usb-serial-option-add-simcom-sim7500-sim7600-mbim-mode.patch
usb-serial-option-add-fibocom-nl668-series.patch
usb-serial-option-add-telit-ln940-series.patch
-ubifs-handle-re-linking-of-inodes-correctly-while-recovery.patch
scsi-sd-use-mempool-for-discard-special-page.patch
+++ /dev/null
-From e58725d51fa8da9133f3f1c54170aa2e43056b91 Mon Sep 17 00:00:00 2001
-From: Richard Weinberger <richard@nod.at>
-Date: Wed, 7 Nov 2018 23:04:43 +0100
-Subject: ubifs: Handle re-linking of inodes correctly while recovery
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-From: Richard Weinberger <richard@nod.at>
-
-commit e58725d51fa8da9133f3f1c54170aa2e43056b91 upstream.
-
-UBIFS's recovery code strictly assumes that a deleted inode will never
-come back, therefore it removes all data which belongs to that inode
-as soon it faces an inode with link count 0 in the replay list.
-Before O_TMPFILE this assumption was perfectly fine. With O_TMPFILE
-it can lead to data loss upon a power-cut.
-
-Consider a journal with entries like:
-0: inode X (nlink = 0) /* O_TMPFILE was created */
-1: data for inode X /* Someone writes to the temp file */
-2: inode X (nlink = 0) /* inode was changed, xattr, chmod, … */
-3: inode X (nlink = 1) /* inode was re-linked via linkat() */
-
-Upon replay of entry #2 UBIFS will drop all data that belongs to inode X,
-this will lead to an empty file after mounting.
-
-As solution for this problem, scan the replay list for a re-link entry
-before dropping data.
-
-Fixes: 474b93704f32 ("ubifs: Implement O_TMPFILE")
-Cc: stable@vger.kernel.org
-Cc: Russell Senior <russell@personaltelco.net>
-Cc: Rafał Miłecki <zajec5@gmail.com>
-Reported-by: Russell Senior <russell@personaltelco.net>
-Reported-by: Rafał Miłecki <zajec5@gmail.com>
-Tested-by: Rafał Miłecki <rafal@milecki.pl>
-Signed-off-by: Richard Weinberger <richard@nod.at>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-
----
- fs/ubifs/replay.c | 37 +++++++++++++++++++++++++++++++++++++
- 1 file changed, 37 insertions(+)
-
---- a/fs/ubifs/replay.c
-+++ b/fs/ubifs/replay.c
-@@ -210,6 +210,38 @@ static int trun_remove_range(struct ubif
- }
-
- /**
-+ * inode_still_linked - check whether inode in question will be re-linked.
-+ * @c: UBIFS file-system description object
-+ * @rino: replay entry to test
-+ *
-+ * O_TMPFILE files can be re-linked, this means link count goes from 0 to 1.
-+ * This case needs special care, otherwise all references to the inode will
-+ * be removed upon the first replay entry of an inode with link count 0
-+ * is found.
-+ */
-+static bool inode_still_linked(struct ubifs_info *c, struct replay_entry *rino)
-+{
-+ struct replay_entry *r;
-+
-+ ubifs_assert(c, rino->deletion);
-+ ubifs_assert(c, key_type(c, &rino->key) == UBIFS_INO_KEY);
-+
-+ /*
-+ * Find the most recent entry for the inode behind @rino and check
-+ * whether it is a deletion.
-+ */
-+ list_for_each_entry_reverse(r, &c->replay_list, list) {
-+ ubifs_assert(c, r->sqnum >= rino->sqnum);
-+ if (key_inum(c, &r->key) == key_inum(c, &rino->key))
-+ return r->deletion == 0;
-+
-+ }
-+
-+ ubifs_assert(c, 0);
-+ return false;
-+}
-+
-+/**
- * apply_replay_entry - apply a replay entry to the TNC.
