From: Muneendra <muneendra.kumar@broadcom.com> To: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, tj@kernel.org, linux-nvme@lists.infradead.org, hare@suse.de Cc: jsmart2021@gmail.com, emilne@redhat.com, mkumar@redhat.com, Muneendra <muneendra.kumar@broadcom.com> Subject: [PATCH v9 01/13] cgroup: Added cgroup_get_from_id Date: Wed, 7 Apr 2021 04:36:25 +0530 [thread overview] Message-ID: <1617750397-26466-2-git-send-email-muneendra.kumar@broadcom.com> (raw) In-Reply-To: <1617750397-26466-1-git-send-email-muneendra.kumar@broadcom.com> Added a new function cgroup_get_from_id to retrieve the cgroup associated with cgroup id. Exported the same as this can be used by blk-cgorup.c Added function declaration of cgroup_get_from_id in cgorup.h This patch also exported the function cgroup_get_e_css as this is getting used in blk-cgroup.h Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Muneendra <muneendra.kumar@broadcom.com> --- v9: Addressed the issues reported by kernel test robot v8: No change v7: No change v6: No change v5: renamed the function cgroup_get_from_kernfs_id to cgroup_get_from_id v4: No change v3: Exported the cgroup_get_e_css v2: New patch --- include/linux/cgroup.h | 6 ++++++ kernel/cgroup/cgroup.c | 26 ++++++++++++++++++++++++++ 2 files changed, 32 insertions(+) diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 4f2f79de083e..d2eace88d9d1 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -696,6 +696,7 @@ static inline void cgroup_kthread_ready(void) } void cgroup_path_from_kernfs_id(u64 id, char *buf, size_t buflen); +struct cgroup *cgroup_get_from_id(u64 id); #else /* !CONFIG_CGROUPS */ struct cgroup_subsys_state; @@ -743,6 +744,11 @@ static inline bool task_under_cgroup_hierarchy(struct task_struct *task, static inline void cgroup_path_from_kernfs_id(u64 id, char *buf, size_t buflen) {} + +static inline struct cgroup *cgroup_get_from_id(u64 id) +{ + return NULL; +} #endif /* !CONFIG_CGROUPS */ #ifdef CONFIG_CGROUPS diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index 9153b20e5cc6..20e5424a8227 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -577,6 +577,7 @@ struct cgroup_subsys_state *cgroup_get_e_css(struct cgroup *cgrp, rcu_read_unlock(); return css; } +EXPORT_SYMBOL_GPL(cgroup_get_e_css); static void cgroup_get_live(struct cgroup *cgrp) { @@ -5768,6 +5769,31 @@ void cgroup_path_from_kernfs_id(u64 id, char *buf, size_t buflen) kernfs_put(kn); } +/* + * cgroup_get_from_id : get the cgroup associated with cgroup id + * @id: cgroup id + * On success it returns the cgrp on failure it returns NULL + */ +struct cgroup *cgroup_get_from_id(u64 id) +{ + struct kernfs_node *kn; + struct cgroup *cgrp = NULL; + + mutex_lock(&cgroup_mutex); + kn = kernfs_find_and_get_node_by_id(cgrp_dfl_root.kf_root, id); + if (!kn) + goto out_unlock; + + cgrp = kn->priv; + if (cgroup_is_dead(cgrp) || !cgroup_tryget(cgrp)) + cgrp = NULL; + kernfs_put(kn); +out_unlock: + mutex_unlock(&cgroup_mutex); + return cgrp; +} +EXPORT_SYMBOL_GPL(cgroup_get_from_id); + /* * proc_cgroup_show() * - Print task's cgroup paths into seq_file, one line for each hierarchy -- 2.26.2
WARNING: multiple messages have this Message-ID (diff)
