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Diffstat (limited to 'fs/afs/rotate.c')
-rw-r--r--fs/afs/rotate.c224
1 files changed, 160 insertions, 64 deletions
diff --git a/fs/afs/rotate.c b/fs/afs/rotate.c
index a840c3588..68c88e3a0 100644
--- a/fs/afs/rotate.c
+++ b/fs/afs/rotate.c
@@ -13,6 +13,7 @@
#include <linux/sched/signal.h>
#include "internal.h"
#include "afs_fs.h"
+#include "protocol_uae.h"
/*
* Begin iteration through a server list, starting with the vnode's last used
@@ -50,7 +51,7 @@ static bool afs_start_fs_iteration(struct afs_operation *op,
* and have to return an error.
*/
if (op->flags & AFS_OPERATION_CUR_ONLY) {
- op->error = -ESTALE;
+ afs_op_set_error(op, -ESTALE);
return false;
}
@@ -92,7 +93,7 @@ static bool afs_sleep_and_retry(struct afs_operation *op)
if (!(op->flags & AFS_OPERATION_UNINTR)) {
msleep_interruptible(1000);
if (signal_pending(current)) {
- op->error = -ERESTARTSYS;
+ afs_op_set_error(op, -ERESTARTSYS);
return false;
}
} else {
@@ -111,31 +112,34 @@ bool afs_select_fileserver(struct afs_operation *op)
struct afs_addr_list *alist;
struct afs_server *server;
struct afs_vnode *vnode = op->file[0].vnode;
- struct afs_error e;
- u32 rtt;
- int error = op->ac.error, i;
+ unsigned int rtt;
+ s32 abort_code = op->call_abort_code;
+ int error = op->call_error, i;
- _enter("%lx[%d],%lx[%d],%d,%d",
+ op->nr_iterations++;
+
+ _enter("OP=%x+%x,%llx,%lx[%d],%lx[%d],%d,%d",
+ op->debug_id, op->nr_iterations, op->volume->vid,
op->untried, op->index,
op->ac.tried, op->ac.index,
- error, op->ac.abort_code);
+ error, abort_code);
if (op->flags & AFS_OPERATION_STOP) {
_leave(" = f [stopped]");
return false;
}
- op->nr_iterations++;
-
- /* Evaluate the result of the previous operation, if there was one. */
- switch (error) {
- case SHRT_MAX:
+ if (op->nr_iterations == 0)
goto start;
+ /* Evaluate the result of the previous operation, if there was one. */
+ switch (op->call_error) {
case 0:
+ op->cumul_error.responded = true;
+ fallthrough;
default:
/* Success or local failure. Stop. */
- op->error = error;
+ afs_op_set_error(op, error);
op->flags |= AFS_OPERATION_STOP;
_leave(" = f [okay/local %d]", error);
return false;
@@ -143,16 +147,27 @@ bool afs_select_fileserver(struct afs_operation *op)
case -ECONNABORTED:
/* The far side rejected the operation on some grounds. This
* might involve the server being busy or the volume having been moved.
+ *
+ * Note that various V* errors should not be sent to a cache manager
+ * by a fileserver as they should be translated to more modern UAE*
+ * errors instead. IBM AFS and OpenAFS fileservers, however, do leak
+ * these abort codes.
*/
- switch (op->ac.abort_code) {
+ op->cumul_error.responded = true;
+ switch (abort_code) {
case VNOVOL:
/* This fileserver doesn't know about the volume.
* - May indicate that the VL is wrong - retry once and compare
* the results.
* - May indicate that the fileserver couldn't attach to the vol.
+ * - The volume might have been temporarily removed so that it can
+ * be replaced by a volume restore. "vos" might have ended one
+ * transaction and has yet to create the next.
+ * - The volume might not be blessed or might not be in-service
+ * (administrative action).
*/
if (op->flags & AFS_OPERATION_VNOVOL) {
- op->error = -EREMOTEIO;
+ afs_op_accumulate_error(op, -EREMOTEIO, abort_code);
goto next_server;
}
@@ -162,11 +177,13 @@ bool afs_select_fileserver(struct afs_operation *op)
set_bit(AFS_VOLUME_NEEDS_UPDATE, &op->volume->flags);
error = afs_check_volume_status(op->volume, op);
- if (error < 0)
- goto failed_set_error;
+ if (error < 0) {
+ afs_op_set_error(op, error);
+ goto failed;
+ }
if (test_bit(AFS_VOLUME_DELETED, &op->volume->flags)) {
- op->error = -ENOMEDIUM;
+ afs_op_set_error(op, -ENOMEDIUM);
goto failed;
}
@@ -174,7 +191,7 @@ bool afs_select_fileserver(struct afs_operation *op)
* it's the fileserver having trouble.
