Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\namei.c Create Date:2022-07-28 20:05:04
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:This looks up the name in dcache and possibly revalidates the found dentry.* NULL is returned if the dentry does not exist in the cache.

Proto:static struct dentry *lookup_dcache(const struct qstr *name, struct dentry *dir, unsigned int flags)

Type:struct dentry

Parameter:

TypeParameterName
const struct qstr *name
struct dentry *dir
unsigned intflags
1508  dentry = search for a dentry
1509  If dentry Then
1510  error = d_revalidate(dentry, flags)
1511  If Value for the false possibility is greater at compile time(error <= 0) Then
1512  If Not error Then invalidate a dentry
1514  dput(dentry)
1515  Return ERR_PTR(error)
1518  Return dentry
Caller
NameDescribe
__lookup_hashParent directory has inode locked exclusive. This is one* and only case when ->lookup() gets called on non in-lookup* dentries - as the matter of fact, this only gets called* when directory is guaranteed to have no in-lookup children* at all.
try_lookup_one_lenry_lookup_one_len - filesystem helper to lookup single pathname component*@name: pathname component to lookup*@base: base directory to lookup from*@len: maximum length @len should be interpreted to* Look up a dentry by name in the dcache, returning NULL
lookup_one_lenlookup_one_len - filesystem helper to lookup single pathname component*@name: pathname component to lookup*@base: base directory to lookup from*@len: maximum length @len should be interpreted to* Note that this routine is purely a helper for filesystem
lookup_one_len_unlockedlookup_one_len_unlocked - filesystem helper to lookup single pathname component*@name: pathname component to lookup*@base: base directory to lookup from*@len: maximum length @len should be interpreted to* Note that this routine is purely a helper for