| /* |
| * fs/sdcardfs/sdcardfs.h |
| * |
| * The sdcardfs v2.0 |
| * This file system replaces the sdcard daemon on Android |
| * On version 2.0, some of the daemon functions have been ported |
| * to support the multi-user concepts of Android 4.4 |
| * |
| * Copyright (c) 2013 Samsung Electronics Co. Ltd |
| * Authors: Daeho Jeong, Woojoong Lee, Seunghwan Hyun, |
| * Sunghwan Yun, Sungjong Seo |
| * |
| * This program has been developed as a stackable file system based on |
| * the WrapFS which written by |
| * |
| * Copyright (c) 1998-2011 Erez Zadok |
| * Copyright (c) 2009 Shrikar Archak |
| * Copyright (c) 2003-2011 Stony Brook University |
| * Copyright (c) 2003-2011 The Research Foundation of SUNY |
| * |
| * This file is dual licensed. It may be redistributed and/or modified |
| * under the terms of the Apache 2.0 License OR version 2 of the GNU |
| * General Public License. |
| */ |
| |
| #ifndef _SDCARDFS_H_ |
| #define _SDCARDFS_H_ |
| |
| #include <linux/dcache.h> |
| #include <linux/file.h> |
| #include <linux/fs.h> |
| #include <linux/aio.h> |
| #include <linux/kref.h> |
| #include <linux/mm.h> |
| #include <linux/mount.h> |
| #include <linux/namei.h> |
| #include <linux/seq_file.h> |
| #include <linux/statfs.h> |
| #include <linux/fs_stack.h> |
| #include <linux/magic.h> |
| #include <linux/uaccess.h> |
| #include <linux/slab.h> |
| #include <linux/sched.h> |
| #include <linux/types.h> |
| #include <linux/security.h> |
| #include <linux/string.h> |
| #include <linux/list.h> |
| #include <linux/ratelimit.h> |
| #include "multiuser.h" |
| |
| /* the file system name */ |
| #define SDCARDFS_NAME "sdcardfs" |
| |
| /* sdcardfs root inode number */ |
| #define SDCARDFS_ROOT_INO 1 |
| |
| /* useful for tracking code reachability */ |
| #define UDBG pr_default("DBG:%s:%s:%d\n", __FILE__, __func__, __LINE__) |
| |
| #define SDCARDFS_DIRENT_SIZE 256 |
| |
| /* temporary static uid settings for development */ |
| #define AID_ROOT 0 /* uid for accessing /mnt/sdcard & extSdcard */ |
| #define AID_MEDIA_RW 1023 /* internal media storage write access */ |
| |
| #define AID_SDCARD_RW 1015 /* external storage write access */ |
| #define AID_SDCARD_R 1028 /* external storage read access */ |
| #define AID_SDCARD_PICS 1033 /* external storage photos access */ |
| #define AID_SDCARD_AV 1034 /* external storage audio/video access */ |
| #define AID_SDCARD_ALL 1035 /* access all users external storage */ |
| #define AID_MEDIA_OBB 1059 /* obb files */ |
| |
| #define AID_SDCARD_IMAGE 1057 |
| |
| #define AID_PACKAGE_INFO 1027 |
| |
| |
| /* |
| * Permissions are handled by our permission function. |
| * We don't want anyone who happens to look at our inode value to prematurely |
| * block access, so store more permissive values. These are probably never |
| * used. |
| */ |
| #define fixup_tmp_permissions(x) \ |
| do { \ |
| (x)->i_uid = make_kuid(&init_user_ns, \ |
| SDCARDFS_I(x)->data->d_uid); \ |
| (x)->i_gid = make_kgid(&init_user_ns, AID_SDCARD_RW); \ |
| (x)->i_mode = ((x)->i_mode & S_IFMT) | 0775;\ |
| } while (0) |
| |
| /* Android 5.0 support */ |
| |
| /* Permission mode for a specific node. Controls how file permissions |
| * are derived for children nodes. |
| */ |
| typedef enum { |
