Where no additional specifiers are used the default little endian
order with lower case hex characters will be printed.
+dentry names:
+ %pd{,2,3,4}
+ %pD{,2,3,4}
+
+ For printing dentry name; if we race with d_move(), the name might be
+ a mix of old and new ones, but it won't oops. %pd dentry is a safer
+ equivalent of %s dentry->d_name.name we used to use, %pd<n> prints
+ n last components. %pD does the same thing for struct file.
+
struct va_format:
%pV
}
static int
-op_axp_create_files(struct super_block *sb, struct dentry *root)
+op_axp_create_files(struct dentry *root)
{
int i;
char buf[4];
snprintf(buf, sizeof buf, "%d", i);
- dir = oprofilefs_mkdir(sb, root, buf);
+ dir = oprofilefs_mkdir(root, buf);
- oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
- oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
- oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
+ oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled);
+ oprofilefs_create_ulong(dir, "event", &ctr[i].event);
+ oprofilefs_create_ulong(dir, "count", &ctr[i].count);
/* Dummies. */
- oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
- oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
- oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
+ oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel);
+ oprofilefs_create_ulong(dir, "user", &ctr[i].user);
+ oprofilefs_create_ulong(dir, "unit_mask", &ctr[i].unit_mask);
}
if (model->can_set_proc_mode) {
- oprofilefs_create_ulong(sb, root, "enable_pal",
+ oprofilefs_create_ulong(root, "enable_pal",
&sys.enable_pal);
- oprofilefs_create_ulong(sb, root, "enable_kernel",
+ oprofilefs_create_ulong(root, "enable_kernel",
&sys.enable_kernel);
- oprofilefs_create_ulong(sb, root, "enable_user",
+ oprofilefs_create_ulong(root, "enable_user",
&sys.enable_user);
}
return IRQ_HANDLED;
}
-static int avr32_perf_counter_create_files(struct super_block *sb,
- struct dentry *root)
+static int avr32_perf_counter_create_files(struct dentry *root)
{
struct dentry *dir;
unsigned int i;
for (i = 0; i < NR_counter; i++) {
snprintf(filename, sizeof(filename), "%u", i);
- dir = oprofilefs_mkdir(sb, root, filename);
+ dir = oprofilefs_mkdir(root, filename);
- oprofilefs_create_ulong(sb, dir, "enabled",
+ oprofilefs_create_ulong(dir, "enabled",
&counter[i].enabled);
- oprofilefs_create_ulong(sb, dir, "event",
+ oprofilefs_create_ulong(dir, "event",
&counter[i].event);
- oprofilefs_create_ulong(sb, dir, "count",
+ oprofilefs_create_ulong(dir, "count",
&counter[i].count);
/* Dummy entries */
- oprofilefs_create_ulong(sb, dir, "kernel",
+ oprofilefs_create_ulong(dir, "kernel",
&counter[i].kernel);
- oprofilefs_create_ulong(sb, dir, "user",
+ oprofilefs_create_ulong(dir, "user",
&counter[i].user);
- oprofilefs_create_ulong(sb, dir, "unit_mask",
+ oprofilefs_create_ulong(dir, "unit_mask",
&counter[i].unit_mask);
}
return 0;
}
-static int op_mips_create_files(struct super_block *sb, struct dentry *root)
+static int op_mips_create_files(struct dentry *root)
{
int i;
char buf[4];
snprintf(buf, sizeof buf, "%d", i);
- dir = oprofilefs_mkdir(sb, root, buf);
-
- oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
- oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
- oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
- oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
- oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
- oprofilefs_create_ulong(sb, dir, "exl", &ctr[i].exl);
+ dir = oprofilefs_mkdir(root, buf);
+
+ oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled);
+ oprofilefs_create_ulong(dir, "event", &ctr[i].event);
+ oprofilefs_create_ulong(dir, "count", &ctr[i].count);
+ oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel);
+ oprofilefs_create_ulong(dir, "user", &ctr[i].user);
+ oprofilefs_create_ulong(dir, "exl", &ctr[i].exl);
/* Dummy. */
- oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
+ oprofilefs_create_ulong(dir, "unit_mask", &ctr[i].unit_mask);
}
return 0;
#endif
#ifdef CONFIG_KVM_MPIC
case KVM_CAP_IRQ_MPIC: {
- struct file *filp;
+ struct fd f;
struct kvm_device *dev;
r = -EBADF;
- filp = fget(cap->args[0]);
- if (!filp)
+ f = fdget(cap->args[0]);
+ if (!f.file)
break;
r = -EPERM;
- dev = kvm_device_from_filp(filp);
+ dev = kvm_device_from_filp(f.file);
if (dev)
r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
- fput(filp);
+ fdput(f);
break;
}
#endif
#ifdef CONFIG_KVM_XICS
case KVM_CAP_IRQ_XICS: {
- struct file *filp;
+ struct fd f;
struct kvm_device *dev;
r = -EBADF;
- filp = fget(cap->args[0]);
- if (!filp)
+ f = fdget(cap->args[0]);
+ if (!f.file)
break;
r = -EPERM;
- dev = kvm_device_from_filp(filp);
+ dev = kvm_device_from_filp(f.file);
if (dev)
r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
- fput(filp);
+ fdput(f);
break;
}
#endif /* CONFIG_KVM_XICS */
model->global_stop();
}
-static int op_powerpc_create_files(struct super_block *sb, struct dentry *root)
+static int op_powerpc_create_files(struct dentry *root)
{
int i;
* There is one mmcr0, mmcr1 and mmcra for setting the events for
* all of the counters.
*/
- oprofilefs_create_ulong(sb, root, "mmcr0", &sys.mmcr0);
- oprofilefs_create_ulong(sb, root, "mmcr1", &sys.mmcr1);
- oprofilefs_create_ulong(sb, root, "mmcra", &sys.mmcra);
+ oprofilefs_create_ulong(root, "mmcr0", &sys.mmcr0);
+ oprofilefs_create_ulong(root, "mmcr1", &sys.mmcr1);
+ oprofilefs_create_ulong(root, "mmcra", &sys.mmcra);
#ifdef CONFIG_OPROFILE_CELL
/* create a file the user tool can check to see what level of profiling
* support exits with this kernel. Initialize bit mask to indicate
* If the file does not exist, then the kernel only supports SPU
* cycle profiling, PPU event and cycle profiling.
*/
- oprofilefs_create_ulong(sb, root, "cell_support", &sys.cell_support);
+ oprofilefs_create_ulong(root, "cell_support", &sys.cell_support);
sys.cell_support = 0x1; /* Note, the user OProfile tool must check
* that this bit is set before attempting to
* user SPU event profiling. Older kernels
char buf[4];
snprintf(buf, sizeof buf, "%d", i);
- dir = oprofilefs_mkdir(sb, root, buf);
+ dir = oprofilefs_mkdir(root, buf);
- oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
- oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
- oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
+ oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled);
+ oprofilefs_create_ulong(dir, "event", &ctr[i].event);
+ oprofilefs_create_ulong(dir, "count", &ctr[i].count);
/*
* Classic PowerPC doesn't support per-counter
* Book-E style performance monitors, we do
* support them.
*/
- oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
- oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
+ oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel);
+ oprofilefs_create_ulong(dir, "user", &ctr[i].user);
- oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
+ oprofilefs_create_ulong(dir, "unit_mask", &ctr[i].unit_mask);
}
- oprofilefs_create_ulong(sb, root, "enable_kernel", &sys.enable_kernel);
- oprofilefs_create_ulong(sb, root, "enable_user", &sys.enable_user);
+ oprofilefs_create_ulong(root, "enable_kernel", &sys.enable_kernel);
+ oprofilefs_create_ulong(root, "enable_user", &sys.enable_user);
/* Default to tracing both kernel and user */
sys.enable_kernel = 1;
#define UPDATE_FILE_MODE 0220
#define DIR_MODE 0550
-extern struct dentry *hypfs_mkdir(struct super_block *sb, struct dentry *parent,
- const char *name);
+extern struct dentry *hypfs_mkdir(struct dentry *parent, const char *name);
-extern struct dentry *hypfs_create_u64(struct super_block *sb,
- struct dentry *dir, const char *name,
+extern struct dentry *hypfs_create_u64(struct dentry *dir, const char *name,
__u64 value);
-extern struct dentry *hypfs_create_str(struct super_block *sb,
- struct dentry *dir, const char *name,
+extern struct dentry *hypfs_create_str(struct dentry *dir, const char *name,
char *string);
/* LPAR Hypervisor */
extern int hypfs_diag_init(void);
extern void hypfs_diag_exit(void);
-extern int hypfs_diag_create_files(struct super_block *sb, struct dentry *root);
+extern int hypfs_diag_create_files(struct dentry *root);
/* VM Hypervisor */
extern int hypfs_vm_init(void);
extern void hypfs_vm_exit(void);
-extern int hypfs_vm_create_files(struct super_block *sb, struct dentry *root);
+extern int hypfs_vm_create_files(struct dentry *root);
/* debugfs interface */
struct hypfs_dbfs_file;
* *******************************************
*/
-static int hypfs_create_cpu_files(struct super_block *sb,
- struct dentry *cpus_dir, void *cpu_info)
+static int hypfs_create_cpu_files(struct dentry *cpus_dir, void *cpu_info)
{
struct dentry *cpu_dir;
char buffer[TMP_SIZE];
snprintf(buffer, TMP_SIZE, "%d", cpu_info__cpu_addr(diag204_info_type,
cpu_info));
- cpu_dir = hypfs_mkdir(sb, cpus_dir, buffer);
- rc = hypfs_create_u64(sb, cpu_dir, "mgmtime",
+ cpu_dir = hypfs_mkdir(cpus_dir, buffer);
+ rc = hypfs_create_u64(cpu_dir, "mgmtime",
cpu_info__acc_time(diag204_info_type, cpu_info) -
cpu_info__lp_time(diag204_info_type, cpu_info));
if (IS_ERR(rc))
return PTR_ERR(rc);
- rc = hypfs_create_u64(sb, cpu_dir, "cputime",
+ rc = hypfs_create_u64(cpu_dir, "cputime",
cpu_info__lp_time(diag204_info_type, cpu_info));
if (IS_ERR(rc))
return PTR_ERR(rc);
if (diag204_info_type == INFO_EXT) {
- rc = hypfs_create_u64(sb, cpu_dir, "onlinetime",
+ rc = hypfs_create_u64(cpu_dir, "onlinetime",
cpu_info__online_time(diag204_info_type,
cpu_info));
if (IS_ERR(rc))
return PTR_ERR(rc);
}
diag224_idx2name(cpu_info__ctidx(diag204_info_type, cpu_info), buffer);
- rc = hypfs_create_str(sb, cpu_dir, "type", buffer);
+ rc = hypfs_create_str(cpu_dir, "type", buffer);
return PTR_RET(rc);
}
-static void *hypfs_create_lpar_files(struct super_block *sb,
- struct dentry *systems_dir, void *part_hdr)
+static void *hypfs_create_lpar_files(struct dentry *systems_dir, void *part_hdr)
{
struct dentry *cpus_dir;
