cregit-Linux how code gets into the kernel

Release 4.10 fs/hugetlbfs/inode.c

Directory: fs/hugetlbfs
/*
 * hugetlbpage-backed filesystem.  Based on ramfs.
 *
 * Nadia Yvette Chambers, 2002
 *
 * Copyright (C) 2002 Linus Torvalds.
 * License: GPL
 */


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/thread_info.h>
#include <asm/current.h>
#include <linux/sched.h>		/* remove ASAP */
#include <linux/falloc.h>
#include <linux/fs.h>
#include <linux/mount.h>
#include <linux/file.h>
#include <linux/kernel.h>
#include <linux/writeback.h>
#include <linux/pagemap.h>
#include <linux/highmem.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/capability.h>
#include <linux/ctype.h>
#include <linux/backing-dev.h>
#include <linux/hugetlb.h>
#include <linux/pagevec.h>
#include <linux/parser.h>
#include <linux/mman.h>
#include <linux/slab.h>
#include <linux/dnotify.h>
#include <linux/statfs.h>
#include <linux/security.h>
#include <linux/magic.h>
#include <linux/migrate.h>
#include <linux/uio.h>

#include <linux/uaccess.h>


static const struct super_operations hugetlbfs_ops;

static const struct address_space_operations hugetlbfs_aops;

const struct file_operations hugetlbfs_file_operations;

static const struct inode_operations hugetlbfs_dir_inode_operations;

static const struct inode_operations hugetlbfs_inode_operations;


struct hugetlbfs_config {
	
kuid_t   uid;
	
kgid_t   gid;
	
umode_t mode;
	
long	max_hpages;
	
long	nr_inodes;
	
struct hstate *hstate;
	
long    min_hpages;
};


struct hugetlbfs_inode_info {
	
struct shared_policy policy;
	
struct inode vfs_inode;
};


static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) { return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); }

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david gibsondavid gibson25100.00%1100.00%
Total25100.00%1100.00%

int sysctl_hugetlb_shm_group; enum { Opt_size, Opt_nr_inodes, Opt_mode, Opt_uid, Opt_gid, Opt_pagesize, Opt_min_size, Opt_err, }; static const match_table_t tokens = { {Opt_size, "size=%s"}, {Opt_nr_inodes, "nr_inodes=%s"}, {Opt_mode, "mode=%o"}, {Opt_uid, "uid=%u"}, {Opt_gid, "gid=%u"}, {Opt_pagesize, "pagesize=%s"}, {Opt_min_size, "min_size=%s"}, {Opt_err, NULL}, }; #ifdef CONFIG_NUMA
static inline void hugetlb_set_vma_policy(struct vm_area_struct *vma, struct inode *inode, pgoff_t index) { vma->vm_policy = mpol_shared_policy_lookup(&HUGETLBFS_I(inode)->policy, index); }

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mike kravetzmike kravetz37100.00%1100.00%
Total37100.00%1100.00%


static inline void hugetlb_drop_vma_policy(struct vm_area_struct *vma) { mpol_cond_put(vma->vm_policy); }

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mike kravetzmike kravetz19100.00%1100.00%
Total19100.00%1100.00%

#else
static inline void hugetlb_set_vma_policy(struct vm_area_struct *vma, struct inode *inode, pgoff_t index) { }

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mike kravetzmike kravetz19100.00%1100.00%
Total19100.00%1100.00%


static inline void hugetlb_drop_vma_policy(struct vm_area_struct *vma) { }

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mike kravetzmike kravetz11100.00%1100.00%
Total11100.00%1100.00%

#endif
static void huge_pagevec_release(struct pagevec *pvec) { int i; for (i = 0; i < pagevec_count(pvec); ++i) put_page(pvec->pages[i]); pagevec_reinit(pvec); }

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adam litkeadam litke45100.00%1100.00%
Total45100.00%1100.00%


static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma) { struct inode *inode = file_inode(file); loff_t len, vma_len; int ret; struct hstate *h = hstate_file(file); /* * vma address alignment (but not the pgoff alignment) has * already been checked by prepare_hugepage_range. If you add * any error returns here, do so after setting VM_HUGETLB, so * is_vm_hugetlb_page tests below unmap_region go the right * way when do_mmap_pgoff unwinds (may be important on powerpc * and ia64). */ vma->vm_flags |= VM_HUGETLB | VM_DONTEXPAND; vma->vm_ops = &hugetlb_vm_ops; if (vma->vm_pgoff & (~huge_page_mask(h) >> PAGE_SHIFT)) return -EINVAL; vma_len = (loff_t)(vma->vm_end - vma->vm_start); inode_lock(inode); file_accessed(file); ret = -ENOMEM; len = vma_len + ((loff_t)vma->vm_pgoff << PAGE_SHIFT); if (hugetlb_reserve_pages(inode, vma->vm_pgoff >> huge_page_order(h), len >> huge_page_shift(h), vma, vma->vm_flags)) goto out; ret = 0; if (vma->vm_flags & VM_WRITE && inode->i_size < len) inode->i_size = len; out: inode_unlock(inode); return ret; }

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andrew mortonandrew morton9750.79%421.05%
david gibsondavid gibson2513.09%210.53%
andi kleenandi kleen2211.52%15.26%
hugh dickinshugh dickins94.71%15.26%
oleg nesterovoleg nesterov84.19%15.26%
al viroal viro73.66%315.79%
kenneth w. chenkenneth w. chen73.66%15.26%
yanmin zhangyanmin zhang63.14%15.26%
mel gormanmel gorman63.14%210.53%
adam litkeadam litke21.05%15.26%
konstantin khlebnikovkonstantin khlebnikov10.52%15.26%
becky brucebecky bruce10.52%15.26%
Total191100.00%19100.00%

/* * Called under down_write(mmap_sem). */ #ifndef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
static unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) { struct mm_struct *mm = current->mm; struct vm_area_struct *vma; struct hstate *h = hstate_file(file); struct vm_unmapped_area_info info; if (len & ~huge_page_mask(h)) return -EINVAL; if (len > TASK_SIZE) return -ENOMEM; if (flags & MAP_FIXED) { if (prepare_hugepage_range(file, addr, len)) return -EINVAL; return addr; } if (addr) { addr = ALIGN(addr, huge_page_size(h)); vma = find_vma(mm, addr); if (TASK_SIZE - len >= addr && (!vma || addr + len <= vma->vm_start)) return addr; } info.flags = 0; info.length = len; info.low_limit = TASK_UNMAPPED_BASE; info.high_limit = TASK_SIZE; info.align_mask = PAGE_MASK & ~huge_page_mask(h); info.align_offset = 0; return vm_unmapped_area(&info); }