| /* Nothing special; this node should just inherit from its parent. */ |
| PERM_INHERIT, |
| /* This node is one level above a normal root; used for legacy layouts |
| * which use the first level to represent user_id. |
| */ |
| PERM_PRE_ROOT, |
| /* This node is "/" */ |
| PERM_ROOT, |
| /* This node is "/Android" */ |
| PERM_ANDROID, |
| /* This node is "/Android/data" */ |
| PERM_ANDROID_DATA, |
| /* This node is "/Android/obb" */ |
| PERM_ANDROID_OBB, |
| /* This node is "/Android/media" */ |
| PERM_ANDROID_MEDIA, |
| /* This node is "/Android/[data|media|obb]/[package]" */ |
| PERM_ANDROID_PACKAGE, |
| /* This node is "/Android/[data|media|obb]/[package]/cache" */ |
| PERM_ANDROID_PACKAGE_CACHE, |
| /* |
| * The knox directory has different uses depending on whether it's |
| * used for external storage or secondary storage. |
| * |
| * 1. external storage |
| * It's used for Andorid For Work(AFW) to provide SDP feature. |
| * /mnt/shell/enc_emulated/10 will be bind mounted on it. |
| * |
| * 2. Secondary storage(external SD Card) |
| * Knox doesn't encrypt files in secondary storage. Instead, |
| * it restricts access to Knox files by DAC. |
| */ |
| /* This node is /knox */ |
| PERM_KNOX_PRE_ROOT, |
| /* This node is /knox/[userid] */ |
| PERM_KNOX_ROOT, |
| /* This node is /knox/[userid]/Android */ |
| PERM_KNOX_ANDROID, |
| /* This node is /knox/[userid]/Android/[data|shared] */ |
| PERM_KNOX_ANDROID_DATA, |
| PERM_KNOX_ANDROID_SHARED, |
| /* This node is /knox/[userid]/Android/[data|shared]/[package] */ |
| PERM_KNOX_ANDROID_PACKAGE, |
| |
| } perm_t; |
| |
| struct sdcardfs_sb_info; |
| struct sdcardfs_mount_options; |
| struct sdcardfs_inode_info; |
| struct sdcardfs_inode_data; |
| |
| /* Do not directly use this function. Use OVERRIDE_CRED() instead. */ |
| const struct cred *override_fsids(struct sdcardfs_sb_info *sbi, |
| struct sdcardfs_inode_data *data); |
| /* Do not directly use this function, use REVERT_CRED() instead. */ |
| void revert_fsids(const struct cred *old_cred); |
| |
| /* operations vectors defined in specific files */ |
| extern const struct file_operations sdcardfs_main_fops; |
| extern const struct file_operations sdcardfs_dir_fops; |
| extern const struct inode_operations sdcardfs_main_iops; |
| extern const struct inode_operations sdcardfs_dir_iops; |
| extern const struct inode_operations sdcardfs_symlink_iops; |
| extern const struct super_operations sdcardfs_sops; |
| extern const struct dentry_operations sdcardfs_ci_dops; |
| extern const struct address_space_operations sdcardfs_aops, sdcardfs_dummy_aops; |
| extern const struct vm_operations_struct sdcardfs_vm_ops; |
| |
| extern int sdcardfs_init_inode_cache(void); |
| extern void sdcardfs_destroy_inode_cache(void); |
| extern int sdcardfs_init_dentry_cache(void); |
| extern void sdcardfs_destroy_dentry_cache(void); |
| extern int new_dentry_private_data(struct dentry *dentry); |
| extern void free_dentry_private_data(struct dentry *dentry); |
| extern struct dentry *sdcardfs_lookup(struct inode *dir, struct dentry *dentry, |
| unsigned int flags); |
| extern struct inode *sdcardfs_iget(struct super_block *sb, |
| struct inode *lower_inode, userid_t id); |
| extern int sdcardfs_interpose(struct dentry *dentry, struct super_block *sb, |