struct dentry *lpar_dir;
part_hdr__part_name(diag204_info_type, part_hdr, lpar_name);
lpar_name[LPAR_NAME_LEN] = 0;
- lpar_dir = hypfs_mkdir(sb, systems_dir, lpar_name);
+ lpar_dir = hypfs_mkdir(systems_dir, lpar_name);
if (IS_ERR(lpar_dir))
return lpar_dir;
- cpus_dir = hypfs_mkdir(sb, lpar_dir, "cpus");
+ cpus_dir = hypfs_mkdir(lpar_dir, "cpus");
if (IS_ERR(cpus_dir))
return cpus_dir;
cpu_info = part_hdr + part_hdr__size(diag204_info_type);
for (i = 0; i < part_hdr__rcpus(diag204_info_type, part_hdr); i++) {
int rc;
- rc = hypfs_create_cpu_files(sb, cpus_dir, cpu_info);
+ rc = hypfs_create_cpu_files(cpus_dir, cpu_info);
if (rc)
return ERR_PTR(rc);
cpu_info += cpu_info__size(diag204_info_type);
return cpu_info;
}
-static int hypfs_create_phys_cpu_files(struct super_block *sb,
- struct dentry *cpus_dir, void *cpu_info)
+static int hypfs_create_phys_cpu_files(struct dentry *cpus_dir, void *cpu_info)
{
struct dentry *cpu_dir;
char buffer[TMP_SIZE];
snprintf(buffer, TMP_SIZE, "%i", phys_cpu__cpu_addr(diag204_info_type,
cpu_info));
- cpu_dir = hypfs_mkdir(sb, cpus_dir, buffer);
+ cpu_dir = hypfs_mkdir(cpus_dir, buffer);
if (IS_ERR(cpu_dir))
return PTR_ERR(cpu_dir);
- rc = hypfs_create_u64(sb, cpu_dir, "mgmtime",
+ rc = hypfs_create_u64(cpu_dir, "mgmtime",
phys_cpu__mgm_time(diag204_info_type, cpu_info));
if (IS_ERR(rc))
return PTR_ERR(rc);
diag224_idx2name(phys_cpu__ctidx(diag204_info_type, cpu_info), buffer);
- rc = hypfs_create_str(sb, cpu_dir, "type", buffer);
+ rc = hypfs_create_str(cpu_dir, "type", buffer);
return PTR_RET(rc);
}
-static void *hypfs_create_phys_files(struct super_block *sb,
- struct dentry *parent_dir, void *phys_hdr)
+static void *hypfs_create_phys_files(struct dentry *parent_dir, void *phys_hdr)
{
int i;
void *cpu_info;
struct dentry *cpus_dir;
- cpus_dir = hypfs_mkdir(sb, parent_dir, "cpus");
+ cpus_dir = hypfs_mkdir(parent_dir, "cpus");
if (IS_ERR(cpus_dir))
return cpus_dir;
cpu_info = phys_hdr + phys_hdr__size(diag204_info_type);
for (i = 0; i < phys_hdr__cpus(diag204_info_type, phys_hdr); i++) {
int rc;
- rc = hypfs_create_phys_cpu_files(sb, cpus_dir, cpu_info);
+ rc = hypfs_create_phys_cpu_files(cpus_dir, cpu_info);
if (rc)
return ERR_PTR(rc);
cpu_info += phys_cpu__size(diag204_info_type);
return cpu_info;
}
-int hypfs_diag_create_files(struct super_block *sb, struct dentry *root)
+int hypfs_diag_create_files(struct dentry *root)
{
struct dentry *systems_dir, *hyp_dir;
void *time_hdr, *part_hdr;
if (IS_ERR(buffer))
return PTR_ERR(buffer);
- systems_dir = hypfs_mkdir(sb, root, "systems");
+ systems_dir = hypfs_mkdir(root, "systems");
if (IS_ERR(systems_dir)) {
rc = PTR_ERR(systems_dir);
goto err_out;
time_hdr = (struct x_info_blk_hdr *)buffer;
part_hdr = time_hdr + info_blk_hdr__size(diag204_info_type);
for (i = 0; i < info_blk_hdr__npar(diag204_info_type, time_hdr); i++) {
- part_hdr = hypfs_create_lpar_files(sb, systems_dir, part_hdr);
+ part_hdr = hypfs_create_lpar_files(systems_dir, part_hdr);
if (IS_ERR(part_hdr)) {
rc = PTR_ERR(part_hdr);
goto err_out;
}
}
if (info_blk_hdr__flags(diag204_info_type, time_hdr) & LPAR_PHYS_FLG) {
- ptr = hypfs_create_phys_files(sb, root, part_hdr);
+ ptr = hypfs_create_phys_files(root, part_hdr);
if (IS_ERR(ptr)) {
rc = PTR_ERR(ptr);
goto err_out;
}
}
- hyp_dir = hypfs_mkdir(sb, root, "hyp");
+ hyp_dir = hypfs_mkdir(root, "hyp");
if (IS_ERR(hyp_dir)) {
rc = PTR_ERR(hyp_dir);
goto err_out;
}
- ptr = hypfs_create_str(sb, hyp_dir, "type", "LPAR Hypervisor");
+ ptr = hypfs_create_str(hyp_dir, "type", "LPAR Hypervisor");
if (IS_ERR(ptr)) {
rc = PTR_ERR(ptr);
goto err_out;
vfree(data);
}
-#define ATTRIBUTE(sb, dir, name, member) \
+#define ATTRIBUTE(dir, name, member) \
do { \
void *rc; \
- rc = hypfs_create_u64(sb, dir, name, member); \
+ rc = hypfs_create_u64(dir, name, member); \
if (IS_ERR(rc)) \
return PTR_ERR(rc); \
} while(0)
-static int hpyfs_vm_create_guest(struct super_block *sb,
- struct dentry *systems_dir,
+static int hpyfs_vm_create_guest(struct dentry *systems_dir,
struct diag2fc_data *data)
{
char guest_name[NAME_LEN + 1] = {};
memcpy(guest_name, data->guest_name, NAME_LEN);
EBCASC(guest_name, NAME_LEN);
strim(guest_name);
- guest_dir = hypfs_mkdir(sb, systems_dir, guest_name);
+ guest_dir = hypfs_mkdir(systems_dir, guest_name);
if (IS_ERR(guest_dir))
return PTR_ERR(guest_dir);
- ATTRIBUTE(sb, guest_dir, "onlinetime_us", data->el_time);
+ ATTRIBUTE(guest_dir, "onlinetime_us", data->el_time);
/* logical cpu information */
- cpus_dir = hypfs_mkdir(sb, guest_dir, "cpus");
+ cpus_dir = hypfs_mkdir(guest_dir, "cpus");
if (IS_ERR(cpus_dir))
return PTR_ERR(cpus_dir);
- ATTRIBUTE(sb, cpus_dir, "cputime_us", data->used_cpu);
- ATTRIBUTE(sb, cpus_dir, "capped", capped_value);
- ATTRIBUTE(sb, cpus_dir, "dedicated", dedicated_flag);
- ATTRIBUTE(sb, cpus_dir, "count", data->vcpus);
- ATTRIBUTE(sb, cpus_dir, "weight_min", data->cpu_min);
- ATTRIBUTE(sb, cpus_dir, "weight_max", data->cpu_max);
- ATTRIBUTE(sb, cpus_dir, "weight_cur", data->cpu_shares);
+ ATTRIBUTE(cpus_dir, "cputime_us", data->used_cpu);
+ ATTRIBUTE(cpus_dir, "capped", capped_value);
+ ATTRIBUTE(cpus_dir, "dedicated", dedicated_flag);
+ ATTRIBUTE(cpus_dir, "count", data->vcpus);
+ ATTRIBUTE(cpus_dir, "weight_min", data->cpu_min);
+ ATTRIBUTE(cpus_dir, "weight_max", data->cpu_max);
+ ATTRIBUTE(cpus_dir, "weight_cur", data->cpu_shares);
/* memory information */
- mem_dir = hypfs_mkdir(sb, guest_dir, "mem");
+ mem_dir = hypfs_mkdir(guest_dir, "mem");
if (IS_ERR(mem_dir))
return PTR_ERR(mem_dir);
- ATTRIBUTE(sb, mem_dir, "min_KiB", data->mem_min_kb);
- ATTRIBUTE(sb, mem_dir, "max_KiB", data->mem_max_kb);
- ATTRIBUTE(sb, mem_dir, "used_KiB", data->mem_used_kb);
- ATTRIBUTE(sb, mem_dir, "share_KiB", data->mem_share_kb);
+ ATTRIBUTE(mem_dir, "min_KiB", data->mem_min_kb);
+ ATTRIBUTE(mem_dir, "max_KiB", data->mem_max_kb);
+ ATTRIBUTE(mem_dir, "used_KiB", data->mem_used_kb);
+ ATTRIBUTE(mem_dir, "share_KiB", data->mem_share_kb);
/* samples */
- samples_dir = hypfs_mkdir(sb, guest_dir, "samples");
+ samples_dir = hypfs_mkdir(guest_dir, "samples");
if (IS_ERR(samples_dir))
return PTR_ERR(samples_dir);
- ATTRIBUTE(sb, samples_dir, "cpu_using", data->cpu_use_samp);
- ATTRIBUTE(sb, samples_dir, "cpu_delay", data->cpu_delay_samp);
- ATTRIBUTE(sb, samples_dir, "mem_delay", data->page_wait_samp);
- ATTRIBUTE(sb, samples_dir, "idle", data->idle_samp);
- ATTRIBUTE(sb, samples_dir, "other", data->other_samp);
- ATTRIBUTE(sb, samples_dir, "total", data->total_samp);
+ ATTRIBUTE(samples_dir, "cpu_using", data->cpu_use_samp);
+ ATTRIBUTE(samples_dir, "cpu_delay", data->cpu_delay_samp);
+ ATTRIBUTE(samples_dir, "mem_delay", data->page_wait_samp);
+ ATTRIBUTE(samples_dir, "idle", data->idle_samp);
+ ATTRIBUTE(samples_dir, "other", data->other_samp);
+ ATTRIBUTE(samples_dir, "total", data->total_samp);
return 0;
}
-int hypfs_vm_create_files(struct super_block *sb, struct dentry *root)
+int hypfs_vm_create_files(struct dentry *root)
{
struct dentry *dir, *file;
struct diag2fc_data *data;
return PTR_ERR(data);
/* Hpervisor Info */
- dir = hypfs_mkdir(sb, root, "hyp");
+ dir = hypfs_mkdir(root, "hyp");
if (IS_ERR(dir)) {
rc = PTR_ERR(dir);
goto failed;
}
- file = hypfs_create_str(sb, dir, "type", "z/VM Hypervisor");
+ file = hypfs_create_str(dir, "type", "z/VM Hypervisor");
if (IS_ERR(file)) {
rc = PTR_ERR(file);
goto failed;
}
/* physical cpus */
- dir = hypfs_mkdir(sb, root, "cpus");
+ dir = hypfs_mkdir(root, "cpus");
if (IS_ERR(dir)) {
rc = PTR_ERR(dir);
goto failed;
}
- file = hypfs_create_u64(sb, dir, "count", data->lcpus);
+ file = hypfs_create_u64(dir, "count", data->lcpus);
if (IS_ERR(file)) {
rc = PTR_ERR(file);
goto failed;
}
/* guests */
- dir = hypfs_mkdir(sb, root, "systems");
+ dir = hypfs_mkdir(root, "systems");
if (IS_ERR(dir)) {
rc = PTR_ERR(dir);
goto failed;
}
for (i = 0; i < count; i++) {
- rc = hpyfs_vm_create_guest(sb, dir, &(data[i]));
+ rc = hpyfs_vm_create_guest(dir, &(data[i]));
if (rc)
goto failed;
}
#define HYPFS_MAGIC 0x687970 /* ASCII 'hyp' */
#define TMP_SIZE 64 /* size of temporary buffers */
-static struct dentry *hypfs_create_update_file(struct super_block *sb,
- struct dentry *dir);
+static struct dentry *hypfs_create_update_file(struct dentry *dir);
struct hypfs_sb_info {
kuid_t uid; /* uid used for files and dirs */
}
hypfs_delete_tree(sb->s_root);
if (MACHINE_IS_VM)
- rc = hypfs_vm_create_files(sb, sb->s_root);
+ rc = hypfs_vm_create_files(sb->s_root);
else
- rc = hypfs_diag_create_files(sb, sb->s_root);
+ rc = hypfs_diag_create_files(sb->s_root);
if (rc) {
pr_err("Updating the hypfs tree failed\n");
hypfs_delete_tree(sb->s_root);
if (!root_dentry)
return -ENOMEM;
if (MACHINE_IS_VM)
- rc = hypfs_vm_create_files(sb, root_dentry);
+ rc = hypfs_vm_create_files(root_dentry);
else
- rc = hypfs_diag_create_files(sb, root_dentry);
+ rc = hypfs_diag_create_files(root_dentry);
if (rc)
return rc;
- sbi->update_file = hypfs_create_update_file(sb, root_dentry);
+ sbi->update_file = hypfs_create_update_file(root_dentry);
if (IS_ERR(sbi->update_file))
return PTR_ERR(sbi->update_file);
hypfs_update_update(sb);
kill_litter_super(sb);
}
-static struct dentry *hypfs_create_file(struct super_block *sb,
- struct dentry *parent, const char *name,
+static struct dentry *hypfs_create_file(struct dentry *parent, const char *name,
char *data, umode_t mode)
{
struct dentry *dentry;
dentry = ERR_PTR(-ENOMEM);
goto fail;
}
- inode = hypfs_make_inode(sb, mode);
+ inode = hypfs_make_inode(parent->d_sb, mode);
if (!inode) {
dput(dentry);
dentry = ERR_PTR(-ENOMEM);
return dentry;
}
-struct dentry *hypfs_mkdir(struct super_block *sb, struct dentry *parent,
- const char *name)
+struct dentry *hypfs_mkdir(struct dentry *parent, const char *name)
{
struct dentry *dentry;
- dentry = hypfs_create_file(sb, parent, name, NULL, S_IFDIR | DIR_MODE);
+ dentry = hypfs_create_file(parent, name, NULL, S_IFDIR | DIR_MODE);
if (IS_ERR(dentry))
