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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-05 17:50:26 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-05 17:50:26 +0200 |
| commit | 45d9a2220f6004b47c362cc7fc7cf9a73cb6353a (patch) | |
| tree | 4e2217464c5cd71674a6ffff1f3dddaeb52556b7 | |
| parent | Merge branch 'ipmi' (diff) | |
| parent | direct-io: Handle O_(D)SYNC AIO (diff) | |
| download | linux-45d9a2220f6004b47c362cc7fc7cf9a73cb6353a.tar.xz linux-45d9a2220f6004b47c362cc7fc7cf9a73cb6353a.zip | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs pile 1 from Al Viro:
"Unfortunately, this merge window it'll have a be a lot of small piles -
my fault, actually, for not keeping #for-next in anything that would
resemble a sane shape ;-/
This pile: assorted fixes (the first 3 are -stable fodder, IMO) and
cleanups + %pd/%pD formats (dentry/file pathname, up to 4 last
components) + several long-standing patches from various folks.
There definitely will be a lot more (starting with Miklos'
check_submount_and_drop() series)"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (26 commits)
direct-io: Handle O_(D)SYNC AIO
direct-io: Implement generic deferred AIO completions
add formats for dentry/file pathnames
kvm eventfd: switch to fdget
powerpc kvm: use fdget
switch fchmod() to fdget
switch epoll_ctl() to fdget
switch copy_module_from_fd() to fdget
git simplify nilfs check for busy subtree
ibmasmfs: don't bother passing superblock when not needed
don't pass superblock to hypfs_{mkdir,create*}
don't pass superblock to hypfs_diag_create_files
don't pass superblock to hypfs_vm_create_files()
oprofile: get rid of pointless forward declarations of struct super_block
oprofilefs_create_...() do not need superblock argument
oprofilefs_mkdir() doesn't need superblock argument
don't bother with passing superblock to oprofile_create_stats_files()
oprofile: don't bother with passing superblock to ->create_files()
don't bother passing sb to oprofile_create_files()
coh901318: don't open-code simple_read_from_buffer()
...
52 files changed, 738 insertions, 502 deletions
diff --git a/Documentation/printk-formats.txt b/Documentation/printk-formats.txt index 3e8cb73ac43c..9552a3299ec9 100644 --- a/Documentation/printk-formats.txt +++ b/Documentation/printk-formats.txt @@ -168,6 +168,15 @@ UUID/GUID addresses: 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 diff --git a/arch/alpha/oprofile/common.c b/arch/alpha/oprofile/common.c index b8ce18f485d3..310a4ce1dccc 100644 --- a/arch/alpha/oprofile/common.c +++ b/arch/alpha/oprofile/common.c @@ -106,7 +106,7 @@ op_axp_stop(void) } static int -op_axp_create_files(struct super_block *sb, struct dentry *root) +op_axp_create_files(struct dentry *root) { int i; @@ -115,23 +115,23 @@ op_axp_create_files(struct super_block *sb, struct dentry *root) 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); } diff --git a/arch/avr32/oprofile/op_model_avr32.c b/arch/avr32/oprofile/op_model_avr32.c index f74b7809e089..08308be2c02c 100644 --- a/arch/avr32/oprofile/op_model_avr32.c +++ b/arch/avr32/oprofile/op_model_avr32.c @@ -97,8 +97,7 @@ static irqreturn_t avr32_perf_counter_interrupt(int irq, void *dev_id) 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; @@ -106,21 +105,21 @@ static int avr32_perf_counter_create_files(struct super_block *sb, 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); } diff --git a/arch/mips/oprofile/common.c b/arch/mips/oprofile/common.c index af763e838fdd..5e5424753b56 100644 --- a/arch/mips/oprofile/common.c +++ b/arch/mips/oprofile/common.c @@ -33,7 +33,7 @@ static int op_mips_setup(void) 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; @@ -42,16 +42,16 @@ static int op_mips_create_files(struct super_block *sb, struct dentry *root) 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; diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index f55e14cd1762..07c0106fab76 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -825,39 +825,39 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, #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 */ diff --git a/arch/powerpc/oprofile/common.c b/arch/powerpc/oprofile/common.c index 4f51025f5b00..c77348c5d463 100644 --- a/arch/powerpc/oprofile/common.c +++ b/arch/powerpc/oprofile/common.c @@ -119,7 +119,7 @@ static void op_powerpc_stop(void) 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; @@ -128,9 +128,9 @@ static int op_powerpc_create_files(struct super_block *sb, struct dentry *root) * 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 @@ -142,7 +142,7 @@ static int op_powerpc_create_files(struct super_block *sb, struct dentry *root) * 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 @@ -160,11 +160,11 @@ static int op_powerpc_create_files(struct super_block *sb, struct dentry *root) 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 @@ -173,14 +173,14 @@ static int op_powerpc_create_files(struct super_block *sb, struct dentry *root) * 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; diff --git a/arch/s390/hypfs/hypfs.h b/arch/s390/hypfs/hypfs.h index f41e0ef7fdf9..79f2ac55253f 100644 --- a/arch/s390/hypfs/hypfs.h +++ b/arch/s390/hypfs/hypfs.h @@ -18,26 +18,23 @@ #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; diff --git a/arch/s390/hypfs/hypfs_diag.c b/arch/s390/hypfs/hypfs_diag.c index 138893e5f736..5eeffeefae06 100644 --- a/arch/s390/hypfs/hypfs_diag.c +++ b/arch/s390/hypfs/hypfs_diag.c @@ -623,8 +623,7 @@ void hypfs_diag_exit(void) * ******************************************* */ -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]; @@ -632,30 +631,29 @@ static int hypfs_create_cpu_files(struct super_block *sb, 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; @@ -665,16 +663,16 @@ static void *hypfs_create_lpar_files(struct super_block *sb, 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); @@ -682,8 +680,7 @@ static void *hypfs_create_lpar_files(struct super_block *sb, 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]; @@ -691,32 +688,31 @@ static int hypfs_create_phys_cpu_files(struct super_block *sb, 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); @@ -724,7 +720,7 @@ static void *hypfs_create_phys_files(struct super_block *sb, 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; @@ -735,7 +731,7 @@ int hypfs_diag_create_files(struct super_block *sb, struct dentry *root) 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; @@ -743,25 +739,25 @@ int hypfs_diag_create_files(struct super_block *sb, struct dentry *root) 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; diff --git a/arch/s390/hypfs/hypfs_vm.c b/arch/s390/hypfs/hypfs_vm.c index f364dcf77e8e..24908ce149f1 100644 --- a/arch/s390/hypfs/hypfs_vm.c +++ b/arch/s390/hypfs/hypfs_vm.c @@ -107,16 +107,15 @@ static void diag2fc_free(const void *data) 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] = {}; @@ -130,46 +129,46 @@ static int hpyfs_vm_create_guest(struct super_block *sb, 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; @@ -181,38 +180,38 @@ int hypfs_vm_create_files(struct super_block *sb, struct dentry *root) 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; } diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c index 7a539f4f5e30..ddfe09b45134 100644 --- a/arch/s390/hypfs/inode.c +++ b/arch/s390/hypfs/inode.c @@ -28,8 +28,7 @@ #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 */ @@ -193,9 +192,9 @@ static ssize_t hypfs_aio_write(struct kiocb *iocb, const struct iovec *iov, } 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); @@ -302,12 +301,12 @@ static int hypfs_fill_super(struct super_block *sb, void *data, int silent) 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); @@ -334,8 +333,7 @@ static void hypfs_kill_super(struct super_block *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; @@ -347,7 +345,7 @@ static struct dentry *hypfs_create_file(struct super_block *sb, 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); @@ -373,24 +371,22 @@ fail: 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 @@ -400,7 +396,7 @@ static struct dentry *hypfs_create_update_file(struct super_block *sb, 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; @@ -412,7 +408,7 @@ struct dentry *hypfs_create_u64(struct super_block *sb, struct dentry *dir, 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); @@ -421,7 +417,7 @@ struct dentry *hypfs_create_u64(struct super_block *sb, struct dentry *dir, 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; @@ -432,7 +428,7 @@ struct dentry *hypfs_create_str(struct super_block *sb, struct dentry *dir, 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); diff --git a/arch/s390/oprofile/init.c b/arch/s390/oprofile/init.c index 930783d2c99b..04e1b6a85362 100644 --- a/arch/s390/oprofile/init.c +++ b/arch/s390/oprofile/init.c @@ -346,16 +346,15 @@ static const struct file_operations timer_enabled_fops = { }; -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; @@ -376,17 +375,17 @@ static int oprofile_create_hwsampling_files(struct super_block *sb, * 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 { @@ -396,19 +395,19 @@ static int oprofile_create_hwsampling_files(struct super_block *sb, * 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; diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c index 48768df2471a..6890d8498e0b 100644 --- a/arch/x86/oprofile/nmi_int.c +++ b/arch/x86/oprofile/nmi_int.c @@ -403,7 +403,7 @@ static void nmi_cpu_down(void *dummy) 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; @@ -420,14 +420,14 @@ static int nmi_create_files(struct super_block *sb, struct dentry *root) 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; diff --git a/arch/x86/oprofile/op_model_amd.c b/arch/x86/oprofile/op_model_amd.c index b2b94438ff05..50d86c0e9ba4 100644 --- a/arch/x86/oprofile/op_model_amd.c +++ b/arch/x86/oprofile/op_model_amd.c @@ -454,16 +454,16 @@ static void init_ibs(void) 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; @@ -479,26 +479,26 @@ static int setup_ibs_files(struct super_block *sb, struct dentry *root) 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); } diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c index 9bfaddd57ef1..31011d2a26fc 100644 --- a/drivers/dma/coh901318.c +++ b/drivers/dma/coh901318.c @@ -1339,15 +1339,14 @@ static int coh901318_debugfs_read(struct file *file, char __user *buf, { 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"); @@ -1357,26 +1356,11 @@ static int coh901318_debugfs_read(struct file *file, char __user *buf, 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 = { diff --git a/drivers/misc/ibmasm/ibmasmfs.c b/drivers/misc/ibmasm/ibmasmfs.c index ce5b75616b45..e8b933111e0d 100644 --- a/drivers/misc/ibmasm/ibmasmfs.c +++ b/drivers/misc/ibmasm/ibmasmfs.c @@ -149,8 +149,7 @@ static struct inode *ibmasmfs_make_inode(struct super_block *sb, int mode) 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, @@ -163,7 +162,7 @@ static struct dentry *ibmasmfs_create_file (struct super_block *sb, 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; @@ -176,8 +175,7 @@ static struct dentry *ibmasmfs_create_file (struct super_block *sb, 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; @@ -187,7 +185,7 @@ static struct dentry *ibmasmfs_create_dir (struct super_block *sb, 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; @@ -612,20 +610,20 @@ static void ibmasmfs_create_files (struct super_block *sb) 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); } } diff --git a/drivers/oprofile/oprof.h b/drivers/oprofile/oprof.h index d32ef816337c..d5412060ab0f 100644 --- a/drivers/oprofile/oprof.h +++ b/drivers/oprofile/oprof.h @@ -30,10 +30,9 @@ extern struct oprofile_operations oprofile_ops; 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); diff --git a/drivers/oprofile/oprofile_files.c b/drivers/oprofile/oprofile_files.c index 84a208dbed93..ee2cfce358b9 100644 --- a/drivers/oprofile/oprofile_files.c +++ b/drivers/oprofile/oprofile_files.c @@ -175,7 +175,7 @@ static const struct file_operations dump_fops = { .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; @@ -183,19 +183,19 @@ void oprofile_create_files(struct super_block *sb, struct dentry *root) 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); } diff --git a/drivers/oprofile/oprofile_perf.c b/drivers/oprofile/oprofile_perf.c index f3cfa0b9adfa..d5b2732b1b81 100644 --- a/drivers/oprofile/oprofile_perf.c +++ b/drivers/oprofile/oprofile_perf.c @@ -138,7 +138,7 @@ static void op_perf_stop(void) 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; @@ -147,13 +147,13 @@ static int oprofile_perf_create_files(struct super_block *sb, struct dentry *roo 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; diff --git a/drivers/oprofile/oprofile_stats.c b/drivers/oprofile/oprofile_stats.c index 917d28ebeacd..59659cea4582 100644 --- a/drivers/oprofile/oprofile_stats.c +++ b/drivers/oprofile/oprofile_stats.c @@ -38,7 +38,7 @@ void oprofile_reset_stats(void) } -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; @@ -46,39 +46,39 @@ void oprofile_create_stats_files(struct super_block *sb, struct dentry *root) 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 } diff --git a/drivers/oprofile/oprofile_stats.h b/drivers/oprofile/oprofile_stats.h index 38b6fc028984..1fc622bd1834 100644 --- a/drivers/oprofile/oprofile_stats.h +++ b/drivers/oprofile/oprofile_stats.h @@ -25,10 +25,9 @@ extern struct oprofile_stat_struct oprofile_stats; /* 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 */ diff --git a/drivers/oprofile/oprofilefs.c b/drivers/oprofile/oprofilefs.c index 7c12d9c2b230..3f493459378f 100644 --- a/drivers/oprofile/oprofilefs.c +++ b/drivers/oprofile/oprofilefs.c @@ -132,9 +132,8 @@ static const struct file_operations ulong_ro_fops = { }; -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; @@ -145,7 +144,7 @@ static int __oprofilefs_create_file(struct super_block *sb, 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); @@ -159,18 +158,18 @@ static int __oprofilefs_create_file(struct super_block *sb, } -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); } @@ -189,50 +188,49 @@ static const struct file_operations atomic_ro_fops = { }; -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; } @@ -256,7 +254,7 @@ static int oprofilefs_fill_super(struct super_block *sb, void *data, int silent) 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; diff --git a/fs/block_dev.c b/fs/block_dev.c index c7bda5cd3da7..1173a4ee0830 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1519,7 +1519,7 @@ ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov, 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); diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 8e686a427ce2..4d2eb6417145 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1727,7 +1727,7 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, */ 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; diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 7e36ae34e947..9d0dd952ad79 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -2553,7 +2553,7 @@ cifs_writev(struct kiocb *iocb, const struct iovec *iov, mutex_unlock(&inode->i_mutex); } - if (rc > 0 || rc == -EIOCBQUEUED) { + if (rc > 0) { ssize_t err; err = generic_write_sync(file, pos, rc); diff --git a/fs/dcache.c b/fs/dcache.c index 96655f4f4574..5aa53bc056ba 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -472,7 +472,7 @@ relock: * 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); @@ -727,6 +727,14 @@ restart: 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); @@ -911,7 +919,8 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry) * 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); diff --git a/fs/direct-io.c b/fs/direct-io.c index 7ab90f5081ee..1782023bd68a 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -127,6 +127,7 @@ struct dio { 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 */ @@ -141,7 +142,10 @@ struct dio { * 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; @@ -221,16 +225,16 @@ static inline struct page *dio_get_page(struct dio *dio, * 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; @@ -258,19 +262,36 @@ static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret, bool is 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. */ @@ -290,8 +311,13 @@ static void dio_bio_end_aio(struct bio *bio, int error) 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); + } } } @@ -511,6 +537,41 @@ static inline int dio_bio_reap(struct dio *dio, struct dio_submit *sdio) } /* + * 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 * fs blocksize, (1 << inode->i_blkbits). @@ -581,6 +642,9 @@ static int get_more_blocks(struct dio *dio, struct dio_submit *sdio, /* 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; } @@ -1129,11 +1193,6 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode, } /* - * 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 * even for AIO, we need to wait for i/o to complete before @@ -1141,11 +1200,33 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode, */ 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; @@ -1269,7 +1350,6 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode, if (drop_refcount(dio) == 0) { retval = dio_complete(dio, offset, retval, false); - kmem_cache_free(dio_cache, dio); } else BUG_ON(retval != -EIOCBQUEUED); diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 9ad17b15b454..293f86741ddb 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -1792,7 +1792,7 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd, { 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; @@ -1802,20 +1802,19 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd, 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 */ @@ -1828,14 +1827,14 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd, * 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 @@ -1854,14 +1853,14 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd, 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); @@ -1871,14 +1870,14 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd, * 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(); @@ -1903,9 +1902,9 @@ error_tgt_fput: if (did_lock_epmutex) mutex_unlock(&epmutex); - fput(tfile); + fdput(tf); error_fput: - fput(file); + fdput(f); error_return: return error; diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 06b488dca666..af815ea9d7cc 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -180,7 +180,6 @@ struct ext4_map_blocks { * 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 @@ -196,8 +195,6 @@ typedef struct ext4_io_end { 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; @@ -914,11 +911,9 @@ struct ext4_inode_info { * 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; @@ -1290,8 +1285,6 @@ struct ext4_sb_info { 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; @@ -1354,9 +1347,6 @@ static inline void ext4_set_io_unwritten_flag(struct inode *inode, 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); } @@ -2760,7 +2750,6 @@ extern void ext4_put_io_end_defer(ext4_io_end_t *io_end); 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, diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 319c9d26279a..3da21945ff1f 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -149,7 +149,7 @@ ext4_file_dio_write(struct kiocb *iocb, const struct iovec *iov, 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); diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 9115f2807515..c79fd7dabe79 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -727,8 +727,12 @@ static int _ext4_get_block(struct inode *inode, sector_t iblock, 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; } @@ -3024,19 +3028,13 @@ static int ext4_get_block_write_nolock(struct inode *inode, sector_t iblock, } 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", @@ -3046,11 +3044,7 @@ static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset, 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); } /* @@ -3135,7 +3129,6 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb, ret = -ENOMEM; goto retake_lock; } - io_end->flag |= EXT4_IO_END_DIRECT; /* * Grab reference for DIO. Will be dropped in ext4_end_io_dio() */ @@ -3180,13 +3173,6 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb, 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; } diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c index 6625d210fb45..d7d0c7b46ed4 100644 --- a/fs/ext4/page-io.c +++ b/fs/ext4/page-io.c @@ -123,10 +123,6 @@ static void ext4_release_io_end(ext4_io_end_t *io_end) 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); } @@ -204,19 +200,14 @@ static void ext4_add_complete_io(ext4_io_end_t *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); } @@ -256,13 +247,6 @@ void ext4_end_io_rsv_work(struct work_struct *work) 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); diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 42337141e79f..049c8a8bdc0e 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -762,9 +762,7 @@ static void ext4_put_super(struct super_block *sb) 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) { @@ -875,14 +873,12 @@ static struct inode *ext4_alloc_inode(struct super_block *sb) #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; } @@ -3995,14 +3991,6 @@ no_journal: 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. @@ -4156,8 +4144,6 @@ failed_mount4: 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); @@ -4605,7 +4591,6 @@ static int ext4_sync_fs(struct super_block *sb, int wait) 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 @@ -4641,7 +4626,6 @@ static int ext4_sync_fs_nojournal(struct super_block *sb, int wait) 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); diff --git a/fs/file_table.c b/fs/file_table.c index b44e4c559786..322cd37626cb 100644 --- a/fs/file_table.c +++ b/fs/file_table.c @@ -385,6 +385,10 @@ static inline void __file_sb_list_add(struct file *file, struct super_block *sb) */ 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); @@ -450,8 +454,6 @@ void mark_files_ro(struct super_block *sb) 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)) diff --git a/fs/inode.c b/fs/inode.c index d6dfb09c8280..93a0625b46e4 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -1525,7 +1525,7 @@ static int update_time(struct inode *inode, struct timespec *time, int flags) * 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; diff --git a/fs/namei.c b/fs/namei.c index 2c30c84d4ea1..f415c6683a83 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -2222,6 +2222,188 @@ user_path_parent(int dfd, const char __user *path, struct nameidata *nd, 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. diff --git a/fs/namespace.c b/fs/namespace.c index a45ba4f267fe..ad8ea9bc2518 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1318,7 +1318,7 @@ SYSCALL_DEFINE2(umount, char __user *, name, int, flags) 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); diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index c2a4701d7286..d9454fe5653f 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -1816,10 +1816,7 @@ static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, 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; @@ -1859,14 +1856,19 @@ static __be32 nfsd4_encode_path(const struct path *root, 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--; } diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index af3ba0478cdf..7ac2a122ca1d 100644 --- a/fs/nilfs2/super.c +++ b/fs/nilfs2/super.c @@ -994,23 +994,16 @@ static int nilfs_attach_snapshot(struct super_block *s, __u64 cno, 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) @@ -1034,8 +1027,7 @@ 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); @@ -1331,11 +1323,8 @@ nilfs_mount(struct file_system_type *fs_type, int flags, 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) ? @@ -1343,8 +1332,7 @@ nilfs_mount(struct file_system_type *fs_type, int flags, 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. diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c index 2abf97b2a592..94417a85ce6e 100644 --- a/fs/ocfs2/aops.c +++ b/fs/ocfs2/aops.c @@ -565,9 +565,7 @@ bail: 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; @@ -592,10 +590,6 @@ static void ocfs2_dio_end_io(struct kiocb *iocb, level = ocfs2_iocb_rw_locked_level(iocb); ocfs2_rw_unlock(inode, level); - - inode_dio_done(inode); - if (is_async) - aio_complete(iocb, ret, 0); } /* diff --git a/fs/open.c b/fs/open.c index 7931f76acc2b..8070825b285b 100644 --- a/fs/open.c +++ b/fs/open.c @@ -485,14 +485,13 @@ out_unlock: 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; } diff --git a/fs/super.c b/fs/super.c index 68307c029228..5536a95186e2 100644 --- a/fs/super.c +++ b/fs/super.c @@ -152,15 +152,9 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags) 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) @@ -228,6 +222,7 @@ err_out: free_percpu(s->s_files); #endif destroy_sb_writers(s); +out_free_sb: kfree(s); s = NULL; goto out; @@ -414,6 +409,11 @@ void generic_shutdown_super(struct super_block *sb) 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); diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 596ec71da00e..e11d654af786 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -86,14 +86,6 @@ xfs_destroy_ioend( 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); } @@ -281,7 +273,6 @@ xfs_alloc_ioend( * 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; @@ -291,8 +282,6 @@ xfs_alloc_ioend( 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); @@ -1292,8 +1281,10 @@ __xfs_get_blocks( 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); } } @@ -1390,9 +1381,7 @@ xfs_end_io_direct_write( struct kiocb *iocb, loff_t offset, ssize_t size, - void *private, - int ret, - bool is_async) + void *private) { struct xfs_ioend *ioend = iocb->private; @@ -1414,17 +1403,10 @@ xfs_end_io_direct_write( 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 diff --git a/fs/xfs/xfs_aops.h b/fs/xfs/xfs_aops.h index c325abb8d61a..f94dd459dff9 100644 --- a/fs/xfs/xfs_aops.h +++ b/fs/xfs/xfs_aops.h @@ -45,7 +45,6 @@ typedef struct xfs_ioend { 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 */ @@ -54,8 +53,6 @@ typedef struct