| struct path *lower_path, userid_t id); |
| |
| /* file private data */ |
| struct sdcardfs_file_info { |
| struct file *lower_file; |
| const struct vm_operations_struct *lower_vm_ops; |
| }; |
| |
| struct sdcardfs_inode_data { |
| struct kref refcount; |
| bool abandoned; |
| |
| perm_t perm; |
| userid_t userid; |
| uid_t d_uid; |
| bool under_android; |
| bool under_cache; |
| bool under_obb; |
| |
| bool under_knox; |
| }; |
| |
| /* sdcardfs inode data in memory */ |
| struct sdcardfs_inode_info { |
| struct inode *lower_inode; |
| /* state derived based on current position in hierarchy */ |
| struct sdcardfs_inode_data *data; |
| |
| /* top folder for ownership */ |
| struct sdcardfs_inode_data *top_data; |
| |
| struct inode vfs_inode; |
| }; |
| |
| |
| /* sdcardfs dentry data in memory */ |
| struct sdcardfs_dentry_info { |
| spinlock_t lock; /* protects lower_path */ |
| struct path lower_path; |
| struct path orig_path; |
| }; |
| |
| struct sdcardfs_mount_options { |
| uid_t fs_low_uid; |
| gid_t fs_low_gid; |
| userid_t fs_user_id; |
| bool multiuser; |
| bool gid_derivation; |
| unsigned int reserved_mb; |
| }; |
| |
| struct sdcardfs_vfsmount_options { |
| gid_t gid; |
| mode_t mask; |
| }; |
| |
| extern int parse_options_remount(struct super_block *sb, char *options, int silent, |
| struct sdcardfs_vfsmount_options *vfsopts); |
| |
| /* sdcardfs super-block data in memory */ |
| struct sdcardfs_sb_info { |
| struct super_block *sb; |
| struct super_block *lower_sb; |
| /* derived perm policy : some of options have been added |
| * to sdcardfs_mount_options (Android 4.4 support) |
| */ |
| struct sdcardfs_mount_options options; |
| spinlock_t lock; /* protects obbpath */ |
| char *obbpath_s; |
| struct path obbpath; |
| void *pkgl_id; |
| struct list_head list; |
| }; |
| |
| /* |
| * inode to private data |
| * |
| * Since we use containers and the struct inode is _inside_ the |
| * sdcardfs_inode_info structure, SDCARDFS_I will always (given a non-NULL |
| * inode pointer), return a valid non-NULL pointer. |
| */ |
| static inline struct sdcardfs_inode_info *SDCARDFS_I(const struct inode *inode) |
| { |
| return container_of(inode, struct sdcardfs_inode_info, vfs_inode); |
| } |
| |
| /* dentry to private data */ |
| #define SDCARDFS_D(dent) ((struct sdcardfs_dentry_info *)(dent)->d_fsdata) |
| |
| /* superblock to private data */ |
| #define SDCARDFS_SB(super) ((struct sdcardfs_sb_info *)(super)->s_fs_info) |
| |
| /* file to private Data */ |
| #define SDCARDFS_F(file) ((struct sdcardfs_file_info *)((file)->private_data)) |
| |
| /* file to lower file */ |
| static inline struct file *sdcardfs_lower_file(const struct file *f) |
| { |
| return SDCARDFS_F(f)->lower_file; |
| } |
| |
| static inline void sdcardfs_set_lower_file(struct file *f, struct file *val) |
| { |
| SDCARDFS_F(f)->lower_file = val; |
| } |
| |
| /* inode to lower inode. */ |
| static inline struct inode *sdcardfs_lower_inode(const struct inode *i) |
| { |
| return SDCARDFS_I(i)->lower_inode; |
| } |
| |
| static inline void sdcardfs_set_lower_inode(struct inode *i, struct inode *val) |
| { |
| SDCARDFS_I(i)->lower_inode = val; |
| } |
| |
| /* superblock to lower superblock */ |
| static inline struct super_block *sdcardfs_lower_super( |