return dentry;
hypfs_add_dentry(dentry);
return dentry;
}
-static struct dentry *hypfs_create_update_file(struct super_block *sb,
- struct dentry *dir)
+static struct dentry *hypfs_create_update_file(struct dentry *dir)
{
struct dentry *dentry;
- dentry = hypfs_create_file(sb, dir, "update", NULL,
+ dentry = hypfs_create_file(dir, "update", NULL,
S_IFREG | UPDATE_FILE_MODE);
/*
* We do not put the update file on the 'delete' list with
return dentry;
}
-struct dentry *hypfs_create_u64(struct super_block *sb, struct dentry *dir,
+struct dentry *hypfs_create_u64(struct dentry *dir,
const char *name, __u64 value)
{
char *buffer;
if (!buffer)
return ERR_PTR(-ENOMEM);
dentry =
- hypfs_create_file(sb, dir, name, buffer, S_IFREG | REG_FILE_MODE);
+ hypfs_create_file(dir, name, buffer, S_IFREG | REG_FILE_MODE);
if (IS_ERR(dentry)) {
kfree(buffer);
return ERR_PTR(-ENOMEM);
return dentry;
}
-struct dentry *hypfs_create_str(struct super_block *sb, struct dentry *dir,
+struct dentry *hypfs_create_str(struct dentry *dir,
const char *name, char *string)
{
char *buffer;
return ERR_PTR(-ENOMEM);
sprintf(buffer, "%s\n", string);
dentry =
- hypfs_create_file(sb, dir, name, buffer, S_IFREG | REG_FILE_MODE);
+ hypfs_create_file(dir, name, buffer, S_IFREG | REG_FILE_MODE);
if (IS_ERR(dentry)) {
kfree(buffer);
return ERR_PTR(-ENOMEM);
};
-static int oprofile_create_hwsampling_files(struct super_block *sb,
- struct dentry *root)
+static int oprofile_create_hwsampling_files(struct dentry *root)
{
struct dentry *dir;
- dir = oprofilefs_mkdir(sb, root, "timer");
+ dir = oprofilefs_mkdir(root, "timer");
if (!dir)
return -EINVAL;
- oprofilefs_create_file(sb, dir, "enabled", &timer_enabled_fops);
+ oprofilefs_create_file(dir, "enabled", &timer_enabled_fops);
if (!hwsampler_available)
return 0;
* and can only be set to 0.
*/
- dir = oprofilefs_mkdir(sb, root, "0");
+ dir = oprofilefs_mkdir(root, "0");
if (!dir)
return -EINVAL;
- oprofilefs_create_file(sb, dir, "enabled", &hwsampler_fops);
- oprofilefs_create_file(sb, dir, "event", &zero_fops);
- oprofilefs_create_file(sb, dir, "count", &hw_interval_fops);
- oprofilefs_create_file(sb, dir, "unit_mask", &zero_fops);
- oprofilefs_create_file(sb, dir, "kernel", &kernel_fops);
- oprofilefs_create_file(sb, dir, "user", &user_fops);
- oprofilefs_create_ulong(sb, dir, "hw_sdbt_blocks",
+ oprofilefs_create_file(dir, "enabled", &hwsampler_fops);
+ oprofilefs_create_file(dir, "event", &zero_fops);
+ oprofilefs_create_file(dir, "count", &hw_interval_fops);
+ oprofilefs_create_file(dir, "unit_mask", &zero_fops);
+ oprofilefs_create_file(dir, "kernel", &kernel_fops);
+ oprofilefs_create_file(dir, "user", &user_fops);
+ oprofilefs_create_ulong(dir, "hw_sdbt_blocks",
&oprofile_sdbt_blocks);
} else {
* space tools. The /dev/oprofile/hwsampling fs is
* provided in that case.
*/
- dir = oprofilefs_mkdir(sb, root, "hwsampling");
+ dir = oprofilefs_mkdir(root, "hwsampling");
if (!dir)
return -EINVAL;
- oprofilefs_create_file(sb, dir, "hwsampler",
+ oprofilefs_create_file(dir, "hwsampler",
&hwsampler_fops);
- oprofilefs_create_file(sb, dir, "hw_interval",
+ oprofilefs_create_file(dir, "hw_interval",
&hw_interval_fops);
- oprofilefs_create_ro_ulong(sb, dir, "hw_min_interval",
+ oprofilefs_create_ro_ulong(dir, "hw_min_interval",
&oprofile_min_interval);
- oprofilefs_create_ro_ulong(sb, dir, "hw_max_interval",
+ oprofilefs_create_ro_ulong(dir, "hw_max_interval",
&oprofile_max_interval);
- oprofilefs_create_ulong(sb, dir, "hw_sdbt_blocks",
+ oprofilefs_create_ulong(dir, "hw_sdbt_blocks",
&oprofile_sdbt_blocks);
}
return 0;
nmi_cpu_shutdown(dummy);
}
-static int nmi_create_files(struct super_block *sb, struct dentry *root)
+static int nmi_create_files(struct dentry *root)
{
unsigned int i;
continue;
snprintf(buf, sizeof(buf), "%d", i);
- dir = oprofilefs_mkdir(sb, root, buf);
- oprofilefs_create_ulong(sb, dir, "enabled", &counter_config[i].enabled);
- oprofilefs_create_ulong(sb, dir, "event", &counter_config[i].event);
- oprofilefs_create_ulong(sb, dir, "count", &counter_config[i].count);
- oprofilefs_create_ulong(sb, dir, "unit_mask", &counter_config[i].unit_mask);
- oprofilefs_create_ulong(sb, dir, "kernel", &counter_config[i].kernel);
- oprofilefs_create_ulong(sb, dir, "user", &counter_config[i].user);
- oprofilefs_create_ulong(sb, dir, "extra", &counter_config[i].extra);
+ dir = oprofilefs_mkdir(root, buf);
+ oprofilefs_create_ulong(dir, "enabled", &counter_config[i].enabled);
+ oprofilefs_create_ulong(dir, "event", &counter_config[i].event);
+ oprofilefs_create_ulong(dir, "count", &counter_config[i].count);
+ oprofilefs_create_ulong(dir, "unit_mask", &counter_config[i].unit_mask);
+ oprofilefs_create_ulong(dir, "kernel", &counter_config[i].kernel);
+ oprofilefs_create_ulong(dir, "user", &counter_config[i].user);
+ oprofilefs_create_ulong(dir, "extra", &counter_config[i].extra);
}
return 0;
printk(KERN_INFO "oprofile: AMD IBS detected (0x%08x)\n", ibs_caps);
}
-static int (*create_arch_files)(struct super_block *sb, struct dentry *root);
+static int (*create_arch_files)(struct dentry *root);
-static int setup_ibs_files(struct super_block *sb, struct dentry *root)
+static int setup_ibs_files(struct dentry *root)
{
struct dentry *dir;
int ret = 0;
/* architecture specific files */
if (create_arch_files)
- ret = create_arch_files(sb, root);
+ ret = create_arch_files(root);
if (ret)
return ret;
ibs_config.max_cnt_op = 250000;
if (ibs_caps & IBS_CAPS_FETCHSAM) {
- dir = oprofilefs_mkdir(sb, root, "ibs_fetch");
- oprofilefs_create_ulong(sb, dir, "enable",
+ dir = oprofilefs_mkdir(root, "ibs_fetch");
+ oprofilefs_create_ulong(dir, "enable",
&ibs_config.fetch_enabled);
- oprofilefs_create_ulong(sb, dir, "max_count",
+ oprofilefs_create_ulong(dir, "max_count",
&ibs_config.max_cnt_fetch);
- oprofilefs_create_ulong(sb, dir, "rand_enable",
+ oprofilefs_create_ulong(dir, "rand_enable",
&ibs_config.rand_en);
}
if (ibs_caps & IBS_CAPS_OPSAM) {
- dir = oprofilefs_mkdir(sb, root, "ibs_op");
- oprofilefs_create_ulong(sb, dir, "enable",
+ dir = oprofilefs_mkdir(root, "ibs_op");
+ oprofilefs_create_ulong(dir, "enable",
&ibs_config.op_enabled);
- oprofilefs_create_ulong(sb, dir, "max_count",
+ oprofilefs_create_ulong(dir, "max_count",
&ibs_config.max_cnt_op);
if (ibs_caps & IBS_CAPS_OPCNT)
- oprofilefs_create_ulong(sb, dir, "dispatched_ops",
+ oprofilefs_create_ulong(dir, "dispatched_ops",
&ibs_config.dispatched_ops);
if (ibs_caps & IBS_CAPS_BRNTRGT)
- oprofilefs_create_ulong(sb, dir, "branch_target",
+ oprofilefs_create_ulong(dir, "branch_target",
&ibs_config.branch_target);
}
{
u64 started_channels = debugfs_dma_base->pm.started_channels;
int pool_count = debugfs_dma_base->pool.debugfs_pool_counter;
- int i;
- int ret = 0;
char *dev_buf;
char *tmp;
- int dev_size;
+ int ret;
+ int i;
dev_buf = kmalloc(4*1024, GFP_KERNEL);
if (dev_buf == NULL)
- goto err_kmalloc;
+ return -ENOMEM;
tmp = dev_buf;
tmp += sprintf(tmp, "DMA -- enabled dma channels\n");
tmp += sprintf(tmp, "channel %d\n", i);
tmp += sprintf(tmp, "Pool alloc nbr %d\n", pool_count);
- dev_size = tmp - dev_buf;
-
- /* No more to read if offset != 0 */
- if (*f_pos > dev_size)
- goto out;
- if (count > dev_size - *f_pos)
- count = dev_size - *f_pos;
-
- if (copy_to_user(buf, dev_buf + *f_pos, count))
- ret = -EINVAL;
- ret = count;
- *f_pos += count;
-
- out:
+ ret = simple_read_from_buffer(buf, count, f_pos, dev_buf,
+ tmp - dev_buf);
kfree(dev_buf);
return ret;
-
- err_kmalloc:
- return 0;
}
static const struct file_operations coh901318_debugfs_status_operations = {
return ret;
}
-static struct dentry *ibmasmfs_create_file (struct super_block *sb,
- struct dentry *parent,
+static struct dentry *ibmasmfs_create_file(struct dentry *parent,
const char *name,
const struct file_operations *fops,
void *data,
if (!dentry)
return NULL;
- inode = ibmasmfs_make_inode(sb, S_IFREG | mode);
+ inode = ibmasmfs_make_inode(parent->d_sb, S_IFREG | mode);
if (!inode) {
dput(dentry);
return NULL;
return dentry;
}
-static struct dentry *ibmasmfs_create_dir (struct super_block *sb,
- struct dentry *parent,
+static struct dentry *ibmasmfs_create_dir(struct dentry *parent,
const char *name)
{
struct dentry *dentry;
if (!dentry)
return NULL;
- inode = ibmasmfs_make_inode(sb, S_IFDIR | 0500);
+ inode = ibmasmfs_make_inode(parent->d_sb, S_IFDIR | 0500);
if (!inode) {
dput(dentry);
return NULL;
struct dentry *dir;
struct dentry *remote_dir;
sp = list_entry(entry, struct service_processor, node);
- dir = ibmasmfs_create_dir(sb, sb->s_root, sp->dirname);
+ dir = ibmasmfs_create_dir(sb->s_root, sp->dirname);
if (!dir)
continue;
- ibmasmfs_create_file(sb, dir, "command", &command_fops, sp, S_IRUSR|S_IWUSR);
- ibmasmfs_create_file(sb, dir, "event", &event_fops, sp, S_IRUSR|S_IWUSR);
- ibmasmfs_create_file(sb, dir, "reverse_heartbeat", &r_heartbeat_fops, sp, S_IRUSR|S_IWUSR);
+ ibmasmfs_create_file(dir, "command", &command_fops, sp, S_IRUSR|S_IWUSR);
+ ibmasmfs_create_file(dir, "event", &event_fops, sp, S_IRUSR|S_IWUSR);
+ ibmasmfs_create_file(dir, "reverse_heartbeat", &r_heartbeat_fops, sp, S_IRUSR|S_IWUSR);
- remote_dir = ibmasmfs_create_dir(sb, dir, "remote_video");
+ remote_dir = ibmasmfs_create_dir(dir, "remote_video");
if (!remote_dir)
continue;
- ibmasmfs_create_file(sb, remote_dir, "width", &remote_settings_fops, (void *)display_width(sp), S_IRUSR|S_IWUSR);
- ibmasmfs_create_file(sb, remote_dir, "height", &remote_settings_fops, (void *)display_height(sp), S_IRUSR|S_IWUSR);
- ibmasmfs_create_file(sb, remote_dir, "depth", &remote_settings_fops, (void *)display_depth(sp), S_IRUSR|S_IWUSR);
+ ibmasmfs_create_file(remote_dir, "width", &remote_settings_fops, (void *)display_width(sp), S_IRUSR|S_IWUSR);
+ ibmasmfs_create_file(remote_dir, "height", &remote_settings_fops, (void *)display_height(sp), S_IRUSR|S_IWUSR);
+ ibmasmfs_create_file(remote_dir, "depth", &remote_settings_fops, (void *)display_depth(sp), S_IRUSR|S_IWUSR);
