debug_object_activate – debug checks when an object is activated Synopsis int debug_object_activate(void *addr, struct debug_obj_descr *descr); Arguments addr address of the object descr pointer to an object specific debug description structure Returns 0 for success, -EINVAL for check failed. Author Thomas Gleixner <tglx [at] linutronix.de> Author. Copyright
deactivate_super – drop an active reference to superblock Synopsis void deactivate_super(struct super_block *s); Arguments s superblock to deactivate Description Variant of deactivate_locked_super, except that superblock is *not* locked by caller. If we are going to drop the final active reference, lock will be acquired prior to that. Copyright
deactivate_locked_super – drop an active reference to superblock Synopsis void deactivate_locked_super(struct super_block *s); Arguments s superblock to deactivate Description Drops an active reference to superblock, converting it into a temporary one if there is no other active references left. In that case we tell fs driver to shut it down and drop the temporary reference…
datagram_poll – generic datagram poll Synopsis unsigned int datagram_poll(struct file *file, struct socket *sock, poll_table *wait); Arguments file file struct sock socket wait poll table Description Datagram poll: Again totally generic. This also handles sequenced packet sockets providing the socket receive queue is only ever holding data ready to receive. Note when you _don’t_ use…
d_unhashed – is dentry hashed Synopsis int d_unhashed(const struct dentry *dentry); Arguments dentry entry to check Description Returns true if the dentry passed is not currently hashed. Copyright
d_splice_alias – splice a disconnected dentry into the tree if one exists Synopsis struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry); Arguments inode the inode which may have a disconnected dentry dentry a negative dentry which we want to point to the inode. Description If inode is a directory and has an IS_ROOT alias, then…
d_rehash – add an entry back to the hash Synopsis void d_rehash(struct dentry *entry); Arguments entry dentry to add to the hash Description Adds a dentry to the hash according to its name. Copyright
d_really_is_positive – Determine if a dentry is really positive (ignoring fallthroughs) Synopsis bool d_really_is_positive(const struct dentry * dentry); Arguments dentry The dentry in question Description Returns true if the dentry represents a name that maps to an inode (ie. ->d_inode is not NULL). The dentry might still represent a whiteout if that is represented on medium as…
d_really_is_negative – Determine if a dentry is really negative (ignoring fallthroughs) Synopsis bool d_really_is_negative(const struct dentry * dentry); Arguments dentry The dentry in question Description Returns true if the dentry represents either an absent name or a name that doesn’t map to an inode (ie. ->d_inode is NULL). The dentry could represent a true miss, a whiteout…
d_real_inode – Return the real inode Synopsis struct inode *d_real_inode(const struct dentry *dentry); Arguments dentry The dentry to query Description If dentry is on an union/overlay, then return the underlying, real inode. Otherwise return d_inode. Copyright
d_real – Return the real dentry Synopsis struct dentry *d_real(struct dentry *dentry, const struct inode *inode, unsigned int flags); Arguments dentry the dentry to query inode inode to select the dentry from multiple layers (can be NULL) flags open flags to control copy-up behavior Description If dentry is on an union/overlay, then return the underlying,…
d_path – return the path of a dentry Synopsis char *d_path(const struct path *path, char *buf, int buflen); Arguments path path to report buf buffer to return value in buflen buffer length Description Convert a dentry into an ASCII path name. If the entry has been deleted the string ” (deleted)” is appended. Note that…
d_obtain_root – find or allocate a dentry for a given inode Synopsis struct dentry *d_obtain_root(struct inode *inode); Arguments inode inode to allocate the dentry for Description Obtain an IS_ROOT dentry for the root of a filesystem. We must ensure that directory inodes only ever have one dentry. If a dentry is found, that is returned…
d_obtain_alias – find or allocate a DISCONNECTED dentry for a given inode Synopsis struct dentry *d_obtain_alias(struct inode *inode); Arguments inode inode to allocate the dentry for Description Obtain a dentry for an inode resulting from NFS filehandle conversion or similar open by handle operations. The returned dentry may be anonymous, or may have a full…
d_lookup – search for a dentry Synopsis struct dentry *d_lookup(const struct dentry *parent, const struct qstr *name); Arguments parent parent dentry name qstr of name we wish to find Return dentry, or NULL d_lookup searches the children of the parent dentry for the name in question. If the dentry is found its reference count is…
d_invalidate – detach submounts, prune dcache, and drop Synopsis void d_invalidate(struct dentry *dentry); Arguments dentry dentry to invalidate (aka detach, prune and drop) Description no dcache lock. The final d_drop is done as an atomic operation relative to rename_lock ensuring there are no races with d_set_mounted. This ensures there are no unhashed dentries on the…
d_instantiate_no_diralias – instantiate a non-aliased dentry Synopsis int d_instantiate_no_diralias(struct dentry *entry, struct inode *inode); Arguments entry dentry to complete inode inode to attach to this dentry Description Fill in inode information in the entry. If a directory alias is found, then return an error (and drop inode). Together with d_materialise_unique this guarantees that a directory…
d_instantiate – fill in inode information for a dentry Synopsis void d_instantiate(struct dentry *entry, struct inode *inode); Arguments entry dentry to complete inode inode to attach to this dentry Description Fill in inode information in the entry. This turns negative dentries into productive full members of society. NOTE! This assumes that the inode count has…
d_inode_rcu – Get the actual inode of this dentry with ACCESS_ONCE Synopsis struct inode *d_inode_rcu(const struct dentry *dentry); Arguments dentry The dentry to query Description This is the helper normal filesystems should use to get at their own inodes in their own dentries and ignore the layering superimposed upon them. Copyright
d_inode – Get the actual inode of this dentry Synopsis struct inode *d_inode(const struct dentry *dentry); Arguments dentry The dentry to query Description This is the helper normal filesystems should use to get at their own inodes in their own dentries and ignore the layering superimposed upon them. Copyright