diff options
Diffstat (limited to 'fs/kernfs/inode.c')
| -rw-r--r-- | fs/kernfs/inode.c | 60 |
1 files changed, 26 insertions, 34 deletions
diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c index b4cae6fd717b..a1f83825afca 100644 --- a/fs/kernfs/inode.c +++ b/fs/kernfs/inode.c @@ -43,15 +43,17 @@ void __init sysfs_inode_init(void) panic("failed to init sysfs_backing_dev_info"); } -static struct sysfs_inode_attrs *sysfs_init_inode_attrs(struct sysfs_dirent *sd) +static struct sysfs_inode_attrs *sysfs_inode_attrs(struct sysfs_dirent *sd) { - struct sysfs_inode_attrs *attrs; struct iattr *iattrs; - attrs = kzalloc(sizeof(struct sysfs_inode_attrs), GFP_KERNEL); - if (!attrs) + if (sd->s_iattr) + return sd->s_iattr; + + sd->s_iattr = kzalloc(sizeof(struct sysfs_inode_attrs), GFP_KERNEL); + if (!sd->s_iattr) return NULL; - iattrs = &attrs->ia_iattr; + iattrs = &sd->s_iattr->ia_iattr; /* assign default attributes */ iattrs->ia_mode = sd->s_mode; @@ -59,26 +61,20 @@ static struct sysfs_inode_attrs *sysfs_init_inode_attrs(struct sysfs_dirent *sd) iattrs->ia_gid = GLOBAL_ROOT_GID; iattrs->ia_atime = iattrs->ia_mtime = iattrs->ia_ctime = CURRENT_TIME; - return attrs; + return sd->s_iattr; } static int __kernfs_setattr(struct sysfs_dirent *sd, const struct iattr *iattr) { - struct sysfs_inode_attrs *sd_attrs; + struct sysfs_inode_attrs *attrs; struct iattr *iattrs; unsigned int ia_valid = iattr->ia_valid; - sd_attrs = sd->s_iattr; + attrs = sysfs_inode_attrs(sd); + if (!attrs) + return -ENOMEM; - if (!sd_attrs) { - /* setting attributes for the first time, allocate now */ - sd_attrs = sysfs_init_inode_attrs(sd); - if (!sd_attrs) - return -ENOMEM; - sd->s_iattr = sd_attrs; - } - /* attributes were changed at least once in past */ - iattrs = &sd_attrs->ia_iattr; + iattrs = &attrs->ia_iattr; if (ia_valid & ATTR_UID) iattrs->ia_uid = iattr->ia_uid; @@ -143,22 +139,19 @@ out: static int sysfs_sd_setsecdata(struct sysfs_dirent *sd, void **secdata, u32 *secdata_len) { - struct sysfs_inode_attrs *iattrs; + struct sysfs_inode_attrs *attrs; void *old_secdata; size_t old_secdata_len; - if (!sd->s_iattr) { - sd->s_iattr = sysfs_init_inode_attrs(sd); - if (!sd->s_iattr) - return -ENOMEM; - } + attrs = sysfs_inode_attrs(sd); + if (!attrs) + return -ENOMEM; - iattrs = sd->s_iattr; - old_secdata = iattrs->ia_secdata; - old_secdata_len = iattrs->ia_secdata_len; + old_secdata = attrs->ia_secdata; + old_secdata_len = attrs->ia_secdata_len; - iattrs->ia_secdata = *secdata; - iattrs->ia_secdata_len = *secdata_len; + attrs->ia_secdata = *secdata; + attrs->ia_secdata_len = *secdata_len; *secdata = old_secdata; *secdata_len = old_secdata_len; @@ -216,17 +209,16 @@ static inline void set_inode_attr(struct inode *inode, struct iattr *iattr) static void sysfs_refresh_inode(struct sysfs_dirent *sd, struct inode *inode) { - struct sysfs_inode_attrs *iattrs = sd->s_iattr; + struct sysfs_inode_attrs *attrs = sd->s_iattr; inode->i_mode = sd->s_mode; - if (iattrs) { + if (attrs) { /* sysfs_dirent has non-default attributes * get them from persistent copy in sysfs_dirent */ - set_inode_attr(inode, &iattrs->ia_iattr); - security_inode_notifysecctx(inode, - iattrs->ia_secdata, - iattrs->ia_secdata_len); + set_inode_attr(inode, &attrs->ia_iattr); + security_inode_notifysecctx(inode, attrs->ia_secdata, + attrs->ia_secdata_len); } if (sysfs_type(sd) == SYSFS_DIR) |