lkml.org 
[lkml]   [2017]   [Sep]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: Linux 4.13.3
diff --git a/Documentation/ABI/testing/sysfs-bus-thunderbolt b/Documentation/ABI/testing/sysfs-bus-thunderbolt
index 2a98149943ea..392bef5bd399 100644
--- a/Documentation/ABI/testing/sysfs-bus-thunderbolt
+++ b/Documentation/ABI/testing/sysfs-bus-thunderbolt
@@ -45,6 +45,8 @@ Contact: thunderbolt-software@lists.01.org
Description: When a devices supports Thunderbolt secure connect it will
have this attribute. Writing 32 byte hex string changes
authorization to use the secure connection method instead.
+ Writing an empty string clears the key and regular connection
+ method can be used again.

What: /sys/bus/thunderbolt/devices/.../device
Date: Sep 2017
diff --git a/Makefile b/Makefile
index 8aad6bc50d52..0f31ef4aea7b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
VERSION = 4
PATCHLEVEL = 13
-SUBLEVEL = 2
+SUBLEVEL = 3
EXTRAVERSION =
NAME = Fearless Coyote

diff --git a/arch/x86/include/asm/elf.h b/arch/x86/include/asm/elf.h
index 9aeb91935ce0..e2c4dd051ef8 100644
--- a/arch/x86/include/asm/elf.h
+++ b/arch/x86/include/asm/elf.h
@@ -204,6 +204,7 @@ void set_personality_ia32(bool);

#define ELF_CORE_COPY_REGS(pr_reg, regs) \
do { \
+ unsigned long base; \
unsigned v; \
(pr_reg)[0] = (regs)->r15; \
(pr_reg)[1] = (regs)->r14; \
@@ -226,8 +227,8 @@ do { \
(pr_reg)[18] = (regs)->flags; \
(pr_reg)[19] = (regs)->sp; \
(pr_reg)[20] = (regs)->ss; \
- (pr_reg)[21] = current->thread.fsbase; \
- (pr_reg)[22] = current->thread.gsbase; \
+ rdmsrl(MSR_FS_BASE, base); (pr_reg)[21] = base; \
+ rdmsrl(MSR_KERNEL_GS_BASE, base); (pr_reg)[22] = base; \
asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \
asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \
asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \
diff --git a/arch/x86/include/asm/page_64.h b/arch/x86/include/asm/page_64.h
index b4a0d43248cf..b50df06ad251 100644
--- a/arch/x86/include/asm/page_64.h
+++ b/arch/x86/include/asm/page_64.h
@@ -51,6 +51,10 @@ static inline void clear_page(void *page)

void copy_page(void *to, void *from);

+#ifdef CONFIG_X86_MCE
+#define arch_unmap_kpfn arch_unmap_kpfn
+#endif
+
#endif /* !__ASSEMBLY__ */

#ifdef CONFIG_X86_VSYSCALL_EMULATION
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 6dde0497efc7..3b413065c613 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -51,6 +51,7 @@
#include <asm/mce.h>
#include <asm/msr.h>
#include <asm/reboot.h>
+#include <asm/set_memory.h>

#include "mce-internal.h"

@@ -1051,6 +1052,48 @@ static int do_memory_failure(struct mce *m)
return ret;
}

+#if defined(arch_unmap_kpfn) && defined(CONFIG_MEMORY_FAILURE)
+
+void arch_unmap_kpfn(unsigned long pfn)
+{
+ unsigned long decoy_addr;
+
+ /*
+ * Unmap this page from the kernel 1:1 mappings to make sure
+ * we don't log more errors because of speculative access to
+ * the page.
+ * We would like to just call:
+ * set_memory_np((unsigned long)pfn_to_kaddr(pfn), 1);
+ * but doing that would radically increase the odds of a
+ * speculative access to the posion page because we'd have
+ * the virtual address of the kernel 1:1 mapping sitting
+ * around in registers.
+ * Instead we get tricky. We create a non-canonical address
+ * that looks just like the one we want, but has bit 63 flipped.
+ * This relies on set_memory_np() not checking whether we passed
+ * a legal address.
+ */
+
+/*
+ * Build time check to see if we have a spare virtual bit. Don't want
+ * to leave this until run time because most developers don't have a
+ * system that can exercise this code path. This will only become a
+ * problem if/when we move beyond 5-level page tables.
+ *
+ * Hard code "9" here because cpp doesn't grok ilog2(PTRS_PER_PGD)
+ */
+#if PGDIR_SHIFT + 9 < 63
+ decoy_addr = (pfn << PAGE_SHIFT) + (PAGE_OFFSET ^ BIT(63));
+#else
+#error "no unused virtual bit available"
+#endif
+
+ if (set_memory_np(decoy_addr, 1))
+ pr_warn("Could not invalidate pfn=0x%lx from 1:1 map\n", pfn);
+
+}
+#endif
+
/*
* The actual machine check handler. This only handles real
* exceptions when something got corrupted coming in through int 18.
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index c3169be4c596..8c44e0cb2912 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -149,6 +149,123 @@ void release_thread(struct task_struct *dead_task)
}
}

+enum which_selector {
+ FS,
+ GS
+};
+
+/*
+ * Saves the FS or GS base for an outgoing thread if FSGSBASE extensions are
+ * not available. The goal is to be reasonably fast on non-FSGSBASE systems.
+ * It's forcibly inlined because it'll generate better code and this function
+ * is hot.
+ */
+static __always_inline void save_base_legacy(struct task_struct *prev_p,
+ unsigned short selector,
+ enum which_selector which)
+{
+ if (likely(selector == 0)) {
+ /*
+ * On Intel (without X86_BUG_NULL_SEG), the segment base could
+ * be the pre-existing saved base or it could be zero. On AMD
+ * (with X86_BUG_NULL_SEG), the segment base could be almost
+ * anything.
+ *
+ * This branch is very hot (it's hit twice on almost every
+ * context switch between 64-bit programs), and avoiding
+ * the RDMSR helps a lot, so we just assume that whatever
+ * value is already saved is correct. This matches historical
+ * Linux behavior, so it won't break existing applications.
+ *
+ * To avoid leaking state, on non-X86_BUG_NULL_SEG CPUs, if we
+ * report that the base is zero, it needs to actually be zero:
+ * see the corresponding logic in load_seg_legacy.
+ */
+ } else {
+ /*
+ * If the selector is 1, 2, or 3, then the base is zero on
+ * !X86_BUG_NULL_SEG CPUs and could be anything on
+ * X86_BUG_NULL_SEG CPUs. In the latter case, Linux
+ * has never attempted to preserve the base across context
+ * switches.
+ *
+ * If selector > 3, then it refers to a real segment, and
+ * saving the base isn't necessary.
+ */
+ if (which == FS)
+ prev_p->thread.fsbase = 0;
+ else
+ prev_p->thread.gsbase = 0;
+ }
+}
+
+static __always_inline void save_fsgs(struct task_struct *task)
+{
+ savesegment(fs, task->thread.fsindex);
+ savesegment(gs, task->thread.gsindex);
+ save_base_legacy(task, task->thread.fsindex, FS);
+ save_base_legacy(task, task->thread.gsindex, GS);
+}
+
+static __always_inline void loadseg(enum which_selector which,
+ unsigned short sel)
+{
+ if (which == FS)
+ loadsegment(fs, sel);
+ else
+ load_gs_index(sel);
+}
+
+static __always_inline void load_seg_legacy(unsigned short prev_index,
+ unsigned long prev_base,
+ unsigned short next_index,
+ unsigned long next_base,
+ enum which_selector which)
+{
+ if (likely(next_index <= 3)) {
+ /*
+ * The next task is using 64-bit TLS, is not using this
+ * segment at all, or is having fun with arcane CPU features.
+ */
+ if (next_base == 0) {
+ /*
+ * Nasty case: on AMD CPUs, we need to forcibly zero
+ * the base.
+ */
+ if (static_cpu_has_bug(X86_BUG_NULL_SEG)) {
+ loadseg(which, __USER_DS);
+ loadseg(which, next_index);
+ } else {
+ /*
+ * We could try to exhaustively detect cases
+ * under which we can skip the segment load,
+ * but there's really only one case that matters
+ * for performance: if both the previous and
+ * next states are fully zeroed, we can skip
+ * the load.
+ *
+ * (This assumes that prev_base == 0 has no
+ * false positives. This is the case on
+ * Intel-style CPUs.)
+ */
+ if (likely(prev_index | next_index | prev_base))
+ loadseg(which, next_index);
+ }
+ } else {
+ if (prev_index != next_index)
+ loadseg(which, next_index);
+ wrmsrl(which == FS ? MSR_FS_BASE : MSR_KERNEL_GS_BASE,
+ next_base);
+ }
+ } else {
+ /*
+ * The next task is using a real segment. Loading the selector
+ * is sufficient.
+ */
+ loadseg(which, next_index);
+ }
+}
+
int copy_thread_tls(unsigned long clone_flags, unsigned long sp,
unsigned long arg, struct task_struct *p, unsigned long tls)
{
@@ -229,10 +346,19 @@ start_thread_common(struct pt_regs *regs, unsigned long new_ip,
unsigned long new_sp,
unsigned int _cs, unsigned int _ss, unsigned int _ds)
{
+ WARN_ON_ONCE(regs != current_pt_regs());
+
+ if (static_cpu_has(X86_BUG_NULL_SEG)) {
+ /* Loading zero below won't clear the base. */
+ loadsegment(fs, __USER_DS);
+ load_gs_index(__USER_DS);
+ }
+
loadsegment(fs, 0);
loadsegment(es, _ds);
loadsegment(ds, _ds);
load_gs_index(0);
+
regs->ip = new_ip;
regs->sp = new_sp;
regs->cs = _cs;
@@ -277,7 +403,6 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
struct fpu *next_fpu = &next->fpu;
int cpu = smp_processor_id();
struct tss_struct *tss = &per_cpu(cpu_tss, cpu);
- unsigned prev_fsindex, prev_gsindex;

switch_fpu_prepare(prev_fpu, cpu);

@@ -286,8 +411,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
*
* (e.g. xen_load_tls())
*/
- savesegment(fs, prev_fsindex);
- savesegment(gs, prev_gsindex);
+ save_fsgs(prev_p);

/*
* Load TLS before restoring any segments so that segment loads
@@ -326,108 +450,10 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
if (unlikely(next->ds | prev->ds))
loadsegment(ds, next->ds);

- /*
- * Switch FS and GS.
- *
- * These are even more complicated than DS and ES: they have
- * 64-bit bases are that controlled by arch_prctl. The bases
- * don't necessarily match the selectors, as user code can do
- * any number of things to cause them to be inconsistent.
- *
- * We don't promise to preserve the bases if the selectors are
- * nonzero. We also don't promise to preserve the base if the
- * selector is zero and the base doesn't match whatever was
- * most recently passed to ARCH_SET_FS/GS. (If/when the
- * FSGSBASE instructions are enabled, we'll need to offer
- * stronger guarantees.)
- *
- * As an invariant,
- * (fsbase != 0 && fsindex != 0) || (gsbase != 0 && gsindex != 0) is
- * impossible.
- */
- if (next->fsindex) {
- /* Loading a nonzero value into FS sets the index and base. */
- loadsegment(fs, next->fsindex);
- } else {
- if (next->fsbase) {
- /* Next index is zero but next base is nonzero. */
- if (prev_fsindex)
- loadsegment(fs, 0);
- wrmsrl(MSR_FS_BASE, next->fsbase);
- } else {
- /* Next base and index are both zero. */
- if (static_cpu_has_bug(X86_BUG_NULL_SEG)) {
- /*
- * We don't know the previous base and can't
- * find out without RDMSR. Forcibly clear it.
- */
- loadsegment(fs, __USER_DS);
- loadsegment(fs, 0);
- } else {
- /*
- * If the previous index is zero and ARCH_SET_FS
- * didn't change the base, then the base is
- * also zero and we don't need to do anything.
- */
- if (prev->fsbase || prev_fsindex)
- loadsegment(fs, 0);
- }
- }
- }
- /*
- * Save the old state and preserve the invariant.
- * NB: if prev_fsindex == 0, then we can't reliably learn the base
- * without RDMSR because Intel user code can zero it without telling
- * us and AMD user code can program any 32-bit value without telling
- * us.
- */
- if (prev_fsindex)
- prev->fsbase = 0;
- prev->fsindex = prev_fsindex;
-
- if (next->gsindex) {
- /* Loading a nonzero value into GS sets the index and base. */
- load_gs_index(next->gsindex);
- } else {
- if (next->gsbase) {
- /* Next index is zero but next base is nonzero. */
- if (prev_gsindex)
- load_gs_index(0);
- wrmsrl(MSR_KERNEL_GS_BASE, next->gsbase);
- } else {
- /* Next base and index are both zero. */
- if (static_cpu_has_bug(X86_BUG_NULL_SEG)) {
- /*
- * We don't know the previous base and can't
- * find out without RDMSR. Forcibly clear it.
- *
- * This contains a pointless SWAPGS pair.
- * Fixing it would involve an explicit check
- * for Xen or a new pvop.
- */
- load_gs_index(__USER_DS);
- load_gs_index(0);
- } else {
- /*
- * If the previous index is zero and ARCH_SET_GS
- * didn't change the base, then the base is
- * also zero and we don't need to do anything.
- */
- if (prev->gsbase || prev_gsindex)
- load_gs_index(0);
- }
- }
- }
- /*
- * Save the old state and preserve the invariant.
- * NB: if prev_gsindex == 0, then we can't reliably learn the base
- * without RDMSR because Intel user code can zero it without telling
- * us and AMD user code can program any 32-bit value without telling
- * us.
- */
- if (prev_gsindex)
- prev->gsbase = 0;
- prev->gsindex = prev_gsindex;
+ load_seg_legacy(prev->fsindex, prev->fsbase,
+ next->fsindex, next->fsbase, FS);
+ load_seg_legacy(prev->gsindex, prev->gsbase,
+ next->gsindex, next->gsbase, GS);

switch_fpu_finish(next_fpu, cpu);

