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 Cc: jsmart2021@gmail.com, emilne@redhat.com, mkumar@redhat.com, pbonzini@redhat.com, Muneendra <muneendra.kumar@broadcom.com> Subject: [PATCH v4 01/19] cgroup: Added cgroup_get_from_kernfs_id Date: Mon, 9 Nov 2020 09:53:47 +0530 [thread overview] Message-ID: <1604895845-2587-2-git-send-email-muneendra.kumar@broadcom.com> (raw) In-Reply-To: <1604895845-2587-1-git-send-email-muneendra.kumar@broadcom.com> [-- Attachment #1: Type: text/plain, Size: 2537 bytes --] Added a new function cgroup_get_from_kernfs_id to retrieve the cgroup associated with cgroup id. It takes cgroupid as an argument and returns cgrp and on failure it returns NULL. Exported the same as this can be used by blk-cgorup.c Added function declaration of cgroup_get_from_kernfs_id in cgorup.h Exported the cgroup_get_e_css Signed-off-by: Muneendra <muneendra.kumar@broadcom.com> --- 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 618838c48313..1741f02a41d6 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_kernfs_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 struct cgroup *cgroup_get_from_kernfs_id(u64 id) +{ + return NULL; +} #endif /* !CONFIG_CGROUPS */ #ifdef CONFIG_CGROUPS diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index dd247747ec14..53046deeb9ca 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -580,6 +580,7 @@ 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) { @@ -5803,6 +5804,31 @@ void cgroup_path_from_kernfs_id(u64 id, char *buf, size_t buflen) kernfs_put(kn); } +/* + * cgroup_get_from_kernfs_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_kernfs_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_kernfs_id); + /* * proc_cgroup_show() * - Print task's cgroup paths into seq_file, one line for each hierarchy -- 2.26.2 [-- Attachment #2: S/MIME Cryptographic Signature --] [-- Type: application/pkcs7-signature, Size: 4177 bytes --]
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 Cc: pbonzini@redhat.com, jsmart2021@gmail.com, mkumar@redhat.com, emilne@redhat.com, Muneendra <muneendra.kumar@broadcom.com> Subject: [PATCH v4 01/19] cgroup: Added cgroup_get_from_kernfs_id Date: Mon, 9 Nov 2020 09:53:47 +0530 [thread overview] Message-ID: <1604895845-2587-2-git-send-email-muneendra.kumar@broadcom.com> (raw) In-Reply-To: <1604895845-2587-1-git-send-email-muneendra.kumar@broadcom.com> [-- Attachment #1.1: Type: text/plain, Size: 2537 bytes --] Added a new function cgroup_get_from_kernfs_id to retrieve the cgroup associated with cgroup id. It takes cgroupid as an argument and returns cgrp and on failure it returns NULL. Exported the same as this can be used by blk-cgorup.c Added function declaration of cgroup_get_from_kernfs_id in cgorup.h Exported the cgroup_get_e_css Signed-off-by: Muneendra <muneendra.kumar@broadcom.com> --- 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 618838c48313..1741f02a41d6 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_kernfs_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 struct cgroup *cgroup_get_from_kernfs_id(u64 id) +{ + return NULL; +} #endif /* !CONFIG_CGROUPS */ #ifdef CONFIG_CGROUPS diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index dd247747ec14..53046deeb9ca 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -580,6 +580,7 @@ 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) { @@ -5803,6 +5804,31 @@ void cgroup_path_from_kernfs_id(u64 id, char *buf, size_t buflen) kernfs_put(kn); } +/* + * cgroup_get_from_kernfs_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_kernfs_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_kernfs_id); + /* * proc_cgroup_show() * - Print task's cgroup paths into seq_file, one line for each hierarchy -- 2.26.2 [-- Attachment #1.2: S/MIME Cryptographic Signature --] [-- Type: application/pkcs7-signature, Size: 4177 bytes --] [-- Attachment #2: Type: text/plain, Size: 158 bytes --] _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme
