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-rw-r--r--fs/binfmt_elf.c6
-rw-r--r--fs/btrfs/super.c26
-rw-r--r--fs/dax.c10
-rw-r--r--fs/fs-writeback.c16
-rw-r--r--fs/ocfs2/aops.c7
-rw-r--r--fs/ocfs2/aops.h3
-rw-r--r--fs/ocfs2/cluster/heartbeat.c2
-rw-r--r--fs/ocfs2/dlm/dlmmaster.c11
-rw-r--r--fs/ocfs2/dlm/dlmrecovery.c2
-rw-r--r--fs/ocfs2/inode.c2
-rw-r--r--fs/ocfs2/journal.c4
-rw-r--r--fs/ocfs2/mmap.c3
-rw-r--r--fs/ocfs2/namei.c6
-rw-r--r--fs/ocfs2/ocfs2.h2
-rw-r--r--fs/ocfs2/refcounttree.c1
-rw-r--r--fs/ocfs2/super.c2
-rw-r--r--fs/proc/array.c7
-rw-r--r--fs/proc/base.c31
-rw-r--r--fs/proc/inode.c37
-rw-r--r--fs/proc/internal.h3
-rw-r--r--fs/proc/root.c1
-rw-r--r--fs/proc/task_mmu.c1
22 files changed, 101 insertions, 82 deletions
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 2472af2798c7..e6c1bd443806 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -2204,7 +2204,9 @@ static int elf_core_dump(struct coredump_params *cprm)
dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE);
- vma_filesz = kmalloc_array(segs - 1, sizeof(*vma_filesz), GFP_KERNEL);
+ if (segs - 1 > ULONG_MAX / sizeof(*vma_filesz))
+ goto end_coredump;
+ vma_filesz = vmalloc((segs - 1) * sizeof(*vma_filesz));
if (!vma_filesz)
goto end_coredump;
@@ -2311,7 +2313,7 @@ end_coredump:
cleanup:
free_note_info(&info);
kfree(shdr4extnum);
- kfree(vma_filesz);
+ vfree(vma_filesz);
kfree(phdr4note);
kfree(elf);
out:
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 74ed5aae6cea..180f910339f4 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -202,27 +202,31 @@ static struct ratelimit_state printk_limits[] = {
void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
{
struct super_block *sb = fs_info->sb;
- char lvl[4];
+ char lvl[PRINTK_MAX_SINGLE_HEADER_LEN + 1];
struct va_format vaf;
va_list args;
- const char *type = logtypes[4];
+ const char *type = NULL;
int kern_level;
struct ratelimit_state *ratelimit;
va_start(args, fmt);
- kern_level = printk_get_level(fmt);
- if (kern_level) {
+ while ((kern_level = printk_get_level(fmt)) != 0) {
size_t size = printk_skip_level(fmt) - fmt;
- memcpy(lvl, fmt, size);
- lvl[size] = '\0';
+
+ if (kern_level >= '0' && kern_level <= '7') {
+ memcpy(lvl, fmt, size);
+ lvl[size] = '\0';
+ type = logtypes[kern_level - '0'];
+ ratelimit = &printk_limits[kern_level - '0'];
+ }
fmt += size;
- type = logtypes[kern_level - '0'];
- ratelimit = &printk_limits[kern_level - '0'];
- } else {
+ }
+
+ if (!type) {
*lvl = '\0';
- /* Default to debug output */
- ratelimit = &printk_limits[7];
+ type = logtypes[4];
+ ratelimit = &printk_limits[4];
}
vaf.fmt = fmt;
diff --git a/fs/dax.c b/fs/dax.c
index 014defd2e744..6916ed37d463 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -342,7 +342,7 @@ static inline void *lock_slot(struct address_space *mapping, void **slot)
radix_tree_deref_slot_protected(slot, &mapping->tree_lock);
entry |= RADIX_DAX_ENTRY_LOCK;
- radix_tree_replace_slot(slot, (void *)entry);
+ radix_tree_replace_slot(&mapping->page_tree, slot, (void *)entry);
return (void *)entry;
}
@@ -356,7 +356,7 @@ static inline void *unlock_slot(struct address_space *mapping, void **slot)
radix_tree_deref_slot_protected(slot, &mapping->tree_lock);
entry &= ~(unsigned long)RADIX_DAX_ENTRY_LOCK;
- radix_tree_replace_slot(slot, (void *)entry);
+ radix_tree_replace_slot(&mapping->page_tree, slot, (void *)entry);
return (void *)entry;