*/
if (rcu_access_pointer(op->volume->servers) == op->server_list) {
- op->error = -EREMOTEIO;
+ afs_op_accumulate_error(op, -EREMOTEIO, abort_code);
goto next_server;
}
@@ -183,42 +200,91 @@ bool afs_select_fileserver(struct afs_operation *op)
_leave(" = t [vnovol]");
return true;
- case VSALVAGE: /* TODO: Should this return an error or iterate? */
case VVOLEXISTS:
- case VNOSERVICE:
case VONLINE:
- case VDISKFULL:
- case VOVERQUOTA:
- op->error = afs_abort_to_error(op->ac.abort_code);
+ /* These should not be returned from the fileserver. */
+ pr_warn("Fileserver returned unexpected abort %d\n",
+ abort_code);
+ afs_op_accumulate_error(op, -EREMOTEIO, abort_code);
+ goto next_server;
+
+ case VNOSERVICE:
+ /* Prior to AFS 3.2 VNOSERVICE was returned from the fileserver
+ * if the volume was neither in-service nor administratively
+ * blessed. All usage was replaced by VNOVOL because AFS 3.1 and
+ * earlier cache managers did not handle VNOSERVICE and assumed
+ * it was the client OSes errno 105.
+ *
+ * Starting with OpenAFS 1.4.8 VNOSERVICE was repurposed as the
+ * fileserver idle dead time error which was sent in place of
+ * RX_CALL_TIMEOUT (-3). The error was intended to be sent if the
+ * fileserver took too long to send a reply to the client.
+ * RX_CALL_TIMEOUT would have caused the cache manager to mark the
+ * server down whereas VNOSERVICE since AFS 3.2 would cause cache
+ * manager to temporarily (up to 15 minutes) mark the volume
+ * instance as unusable.
+ *
+ * The idle dead logic resulted in cache inconsistency since a
+ * state changing call that the cache manager assumed was dead
+ * could still be processed to completion by the fileserver. This
+ * logic was removed in OpenAFS 1.8.0 and VNOSERVICE is no longer
+ * returned. However, many 1.4.8 through 1.6.24 fileservers are
+ * still in existence.
+ *
+ * AuriStorFS fileservers have never returned VNOSERVICE.
+ *
+ * VNOSERVICE should be treated as an alias for RX_CALL_TIMEOUT.
+ */
+ case RX_CALL_TIMEOUT:
+ afs_op_accumulate_error(op, -ETIMEDOUT, abort_code);
goto next_server;
+ case VSALVAGING: /* This error should not be leaked to cache managers
+ * but is from OpenAFS demand attach fileservers.
+ * It should be treated as an alias for VOFFLINE.
+ */
+ case VSALVAGE: /* VSALVAGE should be treated as a synonym of VOFFLINE */
case VOFFLINE:
+ /* The volume is in use by the volserver or another volume utility
+ * for an operation that might alter the contents. The volume is
+ * expected to come back but it might take a long time (could be
+ * days).
+ */
if (!test_and_set_bit(AFS_VOLUME_OFFLINE, &op->volume->flags)) {
- afs_busy(op->volume, op->ac.abort_code);
+ afs_busy(op->volume, abort_code);
clear_bit(AFS_VOLUME_BUSY, &op->volume->flags);
}
if (op->flags & AFS_OPERATION_NO_VSLEEP) {
- op->error = -EADV;
+ afs_op_set_error(op, -EADV);
goto failed;
}
if (op->flags & AFS_OPERATION_CUR_ONLY) {
- op->error = -ESTALE;
+ afs_op_set_error(op, -ESTALE);
goto failed;
}
goto busy;
- case VSALVAGING:
- case VRESTARTING:
+ case VRESTARTING: /* The fileserver is either shutting down or starting up. */
case VBUSY:
- /* Retry after going round all the servers unless we
- * have a file lock we need to maintain.