}
}
extern unsigned long oprofile_started;
extern unsigned long oprofile_backtrace_depth;
-struct super_block;
struct dentry;
-void oprofile_create_files(struct super_block *sb, struct dentry *root);
+void oprofile_create_files(struct dentry *root);
int oprofile_timer_init(struct oprofile_operations *ops);
#ifdef CONFIG_OPROFILE_NMI_TIMER
int op_nmi_timer_init(struct oprofile_operations *ops);
.llseek = noop_llseek,
};
-void oprofile_create_files(struct super_block *sb, struct dentry *root)
+void oprofile_create_files(struct dentry *root)
{
/* reinitialize default values */
oprofile_buffer_size = BUFFER_SIZE_DEFAULT;
oprofile_buffer_watershed = BUFFER_WATERSHED_DEFAULT;
oprofile_time_slice = msecs_to_jiffies(TIME_SLICE_DEFAULT);
- oprofilefs_create_file(sb, root, "enable", &enable_fops);
- oprofilefs_create_file_perm(sb, root, "dump", &dump_fops, 0666);
- oprofilefs_create_file(sb, root, "buffer", &event_buffer_fops);
- oprofilefs_create_ulong(sb, root, "buffer_size", &oprofile_buffer_size);
- oprofilefs_create_ulong(sb, root, "buffer_watershed", &oprofile_buffer_watershed);
- oprofilefs_create_ulong(sb, root, "cpu_buffer_size", &oprofile_cpu_buffer_size);
- oprofilefs_create_file(sb, root, "cpu_type", &cpu_type_fops);
- oprofilefs_create_file(sb, root, "backtrace_depth", &depth_fops);
- oprofilefs_create_file(sb, root, "pointer_size", &pointer_size_fops);
+ oprofilefs_create_file(root, "enable", &enable_fops);
+ oprofilefs_create_file_perm(root, "dump", &dump_fops, 0666);
+ oprofilefs_create_file(root, "buffer", &event_buffer_fops);
+ oprofilefs_create_ulong(root, "buffer_size", &oprofile_buffer_size);
+ oprofilefs_create_ulong(root, "buffer_watershed", &oprofile_buffer_watershed);
+ oprofilefs_create_ulong(root, "cpu_buffer_size", &oprofile_cpu_buffer_size);
+ oprofilefs_create_file(root, "cpu_type", &cpu_type_fops);
+ oprofilefs_create_file(root, "backtrace_depth", &depth_fops);
+ oprofilefs_create_file(root, "pointer_size", &pointer_size_fops);
#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
- oprofilefs_create_file(sb, root, "time_slice", &timeout_fops);
+ oprofilefs_create_file(root, "time_slice", &timeout_fops);
#endif
- oprofile_create_stats_files(sb, root);
+ oprofile_create_stats_files(root);
if (oprofile_ops.create_files)
- oprofile_ops.create_files(sb, root);
+ oprofile_ops.create_files(root);
}
op_destroy_counter(cpu, event);
}
-static int oprofile_perf_create_files(struct super_block *sb, struct dentry *root)
+static int oprofile_perf_create_files(struct dentry *root)
{
unsigned int i;
char buf[4];
snprintf(buf, sizeof buf, "%d", i);
- dir = oprofilefs_mkdir(sb, root, buf);
- oprofilefs_create_ulong(sb, dir, "enabled", &counter_config[i].enabled);
- oprofilefs_create_ulong(sb, dir, "event", &counter_config[i].event);
- oprofilefs_create_ulong(sb, dir, "count", &counter_config[i].count);
- oprofilefs_create_ulong(sb, dir, "unit_mask", &counter_config[i].unit_mask);
- oprofilefs_create_ulong(sb, dir, "kernel", &counter_config[i].kernel);
- oprofilefs_create_ulong(sb, dir, "user", &counter_config[i].user);
+ dir = oprofilefs_mkdir(root, buf);
+ oprofilefs_create_ulong(dir, "enabled", &counter_config[i].enabled);
+ oprofilefs_create_ulong(dir, "event", &counter_config[i].event);
+ oprofilefs_create_ulong(dir, "count", &counter_config[i].count);
+ oprofilefs_create_ulong(dir, "unit_mask", &counter_config[i].unit_mask);
+ oprofilefs_create_ulong(dir, "kernel", &counter_config[i].kernel);
+ oprofilefs_create_ulong(dir, "user", &counter_config[i].user);
}
return 0;
}
-void oprofile_create_stats_files(struct super_block *sb, struct dentry *root)
+void oprofile_create_stats_files(struct dentry *root)
{
struct oprofile_cpu_buffer *cpu_buf;
struct dentry *cpudir;
char buf[10];
int i;
- dir = oprofilefs_mkdir(sb, root, "stats");
+ dir = oprofilefs_mkdir(root, "stats");
if (!dir)
return;
for_each_possible_cpu(i) {
cpu_buf = &per_cpu(op_cpu_buffer, i);
snprintf(buf, 10, "cpu%d", i);
- cpudir = oprofilefs_mkdir(sb, dir, buf);
+ cpudir = oprofilefs_mkdir(dir, buf);
/* Strictly speaking access to these ulongs is racy,
* but we can't simply lock them, and they are
* informational only.
*/
- oprofilefs_create_ro_ulong(sb, cpudir, "sample_received",
+ oprofilefs_create_ro_ulong(cpudir, "sample_received",
&cpu_buf->sample_received);
- oprofilefs_create_ro_ulong(sb, cpudir, "sample_lost_overflow",
+ oprofilefs_create_ro_ulong(cpudir, "sample_lost_overflow",
&cpu_buf->sample_lost_overflow);
- oprofilefs_create_ro_ulong(sb, cpudir, "backtrace_aborted",
+ oprofilefs_create_ro_ulong(cpudir, "backtrace_aborted",
&cpu_buf->backtrace_aborted);
- oprofilefs_create_ro_ulong(sb, cpudir, "sample_invalid_eip",
+ oprofilefs_create_ro_ulong(cpudir, "sample_invalid_eip",
&cpu_buf->sample_invalid_eip);
}
- oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mm",
+ oprofilefs_create_ro_atomic(dir, "sample_lost_no_mm",
&oprofile_stats.sample_lost_no_mm);
- oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mapping",
+ oprofilefs_create_ro_atomic(dir, "sample_lost_no_mapping",
&oprofile_stats.sample_lost_no_mapping);
- oprofilefs_create_ro_atomic(sb, dir, "event_lost_overflow",
+ oprofilefs_create_ro_atomic(dir, "event_lost_overflow",
&oprofile_stats.event_lost_overflow);
- oprofilefs_create_ro_atomic(sb, dir, "bt_lost_no_mapping",
+ oprofilefs_create_ro_atomic(dir, "bt_lost_no_mapping",
&oprofile_stats.bt_lost_no_mapping);
#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
- oprofilefs_create_ro_atomic(sb, dir, "multiplex_counter",
+ oprofilefs_create_ro_atomic(dir, "multiplex_counter",
&oprofile_stats.multiplex_counter);
#endif
}
/* reset all stats to zero */
void oprofile_reset_stats(void);
-struct super_block;
struct dentry;
/* create the stats/ dir */
-void oprofile_create_stats_files(struct super_block *sb, struct dentry *root);
+void oprofile_create_stats_files(struct dentry *root);
#endif /* OPROFILE_STATS_H */
};
-static int __oprofilefs_create_file(struct super_block *sb,
- struct dentry *root, char const *name, const struct file_operations *fops,
- int perm, void *priv)
+static int __oprofilefs_create_file(struct dentry *root, char const *name,
+ const struct file_operations *fops, int perm, void *priv)
{
struct dentry *dentry;
struct inode *inode;
mutex_unlock(&root->d_inode->i_mutex);
return -ENOMEM;
}
- inode = oprofilefs_get_inode(sb, S_IFREG | perm);
+ inode = oprofilefs_get_inode(root->d_sb, S_IFREG | perm);
if (!inode) {
dput(dentry);
mutex_unlock(&root->d_inode->i_mutex);
}
-int oprofilefs_create_ulong(struct super_block *sb, struct dentry *root,
+int oprofilefs_create_ulong(struct dentry *root,
char const *name, unsigned long *val)
{
- return __oprofilefs_create_file(sb, root, name,
+ return __oprofilefs_create_file(root, name,
&ulong_fops, 0644, val);
}
-int oprofilefs_create_ro_ulong(struct super_block *sb, struct dentry *root,
+int oprofilefs_create_ro_ulong(struct dentry *root,
char const *name, unsigned long *val)
{
- return __oprofilefs_create_file(sb, root, name,
+ return __oprofilefs_create_file(root, name,
&ulong_ro_fops, 0444, val);
}
};
-int oprofilefs_create_ro_atomic(struct super_block *sb, struct dentry *root,
+int oprofilefs_create_ro_atomic(struct dentry *root,
char const *name, atomic_t *val)
{
- return __oprofilefs_create_file(sb, root, name,
+ return __oprofilefs_create_file(root, name,
&atomic_ro_fops, 0444, val);
}
-int oprofilefs_create_file(struct super_block *sb, struct dentry *root,
+int oprofilefs_create_file(struct dentry *root,
char const *name, const struct file_operations *fops)
{
- return __oprofilefs_create_file(sb, root, name, fops, 0644, NULL);
+ return __oprofilefs_create_file(root, name, fops, 0644, NULL);
}
-int oprofilefs_create_file_perm(struct super_block *sb, struct dentry *root,
+int oprofilefs_create_file_perm(struct dentry *root,
char const *name, const struct file_operations *fops, int perm)
{
- return __oprofilefs_create_file(sb, root, name, fops, perm, NULL);
+ return __oprofilefs_create_file(root, name, fops, perm, NULL);
}
-struct dentry *oprofilefs_mkdir(struct super_block *sb,
- struct dentry *root, char const *name)
+struct dentry *oprofilefs_mkdir(struct dentry *parent, char const *name)
{
struct dentry *dentry;
struct inode *inode;
- mutex_lock(&root->d_inode->i_mutex);
- dentry = d_alloc_name(root, name);
+ mutex_lock(&parent->d_inode->i_mutex);
+ dentry = d_alloc_name(parent, name);
if (!dentry) {
- mutex_unlock(&root->d_inode->i_mutex);
+ mutex_unlock(&parent->d_inode->i_mutex);
return NULL;
}
- inode = oprofilefs_get_inode(sb, S_IFDIR | 0755);
+ inode = oprofilefs_get_inode(parent->d_sb, S_IFDIR | 0755);
if (!inode) {
dput(dentry);
- mutex_unlock(&root->d_inode->i_mutex);
+ mutex_unlock(&parent->d_inode->i_mutex);
return NULL;
}
inode->i_op = &simple_dir_inode_operations;
inode->i_fop = &simple_dir_operations;
d_add(dentry, inode);
- mutex_unlock(&root->d_inode->i_mutex);
+ mutex_unlock(&parent->d_inode->i_mutex);
return dentry;
}
if (!sb->s_root)
return -ENOMEM;
- oprofile_create_files(sb, sb->s_root);
+ oprofile_create_files(sb->s_root);
// FIXME: verify kill_litter_super removes our dentries
return 0;
blk_start_plug(&plug);
ret = __generic_file_aio_write(iocb, iov, nr_segs, &iocb->ki_pos);
- if (ret > 0 || ret == -EIOCBQUEUED) {
+ if (ret > 0) {
ssize_t err;
err = generic_write_sync(file, pos, ret);
*/
BTRFS_I(inode)->last_trans = root->fs_info->generation + 1;
BTRFS_I(inode)->last_sub_trans = root->log_transid;
- if (num_written > 0 || num_written == -EIOCBQUEUED) {
+ if (num_written > 0) {
err = generic_write_sync(file, pos, num_written);
if (err < 0 && num_written > 0)
num_written = err;
mutex_unlock(&inode->i_mutex);
}
- if (rc > 0 || rc == -EIOCBQUEUED) {
+ if (rc > 0) {
ssize_t err;
err = generic_write_sync(file, pos, rc);
* inform the fs via d_prune that this dentry is about to be
* unhashed and destroyed.