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andrew mortonandrew morton11254.37%114.29%
michel lespinassemichel lespinasse3516.99%114.29%
benjamin herrenschmidtbenjamin herrenschmidt2411.65%114.29%
andi kleenandi kleen2411.65%114.29%
xiao guangrongxiao guangrong73.40%114.29%
wolfgang wanderwolfgang wander31.46%114.29%
yanmin zhangyanmin zhang10.49%114.29%
Total206100.00%7100.00%

#endif
static size_t hugetlbfs_read_actor(struct page *page, unsigned long offset, struct iov_iter *to, unsigned long size) { size_t copied = 0; int i, chunksize; /* Find which 4k chunk and offset with in that chunk */ i = offset >> PAGE_SHIFT; offset = offset & ~PAGE_MASK; while (size) { size_t n; chunksize = PAGE_SIZE; if (offset) chunksize -= offset; if (chunksize > size) chunksize = size; n = copy_page_to_iter(&page[i], offset, chunksize, to); copied += n; if (n != chunksize) return copied; offset = 0; size -= chunksize; i++; } return copied; }

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badari pulavartybadari pulavarty10081.30%133.33%
al viroal viro2016.26%133.33%
kirill a. shutemovkirill a. shutemov32.44%133.33%
Total123100.00%3100.00%

/* * Support for read() - Find the page attached to f_mapping and copy out the * data. Its *very* similar to do_generic_mapping_read(), we can't use that * since it has PAGE_SIZE assumptions. */
static ssize_t hugetlbfs_read_iter(struct kiocb *iocb, struct iov_iter *to) { struct file *file = iocb->ki_filp; struct hstate *h = hstate_file(file); struct address_space *mapping = file->f_mapping; struct inode *inode = mapping->host; unsigned long index = iocb->ki_pos >> huge_page_shift(h); unsigned long offset = iocb->ki_pos & ~huge_page_mask(h); unsigned long end_index; loff_t isize; ssize_t retval = 0; while (iov_iter_count(to)) { struct page *page; size_t nr, copied; /* nr is the maximum number of bytes to copy from this page */ nr = huge_page_size(h); isize = i_size_read(inode); if (!isize) break; end_index = (isize - 1) >> huge_page_shift(h); if (index > end_index) break; if (index == end_index) { nr = ((isize - 1) & ~huge_page_mask(h)) + 1; if (nr <= offset) break; } nr = nr - offset; /* Find the page */ page = find_lock_page(mapping, index); if (unlikely(page == NULL)) { /* * We have a HOLE, zero out the user-buffer for the * length of the hole or request. */ copied = iov_iter_zero(nr, to); } else { unlock_page(page); /* * We have the page, copy it to user space buffer. */ copied = hugetlbfs_read_actor(page, offset, to, nr); put_page(page); } offset += copied; retval += copied; if (copied != nr && iov_iter_count(to)) { if (!retval) retval = -EFAULT; break; } index += offset >> huge_page_shift(h); offset &= ~huge_page_mask(h); } iocb->ki_pos = ((loff_t)index << huge_page_shift(h)) + offset; return retval; }

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badari pulavartybadari pulavarty17956.11%116.67%
al viroal viro6520.38%116.67%
andi kleenandi kleen3711.60%116.67%
aneesh kumaraneesh kumar3510.97%116.67%
roel kluinroel kluin20.63%116.67%
kirill a. shutemovkirill a. shutemov10.31%116.67%
Total319100.00%6100.00%


static int hugetlbfs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) { return -EINVAL; }

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andrew mortonandrew morton2152.50%150.00%
nick pigginnick piggin1947.50%150.00%
Total40100.00%2100.00%


static int hugetlbfs_write_end(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata) { BUG(); return -EINVAL; }

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andrew mortonandrew morton2151.22%150.00%
nick pigginnick piggin2048.78%150.00%
Total41100.00%2100.00%


static void remove_huge_page(struct page *page) { ClearPageDirty(page); ClearPageUptodate(page); delete_from_page_cache(page); }

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andrew mortonandrew morton2284.62%120.00%
konstantin khlebnikovkonstantin khlebnikov13.85%120.00%
minchan kimminchan kim13.85%120.00%
adrian bunkadrian bunk13.85%120.00%
mike kravetzmike kravetz13.85%120.00%
Total26100.00%5100.00%


static void hugetlb_vmdelete_list(struct rb_root *root, pgoff_t start, pgoff_t end) { struct vm_area_struct *vma; /* * end == 0 indicates that the entire range after * start should be unmapped. */ vma_interval_tree_foreach(vma, root, start, end ? end : ULONG_MAX) { unsigned long v_offset; unsigned long v_end; /* * Can the expression below overflow on 32-bit arches? * No, because the interval tree returns us only those vmas * which overlap the truncated area starting at pgoff, * and no vma on a 32-bit arch can span beyond the 4GB. */ if (vma->vm_pgoff < start) v_offset = (start - vma->vm_pgoff) << PAGE_SHIFT; else v_offset = 0; if (!end) v_end = vma->vm_end; else { v_end = ((end - vma->vm_pgoff) << PAGE_SHIFT) + vma->vm_start; if (v_end > vma->vm_end) v_end = vma->vm_end; } unmap_hugepage_range(vma, vma->vm_start + v_offset, v_end, NULL); } }

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mike kravetzmike kravetz130100.00%1100.00%
Total130100.00%1100.00%