| const struct super_block *sb) |
| { |
| return SDCARDFS_SB(sb)->lower_sb; |
| } |
| |
| static inline void sdcardfs_set_lower_super(struct super_block *sb, |
| struct super_block *val) |
| { |
| SDCARDFS_SB(sb)->lower_sb = val; |
| } |
| |
| /* path based (dentry/mnt) macros */ |
| static inline void pathcpy(struct path *dst, const struct path *src) |
| { |
| dst->dentry = src->dentry; |
| dst->mnt = src->mnt; |
| } |
| |
| /* sdcardfs_get_pname functions calls path_get() |
| * therefore, the caller must call "proper" path_put functions |
| */ |
| #define SDCARDFS_DENT_FUNC(pname) \ |
| static inline void sdcardfs_get_##pname(const struct dentry *dent, \ |
| struct path *pname) \ |
| { \ |
| spin_lock(&SDCARDFS_D(dent)->lock); \ |
| pathcpy(pname, &SDCARDFS_D(dent)->pname); \ |
| path_get(pname); \ |
| spin_unlock(&SDCARDFS_D(dent)->lock); \ |
| return; \ |
| } \ |
| static inline void sdcardfs_put_##pname(const struct dentry *dent, \ |
| struct path *pname) \ |
| { \ |
| path_put(pname); \ |
| return; \ |
| } \ |
| static inline void sdcardfs_set_##pname(const struct dentry *dent, \ |
| struct path *pname) \ |
| { \ |
| spin_lock(&SDCARDFS_D(dent)->lock); \ |
| pathcpy(&SDCARDFS_D(dent)->pname, pname); \ |
| spin_unlock(&SDCARDFS_D(dent)->lock); \ |
| return; \ |
| } \ |
| static inline void sdcardfs_reset_##pname(const struct dentry *dent) \ |
| { \ |
| spin_lock(&SDCARDFS_D(dent)->lock); \ |
| SDCARDFS_D(dent)->pname.dentry = NULL; \ |
| SDCARDFS_D(dent)->pname.mnt = NULL; \ |
| spin_unlock(&SDCARDFS_D(dent)->lock); \ |
| return; \ |
| } \ |
| static inline void sdcardfs_put_reset_##pname(const struct dentry *dent) \ |
| { \ |
| struct path pname; \ |
| spin_lock(&SDCARDFS_D(dent)->lock); \ |
| if (SDCARDFS_D(dent)->pname.dentry) { \ |
| pathcpy(&pname, &SDCARDFS_D(dent)->pname); \ |
| SDCARDFS_D(dent)->pname.dentry = NULL; \ |
| SDCARDFS_D(dent)->pname.mnt = NULL; \ |
| spin_unlock(&SDCARDFS_D(dent)->lock); \ |
| path_put(&pname); \ |
| } else \ |
| spin_unlock(&SDCARDFS_D(dent)->lock); \ |
| return; \ |
| } |
| |
| SDCARDFS_DENT_FUNC(lower_path) |
| SDCARDFS_DENT_FUNC(orig_path) |
| |
| static inline bool sbinfo_has_sdcard_magic(struct sdcardfs_sb_info *sbinfo) |
| { |
| return sbinfo && sbinfo->sb |
| && sbinfo->sb->s_magic == SDCARDFS_SUPER_MAGIC; |
| } |
| |
| static inline struct sdcardfs_inode_data *data_get( |
| struct sdcardfs_inode_data *data) |
| { |
| if (data) |
| kref_get(&data->refcount); |
| return data; |
| } |
| |
| static inline struct sdcardfs_inode_data *top_data_get( |
| struct sdcardfs_inode_info *info) |
| { |
| return data_get(info->top_data); |
| } |
| |
| extern void data_release(struct kref *ref); |
| |
| static inline void data_put(struct sdcardfs_inode_data *data) |
| { |
| kref_put(&data->refcount, data_release); |
| } |
| |
| static inline void release_own_data(struct sdcardfs_inode_info *info) |
| { |
| /* |
| * This happens exactly once per inode. At this point, the inode that |
| * originally held this data is about to be freed, and all references |
| * to it are held as a top value, and will likely be released soon. |
| */ |
| info->data->abandoned = true; |
| data_put(info->data); |
| } |
| |
| static inline void set_top(struct sdcardfs_inode_info *info, |
| struct sdcardfs_inode_data *top) |