next prev parent reply other threads:[~2020-11-09 11:17 UTC|newest] Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-11-09 4:23 [PATCH v4 00/19] blkcg:Support to track FC storage blk io traffic Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-09 4:23 ` Muneendra [this message] 2020-11-09 4:23 ` [PATCH v4 01/19] cgroup: Added cgroup_get_from_kernfs_id Muneendra 2020-11-16 7:25 ` Hannes Reinecke 2020-11-16 7:25 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 02/19] blkcg: Added a app identifier support for blkcg Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-09 13:55 ` Tejun Heo 2020-11-09 13:55 ` Tejun Heo 2020-11-16 7:31 ` Hannes Reinecke 2020-11-16 7:31 ` Hannes Reinecke 2020-11-18 9:39 ` Muneendra Kumar M 2020-11-18 9:39 ` Muneendra Kumar M 2020-11-09 4:23 ` [PATCH v4 03/19] nvme: Added a newsysfs attribute appid_store Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:39 ` Hannes Reinecke 2020-11-16 7:39 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 04/19] lpfc: vmid: Add the datastructure for supporting VMID in lpfc Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:41 ` Hannes Reinecke 2020-11-16 7:41 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 05/19] lpfc: vmid: API to check if VMID is enabled Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:44 ` Hannes Reinecke 2020-11-16 7:44 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 06/19] lpfc: vmid: Supplementary data structures for vmid Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:49 ` Hannes Reinecke 2020-11-16 7:49 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 07/19] lpfc: vmid: Forward declarations for APIs Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:50 ` Hannes Reinecke 2020-11-16 7:50 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 08/19] lpfc: vmid: Add support for vmid in mailbox command Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:52 ` Hannes Reinecke 2020-11-16 7:52 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 09/19] lpfc: vmid: VMID params initialization Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:53 ` Hannes Reinecke 2020-11-16 7:53 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 10/19] lpfc: vmid: vmid resource allocation Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:56 ` Hannes Reinecke 2020-11-16 7:56 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 11/19] lpfc: vmid: cleanup vmid resources Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:56 ` Hannes Reinecke 2020-11-16 7:56 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 12/19] lpfc: vmid: Implements ELS commands for appid patch Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 8:03 ` Hannes Reinecke 2020-11-16 8:03 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 13/19] lpfc: vmid: Functions to manage vmids Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 8:06 ` Hannes Reinecke 2020-11-16 8:06 ` Hannes Reinecke 2020-11-09 4:24 ` [PATCH v4 14/19] lpfc: vmid: Implements CT commands for appid Muneendra 2020-11-09 4:24 ` Muneendra 2020-11-16 8:08 ` Hannes Reinecke 2020-11-16 8:08 ` Hannes Reinecke 2020-11-09 4:24 ` [PATCH v4 15/19] lpfc: vmid: Appends the vmid in the wqe before sending request Muneendra 2020-11-09 4:24 ` Muneendra 2020-11-16 8:10 ` Hannes Reinecke 2020-11-16 8:10 ` Hannes Reinecke 2020-11-09 4:24 ` [PATCH v4 16/19] lpfc: vmid: Timeout implementation for vmid Muneendra 2020-11-09 4:24 ` Muneendra 2020-11-16 8:11 ` Hannes Reinecke 2020-11-16 8:11 ` Hannes Reinecke 2020-11-09 4:24 ` [PATCH v4 17/19] lpfc: vmid: Adding qfpa and vmid timeout check in worker thread Muneendra 2020-11-09 4:24 ` Muneendra 2020-11-16 8:12 ` Hannes Reinecke 2020-11-16 8:12 ` Hannes Reinecke 2020-11-09 4:24 ` [PATCH v4 18/19] lpfc: vmid: Introducing vmid in io path Muneendra 2020-11-09 4:24 ` Muneendra 2020-11-16 8:13 ` Hannes Reinecke 2020-11-16 8:13 ` Hannes Reinecke 2020-11-09 4:24 ` [PATCH v4 19/19] scsi: Made changes in Kconfig to select BLK_CGROUP_FC_APPID Muneendra 2020-11-09 4:24 ` Muneendra 2020-11-16 8:15 ` Hannes Reinecke 2020-11-16 8:15 ` Hannes Reinecke
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