/* * remove_inode_hugepages handles two distinct cases: truncation and hole * punch. There are subtle differences in operation for each case. * * truncation is indicated by end of range being LLONG_MAX * In this case, we first scan the range and release found pages. * After releasing pages, hugetlb_unreserve_pages cleans up region/reserv * maps and global counts. Page faults can not race with truncation * in this routine. hugetlb_no_page() prevents page faults in the * truncated range. It checks i_size before allocation, and again after * with the page table lock for the page held. The same lock must be * acquired to unmap a page. * hole punch is indicated if end is not LLONG_MAX * In the hole punch case we scan the range and release found pages. * Only when releasing a page is the associated region/reserv map * deleted. The region/reserv map for ranges without associated * pages are not modified. Page faults can race with hole punch. * This is indicated if we find a mapped page. * Note: If the passed end of range value is beyond the end of file, but * not LLONG_MAX this routine still performs a hole punch operation. */
static void remove_inode_hugepages(struct inode *inode, loff_t lstart, loff_t lend) { struct hstate *h = hstate_inode(inode); struct address_space *mapping = &inode->i_data; const pgoff_t start = lstart >> huge_page_shift(h); const pgoff_t end = lend >> huge_page_shift(h); struct vm_area_struct pseudo_vma; struct pagevec pvec; pgoff_t next; int i, freed = 0; long lookup_nr = PAGEVEC_SIZE; bool truncate_op = (lend == LLONG_MAX); memset(&pseudo_vma, 0, sizeof(struct vm_area_struct)); pseudo_vma.vm_flags = (VM_HUGETLB | VM_MAYSHARE | VM_SHARED); pagevec_init(&pvec, 0); next = start; while (next < end) { /* * Don't grab more pages than the number left in the range. */ if (end - next < lookup_nr) lookup_nr = end - next; /* * When no more pages are found, we are done. */ if (!pagevec_lookup(&pvec, mapping, next, lookup_nr)) break; for (i = 0; i < pagevec_count(&pvec); ++i) { struct page *page = pvec.pages[i]; u32 hash; /* * The page (index) could be beyond end. This is * only possible in the punch hole case as end is * max page offset in the truncate case. */ next = page->index; if (next >= end) break; hash = hugetlb_fault_mutex_hash(h, current->mm, &pseudo_vma, mapping, next, 0); mutex_lock(&hugetlb_fault_mutex_table[hash]); /* * If page is mapped, it was faulted in after being * unmapped in caller. Unmap (again) now after taking * the fault mutex. The mutex will prevent faults * until we finish removing the page. * * This race can only happen in the hole punch case. * Getting here in a truncate operation is a bug. */ if (unlikely(page_mapped(page))) { BUG_ON(truncate_op); i_mmap_lock_write(mapping); hugetlb_vmdelete_list(&mapping->i_mmap, next * pages_per_huge_page(h), (next + 1) * pages_per_huge_page(h)); i_mmap_unlock_write(mapping); } lock_page(page); /* * We must free the huge page and remove from page * cache (remove_huge_page) BEFORE removing the * region/reserve map (hugetlb_unreserve_pages). In * rare out of memory conditions, removal of the * region/reserve map could fail. Correspondingly, * the subpool and global reserve usage count can need * to be adjusted. */ VM_BUG_ON(PagePrivate(page)); remove_huge_page(page); freed++; if (!truncate_op) { if (unlikely(hugetlb_unreserve_pages(inode, next, next + 1, 1))) hugetlb_fix_reserve_counts(inode); } unlock_page(page); mutex_unlock(&hugetlb_fault_mutex_table[hash]); } ++next; huge_pagevec_release(&pvec); cond_resched(); } if (truncate_op) (void)hugetlb_unreserve_pages(inode, start, LONG_MAX, freed); }

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mike kravetzmike kravetz24762.37%330.00%
andrew mortonandrew morton10526.52%220.00%
andi kleenandi kleen143.54%110.00%
kenneth w. chenkenneth w. chen133.28%110.00%
david gibsondavid gibson123.03%110.00%
zhong jiangzhong jiang41.01%110.00%
adrian bunkadrian bunk10.25%110.00%
Total396100.00%10100.00%


static void hugetlbfs_evict_inode(struct inode *inode) { struct resv_map *resv_map; remove_inode_hugepages(inode, 0, LLONG_MAX); resv_map = (struct resv_map *)inode->i_mapping->private_data; /* root inode doesn't have the resv_map, so we should check it */ if (resv_map) resv_map_release(&resv_map->refs); clear_inode(inode); }

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joonsoo kimjoonsoo kim3155.36%116.67%
andrew mortonandrew morton1323.21%116.67%
christoph hellwigchristoph hellwig712.50%116.67%
mike kravetzmike kravetz35.36%116.67%
al viroal viro11.79%116.67%
jan karajan kara11.79%116.67%
Total56100.00%6100.00%


static int hugetlb_vmtruncate(struct inode *inode, loff_t offset) { pgoff_t pgoff; struct address_space *mapping = inode->i_mapping; struct hstate *h = hstate_inode(inode); BUG_ON(offset & ~huge_page_mask(h)); pgoff = offset >> PAGE_SHIFT; i_size_write(inode, offset); i_mmap_lock_write(mapping); if (!RB_EMPTY_ROOT(&mapping->i_mmap)) hugetlb_vmdelete_list(&mapping->i_mmap, pgoff, 0); i_mmap_unlock_write(mapping); remove_inode_hugepages(inode, offset, LLONG_MAX); return 0; }

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andrew mortonandrew morton7571.43%220.00%
andi kleenandi kleen1413.33%110.00%
mike kravetzmike kravetz65.71%220.00%
ken chenken chen43.81%110.00%
davidlohr buesodavidlohr bueso21.90%110.00%
hugh dickinshugh dickins21.90%110.00%
david gibsondavid gibson10.95%110.00%
michel lespinassemichel lespinasse10.95%110.00%
Total105100.00%10100.00%


static long hugetlbfs_punch_hole(struct inode *inode, loff_t offset, loff_t len) { struct hstate *h = hstate_inode(inode); loff_t hpage_size = huge_page_size(h); loff_t hole_start, hole_end; /* * For hole punch round up the beginning offset of the hole and * round down the end. */ hole_start = round_up(offset, hpage_size); hole_end = round_down(offset + len, hpage_size); if (hole_end > hole_start) { struct address_space *mapping = inode->i_mapping; inode_lock(inode); i_mmap_lock_write(mapping); if (!RB_EMPTY_ROOT(&mapping->i_mmap)) hugetlb_vmdelete_list(&mapping->i_mmap, hole_start >> PAGE_SHIFT, hole_end >> PAGE_SHIFT); i_mmap_unlock_write(mapping); remove_inode_hugepages(inode, hole_start, hole_end); inode_unlock(inode); } return 0; }

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mike kravetzmike kravetz8159.12%116.67%
andrew mortonandrew morton3827.74%233.33%
andi kleenandi kleen118.03%116.67%
christoph hellwigchristoph hellwig53.65%116.67%
al viroal viro21.46%116.67%
Total137100.00%6100.00%