}
@@ -643,12 +643,14 @@ static void *dax_insert_mapping_entry(struct address_space *mapping,
}
mapping->nrexceptional++;
} else {
+ struct radix_tree_node *node;
void **slot;
void *ret;
- ret = __radix_tree_lookup(page_tree, index, NULL, &slot);
+ ret = __radix_tree_lookup(page_tree, index, &node, &slot);
WARN_ON_ONCE(ret != entry);
- radix_tree_replace_slot(slot, new_entry);
+ __radix_tree_replace(page_tree, node, slot,
+ new_entry, NULL, NULL);
}
if (vmf->flags & FAULT_FLAG_WRITE)
radix_tree_tag_set(page_tree, index, PAGECACHE_TAG_DIRTY);
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 05713a5da083..ef600591d96f 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -1769,15 +1769,13 @@ static long wb_writeback(struct bdi_writeback *wb,
* become available for writeback. Otherwise
* we'll just busyloop.
*/
- if (!list_empty(&wb->b_more_io)) {
- trace_writeback_wait(wb, work);
- inode = wb_inode(wb->b_more_io.prev);
- spin_lock(&inode->i_lock);
- spin_unlock(&wb->list_lock);
- /* This function drops i_lock... */
- inode_sleep_on_writeback(inode);
- spin_lock(&wb->list_lock);
- }
+ trace_writeback_wait(wb, work);
+ inode = wb_inode(wb->b_more_io.prev);
+ spin_lock(&inode->i_lock);
+ spin_unlock(&wb->list_lock);
+ /* This function drops i_lock... */
+ inode_sleep_on_writeback(inode);
+ spin_lock(&wb->list_lock);
}
spin_unlock(&wb->list_lock);
blk_finish_plug(&plug);
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index c5c5b9748ea3..9a88984f9f6f 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -1950,8 +1950,7 @@ static void ocfs2_write_end_inline(struct inode *inode, loff_t pos,
}
int ocfs2_write_end_nolock(struct address_space *mapping,
- loff_t pos, unsigned len, unsigned copied,
- struct page *page, void *fsdata)
+ loff_t pos, unsigned len, unsigned copied, void *fsdata)
{
int i, ret;
unsigned from, to, start = pos & (PAGE_SIZE - 1);
@@ -2064,7 +2063,7 @@ static int ocfs2_write_end(struct file *file, struct address_space *mapping,
int ret;
struct inode *inode = mapping->host;
- ret = ocfs2_write_end_nolock(mapping, pos, len, copied, page, fsdata);
+ ret = ocfs2_write_end_nolock(mapping, pos, len, copied, fsdata);
up_write(&OCFS2_I(inode)->ip_alloc_sem);
ocfs2_inode_unlock(inode, 1);
@@ -2241,7 +2240,7 @@ static int ocfs2_dio_get_block(struct inode *inode, sector_t iblock,
dwc->dw_zero_count++;
}
- ret = ocfs2_write_end_nolock(inode->i_mapping, pos, len, len, NULL, wc);
+ ret = ocfs2_write_end_nolock(inode->i_mapping, pos, len, len, wc);
BUG_ON(ret != len);
ret = 0;
unlock:
diff --git a/fs/ocfs2/aops.h b/fs/ocfs2/aops.h
index b1c9f28a57b1..8614ff069d99 100644
--- a/fs/ocfs2/aops.h
+++ b/fs/ocfs2/aops.h
@@ -44,8 +44,7 @@ int walk_page_buffers( handle_t *handle,
struct buffer_head *bh));
int ocfs2_write_end_nolock(struct address_space *mapping,
- loff_t pos, unsigned len, unsigned copied,
- struct page *page, void *fsdata);
+ loff_t pos, unsigned len, unsigned copied, void *fsdata);
typedef enum {
OCFS2_WRITE_BUFFER = 0,
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index 636abcbd4650..9158c9825094 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -741,7 +741,7 @@ static inline void o2hb_prepare_block(struct o2hb_region *reg,
hb_block = (struct o2hb_disk_heartbeat_block *)slot->ds_raw_block;
memset(hb_block, 0, reg->hr_block_bytes);
/* TODO: time stuff */
- cputime = CURRENT_TIME.tv_sec;
+ cputime = ktime_get_real_seconds();
