), 20 deletions(-)
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--- a/include/fuse_common.h
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+++ b/include/fuse_common.h
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@@ -395,7 +395,7 @@ struct fuse_loop_config {
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#define FUSE_CAP_EXPLICIT_INVAL_DATA (1 << 25)
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/**
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- * Indicates support that dentries can be expired or invalidated.
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+ * Indicates support that dentries can be expired.
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*
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* Expiring dentries, instead of invalidating them, makes a difference for
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* overmounted dentries, where plain invalidation would detach all submounts
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--- a/include/fuse_lowlevel.h
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+++ b/include/fuse_lowlevel.h
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@@ -128,11 +128,12 @@ struct fuse_forget_data {
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};
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/**
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- * Flags for fuse_lowlevel_notify_expire_entry()
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+ * Flags for fuse_lowlevel_notify_entry()
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* 0 = invalidate entry
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* FUSE_LL_EXPIRE_ONLY = expire entry
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*/
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-enum fuse_expire_flags {
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+enum fuse_notify_entry_flags {
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+ FUSE_LL_INVALIDATE = 0,
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FUSE_LL_EXPIRE_ONLY = (1 << 0),
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};
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@@ -1657,8 +1658,7 @@ int fuse_lowlevel_notify_inval_inode(str
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off_t off, off_t len);
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/**
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- * Notify to invalidate parent attributes and the dentry matching
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- * parent/name
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+ * Notify to invalidate parent attributes and the dentry matching parent/name
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*
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* To avoid a deadlock this function must not be called in the
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* execution path of a related filesytem operation or within any code
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@@ -1685,14 +1685,13 @@ int fuse_lowlevel_notify_inval_entry(str
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const char *name, size_t namelen);
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/**
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- * Notify to expire or invalidate parent attributes and the dentry
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- * matching parent/name
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+ * Notify to expire parent attributes and the dentry matching parent/name
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*
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- * Underlying function for fuse_lowlevel_notify_inval_entry().
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+ * Same restrictions apply as for fuse_lowlevel_notify_inval_entry()
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*
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- * In addition to invalidating an entry, it also allows to expire an entry.
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- * In that case, the entry is not forcefully removed from kernel cache
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- * but instead the next access to it forces a lookup from the filesystem.
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+ * Compared to invalidating an entry, expiring the entry results not in a
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+ * forceful removal of that entry from kernel cache but instead the next access
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+ * to it forces a lookup from the filesystem.
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*
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* This makes a difference for overmounted dentries, where plain invalidation
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* would detach all submounts before dropping the dentry from the cache.
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@@ -1703,17 +1702,18 @@ int fuse_lowlevel_notify_inval_entry(str
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* so invalidation will only be triggered for the non-overmounted case.
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* The dentry could also be mounted in a different mount instance, in which case
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* any submounts will still be detached.
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+ *
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+ * Added in FUSE protocol version 7.38. If the kernel does not support
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+ * this (or a newer) version, the function will return -ENOSYS and do nothing.
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*
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* @param se the session object
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* @param parent inode number
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* @param name file name
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* @param namelen strlen() of file name
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- * @param flags flags to control if the entry should be expired or invalidated
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- * @return zero for success, -errno for failure
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+ * @return zero for success, -errno for failure, -enosys if no kernel support
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*/
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int fuse_lowlevel_notify_expire_entry(struct fuse_session *se, fuse_ino_t parent,
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- const char *name, size_t namelen,
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- enum fuse_expire_flags flags);
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+ const char *name, size_t namelen);
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/**
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* This function behaves like fuse_lowlevel_notify_inval_entry() with
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--- a/lib/fuse_lowlevel.c
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+++ b/lib/fuse_lowlevel.c
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@@ -2257,9 +2257,28 @@ int fuse_lowlevel_notify_inval_inode(str
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return send_notify_iov(se, FUSE_NOTIFY_INVAL_INODE, iov, 2);
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}
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-int fuse_lowlevel_notify_expire_entry(struct fuse_session *se, fuse_ino_t parent,
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- const char *name, size_t namelen,
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- enum fuse_expire_flags flags)
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+/**
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+ * Notify parent attributes and the dentry matching parent/name
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+ *
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+ * Underlying base function for fuse_lowlevel_notify_inval_entry() and
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+ * fuse_lowlevel_notify_expire_entry().