+ /* The volume is in use by the volserver or another volume
+ * utility for an operation that is not expected to alter the
+ * contents of the volume. VBUSY does not need to be returned
+ * for a ROVOL or BACKVOL bound to an ITBusy volserver
+ * transaction. The fileserver is permitted to continue serving
+ * content from ROVOLs and BACKVOLs during an ITBusy transaction
+ * because the content will not change. However, many fileserver
+ * releases do return VBUSY for ROVOL and BACKVOL instances under
+ * many circumstances.
+ *
+ * Retry after going round all the servers unless we have a file
+ * lock we need to maintain.
*/
if (op->flags & AFS_OPERATION_NO_VSLEEP) {
- op->error = -EBUSY;
+ afs_op_set_error(op, -EBUSY);
goto failed;
}
if (!test_and_set_bit(AFS_VOLUME_BUSY, &op->volume->flags)) {
- afs_busy(op->volume, op->ac.abort_code);
+ afs_busy(op->volume, abort_code);
clear_bit(AFS_VOLUME_OFFLINE, &op->volume->flags);
}
busy:
@@ -226,7 +292,7 @@ bool afs_select_fileserver(struct afs_operation *op)
if (!afs_sleep_and_retry(op))
goto failed;
- /* Retry with same server & address */
+ /* Retry with same server & address */
_leave(" = t [vbusy]");
return true;
}
@@ -243,7 +309,7 @@ bool afs_select_fileserver(struct afs_operation *op)
* honour, just in case someone sets up a loop.
*/
if (op->flags & AFS_OPERATION_VMOVED) {
- op->error = -EREMOTEIO;
+ afs_op_set_error(op, -EREMOTEIO);
goto failed;
}
op->flags |= AFS_OPERATION_VMOVED;
@@ -251,8 +317,10 @@ bool afs_select_fileserver(struct afs_operation *op)
set_bit(AFS_VOLUME_WAIT, &op->volume->flags);
set_bit(AFS_VOLUME_NEEDS_UPDATE, &op->volume->flags);
error = afs_check_volume_status(op->volume, op);
- if (error < 0)
- goto failed_set_error;
+ if (error < 0) {
+ afs_op_set_error(op, error);
+ goto failed;
+ }
/* If the server list didn't change, then the VLDB is
* out of sync with the fileservers. This is hopefully
@@ -264,22 +332,48 @@ bool afs_select_fileserver(struct afs_operation *op)
* TODO: Retry a few times with sleeps.
*/
if (rcu_access_pointer(op->volume->servers) == op->server_list) {
- op->error = -ENOMEDIUM;
+ afs_op_accumulate_error(op, -ENOMEDIUM, abort_code);
goto failed;
}
goto restart_from_beginning;
+ case UAEIO:
+ case VIO:
+ afs_op_accumulate_error(op, -EREMOTEIO, abort_code);
+ if (op->volume->type != AFSVL_RWVOL)
+ goto next_server;
+ goto failed;
+
+ case VDISKFULL:
+ case UAENOSPC:
+ /* The partition is full. Only applies to RWVOLs.
+ * Translate locally and return ENOSPC.
+ * No replicas to failover to.
+ */
+ afs_op_set_error(op, -ENOSPC);
+ goto failed_but_online;
+
+ case VOVERQUOTA:
+ case UAEDQUOT:
+ /* Volume is full. Only applies to RWVOLs.
+ * Translate locally and return EDQUOT.
+ * No replicas to failover to.
+ */
+ afs_op_set_error(op, -EDQUOT);
+ goto failed_but_online;
+
default:
+ afs_op_accumulate_error(op, error, abort_code);
+ failed_but_online:
clear_bit(AFS_VOLUME_OFFLINE, &op->volume->flags);
clear_bit(AFS_VOLUME_BUSY, &op->volume->flags);
- op->error = afs_abort_to_error(op->ac.abort_code);
goto failed;
}
case -ETIMEDOUT:
case -ETIME:
- if (op->error != -EDESTADDRREQ)
+ if (afs_op_error(op) != -EDESTADDRREQ)
goto iterate_address;
fallthrough;
case -ERFKILL:
@@ -289,7 +383,7 @@ bool afs_select_fileserver(struct afs_operation *op)
case -EHOSTDOWN:
case -ECONNREFUSED:
_debug("no conn");
- op->error = error;
+ afs_op_accumulate_error(op, error, 0);
goto iterate_address;
case -ENETRESET:
@@ -298,7 +392,7 @@ bool afs_select_fileserver(struct afs_operation *op)
fallthrough;
case -ECONNRESET:
_debug("call reset");
- op->error = error;
+ afs_op_set_error(op, error);
goto failed;
}
@@ -314,8 +408,10 @@ start:
* volume may have moved or even have been deleted.
