This is a note to let you know that I've just added the patch titled
afs: Migrate vlocation fields to 64-bit
to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: afs-migrate-vlocation-fields-to-64-bit.patch and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Mon Dec 18 14:47:43 CET 2017
From: Tina Ruchandani ruchandani.tina@gmail.com Date: Thu, 16 Mar 2017 16:27:46 +0000 Subject: afs: Migrate vlocation fields to 64-bit
From: Tina Ruchandani ruchandani.tina@gmail.com
[ Upstream commit 8a79790bf0b7da216627ffb85f52cfb4adbf1e4e ]
get_seconds() returns real wall-clock seconds. On 32-bit systems this value will overflow in year 2038 and beyond. This patch changes afs's vlocation record to use ktime_get_real_seconds() instead, for the fields time_of_death and update_at.
Signed-off-by: Tina Ruchandani ruchandani.tina@gmail.com Signed-off-by: David Howells dhowells@redhat.com Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/afs/callback.c | 7 ++++--- fs/afs/internal.h | 7 ++++--- fs/afs/server.c | 6 +++--- fs/afs/vlocation.c | 16 +++++++++------- 4 files changed, 20 insertions(+), 16 deletions(-)
--- a/fs/afs/callback.c +++ b/fs/afs/callback.c @@ -362,7 +362,7 @@ static void afs_callback_updater(struct { struct afs_server *server; struct afs_vnode *vnode, *xvnode; - time_t now; + time64_t now; long timeout; int ret;
@@ -370,7 +370,7 @@ static void afs_callback_updater(struct
_enter("");
- now = get_seconds(); + now = ktime_get_real_seconds();
/* find the first vnode to update */ spin_lock(&server->cb_lock); @@ -424,7 +424,8 @@ static void afs_callback_updater(struct
/* and then reschedule */ _debug("reschedule"); - vnode->update_at = get_seconds() + afs_vnode_update_timeout; + vnode->update_at = ktime_get_real_seconds() + + afs_vnode_update_timeout;
spin_lock(&server->cb_lock);
--- a/fs/afs/internal.h +++ b/fs/afs/internal.h @@ -11,6 +11,7 @@
#include <linux/compiler.h> #include <linux/kernel.h> +#include <linux/ktime.h> #include <linux/fs.h> #include <linux/pagemap.h> #include <linux/skbuff.h> @@ -247,7 +248,7 @@ struct afs_cache_vhash { */ struct afs_vlocation { atomic_t usage; - time_t time_of_death; /* time at which put reduced usage to 0 */ + time64_t time_of_death; /* time at which put reduced usage to 0 */ struct list_head link; /* link in cell volume location list */ struct list_head grave; /* link in master graveyard list */ struct list_head update; /* link in master update list */ @@ -258,7 +259,7 @@ struct afs_vlocation { struct afs_cache_vlocation vldb; /* volume information DB record */ struct afs_volume *vols[3]; /* volume access record pointer (index by type) */ wait_queue_head_t waitq; /* status change waitqueue */ - time_t update_at; /* time at which record should be updated */ + time64_t update_at; /* time at which record should be updated */ spinlock_t lock; /* access lock */ afs_vlocation_state_t state; /* volume location state */ unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */ @@ -271,7 +272,7 @@ struct afs_vlocation { */ struct afs_server { atomic_t usage; - time_t time_of_death; /* time at which put reduced usage to 0 */ + time64_t time_of_death; /* time at which put reduced usage to 0 */ struct in_addr addr; /* server address */ struct afs_cell *cell; /* cell in which server resides */ struct list_head link; /* link in cell's server list */ --- a/fs/afs/server.c +++ b/fs/afs/server.c @@ -237,7 +237,7 @@ void afs_put_server(struct afs_server *s spin_lock(&afs_server_graveyard_lock); if (atomic_read(&server->usage) == 0) { list_move_tail(&server->grave, &afs_server_graveyard); - server->time_of_death = get_seconds(); + server->time_of_death = ktime_get_real_seconds(); queue_delayed_work(afs_wq, &afs_server_reaper, afs_server_timeout * HZ); } @@ -272,9 +272,9 @@ static void afs_reap_server(struct work_ LIST_HEAD(corpses); struct afs_server *server; unsigned long delay, expiry; - time_t now; + time64_t now;
- now = get_seconds(); + now = ktime_get_real_seconds(); spin_lock(&afs_server_graveyard_lock);
while (!list_empty(&afs_server_graveyard)) { --- a/fs/afs/vlocation.c +++ b/fs/afs/vlocation.c @@ -340,7 +340,8 @@ static void afs_vlocation_queue_for_upda struct afs_vlocation *xvl;
/* wait at least 10 minutes before updating... */ - vl->update_at = get_seconds() + afs_vlocation_update_timeout; + vl->update_at = ktime_get_real_seconds() + + afs_vlocation_update_timeout;
spin_lock(&afs_vlocation_updates_lock);
@@ -506,7 +507,7 @@ void afs_put_vlocation(struct afs_vlocat if (atomic_read(&vl->usage) == 0) { _debug("buried"); list_move_tail(&vl->grave, &afs_vlocation_graveyard); - vl->time_of_death = get_seconds(); + vl->time_of_death = ktime_get_real_seconds(); queue_delayed_work(afs_wq, &afs_vlocation_reap, afs_vlocation_timeout * HZ);
@@ -543,11 +544,11 @@ static void afs_vlocation_reaper(struct LIST_HEAD(corpses); struct afs_vlocation *vl; unsigned long delay, expiry; - time_t now; + time64_t now;
_enter("");
- now = get_seconds(); + now = ktime_get_real_seconds(); spin_lock(&afs_vlocation_graveyard_lock);
while (!list_empty(&afs_vlocation_graveyard)) { @@ -622,13 +623,13 @@ static void afs_vlocation_updater(struct { struct afs_cache_vlocation vldb; struct afs_vlocation *vl, *xvl; - time_t now; + time64_t now; long timeout; int ret;
_enter("");
- now = get_seconds(); + now = ktime_get_real_seconds();
/* find a record to update */ spin_lock(&afs_vlocation_updates_lock); @@ -684,7 +685,8 @@ static void afs_vlocation_updater(struct
/* and then reschedule */ _debug("reschedule"); - vl->update_at = get_seconds() + afs_vlocation_update_timeout; + vl->update_at = ktime_get_real_seconds() + + afs_vlocation_update_timeout;
spin_lock(&afs_vlocation_updates_lock);
Patches currently in stable-queue which might be from ruchandani.tina@gmail.com are
queue-4.4/afs-prevent-callback-expiry-timer-overflow.patch queue-4.4/afs-migrate-vlocation-fields-to-64-bit.patch