| { |
| struct sdcardfs_inode_data *old_top = info->top_data; |
| |
| if (top) |
| data_get(top); |
| info->top_data = top; |
| if (old_top) |
| data_put(old_top); |
| } |
| |
| static inline int get_gid(struct vfsmount *mnt, |
| struct sdcardfs_inode_data *data) |
| { |
| struct sdcardfs_vfsmount_options *opts = mnt->data; |
| |
| if (data->under_knox) { |
| switch (data->perm) { |
| case PERM_KNOX_PRE_ROOT: |
| return AID_SDCARD_R; |
| case PERM_KNOX_ROOT: |
| case PERM_KNOX_ANDROID: |
| case PERM_KNOX_ANDROID_DATA: |
| case PERM_KNOX_ANDROID_PACKAGE: |
| return multiuser_get_uid(data->userid, AID_SDCARD_R); |
| case PERM_KNOX_ANDROID_SHARED: |
| return AID_SDCARD_RW; |
| default: |
| break; |
| } |
| } |
| |
| if (opts->gid == AID_SDCARD_RW) |
| /* As an optimization, certain trusted system components only run |
| * as owner but operate across all users. Since we're now handing |
| * out the sdcard_rw GID only to trusted apps, we're okay relaxing |
| * the user boundary enforcement for the default view. The UIDs |
| * assigned to app directories are still multiuser aware. |
| */ |
| return AID_SDCARD_RW; |
| else |
| return multiuser_get_uid(data->userid, opts->gid); |
| } |
| |
| static inline int get_mode(struct vfsmount *mnt, |
| struct sdcardfs_inode_info *info, |
| struct sdcardfs_inode_data *data) |
| { |
| int owner_mode; |
| int filtered_mode; |
| struct sdcardfs_vfsmount_options *opts = mnt->data; |
| int visible_mode = 0775 & ~opts->mask; |
| |
| |
| if (data->perm == PERM_PRE_ROOT) { |
| /* Top of multi-user view should always be visible to ensure |
| * secondary users can traverse inside. |
| */ |
| visible_mode = 0711; |
| } else if (data->under_android) { |
| /* Block "other" access to Android directories, since only apps |
| * belonging to a specific user should be in there; we still |
| * leave +x open for the default view. |
| */ |
| if (opts->gid == AID_SDCARD_RW) |
| visible_mode = visible_mode & ~0006; |
| else |
| visible_mode = visible_mode & ~0007; |
| } else if (data->perm == PERM_KNOX_ANDROID_PACKAGE) { |
| visible_mode = visible_mode & ~0006; |
| } |
| owner_mode = info->lower_inode->i_mode & 0700; |
| filtered_mode = visible_mode & (owner_mode | (owner_mode >> 3) | (owner_mode >> 6)); |
| return filtered_mode; |
| } |
| |
| static inline int has_graft_path(const struct dentry *dent) |
| { |
| int ret = 0; |
| |
| spin_lock(&SDCARDFS_D(dent)->lock); |
| if (SDCARDFS_D(dent)->orig_path.dentry != NULL) |
| ret = 1; |
| spin_unlock(&SDCARDFS_D(dent)->lock); |
| |
| return ret; |
| } |
| |
| static inline void sdcardfs_get_real_lower(const struct dentry *dent, |
| struct path *real_lower) |
| { |
| /* in case of a local obb dentry |
| * the orig_path should be returned |
| */ |
| if (has_graft_path(dent)) |
| sdcardfs_get_orig_path(dent, real_lower); |
| else |
| sdcardfs_get_lower_path(dent, real_lower); |
| } |
| |
| static inline void sdcardfs_put_real_lower(const struct dentry *dent, |
| struct path *real_lower) |
| { |
| if (has_graft_path(dent)) |
| sdcardfs_put_orig_path(dent, real_lower); |
| else |
| sdcardfs_put_lower_path(dent, real_lower); |
| } |
| |
| extern struct mutex sdcardfs_super_list_lock; |
| extern struct list_head sdcardfs_super_list; |
| |