*/
- if (dentry->d_flags & DCACHE_OP_PRUNE)
+ if ((dentry->d_flags & DCACHE_OP_PRUNE) && !d_unhashed(dentry))
dentry->d_op->d_prune(dentry);
dentry_lru_del(dentry);
hlist_for_each_entry(dentry, &inode->i_dentry, d_alias) {
spin_lock(&dentry->d_lock);
if (!dentry->d_lockref.count) {
+ /*
+ * inform the fs via d_prune that this dentry
+ * is about to be unhashed and destroyed.
+ */
+ if ((dentry->d_flags & DCACHE_OP_PRUNE) &&
+ !d_unhashed(dentry))
+ dentry->d_op->d_prune(dentry);
+
__dget_dlock(dentry);
__d_drop(dentry);
spin_unlock(&dentry->d_lock);
* inform the fs that this dentry is about to be
* unhashed and destroyed.
*/
- if (dentry->d_flags & DCACHE_OP_PRUNE)
+ if ((dentry->d_flags & DCACHE_OP_PRUNE) &&
+ !d_unhashed(dentry))
dentry->d_op->d_prune(dentry);
dentry_lru_del(dentry);
spinlock_t bio_lock; /* protects BIO fields below */
int page_errors; /* errno from get_user_pages() */
int is_async; /* is IO async ? */
+ bool defer_completion; /* defer AIO completion to workqueue? */
int io_error; /* IO error in completion path */
unsigned long refcount; /* direct_io_worker() and bios */
struct bio *bio_list; /* singly linked via bi_private */
* allocation time. Don't add new fields after pages[] unless you
* wish that they not be zeroed.
*/
- struct page *pages[DIO_PAGES]; /* page buffer */
+ union {
+ struct page *pages[DIO_PAGES]; /* page buffer */
+ struct work_struct complete_work;/* deferred AIO completion */
+ };
} ____cacheline_aligned_in_smp;
static struct kmem_cache *dio_cache __read_mostly;
* dio_complete() - called when all DIO BIO I/O has been completed
* @offset: the byte offset in the file of the completed operation
*
- * This releases locks as dictated by the locking type, lets interested parties
- * know that a DIO operation has completed, and calculates the resulting return
- * code for the operation.
+ * This drops i_dio_count, lets interested parties know that a DIO operation
+ * has completed, and calculates the resulting return code for the operation.
*
* It lets the filesystem know if it registered an interest earlier via
* get_block. Pass the private field of the map buffer_head so that
* filesystems can use it to hold additional state between get_block calls and
* dio_complete.
*/
-static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret, bool is_async)
+static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret,
+ bool is_async)
{
ssize_t transferred = 0;
if (ret == 0)
ret = transferred;
- if (dio->end_io && dio->result) {
- dio->end_io(dio->iocb, offset, transferred,
- dio->private, ret, is_async);
- } else {
- inode_dio_done(dio->inode);
- if (is_async)
- aio_complete(dio->iocb, ret, 0);
+ if (dio->end_io && dio->result)
+ dio->end_io(dio->iocb, offset, transferred, dio->private);
+
+ inode_dio_done(dio->inode);
+ if (is_async) {
+ if (dio->rw & WRITE) {
+ int err;
+
+ err = generic_write_sync(dio->iocb->ki_filp, offset,
+ transferred);
+ if (err < 0 && ret > 0)
+ ret = err;
+ }
+
+ aio_complete(dio->iocb, ret, 0);
}
+ kmem_cache_free(dio_cache, dio);
return ret;
}
+static void dio_aio_complete_work(struct work_struct *work)
+{
+ struct dio *dio = container_of(work, struct dio, complete_work);
+
+ dio_complete(dio, dio->iocb->ki_pos, 0, true);
+}
+
static int dio_bio_complete(struct dio *dio, struct bio *bio);
+
/*
* Asynchronous IO callback.
*/
spin_unlock_irqrestore(&dio->bio_lock, flags);
if (remaining == 0) {
- dio_complete(dio, dio->iocb->ki_pos, 0, true);
- kmem_cache_free(dio_cache, dio);
+ if (dio->result && dio->defer_completion) {
+ INIT_WORK(&dio->complete_work, dio_aio_complete_work);
+ queue_work(dio->inode->i_sb->s_dio_done_wq,
+ &dio->complete_work);
+ } else {
+ dio_complete(dio, dio->iocb->ki_pos, 0, true);
+ }
}
}
return ret;
}
+/*
+ * Create workqueue for deferred direct IO completions. We allocate the
+ * workqueue when it's first needed. This avoids creating workqueue for
+ * filesystems that don't need it and also allows us to create the workqueue
+ * late enough so the we can include s_id in the name of the workqueue.
+ */
+static int sb_init_dio_done_wq(struct super_block *sb)
+{
+ struct workqueue_struct *wq = alloc_workqueue("dio/%s",
+ WQ_MEM_RECLAIM, 0,
+ sb->s_id);
+ if (!wq)
+ return -ENOMEM;
+ /*
+ * This has to be atomic as more DIOs can race to create the workqueue
+ */
+ cmpxchg(&sb->s_dio_done_wq, NULL, wq);
+ /* Someone created workqueue before us? Free ours... */
+ if (wq != sb->s_dio_done_wq)
+ destroy_workqueue(wq);
+ return 0;
+}
+
+static int dio_set_defer_completion(struct dio *dio)
+{
+ struct super_block *sb = dio->inode->i_sb;
+
+ if (dio->defer_completion)
+ return 0;
+ dio->defer_completion = true;
+ if (!sb->s_dio_done_wq)
+ return sb_init_dio_done_wq(sb);
+ return 0;
+}
+
/*
* Call into the fs to map some more disk blocks. We record the current number
* of available blocks at sdio->blocks_available. These are in units of the
/* Store for completion */
dio->private = map_bh->b_private;
+
+ if (ret == 0 && buffer_defer_completion(map_bh))
+ ret = dio_set_defer_completion(dio);
}
return ret;
}
}
}
- /*
- * Will be decremented at I/O completion time.
- */
- atomic_inc(&inode->i_dio_count);
-
/*
* For file extending writes updating i_size before data
* writeouts complete can expose uninitialized blocks. So
*/
dio->is_async = !is_sync_kiocb(iocb) && !((rw & WRITE) &&
(end > i_size_read(inode)));
-
- retval = 0;
-
dio->inode = inode;
dio->rw = rw;
+
+ /*
+ * For AIO O_(D)SYNC writes we need to defer completions to a workqueue
+ * so that we can call ->fsync.
+ */
+ if (dio->is_async && (rw & WRITE) &&
+ ((iocb->ki_filp->f_flags & O_DSYNC) ||
+ IS_SYNC(iocb->ki_filp->f_mapping->host))) {
+ retval = dio_set_defer_completion(dio);
+ if (retval) {
+ /*
+ * We grab i_mutex only for reads so we don't have
+ * to release it here
+ */
+ kmem_cache_free(dio_cache, dio);
+ goto out;
+ }
+ }
+
+ /*
+ * Will be decremented at I/O completion time.
+ */
+ atomic_inc(&inode->i_dio_count);
+
+ retval = 0;
sdio.blkbits = blkbits;
sdio.blkfactor = i_blkbits - blkbits;
sdio.block_in_file = offset >> blkbits;
if (drop_refcount(dio) == 0) {
retval = dio_complete(dio, offset, retval, false);
- kmem_cache_free(dio_cache, dio);
} else
BUG_ON(retval != -EIOCBQUEUED);
{
int error;
int did_lock_epmutex = 0;
- struct file *file, *tfile;
+ struct fd f, tf;
struct eventpoll *ep;
struct epitem *epi;
struct epoll_event epds;
copy_from_user(&epds, event, sizeof(struct epoll_event)))
goto error_return;
- /* Get the "struct file *" for the eventpoll file */
error = -EBADF;
- file = fget(epfd);
- if (!file)
+ f = fdget(epfd);
+ if (!f.file)
goto error_return;
/* Get the "struct file *" for the target file */
- tfile = fget(fd);
- if (!tfile)
+ tf = fdget(fd);
+ if (!tf.file)
goto error_fput;
/* The target file descriptor must support poll */
error = -EPERM;
- if (!tfile->f_op || !tfile->f_op->poll)
+ if (!tf.file->f_op || !tf.file->f_op->poll)
goto error_tgt_fput;
/* Check if EPOLLWAKEUP is allowed */
* adding an epoll file descriptor inside itself.
*/
error = -EINVAL;
- if (file == tfile || !is_file_epoll(file))
+ if (f.file == tf.file || !is_file_epoll(f.file))
goto error_tgt_fput;
/*
* At this point it is safe to assume that the "private_data" contains
* our own data structure.