xfs_ioend { 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; diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index 91fa9a94ae92..d77797a52b7b 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -36,6 +36,7 @@ enum bh_state_bits { 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 @@ -128,6 +129,7 @@ BUFFER_FNS(Write_EIO, write_io_error) 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) diff --git a/include/linux/fs.h b/include/linux/fs.h index e7893523f81f..3b4cd8296e41 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -46,6 +46,7 @@ struct vfsmount; 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); @@ -63,8 +64,7 @@ struct buffer_head; 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 @@ -1328,6 +1328,9 @@ struct super_block { /* 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 */ @@ -1804,7 +1807,7 @@ enum file_time_flags { 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)) diff --git a/include/linux/namei.h b/include/linux/namei.h index 5a5ff57ceed4..cd09751c71a0 100644 --- a/include/linux/namei.h +++ b/include/linux/namei.h @@ -58,6 +58,7 @@ enum {LAST_NORM, LAST_ROOT, LAST_DOT, LAST_DOTDOT, LAST_BIND}; 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) diff --git a/include/linux/oprofile.h b/include/linux/oprofile.h index a4c562453f6b..b2a0f15f11fe 100644 --- a/include/linux/oprofile.h +++ b/include/linux/oprofile.h @@ -42,7 +42,6 @@ #define IBS_FETCH_CODE 13 #define IBS_OP_CODE 14 -struct super_block; struct dentry; struct file_operations; struct pt_regs; @@ -51,7 +50,7 @@ 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. */ @@ -125,27 +124,26 @@ void oprofile_add_trace(unsigned long eip); * 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 diff --git a/kernel/module.c b/kernel/module.c index 9f5ddae72f44..dc582749fa13 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -2549,21 +2549,20 @@ static int copy_module_from_user(const void __user *umod, unsigned long len, /* 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; @@ -2586,7 +2585,7 @@ static int copy_module_from_fd(int fd, struct load_info *info) 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); @@ -2600,7 +2599,7 @@ static int copy_module_from_fd(int fd, struct load_info *info) info->len = pos; out: - fput(file); + fdput(f); return err; } diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 739a36366b79..26559bdb4c49 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -26,6 +26,7 @@ #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 */ @@ -532,6 +533,81 @@ char *string(char *buf, char *end, const char *s, struct printf_spec spec) 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) @@ -1253,6 +1329,12 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr, 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) { diff --git a/mm/filemap.c b/mm/filemap.c index 4b51ac1acae7..731a2c24532d 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -2550,7 +2550,7 @@ ssize_t generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov, 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); diff --git a/mm/shmem.c b/mm/shmem.c index e43dc555069d..526149846d0a 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -2615,13 +2615,15 @@ int shmem_fill_super(struct super_block *sb, void *data, int silent) * 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; @@ -2831,8 +2833,7 @@ int __init shmem_init(void) 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"); diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index 1550637d1b10..abe4d6043b36 100644 --- a/virt/kvm/eventfd.c +++ b/virt/kvm/eventfd.c @@ -291,7 +291,7 @@ kvm_irqfd_assign(struct kvm *kvm, struct kvm_irqfd *args) { 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; @@ -306,13 +306,13 @@ kvm_irqfd_assign(struct kvm *kvm, struct kvm_irqfd *args) 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; @@ -391,7 +391,7 @@ kvm_irqfd_assign(struct kvm *kvm, struct kvm_irqfd *args) 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); @@ -408,7 +408,7 @@ kvm_irqfd_assign(struct kvm *kvm, struct kvm_irqfd *args) * do not drop the file until the irqfd is fully initialized, otherwise * we might race against the POLLHUP */ - fput(file); + fdput(f); return 0; @@ -422,9 +422,9 @@ fail: if (eventfd && !IS_ERR(eventfd)) eventfd_ctx_put(eventfd); - if (!IS_ERR(file)) - fput(file); + fdput(f); +out: kfree(irqfd); return ret; } |