| /* for packagelist.c */ |
| extern appid_t get_appid(const char *app_name); |
| extern appid_t get_ext_gid(const char *app_name); |
| extern appid_t is_excluded(const char *app_name, userid_t userid); |
| extern int check_caller_access_to_name(struct inode *parent_node, const struct qstr *name); |
| extern int packagelist_init(void); |
| extern void packagelist_exit(void); |
| |
| /* for derived_perm.c */ |
| #define BY_NAME (1 << 0) |
| #define BY_USERID (1 << 1) |
| struct limit_search { |
| unsigned int flags; |
| struct qstr name; |
| userid_t userid; |
| }; |
| |
| extern void setup_derived_state(struct inode *inode, perm_t perm, |
| userid_t userid, uid_t uid, bool under_android, |
| struct sdcardfs_inode_data *top); |
| extern void get_derived_permission(struct dentry *parent, struct dentry *dentry); |
| extern void get_derived_permission_new(struct dentry *parent, struct dentry *dentry, const struct qstr *name); |
| extern void fixup_perms_recursive(struct dentry *dentry, struct limit_search *limit); |
| |
| extern void update_derived_permission_lock(struct dentry *dentry); |
| void fixup_lower_ownership(struct dentry *dentry, const char *name); |
| extern int need_graft_path(struct dentry *dentry); |
| extern int is_base_obbpath(struct dentry *dentry); |
| extern int is_obbpath_invalid(struct dentry *dentry); |
| extern int setup_obb_dentry(struct dentry *dentry, struct path *lower_path); |
| |
| /* locking helpers */ |
| static inline struct dentry *lock_parent(struct dentry *dentry) |
| { |
| struct dentry *dir = dget_parent(dentry); |
| |
| mutex_lock_nested(&d_inode(dir)->i_mutex, I_MUTEX_PARENT); |
| return dir; |
| } |
| |
| static inline void unlock_dir(struct dentry *dir) |
| { |
| mutex_unlock(&d_inode(dir)->i_mutex); |
| dput(dir); |
| } |
| |
| static inline int prepare_dir(const char *path_s, uid_t uid, gid_t gid, mode_t mode) |
| { |
| int err; |
| struct dentry *dent; |
| struct iattr attrs; |
| struct path parent; |
| |
| dent = kern_path_locked(path_s, &parent); |
| if (IS_ERR(dent)) { |
| err = PTR_ERR(dent); |
| if (err == -EEXIST) |
| err = 0; |
| goto out_unlock; |
| } |
| |
| err = vfs_mkdir2(parent.mnt, d_inode(parent.dentry), dent, mode); |
| if (err) { |
| if (err == -EEXIST) |
| err = 0; |
| goto out_dput; |
| } |
| |
| attrs.ia_uid = make_kuid(&init_user_ns, uid); |
| attrs.ia_gid = make_kgid(&init_user_ns, gid); |
| attrs.ia_valid = ATTR_UID | ATTR_GID; |
| mutex_lock(&d_inode(dent)->i_mutex); |
| notify_change2(parent.mnt, dent, &attrs, NULL); |
| mutex_unlock(&d_inode(dent)->i_mutex); |
| |
| out_dput: |
| dput(dent); |
| |
| out_unlock: |
| /* parent dentry locked by lookup_create */ |
| mutex_unlock(&d_inode(parent.dentry)->i_mutex); |
| path_put(&parent); |
| return err; |
| } |
| |
| /* |
| * Return 1, if a disk has enough free space, otherwise 0. |
| * We assume that any files can not be overwritten. |
| */ |
| static inline int check_min_free_space(struct dentry *dentry, size_t size, int dir) |
| { |
| int err; |
| struct path lower_path; |
| struct kstatfs statfs; |
| u64 avail; |
| struct sdcardfs_sb_info *sbi = SDCARDFS_SB(dentry->d_sb); |
| |
| if (uid_eq(GLOBAL_ROOT_UID, current_fsuid()) || |
| capable(CAP_SYS_RESOURCE) || |
| in_group_p(AID_USE_ROOT_RESERVED) || |