static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset, loff_t len) { struct inode *inode = file_inode(file); struct address_space *mapping = inode->i_mapping; struct hstate *h = hstate_inode(inode); struct vm_area_struct pseudo_vma; struct mm_struct *mm = current->mm; loff_t hpage_size = huge_page_size(h); unsigned long hpage_shift = huge_page_shift(h); pgoff_t start, index, end; int error; u32 hash; if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) return -EOPNOTSUPP; if (mode & FALLOC_FL_PUNCH_HOLE) return hugetlbfs_punch_hole(inode, offset, len); /* * Default preallocate case. * For this range, start is rounded down and end is rounded up * as well as being converted to page offsets. */ start = offset >> hpage_shift; end = (offset + len + hpage_size - 1) >> hpage_shift; inode_lock(inode); /* We need to check rlimit even when FALLOC_FL_KEEP_SIZE */ error = inode_newsize_ok(inode, offset + len); if (error) goto out; /* * Initialize a pseudo vma as this is required by the huge page * allocation routines. If NUMA is configured, use page index * as input to create an allocation policy. */ memset(&pseudo_vma, 0, sizeof(struct vm_area_struct)); pseudo_vma.vm_flags = (VM_HUGETLB | VM_MAYSHARE | VM_SHARED); pseudo_vma.vm_file = file; for (index = start; index < end; index++) { /* * This is supposed to be the vaddr where the page is being * faulted in, but we have no vaddr here. */ struct page *page; unsigned long addr; int avoid_reserve = 0; cond_resched(); /* * fallocate(2) manpage permits EINTR; we may have been * interrupted because we are using up too much memory. */ if (signal_pending(current)) { error = -EINTR; break; } /* Set numa allocation policy based on index */ hugetlb_set_vma_policy(&pseudo_vma, inode, index); /* addr is the offset within the file (zero based) */ addr = index * hpage_size; /* mutex taken here, fault path and hole punch */ hash = hugetlb_fault_mutex_hash(h, mm, &pseudo_vma, mapping, index, addr); mutex_lock(&hugetlb_fault_mutex_table[hash]); /* See if already present in mapping to avoid alloc/free */ page = find_get_page(mapping, index); if (page) { put_page(page); mutex_unlock(&hugetlb_fault_mutex_table[hash]); hugetlb_drop_vma_policy(&pseudo_vma); continue; } /* Allocate page and add to page cache */ page = alloc_huge_page(&pseudo_vma, addr, avoid_reserve); hugetlb_drop_vma_policy(&pseudo_vma); if (IS_ERR(page)) { mutex_unlock(&hugetlb_fault_mutex_table[hash]); error = PTR_ERR(page); goto out; } clear_huge_page(page, addr, pages_per_huge_page(h)); __SetPageUptodate(page); error = huge_add_to_page_cache(page, mapping, index); if (unlikely(error)) { put_page(page); mutex_unlock(&hugetlb_fault_mutex_table[hash]); goto out; } mutex_unlock(&hugetlb_fault_mutex_table[hash]); /* * page_put due to reference from alloc_huge_page() * unlock_page because locked by add_to_page_cache() */ put_page(page); unlock_page(page); } if (!(mode & FALLOC_FL_KEEP_SIZE) && offset + len > inode->i_size) i_size_write(inode, offset + len); inode->i_ctime = current_time(inode); out: inode_unlock(inode); return error; }

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mike kravetzmike kravetz48897.80%120.00%
deepa dinamanideepa dinamani40.80%120.00%
andrew mortonandrew morton40.80%120.00%
al viroal viro20.40%120.00%
andries brouwerandries brouwer10.20%120.00%
Total499100.00%5100.00%


static int hugetlbfs_setattr(struct dentry *dentry, struct iattr *attr) { struct inode *inode = d_inode(dentry); struct hstate *h = hstate_inode(inode); int error; unsigned int ia_valid = attr->ia_valid; BUG_ON(!inode); error = setattr_prepare(dentry, attr); if (error) return error; if (ia_valid & ATTR_SIZE) { error = -EINVAL; if (attr->ia_size & ~huge_page_mask(h)) return -EINVAL; error = hugetlb_vmtruncate(inode, attr->ia_size); if (error) return error; } setattr_copy(inode, attr); mark_inode_dirty(inode); return 0; }

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mike kravetzmike kravetz12998.47%150.00%
jan karajan kara21.53%150.00%
Total131100.00%2100.00%


static struct inode *hugetlbfs_get_root(struct super_block *sb, struct hugetlbfs_config *config) { struct inode *inode; inode = new_inode(sb); if (inode) { struct hugetlbfs_inode_info *info; inode->i_ino = get_next_ino(); inode->i_mode = S_IFDIR | config->mode; inode->i_uid = config->uid; inode->i_gid = config->gid; inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); info = HUGETLBFS_I(inode); mpol_shared_policy_init(&info->policy, NULL); inode->i_op = &hugetlbfs_dir_inode_operations; inode->i_fop = &simple_dir_operations; /* directory inodes start off with i_nlink == 2 (for "." entry) */ inc_nlink(inode); lockdep_annotate_inode_mutex_key(inode); } return inode; }

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al viroal viro6144.85%112.50%
andrew mortonandrew morton4432.35%337.50%
mike kravetzmike kravetz1511.03%112.50%
christoph hellwigchristoph hellwig75.15%112.50%
aneesh kumaraneesh kumar53.68%112.50%
deepa dinamanideepa dinamani42.94%112.50%
Total136100.00%8100.00%

/* * Hugetlbfs is not reclaimable; therefore its i_mmap_rwsem will never * be taken from reclaim -- unlike regular filesystems. This needs an * annotation because huge_pmd_share() does an allocation under hugetlb's * i_mmap_rwsem. */ static struct lock_class_key hugetlbfs_i_mmap_rwsem_key;
static struct inode *hugetlbfs_get_inode(struct super_block *sb, struct inode *dir, umode_t mode, dev_t dev) { struct inode *inode; struct resv_map *resv_map; resv_map = resv_map_alloc(); if (!resv_map) return NULL; inode = new_inode(sb); if (inode) { struct hugetlbfs_inode_info *info; inode->i_ino = get_next_ino(); inode_init_owner(inode, dir, mode); lockdep_set_class(&inode->i_mapping->i_mmap_rwsem, &hugetlbfs_i_mmap_rwsem_key); inode->i_mapping->a_ops = &hugetlbfs_aops; inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); inode->i_mapping->private_data = resv_map; info = HUGETLBFS_I(inode); /* * The policy is initialized here even if we are creating a * private inode because initialization simply creates an * an empty rb tree and calls rwlock_init(), later when we * call mpol_free_shared_policy() it will just return because * the rb tree will still be empty. */ mpol_shared_policy_init(&info->policy, NULL); switch (mode & S_IFMT) { default: init_special_inode(inode, mode, dev); break; case S_IFREG: inode->i_op = &hugetlbfs_inode_operations; inode->i_fop = &hugetlbfs_file_operations; break; case S_IFDIR: inode->i_op = &hugetlbfs_dir_inode_operations; inode->i_fop = &simple_dir_operations; /* directory inodes start off with i_nlink == 2 (for "." entry) */ inc_nlink(inode); break; case S_IFLNK: inode->i_op = &page_symlink_inode_operations; inode_nohighmem(inode); break; } lockdep_annotate_inode_mutex_key(inode); } else kref_put(&resv_map->refs, resv_map_release); return inode; }

Contributors

PersonTokensPropCommitsCommitProp
andrew mortonandrew morton10945.04%320.00%
al viroal viro6828.10%320.00%
joonsoo kimjoonsoo kim3213.22%16.67%
michal hockomichal hocko114.55%16.67%
kenneth w. chenkenneth w. chen52.07%16.67%
josh boyerjosh boyer52.07%16.67%
deepa dinamanideepa dinamani41.65%16.67%
dave hansendave hansen31.24%16.67%
robin holtrobin holt20.83%16.67%
davidlohr buesodavidlohr bueso20.83%16.67%
nathan zimmernathan zimmer10.41%16.67%
Total242100.00%15100.00%