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index f50958ded9f0..79474f47eeef 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2564,6 +2564,23 @@ static int init_resync(struct r1conf *conf)
return 0;
}

+static struct r1bio *raid1_alloc_init_r1buf(struct r1conf *conf)
+{
+ struct r1bio *r1bio = mempool_alloc(conf->r1buf_pool, GFP_NOIO);
+ struct resync_pages *rps;
+ struct bio *bio;
+ int i;
+
+ for (i = conf->poolinfo->raid_disks; i--; ) {
+ bio = r1bio->bios[i];
+ rps = bio->bi_private;
+ bio_reset(bio);
+ bio->bi_private = rps;
+ }
+ r1bio->master_bio = NULL;
+ return r1bio;
+}
+
/*
* perform a "sync" on one "block"
*
@@ -2649,7 +2666,7 @@ static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,

bitmap_cond_end_sync(mddev->bitmap, sector_nr,
mddev_is_clustered(mddev) && (sector_nr + 2 * RESYNC_SECTORS > conf->cluster_sync_high));
- r1_bio = mempool_alloc(conf->r1buf_pool, GFP_NOIO);
+ r1_bio = raid1_alloc_init_r1buf(conf);

raise_barrier(conf, sector_nr);

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index f55d4cc085f6..d51ac02e98ef 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -2798,6 +2798,35 @@ static int init_resync(struct r10conf *conf)
return 0;
}

+static struct r10bio *raid10_alloc_init_r10buf(struct r10conf *conf)
+{
+ struct r10bio *r10bio = mempool_alloc(conf->r10buf_pool, GFP_NOIO);
+ struct rsync_pages *rp;
+ struct bio *bio;
+ int nalloc;
+ int i;
+
+ if (test_bit(MD_RECOVERY_SYNC, &conf->mddev->recovery) ||
+ test_bit(MD_RECOVERY_RESHAPE, &conf->mddev->recovery))
+ nalloc = conf->copies; /* resync */
+ else
+ nalloc = 2; /* recovery */
+
+ for (i = 0; i < nalloc; i++) {
+ bio = r10bio->devs[i].bio;
+ rp = bio->bi_private;
+ bio_reset(bio);
+ bio->bi_private = rp;
+ bio = r10bio->devs[i].repl_bio;
+ if (bio) {
+ rp = bio->bi_private;
+ bio_reset(bio);
+ bio->bi_private = rp;
+ }
+ }
+ return r10bio;
+}
+
/*
* perform a "sync" on one "block"
*
@@ -3027,7 +3056,7 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
atomic_inc(&mreplace->nr_pending);
rcu_read_unlock();

- r10_bio = mempool_alloc(conf->r10buf_pool, GFP_NOIO);
+ r10_bio = raid10_alloc_init_r10buf(conf);
r10_bio->state = 0;
raise_barrier(conf, rb2 != NULL);
atomic_set(&r10_bio->remaining, 0);
@@ -3236,7 +3265,7 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
}
if (sync_blocks < max_sync)
max_sync = sync_blocks;
- r10_bio = mempool_alloc(conf->r10buf_pool, GFP_NOIO);
+ r10_bio = raid10_alloc_init_r10buf(conf);
r10_bio->state = 0;

r10_bio->mddev = mddev;
@@ -4360,7 +4389,7 @@ static sector_t reshape_request(struct mddev *mddev, sector_t sector_nr,

read_more:
/* Now schedule reads for blocks from sector_nr to last */
- r10_bio = mempool_alloc(conf->r10buf_pool, GFP_NOIO);
+ r10_bio = raid10_alloc_init_r10buf(conf);
r10_bio->state = 0;
raise_barrier(conf, sectors_done != 0);
atomic_set(&r10_bio->remaining, 0);
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 0fc2748aaf95..e13a8ce7f589 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -6235,6 +6235,10 @@ static void raid5_do_work(struct work_struct *work)

spin_unlock_irq(&conf->device_lock);

+ flush_deferred_bios(conf);
+
+ r5l_flush_stripe_to_raid(conf->log);
+
async_tx_issue_pending_all();
blk_finish_plug(&plug);

diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c
index c4b4b0a1bbf0..5be52d89b182 100644
--- a/drivers/net/ethernet/freescale/gianfar.c
+++ b/drivers/net/ethernet/freescale/gianfar.c
@@ -3687,7 +3687,7 @@ static noinline void gfar_update_link_state(struct gfar_private *priv)
u32 tempval1 = gfar_read(&regs->maccfg1);
u32 tempval = gfar_read(&regs->maccfg2);
u32 ecntrl = gfar_read(&regs->ecntrl);
- u32 tx_flow_oldval = (tempval & MACCFG1_TX_FLOW);
+ u32 tx_flow_oldval = (tempval1 & MACCFG1_TX_FLOW);

if (phydev->duplex != priv->oldduplex) {
if (!(phydev->duplex))
diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c
index 14323faf8bd9..7ec6393b6ba1 100644
--- a/drivers/nvdimm/btt.c
+++ b/drivers/nvdimm/btt.c
@@ -1429,6 +1429,8 @@ int nvdimm_namespace_attach_btt(struct nd_namespace_common *ndns)
}

btt_sb = devm_kzalloc(&nd_btt->dev, sizeof(*btt_sb), GFP_KERNEL);
+ if (!btt_sb)
+ return -ENOMEM;

/*
* If this returns < 0, that is ok as it just means there wasn't
diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index 937fafa1886a..54eb14c7ef90 100644
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -905,19 +905,20 @@ static int __nd_ioctl(struct nvdimm_bus *nvdimm_bus, struct nvdimm *nvdimm,
int read_only, unsigned int ioctl_cmd, unsigned long arg)
{
struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
- size_t buf_len = 0, in_len = 0, out_len = 0;
static char out_env[ND_CMD_MAX_ENVELOPE];
static char in_env[ND_CMD_MAX_ENVELOPE];
const struct nd_cmd_desc *desc = NULL;
unsigned int cmd = _IOC_NR(ioctl_cmd);
- unsigned int func = cmd;
- void __user *p = (void __user *) arg;
struct device *dev = &nvdimm_bus->dev;
- struct nd_cmd_pkg pkg;
+ void __user *p = (void __user *) arg;
const char *cmd_name, *dimm_name;
+ u32 in_len = 0, out_len = 0;
+ unsigned int func = cmd;
unsigned long cmd_mask;
- void *buf;
+ struct nd_cmd_pkg pkg;
int rc, i, cmd_rc;
+ u64 buf_len = 0;
+ void *buf;

if (nvdimm) {
desc = nd_cmd_dimm_desc(cmd);
@@ -977,7 +978,7 @@ static int __nd_ioctl(struct nvdimm_bus *nvdimm_bus, struct nvdimm *nvdimm,

if (cmd == ND_CMD_CALL) {
func = pkg.nd_command;
- dev_dbg(dev, "%s:%s, idx: %llu, in: %zu, out: %zu, len %zu\n",
+ dev_dbg(dev, "%s:%s, idx: %llu, in: %u, out: %u, len %llu\n",
__func__, dimm_name, pkg.nd_command,
in_len, out_len, buf_len);

@@ -1007,9 +1008,9 @@ static int __nd_ioctl(struct nvdimm_bus *nvdimm_bus, struct nvdimm *nvdimm,
out_len += out_size;
}

- buf_len = out_len + in_len;
+ buf_len = (u64) out_len + (u64) in_len;
if (buf_len > ND_IOCTL_MAX_BUFLEN) {
- dev_dbg(dev, "%s:%s cmd: %s buf_len: %zu > %d\n", __func__,
+ dev_dbg(dev, "%s:%s cmd: %s buf_len: %llu > %d\n", __func__,
dimm_name, cmd_name, buf_len,
ND_IOCTL_MAX_BUFLEN);
return -EINVAL;
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index e9391bbd4036..53f40c57df59 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -807,11 +807,11 @@ static ssize_t key_store(struct device *dev, struct device_attribute *attr,
struct tb_switch *sw = tb_to_switch(dev);
u8 key[TB_SWITCH_KEY_SIZE];
ssize_t ret = count;
+ bool clear = false;

- if (count < 64)
- return -EINVAL;
-
- if (hex2bin(key, buf, sizeof(key)))
+ if (!strcmp(buf, "\n"))
+ clear = true;
+ else if (hex2bin(key, buf, sizeof(key)))
return -EINVAL;

if (mutex_lock_interruptible(&switch_lock))
@@ -821,15 +821,19 @@ static ssize_t key_store(struct device *dev, struct device_attribute *attr,
ret = -EBUSY;
} else {
kfree(sw->key);
- sw->key = kmemdup(key, sizeof(key), GFP_KERNEL);
- if (!sw->key)
- ret = -ENOMEM;
+ if (clear) {
+ sw->key = NULL;
+ } else {
+ sw->key = kmemdup(key, sizeof(key), GFP_KERNEL);
+ if (!sw->key)
+ ret = -ENOMEM;
+ }
}

mutex_unlock(&switch_lock);
return ret;
}
-static DEVICE_ATTR_RW(key);
+static DEVICE_ATTR(key, 0600, key_show, key_store);

static ssize_t nvm_authenticate_show(struct device *dev,
struct device_attribute *attr, char *buf)
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 06d044862e58..1c75572f5a3f 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -634,8 +634,13 @@ static int vhost_net_rx_peek_head_len(struct vhost_net *net, struct sock *sk)

preempt_enable();

- if (vhost_enable_notify(&net->dev, vq))
+ if (!vhost_vq_avail_empty(&net->dev, vq))
vhost_poll_queue(&vq->poll);
+ else if (unlikely(vhost_enable_notify(&net->dev, vq))) {
+ vhost_disable_notify(&net->dev, vq);
+ vhost_poll_queue(&vq->poll);
+ }
+
mutex_unlock(&vq->mutex);

len = peek_head_len(rvq, sk);
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 907d6b7dde6a..86d813a3f5d1 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -291,7 +291,7 @@ static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi,
return 0;

/* Get the previous summary */
- for (i = CURSEG_WARM_DATA; i <= CURSEG_COLD_DATA; i++) {
+ for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
struct curseg_info *curseg = CURSEG_I(sbi, i);
if (curseg->segno == segno) {
sum = curseg->sum_blk->entries[blkoff];
@@ -599,8 +599,6 @@ int recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only)
}

clear_sbi_flag(sbi, SBI_POR_DOING);
- if (err)
- set_ckpt_flags(sbi, CP_ERROR_FLAG);
mutex_unlock(&sbi->cp_mutex);

/* let's drop all the directory inodes for clean checkpoint */
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index c16d00e53264..13c65dd2d37d 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -1222,9 +1222,6 @@ static ssize_t fuse_dev_do_read(struct fuse_dev *fud, struct file *file,
struct fuse_in *in;
unsigned reqsize;

- if (task_active_pid_ns(current) != fc->pid_ns)
- return -EIO;
-
restart:
spin_lock(&fiq->waitq.lock);
err = -EAGAIN;
@@ -1262,6 +1259,13 @@ static ssize_t fuse_dev_do_read(struct fuse_dev *fud, struct file *file,

in = &req->in;
reqsize = in->h.len;
+
+ if (task_active_pid_ns(current) != fc->pid_ns) {
+ rcu_read_lock();
+ in->h.pid = pid_vnr(find_pid_ns(in->h.pid, fc->pid_ns));
+ rcu_read_unlock();
+ }
+
/* If request is too large, reply with an error and restart the read */
if (nbytes < reqsize) {
req->out.h.error = -EIO;
@@ -1823,9 +1827,6 @@ static ssize_t fuse_dev_do_write(struct fuse_dev *fud,
struct fuse_req *req;
struct fuse_out_header oh;

- if (task_active_pid_ns(current) != fc->pid_ns)
- return -EIO;
-
if (nbytes < sizeof(struct fuse_out_header))
return -EINVAL;