| in_group_p(AID_USE_SEC_RESERVED)) |
| return 1; |
| |
| if (sbi->options.reserved_mb) { |
| /* Get fs stat of lower filesystem. */ |
| sdcardfs_get_lower_path(dentry->d_sb->s_root, &lower_path); |
| err = vfs_statfs(&lower_path, &statfs); |
| sdcardfs_put_lower_path(dentry->d_sb->s_root, &lower_path); |
| |
| if (unlikely(err)) |
| goto out_invalid; |
| |
| /* Invalid statfs informations. */ |
| if (unlikely(statfs.f_bsize == 0)) |
| goto out_invalid; |
| |
| /* if you are checking directory, set size to f_bsize. */ |
| if (unlikely(dir)) |
| size = statfs.f_bsize; |
| |
| /* available size */ |
| avail = statfs.f_bavail * statfs.f_bsize; |
| |
| /* not enough space */ |
| if ((u64)size > avail) |
| goto out_nospc; |
| |
| /* enough space */ |
| if ((avail - size) > (sbi->options.reserved_mb * 1024 * 1024)) |
| return 1; |
| |
| goto out_nospc; |
| } else |
| return 1; |
| |
| out_invalid: |
| pr_info("sdcardfs: statfs error : %d\n", err); |
| pr_info("sdcardfs: f_type : 0x%X\n", (u32) statfs.f_type); |
| pr_info("sdcardfs: f_blocks : %llu blocks\n", statfs.f_blocks); |
| pr_info("sdcardfs: f_bfree : %llu blocks\n", statfs.f_bfree); |
| pr_info("sdcardfs: f_files : %llu\n", statfs.f_files); |
| pr_info("sdcardfs: f_ffree : %llu\n", statfs.f_ffree); |
| pr_info("sdcardfs: f_fsid.val[1] : 0x%X\n", (u32) statfs.f_fsid.val[1]); |
| pr_info("sdcardfs: f_fsid.val[0] : 0x%X\n", (u32) statfs.f_fsid.val[0]); |
| pr_info("sdcardfs: f_namelen : %ld\n", statfs.f_namelen); |
| pr_info("sdcardfs: f_frsize : %ld\n", statfs.f_frsize); |
| pr_info("sdcardfs: f_flags : %ld\n", statfs.f_flags); |
| pr_info("sdcardfs: reserved_mb : %u\n", sbi->options.reserved_mb); |
| |
| out_nospc: |
| pr_info_ratelimited("sdcardfs: f_bavail: %llu f_bsize: %ld required: %llu\n", |
| statfs.f_bavail, statfs.f_bsize, (u64) size); |
| return 0; |
| } |
| |
| /* |
| * Copies attrs and maintains sdcardfs managed attrs |
| * Since our permission check handles all special permissions, set those to be open |
| */ |
| static inline void sdcardfs_copy_and_fix_attrs(struct inode *dest, const struct inode *src) |
| { |
| dest->i_mode = (src->i_mode & S_IFMT) | S_IRWXU | S_IRWXG | |
| S_IROTH | S_IXOTH; /* 0775 */ |
| dest->i_uid = make_kuid(&init_user_ns, SDCARDFS_I(dest)->data->d_uid); |
| dest->i_gid = make_kgid(&init_user_ns, AID_SDCARD_RW); |
| dest->i_rdev = src->i_rdev; |
| dest->i_atime = src->i_atime; |
| dest->i_mtime = src->i_mtime; |
| dest->i_ctime = src->i_ctime; |
| dest->i_blkbits = src->i_blkbits; |
| dest->i_flags = src->i_flags; |
| set_nlink(dest, src->i_nlink); |
| } |
| |
| static inline bool str_case_eq(const char *s1, const char *s2) |
| { |
| return !strcasecmp(s1, s2); |
| } |
| |
| static inline bool str_n_case_eq(const char *s1, const char *s2, size_t len) |
| { |
| return !strncasecmp(s1, s2, len); |
| } |
| |
| static inline bool qstr_case_eq(const struct qstr *q1, const struct qstr *q2) |
| { |
| return q1->len == q2->len && str_case_eq(q1->name, q2->name); |
| } |
| |
| static inline bool qstr_n_case_eq(const struct qstr *q1, const struct qstr *q2) |
| { |
| return q1->len == q2->len && str_n_case_eq(q1->name, q2->name, q1->len); |
| } |
| |
| #define QSTR_LITERAL(string) QSTR_INIT(string, sizeof(string)-1) |
| |
| #endif /* not _SDCARDFS_H_ */ |