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author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-05-02 18:14:01 +0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-05-02 18:14:01 +0200 |
commit | 27787ba3fa4904422b3928b898d1bd3d74d98bea (patch) | |
tree | 72fce8989a8214f927f3afccaa39d11de38ccb59 /fs | |
parent | Merge branch 'work.ecryptfs' of git://git.kernel.org/pub/scm/linux/kernel/git... (diff) | |
parent | useful constants: struct qstr for ".." (diff) | |
download | linux-27787ba3fa4904422b3928b898d1bd3d74d98bea.tar.xz linux-27787ba3fa4904422b3928b898d1bd3d74d98bea.zip |
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull misc vfs updates from Al Viro:
"Assorted stuff all over the place"
* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
useful constants: struct qstr for ".."
hostfs_open(): don't open-code file_dentry()
whack-a-mole: kill strlen_user() (again)
autofs: should_expire() argument is guaranteed to be positive
apparmor:match_mn() - constify devpath argument
buffer: a small optimization in grow_buffers
get rid of autofs_getpath()
constify dentry argument of dentry_path()/dentry_path_raw()
Diffstat (limited to 'fs')
-rw-r--r-- | fs/autofs/autofs_i.h | 1 | ||||
-rw-r--r-- | fs/autofs/expire.c | 2 | ||||
-rw-r--r-- | fs/autofs/waitq.c | 72 | ||||
-rw-r--r-- | fs/buffer.c | 6 | ||||
-rw-r--r-- | fs/d_path.c | 10 | ||||
-rw-r--r-- | fs/dcache.c | 2 | ||||
-rw-r--r-- | fs/ext2/namei.c | 3 | ||||
-rw-r--r-- | fs/ext4/namei.c | 3 | ||||
-rw-r--r-- | fs/f2fs/dir.c | 4 | ||||
-rw-r--r-- | fs/f2fs/namei.c | 3 | ||||
-rw-r--r-- | fs/fuse/inode.c | 3 | ||||
-rw-r--r-- | fs/hostfs/hostfs_kern.c | 2 | ||||
-rw-r--r-- | fs/nilfs2/namei.c | 3 | ||||
-rw-r--r-- | fs/udf/namei.c | 3 | ||||
-rw-r--r-- | fs/ufs/super.c | 3 |
15 files changed, 35 insertions, 85 deletions
diff --git a/fs/autofs/autofs_i.h b/fs/autofs/autofs_i.h index 054f97b07754..918826eaceea 100644 --- a/fs/autofs/autofs_i.h +++ b/fs/autofs/autofs_i.h @@ -87,6 +87,7 @@ struct autofs_wait_queue { autofs_wqt_t wait_queue_token; /* We use the following to see what we are waiting for */ struct qstr name; + u32 offset; u32 dev; u64 ino; kuid_t uid; diff --git a/fs/autofs/expire.c b/fs/autofs/expire.c index a1c7701007e7..b3fefd6237c3 100644 --- a/fs/autofs/expire.c +++ b/fs/autofs/expire.c @@ -355,7 +355,7 @@ static struct dentry *should_expire(struct dentry *dentry, return NULL; } - if (d_really_is_positive(dentry) && d_is_symlink(dentry)) { + if (d_is_symlink(dentry)) { pr_debug("checking symlink %p %pd\n", dentry, dentry); /* Forced expire, user space handles busy mounts */ diff --git a/fs/autofs/waitq.c b/fs/autofs/waitq.c index 5ced859dac53..16b5fca0626e 100644 --- a/fs/autofs/waitq.c +++ b/fs/autofs/waitq.c @@ -30,7 +30,7 @@ void autofs_catatonic_mode(struct autofs_sb_info *sbi) while (wq) { nwq = wq->next; wq->status = -ENOENT; /* Magic is gone - report failure */ - kfree(wq->name.name); + kfree(wq->name.name - wq->offset); wq->name.name = NULL; wq->wait_ctr--; wake_up_interruptible(&wq->queue); @@ -175,51 +175,6 @@ static void autofs_notify_daemon(struct autofs_sb_info *sbi, fput(pipe); } -static int autofs_getpath(struct autofs_sb_info *sbi, - struct dentry *dentry, char *name) -{ - struct dentry *root = sbi->sb->s_root; - struct dentry *tmp; - char *buf; - char *p; - int len; - unsigned seq; - -rename_retry: - buf = name; - len = 0; - - seq = read_seqbegin(&rename_lock); - rcu_read_lock(); - spin_lock(&sbi->fs_lock); - for (tmp = dentry ; tmp != root ; tmp = tmp->d_parent) - len += tmp->d_name.len + 1; - - if (!len || --len > NAME_MAX) { - spin_unlock(&sbi->fs_lock); - rcu_read_unlock(); - if (read_seqretry(&rename_lock, seq)) - goto rename_retry; - return 0; - } - - *(buf + len) = '\0'; - p = buf + len - dentry->d_name.len; - strncpy(p, dentry->d_name.name, dentry->d_name.len); - - for (tmp = dentry->d_parent; tmp != root ; tmp = tmp->d_parent) { - *(--p) = '/'; - p -= tmp->d_name.len; - strncpy(p, tmp->d_name.name, tmp->d_name.len); - } - spin_unlock(&sbi->fs_lock); - rcu_read_unlock(); - if (read_seqretry(&rename_lock, seq)) - goto rename_retry; - - return len; -} - static struct autofs_wait_queue * autofs_find_wait(struct autofs_sb_info *sbi, const struct qstr *qstr) { @@ -352,6 +307,7 @@ int autofs_wait(struct autofs_sb_info *sbi, struct qstr qstr; char *name; int status, ret, type; + unsigned int offset = 0; pid_t pid; pid_t tgid; @@ -389,20 +345,23 @@ int autofs_wait(struct autofs_sb_info *sbi, return -ENOMEM; /* If this is a direct mount request create a dummy name */ - if (IS_ROOT(dentry) && autofs_type_trigger(sbi->type)) + if (IS_ROOT(dentry) && autofs_type_trigger(sbi->type)) { + qstr.name = name; qstr.len = sprintf(name, "%p", dentry); - else { - qstr.len = autofs_getpath(sbi, dentry, name); - if (!qstr.len) { + } else { + char *p = dentry_path_raw(dentry, name, NAME_MAX); + if (IS_ERR(p)) { kfree(name); return -ENOENT; } + qstr.name = ++p; // skip the leading slash + qstr.len = strlen(p); + offset = p - name; } - qstr.name = name; qstr.hash = full_name_hash(dentry, name, qstr.len); if (mutex_lock_interruptible(&sbi->wq_mutex)) { - kfree(qstr.name); + kfree(name); return -EINTR; } @@ -410,7 +369,7 @@ int autofs_wait(struct autofs_sb_info *sbi, if (ret <= 0) { if (ret != -EINTR) mutex_unlock(&sbi->wq_mutex); - kfree(qstr.name); + kfree(name); return ret; } @@ -418,7 +377,7 @@ int autofs_wait(struct autofs_sb_info *sbi, /* Create a new wait queue */ wq = kmalloc(sizeof(struct autofs_wait_queue), GFP_KERNEL); if (!wq) { - kfree(qstr.name); + kfree(name); mutex_unlock(&sbi->wq_mutex); return -ENOMEM; } @@ -430,6 +389,7 @@ int autofs_wait(struct autofs_sb_info *sbi, sbi->queues = wq; init_waitqueue_head(&wq->queue); memcpy(&wq->name, &qstr, sizeof(struct qstr)); + wq->offset = offset; wq->dev = autofs_get_dev(sbi); wq->ino = autofs_get_ino(sbi); wq->uid = current_uid(); @@ -469,7 +429,7 @@ int autofs_wait(struct autofs_sb_info *sbi, (unsigned long) wq->wait_queue_token, wq->name.len, wq->name.name, notify); mutex_unlock(&sbi->wq_mutex); - kfree(qstr.name); + kfree(name); } /* @@ -540,7 +500,7 @@ int autofs_wait_release(struct autofs_sb_info *sbi, } *wql = wq->next; /* Unlink from chain */ - kfree(wq->name.name); + kfree(wq->name.name - wq->offset); wq->name.name = NULL; /* Do not wait on this queue */ wq->status = status; wake_up(&wq->queue); diff --git a/fs/buffer.c b/fs/buffer.c index 0cb7ffd4977c..c2e052c0fc5d 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -1020,11 +1020,7 @@ grow_buffers(struct block_device *bdev, sector_t block, int size, gfp_t gfp) pgoff_t index; int sizebits; - sizebits = -1; - do { - sizebits++; - } while ((size << sizebits) < PAGE_SIZE); - + sizebits = PAGE_SHIFT - __ffs(size); index = block >> sizebits; /* diff --git a/fs/d_path.c b/fs/d_path.c index a69e2cd36e6e..270d62133996 100644 --- a/fs/d_path.c +++ b/fs/d_path.c @@ -326,9 +326,9 @@ char *simple_dname(struct dentry *dentry, char *buffer, int buflen) /* * Write full pathname from the root of the filesystem into the buffer. */ -static char *__dentry_path(struct dentry *d, char *buf, int buflen) +static char *__dentry_path(const struct dentry *d, char *buf, int buflen) { - struct dentry *dentry; + const struct dentry *dentry; char *end, *retval; int len, seq = 0; int error = 0; @@ -347,7 +347,7 @@ restart: *retval = '/'; read_seqbegin_or_lock(&rename_lock, &seq); while (!IS_ROOT(dentry)) { - struct dentry *parent = dentry->d_parent; + const struct dentry *parent = dentry->d_parent; prefetch(parent); error = prepend_name(&end, &len, &dentry->d_name); @@ -371,13 +371,13 @@ Elong: return ERR_PTR(-ENAMETOOLONG); } -char *dentry_path_raw(struct dentry *dentry, char *buf, int buflen) +char *dentry_path_raw(const struct dentry *dentry, char *buf, int buflen) { return __dentry_path(dentry, buf, buflen); } EXPORT_SYMBOL(dentry_path_raw); -char *dentry_path(struct dentry *dentry, char *buf, int buflen) +char *dentry_path(const struct dentry *dentry, char *buf, int buflen) { char *p = NULL; char *retval; diff --git a/fs/dcache.c b/fs/dcache.c index 7d24ff7eb206..cf871a81f4fd 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -84,6 +84,8 @@ const struct qstr empty_name = QSTR_INIT("", 0); EXPORT_SYMBOL(empty_name); const struct qstr slash_name = QSTR_INIT("/", 1); EXPORT_SYMBOL(slash_name); +const struct qstr dotdot_name = QSTR_INIT("..", 2); +EXPORT_SYMBOL(dotdot_name); /* * This is the single most critical data structure when it comes diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c index c6b8bba73031..1f69b81655b6 100644 --- a/fs/ext2/namei.c +++ b/fs/ext2/namei.c @@ -81,11 +81,10 @@ static struct dentry *ext2_lookup(struct inode * dir, struct dentry *dentry, uns struct dentry *ext2_get_parent(struct dentry *child) { - struct qstr dotdot = QSTR_INIT("..", 2); ino_t ino; int res; - res = ext2_inode_by_name(d_inode(child), &dotdot, &ino); + res = ext2_inode_by_name(d_inode(child), &dotdot_name, &ino); if (res) return ERR_PTR(res); diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index e8100a9a22fe..afb9d05a99ba 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -1814,11 +1814,10 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi struct dentry *ext4_get_parent(struct dentry *child) { __u32 ino; - static const struct qstr dotdot = QSTR_INIT("..", 2); struct ext4_dir_entry_2 * de; struct buffer_head *bh; - bh = ext4_find_entry(d_inode(child), &dotdot, &de, NULL); + bh = ext4_find_entry(d_inode(child), &dotdot_name, &de, NULL); if (IS_ERR(bh)) return ERR_CAST(bh); if (!bh) diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c index e6270a867be1..e211a1b6b013 100644 --- a/fs/f2fs/dir.c +++ b/fs/f2fs/dir.c @@ -449,9 +449,7 @@ struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir, struct