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index ab60051be6e5..6d8e65cec01a 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -2181,9 +2181,6 @@ static int fuse_setlk(struct file *file, struct file_lock *fl, int flock)
if ((fl->fl_flags & FL_CLOSE_POSIX) == FL_CLOSE_POSIX)
return 0;

- if (pid && pid_nr == 0)
- return -EOVERFLOW;
-
fuse_lk_fill(&args, file, fl, opcode, pid_nr, flock, &inarg);
err = fuse_simple_request(fc, &args);

diff --git a/fs/inode.c b/fs/inode.c
index 50370599e371..6a1626e0edaf 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -637,6 +637,7 @@ void evict_inodes(struct super_block *sb)

dispose_list(&dispose);
}
+EXPORT_SYMBOL_GPL(evict_inodes);

/**
* invalidate_inodes - attempt to free all inodes on a superblock
diff --git a/fs/internal.h b/fs/internal.h
index 9676fe11c093..fedfe94d84ba 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -132,7 +132,6 @@ static inline bool atime_needs_update_rcu(const struct path *path,
extern void inode_io_list_del(struct inode *inode);

extern long get_nr_dirty_inodes(void);
-extern void evict_inodes(struct super_block *);
extern int invalidate_inodes(struct super_block *, bool);

/*
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 5bc71642b226..ef55c926463c 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -576,10 +576,13 @@ static int ovl_inode_set(struct inode *inode, void *data)
static bool ovl_verify_inode(struct inode *inode, struct dentry *lowerdentry,
struct dentry *upperdentry)
{
- struct inode *lowerinode = lowerdentry ? d_inode(lowerdentry) : NULL;
-
- /* Lower (origin) inode must match, even if NULL */
- if (ovl_inode_lower(inode) != lowerinode)
+ /*
+ * Allow non-NULL lower inode in ovl_inode even if lowerdentry is NULL.
+ * This happens when finding a copied up overlay inode for a renamed
+ * or hardlinked overlay dentry and lower dentry cannot be followed
+ * by origin because lower fs does not support file handles.
+ */
+ if (lowerdentry && ovl_inode_lower(inode) != d_inode(lowerdentry))
return false;

/*
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index c09c16b1ad3b..6f2a5baded76 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -579,7 +579,7 @@ xfs_bmap_validate_ret(

#else
#define xfs_bmap_check_leaf_extents(cur, ip, whichfork) do { } while (0)
-#define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap)
+#define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap) do { } while (0)
#endif /* DEBUG */

/*
diff --git a/fs/xfs/libxfs/xfs_bmap_btree.c b/fs/xfs/libxfs/xfs_bmap_btree.c
index 85de22513014..a6331ffa51e3 100644
--- a/fs/xfs/libxfs/xfs_bmap_btree.c
+++ b/fs/xfs/libxfs/xfs_bmap_btree.c
@@ -858,6 +858,7 @@ xfs_bmbt_change_owner(
cur = xfs_bmbt_init_cursor(ip->i_mount, tp, ip, whichfork);
if (!cur)
return -ENOMEM;
+ cur->bc_private.b.flags |= XFS_BTCUR_BPRV_INVALID_OWNER;

error = xfs_btree_change_owner(cur, new_owner, buffer_list);
xfs_btree_del_cursor(cur, error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c
index e0bcc4a59efd..5bfb88261c7e 100644
--- a/fs/xfs/libxfs/xfs_btree.c
+++ b/fs/xfs/libxfs/xfs_btree.c
@@ -1791,6 +1791,7 @@ xfs_btree_lookup_get_block(

/* Check the inode owner since the verifiers don't. */
if (xfs_sb_version_hascrc(&cur->bc_mp->m_sb) &&
+ !(cur->bc_private.b.flags & XFS_BTCUR_BPRV_INVALID_OWNER) &&
(cur->bc_flags & XFS_BTREE_LONG_PTRS) &&
be64_to_cpu((*blkp)->bb_u.l.bb_owner) !=
cur->bc_private.b.ip->i_ino)
@@ -4451,10 +4452,15 @@ xfs_btree_block_change_owner(

/* modify the owner */
block = xfs_btree_get_block(cur, level, &bp);
- if (cur->bc_flags & XFS_BTREE_LONG_PTRS)
+ if (cur->bc_flags & XFS_BTREE_LONG_PTRS) {
+ if (block->bb_u.l.bb_owner == cpu_to_be64(bbcoi->new_owner))
+ return 0;
block->bb_u.l.bb_owner = cpu_to_be64(bbcoi->new_owner);
- else
+ } else {
+ if (block->bb_u.s.bb_owner == cpu_to_be32(bbcoi->new_owner))
+ return 0;
block->bb_u.s.bb_owner = cpu_to_be32(bbcoi->new_owner);
+ }

/*
* If the block is a root block hosted in an inode, we might not have a
@@ -4463,16 +4469,19 @@ xfs_btree_block_change_owner(
* block is formatted into the on-disk inode fork. We still change it,
* though, so everything is consistent in memory.
*/
- if (bp) {
- if (cur->bc_tp) {
- xfs_trans_ordered_buf(cur->bc_tp, bp);
+ if (!bp) {
+ ASSERT(cur->bc_flags & XFS_BTREE_ROOT_IN_INODE);
+ ASSERT(level == cur->bc_nlevels - 1);
+ return 0;
+ }
+
+ if (cur->bc_tp) {
+ if (!xfs_trans_ordered_buf(cur->bc_tp, bp)) {
xfs_btree_log_block(cur, bp, XFS_BB_OWNER);
- } else {
- xfs_buf_delwri_queue(bp, bbcoi->buffer_list);
+ return -EAGAIN;
}
} else {
- ASSERT(cur->bc_flags & XFS_BTREE_ROOT_IN_INODE);
- ASSERT(level == cur->bc_nlevels - 1);
+ xfs_buf_delwri_queue(bp, bbcoi->buffer_list);
}

return 0;
diff --git a/fs/xfs/libxfs/xfs_btree.h b/fs/xfs/libxfs/xfs_btree.h
index 9c95e965cfe5..f2a88c3b1159 100644
--- a/fs/xfs/libxfs/xfs_btree.h
+++ b/fs/xfs/libxfs/xfs_btree.h
@@ -233,7 +233,8 @@ typedef struct xfs_btree_cur
short forksize; /* fork's inode space */
char whichfork; /* data or attr fork */
char flags; /* flags */
-#define XFS_BTCUR_BPRV_WASDEL 1 /* was delayed */
+#define XFS_BTCUR_BPRV_WASDEL (1<<0) /* was delayed */
+#define XFS_BTCUR_BPRV_INVALID_OWNER (1<<1) /* for ext swap */
} b;
} bc_private; /* per-btree type data */
} xfs_btree_cur_t;
diff --git a/fs/xfs/libxfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c
index abf5beaae907..988bb3f31446 100644
--- a/fs/xfs/libxfs/xfs_ialloc.c
+++ b/fs/xfs/libxfs/xfs_ialloc.c
@@ -378,8 +378,6 @@ xfs_ialloc_inode_init(
* transaction and pin the log appropriately.
*/
xfs_trans_ordered_buf(tp, fbuf);
- xfs_trans_log_buf(tp, fbuf, 0,
- BBTOB(fbuf->b_length) - 1);
}
} else {
fbuf->b_flags |= XBF_DONE;
@@ -1133,6 +1131,7 @@ xfs_dialloc_ag_inobt(
int error;
int offset;
int i, j;
+ int searchdistance = 10;

pag = xfs_perag_get(mp, agno);

@@ -1159,7 +1158,6 @@ xfs_dialloc_ag_inobt(
if (pagno == agno) {
int doneleft; /* done, to the left */
int doneright; /* done, to the right */
- int searchdistance = 10;

error = xfs_inobt_lookup(cur, pagino, XFS_LOOKUP_LE, &i);
if (error)
@@ -1220,21 +1218,9 @@ xfs_dialloc_ag_inobt(
/*
* Loop until we find an inode chunk with a free inode.
*/
- while (!doneleft || !doneright) {
+ while (--searchdistance > 0 && (!doneleft || !doneright)) {
int useleft; /* using left inode chunk this time */

- if (!--searchdistance) {
- /*
- * Not in range - save last search
- * location and allocate a new inode
- */
- xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
- pag->pagl_leftrec = trec.ir_startino;
- pag->pagl_rightrec = rec.ir_startino;
- pag->pagl_pagino = pagino;
- goto newino;
- }
-
/* figure out the closer block if both are valid. */
if (!doneleft && !doneright) {
useleft = pagino -
@@ -1278,26 +1264,37 @@ xfs_dialloc_ag_inobt(
goto error1;
}

- /*
- * We've reached the end of the btree. because
- * we are only searching a small chunk of the
- * btree each search, there is obviously free
- * inodes closer to the parent inode than we
- * are now. restart the search again.
- */
- pag->pagl_pagino = NULLAGINO;
- pag->pagl_leftrec = NULLAGINO;
- pag->pagl_rightrec = NULLAGINO;
- xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
- xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
- goto restart_pagno;
+ if (searchdistance <= 0) {
+ /*
+ * Not in range - save last search
+ * location and allocate a new inode
+ */
+ xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
+ pag->pagl_leftrec = trec.ir_startino;
+ pag->pagl_rightrec = rec.ir_startino;
+ pag->pagl_pagino = pagino;
+
+ } else {
+ /*
+ * We've reached the end of the btree. because
+ * we are only searching a small chunk of the
+ * btree each search, there is obviously free
+ * inodes closer to the parent inode than we
+ * are now. restart the search again.
+ */
+ pag->pagl_pagino = NULLAGINO;
+ pag->pagl_leftrec = NULLAGINO;
+ pag->pagl_rightrec = NULLAGINO;
+ xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
+ xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
+ goto restart_pagno;
+ }
}

/*
* In a different AG from the parent.
* See if the most recently allocated block has any free.
*/
-newino:
if (agi->agi_newino != cpu_to_be32(NULLAGINO)) {
error = xfs_inobt_lookup(cur, be32_to_cpu(agi->agi_newino),
XFS_LOOKUP_EQ, &i);
diff --git a/fs/xfs/libxfs/xfs_inode_fork.c b/fs/xfs/libxfs/xfs_inode_fork.c
index 0e80f34fe97c..5eb165555934 100644
--- a/fs/xfs/libxfs/xfs_inode_fork.c
+++ b/fs/xfs/libxfs/xfs_inode_fork.c
@@ -1499,14 +1499,11 @@ xfs_iext_realloc_indirect(
xfs_ifork_t *ifp, /* inode fork pointer */
int new_size) /* new indirection array size */
{
- int nlists; /* number of irec's (ex lists) */
- int size; /* current indirection array size */
-
ASSERT(ifp->if_flags & XFS_IFEXTIREC);
- nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ;
- size = nlists * sizeof(xfs_ext_irec_t);
ASSERT(ifp->if_real_bytes);
- ASSERT((new_size >= 0) && (new_size != size));
+ ASSERT((new_size >= 0) &&
+ (new_size != ((ifp->if_real_bytes / XFS_IEXT_BUFSZ) *
+ sizeof(xfs_ext_irec_t))));
if (new_size == 0) {
xfs_iext_destroy(ifp);
} else {
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index 6bf120bb1a17..f9efd67f6fa1 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -85,11 +85,11 @@ xfs_find_bdev_for_inode(
* associated buffer_heads, paying attention to the start and end offsets that
* we need to process on the page.
*
- * Landmine Warning: bh->b_end_io() will call end_page_writeback() on the last
- * buffer in the IO. Once it does this, it is unsafe to access the bufferhead or
- * the page at all, as we may be racing with memory reclaim and it can free both
- * the bufferhead chain and the page as it will see the page as clean and
- * unused.
+ * Note that we open code the action in end_buffer_async_write here so that we
+ * only have to iterate over the buffers attached to the page once. This is not
+ * only more efficient, but also ensures that we only calls end_page_writeback
+ * at the end of the iteration, and thus avoids the pitfall of having the page
+ * and buffers potentially freed after every call to end_buffer_async_write.
*/
static void
xfs_finish_page_writeback(
@@ -97,29 +97,44 @@ xfs_finish_page_writeback(
struct bio_vec *bvec,
int error)
{
- unsigned int end = bvec->bv_offset + bvec->bv_len - 1;
- struct buffer_head *head, *bh, *next;
+ struct buffer_head *head = page_buffers(bvec->bv_page), *bh = head;
+ bool busy = false;
unsigned int off = 0;
- unsigned int bsize;
+ unsigned long flags;

ASSERT(bvec->bv_offset < PAGE_SIZE);
ASSERT((bvec->bv_offset & (i_blocksize(inode) - 1)) == 0);
- ASSERT(end < PAGE_SIZE);
+ ASSERT(bvec->bv_offset + bvec->bv_len <= PAGE_SIZE);
ASSERT((bvec->bv_len & (i_blocksize(inode) - 1)) == 0);

