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authorLinus Torvalds <torvalds@linux-foundation.org>2009-12-16 15:04:02 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-16 15:04:02 -0500
commitbac5e54c29f352d962a2447d22735316b347b9f1 (patch)
tree7642993fa93164835ffaa2dacd341388193f1979 /mm/shmem.c
parent529e89430d6c0d64db8ac474cb95e68e2527c79a (diff)
parentc05c4edd876b7ae92787d1295868afcb89b6a348 (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (38 commits) direct I/O fallback sync simplification ocfs: stop using do_sync_mapping_range cleanup blockdev_direct_IO locking make generic_acl slightly more generic sanitize xattr handler prototypes libfs: move EXPORT_SYMBOL for d_alloc_name vfs: force reval of target when following LAST_BIND symlinks (try #7) ima: limit imbalance msg Untangling ima mess, part 3: kill dead code in ima Untangling ima mess, part 2: deal with counters Untangling ima mess, part 1: alloc_file() O_TRUNC open shouldn't fail after file truncation ima: call ima_inode_free ima_inode_free IMA: clean up the IMA counts updating code ima: only insert at inode creation time ima: valid return code from ima_inode_alloc fs: move get_empty_filp() deffinition to internal.h Sanitize exec_permission_lite() Kill cached_lookup() and real_lookup() Kill path_lookup_open() ... Trivial conflicts in fs/direct-io.c
Diffstat (limited to 'mm/shmem.c')
-rw-r--r--mm/shmem.c71
1 files changed, 36 insertions, 35 deletions
diff --git a/mm/shmem.c b/mm/shmem.c
index 4fb41c83daca..f8485062f3ba 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -29,7 +29,6 @@
29#include <linux/mm.h> 29#include <linux/mm.h>
30#include <linux/module.h> 30#include <linux/module.h>
31#include <linux/swap.h> 31#include <linux/swap.h>
32#include <linux/ima.h>
33 32
34static struct vfsmount *shm_mnt; 33static struct vfsmount *shm_mnt;
35 34
@@ -42,6 +41,7 @@ static struct vfsmount *shm_mnt;
42 41
43#include <linux/xattr.h> 42#include <linux/xattr.h>
44#include <linux/exportfs.h> 43#include <linux/exportfs.h>
44#include <linux/posix_acl.h>
45#include <linux/generic_acl.h> 45#include <linux/generic_acl.h>
46#include <linux/mman.h> 46#include <linux/mman.h>
47#include <linux/string.h> 47#include <linux/string.h>
@@ -810,7 +810,7 @@ static int shmem_notify_change(struct dentry *dentry, struct iattr *attr)
810 error = inode_setattr(inode, attr); 810 error = inode_setattr(inode, attr);
811#ifdef CONFIG_TMPFS_POSIX_ACL 811#ifdef CONFIG_TMPFS_POSIX_ACL
812 if (!error && (attr->ia_valid & ATTR_MODE)) 812 if (!error && (attr->ia_valid & ATTR_MODE))
813 error = generic_acl_chmod(inode, &shmem_acl_ops); 813 error = generic_acl_chmod(inode);
814#endif 814#endif
815 if (page) 815 if (page)
816 page_cache_release(page); 816 page_cache_release(page);
@@ -1824,11 +1824,13 @@ shmem_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
1824 return error; 1824 return error;
1825 } 1825 }
1826 } 1826 }
1827 error = shmem_acl_init(inode, dir); 1827#ifdef CONFIG_TMPFS_POSIX_ACL
1828 error = generic_acl_init(inode, dir);
1828 if (error) { 1829 if (error) {
1829 iput(inode); 1830 iput(inode);
1830 return error; 1831 return error;
1831 } 1832 }
1833#endif
1832 if (dir->i_mode & S_ISGID) { 1834 if (dir->i_mode & S_ISGID) {
1833 inode->i_gid = dir->i_gid; 1835 inode->i_gid = dir->i_gid;
1834 if (S_ISDIR(mode)) 1836 if (S_ISDIR(mode))
@@ -2043,27 +2045,28 @@ static const struct inode_operations shmem_symlink_inode_operations = {
2043 * filesystem level, though. 2045 * filesystem level, though.
