diff options
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 57 |
1 files changed, 35 insertions, 22 deletions
diff --git a/fs/namei.c b/fs/namei.c index e0f59031be87..5e4206f45371 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -2169,17 +2169,26 @@ exit: return ERR_PTR(error); } +struct open_flags { + int open_flag; + int mode; + int acc_mode; + int intent; +}; + /* * Handle O_CREAT case for do_filp_open */ static struct file *do_last(struct nameidata *nd, struct path *path, - int open_flag, int acc_mode, - int mode, const char *pathname) + const struct open_flags *op, const char *pathname) { struct dentry *dir = nd->path.dentry; struct file *filp; int error; + nd->flags &= ~LOOKUP_PARENT; + nd->flags |= op->intent; + switch (nd->last_type) { case LAST_DOTDOT: follow_dotdot(nd); @@ -2233,7 +2242,7 @@ static struct file *do_last(struct nameidata *nd, struct path *path, error = mnt_want_write(nd->path.mnt); if (error) goto exit_mutex_unlock; - error = __open_namei_create(nd, path, open_flag, mode); + error = __open_namei_create(nd, path, op->open_flag, op->mode); if (error) { mnt_drop_write(nd->path.mnt); goto exit; @@ -2242,7 +2251,7 @@ static struct file *do_last(struct nameidata *nd, struct path *path, mnt_drop_write(nd->path.mnt); path_put(&nd->path); if (!IS_ERR(filp)) { - error = ima_file_check(filp, acc_mode); + error = ima_file_check(filp, op->acc_mode); if (error) { fput(filp); filp = ERR_PTR(error); @@ -2258,7 +2267,7 @@ static struct file *do_last(struct nameidata *nd, struct path *path, audit_inode(pathname, path->dentry); error = -EEXIST; - if (open_flag & O_EXCL) + if (op->open_flag & O_EXCL) goto exit_dput; error = follow_managed(path, nd->flags); @@ -2278,7 +2287,7 @@ static struct file *do_last(struct nameidata *nd, struct path *path, if (S_ISDIR(nd->inode->i_mode)) goto exit; ok: - filp = finish_open(nd, open_flag, acc_mode); + filp = finish_open(nd, op->open_flag, op->acc_mode); return filp; exit_mutex_unlock: @@ -2304,7 +2313,8 @@ struct file *do_filp_open(int dfd, const char *pathname, struct path path; int count = 0; int flag = open_to_namei_flags(open_flag); - int flags; + int flags = 0; + struct open_flags op; if (!(open_flag & O_CREAT)) mode = 0; @@ -2321,6 +2331,8 @@ struct file *do_filp_open(int dfd, const char *pathname, if (open_flag & __O_SYNC) open_flag |= O_DSYNC; + op.open_flag = open_flag; + if (!acc_mode) acc_mode = MAY_OPEN | ACC_MODE(open_flag); @@ -2333,12 +2345,15 @@ struct file *do_filp_open(int dfd, const char *pathname, if (open_flag & O_APPEND) acc_mode |= MAY_APPEND; - flags = LOOKUP_OPEN; + op.acc_mode = acc_mode; + + op.intent = LOOKUP_OPEN; if (open_flag & O_CREAT) { - flags |= LOOKUP_CREATE; + op.intent |= LOOKUP_CREATE; if (open_flag & O_EXCL) - flags |= LOOKUP_EXCL; + op.intent |= LOOKUP_EXCL; } + if (open_flag & O_DIRECTORY) flags |= LOOKUP_DIRECTORY; if (!(open_flag & O_NOFOLLOW)) @@ -2357,7 +2372,7 @@ struct file *do_filp_open(int dfd, const char *pathname, goto creat; /* !O_CREAT, simple open */ - error = do_path_lookup(dfd, pathname, flags, &nd); + error = do_path_lookup(dfd, pathname, flags | op.intent, &nd); if (unlikely(error)) goto out_filp2; error = -ELOOP; @@ -2384,14 +2399,14 @@ out_filp2: creat: /* OK, have to create the file. Find the parent. */ - error = path_lookupat(dfd, pathname, LOOKUP_PARENT | LOOKUP_RCU, &nd); + error = path_lookupat(dfd, pathname, + LOOKUP_PARENT | LOOKUP_RCU | flags, &nd); if (unlikely(error == -ECHILD)) - error = path_lookupat(dfd, pathname, LOOKUP_PARENT, &nd); + error = path_lookupat(dfd, pathname, LOOKUP_PARENT | flags, &nd); if (unlikely(error == -ESTALE)) { reval: flags |= LOOKUP_REVAL; - error = path_lookupat(dfd, pathname, - LOOKUP_PARENT | LOOKUP_REVAL, &nd); + error = path_lookupat(dfd, pathname, LOOKUP_PARENT | flags, &nd); } if (unlikely(error)) goto out_filp; @@ -2401,8 +2416,7 @@ reval: /* * We have the parent and last component. */ - nd.flags = (nd.flags & ~LOOKUP_PARENT) | flags; - filp = do_last(&nd, &path, open_flag, acc_mode, mode, pathname); + filp = do_last(&nd, &path, &op, pathname); while (unlikely(!filp)) { /* trailing symlink */ struct path link = path; struct inode *linki = link.dentry->d_inode; @@ -2424,13 +2438,12 @@ reval: * just set LAST_BIND. */ nd.flags |= LOOKUP_PARENT; + nd.flags &= ~(LOOKUP_OPEN|LOOKUP_CREATE|LOOKUP_EXCL); error = __do_follow_link(&link, &nd, &cookie); - if (unlikely(error)) { + if (unlikely(error)) filp = ERR_PTR(error); - } else { - nd.flags &= ~LOOKUP_PARENT; - filp = do_last(&nd, &path, open_flag, acc_mode, mode, pathname); - } + else + filp = do_last(&nd, &path, &op, pathname); if (!IS_ERR(cookie) && linki->i_op->put_link) linki->i_op->put_link(link.dentry, &nd, cookie); path_put(&link); |