- bh = head = page_buffers(bvec->bv_page);
-
- bsize = bh->b_size;
+ local_irq_save(flags);
+ bit_spin_lock(BH_Uptodate_Lock, &head->b_state);
do {
- if (off > end)
- break;
- next = bh->b_this_page;
- if (off < bvec->bv_offset)
- goto next_bh;
- bh->b_end_io(bh, !error);
-next_bh:
- off += bsize;
- } while ((bh = next) != head);
+ if (off >= bvec->bv_offset &&
+ off < bvec->bv_offset + bvec->bv_len) {
+ ASSERT(buffer_async_write(bh));
+ ASSERT(bh->b_end_io == NULL);
+
+ if (error) {
+ mark_buffer_write_io_error(bh);
+ clear_buffer_uptodate(bh);
+ SetPageError(bvec->bv_page);
+ } else {
+ set_buffer_uptodate(bh);
+ }
+ clear_buffer_async_write(bh);
+ unlock_buffer(bh);
+ } else if (buffer_async_write(bh)) {
+ ASSERT(buffer_locked(bh));
+ busy = true;
+ }
+ off += bh->b_size;
+ } while ((bh = bh->b_this_page) != head);
+ bit_spin_unlock(BH_Uptodate_Lock, &head->b_state);
+ local_irq_restore(flags);
+
+ if (!busy)
+ end_page_writeback(bvec->bv_page);
}

/*
@@ -133,8 +148,10 @@ xfs_destroy_ioend(
int error)
{
struct inode *inode = ioend->io_inode;
- struct bio *last = ioend->io_bio;
- struct bio *bio, *next;
+ struct bio *bio = &ioend->io_inline_bio;
+ struct bio *last = ioend->io_bio, *next;
+ u64 start = bio->bi_iter.bi_sector;
+ bool quiet = bio_flagged(bio, BIO_QUIET);

for (bio = &ioend->io_inline_bio; bio; bio = next) {
struct bio_vec *bvec;
@@ -155,6 +172,11 @@ xfs_destroy_ioend(

bio_put(bio);
}
+
+ if (unlikely(error && !quiet)) {
+ xfs_err_ratelimited(XFS_I(inode)->i_mount,
+ "writeback error on sector %llu", start);
+ }
}

/*
@@ -423,7 +445,8 @@ xfs_start_buffer_writeback(
ASSERT(!buffer_delay(bh));
ASSERT(!buffer_unwritten(bh));

- mark_buffer_async_write(bh);
+ bh->b_end_io = NULL;
+ set_buffer_async_write(bh);
set_buffer_uptodate(bh);
clear_buffer_dirty(bh);
}
diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index 93e955262d07..3e9b7a4fb8fd 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -1840,29 +1840,18 @@ xfs_swap_extent_forks(
}

/*
- * Before we've swapped the forks, lets set the owners of the forks
- * appropriately. We have to do this as we are demand paging the btree
- * buffers, and so the validation done on read will expect the owner
- * field to be correctly set. Once we change the owners, we can swap the
- * inode forks.
+ * Btree format (v3) inodes have the inode number stamped in the bmbt
+ * block headers. We can't start changing the bmbt blocks until the
+ * inode owner change is logged so recovery does the right thing in the
+ * event of a crash. Set the owner change log flags now and leave the
+ * bmbt scan as the last step.
*/
if (ip->i_d.di_version == 3 &&
- ip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
+ ip->i_d.di_format == XFS_DINODE_FMT_BTREE)
(*target_log_flags) |= XFS_ILOG_DOWNER;
- error = xfs_bmbt_change_owner(tp, ip, XFS_DATA_FORK,
- tip->i_ino, NULL);
- if (error)
- return error;
- }
-
if (tip->i_d.di_version == 3 &&
- tip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
+ tip->i_d.di_format == XFS_DINODE_FMT_BTREE)
(*src_log_flags) |= XFS_ILOG_DOWNER;
- error = xfs_bmbt_change_owner(tp, tip, XFS_DATA_FORK,
- ip->i_ino, NULL);
- if (error)
- return error;
- }

/*
* Swap the data forks of the inodes
@@ -1940,6 +1929,48 @@ xfs_swap_extent_forks(
return 0;
}

+/*
+ * Fix up the owners of the bmbt blocks to refer to the current inode. The
+ * change owner scan attempts to order all modified buffers in the current
+ * transaction. In the event of ordered buffer failure, the offending buffer is
+ * physically logged as a fallback and the scan returns -EAGAIN. We must roll
+ * the transaction in this case to replenish the fallback log reservation and
+ * restart the scan. This process repeats until the scan completes.
+ */
+static int
+xfs_swap_change_owner(
+ struct xfs_trans **tpp,
+ struct xfs_inode *ip,
+ struct xfs_inode *tmpip)
+{
+ int error;
+ struct xfs_trans *tp = *tpp;
+
+ do {
+ error = xfs_bmbt_change_owner(tp, ip, XFS_DATA_FORK, ip->i_ino,
+ NULL);
+ /* success or fatal error */
+ if (error != -EAGAIN)
+ break;
+
+ error = xfs_trans_roll(tpp, NULL);
+ if (error)
+ break;
+ tp = *tpp;
+
+ /*
+ * Redirty both inodes so they can relog and keep the log tail
+ * moving forward.
+ */
+ xfs_trans_ijoin(tp, ip, 0);
+ xfs_trans_ijoin(tp, tmpip, 0);
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+ xfs_trans_log_inode(tp, tmpip, XFS_ILOG_CORE);
+ } while (true);
+
+ return error;
+}
+
int
xfs_swap_extents(
struct xfs_inode *ip, /* target inode */
@@ -1954,7 +1985,7 @@ xfs_swap_extents(
int lock_flags;
struct xfs_ifork *cowfp;
uint64_t f;
- int resblks;
+ int resblks = 0;

/*
* Lock the inodes against other IO, page faults and truncate to
@@ -2002,11 +2033,8 @@ xfs_swap_extents(
XFS_SWAP_RMAP_SPACE_RES(mp,
XFS_IFORK_NEXTENTS(tip, XFS_DATA_FORK),
XFS_DATA_FORK);
- error = xfs_trans_alloc(mp, &M_RES(mp)->tr_write, resblks,
- 0, 0, &tp);
- } else
- error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0,
- 0, 0, &tp);
+ }
+ error = xfs_trans_alloc(mp, &M_RES(mp)->tr_write, resblks, 0, 0, &tp);
if (error)
goto out_unlock;

@@ -2091,6 +2119,23 @@ xfs_swap_extents(
xfs_trans_log_inode(tp, ip, src_log_flags);
xfs_trans_log_inode(tp, tip, target_log_flags);

+ /*
+ * The extent forks have been swapped, but crc=1,rmapbt=0 filesystems
+ * have inode number owner values in the bmbt blocks that still refer to
+ * the old inode. Scan each bmbt to fix up the owner values with the
+ * inode number of the current inode.
+ */
+ if (src_log_flags & XFS_ILOG_DOWNER) {
+ error = xfs_swap_change_owner(&tp, ip, tip);
+ if (error)
+ goto out_trans_cancel;
+ }
+ if (target_log_flags & XFS_ILOG_DOWNER) {
+ error = xfs_swap_change_owner(&tp, tip, ip);
+ if (error)
+ goto out_trans_cancel;
+ }
+
/*
* If this is a synchronous mount, make sure that the
* transaction goes to disk before returning to the user.
diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c
index f6a8422e9562..e0a0af0946f2 100644
--- a/fs/xfs/xfs_buf_item.c
+++ b/fs/xfs/xfs_buf_item.c
@@ -29,6 +29,7 @@
#include "xfs_error.h"
#include "xfs_trace.h"
#include "xfs_log.h"
+#include "xfs_inode.h"


kmem_zone_t *xfs_buf_item_zone;
@@ -322,6 +323,8 @@ xfs_buf_item_format(
ASSERT((bip->bli_flags & XFS_BLI_STALE) ||
(xfs_blft_from_flags(&bip->__bli_format) > XFS_BLFT_UNKNOWN_BUF
&& xfs_blft_from_flags(&bip->__bli_format) < XFS_BLFT_MAX_BUF));
+ ASSERT(!(bip->bli_flags & XFS_BLI_ORDERED) ||
+ (bip->bli_flags & XFS_BLI_STALE));


/*
@@ -346,16 +349,6 @@ xfs_buf_item_format(
bip->bli_flags &= ~XFS_BLI_INODE_BUF;
}

- if ((bip->bli_flags & (XFS_BLI_ORDERED|XFS_BLI_STALE)) ==
- XFS_BLI_ORDERED) {
- /*
- * The buffer has been logged just to order it. It is not being
- * included in the transaction commit, so don't format it.
- */
- trace_xfs_buf_item_format_ordered(bip);
- return;
- }
-
for (i = 0; i < bip->bli_format_count; i++) {
xfs_buf_item_format_segment(bip, lv, &vecp, offset,
&bip->bli_formats[i]);
@@ -574,26 +567,20 @@ xfs_buf_item_unlock(
{
struct xfs_buf_log_item *bip = BUF_ITEM(lip);
struct xfs_buf *bp = bip->bli_buf;
- bool clean;
- bool aborted;
- int flags;
+ bool aborted = !!(lip->li_flags & XFS_LI_ABORTED);
+ bool hold = !!(bip->bli_flags & XFS_BLI_HOLD);
+ bool dirty = !!(bip->bli_flags & XFS_BLI_DIRTY);
+#if defined(DEBUG) || defined(XFS_WARN)
+ bool ordered = !!(bip->bli_flags & XFS_BLI_ORDERED);
+#endif

/* Clear the buffer's association with this transaction. */
bp->b_transp = NULL;

/*
- * If this is a transaction abort, don't return early. Instead, allow
- * the brelse to happen. Normally it would be done for stale
- * (cancelled) buffers at unpin time, but we'll never go through the
- * pin/unpin cycle if we abort inside commit.
+ * The per-transaction state has been copied above so clear it from the
+ * bli.
*/
- aborted = (lip->li_flags & XFS_LI_ABORTED) ? true : false;
- /*
- * Before possibly freeing the buf item, copy the per-transaction state
- * so we can reference it safely later after clearing it from the
- * buffer log item.
- */
- flags = bip->bli_flags;
bip->bli_flags &= ~(XFS_BLI_LOGGED | XFS_BLI_HOLD | XFS_BLI_ORDERED);

/*
@@ -601,7 +588,7 @@ xfs_buf_item_unlock(
* unlock the buffer and free the buf item when the buffer is unpinned
* for the last time.
*/
- if (flags & XFS_BLI_STALE) {
+ if (bip->bli_flags & XFS_BLI_STALE) {
trace_xfs_buf_item_unlock_stale(bip);
ASSERT(bip->__bli_format.blf_flags & XFS_BLF_CANCEL);
if (!aborted) {
@@ -619,20 +606,11 @@ xfs_buf_item_unlock(
* regardless of whether it is dirty or not. A dirty abort implies a
* shutdown, anyway.
*
- * Ordered buffers are dirty but may have no recorded changes, so ensure
- * we only release clean items here.
+ * The bli dirty state should match whether the blf has logged segments
+ * except for ordered buffers, where only the bli should be dirty.
*/
- clean = (flags & XFS_BLI_DIRTY) ? false : true;
- if (clean) {
- int i;
- for (i = 0; i < bip->bli_format_count; i++) {
- if (!xfs_bitmap_empty(bip->bli_formats[i].blf_data_map,
- bip->bli_formats[i].blf_map_size)) {
- clean = false;
- break;
- }
- }
- }
+ ASSERT((!ordered && dirty == xfs_buf_item_dirty_format(bip)) ||
+ (ordered && dirty && !xfs_buf_item_dirty_format(bip)));

/*
* Clean buffers, by definition, cannot be in the AIL. However, aborted
@@ -651,11 +629,11 @@ xfs_buf_item_unlock(
ASSERT(XFS_FORCED_SHUTDOWN(lip->li_mountp));
xfs_trans_ail_remove(lip, SHUTDOWN_LOG_IO_ERROR);
xfs_buf_item_relse(bp);
- } else if (clean)
+ } else if (!dirty)
xfs_buf_item_relse(bp);
}

- if (!(flags & XFS_BLI_HOLD))
+ if (!hold)
xfs_buf_relse(bp);
}

@@ -945,14 +923,22 @@ xfs_buf_item_log(


/*
- * Return 1 if the buffer has been logged or ordered in a transaction (at any
- * point, not just the current transaction) and 0 if not.
+ * Return true if the buffer has any ranges logged/dirtied by a transaction,
+ * false otherwise.
*/
-uint
-xfs_buf_item_dirty(
- xfs_buf_log_item_t *bip)
+bool
+xfs_buf_item_dirty_format(
+ struct xfs_buf_log_item *bip)
{
- return (bip->bli_flags & XFS_BLI_DIRTY);
+ int i;
+
+ for (i = 0; i < bip->bli_format_count; i++) {
+ if (!xfs_bitmap_empty(bip->bli_formats[i].blf_data_map,
+ bip->bli_formats[i].blf_map_size))
+ return true;
+ }
+
+ return false;
}