/* * File creation. Allocate an inode, and we're done.. */
static int hugetlbfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev) { struct inode *inode; int error = -ENOSPC; inode = hugetlbfs_get_inode(dir->i_sb, dir, mode, dev); if (inode) { dir->i_ctime = dir->i_mtime = current_time(dir); d_instantiate(dentry, inode); dget(dentry); /* Extra count - pin the dentry in core */ error = 0; } return error; }

Contributors

PersonTokensPropCommitsCommitProp
andrew mortonandrew morton8091.95%450.00%
deepa dinamanideepa dinamani44.60%112.50%
al viroal viro22.30%225.00%
andries brouwerandries brouwer11.15%112.50%
Total87100.00%8100.00%


static int hugetlbfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) { int retval = hugetlbfs_mknod(dir, dentry, mode | S_IFDIR, 0); if (!retval) inc_nlink(dir); return retval; }

Contributors

PersonTokensPropCommitsCommitProp
andrew mortonandrew morton4491.67%133.33%
dave hansendave hansen36.25%133.33%
al viroal viro12.08%133.33%
Total48100.00%3100.00%


static int hugetlbfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl) { return hugetlbfs_mknod(dir, dentry, mode | S_IFREG, 0); }

Contributors

PersonTokensPropCommitsCommitProp
andrew mortonandrew morton3288.89%125.00%
al viroal viro38.33%250.00%
trond myklebusttrond myklebust12.78%125.00%
Total36100.00%4100.00%


static int hugetlbfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) { struct inode *inode; int error = -ENOSPC; inode = hugetlbfs_get_inode(dir->i_sb, dir, S_IFLNK|S_IRWXUGO, 0); if (inode) { int l = strlen(symname)+1; error = page_symlink(inode, symname, l); if (!error) { d_instantiate(dentry, inode); dget(dentry); } else iput(inode); } dir->i_ctime = dir->i_mtime = current_time(dir); return error; }

Contributors

PersonTokensPropCommitsCommitProp
andrew mortonandrew morton11295.73%360.00%
deepa dinamanideepa dinamani43.42%120.00%
al viroal viro10.85%120.00%
Total117100.00%5100.00%

/* * mark the head page dirty */
static int hugetlbfs_set_page_dirty(struct page *page) { struct page *head = compound_head(page); SetPageDirty(head); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
ken chenken chen1448.28%125.00%
andrew mortonandrew morton1344.83%125.00%
adrian bunkadrian bunk13.45%125.00%
christoph lameterchristoph lameter13.45%125.00%
Total29100.00%4100.00%


static int hugetlbfs_migrate_page(struct address_space *mapping, struct page *newpage, struct page *page, enum migrate_mode mode) { int rc; rc = migrate_huge_page_move_mapping(mapping, newpage, page); if (rc != MIGRATEPAGE_SUCCESS) return rc; migrate_page_copy(newpage, page); return MIGRATEPAGE_SUCCESS; }

Contributors

PersonTokensPropCommitsCommitProp
naoya horiguchinaoya horiguchi5187.93%125.00%
mel gormanmel gorman46.90%250.00%
rafael aquinirafael aquini35.17%125.00%
Total58100.00%4100.00%


static int hugetlbfs_statfs(struct dentry *dentry, struct kstatfs *buf) { struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(dentry->d_sb); struct hstate *h = hstate_inode(d_inode(dentry)); buf->f_type = HUGETLBFS_MAGIC; buf->f_bsize = huge_page_size(h); if (sbinfo) { spin_lock(&sbinfo->stat_lock); /* If no limits set, just report 0 for max/free/used * blocks, like simple_statfs() */ if (sbinfo->spool) { long free_pages; spin_lock(&sbinfo->spool->lock); buf->f_blocks = sbinfo->spool->max_hpages; free_pages = sbinfo->spool->max_hpages - sbinfo->spool->used_hpages; buf->f_bavail = buf->f_bfree = free_pages; spin_unlock(&sbinfo->spool->lock); buf->f_files = sbinfo->max_inodes; buf->f_ffree = sbinfo->free_inodes; } spin_unlock(&sbinfo->stat_lock); } buf->f_namelen = NAME_MAX; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
andrew mortonandrew morton9153.85%333.33%
david gibsondavid gibson4828.40%222.22%
andi kleenandi kleen148.28%111.11%
art haasart haas84.73%111.11%
david howellsdavid howells84.73%222.22%
Total169100.00%9100.00%


static void hugetlbfs_put_super(struct super_block *sb) { struct hugetlbfs_sb_info *sbi = HUGETLBFS_SB(sb); if (sbi) { sb->s_fs_info = NULL; if (sbi->spool) hugepage_put_subpool(sbi->spool); kfree(sbi); } }

Contributors

PersonTokensPropCommitsCommitProp
andrew mortonandrew morton3874.51%150.00%
david gibsondavid gibson1325.49%150.00%
Total51100.00%2100.00%


static inline int hugetlbfs_dec_free_inodes(struct hugetlbfs_sb_info *sbinfo) { if (sbinfo->free_inodes >= 0) { spin_lock(&sbinfo->stat_lock); if (unlikely(!sbinfo->free_inodes)) { spin_unlock(&sbinfo->stat_lock); return 0; } sbinfo->free_inodes--; spin_unlock(&sbinfo->stat_lock); } return 1; }

Contributors

PersonTokensPropCommitsCommitProp
christoph hellwigchristoph hellwig69100.00%1100.00%
Total69100.00%1100.00%


static void hugetlbfs_inc_free_inodes(struct hugetlbfs_sb_info *sbinfo) { if (sbinfo->free_inodes >= 0) { spin_lock(&sbinfo->stat_lock); sbinfo->free_inodes++; spin_unlock(&sbinfo->stat_lock); } }

Contributors

PersonTokensPropCommitsCommitProp
christoph hellwigchristoph hellwig42100.00%1100.00%
Total42100.00%1100.00%

static struct kmem_cache *hugetlbfs_inode_cachep;
static struct inode *hugetlbfs_alloc_inode(struct super_block *sb) { struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(sb); struct hugetlbfs_inode_info *p; if (unlikely(!hugetlbfs_dec_free_inodes(sbinfo))) return NULL; p = kmem_cache_alloc(hugetlbfs_inode_cachep, GFP_KERNEL); if (unlikely(!p)) { hugetlbfs_inc_free_inodes(sbinfo); return NULL; } return &p->vfs_inode; }

Contributors

PersonTokensPropCommitsCommitProp
andrew mortonandrew morton4053.33%133.33%
christoph hellwigchristoph hellwig3445.33%133.33%
christoph lameterchristoph lameter11.33%133.33%
Total75100.00%3100.00%


static void hugetlbfs_i_callback(struct rcu_head *head) { struct inode *inode = container_of(head, struct inode, i_rcu); kmem_cache_free(hugetlbfs_inode_cachep, HUGETLBFS_I(inode)); }