if (!cputime)
cputime = 1;
diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index 3f828a187049..a464c8088170 100644
--- a/fs/ocfs2/dlm/dlmmaster.c
+++ b/fs/ocfs2/dlm/dlmmaster.c
@@ -1609,8 +1609,6 @@ way_up_top:
__dlm_insert_mle(dlm, mle);
response = DLM_MASTER_RESP_NO;
} else {
- // mlog(0, "mle was found\n");
- set_maybe = 1;
spin_lock(&tmpmle->spinlock);
if (tmpmle->master == dlm->node_num) {
mlog(ML_ERROR, "no lockres, but an mle with this node as master!\n");
@@ -1625,8 +1623,7 @@ way_up_top:
response = DLM_MASTER_RESP_NO;
} else
response = DLM_MASTER_RESP_MAYBE;
- if (set_maybe)
- set_bit(request->node_idx, tmpmle->maybe_map);
+ set_bit(request->node_idx, tmpmle->maybe_map);
spin_unlock(&tmpmle->spinlock);
}
spin_unlock(&dlm->master_lock);
@@ -1644,12 +1641,6 @@ send_response:
* dlm_assert_master_worker() isn't called, we drop it here.
*/
if (dispatch_assert) {
- if (response != DLM_MASTER_RESP_YES)
- mlog(ML_ERROR, "invalid response %d\n", response);
- if (!res) {
- mlog(ML_ERROR, "bad lockres while trying to assert!\n");
- BUG();
- }
mlog(0, "%u is the owner of %.*s, cleaning everyone else\n",
dlm->node_num, res->lockname.len, res->lockname.name);
spin_lock(&res->spinlock);
diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index dd5cb8bcefd1..74407c6dd592 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -2966,8 +2966,6 @@ int dlm_finalize_reco_handler(struct o2net_msg *msg, u32 len, void *data,
spin_unlock(&dlm->spinlock);
dlm_kick_recovery_thread(dlm);
break;
- default:
- BUG();
}
mlog(0, "%s: recovery done, reco master was %u, dead now %u, master now %u\n",
diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index c56a7679df93..382401d3e88f 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -703,7 +703,7 @@ static int ocfs2_remove_inode(struct inode *inode,
goto bail_commit;
}
- di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec);
+ di->i_dtime = cpu_to_le64(ktime_get_real_seconds());
di->i_flags &= cpu_to_le32(~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
ocfs2_journal_dirty(handle, di_bh);
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index a244f14c6b87..d5e5fa7f0743 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -1947,7 +1947,7 @@ static void ocfs2_queue_orphan_scan(struct ocfs2_super *osb)
*/
seqno++;
os->os_count++;
- os->os_scantime = CURRENT_TIME;
+ os->os_scantime = ktime_get_seconds();
unlock:
ocfs2_orphan_scan_unlock(osb, seqno);
out:
@@ -2004,7 +2004,7 @@ void ocfs2_orphan_scan_start(struct ocfs2_super *osb)
struct ocfs2_orphan_scan *os;
os = &osb->osb_orphan_scan;
- os->os_scantime = CURRENT_TIME;
+ os->os_scantime = ktime_get_seconds();
if (ocfs2_is_hard_readonly(osb) || ocfs2_mount_local(osb))
atomic_set(&os->os_state, ORPHAN_SCAN_INACTIVE);
else {
diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c
index 71545ad4628c..429088786e93 100644
--- a/fs/ocfs2/mmap.c
+++ b/fs/ocfs2/mmap.c
@@ -120,8 +120,7 @@ static int __ocfs2_page_mkwrite(struct file *file, struct buffer_head *di_bh,
ret = VM_FAULT_NOPAGE;
goto out;
}
- ret = ocfs2_write_end_nolock(mapping, pos, len, len, locked_page,
- fsdata);
+ ret = ocfs2_write_end_nolock(mapping, pos, len, len, fsdata);
BUG_ON(ret != len);
ret = VM_FAULT_LOCKED;
out:
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index 8d887c75765c..3b0a10d9b36f 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -516,6 +516,7 @@ static int __ocfs2_mknod_locked(struct inode *dir,