f2fs_dir_entry *f2fs_parent_dir(struct inode *dir, struct page **p) { - struct qstr dotdot = QSTR_INIT("..", 2); - - return f2fs_find_entry(dir, &dotdot, p); + return f2fs_find_entry(dir, &dotdot_name, p); } ino_t f2fs_inode_by_name(struct inode *dir, const struct qstr *qstr, diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c index 14bf4f65bcb3..377c6b161b23 100644 --- a/fs/f2fs/namei.c +++ b/fs/f2fs/namei.c @@ -416,9 +416,8 @@ out: struct dentry *f2fs_get_parent(struct dentry *child) { - struct qstr dotdot = QSTR_INIT("..", 2); struct page *page; - unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page); + unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot_name, &page); if (!ino) { if (IS_ERR(page)) return ERR_CAST(page); diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index 6c995201cd4d..393e36b74dc4 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -873,14 +873,13 @@ static struct dentry *fuse_get_parent(struct dentry *child) struct inode *inode; struct dentry *parent; struct fuse_entry_out outarg; - const struct qstr name = QSTR_INIT("..", 2); int err; if (!fc->export_support) return ERR_PTR(-ESTALE); err = fuse_lookup_name(child_inode->i_sb, get_node_id(child_inode), - &name, &outarg, &inode); + &dotdot_name, &outarg, &inode); if (err) { if (err == -ENOENT) return ERR_PTR(-ESTALE); diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c index 7b5e984ff02a..7d0c3dbb2898 100644 --- a/fs/hostfs/hostfs_kern.c +++ b/fs/hostfs/hostfs_kern.c @@ -316,7 +316,7 @@ retry: if (mode & FMODE_WRITE) r = w = 1; - name = dentry_name(d_real(file->f_path.dentry, file->f_inode)); + name = dentry_name(file_dentry(file)); if (name == NULL) return -ENOMEM; diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c index 189bd1007a2f..91eebeb0c48b 100644 --- a/fs/nilfs2/namei.c +++ b/fs/nilfs2/namei.c @@ -440,10 +440,9 @@ static struct dentry *nilfs_get_parent(struct dentry *child) { unsigned long ino; struct inode *inode; - struct qstr dotdot = QSTR_INIT("..", 2); struct nilfs_root *root; - ino = nilfs_inode_by_name(d_inode(child), &dotdot); + ino = nilfs_inode_by_name(d_inode(child), &dotdot_name); if (!ino) return ERR_PTR(-ENOENT); diff --git a/fs/udf/namei.c b/fs/udf/namei.c index f146b3089f3d..3ae9f1e91984 100644 --- a/fs/udf/namei.c +++ b/fs/udf/namei.c @@ -1215,11 +1215,10 @@ static struct dentry *udf_get_parent(struct dentry *child) { struct kernel_lb_addr tloc; struct inode *inode = NULL; - struct qstr dotdot = QSTR_INIT("..", 2); struct fileIdentDesc cfi; struct udf_fileident_bh fibh; - if (!udf_find_entry(d_inode(child), &dotdot, &fibh, &cfi)) + if (!udf_find_entry(d_inode(child), &dotdot_name, &fibh, &cfi)) return ERR_PTR(-EACCES); if (fibh.sbh != fibh.ebh) diff --git a/fs/ufs/super.c b/fs/ufs/super.c index 983558b572c7..74028b5a7b0a 100644 --- a/fs/ufs/super.c +++ b/fs/ufs/super.c @@ -128,10 +128,9 @@ static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid, static struct dentry *ufs_get_parent(struct dentry *child) { - struct qstr dot_dot = QSTR_INIT("..", 2); ino_t ino; - ino = ufs_inode_by_name(d_inode(child), &dot_dot); + ino = ufs_inode_by_name(d_inode(child), &dotdot_name); if (!ino) return ERR_PTR(-ENOENT); return d_obtain_alias(ufs_iget(child->d_sb, ino)); |