Contributors

PersonTokensPropCommitsCommitProp
nick pigginnick piggin36100.00%1100.00%
Total36100.00%1100.00%


static void hugetlbfs_destroy_inode(struct inode *inode) { hugetlbfs_inc_free_inodes(HUGETLBFS_SB(inode->i_sb)); mpol_free_shared_policy(&HUGETLBFS_I(inode)->policy); call_rcu(&inode->i_rcu, hugetlbfs_i_callback); }

Contributors

PersonTokensPropCommitsCommitProp
andrew mortonandrew morton2661.90%133.33%
christoph hellwigchristoph hellwig1023.81%133.33%
nick pigginnick piggin614.29%133.33%
Total42100.00%3100.00%

static const struct address_space_operations hugetlbfs_aops = { .write_begin = hugetlbfs_write_begin, .write_end = hugetlbfs_write_end, .set_page_dirty = hugetlbfs_set_page_dirty, .migratepage = hugetlbfs_migrate_page, };
static void init_once(void *foo) { struct hugetlbfs_inode_info *ei = (struct hugetlbfs_inode_info *)foo; inode_init_once(&ei->vfs_inode); }

Contributors

PersonTokensPropCommitsCommitProp
christoph hellwigchristoph hellwig2790.00%150.00%
christoph lameterchristoph lameter310.00%150.00%
Total30100.00%2100.00%

const struct file_operations hugetlbfs_file_operations = { .read_iter = hugetlbfs_read_iter, .mmap = hugetlbfs_file_mmap, .fsync = noop_fsync, .get_unmapped_area = hugetlb_get_unmapped_area, .llseek = default_llseek, .fallocate = hugetlbfs_fallocate, }; static const struct inode_operations hugetlbfs_dir_inode_operations = { .create = hugetlbfs_create, .lookup = simple_lookup, .link = simple_link, .unlink = simple_unlink, .symlink = hugetlbfs_symlink, .mkdir = hugetlbfs_mkdir, .rmdir = simple_rmdir, .mknod = hugetlbfs_mknod, .rename = simple_rename, .setattr = hugetlbfs_setattr, }; static const struct inode_operations hugetlbfs_inode_operations = { .setattr = hugetlbfs_setattr, }; static const struct super_operations hugetlbfs_ops = { .alloc_inode = hugetlbfs_alloc_inode, .destroy_inode = hugetlbfs_destroy_inode, .evict_inode = hugetlbfs_evict_inode, .statfs = hugetlbfs_statfs, .put_super = hugetlbfs_put_super, .show_options = generic_show_options, }; enum { NO_SIZE, SIZE_STD, SIZE_PERCENT }; /* * Convert size option passed from command line to number of huge pages * in the pool specified by hstate. Size option could be in bytes * (val_type == SIZE_STD) or percentage of the pool (val_type == SIZE_PERCENT). */
static long long hugetlbfs_size_to_hpages(struct hstate *h, unsigned long long size_opt, int val_type) { if (val_type == NO_SIZE) return -1; if (val_type == SIZE_PERCENT) { size_opt <<= huge_page_shift(h); size_opt *= h->max_huge_pages; do_div(size_opt, 100); } size_opt >>= huge_page_shift(h); return size_opt; }

Contributors

PersonTokensPropCommitsCommitProp
mike kravetzmike kravetz68100.00%1100.00%
Total68100.00%1100.00%


static int hugetlbfs_parse_options(char *options, struct hugetlbfs_config *pconfig) { char *p, *rest; substring_t args[MAX_OPT_ARGS]; int option; unsigned long long max_size_opt = 0, min_size_opt = 0; int max_val_type = NO_SIZE, min_val_type = NO_SIZE; if (!options) return 0; while ((p = strsep(&options, ",")) != NULL) { int token; if (!*p) continue; token = match_token(p, tokens, args); switch (token) { case Opt_uid: if (match_int(&args[0], &option)) goto bad_val; pconfig->uid = make_kuid(current_user_ns(), option); if (!uid_valid(pconfig->uid)) goto bad_val; break; case Opt_gid: if (match_int(&args[0], &option)) goto bad_val; pconfig->gid = make_kgid(current_user_ns(), option); if (!gid_valid(pconfig->gid)) goto bad_val; break; case Opt_mode: if (match_octal(&args[0], &option)) goto bad_val; pconfig->mode = option & 01777U; break; case Opt_size: { /* memparse() will accept a K/M/G without a digit */ if (!isdigit(*args[0].from)) goto bad_val; max_size_opt = memparse(args[0].from, &rest); max_val_type = SIZE_STD; if (*rest == '%') max_val_type = SIZE_PERCENT; break; } case Opt_nr_inodes: /* memparse() will accept a K/M/G without a digit */ if (!isdigit(*args[0].from)) goto bad_val; pconfig->nr_inodes = memparse(args[0].from, &rest); break; case Opt_pagesize: { unsigned long ps; ps = memparse(args[0].from, &rest); pconfig->hstate = size_to_hstate(ps); if (!pconfig->hstate) { pr_err("Unsupported page size %lu MB\n", ps >> 20); return -EINVAL; } break; } case Opt_min_size: { /* memparse() will accept a K/M/G without a digit */ if (!isdigit(*args[0].from)) goto bad_val; min_size_opt = memparse(args[0].from, &rest); min_val_type = SIZE_STD; if (*rest == '%') min_val_type = SIZE_PERCENT; break; } default: pr_err("Bad mount option: \"%s\"\n", p); return -EINVAL; break; } } /* * Use huge page pool size (in hstate) to convert the size * options to number of huge pages. If NO_SIZE, -1 is returned. */ pconfig->max_hpages = hugetlbfs_size_to_hpages(pconfig->hstate, max_size_opt, max_val_type); pconfig->min_hpages = hugetlbfs_size_to_hpages(pconfig->hstate, min_size_opt, min_val_type); /* * If max_size was specified, then min_size must be smaller */ if (max_val_type > NO_SIZE && pconfig->min_hpages > pconfig->max_hpages) { pr_err("minimum size can not be greater than maximum size\n"); return -EINVAL; } return 0; bad_val: pr_err("Bad value '%s' for mount option '%s'\n", args[0].from, p); return -EINVAL; }