struct ocfs2_extent_list *fel;
u16 feat;
struct ocfs2_inode_info *oi = OCFS2_I(inode);
+ struct timespec64 ts;
*new_fe_bh = NULL;
@@ -564,10 +565,11 @@ static int __ocfs2_mknod_locked(struct inode *dir,
fe->i_last_eb_blk = 0;
strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
+ ktime_get_real_ts64(&ts);
fe->i_atime = fe->i_ctime = fe->i_mtime =
- cpu_to_le64(CURRENT_TIME.tv_sec);
+ cpu_to_le64(ts.tv_sec);
fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
- cpu_to_le32(CURRENT_TIME.tv_nsec);
+ cpu_to_le32(ts.tv_nsec);
fe->i_dtime = 0;
/*
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index e63af7ddfe68..7e5958b0be6b 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -224,7 +224,7 @@ struct ocfs2_orphan_scan {
struct ocfs2_super *os_osb;
struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */
struct delayed_work os_orphan_scan_work;
- struct timespec os_scantime; /* time this node ran the scan */
+ time64_t os_scantime; /* time this node ran the scan */
u32 os_count; /* tracks node specific scans */
u32 os_seqno; /* tracks cluster wide scans */
atomic_t os_state; /* ACTIVE or INACTIVE */
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index 19238512a324..738b4ea8e990 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -478,7 +478,6 @@ again:
if (ret) {
mlog_errno(ret);
ocfs2_unlock_refcount_tree(osb, tree, rw);
- ocfs2_refcount_tree_put(tree);
goto out;
}
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index f56fe39fab04..c894d945b084 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -337,7 +337,7 @@ static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
out += snprintf(buf + out, len - out, "Disabled\n");
else
out += snprintf(buf + out, len - out, "%lu seconds ago\n",
- (get_seconds() - os->os_scantime.tv_sec));
+ (unsigned long)(ktime_get_seconds() - os->os_scantime));
out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
"Slots", "Num", "RecoGen");
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 81818adb8e9e..51a4213afa2e 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -245,7 +245,7 @@ void render_sigset_t(struct seq_file *m, const char *header,
if (sigismember(set, i+2)) x |= 2;
if (sigismember(set, i+3)) x |= 4;
if (sigismember(set, i+4)) x |= 8;
- seq_printf(m, "%x", x);
+ seq_putc(m, hex_asc[x]);
} while (i >= 4);
seq_putc(m, '\n');
@@ -342,10 +342,11 @@ static inline void task_cap(struct seq_file *m, struct task_struct *p)
static inline void task_seccomp(struct seq_file *m, struct task_struct *p)
{
+ seq_put_decimal_ull(m, "NoNewPrivs:\t", task_no_new_privs(p));
#ifdef CONFIG_SECCOMP
- seq_put_decimal_ull(m, "Seccomp:\t", p->seccomp.mode);
- seq_putc(m, '\n');
+ seq_put_decimal_ull(m, "\nSeccomp:\t", p->seccomp.mode);
#endif
+ seq_putc(m, '\n');
}
static inline void task_context_switch_counts(struct seq_file *m,
diff --git a/fs/proc/base.c b/fs/proc/base.c
index ca651ac00660..9b99df4893a4 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -104,9 +104,12 @@
* in /proc for a task before it execs a suid executable.
*/
+static u8 nlink_tid;
+static u8 nlink_tgid;
+
struct pid_entry {
const char *name;
- int len;
+ unsigned int len;
umode_t mode;
const struct inode_operations *iop;
const struct file_operations *fop;
@@ -139,13 +142,13 @@ struct pid_entry {
* Count the number of hardlinks for the pid_entry table, excluding the .