STATIC void
@@ -1054,6 +1040,31 @@ xfs_buf_do_callbacks(
}
}

+/*
+ * Invoke the error state callback for each log item affected by the failed I/O.
+ *
+ * If a metadata buffer write fails with a non-permanent error, the buffer is
+ * eventually resubmitted and so the completion callbacks are not run. The error
+ * state may need to be propagated to the log items attached to the buffer,
+ * however, so the next AIL push of the item knows hot to handle it correctly.
+ */
+STATIC void
+xfs_buf_do_callbacks_fail(
+ struct xfs_buf *bp)
+{
+ struct xfs_log_item *next;
+ struct xfs_log_item *lip = bp->b_fspriv;
+ struct xfs_ail *ailp = lip->li_ailp;
+
+ spin_lock(&ailp->xa_lock);
+ for (; lip; lip = next) {
+ next = lip->li_bio_list;
+ if (lip->li_ops->iop_error)
+ lip->li_ops->iop_error(lip, bp);
+ }
+ spin_unlock(&ailp->xa_lock);
+}
+
static bool
xfs_buf_iodone_callback_error(
struct xfs_buf *bp)
@@ -1123,7 +1134,11 @@ xfs_buf_iodone_callback_error(
if ((mp->m_flags & XFS_MOUNT_UNMOUNTING) && mp->m_fail_unmount)
goto permanent_error;

- /* still a transient error, higher layers will retry */
+ /*
+ * Still a transient error, run IO completion failure callbacks and let
+ * the higher layers retry the buffer.
+ */
+ xfs_buf_do_callbacks_fail(bp);
xfs_buf_ioerror(bp, 0);
xfs_buf_relse(bp);
return true;
@@ -1204,3 +1219,31 @@ xfs_buf_iodone(
xfs_trans_ail_delete(ailp, lip, SHUTDOWN_CORRUPT_INCORE);
xfs_buf_item_free(BUF_ITEM(lip));
}
+
+/*
+ * Requeue a failed buffer for writeback
+ *
+ * Return true if the buffer has been re-queued properly, false otherwise
+ */
+bool
+xfs_buf_resubmit_failed_buffers(
+ struct xfs_buf *bp,
+ struct xfs_log_item *lip,
+ struct list_head *buffer_list)
+{
+ struct xfs_log_item *next;
+
+ /*
+ * Clear XFS_LI_FAILED flag from all items before resubmit
+ *
+ * XFS_LI_FAILED set/clear is protected by xa_lock, caller this
+ * function already have it acquired
+ */
+ for (; lip; lip = next) {
+ next = lip->li_bio_list;
+ xfs_clear_li_failed(lip);
+ }
+
+ /* Add this buffer back to the delayed write list */
+ return xfs_buf_delwri_queue(bp, buffer_list);
+}
diff --git a/fs/xfs/xfs_buf_item.h b/fs/xfs/xfs_buf_item.h
index f7eba99d19dd..9690ce62c9a7 100644
--- a/fs/xfs/xfs_buf_item.h
+++ b/fs/xfs/xfs_buf_item.h
@@ -64,12 +64,15 @@ typedef struct xfs_buf_log_item {
int xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *);
void xfs_buf_item_relse(struct xfs_buf *);
void xfs_buf_item_log(xfs_buf_log_item_t *, uint, uint);
-uint xfs_buf_item_dirty(xfs_buf_log_item_t *);
+bool xfs_buf_item_dirty_format(struct xfs_buf_log_item *);
void xfs_buf_attach_iodone(struct xfs_buf *,
void(*)(struct xfs_buf *, xfs_log_item_t *),
xfs_log_item_t *);
void xfs_buf_iodone_callbacks(struct xfs_buf *);
void xfs_buf_iodone(struct xfs_buf *, struct xfs_log_item *);
+bool xfs_buf_resubmit_failed_buffers(struct xfs_buf *,
+ struct xfs_log_item *,
+ struct list_head *);

extern kmem_zone_t *xfs_buf_item_zone;

diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index 0a9e6985a0d0..34227115a5d6 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -1124,11 +1124,11 @@ xfs_reclaim_inode(
* Because we use RCU freeing we need to ensure the inode always appears
* to be reclaimed with an invalid inode number when in the free state.
* We do this as early as possible under the ILOCK so that
- * xfs_iflush_cluster() can be guaranteed to detect races with us here.
- * By doing this, we guarantee that once xfs_iflush_cluster has locked
- * XFS_ILOCK that it will see either a valid, flushable inode that will
- * serialise correctly, or it will see a clean (and invalid) inode that
- * it can skip.
+ * xfs_iflush_cluster() and xfs_ifree_cluster() can be guaranteed to
+ * detect races with us here. By doing this, we guarantee that once
+ * xfs_iflush_cluster() or xfs_ifree_cluster() has locked XFS_ILOCK that
+ * it will see either a valid inode that will serialise correctly, or it
+ * will see an invalid inode that it can skip.
*/
spin_lock(&ip->i_flags_lock);
ip->i_flags = XFS_IRECLAIM;
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index ff48f0096810..97045e8dfed5 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -2359,11 +2359,24 @@ xfs_ifree_cluster(
* already marked stale. If we can't lock it, back off
* and retry.
*/
- if (ip != free_ip &&
- !xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) {
- rcu_read_unlock();
- delay(1);
- goto retry;
+ if (ip != free_ip) {
+ if (!xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) {
+ rcu_read_unlock();
+ delay(1);
+ goto retry;
+ }
+
+ /*
+ * Check the inode number again in case we're
+ * racing with freeing in xfs_reclaim_inode().
+ * See the comments in that function for more
+ * information as to why the initial check is
+ * not sufficient.
+ */
+ if (ip->i_ino != inum + i) {
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ continue;
+ }
}
rcu_read_unlock();

diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
index 013cc78d7daf..6d0f74ec31e8 100644
--- a/fs/xfs/xfs_inode_item.c
+++ b/fs/xfs/xfs_inode_item.c
@@ -27,6 +27,7 @@
#include "xfs_error.h"
#include "xfs_trace.h"
#include "xfs_trans_priv.h"
+#include "xfs_buf_item.h"
#include "xfs_log.h"


@@ -475,6 +476,23 @@ xfs_inode_item_unpin(
wake_up_bit(&ip->i_flags, __XFS_IPINNED_BIT);
}

+/*
+ * Callback used to mark a buffer with XFS_LI_FAILED when items in the buffer
+ * have been failed during writeback
+ *
+ * This informs the AIL that the inode is already flush locked on the next push,
+ * and acquires a hold on the buffer to ensure that it isn't reclaimed before
+ * dirty data makes it to disk.
+ */
+STATIC void
+xfs_inode_item_error(
+ struct xfs_log_item *lip,
+ struct xfs_buf *bp)
+{
+ ASSERT(xfs_isiflocked(INODE_ITEM(lip)->ili_inode));
+ xfs_set_li_failed(lip, bp);
+}
+
STATIC uint
xfs_inode_item_push(
struct xfs_log_item *lip,
@@ -484,13 +502,28 @@ xfs_inode_item_push(
{
struct xfs_inode_log_item *iip = INODE_ITEM(lip);
struct xfs_inode *ip = iip->ili_inode;
- struct xfs_buf *bp = NULL;
+ struct xfs_buf *bp = lip->li_buf;
uint rval = XFS_ITEM_SUCCESS;
int error;

if (xfs_ipincount(ip) > 0)
return XFS_ITEM_PINNED;

+ /*
+ * The buffer containing this item failed to be written back
+ * previously. Resubmit the buffer for IO.
+ */
+ if (lip->li_flags & XFS_LI_FAILED) {
+ if (!xfs_buf_trylock(bp))
+ return XFS_ITEM_LOCKED;
+
+ if (!xfs_buf_resubmit_failed_buffers(bp, lip, buffer_list))
+ rval = XFS_ITEM_FLUSHING;
+
+ xfs_buf_unlock(bp);
+ return rval;
+ }
+
if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
return XFS_ITEM_LOCKED;

@@ -622,7 +655,8 @@ static const struct xfs_item_ops xfs_inode_item_ops = {
.iop_unlock = xfs_inode_item_unlock,
.iop_committed = xfs_inode_item_committed,
.iop_push = xfs_inode_item_push,
- .iop_committing = xfs_inode_item_committing
+ .iop_committing = xfs_inode_item_committing,
+ .iop_error = xfs_inode_item_error
};


@@ -710,7 +744,8 @@ xfs_iflush_done(
* the AIL lock.
*/
iip = INODE_ITEM(blip);
- if (iip->ili_logged && blip->li_lsn == iip->ili_flush_lsn)
+ if ((iip->ili_logged && blip->li_lsn == iip->ili_flush_lsn) ||
+ lip->li_flags & XFS_LI_FAILED)
need_ail++;

blip = next;
@@ -718,7 +753,8 @@ xfs_iflush_done(

/* make sure we capture the state of the initial inode. */
iip = INODE_ITEM(lip);
- if (iip->ili_logged && lip->li_lsn == iip->ili_flush_lsn)
+ if ((iip->ili_logged && lip->li_lsn == iip->ili_flush_lsn) ||
+ lip->li_flags & XFS_LI_FAILED)
need_ail++;

/*
@@ -739,6 +775,9 @@ xfs_iflush_done(
if (INODE_ITEM(blip)->ili_logged &&
blip->li_lsn == INODE_ITEM(blip)->ili_flush_lsn)
mlip_changed |= xfs_ail_delete_one(ailp, blip);
+ else {
+ xfs_clear_li_failed(blip);
+ }
}

if (mlip_changed) {
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 9c0c7a920304..5049e8ab6e30 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -931,16 +931,15 @@ xfs_ioc_fsgetxattr(
return 0;
}

-STATIC void
-xfs_set_diflags(
+STATIC uint16_t
+xfs_flags2diflags(
struct xfs_inode *ip,
unsigned int xflags)
{
- unsigned int di_flags;
- uint64_t di_flags2;
-
/* can't set PREALLOC this way, just preserve it */
- di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
+ uint16_t di_flags =
+ (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
+
if (xflags & FS_XFLAG_IMMUTABLE)
di_flags |= XFS_DIFLAG_IMMUTABLE;
if (xflags & FS_XFLAG_APPEND)
@@ -970,19 +969,24 @@ xfs_set_diflags(
if (xflags & FS_XFLAG_EXTSIZE)
di_flags |= XFS_DIFLAG_EXTSIZE;
}
- ip->i_d.di_flags = di_flags;

- /* diflags2 only valid for v3 inodes. */
- if (ip->i_d.di_version < 3)
- return;
+ return di_flags;
+}
+
+STATIC uint64_t
+xfs_flags2diflags2(
+ struct xfs_inode *ip,
+ unsigned int xflags)
+{
+ uint64_t di_flags2 =
+ (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);

- di_flags2 = (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
if (xflags & FS_XFLAG_DAX)
di_flags2 |= XFS_DIFLAG2_DAX;
if (xflags & FS_XFLAG_COWEXTSIZE)
di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;

- ip->i_d.di_flags2 = di_flags2;
+ return di_flags2;
}

STATIC void
@@ -1008,11 +1012,12 @@ xfs_diflags_to_linux(
inode->i_flags |= S_NOATIME;
else
inode->i_flags &= ~S_NOATIME;
+#if 0 /* disabled until the flag switching races are sorted out */
if (xflags & FS_XFLAG_DAX)
inode->i_flags |= S_DAX;
else
inode->i_flags &= ~S_DAX;
-
+#endif
}

static int
@@ -1022,6 +1027,7 @@ xfs_ioctl_setattr_xflags(
struct fsxattr *fa)
{
struct xfs_mount *mp = ip->i_mount;
+ uint64_t di_flags2;

/* Can't change realtime flag if any extents are allocated. */
if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
@@ -1052,7 +1058,14 @@ xfs_ioctl_setattr_xflags(
!capable(CAP_LINUX_IMMUTABLE))
return -EPERM;

- xfs_set_diflags(ip, fa->fsx_xflags);
+ /* diflags2 only valid for v3 inodes. */
+ di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
+ if (di_flags2 && ip->i_d.di_version < 3)
+ return -EINVAL;
+
+ ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags);
+ ip->i_d.di_flags2 = di_flags2;
+
xfs_diflags_to_linux(ip);
xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 469c9fa4c178..17081c77ef86 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -817,7 +817,7 @@ xfs_vn_setattr_nonsize(
* Caution: The caller of this function is responsible for calling
* setattr_prepare() or otherwise verifying the change is fine.
*/
-int
+STATIC int
xfs_setattr_size(
struct xfs_inode *ip,
struct iattr *iattr)
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 4ebd0bafc914..c5107c7bc4bf 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -743,10 +743,14 @@ xfs_log_mount_finish(
struct xfs_mount *mp)
{
int error = 0;
+ bool readonly = (mp->m_flags & XFS_MOUNT_RDONLY);

if (mp->m_flags & XFS_MOUNT_NORECOVERY) {
ASSERT(mp->m_flags & XFS_MOUNT_RDONLY);
return 0;
+ } else if (readonly) {
+ /* Allow unlinked processing to proceed */
+ mp->m_flags &= ~XFS_MOUNT_RDONLY;
}