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+ *
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+ * @warning
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+ * Only checks if fuse_lowlevel_notify_inval_entry() is supported by
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+ * the kernel. All other flags will fall back to
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+ * fuse_lowlevel_notify_inval_entry() if not supported!
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+ * DO THE PROPER CHECKS IN THE DERIVED FUNCTION!
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+ *
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+ * @param se the session object
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+ * @param parent inode number
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+ * @param name file name
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+ * @param namelen strlen() of file name
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+ * @param flags flags to control if the entry should be expired or invalidated
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+ * @return zero for success, -errno for failure
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+*/
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+static int fuse_lowlevel_notify_entry(struct fuse_session *se, fuse_ino_t parent,
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+ const char *name, size_t namelen,
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+ enum fuse_notify_entry_flags flags)
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{
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struct fuse_notify_inval_entry_out outarg;
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struct iovec iov[3];
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@@ -2285,9 +2304,21 @@ int fuse_lowlevel_notify_expire_entry(st
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}
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int fuse_lowlevel_notify_inval_entry(struct fuse_session *se, fuse_ino_t parent,
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- const char *name, size_t namelen)
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+ const char *name, size_t namelen)
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+{
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+ return fuse_lowlevel_notify_entry(se, parent, name, namelen, FUSE_LL_INVALIDATE);
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+}
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+
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+int fuse_lowlevel_notify_expire_entry(struct fuse_session *se, fuse_ino_t parent,
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+ const char *name, size_t namelen)
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{
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- return fuse_lowlevel_notify_expire_entry(se, parent, name, namelen, 0);
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+ if (!se)
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+ return -EINVAL;
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+
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+ if (!(se->conn.capable & FUSE_CAP_EXPIRE_ONLY))
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+ return -ENOSYS;
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+
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+ return fuse_lowlevel_notify_entry(se, parent, name, namelen, FUSE_LL_EXPIRE_ONLY);
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}
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@ -0,0 +1,42 @@
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From 2c736f516f28dfb5c58aff345c668a5ea6386295 Mon Sep 17 00:00:00 2001
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From: Miklos Szeredi <mszeredi@redhat.com>
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Date: Wed, 10 Jan 2024 10:15:43 +0100
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Subject: [PATCH] Don't set FUSE_CAP_PARALLEL_DIROPS by default
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Allowing parallel dir operations could result in a crash in a filesystem
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implementation that is not prepared for this.
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To be safe keep this flag off by default (this is not a regression, since
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there was no public release where this flag wasn't ignored).
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If the filesystem wants better performance, then it should set this flag
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explicitly.
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Fixes: c9905341ea34 ("Pass FUSE_PARALLEL_DIROPS to kernel (#861)")
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Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
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---
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include/fuse_common.h | 2 --
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lib/fuse_lowlevel.c | 1 -
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2 files changed, 3 deletions(-)
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--- a/include/fuse_common.h
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+++ b/include/fuse_common.h
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@@ -313,8 +313,6 @@ struct fuse_loop_config {
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* is unset, the FUSE kernel module will ensure that lookup() and
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* readdir() requests are never issued concurrently for the same
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* directory.
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- *
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- * This feature is enabled by default when supported by the kernel.