Contributors

PersonTokensPropCommitsCommitProp
randy dunlaprandy dunlap14127.06%19.09%
andrew mortonandrew morton13826.49%436.36%
mike kravetzmike kravetz10920.92%19.09%
andi kleenandi kleen8315.93%19.09%
eric w. biedermaneric w. biederman387.29%19.09%
lee schermerhornlee schermerhorn91.73%19.09%
akinobu mitaakinobu mita20.38%19.09%
ken chenken chen10.19%19.09%
Total521100.00%11100.00%


static int hugetlbfs_fill_super(struct super_block *sb, void *data, int silent) { int ret; struct hugetlbfs_config config; struct hugetlbfs_sb_info *sbinfo; save_mount_options(sb, data); config.max_hpages = -1; /* No limit on size by default */ config.nr_inodes = -1; /* No limit on number of inodes by default */ config.uid = current_fsuid(); config.gid = current_fsgid(); config.mode = 0755; config.hstate = &default_hstate; config.min_hpages = -1; /* No default minimum size */ ret = hugetlbfs_parse_options(data, &config); if (ret) return ret; sbinfo = kmalloc(sizeof(struct hugetlbfs_sb_info), GFP_KERNEL); if (!sbinfo) return -ENOMEM; sb->s_fs_info = sbinfo; sbinfo->hstate = config.hstate; spin_lock_init(&sbinfo->stat_lock); sbinfo->max_inodes = config.nr_inodes; sbinfo->free_inodes = config.nr_inodes; sbinfo->spool = NULL; /* * Allocate and initialize subpool if maximum or minimum size is * specified. Any needed reservations (for minimim size) are taken * taken when the subpool is created. */ if (config.max_hpages != -1 || config.min_hpages != -1) { sbinfo->spool = hugepage_new_subpool(config.hstate, config.max_hpages, config.min_hpages); if (!sbinfo->spool) goto out_free; } sb->s_maxbytes = MAX_LFS_FILESIZE; sb->s_blocksize = huge_page_size(config.hstate); sb->s_blocksize_bits = huge_page_shift(config.hstate); sb->s_magic = HUGETLBFS_MAGIC; sb->s_op = &hugetlbfs_ops; sb->s_time_gran = 1; sb->s_root = d_make_root(hugetlbfs_get_root(sb, &config)); if (!sb->s_root) goto out_free; return 0; out_free: kfree(sbinfo->spool); kfree(sbinfo); return -ENOMEM; }

Contributors

PersonTokensPropCommitsCommitProp
andrew mortonandrew morton19161.22%535.71%
david gibsondavid gibson3410.90%17.14%
andi kleenandi kleen3310.58%214.29%
mike kravetzmike kravetz278.65%17.14%
al viroal viro103.21%214.29%
miklos szeredimiklos szeredi72.24%17.14%
william lee irwin iiiwilliam lee irwin iii61.92%17.14%
david howellsdavid howells41.28%17.14%
Total312100.00%14100.00%


static struct dentry *hugetlbfs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { return mount_nodev(fs_type, flags, data, hugetlbfs_fill_super); }

Contributors

PersonTokensPropCommitsCommitProp
andrew mortonandrew morton3183.78%133.33%
al viroal viro513.51%133.33%
andries brouwerandries brouwer12.70%133.33%
Total37100.00%3100.00%

static struct file_system_type hugetlbfs_fs_type = { .name = "hugetlbfs", .mount = hugetlbfs_mount, .kill_sb = kill_litter_super, }; static struct vfsmount *hugetlbfs_vfsmount[HUGE_MAX_HSTATE];
static int can_do_hugetlb_shm(void) { kgid_t shm_group; shm_group = make_kgid(&init_user_ns, sysctl_hugetlb_shm_group); return capable(CAP_IPC_LOCK) || in_group_p(shm_group); }

Contributors

PersonTokensPropCommitsCommitProp
andrew mortonandrew morton1650.00%133.33%
eric w. biedermaneric w. biederman1443.75%133.33%
mel gormanmel gorman26.25%133.33%
Total32100.00%3100.00%


static int get_hstate_idx(int page_size_log) { struct hstate *h = hstate_sizelog(page_size_log); if (!h) return -1; return h - hstates; }

Contributors

PersonTokensPropCommitsCommitProp
andi kleenandi kleen3090.91%150.00%
naoya horiguchinaoya horiguchi39.09%150.00%
Total33100.00%2100.00%

static const struct dentry_operations anon_ops = { .d_dname = simple_dname }; /* * Note that size should be aligned to proper hugepage size in caller side, * otherwise hugetlb_reserve_pages reserves one less hugepages than intended. */
struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag, struct user_struct **user, int creat_flags, int page_size_log) { struct file *file = ERR_PTR(-ENOMEM); struct inode *inode; struct path path; struct super_block *sb; struct qstr quick_string; int hstate_idx; hstate_idx = get_hstate_idx(page_size_log); if (hstate_idx < 0) return ERR_PTR(-ENODEV); *user = NULL; if (!hugetlbfs_vfsmount[hstate_idx]) return ERR_PTR(-ENOENT); if (creat_flags == HUGETLB_SHMFS_INODE && !can_do_hugetlb_shm()) { *user = current_user(); if (user_shm_lock(size, *user)) { task_lock(current); pr_warn_once("%s (%d): Using mlock ulimits for SHM_HUGETLB is deprecated\n", current->comm, current->pid); task_unlock(current); } else { *user = NULL; return ERR_PTR(-EPERM); } } sb = hugetlbfs_vfsmount[hstate_idx]->mnt_sb; quick_string.name = name; quick_string.len = strlen(quick_string.name); quick_string.hash = 0; path.dentry = d_alloc_pseudo(sb, &quick_string); if (!path.dentry) goto out_shm_unlock; d_set_d_op(path.dentry, &anon_ops); path.mnt = mntget(hugetlbfs_vfsmount[hstate_idx]); file = ERR_PTR(-ENOSPC); inode = hugetlbfs_get_inode(sb, NULL, S_IFREG | S_IRWXUGO, 0); if (!inode) goto out_dentry; if (creat_flags == HUGETLB_SHMFS_INODE) inode->i_flags |= S_PRIVATE; file = ERR_PTR(-ENOMEM); if (hugetlb_reserve_pages(inode, 0, size >> huge_page_shift(hstate_inode(inode)), NULL, acctflag)) goto out_inode; d_instantiate(path.dentry, inode); inode->i_size = size; clear_nlink(inode); file = alloc_file(&path, FMODE_WRITE | FMODE_READ, &hugetlbfs_file_operations); if (IS_ERR(file)) goto out_dentry; /* inode is already attached */ return file; out_inode: iput(inode); out_dentry: path_put(&path); out_shm_unlock: if (*user) { user_shm_unlock(size, *user); *user = NULL; } return file; }