From: Muneendra <muneendra.kumar@broadcom.com> To: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, tj@kernel.org, linux-nvme@lists.infradead.org, hare@suse.de Cc: jsmart2021@gmail.com, emilne@redhat.com, mkumar@redhat.com, Muneendra <muneendra.kumar@broadcom.com> Subject: [PATCH v9 01/13] cgroup: Added cgroup_get_from_id Date: Wed, 7 Apr 2021 04:36:25 +0530 [thread overview] Message-ID: <1617750397-26466-2-git-send-email-muneendra.kumar@broadcom.com> (raw) In-Reply-To: <1617750397-26466-1-git-send-email-muneendra.kumar@broadcom.com> Added a new function cgroup_get_from_id to retrieve the cgroup associated with cgroup id. Exported the same as this can be used by blk-cgorup.c Added function declaration of cgroup_get_from_id in cgorup.h This patch also exported the function cgroup_get_e_css as this is getting used in blk-cgroup.h Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Muneendra <muneendra.kumar@broadcom.com> --- v9: Addressed the issues reported by kernel test robot v8: No change v7: No change v6: No change v5: renamed the function cgroup_get_from_kernfs_id to cgroup_get_from_id v4: No change v3: Exported the cgroup_get_e_css v2: New patch --- include/linux/cgroup.h | 6 ++++++ kernel/cgroup/cgroup.c | 26 ++++++++++++++++++++++++++ 2 files changed, 32 insertions(+) diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 4f2f79de083e..d2eace88d9d1 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -696,6 +696,7 @@ static inline void cgroup_kthread_ready(void) } void cgroup_path_from_kernfs_id(u64 id, char *buf, size_t buflen); +struct cgroup *cgroup_get_from_id(u64 id); #else /* !CONFIG_CGROUPS */ struct cgroup_subsys_state; @@ -743,6 +744,11 @@ static inline bool task_under_cgroup_hierarchy(struct task_struct *task, static inline void cgroup_path_from_kernfs_id(u64 id, char *buf, size_t buflen) {} + +static inline struct cgroup *cgroup_get_from_id(u64 id) +{ + return NULL; +} #endif /* !CONFIG_CGROUPS */ #ifdef CONFIG_CGROUPS diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index 9153b20e5cc6..20e5424a8227 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -577,6 +577,7 @@ struct cgroup_subsys_state *cgroup_get_e_css(struct cgroup *cgrp, rcu_read_unlock(); return css; } +EXPORT_SYMBOL_GPL(cgroup_get_e_css); static void cgroup_get_live(struct cgroup *cgrp) { @@ -5768,6 +5769,31 @@ void cgroup_path_from_kernfs_id(u64 id, char *buf, size_t buflen) kernfs_put(kn); } +/* + * cgroup_get_from_id : get the cgroup associated with cgroup id + * @id: cgroup id + * On success it returns the cgrp on failure it returns NULL + */ +struct cgroup *cgroup_get_from_id(u64 id) +{ + struct kernfs_node *kn; + struct cgroup *cgrp = NULL; + + mutex_lock(&cgroup_mutex); + kn = kernfs_find_and_get_node_by_id(cgrp_dfl_root.kf_root, id); + if (!kn) + goto out_unlock; + + cgrp = kn->priv; + if (cgroup_is_dead(cgrp) || !cgroup_tryget(cgrp)) + cgrp = NULL; + kernfs_put(kn); +out_unlock: + mutex_unlock(&cgroup_mutex); + return cgrp; +} +EXPORT_SYMBOL_GPL(cgroup_get_from_id); + /* * proc_cgroup_show() * - Print task's cgroup paths into seq_file, one line for each hierarchy -- 2.26.2 _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme
next prev parent reply other threads:[~2021-04-07 5:59 UTC|newest] Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-04-06 23:06 [PATCH v9 00/13] blkcg:Support to track FC storage blk io traffic Muneendra 2021-04-06 23:06 ` Muneendra 2021-04-06 23:06 ` Muneendra [this message] 2021-04-06 23:06 ` [PATCH v9 01/13] cgroup: Added cgroup_get_from_id Muneendra 2021-04-08 8:26 ` Hannes Reinecke 2021-04-08 8:26 ` Hannes Reinecke 2021-04-06 23:06 ` [PATCH v9 02/13] blkcg: Added a app identifier support for blkcg Muneendra 2021-04-06 23:06 ` Muneendra 2021-04-08 8:26 ` Hannes Reinecke 2021-04-08 8:26 ` Hannes Reinecke 2021-04-06 23:06 ` [PATCH v9 03/13] nvme: Added a newsysfs attribute appid_store Muneendra 2021-04-06 23:06 ` Muneendra 2021-04-18 15:32 ` Benjamin Block 2021-04-18 15:32 ` Benjamin Block 2021-04-20 6:54 ` Muneendra Kumar M 2021-04-20 6:54 ` Muneendra Kumar M 2021-04-20 11:09 ` Benjamin Block 2021-04-20 11:09 ` Benjamin Block 2021-04-22 23:29 ` James Smart 2021-04-22 23:29 ` James Smart 2021-04-23 10:14 ` Benjamin Block 2021-04-23 10:14 ` Benjamin Block 2021-04-06 23:06 ` [PATCH v9 04/13] lpfc: vmid: Add the datastructure for supporting VMID in lpfc Muneendra 2021-04-06 23:06 ` Muneendra 2021-04-08 8:28 ` Hannes Reinecke 2021-04-08 8:28 ` Hannes Reinecke 2021-04-06 23:06 ` [PATCH v9 05/13] lpfc: vmid: VMID params initialization Muneendra 2021-04-06 23:06 ` Muneendra 2021-04-08 8:29 ` Hannes Reinecke 2021-04-08 8:29 ` Hannes Reinecke 2021-04-06 23:06 ` [PATCH v9 06/13] lpfc: vmid: Add support for vmid in mailbox command, does vmid resource allocation and vmid cleanup Muneendra 2021-04-06 23:06 ` Muneendra 2021-04-08 8:32 ` Hannes Reinecke 2021-04-08 8:32 ` Hannes Reinecke 2021-04-06 23:06 ` [PATCH v9 07/13] lpfc: vmid: Implements ELS commands for appid patch Muneendra 2021-04-06 23:06 ` Muneendra 2021-04-08 8:34 ` Hannes Reinecke 2021-04-08 8:34 ` Hannes Reinecke 2021-04-20 12:38 ` Benjamin Block 2021-04-20 12:38 ` Benjamin Block 2021-04-21 22:55 ` James Smart 2021-04-21 22:55 ` James Smart 2021-04-22 9:28 ` Benjamin Block 2021-04-22 9:28 ` Benjamin Block 2021-04-06 23:06 ` [PATCH v9 08/13] lpfc: vmid: Functions to manage vmids Muneendra 2021-04-06 23:06 ` Muneendra 2021-04-08 8:35 ` Hannes Reinecke 2021-04-08 8:35 ` Hannes Reinecke 2021-04-06 23:06 ` [PATCH v9 09/13] lpfc: vmid: Implements CT commands for appid Muneendra 2021-04-06 23:06 ` Muneendra 2021-04-08 8:37 ` Hannes Reinecke 2021-04-08 8:37 ` Hannes Reinecke 2021-04-06 23:06 ` [PATCH v9 10/13] lpfc: vmid: Appends the vmid in the wqe before sending Muneendra 2021-04-06 23:06 ` Muneendra 2021-04-06 23:06 ` [PATCH v9 11/13] lpfc: vmid: Timeout implementation for vmid Muneendra 2021-04-06 23:06 ` Muneendra 2021-04-08 8:38 ` Hannes Reinecke 2021-04-08 8:38 ` Hannes Reinecke 2021-04-06 23:06 ` [PATCH v9 12/13] lpfc: vmid: Adding qfpa and vmid timeout check in worker thread Muneendra 2021-04-06 23:06 ` Muneendra 2021-04-06 23:06 ` [PATCH v9 13/13] lpfc: vmid: Introducing vmid in io path Muneendra 2021-04-06 23:06 ` Muneendra 2021-04-08 8:46 ` Hannes Reinecke 2021-04-08 8:46 ` Hannes Reinecke 2021-04-10 15:00 ` James Smart 2021-04-10 15:00 ` James Smart 2021-04-12 5:27 ` Hannes Reinecke 2021-04-12 5:27 ` Hannes Reinecke
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