* and .. links.
*/
-static unsigned int pid_entry_count_dirs(const struct pid_entry *entries,
+static unsigned int __init pid_entry_nlink(const struct pid_entry *entries,
unsigned int n)
{
unsigned int i;
unsigned int count;
- count = 0;
+ count = 2;
for (i = 0; i < n; ++i) {
if (S_ISDIR(entries[i].mode))
++count;
@@ -1967,7 +1970,7 @@ out:
struct map_files_info {
fmode_t mode;
- unsigned long len;
+ unsigned int len;
unsigned char name[4*sizeof(long)+2]; /* max: %lx-%lx\0 */
};
@@ -2412,14 +2415,14 @@ static struct dentry *proc_pident_lookup(struct inode *dir,
* Yes, it does not scale. And it should not. Don't add
* new entries into /proc/<tgid>/ without very good reasons.
*/
- last = &ents[nents - 1];
- for (p = ents; p <= last; p++) {
+ last = &ents[nents];
+ for (p = ents; p < last; p++) {
if (p->len != dentry->d_name.len)
continue;
if (!memcmp(dentry->d_name.name, p->name, p->len))
break;
}
- if (p > last)
+ if (p >= last)
goto out;
error = proc_pident_instantiate(dir, dentry, task, p);
@@ -2444,7 +2447,7 @@ static int proc_pident_readdir(struct file *file, struct dir_context *ctx,
if (ctx->pos >= nents + 2)
goto out;
- for (p = ents + (ctx->pos - 2); p <= ents + nents - 1; p++) {
+ for (p = ents + (ctx->pos - 2); p < ents + nents; p++) {
if (!proc_fill_cache(file, ctx, p->name, p->len,
proc_pident_instantiate, task, p))
break;
@@ -3068,8 +3071,7 @@ static int proc_pid_instantiate(struct inode *dir,
inode->i_fop = &proc_tgid_base_operations;
inode->i_flags|=S_IMMUTABLE;
- set_nlink(inode, 2 + pid_entry_count_dirs(tgid_base_stuff,
- ARRAY_SIZE(tgid_base_stuff)));
+ set_nlink(inode, nlink_tgid);
d_set_d_op(dentry, &pid_dentry_operations);
@@ -3361,8 +3363,7 @@ static int proc_task_instantiate(struct inode *dir,
inode->i_fop = &proc_tid_base_operations;
inode->i_flags|=S_IMMUTABLE;
- set_nlink(inode, 2 + pid_entry_count_dirs(tid_base_stuff,
- ARRAY_SIZE(tid_base_stuff)));
+ set_nlink(inode, nlink_tid);
d_set_d_op(dentry, &pid_dentry_operations);
@@ -3552,3 +3553,9 @@ static const struct file_operations proc_task_operations = {
.iterate_shared = proc_task_readdir,
.llseek = generic_file_llseek,
};
+
+void __init set_proc_pid_nlink(void)
+{
+ nlink_tid = pid_entry_nlink(tid_base_stuff, ARRAY_SIZE(tid_base_stuff));
+ nlink_tgid = pid_entry_nlink(tgid_base_stuff, ARRAY_SIZE(tgid_base_stuff));
+}
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index e69ebe648a34..783bc19644d1 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -138,6 +138,16 @@ static void unuse_pde(struct proc_dir_entry *pde)
/* pde is locked */
static void close_pdeo(struct proc_dir_entry *pde, struct pde_opener *pdeo)
{
+ /*
+ * close() (proc_reg_release()) can't delete an entry and proceed:
+ * ->release hook needs to be available at the right moment.
+ *
+ * rmmod (remove_proc_entry() et al) can't delete an entry and proceed:
+ * "struct file" needs to be available at the right moment.
+ *
+ * Therefore, first process to enter this function does ->release() and
+ * signals its completion to the other process which does nothing.