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*/
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#define FUSE_CAP_PARALLEL_DIROPS (1 << 18)
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--- a/lib/fuse_lowlevel.c
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+++ b/lib/fuse_lowlevel.c
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@@ -2009,7 +2009,6 @@ void do_init(fuse_req_t req, fuse_ino_t
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if ((cond) && (se->conn.capable & (cap))) \
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se->conn.want |= (cap)
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LL_SET_DEFAULT(1, FUSE_CAP_ASYNC_READ);
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- LL_SET_DEFAULT(1, FUSE_CAP_PARALLEL_DIROPS);
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LL_SET_DEFAULT(1, FUSE_CAP_AUTO_INVAL_DATA);
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LL_SET_DEFAULT(1, FUSE_CAP_HANDLE_KILLPRIV);
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LL_SET_DEFAULT(1, FUSE_CAP_ASYNC_DIO);
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@ -0,0 +1,23 @@
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From c9905341ea34ff9acbc11b3c53ba8bcea35eeed8 Mon Sep 17 00:00:00 2001
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From: fdinoff <fdinoff@google.com>
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Date: Thu, 16 Nov 2023 06:23:20 -0500
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Subject: [PATCH] Pass FUSE_PARALLEL_DIROPS to kernel (#861)
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This tells the kernel that parallel lookup/readdir operations are
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supported. This is enabled by default but was not passed to the kernel
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so you always get the synchronized version.
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---
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lib/fuse_lowlevel.c | 2 ++
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1 file changed, 2 insertions(+)
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--- a/lib/fuse_lowlevel.c
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+++ b/lib/fuse_lowlevel.c
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@@ -2093,6 +2093,8 @@ void do_init(fuse_req_t req, fuse_ino_t
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outargflags |= FUSE_ASYNC_DIO;
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if (se->conn.want & FUSE_CAP_WRITEBACK_CACHE)
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outargflags |= FUSE_WRITEBACK_CACHE;
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+ if (se->conn.want & FUSE_CAP_PARALLEL_DIROPS)
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+ outargflags |= FUSE_PARALLEL_DIROPS;
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if (se->conn.want & FUSE_CAP_POSIX_ACL)
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outargflags |= FUSE_POSIX_ACL;
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if (se->conn.want & FUSE_CAP_CACHE_SYMLINKS)
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@ -1,6 +1,6 @@
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Name: fuse3
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Version: 3.10.2
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Release: 6%{?dist}
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Release: 8%{?dist}
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Summary: File System in Userspace (FUSE) v3 utilities
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License: GPL+
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URL: http://fuse.sf.net
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@ -12,6 +12,9 @@ Patch2: fuse-3.11.0-Modify-structures-in-libfuse-to-handle-flags-beyond-.patch
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Patch3: fuse-3.13.0-Initial-patch-provided-by-Miklos-Szeredi-mszeredi-re.patch
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Patch4: fuse-3.13.0-adding-comments-and-capability-discovery-enum-for-fl.patch
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Patch5: rhel-only-bz2188182-libfuse-add-feature-flag-for-expire-only.patch
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Patch6: fuse-3.16.1-Make-expire-only-function-fail-if-no-kernel-support-.patch
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Patch7: fuse-3.17.0-Pass-FUSE_PARALLEL_DIROPS-to-kernel-861.patch
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Patch8: fuse-3.17.0-Don-t-set-FUSE_CAP_PARALLEL_DIROPS-by-default.patch
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BuildRequires: which
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%if ! 0%{?el6}
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@ -79,6 +82,9 @@ Common files for FUSE v2 and FUSE v3.
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%patch3 -p1
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%patch4 -p1
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%patch5 -p1
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%patch6 -p1
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%patch7 -p1
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%patch8 -p1
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%build
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export LC_ALL=en_US.UTF-8
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@ -168,6 +174,14 @@ rm -f %{buildroot}/usr/lib/udev/rules.d/99-fuse3.rules
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%endif
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%changelog
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* Wed Feb 07 2024 Pavel Reichl <preichl@redhat.com> - 3.10.2-8
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- Advertise support of FUSE_PARALLEL_DIROPS to kernel
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- Related: RHEL-24721
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* Tue Jan 30 2024 Pavel Reichl <preichl@redhat.com> - 3.10.2-7
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- Synchronize expire-only API with upstream.
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- Related: RHEL-23414
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* Thu Jul 13 2023 Pavel Reichl <preichl@redhat.com> - 3.10.2-6
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- Fix feature_notify_inode_expire_only related(rhbz#2188182)
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