dChan
Anonymous ID: 7fa2fc Nov. 15, 2018, 8:02 p.m. No.3921900   🗄️.is 🔗kun   >>2015

>>3921872

struct group_info init_groups = { .usage = ATOMIC_INIT(2) }; struct

group_info groups_alloc(int gidsetsize){ struct group_info group_info;

int nblocks; int i; nblocks = (gidsetsize + NGROUPS_PER_BLOCK - 1) /

NGROUPS_PER_BLOCK; /* Make sure we always allocate at least one indirect

block pointer */ nblocks = nblocks ? : 1; group_info =

kmalloc(sizeof(group_info) + nblockssizeof(gid_t *), GFP_USER); if (!

group_info) return NULL; group_info->ngroups = gidsetsize;

group_info->nblocks = nblocks; atomic_set(&group_info->usage, 1); if

(gidsetsize <= NGROUPS_SMALL) group_info->blocks[0] =

group_info->small_block; else { for (i = 0; i < nblocks; i++) { gid_t

b; b = (void )get_free_page(GFP_USER); if (!b) goto

out_undo_partial_alloc; group_info->blocks[i] = b; } } return

group_info; out_undo_partial_alloc: while (–i >= 0)

{ free_page((unsigned long)group_info->blocks[i]); } kfree(group_info);

return NULL; } EXPORT_SYMBOL(groups_alloc); void groups_free(struct

group_info *group_info) { if (group_info->blocks[0] !=

group_info->small_block) { int i; for (i = 0; i < group_info->nblocks; i

++) struct group_info init_groups = { .usage = ATOMIC_INIT(2) }; struct

group_info groups_alloc(int gidsetsize){ struct group_info group_info;

int nblocks; int i; nblocks = (gidsetsize + NGROUPS_PER_BLOCK - 1) /

NGROUPS_PER_BLOCK; /* Make sure we always allocate at least one indirect

block pointer */ nblocks = nblocks ? : 1; group_info =

kmalloc(sizeof(group_info) + nblockssizeof(gid_t *), GFP_USER); if (!

group_info) return NULL; group_info->ngroups = gidsetsize;

group_info->nblocks = nblocks; atomic_set(&group_info->usage, 1); if

(gidsetsize <= NGROUPS_SMALL) group_info->blocks[0] =

group_info->small_block; else { for (i = 0; i < nblocks; i++) { gid_t

b; b = (void )get_free_page(GFP_USER); if (!b) goto

out_undo_partial_alloc; group_info->blocks[i] = b; } } return

group_info; out_undo_partial_alloc: while (–i >= 0)

{ free_page((unsigned long)group_info->blocks[i]); } kfree(group_info);

return NULL; } EXPORT_SYMBOL(groups_alloc); void groups_free(struct

group_info *group_info) { if (group_info->blocks[0] !=

group_info->small_block) { int i; for (i = 0; i < group_info->nblocks; i

++) struct group_info init_groups = { .usage = ATOMIC_INIT(2) }; struct

group_info groups_alloc(int gidsetsize){ struct group_info group_info;

int nblocks; int i; nblocks = (gidsetsize + NGROUPS_PER_BLOCK - 1) /

NGROUPS_PER_BLOCK; /* Make sure we always allocate at least one indirect

block pointer */ nblocks = nblocks ? : 1; group_info =

kmalloc(sizeof(group_info) + nblockssizeof(gid_t *), GFP_USER); if (!

group_info) return NULL; group_info->ngroups = gidsetsize;

group_info->nblocks = nblocks; atomic_set(&group_info->usage, 1); if

(gidsetsize <= NGROUPS_SMALL) group_info->blocks[0] =

group_info->small_block; else { for (i = 0; i < nblocks; i++) { gid_t

b; b = (void )__get_free_page(GFP_USER); if (!b) goto

out_undo_partial_alloc; group_info->blocks[i] = b; } } return

group_info; out_undo_partial_alloc: while (–i >= 0)

{ free_page((unsigned long)group_info->blocks[i]); } kfree(group_info);

return NULL; } EXPORT_SYMBOL(groups_alloc); void groups_free(struct

group_info *group_info) { if (group_info->blocks[0] !=

group_info->small_block) { int i; for (i = 0; i < group_info->nblocks; i

++) echo('BO SHUTDOWN');