+ */
if (pdeo->closing) {
/* somebody else is doing that, just wait */
DECLARE_COMPLETION_ONSTACK(c);
@@ -147,12 +157,13 @@ static void close_pdeo(struct proc_dir_entry *pde, struct pde_opener *pdeo)
spin_lock(&pde->pde_unload_lock);
} else {
struct file *file;
- pdeo->closing = 1;
+ pdeo->closing = true;
spin_unlock(&pde->pde_unload_lock);
file = pdeo->file;
pde->proc_fops->release(file_inode(file), file);
spin_lock(&pde->pde_unload_lock);
- list_del_init(&pdeo->lh);
+ /* After ->release. */
+ list_del(&pdeo->lh);
if (pdeo->c)
complete(pdeo->c);
kfree(pdeo);
@@ -167,6 +178,8 @@ void proc_entry_rundown(struct proc_dir_entry *de)
if (atomic_add_return(BIAS, &de->in_use) != BIAS)
wait_for_completion(&c);
+ /* ->pde_openers list can't grow from now on. */
+
spin_lock(&de->pde_unload_lock);
while (!list_empty(&de->pde_openers)) {
struct pde_opener *pdeo;
@@ -312,16 +325,17 @@ static int proc_reg_open(struct inode *inode, struct file *file)
struct pde_opener *pdeo;
/*
- * What for, you ask? Well, we can have open, rmmod, remove_proc_entry
- * sequence. ->release won't be called because ->proc_fops will be
- * cleared. Depending on complexity of ->release, consequences vary.
+ * Ensure that
+ * 1) PDE's ->release hook will be called no matter what
+ * either normally by close()/->release, or forcefully by
+ * rmmod/remove_proc_entry.
+ *
+ * 2) rmmod isn't blocked by opening file in /proc and sitting on
+ * the descriptor (including "rmmod foo </proc/foo" scenario).
*
- * We can't wait for mercy when close will be done for real, it's
- * deadlockable: rmmod foo </proc/foo . So, we're going to do ->release
- * by hand in remove_proc_entry(). For this, save opener's credentials
- * for later.
+ * Save every "struct file" with custom ->release hook.
*/
- pdeo = kzalloc(sizeof(struct pde_opener), GFP_KERNEL);
+ pdeo = kmalloc(sizeof(struct pde_opener), GFP_KERNEL);
if (!pdeo)
return -ENOMEM;
@@ -338,7 +352,8 @@ static int proc_reg_open(struct inode *inode, struct file *file)
if (rv == 0 && release) {
/* To know what to release. */
pdeo->file = file;
- /* Strictly for "too late" ->release in proc_reg_release(). */
+ pdeo->closing = false;
+ pdeo->c = NULL;
spin_lock(&pde->pde_unload_lock);
list_add(&pdeo->lh, &pde->pde_openers);
spin_unlock(&pde->pde_unload_lock);
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 5378441ec1b7..bbba5d22aada 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -203,7 +203,7 @@ struct proc_dir_entry *proc_create_mount_point(const char *name);
struct pde_opener {
struct file *file;
struct list_head lh;
- int closing;
+ bool closing;
struct completion *c;
};
extern const struct inode_operations proc_link_inode_operations;
@@ -211,6 +211,7 @@ extern const struct inode_operations proc_link_inode_operations;
extern const struct inode_operations proc_pid_link_inode_operations;
extern void proc_init_inodecache(void);
+void set_proc_pid_nlink(void);
extern struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *);
extern int proc_fill_super(struct super_block *, void *data, int flags);
extern void proc_entry_rundown(struct proc_dir_entry *);
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 8d3e484055a6..4bd0373576b5 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -122,6 +122,7 @@ void __init proc_root_init(void)
int err;
proc_init_inodecache();
+ set_proc_pid_nlink();
err = register_filesystem(&proc_fs_type);
if (err)
return;
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 35b92d81692f..958f32545064 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -1588,6 +1588,7 @@ static int gather_pte_stats(pmd_t *pmd, unsigned long addr,
} while (pte++, addr += PAGE_SIZE, addr != end);
pte_unmap_unlock(orig_pte, ptl);
+ cond_resched();
return 0;
}
#ifdef CONFIG_HUGETLB_PAGE
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 10:55:13 +0000