*/
- ep = file->private_data;
+ ep = f.file->private_data;
/*
* When we insert an epoll file descriptor, inside another epoll file
did_lock_epmutex = 1;
}
if (op == EPOLL_CTL_ADD) {
- if (is_file_epoll(tfile)) {
+ if (is_file_epoll(tf.file)) {
error = -ELOOP;
- if (ep_loop_check(ep, tfile) != 0) {
+ if (ep_loop_check(ep, tf.file) != 0) {
clear_tfile_check_list();
goto error_tgt_fput;
}
} else
- list_add(&tfile->f_tfile_llink, &tfile_check_list);
+ list_add(&tf.file->f_tfile_llink, &tfile_check_list);
}
mutex_lock_nested(&ep->mtx, 0);
* above, we can be sure to be able to use the item looked up by
* ep_find() till we release the mutex.
*/
- epi = ep_find(ep, tfile, fd);
+ epi = ep_find(ep, tf.file, fd);
error = -EINVAL;
switch (op) {
case EPOLL_CTL_ADD:
if (!epi) {
epds.events |= POLLERR | POLLHUP;
- error = ep_insert(ep, &epds, tfile, fd);
+ error = ep_insert(ep, &epds, tf.file, fd);
} else
error = -EEXIST;
clear_tfile_check_list();
if (did_lock_epmutex)
mutex_unlock(&epmutex);
- fput(tfile);
+ fdput(tf);
error_fput:
- fput(file);
+ fdput(f);
error_return:
return error;
* Flags for ext4_io_end->flags
*/
#define EXT4_IO_END_UNWRITTEN 0x0001
-#define EXT4_IO_END_DIRECT 0x0002
/*
* For converting uninitialized extents on a work queue. 'handle' is used for
unsigned int flag; /* unwritten or not */
loff_t offset; /* offset in the file */
ssize_t size; /* size of the extent */
- struct kiocb *iocb; /* iocb struct for AIO */
- int result; /* error value for AIO */
atomic_t count; /* reference counter */
} ext4_io_end_t;
* Completed IOs that need unwritten extents handling and don't have
* transaction reserved
*/
- struct list_head i_unrsv_conversion_list;
atomic_t i_ioend_count; /* Number of outstanding io_end structs */
atomic_t i_unwritten; /* Nr. of inflight conversions pending */
struct work_struct i_rsv_conversion_work;
- struct work_struct i_unrsv_conversion_work;
spinlock_t i_block_reservation_lock;
struct flex_groups *s_flex_groups;
ext4_group_t s_flex_groups_allocated;
- /* workqueue for unreserved extent convertions (dio) */
- struct workqueue_struct *unrsv_conversion_wq;
/* workqueue for reserved extent conversions (buffered io) */
struct workqueue_struct *rsv_conversion_wq;
struct ext4_io_end *io_end)
{
if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) {
- /* Writeback has to have coversion transaction reserved */
- WARN_ON(EXT4_SB(inode->i_sb)->s_journal && !io_end->handle &&
- !(io_end->flag & EXT4_IO_END_DIRECT));
io_end->flag |= EXT4_IO_END_UNWRITTEN;
atomic_inc(&EXT4_I(inode)->i_unwritten);
}
extern void ext4_io_submit_init(struct ext4_io_submit *io,
struct writeback_control *wbc);
extern void ext4_end_io_rsv_work(struct work_struct *work);
-extern void ext4_end_io_unrsv_work(struct work_struct *work);
extern void ext4_io_submit(struct ext4_io_submit *io);
extern int ext4_bio_write_page(struct ext4_io_submit *io,
struct page *page,
ret = __generic_file_aio_write(iocb, iov, nr_segs, &iocb->ki_pos);
mutex_unlock(&inode->i_mutex);
- if (ret > 0 || ret == -EIOCBQUEUED) {
+ if (ret > 0) {
ssize_t err;
err = generic_write_sync(file, pos, ret);
ret = ext4_map_blocks(handle, inode, &map, flags);
if (ret > 0) {
+ ext4_io_end_t *io_end = ext4_inode_aio(inode);
+
map_bh(bh, inode->i_sb, map.m_pblk);
bh->b_state = (bh->b_state & ~EXT4_MAP_FLAGS) | map.m_flags;
+ if (io_end && io_end->flag & EXT4_IO_END_UNWRITTEN)
+ set_buffer_defer_completion(bh);
bh->b_size = inode->i_sb->s_blocksize * map.m_len;
ret = 0;
}
}
static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
- ssize_t size, void *private, int ret,
- bool is_async)
+ ssize_t size, void *private)
{
- struct inode *inode = file_inode(iocb->ki_filp);
ext4_io_end_t *io_end = iocb->private;
/* if not async direct IO just return */
- if (!io_end) {
- inode_dio_done(inode);
- if (is_async)
- aio_complete(iocb, ret, 0);
+ if (!io_end)
return;
- }
ext_debug("ext4_end_io_dio(): io_end 0x%p "
"for inode %lu, iocb 0x%p, offset %llu, size %zd\n",
iocb->private = NULL;
io_end->offset = offset;
io_end->size = size;
- if (is_async) {
- io_end->iocb = iocb;
- io_end->result = ret;
- }
- ext4_put_io_end_defer(io_end);
+ ext4_put_io_end(io_end);
}
/*
ret = -ENOMEM;
goto retake_lock;
}
- io_end->flag |= EXT4_IO_END_DIRECT;
/*
* Grab reference for DIO. Will be dropped in ext4_end_io_dio()
*/
if (ret <= 0 && ret != -EIOCBQUEUED && iocb->private) {
WARN_ON(iocb->private != io_end);
WARN_ON(io_end->flag & EXT4_IO_END_UNWRITTEN);
- WARN_ON(io_end->iocb);
- /*
- * Generic code already did inode_dio_done() so we
- * have to clear EXT4_IO_END_DIRECT to not do it for
- * the second time.
- */
- io_end->flag = 0;
ext4_put_io_end(io_end);
iocb->private = NULL;
}
ext4_finish_bio(bio);
bio_put(bio);
}
- if (io_end->flag & EXT4_IO_END_DIRECT)
- inode_dio_done(io_end->inode);
- if (io_end->iocb)
- aio_complete(io_end->iocb, io_end->result, 0);
kmem_cache_free(io_end_cachep, io_end);
}
struct workqueue_struct *wq;
unsigned long flags;
- BUG_ON(!(io_end->flag & EXT4_IO_END_UNWRITTEN));
+ /* Only reserved conversions from writeback should enter here */
+ WARN_ON(!(io_end->flag & EXT4_IO_END_UNWRITTEN));
+ WARN_ON(!io_end->handle);
spin_lock_irqsave(&ei->i_completed_io_lock, flags);
- if (io_end->handle) {
- wq = EXT4_SB(io_end->inode->i_sb)->rsv_conversion_wq;
- if (list_empty(&ei->i_rsv_conversion_list))
- queue_work(wq, &ei->i_rsv_conversion_work);
- list_add_tail(&io_end->list, &ei->i_rsv_conversion_list);
- } else {
- wq = EXT4_SB(io_end->inode->i_sb)->unrsv_conversion_wq;
- if (list_empty(&ei->i_unrsv_conversion_list))
- queue_work(wq, &ei->i_unrsv_conversion_work);
- list_add_tail(&io_end->list, &ei->i_unrsv_conversion_list);
- }
+ wq = EXT4_SB(io_end->inode->i_sb)->rsv_conversion_wq;
+ if (list_empty(&ei->i_rsv_conversion_list))
+ queue_work(wq, &ei->i_rsv_conversion_work);
+ list_add_tail(&io_end->list, &ei->i_rsv_conversion_list);
spin_unlock_irqrestore(&ei->i_completed_io_lock, flags);
}
ext4_do_flush_completed_IO(&ei->vfs_inode, &ei->i_rsv_conversion_list);
}
-void ext4_end_io_unrsv_work(struct work_struct *work)
-{
- struct ext4_inode_info *ei = container_of(work, struct ext4_inode_info,
- i_unrsv_conversion_work);
- ext4_do_flush_completed_IO(&ei->vfs_inode, &ei->i_unrsv_conversion_list);
-}
-
ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags)
{
ext4_io_end_t *io = kmem_cache_zalloc(io_end_cachep, flags);
ext4_unregister_li_request(sb);
dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
- flush_workqueue(sbi->unrsv_conversion_wq);
flush_workqueue(sbi->rsv_conversion_wq);
- destroy_workqueue(sbi->unrsv_conversion_wq);
destroy_workqueue(sbi->rsv_conversion_wq);
if (sbi->s_journal) {
#endif
ei->jinode = NULL;
INIT_LIST_HEAD(&ei->i_rsv_conversion_list);
- INIT_LIST_HEAD(&ei->i_unrsv_conversion_list);
spin_lock_init(&ei->i_completed_io_lock);
ei->i_sync_tid = 0;
ei->i_datasync_tid = 0;
atomic_set(&ei->i_ioend_count, 0);
atomic_set(&ei->i_unwritten, 0);
INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work);
- INIT_WORK(&ei->i_unrsv_conversion_work, ext4_end_io_unrsv_work);
return &ei->vfs_inode;
}
goto failed_mount4;
}
- EXT4_SB(sb)->unrsv_conversion_wq =
- alloc_workqueue("ext4-unrsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
- if (!EXT4_SB(sb)->unrsv_conversion_wq) {
- printk(KERN_ERR "EXT4-fs: failed to create workqueue\n");
- ret = -ENOMEM;
- goto failed_mount4;
- }
-
/*
* The jbd2_journal_load will have done any necessary log recovery,
* so we can safely mount the rest of the filesystem now.
ext4_msg(sb, KERN_ERR, "mount failed");
if (EXT4_SB(sb)->rsv_conversion_wq)
destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq);
- if (EXT4_SB(sb)->unrsv_conversion_wq)
- destroy_workqueue(EXT4_SB(sb)->unrsv_conversion_wq);
failed_mount_wq:
if (sbi->s_journal) {
jbd2_journal_destroy(sbi->s_journal);
trace_ext4_sync_fs(sb, wait);
flush_workqueue(sbi->rsv_conversion_wq);
- flush_workqueue(sbi->unrsv_conversion_wq);
/*
* Writeback quota in non-journalled quota case - journalled quota has
* no dirty dquots
trace_ext4_sync_fs(sb, wait);
flush_workqueue(EXT4_SB(sb)->rsv_conversion_wq);
- flush_workqueue(EXT4_SB(sb)->unrsv_conversion_wq);
dquot_writeback_dquots(sb, -1);
if (wait && test_opt(sb, BARRIER))
ret = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL);
*/
void file_sb_list_add(struct file *file, struct super_block *sb)
{
+ if (likely(!(file->f_mode & FMODE_WRITE)))
+ return;
+ if (!S_ISREG(file_inode(file)->i_mode))
+ return;
lg_local_lock(&files_lglock);
__file_sb_list_add(file, sb);
lg_local_unlock(&files_lglock);
lg_global_lock(&files_lglock);
do_file_list_for_each_entry(sb, f) {
- if (!S_ISREG(file_inode(f)->i_mode))
- continue;
if (!file_count(f))
continue;
if (!(f->f_mode & FMODE_WRITE))
* This function automatically handles read only file systems and media,
* as well as the "noatime" flag and inode specific "noatime" markers.
*/
-void touch_atime(struct path *path)
+void touch_atime(const struct path *path)
{
struct vfsmount *mnt = path->mnt;
struct inode *inode = path->dentry->d_inode;
return s;
}
+/**
+ * umount_lookup_last - look up last component for umount
+ * @nd: pathwalk nameidata - currently pointing at parent directory of "last"
+ * @path: pointer to container for result
+ *
+ * This is a special lookup_last function just for umount. In this case, we
+ * need to resolve the path without doing any revalidation.