*/
error = afs_check_volume_status(op->volume, op);
- if (error < 0)
- goto failed_set_error;
+ if (error < 0) {
+ afs_op_set_error(op, error);
+ goto failed;
+ }
if (!afs_start_fs_iteration(op, vnode))
goto failed;
@@ -326,8 +422,10 @@ pick_server:
_debug("pick [%lx]", op->untried);
error = afs_wait_for_fs_probes(op->server_list, op->untried);
- if (error < 0)
- goto failed_set_error;
+ if (error < 0) {
+ afs_op_set_error(op, error);
+ goto failed;
+ }
/* Pick the untried server with the lowest RTT. If we have outstanding
* callbacks, we stick with the server we're already using if we can.
@@ -341,7 +439,7 @@ pick_server:
}
op->index = -1;
- rtt = U32_MAX;
+ rtt = UINT_MAX;
for (i = 0; i < op->server_list->nr_servers; i++) {
struct afs_server *s = op->server_list->servers[i].server;
@@ -409,8 +507,9 @@ iterate_address:
_debug("address [%u] %u/%u %pISp",
op->index, op->ac.index, op->ac.alist->nr_addrs,
- &op->ac.alist->addrs[op->ac.index].transport);
+ rxrpc_kernel_remote_addr(op->ac.alist->addrs[op->ac.index].peer));
+ op->call_responded = false;
_leave(" = t");
return true;
@@ -428,7 +527,8 @@ out_of_addresses:
op->flags &= ~AFS_OPERATION_RETRY_SERVER;
goto retry_server;
case -ERESTARTSYS:
- goto failed_set_error;
+ afs_op_set_error(op, error);
+ goto failed;
case -ETIME:
case -EDESTADDRREQ:
goto next_server;
@@ -447,23 +547,18 @@ no_more_servers:
if (op->flags & AFS_OPERATION_VBUSY)
goto restart_from_beginning;
- e.error = -EDESTADDRREQ;
- e.responded = false;
for (i = 0; i < op->server_list->nr_servers; i++) {
struct afs_server *s = op->server_list->servers[i].server;
- afs_prioritise_error(&e, READ_ONCE(s->probe.error),
- s->probe.abort_code);
+ error = READ_ONCE(s->probe.error);
+ if (error < 0)
+ afs_op_accumulate_error(op, error, s->probe.abort_code);
}
- error = e.error;
-
-failed_set_error:
- op->error = error;
failed:
op->flags |= AFS_OPERATION_STOP;
afs_end_cursor(&op->ac);
- _leave(" = f [failed %d]", op->error);
+ _leave(" = f [failed %d]", afs_op_error(op));
return false;
}
@@ -482,11 +577,13 @@ void afs_dump_edestaddrreq(const struct afs_operation *op)
rcu_read_lock();
pr_notice("EDESTADDR occurred\n");
- pr_notice("FC: cbb=%x cbb2=%x fl=%x err=%hd\n",
+ pr_notice("OP: cbb=%x cbb2=%x fl=%x err=%hd\n",
op->file[0].cb_break_before,
- op->file[1].cb_break_before, op->flags, op->error);
- pr_notice("FC: ut=%lx ix=%d ni=%u\n",
+ op->file[1].cb_break_before, op->flags, op->cumul_error.error);
+ pr_notice("OP: ut=%lx ix=%d ni=%u\n",
op->untried, op->index, op->nr_iterations);
+ pr_notice("OP: call er=%d ac=%d r=%u\n",
+ op->call_error, op->call_abort_code, op->call_responded);
if (op->server_list) {
const struct afs_server_list *sl = op->server_list;
@@ -511,8 +608,7 @@ void afs_dump_edestaddrreq(const struct afs_operation *op)
}
}
- pr_notice("AC: t=%lx ax=%u ac=%d er=%d r=%u ni=%u\n",
- op->ac.tried, op->ac.index, op->ac.abort_code, op->ac.error,
- op->ac.responded, op->ac.nr_iterations);
+ pr_notice("AC: t=%lx ax=%u ni=%u\n",
+ op->ac.tried, op->ac.index, op->ac.nr_iterations);
rcu_read_unlock();
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-16 10:02:53 +0000