/*
@@ -757,12 +761,27 @@ xfs_log_mount_finish(
* inodes. Turn it off immediately after recovery finishes
* so that we don't leak the quota inodes if subsequent mount
* activities fail.
+ *
+ * We let all inodes involved in redo item processing end up on
+ * the LRU instead of being evicted immediately so that if we do
+ * something to an unlinked inode, the irele won't cause
+ * premature truncation and freeing of the inode, which results
+ * in log recovery failure. We have to evict the unreferenced
+ * lru inodes after clearing MS_ACTIVE because we don't
+ * otherwise clean up the lru if there's a subsequent failure in
+ * xfs_mountfs, which leads to us leaking the inodes if nothing
+ * else (e.g. quotacheck) references the inodes before the
+ * mount failure occurs.
*/
mp->m_super->s_flags |= MS_ACTIVE;
error = xlog_recover_finish(mp->m_log);
if (!error)
xfs_log_work_queue(mp);
mp->m_super->s_flags &= ~MS_ACTIVE;
+ evict_inodes(mp->m_super);
+
+ if (readonly)
+ mp->m_flags |= XFS_MOUNT_RDONLY;

return error;
}
@@ -812,11 +831,14 @@ xfs_log_unmount_write(xfs_mount_t *mp)
int error;

/*
- * Don't write out unmount record on read-only mounts.
+ * Don't write out unmount record on norecovery mounts or ro devices.
* Or, if we are doing a forced umount (typically because of IO errors).
*/
- if (mp->m_flags & XFS_MOUNT_RDONLY)
+ if (mp->m_flags & XFS_MOUNT_NORECOVERY ||
+ xfs_readonly_buftarg(log->l_mp->m_logdev_targp)) {
+ ASSERT(mp->m_flags & XFS_MOUNT_RDONLY);
return 0;
+ }

error = _xfs_log_force(mp, XFS_LOG_SYNC, NULL);
ASSERT(error || !(XLOG_FORCED_SHUTDOWN(log)));
@@ -3353,8 +3375,6 @@ _xfs_log_force(
*/
if (iclog->ic_state & XLOG_STATE_IOERROR)
return -EIO;
- if (log_flushed)
- *log_flushed = 1;
} else {

no_sleep:
@@ -3458,8 +3478,6 @@ _xfs_log_force_lsn(

xlog_wait(&iclog->ic_prev->ic_write_wait,
&log->l_icloglock);
- if (log_flushed)
- *log_flushed = 1;
already_slept = 1;
goto try_again;
}
@@ -3493,9 +3511,6 @@ _xfs_log_force_lsn(
*/
if (iclog->ic_state & XLOG_STATE_IOERROR)
return -EIO;
-
- if (log_flushed)
- *log_flushed = 1;
} else { /* just return */
spin_unlock(&log->l_icloglock);
}
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 9549188f5a36..093ee8289057 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -1029,61 +1029,106 @@ xlog_seek_logrec_hdr(
}

/*
- * Check the log tail for torn writes. This is required when torn writes are
- * detected at the head and the head had to be walked back to a previous record.
- * The tail of the previous record must now be verified to ensure the torn
- * writes didn't corrupt the previous tail.
+ * Calculate distance from head to tail (i.e., unused space in the log).
+ */
+static inline int
+xlog_tail_distance(
+ struct xlog *log,
+ xfs_daddr_t head_blk,
+ xfs_daddr_t tail_blk)
+{
+ if (head_blk < tail_blk)
+ return tail_blk - head_blk;
+
+ return tail_blk + (log->l_logBBsize - head_blk);
+}
+
+/*
+ * Verify the log tail. This is particularly important when torn or incomplete
+ * writes have been detected near the front of the log and the head has been
+ * walked back accordingly.
+ *
+ * We also have to handle the case where the tail was pinned and the head
+ * blocked behind the tail right before a crash. If the tail had been pushed
+ * immediately prior to the crash and the subsequent checkpoint was only
+ * partially written, it's possible it overwrote the last referenced tail in the
+ * log with garbage. This is not a coherency problem because the tail must have
+ * been pushed before it can be overwritten, but appears as log corruption to
+ * recovery because we have no way to know the tail was updated if the
+ * subsequent checkpoint didn't write successfully.
*
- * Return an error if CRC verification fails as recovery cannot proceed.
+ * Therefore, CRC check the log from tail to head. If a failure occurs and the
+ * offending record is within max iclog bufs from the head, walk the tail
+ * forward and retry until a valid tail is found or corruption is detected out
+ * of the range of a possible overwrite.
*/
STATIC int
xlog_verify_tail(
struct xlog *log,
xfs_daddr_t head_blk,
- xfs_daddr_t tail_blk)
+ xfs_daddr_t *tail_blk,
+ int hsize)
{
struct xlog_rec_header *thead;
struct xfs_buf *bp;
xfs_daddr_t first_bad;
- int count;
int error = 0;
bool wrapped;
- xfs_daddr_t tmp_head;
+ xfs_daddr_t tmp_tail;
+ xfs_daddr_t orig_tail = *tail_blk;

bp = xlog_get_bp(log, 1);
if (!bp)
return -ENOMEM;

/*
- * Seek XLOG_MAX_ICLOGS + 1 records past the current tail record to get
- * a temporary head block that points after the last possible
- * concurrently written record of the tail.
+ * Make sure the tail points to a record (returns positive count on
+ * success).
*/
- count = xlog_seek_logrec_hdr(log, head_blk, tail_blk,
- XLOG_MAX_ICLOGS + 1, bp, &tmp_head, &thead,
- &wrapped);
- if (count < 0) {
- error = count;
+ error = xlog_seek_logrec_hdr(log, head_blk, *tail_blk, 1, bp,
+ &tmp_tail, &thead, &wrapped);
+ if (error < 0)
goto out;
- }
-
- /*
- * If the call above didn't find XLOG_MAX_ICLOGS + 1 records, we ran
- * into the actual log head. tmp_head points to the start of the record
- * so update it to the actual head block.
- */
- if (count < XLOG_MAX_ICLOGS + 1)
- tmp_head = head_blk;
+ if (*tail_blk != tmp_tail)
+ *tail_blk = tmp_tail;

/*
- * We now have a tail and temporary head block that covers at least
- * XLOG_MAX_ICLOGS records from the tail. We need to verify that these
- * records were completely written. Run a CRC verification pass from
- * tail to head and return the result.
+ * Run a CRC check from the tail to the head. We can't just check
+ * MAX_ICLOGS records past the tail because the tail may point to stale
+ * blocks cleared during the search for the head/tail. These blocks are
+ * overwritten with zero-length records and thus record count is not a
+ * reliable indicator of the iclog state before a crash.
*/
- error = xlog_do_recovery_pass(log, tmp_head, tail_blk,
+ first_bad = 0;
+ error = xlog_do_recovery_pass(log, head_blk, *tail_blk,
XLOG_RECOVER_CRCPASS, &first_bad);
+ while ((error == -EFSBADCRC || error == -EFSCORRUPTED) && first_bad) {
+ int tail_distance;
+
+ /*
+ * Is corruption within range of the head? If so, retry from
+ * the next record. Otherwise return an error.
+ */
+ tail_distance = xlog_tail_distance(log, head_blk, first_bad);
+ if (tail_distance > BTOBB(XLOG_MAX_ICLOGS * hsize))
+ break;

+ /* skip to the next record; returns positive count on success */
+ error = xlog_seek_logrec_hdr(log, head_blk, first_bad, 2, bp,
+ &tmp_tail, &thead, &wrapped);
+ if (error < 0)
+ goto out;
+
+ *tail_blk = tmp_tail;
+ first_bad = 0;
+ error = xlog_do_recovery_pass(log, head_blk, *tail_blk,
+ XLOG_RECOVER_CRCPASS, &first_bad);
+ }
+
+ if (!error && *tail_blk != orig_tail)
+ xfs_warn(log->l_mp,
+ "Tail block (0x%llx) overwrite detected. Updated to 0x%llx",
+ orig_tail, *tail_blk);
out:
xlog_put_bp(bp);
return error;
@@ -1143,7 +1188,7 @@ xlog_verify_head(
*/
error = xlog_do_recovery_pass(log, *head_blk, tmp_rhead_blk,
XLOG_RECOVER_CRCPASS, &first_bad);
- if (error == -EFSBADCRC) {
+ if ((error == -EFSBADCRC || error == -EFSCORRUPTED) && first_bad) {
/*
* We've hit a potential torn write. Reset the error and warn
* about it.
@@ -1183,31 +1228,12 @@ xlog_verify_head(
ASSERT(0);
return 0;
}
-
- /*
- * Now verify the tail based on the updated head. This is
- * required because the torn writes trimmed from the head could
- * have been written over the tail of a previous record. Return
- * any errors since recovery cannot proceed if the tail is
- * corrupt.
- *
- * XXX: This leaves a gap in truly robust protection from torn
- * writes in the log. If the head is behind the tail, the tail
- * pushes forward to create some space and then a crash occurs
- * causing the writes into the previous record's tail region to
- * tear, log recovery isn't able to recover.
- *
- * How likely is this to occur? If possible, can we do something
- * more intelligent here? Is it safe to push the tail forward if
- * we can determine that the tail is within the range of the
- * torn write (e.g., the kernel can only overwrite the tail if
- * it has actually been pushed forward)? Alternatively, could we
- * somehow prevent this condition at runtime?
- */
- error = xlog_verify_tail(log, *head_blk, *tail_blk);
}
+ if (error)
+ return error;

- return error;
+ return xlog_verify_tail(log, *head_blk, tail_blk,
+ be32_to_cpu((*rhead)->h_size));
}

/*
@@ -4801,12 +4827,16 @@ xlog_recover_process_intents(
int error = 0;
struct xfs_ail_cursor cur;
struct xfs_ail *ailp;
+#if defined(DEBUG) || defined(XFS_WARN)
xfs_lsn_t last_lsn;
+#endif

ailp = log->l_ailp;
spin_lock(&ailp->xa_lock);
lip = xfs_trans_ail_cursor_first(ailp, &cur, 0);
+#if defined(DEBUG) || defined(XFS_WARN)
last_lsn = xlog_assign_lsn(log->l_curr_cycle, log->l_curr_block);
+#endif
while (lip != NULL) {
/*
* We're done when we see something other than an intent.
@@ -5218,7 +5248,7 @@ xlog_do_recovery_pass(
xfs_daddr_t *first_bad) /* out: first bad log rec */
{
xlog_rec_header_t *rhead;
- xfs_daddr_t blk_no;
+ xfs_daddr_t blk_no, rblk_no;
xfs_daddr_t rhead_blk;
char *offset;
xfs_buf_t *hbp, *dbp;
@@ -5231,7 +5261,7 @@ xlog_do_recovery_pass(
LIST_HEAD (buffer_list);

ASSERT(head_blk != tail_blk);
- rhead_blk = 0;
+ blk_no = rhead_blk = tail_blk;

for (i = 0; i < XLOG_RHASH_SIZE; i++)
INIT_HLIST_HEAD(&rhash[i]);
@@ -5309,7 +5339,6 @@ xlog_do_recovery_pass(
}

memset(rhash, 0, sizeof(rhash));
- blk_no = rhead_blk = tail_blk;
if (tail_blk > head_blk) {
/*
* Perform recovery around the end of the physical log.
@@ -5371,9 +5400,19 @@ xlog_do_recovery_pass(
bblks = (int)BTOBB(be32_to_cpu(rhead->h_len));
blk_no += hblks;