+ *
+ * The nameidata should be the result of doing a LOOKUP_PARENT pathwalk. Since
+ * mountpoints are always pinned in the dcache, their ancestors are too. Thus,
+ * in almost all cases, this lookup will be served out of the dcache. The only
+ * cases where it won't are if nd->last refers to a symlink or the path is
+ * bogus and it doesn't exist.
+ *
+ * Returns:
+ * -error: if there was an error during lookup. This includes -ENOENT if the
+ * lookup found a negative dentry. The nd->path reference will also be
+ * put in this case.
+ *
+ * 0: if we successfully resolved nd->path and found it to not to be a
+ * symlink that needs to be followed. "path" will also be populated.
+ * The nd->path reference will also be put.
+ *
+ * 1: if we successfully resolved nd->last and found it to be a symlink
+ * that needs to be followed. "path" will be populated with the path
+ * to the link, and nd->path will *not* be put.
+ */
+static int
+umount_lookup_last(struct nameidata *nd, struct path *path)
+{
+ int error = 0;
+ struct dentry *dentry;
+ struct dentry *dir = nd->path.dentry;
+
+ if (unlikely(nd->flags & LOOKUP_RCU)) {
+ WARN_ON_ONCE(1);
+ error = -ECHILD;
+ goto error_check;
+ }
+
+ nd->flags &= ~LOOKUP_PARENT;
+
+ if (unlikely(nd->last_type != LAST_NORM)) {
+ error = handle_dots(nd, nd->last_type);
+ if (!error)
+ dentry = dget(nd->path.dentry);
+ goto error_check;
+ }
+
+ mutex_lock(&dir->d_inode->i_mutex);
+ dentry = d_lookup(dir, &nd->last);
+ if (!dentry) {
+ /*
+ * No cached dentry. Mounted dentries are pinned in the cache,
+ * so that means that this dentry is probably a symlink or the
+ * path doesn't actually point to a mounted dentry.
+ */
+ dentry = d_alloc(dir, &nd->last);
+ if (!dentry) {
+ error = -ENOMEM;
+ } else {
+ dentry = lookup_real(dir->d_inode, dentry, nd->flags);
+ if (IS_ERR(dentry))
+ error = PTR_ERR(dentry);
+ }
+ }
+ mutex_unlock(&dir->d_inode->i_mutex);
+
+error_check:
+ if (!error) {
+ if (!dentry->d_inode) {
+ error = -ENOENT;
+ dput(dentry);
+ } else {
+ path->dentry = dentry;
+ path->mnt = mntget(nd->path.mnt);
+ if (should_follow_link(dentry->d_inode,
+ nd->flags & LOOKUP_FOLLOW))
+ return 1;
+ follow_mount(path);
+ }
+ }
+ terminate_walk(nd);
+ return error;
+}
+
+/**
+ * path_umountat - look up a path to be umounted
+ * @dfd: directory file descriptor to start walk from
+ * @name: full pathname to walk
+ * @flags: lookup flags
+ * @nd: pathwalk nameidata
+ *
+ * Look up the given name, but don't attempt to revalidate the last component.
+ * Returns 0 and "path" will be valid on success; Retuns error otherwise.
+ */
+static int
+path_umountat(int dfd, const char *name, struct path *path, unsigned int flags)
+{
+ struct file *base = NULL;
+ struct nameidata nd;
+ int err;
+
+ err = path_init(dfd, name, flags | LOOKUP_PARENT, &nd, &base);
+ if (unlikely(err))
+ return err;
+
+ current->total_link_count = 0;
+ err = link_path_walk(name, &nd);
+ if (err)
+ goto out;
+
+ /* If we're in rcuwalk, drop out of it to handle last component */
+ if (nd.flags & LOOKUP_RCU) {
+ err = unlazy_walk(&nd, NULL);
+ if (err) {
+ terminate_walk(&nd);
+ goto out;
+ }
+ }
+
+ err = umount_lookup_last(&nd, path);
+ while (err > 0) {
+ void *cookie;
+ struct path link = *path;
+ err = may_follow_link(&link, &nd);
+ if (unlikely(err))
+ break;
+ nd.flags |= LOOKUP_PARENT;
+ err = follow_link(&link, &nd, &cookie);
+ if (err)
+ break;
+ err = umount_lookup_last(&nd, path);
+ put_link(&nd, &link, cookie);
+ }
+out:
+ if (base)
+ fput(base);
+
+ if (nd.root.mnt && !(nd.flags & LOOKUP_ROOT))
+ path_put(&nd.root);
+
+ return err;
+}
+
+/**
+ * user_path_umountat - lookup a path from userland in order to umount it
+ * @dfd: directory file descriptor
+ * @name: pathname from userland
+ * @flags: lookup flags
+ * @path: pointer to container to hold result
+ *
+ * A umount is a special case for path walking. We're not actually interested
+ * in the inode in this situation, and ESTALE errors can be a problem. We
+ * simply want track down the dentry and vfsmount attached at the mountpoint
+ * and avoid revalidating the last component.
+ *
+ * Returns 0 and populates "path" on success.
+ */
+int
+user_path_umountat(int dfd, const char __user *name, unsigned int flags,
+ struct path *path)
+{
+ struct filename *s = getname(name);
+ int error;
+
+ if (IS_ERR(s))
+ return PTR_ERR(s);
+
+ error = path_umountat(dfd, s->name, path, flags | LOOKUP_RCU);
+ if (unlikely(error == -ECHILD))
+ error = path_umountat(dfd, s->name, path, flags);
+ if (unlikely(error == -ESTALE))
+ error = path_umountat(dfd, s->name, path, flags | LOOKUP_REVAL);
+
+ if (likely(!error))
+ audit_inode(s, path->dentry, 0);
+
+ putname(s);
+ return error;
+}
+
/*
* It's inline, so penalty for filesystems that don't use sticky bit is
* minimal.
if (!(flags & UMOUNT_NOFOLLOW))
lookup_flags |= LOOKUP_FOLLOW;
- retval = user_path_at(AT_FDCWD, name, lookup_flags, &path);
+ retval = user_path_umountat(AT_FDCWD, name, lookup_flags, &path);
if (retval)
goto out;
mnt = real_mount(path.mnt);
static __be32 nfsd4_encode_path(const struct path *root,
const struct path *path, __be32 **pp, int *buflen)
{
- struct path cur = {
- .mnt = path->mnt,
- .dentry = path->dentry,
- };
+ struct path cur = *path;
__be32 *p = *pp;
struct dentry **components = NULL;
unsigned int ncomponents = 0;
while (ncomponents) {
struct dentry *dentry = components[ncomponents - 1];
- unsigned int len = dentry->d_name.len;
+ unsigned int len;
+ spin_lock(&dentry->d_lock);
+ len = dentry->d_name.len;
*buflen -= 4 + (XDR_QUADLEN(len) << 2);
- if (*buflen < 0)
+ if (*buflen < 0) {
+ spin_unlock(&dentry->d_lock);
goto out_free;
+ }
WRITE32(len);
WRITEMEM(dentry->d_name.name, len);
dprintk("/%s", dentry->d_name.name);
+ spin_unlock(&dentry->d_lock);
dput(dentry);
ncomponents--;
}
return ret;
}
-static int nilfs_tree_was_touched(struct dentry *root_dentry)
-{
- return d_count(root_dentry) > 1;
-}
-
/**
- * nilfs_try_to_shrink_tree() - try to shrink dentries of a checkpoint
+ * nilfs_tree_is_busy() - try to shrink dentries of a checkpoint
* @root_dentry: root dentry of the tree to be shrunk
*
* This function returns true if the tree was in-use.
*/
-static int nilfs_try_to_shrink_tree(struct dentry *root_dentry)
+static bool nilfs_tree_is_busy(struct dentry *root_dentry)
{
- if (have_submounts(root_dentry))
- return true;
shrink_dcache_parent(root_dentry);
- return nilfs_tree_was_touched(root_dentry);
+ return d_count(root_dentry) > 1;
}
int nilfs_checkpoint_is_mounted(struct super_block *sb, __u64 cno)
if (inode) {
dentry = d_find_alias(inode);
if (dentry) {
- if (nilfs_tree_was_touched(dentry))
- ret = nilfs_try_to_shrink_tree(dentry);
+ ret = nilfs_tree_is_busy(dentry);
dput(dentry);
}
iput(inode);
s->s_flags |= MS_ACTIVE;
} else if (!sd.cno) {
- int busy = false;
-
- if (nilfs_tree_was_touched(s->s_root)) {
- busy = nilfs_try_to_shrink_tree(s->s_root);
- if (busy && (flags ^ s->s_flags) & MS_RDONLY) {
+ if (nilfs_tree_is_busy(s->s_root)) {
+ if ((flags ^ s->s_flags) & MS_RDONLY) {
printk(KERN_ERR "NILFS: the device already "
"has a %s mount.\n",
(s->s_flags & MS_RDONLY) ?
err = -EBUSY;
goto failed_super;
}
- }
- if (!busy) {
+ } else {
/*
* Try remount to setup mount states if the current
* tree is not mounted and only snapshots use this sb.
static void ocfs2_dio_end_io(struct kiocb *iocb,
loff_t offset,
ssize_t bytes,
- void *private,
- int ret,
- bool is_async)
+ void *private)
{
struct inode *inode = file_inode(iocb->ki_filp);
int level;
level = ocfs2_iocb_rw_locked_level(iocb);
ocfs2_rw_unlock(inode, level);
-
- inode_dio_done(inode);
- if (is_async)
- aio_complete(iocb, ret, 0);
}
/*
SYSCALL_DEFINE2(fchmod, unsigned int, fd, umode_t, mode)
{
- struct file * file;
+ struct fd f = fdget(fd);
int err = -EBADF;
- file = fget(fd);
- if (file) {
- audit_inode(NULL, file->f_path.dentry, 0);
- err = chmod_common(&file->f_path, mode);
- fput(file);
+ if (f.file) {
+ audit_inode(NULL, f.file->f_path.dentry, 0);
+ err = chmod_common(&f.file->f_path, mode);
+ fdput(f);
}
return err;
}
static const struct super_operations default_op;
if (s) {
- if (security_sb_alloc(s)) {
- /*
- * We cannot call security_sb_free() without
- * security_sb_alloc() succeeding. So bail out manually
- */
- kfree(s);
- s = NULL;
- goto out;
- }
+ if (security_sb_alloc(s))
+ goto out_free_sb;
+
#ifdef CONFIG_SMP
s->s_files = alloc_percpu(struct list_head);
if (!s->s_files)
free_percpu(s->s_files);
#endif
destroy_sb_writers(s);
+out_free_sb:
kfree(s);
s = NULL;
goto out;
evict_inodes(sb);
+ if (sb->s_dio_done_wq) {
+ destroy_workqueue(sb->s_dio_done_wq);
+ sb->s_dio_done_wq = NULL;
+ }
+
if (sop->put_super)
sop->put_super(sb);
bh->b_end_io(bh, !ioend->io_error);
}
- if (ioend->io_iocb) {
- inode_dio_done(ioend->io_inode);
- if (ioend->io_isasync) {
- aio_complete(ioend->io_iocb, ioend->io_error ?
- ioend->io_error : ioend->io_result, 0);
- }
- }
-
mempool_free(ioend, xfs_ioend_pool);
}
* all the I/O from calling the completion routine too early.