Contributors

PersonTokensPropCommitsCommitProp
andrew mortonandrew morton13332.28%414.29%
al viroal viro4410.68%414.29%
andi kleenandi kleen358.50%13.57%
hugh dickinshugh dickins348.25%13.57%
ravikiran g thirumalairavikiran g thirumalai276.55%13.57%
david gibsondavid gibson215.10%13.57%
david rientjesdavid rientjes194.61%13.57%
anatol pomozovanatol pomozov184.37%13.57%
dave hansendave hansen143.40%13.57%
akinobu mitaakinobu mita122.91%13.57%
stephen d. smalleystephen d. smalley122.91%13.57%
mel gormanmel gorman112.67%310.71%
naoya horiguchinaoya horiguchi92.18%13.57%
eric w. biedermaneric w. biederman71.70%13.57%
rik van rielrik van riel51.21%13.57%
eric b munsoneric b munson30.73%13.57%
miklos szeredimiklos szeredi30.73%13.57%
kenneth w. chenkenneth w. chen30.73%13.57%
kosaki motohirokosaki motohiro10.24%13.57%
david howellsdavid howells10.24%13.57%
Total412100.00%28100.00%


static int __init init_hugetlbfs_fs(void) { struct hstate *h; int error; int i; if (!hugepages_supported()) { pr_info("disabling because there are no supported hugepage sizes\n"); return -ENOTSUPP; } error = -ENOMEM; hugetlbfs_inode_cachep = kmem_cache_create("hugetlbfs_inode_cache", sizeof(struct hugetlbfs_inode_info), 0, SLAB_ACCOUNT, init_once); if (hugetlbfs_inode_cachep == NULL) goto out2; error = register_filesystem(&hugetlbfs_fs_type); if (error) goto out; i = 0; for_each_hstate(h) { char buf[50]; unsigned ps_kb = 1U << (h->order + PAGE_SHIFT - 10); snprintf(buf, sizeof(buf), "pagesize=%uK", ps_kb); hugetlbfs_vfsmount[i] = kern_mount_data(&hugetlbfs_fs_type, buf); if (IS_ERR(hugetlbfs_vfsmount[i])) { pr_err("Cannot mount internal hugetlbfs for " "page size %uK", ps_kb); error = PTR_ERR(hugetlbfs_vfsmount[i]); hugetlbfs_vfsmount[i] = NULL; } i++; } /* Non default hstates are optional */ if (!IS_ERR_OR_NULL(hugetlbfs_vfsmount[default_hstate_idx])) return 0; out: kmem_cache_destroy(hugetlbfs_inode_cachep); out2: return error; }

Contributors

PersonTokensPropCommitsCommitProp
andi kleenandi kleen9947.14%112.50%
andrew mortonandrew morton8440.00%337.50%
nishanth aravamudannishanth aravamudan167.62%112.50%
peter zijlstrapeter zijlstra73.33%112.50%
hillf dantonhillf danton31.43%112.50%
vladimir davydovvladimir davydov10.48%112.50%
Total210100.00%8100.00%

fs_initcall(init_hugetlbfs_fs)

Overall Contributors

PersonTokensPropCommitsCommitProp
andrew mortonandrew morton197833.24%1710.97%
mike kravetzmike kravetz142824.00%63.87%
andi kleenandi kleen4277.18%42.58%
al viroal viro3155.29%1811.61%
badari pulavartybadari pulavarty2824.74%10.65%
david gibsondavid gibson2143.60%53.23%
randy dunlaprandy dunlap2103.53%21.29%
christoph hellwigchristoph hellwig2043.43%63.87%
nick pigginnick piggin851.43%21.29%
naoya horiguchinaoya horiguchi721.21%21.29%
joonsoo kimjoonsoo kim631.06%10.65%
eric w. biedermaneric w. biederman611.03%21.29%
adam litkeadam litke470.79%21.29%
hugh dickinshugh dickins460.77%42.58%
aneesh kumaraneesh kumar400.67%21.29%
michel lespinassemichel lespinasse360.61%21.29%
kenneth w. chenkenneth w. chen280.47%10.65%
ravikiran g thirumalairavikiran g thirumalai270.45%10.65%
benjamin herrenschmidtbenjamin herrenschmidt270.45%10.65%
mel gormanmel gorman230.39%53.23%
deepa dinamanideepa dinamani200.34%10.65%
dave hansendave hansen200.34%21.29%
ken chenken chen200.34%31.94%
david rientjesdavid rientjes190.32%10.65%
art haasart haas180.30%10.65%
anatol pomozovanatol pomozov180.30%10.65%
nishanth aravamudannishanth aravamudan160.27%10.65%
miklos szeredimiklos szeredi150.25%21.29%
michal hockomichal hocko140.24%10.65%
akinobu mitaakinobu mita140.24%21.29%
david howellsdavid howells130.22%42.58%
stephen d. smalleystephen d. smalley120.20%10.65%
lee schermerhornlee schermerhorn90.15%10.65%
oleg nesterovoleg nesterov80.13%10.65%
yanmin zhangyanmin zhang70.12%21.29%
peter zijlstrapeter zijlstra70.12%10.65%
xiao guangrongxiao guangrong70.12%10.65%
christoph lameterchristoph lameter70.12%42.58%
william lee irwin iiiwilliam lee irwin iii60.10%10.65%
arjan van de venarjan van de ven60.10%21.29%
kirill a. shutemovkirill a. shutemov60.10%31.94%
davidlohr buesodavidlohr bueso50.08%21.29%
josh boyerjosh boyer50.08%10.65%
arnd bergmannarnd bergmann50.08%10.65%
adrian bunkadrian bunk50.08%21.29%
rik van rielrik van riel50.08%10.65%
zhong jiangzhong jiang40.07%10.65%
andries brouwerandries brouwer30.05%21.29%
rafael aquinirafael aquini30.05%10.65%
jan karajan kara30.05%21.29%
wolfgang wanderwolfgang wander30.05%10.65%
eric b munsoneric b munson30.05%10.65%
arnaldo carvalho de meloarnaldo carvalho de melo30.05%10.65%
hillf dantonhillf danton30.05%10.65%
nick blacknick black30.05%10.65%
fabian frederickfabian frederick20.03%21.29%
josef 'jeff' sipekjosef 'jeff' sipek20.03%10.65%
greg kroah-hartmangreg kroah-hartman20.03%10.65%
paul gortmakerpaul gortmaker20.03%10.65%
konstantin khlebnikovkonstantin khlebnikov20.03%21.29%
roel kluinroel kluin20.03%10.65%
robin holtrobin holt20.03%10.65%
trond myklebusttrond myklebust10.02%10.65%
minchan kimminchan kim10.02%10.65%
linus torvaldslinus torvalds10.02%10.65%
steven whitehousesteven whitehouse10.02%10.65%
kosaki motohirokosaki motohiro10.02%10.65%
nathan zimmernathan zimmer10.02%10.65%
becky brucebecky bruce10.02%10.65%
vladimir davydovvladimir davydov10.02%10.65%
Total5950100.00%155100.00%
Directory: fs/hugetlbfs
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