- /* Read in data for log record */
- if (blk_no + bblks <= log->l_logBBsize) {
- error = xlog_bread(log, blk_no, bblks, dbp,
+ /*
+ * Read the log record data in multiple reads if it
+ * wraps around the end of the log. Note that if the
+ * header already wrapped, blk_no could point past the
+ * end of the log. The record data is contiguous in
+ * that case.
+ */
+ if (blk_no + bblks <= log->l_logBBsize ||
+ blk_no >= log->l_logBBsize) {
+ /* mod blk_no in case the header wrapped and
+ * pushed it beyond the end of the log */
+ rblk_no = do_mod(blk_no, log->l_logBBsize);
+ error = xlog_bread(log, rblk_no, bblks, dbp,
&offset);
if (error)
goto bread_err2;
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 38aaacdbb8b3..c1c4c2ea1014 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1220,7 +1220,7 @@ xfs_test_remount_options(
tmp_mp->m_super = sb;
error = xfs_parseargs(tmp_mp, options);
xfs_free_fsname(tmp_mp);
- kfree(tmp_mp);
+ kmem_free(tmp_mp);

return error;
}
diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index bcc3cdf8e1c5..bb0099708827 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -517,7 +517,6 @@ DEFINE_BUF_ITEM_EVENT(xfs_buf_item_size);
DEFINE_BUF_ITEM_EVENT(xfs_buf_item_size_ordered);
DEFINE_BUF_ITEM_EVENT(xfs_buf_item_size_stale);
DEFINE_BUF_ITEM_EVENT(xfs_buf_item_format);
-DEFINE_BUF_ITEM_EVENT(xfs_buf_item_format_ordered);
DEFINE_BUF_ITEM_EVENT(xfs_buf_item_format_stale);
DEFINE_BUF_ITEM_EVENT(xfs_buf_item_ordered);
DEFINE_BUF_ITEM_EVENT(xfs_buf_item_pin);
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index 6bdad6f58934..4709823e04b9 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -49,6 +49,7 @@ typedef struct xfs_log_item {
struct xfs_ail *li_ailp; /* ptr to AIL */
uint li_type; /* item type */
uint li_flags; /* misc flags */
+ struct xfs_buf *li_buf; /* real buffer pointer */
struct xfs_log_item *li_bio_list; /* buffer item list */
void (*li_cb)(struct xfs_buf *,
struct xfs_log_item *);
@@ -64,11 +65,13 @@ typedef struct xfs_log_item {
} xfs_log_item_t;

#define XFS_LI_IN_AIL 0x1
-#define XFS_LI_ABORTED 0x2
+#define XFS_LI_ABORTED 0x2
+#define XFS_LI_FAILED 0x4

#define XFS_LI_FLAGS \
{ XFS_LI_IN_AIL, "IN_AIL" }, \
- { XFS_LI_ABORTED, "ABORTED" }
+ { XFS_LI_ABORTED, "ABORTED" }, \
+ { XFS_LI_FAILED, "FAILED" }

struct xfs_item_ops {
void (*iop_size)(xfs_log_item_t *, int *, int *);
@@ -79,6 +82,7 @@ struct xfs_item_ops {
void (*iop_unlock)(xfs_log_item_t *);
xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
+ void (*iop_error)(xfs_log_item_t *, xfs_buf_t *);
};

void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,
@@ -208,12 +212,14 @@ void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
-void xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);
+bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);
void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
-void xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint);
+void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint,
+ uint);
+void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *);
void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);

void xfs_extent_free_init_defer_op(void);
diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c
index 9056c0f34a3c..70f5ab017323 100644
--- a/fs/xfs/xfs_trans_ail.c
+++ b/fs/xfs/xfs_trans_ail.c
@@ -687,12 +687,13 @@ xfs_trans_ail_update_bulk(
bool
xfs_ail_delete_one(
struct xfs_ail *ailp,
- struct xfs_log_item *lip)
+ struct xfs_log_item *lip)
{
struct xfs_log_item *mlip = xfs_ail_min(ailp);

trace_xfs_ail_delete(lip, mlip->li_lsn, lip->li_lsn);
xfs_ail_delete(ailp, lip);
+ xfs_clear_li_failed(lip);
lip->li_flags &= ~XFS_LI_IN_AIL;
lip->li_lsn = 0;

diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c
index 86987d823d76..3ba7a96a8abd 100644
--- a/fs/xfs/xfs_trans_buf.c
+++ b/fs/xfs/xfs_trans_buf.c
@@ -435,7 +435,7 @@ xfs_trans_brelse(xfs_trans_t *tp,
if (XFS_FORCED_SHUTDOWN(tp->t_mountp) && freed) {
xfs_trans_ail_remove(&bip->bli_item, SHUTDOWN_LOG_IO_ERROR);
xfs_buf_item_relse(bp);
- } else if (!xfs_buf_item_dirty(bip)) {
+ } else if (!(bip->bli_flags & XFS_BLI_DIRTY)) {
/***
ASSERT(bp->b_pincount == 0);
***/
@@ -493,25 +493,17 @@ xfs_trans_bhold_release(xfs_trans_t *tp,
}

/*
- * This is called to mark bytes first through last inclusive of the given
- * buffer as needing to be logged when the transaction is committed.
- * The buffer must already be associated with the given transaction.
- *
- * First and last are numbers relative to the beginning of this buffer,
- * so the first byte in the buffer is numbered 0 regardless of the
- * value of b_blkno.
+ * Mark a buffer dirty in the transaction.
*/
void
-xfs_trans_log_buf(xfs_trans_t *tp,
- xfs_buf_t *bp,
- uint first,
- uint last)
+xfs_trans_dirty_buf(
+ struct xfs_trans *tp,
+ struct xfs_buf *bp)
{
- xfs_buf_log_item_t *bip = bp->b_fspriv;
+ struct xfs_buf_log_item *bip = bp->b_fspriv;

ASSERT(bp->b_transp == tp);
ASSERT(bip != NULL);
- ASSERT(first <= last && last < BBTOB(bp->b_length));
ASSERT(bp->b_iodone == NULL ||
bp->b_iodone == xfs_buf_iodone_callbacks);

@@ -531,8 +523,6 @@ xfs_trans_log_buf(xfs_trans_t *tp,
bp->b_iodone = xfs_buf_iodone_callbacks;
bip->bli_item.li_cb = xfs_buf_iodone;

- trace_xfs_trans_log_buf(bip);
-
/*
* If we invalidated the buffer within this transaction, then
* cancel the invalidation now that we're dirtying the buffer
@@ -545,17 +535,37 @@ xfs_trans_log_buf(xfs_trans_t *tp,
bp->b_flags &= ~XBF_STALE;
bip->__bli_format.blf_flags &= ~XFS_BLF_CANCEL;
}
+ bip->bli_flags |= XFS_BLI_DIRTY | XFS_BLI_LOGGED;

tp->t_flags |= XFS_TRANS_DIRTY;
bip->bli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
+}

- /*
- * If we have an ordered buffer we are not logging any dirty range but
- * it still needs to be marked dirty and that it has been logged.
- */
- bip->bli_flags |= XFS_BLI_DIRTY | XFS_BLI_LOGGED;
- if (!(bip->bli_flags & XFS_BLI_ORDERED))
- xfs_buf_item_log(bip, first, last);
+/*
+ * This is called to mark bytes first through last inclusive of the given
+ * buffer as needing to be logged when the transaction is committed.
+ * The buffer must already be associated with the given transaction.
+ *
+ * First and last are numbers relative to the beginning of this buffer,
+ * so the first byte in the buffer is numbered 0 regardless of the
+ * value of b_blkno.
+ */
+void
+xfs_trans_log_buf(
+ struct xfs_trans *tp,
+ struct xfs_buf *bp,
+ uint first,
+ uint last)
+{
+ struct xfs_buf_log_item *bip = bp->b_fspriv;
+
+ ASSERT(first <= last && last < BBTOB(bp->b_length));
+ ASSERT(!(bip->bli_flags & XFS_BLI_ORDERED));
+
+ xfs_trans_dirty_buf(tp, bp);
+
+ trace_xfs_trans_log_buf(bip);
+ xfs_buf_item_log(bip, first, last);
}


@@ -708,14 +718,13 @@ xfs_trans_inode_alloc_buf(
}

/*
- * Mark the buffer as ordered for this transaction. This means
- * that the contents of the buffer are not recorded in the transaction
- * but it is tracked in the AIL as though it was. This allows us
- * to record logical changes in transactions rather than the physical
- * changes we make to the buffer without changing writeback ordering
- * constraints of metadata buffers.
+ * Mark the buffer as ordered for this transaction. This means that the contents
+ * of the buffer are not recorded in the transaction but it is tracked in the
+ * AIL as though it was. This allows us to record logical changes in
+ * transactions rather than the physical changes we make to the buffer without
+ * changing writeback ordering constraints of metadata buffers.
*/
-void
+bool
xfs_trans_ordered_buf(
struct xfs_trans *tp,
struct xfs_buf *bp)
@@ -726,8 +735,18 @@ xfs_trans_ordered_buf(
ASSERT(bip != NULL);
ASSERT(atomic_read(&bip->bli_refcount) > 0);

+ if (xfs_buf_item_dirty_format(bip))
+ return false;
+
bip->bli_flags |= XFS_BLI_ORDERED;
trace_xfs_buf_item_ordered(bip);
+
+ /*
+ * We don't log a dirty range of an ordered buffer but it still needs
+ * to be marked dirty and that it has been logged.
+ */
+ xfs_trans_dirty_buf(tp, bp);
+ return true;
}

/*
diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h
index d91706c56c63..b317a3644c00 100644
--- a/fs/xfs/xfs_trans_priv.h
+++ b/fs/xfs/xfs_trans_priv.h
@@ -164,4 +164,35 @@ xfs_trans_ail_copy_lsn(
*dst = *src;
}
#endif
+
+static inline void
+xfs_clear_li_failed(
+ struct xfs_log_item *lip)
+{
+ struct xfs_buf *bp = lip->li_buf;
+
+ ASSERT(lip->li_flags & XFS_LI_IN_AIL);
+ lockdep_assert_held(&lip->li_ailp->xa_lock);
+
+ if (lip->li_flags & XFS_LI_FAILED) {
+ lip->li_flags &= ~XFS_LI_FAILED;
+ lip->li_buf = NULL;
+ xfs_buf_rele(bp);
+ }
+}
+
+static inline void
+xfs_set_li_failed(
+ struct xfs_log_item *lip,
+ struct xfs_buf *bp)
+{
+ lockdep_assert_held(&lip->li_ailp->xa_lock);
+
+ if (!(lip->li_flags & XFS_LI_FAILED)) {
+ xfs_buf_hold(bp);
+ lip->li_flags |= XFS_LI_FAILED;
+ lip->li_buf = bp;
+ }
+}
+
#endif /* __XFS_TRANS_PRIV_H__ */
diff --git a/include/linux/fs.h b/include/linux/fs.h
index cbfe127bccf8..d0c0ca8ea8c1 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2831,6 +2831,7 @@ static inline void lockdep_annotate_inode_mutex_key(struct inode *inode) { };
#endif
extern void unlock_new_inode(struct inode *);
extern unsigned int get_next_ino(void);
+extern void evict_inodes(struct super_block *sb);

extern void __iget(struct inode * inode);
extern void iget_failed(struct inode *);
diff --git a/include/linux/mm_inline.h b/include/linux/mm_inline.h
index e030a68ead7e..25438b2b6f22 100644
--- a/include/linux/mm_inline.h
+++ b/include/linux/mm_inline.h
@@ -126,4 +126,10 @@ static __always_inline enum lru_list page_lru(struct page *page)

#define lru_to_page(head) (list_entry((head)->prev, struct page, lru))

+#ifdef arch_unmap_kpfn
+extern void arch_unmap_kpfn(unsigned long pfn);
+#else
+static __always_inline void arch_unmap_kpfn(unsigned long pfn) { }
+#endif
+
#endif
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index d67a8182e5eb..63df75ae70ee 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -885,7 +885,7 @@ void kfree_skb(struct sk_buff *skb);
void kfree_skb_list(struct sk_buff *segs);
void skb_tx_error(struct sk_buff *skb);
void consume_skb(struct sk_buff *skb);
-void consume_stateless_skb(struct sk_buff *skb);
+void __consume_stateless_skb(struct sk_buff *skb);
void __kfree_skb(struct sk_buff *skb);
extern struct kmem_cache *skbuff_head_cache;

diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h
index 6fdcd2427776..fc59e0775e00 100644
--- a/include/net/inet_frag.h
+++ b/include/net/inet_frag.h
@@ -1,14 +1,9 @@
#ifndef __NET_FRAG_H__
#define __NET_FRAG_H__

-#include <linux/percpu_counter.h>
-
struct netns_frags {
- /* The percpu_counter "mem" need to be cacheline aligned.
- * mem.count must not share cacheline with other writers
- */
- struct percpu_counter mem ____cacheline_aligned_in_smp;
-
+ /* Keep atomic mem on separate cachelines in structs that include it */
+ atomic_t mem ____cacheline_aligned_in_smp;
/* sysctls */
int timeout;
int high_thresh;
@@ -108,15 +103,10 @@ struct inet_frags {
int inet_frags_init(struct inet_frags *);
void inet_frags_fini(struct inet_frags *);

-static inline int inet_frags_init_net(struct netns_frags *nf)
-{
- return percpu_counter_init(&nf->mem, 0, GFP_KERNEL);
-}
-static inline void inet_frags_uninit_net(struct netns_frags *nf)
+static inline void inet_frags_init_net(struct netns_frags *nf)
{
- percpu_counter_destroy(&nf->mem);
+ atomic_set(&nf->mem, 0);
}
-
void inet_frags_exit_net(struct netns_frags *nf, struct inet_frags *f);

void inet_frag_kill(struct inet_frag_queue *q, struct inet_frags *f);
@@ -140,31 +130,24 @@ static inline bool inet_frag_evicting(struct inet_frag_queue *q)