*/
atomic_set(&ioend->io_remaining, 1);
- ioend->io_isasync = 0;
ioend->io_isdirect = 0;
ioend->io_error = 0;
ioend->io_list = NULL;
ioend->io_buffer_tail = NULL;
ioend->io_offset = 0;
ioend->io_size = 0;
- ioend->io_iocb = NULL;
- ioend->io_result = 0;
ioend->io_append_trans = NULL;
INIT_WORK(&ioend->io_work, xfs_end_io);
if (create || !ISUNWRITTEN(&imap))
xfs_map_buffer(inode, bh_result, &imap, offset);
if (create && ISUNWRITTEN(&imap)) {
- if (direct)
+ if (direct) {
bh_result->b_private = inode;
+ set_buffer_defer_completion(bh_result);
+ }
set_buffer_unwritten(bh_result);
}
}
struct kiocb *iocb,
loff_t offset,
ssize_t size,
- void *private,
- int ret,
- bool is_async)
+ void *private)
{
struct xfs_ioend *ioend = iocb->private;
ioend->io_offset = offset;
ioend->io_size = size;
- ioend->io_iocb = iocb;
- ioend->io_result = ret;
if (private && size > 0)
ioend->io_type = XFS_IO_UNWRITTEN;
- if (is_async) {
- ioend->io_isasync = 1;
- xfs_finish_ioend(ioend);
- } else {
- xfs_finish_ioend_sync(ioend);
- }
+ xfs_finish_ioend_sync(ioend);
}
STATIC ssize_t
unsigned int io_type; /* delalloc / unwritten */
int io_error; /* I/O error code */
atomic_t io_remaining; /* hold count */
- unsigned int io_isasync : 1; /* needs aio_complete */
unsigned int io_isdirect : 1;/* direct I/O */
struct inode *io_inode; /* file being written to */
struct buffer_head *io_buffer_head;/* buffer linked list head */
xfs_off_t io_offset; /* offset in the file */
struct work_struct io_work; /* xfsdatad work queue */
struct xfs_trans *io_append_trans;/* xact. for size update */
- struct kiocb *io_iocb;
- int io_result;
} xfs_ioend_t;
extern const struct address_space_operations xfs_address_space_operations;
BH_Quiet, /* Buffer Error Prinks to be quiet */
BH_Meta, /* Buffer contains metadata */
BH_Prio, /* Buffer should be submitted with REQ_PRIO */
+ BH_Defer_Completion, /* Defer AIO completion to workqueue */
BH_PrivateStart,/* not a state bit, but the first bit available
* for private allocation by other entities
BUFFER_FNS(Unwritten, unwritten)
BUFFER_FNS(Meta, meta)
BUFFER_FNS(Prio, prio)
+BUFFER_FNS(Defer_Completion, defer_completion)
#define bh_offset(bh) ((unsigned long)(bh)->b_data & ~PAGE_MASK)
struct cred;
struct swap_info_struct;
struct seq_file;
+struct workqueue_struct;
extern void __init inode_init(void);
extern void __init inode_init_early(void);
typedef int (get_block_t)(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create);
typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
- ssize_t bytes, void *private, int ret,
- bool is_async);
+ ssize_t bytes, void *private);
#define MAY_EXEC 0x00000001
#define MAY_WRITE 0x00000002
/* Being remounted read-only */
int s_readonly_remount;
+
+ /* AIO completions deferred from interrupt context */
+ struct workqueue_struct *s_dio_done_wq;
};
/* superblock cache pruning functions */
S_VERSION = 8,
};
-extern void touch_atime(struct path *);
+extern void touch_atime(const struct path *);
static inline void file_accessed(struct file *file)
{
if (!(file->f_flags & O_NOATIME))
extern int user_path_at(int, const char __user *, unsigned, struct path *);
extern int user_path_at_empty(int, const char __user *, unsigned, struct path *, int *empty);
+extern int user_path_umountat(int, const char __user *, unsigned int, struct path *);
#define user_path(name, path) user_path_at(AT_FDCWD, name, LOOKUP_FOLLOW, path)
#define user_lpath(name, path) user_path_at(AT_FDCWD, name, 0, path)
#define IBS_FETCH_CODE 13
#define IBS_OP_CODE 14
-struct super_block;
struct dentry;
struct file_operations;
struct pt_regs;
struct oprofile_operations {
/* create any necessary configuration files in the oprofile fs.
* Optional. */
- int (*create_files)(struct super_block * sb, struct dentry * root);
+ int (*create_files)(struct dentry * root);
/* Do any necessary interrupt setup. Optional. */
int (*setup)(void);
/* Do any necessary interrupt shutdown. Optional. */
* Create a file of the given name as a child of the given root, with
* the specified file operations.
*/
-int oprofilefs_create_file(struct super_block * sb, struct dentry * root,
+int oprofilefs_create_file(struct dentry * root,
char const * name, const struct file_operations * fops);
-int oprofilefs_create_file_perm(struct super_block * sb, struct dentry * root,
+int oprofilefs_create_file_perm(struct dentry * root,
char const * name, const struct file_operations * fops, int perm);
/** Create a file for read/write access to an unsigned long. */
-int oprofilefs_create_ulong(struct super_block * sb, struct dentry * root,
+int oprofilefs_create_ulong(struct dentry * root,
char const * name, ulong * val);
/** Create a file for read-only access to an unsigned long. */
-int oprofilefs_create_ro_ulong(struct super_block * sb, struct dentry * root,
+int oprofilefs_create_ro_ulong(struct dentry * root,
char const * name, ulong * val);
/** Create a file for read-only access to an atomic_t. */
-int oprofilefs_create_ro_atomic(struct super_block * sb, struct dentry * root,
+int oprofilefs_create_ro_atomic(struct dentry * root,
char const * name, atomic_t * val);
/** create a directory */
-struct dentry * oprofilefs_mkdir(struct super_block * sb, struct dentry * root,
- char const * name);
+struct dentry *oprofilefs_mkdir(struct dentry *parent, char const *name);
/**
* Write the given asciz string to the given user buffer @buf, updating *offset
/* Sets info->hdr and info->len. */
static int copy_module_from_fd(int fd, struct load_info *info)
{
- struct file *file;
+ struct fd f = fdget(fd);
int err;
struct kstat stat;
loff_t pos;
ssize_t bytes = 0;
- file = fget(fd);
- if (!file)
+ if (!f.file)
return -ENOEXEC;
- err = security_kernel_module_from_file(file);
+ err = security_kernel_module_from_file(f.file);
if (err)
goto out;
- err = vfs_getattr(&file->f_path, &stat);
+ err = vfs_getattr(&f.file->f_path, &stat);
if (err)
goto out;
pos = 0;
while (pos < stat.size) {
- bytes = kernel_read(file, pos, (char *)(info->hdr) + pos,
+ bytes = kernel_read(f.file, pos, (char *)(info->hdr) + pos,
stat.size - pos);
if (bytes < 0) {
vfree(info->hdr);
info->len = pos;
out:
- fput(file);
+ fdput(f);
return err;
}
#include <linux/math64.h>
#include <linux/uaccess.h>
#include <linux/ioport.h>
+#include <linux/dcache.h>
#include <net/addrconf.h>
#include <asm/page.h> /* for PAGE_SIZE */
return buf;
}
+static void widen(char *buf, char *end, unsigned len, unsigned spaces)
+{
+ size_t size;
+ if (buf >= end) /* nowhere to put anything */
+ return;
+ size = end - buf;
+ if (size <= spaces) {
+ memset(buf, ' ', size);
+ return;
+ }
+ if (len) {
+ if (len > size - spaces)
+ len = size - spaces;
+ memmove(buf + spaces, buf, len);
+ }
+ memset(buf, ' ', spaces);
+}
+
+static noinline_for_stack
+char *dentry_name(char *buf, char *end, const struct dentry *d, struct printf_spec spec,
+ const char *fmt)
+{
+ const char *array[4], *s;
+ const struct dentry *p;
+ int depth;
+ int i, n;
+
+ switch (fmt[1]) {
+ case '2': case '3': case '4':
+ depth = fmt[1] - '0';
+ break;
+ default:
+ depth = 1;
+ }
+
+ rcu_read_lock();
+ for (i = 0; i < depth; i++, d = p) {
+ p = ACCESS_ONCE(d->d_parent);
+ array[i] = ACCESS_ONCE(d->d_name.name);
+ if (p == d) {
+ if (i)
+ array[i] = "";
+ i++;
+ break;
+ }
+ }
+ s = array[--i];
+ for (n = 0; n != spec.precision; n++, buf++) {
+ char c = *s++;
+ if (!c) {
+ if (!i)
+ break;
+ c = '/';
+ s = array[--i];
+ }
+ if (buf < end)
+ *buf = c;
+ }
+ rcu_read_unlock();
+ if (n < spec.field_width) {
+ /* we want to pad the sucker */
+ unsigned spaces = spec.field_width - n;
+ if (!(spec.flags & LEFT)) {
+ widen(buf - n, end, n, spaces);
+ return buf + spaces;
+ }
+ while (spaces--) {
+ if (buf < end)
+ *buf = ' ';
+ ++buf;
+ }
+ }
+ return buf;
+}
+
static noinline_for_stack
char *symbol_string(char *buf, char *end, void *ptr,
struct printf_spec spec, const char *fmt)
spec.base = 16;
return number(buf, end,
(unsigned long long) *((phys_addr_t *)ptr), spec);
+ case 'd':
+ return dentry_name(buf, end, ptr, spec, fmt);
+ case 'D':
+ return dentry_name(buf, end,
+ ((const struct file *)ptr)->f_path.dentry,
+ spec, fmt);
}
spec.flags |= SMALL;
if (spec.field_width == -1) {
ret = __generic_file_aio_write(iocb, iov, nr_segs, &iocb->ki_pos);
mutex_unlock(&inode->i_mutex);
- if (ret > 0 || ret == -EIOCBQUEUED) {
+ if (ret > 0) {
ssize_t err;
err = generic_write_sync(file, pos, ret);
* tmpfs instance, limiting inodes to one per page of lowmem;
* but the internal instance is left unlimited.
*/
- if (!(sb->s_flags & MS_NOUSER)) {
+ if (!(sb->s_flags & MS_KERNMOUNT)) {
sbinfo->max_blocks = shmem_default_max_blocks();
sbinfo->max_inodes = shmem_default_max_inodes();
if (shmem_parse_options(data, sbinfo, false)) {
err = -EINVAL;
goto failed;
}
+ } else {
+ sb->s_flags |= MS_NOUSER;
}
sb->s_export_op = &shmem_export_ops;
sb->s_flags |= MS_NOSEC;
goto out2;
}
- shm_mnt = vfs_kern_mount(&shmem_fs_type, MS_NOUSER,
- shmem_fs_type.name, NULL);
+ shm_mnt = kern_mount(&shmem_fs_type);
if (IS_ERR(shm_mnt)) {
error = PTR_ERR(shm_mnt);
printk(KERN_ERR "Could not kern_mount tmpfs\n");
{
struct kvm_irq_routing_table *irq_rt;
struct _irqfd *irqfd, *tmp;
- struct file *file = NULL;
+ struct fd f;
struct eventfd_ctx *eventfd = NULL, *resamplefd = NULL;
int ret;
unsigned int events;
INIT_WORK(&irqfd->inject, irqfd_inject);
INIT_WORK(&irqfd->shutdown, irqfd_shutdown);
- file = eventfd_fget(args->fd);
- if (IS_ERR(file)) {
- ret = PTR_ERR(file);
- goto fail;
+ f = fdget(args->fd);
+ if (!f.file) {
+ ret = -EBADF;
+ goto out;
}
- eventfd = eventfd_ctx_fileget(file);
+ eventfd = eventfd_ctx_fileget(f.file);
if (IS_ERR(eventfd)) {
ret = PTR_ERR(eventfd);
goto fail;
lockdep_is_held(&kvm->irqfds.lock));
irqfd_update(kvm, irqfd, irq_rt);
- events = file->f_op->poll(file, &irqfd->pt);
+ events = f.file->f_op->poll(f.file, &irqfd->pt);
list_add_tail(&irqfd->list, &kvm->irqfds.items);
* do not drop the file until the irqfd is fully initialized, otherwise
* we might race against the POLLHUP
*/
- fput(file);
+ fdput(f);
return 0;
if (eventfd && !IS_ERR(eventfd))
eventfd_ctx_put(eventfd);
- if (!IS_ERR(file))
- fput(file);
+ fdput(f);
+out:
kfree(irqfd);
return ret;
}
projects / karo-tx-linux.git / commitdiff