- * @c: UBIFS file-system description object
- * @r: replay entry to apply
-@@ -239,6 +271,11 @@ static int apply_replay_entry(struct ubi
- {
- ino_t inum = key_inum(c, &r->key);
-
-+ if (inode_still_linked(c, r)) {
-+ err = 0;
-+ break;
-+ }
-+
- err = ubifs_tnc_remove_ino(c, inum);
- break;
- }
usb-serial-option-add-simcom-sim7500-sim7600-mbim-mode.patch
usb-serial-option-add-fibocom-nl668-series.patch
usb-serial-option-add-telit-ln940-series.patch
-ubifs-handle-re-linking-of-inodes-correctly-while-recovery.patch
+++ /dev/null
-From e58725d51fa8da9133f3f1c54170aa2e43056b91 Mon Sep 17 00:00:00 2001
-From: Richard Weinberger <richard@nod.at>
-Date: Wed, 7 Nov 2018 23:04:43 +0100
-Subject: ubifs: Handle re-linking of inodes correctly while recovery
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-From: Richard Weinberger <richard@nod.at>
-
-commit e58725d51fa8da9133f3f1c54170aa2e43056b91 upstream.
-
-UBIFS's recovery code strictly assumes that a deleted inode will never
-come back, therefore it removes all data which belongs to that inode
-as soon it faces an inode with link count 0 in the replay list.
-Before O_TMPFILE this assumption was perfectly fine. With O_TMPFILE
-it can lead to data loss upon a power-cut.
-
-Consider a journal with entries like:
-0: inode X (nlink = 0) /* O_TMPFILE was created */
-1: data for inode X /* Someone writes to the temp file */
-2: inode X (nlink = 0) /* inode was changed, xattr, chmod, … */
-3: inode X (nlink = 1) /* inode was re-linked via linkat() */
-
-Upon replay of entry #2 UBIFS will drop all data that belongs to inode X,
-this will lead to an empty file after mounting.
-
-As solution for this problem, scan the replay list for a re-link entry
-before dropping data.
-
-Fixes: 474b93704f32 ("ubifs: Implement O_TMPFILE")
-Cc: stable@vger.kernel.org
-Cc: Russell Senior <russell@personaltelco.net>
-Cc: Rafał Miłecki <zajec5@gmail.com>
-Reported-by: Russell Senior <russell@personaltelco.net>
-Reported-by: Rafał Miłecki <zajec5@gmail.com>
-Tested-by: Rafał Miłecki <rafal@milecki.pl>
-Signed-off-by: Richard Weinberger <richard@nod.at>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-
----
- fs/ubifs/replay.c | 37 +++++++++++++++++++++++++++++++++++++
- 1 file changed, 37 insertions(+)
-
---- a/fs/ubifs/replay.c
-+++ b/fs/ubifs/replay.c
-@@ -210,6 +210,38 @@ static int trun_remove_range(struct ubif
- }
-
- /**
-+ * inode_still_linked - check whether inode in question will be re-linked.
-+ * @c: UBIFS file-system description object
-+ * @rino: replay entry to test
-+ *
-+ * O_TMPFILE files can be re-linked, this means link count goes from 0 to 1.
-+ * This case needs special care, otherwise all references to the inode will
-+ * be removed upon the first replay entry of an inode with link count 0
-+ * is found.
-+ */
-+static bool inode_still_linked(struct ubifs_info *c, struct replay_entry *rino)
-+{
-+ struct replay_entry *r;
-+
-+ ubifs_assert(c, rino->deletion);
-+ ubifs_assert(c, key_type(c, &rino->key) == UBIFS_INO_KEY);
-+
-+ /*
-+ * Find the most recent entry for the inode behind @rino and check
-+ * whether it is a deletion.
-+ */
-+ list_for_each_entry_reverse(r, &c->replay_list, list) {
-+ ubifs_assert(c, r->sqnum >= rino->sqnum);
-+ if (key_inum(c, &r->key) == key_inum(c, &rino->key))
-+ return r->deletion == 0;
-+
-+ }
-+
-+ ubifs_assert(c, 0);
-+ return false;
-+}
-+
-+/**
- * apply_replay_entry - apply a replay entry to the TNC.
- * @c: UBIFS file-system description object
- * @r: replay entry to apply
-@@ -239,6 +271,11 @@ static int apply_replay_entry(struct ubi
- {
- ino_t inum = key_inum(c, &r->key);
-
-+ if (inode_still_linked(c, r)) {
-+ err = 0;
-+ break;
-+ }
-+
- err = ubifs_tnc_remove_ino(c, inum);
- break;
- }
projects / thirdparty / kernel / stable-queue.git / commitdiff