/* Memory Tracking Functions. */

-/* The default percpu_counter batch size is not big enough to scale to
- * fragmentation mem acct sizes.
- * The mem size of a 64K fragment is approx:
- * (44 fragments * 2944 truesize) + frag_queue struct(200) = 129736 bytes
- */
-static unsigned int frag_percpu_counter_batch = 130000;
-
static inline int frag_mem_limit(struct netns_frags *nf)
{
- return percpu_counter_read(&nf->mem);
+ return atomic_read(&nf->mem);
}

static inline void sub_frag_mem_limit(struct netns_frags *nf, int i)
{
- percpu_counter_add_batch(&nf->mem, -i, frag_percpu_counter_batch);
+ atomic_sub(i, &nf->mem);
}

static inline void add_frag_mem_limit(struct netns_frags *nf, int i)
{
- percpu_counter_add_batch(&nf->mem, i, frag_percpu_counter_batch);
+ atomic_add(i, &nf->mem);
}

-static inline unsigned int sum_frag_mem_limit(struct netns_frags *nf)
+static inline int sum_frag_mem_limit(struct netns_frags *nf)
{
- return percpu_counter_sum_positive(&nf->mem);
+ return atomic_read(&nf->mem);
}

/* RFC 3168 support :
diff --git a/lib/idr.c b/lib/idr.c
index b13682bb0a1c..20c2779e8d12 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -154,7 +154,7 @@ void *idr_replace(struct idr *idr, void *ptr, int id)
void __rcu **slot = NULL;
void *entry;

- if (WARN_ON_ONCE(id < 0))
+ if (id < 0)
return ERR_PTR(-EINVAL);
if (WARN_ON_ONCE(radix_tree_is_internal_node(ptr)))
return ERR_PTR(-EINVAL);
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 1cd3b3569af8..88366626c0b7 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1146,6 +1146,8 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
return 0;
}

+ arch_unmap_kpfn(pfn);
+
orig_head = hpage = compound_head(p);
num_poisoned_pages_inc();

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index e07556606284..72eb23d2426f 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -753,14 +753,11 @@ EXPORT_SYMBOL(consume_skb);
* consume_stateless_skb - free an skbuff, assuming it is stateless
* @skb: buffer to free
*
- * Works like consume_skb(), but this variant assumes that all the head
- * states have been already dropped.
+ * Alike consume_skb(), but this variant assumes that this is the last
+ * skb reference and all the head states have been already dropped
*/
-void consume_stateless_skb(struct sk_buff *skb)
+void __consume_stateless_skb(struct sk_buff *skb)
{
- if (!skb_unref(skb))
- return;
-
trace_consume_skb(skb);
if (likely(skb->head))
skb_release_data(skb);
diff --git a/net/ieee802154/6lowpan/reassembly.c b/net/ieee802154/6lowpan/reassembly.c
index 30d875dff6b5..f85b08baff16 100644
--- a/net/ieee802154/6lowpan/reassembly.c
+++ b/net/ieee802154/6lowpan/reassembly.c
@@ -580,19 +580,14 @@ static int __net_init lowpan_frags_init_net(struct net *net)
{
struct netns_ieee802154_lowpan *ieee802154_lowpan =
net_ieee802154_lowpan(net);
- int res;

ieee802154_lowpan->frags.high_thresh = IPV6_FRAG_HIGH_THRESH;
ieee802154_lowpan->frags.low_thresh = IPV6_FRAG_LOW_THRESH;
ieee802154_lowpan->frags.timeout = IPV6_FRAG_TIMEOUT;

- res = inet_frags_init_net(&ieee802154_lowpan->frags);
- if (res)
- return res;
- res = lowpan_frags_ns_sysctl_register(net);
- if (res)
- inet_frags_uninit_net(&ieee802154_lowpan->frags);
- return res;
+ inet_frags_init_net(&ieee802154_lowpan->frags);
+
+ return lowpan_frags_ns_sysctl_register(net);
}

static void __net_exit lowpan_frags_exit_net(struct net *net)
diff --git a/net/ipv4/inet_fragment.c b/net/ipv4/inet_fragment.c
index 96e95e83cc61..af74d0433453 100644
--- a/net/ipv4/inet_fragment.c
+++ b/net/ipv4/inet_fragment.c
@@ -234,10 +234,8 @@ void inet_frags_exit_net(struct netns_frags *nf, struct inet_frags *f)
cond_resched();

if (read_seqretry(&f->rnd_seqlock, seq) ||
- percpu_counter_sum(&nf->mem))
+ sum_frag_mem_limit(nf))
goto evict_again;
-
- percpu_counter_destroy(&nf->mem);
}
EXPORT_SYMBOL(inet_frags_exit_net);

diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index 9a8cfac503dc..46408c220d9d 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -844,8 +844,6 @@ static void __init ip4_frags_ctl_register(void)

static int __net_init ipv4_frags_init_net(struct net *net)
{
- int res;
-
/* Fragment cache limits.
*
* The fragment memory accounting code, (tries to) account for
@@ -871,13 +869,9 @@ static int __net_init ipv4_frags_init_net(struct net *net)

net->ipv4.frags.max_dist = 64;

- res = inet_frags_init_net(&net->ipv4.frags);
- if (res)
- return res;
- res = ip4_frags_ns_ctl_register(net);
- if (res)
- inet_frags_uninit_net(&net->ipv4.frags);
- return res;
+ inet_frags_init_net(&net->ipv4.frags);
+
+ return ip4_frags_ns_ctl_register(net);
}

static void __net_exit ipv4_frags_exit_net(struct net *net)
diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c
index 129d1a3616f8..e1856bfa753d 100644
--- a/net/ipv4/ip_tunnel.c
+++ b/net/ipv4/ip_tunnel.c
@@ -618,8 +618,8 @@ void ip_md_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, u8 proto)
ip_rt_put(rt);
goto tx_dropped;
}
- iptunnel_xmit(NULL, rt, skb, fl4.saddr, fl4.daddr, proto, key->tos,
- key->ttl, df, !net_eq(tunnel->net, dev_net(dev)));
+ iptunnel_xmit(NULL, rt, skb, fl4.saddr, fl4.daddr, proto, tos, ttl,
+ df, !net_eq(tunnel->net, dev_net(dev)));
return;
tx_error:
dev->stats.tx_errors++;
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index e9252c7df809..21022db7a2a6 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1722,9 +1722,9 @@ int tcp_v4_rcv(struct sk_buff *skb)
*/
sock_hold(sk);
refcounted = true;
- if (tcp_filter(sk, skb))
- goto discard_and_relse;
- nsk = tcp_check_req(sk, skb, req, false);
+ nsk = NULL;
+ if (!tcp_filter(sk, skb))
+ nsk = tcp_check_req(sk, skb, req, false);
if (!nsk) {
reqsk_put(req);
goto discard_and_relse;
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 62344804baae..979e4d8526ba 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1386,12 +1386,15 @@ void skb_consume_udp(struct sock *sk, struct sk_buff *skb, int len)
unlock_sock_fast(sk, slow);
}

+ if (!skb_unref(skb))
+ return;
+
/* In the more common cases we cleared the head states previously,
* see __udp_queue_rcv_skb().
*/
if (unlikely(udp_skb_has_head_state(skb)))
skb_release_head_state(skb);
- consume_stateless_skb(skb);
+ __consume_stateless_skb(skb);
}
EXPORT_SYMBOL_GPL(skb_consume_udp);

diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index e1c85bb4eac0..1792bbfd80e1 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -198,6 +198,12 @@ static void rt6_release(struct rt6_info *rt)
}
}

+static void fib6_free_table(struct fib6_table *table)
+{
+ inetpeer_invalidate_tree(&table->tb6_peers);
+ kfree(table);
+}
+
static void fib6_link_table(struct net *net, struct fib6_table *tb)
{
unsigned int h;
@@ -1915,15 +1921,22 @@ static int __net_init fib6_net_init(struct net *net)

static void fib6_net_exit(struct net *net)
{
+ unsigned int i;
+
rt6_ifdown(net, NULL);
del_timer_sync(&net->ipv6.ip6_fib_timer);

-#ifdef CONFIG_IPV6_MULTIPLE_TABLES
- inetpeer_invalidate_tree(&net->ipv6.fib6_local_tbl->tb6_peers);
- kfree(net->ipv6.fib6_local_tbl);
-#endif
- inetpeer_invalidate_tree(&net->ipv6.fib6_main_tbl->tb6_peers);
- kfree(net->ipv6.fib6_main_tbl);
+ for (i = 0; i < FIB6_TABLE_HASHSZ; i++) {
+ struct hlist_head *head = &net->ipv6.fib_table_hash[i];
+ struct hlist_node *tmp;
+ struct fib6_table *tb;
+
+ hlist_for_each_entry_safe(tb, tmp, head, tb6_hlist) {
+ hlist_del(&tb->tb6_hlist);
+ fib6_free_table(tb);
+ }
+ }
+
kfree(net->ipv6.fib_table_hash);
kfree(net->ipv6.rt6_stats);
}
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index 67ff2aaf5dcb..b7a72d409334 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -432,7 +432,9 @@ static void ip6gre_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
}
break;
case ICMPV6_PKT_TOOBIG:
- mtu = be32_to_cpu(info) - offset;
+ mtu = be32_to_cpu(info) - offset - t->tun_hlen;
+ if (t->dev->type == ARPHRD_ETHER)
+ mtu -= ETH_HLEN;
if (mtu < IPV6_MIN_MTU)
mtu = IPV6_MIN_MTU;
t->dev->mtu = mtu;
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index 986d4ca38832..b263bf3a19f7 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -622,18 +622,12 @@ EXPORT_SYMBOL_GPL(nf_ct_frag6_gather);

static int nf_ct_net_init(struct net *net)
{
- int res;
-
net->nf_frag.frags.high_thresh = IPV6_FRAG_HIGH_THRESH;
net->nf_frag.frags.low_thresh = IPV6_FRAG_LOW_THRESH;
net->nf_frag.frags.timeout = IPV6_FRAG_TIMEOUT;
- res = inet_frags_init_net(&net->nf_frag.frags);
- if (res)
- return res;
- res = nf_ct_frag6_sysctl_register(net);
- if (res)
- inet_frags_uninit_net(&net->nf_frag.frags);
- return res;
+ inet_frags_init_net(&net->nf_frag.frags);
+
+ return nf_ct_frag6_sysctl_register(net);
}

static void nf_ct_net_exit(struct net *net)
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index e1da5b888cc4..846012eae526 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -714,19 +714,13 @@ static void ip6_frags_sysctl_unregister(void)

static int __net_init ipv6_frags_init_net(struct net *net)
{
- int res;
-
net->ipv6.frags.high_thresh = IPV6_FRAG_HIGH_THRESH;
net->ipv6.frags.low_thresh = IPV6_FRAG_LOW_THRESH;
net->ipv6.frags.timeout = IPV6_FRAG_TIMEOUT;

- res = inet_frags_init_net(&net->ipv6.frags);
- if (res)
- return res;
- res = ip6_frags_ns_sysctl_register(net);
- if (res)
- inet_frags_uninit_net(&net->ipv6.frags);
- return res;
+ inet_frags_init_net(&net->ipv6.frags);
+
+ return ip6_frags_ns_sysctl_register(net);
}

static void __net_exit ipv6_frags_exit_net(struct net *net)
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 206210125fd7..660b9b2a8a25 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1456,9 +1456,9 @@ static int tcp_v6_rcv(struct sk_buff *skb)
}
sock_hold(sk);
refcounted = true;
- if (tcp_filter(sk, skb))
- goto discard_and_relse;
- nsk = tcp_check_req(sk, skb, req, false);
+ nsk = NULL;
+ if (!tcp_filter(sk, skb))
+ nsk = tcp_check_req(sk, skb, req, false);
if (!nsk) {
reqsk_put(req);
goto discard_and_relse;
diff --git a/net/sctp/ulpqueue.c b/net/sctp/ulpqueue.c
index 0225d62a869f..a71be33f3afe 100644
--- a/net/sctp/ulpqueue.c
+++ b/net/sctp/ulpqueue.c
@@ -265,7 +265,8 @@ int sctp_ulpq_tail_event(struct sctp_ulpq *ulpq, struct sctp_ulpevent *event)
sctp_ulpq_clear_pd(ulpq);

if (queue == &sk->sk_receive_queue && !sp->data_ready_signalled) {
- sp->data_ready_signalled = 1;
+ if (!sock_owned_by_user(sk))
+ sp->data_ready_signalled = 1;
sk->sk_data_ready(sk);
}
return 1;
\
 
 \ /
  Last update: 2017-09-20 09:47    [W:0.190 / U:10.484 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site