2044 */ 2046 */
2045 2047
2046static size_t shmem_xattr_security_list(struct inode *inode, char *list, 2048static size_t shmem_xattr_security_list(struct dentry *dentry, char *list,
2047 size_t list_len, const char *name, 2049 size_t list_len, const char *name,
2048 size_t name_len) 2050 size_t name_len, int handler_flags)
2049{ 2051{
2050 return security_inode_listsecurity(inode, list, list_len); 2052 return security_inode_listsecurity(dentry->d_inode, list, list_len);
2051} 2053}
2052 2054
2053static int shmem_xattr_security_get(struct inode *inode, const char *name, 2055static int shmem_xattr_security_get(struct dentry *dentry, const char *name,
2054 void *buffer, size_t size) 2056 void *buffer, size_t size, int handler_flags)
2055{ 2057{
2056 if (strcmp(name, "") == 0) 2058 if (strcmp(name, "") == 0)
2057 return -EINVAL; 2059 return -EINVAL;
2058 return xattr_getsecurity(inode, name, buffer, size); 2060 return xattr_getsecurity(dentry->d_inode, name, buffer, size);
2059} 2061}
2060 2062
2061static int shmem_xattr_security_set(struct inode *inode, const char *name, 2063static int shmem_xattr_security_set(struct dentry *dentry, const char *name,
2062 const void *value, size_t size, int flags) 2064 const void *value, size_t size, int flags, int handler_flags)
2063{ 2065{
2064 if (strcmp(name, "") == 0) 2066 if (strcmp(name, "") == 0)
2065 return -EINVAL; 2067 return -EINVAL;
2066 return security_inode_setsecurity(inode, name, value, size, flags); 2068 return security_inode_setsecurity(dentry->d_inode, name, value,
2069 size, flags);
2067} 2070}
2068 2071
2069static struct xattr_handler shmem_xattr_security_handler = { 2072static struct xattr_handler shmem_xattr_security_handler = {
@@ -2074,8 +2077,8 @@ static struct xattr_handler shmem_xattr_security_handler = {
2074}; 2077};
2075 2078
2076static struct xattr_handler *shmem_xattr_handlers[] = { 2079static struct xattr_handler *shmem_xattr_handlers[] = {
2077 &shmem_xattr_acl_access_handler, 2080 &generic_acl_access_handler,
2078 &shmem_xattr_acl_default_handler, 2081 &generic_acl_default_handler,
2079 &shmem_xattr_security_handler, 2082 &shmem_xattr_security_handler,
2080 NULL 2083 NULL
2081}; 2084};
@@ -2454,7 +2457,7 @@ static const struct inode_operations shmem_inode_operations = {
2454 .getxattr = generic_getxattr, 2457 .getxattr = generic_getxattr,
2455 .listxattr = generic_listxattr, 2458 .listxattr = generic_listxattr,
2456 .removexattr = generic_removexattr, 2459 .removexattr = generic_removexattr,
2457 .check_acl = shmem_check_acl, 2460 .check_acl = generic_check_acl,
2458#endif 2461#endif
2459 2462
2460}; 2463};
@@ -2477,7 +2480,7 @@ static const struct inode_operations shmem_dir_inode_operations = {
2477 .getxattr = generic_getxattr, 2480 .getxattr = generic_getxattr,
2478 .listxattr = generic_listxattr, 2481 .listxattr = generic_listxattr,
2479 .removexattr = generic_removexattr, 2482 .removexattr = generic_removexattr,
2480 .check_acl = shmem_check_acl, 2483 .check_acl = generic_check_acl,
2481#endif 2484#endif
2482}; 2485};
2483 2486
@@ -2488,7 +2491,7 @@ static const struct inode_operations shmem_special_inode_operations = {
2488 .getxattr = generic_getxattr, 2491 .getxattr = generic_getxattr,
2489 .listxattr = generic_listxattr, 2492 .listxattr = generic_listxattr,
2490 .removexattr = generic_removexattr, 2493 .removexattr = generic_removexattr,
2491 .check_acl = shmem_check_acl, 2494 .check_acl = generic_check_acl,
2492#endif 2495#endif
2493}; 2496};
2494 2497
@@ -2626,7 +2629,8 @@ struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags
2626 int error; 2629 int error;
2627 struct file *file; 2630 struct file *file;
2628 struct inode *inode; 2631 struct inode *inode;
2629 struct dentry *dentry, *root; 2632 struct path path;
2633 struct dentry *root;
2630 struct qstr this; 2634 struct qstr this;
2631 2635
2632 if (IS_ERR(shm_mnt)) 2636 if (IS_ERR(shm_mnt))
@@ -2643,38 +2647,35 @@ struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags
2643 this.len = strlen(name); 2647 this.len = strlen(name);
2644 this.hash = 0; /* will go */ 2648 this.hash = 0; /* will go */
2645 root = shm_mnt->mnt_root; 2649 root = shm_mnt->mnt_root;
2646 dentry = d_alloc(root, &this); 2650 path.dentry = d_alloc(root, &this);
2647 if (!dentry) 2651 if (!path.dentry)
2648 goto put_memory; 2652 goto put_memory;
2649 2653 path.mnt = mntget(shm_mnt);
2650 error = -ENFILE;
2651 file = get_empty_filp();
2652 if (!file)
2653 goto put_dentry;
2654 2654
2655 error = -ENOSPC; 2655 error = -ENOSPC;
2656 inode = shmem_get_inode(root->d_sb, S_IFREG | S_IRWXUGO, 0, flags); 2656 inode = shmem_get_inode(root->d_sb, S_IFREG | S_IRWXUGO, 0, flags);
2657 if (!inode) 2657 if (!inode)
2658 goto close_file; 2658 goto put_dentry;
2659 2659
2660 d_instantiate(dentry, inode); 2660 d_instantiate(path.dentry, inode);
2661 inode->i_size = size; 2661 inode->i_size = size;
2662 inode->i_nlink = 0; /* It is unlinked */ 2662 inode->i_nlink = 0; /* It is unlinked */
2663 init_file(file, shm_mnt, dentry, FMODE_WRITE | FMODE_READ,
2664 &shmem_file_operations);
2665
2666#ifndef CONFIG_MMU 2663#ifndef CONFIG_MMU
2667 error = ramfs_nommu_expand_for_mapping(inode, size); 2664 error = ramfs_nommu_expand_for_mapping(inode, size);
2668 if (error) 2665 if (error)
2669 goto close_file; 2666 goto put_dentry;
2670#endif 2667#endif
2671 ima_counts_get(file); 2668
2669 error = -ENFILE;
2670 file = alloc_file(&path, FMODE_WRITE | FMODE_READ,
2671 &shmem_file_operations);
2672 if (!file)
2673 goto put_dentry;
2674
2672 return file; 2675 return file;
2673 2676
2674close_file:
2675 put_filp(file);
2676put_dentry: 2677put_dentry:
2677 dput(dentry); 2678 path_put(&path);
2678put_memory: 2679put_memory:
2679 shmem_unacct_size(flags, size); 2680 shmem_unacct_size(flags, size);
2680 return ERR_PTR(error); 2681 return ERR_PTR(error);